web/dashboard.js

   1 // You can set the following variables before loading this script:
   2 //
   3 // var netdataNoDygraphs = true;                // do not use dygraph
   4 // var netdataNoSparklines = true;              // do not use sparkline
   5 // var netdataNoPeitys = true;                  // do not use peity
   6 // var netdataNoGoogleCharts = true;    // do not use google
   7 // var netdataNoMorris = true;                  // do not use morris
   8 // var netdataNoEasyPieChart = true;    // do not use easy pie chart
   9 // var netdataNoGauge = true;                   // do not use gauge.js
  10 // var netdataNoD3 = true;                              // do not use D3
  11 // var netdataNoC3 = true;                              // do not use C3
  12 // var netdataNoBootstrap = true;               // do not load bootstrap
  13 // var netdataDontStart = true;                 // do not start the thread to process the charts
  14 //
  15 // You can also set the default netdata server, using the following.
  16 // When this variable is not set, we assume the page is hosted on your
  17 // netdata server already.
  18 // var netdataServer = "http://yourhost:19999"; // set your NetData server
  19
  20 //(function(window, document, undefined) {
  21         // fix IE issue with console
  22         if(!window.console){ window.console = {log: function(){} }; }
  23
  24         // global namespace
  25         var NETDATA = window.NETDATA || {};
  26
  27         // ----------------------------------------------------------------------------------------------------------------
  28         // Detect the netdata server
  29
  30         // http://stackoverflow.com/questions/984510/what-is-my-script-src-url
  31         // http://stackoverflow.com/questions/6941533/get-protocol-domain-and-port-from-url
  32         NETDATA._scriptSource = function() {
  33                 var script = null;
  34
  35                 if(typeof document.currentScript !== 'undefined') {
  36                         script = document.currentScript;
  37                 }
  38                 else {
  39                         var all_scripts = document.getElementsByTagName('script');
  40                         script = all_scripts[all_scripts.length - 1];
  41                 }
  42
  43                 if (typeof script.getAttribute.length !== 'undefined')
  44                         script = script.src;
  45                 else
  46                         script = script.getAttribute('src', -1);
  47
  48                 return script;
  49         };
  50
  51         if(typeof netdataServer !== 'undefined')
  52                 NETDATA.serverDefault = netdataServer;
  53         else {
  54                 var s = NETDATA._scriptSource();
  55                 NETDATA.serverDefault = s.replace(/\/dashboard.js(\?.*)*$/g, "");
  56         }
  57
  58         if(NETDATA.serverDefault === null)
  59                 NETDATA.serverDefault = '';
  60         else if(NETDATA.serverDefault.slice(-1) !== '/')
  61                 NETDATA.serverDefault += '/';
  62
  63         // default URLs for all the external files we need
  64         // make them RELATIVE so that the whole thing can also be
  65         // installed under a web server
  66         NETDATA.jQuery                  = NETDATA.serverDefault + 'lib/jquery-1.12.0.min.js';
  67         NETDATA.peity_js                = NETDATA.serverDefault + 'lib/jquery.peity.min.js';
  68         NETDATA.sparkline_js            = NETDATA.serverDefault + 'lib/jquery.sparkline.min.js';
  69         NETDATA.easypiechart_js         = NETDATA.serverDefault + 'lib/jquery.easypiechart.min.js';
  70         NETDATA.gauge_js                        = NETDATA.serverDefault + 'lib/gauge.min.js';
  71         NETDATA.dygraph_js              = NETDATA.serverDefault + 'lib/dygraph-combined.js';
  72         NETDATA.dygraph_smooth_js   = NETDATA.serverDefault + 'lib/dygraph-smooth-plotter.js';
  73         NETDATA.raphael_js              = NETDATA.serverDefault + 'lib/raphael-min.js';
  74         NETDATA.morris_js               = NETDATA.serverDefault + 'lib/morris.min.js';
  75         NETDATA.d3_js                           = NETDATA.serverDefault + 'lib/d3.min.js';
  76         NETDATA.c3_js                           = NETDATA.serverDefault + 'lib/c3.min.js';
  77         NETDATA.c3_css                          = NETDATA.serverDefault + 'css/c3.min.css';
  78         NETDATA.morris_css              = NETDATA.serverDefault + 'css/morris.css';
  79         NETDATA.google_js               = 'https://www.google.com/jsapi';
  80
  81         NETDATA.themes = {
  82                 default: {
  83                         bootstrap_css: NETDATA.serverDefault + 'css/bootstrap.min.css',
  84                         dashboard_css: NETDATA.serverDefault + 'dashboard.css',
  85                         background: '#FFFFFF',
  86                         foreground: '#000000',
  87                         grid: '#DDDDDD',
  88                         axis: '#CCCCCC',
  89                         colors: [       '#3366CC', '#DC3912',   '#109618', '#FF9900',   '#990099', '#DD4477',
  90                                                 '#3B3EAC', '#66AA00',   '#0099C6', '#B82E2E',   '#AAAA11', '#5574A6',
  91                                                 '#994499', '#22AA99',   '#6633CC', '#E67300',   '#316395', '#8B0707',
  92                                                 '#329262', '#3B3EAC' ],
  93                         easypiechart_track: '#f0f0f0',
  94                         easypiechart_scale: '#dfe0e0',
  95                         gauge_pointer: '#C0C0C0',
  96                         gauge_stroke: '#F0F0F0',
  97                         gauge_gradient: true
  98                 },
  99                 slate: {
 100                         bootstrap_css: NETDATA.serverDefault + 'css/bootstrap.slate.min.css',
 101                         dashboard_css: NETDATA.serverDefault + 'dashboard.slate.css',
 102                         background: '#272b30',
 103                         foreground: '#C8C8C8',
 104                         grid: '#373b40',
 105                         axis: '#373b40',
 106 /*                      colors: [       '#55bb33', '#ff2222',   '#0099C6', '#faa11b',   '#adbce0', '#DDDD00',
 107                                                 '#4178ba', '#f58122',   '#a5cc39', '#f58667',   '#f5ef89', '#cf93c0',
 108                                                 '#a5d18a', '#b8539d',   '#3954a3', '#c8a9cf',   '#c7de8a', '#fad20a',
 109                                                 '#a6a479', '#a66da8' ],
 110 */
 111                         colors: [       '#66AA00', '#FE3912',   '#3366CC', '#D66300',   '#0099C6', '#DDDD00',
 112                                                 '#3B3EAC', '#EE9911',   '#BB44CC', '#C83E3E',   '#990099', '#CC7700',
 113                                                 '#22AA99', '#109618',   '#6633CC', '#DD4477',   '#316395', '#8B0707',
 114                                                 '#329262', '#3B3EFF' ],
 115                         easypiechart_track: '#373b40',
 116                         easypiechart_scale: '#373b40',
 117                         gauge_pointer: '#474b50',
 118                         gauge_stroke: '#373b40',
 119                         gauge_gradient: false
 120                 }
 121         };
 122
 123         if(typeof netdataTheme !== 'undefined' && typeof NETDATA.themes[netdataTheme] !== 'undefined')
 124                 NETDATA.themes.current = NETDATA.themes[netdataTheme];
 125         else
 126                 NETDATA.themes.current = NETDATA.themes.default;
 127
 128         NETDATA.colors = NETDATA.themes.current.colors;
 129
 130         // these are the colors Google Charts are using
 131         // we have them here to attempt emulate their look and feel on the other chart libraries
 132         // http://there4.io/2012/05/02/google-chart-color-list/
 133         //NETDATA.colors                = [ '#3366CC', '#DC3912', '#FF9900', '#109618', '#990099', '#3B3EAC', '#0099C6',
 134         //                                              '#DD4477', '#66AA00', '#B82E2E', '#316395', '#994499', '#22AA99', '#AAAA11',
 135         //                                              '#6633CC', '#E67300', '#8B0707', '#329262', '#5574A6', '#3B3EAC' ];
 136
 137         // an alternative set
 138         // http://www.mulinblog.com/a-color-palette-optimized-for-data-visualization/
 139         //                         (blue)     (red)      (orange)   (green)    (pink)     (brown)    (purple)   (yellow)   (gray)
 140         //NETDATA.colors                = [ '#5DA5DA', '#F15854', '#FAA43A', '#60BD68', '#F17CB0', '#B2912F', '#B276B2', '#DECF3F', '#4D4D4D' ];
 141
 142         // ----------------------------------------------------------------------------------------------------------------
 143         // the defaults for all charts
 144
 145         // if the user does not specify any of these, the following will be used
 146
 147         NETDATA.chartDefaults = {
 148                 host: NETDATA.serverDefault,    // the server to get data from
 149                 width: '100%',                                  // the chart width - can be null
 150                 height: '100%',                                 // the chart height - can be null
 151                 min_width: null,                                // the chart minimum width - can be null
 152                 library: 'dygraph',                             // the graphing library to use
 153                 method: 'average',                              // the grouping method
 154                 before: 0,                                              // panning
 155                 after: -600,                                    // panning
 156                 pixels_per_point: 1,                    // the detail of the chart
 157                 fill_luminance: 0.8                             // luminance of colors in solit areas
 158         }
 159
 160         // ----------------------------------------------------------------------------------------------------------------
 161         // global options
 162
 163         NETDATA.options = {
 164                 pauseCallback: null,                    // a callback when we are really paused
 165
 166                 pause: false,                                   // when enabled we don't auto-refresh the charts
 167
 168                 targets: null,                                  // an array of all the state objects that are
 169                                                                                 // currently active (independently of their
 170                                                                                 // viewport visibility)
 171
 172                 updated_dom: true,                              // when true, the DOM has been updated with
 173                                                                                 // new elements we have to check.
 174
 175                 auto_refresher_fast_weight: 0,  // this is the current time in ms, spent
 176                                                                                 // rendering charts continiously.
 177                                                                                 // used with .current.fast_render_timeframe
 178
 179                 page_is_visible: true,                  // when true, this page is visible
 180
 181                 auto_refresher_stop_until: 0,   // timestamp in ms - used internaly, to stop the
 182                                                                                 // auto-refresher for some time (when a chart is
 183                                                                                 // performing pan or zoom, we need to stop refreshing
 184                                                                                 // all other charts, to have the maximum speed for
 185                                                                                 // rendering the chart that is panned or zoomed).
 186                                                                                 // Used with .current.global_pan_sync_time
 187
 188                 last_resized: new Date().getTime(), // the timestamp of the last resize request
 189
 190                 crossDomainAjax: false,                 // enable this to request crossDomain AJAX
 191
 192                 last_page_scroll: 0,                    // the timestamp the last time the page was scrolled
 193
 194                 // the current profile
 195                 // we may have many...
 196                 current: {
 197                         pixels_per_point: 1,            // the minimum pixels per point for all charts
 198                                                                                 // increase this to speed javascript up
 199                                                                                 // each chart library has its own limit too
 200                                                                                 // the max of this and the chart library is used
 201                                                                                 // the final is calculated every time, so a change
 202                                                                                 // here will have immediate effect on the next chart
 203                                                                                 // update
 204
 205                         idle_between_charts: 100,       // ms - how much time to wait between chart updates
 206
 207                         fast_render_timeframe: 200, // ms - render continously until this time of continious
 208                                                                                 // rendering has been reached
 209                                                                                 // this setting is used to make it render e.g. 10
 210                                                                                 // charts at once, sleep idle_between_charts time
 211                                                                                 // and continue for another 10 charts.
 212
 213                         idle_between_loops: 500,        // ms - if all charts have been updated, wait this
 214                                                                                 // time before starting again.
 215
 216                         idle_parallel_loops: 100,       // ms - the time between parallel refresher updates
 217
 218                         idle_lost_focus: 500,           // ms - when the window does not have focus, check
 219                                                                                 // if focus has been regained, every this time
 220
 221                         global_pan_sync_time: 1000,     // ms - when you pan or zoon a chart, the background
 222                                                                                 // autorefreshing of charts is paused for this amount
 223                                                                                 // of time
 224
 225                         sync_selection_delay: 1500,     // ms - when you pan or zoom a chart, wait this amount
 226                                                                                 // of time before setting up synchronized selections
 227                                                                                 // on hover.
 228
 229                         sync_selection: true,           // enable or disable selection sync
 230
 231                         pan_and_zoom_delay: 50,         // when panning or zooming, how ofter to update the chart
 232
 233                         sync_pan_and_zoom: true,        // enable or disable pan and zoom sync
 234
 235                         pan_and_zoom_data_padding: true, // fetch more data for the master chart when panning or zooming
 236
 237                         update_only_visible: true,      // enable or disable visibility management
 238
 239                         parallel_refresher: true,       // enable parallel refresh of charts
 240
 241                         concurrent_refreshes: true,     // when parallel_refresher is enabled, sync also the charts
 242
 243                         destroy_on_hide: false,         // destroy charts when they are not visible
 244
 245                         show_help: true,                        // when enabled the charts will show some help
 246
 247                         eliminate_zero_dimensions: true, // do not show dimensions with just zeros
 248
 249                         stop_updates_when_focus_is_lost: true, // boolean - shall we stop auto-refreshes when document does not have user focus
 250                         stop_updates_while_resizing: 1000,      // ms - time to stop auto-refreshes while resizing the charts
 251
 252                         double_click_speed: 500,        // ms - time between clicks / taps to detect double click/tap
 253
 254                         smooth_plot: true,                      // enable smooth plot, where possible
 255
 256                         charts_selection_animation_delay: 50, // delay to animate charts when syncing selection
 257
 258                         color_fill_opacity_line: 1.0,
 259                         color_fill_opacity_area: 0.2,
 260                         color_fill_opacity_stacked: 0.8,
 261
 262                         pan_and_zoom_step: 0.1,         // the increment when panning and zooming with the toolbox
 263
 264                         setOptionCallback: function() { ; }
 265                 },
 266
 267                 debug: {
 268                         show_boxes:             false,
 269                         main_loop:                      false,
 270                         focus:                          false,
 271                         visibility:             false,
 272                         chart_data_url:         false,
 273                         chart_errors:           false, // FIXME
 274                         chart_timing:           false,
 275                         chart_calls:            false,
 276                         libraries:                      false,
 277                         dygraph:                        false
 278                 }
 279         }
 280
 281
 282         // ----------------------------------------------------------------------------------------------------------------
 283         // local storage options
 284
 285         NETDATA.localStorage = {
 286                 default: {},
 287                 current: {},
 288                 callback: {} // only used for resetting back to defaults
 289         };
 290
 291         NETDATA.localStorageGet = function(key, def, callback) {
 292                 var ret = def;
 293
 294                 if(typeof NETDATA.localStorage.default[key.toString()] === 'undefined') {
 295                         NETDATA.localStorage.default[key.toString()] = def;
 296                         NETDATA.localStorage.callback[key.toString()] = callback;
 297                 }
 298
 299                 if(typeof Storage !== "undefined" && typeof localStorage === 'object') {
 300                         try {
 301                                 // console.log('localStorage: loading "' + key.toString() + '"');
 302                                 ret = localStorage.getItem(key.toString());
 303                                 if(ret === null || ret === 'undefined') {
 304                                         // console.log('localStorage: cannot load it, saving "' + key.toString() + '" with value "' + JSON.stringify(def) + '"');
 305                                         localStorage.setItem(key.toString(), JSON.stringify(def));
 306                                         ret = def;
 307                                 }
 308                                 else {
 309                                         // console.log('localStorage: got "' + key.toString() + '" with value "' + ret + '"');
 310                                         ret = JSON.parse(ret);
 311                                         // console.log('localStorage: loaded "' + key.toString() + '" as value ' + ret + ' of type ' + typeof(ret));
 312                                 }
 313                         }
 314                         catch(error) {
 315                                 console.log('localStorage: failed to read "' + key.toString() + '", using default: "' + def.toString() + '"');
 316                                 ret = def;
 317                         }
 318                 }
 319
 320                 if(typeof ret === 'undefined' || ret === 'undefined') {
 321                         console.log('localStorage: LOADED UNDEFINED "' + key.toString() + '" as value ' + ret + ' of type ' + typeof(ret));
 322                         ret = def;
 323                 }
 324
 325                 NETDATA.localStorage.current[key.toString()] = ret;
 326                 return ret;
 327         }
 328
 329         NETDATA.localStorageSet = function(key, value, callback) {
 330                 if(typeof value === 'undefined' || value === 'undefined') {
 331                         console.log('localStorage: ATTEMPT TO SET UNDEFINED "' + key.toString() + '" as value ' + value + ' of type ' + typeof(value));
 332                 }
 333
 334                 if(typeof NETDATA.localStorage.default[key.toString()] === 'undefined') {
 335                         NETDATA.localStorage.default[key.toString()] = value;
 336                         NETDATA.localStorage.current[key.toString()] = value;
 337                         NETDATA.localStorage.callback[key.toString()] = callback;
 338                 }
 339
 340                 if(typeof Storage !== "undefined" && typeof localStorage === 'object') {
 341                         // console.log('localStorage: saving "' + key.toString() + '" with value "' + JSON.stringify(value) + '"');
 342                         try {
 343                                 localStorage.setItem(key.toString(), JSON.stringify(value));
 344                         }
 345                         catch(e) {
 346                                 console.log('localStorage: failed to save "' + key.toString() + '" with value: "' + value.toString() + '"');
 347                         }
 348                 }
 349
 350                 NETDATA.localStorage.current[key.toString()] = value;
 351                 return value;
 352         }
 353
 354         NETDATA.localStorageGetRecursive = function(obj, prefix, callback) {
 355                 for(var i in obj) {
 356                         if(typeof obj[i] === 'object') {
 357                                 //console.log('object ' + prefix + '.' + i.toString());
 358                                 NETDATA.localStorageGetRecursive(obj[i], prefix + '.' + i.toString(), callback);
 359                                 continue;
 360                         }
 361
 362                         obj[i] = NETDATA.localStorageGet(prefix + '.' + i.toString(), obj[i], callback);
 363                 }
 364         }
 365
 366         NETDATA.setOption = function(key, value) {
 367                 if(key.toString() === 'setOptionCallback') {
 368                         if(typeof NETDATA.options.current.setOptionCallback === 'function') {
 369                                 NETDATA.options.current[key.toString()] = value;
 370                                 NETDATA.options.current.setOptionCallback();
 371                         }
 372                 }
 373                 else if(NETDATA.options.current[key.toString()] !== value) {
 374                         var name = 'options.' + key.toString();
 375
 376                         if(typeof NETDATA.localStorage.default[name.toString()] === 'undefined')
 377                                 console.log('localStorage: setOption() on unsaved option: "' + name.toString() + '", value: ' + value);
 378
 379                         //console.log(NETDATA.localStorage);
 380                         //console.log('setOption: setting "' + key.toString() + '" to "' + value + '" of type ' + typeof(value) + ' original type ' + typeof(NETDATA.options.current[key.toString()]));
 381                         //console.log(NETDATA.options);
 382                         NETDATA.options.current[key.toString()] = NETDATA.localStorageSet(name.toString(), value, null);
 383
 384                         if(typeof NETDATA.options.current.setOptionCallback === 'function')
 385                                 NETDATA.options.current.setOptionCallback();
 386                 }
 387
 388                 return true;
 389         }
 390
 391         NETDATA.getOption = function(key) {
 392                 return NETDATA.options.current[key.toString()];
 393         }
 394
 395         // read settings from local storage
 396         NETDATA.localStorageGetRecursive(NETDATA.options.current, 'options', null);
 397
 398         // always start with this option enabled.
 399         NETDATA.setOption('stop_updates_when_focus_is_lost', true);
 400
 401         NETDATA.resetOptions = function() {
 402                 for(var i in NETDATA.localStorage.default) {
 403                         var a = i.split('.');
 404
 405                         if(a[0] === 'options') {
 406                                 if(a[1] === 'setOptionCallback') continue;
 407                                 if(typeof NETDATA.localStorage.default[i] === 'undefined') continue;
 408                                 if(NETDATA.options.current[i] === NETDATA.localStorage.default[i]) continue;
 409
 410                                 NETDATA.setOption(a[1], NETDATA.localStorage.default[i]);
 411                         }
 412                         else if(a[0] === 'chart_heights') {
 413                                 if(typeof NETDATA.localStorage.callback[i] === 'function' && typeof NETDATA.localStorage.default[i] !== 'undefined') {
 414                                         NETDATA.localStorage.callback[i](NETDATA.localStorage.default[i]);
 415                                 }
 416                         }
 417                 }
 418         }
 419
 420         // ----------------------------------------------------------------------------------------------------------------
 421
 422         if(NETDATA.options.debug.main_loop === true)
 423                 console.log('welcome to NETDATA');
 424
 425         NETDATA.onresize = function() {
 426                 NETDATA.options.last_resized = new Date().getTime();
 427                 NETDATA.onscroll();
 428         };
 429
 430         NETDATA.onscroll = function() {
 431                 // console.log('onscroll');
 432
 433                 NETDATA.options.last_page_scroll = new Date().getTime();
 434                 if(NETDATA.options.targets === null) return;
 435
 436                 // when the user scrolls he sees that we have
 437                 // hidden all the not-visible charts
 438                 // using this little function we try to switch
 439                 // the charts back to visible quickly
 440                 var targets = NETDATA.options.targets;
 441                 var len = targets.length;
 442                 while(len--) targets[len].isVisible();
 443         };
 444
 445         window.onresize = NETDATA.onresize;
 446         window.onscroll = NETDATA.onscroll;
 447
 448         // ----------------------------------------------------------------------------------------------------------------
 449         // Error Handling
 450
 451         NETDATA.errorCodes = {
 452                 100: { message: "Cannot load chart library", alert: true },
 453                 101: { message: "Cannot load jQuery", alert: true },
 454                 402: { message: "Chart library not found", alert: false },
 455                 403: { message: "Chart library not enabled/is failed", alert: false },
 456                 404: { message: "Chart not found", alert: false }
 457         };
 458         NETDATA.errorLast = {
 459                 code: 0,
 460                 message: "",
 461                 datetime: 0
 462         };
 463
 464         NETDATA.error = function(code, msg) {
 465                 NETDATA.errorLast.code = code;
 466                 NETDATA.errorLast.message = msg;
 467                 NETDATA.errorLast.datetime = new Date().getTime();
 468
 469                 console.log("ERROR " + code + ": " + NETDATA.errorCodes[code].message + ": " + msg);
 470
 471                 if(NETDATA.errorCodes[code].alert)
 472                         alert("ERROR " + code + ": " + NETDATA.errorCodes[code].message + ": " + msg);
 473         }
 474
 475         NETDATA.errorReset = function() {
 476                 NETDATA.errorLast.code = 0;
 477                 NETDATA.errorLast.message = "You are doing fine!";
 478                 NETDATA.errorLast.datetime = 0;
 479         };
 480
 481         // ----------------------------------------------------------------------------------------------------------------
 482         // Chart Registry
 483
 484         // When multiple charts need the same chart, we avoid downloading it
 485         // multiple times (and having it in browser memory multiple time)
 486         // by using this registry.
 487
 488         // Every time we download a chart definition, we save it here with .add()
 489         // Then we try to get it back with .get(). If that fails, we download it.
 490
 491         NETDATA.chartRegistry = {
 492                 charts: {},
 493
 494                 fixid: function(id) {
 495                         return id.replace(/:/g, "_").replace(/\//g, "_");
 496                 },
 497
 498                 add: function(host, id, data) {
 499                         host = this.fixid(host);
 500                         id   = this.fixid(id);
 501
 502                         if(typeof this.charts[host] === 'undefined')
 503                                 this.charts[host] = {};
 504
 505                         //console.log('added ' + host + '/' + id);
 506                         this.charts[host][id] = data;
 507                 },
 508
 509                 get: function(host, id) {
 510                         host = this.fixid(host);
 511                         id   = this.fixid(id);
 512
 513                         if(typeof this.charts[host] === 'undefined')
 514                                 return null;
 515
 516                         if(typeof this.charts[host][id] === 'undefined')
 517                                 return null;
 518
 519                         //console.log('cached ' + host + '/' + id);
 520                         return this.charts[host][id];
 521                 },
 522
 523                 downloadAll: function(host, callback) {
 524                         while(host.slice(-1) === '/')
 525                                 host = host.substring(0, host.length - 1);
 526
 527                         var self = this;
 528
 529                         $.ajax({
 530                                 url: host + '/api/v1/charts',
 531                                 crossDomain: NETDATA.options.crossDomainAjax,
 532                                 async: true,
 533                                 cache: false
 534                         })
 535                         .done(function(data) {
 536                                 var h = NETDATA.chartRegistry.fixid(host);
 537                                 //console.log('downloaded all charts from ' + host + ' (' + h + ')');
 538                                 self.charts[h] = data.charts;
 539                                 if(typeof callback === 'function')
 540                                         callback(data);
 541                         })
 542                         .fail(function() {
 543                                 if(typeof callback === 'function')
 544                                         callback(null);
 545                         });
 546                 }
 547         };
 548
 549         // ----------------------------------------------------------------------------------------------------------------
 550         // Global Pan and Zoom on charts
 551
 552         // Using this structure are synchronize all the charts, so that
 553         // when you pan or zoom one, all others are automatically refreshed
 554         // to the same timespan.
 555
 556         NETDATA.globalPanAndZoom = {
 557                 seq: 0,                                 // timestamp ms
 558                                                                 // every time a chart is panned or zoomed
 559                                                                 // we set the timestamp here
 560                                                                 // then we use it as a sequence number
 561                                                                 // to find if other charts are syncronized
 562                                                                 // to this timerange
 563
 564                 master: null,                   // the master chart (state), to which all others
 565                                                                 // are synchronized
 566
 567                 force_before_ms: null,  // the timespan to sync all other charts
 568                 force_after_ms: null,
 569
 570                 // set a new master
 571                 setMaster: function(state, after, before) {
 572                         if(NETDATA.options.current.sync_pan_and_zoom === false)
 573                                 return;
 574
 575                         if(this.master !== null && this.master !== state)
 576                                 this.master.resetChart(true, true);
 577
 578                         var now = new Date().getTime();
 579                         this.master = state;
 580                         this.seq = now;
 581                         this.force_after_ms = after;
 582                         this.force_before_ms = before;
 583                         NETDATA.options.auto_refresher_stop_until = now + NETDATA.options.current.global_pan_sync_time;
 584                 },
 585
 586                 // clear the master
 587                 clearMaster: function() {
 588                         if(this.master !== null) {
 589                                 var st = this.master;
 590                                 this.master = null;
 591                                 st.resetChart();
 592                         }
 593
 594                         this.master = null;
 595                         this.seq = 0;
 596                         this.force_after_ms = null;
 597                         this.force_before_ms = null;
 598                         NETDATA.options.auto_refresher_stop_until = 0;
 599                 },
 600
 601                 // is the given state the master of the global
 602                 // pan and zoom sync?
 603                 isMaster: function(state) {
 604                         if(this.master === state) return true;
 605                         return false;
 606                 },
 607
 608                 // are we currently have a global pan and zoom sync?
 609                 isActive: function() {
 610                         if(this.master !== null && this.force_before_ms !== null && this.force_after_ms !== null && this.seq !== 0) return true;
 611                         return false;
 612                 },
 613
 614                 // check if a chart, other than the master
 615                 // needs to be refreshed, due to the global pan and zoom
 616                 shouldBeAutoRefreshed: function(state) {
 617                         if(this.master === null || this.seq === 0)
 618                                 return false;
 619
 620                         //if(state.needsRecreation())
 621                         //      return true;
 622
 623                         if(state.tm.pan_and_zoom_seq === this.seq)
 624                                 return false;
 625
 626                         return true;
 627                 }
 628         }
 629
 630         // ----------------------------------------------------------------------------------------------------------------
 631         // dimensions selection
 632
 633         // FIXME
 634         // move color assignment to dimensions, here
 635
 636         dimensionStatus = function(parent, label, name_div, value_div, color) {
 637                 this.enabled = false;
 638                 this.parent = parent;
 639                 this.label = label;
 640                 this.name_div = null;
 641                 this.value_div = null;
 642                 this.color = NETDATA.themes.current.foreground;
 643
 644                 if(parent.selected === parent.unselected)
 645                         this.selected = true;
 646                 else
 647                         this.selected = false;
 648
 649                 this.setOptions(name_div, value_div, color);
 650         }
 651
 652         dimensionStatus.prototype.invalidate = function() {
 653                 this.name_div = null;
 654                 this.value_div = null;
 655                 this.enabled = false;
 656         }
 657
 658         dimensionStatus.prototype.setOptions = function(name_div, value_div, color) {
 659                 this.color = color;
 660
 661                 if(this.name_div != name_div) {
 662                         this.name_div = name_div;
 663                         this.name_div.title = this.label;
 664                         this.name_div.style.color = this.color;
 665                         if(this.selected === false)
 666                                 this.name_div.className = 'netdata-legend-name not-selected';
 667                         else
 668                                 this.name_div.className = 'netdata-legend-name selected';
 669                 }
 670
 671                 if(this.value_div != value_div) {
 672                         this.value_div = value_div;
 673                         this.value_div.title = this.label;
 674                         this.value_div.style.color = this.color;
 675                         if(this.selected === false)
 676                                 this.value_div.className = 'netdata-legend-value not-selected';
 677                         else
 678                                 this.value_div.className = 'netdata-legend-value selected';
 679                 }
 680
 681                 this.enabled = true;
 682                 this.setHandler();
 683         }
 684
 685         dimensionStatus.prototype.setHandler = function() {
 686                 if(this.enabled === false) return;
 687
 688                 var ds = this;
 689
 690                 // this.name_div.onmousedown = this.value_div.onmousedown = function(e) {
 691                 this.name_div.onclick = this.value_div.onclick = function(e) {
 692                         e.preventDefault();
 693                         if(ds.isSelected()) {
 694                                 // this is selected
 695                                 if(e.shiftKey === true || e.ctrlKey === true) {
 696                                         // control or shift key is pressed -> unselect this (except is none will remain selected, in which case select all)
 697                                         ds.unselect();
 698
 699                                         if(ds.parent.countSelected() === 0)
 700                                                 ds.parent.selectAll();
 701                                 }
 702                                 else {
 703                                         // no key is pressed -> select only this (except if it is the only selected already, in which case select all)
 704                                         if(ds.parent.countSelected() === 1) {
 705                                                 ds.parent.selectAll();
 706                                         }
 707                                         else {
 708                                                 ds.parent.selectNone();
 709                                                 ds.select();
 710                                         }
 711                                 }
 712                         }
 713                         else {
 714                                 // this is not selected
 715                                 if(e.shiftKey === true || e.ctrlKey === true) {
 716                                         // control or shift key is pressed -> select this too
 717                                         ds.select();
 718                                 }
 719                                 else {
 720                                         // no key is pressed -> select only this
 721                                         ds.parent.selectNone();
 722                                         ds.select();
 723                                 }
 724                         }
 725
 726                         ds.parent.state.redrawChart();
 727                 }
 728         }
 729
 730         dimensionStatus.prototype.select = function() {
 731                 if(this.enabled === false) return;
 732
 733                 this.name_div.className = 'netdata-legend-name selected';
 734                 this.value_div.className = 'netdata-legend-value selected';
 735                 this.selected = true;
 736         }
 737
 738         dimensionStatus.prototype.unselect = function() {
 739                 if(this.enabled === false) return;
 740
 741                 this.name_div.className = 'netdata-legend-name not-selected';
 742                 this.value_div.className = 'netdata-legend-value hidden';
 743                 this.selected = false;
 744         }
 745
 746         dimensionStatus.prototype.isSelected = function() {
 747                 return(this.enabled === true && this.selected === true);
 748         }
 749
 750         // ----------------------------------------------------------------------------------------------------------------
 751
 752         dimensionsVisibility = function(state) {
 753                 this.state = state;
 754                 this.len = 0;
 755                 this.dimensions = {};
 756                 this.selected_count = 0;
 757                 this.unselected_count = 0;
 758         }
 759
 760         dimensionsVisibility.prototype.dimensionAdd = function(label, name_div, value_div, color) {
 761                 if(typeof this.dimensions[label] === 'undefined') {
 762                         this.len++;
 763                         this.dimensions[label] = new dimensionStatus(this, label, name_div, value_div, color);
 764                 }
 765                 else
 766                         this.dimensions[label].setOptions(name_div, value_div, color);
 767
 768                 return this.dimensions[label];
 769         }
 770
 771         dimensionsVisibility.prototype.dimensionGet = function(label) {
 772                 return this.dimensions[label];
 773         }
 774
 775         dimensionsVisibility.prototype.invalidateAll = function() {
 776                 for(var d in this.dimensions)
 777                         this.dimensions[d].invalidate();
 778         }
 779
 780         dimensionsVisibility.prototype.selectAll = function() {
 781                 for(var d in this.dimensions)
 782                         this.dimensions[d].select();
 783         }
 784
 785         dimensionsVisibility.prototype.countSelected = function() {
 786                 var i = 0;
 787                 for(var d in this.dimensions)
 788                         if(this.dimensions[d].isSelected()) i++;
 789
 790                 return i;
 791         }
 792
 793         dimensionsVisibility.prototype.selectNone = function() {
 794                 for(var d in this.dimensions)
 795                         this.dimensions[d].unselect();
 796         }
 797
 798         dimensionsVisibility.prototype.selected2BooleanArray = function(array) {
 799                 var ret = new Array();
 800                 this.selected_count = 0;
 801                 this.unselected_count = 0;
 802
 803                 for(var i = 0, len = array.length; i < len ; i++) {
 804                         var ds = this.dimensions[array[i]];
 805                         if(typeof ds === 'undefined') {
 806                                 // console.log(array[i] + ' is not found');
 807                                 ret.push(false);
 808                                 continue;
 809                         }
 810
 811                         if(ds.isSelected()) {
 812                                 ret.push(true);
 813                                 this.selected_count++;
 814                         }
 815                         else {
 816                                 ret.push(false);
 817                                 this.unselected_count++;
 818                         }
 819                 }
 820
 821                 if(this.selected_count === 0 && this.unselected_count !== 0) {
 822                         this.selectAll();
 823                         return this.selected2BooleanArray(array);
 824                 }
 825
 826                 return ret;
 827         }
 828
 829
 830         // ----------------------------------------------------------------------------------------------------------------
 831         // global selection sync
 832
 833         NETDATA.globalSelectionSync = {
 834                 state: null,
 835                 dont_sync_before: 0,
 836                 last_t: 0,
 837                 slaves: [],
 838
 839                 stop: function() {
 840                         if(this.state !== null)
 841                                 this.state.globalSelectionSyncStop();
 842                 },
 843
 844                 delay: function() {
 845                         if(this.state !== null) {
 846                                 this.state.globalSelectionSyncDelay();
 847                         }
 848                 }
 849         };
 850
 851         // ----------------------------------------------------------------------------------------------------------------
 852         // Our state object, where all per-chart values are stored
 853
 854         chartState = function(element) {
 855                 var self = $(element);
 856                 this.element = element;
 857
 858                 // IMPORTANT:
 859                 // all private functions should use 'that', instead of 'this'
 860                 var that = this;
 861
 862                 /* error() - private
 863                  * show an error instead of the chart
 864                  */
 865                 var error = function(msg) {
 866                         that.element.innerHTML = that.id + ': ' + msg;
 867                         that.enabled = false;
 868                         that.current = that.pan;
 869                 }
 870
 871                 // GUID - a unique identifier for the chart
 872                 this.uuid = NETDATA.guid();
 873
 874                 // string - the name of chart
 875                 this.id = self.data('netdata');
 876
 877                 // string - the key for localStorage settings
 878                 this.settings_id = self.data('id') || null;
 879
 880                 // the user given dimensions of the element
 881                 this.width = self.data('width') || NETDATA.chartDefaults.width;
 882                 this.height = self.data('height') || NETDATA.chartDefaults.height;
 883
 884                 if(this.settings_id !== null) {
 885                         this.height = NETDATA.localStorageGet('chart_heights.' + this.settings_id, this.height, function(height) {
 886                                 // this is the callback that will be called
 887                                 // if and when the user resets all localStorage variables
 888                                 // to their defaults
 889
 890                                 resizeChartToHeight(height);
 891                         });
 892                 }
 893
 894                 // string - the netdata server URL, without any path
 895                 this.host = self.data('host') || NETDATA.chartDefaults.host;
 896
 897                 // make sure the host does not end with /
 898                 // all netdata API requests use absolute paths
 899                 while(this.host.slice(-1) === '/')
 900                         this.host = this.host.substring(0, this.host.length - 1);
 901
 902                 // string - the grouping method requested by the user
 903                 this.method = self.data('method') || NETDATA.chartDefaults.method;
 904
 905                 // the time-range requested by the user
 906                 this.after = self.data('after') || NETDATA.chartDefaults.after;
 907                 this.before = self.data('before') || NETDATA.chartDefaults.before;
 908
 909                 // the pixels per point requested by the user
 910                 this.pixels_per_point = self.data('pixels-per-point') || 1;
 911                 this.points = self.data('points') || null;
 912
 913                 // the dimensions requested by the user
 914                 this.dimensions = self.data('dimensions') || null;
 915
 916                 // the chart library requested by the user
 917                 this.library_name = self.data('chart-library') || NETDATA.chartDefaults.library;
 918
 919                 // object - the chart library used
 920                 this.library = null;
 921
 922                 // color management
 923                 this.colors = null;
 924                 this.colors_assigned = {};
 925                 this.colors_available = null;
 926
 927                 // the element already created by the user
 928                 this.element_message = null;
 929
 930                 // the element with the chart
 931                 this.element_chart = null;
 932
 933                 // the element with the legend of the chart (if created by us)
 934                 this.element_legend = null;
 935                 this.element_legend_childs = {
 936                         hidden: null,
 937                         title_date: null,
 938                         title_time: null,
 939                         title_units: null,
 940                         nano: null,
 941                         nano_options: null,
 942                         series: null
 943                 };
 944
 945                 this.chart_url = null;                                          // string - the url to download chart info
 946                 this.chart = null;                                                      // object - the chart as downloaded from the server
 947
 948                 this.title = self.data('title') || null;        // the title of the chart
 949                 this.units = self.data('units') || null;        // the units of the chart dimensions
 950                 this.append_options = self.data('append-options') || null;      // the units of the chart dimensions
 951
 952                 this.validated = false;                                         // boolean - has the chart been validated?
 953                 this.enabled = true;                                            // boolean - is the chart enabled for refresh?
 954                 this.paused = false;                                            // boolean - is the chart paused for any reason?
 955                 this.selected = false;                                          // boolean - is the chart shown a selection?
 956                 this.debug = false;                                                     // boolean - console.log() debug info about this chart
 957
 958                 this.netdata_first = 0;                                         // milliseconds - the first timestamp in netdata
 959                 this.netdata_last = 0;                                          // milliseconds - the last timestamp in netdata
 960                 this.requested_after = null;                            // milliseconds - the timestamp of the request after param
 961                 this.requested_before = null;                           // milliseconds - the timestamp of the request before param
 962                 this.requested_padding = null;
 963                 this.view_after = 0;
 964                 this.view_before = 0;
 965
 966                 this.auto = {
 967                         name: 'auto',
 968                         autorefresh: true,
 969                         force_update_at: 0, // the timestamp to force the update at
 970                         force_before_ms: null,
 971                         force_after_ms: null
 972                 };
 973                 this.pan = {
 974                         name: 'pan',
 975                         autorefresh: false,
 976                         force_update_at: 0, // the timestamp to force the update at
 977                         force_before_ms: null,
 978                         force_after_ms: null
 979                 };
 980                 this.zoom = {
 981                         name: 'zoom',
 982                         autorefresh: false,
 983                         force_update_at: 0, // the timestamp to force the update at
 984                         force_before_ms: null,
 985                         force_after_ms: null
 986                 };
 987
 988                 // this is a pointer to one of the sub-classes below
 989                 // auto, pan, zoom
 990                 this.current = this.auto;
 991
 992                 // check the requested library is available
 993                 // we don't initialize it here - it will be initialized when
 994                 // this chart will be first used
 995                 if(typeof NETDATA.chartLibraries[that.library_name] === 'undefined') {
 996                         NETDATA.error(402, that.library_name);
 997                         error('chart library "' + that.library_name + '" is not found');
 998                         return;
 999                 }
1000                 else if(NETDATA.chartLibraries[that.library_name].enabled === false) {
1001                         NETDATA.error(403, that.library_name);
1002                         error('chart library "' + that.library_name + '" is not enabled');
1003                         return;
1004                 }
1005                 else
1006                         that.library = NETDATA.chartLibraries[that.library_name];
1007
1008                 // milliseconds - the time the last refresh took
1009                 this.refresh_dt_ms = 0;
1010
1011                 // if we need to report the rendering speed
1012                 // find the element that needs to be updated
1013                 var refresh_dt_element_name = self.data('dt-element-name') || null;     // string - the element to print refresh_dt_ms
1014
1015                 if(refresh_dt_element_name !== null)
1016                         this.refresh_dt_element = document.getElementById(refresh_dt_element_name) || null;
1017                 else
1018                         this.refresh_dt_element = null;
1019
1020                 this.dimensions_visibility = new dimensionsVisibility(this);
1021
1022                 this._updating = false;
1023
1024                 // ============================================================================================================
1025                 // PRIVATE FUNCTIONS
1026
1027                 var createDOM = function() {
1028                         if(that.enabled === false) return;
1029
1030                         if(that.element_message !== null) that.element_message.innerHTML = '';
1031                         if(that.element_legend !== null) that.element_legend.innerHTML = '';
1032                         if(that.element_chart !== null) that.element_chart.innerHTML = '';
1033
1034                         that.element.innerHTML = '';
1035
1036                         that.element_message = document.createElement('div');
1037                         that.element_message.className = ' netdata-message hidden';
1038                         that.element.appendChild(that.element_message);
1039
1040                         that.element_chart = document.createElement('div');
1041                         that.element_chart.id = that.library_name + '-' + that.uuid + '-chart';
1042                         that.element.appendChild(that.element_chart);
1043
1044                         if(that.hasLegend() === true) {
1045                                 that.element.className = "netdata-container-with-legend";
1046                                 that.element_chart.className = 'netdata-chart-with-legend-right netdata-' + that.library_name + '-chart-with-legend-right';
1047
1048                                 that.element_legend = document.createElement('div');
1049                                 that.element_legend.className = 'netdata-chart-legend netdata-' + that.library_name + '-legend';
1050                                 that.element.appendChild(that.element_legend);
1051                         }
1052                         else {
1053                                 that.element.className = "netdata-container";
1054                                 that.element_chart.className = ' netdata-chart netdata-' + that.library_name + '-chart';
1055
1056                                 that.element_legend = null;
1057                         }
1058                         that.element_legend_childs.series = null;
1059
1060                         if(typeof(that.width) === 'string')
1061                                 $(that.element).css('width', that.width);
1062                         else if(typeof(that.width) === 'number')
1063                                 $(that.element).css('width', that.width + 'px');
1064
1065                         if(typeof(that.library.aspect_ratio) === 'undefined') {
1066                                 if(typeof(that.height) === 'string')
1067                                         $(that.element).css('height', that.height);
1068                                 else if(typeof(that.height) === 'number')
1069                                         $(that.element).css('height', that.height + 'px');
1070                         }
1071                         else {
1072                                 var w = that.element.offsetWidth;
1073                                 if(w === null || w === 0) {
1074                                         // the div is hidden
1075                                         // this is resize the chart when next viewed
1076                                         that.tm.last_resized = 0;
1077                                 }
1078                                 else
1079                                         $(that.element).css('height', (that.element.offsetWidth * that.library.aspect_ratio / 100).toString() + 'px');
1080                         }
1081
1082                         if(NETDATA.chartDefaults.min_width !== null)
1083                                 $(that.element).css('min-width', NETDATA.chartDefaults.min_width);
1084
1085                         that.tm.last_dom_created = new Date().getTime();
1086
1087                         showLoading();
1088                 }
1089
1090                 /* init() private
1091                  * initialize state viariables
1092                  * destroy all (possibly) created state elements
1093                  * create the basic DOM for a chart
1094                  */
1095                 var init = function() {
1096                         if(that.enabled === false) return;
1097
1098                         that.paused = false;
1099                         that.selected = false;
1100
1101                         that.chart_created = false;                     // boolean - is the library.create() been called?
1102                         that.updates_counter = 0;                       // numeric - the number of refreshes made so far
1103                         that.updates_since_last_unhide = 0;     // numeric - the number of refreshes made since the last time the chart was unhidden
1104                         that.updates_since_last_creation = 0; // numeric - the number of refreshes made since the last time the chart was created
1105
1106                         that.tm = {
1107                                 last_initialized: 0,            // milliseconds - the timestamp it was last initialized
1108                                 last_dom_created: 0,            // milliseconds - the timestamp its DOM was last created
1109                                 last_mode_switch: 0,            // milliseconds - the timestamp it switched modes
1110
1111                                 last_info_downloaded: 0,        // milliseconds - the timestamp we downloaded the chart
1112                                 last_updated: 0,                        // the timestamp the chart last updated with data
1113                                 pan_and_zoom_seq: 0,            // the sequence number of the global synchronization
1114                                                                                         // between chart.
1115                                                                                         // Used with NETDATA.globalPanAndZoom.seq
1116                                 last_visible_check: 0,          // the time we last checked if it is visible
1117                                 last_resized: 0,                        // the time the chart was resized
1118                                 last_hidden: 0,                         // the time the chart was hidden
1119                                 last_unhidden: 0,                       // the time the chart was unhidden
1120                                 last_autorefreshed: 0           // the time the chart was last refreshed
1121                         },
1122
1123                         that.data = null;                               // the last data as downloaded from the netdata server
1124                         that.data_url = 'invalid://';   // string - the last url used to update the chart
1125                         that.data_points = 0;                   // number - the number of points returned from netdata
1126                         that.data_after = 0;                    // milliseconds - the first timestamp of the data
1127                         that.data_before = 0;                   // milliseconds - the last timestamp of the data
1128                         that.data_update_every = 0;             // milliseconds - the frequency to update the data
1129
1130                         that.tm.last_initialized = new Date().getTime();
1131                         createDOM();
1132
1133                         that.setMode('auto');
1134                 }
1135
1136                 var maxMessageFontSize = function() {
1137                         // normally we want a font size, as tall as the element
1138                         var h = that.element_message.clientHeight;
1139
1140                         // but give it some air, 20% let's say, or 5 pixels min
1141                         var lost = Math.max(h * 0.2, 5);
1142                         h -= lost;
1143
1144                         // center the text, verically
1145                         var paddingTop = (lost - 5) / 2;
1146
1147                         // but check the width too
1148                         // it should fit 10 characters in it
1149                         var w = that.element_message.clientWidth / 10;
1150                         if(h > w) {
1151                                 paddingTop += (h - w) / 2;
1152                                 h = w;
1153                         }
1154
1155                         // and don't make it too huge
1156                         // 5% of the screen size is good
1157                         if(h > screen.height / 20) {
1158                                 paddingTop += (h - (screen.height / 20)) / 2;
1159                                 h = screen.height / 20;
1160                         }
1161
1162                         // set it
1163                         that.element_message.style.fontSize = h.toString() + 'px';
1164                         that.element_message.style.paddingTop = paddingTop.toString() + 'px';
1165                 }
1166
1167                 var showMessage = function(msg) {
1168                         that.element_message.className = 'netdata-message';
1169                         that.element_message.innerHTML = msg;
1170                         this.element_message.style.fontSize = 'x-small';
1171                         that.element_message.style.paddingTop = '0px';
1172                         that.___messageHidden___ = undefined;
1173                 }
1174
1175                 var showMessageIcon = function(icon) {
1176                         that.element_message.innerHTML = icon;
1177                         that.element_message.className = 'netdata-message icon';
1178                         maxMessageFontSize();
1179                         that.___messageHidden___ = undefined;
1180                 }
1181
1182                 var hideMessage = function() {
1183                         if(typeof that.___messageHidden___ === 'undefined') {
1184                                 that.___messageHidden___ = true;
1185                                 that.element_message.className = 'netdata-message hidden';
1186                         }
1187                 }
1188
1189                 var showRendering = function() {
1190                         var icon;
1191                         if(that.chart !== null) {
1192                                 if(that.chart.chart_type === 'line')
1193                                         icon = '<i class="fa fa-line-chart"></i>';
1194                                 else
1195                                         icon = '<i class="fa fa-area-chart"></i>';
1196                         }
1197                         else
1198                                 icon = '<i class="fa fa-area-chart"></i>';
1199
1200                         showMessageIcon(icon + ' netdata');
1201                 }
1202
1203                 var showLoading = function() {
1204                         if(that.chart_created === false) {
1205                                 showMessageIcon('<i class="fa fa-refresh"></i> netdata');
1206                                 return true;
1207                         }
1208                         return false;
1209                 }
1210
1211                 var isHidden = function() {
1212                         if(typeof that.___chartIsHidden___ !== 'undefined')
1213                                 return true;
1214
1215                         return false;
1216                 }
1217
1218                 // hide the chart, when it is not visible - called from isVisible()
1219                 var hideChart = function() {
1220                         // hide it, if it is not already hidden
1221                         if(isHidden() === true) return;
1222
1223                         if(that.chart_created === true) {
1224                                 // we should destroy it
1225                                 if(NETDATA.options.current.destroy_on_hide === true) {
1226                                         init();
1227                                 }
1228                                 else {
1229                                         showRendering();
1230                                         that.element_chart.style.display = 'none';
1231                                         if(that.element_legend !== null) that.element_legend.style.display = 'none';
1232                                         that.tm.last_hidden = new Date().getTime();
1233                                 }
1234                         }
1235
1236                         that.___chartIsHidden___ = true;
1237                 }
1238
1239                 // unhide the chart, when it is visible - called from isVisible()
1240                 var unhideChart = function() {
1241                         if(isHidden() === false) return;
1242
1243                         that.___chartIsHidden___ = undefined;
1244                         that.updates_since_last_unhide = 0;
1245
1246                         if(that.chart_created === false) {
1247                                 // we need to re-initialize it, to show our background
1248                                 // logo in bootstrap tabs, until the chart loads
1249                                 init();
1250                         }
1251                         else {
1252                                 that.tm.last_unhidden = new Date().getTime();
1253                                 that.element_chart.style.display = '';
1254                                 if(that.element_legend !== null) that.element_legend.style.display = '';
1255                                 resizeChart();
1256                                 hideMessage();
1257                         }
1258                 }
1259
1260                 var canBeRendered = function() {
1261                         if(isHidden() === true || that.isVisible(true) === false)
1262                                 return false;
1263
1264                         return true;
1265                 }
1266
1267                 // https://github.com/petkaantonov/bluebird/wiki/Optimization-killers
1268                 var callChartLibraryUpdateSafely = function(data) {
1269                         var status;
1270
1271                         if(canBeRendered() === false)
1272                                 return false;
1273
1274                         if(NETDATA.options.debug.chart_errors === true)
1275                                 status = that.library.update(that, data);
1276                         else {
1277                                 try {
1278                                         status = that.library.update(that, data);
1279                                 }
1280                                 catch(err) {
1281                                         status = false;
1282                                 }
1283                         }
1284
1285                         if(status === false) {
1286                                 error('chart failed to be updated as ' + that.library_name);
1287                                 return false;
1288                         }
1289
1290                         return true;
1291                 }
1292
1293                 // https://github.com/petkaantonov/bluebird/wiki/Optimization-killers
1294                 var callChartLibraryCreateSafely = function(data) {
1295                         var status;
1296
1297                         if(canBeRendered() === false)
1298                                 return false;
1299
1300                         if(NETDATA.options.debug.chart_errors === true)
1301                                 status = that.library.create(that, data);
1302                         else {
1303                                 try {
1304                                         status = that.library.create(that, data);
1305                                 }
1306                                 catch(err) {
1307                                         status = false;
1308                                 }
1309                         }
1310
1311                         if(status === false) {
1312                                 error('chart failed to be created as ' + that.library_name);
1313                                 return false;
1314                         }
1315
1316                         that.chart_created = true;
1317                         that.updates_since_last_creation = 0;
1318                         return true;
1319                 }
1320
1321                 // ----------------------------------------------------------------------------------------------------------------
1322                 // Chart Resize
1323
1324                 // resizeChart() - private
1325                 // to be called just before the chart library to make sure that
1326                 // a properly sized dom is available
1327                 var resizeChart = function() {
1328                         if(that.isVisible() === true && that.tm.last_resized < NETDATA.options.last_resized) {
1329                                 if(that.chart_created === false) return;
1330
1331                                 if(that.needsRecreation()) {
1332                                         init();
1333                                 }
1334                                 else if(typeof that.library.resize === 'function') {
1335                                         that.library.resize(that);
1336
1337                                         if(that.element_legend_childs.nano !== null && that.element_legend_childs.nano_options !== null)
1338                                                 $(that.element_legend_childs.nano).nanoScroller();
1339
1340                                         maxMessageFontSize();
1341                                 }
1342
1343                                 that.tm.last_resized = new Date().getTime();
1344                         }
1345                 }
1346
1347                 // this is the actual chart resize algorithm
1348                 // it will:
1349                 // - resize the entire container
1350                 // - update the internal states
1351                 // - resize the chart as the div changes height
1352                 // - update the scrollbar of the legend
1353                 var resizeChartToHeight = function(h) {
1354                         // console.log(h);
1355                         that.element.style.height = h;
1356
1357                         if(that.settings_id !== null)
1358                                 NETDATA.localStorageSet('chart_heights.' + that.settings_id, h);
1359
1360                         var now = new Date().getTime();
1361                         NETDATA.options.last_page_scroll = now;
1362                         NETDATA.options.auto_refresher_stop_until = now + NETDATA.options.current.stop_updates_while_resizing;
1363
1364                         // force a resize
1365                         that.tm.last_resized = 0;
1366                         resizeChart();
1367                 };
1368
1369                 this.resizeHandler = function(e) {
1370                         e.preventDefault();
1371
1372                         if(typeof this.event_resize === 'undefined'
1373                                 || this.event_resize.chart_original_w === 'undefined'
1374                                 || this.event_resize.chart_original_h === 'undefined')
1375                                 this.event_resize = {
1376                                         chart_original_w: this.element.clientWidth,
1377                                         chart_original_h: this.element.clientHeight,
1378                                         last: 0
1379                                 };
1380
1381                         if(e.type === 'touchstart') {
1382                                 this.event_resize.mouse_start_x = e.touches.item(0).pageX;
1383                                 this.event_resize.mouse_start_y = e.touches.item(0).pageY;
1384                         }
1385                         else {
1386                                 this.event_resize.mouse_start_x = e.clientX;
1387                                 this.event_resize.mouse_start_y = e.clientY;
1388                         }
1389
1390                         this.event_resize.chart_start_w = this.element.clientWidth;
1391                         this.event_resize.chart_start_h = this.element.clientHeight;
1392                         this.event_resize.chart_last_w = this.element.clientWidth;
1393                         this.event_resize.chart_last_h = this.element.clientHeight;
1394
1395                         var now = new Date().getTime();
1396                         if(now - this.event_resize.last <= NETDATA.options.current.double_click_speed) {
1397                                 // double click / double tap event
1398
1399                                 // the optimal height of the chart
1400                                 // showing the entire legend
1401                                 var optimal = this.event_resize.chart_last_h
1402                                                 + this.element_legend_childs.content.scrollHeight
1403                                                 - this.element_legend_childs.content.clientHeight;
1404
1405                                 // if we are not optimal, be optimal
1406                                 if(this.event_resize.chart_last_h != optimal)
1407                                         resizeChartToHeight(optimal.toString() + 'px');
1408
1409                                 // else if we do not have the original height
1410                                 // reset to the original height
1411                                 else if(this.event_resize.chart_last_h != this.event_resize.chart_original_h)
1412                                         resizeChartToHeight(this.event_resize.chart_original_h.toString() + 'px');
1413                         }
1414                         else {
1415                                 this.event_resize.last = now;
1416
1417                                 // process movement event
1418                                 document.onmousemove =
1419                                 document.ontouchmove =
1420                                 this.element_legend_childs.resize_handler.onmousemove =
1421                                 this.element_legend_childs.resize_handler.ontouchmove =
1422                                         function(e) {
1423                                                 var y = null;
1424
1425                                                 switch(e.type) {
1426                                                         case 'mousemove': y = e.clientY; break;
1427                                                         case 'touchmove': y = e.touches.item(e.touches - 1).pageY; break;
1428                                                 }
1429
1430                                                 if(y !== null) {
1431                                                         var     newH = that.event_resize.chart_start_h + y - that.event_resize.mouse_start_y;
1432
1433                                                         if(newH >= 70 && newH !== that.event_resize.chart_last_h) {
1434                                                                 resizeChartToHeight(newH.toString() + 'px');
1435                                                                 that.event_resize.chart_last_h = newH;
1436                                                         }
1437                                                 }
1438                                         };
1439
1440                                 // process end event
1441                                 document.onmouseup =
1442                                 document.ontouchend =
1443                                 this.element_legend_childs.resize_handler.onmouseup =
1444                                 this.element_legend_childs.resize_handler.ontouchend =
1445                                         function(e) {
1446                                                 // remove all the hooks
1447                                                 document.onmouseup =
1448                                                 document.onmousemove =
1449                                                 document.ontouchmove =
1450                                                 document.ontouchend =
1451                                                 that.element_legend_childs.resize_handler.onmousemove =
1452                                                 that.element_legend_childs.resize_handler.ontouchmove =
1453                                                 that.element_legend_childs.resize_handler.onmouseout =
1454                                                 that.element_legend_childs.resize_handler.onmouseup =
1455                                                 that.element_legend_childs.resize_handler.ontouchend =
1456                                                         null;
1457
1458                                                 // allow auto-refreshes
1459                                                 NETDATA.options.auto_refresher_stop_until = 0;
1460                                         };
1461                         }
1462                 }
1463
1464
1465                 var noDataToShow = function() {
1466                         showMessageIcon('<i class="fa fa-warning"></i> empty');
1467                         that.legendUpdateDOM();
1468                         that.tm.last_autorefreshed = new Date().getTime();
1469                         // that.data_update_every = 30 * 1000;
1470                         //that.element_chart.style.display = 'none';
1471                         //if(that.element_legend !== null) that.element_legend.style.display = 'none';
1472                         //that.___chartIsHidden___ = true;
1473                 }
1474
1475                 // ============================================================================================================
1476                 // PUBLIC FUNCTIONS
1477
1478                 this.error = function(msg) {
1479                         error(msg);
1480                 }
1481
1482                 this.setMode = function(m) {
1483                         if(this.current !== null && this.current.name === m) return;
1484
1485                         if(m === 'auto')
1486                                 this.current = this.auto;
1487                         else if(m === 'pan')
1488                                 this.current = this.pan;
1489                         else if(m === 'zoom')
1490                                 this.current = this.zoom;
1491                         else
1492                                 this.current = this.auto;
1493
1494                         this.current.force_update_at = 0;
1495                         this.current.force_before_ms = null;
1496                         this.current.force_after_ms = null;
1497
1498                         this.tm.last_mode_switch = new Date().getTime();
1499                 }
1500
1501                 // ----------------------------------------------------------------------------------------------------------------
1502                 // global selection sync
1503
1504                 // prevent to global selection sync for some time
1505                 this.globalSelectionSyncDelay = function(ms) {
1506                         if(NETDATA.options.current.sync_selection === false)
1507                                 return;
1508
1509                         if(typeof ms === 'number')
1510                                 NETDATA.globalSelectionSync.dont_sync_before = new Date().getTime() + ms;
1511                         else
1512                                 NETDATA.globalSelectionSync.dont_sync_before = new Date().getTime() + NETDATA.options.current.sync_selection_delay;
1513                 }
1514
1515                 // can we globally apply selection sync?
1516                 this.globalSelectionSyncAbility = function() {
1517                         if(NETDATA.options.current.sync_selection === false)
1518                                 return false;
1519
1520                         if(NETDATA.globalSelectionSync.dont_sync_before > new Date().getTime())
1521                                 return false;
1522
1523                         return true;
1524                 }
1525
1526                 this.globalSelectionSyncIsMaster = function() {
1527                         if(NETDATA.globalSelectionSync.state === this)
1528                                 return true;
1529                         else
1530                                 return false;
1531                 }
1532
1533                 // this chart is the master of the global selection sync
1534                 this.globalSelectionSyncBeMaster = function() {
1535                         // am I the master?
1536                         if(this.globalSelectionSyncIsMaster()) {
1537                                 if(this.debug === true)
1538                                         this.log('sync: I am the master already.');
1539
1540                                 return;
1541                         }
1542
1543                         if(NETDATA.globalSelectionSync.state) {
1544                                 if(this.debug === true)
1545                                         this.log('sync: I am not the sync master. Resetting global sync.');
1546
1547                                 this.globalSelectionSyncStop();
1548                         }
1549
1550                         // become the master
1551                         if(this.debug === true)
1552                                 this.log('sync: becoming sync master.');
1553
1554                         this.selected = true;
1555                         NETDATA.globalSelectionSync.state = this;
1556
1557                         // find the all slaves
1558                         var targets = NETDATA.options.targets;
1559                         var len = targets.length;
1560                         while(len--) {
1561                                 st = targets[len];
1562
1563                                 if(st === this) {
1564                                         if(this.debug === true)
1565                                                 st.log('sync: not adding me to sync');
1566                                 }
1567                                 else if(st.globalSelectionSyncIsEligible()) {
1568                                         if(this.debug === true)
1569                                                 st.log('sync: adding to sync as slave');
1570
1571                                         st.globalSelectionSyncBeSlave();
1572                                 }
1573                         }
1574
1575                         // this.globalSelectionSyncDelay(100);
1576                 }
1577
1578                 // can the chart participate to the global selection sync as a slave?
1579                 this.globalSelectionSyncIsEligible = function() {
1580                         if(this.enabled === true
1581                                 && this.library !== null
1582                                 && typeof this.library.setSelection === 'function'
1583                                 && this.isVisible() === true
1584                                 && this.chart_created === true)
1585                                 return true;
1586
1587                         return false;
1588                 }
1589
1590                 // this chart becomes a slave of the global selection sync
1591                 this.globalSelectionSyncBeSlave = function() {
1592                         if(NETDATA.globalSelectionSync.state !== this)
1593                                 NETDATA.globalSelectionSync.slaves.push(this);
1594                 }
1595
1596                 // sync all the visible charts to the given time
1597                 // this is to be called from the chart libraries
1598                 this.globalSelectionSync = function(t) {
1599                         if(this.globalSelectionSyncAbility() === false) {
1600                                 if(this.debug === true)
1601                                         this.log('sync: cannot sync (yet?).');
1602
1603                                 return;
1604                         }
1605
1606                         if(this.globalSelectionSyncIsMaster() === false) {
1607                                 if(this.debug === true)
1608                                         this.log('sync: trying to be sync master.');
1609
1610                                 this.globalSelectionSyncBeMaster();
1611
1612                                 if(this.globalSelectionSyncAbility() === false) {
1613                                         if(this.debug === true)
1614                                                 this.log('sync: cannot sync (yet?).');
1615
1616                                         return;
1617                                 }
1618                         }
1619
1620                         NETDATA.globalSelectionSync.last_t = t;
1621                         $.each(NETDATA.globalSelectionSync.slaves, function(i, st) {
1622                                 st.setSelection(t);
1623                         });
1624                 }
1625
1626                 // stop syncing all charts to the given time
1627                 this.globalSelectionSyncStop = function() {
1628                         if(NETDATA.globalSelectionSync.slaves.length) {
1629                                 if(this.debug === true)
1630                                         this.log('sync: cleaning up...');
1631
1632                                 $.each(NETDATA.globalSelectionSync.slaves, function(i, st) {
1633                                         if(st === that) {
1634                                                 if(that.debug === true)
1635                                                         st.log('sync: not adding me to sync stop');
1636                                         }
1637                                         else {
1638                                                 if(that.debug === true)
1639                                                         st.log('sync: removed slave from sync');
1640
1641                                                 st.clearSelection();
1642                                         }
1643                                 });
1644
1645                                 NETDATA.globalSelectionSync.last_t = 0;
1646                                 NETDATA.globalSelectionSync.slaves = [];
1647                                 NETDATA.globalSelectionSync.state = null;
1648                         }
1649
1650                         this.clearSelection();
1651                 }
1652
1653                 this.setSelection = function(t) {
1654                         if(typeof this.library.setSelection === 'function') {
1655                                 if(this.library.setSelection(this, t) === true)
1656                                         this.selected = true;
1657                                 else
1658                                         this.selected = false;
1659                         }
1660                         else this.selected = true;
1661
1662                         if(this.selected === true && this.debug === true)
1663                                 this.log('selection set to ' + t.toString());
1664
1665                         return this.selected;
1666                 }
1667
1668                 this.clearSelection = function() {
1669                         if(this.selected === true) {
1670                                 if(typeof this.library.clearSelection === 'function') {
1671                                         if(this.library.clearSelection(this) === true)
1672                                                 this.selected = false;
1673                                         else
1674                                                 this.selected = true;
1675                                 }
1676                                 else this.selected = false;
1677
1678                                 if(this.selected === false && this.debug === true)
1679                                         this.log('selection cleared');
1680
1681                                 this.legendReset();
1682                         }
1683
1684                         return this.selected;
1685                 }
1686
1687                 // find if a timestamp (ms) is shown in the current chart
1688                 this.timeIsVisible = function(t) {
1689                         if(t >= this.data_after && t <= this.data_before)
1690                                 return true;
1691                         return false;
1692                 },
1693
1694                 this.calculateRowForTime = function(t) {
1695                         if(this.timeIsVisible(t) === false) return -1;
1696                         return Math.floor((t - this.data_after) / this.data_update_every);
1697                 }
1698
1699                 // ----------------------------------------------------------------------------------------------------------------
1700
1701                 // console logging
1702                 this.log = function(msg) {
1703                         console.log(this.id + ' (' + this.library_name + ' ' + this.uuid + '): ' + msg);
1704                 }
1705
1706                 this.pauseChart = function() {
1707                         if(this.paused === false) {
1708                                 if(this.debug === true)
1709                                         this.log('pauseChart()');
1710
1711                                 this.paused = true;
1712                         }
1713                 }
1714
1715                 this.unpauseChart = function() {
1716                         if(this.paused === true) {
1717                                 if(this.debug === true)
1718                                         this.log('unpauseChart()');
1719
1720                                 this.paused = false;
1721                         }
1722                 }
1723
1724                 this.resetChart = function(dont_clear_master, dont_update) {
1725                         if(this.debug === true)
1726                                 this.log('resetChart(' + dont_clear_master + ', ' + dont_update + ') called');
1727
1728                         if(typeof dont_clear_master === 'undefined')
1729                                 dont_clear_master = false;
1730
1731                         if(typeof dont_update === 'undefined')
1732                                 dont_update = false;
1733
1734                         if(dont_clear_master !== true && NETDATA.globalPanAndZoom.isMaster(this) === true) {
1735                                 if(this.debug === true)
1736                                         this.log('resetChart() diverting to clearMaster().');
1737                                 // this will call us back with master === true
1738                                 NETDATA.globalPanAndZoom.clearMaster();
1739                                 return;
1740                         }
1741
1742                         this.clearSelection();
1743
1744                         this.tm.pan_and_zoom_seq = 0;
1745
1746                         this.setMode('auto');
1747                         this.current.force_update_at = 0;
1748                         this.current.force_before_ms = null;
1749                         this.current.force_after_ms = null;
1750                         this.tm.last_autorefreshed = 0;
1751                         this.paused = false;
1752                         this.selected = false;
1753                         this.enabled = true;
1754                         // this.debug = false;
1755
1756                         // do not update the chart here
1757                         // or the chart will flip-flop when it is the master
1758                         // of a selection sync and another chart becomes
1759                         // the new master
1760
1761                         if(dont_update !== true && this.isVisible() === true) {
1762                                 this.updateChart();
1763                         }
1764                 }
1765
1766                 this.updateChartPanOrZoom = function(after, before) {
1767                         var logme = 'updateChartPanOrZoom(' + after + ', ' + before + '): ';
1768                         var ret = true;
1769
1770                         if(this.debug === true)
1771                                 this.log(logme);
1772
1773                         if(before < after) {
1774                                 this.log(logme + 'flipped parameters, rejecting it.');
1775                                 return false;
1776                         }
1777
1778                         if(typeof this.fixed_min_duration === 'undefined')
1779                                 this.fixed_min_duration = Math.round((this.chartWidth() / 30) * this.chart.update_every * 1000);
1780
1781                         var min_duration = this.fixed_min_duration;
1782                         var current_duration = Math.round(this.view_before - this.view_after);
1783
1784                         // round the numbers
1785                         after = Math.round(after);
1786                         before = Math.round(before);
1787
1788                         // align them to update_every
1789                         // stretching them further away
1790                         after -= after % this.data_update_every;
1791                         before += this.data_update_every - (before % this.data_update_every);
1792
1793                         // the final wanted duration
1794                         var wanted_duration = before - after;
1795
1796                         // to allow panning, accept just a point below our minimum
1797                         if((current_duration - this.data_update_every) < min_duration)
1798                                 min_duration = current_duration - this.data_update_every;
1799
1800                         // we do it, but we adjust to minimum size and return false
1801                         // when the wanted size is below the current and the minimum
1802                         // and we zoom
1803                         if(wanted_duration < current_duration && wanted_duration < min_duration) {
1804                                 if(this.debug === true)
1805                                         this.log(logme + 'too small: min_duration: ' + (min_duration / 1000).toString() + ', wanted: ' + (wanted_duration / 1000).toString());
1806
1807                                 min_duration = this.fixed_min_duration;
1808
1809                                 var dt = (min_duration - wanted_duration) / 2;
1810                                 before += dt;
1811                                 after -= dt;
1812                                 wanted_duration = before - after;
1813                                 ret = false;
1814                         }
1815
1816                         var tolerance = this.data_update_every * 2;
1817                         var movement = Math.abs(before - this.view_before);
1818
1819                         if(Math.abs(current_duration - wanted_duration) <= tolerance && movement <= tolerance && ret === true) {
1820                                 if(this.debug === true)
1821                                         this.log(logme + 'REJECTING UPDATE: current/min duration: ' + (current_duration / 1000).toString() + '/' + (this.fixed_min_duration / 1000).toString() + ', wanted duration: ' + (wanted_duration / 1000).toString() + ', duration diff: ' + (Math.round(Math.abs(current_duration - wanted_duration) / 1000)).toString() + ', movement: ' + (movement / 1000).toString() + ', tolerance: ' + (tolerance / 1000).toString() + ', returning: ' + false);
1822                                 return false;
1823                         }
1824
1825                         if(this.current.name === 'auto') {
1826                                 this.log(logme + 'caller called me with mode: ' + this.current.name);
1827                                 this.setMode('pan');
1828                         }
1829
1830                         if(this.debug === true)
1831                                 this.log(logme + 'ACCEPTING UPDATE: current/min duration: ' + (current_duration / 1000).toString() + '/' + (this.fixed_min_duration / 1000).toString() + ', wanted duration: ' + (wanted_duration / 1000).toString() + ', duration diff: ' + (Math.round(Math.abs(current_duration - wanted_duration) / 1000)).toString() + ', movement: ' + (movement / 1000).toString() + ', tolerance: ' + (tolerance / 1000).toString() + ', returning: ' + ret);
1832
1833                         this.current.force_update_at = new Date().getTime() + NETDATA.options.current.pan_and_zoom_delay;
1834                         this.current.force_after_ms = after;
1835                         this.current.force_before_ms = before;
1836                         NETDATA.globalPanAndZoom.setMaster(this, after, before);
1837                         return ret;
1838                 }
1839
1840                 this.legendFormatValue = function(value) {
1841                         if(value === null || value === 'undefined') return '-';
1842                         if(typeof value !== 'number') return value;
1843
1844                         var abs = Math.abs(value);
1845                         if(abs >= 1000) return (Math.round(value)).toLocaleString();
1846                         if(abs >= 100 ) return (Math.round(value * 10) / 10).toLocaleString();
1847                         if(abs >= 1   ) return (Math.round(value * 100) / 100).toLocaleString();
1848                         if(abs >= 0.1 ) return (Math.round(value * 1000) / 1000).toLocaleString();
1849                         return (Math.round(value * 10000) / 10000).toLocaleString();
1850                 }
1851
1852                 this.legendSetLabelValue = function(label, value) {
1853                         var series = this.element_legend_childs.series[label];
1854                         if(typeof series === 'undefined') return;
1855                         if(series.value === null && series.user === null) return;
1856
1857                         // if the value has not changed, skip DOM update
1858                         //if(series.last === value) return;
1859
1860                         var s, r;
1861                         if(typeof value === 'number') {
1862                                 var v = Math.abs(value);
1863                                 s = r = this.legendFormatValue(value);
1864
1865                                 if(typeof series.last === 'number') {
1866                                         if(v > series.last) s += '<i class="fa fa-angle-up" style="width: 8px; text-align: center; overflow: hidden; vertical-align: middle;"></i>';
1867                                         else if(v < series.last) s += '<i class="fa fa-angle-down" style="width: 8px; text-align: center; overflow: hidden; vertical-align: middle;"></i>';
1868                                         else s += '<i class="fa fa-angle-left" style="width: 8px; text-align: center; overflow: hidden; vertical-align: middle;"></i>';
1869                                 }
1870                                 else s += '<i class="fa fa-angle-right" style="width: 8px; text-align: center; overflow: hidden; vertical-align: middle;"></i>';
1871                                 series.last = v;
1872                         }
1873                         else {
1874                                 s = r = value;
1875                                 series.last = value;
1876                         }
1877
1878                         if(series.value !== null) series.value.innerHTML = s;
1879                         if(series.user !== null) series.user.innerHTML = r;
1880                 }
1881
1882                 this.legendSetDate = function(ms) {
1883                         if(typeof ms !== 'number') {
1884                                 this.legendShowUndefined();
1885                                 return;
1886                         }
1887
1888                         var d = new Date(ms);
1889
1890                         if(this.element_legend_childs.title_date)
1891                                 this.element_legend_childs.title_date.innerHTML = d.toLocaleDateString();
1892
1893                         if(this.element_legend_childs.title_time)
1894                                 this.element_legend_childs.title_time.innerHTML = d.toLocaleTimeString();
1895
1896                         if(this.element_legend_childs.title_units)
1897                                 this.element_legend_childs.title_units.innerHTML = this.units;
1898                 }
1899
1900                 this.legendShowUndefined = function() {
1901                         if(this.element_legend_childs.title_date)
1902                                 this.element_legend_childs.title_date.innerHTML = '&nbsp;';
1903
1904                         if(this.element_legend_childs.title_time)
1905                                 this.element_legend_childs.title_time.innerHTML = this.chart.name;
1906
1907                         if(this.element_legend_childs.title_units)
1908                                 this.element_legend_childs.title_units.innerHTML = '&nbsp;';
1909
1910                         if(this.data && this.element_legend_childs.series !== null) {
1911                                 var labels = this.data.dimension_names;
1912                                 var i = labels.length;
1913                                 while(i--) {
1914                                         var label = labels[i];
1915
1916                                         if(typeof label === 'undefined') continue;
1917                                         if(typeof this.element_legend_childs.series[label] === 'undefined') continue;
1918                                         this.legendSetLabelValue(label, null);
1919                                 }
1920                         }
1921                 }
1922
1923                 this.legendShowLatestValues = function() {
1924                         if(this.chart === null) return;
1925                         if(this.selected) return;
1926
1927                         if(this.data === null || this.element_legend_childs.series === null) {
1928                                 this.legendShowUndefined();
1929                                 return;
1930                         }
1931
1932                         var show_undefined = true;
1933                         if(Math.abs(this.netdata_last - this.view_before) <= this.data_update_every)
1934                                 show_undefined = false;
1935
1936                         if(show_undefined) {
1937                                 this.legendShowUndefined();
1938                                 return;
1939                         }
1940
1941                         this.legendSetDate(this.view_before);
1942
1943                         var labels = this.data.dimension_names;
1944                         var i = labels.length;
1945                         while(i--) {
1946                                 var label = labels[i];
1947
1948                                 if(typeof label === 'undefined') continue;
1949                                 if(typeof this.element_legend_childs.series[label] === 'undefined') continue;
1950
1951                                 if(show_undefined)
1952                                         this.legendSetLabelValue(label, null);
1953                                 else
1954                                         this.legendSetLabelValue(label, this.data.view_latest_values[i]);
1955                         }
1956                 }
1957
1958                 this.legendReset = function() {
1959                         this.legendShowLatestValues();
1960                 }
1961
1962                 // this should be called just ONCE per dimension per chart
1963                 this._chartDimensionColor = function(label) {
1964                         if(this.colors === null) this.chartColors();
1965
1966                         if(typeof this.colors_assigned[label] === 'undefined') {
1967                                 if(this.colors_available.length === 0) {
1968                                         for(var i = 0, len = NETDATA.themes.current.colors.length; i < len ; i++)
1969                                                 this.colors_available.push(NETDATA.themes.current.colors[i]);
1970                                 }
1971
1972                                 this.colors_assigned[label] = this.colors_available.shift();
1973
1974                                 if(this.debug === true)
1975                                         this.log('label "' + label + '" got color "' + this.colors_assigned[label]);
1976                         }
1977                         else {
1978                                 if(this.debug === true)
1979                                         this.log('label "' + label + '" already has color "' + this.colors_assigned[label] + '"');
1980                         }
1981
1982                         this.colors.push(this.colors_assigned[label]);
1983                         return this.colors_assigned[label];
1984                 }
1985
1986                 this.chartColors = function() {
1987                         if(this.colors !== null) return this.colors;
1988
1989                         this.colors = new Array();
1990                         this.colors_available = new Array();
1991
1992                         var c = $(this.element).data('colors');
1993                         // this.log('read colors: ' + c);
1994                         if(typeof c !== 'undefined' && c !== null && c.length > 0) {
1995                                 if(typeof c !== 'string') {
1996                                         this.log('invalid color given: ' + c + ' (give a space separated list of colors)');
1997                                 }
1998                                 else {
1999                                         c = c.split(' ');
2000                                         var added = 0;
2001
2002                                         while(added < 20) {
2003                                                 for(var i = 0, len = c.length; i < len ; i++) {
2004                                                         added++;
2005                                                         this.colors_available.push(c[i]);
2006                                                         // this.log('adding color: ' + c[i]);
2007                                                 }
2008                                         }
2009                                 }
2010                         }
2011
2012                         // push all the standard colors too
2013                         for(var i = 0, len = NETDATA.themes.current.colors.length; i < len ; i++)
2014                                 this.colors_available.push(NETDATA.themes.current.colors[i]);
2015
2016                         return this.colors;
2017                 }
2018
2019                 this.legendUpdateDOM = function() {
2020                         var needed = false;
2021
2022                         // check that the legend DOM is up to date for the downloaded dimensions
2023                         if(typeof this.element_legend_childs.series !== 'object' || this.element_legend_childs.series === null) {
2024                                 // this.log('the legend does not have any series - requesting legend update');
2025                                 needed = true;
2026                         }
2027                         else if(this.data === null) {
2028                                 // this.log('the chart does not have any data - requesting legend update');
2029                                 needed = true;
2030                         }
2031                         else if(typeof this.element_legend_childs.series.labels_key === 'undefined') {
2032                                 needed = true;
2033                         }
2034                         else {
2035                                 var labels = this.data.dimension_names.toString();
2036                                 if(labels !== this.element_legend_childs.series.labels_key) {
2037                                         needed = true;
2038
2039                                         if(this.debug === true)
2040                                                 this.log('NEW LABELS: "' + labels + '" NOT EQUAL OLD LABELS: "' + this.element_legend_childs.series.labels_key + '"');
2041                                 }
2042                         }
2043
2044                         if(needed === false) {
2045                                 // make sure colors available
2046                                 this.chartColors();
2047
2048                                 // do we have to update the current values?
2049                                 // we do this, only when the visible chart is current
2050                                 if(Math.abs(this.netdata_last - this.view_before) <= this.data_update_every) {
2051                                         if(this.debug === true)
2052                                                 this.log('chart is in latest position... updating values on legend...');
2053
2054                                         //var labels = this.data.dimension_names;
2055                                         //var i = labels.length;
2056                                         //while(i--)
2057                                         //      this.legendSetLabelValue(labels[i], this.data.latest_values[i]);
2058                                 }
2059                                 return;
2060                         }
2061                         if(this.colors === null) {
2062                                 // this is the first time we update the chart
2063                                 // let's assign colors to all dimensions
2064                                 if(this.library.track_colors() === true)
2065                                         for(var dim in this.chart.dimensions)
2066                                                 this._chartDimensionColor(this.chart.dimensions[dim].name);
2067                         }
2068                         // we will re-generate the colors for the chart
2069                         // based on the selected dimensions
2070                         this.colors = null;
2071
2072                         if(this.debug === true)
2073                                 this.log('updating Legend DOM');
2074
2075                         // mark all dimensions as invalid
2076                         this.dimensions_visibility.invalidateAll();
2077
2078                         var genLabel = function(state, parent, name, count) {
2079                                 var color = state._chartDimensionColor(name);
2080
2081                                 var user_element = null;
2082                                 var user_id = self.data('show-value-of-' + name + '-at') || null;
2083                                 if(user_id !== null) {
2084                                         user_element = document.getElementById(user_id) || null;
2085                                         if(user_element === null)
2086                                                 me.log('Cannot find element with id: ' + user_id);
2087                                 }
2088
2089                                 state.element_legend_childs.series[name] = {
2090                                         name: document.createElement('span'),
2091                                         value: document.createElement('span'),
2092                                         user: user_element,
2093                                         last: null
2094                                 };
2095
2096                                 var label = state.element_legend_childs.series[name];
2097
2098                                 // create the dimension visibility tracking for this label
2099                                 state.dimensions_visibility.dimensionAdd(name, label.name, label.value, color);
2100
2101                                 var rgb = NETDATA.colorHex2Rgb(color);
2102                                 label.name.innerHTML = '<table class="netdata-legend-name-table-'
2103                                         + state.chart.chart_type
2104                                         + '" style="background-color: '
2105                                         + 'rgba(' + rgb.r + ',' + rgb.g + ',' + rgb.b + ',' + NETDATA.options.current['color_fill_opacity_' + state.chart.chart_type] + ')'
2106                                         + '"><tr class="netdata-legend-name-tr"><td class="netdata-legend-name-td"></td></tr></table>'
2107
2108                                 var text = document.createTextNode(' ' + name);
2109                                 label.name.appendChild(text);
2110
2111                                 if(count > 0)
2112                                         parent.appendChild(document.createElement('br'));
2113
2114                                 parent.appendChild(label.name);
2115                                 parent.appendChild(label.value);
2116                         };
2117
2118                         var content = document.createElement('div');
2119
2120                         if(this.hasLegend()) {
2121                                 this.element_legend_childs = {
2122                                         content: content,
2123                                         resize_handler: document.createElement('div'),
2124                                         toolbox: document.createElement('div'),
2125                                         toolbox_left: document.createElement('div'),
2126                                         toolbox_right: document.createElement('div'),
2127                                         toolbox_reset: document.createElement('div'),
2128                                         toolbox_zoomin: document.createElement('div'),
2129                                         toolbox_zoomout: document.createElement('div'),
2130                                         toolbox_volume: document.createElement('div'),
2131                                         title_date: document.createElement('span'),
2132                                         title_time: document.createElement('span'),
2133                                         title_units: document.createElement('span'),
2134                                         nano: document.createElement('div'),
2135                                         nano_options: {
2136                                                 paneClass: 'netdata-legend-series-pane',
2137                                                 sliderClass: 'netdata-legend-series-slider',
2138                                                 contentClass: 'netdata-legend-series-content',
2139                                                 enabledClass: '__enabled',
2140                                                 flashedClass: '__flashed',
2141                                                 activeClass: '__active',
2142                                                 tabIndex: -1,
2143                                                 alwaysVisible: true,
2144                                                 sliderMinHeight: 10
2145                                         },
2146                                         series: {}
2147                                 };
2148
2149                                 this.element_legend.innerHTML = '';
2150
2151                                 if(this.library.toolboxPanAndZoom !== null) {
2152                                         this.element_legend_childs.toolbox.className += ' netdata-legend-toolbox';
2153                                         this.element.appendChild(this.element_legend_childs.toolbox);
2154
2155                                         this.element_legend_childs.toolbox_left.className += ' netdata-legend-toolbox-button';
2156                                         this.element_legend_childs.toolbox_left.innerHTML = '<i class="fa fa-backward"></i>';
2157                                         this.element_legend_childs.toolbox.appendChild(this.element_legend_childs.toolbox_left);
2158                                         this.element_legend_childs.toolbox_left.onclick = function(e) {
2159                                                 e.preventDefault();
2160                                                 var dt = (that.view_before - that.view_after) * NETDATA.options.current.pan_and_zoom_step;
2161                                                 var before = that.view_before - dt;
2162                                                 var after = that.view_after - dt;
2163                                                 if(after >= that.netdata_first)
2164                                                         that.library.toolboxPanAndZoom(that, after, before);
2165                                         }
2166                                         if(NETDATA.options.current.show_help === true)
2167                                                 $(this.element_legend_childs.toolbox_left).popover({
2168                                                 container: "body",
2169                                                 animation: false,
2170                                                 html: true,
2171                                                 trigger: 'hover',
2172                                                 placement: 'bottom',
2173                                                 delay: 100,
2174                                                 title: 'Pan Left',
2175                                                 content: 'Pan the chart to the left. You can also <b>drag it</b> with your mouse or your finger (on touch devices).<br/><small>Help, can be disabled from the settings.</small>'
2176                                         });
2177
2178
2179                                         this.element_legend_childs.toolbox_reset.className += ' netdata-legend-toolbox-button';
2180                                         this.element_legend_childs.toolbox_reset.innerHTML = '<i class="fa fa-play"></i>';
2181                                         this.element_legend_childs.toolbox.appendChild(this.element_legend_childs.toolbox_reset);
2182                                         this.element_legend_childs.toolbox_reset.onclick = function(e) {
2183                                                 e.preventDefault();
2184                                                 NETDATA.resetAllCharts(that);
2185                                         }
2186                                         if(NETDATA.options.current.show_help === true)
2187                                                 $(this.element_legend_childs.toolbox_reset).popover({
2188                                                 container: "body",
2189                                                 animation: false,
2190                                                 html: true,
2191                                                 trigger: 'hover',
2192                                                 placement: 'bottom',
2193                                                 delay: 100,
2194                                                 title: 'Chart Reset',
2195                                                 content: 'Reset all the charts to their default auto-refreshing state. You can also <b>double click</b> the chart contents with your mouse or your finger (on touch devices).<br/><small>Help, can be disabled from the settings.</small>'
2196                                         });
2197
2198                                         this.element_legend_childs.toolbox_right.className += ' netdata-legend-toolbox-button';
2199                                         this.element_legend_childs.toolbox_right.innerHTML = '<i class="fa fa-forward"></i>';
2200                                         this.element_legend_childs.toolbox.appendChild(this.element_legend_childs.toolbox_right);
2201                                         this.element_legend_childs.toolbox_right.onclick = function(e) {
2202                                                 e.preventDefault();
2203                                                 var dt = (that.view_before - that.view_after) * NETDATA.options.current.pan_and_zoom_step;
2204                                                 var before = that.view_before + dt;
2205                                                 var after = that.view_after + dt;
2206                                                 if(before <= that.netdata_last)
2207                                                         that.library.toolboxPanAndZoom(that, after, before);
2208                                         }
2209                                         if(NETDATA.options.current.show_help === true)
2210                                                 $(this.element_legend_childs.toolbox_right).popover({
2211                                                 container: "body",
2212                                                 animation: false,
2213                                                 html: true,
2214                                                 trigger: 'hover',
2215                                                 placement: 'bottom',
2216                                                 delay: 100,
2217                                                 title: 'Pan Right',
2218                                                 content: 'Pan the chart to the right. You can also <b>drag it</b> with your mouse or your finger (on touch devices).<br/><small>Help, can be disabled from the settings.</small>'
2219                                         });
2220
2221
2222                                         this.element_legend_childs.toolbox_zoomin.className += ' netdata-legend-toolbox-button';
2223                                         this.element_legend_childs.toolbox_zoomin.innerHTML = '<i class="fa fa-plus"></i>';
2224                                         this.element_legend_childs.toolbox.appendChild(this.element_legend_childs.toolbox_zoomin);
2225                                         this.element_legend_childs.toolbox_zoomin.onclick = function(e) {
2226                                                 e.preventDefault();
2227                                                 var dt = (that.view_before - that.view_after) * NETDATA.options.current.pan_and_zoom_step;
2228                                                 var before = that.view_before - dt;
2229                                                 var after = that.view_after + dt;
2230                                                 that.library.toolboxPanAndZoom(that, after, before);
2231                                         }
2232                                         if(NETDATA.options.current.show_help === true)
2233                                                 $(this.element_legend_childs.toolbox_zoomin).popover({
2234                                                 container: "body",
2235                                                 animation: false,
2236                                                 html: true,
2237                                                 trigger: 'hover',
2238                                                 placement: 'bottom',
2239                                                 delay: 100,
2240                                                 title: 'Chart Zoom In',
2241                                                 content: 'Zoom in the chart. On Chrome and Opera, you can also press the SHIFT or the ALT keys and then use the mouse wheel to zoom in or out.<br/><small>Help, can be disabled from the settings.</small>'
2242                                         });
2243
2244                                         this.element_legend_childs.toolbox_zoomout.className += ' netdata-legend-toolbox-button';
2245                                         this.element_legend_childs.toolbox_zoomout.innerHTML = '<i class="fa fa-minus"></i>';
2246                                         this.element_legend_childs.toolbox.appendChild(this.element_legend_childs.toolbox_zoomout);
2247                                         this.element_legend_childs.toolbox_zoomout.onclick = function(e) {
2248                                                 e.preventDefault();
2249                                                 var dt = (that.view_before - that.view_after) * NETDATA.options.current.pan_and_zoom_step;
2250                                                 var before = that.view_before + dt;
2251                                                 var after = that.view_after - dt;
2252
2253                                                 that.library.toolboxPanAndZoom(that, after, before);
2254                                         }
2255                                         if(NETDATA.options.current.show_help === true)
2256                                                 $(this.element_legend_childs.toolbox_zoomout).popover({
2257                                                 container: "body",
2258                                                 animation: false,
2259                                                 html: true,
2260                                                 trigger: 'hover',
2261                                                 placement: 'bottom',
2262                                                 delay: 100,
2263                                                 title: 'Chart Zoom Out',
2264                                                 content: 'Zoom out the chart. On Chrome and Opera, you can also press the SHIFT or the ALT keys and then use the mouse wheel to zoom in or out.<br/><small>Help, can be disabled from the settings.</small>'
2265                                         });
2266
2267                                         //this.element_legend_childs.toolbox_volume.className += ' netdata-legend-toolbox-button';
2268                                         //this.element_legend_childs.toolbox_volume.innerHTML = '<i class="fa fa-sort-amount-desc"></i>';
2269                                         //this.element_legend_childs.toolbox_volume.title = 'Visible Volume';
2270                                         //this.element_legend_childs.toolbox.appendChild(this.element_legend_childs.toolbox_volume);
2271                                         //this.element_legend_childs.toolbox_volume.onclick = function(e) {
2272                                                 //e.preventDefault();
2273                                                 //alert('clicked toolbox_volume on ' + that.id);
2274                                         //}
2275                                 }
2276                                 else {
2277                                         this.element_legend_childs.toolbox = null;
2278                                         this.element_legend_childs.toolbox_left = null;
2279                                         this.element_legend_childs.toolbox_reset = null;
2280                                         this.element_legend_childs.toolbox_right = null;
2281                                         this.element_legend_childs.toolbox_zoomin = null;
2282                                         this.element_legend_childs.toolbox_zoomout = null;
2283                                         this.element_legend_childs.toolbox_volume = null;
2284                                 }
2285
2286                                 this.element_legend_childs.resize_handler.className += " netdata-legend-resize-handler";
2287                                 this.element_legend_childs.resize_handler.innerHTML = '<i class="fa fa-chevron-up"></i><i class="fa fa-chevron-down"></i>';
2288                                 this.element.appendChild(this.element_legend_childs.resize_handler);
2289                                 if(NETDATA.options.current.show_help === true)
2290                                         $(this.element_legend_childs.resize_handler).popover({
2291                                         container: "body",
2292                                         animation: false,
2293                                         html: true,
2294                                         trigger: 'hover',
2295                                         placement: 'bottom',
2296                                         delay: 100,
2297                                         title: 'Chart Resize',
2298                                         content: 'Drag this point with your mouse or your finger (on touch devices), to resize the chart vertically. You can also <b>double click it</b> or <b>double tap it</b> to reset between 2 states: the default and the one that fits all the values.<br/><small>Help, can be disabled from the settings.</small>'
2299                                 });
2300
2301                                 // mousedown event
2302                                 this.element_legend_childs.resize_handler.onmousedown =
2303                                         function(e) {
2304                                                 that.resizeHandler(e);
2305                                         };
2306
2307                                 // touchstart event
2308                                 this.element_legend_childs.resize_handler.addEventListener('touchstart', function(e) {
2309                                         that.resizeHandler(e);
2310                                 }, false);
2311
2312                                 this.element_legend_childs.title_date.className += " netdata-legend-title-date";
2313                                 this.element_legend.appendChild(this.element_legend_childs.title_date);
2314
2315                                 this.element_legend.appendChild(document.createElement('br'));
2316
2317                                 this.element_legend_childs.title_time.className += " netdata-legend-title-time";
2318                                 this.element_legend.appendChild(this.element_legend_childs.title_time);
2319
2320                                 this.element_legend.appendChild(document.createElement('br'));
2321
2322                                 this.element_legend_childs.title_units.className += " netdata-legend-title-units";
2323                                 this.element_legend.appendChild(this.element_legend_childs.title_units);
2324
2325                                 this.element_legend.appendChild(document.createElement('br'));
2326
2327                                 this.element_legend_childs.nano.className = 'netdata-legend-series';
2328                                 this.element_legend.appendChild(this.element_legend_childs.nano);
2329
2330                                 content.className = 'netdata-legend-series-content';
2331                                 this.element_legend_childs.nano.appendChild(content);
2332
2333                                 if(NETDATA.options.current.show_help === true)
2334                                         $(content).popover({
2335                                         container: "body",
2336                                         animation: false,
2337                                         html: true,
2338                                         trigger: 'hover',
2339                                         placement: 'bottom',
2340                                         title: 'Chart Legend',
2341                                         delay: 100,
2342                                         content: 'You can click or tap on the values or the labels to select dimentions. By pressing SHIFT or CONTROL, you can enable or disable multiple dimensions.<br/><small>Help, can be disabled from the settings.</small>'
2343                                 });
2344                         }
2345                         else {
2346                                 this.element_legend_childs = {
2347                                         content: content,
2348                                         resize_handler: null,
2349                                         toolbox: null,
2350                                         toolbox_left: null,
2351                                         toolbox_right: null,
2352                                         toolbox_reset: null,
2353                                         toolbox_zoomin: null,
2354                                         toolbox_zoomout: null,
2355                                         toolbox_volume: null,
2356                                         title_date: null,
2357                                         title_time: null,
2358                                         title_units: null,
2359                                         nano: null,
2360                                         nano_options: null,
2361                                         series: {}
2362                                 };
2363                         }
2364
2365                         if(this.data) {
2366                                 this.element_legend_childs.series.labels_key = this.data.dimension_names.toString();
2367                                 if(this.debug === true)
2368                                         this.log('labels from data: "' + this.element_legend_childs.series.labels_key + '"');
2369
2370                                 for(var i = 0, len = this.data.dimension_names.length; i < len ;i++) {
2371                                         genLabel(this, content, this.data.dimension_names[i], i);
2372                                 }
2373                         }
2374                         else {
2375                                 var tmp = new Array();
2376                                 for(var dim in this.chart.dimensions) {
2377                                         tmp.push(this.chart.dimensions[dim].name);
2378                                         genLabel(this, content, this.chart.dimensions[dim].name, i);
2379                                 }
2380                                 this.element_legend_childs.series.labels_key = tmp.toString();
2381                                 if(this.debug === true)
2382                                         this.log('labels from chart: "' + this.element_legend_childs.series.labels_key + '"');
2383                         }
2384
2385                         // create a hidden div to be used for hidding
2386                         // the original legend of the chart library
2387                         var el = document.createElement('div');
2388                         if(this.element_legend !== null)
2389                                 this.element_legend.appendChild(el);
2390                         el.style.display = 'none';
2391
2392                         this.element_legend_childs.hidden = document.createElement('div');
2393                         el.appendChild(this.element_legend_childs.hidden);
2394
2395                         if(this.element_legend_childs.nano !== null && this.element_legend_childs.nano_options !== null)
2396                                 $(this.element_legend_childs.nano).nanoScroller(this.element_legend_childs.nano_options);
2397
2398                         this.legendShowLatestValues();
2399                 }
2400
2401                 this.hasLegend = function() {
2402                         if(typeof this.___hasLegendCache___ !== 'undefined')
2403                                 return this.___hasLegendCache___;
2404
2405                         var leg = false;
2406                         if(this.library && this.library.legend(this) === 'right-side') {
2407                                 var legend = $(this.element).data('legend') || 'yes';
2408                                 if(legend === 'yes') leg = true;
2409                         }
2410
2411                         this.___hasLegendCache___ = leg;
2412                         return leg;
2413                 }
2414
2415                 this.legendWidth = function() {
2416                         return (this.hasLegend())?140:0;
2417                 }
2418
2419                 this.legendHeight = function() {
2420                         return $(this.element).height();
2421                 }
2422
2423                 this.chartWidth = function() {
2424                         return $(this.element).width() - this.legendWidth();
2425                 }
2426
2427                 this.chartHeight = function() {
2428                         return $(this.element).height();
2429                 }
2430
2431                 this.chartPixelsPerPoint = function() {
2432                         // force an options provided detail
2433                         var px = this.pixels_per_point;
2434
2435                         if(this.library && px < this.library.pixels_per_point(this))
2436                                 px = this.library.pixels_per_point(this);
2437
2438                         if(px < NETDATA.options.current.pixels_per_point)
2439                                 px = NETDATA.options.current.pixels_per_point;
2440
2441                         return px;
2442                 }
2443
2444                 this.needsRecreation = function() {
2445                         return (
2446                                         this.chart_created === true
2447                                         && this.library
2448                                         && this.library.autoresize() === false
2449                                         && this.tm.last_resized < NETDATA.options.last_resized
2450                                 );
2451                 }
2452
2453                 this.chartURL = function() {
2454                         var after, before, points_multiplier = 1;
2455                         if(NETDATA.globalPanAndZoom.isActive() && NETDATA.globalPanAndZoom.isMaster(this) === false) {
2456                                 this.tm.pan_and_zoom_seq = NETDATA.globalPanAndZoom.seq;
2457
2458                                 after = Math.round(NETDATA.globalPanAndZoom.force_after_ms / 1000);
2459                                 before = Math.round(NETDATA.globalPanAndZoom.force_before_ms / 1000);
2460                                 this.view_after = after * 1000;
2461                                 this.view_before = before * 1000;
2462
2463                                 this.requested_padding = null;
2464                                 points_multiplier = 1;
2465                         }
2466                         else if(this.current.force_before_ms !== null && this.current.force_after_ms !== null) {
2467                                 this.tm.pan_and_zoom_seq = 0;
2468
2469                                 before = Math.round(this.current.force_before_ms / 1000);
2470                                 after  = Math.round(this.current.force_after_ms / 1000);
2471                                 this.view_after = after * 1000;
2472                                 this.view_before = before * 1000;
2473
2474                                 if(NETDATA.options.current.pan_and_zoom_data_padding === true) {
2475                                         this.requested_padding = Math.round((before - after) / 2);
2476                                         after -= this.requested_padding;
2477                                         before += this.requested_padding;
2478                                         this.requested_padding *= 1000;
2479                                         points_multiplier = 2;
2480                                 }
2481
2482                                 this.current.force_before_ms = null;
2483                                 this.current.force_after_ms = null;
2484                         }
2485                         else {
2486                                 this.tm.pan_and_zoom_seq = 0;
2487
2488                                 before = this.before;
2489                                 after  = this.after;
2490                                 this.view_after = after * 1000;
2491                                 this.view_before = before * 1000;
2492
2493                                 this.requested_padding = null;
2494                                 points_multiplier = 1;
2495                         }
2496
2497                         this.requested_after = after * 1000;
2498                         this.requested_before = before * 1000;
2499
2500                         this.data_points = this.points || Math.round(this.chartWidth() / this.chartPixelsPerPoint());
2501
2502                         // build the data URL
2503                         this.data_url = this.host + this.chart.data_url;
2504                         this.data_url += "&format="  + this.library.format();
2505                         this.data_url += "&points="  + (this.data_points * points_multiplier).toString();
2506                         this.data_url += "&group="   + this.method;
2507                         this.data_url += "&options=" + this.library.options(this);
2508                         this.data_url += '|jsonwrap';
2509
2510                         if(NETDATA.options.current.eliminate_zero_dimensions === true)
2511                                 this.data_url += '|nonzero';
2512
2513                         if(this.append_options !== null)
2514                                 this.data_url += '|' + this.append_options.toString();
2515
2516                         if(after)
2517                                 this.data_url += "&after="  + after.toString();
2518
2519                         if(before)
2520                                 this.data_url += "&before=" + before.toString();
2521
2522                         if(this.dimensions)
2523                                 this.data_url += "&dimensions=" + this.dimensions;
2524
2525                         if(NETDATA.options.debug.chart_data_url === true || this.debug === true)
2526                                 this.log('chartURL(): ' + this.data_url + ' WxH:' + this.chartWidth() + 'x' + this.chartHeight() + ' points: ' + this.data_points + ' library: ' + this.library_name);
2527                 }
2528
2529                 this.redrawChart = function() {
2530                         if(this.data !== null)
2531                                 this.updateChartWithData(this.data);
2532                 }
2533
2534                 this.updateChartWithData = function(data) {
2535                         if(this.debug === true)
2536                                 this.log('updateChartWithData() called.');
2537
2538                         this._updating = false;
2539
2540                         // this may force the chart to be re-created
2541                         resizeChart();
2542
2543                         this.data = data;
2544                         this.updates_counter++;
2545                         this.updates_since_last_unhide++;
2546                         this.updates_since_last_creation++;
2547
2548                         var started = new Date().getTime();
2549
2550                         // if the result is JSON, find the latest update-every
2551                         this.data_update_every = data.view_update_every * 1000;
2552                         this.data_after = data.after * 1000;
2553                         this.data_before = data.before * 1000;
2554                         this.netdata_first = data.first_entry * 1000;
2555                         this.netdata_last = data.last_entry * 1000;
2556                         this.data_points = data.points;
2557                         data.state = this;
2558
2559                         if(NETDATA.options.current.pan_and_zoom_data_padding === true && this.requested_padding !== null) {
2560                                 if(this.view_after < this.data_after) {
2561                                         // console.log('adusting view_after from ' + this.view_after + ' to ' + this.data_after);
2562                                         this.view_after = this.data_after;
2563                                 }
2564
2565                                 if(this.view_before > this.data_before) {
2566                                         // console.log('adusting view_before from ' + this.view_before + ' to ' + this.data_before);
2567                                         this.view_before = this.data_before;
2568                                 }
2569                         }
2570                         else {
2571                                 this.view_after = this.data_after;
2572                                 this.view_before = this.data_before;
2573                         }
2574
2575                         if(this.debug === true) {
2576                                 this.log('UPDATE No ' + this.updates_counter + ' COMPLETED');
2577
2578                                 if(this.current.force_after_ms)
2579                                         this.log('STATUS: forced    : ' + (this.current.force_after_ms / 1000).toString() + ' - ' + (this.current.force_before_ms / 1000).toString());
2580                                 else
2581                                         this.log('STATUS: forced    : unset');
2582
2583                                 this.log('STATUS: requested : ' + (this.requested_after / 1000).toString() + ' - ' + (this.requested_before / 1000).toString());
2584                                 this.log('STATUS: downloaded: ' + (this.data_after / 1000).toString() + ' - ' + (this.data_before / 1000).toString());
2585                                 this.log('STATUS: rendered  : ' + (this.view_after / 1000).toString() + ' - ' + (this.view_before / 1000).toString());
2586                                 this.log('STATUS: points    : ' + (this.data_points).toString());
2587                         }
2588
2589                         if(this.data_points === 0) {
2590                                 noDataToShow();
2591                                 return;
2592                         }
2593
2594                         if(this.updates_since_last_creation >= this.library.max_updates_to_recreate()) {
2595                                 if(this.debug === true)
2596                                         this.log('max updates of ' + this.updates_since_last_creation.toString() + ' reached. Forcing re-generation.');
2597
2598                                 this.chart_created = false;
2599                         }
2600
2601                         // check and update the legend
2602                         this.legendUpdateDOM();
2603
2604                         if(this.chart_created === true
2605                                 && typeof this.library.update === 'function') {
2606
2607                                 if(this.debug === true)
2608                                         this.log('updating chart...');
2609
2610                                 if(callChartLibraryUpdateSafely(data) === false)
2611                                         return;
2612                         }
2613                         else {
2614                                 if(this.debug === true)
2615                                         this.log('creating chart...');
2616
2617                                 if(callChartLibraryCreateSafely(data) === false)
2618                                         return;
2619                         }
2620                         hideMessage();
2621                         this.legendShowLatestValues();
2622                         if(this.selected === true)
2623                                 NETDATA.globalSelectionSync.stop();
2624
2625                         // update the performance counters
2626                         var now = new Date().getTime();
2627                         this.tm.last_updated = now;
2628
2629                         // don't update last_autorefreshed if this chart is
2630                         // forced to be updated with global PanAndZoom
2631                         if(NETDATA.globalPanAndZoom.isActive())
2632                                 this.tm.last_autorefreshed = 0;
2633                         else {
2634                                 if(NETDATA.options.current.parallel_refresher === true && NETDATA.options.current.concurrent_refreshes)
2635                                         this.tm.last_autorefreshed = Math.round(now / this.data_update_every) * this.data_update_every;
2636                                 else
2637                                         this.tm.last_autorefreshed = now;
2638                         }
2639
2640                         this.refresh_dt_ms = now - started;
2641                         NETDATA.options.auto_refresher_fast_weight += this.refresh_dt_ms;
2642
2643                         if(this.refresh_dt_element !== null)
2644                                 this.refresh_dt_element.innerHTML = this.refresh_dt_ms.toString();
2645                 }
2646
2647                 this.updateChart = function(callback) {
2648                         if(this.debug === true)
2649                                 this.log('updateChart() called.');
2650
2651                         if(this._updating === true) {
2652                                 if(this.debug === true)
2653                                         this.log('I am already updating...');
2654
2655                                 if(typeof callback === 'function') callback();
2656                                 return false;
2657                         }
2658
2659                         // due to late initialization of charts and libraries
2660                         // we need to check this too
2661                         if(this.enabled === false) {
2662                                 if(this.debug === true)
2663                                         this.log('I am not enabled');
2664
2665                                 if(typeof callback === 'function') callback();
2666                                 return false;
2667                         }
2668
2669                         if(canBeRendered() === false) {
2670                                 if(typeof callback === 'function') callback();
2671                                 return false;
2672                         }
2673
2674                         if(this.chart === null) {
2675                                 this.getChart(function() { that.updateChart(callback); });
2676                                 return false;
2677                         }
2678
2679                         if(this.library.initialized === false) {
2680                                 if(this.library.enabled === true) {
2681                                         this.library.initialize(function() { that.updateChart(callback); });
2682                                         return false;
2683                                 }
2684                                 else {
2685                                         error('chart library "' + this.library_name + '" is not available.');
2686                                         if(typeof callback === 'function') callback();
2687                                         return false;
2688                                 }
2689                         }
2690
2691                         this.clearSelection();
2692                         this.chartURL();
2693
2694                         if(this.debug === true)
2695                                 this.log('updating from ' + this.data_url);
2696
2697                         this._updating = true;
2698
2699                         this.xhr = $.ajax( {
2700                                 url: this.data_url,
2701                                 crossDomain: NETDATA.options.crossDomainAjax,
2702                                 cache: false,
2703                                 async: true
2704                         })
2705                         .success(function(data) {
2706                                 if(that.debug === true)
2707                                         that.log('data received. updating chart.');
2708
2709                                 that.updateChartWithData(data);
2710                         })
2711                         .fail(function() {
2712                                 error('data download failed for url: ' + that.data_url);
2713                         })
2714                         .always(function() {
2715                                 this._updating = false;
2716                                 if(typeof callback === 'function') callback();
2717                         });
2718
2719                         return true;
2720                 }
2721
2722                 this.isVisible = function(nocache) {
2723                         if(typeof nocache === 'undefined')
2724                                 nocache = false;
2725
2726                         // this.log('last_visible_check: ' + this.tm.last_visible_check + ', last_page_scroll: ' + NETDATA.options.last_page_scroll);
2727
2728                         // caching - we do not evaluate the charts visibility
2729                         // if the page has not been scrolled since the last check
2730                         if(nocache === false && this.tm.last_visible_check > NETDATA.options.last_page_scroll)
2731                                 return this.___isVisible___;
2732
2733                         this.tm.last_visible_check = new Date().getTime();
2734
2735                         var wh = window.innerHeight;
2736                         var x = this.element.getBoundingClientRect();
2737                         var ret = 0;
2738                         var tolerance = 0;
2739
2740                         if(x.width === 0 || x.height === 0) {
2741                                 hideChart();
2742                                 this.___isVisible___ = false;
2743                                 return this.___isVisible___;
2744                         }
2745
2746                         if(x.top < 0 && -x.top > x.height) {
2747                                 // the chart is entirely above
2748                                 ret = -x.top - x.height;
2749                         }
2750                         else if(x.top > wh) {
2751                                 // the chart is entirely below
2752                                 ret = x.top - wh;
2753                         }
2754
2755                         if(ret > tolerance) {
2756                                 // the chart is too far
2757
2758                                 hideChart();
2759                                 this.___isVisible___ = false;
2760                                 return this.___isVisible___;
2761                         }
2762                         else {
2763                                 // the chart is inside or very close
2764
2765                                 unhideChart();
2766                                 this.___isVisible___ = true;
2767                                 return this.___isVisible___;
2768                         }
2769                 }
2770
2771                 this.isAutoRefreshed = function() {
2772                         return (this.current.autorefresh);
2773                 }
2774
2775                 this.canBeAutoRefreshed = function() {
2776                         now = new Date().getTime();
2777
2778                         if(this.enabled === false) {
2779                                 if(this.debug === true)
2780                                         this.log('I am not enabled');
2781
2782                                 return false;
2783                         }
2784
2785                         if(this.library === null || this.library.enabled === false) {
2786                                 error('charting library "' + this.library_name + '" is not available');
2787                                 if(this.debug === true)
2788                                         this.log('My chart library ' + this.library_name + ' is not available');
2789
2790                                 return false;
2791                         }
2792
2793                         if(this.isVisible() === false) {
2794                                 if(NETDATA.options.debug.visibility === true || this.debug === true)
2795                                         this.log('I am not visible');
2796
2797                                 return false;
2798                         }
2799
2800                         if(this.current.force_update_at !== 0 && this.current.force_update_at < now) {
2801                                 if(this.debug === true)
2802                                         this.log('timed force update detected - allowing this update');
2803
2804                                 this.current.force_update_at = 0;
2805                                 return true;
2806                         }
2807
2808                         if(this.isAutoRefreshed() === true) {
2809                                 // allow the first update, even if the page is not visible
2810                                 if(this.updates_counter && this.updates_since_last_unhide && NETDATA.options.page_is_visible === false) {
2811                                         if(NETDATA.options.debug.focus === true || this.debug === true)
2812                                                 this.log('canBeAutoRefreshed(): page does not have focus');
2813
2814                                         return false;
2815                                 }
2816
2817                                 if(this.needsRecreation() === true) {
2818                                         if(this.debug === true)
2819                                                 this.log('canBeAutoRefreshed(): needs re-creation.');
2820
2821                                         return true;
2822                                 }
2823
2824                                 // options valid only for autoRefresh()
2825                                 if(NETDATA.options.auto_refresher_stop_until === 0 || NETDATA.options.auto_refresher_stop_until < now) {
2826                                         if(NETDATA.globalPanAndZoom.isActive()) {
2827                                                 if(NETDATA.globalPanAndZoom.shouldBeAutoRefreshed(this)) {
2828                                                         if(this.debug === true)
2829                                                                 this.log('canBeAutoRefreshed(): global panning: I need an update.');
2830
2831                                                         return true;
2832                                                 }
2833                                                 else {
2834                                                         if(this.debug === true)
2835                                                                 this.log('canBeAutoRefreshed(): global panning: I am already up to date.');
2836
2837                                                         return false;
2838                                                 }
2839                                         }
2840
2841                                         if(this.selected === true) {
2842                                                 if(this.debug === true)
2843                                                         this.log('canBeAutoRefreshed(): I have a selection in place.');
2844
2845                                                 return false;
2846                                         }
2847
2848                                         if(this.paused === true) {
2849                                                 if(this.debug === true)
2850                                                         this.log('canBeAutoRefreshed(): I am paused.');
2851
2852                                                 return false;
2853                                         }
2854
2855                                         if(now - this.tm.last_autorefreshed >= this.data_update_every) {
2856                                                 if(this.debug === true)
2857                                                         this.log('canBeAutoRefreshed(): It is time to update me.');
2858
2859                                                 return true;
2860                                         }
2861                                 }
2862                         }
2863
2864                         return false;
2865                 }
2866
2867                 this.autoRefresh = function(callback) {
2868                         if(this.canBeAutoRefreshed() === true) {
2869                                 this.updateChart(callback);
2870                         }
2871                         else {
2872                                 if(typeof callback !== 'undefined')
2873                                         callback();
2874                         }
2875                 }
2876
2877                 this._defaultsFromDownloadedChart = function(chart) {
2878                         this.chart = chart;
2879                         this.chart_url = chart.url;
2880                         this.data_update_every = chart.update_every * 1000;
2881                         this.data_points = Math.round(this.chartWidth() / this.chartPixelsPerPoint());
2882                         this.tm.last_info_downloaded = new Date().getTime();
2883
2884                         if(this.title === null)
2885                                 this.title = chart.title;
2886
2887                         if(this.units === null)
2888                                 this.units = chart.units;
2889                 }
2890
2891                 // fetch the chart description from the netdata server
2892                 this.getChart = function(callback) {
2893                         this.chart = NETDATA.chartRegistry.get(this.host, this.id);
2894                         if(this.chart) {
2895                                 this._defaultsFromDownloadedChart(this.chart);
2896                                 if(typeof callback === 'function') callback();
2897                         }
2898                         else {
2899                                 this.chart_url = "/api/v1/chart?chart=" + this.id;
2900
2901                                 if(this.debug === true)
2902                                         this.log('downloading ' + this.chart_url);
2903
2904                                 $.ajax( {
2905                                         url:  this.host + this.chart_url,
2906                                         crossDomain: NETDATA.options.crossDomainAjax,
2907                                         cache: false,
2908                                         async: true
2909                                 })
2910                                 .done(function(chart) {
2911                                         chart.url = that.chart_url;
2912                                         that._defaultsFromDownloadedChart(chart);
2913                                         NETDATA.chartRegistry.add(that.host, that.id, chart);
2914                                 })
2915                                 .fail(function() {
2916                                         NETDATA.error(404, that.chart_url);
2917                                         error('chart not found on url "' + that.chart_url + '"');
2918                                 })
2919                                 .always(function() {
2920                                         if(typeof callback === 'function') callback();
2921                                 });
2922                         }
2923                 }
2924
2925                 // ============================================================================================================
2926                 // INITIALIZATION
2927
2928                 init();
2929         }
2930
2931         NETDATA.resetAllCharts = function(state) {
2932                 // first clear the global selection sync
2933                 // to make sure no chart is in selected state
2934                 state.globalSelectionSyncStop();
2935
2936                 // there are 2 possibilities here
2937                 // a. state is the global Pan and Zoom master
2938                 // b. state is not the global Pan and Zoom master
2939                 var master = true;
2940                 if(NETDATA.globalPanAndZoom.isMaster(state) === false)
2941                         master = false;
2942
2943                 // clear the global Pan and Zoom
2944                 // this will also refresh the master
2945                 // and unblock any charts currently mirroring the master
2946                 NETDATA.globalPanAndZoom.clearMaster();
2947
2948                 // if we were not the master, reset our status too
2949                 // this is required because most probably the mouse
2950                 // is over this chart, blocking it from autorefreshing
2951                 if(master === false && (state.paused === true || state.selected === true))
2952                         state.resetChart();
2953         }
2954
2955         // get or create a chart state, given a DOM element
2956         NETDATA.chartState = function(element) {
2957                 var state = $(element).data('netdata-state-object') || null;
2958                 if(state === null) {
2959                         state = new chartState(element);
2960                         $(element).data('netdata-state-object', state);
2961                 }
2962                 return state;
2963         }
2964
2965         // ----------------------------------------------------------------------------------------------------------------
2966         // Library functions
2967
2968         // Load a script without jquery
2969         // This is used to load jquery - after it is loaded, we use jquery
2970         NETDATA._loadjQuery = function(callback) {
2971                 if(typeof jQuery === 'undefined') {
2972                         if(NETDATA.options.debug.main_loop === true)
2973                                 console.log('loading ' + NETDATA.jQuery);
2974
2975                         var script = document.createElement('script');
2976                         script.type = 'text/javascript';
2977                         script.async = true;
2978                         script.src = NETDATA.jQuery;
2979
2980                         // script.onabort = onError;
2981                         script.onerror = function(err, t) { NETDATA.error(101, NETDATA.jQuery); };
2982                         if(typeof callback === "function")
2983                                 script.onload = callback;
2984
2985                         var s = document.getElementsByTagName('script')[0];
2986                         s.parentNode.insertBefore(script, s);
2987                 }
2988                 else if(typeof callback === "function")
2989                         callback();
2990         }
2991
2992         NETDATA._loadCSS = function(filename) {
2993                 // don't use jQuery here
2994                 // styles are loaded before jQuery
2995                 // to eliminate showing an unstyled page to the user
2996
2997                 var fileref = document.createElement("link");
2998                 fileref.setAttribute("rel", "stylesheet");
2999                 fileref.setAttribute("type", "text/css");
3000                 fileref.setAttribute("href", filename);
3001
3002                 if (typeof fileref !== 'undefined')
3003                         document.getElementsByTagName("head")[0].appendChild(fileref);
3004         }
3005
3006         NETDATA.colorHex2Rgb = function(hex) {
3007                 // Expand shorthand form (e.g. "03F") to full form (e.g. "0033FF")
3008                 var shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i;
3009                         hex = hex.replace(shorthandRegex, function(m, r, g, b) {
3010                         return r + r + g + g + b + b;
3011                 });
3012
3013                 var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
3014                 return result ? {
3015                         r: parseInt(result[1], 16),
3016                         g: parseInt(result[2], 16),
3017                         b: parseInt(result[3], 16)
3018                 } : null;
3019         }
3020
3021         NETDATA.colorLuminance = function(hex, lum) {
3022                 // validate hex string
3023                 hex = String(hex).replace(/[^0-9a-f]/gi, '');
3024                 if (hex.length < 6)
3025                         hex = hex[0]+hex[0]+hex[1]+hex[1]+hex[2]+hex[2];
3026
3027                 lum = lum || 0;
3028
3029                 // convert to decimal and change luminosity
3030                 var rgb = "#", c, i;
3031                 for (i = 0; i < 3; i++) {
3032                         c = parseInt(hex.substr(i*2,2), 16);
3033                         c = Math.round(Math.min(Math.max(0, c + (c * lum)), 255)).toString(16);
3034                         rgb += ("00"+c).substr(c.length);
3035                 }
3036
3037                 return rgb;
3038         }
3039
3040         NETDATA.guid = function() {
3041                 function s4() {
3042                         return Math.floor((1 + Math.random()) * 0x10000)
3043                                         .toString(16)
3044                                         .substring(1);
3045                         }
3046
3047                         return s4() + s4() + '-' + s4() + '-' + s4() + '-' + s4() + '-' + s4() + s4() + s4();
3048         }
3049
3050         NETDATA.zeropad = function(x) {
3051                 if(x > -10 && x < 10) return '0' + x.toString();
3052                 else return x.toString();
3053         }
3054
3055         // user function to signal us the DOM has been
3056         // updated.
3057         NETDATA.updatedDom = function() {
3058                 NETDATA.options.updated_dom = true;
3059         }
3060
3061         NETDATA.ready = function(callback) {
3062                 NETDATA.options.pauseCallback = callback;
3063         }
3064
3065         NETDATA.pause = function(callback) {
3066                 if(NETDATA.options.pause === true)
3067                         callback();
3068                 else
3069                         NETDATA.options.pauseCallback = callback;
3070         }
3071
3072         NETDATA.unpause = function() {
3073                 NETDATA.options.pauseCallback = null;
3074                 NETDATA.options.updated_dom = true;
3075                 NETDATA.options.pause = false;
3076         }
3077
3078         // ----------------------------------------------------------------------------------------------------------------
3079
3080         // this is purely sequencial charts refresher
3081         // it is meant to be autonomous
3082         NETDATA.chartRefresherNoParallel = function(index) {
3083                 if(NETDATA.options.debug.mail_loop === true)
3084                         console.log('NETDATA.chartRefresherNoParallel(' + index + ')');
3085
3086                 if(NETDATA.options.updated_dom === true) {
3087                         // the dom has been updated
3088                         // get the dom parts again
3089                         NETDATA.parseDom(NETDATA.chartRefresher);
3090                         return;
3091                 }
3092                 if(index >= NETDATA.options.targets.length) {
3093                         if(NETDATA.options.debug.main_loop === true)
3094                                 console.log('waiting to restart main loop...');
3095
3096                         NETDATA.options.auto_refresher_fast_weight = 0;
3097
3098                         setTimeout(function() {
3099                                 NETDATA.chartRefresher();
3100                         }, NETDATA.options.current.idle_between_loops);
3101                 }
3102                 else {
3103                         var state = NETDATA.options.targets[index];
3104
3105                         if(NETDATA.options.auto_refresher_fast_weight < NETDATA.options.current.fast_render_timeframe) {
3106                                 if(NETDATA.options.debug.main_loop === true)
3107                                         console.log('fast rendering...');
3108
3109                                 state.autoRefresh(function() {
3110                                         NETDATA.chartRefresherNoParallel(++index);
3111                                 });
3112                         }
3113                         else {
3114                                 if(NETDATA.options.debug.main_loop === true) console.log('waiting for next refresh...');
3115                                 NETDATA.options.auto_refresher_fast_weight = 0;
3116
3117                                 setTimeout(function() {
3118                                         state.autoRefresh(function() {
3119                                                 NETDATA.chartRefresherNoParallel(++index);
3120                                         });
3121                                 }, NETDATA.options.current.idle_between_charts);
3122                         }
3123                 }
3124         }
3125
3126         // this is part of the parallel refresher
3127         // its cause is to refresh sequencially all the charts
3128         // that depend on chart library initialization
3129         // it will call the parallel refresher back
3130         // as soon as it sees a chart that its chart library
3131         // is initialized
3132         NETDATA.chartRefresher_unitialized = function() {
3133                 if(NETDATA.options.updated_dom === true) {
3134                         // the dom has been updated
3135                         // get the dom parts again
3136                         NETDATA.parseDom(NETDATA.chartRefresher);
3137                         return;
3138                 }
3139
3140                 if(NETDATA.options.sequencial.length === 0)
3141                         NETDATA.chartRefresher();
3142                 else {
3143                         var state = NETDATA.options.sequencial.pop();
3144                         if(state.library.initialized === true)
3145                                 NETDATA.chartRefresher();
3146                         else
3147                                 state.autoRefresh(NETDATA.chartRefresher_unitialized);
3148                 }
3149         }
3150
3151         NETDATA.chartRefresherWaitTime = function() {
3152                 return NETDATA.options.current.idle_parallel_loops;
3153         }
3154
3155         // the default refresher
3156         // it will create 2 sets of charts:
3157         // - the ones that can be refreshed in parallel
3158         // - the ones that depend on something else
3159         // the first set will be executed in parallel
3160         // the second will be given to NETDATA.chartRefresher_unitialized()
3161         NETDATA.chartRefresher = function() {
3162                 if(NETDATA.options.pause === true) {
3163                         // console.log('auto-refresher is paused');
3164                         setTimeout(NETDATA.chartRefresher,
3165                                 NETDATA.chartRefresherWaitTime());
3166                         return;
3167                 }
3168
3169                 if(typeof NETDATA.options.pauseCallback === 'function') {
3170                         // console.log('auto-refresher is calling pauseCallback');
3171                         NETDATA.options.pause = true;
3172                         NETDATA.options.pauseCallback();
3173                         NETDATA.chartRefresher();
3174                         return;
3175                 }
3176
3177                 if(NETDATA.options.current.parallel_refresher === false) {
3178                         NETDATA.chartRefresherNoParallel(0);
3179                         return;
3180                 }
3181
3182                 if(NETDATA.options.updated_dom === true) {
3183                         // the dom has been updated
3184                         // get the dom parts again
3185                         NETDATA.parseDom(NETDATA.chartRefresher);
3186                         return;
3187                 }
3188
3189                 var parallel = new Array();
3190                 var targets = NETDATA.options.targets;
3191                 var len = targets.length;
3192                 while(len--) {
3193                         if(targets[len].isVisible() === false)
3194                                 continue;
3195
3196                         var state = targets[len];
3197                         if(state.library.initialized === false) {
3198                                 if(state.library.enabled === true) {
3199                                         state.library.initialize(NETDATA.chartRefresher);
3200                                         return;
3201                                 }
3202                                 else {
3203                                         state.error('chart library "' + state.library_name + '" is not enabled.');
3204                                 }
3205                         }
3206
3207                         parallel.unshift(state);
3208                 }
3209
3210                 if(parallel.length > 0) {
3211                         var parallel_jobs = parallel.length;
3212
3213                         // this will execute the jobs in parallel
3214                         $(parallel).each(function() {
3215                                 this.autoRefresh(function() {
3216                                         parallel_jobs--;
3217
3218                                         if(parallel_jobs === 0) {
3219                                                 setTimeout(NETDATA.chartRefresher,
3220                                                         NETDATA.chartRefresherWaitTime());
3221                                         }
3222                                 });
3223                         })
3224                 }
3225                 else {
3226                         setTimeout(NETDATA.chartRefresher,
3227                                 NETDATA.chartRefresherWaitTime());
3228                 }
3229         }
3230
3231         NETDATA.parseDom = function(callback) {
3232                 NETDATA.options.last_page_scroll = new Date().getTime();
3233                 NETDATA.options.updated_dom = false;
3234
3235                 var targets = $('div[data-netdata]'); //.filter(':visible');
3236
3237                 if(NETDATA.options.debug.main_loop === true)
3238                         console.log('DOM updated - there are ' + targets.length + ' charts on page.');
3239
3240                 NETDATA.options.targets = new Array();
3241                 var len = targets.length;
3242                 while(len--) {
3243                         // the initialization will take care of sizing
3244                         // and the "loading..." message
3245                         NETDATA.options.targets.push(NETDATA.chartState(targets[len]));
3246                 }
3247
3248                 if(typeof callback === 'function') callback();
3249         }
3250
3251         // this is the main function - where everything starts
3252         NETDATA.start = function() {
3253                 // this should be called only once
3254
3255                 NETDATA.options.page_is_visible = true;
3256
3257                 $(window).blur(function() {
3258                         if(NETDATA.options.current.stop_updates_when_focus_is_lost === true) {
3259                                 NETDATA.options.page_is_visible = false;
3260                                 if(NETDATA.options.debug.focus === true)
3261                                         console.log('Lost Focus!');
3262                         }
3263                 });
3264
3265                 $(window).focus(function() {
3266                         if(NETDATA.options.current.stop_updates_when_focus_is_lost === true) {
3267                                 NETDATA.options.page_is_visible = true;
3268                                 if(NETDATA.options.debug.focus === true)
3269                                         console.log('Focus restored!');
3270                         }
3271                 });
3272
3273                 if(typeof document.hasFocus === 'function' && !document.hasFocus()) {
3274                         if(NETDATA.options.current.stop_updates_when_focus_is_lost === true) {
3275                                 NETDATA.options.page_is_visible = false;
3276                                 if(NETDATA.options.debug.focus === true)
3277                                         console.log('Document has no focus!');
3278                         }
3279                 }
3280
3281                 // bootstrap tab switching
3282                 $('a[data-toggle="tab"]').on('shown.bs.tab', NETDATA.onscroll);
3283
3284                 // bootstrap modal switching
3285                 $('.modal').on('hidden.bs.modal', NETDATA.onscroll);
3286                 $('.modal').on('shown.bs.modal', NETDATA.onscroll);
3287
3288                 NETDATA.parseDom(NETDATA.chartRefresher);
3289         }
3290
3291         // ----------------------------------------------------------------------------------------------------------------
3292         // peity
3293
3294         NETDATA.peityInitialize = function(callback) {
3295                 if(typeof netdataNoPeitys === 'undefined' || !netdataNoPeitys) {
3296                         $.ajax({
3297                                 url: NETDATA.peity_js,
3298                                 cache: true,
3299                                 dataType: "script"
3300                         })
3301                         .done(function() {
3302                                 NETDATA.registerChartLibrary('peity', NETDATA.peity_js);
3303                         })
3304                         .fail(function() {
3305                                 NETDATA.chartLibraries.peity.enabled = false;
3306                                 NETDATA.error(100, NETDATA.peity_js);
3307                         })
3308                         .always(function() {
3309                                 if(typeof callback === "function")
3310                                         callback();
3311                         });
3312                 }
3313                 else {
3314                         NETDATA.chartLibraries.peity.enabled = false;
3315                         if(typeof callback === "function")
3316                                 callback();
3317                 }
3318         };
3319
3320         NETDATA.peityChartUpdate = function(state, data) {
3321                 state.peity_instance.innerHTML = data.result;
3322
3323                 if(state.peity_options.stroke !== state.chartColors()[0]) {
3324                         state.peity_options.stroke = state.chartColors()[0];
3325                         if(state.chart.chart_type === 'line')
3326                                 state.peity_options.fill = NETDATA.themes.current.background;
3327                         else
3328                                 state.peity_options.fill = NETDATA.colorLuminance(state.chartColors()[0], NETDATA.chartDefaults.fill_luminance);
3329                 }
3330
3331                 $(state.peity_instance).peity('line', state.peity_options);
3332                 return true;
3333         }
3334
3335         NETDATA.peityChartCreate = function(state, data) {
3336                 state.peity_instance = document.createElement('div');
3337                 state.element_chart.appendChild(state.peity_instance);
3338
3339                 var self = $(state.element);
3340                 state.peity_options = {
3341                         stroke: NETDATA.themes.current.foreground,
3342                         strokeWidth: self.data('peity-strokewidth') || 1,
3343                         width: state.chartWidth(),
3344                         height: state.chartHeight(),
3345                         fill: NETDATA.themes.current.foreground
3346                 };
3347
3348                 NETDATA.peityChartUpdate(state, data);
3349                 return true;
3350         }
3351
3352         // ----------------------------------------------------------------------------------------------------------------
3353         // sparkline
3354
3355         NETDATA.sparklineInitialize = function(callback) {
3356                 if(typeof netdataNoSparklines === 'undefined' || !netdataNoSparklines) {
3357                         $.ajax({
3358                                 url: NETDATA.sparkline_js,
3359                                 cache: true,
3360                                 dataType: "script"
3361                         })
3362                         .done(function() {
3363                                 NETDATA.registerChartLibrary('sparkline', NETDATA.sparkline_js);
3364                         })
3365                         .fail(function() {
3366                                 NETDATA.chartLibraries.sparkline.enabled = false;
3367                                 NETDATA.error(100, NETDATA.sparkline_js);
3368                         })
3369                         .always(function() {
3370                                 if(typeof callback === "function")
3371                                         callback();
3372                         });
3373                 }
3374                 else {
3375                         NETDATA.chartLibraries.sparkline.enabled = false;
3376                         if(typeof callback === "function")
3377                                 callback();
3378                 }
3379         };
3380
3381         NETDATA.sparklineChartUpdate = function(state, data) {
3382                 state.sparkline_options.width = state.chartWidth();
3383                 state.sparkline_options.height = state.chartHeight();
3384
3385                 $(state.element_chart).sparkline(data.result, state.sparkline_options);
3386                 return true;
3387         }
3388
3389         NETDATA.sparklineChartCreate = function(state, data) {
3390                 var self = $(state.element);
3391                 var type = self.data('sparkline-type') || 'line';
3392                 var lineColor = self.data('sparkline-linecolor') || state.chartColors()[0];
3393                 var fillColor = self.data('sparkline-fillcolor') || (state.chart.chart_type === 'line')?NETDATA.themes.current.background:NETDATA.colorLuminance(lineColor, NETDATA.chartDefaults.fill_luminance);
3394                 var chartRangeMin = self.data('sparkline-chartrangemin') || undefined;
3395                 var chartRangeMax = self.data('sparkline-chartrangemax') || undefined;
3396                 var composite = self.data('sparkline-composite') || undefined;
3397                 var enableTagOptions = self.data('sparkline-enabletagoptions') || undefined;
3398                 var tagOptionPrefix = self.data('sparkline-tagoptionprefix') || undefined;
3399                 var tagValuesAttribute = self.data('sparkline-tagvaluesattribute') || undefined;
3400                 var disableHiddenCheck = self.data('sparkline-disablehiddencheck') || undefined;
3401                 var defaultPixelsPerValue = self.data('sparkline-defaultpixelspervalue') || undefined;
3402                 var spotColor = self.data('sparkline-spotcolor') || undefined;
3403                 var minSpotColor = self.data('sparkline-minspotcolor') || undefined;
3404                 var maxSpotColor = self.data('sparkline-maxspotcolor') || undefined;
3405                 var spotRadius = self.data('sparkline-spotradius') || undefined;
3406                 var valueSpots = self.data('sparkline-valuespots') || undefined;
3407                 var highlightSpotColor = self.data('sparkline-highlightspotcolor') || undefined;
3408                 var highlightLineColor = self.data('sparkline-highlightlinecolor') || undefined;
3409                 var lineWidth = self.data('sparkline-linewidth') || undefined;
3410                 var normalRangeMin = self.data('sparkline-normalrangemin') || undefined;
3411                 var normalRangeMax = self.data('sparkline-normalrangemax') || undefined;
3412                 var drawNormalOnTop = self.data('sparkline-drawnormalontop') || undefined;
3413                 var xvalues = self.data('sparkline-xvalues') || undefined;
3414                 var chartRangeClip = self.data('sparkline-chartrangeclip') || undefined;
3415                 var xvalues = self.data('sparkline-xvalues') || undefined;
3416                 var chartRangeMinX = self.data('sparkline-chartrangeminx') || undefined;
3417                 var chartRangeMaxX = self.data('sparkline-chartrangemaxx') || undefined;
3418                 var disableInteraction = self.data('sparkline-disableinteraction') || false;
3419                 var disableTooltips = self.data('sparkline-disabletooltips') || false;
3420                 var disableHighlight = self.data('sparkline-disablehighlight') || false;
3421                 var highlightLighten = self.data('sparkline-highlightlighten') || 1.4;
3422                 var highlightColor = self.data('sparkline-highlightcolor') || undefined;
3423                 var tooltipContainer = self.data('sparkline-tooltipcontainer') || undefined;
3424                 var tooltipClassname = self.data('sparkline-tooltipclassname') || undefined;
3425                 var tooltipFormat = self.data('sparkline-tooltipformat') || undefined;
3426                 var tooltipPrefix = self.data('sparkline-tooltipprefix') || undefined;
3427                 var tooltipSuffix = self.data('sparkline-tooltipsuffix') || ' ' + state.units;
3428                 var tooltipSkipNull = self.data('sparkline-tooltipskipnull') || true;
3429                 var tooltipValueLookups = self.data('sparkline-tooltipvaluelookups') || undefined;
3430                 var tooltipFormatFieldlist = self.data('sparkline-tooltipformatfieldlist') || undefined;
3431                 var tooltipFormatFieldlistKey = self.data('sparkline-tooltipformatfieldlistkey') || undefined;
3432                 var numberFormatter = self.data('sparkline-numberformatter') || function(n){ return n.toFixed(2); };
3433                 var numberDigitGroupSep = self.data('sparkline-numberdigitgroupsep') || undefined;
3434                 var numberDecimalMark = self.data('sparkline-numberdecimalmark') || undefined;
3435                 var numberDigitGroupCount = self.data('sparkline-numberdigitgroupcount') || undefined;
3436                 var animatedZooms = self.data('sparkline-animatedzooms') || false;
3437
3438                 state.sparkline_options = {
3439                         type: type,
3440                         lineColor: lineColor,
3441                         fillColor: fillColor,
3442                         chartRangeMin: chartRangeMin,
3443                         chartRangeMax: chartRangeMax,
3444                         composite: composite,
3445                         enableTagOptions: enableTagOptions,
3446                         tagOptionPrefix: tagOptionPrefix,
3447                         tagValuesAttribute: tagValuesAttribute,
3448                         disableHiddenCheck: disableHiddenCheck,
3449                         defaultPixelsPerValue: defaultPixelsPerValue,
3450                         spotColor: spotColor,
3451                         minSpotColor: minSpotColor,
3452                         maxSpotColor: maxSpotColor,
3453                         spotRadius: spotRadius,
3454                         valueSpots: valueSpots,
3455                         highlightSpotColor: highlightSpotColor,
3456                         highlightLineColor: highlightLineColor,
3457                         lineWidth: lineWidth,
3458                         normalRangeMin: normalRangeMin,
3459                         normalRangeMax: normalRangeMax,
3460                         drawNormalOnTop: drawNormalOnTop,
3461                         xvalues: xvalues,
3462                         chartRangeClip: chartRangeClip,
3463                         chartRangeMinX: chartRangeMinX,
3464                         chartRangeMaxX: chartRangeMaxX,
3465                         disableInteraction: disableInteraction,
3466                         disableTooltips: disableTooltips,
3467                         disableHighlight: disableHighlight,
3468                         highlightLighten: highlightLighten,
3469                         highlightColor: highlightColor,
3470                         tooltipContainer: tooltipContainer,
3471                         tooltipClassname: tooltipClassname,
3472                         tooltipChartTitle: state.title,
3473                         tooltipFormat: tooltipFormat,
3474                         tooltipPrefix: tooltipPrefix,
3475                         tooltipSuffix: tooltipSuffix,
3476                         tooltipSkipNull: tooltipSkipNull,
3477                         tooltipValueLookups: tooltipValueLookups,
3478                         tooltipFormatFieldlist: tooltipFormatFieldlist,
3479                         tooltipFormatFieldlistKey: tooltipFormatFieldlistKey,
3480                         numberFormatter: numberFormatter,
3481                         numberDigitGroupSep: numberDigitGroupSep,
3482                         numberDecimalMark: numberDecimalMark,
3483                         numberDigitGroupCount: numberDigitGroupCount,
3484                         animatedZooms: animatedZooms,
3485                         width: state.chartWidth(),
3486                         height: state.chartHeight()
3487                 };
3488
3489                 $(state.element_chart).sparkline(data.result, state.sparkline_options);
3490                 return true;
3491         };
3492
3493         // ----------------------------------------------------------------------------------------------------------------
3494         // dygraph
3495
3496         NETDATA.dygraph = {
3497                 smooth: false
3498         };
3499
3500         NETDATA.dygraphToolboxPanAndZoom = function(state, after, before) {
3501                 if(after < state.netdata_first)
3502                         after = state.netdata_first;
3503
3504                 if(before > state.netdata_last)
3505                         before = state.netdata_last;
3506
3507                 state.setMode('zoom');
3508                 state.globalSelectionSyncStop();
3509                 state.globalSelectionSyncDelay();
3510                 state.dygraph_user_action = true;
3511                 state.dygraph_force_zoom = true;
3512                 state.updateChartPanOrZoom(after, before);
3513                 NETDATA.globalPanAndZoom.setMaster(state, after, before);
3514         };
3515
3516         NETDATA.dygraphSetSelection = function(state, t) {
3517                 if(typeof state.dygraph_instance !== 'undefined') {
3518                         var r = state.calculateRowForTime(t);
3519                         if(r !== -1)
3520                                 state.dygraph_instance.setSelection(r);
3521                         else {
3522                                 state.dygraph_instance.clearSelection();
3523                                 state.legendShowUndefined();
3524                         }
3525                 }
3526
3527                 return true;
3528         };
3529
3530         NETDATA.dygraphClearSelection = function(state, t) {
3531                 if(typeof state.dygraph_instance !== 'undefined') {
3532                         state.dygraph_instance.clearSelection();
3533                 }
3534                 return true;
3535         };
3536
3537         NETDATA.dygraphSmoothInitialize = function(callback) {
3538                 $.ajax({
3539                         url: NETDATA.dygraph_smooth_js,
3540                         cache: true,
3541                         dataType: "script"
3542                 })
3543                 .done(function() {
3544                         NETDATA.dygraph.smooth = true;
3545                         smoothPlotter.smoothing = 0.3;
3546                 })
3547                 .fail(function() {
3548                         NETDATA.dygraph.smooth = false;
3549                 })
3550                 .always(function() {
3551                         if(typeof callback === "function")
3552                                 callback();
3553                 });
3554         }
3555
3556         NETDATA.dygraphInitialize = function(callback) {
3557                 if(typeof netdataNoDygraphs === 'undefined' || !netdataNoDygraphs) {
3558                         $.ajax({
3559                                 url: NETDATA.dygraph_js,
3560                                 cache: true,
3561                                 dataType: "script"
3562                         })
3563                         .done(function() {
3564                                 NETDATA.registerChartLibrary('dygraph', NETDATA.dygraph_js);
3565                         })
3566                         .fail(function() {
3567                                 NETDATA.chartLibraries.dygraph.enabled = false;
3568                                 NETDATA.error(100, NETDATA.dygraph_js);
3569                         })
3570                         .always(function() {
3571                                 if(NETDATA.chartLibraries.dygraph.enabled === true && NETDATA.options.current.smooth_plot === true)
3572                                         NETDATA.dygraphSmoothInitialize(callback);
3573                                 else if(typeof callback === "function")
3574                                         callback();
3575                         });
3576                 }
3577                 else {
3578                         NETDATA.chartLibraries.dygraph.enabled = false;
3579                         if(typeof callback === "function")
3580                                 callback();
3581                 }
3582         };
3583
3584         NETDATA.dygraphChartUpdate = function(state, data) {
3585                 var dygraph = state.dygraph_instance;
3586
3587                 if(typeof dygraph === 'undefined')
3588                         return NETDATA.dygraphChartCreate(state, data);
3589
3590                 // when the chart is not visible, and hidden
3591                 // if there is a window resize, dygraph detects
3592                 // its element size as 0x0.
3593                 // this will make it re-appear properly
3594
3595                 if(state.tm.last_unhidden > state.dygraph_last_rendered)
3596                         dygraph.resize();
3597
3598                 var options = {
3599                                 file: data.result.data,
3600                                 colors: state.chartColors(),
3601                                 labels: data.result.labels,
3602                                 labelsDivWidth: state.chartWidth() - 70,
3603                                 visibility: state.dimensions_visibility.selected2BooleanArray(state.data.dimension_names)
3604                 };
3605
3606                 if(state.dygraph_force_zoom === true) {
3607                         if(NETDATA.options.debug.dygraph === true || state.debug === true)
3608                                 state.log('dygraphChartUpdate() forced zoom update');
3609
3610                         options.dateWindow = (state.requested_padding !== null)?[ state.view_after, state.view_before ]:null;
3611                         options.valueRange = null;
3612                         options.isZoomedIgnoreProgrammaticZoom = true;
3613                         state.dygraph_force_zoom = false;
3614                 }
3615                 else if(state.current.name !== 'auto') {
3616                         if(NETDATA.options.debug.dygraph === true || state.debug === true)
3617                                 state.log('dygraphChartUpdate() loose update');
3618                 }
3619                 else {
3620                         if(NETDATA.options.debug.dygraph === true || state.debug === true)
3621                                 state.log('dygraphChartUpdate() strict update');
3622
3623                         options.dateWindow = (state.requested_padding !== null)?[ state.view_after, state.view_before ]:null;
3624                         options.valueRange = null;
3625                         options.isZoomedIgnoreProgrammaticZoom = true;
3626                 }
3627
3628                 if(state.dygraph_smooth_eligible === true) {
3629                         if((NETDATA.options.current.smooth_plot === true && state.dygraph_options.plotter !== smoothPlotter)
3630                                 || (NETDATA.options.current.smooth_plot === false && state.dygraph_options.plotter === smoothPlotter)) {
3631                                 NETDATA.dygraphChartCreate(state, data);
3632                                 return;
3633                         }
3634                 }
3635
3636                 dygraph.updateOptions(options);
3637
3638                 state.dygraph_last_rendered = new Date().getTime();
3639                 return true;
3640         };
3641
3642         NETDATA.dygraphChartCreate = function(state, data) {
3643                 if(NETDATA.options.debug.dygraph === true || state.debug === true)
3644                         state.log('dygraphChartCreate()');
3645
3646                 var self = $(state.element);
3647
3648                 var chart_type = state.chart.chart_type;
3649                 if(chart_type === 'stacked' && data.dimensions === 1) chart_type = 'area';
3650                 chart_type = self.data('dygraph-type') || chart_type;
3651
3652                 var smooth = (chart_type === 'line' && !NETDATA.chartLibraries.dygraph.isSparkline(state))?true:false;
3653                 smooth = self.data('dygraph-smooth') || smooth;
3654
3655                 if(NETDATA.dygraph.smooth === false)
3656                         smooth = false;
3657
3658                 var strokeWidth = (chart_type === 'stacked')?0.1:((smooth)?1.5:0.7)
3659                 var highlightCircleSize = (NETDATA.chartLibraries.dygraph.isSparkline(state))?3:4;
3660
3661                 state.dygraph_options = {
3662                         colors: self.data('dygraph-colors') || state.chartColors(),
3663
3664                         // leave a few pixels empty on the right of the chart
3665                         rightGap: self.data('dygraph-rightgap') || 5,
3666                         showRangeSelector: self.data('dygraph-showrangeselector') || false,
3667                         showRoller: self.data('dygraph-showroller') || false,
3668
3669                         title: self.data('dygraph-title') || state.title,
3670                         titleHeight: self.data('dygraph-titleheight') || 19,
3671
3672                         legend: self.data('dygraph-legend') || 'always', // 'onmouseover',
3673                         labels: data.result.labels,
3674                         labelsDiv: self.data('dygraph-labelsdiv') || state.element_legend_childs.hidden,
3675                         labelsDivStyles: self.data('dygraph-labelsdivstyles') || { 'fontSize':'1px' },
3676                         labelsDivWidth: self.data('dygraph-labelsdivwidth') || state.chartWidth() - 70,
3677                         labelsSeparateLines: self.data('dygraph-labelsseparatelines') || true,
3678                         labelsShowZeroValues: self.data('dygraph-labelsshowzerovalues') || true,
3679                         labelsKMB: false,
3680                         labelsKMG2: false,
3681                         showLabelsOnHighlight: self.data('dygraph-showlabelsonhighlight') || true,
3682                         hideOverlayOnMouseOut: self.data('dygraph-hideoverlayonmouseout') || true,
3683
3684                         ylabel: state.units,
3685                         yLabelWidth: self.data('dygraph-ylabelwidth') || 12,
3686
3687                         // the function to plot the chart
3688                         plotter: null,
3689
3690                         // The width of the lines connecting data points. This can be used to increase the contrast or some graphs.
3691                         strokeWidth: self.data('dygraph-strokewidth') || strokeWidth,
3692                         strokePattern: self.data('dygraph-strokepattern') || undefined,
3693
3694                         // The size of the dot to draw on each point in pixels (see drawPoints). A dot is always drawn when a point is "isolated",
3695                         // i.e. there is a missing point on either side of it. This also controls the size of those dots.
3696                         drawPoints: self.data('dygraph-drawpoints') || false,
3697
3698                         // Draw points at the edges of gaps in the data. This improves visibility of small data segments or other data irregularities.
3699                         drawGapEdgePoints: self.data('dygraph-drawgapedgepoints') || true,
3700
3701                         connectSeparatedPoints: self.data('dygraph-connectseparatedpoints') || false,
3702                         pointSize: self.data('dygraph-pointsize') || 1,
3703
3704                         // enabling this makes the chart with little square lines
3705                         stepPlot: self.data('dygraph-stepplot') || false,
3706
3707                         // Draw a border around graph lines to make crossing lines more easily distinguishable. Useful for graphs with many lines.
3708                         strokeBorderColor: self.data('dygraph-strokebordercolor') || NETDATA.themes.current.background,
3709                         strokeBorderWidth: self.data('dygraph-strokeborderwidth') || (chart_type === 'stacked')?0.0:0.0,
3710
3711                         fillGraph: self.data('dygraph-fillgraph') || (chart_type === 'area' || chart_type === 'stacked')?true:false,
3712                         fillAlpha: self.data('dygraph-fillalpha') || (chart_type === 'stacked')?NETDATA.options.current.color_fill_opacity_stacked:NETDATA.options.current.color_fill_opacity_area,
3713                         stackedGraph: self.data('dygraph-stackedgraph') || (chart_type === 'stacked')?true:false,
3714                         stackedGraphNaNFill: self.data('dygraph-stackedgraphnanfill') || 'none',
3715
3716                         drawAxis: self.data('dygraph-drawaxis') || true,
3717                         axisLabelFontSize: self.data('dygraph-axislabelfontsize') || 10,
3718                         axisLineColor: self.data('dygraph-axislinecolor') || NETDATA.themes.current.axis,
3719                         axisLineWidth: self.data('dygraph-axislinewidth') || 0.3,
3720
3721                         drawGrid: self.data('dygraph-drawgrid') || true,
3722                         drawXGrid: self.data('dygraph-drawxgrid') || undefined,
3723                         drawYGrid: self.data('dygraph-drawygrid') || undefined,
3724                         gridLinePattern: self.data('dygraph-gridlinepattern') || null,
3725                         gridLineWidth: self.data('dygraph-gridlinewidth') || 0.3,
3726                         gridLineColor: self.data('dygraph-gridlinecolor') || NETDATA.themes.current.grid,
3727
3728                         maxNumberWidth: self.data('dygraph-maxnumberwidth') || 8,
3729                         sigFigs: self.data('dygraph-sigfigs') || null,
3730                         digitsAfterDecimal: self.data('dygraph-digitsafterdecimal') || 2,
3731                         valueFormatter: self.data('dygraph-valueformatter') || function(x){ return x.toFixed(2); },
3732
3733                         highlightCircleSize: self.data('dygraph-highlightcirclesize') || highlightCircleSize,
3734                         highlightSeriesOpts: self.data('dygraph-highlightseriesopts') || null, // TOO SLOW: { strokeWidth: 1.5 },
3735                         highlightSeriesBackgroundAlpha: self.data('dygraph-highlightseriesbackgroundalpha') || null, // TOO SLOW: (chart_type === 'stacked')?0.7:0.5,
3736
3737                         pointClickCallback: self.data('dygraph-pointclickcallback') || undefined,
3738                         visibility: state.dimensions_visibility.selected2BooleanArray(state.data.dimension_names),
3739                         axes: {
3740                                 x: {
3741                                         pixelsPerLabel: 50,
3742                                         ticker: Dygraph.dateTicker,
3743                                         axisLabelFormatter: function (d, gran) {
3744                                                 return NETDATA.zeropad(d.getHours()) + ":" + NETDATA.zeropad(d.getMinutes()) + ":" + NETDATA.zeropad(d.getSeconds());
3745                                         },
3746                                         valueFormatter: function (ms) {
3747                                                 var d = new Date(ms);
3748                                                 return d.toLocaleDateString() + ' ' + d.toLocaleTimeString();
3749                                                 // return NETDATA.zeropad(d.getHours()) + ":" + NETDATA.zeropad(d.getMinutes()) + ":" + NETDATA.zeropad(d.getSeconds());
3750                                         }
3751                                 },
3752                                 y: {
3753                                         pixelsPerLabel: 15,
3754                                         valueFormatter: function (x) {
3755                                                 // we format legends with the state object
3756                                                 // no need to do anything here
3757                                                 // return (Math.round(x*100) / 100).toLocaleString();
3758                                                 // return state.legendFormatValue(x);
3759                                                 return x;
3760                                         }
3761                                 }
3762                         },
3763                         legendFormatter: function(data) {
3764                                 var elements = state.element_legend_childs;
3765
3766                                 // if the hidden div is not there
3767                                 // we are not managing the legend
3768                                 if(elements.hidden === null) return;
3769
3770                                 if (typeof data.x !== 'undefined') {
3771                                         state.legendSetDate(data.x);
3772                                         var i = data.series.length;
3773                                         while(i--) {
3774                                                 var series = data.series[i];
3775                                                 if(!series.isVisible) continue;
3776                                                 state.legendSetLabelValue(series.label, series.y);
3777                                         }
3778                                 }
3779
3780                                 return '';
3781                         },
3782                         drawCallback: function(dygraph, is_initial) {
3783                                 if(state.current.name !== 'auto' && state.dygraph_user_action === true) {
3784                                         state.dygraph_user_action = false;
3785
3786                                         var x_range = dygraph.xAxisRange();
3787                                         var after = Math.round(x_range[0]);
3788                                         var before = Math.round(x_range[1]);
3789
3790                                         if(NETDATA.options.debug.dygraph === true)
3791                                                 state.log('dygraphDrawCallback(dygraph, ' + is_initial + '): ' + (after / 1000).toString() + ' - ' + (before / 1000).toString());
3792
3793                                         if(before <= state.netdata_last && after >= state.netdata_first)
3794                                                 state.updateChartPanOrZoom(after, before);
3795                                 }
3796                         },
3797                         zoomCallback: function(minDate, maxDate, yRanges) {
3798                                 if(NETDATA.options.debug.dygraph === true)
3799                                         state.log('dygraphZoomCallback()');
3800
3801                                 state.globalSelectionSyncStop();
3802                                 state.globalSelectionSyncDelay();
3803                                 state.setMode('zoom');
3804
3805                                 // refresh it to the greatest possible zoom level
3806                                 state.dygraph_user_action = true;
3807                                 state.dygraph_force_zoom = true;
3808                                 state.updateChartPanOrZoom(minDate, maxDate);
3809                         },
3810                         highlightCallback: function(event, x, points, row, seriesName) {
3811                                 if(NETDATA.options.debug.dygraph === true || state.debug === true)
3812                                         state.log('dygraphHighlightCallback()');
3813
3814                                 state.pauseChart();
3815
3816                                 // there is a bug in dygraph when the chart is zoomed enough
3817                                 // the time it thinks is selected is wrong
3818                                 // here we calculate the time t based on the row number selected
3819                                 // which is ok
3820                                 var t = state.data_after + row * state.data_update_every;
3821                                 // console.log('row = ' + row + ', x = ' + x + ', t = ' + t + ' ' + ((t === x)?'SAME':(Math.abs(x-t)<=state.data_update_every)?'SIMILAR':'DIFFERENT') + ', rows in db: ' + state.data_points + ' visible(x) = ' + state.timeIsVisible(x) + ' visible(t) = ' + state.timeIsVisible(t) + ' r(x) = ' + state.calculateRowForTime(x) + ' r(t) = ' + state.calculateRowForTime(t) + ' range: ' + state.data_after + ' - ' + state.data_before + ' real: ' + state.data.after + ' - ' + state.data.before + ' every: ' + state.data_update_every);
3822
3823                                 state.globalSelectionSync(x);
3824
3825                                 // fix legend zIndex using the internal structures of dygraph legend module
3826                                 // this works, but it is a hack!
3827                                 // state.dygraph_instance.plugins_[0].plugin.legend_div_.style.zIndex = 10000;
3828                         },
3829                         unhighlightCallback: function(event) {
3830                                 if(NETDATA.options.debug.dygraph === true || state.debug === true)
3831                                         state.log('dygraphUnhighlightCallback()');
3832
3833                                 state.unpauseChart();
3834                                 state.globalSelectionSyncStop();
3835                         },
3836                         interactionModel : {
3837                                 mousedown: function(event, dygraph, context) {
3838                                         if(NETDATA.options.debug.dygraph === true || state.debug === true)
3839                                                 state.log('interactionModel.mousedown()');
3840
3841                                         state.dygraph_user_action = true;
3842                                         state.globalSelectionSyncStop();
3843
3844                                         if(NETDATA.options.debug.dygraph === true)
3845                                                 state.log('dygraphMouseDown()');
3846
3847                                         // Right-click should not initiate a zoom.
3848                                         if(event.button && event.button === 2) return;
3849
3850                                         context.initializeMouseDown(event, dygraph, context);
3851
3852                                         if(event.button && event.button === 1) {
3853                                                 if (event.altKey || event.shiftKey) {
3854                                                         state.setMode('pan');
3855                                                         state.globalSelectionSyncDelay();
3856                                                         Dygraph.startPan(event, dygraph, context);
3857                                                 }
3858                                                 else {
3859                                                         state.setMode('zoom');
3860                                                         state.globalSelectionSyncDelay();
3861                                                         Dygraph.startZoom(event, dygraph, context);
3862                                                 }
3863                                         }
3864                                         else {
3865                                                 if (event.altKey || event.shiftKey) {
3866                                                         state.setMode('zoom');
3867                                                         state.globalSelectionSyncDelay();
3868                                                         Dygraph.startZoom(event, dygraph, context);
3869                                                 }
3870                                                 else {
3871                                                         state.setMode('pan');
3872                                                         state.globalSelectionSyncDelay();
3873                                                         Dygraph.startPan(event, dygraph, context);
3874                                                 }
3875                                         }
3876                                 },
3877                                 mousemove: function(event, dygraph, context) {
3878                                         if(NETDATA.options.debug.dygraph === true || state.debug === true)
3879                                                 state.log('interactionModel.mousemove()');
3880
3881                                         if(context.isPanning) {
3882                                                 state.dygraph_user_action = true;
3883                                                 state.globalSelectionSyncStop();
3884                                                 state.globalSelectionSyncDelay();
3885                                                 state.setMode('pan');
3886                                                 Dygraph.movePan(event, dygraph, context);
3887                                         }
3888                                         else if(context.isZooming) {
3889                                                 state.dygraph_user_action = true;
3890                                                 state.globalSelectionSyncStop();
3891                                                 state.globalSelectionSyncDelay();
3892                                                 state.setMode('zoom');
3893                                                 Dygraph.moveZoom(event, dygraph, context);
3894                                         }
3895                                 },
3896                                 mouseup: function(event, dygraph, context) {
3897                                         if(NETDATA.options.debug.dygraph === true || state.debug === true)
3898                                                 state.log('interactionModel.mouseup()');
3899
3900                                         if (context.isPanning) {
3901                                                 state.dygraph_user_action = true;
3902                                                 state.globalSelectionSyncDelay();
3903                                                 Dygraph.endPan(event, dygraph, context);
3904                                         }
3905                                         else if (context.isZooming) {
3906                                                 state.dygraph_user_action = true;
3907                                                 state.globalSelectionSyncDelay();
3908                                                 Dygraph.endZoom(event, dygraph, context);
3909                                         }
3910                                 },
3911                                 click: function(event, dygraph, context) {
3912                                         if(NETDATA.options.debug.dygraph === true || state.debug === true)
3913                                                 state.log('interactionModel.click()');
3914
3915                                         event.preventDefault();
3916                                 },
3917                                 dblclick: function(event, dygraph, context) {
3918                                         if(NETDATA.options.debug.dygraph === true || state.debug === true)
3919                                                 state.log('interactionModel.dblclick()');
3920                                         NETDATA.resetAllCharts(state);
3921                                 },
3922                                 mousewheel: function(event, dygraph, context) {
3923                                         if(NETDATA.options.debug.dygraph === true || state.debug === true)
3924                                                 state.log('interactionModel.mousewheel()');
3925
3926                                         // Take the offset of a mouse event on the dygraph canvas and
3927                                         // convert it to a pair of percentages from the bottom left.
3928                                         // (Not top left, bottom is where the lower value is.)
3929                                         function offsetToPercentage(g, offsetX, offsetY) {
3930                                                 // This is calculating the pixel offset of the leftmost date.
3931                                                 var xOffset = g.toDomCoords(g.xAxisRange()[0], null)[0];
3932                                                 var yar0 = g.yAxisRange(0);
3933
3934                                                 // This is calculating the pixel of the higest value. (Top pixel)
3935                                                 var yOffset = g.toDomCoords(null, yar0[1])[1];
3936
3937                                                 // x y w and h are relative to the corner of the drawing area,
3938                                                 // so that the upper corner of the drawing area is (0, 0).
3939                                                 var x = offsetX - xOffset;
3940                                                 var y = offsetY - yOffset;
3941
3942                                                 // This is computing the rightmost pixel, effectively defining the
3943                                                 // width.
3944                                                 var w = g.toDomCoords(g.xAxisRange()[1], null)[0] - xOffset;
3945
3946                                                 // This is computing the lowest pixel, effectively defining the height.
3947                                                 var h = g.toDomCoords(null, yar0[0])[1] - yOffset;
3948
3949                                                 // Percentage from the left.
3950                                                 var xPct = w === 0 ? 0 : (x / w);
3951                                                 // Percentage from the top.
3952                                                 var yPct = h === 0 ? 0 : (y / h);
3953
3954                                                 // The (1-) part below changes it from "% distance down from the top"
3955                                                 // to "% distance up from the bottom".
3956                                                 return [xPct, (1-yPct)];
3957                                         }
3958
3959                                         // Adjusts [x, y] toward each other by zoomInPercentage%
3960                                         // Split it so the left/bottom axis gets xBias/yBias of that change and
3961                                         // tight/top gets (1-xBias)/(1-yBias) of that change.
3962                                         //
3963                                         // If a bias is missing it splits it down the middle.
3964                                         function zoomRange(g, zoomInPercentage, xBias, yBias) {
3965                                                 xBias = xBias || 0.5;
3966                                                 yBias = yBias || 0.5;
3967
3968                                                 function adjustAxis(axis, zoomInPercentage, bias) {
3969                                                         var delta = axis[1] - axis[0];
3970                                                         var increment = delta * zoomInPercentage;
3971                                                         var foo = [increment * bias, increment * (1-bias)];
3972
3973                                                         return [ axis[0] + foo[0], axis[1] - foo[1] ];
3974                                                 }
3975
3976                                                 var yAxes = g.yAxisRanges();
3977                                                 var newYAxes = [];
3978                                                 for (var i = 0; i < yAxes.length; i++) {
3979                                                         newYAxes[i] = adjustAxis(yAxes[i], zoomInPercentage, yBias);
3980                                                 }
3981
3982                                                 return adjustAxis(g.xAxisRange(), zoomInPercentage, xBias);
3983                                         }
3984
3985                                         if(event.altKey || event.shiftKey) {
3986                                                 state.dygraph_user_action = true;
3987
3988                                                 state.globalSelectionSyncStop();
3989                                                 state.globalSelectionSyncDelay();
3990
3991                                                 // http://dygraphs.com/gallery/interaction-api.js
3992                                                 var normal = (event.detail) ? event.detail * -1 : event.wheelDelta / 40;
3993                                                 var percentage = normal / 50;
3994
3995                                                 if (!(event.offsetX && event.offsetY)){
3996                                                         event.offsetX = event.layerX - event.target.offsetLeft;
3997                                                         event.offsetY = event.layerY - event.target.offsetTop;
3998                                                 }
3999
4000                                                 var percentages = offsetToPercentage(dygraph, event.offsetX, event.offsetY);
4001                                                 var xPct = percentages[0];
4002                                                 var yPct = percentages[1];
4003
4004                                                 var new_x_range = zoomRange(dygraph, percentage, xPct, yPct);
4005
4006                                                 var after = new_x_range[0];
4007                                                 var before = new_x_range[1];
4008
4009                                                 var first = state.netdata_first + state.data_update_every;
4010                                                 var last = state.netdata_last + state.data_update_every;
4011
4012                                                 if(before > last) {
4013                                                         after -= (before - last);
4014                                                         before = last;
4015                                                 }
4016                                                 if(after < first) {
4017                                                         after = first;
4018                                                 }
4019
4020                                                 state.setMode('zoom');
4021                                                 if(state.updateChartPanOrZoom(after, before) === true)
4022                                                         dygraph.updateOptions({ dateWindow: [ after, before ] });
4023
4024                                                 event.preventDefault();
4025                                         }
4026                                 },
4027                                 touchstart: function(event, dygraph, context) {
4028                                         if(NETDATA.options.debug.dygraph === true || state.debug === true)
4029                                                 state.log('interactionModel.touchstart()');
4030
4031                                         state.dygraph_user_action = true;
4032                                         state.setMode('zoom');
4033                                         state.pauseChart();
4034
4035                                         Dygraph.defaultInteractionModel.touchstart(event, dygraph, context);
4036
4037                                         // we overwrite the touch directions at the end, to overwrite
4038                                         // the internal default of dygraphs
4039                                         context.touchDirections = { x: true, y: false };
4040
4041                                         state.dygraph_last_touch_start = new Date().getTime();
4042                                         state.dygraph_last_touch_move = 0;
4043
4044                                         if(typeof event.touches[0].pageX === 'number')
4045                                                 state.dygraph_last_touch_page_x = event.touches[0].pageX;
4046                                         else
4047                                                 state.dygraph_last_touch_page_x = 0;
4048                                 },
4049                                 touchmove: function(event, dygraph, context) {
4050                                         if(NETDATA.options.debug.dygraph === true || state.debug === true)
4051                                                 state.log('interactionModel.touchmove()');
4052
4053                                         state.dygraph_user_action = true;
4054                                         Dygraph.defaultInteractionModel.touchmove(event, dygraph, context);
4055
4056                                         state.dygraph_last_touch_move = new Date().getTime();
4057                                 },
4058                                 touchend: function(event, dygraph, context) {
4059                                         if(NETDATA.options.debug.dygraph === true || state.debug === true)
4060                                                 state.log('interactionModel.touchend()');
4061
4062                                         state.dygraph_user_action = true;
4063                                         Dygraph.defaultInteractionModel.touchend(event, dygraph, context);
4064
4065                                         // if it didn't move, it is a selection
4066                                         if(state.dygraph_last_touch_move === 0 && state.dygraph_last_touch_page_x !== 0) {
4067                                                 // internal api of dygraphs
4068                                                 var pct = (state.dygraph_last_touch_page_x - (dygraph.plotter_.area.x + state.element.getBoundingClientRect().left)) / dygraph.plotter_.area.w;
4069                                                 var t = Math.round(state.data_after + (state.data_before - state.data_after) * pct);
4070                                                 if(NETDATA.dygraphSetSelection(state, t) === true)
4071                                                         state.globalSelectionSync(t);
4072                                         }
4073
4074                                         // if it was double tap within double click time, reset the charts
4075                                         var now = new Date().getTime();
4076                                         if(typeof state.dygraph_last_touch_end !== 'undefined') {
4077                                                 if(state.dygraph_last_touch_move === 0) {
4078                                                         var dt = now - state.dygraph_last_touch_end;
4079                                                         if(dt <= NETDATA.options.current.double_click_speed)
4080                                                                 NETDATA.resetAllCharts(state);
4081                                                 }
4082                                         }
4083
4084                                         // remember the timestamp of the last touch end
4085                                         state.dygraph_last_touch_end = now;
4086                                 }
4087                         }
4088                 };
4089
4090                 if(NETDATA.chartLibraries.dygraph.isSparkline(state)) {
4091                         state.dygraph_options.drawGrid = false;
4092                         state.dygraph_options.drawAxis = false;
4093                         state.dygraph_options.title = undefined;
4094                         state.dygraph_options.units = undefined;
4095                         state.dygraph_options.ylabel = undefined;
4096                         state.dygraph_options.yLabelWidth = 0;
4097                         state.dygraph_options.labelsDivWidth = 120;
4098                         state.dygraph_options.labelsDivStyles.width = '120px';
4099                         state.dygraph_options.labelsSeparateLines = true;
4100                         state.dygraph_options.rightGap = 0;
4101                 }
4102
4103                 if(smooth === true) {
4104                         state.dygraph_smooth_eligible = true;
4105
4106                         if(NETDATA.options.current.smooth_plot === true)
4107                                 state.dygraph_options.plotter = smoothPlotter;
4108                 }
4109                 else state.dygraph_smooth_eligible = false;
4110
4111                 state.dygraph_instance = new Dygraph(state.element_chart,
4112                         data.result.data, state.dygraph_options);
4113
4114                 state.dygraph_force_zoom = false;
4115                 state.dygraph_user_action = false;
4116                 state.dygraph_last_rendered = new Date().getTime();
4117                 return true;
4118         };
4119
4120         // ----------------------------------------------------------------------------------------------------------------
4121         // morris
4122
4123         NETDATA.morrisInitialize = function(callback) {
4124                 if(typeof netdataNoMorris === 'undefined' || !netdataNoMorris) {
4125
4126                         // morris requires raphael
4127                         if(!NETDATA.chartLibraries.raphael.initialized) {
4128                                 if(NETDATA.chartLibraries.raphael.enabled) {
4129                                         NETDATA.raphaelInitialize(function() {
4130                                                 NETDATA.morrisInitialize(callback);
4131                                         });
4132                                 }
4133                                 else {
4134                                         NETDATA.chartLibraries.morris.enabled = false;
4135                                         if(typeof callback === "function")
4136                                                 callback();
4137                                 }
4138                         }
4139                         else {
4140                                 NETDATA._loadCSS(NETDATA.morris_css);
4141
4142                                 $.ajax({
4143                                         url: NETDATA.morris_js,
4144                                         cache: true,
4145                                         dataType: "script"
4146                                 })
4147                                 .done(function() {
4148                                         NETDATA.registerChartLibrary('morris', NETDATA.morris_js);
4149                                 })
4150                                 .fail(function() {
4151                                         NETDATA.chartLibraries.morris.enabled = false;
4152                                         NETDATA.error(100, NETDATA.morris_js);
4153                                 })
4154                                 .always(function() {
4155                                         if(typeof callback === "function")
4156                                                 callback();
4157                                 });
4158                         }
4159                 }
4160                 else {
4161                         NETDATA.chartLibraries.morris.enabled = false;
4162                         if(typeof callback === "function")
4163                                 callback();
4164                 }
4165         };
4166
4167         NETDATA.morrisChartUpdate = function(state, data) {
4168                 state.morris_instance.setData(data.result.data);
4169                 return true;
4170         };
4171
4172         NETDATA.morrisChartCreate = function(state, data) {
4173
4174                 state.morris_options = {
4175                                 element: state.element_chart.id,
4176                                 data: data.result.data,
4177                                 xkey: 'time',
4178                                 ykeys: data.dimension_names,
4179                                 labels: data.dimension_names,
4180                                 lineWidth: 2,
4181                                 pointSize: 3,
4182                                 smooth: true,
4183                                 hideHover: 'auto',
4184                                 parseTime: true,
4185                                 continuousLine: false,
4186                                 behaveLikeLine: false
4187                 };
4188
4189                 if(state.chart.chart_type === 'line')
4190                         state.morris_instance = new Morris.Line(state.morris_options);
4191
4192                 else if(state.chart.chart_type === 'area') {
4193                         state.morris_options.behaveLikeLine = true;
4194                         state.morris_instance = new Morris.Area(state.morris_options);
4195                 }
4196                 else // stacked
4197                         state.morris_instance = new Morris.Area(state.morris_options);
4198
4199                 return true;
4200         };
4201
4202         // ----------------------------------------------------------------------------------------------------------------
4203         // raphael
4204
4205         NETDATA.raphaelInitialize = function(callback) {
4206                 if(typeof netdataStopRaphael === 'undefined' || !netdataStopRaphael) {
4207                         $.ajax({
4208                                 url: NETDATA.raphael_js,
4209                                 cache: true,
4210                                 dataType: "script"
4211                         })
4212                         .done(function() {
4213                                 NETDATA.registerChartLibrary('raphael', NETDATA.raphael_js);
4214                         })
4215                         .fail(function() {
4216                                 NETDATA.chartLibraries.raphael.enabled = false;
4217                                 NETDATA.error(100, NETDATA.raphael_js);
4218                         })
4219                         .always(function() {
4220                                 if(typeof callback === "function")
4221                                         callback();
4222                         });
4223                 }
4224                 else {
4225                         NETDATA.chartLibraries.raphael.enabled = false;
4226                         if(typeof callback === "function")
4227                                 callback();
4228                 }
4229         };
4230
4231         NETDATA.raphaelChartUpdate = function(state, data) {
4232                 $(state.element_chart).raphael(data.result, {
4233                         width: state.chartWidth(),
4234                         height: state.chartHeight()
4235                 });
4236
4237                 return false;
4238         };
4239
4240         NETDATA.raphaelChartCreate = function(state, data) {
4241                 $(state.element_chart).raphael(data.result, {
4242                         width: state.chartWidth(),
4243                         height: state.chartHeight()
4244                 });
4245
4246                 return false;
4247         };
4248
4249         // ----------------------------------------------------------------------------------------------------------------
4250         // C3
4251
4252         NETDATA.c3Initialize = function(callback) {
4253                 if(typeof netdataNoC3 === 'undefined' || !netdataNoC3) {
4254
4255                         // C3 requires D3
4256                         if(!NETDATA.chartLibraries.d3.initialized) {
4257                                 if(NETDATA.chartLibraries.d3.enabled) {
4258                                         NETDATA.d3Initialize(function() {
4259                                                 NETDATA.c3Initialize(callback);
4260                                         });
4261                                 }
4262                                 else {
4263                                         NETDATA.chartLibraries.c3.enabled = false;
4264                                         if(typeof callback === "function")
4265                                                 callback();
4266                                 }
4267                         }
4268                         else {
4269                                 NETDATA._loadCSS(NETDATA.c3_css);
4270
4271                                 $.ajax({
4272                                         url: NETDATA.c3_js,
4273                                         cache: true,
4274                                         dataType: "script"
4275                                 })
4276                                 .done(function() {
4277                                         NETDATA.registerChartLibrary('c3', NETDATA.c3_js);
4278                                 })
4279                                 .fail(function() {
4280                                         NETDATA.chartLibraries.c3.enabled = false;
4281                                         NETDATA.error(100, NETDATA.c3_js);
4282                                 })
4283                                 .always(function() {
4284                                         if(typeof callback === "function")
4285                                                 callback();
4286                                 });
4287                         }
4288                 }
4289                 else {
4290                         NETDATA.chartLibraries.c3.enabled = false;
4291                         if(typeof callback === "function")
4292                                 callback();
4293                 }
4294         };
4295
4296         NETDATA.c3ChartUpdate = function(state, data) {
4297                 state.c3_instance.destroy();
4298                 return NETDATA.c3ChartCreate(state, data);
4299
4300                 //state.c3_instance.load({
4301                 //      rows: data.result,
4302                 //      unload: true
4303                 //});
4304
4305                 //return true;
4306         };
4307
4308         NETDATA.c3ChartCreate = function(state, data) {
4309
4310                 state.element_chart.id = 'c3-' + state.uuid;
4311                 // console.log('id = ' + state.element_chart.id);
4312
4313                 state.c3_instance = c3.generate({
4314                         bindto: '#' + state.element_chart.id,
4315                         size: {
4316                                 width: state.chartWidth(),
4317                                 height: state.chartHeight()
4318                         },
4319                         color: {
4320                                 pattern: state.chartColors()
4321                         },
4322                         data: {
4323                                 x: 'time',
4324                                 rows: data.result,
4325                                 type: (state.chart.chart_type === 'line')?'spline':'area-spline'
4326                         },
4327                         axis: {
4328                                 x: {
4329                                         type: 'timeseries',
4330                                         tick: {
4331                                                 format: function(x) {
4332                                                         return NETDATA.zeropad(x.getHours()) + ":" + NETDATA.zeropad(x.getMinutes()) + ":" + NETDATA.zeropad(x.getSeconds());
4333                                                 }
4334                                         }
4335                                 }
4336                         },
4337                         grid: {
4338                                 x: {
4339                                         show: true
4340                                 },
4341                                 y: {
4342                                         show: true
4343                                 }
4344                         },
4345                         point: {
4346                                 show: false
4347                         },
4348                         line: {
4349                                 connectNull: false
4350                         },
4351                         transition: {
4352                                 duration: 0
4353                         },
4354                         interaction: {
4355                                 enabled: true
4356                         }
4357                 });
4358
4359                 // console.log(state.c3_instance);
4360
4361                 return true;
4362         };
4363
4364         // ----------------------------------------------------------------------------------------------------------------
4365         // D3
4366
4367         NETDATA.d3Initialize = function(callback) {
4368                 if(typeof netdataStopD3 === 'undefined' || !netdataStopD3) {
4369                         $.ajax({
4370                                 url: NETDATA.d3_js,
4371                                 cache: true,
4372                                 dataType: "script"
4373                         })
4374                         .done(function() {
4375                                 NETDATA.registerChartLibrary('d3', NETDATA.d3_js);
4376                         })
4377                         .fail(function() {
4378                                 NETDATA.chartLibraries.d3.enabled = false;
4379                                 NETDATA.error(100, NETDATA.d3_js);
4380                         })
4381                         .always(function() {
4382                                 if(typeof callback === "function")
4383                                         callback();
4384                         });
4385                 }
4386                 else {
4387                         NETDATA.chartLibraries.d3.enabled = false;
4388                         if(typeof callback === "function")
4389                                 callback();
4390                 }
4391         };
4392
4393         NETDATA.d3ChartUpdate = function(state, data) {
4394                 return false;
4395         };
4396
4397         NETDATA.d3ChartCreate = function(state, data) {
4398                 return false;
4399         };
4400
4401         // ----------------------------------------------------------------------------------------------------------------
4402         // google charts
4403
4404         NETDATA.googleInitialize = function(callback) {
4405                 if(typeof netdataNoGoogleCharts === 'undefined' || !netdataNoGoogleCharts) {
4406                         $.ajax({
4407                                 url: NETDATA.google_js,
4408                                 cache: true,
4409                                 dataType: "script"
4410                         })
4411                         .done(function() {
4412                                 NETDATA.registerChartLibrary('google', NETDATA.google_js);
4413                                 google.load('visualization', '1.1', {
4414                                         'packages': ['corechart', 'controls'],
4415                                         'callback': callback
4416                                 });
4417                         })
4418                         .fail(function() {
4419                                 NETDATA.chartLibraries.google.enabled = false;
4420                                 NETDATA.error(100, NETDATA.google_js);
4421                                 if(typeof callback === "function")
4422                                         callback();
4423                         });
4424                 }
4425                 else {
4426                         NETDATA.chartLibraries.google.enabled = false;
4427                         if(typeof callback === "function")
4428                                 callback();
4429                 }
4430         };
4431
4432         NETDATA.googleChartUpdate = function(state, data) {
4433                 var datatable = new google.visualization.DataTable(data.result);
4434                 state.google_instance.draw(datatable, state.google_options);
4435                 return true;
4436         };
4437
4438         NETDATA.googleChartCreate = function(state, data) {
4439                 var datatable = new google.visualization.DataTable(data.result);
4440
4441                 state.google_options = {
4442                         colors: state.chartColors(),
4443
4444                         // do not set width, height - the chart resizes itself
4445                         //width: state.chartWidth(),
4446                         //height: state.chartHeight(),
4447                         lineWidth: 1,
4448                         title: state.title,
4449                         fontSize: 11,
4450                         hAxis: {
4451                         //      title: "Time of Day",
4452                         //      format:'HH:mm:ss',
4453                                 viewWindowMode: 'maximized',
4454                                 slantedText: false,
4455                                 format:'HH:mm:ss',
4456                                 textStyle: {
4457                                         fontSize: 9
4458                                 },
4459                                 gridlines: {
4460                                         color: '#EEE'
4461                                 }
4462                         },
4463                         vAxis: {
4464                                 title: state.units,
4465                                 viewWindowMode: 'pretty',
4466                                 minValue: -0.1,
4467                                 maxValue: 0.1,
4468                                 direction: 1,
4469                                 textStyle: {
4470                                         fontSize: 9
4471                                 },
4472                                 gridlines: {
4473                                         color: '#EEE'
4474                                 }
4475                         },
4476                         chartArea: {
4477                                 width: '65%',
4478                                 height: '80%'
4479                         },
4480                         focusTarget: 'category',
4481                         annotation: {
4482                                 '1': {
4483                                         style: 'line'
4484                                 }
4485                         },
4486                         pointsVisible: 0,
4487                         titlePosition: 'out',
4488                         titleTextStyle: {
4489                                 fontSize: 11
4490                         },
4491                         tooltip: {
4492                                 isHtml: false,
4493                                 ignoreBounds: true,
4494                                 textStyle: {
4495                                         fontSize: 9
4496                                 }
4497                         },
4498                         curveType: 'function',
4499                         areaOpacity: 0.3,
4500                         isStacked: false
4501                 };
4502
4503                 switch(state.chart.chart_type) {
4504                         case "area":
4505                                 state.google_options.vAxis.viewWindowMode = 'maximized';
4506                                 state.google_options.areaOpacity = NETDATA.options.current.color_fill_opacity_area;
4507                                 state.google_instance = new google.visualization.AreaChart(state.element_chart);
4508                                 break;
4509
4510                         case "stacked":
4511                                 state.google_options.isStacked = true;
4512                                 state.google_options.areaOpacity = NETDATA.options.current.color_fill_opacity_stacked;
4513                                 state.google_options.vAxis.viewWindowMode = 'maximized';
4514                                 state.google_options.vAxis.minValue = null;
4515                                 state.google_options.vAxis.maxValue = null;
4516                                 state.google_instance = new google.visualization.AreaChart(state.element_chart);
4517                                 break;
4518
4519                         default:
4520                         case "line":
4521                                 state.google_options.lineWidth = 2;
4522                                 state.google_instance = new google.visualization.LineChart(state.element_chart);
4523                                 break;
4524                 }
4525
4526                 state.google_instance.draw(datatable, state.google_options);
4527                 return true;
4528         };
4529
4530         // ----------------------------------------------------------------------------------------------------------------
4531
4532         NETDATA.percentFromValueMax = function(value, max) {
4533                 if(value === null) value = 0;
4534                 if(max < value) max = value;
4535
4536                 var pcent = 0;
4537                 if(max !== 0) {
4538                         pcent = Math.round(value * 100 / max);
4539                         if(pcent === 0 && value > 0) pcent = 1;
4540                 }
4541
4542                 return pcent;
4543         }
4544
4545         // ----------------------------------------------------------------------------------------------------------------
4546         // easy-pie-chart
4547
4548         NETDATA.easypiechartInitialize = function(callback) {
4549                 if(typeof netdataNoEasyPieChart === 'undefined' || !netdataNoEasyPieChart) {
4550                         $.ajax({
4551                                 url: NETDATA.easypiechart_js,
4552                                 cache: true,
4553                                 dataType: "script"
4554                         })
4555                                 .done(function() {
4556                                         NETDATA.registerChartLibrary('easypiechart', NETDATA.easypiechart_js);
4557                                 })
4558                                 .fail(function() {
4559                                         NETDATA.chartLibraries.easypiechart.enabled = false;
4560                                         NETDATA.error(100, NETDATA.easypiechart_js);
4561                                 })
4562                                 .always(function() {
4563                                         if(typeof callback === "function")
4564                                                 callback();
4565                                 })
4566                 }
4567                 else {
4568                         NETDATA.chartLibraries.easypiechart.enabled = false;
4569                         if(typeof callback === "function")
4570                                 callback();
4571                 }
4572         };
4573
4574         NETDATA.easypiechartClearSelection = function(state) {
4575                 if(typeof state.easyPieChartEvent !== 'undefined') {
4576                         if(state.easyPieChartEvent.timer !== null)
4577                                 clearTimeout(state.easyPieChartEvent.timer);
4578
4579                         state.easyPieChartEvent.timer = null;
4580                 }
4581
4582                 if(state.isAutoRefreshed() === true && state.data !== null) {
4583                         NETDATA.easypiechartChartUpdate(state, state.data);
4584                 }
4585                 else {
4586                         state.easyPieChartLabel.innerHTML = state.legendFormatValue(null);
4587                         state.easyPieChart_instance.update(0);
4588                 }
4589                 state.easyPieChart_instance.enableAnimation();
4590
4591                 return true;
4592         };
4593
4594         NETDATA.easypiechartSetSelection = function(state, t) {
4595                 if(state.timeIsVisible(t) !== true)
4596                         return NETDATA.easypiechartClearSelection(state);
4597
4598                 var slot = state.calculateRowForTime(t);
4599                 if(slot < 0 || slot >= state.data.result.length)
4600                         return NETDATA.easypiechartClearSelection(state);
4601
4602                 if(typeof state.easyPieChartEvent === 'undefined') {
4603                         state.easyPieChartEvent = {
4604                                 timer: null,
4605                                 value: 0,
4606                                 pcent: 0,
4607                         };
4608                 }
4609
4610                 var value = state.data.result[state.data.result.length - 1 - slot];
4611                 var max = (state.easyPieChartMax === null)?state.data.max:state.easyPieChartMax;
4612                 var pcent = NETDATA.percentFromValueMax(value, max);
4613
4614                 state.easyPieChartEvent.value = value;
4615                 state.easyPieChartEvent.pcent = pcent;
4616                 state.easyPieChartLabel.innerHTML = state.legendFormatValue(value);
4617
4618                 if(state.easyPieChartEvent.timer === null) {
4619                         state.easyPieChart_instance.disableAnimation();
4620
4621                         state.easyPieChartEvent.timer = setTimeout(function() {
4622                                 state.easyPieChartEvent.timer = null;
4623                                 state.easyPieChart_instance.update(state.easyPieChartEvent.pcent);
4624                         }, NETDATA.options.current.charts_selection_animation_delay);
4625                 }
4626
4627                 return true;
4628         };
4629
4630         NETDATA.easypiechartChartUpdate = function(state, data) {
4631                 var value, max, pcent;
4632
4633                 if(NETDATA.globalPanAndZoom.isActive() === true || state.isAutoRefreshed() === false) {
4634                         value = null;
4635                         max = 0;
4636                         pcent = 0;
4637                 }
4638                 else {
4639                         value = data.result[0];
4640                         max = (state.easyPieChartMax === null)?data.max:state.easyPieChartMax;
4641                         pcent = NETDATA.percentFromValueMax(value, max);
4642                 }
4643
4644                 state.easyPieChartLabel.innerHTML = state.legendFormatValue(value);
4645                 state.easyPieChart_instance.update(pcent);
4646                 return true;
4647         };
4648
4649         NETDATA.easypiechartChartCreate = function(state, data) {
4650                 var self = $(state.element);
4651                 var chart = $(state.element_chart);
4652
4653                 var value = data.result[0];
4654                 var max = self.data('easypiechart-max-value') || null;
4655                 var adjust = self.data('easypiechart-adjust') || null;
4656
4657                 if(max === null) {
4658                         max = data.max;
4659                         state.easyPieChartMax = null;
4660                 }
4661                 else
4662                         state.easyPieChartMax = max;
4663
4664                 var pcent = NETDATA.percentFromValueMax(value, max);
4665
4666                 chart.data('data-percent', pcent);
4667
4668                 var size;
4669                 switch(adjust) {
4670                         case 'width': size = state.chartHeight(); break;
4671                         case 'min': size = Math.min(state.chartWidth(), state.chartHeight()); break;
4672                         case 'max': size = Math.max(state.chartWidth(), state.chartHeight()); break;
4673                         case 'height':
4674                         default: size = state.chartWidth(); break;
4675                 }
4676                 state.element.style.width = size + 'px';
4677                 state.element.style.height = size + 'px';
4678
4679                 var stroke = Math.floor(size / 22);
4680                 if(stroke < 3) stroke = 2;
4681
4682                 var valuefontsize = Math.floor((size * 2 / 3) / 5);
4683                 var valuetop = Math.round((size - valuefontsize - (size / 40)) / 2);
4684                 state.easyPieChartLabel = document.createElement('span');
4685                 state.easyPieChartLabel.className = 'easyPieChartLabel';
4686                 state.easyPieChartLabel.innerHTML = state.legendFormatValue(value);
4687                 state.easyPieChartLabel.style.fontSize = valuefontsize + 'px';
4688                 state.easyPieChartLabel.style.top = valuetop.toString() + 'px';
4689                 state.element_chart.appendChild(state.easyPieChartLabel);
4690
4691                 var titlefontsize = Math.round(valuefontsize * 1.6 / 3);
4692                 var titletop = Math.round(valuetop - (titlefontsize * 2) - (size / 40));
4693                 state.easyPieChartTitle = document.createElement('span');
4694                 state.easyPieChartTitle.className = 'easyPieChartTitle';
4695                 state.easyPieChartTitle.innerHTML = state.title;
4696                 state.easyPieChartTitle.style.fontSize = titlefontsize + 'px';
4697                 state.easyPieChartTitle.style.lineHeight = titlefontsize + 'px';
4698                 state.easyPieChartTitle.style.top = titletop.toString() + 'px';
4699                 state.element_chart.appendChild(state.easyPieChartTitle);
4700
4701                 var unitfontsize = Math.round(titlefontsize * 0.9);
4702                 var unittop = Math.round(valuetop + (valuefontsize + unitfontsize) + (size / 40));
4703                 state.easyPieChartUnits = document.createElement('span');
4704                 state.easyPieChartUnits.className = 'easyPieChartUnits';
4705                 state.easyPieChartUnits.innerHTML = state.units;
4706                 state.easyPieChartUnits.style.fontSize = unitfontsize + 'px';
4707                 state.easyPieChartUnits.style.top = unittop.toString() + 'px';
4708                 state.element_chart.appendChild(state.easyPieChartUnits);
4709
4710                 chart.easyPieChart({
4711                         barColor: self.data('easypiechart-barcolor') || state.chartColors()[0], //'#ef1e25',
4712                         trackColor: self.data('easypiechart-trackcolor') || NETDATA.themes.current.easypiechart_track,
4713                         scaleColor: self.data('easypiechart-scalecolor') || NETDATA.themes.current.easypiechart_scale,
4714                         scaleLength: self.data('easypiechart-scalelength') || 5,
4715                         lineCap: self.data('easypiechart-linecap') || 'round',
4716                         lineWidth: self.data('easypiechart-linewidth') || stroke,
4717                         trackWidth: self.data('easypiechart-trackwidth') || undefined,
4718                         size: self.data('easypiechart-size') || size,
4719                         rotate: self.data('easypiechart-rotate') || 0,
4720                         animate: self.data('easypiechart-rotate') || {duration: 500, enabled: true},
4721                         easing: self.data('easypiechart-easing') || undefined
4722                 });
4723
4724                 // when we just re-create the chart
4725                 // do not animate the first update
4726                 var animate = true;
4727                 if(typeof state.easyPieChart_instance !== 'undefined')
4728                         animate = false;
4729
4730                 state.easyPieChart_instance = chart.data('easyPieChart');
4731                 if(animate === false) state.easyPieChart_instance.disableAnimation();
4732                 state.easyPieChart_instance.update(pcent);
4733                 if(animate === false) state.easyPieChart_instance.enableAnimation();
4734                 return true;
4735         };
4736
4737         // ----------------------------------------------------------------------------------------------------------------
4738         // gauge.js
4739
4740         NETDATA.gaugeInitialize = function(callback) {
4741                 if(typeof netdataNoGauge === 'undefined' || !netdataNoGauge) {
4742                         $.ajax({
4743                                 url: NETDATA.gauge_js,
4744                                 cache: true,
4745                                 dataType: "script"
4746                         })
4747                                 .done(function() {
4748                                         NETDATA.registerChartLibrary('gauge', NETDATA.gauge_js);
4749                                 })
4750                                 .fail(function() {
4751                                         NETDATA.chartLibraries.gauge.enabled = false;
4752                                         NETDATA.error(100, NETDATA.gauge_js);
4753                                 })
4754                                 .always(function() {
4755                                         if(typeof callback === "function")
4756                                                 callback();
4757                                 })
4758                 }
4759                 else {
4760                         NETDATA.chartLibraries.gauge.enabled = false;
4761                         if(typeof callback === "function")
4762                                 callback();
4763                 }
4764         };
4765
4766         NETDATA.gaugeAnimation = function(state, status) {
4767                 var speed = 32;
4768
4769                 if(typeof status === 'boolean' && status === false)
4770                         speed = 1000000000;
4771                 else if(typeof status === 'number')
4772                         speed = status;
4773
4774                 state.gauge_instance.animationSpeed = speed;
4775                 state.___gaugeOld__.speed = speed;
4776         }
4777
4778         NETDATA.gaugeSet = function(state, value, min, max) {
4779                 if(typeof value !== 'number') value = 0;
4780                 if(typeof min !== 'number') min = 0;
4781                 if(typeof max !== 'number') max = 0;
4782                 if(value > max) max = value;
4783                 if(value < min) min = value;
4784                 if(min > max) {
4785                         var t = min;
4786                         min = max;
4787                         max = t;
4788                 }
4789                 else if(min == max)
4790                         max = min + 1;
4791
4792                 // gauge.js has an issue if the needle
4793                 // is smaller than min or larger than max
4794                 // when we set the new values
4795                 // the needle will go crazy
4796
4797                 // to prevent it, we always feed it
4798                 // with a percentage, so that the needle
4799                 // is always between min and max
4800                 var pcent = (value - min) * 100 / (max - min);
4801
4802                 // these should never happen
4803                 if(pcent < 0) pcent = 0;
4804                 if(pcent > 100) pcent = 100;
4805
4806                 state.gauge_instance.set(pcent);
4807
4808                 state.___gaugeOld__.value = value;
4809                 state.___gaugeOld__.min = min;
4810                 state.___gaugeOld__.max = max;
4811         };
4812
4813         NETDATA.gaugeSetLabels = function(state, value, min, max) {
4814                 if(state.___gaugeOld__.valueLabel !== value) {
4815                         state.___gaugeOld__.valueLabel = value;
4816                         state.gaugeChartLabel.innerHTML = state.legendFormatValue(value);
4817                 }
4818                 if(state.___gaugeOld__.minLabel !== min) {
4819                         state.___gaugeOld__.minLabel = min;
4820                         state.gaugeChartMin.innerHTML = state.legendFormatValue(min);
4821                 }
4822                 if(state.___gaugeOld__.maxLabel !== max) {
4823                         state.___gaugeOld__.maxLabel = max;
4824                         state.gaugeChartMax.innerHTML = state.legendFormatValue(max);
4825                 }
4826         };
4827
4828         NETDATA.gaugeClearSelection = function(state) {
4829                 if(typeof state.gaugeEvent !== 'undefined') {
4830                         if(state.gaugeEvent.timer !== null)
4831                                 clearTimeout(state.gaugeEvent.timer);
4832
4833                         state.gaugeEvent.timer = null;
4834                 }
4835
4836                 if(state.isAutoRefreshed() === true && state.data !== null) {
4837                         NETDATA.gaugeChartUpdate(state, state.data);
4838                 }
4839                 else {
4840                         NETDATA.gaugeAnimation(state, false);
4841                         NETDATA.gaugeSet(state, null, null, null);
4842                         NETDATA.gaugeSetLabels(state, null, null, null);
4843                 }
4844
4845                 NETDATA.gaugeAnimation(state, true);
4846                 return true;
4847         };
4848
4849         NETDATA.gaugeSetSelection = function(state, t) {
4850                 if(state.timeIsVisible(t) !== true)
4851                         return NETDATA.gaugeClearSelection(state);
4852
4853                 var slot = state.calculateRowForTime(t);
4854                 if(slot < 0 || slot >= state.data.result.length)
4855                         return NETDATA.gaugeClearSelection(state);
4856
4857                 if(typeof state.gaugeEvent === 'undefined') {
4858                         state.gaugeEvent = {
4859                                 timer: null,
4860                                 value: 0,
4861                                 min: 0,
4862                                 max: 0
4863                         };
4864                 }
4865
4866                 var value = state.data.result[state.data.result.length - 1 - slot];
4867                 var max = (state.gaugeMax === null)?state.data.max:state.gaugeMax;
4868                 var min = 0;
4869
4870                 state.gaugeEvent.value = value;
4871                 state.gaugeEvent.max = max;
4872                 state.gaugeEvent.min = min;
4873                 NETDATA.gaugeSetLabels(state, value, min, max);
4874
4875                 if(state.gaugeEvent.timer === null) {
4876                         NETDATA.gaugeAnimation(state, false);
4877
4878                         state.gaugeEvent.timer = setTimeout(function() {
4879                                 state.gaugeEvent.timer = null;
4880                                 NETDATA.gaugeSet(state, state.gaugeEvent.value, state.gaugeEvent.min, state.gaugeEvent.max);
4881                         }, NETDATA.options.current.charts_selection_animation_delay);
4882                 }
4883
4884                 return true;
4885         };
4886
4887         NETDATA.gaugeChartUpdate = function(state, data) {
4888                 var value, min, max;
4889
4890                 if(NETDATA.globalPanAndZoom.isActive() === true || state.isAutoRefreshed() === false) {
4891                         value = 0;
4892                         min = 0;
4893                         max = 1;
4894                         NETDATA.gaugeSetLabels(state, null, null, null);
4895                 }
4896                 else {
4897                         value = data.result[0];
4898                         min = 0;
4899                         max = (state.gaugeMax === null)?data.max:state.gaugeMax;
4900                         if(value > max) max = value;
4901                         NETDATA.gaugeSetLabels(state, value, min, max);
4902                 }
4903
4904                 NETDATA.gaugeSet(state, value, min, max);
4905                 return true;
4906         };
4907
4908         NETDATA.gaugeChartCreate = function(state, data) {
4909                 var self = $(state.element);
4910                 var chart = $(state.element_chart);
4911
4912                 var value = data.result[0];
4913                 var max = self.data('gauge-max-value') || null;
4914                 var adjust = self.data('gauge-adjust') || null;
4915                 var pointerColor = self.data('gauge-pointer-color') || NETDATA.themes.current.gauge_pointer;
4916                 var strokeColor = self.data('gauge-stroke-color') || NETDATA.themes.current.gauge_stroke;
4917                 var startColor = self.data('gauge-start-color') || state.chartColors()[0];
4918                 var stopColor = self.data('gauge-stop-color') || void 0;
4919                 var generateGradient = self.data('gauge-generate-gradient') || false;
4920
4921                 if(max === null) {
4922                         max = data.max;
4923                         state.gaugeMax = null;
4924                 }
4925                 else
4926                         state.gaugeMax = max;
4927
4928                 var width = state.chartWidth(), height = state.chartHeight(); //, ratio = 1.5;
4929                 //switch(adjust) {
4930                 //      case 'width': width = height * ratio; break;
4931                 //      case 'height':
4932                 //      default: height = width / ratio; break;
4933                 //}
4934                 //state.element.style.width = width.toString() + 'px';
4935                 //state.element.style.height = height.toString() + 'px';
4936
4937                 var lum_d = 0.05;
4938
4939                 var options = {
4940                         lines: 12,                                      // The number of lines to draw
4941                         angle: 0.15,                            // The length of each line
4942                         lineWidth: 0.44,                        // 0.44 The line thickness
4943                         pointer: {
4944                                 length: 0.8,                    // 0.9 The radius of the inner circle
4945                                 strokeWidth: 0.035,             // The rotation offset
4946                                 color: pointerColor             // Fill color
4947                         },
4948                         colorStart: startColor,         // Colors
4949                         colorStop: stopColor,           // just experiment with them
4950                         strokeColor: strokeColor,       // to see which ones work best for you
4951                         limitMax: true,
4952                         generateGradient: generateGradient,
4953                         gradientType: 0
4954                 };
4955
4956                 if(generateGradient === false && NETDATA.themes.current.gauge_gradient === true) {
4957                         options.percentColors = [
4958                                 [0.0, NETDATA.colorLuminance(startColor, (lum_d * 10) - (lum_d * 0))],
4959                                 [0.1, NETDATA.colorLuminance(startColor, (lum_d * 10) - (lum_d * 1))],
4960                                 [0.2, NETDATA.colorLuminance(startColor, (lum_d * 10) - (lum_d * 2))],
4961                                 [0.3, NETDATA.colorLuminance(startColor, (lum_d * 10) - (lum_d * 3))],
4962                                 [0.4, NETDATA.colorLuminance(startColor, (lum_d * 10) - (lum_d * 4))],
4963                                 [0.5, NETDATA.colorLuminance(startColor, (lum_d * 10) - (lum_d * 5))],
4964                                 [0.6, NETDATA.colorLuminance(startColor, (lum_d * 10) - (lum_d * 6))],
4965                                 [0.7, NETDATA.colorLuminance(startColor, (lum_d * 10) - (lum_d * 7))],
4966                                 [0.8, NETDATA.colorLuminance(startColor, (lum_d * 10) - (lum_d * 8))],
4967                                 [0.9, NETDATA.colorLuminance(startColor, (lum_d * 10) - (lum_d * 9))],
4968                                 [1.0, NETDATA.colorLuminance(startColor, 0.0)]];
4969                 }
4970
4971                 state.gauge_canvas = document.createElement('canvas');
4972                 state.gauge_canvas.id = 'gauge-' + state.uuid + '-canvas';
4973                 state.gauge_canvas.className = 'gaugeChart';
4974                 state.gauge_canvas.width  = width;
4975                 state.gauge_canvas.height = height;
4976                 state.element_chart.appendChild(state.gauge_canvas);
4977
4978                 var valuefontsize = Math.floor(height / 6);
4979                 var valuetop = Math.round((height - valuefontsize - (height / 6)) / 2);
4980                 state.gaugeChartLabel = document.createElement('span');
4981                 state.gaugeChartLabel.className = 'gaugeChartLabel';
4982                 state.gaugeChartLabel.style.fontSize = valuefontsize + 'px';
4983                 state.gaugeChartLabel.style.top = valuetop.toString() + 'px';
4984                 state.element_chart.appendChild(state.gaugeChartLabel);
4985
4986                 var titlefontsize = Math.round(valuefontsize / 2);
4987                 var titletop = 0;
4988                 state.gaugeChartTitle = document.createElement('span');
4989                 state.gaugeChartTitle.className = 'gaugeChartTitle';
4990                 state.gaugeChartTitle.innerHTML = state.title;
4991                 state.gaugeChartTitle.style.fontSize = titlefontsize + 'px';
4992                 state.gaugeChartTitle.style.lineHeight = titlefontsize + 'px';
4993                 state.gaugeChartTitle.style.top = titletop.toString() + 'px';
4994                 state.element_chart.appendChild(state.gaugeChartTitle);
4995
4996                 var unitfontsize = Math.round(titlefontsize * 0.9);
4997                 state.gaugeChartUnits = document.createElement('span');
4998                 state.gaugeChartUnits.className = 'gaugeChartUnits';
4999                 state.gaugeChartUnits.innerHTML = state.units;
5000                 state.gaugeChartUnits.style.fontSize = unitfontsize + 'px';
5001                 state.element_chart.appendChild(state.gaugeChartUnits);
5002
5003                 state.gaugeChartMin = document.createElement('span');
5004                 state.gaugeChartMin.className = 'gaugeChartMin';
5005                 state.gaugeChartMin.style.fontSize = Math.round(valuefontsize * 0.75).toString() + 'px';
5006                 state.element_chart.appendChild(state.gaugeChartMin);
5007
5008                 state.gaugeChartMax = document.createElement('span');
5009                 state.gaugeChartMax.className = 'gaugeChartMax';
5010                 state.gaugeChartMax.style.fontSize = Math.round(valuefontsize * 0.75).toString() + 'px';
5011                 state.element_chart.appendChild(state.gaugeChartMax);
5012
5013                 // when we just re-create the chart
5014                 // do not animate the first update
5015                 var animate = true;
5016                 if(typeof state.gauge_instance !== 'undefined')
5017                         animate = false;
5018
5019                 state.gauge_instance = new Gauge(state.gauge_canvas).setOptions(options); // create sexy gauge!
5020
5021                 state.___gaugeOld__ = {
5022                         value: value,
5023                         min: 0,
5024                         max: max,
5025                         valueLabel: null,
5026                         minLabel: null,
5027                         maxLabel: null
5028                 };
5029
5030                 // we will always feed a percentage
5031                 state.gauge_instance.minValue = 0;
5032                 state.gauge_instance.maxValue = 100;
5033
5034                 NETDATA.gaugeAnimation(state, animate);
5035                 NETDATA.gaugeSet(state, value, 0, max);
5036                 NETDATA.gaugeSetLabels(state, value, 0, max);
5037                 NETDATA.gaugeAnimation(state, true);
5038                 return true;
5039         };
5040
5041         // ----------------------------------------------------------------------------------------------------------------
5042         // Charts Libraries Registration
5043
5044         NETDATA.chartLibraries = {
5045                 "dygraph": {
5046                         initialize: NETDATA.dygraphInitialize,
5047                         create: NETDATA.dygraphChartCreate,
5048                         update: NETDATA.dygraphChartUpdate,
5049                         resize: function(state) {
5050                                 if(typeof state.dygraph_instance.resize === 'function')
5051                                         state.dygraph_instance.resize();
5052                         },
5053                         setSelection: NETDATA.dygraphSetSelection,
5054                         clearSelection:  NETDATA.dygraphClearSelection,
5055                         toolboxPanAndZoom: NETDATA.dygraphToolboxPanAndZoom,
5056                         initialized: false,
5057                         enabled: true,
5058                         format: function(state) { return 'json'; },
5059                         options: function(state) { return 'ms|flip'; },
5060                         legend: function(state) {
5061                                 if(this.isSparkline(state) === false)
5062                                         return 'right-side';
5063                                 else
5064                                         return null;
5065                         },
5066                         autoresize: function(state) { return true; },
5067                         max_updates_to_recreate: function(state) { return 5000; },
5068                         track_colors: function(state) { return true; },
5069                         pixels_per_point: function(state) {
5070                                 if(this.isSparkline(state) === false)
5071                                         return 3;
5072                                 else
5073                                         return 2;
5074                         },
5075
5076                         isSparkline: function(state) {
5077                                 if(typeof state.dygraph_sparkline === 'undefined') {
5078                                         var t = $(state.element).data('dygraph-theme');
5079                                         if(t === 'sparkline')
5080                                                 state.dygraph_sparkline = true;
5081                                         else
5082                                                 state.dygraph_sparkline = false;
5083                                 }
5084                                 return state.dygraph_sparkline;
5085                         }
5086                 },
5087                 "sparkline": {
5088                         initialize: NETDATA.sparklineInitialize,
5089                         create: NETDATA.sparklineChartCreate,
5090                         update: NETDATA.sparklineChartUpdate,
5091                         resize: null,
5092                         setSelection: undefined, // function(state, t) { return true; },
5093                         clearSelection: undefined, // function(state) { return true; },
5094                         toolboxPanAndZoom: null,
5095                         initialized: false,
5096                         enabled: true,
5097                         format: function(state) { return 'array'; },
5098                         options: function(state) { return 'flip|abs'; },
5099                         legend: function(state) { return null; },
5100                         autoresize: function(state) { return false; },
5101                         max_updates_to_recreate: function(state) { return 5000; },
5102                         track_colors: function(state) { return false; },
5103                         pixels_per_point: function(state) { return 3; }
5104                 },
5105                 "peity": {
5106                         initialize: NETDATA.peityInitialize,
5107                         create: NETDATA.peityChartCreate,
5108                         update: NETDATA.peityChartUpdate,
5109                         resize: null,
5110                         setSelection: undefined, // function(state, t) { return true; },
5111                         clearSelection: undefined, // function(state) { return true; },
5112                         toolboxPanAndZoom: null,
5113                         initialized: false,
5114                         enabled: true,
5115                         format: function(state) { return 'ssvcomma'; },
5116                         options: function(state) { return 'null2zero|flip|abs'; },
5117                         legend: function(state) { return null; },
5118                         autoresize: function(state) { return false; },
5119                         max_updates_to_recreate: function(state) { return 5000; },
5120                         track_colors: function(state) { return false; },
5121                         pixels_per_point: function(state) { return 3; }
5122                 },
5123                 "morris": {
5124                         initialize: NETDATA.morrisInitialize,
5125                         create: NETDATA.morrisChartCreate,
5126                         update: NETDATA.morrisChartUpdate,
5127                         resize: null,
5128                         setSelection: undefined, // function(state, t) { return true; },
5129                         clearSelection: undefined, // function(state) { return true; },
5130                         toolboxPanAndZoom: null,
5131                         initialized: false,
5132                         enabled: true,
5133                         format: function(state) { return 'json'; },
5134                         options: function(state) { return 'objectrows|ms'; },
5135                         legend: function(state) { return null; },
5136                         autoresize: function(state) { return false; },
5137                         max_updates_to_recreate: function(state) { return 50; },
5138                         track_colors: function(state) { return false; },
5139                         pixels_per_point: function(state) { return 15; }
5140                 },
5141                 "google": {
5142                         initialize: NETDATA.googleInitialize,
5143                         create: NETDATA.googleChartCreate,
5144                         update: NETDATA.googleChartUpdate,
5145                         resize: null,
5146                         setSelection: undefined, //function(state, t) { return true; },
5147                         clearSelection: undefined, //function(state) { return true; },
5148                         toolboxPanAndZoom: null,
5149                         initialized: false,
5150                         enabled: true,
5151                         format: function(state) { return 'datatable'; },
5152                         options: function(state) { return ''; },
5153                         legend: function(state) { return null; },
5154                         autoresize: function(state) { return false; },
5155                         max_updates_to_recreate: function(state) { return 300; },
5156                         track_colors: function(state) { return false; },
5157                         pixels_per_point: function(state) { return 4; }
5158                 },
5159                 "raphael": {
5160                         initialize: NETDATA.raphaelInitialize,
5161                         create: NETDATA.raphaelChartCreate,
5162                         update: NETDATA.raphaelChartUpdate,
5163                         resize: null,
5164                         setSelection: undefined, // function(state, t) { return true; },
5165                         clearSelection: undefined, // function(state) { return true; },
5166                         toolboxPanAndZoom: null,
5167                         initialized: false,
5168                         enabled: true,
5169                         format: function(state) { return 'json'; },
5170                         options: function(state) { return ''; },
5171                         legend: function(state) { return null; },
5172                         autoresize: function(state) { return false; },
5173                         max_updates_to_recreate: function(state) { return 5000; },
5174                         track_colors: function(state) { return false; },
5175                         pixels_per_point: function(state) { return 3; }
5176                 },
5177                 "c3": {
5178                         initialize: NETDATA.c3Initialize,
5179                         create: NETDATA.c3ChartCreate,
5180                         update: NETDATA.c3ChartUpdate,
5181                         resize: null,
5182                         setSelection: undefined, // function(state, t) { return true; },
5183                         clearSelection: undefined, // function(state) { return true; },
5184                         toolboxPanAndZoom: null,
5185                         initialized: false,
5186                         enabled: true,
5187                         format: function(state) { return 'csvjsonarray'; },
5188                         options: function(state) { return 'milliseconds'; },
5189                         legend: function(state) { return null; },
5190                         autoresize: function(state) { return false; },
5191                         max_updates_to_recreate: function(state) { return 5000; },
5192                         track_colors: function(state) { return false; },
5193                         pixels_per_point: function(state) { return 15; }
5194                 },
5195                 "d3": {
5196                         initialize: NETDATA.d3Initialize,
5197                         create: NETDATA.d3ChartCreate,
5198                         update: NETDATA.d3ChartUpdate,
5199                         resize: null,
5200                         setSelection: undefined, // function(state, t) { return true; },
5201                         clearSelection: undefined, // function(state) { return true; },
5202                         toolboxPanAndZoom: null,
5203                         initialized: false,
5204                         enabled: true,
5205                         format: function(state) { return 'json'; },
5206                         options: function(state) { return ''; },
5207                         legend: function(state) { return null; },
5208                         autoresize: function(state) { return false; },
5209                         max_updates_to_recreate: function(state) { return 5000; },
5210                         track_colors: function(state) { return false; },
5211                         pixels_per_point: function(state) { return 3; }
5212                 },
5213                 "easypiechart": {
5214                         initialize: NETDATA.easypiechartInitialize,
5215                         create: NETDATA.easypiechartChartCreate,
5216                         update: NETDATA.easypiechartChartUpdate,
5217                         resize: null,
5218                         setSelection: NETDATA.easypiechartSetSelection,
5219                         clearSelection: NETDATA.easypiechartClearSelection,
5220                         toolboxPanAndZoom: null,
5221                         initialized: false,
5222                         enabled: true,
5223                         format: function(state) { return 'array'; },
5224                         options: function(state) { return 'absolute'; },
5225                         legend: function(state) { return null; },
5226                         autoresize: function(state) { return false; },
5227                         max_updates_to_recreate: function(state) { return 5000; },
5228                         track_colors: function(state) { return true; },
5229                         pixels_per_point: function(state) { return 3; },
5230                         aspect_ratio: 100
5231                 },
5232                 "gauge": {
5233                         initialize: NETDATA.gaugeInitialize,
5234                         create: NETDATA.gaugeChartCreate,
5235                         update: NETDATA.gaugeChartUpdate,
5236                         resize: null,
5237                         setSelection: NETDATA.gaugeSetSelection,
5238                         clearSelection: NETDATA.gaugeClearSelection,
5239                         toolboxPanAndZoom: null,
5240                         initialized: false,
5241                         enabled: true,
5242                         format: function(state) { return 'array'; },
5243                         options: function(state) { return 'absolute'; },
5244                         legend: function(state) { return null; },
5245                         autoresize: function(state) { return false; },
5246                         max_updates_to_recreate: function(state) { return 5000; },
5247                         track_colors: function(state) { return true; },
5248                         pixels_per_point: function(state) { return 3; },
5249                         aspect_ratio: 70
5250                 }
5251         };
5252
5253         NETDATA.registerChartLibrary = function(library, url) {
5254                 if(NETDATA.options.debug.libraries === true)
5255                         console.log("registering chart library: " + library);
5256
5257                 NETDATA.chartLibraries[library].url = url;
5258                 NETDATA.chartLibraries[library].initialized = true;
5259                 NETDATA.chartLibraries[library].enabled = true;
5260         }
5261
5262         // ----------------------------------------------------------------------------------------------------------------
5263         // Start up
5264
5265         NETDATA.requiredJs = [
5266                 {
5267                         url: NETDATA.serverDefault + 'lib/bootstrap.min.js',
5268                         isAlreadyLoaded: function() {
5269                                 if(typeof $().emulateTransitionEnd == 'function')
5270                                         return true;
5271                                 else {
5272                                         if(typeof netdataNoBootstrap !== 'undefined' && netdataNoBootstrap)
5273                                                 return true;
5274                                         else
5275                                                 return false;
5276                                 }
5277                         }
5278                 },
5279                 {
5280                         url: NETDATA.serverDefault + 'lib/jquery.nanoscroller.min.js',
5281                         isAlreadyLoaded: function() { return false; }
5282                 },
5283                 {
5284                         url: NETDATA.serverDefault + 'lib/bootstrap-toggle.min.js',
5285                         isAlreadyLoaded: function() { return false; }
5286                 }
5287         ];
5288
5289         NETDATA.requiredCSS = [
5290                 {
5291                         url: NETDATA.themes.current.bootstrap_css,
5292                         isAlreadyLoaded: function() {
5293                                 if(typeof netdataNoBootstrap !== 'undefined' && netdataNoBootstrap)
5294                                         return true;
5295                                 else
5296                                         return false;
5297                         }
5298                 },
5299                 {
5300                         url: NETDATA.serverDefault + 'css/font-awesome.min.css',
5301                         isAlreadyLoaded: function() { return false; }
5302                 },
5303                 {
5304                         url: NETDATA.themes.current.dashboard_css,
5305                         isAlreadyLoaded: function() { return false; }
5306                 },
5307                 {
5308                         url: NETDATA.serverDefault + 'css/bootstrap-toggle.min.css',
5309                         isAlreadyLoaded: function() { return false; }
5310                 }
5311         ];
5312
5313         NETDATA.loadRequiredJs = function(index, callback) {
5314                 if(index >= NETDATA.requiredJs.length)  {
5315                         if(typeof callback === 'function')
5316                                 callback();
5317                         return;
5318                 }
5319
5320                 if(NETDATA.requiredJs[index].isAlreadyLoaded()) {
5321                         NETDATA.loadRequiredJs(++index, callback);
5322                         return;
5323                 }
5324
5325                 if(NETDATA.options.debug.main_loop === true)
5326                         console.log('loading ' + NETDATA.requiredJs[index].url);
5327
5328                 $.ajax({
5329                         url: NETDATA.requiredJs[index].url,
5330                         cache: true,
5331                         dataType: "script"
5332                 })
5333                 .success(function() {
5334                         if(NETDATA.options.debug.main_loop === true)
5335                                 console.log('loaded ' + NETDATA.requiredJs[index].url);
5336
5337                         NETDATA.loadRequiredJs(++index, callback);
5338                 })
5339                 .fail(function() {
5340                         alert('Cannot load required JS library: ' + NETDATA.requiredJs[index].url);
5341                 })
5342         }
5343
5344         NETDATA.loadRequiredCSS = function(index) {
5345                 if(index >= NETDATA.requiredCSS.length)
5346                         return;
5347
5348                 if(NETDATA.requiredCSS[index].isAlreadyLoaded()) {
5349                         NETDATA.loadRequiredCSS(++index);
5350                         return;
5351                 }
5352
5353                 if(NETDATA.options.debug.main_loop === true)
5354                         console.log('loading ' + NETDATA.requiredCSS[index].url);
5355
5356                 NETDATA._loadCSS(NETDATA.requiredCSS[index].url);
5357                 NETDATA.loadRequiredCSS(++index);
5358         }
5359
5360         NETDATA.errorReset();
5361         NETDATA.loadRequiredCSS(0);
5362
5363         NETDATA._loadjQuery(function() {
5364                 NETDATA.loadRequiredJs(0, function() {
5365                         if(typeof netdataDontStart === 'undefined' || !netdataDontStart) {
5366                                 if(NETDATA.options.debug.main_loop === true)
5367                                         console.log('starting chart refresh thread');
5368
5369                                 NETDATA.start();
5370                         }
5371                 });
5372         });
5373
5374         // window.NETDATA = NETDATA;
5375 // })(window, document);