| 1 | // Copyright 2006 Dan Vanderkam (danvdk@gmail.com) |
| 2 | // All Rights Reserved. |
| 3 | |
| 4 | /** |
| 5 | * @fileoverview Creates an interactive, zoomable graph based on a CSV file or |
| 6 | * string. Dygraph can handle multiple series with or without error bars. The |
| 7 | * date/value ranges will be automatically set. Dygraph uses the |
| 8 | * <canvas> tag, so it only works in FF1.5+. |
| 9 | * @author danvdk@gmail.com (Dan Vanderkam) |
| 10 | |
| 11 | Usage: |
| 12 | <div id="graphdiv" style="width:800px; height:500px;"></div> |
| 13 | <script type="text/javascript"> |
| 14 | new Dygraph(document.getElementById("graphdiv"), |
| 15 | "datafile.csv", // CSV file with headers |
| 16 | { }); // options |
| 17 | </script> |
| 18 | |
| 19 | The CSV file is of the form |
| 20 | |
| 21 | Date,SeriesA,SeriesB,SeriesC |
| 22 | YYYYMMDD,A1,B1,C1 |
| 23 | YYYYMMDD,A2,B2,C2 |
| 24 | |
| 25 | If the 'errorBars' option is set in the constructor, the input should be of |
| 26 | the form |
| 27 | |
| 28 | Date,SeriesA,SeriesB,... |
| 29 | YYYYMMDD,A1,sigmaA1,B1,sigmaB1,... |
| 30 | YYYYMMDD,A2,sigmaA2,B2,sigmaB2,... |
| 31 | |
| 32 | If the 'fractions' option is set, the input should be of the form: |
| 33 | |
| 34 | Date,SeriesA,SeriesB,... |
| 35 | YYYYMMDD,A1/B1,A2/B2,... |
| 36 | YYYYMMDD,A1/B1,A2/B2,... |
| 37 | |
| 38 | And error bars will be calculated automatically using a binomial distribution. |
| 39 | |
| 40 | For further documentation and examples, see http://dygraphs.com/ |
| 41 | |
| 42 | */ |
| 43 | |
| 44 | /** |
| 45 | * An interactive, zoomable graph |
| 46 | * @param {String | Function} file A file containing CSV data or a function that |
| 47 | * returns this data. The expected format for each line is |
| 48 | * YYYYMMDD,val1,val2,... or, if attrs.errorBars is set, |
| 49 | * YYYYMMDD,val1,stddev1,val2,stddev2,... |
| 50 | * @param {Object} attrs Various other attributes, e.g. errorBars determines |
| 51 | * whether the input data contains error ranges. |
| 52 | */ |
| 53 | Dygraph = function(div, data, opts) { |
| 54 | if (arguments.length > 0) { |
| 55 | if (arguments.length == 4) { |
| 56 | // Old versions of dygraphs took in the series labels as a constructor |
| 57 | // parameter. This doesn't make sense anymore, but it's easy to continue |
| 58 | // to support this usage. |
| 59 | this.warn("Using deprecated four-argument dygraph constructor"); |
| 60 | this.__old_init__(div, data, arguments[2], arguments[3]); |
| 61 | } else { |
| 62 | this.__init__(div, data, opts); |
| 63 | } |
| 64 | } |
| 65 | }; |
| 66 | |
| 67 | Dygraph.NAME = "Dygraph"; |
| 68 | Dygraph.VERSION = "1.2"; |
| 69 | Dygraph.__repr__ = function() { |
| 70 | return "[" + this.NAME + " " + this.VERSION + "]"; |
| 71 | }; |
| 72 | Dygraph.toString = function() { |
| 73 | return this.__repr__(); |
| 74 | }; |
| 75 | |
| 76 | // Various default values |
| 77 | Dygraph.DEFAULT_ROLL_PERIOD = 1; |
| 78 | Dygraph.DEFAULT_WIDTH = 480; |
| 79 | Dygraph.DEFAULT_HEIGHT = 320; |
| 80 | Dygraph.AXIS_LINE_WIDTH = 0.3; |
| 81 | |
| 82 | // Default attribute values. |
| 83 | Dygraph.DEFAULT_ATTRS = { |
| 84 | highlightCircleSize: 3, |
| 85 | pixelsPerXLabel: 60, |
| 86 | pixelsPerYLabel: 30, |
| 87 | |
| 88 | labelsDivWidth: 250, |
| 89 | labelsDivStyles: { |
| 90 | // TODO(danvk): move defaults from createStatusMessage_ here. |
| 91 | }, |
| 92 | labelsSeparateLines: false, |
| 93 | labelsShowZeroValues: true, |
| 94 | labelsKMB: false, |
| 95 | labelsKMG2: false, |
| 96 | showLabelsOnHighlight: true, |
| 97 | |
| 98 | yValueFormatter: function(x) { return Dygraph.round_(x, 2); }, |
| 99 | |
| 100 | strokeWidth: 1.0, |
| 101 | |
| 102 | axisTickSize: 3, |
| 103 | axisLabelFontSize: 14, |
| 104 | xAxisLabelWidth: 50, |
| 105 | yAxisLabelWidth: 50, |
| 106 | xAxisLabelFormatter: Dygraph.dateAxisFormatter, |
| 107 | rightGap: 5, |
| 108 | |
| 109 | showRoller: false, |
| 110 | xValueFormatter: Dygraph.dateString_, |
| 111 | xValueParser: Dygraph.dateParser, |
| 112 | xTicker: Dygraph.dateTicker, |
| 113 | |
| 114 | delimiter: ',', |
| 115 | |
| 116 | logScale: false, |
| 117 | sigma: 2.0, |
| 118 | errorBars: false, |
| 119 | fractions: false, |
| 120 | wilsonInterval: true, // only relevant if fractions is true |
| 121 | customBars: false, |
| 122 | fillGraph: false, |
| 123 | fillAlpha: 0.15, |
| 124 | connectSeparatedPoints: false, |
| 125 | |
| 126 | stackedGraph: false, |
| 127 | hideOverlayOnMouseOut: true, |
| 128 | |
| 129 | stepPlot: false, |
| 130 | avoidMinZero: false, |
| 131 | }; |
| 132 | |
| 133 | // Various logging levels. |
| 134 | Dygraph.DEBUG = 1; |
| 135 | Dygraph.INFO = 2; |
| 136 | Dygraph.WARNING = 3; |
| 137 | Dygraph.ERROR = 3; |
| 138 | |
| 139 | // Directions for panning and zooming. Use bit operations when combined |
| 140 | // values are possible. |
| 141 | Dygraph.HORIZONTAL = 1; |
| 142 | Dygraph.VERTICAL = 2; |
| 143 | |
| 144 | // Used for initializing annotation CSS rules only once. |
| 145 | Dygraph.addedAnnotationCSS = false; |
| 146 | |
| 147 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { |
| 148 | // Labels is no longer a constructor parameter, since it's typically set |
| 149 | // directly from the data source. It also conains a name for the x-axis, |
| 150 | // which the previous constructor form did not. |
| 151 | if (labels != null) { |
| 152 | var new_labels = ["Date"]; |
| 153 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); |
| 154 | Dygraph.update(attrs, { 'labels': new_labels }); |
| 155 | } |
| 156 | this.__init__(div, file, attrs); |
| 157 | }; |
| 158 | |
| 159 | /** |
| 160 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
| 161 | * and context <canvas> inside of it. See the constructor for details |
| 162 | * on the parameters. |
| 163 | * @param {Element} div the Element to render the graph into. |
| 164 | * @param {String | Function} file Source data |
| 165 | * @param {Object} attrs Miscellaneous other options |
| 166 | * @private |
| 167 | */ |
| 168 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
| 169 | // Hack for IE: if we're using excanvas and the document hasn't finished |
| 170 | // loading yet (and hence may not have initialized whatever it needs to |
| 171 | // initialize), then keep calling this routine periodically until it has. |
| 172 | if (/MSIE/.test(navigator.userAgent) && !window.opera && |
| 173 | typeof(G_vmlCanvasManager) != 'undefined' && |
| 174 | document.readyState != 'complete') { |
| 175 | var self = this; |
| 176 | setTimeout(function() { self.__init__(div, file, attrs) }, 100); |
| 177 | } |
| 178 | |
| 179 | // Support two-argument constructor |
| 180 | if (attrs == null) { attrs = {}; } |
| 181 | |
| 182 | // Copy the important bits into the object |
| 183 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
| 184 | this.maindiv_ = div; |
| 185 | this.file_ = file; |
| 186 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
| 187 | this.previousVerticalX_ = -1; |
| 188 | this.fractions_ = attrs.fractions || false; |
| 189 | this.dateWindow_ = attrs.dateWindow || null; |
| 190 | |
| 191 | this.wilsonInterval_ = attrs.wilsonInterval || true; |
| 192 | this.is_initial_draw_ = true; |
| 193 | this.annotations_ = []; |
| 194 | |
| 195 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
| 196 | // div, then only one will be drawn. |
| 197 | div.innerHTML = ""; |
| 198 | |
| 199 | // If the div isn't already sized then inherit from our attrs or |
| 200 | // give it a default size. |
| 201 | if (div.style.width == '') { |
| 202 | div.style.width = (attrs.width || Dygraph.DEFAULT_WIDTH) + "px"; |
| 203 | } |
| 204 | if (div.style.height == '') { |
| 205 | div.style.height = (attrs.height || Dygraph.DEFAULT_HEIGHT) + "px"; |
| 206 | } |
| 207 | this.width_ = parseInt(div.style.width, 10); |
| 208 | this.height_ = parseInt(div.style.height, 10); |
| 209 | // The div might have been specified as percent of the current window size, |
| 210 | // convert that to an appropriate number of pixels. |
| 211 | if (div.style.width.indexOf("%") == div.style.width.length - 1) { |
| 212 | this.width_ = div.offsetWidth; |
| 213 | } |
| 214 | if (div.style.height.indexOf("%") == div.style.height.length - 1) { |
| 215 | this.height_ = div.offsetHeight; |
| 216 | } |
| 217 | |
| 218 | if (this.width_ == 0) { |
| 219 | this.error("dygraph has zero width. Please specify a width in pixels."); |
| 220 | } |
| 221 | if (this.height_ == 0) { |
| 222 | this.error("dygraph has zero height. Please specify a height in pixels."); |
| 223 | } |
| 224 | |
| 225 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
| 226 | if (attrs['stackedGraph']) { |
| 227 | attrs['fillGraph'] = true; |
| 228 | // TODO(nikhilk): Add any other stackedGraph checks here. |
| 229 | } |
| 230 | |
| 231 | // Dygraphs has many options, some of which interact with one another. |
| 232 | // To keep track of everything, we maintain two sets of options: |
| 233 | // |
| 234 | // this.user_attrs_ only options explicitly set by the user. |
| 235 | // this.attrs_ defaults, options derived from user_attrs_, data. |
| 236 | // |
| 237 | // Options are then accessed this.attr_('attr'), which first looks at |
| 238 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent |
| 239 | // defaults without overriding behavior that the user specifically asks for. |
| 240 | this.user_attrs_ = {}; |
| 241 | Dygraph.update(this.user_attrs_, attrs); |
| 242 | |
| 243 | this.attrs_ = {}; |
| 244 | Dygraph.update(this.attrs_, Dygraph.DEFAULT_ATTRS); |
| 245 | |
| 246 | this.boundaryIds_ = []; |
| 247 | |
| 248 | // Make a note of whether labels will be pulled from the CSV file. |
| 249 | this.labelsFromCSV_ = (this.attr_("labels") == null); |
| 250 | |
| 251 | // Create the containing DIV and other interactive elements |
| 252 | this.createInterface_(); |
| 253 | |
| 254 | this.start_(); |
| 255 | }; |
| 256 | |
| 257 | Dygraph.prototype.attr_ = function(name, seriesName) { |
| 258 | if (seriesName && |
| 259 | typeof(this.user_attrs_[seriesName]) != 'undefined' && |
| 260 | this.user_attrs_[seriesName] != null && |
| 261 | typeof(this.user_attrs_[seriesName][name]) != 'undefined') { |
| 262 | return this.user_attrs_[seriesName][name]; |
| 263 | } else if (typeof(this.user_attrs_[name]) != 'undefined') { |
| 264 | return this.user_attrs_[name]; |
| 265 | } else if (typeof(this.attrs_[name]) != 'undefined') { |
| 266 | return this.attrs_[name]; |
| 267 | } else { |
| 268 | return null; |
| 269 | } |
| 270 | }; |
| 271 | |
| 272 | // TODO(danvk): any way I can get the line numbers to be this.warn call? |
| 273 | Dygraph.prototype.log = function(severity, message) { |
| 274 | if (typeof(console) != 'undefined') { |
| 275 | switch (severity) { |
| 276 | case Dygraph.DEBUG: |
| 277 | console.debug('dygraphs: ' + message); |
| 278 | break; |
| 279 | case Dygraph.INFO: |
| 280 | console.info('dygraphs: ' + message); |
| 281 | break; |
| 282 | case Dygraph.WARNING: |
| 283 | console.warn('dygraphs: ' + message); |
| 284 | break; |
| 285 | case Dygraph.ERROR: |
| 286 | console.error('dygraphs: ' + message); |
| 287 | break; |
| 288 | } |
| 289 | } |
| 290 | } |
| 291 | Dygraph.prototype.info = function(message) { |
| 292 | this.log(Dygraph.INFO, message); |
| 293 | } |
| 294 | Dygraph.prototype.warn = function(message) { |
| 295 | this.log(Dygraph.WARNING, message); |
| 296 | } |
| 297 | Dygraph.prototype.error = function(message) { |
| 298 | this.log(Dygraph.ERROR, message); |
| 299 | } |
| 300 | |
| 301 | /** |
| 302 | * Returns the current rolling period, as set by the user or an option. |
| 303 | * @return {Number} The number of days in the rolling window |
| 304 | */ |
| 305 | Dygraph.prototype.rollPeriod = function() { |
| 306 | return this.rollPeriod_; |
| 307 | }; |
| 308 | |
| 309 | /** |
| 310 | * Returns the currently-visible x-range. This can be affected by zooming, |
| 311 | * panning or a call to updateOptions. |
| 312 | * Returns a two-element array: [left, right]. |
| 313 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. |
| 314 | */ |
| 315 | Dygraph.prototype.xAxisRange = function() { |
| 316 | if (this.dateWindow_) return this.dateWindow_; |
| 317 | |
| 318 | // The entire chart is visible. |
| 319 | var left = this.rawData_[0][0]; |
| 320 | var right = this.rawData_[this.rawData_.length - 1][0]; |
| 321 | return [left, right]; |
| 322 | }; |
| 323 | |
| 324 | /** |
| 325 | * Returns the currently-visible y-range for an axis. This can be affected by |
| 326 | * zooming, panning or a call to updateOptions. Axis indices are zero-based. If |
| 327 | * called with no arguments, returns the range of the first axis. |
| 328 | * Returns a two-element array: [bottom, top]. |
| 329 | */ |
| 330 | Dygraph.prototype.yAxisRange = function(idx) { |
| 331 | if (typeof(idx) == "undefined") idx = 0; |
| 332 | if (idx < 0 || idx >= this.axes_.length) return null; |
| 333 | return [ this.axes_[idx].computedValueRange[0], |
| 334 | this.axes_[idx].computedValueRange[1] ]; |
| 335 | }; |
| 336 | |
| 337 | /** |
| 338 | * Returns the currently-visible y-ranges for each axis. This can be affected by |
| 339 | * zooming, panning, calls to updateOptions, etc. |
| 340 | * Returns an array of [bottom, top] pairs, one for each y-axis. |
| 341 | */ |
| 342 | Dygraph.prototype.yAxisRanges = function() { |
| 343 | var ret = []; |
| 344 | for (var i = 0; i < this.axes_.length; i++) { |
| 345 | ret.push(this.yAxisRange(i)); |
| 346 | } |
| 347 | return ret; |
| 348 | }; |
| 349 | |
| 350 | // TODO(danvk): use these functions throughout dygraphs. |
| 351 | /** |
| 352 | * Convert from data coordinates to canvas/div X/Y coordinates. |
| 353 | * If specified, do this conversion for the coordinate system of a particular |
| 354 | * axis. Uses the first axis by default. |
| 355 | * Returns a two-element array: [X, Y] |
| 356 | */ |
| 357 | Dygraph.prototype.toDomCoords = function(x, y, axis) { |
| 358 | var ret = [null, null]; |
| 359 | var area = this.plotter_.area; |
| 360 | if (x !== null) { |
| 361 | var xRange = this.xAxisRange(); |
| 362 | ret[0] = area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; |
| 363 | } |
| 364 | |
| 365 | if (y !== null) { |
| 366 | var yRange = this.yAxisRange(axis); |
| 367 | ret[1] = area.y + (yRange[1] - y) / (yRange[1] - yRange[0]) * area.h; |
| 368 | } |
| 369 | |
| 370 | return ret; |
| 371 | }; |
| 372 | |
| 373 | /** |
| 374 | * Convert from canvas/div coords to data coordinates. |
| 375 | * If specified, do this conversion for the coordinate system of a particular |
| 376 | * axis. Uses the first axis by default. |
| 377 | * Returns a two-element array: [X, Y] |
| 378 | */ |
| 379 | Dygraph.prototype.toDataCoords = function(x, y, axis) { |
| 380 | var ret = [null, null]; |
| 381 | var area = this.plotter_.area; |
| 382 | if (x !== null) { |
| 383 | var xRange = this.xAxisRange(); |
| 384 | ret[0] = xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); |
| 385 | } |
| 386 | |
| 387 | if (y !== null) { |
| 388 | var yRange = this.yAxisRange(axis); |
| 389 | ret[1] = yRange[0] + (area.h - y) / area.h * (yRange[1] - yRange[0]); |
| 390 | } |
| 391 | |
| 392 | return ret; |
| 393 | }; |
| 394 | |
| 395 | /** |
| 396 | * Returns the number of columns (including the independent variable). |
| 397 | */ |
| 398 | Dygraph.prototype.numColumns = function() { |
| 399 | return this.rawData_[0].length; |
| 400 | }; |
| 401 | |
| 402 | /** |
| 403 | * Returns the number of rows (excluding any header/label row). |
| 404 | */ |
| 405 | Dygraph.prototype.numRows = function() { |
| 406 | return this.rawData_.length; |
| 407 | }; |
| 408 | |
| 409 | /** |
| 410 | * Returns the value in the given row and column. If the row and column exceed |
| 411 | * the bounds on the data, returns null. Also returns null if the value is |
| 412 | * missing. |
| 413 | */ |
| 414 | Dygraph.prototype.getValue = function(row, col) { |
| 415 | if (row < 0 || row > this.rawData_.length) return null; |
| 416 | if (col < 0 || col > this.rawData_[row].length) return null; |
| 417 | |
| 418 | return this.rawData_[row][col]; |
| 419 | }; |
| 420 | |
| 421 | Dygraph.addEvent = function(el, evt, fn) { |
| 422 | var normed_fn = function(e) { |
| 423 | if (!e) var e = window.event; |
| 424 | fn(e); |
| 425 | }; |
| 426 | if (window.addEventListener) { // Mozilla, Netscape, Firefox |
| 427 | el.addEventListener(evt, normed_fn, false); |
| 428 | } else { // IE |
| 429 | el.attachEvent('on' + evt, normed_fn); |
| 430 | } |
| 431 | }; |
| 432 | |
| 433 | |
| 434 | // |
| 435 | // An attempt at scroll wheel management. |
| 436 | // |
| 437 | // Based on the article at |
| 438 | // http://www.switchonthecode.com/tutorials/javascript-tutorial-the-scroll-wheel |
| 439 | |
| 440 | Dygraph.cancelEvent = function(e) { |
| 441 | e = e ? e : window.event; |
| 442 | if (e.stopPropagation) { |
| 443 | e.stopPropagation(); |
| 444 | } |
| 445 | if (e.preventDefault) { |
| 446 | e.preventDefault(); |
| 447 | } |
| 448 | e.cancelBubble = true; |
| 449 | e.cancel = true; |
| 450 | e.returnValue = false; |
| 451 | return false; |
| 452 | } |
| 453 | |
| 454 | |
| 455 | /** |
| 456 | * Generates interface elements for the Dygraph: a containing div, a div to |
| 457 | * display the current point, and a textbox to adjust the rolling average |
| 458 | * period. Also creates the Renderer/Layout elements. |
| 459 | * @private |
| 460 | */ |
| 461 | Dygraph.prototype.createInterface_ = function() { |
| 462 | // Create the all-enclosing graph div |
| 463 | var enclosing = this.maindiv_; |
| 464 | |
| 465 | this.graphDiv = document.createElement("div"); |
| 466 | this.graphDiv.style.width = this.width_ + "px"; |
| 467 | this.graphDiv.style.height = this.height_ + "px"; |
| 468 | enclosing.appendChild(this.graphDiv); |
| 469 | |
| 470 | // Create the canvas for interactive parts of the chart. |
| 471 | this.canvas_ = Dygraph.createCanvas(); |
| 472 | this.canvas_.style.position = "absolute"; |
| 473 | this.canvas_.width = this.width_; |
| 474 | this.canvas_.height = this.height_; |
| 475 | this.canvas_.style.width = this.width_ + "px"; // for IE |
| 476 | this.canvas_.style.height = this.height_ + "px"; // for IE |
| 477 | |
| 478 | // ... and for static parts of the chart. |
| 479 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
| 480 | |
| 481 | // The interactive parts of the graph are drawn on top of the chart. |
| 482 | this.graphDiv.appendChild(this.hidden_); |
| 483 | this.graphDiv.appendChild(this.canvas_); |
| 484 | this.mouseEventElement_ = this.canvas_; |
| 485 | |
| 486 | var dygraph = this; |
| 487 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(e) { |
| 488 | dygraph.mouseMove_(e); |
| 489 | }); |
| 490 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(e) { |
| 491 | dygraph.mouseOut_(e); |
| 492 | }); |
| 493 | |
| 494 | // Create the grapher |
| 495 | // TODO(danvk): why does the Layout need its own set of options? |
| 496 | this.layoutOptions_ = { 'xOriginIsZero': false }; |
| 497 | Dygraph.update(this.layoutOptions_, this.attrs_); |
| 498 | Dygraph.update(this.layoutOptions_, this.user_attrs_); |
| 499 | Dygraph.update(this.layoutOptions_, { |
| 500 | 'errorBars': (this.attr_("errorBars") || this.attr_("customBars")) }); |
| 501 | |
| 502 | this.layout_ = new DygraphLayout(this, this.layoutOptions_); |
| 503 | |
| 504 | // TODO(danvk): why does the Renderer need its own set of options? |
| 505 | this.renderOptions_ = { colorScheme: this.colors_, |
| 506 | strokeColor: null, |
| 507 | axisLineWidth: Dygraph.AXIS_LINE_WIDTH }; |
| 508 | Dygraph.update(this.renderOptions_, this.attrs_); |
| 509 | Dygraph.update(this.renderOptions_, this.user_attrs_); |
| 510 | |
| 511 | this.createStatusMessage_(); |
| 512 | this.createDragInterface_(); |
| 513 | }; |
| 514 | |
| 515 | /** |
| 516 | * Detach DOM elements in the dygraph and null out all data references. |
| 517 | * Calling this when you're done with a dygraph can dramatically reduce memory |
| 518 | * usage. See, e.g., the tests/perf.html example. |
| 519 | */ |
| 520 | Dygraph.prototype.destroy = function() { |
| 521 | var removeRecursive = function(node) { |
| 522 | while (node.hasChildNodes()) { |
| 523 | removeRecursive(node.firstChild); |
| 524 | node.removeChild(node.firstChild); |
| 525 | } |
| 526 | }; |
| 527 | removeRecursive(this.maindiv_); |
| 528 | |
| 529 | var nullOut = function(obj) { |
| 530 | for (var n in obj) { |
| 531 | if (typeof(obj[n]) === 'object') { |
| 532 | obj[n] = null; |
| 533 | } |
| 534 | } |
| 535 | }; |
| 536 | |
| 537 | // These may not all be necessary, but it can't hurt... |
| 538 | nullOut(this.layout_); |
| 539 | nullOut(this.plotter_); |
| 540 | nullOut(this); |
| 541 | }; |
| 542 | |
| 543 | /** |
| 544 | * Creates the canvas containing the PlotKit graph. Only plotkit ever draws on |
| 545 | * this particular canvas. All Dygraph work is done on this.canvas_. |
| 546 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
| 547 | * @return {Object} The newly-created canvas |
| 548 | * @private |
| 549 | */ |
| 550 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
| 551 | var h = Dygraph.createCanvas(); |
| 552 | h.style.position = "absolute"; |
| 553 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
| 554 | // some extra area to make it easier to zoom in on the far left and far |
| 555 | // right. h needs to be precisely the plot area, so that clipping occurs. |
| 556 | h.style.top = canvas.style.top; |
| 557 | h.style.left = canvas.style.left; |
| 558 | h.width = this.width_; |
| 559 | h.height = this.height_; |
| 560 | h.style.width = this.width_ + "px"; // for IE |
| 561 | h.style.height = this.height_ + "px"; // for IE |
| 562 | return h; |
| 563 | }; |
| 564 | |
| 565 | // Taken from MochiKit.Color |
| 566 | Dygraph.hsvToRGB = function (hue, saturation, value) { |
| 567 | var red; |
| 568 | var green; |
| 569 | var blue; |
| 570 | if (saturation === 0) { |
| 571 | red = value; |
| 572 | green = value; |
| 573 | blue = value; |
| 574 | } else { |
| 575 | var i = Math.floor(hue * 6); |
| 576 | var f = (hue * 6) - i; |
| 577 | var p = value * (1 - saturation); |
| 578 | var q = value * (1 - (saturation * f)); |
| 579 | var t = value * (1 - (saturation * (1 - f))); |
| 580 | switch (i) { |
| 581 | case 1: red = q; green = value; blue = p; break; |
| 582 | case 2: red = p; green = value; blue = t; break; |
| 583 | case 3: red = p; green = q; blue = value; break; |
| 584 | case 4: red = t; green = p; blue = value; break; |
| 585 | case 5: red = value; green = p; blue = q; break; |
| 586 | case 6: // fall through |
| 587 | case 0: red = value; green = t; blue = p; break; |
| 588 | } |
| 589 | } |
| 590 | red = Math.floor(255 * red + 0.5); |
| 591 | green = Math.floor(255 * green + 0.5); |
| 592 | blue = Math.floor(255 * blue + 0.5); |
| 593 | return 'rgb(' + red + ',' + green + ',' + blue + ')'; |
| 594 | }; |
| 595 | |
| 596 | |
| 597 | /** |
| 598 | * Generate a set of distinct colors for the data series. This is done with a |
| 599 | * color wheel. Saturation/Value are customizable, and the hue is |
| 600 | * equally-spaced around the color wheel. If a custom set of colors is |
| 601 | * specified, that is used instead. |
| 602 | * @private |
| 603 | */ |
| 604 | Dygraph.prototype.setColors_ = function() { |
| 605 | // TODO(danvk): compute this directly into this.attrs_['colorScheme'] and do |
| 606 | // away with this.renderOptions_. |
| 607 | var num = this.attr_("labels").length - 1; |
| 608 | this.colors_ = []; |
| 609 | var colors = this.attr_('colors'); |
| 610 | if (!colors) { |
| 611 | var sat = this.attr_('colorSaturation') || 1.0; |
| 612 | var val = this.attr_('colorValue') || 0.5; |
| 613 | var half = Math.ceil(num / 2); |
| 614 | for (var i = 1; i <= num; i++) { |
| 615 | if (!this.visibility()[i-1]) continue; |
| 616 | // alternate colors for high contrast. |
| 617 | var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2); |
| 618 | var hue = (1.0 * idx/ (1 + num)); |
| 619 | this.colors_.push(Dygraph.hsvToRGB(hue, sat, val)); |
| 620 | } |
| 621 | } else { |
| 622 | for (var i = 0; i < num; i++) { |
| 623 | if (!this.visibility()[i]) continue; |
| 624 | var colorStr = colors[i % colors.length]; |
| 625 | this.colors_.push(colorStr); |
| 626 | } |
| 627 | } |
| 628 | |
| 629 | // TODO(danvk): update this w/r/t/ the new options system. |
| 630 | this.renderOptions_.colorScheme = this.colors_; |
| 631 | Dygraph.update(this.plotter_.options, this.renderOptions_); |
| 632 | Dygraph.update(this.layoutOptions_, this.user_attrs_); |
| 633 | Dygraph.update(this.layoutOptions_, this.attrs_); |
| 634 | } |
| 635 | |
| 636 | /** |
| 637 | * Return the list of colors. This is either the list of colors passed in the |
| 638 | * attributes, or the autogenerated list of rgb(r,g,b) strings. |
| 639 | * @return {Array<string>} The list of colors. |
| 640 | */ |
| 641 | Dygraph.prototype.getColors = function() { |
| 642 | return this.colors_; |
| 643 | }; |
| 644 | |
| 645 | // The following functions are from quirksmode.org with a modification for Safari from |
| 646 | // http://blog.firetree.net/2005/07/04/javascript-find-position/ |
| 647 | // http://www.quirksmode.org/js/findpos.html |
| 648 | Dygraph.findPosX = function(obj) { |
| 649 | var curleft = 0; |
| 650 | if(obj.offsetParent) |
| 651 | while(1) |
| 652 | { |
| 653 | curleft += obj.offsetLeft; |
| 654 | if(!obj.offsetParent) |
| 655 | break; |
| 656 | obj = obj.offsetParent; |
| 657 | } |
| 658 | else if(obj.x) |
| 659 | curleft += obj.x; |
| 660 | return curleft; |
| 661 | }; |
| 662 | |
| 663 | Dygraph.findPosY = function(obj) { |
| 664 | var curtop = 0; |
| 665 | if(obj.offsetParent) |
| 666 | while(1) |
| 667 | { |
| 668 | curtop += obj.offsetTop; |
| 669 | if(!obj.offsetParent) |
| 670 | break; |
| 671 | obj = obj.offsetParent; |
| 672 | } |
| 673 | else if(obj.y) |
| 674 | curtop += obj.y; |
| 675 | return curtop; |
| 676 | }; |
| 677 | |
| 678 | |
| 679 | |
| 680 | /** |
| 681 | * Create the div that contains information on the selected point(s) |
| 682 | * This goes in the top right of the canvas, unless an external div has already |
| 683 | * been specified. |
| 684 | * @private |
| 685 | */ |
| 686 | Dygraph.prototype.createStatusMessage_ = function() { |
| 687 | var userLabelsDiv = this.user_attrs_["labelsDiv"]; |
| 688 | if (userLabelsDiv && null != userLabelsDiv |
| 689 | && (typeof(userLabelsDiv) == "string" || userLabelsDiv instanceof String)) { |
| 690 | this.user_attrs_["labelsDiv"] = document.getElementById(userLabelsDiv); |
| 691 | } |
| 692 | if (!this.attr_("labelsDiv")) { |
| 693 | var divWidth = this.attr_('labelsDivWidth'); |
| 694 | var messagestyle = { |
| 695 | "position": "absolute", |
| 696 | "fontSize": "14px", |
| 697 | "zIndex": 10, |
| 698 | "width": divWidth + "px", |
| 699 | "top": "0px", |
| 700 | "left": (this.width_ - divWidth - 2) + "px", |
| 701 | "background": "white", |
| 702 | "textAlign": "left", |
| 703 | "overflow": "hidden"}; |
| 704 | Dygraph.update(messagestyle, this.attr_('labelsDivStyles')); |
| 705 | var div = document.createElement("div"); |
| 706 | for (var name in messagestyle) { |
| 707 | if (messagestyle.hasOwnProperty(name)) { |
| 708 | div.style[name] = messagestyle[name]; |
| 709 | } |
| 710 | } |
| 711 | this.graphDiv.appendChild(div); |
| 712 | this.attrs_.labelsDiv = div; |
| 713 | } |
| 714 | }; |
| 715 | |
| 716 | /** |
| 717 | * Position the labels div so that its right edge is flush with the right edge |
| 718 | * of the charting area. |
| 719 | */ |
| 720 | Dygraph.prototype.positionLabelsDiv_ = function() { |
| 721 | // Don't touch a user-specified labelsDiv. |
| 722 | if (this.user_attrs_.hasOwnProperty("labelsDiv")) return; |
| 723 | |
| 724 | var area = this.plotter_.area; |
| 725 | var div = this.attr_("labelsDiv"); |
| 726 | div.style.left = area.x + area.w - this.attr_("labelsDivWidth") - 1 + "px"; |
| 727 | }; |
| 728 | |
| 729 | /** |
| 730 | * Create the text box to adjust the averaging period |
| 731 | * @private |
| 732 | */ |
| 733 | Dygraph.prototype.createRollInterface_ = function() { |
| 734 | // Create a roller if one doesn't exist already. |
| 735 | if (!this.roller_) { |
| 736 | this.roller_ = document.createElement("input"); |
| 737 | this.roller_.type = "text"; |
| 738 | this.roller_.style.display = "none"; |
| 739 | this.graphDiv.appendChild(this.roller_); |
| 740 | } |
| 741 | |
| 742 | var display = this.attr_('showRoller') ? 'block' : 'none'; |
| 743 | |
| 744 | var textAttr = { "position": "absolute", |
| 745 | "zIndex": 10, |
| 746 | "top": (this.plotter_.area.h - 25) + "px", |
| 747 | "left": (this.plotter_.area.x + 1) + "px", |
| 748 | "display": display |
| 749 | }; |
| 750 | this.roller_.size = "2"; |
| 751 | this.roller_.value = this.rollPeriod_; |
| 752 | for (var name in textAttr) { |
| 753 | if (textAttr.hasOwnProperty(name)) { |
| 754 | this.roller_.style[name] = textAttr[name]; |
| 755 | } |
| 756 | } |
| 757 | |
| 758 | var dygraph = this; |
| 759 | this.roller_.onchange = function() { dygraph.adjustRoll(dygraph.roller_.value); }; |
| 760 | }; |
| 761 | |
| 762 | // These functions are taken from MochiKit.Signal |
| 763 | Dygraph.pageX = function(e) { |
| 764 | if (e.pageX) { |
| 765 | return (!e.pageX || e.pageX < 0) ? 0 : e.pageX; |
| 766 | } else { |
| 767 | var de = document; |
| 768 | var b = document.body; |
| 769 | return e.clientX + |
| 770 | (de.scrollLeft || b.scrollLeft) - |
| 771 | (de.clientLeft || 0); |
| 772 | } |
| 773 | }; |
| 774 | |
| 775 | Dygraph.pageY = function(e) { |
| 776 | if (e.pageY) { |
| 777 | return (!e.pageY || e.pageY < 0) ? 0 : e.pageY; |
| 778 | } else { |
| 779 | var de = document; |
| 780 | var b = document.body; |
| 781 | return e.clientY + |
| 782 | (de.scrollTop || b.scrollTop) - |
| 783 | (de.clientTop || 0); |
| 784 | } |
| 785 | }; |
| 786 | |
| 787 | Dygraph.prototype.dragGetX_ = function(e, context) { |
| 788 | return Dygraph.pageX(e) - context.px |
| 789 | }; |
| 790 | |
| 791 | Dygraph.prototype.dragGetY_ = function(e, context) { |
| 792 | return Dygraph.pageY(e) - context.py |
| 793 | }; |
| 794 | |
| 795 | Dygraph.startPan = function(event, g, context) { |
| 796 | // have to be zoomed in to pan. |
| 797 | var zoomedY = false; |
| 798 | for (var i = 0; i < g.axes_.length; i++) { |
| 799 | if (g.axes_[i].valueWindow || g.axes_[i].valueRange) { |
| 800 | zoomedY = true; |
| 801 | break; |
| 802 | } |
| 803 | } |
| 804 | if (!g.dateWindow_ && !zoomedY) return; |
| 805 | |
| 806 | context.isPanning = true; |
| 807 | var xRange = g.xAxisRange(); |
| 808 | context.dateRange = xRange[1] - xRange[0]; |
| 809 | |
| 810 | // Record the range of each y-axis at the start of the drag. |
| 811 | // If any axis has a valueRange or valueWindow, then we want a 2D pan. |
| 812 | context.is2DPan = false; |
| 813 | for (var i = 0; i < g.axes_.length; i++) { |
| 814 | var axis = g.axes_[i]; |
| 815 | var yRange = g.yAxisRange(i); |
| 816 | axis.dragValueRange = yRange[1] - yRange[0]; |
| 817 | var r = g.toDataCoords(null, context.dragStartY, i); |
| 818 | axis.draggingValue = r[1]; |
| 819 | if (axis.valueWindow || axis.valueRange) context.is2DPan = true; |
| 820 | } |
| 821 | |
| 822 | // TODO(konigsberg): Switch from all this math to toDataCoords? |
| 823 | // Seems to work for the dragging value. |
| 824 | context.draggingDate = (context.dragStartX / g.width_) * context.dateRange + xRange[0]; |
| 825 | }; |
| 826 | |
| 827 | Dygraph.movePan = function(event, g, context) { |
| 828 | context.dragEndX = g.dragGetX_(event, context); |
| 829 | context.dragEndY = g.dragGetY_(event, context); |
| 830 | |
| 831 | // TODO(danvk): update this comment |
| 832 | // Want to have it so that: |
| 833 | // 1. draggingDate appears at dragEndX, draggingValue appears at dragEndY. |
| 834 | // 2. daterange = (dateWindow_[1] - dateWindow_[0]) is unaltered. |
| 835 | // 3. draggingValue appears at dragEndY. |
| 836 | // 4. valueRange is unaltered. |
| 837 | |
| 838 | var minDate = context.draggingDate - (context.dragEndX / g.width_) * context.dateRange; |
| 839 | var maxDate = minDate + context.dateRange; |
| 840 | g.dateWindow_ = [minDate, maxDate]; |
| 841 | |
| 842 | // y-axis scaling is automatic unless this is a full 2D pan. |
| 843 | if (context.is2DPan) { |
| 844 | // Adjust each axis appropriately. |
| 845 | var y_frac = context.dragEndY / g.height_; |
| 846 | for (var i = 0; i < g.axes_.length; i++) { |
| 847 | var axis = g.axes_[i]; |
| 848 | var maxValue = axis.draggingValue + y_frac * axis.dragValueRange; |
| 849 | var minValue = maxValue - axis.dragValueRange; |
| 850 | axis.valueWindow = [ minValue, maxValue ]; |
| 851 | } |
| 852 | } |
| 853 | |
| 854 | g.drawGraph_(); |
| 855 | } |
| 856 | |
| 857 | Dygraph.endPan = function(event, g, context) { |
| 858 | context.isPanning = false; |
| 859 | context.is2DPan = false; |
| 860 | context.draggingDate = null; |
| 861 | context.dateRange = null; |
| 862 | context.valueRange = null; |
| 863 | } |
| 864 | |
| 865 | Dygraph.startZoom = function(event, g, context) { |
| 866 | context.isZooming = true; |
| 867 | } |
| 868 | |
| 869 | Dygraph.moveZoom = function(event, g, context) { |
| 870 | context.dragEndX = g.dragGetX_(event, context); |
| 871 | context.dragEndY = g.dragGetY_(event, context); |
| 872 | |
| 873 | var xDelta = Math.abs(context.dragStartX - context.dragEndX); |
| 874 | var yDelta = Math.abs(context.dragStartY - context.dragEndY); |
| 875 | |
| 876 | // drag direction threshold for y axis is twice as large as x axis |
| 877 | context.dragDirection = (xDelta < yDelta / 2) ? Dygraph.VERTICAL : Dygraph.HORIZONTAL; |
| 878 | |
| 879 | g.drawZoomRect_( |
| 880 | context.dragDirection, |
| 881 | context.dragStartX, |
| 882 | context.dragEndX, |
| 883 | context.dragStartY, |
| 884 | context.dragEndY, |
| 885 | context.prevDragDirection, |
| 886 | context.prevEndX, |
| 887 | context.prevEndY); |
| 888 | |
| 889 | context.prevEndX = context.dragEndX; |
| 890 | context.prevEndY = context.dragEndY; |
| 891 | context.prevDragDirection = context.dragDirection; |
| 892 | } |
| 893 | |
| 894 | Dygraph.endZoom = function(event, g, context) { |
| 895 | context.isZooming = false; |
| 896 | context.dragEndX = g.dragGetX_(event, context); |
| 897 | context.dragEndY = g.dragGetY_(event, context); |
| 898 | var regionWidth = Math.abs(context.dragEndX - context.dragStartX); |
| 899 | var regionHeight = Math.abs(context.dragEndY - context.dragStartY); |
| 900 | |
| 901 | if (regionWidth < 2 && regionHeight < 2 && |
| 902 | g.lastx_ != undefined && g.lastx_ != -1) { |
| 903 | // TODO(danvk): pass along more info about the points, e.g. 'x' |
| 904 | if (g.attr_('clickCallback') != null) { |
| 905 | g.attr_('clickCallback')(event, g.lastx_, g.selPoints_); |
| 906 | } |
| 907 | if (g.attr_('pointClickCallback')) { |
| 908 | // check if the click was on a particular point. |
| 909 | var closestIdx = -1; |
| 910 | var closestDistance = 0; |
| 911 | for (var i = 0; i < g.selPoints_.length; i++) { |
| 912 | var p = g.selPoints_[i]; |
| 913 | var distance = Math.pow(p.canvasx - context.dragEndX, 2) + |
| 914 | Math.pow(p.canvasy - context.dragEndY, 2); |
| 915 | if (closestIdx == -1 || distance < closestDistance) { |
| 916 | closestDistance = distance; |
| 917 | closestIdx = i; |
| 918 | } |
| 919 | } |
| 920 | |
| 921 | // Allow any click within two pixels of the dot. |
| 922 | var radius = g.attr_('highlightCircleSize') + 2; |
| 923 | if (closestDistance <= 5 * 5) { |
| 924 | g.attr_('pointClickCallback')(event, g.selPoints_[closestIdx]); |
| 925 | } |
| 926 | } |
| 927 | } |
| 928 | |
| 929 | if (regionWidth >= 10 && context.dragDirection == Dygraph.HORIZONTAL) { |
| 930 | g.doZoomX_(Math.min(context.dragStartX, context.dragEndX), |
| 931 | Math.max(context.dragStartX, context.dragEndX)); |
| 932 | } else if (regionHeight >= 10 && context.dragDirection == Dygraph.VERTICAL) { |
| 933 | g.doZoomY_(Math.min(context.dragStartY, context.dragEndY), |
| 934 | Math.max(context.dragStartY, context.dragEndY)); |
| 935 | } else { |
| 936 | g.canvas_.getContext("2d").clearRect(0, 0, |
| 937 | g.canvas_.width, |
| 938 | g.canvas_.height); |
| 939 | } |
| 940 | context.dragStartX = null; |
| 941 | context.dragStartY = null; |
| 942 | } |
| 943 | |
| 944 | Dygraph.prototype.defaultInteractionModel = { |
| 945 | // Track the beginning of drag events |
| 946 | 'mousedown' : function(event, g, context) { |
| 947 | context.initializeMouseDown(event, g, context); |
| 948 | |
| 949 | if (event.altKey || event.shiftKey) { |
| 950 | Dygraph.startPan(event, g, context); |
| 951 | } else { |
| 952 | Dygraph.startZoom(event, g, context); |
| 953 | } |
| 954 | }, |
| 955 | |
| 956 | // Draw zoom rectangles when the mouse is down and the user moves around |
| 957 | 'mousemove' : function(event, g, context) { |
| 958 | if (context.isZooming) { |
| 959 | Dygraph.moveZoom(event, g, context); |
| 960 | } else if (context.isPanning) { |
| 961 | Dygraph.movePan(event, g, context); |
| 962 | } |
| 963 | }, |
| 964 | |
| 965 | 'mouseup' : function(event, g, context) { |
| 966 | if (context.isZooming) { |
| 967 | Dygraph.endZoom(event, g, context); |
| 968 | } else if (context.isPanning) { |
| 969 | Dygraph.endPan(event, g, context); |
| 970 | } |
| 971 | }, |
| 972 | |
| 973 | // Temporarily cancel the dragging event when the mouse leaves the graph |
| 974 | 'mouseout' : function(event, g, context) { |
| 975 | if (context.isZooming) { |
| 976 | context.dragEndX = null; |
| 977 | context.dragEndY = null; |
| 978 | } |
| 979 | }, |
| 980 | |
| 981 | // Disable zooming out if panning. |
| 982 | 'dblclick' : function(event, g, context) { |
| 983 | if (event.altKey || event.shiftKey) { |
| 984 | return; |
| 985 | } |
| 986 | g.doUnzoom_(); |
| 987 | } |
| 988 | }; |
| 989 | |
| 990 | /** |
| 991 | * Set up all the mouse handlers needed to capture dragging behavior for zoom |
| 992 | * events. |
| 993 | * @private |
| 994 | */ |
| 995 | Dygraph.prototype.createDragInterface_ = function() { |
| 996 | var context = { |
| 997 | // Tracks whether the mouse is down right now |
| 998 | isZooming : false, |
| 999 | isPanning : false, // is this drag part of a pan? |
| 1000 | is2DPan : false, // if so, is that pan 1- or 2-dimensional? |
| 1001 | dragStartX : null, |
| 1002 | dragStartY : null, |
| 1003 | dragEndX : null, |
| 1004 | dragEndY : null, |
| 1005 | dragDirection : null, |
| 1006 | prevEndX : null, |
| 1007 | prevEndY : null, |
| 1008 | prevDragDirection : null, |
| 1009 | |
| 1010 | // TODO(danvk): update this comment |
| 1011 | // draggingDate and draggingValue represent the [date,value] point on the |
| 1012 | // graph at which the mouse was pressed. As the mouse moves while panning, |
| 1013 | // the viewport must pan so that the mouse position points to |
| 1014 | // [draggingDate, draggingValue] |
| 1015 | draggingDate : null, |
| 1016 | |
| 1017 | // TODO(danvk): update this comment |
| 1018 | // The range in second/value units that the viewport encompasses during a |
| 1019 | // panning operation. |
| 1020 | dateRange : null, |
| 1021 | |
| 1022 | // Utility function to convert page-wide coordinates to canvas coords |
| 1023 | px : 0, |
| 1024 | py : 0, |
| 1025 | |
| 1026 | initializeMouseDown : function(event, g, context) { |
| 1027 | // prevents mouse drags from selecting page text. |
| 1028 | if (event.preventDefault) { |
| 1029 | event.preventDefault(); // Firefox, Chrome, etc. |
| 1030 | } else { |
| 1031 | event.returnValue = false; // IE |
| 1032 | event.cancelBubble = true; |
| 1033 | } |
| 1034 | |
| 1035 | context.px = Dygraph.findPosX(g.canvas_); |
| 1036 | context.py = Dygraph.findPosY(g.canvas_); |
| 1037 | context.dragStartX = g.dragGetX_(event, context); |
| 1038 | context.dragStartY = g.dragGetY_(event, context); |
| 1039 | } |
| 1040 | }; |
| 1041 | |
| 1042 | // Defines default behavior if there are no event handlers. |
| 1043 | var handlers = this.user_attrs_.interactionModel || this.defaultInteractionModel; |
| 1044 | |
| 1045 | // Function that binds g and context to the handler. |
| 1046 | var bindHandler = function(handler, g) { |
| 1047 | return function(event) { |
| 1048 | handler(event, g, context); |
| 1049 | }; |
| 1050 | }; |
| 1051 | |
| 1052 | for (var eventName in handlers) { |
| 1053 | Dygraph.addEvent(this.mouseEventElement_, eventName, |
| 1054 | bindHandler(handlers[eventName], this)); |
| 1055 | } |
| 1056 | |
| 1057 | // Self is the graph. |
| 1058 | var self = this; |
| 1059 | |
| 1060 | // If the user releases the mouse button during a drag, but not over the |
| 1061 | // canvas, then it doesn't count as a zooming action. |
| 1062 | Dygraph.addEvent(document, 'mouseup', function(event) { |
| 1063 | if (context.isZooming || context.isPanning) { |
| 1064 | context.isZooming = false; |
| 1065 | context.dragStartX = null; |
| 1066 | context.dragStartY = null; |
| 1067 | } |
| 1068 | |
| 1069 | if (context.isPanning) { |
| 1070 | context.isPanning = false; |
| 1071 | context.draggingDate = null; |
| 1072 | context.dateRange = null; |
| 1073 | for (var i = 0; i < self.axes_.length; i++) { |
| 1074 | delete self.axes_[i].draggingValue; |
| 1075 | delete self.axes_[i].dragValueRange; |
| 1076 | } |
| 1077 | } |
| 1078 | }); |
| 1079 | }; |
| 1080 | |
| 1081 | /** |
| 1082 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears |
| 1083 | * up any previous zoom rectangles that were drawn. This could be optimized to |
| 1084 | * avoid extra redrawing, but it's tricky to avoid contexts with the status |
| 1085 | * dots. |
| 1086 | * |
| 1087 | * @param {Number} direction the direction of the zoom rectangle. Acceptable |
| 1088 | * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL. |
| 1089 | * @param {Number} startX The X position where the drag started, in canvas |
| 1090 | * coordinates. |
| 1091 | * @param {Number} endX The current X position of the drag, in canvas coords. |
| 1092 | * @param {Number} startY The Y position where the drag started, in canvas |
| 1093 | * coordinates. |
| 1094 | * @param {Number} endY The current Y position of the drag, in canvas coords. |
| 1095 | * @param {Number} prevDirection the value of direction on the previous call to |
| 1096 | * this function. Used to avoid excess redrawing |
| 1097 | * @param {Number} prevEndX The value of endX on the previous call to this |
| 1098 | * function. Used to avoid excess redrawing |
| 1099 | * @param {Number} prevEndY The value of endY on the previous call to this |
| 1100 | * function. Used to avoid excess redrawing |
| 1101 | * @private |
| 1102 | */ |
| 1103 | Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY, endY, |
| 1104 | prevDirection, prevEndX, prevEndY) { |
| 1105 | var ctx = this.canvas_.getContext("2d"); |
| 1106 | |
| 1107 | // Clean up from the previous rect if necessary |
| 1108 | if (prevDirection == Dygraph.HORIZONTAL) { |
| 1109 | ctx.clearRect(Math.min(startX, prevEndX), 0, |
| 1110 | Math.abs(startX - prevEndX), this.height_); |
| 1111 | } else if (prevDirection == Dygraph.VERTICAL){ |
| 1112 | ctx.clearRect(0, Math.min(startY, prevEndY), |
| 1113 | this.width_, Math.abs(startY - prevEndY)); |
| 1114 | } |
| 1115 | |
| 1116 | // Draw a light-grey rectangle to show the new viewing area |
| 1117 | if (direction == Dygraph.HORIZONTAL) { |
| 1118 | if (endX && startX) { |
| 1119 | ctx.fillStyle = "rgba(128,128,128,0.33)"; |
| 1120 | ctx.fillRect(Math.min(startX, endX), 0, |
| 1121 | Math.abs(endX - startX), this.height_); |
| 1122 | } |
| 1123 | } |
| 1124 | if (direction == Dygraph.VERTICAL) { |
| 1125 | if (endY && startY) { |
| 1126 | ctx.fillStyle = "rgba(128,128,128,0.33)"; |
| 1127 | ctx.fillRect(0, Math.min(startY, endY), |
| 1128 | this.width_, Math.abs(endY - startY)); |
| 1129 | } |
| 1130 | } |
| 1131 | }; |
| 1132 | |
| 1133 | /** |
| 1134 | * Zoom to something containing [lowX, highX]. These are pixel coordinates in |
| 1135 | * the canvas. The exact zoom window may be slightly larger if there are no data |
| 1136 | * points near lowX or highX. Don't confuse this function with doZoomXDates, |
| 1137 | * which accepts dates that match the raw data. This function redraws the graph. |
| 1138 | * |
| 1139 | * @param {Number} lowX The leftmost pixel value that should be visible. |
| 1140 | * @param {Number} highX The rightmost pixel value that should be visible. |
| 1141 | * @private |
| 1142 | */ |
| 1143 | Dygraph.prototype.doZoomX_ = function(lowX, highX) { |
| 1144 | // Find the earliest and latest dates contained in this canvasx range. |
| 1145 | // Convert the call to date ranges of the raw data. |
| 1146 | var r = this.toDataCoords(lowX, null); |
| 1147 | var minDate = r[0]; |
| 1148 | r = this.toDataCoords(highX, null); |
| 1149 | var maxDate = r[0]; |
| 1150 | this.doZoomXDates_(minDate, maxDate); |
| 1151 | }; |
| 1152 | |
| 1153 | /** |
| 1154 | * Zoom to something containing [minDate, maxDate] values. Don't confuse this |
| 1155 | * method with doZoomX which accepts pixel coordinates. This function redraws |
| 1156 | * the graph. |
| 1157 | * |
| 1158 | * @param {Number} minDate The minimum date that should be visible. |
| 1159 | * @param {Number} maxDate The maximum date that should be visible. |
| 1160 | * @private |
| 1161 | */ |
| 1162 | Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) { |
| 1163 | this.dateWindow_ = [minDate, maxDate]; |
| 1164 | this.drawGraph_(); |
| 1165 | if (this.attr_("zoomCallback")) { |
| 1166 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); |
| 1167 | } |
| 1168 | }; |
| 1169 | |
| 1170 | /** |
| 1171 | * Zoom to something containing [lowY, highY]. These are pixel coordinates in |
| 1172 | * the canvas. This function redraws the graph. |
| 1173 | * |
| 1174 | * @param {Number} lowY The topmost pixel value that should be visible. |
| 1175 | * @param {Number} highY The lowest pixel value that should be visible. |
| 1176 | * @private |
| 1177 | */ |
| 1178 | Dygraph.prototype.doZoomY_ = function(lowY, highY) { |
| 1179 | // Find the highest and lowest values in pixel range for each axis. |
| 1180 | // Note that lowY (in pixels) corresponds to the max Value (in data coords). |
| 1181 | // This is because pixels increase as you go down on the screen, whereas data |
| 1182 | // coordinates increase as you go up the screen. |
| 1183 | var valueRanges = []; |
| 1184 | for (var i = 0; i < this.axes_.length; i++) { |
| 1185 | var hi = this.toDataCoords(null, lowY, i); |
| 1186 | var low = this.toDataCoords(null, highY, i); |
| 1187 | this.axes_[i].valueWindow = [low[1], hi[1]]; |
| 1188 | valueRanges.push([low[1], hi[1]]); |
| 1189 | } |
| 1190 | |
| 1191 | this.drawGraph_(); |
| 1192 | if (this.attr_("zoomCallback")) { |
| 1193 | var xRange = this.xAxisRange(); |
| 1194 | this.attr_("zoomCallback")(xRange[0], xRange[1], this.yAxisRanges()); |
| 1195 | } |
| 1196 | }; |
| 1197 | |
| 1198 | /** |
| 1199 | * Reset the zoom to the original view coordinates. This is the same as |
| 1200 | * double-clicking on the graph. |
| 1201 | * |
| 1202 | * @private |
| 1203 | */ |
| 1204 | Dygraph.prototype.doUnzoom_ = function() { |
| 1205 | var dirty = false; |
| 1206 | if (this.dateWindow_ != null) { |
| 1207 | dirty = true; |
| 1208 | this.dateWindow_ = null; |
| 1209 | } |
| 1210 | |
| 1211 | for (var i = 0; i < this.axes_.length; i++) { |
| 1212 | if (this.axes_[i].valueWindow != null) { |
| 1213 | dirty = true; |
| 1214 | delete this.axes_[i].valueWindow; |
| 1215 | } |
| 1216 | } |
| 1217 | |
| 1218 | if (dirty) { |
| 1219 | // Putting the drawing operation before the callback because it resets |
| 1220 | // yAxisRange. |
| 1221 | this.drawGraph_(); |
| 1222 | if (this.attr_("zoomCallback")) { |
| 1223 | var minDate = this.rawData_[0][0]; |
| 1224 | var maxDate = this.rawData_[this.rawData_.length - 1][0]; |
| 1225 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); |
| 1226 | } |
| 1227 | } |
| 1228 | }; |
| 1229 | |
| 1230 | /** |
| 1231 | * When the mouse moves in the canvas, display information about a nearby data |
| 1232 | * point and draw dots over those points in the data series. This function |
| 1233 | * takes care of cleanup of previously-drawn dots. |
| 1234 | * @param {Object} event The mousemove event from the browser. |
| 1235 | * @private |
| 1236 | */ |
| 1237 | Dygraph.prototype.mouseMove_ = function(event) { |
| 1238 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_); |
| 1239 | var points = this.layout_.points; |
| 1240 | |
| 1241 | var lastx = -1; |
| 1242 | var lasty = -1; |
| 1243 | |
| 1244 | // Loop through all the points and find the date nearest to our current |
| 1245 | // location. |
| 1246 | var minDist = 1e+100; |
| 1247 | var idx = -1; |
| 1248 | for (var i = 0; i < points.length; i++) { |
| 1249 | var point = points[i]; |
| 1250 | if (point == null) continue; |
| 1251 | var dist = Math.abs(point.canvasx - canvasx); |
| 1252 | if (dist > minDist) continue; |
| 1253 | minDist = dist; |
| 1254 | idx = i; |
| 1255 | } |
| 1256 | if (idx >= 0) lastx = points[idx].xval; |
| 1257 | // Check that you can really highlight the last day's data |
| 1258 | var last = points[points.length-1]; |
| 1259 | if (last != null && canvasx > last.canvasx) |
| 1260 | lastx = points[points.length-1].xval; |
| 1261 | |
| 1262 | // Extract the points we've selected |
| 1263 | this.selPoints_ = []; |
| 1264 | var l = points.length; |
| 1265 | if (!this.attr_("stackedGraph")) { |
| 1266 | for (var i = 0; i < l; i++) { |
| 1267 | if (points[i].xval == lastx) { |
| 1268 | this.selPoints_.push(points[i]); |
| 1269 | } |
| 1270 | } |
| 1271 | } else { |
| 1272 | // Need to 'unstack' points starting from the bottom |
| 1273 | var cumulative_sum = 0; |
| 1274 | for (var i = l - 1; i >= 0; i--) { |
| 1275 | if (points[i].xval == lastx) { |
| 1276 | var p = {}; // Clone the point since we modify it |
| 1277 | for (var k in points[i]) { |
| 1278 | p[k] = points[i][k]; |
| 1279 | } |
| 1280 | p.yval -= cumulative_sum; |
| 1281 | cumulative_sum += p.yval; |
| 1282 | this.selPoints_.push(p); |
| 1283 | } |
| 1284 | } |
| 1285 | this.selPoints_.reverse(); |
| 1286 | } |
| 1287 | |
| 1288 | if (this.attr_("highlightCallback")) { |
| 1289 | var px = this.lastx_; |
| 1290 | if (px !== null && lastx != px) { |
| 1291 | // only fire if the selected point has changed. |
| 1292 | this.attr_("highlightCallback")(event, lastx, this.selPoints_, this.idxToRow_(idx)); |
| 1293 | } |
| 1294 | } |
| 1295 | |
| 1296 | // Save last x position for callbacks. |
| 1297 | this.lastx_ = lastx; |
| 1298 | |
| 1299 | this.updateSelection_(); |
| 1300 | }; |
| 1301 | |
| 1302 | /** |
| 1303 | * Transforms layout_.points index into data row number. |
| 1304 | * @param int layout_.points index |
| 1305 | * @return int row number, or -1 if none could be found. |
| 1306 | * @private |
| 1307 | */ |
| 1308 | Dygraph.prototype.idxToRow_ = function(idx) { |
| 1309 | if (idx < 0) return -1; |
| 1310 | |
| 1311 | for (var i in this.layout_.datasets) { |
| 1312 | if (idx < this.layout_.datasets[i].length) { |
| 1313 | return this.boundaryIds_[0][0]+idx; |
| 1314 | } |
| 1315 | idx -= this.layout_.datasets[i].length; |
| 1316 | } |
| 1317 | return -1; |
| 1318 | }; |
| 1319 | |
| 1320 | /** |
| 1321 | * Draw dots over the selectied points in the data series. This function |
| 1322 | * takes care of cleanup of previously-drawn dots. |
| 1323 | * @private |
| 1324 | */ |
| 1325 | Dygraph.prototype.updateSelection_ = function() { |
| 1326 | // Clear the previously drawn vertical, if there is one |
| 1327 | var ctx = this.canvas_.getContext("2d"); |
| 1328 | if (this.previousVerticalX_ >= 0) { |
| 1329 | // Determine the maximum highlight circle size. |
| 1330 | var maxCircleSize = 0; |
| 1331 | var labels = this.attr_('labels'); |
| 1332 | for (var i = 1; i < labels.length; i++) { |
| 1333 | var r = this.attr_('highlightCircleSize', labels[i]); |
| 1334 | if (r > maxCircleSize) maxCircleSize = r; |
| 1335 | } |
| 1336 | var px = this.previousVerticalX_; |
| 1337 | ctx.clearRect(px - maxCircleSize - 1, 0, |
| 1338 | 2 * maxCircleSize + 2, this.height_); |
| 1339 | } |
| 1340 | |
| 1341 | var isOK = function(x) { return x && !isNaN(x); }; |
| 1342 | |
| 1343 | if (this.selPoints_.length > 0) { |
| 1344 | var canvasx = this.selPoints_[0].canvasx; |
| 1345 | |
| 1346 | // Set the status message to indicate the selected point(s) |
| 1347 | var replace = this.attr_('xValueFormatter')(this.lastx_, this) + ":"; |
| 1348 | var fmtFunc = this.attr_('yValueFormatter'); |
| 1349 | var clen = this.colors_.length; |
| 1350 | |
| 1351 | if (this.attr_('showLabelsOnHighlight')) { |
| 1352 | // Set the status message to indicate the selected point(s) |
| 1353 | for (var i = 0; i < this.selPoints_.length; i++) { |
| 1354 | if (!this.attr_("labelsShowZeroValues") && this.selPoints_[i].yval == 0) continue; |
| 1355 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
| 1356 | if (this.attr_("labelsSeparateLines")) { |
| 1357 | replace += "<br/>"; |
| 1358 | } |
| 1359 | var point = this.selPoints_[i]; |
| 1360 | var c = new RGBColor(this.plotter_.colors[point.name]); |
| 1361 | var yval = fmtFunc(point.yval); |
| 1362 | replace += " <b><font color='" + c.toHex() + "'>" |
| 1363 | + point.name + "</font></b>:" |
| 1364 | + yval; |
| 1365 | } |
| 1366 | |
| 1367 | this.attr_("labelsDiv").innerHTML = replace; |
| 1368 | } |
| 1369 | |
| 1370 | // Draw colored circles over the center of each selected point |
| 1371 | ctx.save(); |
| 1372 | for (var i = 0; i < this.selPoints_.length; i++) { |
| 1373 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
| 1374 | var circleSize = |
| 1375 | this.attr_('highlightCircleSize', this.selPoints_[i].name); |
| 1376 | ctx.beginPath(); |
| 1377 | ctx.fillStyle = this.plotter_.colors[this.selPoints_[i].name]; |
| 1378 | ctx.arc(canvasx, this.selPoints_[i].canvasy, circleSize, |
| 1379 | 0, 2 * Math.PI, false); |
| 1380 | ctx.fill(); |
| 1381 | } |
| 1382 | ctx.restore(); |
| 1383 | |
| 1384 | this.previousVerticalX_ = canvasx; |
| 1385 | } |
| 1386 | }; |
| 1387 | |
| 1388 | /** |
| 1389 | * Set manually set selected dots, and display information about them |
| 1390 | * @param int row number that should by highlighted |
| 1391 | * false value clears the selection |
| 1392 | * @public |
| 1393 | */ |
| 1394 | Dygraph.prototype.setSelection = function(row) { |
| 1395 | // Extract the points we've selected |
| 1396 | this.selPoints_ = []; |
| 1397 | var pos = 0; |
| 1398 | |
| 1399 | if (row !== false) { |
| 1400 | row = row-this.boundaryIds_[0][0]; |
| 1401 | } |
| 1402 | |
| 1403 | if (row !== false && row >= 0) { |
| 1404 | for (var i in this.layout_.datasets) { |
| 1405 | if (row < this.layout_.datasets[i].length) { |
| 1406 | var point = this.layout_.points[pos+row]; |
| 1407 | |
| 1408 | if (this.attr_("stackedGraph")) { |
| 1409 | point = this.layout_.unstackPointAtIndex(pos+row); |
| 1410 | } |
| 1411 | |
| 1412 | this.selPoints_.push(point); |
| 1413 | } |
| 1414 | pos += this.layout_.datasets[i].length; |
| 1415 | } |
| 1416 | } |
| 1417 | |
| 1418 | if (this.selPoints_.length) { |
| 1419 | this.lastx_ = this.selPoints_[0].xval; |
| 1420 | this.updateSelection_(); |
| 1421 | } else { |
| 1422 | this.lastx_ = -1; |
| 1423 | this.clearSelection(); |
| 1424 | } |
| 1425 | |
| 1426 | }; |
| 1427 | |
| 1428 | /** |
| 1429 | * The mouse has left the canvas. Clear out whatever artifacts remain |
| 1430 | * @param {Object} event the mouseout event from the browser. |
| 1431 | * @private |
| 1432 | */ |
| 1433 | Dygraph.prototype.mouseOut_ = function(event) { |
| 1434 | if (this.attr_("unhighlightCallback")) { |
| 1435 | this.attr_("unhighlightCallback")(event); |
| 1436 | } |
| 1437 | |
| 1438 | if (this.attr_("hideOverlayOnMouseOut")) { |
| 1439 | this.clearSelection(); |
| 1440 | } |
| 1441 | }; |
| 1442 | |
| 1443 | /** |
| 1444 | * Remove all selection from the canvas |
| 1445 | * @public |
| 1446 | */ |
| 1447 | Dygraph.prototype.clearSelection = function() { |
| 1448 | // Get rid of the overlay data |
| 1449 | var ctx = this.canvas_.getContext("2d"); |
| 1450 | ctx.clearRect(0, 0, this.width_, this.height_); |
| 1451 | this.attr_("labelsDiv").innerHTML = ""; |
| 1452 | this.selPoints_ = []; |
| 1453 | this.lastx_ = -1; |
| 1454 | } |
| 1455 | |
| 1456 | /** |
| 1457 | * Returns the number of the currently selected row |
| 1458 | * @return int row number, of -1 if nothing is selected |
| 1459 | * @public |
| 1460 | */ |
| 1461 | Dygraph.prototype.getSelection = function() { |
| 1462 | if (!this.selPoints_ || this.selPoints_.length < 1) { |
| 1463 | return -1; |
| 1464 | } |
| 1465 | |
| 1466 | for (var row=0; row<this.layout_.points.length; row++ ) { |
| 1467 | if (this.layout_.points[row].x == this.selPoints_[0].x) { |
| 1468 | return row + this.boundaryIds_[0][0]; |
| 1469 | } |
| 1470 | } |
| 1471 | return -1; |
| 1472 | } |
| 1473 | |
| 1474 | Dygraph.zeropad = function(x) { |
| 1475 | if (x < 10) return "0" + x; else return "" + x; |
| 1476 | } |
| 1477 | |
| 1478 | /** |
| 1479 | * Return a string version of the hours, minutes and seconds portion of a date. |
| 1480 | * @param {Number} date The JavaScript date (ms since epoch) |
| 1481 | * @return {String} A time of the form "HH:MM:SS" |
| 1482 | * @private |
| 1483 | */ |
| 1484 | Dygraph.hmsString_ = function(date) { |
| 1485 | var zeropad = Dygraph.zeropad; |
| 1486 | var d = new Date(date); |
| 1487 | if (d.getSeconds()) { |
| 1488 | return zeropad(d.getHours()) + ":" + |
| 1489 | zeropad(d.getMinutes()) + ":" + |
| 1490 | zeropad(d.getSeconds()); |
| 1491 | } else { |
| 1492 | return zeropad(d.getHours()) + ":" + zeropad(d.getMinutes()); |
| 1493 | } |
| 1494 | } |
| 1495 | |
| 1496 | /** |
| 1497 | * Convert a JS date to a string appropriate to display on an axis that |
| 1498 | * is displaying values at the stated granularity. |
| 1499 | * @param {Date} date The date to format |
| 1500 | * @param {Number} granularity One of the Dygraph granularity constants |
| 1501 | * @return {String} The formatted date |
| 1502 | * @private |
| 1503 | */ |
| 1504 | Dygraph.dateAxisFormatter = function(date, granularity) { |
| 1505 | if (granularity >= Dygraph.MONTHLY) { |
| 1506 | return date.strftime('%b %y'); |
| 1507 | } else { |
| 1508 | var frac = date.getHours() * 3600 + date.getMinutes() * 60 + date.getSeconds() + date.getMilliseconds(); |
| 1509 | if (frac == 0 || granularity >= Dygraph.DAILY) { |
| 1510 | return new Date(date.getTime() + 3600*1000).strftime('%d%b'); |
| 1511 | } else { |
| 1512 | return Dygraph.hmsString_(date.getTime()); |
| 1513 | } |
| 1514 | } |
| 1515 | } |
| 1516 | |
| 1517 | /** |
| 1518 | * Convert a JS date (millis since epoch) to YYYY/MM/DD |
| 1519 | * @param {Number} date The JavaScript date (ms since epoch) |
| 1520 | * @return {String} A date of the form "YYYY/MM/DD" |
| 1521 | * @private |
| 1522 | */ |
| 1523 | Dygraph.dateString_ = function(date, self) { |
| 1524 | var zeropad = Dygraph.zeropad; |
| 1525 | var d = new Date(date); |
| 1526 | |
| 1527 | // Get the year: |
| 1528 | var year = "" + d.getFullYear(); |
| 1529 | // Get a 0 padded month string |
| 1530 | var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh |
| 1531 | // Get a 0 padded day string |
| 1532 | var day = zeropad(d.getDate()); |
| 1533 | |
| 1534 | var ret = ""; |
| 1535 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); |
| 1536 | if (frac) ret = " " + Dygraph.hmsString_(date); |
| 1537 | |
| 1538 | return year + "/" + month + "/" + day + ret; |
| 1539 | }; |
| 1540 | |
| 1541 | /** |
| 1542 | * Round a number to the specified number of digits past the decimal point. |
| 1543 | * @param {Number} num The number to round |
| 1544 | * @param {Number} places The number of decimals to which to round |
| 1545 | * @return {Number} The rounded number |
| 1546 | * @private |
| 1547 | */ |
| 1548 | Dygraph.round_ = function(num, places) { |
| 1549 | var shift = Math.pow(10, places); |
| 1550 | return Math.round(num * shift)/shift; |
| 1551 | }; |
| 1552 | |
| 1553 | /** |
| 1554 | * Fires when there's data available to be graphed. |
| 1555 | * @param {String} data Raw CSV data to be plotted |
| 1556 | * @private |
| 1557 | */ |
| 1558 | Dygraph.prototype.loadedEvent_ = function(data) { |
| 1559 | this.rawData_ = this.parseCSV_(data); |
| 1560 | this.predraw_(); |
| 1561 | }; |
| 1562 | |
| 1563 | Dygraph.prototype.months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", |
| 1564 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]; |
| 1565 | Dygraph.prototype.quarters = ["Jan", "Apr", "Jul", "Oct"]; |
| 1566 | |
| 1567 | /** |
| 1568 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days |
| 1569 | * @private |
| 1570 | */ |
| 1571 | Dygraph.prototype.addXTicks_ = function() { |
| 1572 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
| 1573 | var startDate, endDate; |
| 1574 | if (this.dateWindow_) { |
| 1575 | startDate = this.dateWindow_[0]; |
| 1576 | endDate = this.dateWindow_[1]; |
| 1577 | } else { |
| 1578 | startDate = this.rawData_[0][0]; |
| 1579 | endDate = this.rawData_[this.rawData_.length - 1][0]; |
| 1580 | } |
| 1581 | |
| 1582 | var xTicks = this.attr_('xTicker')(startDate, endDate, this); |
| 1583 | this.layout_.updateOptions({xTicks: xTicks}); |
| 1584 | }; |
| 1585 | |
| 1586 | // Time granularity enumeration |
| 1587 | Dygraph.SECONDLY = 0; |
| 1588 | Dygraph.TWO_SECONDLY = 1; |
| 1589 | Dygraph.FIVE_SECONDLY = 2; |
| 1590 | Dygraph.TEN_SECONDLY = 3; |
| 1591 | Dygraph.THIRTY_SECONDLY = 4; |
| 1592 | Dygraph.MINUTELY = 5; |
| 1593 | Dygraph.TWO_MINUTELY = 6; |
| 1594 | Dygraph.FIVE_MINUTELY = 7; |
| 1595 | Dygraph.TEN_MINUTELY = 8; |
| 1596 | Dygraph.THIRTY_MINUTELY = 9; |
| 1597 | Dygraph.HOURLY = 10; |
| 1598 | Dygraph.TWO_HOURLY = 11; |
| 1599 | Dygraph.SIX_HOURLY = 12; |
| 1600 | Dygraph.DAILY = 13; |
| 1601 | Dygraph.WEEKLY = 14; |
| 1602 | Dygraph.MONTHLY = 15; |
| 1603 | Dygraph.QUARTERLY = 16; |
| 1604 | Dygraph.BIANNUAL = 17; |
| 1605 | Dygraph.ANNUAL = 18; |
| 1606 | Dygraph.DECADAL = 19; |
| 1607 | Dygraph.NUM_GRANULARITIES = 20; |
| 1608 | |
| 1609 | Dygraph.SHORT_SPACINGS = []; |
| 1610 | Dygraph.SHORT_SPACINGS[Dygraph.SECONDLY] = 1000 * 1; |
| 1611 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_SECONDLY] = 1000 * 2; |
| 1612 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_SECONDLY] = 1000 * 5; |
| 1613 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_SECONDLY] = 1000 * 10; |
| 1614 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_SECONDLY] = 1000 * 30; |
| 1615 | Dygraph.SHORT_SPACINGS[Dygraph.MINUTELY] = 1000 * 60; |
| 1616 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_MINUTELY] = 1000 * 60 * 2; |
| 1617 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_MINUTELY] = 1000 * 60 * 5; |
| 1618 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_MINUTELY] = 1000 * 60 * 10; |
| 1619 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_MINUTELY] = 1000 * 60 * 30; |
| 1620 | Dygraph.SHORT_SPACINGS[Dygraph.HOURLY] = 1000 * 3600; |
| 1621 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_HOURLY] = 1000 * 3600 * 2; |
| 1622 | Dygraph.SHORT_SPACINGS[Dygraph.SIX_HOURLY] = 1000 * 3600 * 6; |
| 1623 | Dygraph.SHORT_SPACINGS[Dygraph.DAILY] = 1000 * 86400; |
| 1624 | Dygraph.SHORT_SPACINGS[Dygraph.WEEKLY] = 1000 * 604800; |
| 1625 | |
| 1626 | // NumXTicks() |
| 1627 | // |
| 1628 | // If we used this time granularity, how many ticks would there be? |
| 1629 | // This is only an approximation, but it's generally good enough. |
| 1630 | // |
| 1631 | Dygraph.prototype.NumXTicks = function(start_time, end_time, granularity) { |
| 1632 | if (granularity < Dygraph.MONTHLY) { |
| 1633 | // Generate one tick mark for every fixed interval of time. |
| 1634 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
| 1635 | return Math.floor(0.5 + 1.0 * (end_time - start_time) / spacing); |
| 1636 | } else { |
| 1637 | var year_mod = 1; // e.g. to only print one point every 10 years. |
| 1638 | var num_months = 12; |
| 1639 | if (granularity == Dygraph.QUARTERLY) num_months = 3; |
| 1640 | if (granularity == Dygraph.BIANNUAL) num_months = 2; |
| 1641 | if (granularity == Dygraph.ANNUAL) num_months = 1; |
| 1642 | if (granularity == Dygraph.DECADAL) { num_months = 1; year_mod = 10; } |
| 1643 | |
| 1644 | var msInYear = 365.2524 * 24 * 3600 * 1000; |
| 1645 | var num_years = 1.0 * (end_time - start_time) / msInYear; |
| 1646 | return Math.floor(0.5 + 1.0 * num_years * num_months / year_mod); |
| 1647 | } |
| 1648 | }; |
| 1649 | |
| 1650 | // GetXAxis() |
| 1651 | // |
| 1652 | // Construct an x-axis of nicely-formatted times on meaningful boundaries |
| 1653 | // (e.g. 'Jan 09' rather than 'Jan 22, 2009'). |
| 1654 | // |
| 1655 | // Returns an array containing {v: millis, label: label} dictionaries. |
| 1656 | // |
| 1657 | Dygraph.prototype.GetXAxis = function(start_time, end_time, granularity) { |
| 1658 | var formatter = this.attr_("xAxisLabelFormatter"); |
| 1659 | var ticks = []; |
| 1660 | if (granularity < Dygraph.MONTHLY) { |
| 1661 | // Generate one tick mark for every fixed interval of time. |
| 1662 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
| 1663 | var format = '%d%b'; // e.g. "1Jan" |
| 1664 | |
| 1665 | // Find a time less than start_time which occurs on a "nice" time boundary |
| 1666 | // for this granularity. |
| 1667 | var g = spacing / 1000; |
| 1668 | var d = new Date(start_time); |
| 1669 | if (g <= 60) { // seconds |
| 1670 | var x = d.getSeconds(); d.setSeconds(x - x % g); |
| 1671 | } else { |
| 1672 | d.setSeconds(0); |
| 1673 | g /= 60; |
| 1674 | if (g <= 60) { // minutes |
| 1675 | var x = d.getMinutes(); d.setMinutes(x - x % g); |
| 1676 | } else { |
| 1677 | d.setMinutes(0); |
| 1678 | g /= 60; |
| 1679 | |
| 1680 | if (g <= 24) { // days |
| 1681 | var x = d.getHours(); d.setHours(x - x % g); |
| 1682 | } else { |
| 1683 | d.setHours(0); |
| 1684 | g /= 24; |
| 1685 | |
| 1686 | if (g == 7) { // one week |
| 1687 | d.setDate(d.getDate() - d.getDay()); |
| 1688 | } |
| 1689 | } |
| 1690 | } |
| 1691 | } |
| 1692 | start_time = d.getTime(); |
| 1693 | |
| 1694 | for (var t = start_time; t <= end_time; t += spacing) { |
| 1695 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
| 1696 | } |
| 1697 | } else { |
| 1698 | // Display a tick mark on the first of a set of months of each year. |
| 1699 | // Years get a tick mark iff y % year_mod == 0. This is useful for |
| 1700 | // displaying a tick mark once every 10 years, say, on long time scales. |
| 1701 | var months; |
| 1702 | var year_mod = 1; // e.g. to only print one point every 10 years. |
| 1703 | |
| 1704 | if (granularity == Dygraph.MONTHLY) { |
| 1705 | months = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ]; |
| 1706 | } else if (granularity == Dygraph.QUARTERLY) { |
| 1707 | months = [ 0, 3, 6, 9 ]; |
| 1708 | } else if (granularity == Dygraph.BIANNUAL) { |
| 1709 | months = [ 0, 6 ]; |
| 1710 | } else if (granularity == Dygraph.ANNUAL) { |
| 1711 | months = [ 0 ]; |
| 1712 | } else if (granularity == Dygraph.DECADAL) { |
| 1713 | months = [ 0 ]; |
| 1714 | year_mod = 10; |
| 1715 | } |
| 1716 | |
| 1717 | var start_year = new Date(start_time).getFullYear(); |
| 1718 | var end_year = new Date(end_time).getFullYear(); |
| 1719 | var zeropad = Dygraph.zeropad; |
| 1720 | for (var i = start_year; i <= end_year; i++) { |
| 1721 | if (i % year_mod != 0) continue; |
| 1722 | for (var j = 0; j < months.length; j++) { |
| 1723 | var date_str = i + "/" + zeropad(1 + months[j]) + "/01"; |
| 1724 | var t = Date.parse(date_str); |
| 1725 | if (t < start_time || t > end_time) continue; |
| 1726 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
| 1727 | } |
| 1728 | } |
| 1729 | } |
| 1730 | |
| 1731 | return ticks; |
| 1732 | }; |
| 1733 | |
| 1734 | |
| 1735 | /** |
| 1736 | * Add ticks to the x-axis based on a date range. |
| 1737 | * @param {Number} startDate Start of the date window (millis since epoch) |
| 1738 | * @param {Number} endDate End of the date window (millis since epoch) |
| 1739 | * @return {Array.<Object>} Array of {label, value} tuples. |
| 1740 | * @public |
| 1741 | */ |
| 1742 | Dygraph.dateTicker = function(startDate, endDate, self) { |
| 1743 | var chosen = -1; |
| 1744 | for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) { |
| 1745 | var num_ticks = self.NumXTicks(startDate, endDate, i); |
| 1746 | if (self.width_ / num_ticks >= self.attr_('pixelsPerXLabel')) { |
| 1747 | chosen = i; |
| 1748 | break; |
| 1749 | } |
| 1750 | } |
| 1751 | |
| 1752 | if (chosen >= 0) { |
| 1753 | return self.GetXAxis(startDate, endDate, chosen); |
| 1754 | } else { |
| 1755 | // TODO(danvk): signal error. |
| 1756 | } |
| 1757 | }; |
| 1758 | |
| 1759 | /** |
| 1760 | * Add ticks when the x axis has numbers on it (instead of dates) |
| 1761 | * @param {Number} startDate Start of the date window (millis since epoch) |
| 1762 | * @param {Number} endDate End of the date window (millis since epoch) |
| 1763 | * @param self |
| 1764 | * @param {function} attribute accessor function. |
| 1765 | * @return {Array.<Object>} Array of {label, value} tuples. |
| 1766 | * @public |
| 1767 | */ |
| 1768 | Dygraph.numericTicks = function(minV, maxV, self, axis_props, vals) { |
| 1769 | var attr = function(k) { |
| 1770 | if (axis_props && axis_props.hasOwnProperty(k)) return axis_props[k]; |
| 1771 | return self.attr_(k); |
| 1772 | }; |
| 1773 | |
| 1774 | var ticks = []; |
| 1775 | if (vals) { |
| 1776 | for (var i = 0; i < vals.length; i++) { |
| 1777 | ticks.push({v: vals[i]}); |
| 1778 | } |
| 1779 | } else { |
| 1780 | // Basic idea: |
| 1781 | // Try labels every 1, 2, 5, 10, 20, 50, 100, etc. |
| 1782 | // Calculate the resulting tick spacing (i.e. this.height_ / nTicks). |
| 1783 | // The first spacing greater than pixelsPerYLabel is what we use. |
| 1784 | // TODO(danvk): version that works on a log scale. |
| 1785 | if (attr("labelsKMG2")) { |
| 1786 | var mults = [1, 2, 4, 8]; |
| 1787 | } else { |
| 1788 | var mults = [1, 2, 5]; |
| 1789 | } |
| 1790 | var scale, low_val, high_val, nTicks; |
| 1791 | // TODO(danvk): make it possible to set this for x- and y-axes independently. |
| 1792 | var pixelsPerTick = attr('pixelsPerYLabel'); |
| 1793 | for (var i = -10; i < 50; i++) { |
| 1794 | if (attr("labelsKMG2")) { |
| 1795 | var base_scale = Math.pow(16, i); |
| 1796 | } else { |
| 1797 | var base_scale = Math.pow(10, i); |
| 1798 | } |
| 1799 | for (var j = 0; j < mults.length; j++) { |
| 1800 | scale = base_scale * mults[j]; |
| 1801 | low_val = Math.floor(minV / scale) * scale; |
| 1802 | high_val = Math.ceil(maxV / scale) * scale; |
| 1803 | nTicks = Math.abs(high_val - low_val) / scale; |
| 1804 | var spacing = self.height_ / nTicks; |
| 1805 | // wish I could break out of both loops at once... |
| 1806 | if (spacing > pixelsPerTick) break; |
| 1807 | } |
| 1808 | if (spacing > pixelsPerTick) break; |
| 1809 | } |
| 1810 | |
| 1811 | // Construct the set of ticks. |
| 1812 | // Allow reverse y-axis if it's explicitly requested. |
| 1813 | if (low_val > high_val) scale *= -1; |
| 1814 | for (var i = 0; i < nTicks; i++) { |
| 1815 | var tickV = low_val + i * scale; |
| 1816 | ticks.push( {v: tickV} ); |
| 1817 | } |
| 1818 | } |
| 1819 | |
| 1820 | // Add formatted labels to the ticks. |
| 1821 | var k; |
| 1822 | var k_labels = []; |
| 1823 | if (attr("labelsKMB")) { |
| 1824 | k = 1000; |
| 1825 | k_labels = [ "K", "M", "B", "T" ]; |
| 1826 | } |
| 1827 | if (attr("labelsKMG2")) { |
| 1828 | if (k) self.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); |
| 1829 | k = 1024; |
| 1830 | k_labels = [ "k", "M", "G", "T" ]; |
| 1831 | } |
| 1832 | var formatter = attr('yAxisLabelFormatter') ? attr('yAxisLabelFormatter') : attr('yValueFormatter'); |
| 1833 | |
| 1834 | for (var i = 0; i < ticks.length; i++) { |
| 1835 | var tickV = ticks[i].v; |
| 1836 | var absTickV = Math.abs(tickV); |
| 1837 | var label; |
| 1838 | if (formatter != undefined) { |
| 1839 | label = formatter(tickV); |
| 1840 | } else { |
| 1841 | label = Dygraph.round_(tickV, 2); |
| 1842 | } |
| 1843 | if (k_labels.length) { |
| 1844 | // Round up to an appropriate unit. |
| 1845 | var n = k*k*k*k; |
| 1846 | for (var j = 3; j >= 0; j--, n /= k) { |
| 1847 | if (absTickV >= n) { |
| 1848 | label = Dygraph.round_(tickV / n, 1) + k_labels[j]; |
| 1849 | break; |
| 1850 | } |
| 1851 | } |
| 1852 | } |
| 1853 | ticks[i].label = label; |
| 1854 | } |
| 1855 | return ticks; |
| 1856 | }; |
| 1857 | |
| 1858 | // Computes the range of the data series (including confidence intervals). |
| 1859 | // series is either [ [x1, y1], [x2, y2], ... ] or |
| 1860 | // [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... |
| 1861 | // Returns [low, high] |
| 1862 | Dygraph.prototype.extremeValues_ = function(series) { |
| 1863 | var minY = null, maxY = null; |
| 1864 | |
| 1865 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
| 1866 | if (bars) { |
| 1867 | // With custom bars, maxY is the max of the high values. |
| 1868 | for (var j = 0; j < series.length; j++) { |
| 1869 | var y = series[j][1][0]; |
| 1870 | if (!y) continue; |
| 1871 | var low = y - series[j][1][1]; |
| 1872 | var high = y + series[j][1][2]; |
| 1873 | if (low > y) low = y; // this can happen with custom bars, |
| 1874 | if (high < y) high = y; // e.g. in tests/custom-bars.html |
| 1875 | if (maxY == null || high > maxY) { |
| 1876 | maxY = high; |
| 1877 | } |
| 1878 | if (minY == null || low < minY) { |
| 1879 | minY = low; |
| 1880 | } |
| 1881 | } |
| 1882 | } else { |
| 1883 | for (var j = 0; j < series.length; j++) { |
| 1884 | var y = series[j][1]; |
| 1885 | if (y === null || isNaN(y)) continue; |
| 1886 | if (maxY == null || y > maxY) { |
| 1887 | maxY = y; |
| 1888 | } |
| 1889 | if (minY == null || y < minY) { |
| 1890 | minY = y; |
| 1891 | } |
| 1892 | } |
| 1893 | } |
| 1894 | |
| 1895 | return [minY, maxY]; |
| 1896 | }; |
| 1897 | |
| 1898 | /** |
| 1899 | * This function is called once when the chart's data is changed or the options |
| 1900 | * dictionary is updated. It is _not_ called when the user pans or zooms. The |
| 1901 | * idea is that values derived from the chart's data can be computed here, |
| 1902 | * rather than every time the chart is drawn. This includes things like the |
| 1903 | * number of axes, rolling averages, etc. |
| 1904 | */ |
| 1905 | Dygraph.prototype.predraw_ = function() { |
| 1906 | // TODO(danvk): move more computations out of drawGraph_ and into here. |
| 1907 | this.computeYAxes_(); |
| 1908 | |
| 1909 | // Create a new plotter. |
| 1910 | if (this.plotter_) this.plotter_.clear(); |
| 1911 | this.plotter_ = new DygraphCanvasRenderer(this, |
| 1912 | this.hidden_, this.layout_, |
| 1913 | this.renderOptions_); |
| 1914 | |
| 1915 | // The roller sits in the bottom left corner of the chart. We don't know where |
| 1916 | // this will be until the options are available, so it's positioned here. |
| 1917 | this.createRollInterface_(); |
| 1918 | |
| 1919 | // Same thing applies for the labelsDiv. It's right edge should be flush with |
| 1920 | // the right edge of the charting area (which may not be the same as the right |
| 1921 | // edge of the div, if we have two y-axes. |
| 1922 | this.positionLabelsDiv_(); |
| 1923 | |
| 1924 | // If the data or options have changed, then we'd better redraw. |
| 1925 | this.drawGraph_(); |
| 1926 | }; |
| 1927 | |
| 1928 | /** |
| 1929 | ======= |
| 1930 | * Update the graph with new data. This method is called when the viewing area |
| 1931 | * has changed. If the underlying data or options have changed, predraw_ will |
| 1932 | * be called before drawGraph_ is called. |
| 1933 | * @private |
| 1934 | */ |
| 1935 | Dygraph.prototype.drawGraph_ = function() { |
| 1936 | var data = this.rawData_; |
| 1937 | |
| 1938 | // This is used to set the second parameter to drawCallback, below. |
| 1939 | var is_initial_draw = this.is_initial_draw_; |
| 1940 | this.is_initial_draw_ = false; |
| 1941 | |
| 1942 | var minY = null, maxY = null; |
| 1943 | this.layout_.removeAllDatasets(); |
| 1944 | this.setColors_(); |
| 1945 | this.attrs_['pointSize'] = 0.5 * this.attr_('highlightCircleSize'); |
| 1946 | |
| 1947 | // Loop over the fields (series). Go from the last to the first, |
| 1948 | // because if they're stacked that's how we accumulate the values. |
| 1949 | |
| 1950 | var cumulative_y = []; // For stacked series. |
| 1951 | var datasets = []; |
| 1952 | |
| 1953 | var extremes = {}; // series name -> [low, high] |
| 1954 | |
| 1955 | // Loop over all fields and create datasets |
| 1956 | for (var i = data[0].length - 1; i >= 1; i--) { |
| 1957 | if (!this.visibility()[i - 1]) continue; |
| 1958 | |
| 1959 | var seriesName = this.attr_("labels")[i]; |
| 1960 | var connectSeparatedPoints = this.attr_('connectSeparatedPoints', i); |
| 1961 | |
| 1962 | var series = []; |
| 1963 | for (var j = 0; j < data.length; j++) { |
| 1964 | if (data[j][i] != null || !connectSeparatedPoints) { |
| 1965 | var date = data[j][0]; |
| 1966 | series.push([date, data[j][i]]); |
| 1967 | } |
| 1968 | } |
| 1969 | |
| 1970 | // TODO(danvk): move this into predraw_. It's insane to do it here. |
| 1971 | series = this.rollingAverage(series, this.rollPeriod_); |
| 1972 | |
| 1973 | // Prune down to the desired range, if necessary (for zooming) |
| 1974 | // Because there can be lines going to points outside of the visible area, |
| 1975 | // we actually prune to visible points, plus one on either side. |
| 1976 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
| 1977 | if (this.dateWindow_) { |
| 1978 | var low = this.dateWindow_[0]; |
| 1979 | var high= this.dateWindow_[1]; |
| 1980 | var pruned = []; |
| 1981 | // TODO(danvk): do binary search instead of linear search. |
| 1982 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. |
| 1983 | var firstIdx = null, lastIdx = null; |
| 1984 | for (var k = 0; k < series.length; k++) { |
| 1985 | if (series[k][0] >= low && firstIdx === null) { |
| 1986 | firstIdx = k; |
| 1987 | } |
| 1988 | if (series[k][0] <= high) { |
| 1989 | lastIdx = k; |
| 1990 | } |
| 1991 | } |
| 1992 | if (firstIdx === null) firstIdx = 0; |
| 1993 | if (firstIdx > 0) firstIdx--; |
| 1994 | if (lastIdx === null) lastIdx = series.length - 1; |
| 1995 | if (lastIdx < series.length - 1) lastIdx++; |
| 1996 | this.boundaryIds_[i-1] = [firstIdx, lastIdx]; |
| 1997 | for (var k = firstIdx; k <= lastIdx; k++) { |
| 1998 | pruned.push(series[k]); |
| 1999 | } |
| 2000 | series = pruned; |
| 2001 | } else { |
| 2002 | this.boundaryIds_[i-1] = [0, series.length-1]; |
| 2003 | } |
| 2004 | |
| 2005 | var seriesExtremes = this.extremeValues_(series); |
| 2006 | |
| 2007 | if (bars) { |
| 2008 | for (var j=0; j<series.length; j++) { |
| 2009 | val = [series[j][0], series[j][1][0], series[j][1][1], series[j][1][2]]; |
| 2010 | series[j] = val; |
| 2011 | } |
| 2012 | } else if (this.attr_("stackedGraph")) { |
| 2013 | var l = series.length; |
| 2014 | var actual_y; |
| 2015 | for (var j = 0; j < l; j++) { |
| 2016 | // If one data set has a NaN, let all subsequent stacked |
| 2017 | // sets inherit the NaN -- only start at 0 for the first set. |
| 2018 | var x = series[j][0]; |
| 2019 | if (cumulative_y[x] === undefined) { |
| 2020 | cumulative_y[x] = 0; |
| 2021 | } |
| 2022 | |
| 2023 | actual_y = series[j][1]; |
| 2024 | cumulative_y[x] += actual_y; |
| 2025 | |
| 2026 | series[j] = [x, cumulative_y[x]] |
| 2027 | |
| 2028 | if (cumulative_y[x] > seriesExtremes[1]) { |
| 2029 | seriesExtremes[1] = cumulative_y[x]; |
| 2030 | } |
| 2031 | if (cumulative_y[x] < seriesExtremes[0]) { |
| 2032 | seriesExtremes[0] = cumulative_y[x]; |
| 2033 | } |
| 2034 | } |
| 2035 | } |
| 2036 | extremes[seriesName] = seriesExtremes; |
| 2037 | |
| 2038 | datasets[i] = series; |
| 2039 | } |
| 2040 | |
| 2041 | for (var i = 1; i < datasets.length; i++) { |
| 2042 | if (!this.visibility()[i - 1]) continue; |
| 2043 | this.layout_.addDataset(this.attr_("labels")[i], datasets[i]); |
| 2044 | } |
| 2045 | |
| 2046 | // TODO(danvk): this method doesn't need to return anything. |
| 2047 | var out = this.computeYAxisRanges_(extremes); |
| 2048 | var axes = out[0]; |
| 2049 | var seriesToAxisMap = out[1]; |
| 2050 | this.layout_.updateOptions( { yAxes: axes, |
| 2051 | seriesToAxisMap: seriesToAxisMap |
| 2052 | } ); |
| 2053 | |
| 2054 | this.addXTicks_(); |
| 2055 | |
| 2056 | // Tell PlotKit to use this new data and render itself |
| 2057 | this.layout_.updateOptions({dateWindow: this.dateWindow_}); |
| 2058 | this.layout_.evaluateWithError(); |
| 2059 | this.plotter_.clear(); |
| 2060 | this.plotter_.render(); |
| 2061 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
| 2062 | this.canvas_.height); |
| 2063 | |
| 2064 | if (this.attr_("drawCallback") !== null) { |
| 2065 | this.attr_("drawCallback")(this, is_initial_draw); |
| 2066 | } |
| 2067 | }; |
| 2068 | |
| 2069 | /** |
| 2070 | * Determine properties of the y-axes which are independent of the data |
| 2071 | * currently being displayed. This includes things like the number of axes and |
| 2072 | * the style of the axes. It does not include the range of each axis and its |
| 2073 | * tick marks. |
| 2074 | * This fills in this.axes_ and this.seriesToAxisMap_. |
| 2075 | * axes_ = [ { options } ] |
| 2076 | * seriesToAxisMap_ = { seriesName: 0, seriesName2: 1, ... } |
| 2077 | * indices are into the axes_ array. |
| 2078 | */ |
| 2079 | Dygraph.prototype.computeYAxes_ = function() { |
| 2080 | this.axes_ = [{}]; // always have at least one y-axis. |
| 2081 | this.seriesToAxisMap_ = {}; |
| 2082 | |
| 2083 | // Get a list of series names. |
| 2084 | var labels = this.attr_("labels"); |
| 2085 | var series = {}; |
| 2086 | for (var i = 1; i < labels.length; i++) series[labels[i]] = (i - 1); |
| 2087 | |
| 2088 | // all options which could be applied per-axis: |
| 2089 | var axisOptions = [ |
| 2090 | 'includeZero', |
| 2091 | 'valueRange', |
| 2092 | 'labelsKMB', |
| 2093 | 'labelsKMG2', |
| 2094 | 'pixelsPerYLabel', |
| 2095 | 'yAxisLabelWidth', |
| 2096 | 'axisLabelFontSize', |
| 2097 | 'axisTickSize' |
| 2098 | ]; |
| 2099 | |
| 2100 | // Copy global axis options over to the first axis. |
| 2101 | for (var i = 0; i < axisOptions.length; i++) { |
| 2102 | var k = axisOptions[i]; |
| 2103 | var v = this.attr_(k); |
| 2104 | if (v) this.axes_[0][k] = v; |
| 2105 | } |
| 2106 | |
| 2107 | // Go through once and add all the axes. |
| 2108 | for (var seriesName in series) { |
| 2109 | if (!series.hasOwnProperty(seriesName)) continue; |
| 2110 | var axis = this.attr_("axis", seriesName); |
| 2111 | if (axis == null) { |
| 2112 | this.seriesToAxisMap_[seriesName] = 0; |
| 2113 | continue; |
| 2114 | } |
| 2115 | if (typeof(axis) == 'object') { |
| 2116 | // Add a new axis, making a copy of its per-axis options. |
| 2117 | var opts = {}; |
| 2118 | Dygraph.update(opts, this.axes_[0]); |
| 2119 | Dygraph.update(opts, { valueRange: null }); // shouldn't inherit this. |
| 2120 | Dygraph.update(opts, axis); |
| 2121 | this.axes_.push(opts); |
| 2122 | this.seriesToAxisMap_[seriesName] = this.axes_.length - 1; |
| 2123 | } |
| 2124 | } |
| 2125 | |
| 2126 | // Go through one more time and assign series to an axis defined by another |
| 2127 | // series, e.g. { 'Y1: { axis: {} }, 'Y2': { axis: 'Y1' } } |
| 2128 | for (var seriesName in series) { |
| 2129 | if (!series.hasOwnProperty(seriesName)) continue; |
| 2130 | var axis = this.attr_("axis", seriesName); |
| 2131 | if (typeof(axis) == 'string') { |
| 2132 | if (!this.seriesToAxisMap_.hasOwnProperty(axis)) { |
| 2133 | this.error("Series " + seriesName + " wants to share a y-axis with " + |
| 2134 | "series " + axis + ", which does not define its own axis."); |
| 2135 | return null; |
| 2136 | } |
| 2137 | var idx = this.seriesToAxisMap_[axis]; |
| 2138 | this.seriesToAxisMap_[seriesName] = idx; |
| 2139 | } |
| 2140 | } |
| 2141 | |
| 2142 | // Now we remove series from seriesToAxisMap_ which are not visible. We do |
| 2143 | // this last so that hiding the first series doesn't destroy the axis |
| 2144 | // properties of the primary axis. |
| 2145 | var seriesToAxisFiltered = {}; |
| 2146 | var vis = this.visibility(); |
| 2147 | for (var i = 1; i < labels.length; i++) { |
| 2148 | var s = labels[i]; |
| 2149 | if (vis[i - 1]) seriesToAxisFiltered[s] = this.seriesToAxisMap_[s]; |
| 2150 | } |
| 2151 | this.seriesToAxisMap_ = seriesToAxisFiltered; |
| 2152 | }; |
| 2153 | |
| 2154 | /** |
| 2155 | * Returns the number of y-axes on the chart. |
| 2156 | * @return {Number} the number of axes. |
| 2157 | */ |
| 2158 | Dygraph.prototype.numAxes = function() { |
| 2159 | var last_axis = 0; |
| 2160 | for (var series in this.seriesToAxisMap_) { |
| 2161 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; |
| 2162 | var idx = this.seriesToAxisMap_[series]; |
| 2163 | if (idx > last_axis) last_axis = idx; |
| 2164 | } |
| 2165 | return 1 + last_axis; |
| 2166 | }; |
| 2167 | |
| 2168 | /** |
| 2169 | * Determine the value range and tick marks for each axis. |
| 2170 | * @param {Object} extremes A mapping from seriesName -> [low, high] |
| 2171 | * This fills in the valueRange and ticks fields in each entry of this.axes_. |
| 2172 | */ |
| 2173 | Dygraph.prototype.computeYAxisRanges_ = function(extremes) { |
| 2174 | // Build a map from axis number -> [list of series names] |
| 2175 | var seriesForAxis = []; |
| 2176 | for (var series in this.seriesToAxisMap_) { |
| 2177 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; |
| 2178 | var idx = this.seriesToAxisMap_[series]; |
| 2179 | while (seriesForAxis.length <= idx) seriesForAxis.push([]); |
| 2180 | seriesForAxis[idx].push(series); |
| 2181 | } |
| 2182 | |
| 2183 | // Compute extreme values, a span and tick marks for each axis. |
| 2184 | for (var i = 0; i < this.axes_.length; i++) { |
| 2185 | var axis = this.axes_[i]; |
| 2186 | if (axis.valueWindow) { |
| 2187 | // This is only set if the user has zoomed on the y-axis. It is never set |
| 2188 | // by a user. It takes precedence over axis.valueRange because, if you set |
| 2189 | // valueRange, you'd still expect to be able to pan. |
| 2190 | axis.computedValueRange = [axis.valueWindow[0], axis.valueWindow[1]]; |
| 2191 | } else if (axis.valueRange) { |
| 2192 | // This is a user-set value range for this axis. |
| 2193 | axis.computedValueRange = [axis.valueRange[0], axis.valueRange[1]]; |
| 2194 | } else { |
| 2195 | // Calculate the extremes of extremes. |
| 2196 | var series = seriesForAxis[i]; |
| 2197 | var minY = Infinity; // extremes[series[0]][0]; |
| 2198 | var maxY = -Infinity; // extremes[series[0]][1]; |
| 2199 | for (var j = 0; j < series.length; j++) { |
| 2200 | minY = Math.min(extremes[series[j]][0], minY); |
| 2201 | maxY = Math.max(extremes[series[j]][1], maxY); |
| 2202 | } |
| 2203 | if (axis.includeZero && minY > 0) minY = 0; |
| 2204 | |
| 2205 | // Add some padding and round up to an integer to be human-friendly. |
| 2206 | var span = maxY - minY; |
| 2207 | // special case: if we have no sense of scale, use +/-10% of the sole value. |
| 2208 | if (span == 0) { span = maxY; } |
| 2209 | var maxAxisY = maxY + 0.1 * span; |
| 2210 | var minAxisY = minY - 0.1 * span; |
| 2211 | |
| 2212 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. |
| 2213 | if (!this.attr_("avoidMinZero")) { |
| 2214 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; |
| 2215 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; |
| 2216 | } |
| 2217 | |
| 2218 | if (this.attr_("includeZero")) { |
| 2219 | if (maxY < 0) maxAxisY = 0; |
| 2220 | if (minY > 0) minAxisY = 0; |
| 2221 | } |
| 2222 | |
| 2223 | axis.computedValueRange = [minAxisY, maxAxisY]; |
| 2224 | } |
| 2225 | |
| 2226 | // Add ticks. By default, all axes inherit the tick positions of the |
| 2227 | // primary axis. However, if an axis is specifically marked as having |
| 2228 | // independent ticks, then that is permissible as well. |
| 2229 | if (i == 0 || axis.independentTicks) { |
| 2230 | axis.ticks = |
| 2231 | Dygraph.numericTicks(axis.computedValueRange[0], |
| 2232 | axis.computedValueRange[1], |
| 2233 | this, |
| 2234 | axis); |
| 2235 | } else { |
| 2236 | var p_axis = this.axes_[0]; |
| 2237 | var p_ticks = p_axis.ticks; |
| 2238 | var p_scale = p_axis.computedValueRange[1] - p_axis.computedValueRange[0]; |
| 2239 | var scale = axis.computedValueRange[1] - axis.computedValueRange[0]; |
| 2240 | var tick_values = []; |
| 2241 | for (var i = 0; i < p_ticks.length; i++) { |
| 2242 | var y_frac = (p_ticks[i].v - p_axis.computedValueRange[0]) / p_scale; |
| 2243 | var y_val = axis.computedValueRange[0] + y_frac * scale; |
| 2244 | tick_values.push(y_val); |
| 2245 | } |
| 2246 | |
| 2247 | axis.ticks = |
| 2248 | Dygraph.numericTicks(axis.computedValueRange[0], |
| 2249 | axis.computedValueRange[1], |
| 2250 | this, axis, tick_values); |
| 2251 | } |
| 2252 | } |
| 2253 | |
| 2254 | return [this.axes_, this.seriesToAxisMap_]; |
| 2255 | }; |
| 2256 | |
| 2257 | /** |
| 2258 | * Calculates the rolling average of a data set. |
| 2259 | * If originalData is [label, val], rolls the average of those. |
| 2260 | * If originalData is [label, [, it's interpreted as [value, stddev] |
| 2261 | * and the roll is returned in the same form, with appropriately reduced |
| 2262 | * stddev for each value. |
| 2263 | * Note that this is where fractional input (i.e. '5/10') is converted into |
| 2264 | * decimal values. |
| 2265 | * @param {Array} originalData The data in the appropriate format (see above) |
| 2266 | * @param {Number} rollPeriod The number of days over which to average the data |
| 2267 | */ |
| 2268 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
| 2269 | if (originalData.length < 2) |
| 2270 | return originalData; |
| 2271 | var rollPeriod = Math.min(rollPeriod, originalData.length - 1); |
| 2272 | var rollingData = []; |
| 2273 | var sigma = this.attr_("sigma"); |
| 2274 | |
| 2275 | if (this.fractions_) { |
| 2276 | var num = 0; |
| 2277 | var den = 0; // numerator/denominator |
| 2278 | var mult = 100.0; |
| 2279 | for (var i = 0; i < originalData.length; i++) { |
| 2280 | num += originalData[i][1][0]; |
| 2281 | den += originalData[i][1][1]; |
| 2282 | if (i - rollPeriod >= 0) { |
| 2283 | num -= originalData[i - rollPeriod][1][0]; |
| 2284 | den -= originalData[i - rollPeriod][1][1]; |
| 2285 | } |
| 2286 | |
| 2287 | var date = originalData[i][0]; |
| 2288 | var value = den ? num / den : 0.0; |
| 2289 | if (this.attr_("errorBars")) { |
| 2290 | if (this.wilsonInterval_) { |
| 2291 | // For more details on this confidence interval, see: |
| 2292 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval |
| 2293 | if (den) { |
| 2294 | var p = value < 0 ? 0 : value, n = den; |
| 2295 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); |
| 2296 | var denom = 1 + sigma * sigma / den; |
| 2297 | var low = (p + sigma * sigma / (2 * den) - pm) / denom; |
| 2298 | var high = (p + sigma * sigma / (2 * den) + pm) / denom; |
| 2299 | rollingData[i] = [date, |
| 2300 | [p * mult, (p - low) * mult, (high - p) * mult]]; |
| 2301 | } else { |
| 2302 | rollingData[i] = [date, [0, 0, 0]]; |
| 2303 | } |
| 2304 | } else { |
| 2305 | var stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; |
| 2306 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; |
| 2307 | } |
| 2308 | } else { |
| 2309 | rollingData[i] = [date, mult * value]; |
| 2310 | } |
| 2311 | } |
| 2312 | } else if (this.attr_("customBars")) { |
| 2313 | var low = 0; |
| 2314 | var mid = 0; |
| 2315 | var high = 0; |
| 2316 | var count = 0; |
| 2317 | for (var i = 0; i < originalData.length; i++) { |
| 2318 | var data = originalData[i][1]; |
| 2319 | var y = data[1]; |
| 2320 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; |
| 2321 | |
| 2322 | if (y != null && !isNaN(y)) { |
| 2323 | low += data[0]; |
| 2324 | mid += y; |
| 2325 | high += data[2]; |
| 2326 | count += 1; |
| 2327 | } |
| 2328 | if (i - rollPeriod >= 0) { |
| 2329 | var prev = originalData[i - rollPeriod]; |
| 2330 | if (prev[1][1] != null && !isNaN(prev[1][1])) { |
| 2331 | low -= prev[1][0]; |
| 2332 | mid -= prev[1][1]; |
| 2333 | high -= prev[1][2]; |
| 2334 | count -= 1; |
| 2335 | } |
| 2336 | } |
| 2337 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, |
| 2338 | 1.0 * (mid - low) / count, |
| 2339 | 1.0 * (high - mid) / count ]]; |
| 2340 | } |
| 2341 | } else { |
| 2342 | // Calculate the rolling average for the first rollPeriod - 1 points where |
| 2343 | // there is not enough data to roll over the full number of days |
| 2344 | var num_init_points = Math.min(rollPeriod - 1, originalData.length - 2); |
| 2345 | if (!this.attr_("errorBars")){ |
| 2346 | if (rollPeriod == 1) { |
| 2347 | return originalData; |
| 2348 | } |
| 2349 | |
| 2350 | for (var i = 0; i < originalData.length; i++) { |
| 2351 | var sum = 0; |
| 2352 | var num_ok = 0; |
| 2353 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
| 2354 | var y = originalData[j][1]; |
| 2355 | if (y == null || isNaN(y)) continue; |
| 2356 | num_ok++; |
| 2357 | sum += originalData[j][1]; |
| 2358 | } |
| 2359 | if (num_ok) { |
| 2360 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
| 2361 | } else { |
| 2362 | rollingData[i] = [originalData[i][0], null]; |
| 2363 | } |
| 2364 | } |
| 2365 | |
| 2366 | } else { |
| 2367 | for (var i = 0; i < originalData.length; i++) { |
| 2368 | var sum = 0; |
| 2369 | var variance = 0; |
| 2370 | var num_ok = 0; |
| 2371 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
| 2372 | var y = originalData[j][1][0]; |
| 2373 | if (y == null || isNaN(y)) continue; |
| 2374 | num_ok++; |
| 2375 | sum += originalData[j][1][0]; |
| 2376 | variance += Math.pow(originalData[j][1][1], 2); |
| 2377 | } |
| 2378 | if (num_ok) { |
| 2379 | var stddev = Math.sqrt(variance) / num_ok; |
| 2380 | rollingData[i] = [originalData[i][0], |
| 2381 | [sum / num_ok, sigma * stddev, sigma * stddev]]; |
| 2382 | } else { |
| 2383 | rollingData[i] = [originalData[i][0], [null, null, null]]; |
| 2384 | } |
| 2385 | } |
| 2386 | } |
| 2387 | } |
| 2388 | |
| 2389 | return rollingData; |
| 2390 | }; |
| 2391 | |
| 2392 | /** |
| 2393 | * Parses a date, returning the number of milliseconds since epoch. This can be |
| 2394 | * passed in as an xValueParser in the Dygraph constructor. |
| 2395 | * TODO(danvk): enumerate formats that this understands. |
| 2396 | * @param {String} A date in YYYYMMDD format. |
| 2397 | * @return {Number} Milliseconds since epoch. |
| 2398 | * @public |
| 2399 | */ |
| 2400 | Dygraph.dateParser = function(dateStr, self) { |
| 2401 | var dateStrSlashed; |
| 2402 | var d; |
| 2403 | if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12' |
| 2404 | dateStrSlashed = dateStr.replace("-", "/", "g"); |
| 2405 | while (dateStrSlashed.search("-") != -1) { |
| 2406 | dateStrSlashed = dateStrSlashed.replace("-", "/"); |
| 2407 | } |
| 2408 | d = Date.parse(dateStrSlashed); |
| 2409 | } else if (dateStr.length == 8) { // e.g. '20090712' |
| 2410 | // TODO(danvk): remove support for this format. It's confusing. |
| 2411 | dateStrSlashed = dateStr.substr(0,4) + "/" + dateStr.substr(4,2) |
| 2412 | + "/" + dateStr.substr(6,2); |
| 2413 | d = Date.parse(dateStrSlashed); |
| 2414 | } else { |
| 2415 | // Any format that Date.parse will accept, e.g. "2009/07/12" or |
| 2416 | // "2009/07/12 12:34:56" |
| 2417 | d = Date.parse(dateStr); |
| 2418 | } |
| 2419 | |
| 2420 | if (!d || isNaN(d)) { |
| 2421 | self.error("Couldn't parse " + dateStr + " as a date"); |
| 2422 | } |
| 2423 | return d; |
| 2424 | }; |
| 2425 | |
| 2426 | /** |
| 2427 | * Detects the type of the str (date or numeric) and sets the various |
| 2428 | * formatting attributes in this.attrs_ based on this type. |
| 2429 | * @param {String} str An x value. |
| 2430 | * @private |
| 2431 | */ |
| 2432 | Dygraph.prototype.detectTypeFromString_ = function(str) { |
| 2433 | var isDate = false; |
| 2434 | if (str.indexOf('-') >= 0 || |
| 2435 | str.indexOf('/') >= 0 || |
| 2436 | isNaN(parseFloat(str))) { |
| 2437 | isDate = true; |
| 2438 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { |
| 2439 | // TODO(danvk): remove support for this format. |
| 2440 | isDate = true; |
| 2441 | } |
| 2442 | |
| 2443 | if (isDate) { |
| 2444 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
| 2445 | this.attrs_.xValueParser = Dygraph.dateParser; |
| 2446 | this.attrs_.xTicker = Dygraph.dateTicker; |
| 2447 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
| 2448 | } else { |
| 2449 | this.attrs_.xValueFormatter = function(x) { return x; }; |
| 2450 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
| 2451 | this.attrs_.xTicker = Dygraph.numericTicks; |
| 2452 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
| 2453 | } |
| 2454 | }; |
| 2455 | |
| 2456 | /** |
| 2457 | * Parses a string in a special csv format. We expect a csv file where each |
| 2458 | * line is a date point, and the first field in each line is the date string. |
| 2459 | * We also expect that all remaining fields represent series. |
| 2460 | * if the errorBars attribute is set, then interpret the fields as: |
| 2461 | * date, series1, stddev1, series2, stddev2, ... |
| 2462 | * @param {Array.<Object>} data See above. |
| 2463 | * @private |
| 2464 | * |
| 2465 | * @return Array.<Object> An array with one entry for each row. These entries |
| 2466 | * are an array of cells in that row. The first entry is the parsed x-value for |
| 2467 | * the row. The second, third, etc. are the y-values. These can take on one of |
| 2468 | * three forms, depending on the CSV and constructor parameters: |
| 2469 | * 1. numeric value |
| 2470 | * 2. [ value, stddev ] |
| 2471 | * 3. [ low value, center value, high value ] |
| 2472 | */ |
| 2473 | Dygraph.prototype.parseCSV_ = function(data) { |
| 2474 | var ret = []; |
| 2475 | var lines = data.split("\n"); |
| 2476 | |
| 2477 | // Use the default delimiter or fall back to a tab if that makes sense. |
| 2478 | var delim = this.attr_('delimiter'); |
| 2479 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { |
| 2480 | delim = '\t'; |
| 2481 | } |
| 2482 | |
| 2483 | var start = 0; |
| 2484 | if (this.labelsFromCSV_) { |
| 2485 | start = 1; |
| 2486 | this.attrs_.labels = lines[0].split(delim); |
| 2487 | } |
| 2488 | |
| 2489 | // Parse the x as a float or return null if it's not a number. |
| 2490 | var parseFloatOrNull = function(x) { |
| 2491 | var val = parseFloat(x); |
| 2492 | // isFinite() returns false for NaN and +/-Infinity. |
| 2493 | return isFinite(val) ? val : null; |
| 2494 | }; |
| 2495 | |
| 2496 | var xParser; |
| 2497 | var defaultParserSet = false; // attempt to auto-detect x value type |
| 2498 | var expectedCols = this.attr_("labels").length; |
| 2499 | var outOfOrder = false; |
| 2500 | for (var i = start; i < lines.length; i++) { |
| 2501 | var line = lines[i]; |
| 2502 | if (line.length == 0) continue; // skip blank lines |
| 2503 | if (line[0] == '#') continue; // skip comment lines |
| 2504 | var inFields = line.split(delim); |
| 2505 | if (inFields.length < 2) continue; |
| 2506 | |
| 2507 | var fields = []; |
| 2508 | if (!defaultParserSet) { |
| 2509 | this.detectTypeFromString_(inFields[0]); |
| 2510 | xParser = this.attr_("xValueParser"); |
| 2511 | defaultParserSet = true; |
| 2512 | } |
| 2513 | fields[0] = xParser(inFields[0], this); |
| 2514 | |
| 2515 | // If fractions are expected, parse the numbers as "A/B" |
| 2516 | if (this.fractions_) { |
| 2517 | for (var j = 1; j < inFields.length; j++) { |
| 2518 | // TODO(danvk): figure out an appropriate way to flag parse errors. |
| 2519 | var vals = inFields[j].split("/"); |
| 2520 | fields[j] = [parseFloatOrNull(vals[0]), parseFloatOrNull(vals[1])]; |
| 2521 | } |
| 2522 | } else if (this.attr_("errorBars")) { |
| 2523 | // If there are error bars, values are (value, stddev) pairs |
| 2524 | for (var j = 1; j < inFields.length; j += 2) |
| 2525 | fields[(j + 1) / 2] = [parseFloatOrNull(inFields[j]), |
| 2526 | parseFloatOrNull(inFields[j + 1])]; |
| 2527 | } else if (this.attr_("customBars")) { |
| 2528 | // Bars are a low;center;high tuple |
| 2529 | for (var j = 1; j < inFields.length; j++) { |
| 2530 | var vals = inFields[j].split(";"); |
| 2531 | fields[j] = [ parseFloatOrNull(vals[0]), |
| 2532 | parseFloatOrNull(vals[1]), |
| 2533 | parseFloatOrNull(vals[2]) ]; |
| 2534 | } |
| 2535 | } else { |
| 2536 | // Values are just numbers |
| 2537 | for (var j = 1; j < inFields.length; j++) { |
| 2538 | fields[j] = parseFloatOrNull(inFields[j]); |
| 2539 | } |
| 2540 | } |
| 2541 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
| 2542 | outOfOrder = true; |
| 2543 | } |
| 2544 | ret.push(fields); |
| 2545 | |
| 2546 | if (fields.length != expectedCols) { |
| 2547 | this.error("Number of columns in line " + i + " (" + fields.length + |
| 2548 | ") does not agree with number of labels (" + expectedCols + |
| 2549 | ") " + line); |
| 2550 | } |
| 2551 | } |
| 2552 | |
| 2553 | if (outOfOrder) { |
| 2554 | this.warn("CSV is out of order; order it correctly to speed loading."); |
| 2555 | ret.sort(function(a,b) { return a[0] - b[0] }); |
| 2556 | } |
| 2557 | |
| 2558 | return ret; |
| 2559 | }; |
| 2560 | |
| 2561 | /** |
| 2562 | * The user has provided their data as a pre-packaged JS array. If the x values |
| 2563 | * are numeric, this is the same as dygraphs' internal format. If the x values |
| 2564 | * are dates, we need to convert them from Date objects to ms since epoch. |
| 2565 | * @param {Array.<Object>} data |
| 2566 | * @return {Array.<Object>} data with numeric x values. |
| 2567 | */ |
| 2568 | Dygraph.prototype.parseArray_ = function(data) { |
| 2569 | // Peek at the first x value to see if it's numeric. |
| 2570 | if (data.length == 0) { |
| 2571 | this.error("Can't plot empty data set"); |
| 2572 | return null; |
| 2573 | } |
| 2574 | if (data[0].length == 0) { |
| 2575 | this.error("Data set cannot contain an empty row"); |
| 2576 | return null; |
| 2577 | } |
| 2578 | |
| 2579 | if (this.attr_("labels") == null) { |
| 2580 | this.warn("Using default labels. Set labels explicitly via 'labels' " + |
| 2581 | "in the options parameter"); |
| 2582 | this.attrs_.labels = [ "X" ]; |
| 2583 | for (var i = 1; i < data[0].length; i++) { |
| 2584 | this.attrs_.labels.push("Y" + i); |
| 2585 | } |
| 2586 | } |
| 2587 | |
| 2588 | if (Dygraph.isDateLike(data[0][0])) { |
| 2589 | // Some intelligent defaults for a date x-axis. |
| 2590 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
| 2591 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
| 2592 | this.attrs_.xTicker = Dygraph.dateTicker; |
| 2593 | |
| 2594 | // Assume they're all dates. |
| 2595 | var parsedData = Dygraph.clone(data); |
| 2596 | for (var i = 0; i < data.length; i++) { |
| 2597 | if (parsedData[i].length == 0) { |
| 2598 | this.error("Row " + (1 + i) + " of data is empty"); |
| 2599 | return null; |
| 2600 | } |
| 2601 | if (parsedData[i][0] == null |
| 2602 | || typeof(parsedData[i][0].getTime) != 'function' |
| 2603 | || isNaN(parsedData[i][0].getTime())) { |
| 2604 | this.error("x value in row " + (1 + i) + " is not a Date"); |
| 2605 | return null; |
| 2606 | } |
| 2607 | parsedData[i][0] = parsedData[i][0].getTime(); |
| 2608 | } |
| 2609 | return parsedData; |
| 2610 | } else { |
| 2611 | // Some intelligent defaults for a numeric x-axis. |
| 2612 | this.attrs_.xValueFormatter = function(x) { return x; }; |
| 2613 | this.attrs_.xTicker = Dygraph.numericTicks; |
| 2614 | return data; |
| 2615 | } |
| 2616 | }; |
| 2617 | |
| 2618 | /** |
| 2619 | * Parses a DataTable object from gviz. |
| 2620 | * The data is expected to have a first column that is either a date or a |
| 2621 | * number. All subsequent columns must be numbers. If there is a clear mismatch |
| 2622 | * between this.xValueParser_ and the type of the first column, it will be |
| 2623 | * fixed. Fills out rawData_. |
| 2624 | * @param {Array.<Object>} data See above. |
| 2625 | * @private |
| 2626 | */ |
| 2627 | Dygraph.prototype.parseDataTable_ = function(data) { |
| 2628 | var cols = data.getNumberOfColumns(); |
| 2629 | var rows = data.getNumberOfRows(); |
| 2630 | |
| 2631 | var indepType = data.getColumnType(0); |
| 2632 | if (indepType == 'date' || indepType == 'datetime') { |
| 2633 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
| 2634 | this.attrs_.xValueParser = Dygraph.dateParser; |
| 2635 | this.attrs_.xTicker = Dygraph.dateTicker; |
| 2636 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
| 2637 | } else if (indepType == 'number') { |
| 2638 | this.attrs_.xValueFormatter = function(x) { return x; }; |
| 2639 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
| 2640 | this.attrs_.xTicker = Dygraph.numericTicks; |
| 2641 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
| 2642 | } else { |
| 2643 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
| 2644 | "column 1 of DataTable input (Got '" + indepType + "')"); |
| 2645 | return null; |
| 2646 | } |
| 2647 | |
| 2648 | // Array of the column indices which contain data (and not annotations). |
| 2649 | var colIdx = []; |
| 2650 | var annotationCols = {}; // data index -> [annotation cols] |
| 2651 | var hasAnnotations = false; |
| 2652 | for (var i = 1; i < cols; i++) { |
| 2653 | var type = data.getColumnType(i); |
| 2654 | if (type == 'number') { |
| 2655 | colIdx.push(i); |
| 2656 | } else if (type == 'string' && this.attr_('displayAnnotations')) { |
| 2657 | // This is OK -- it's an annotation column. |
| 2658 | var dataIdx = colIdx[colIdx.length - 1]; |
| 2659 | if (!annotationCols.hasOwnProperty(dataIdx)) { |
| 2660 | annotationCols[dataIdx] = [i]; |
| 2661 | } else { |
| 2662 | annotationCols[dataIdx].push(i); |
| 2663 | } |
| 2664 | hasAnnotations = true; |
| 2665 | } else { |
| 2666 | this.error("Only 'number' is supported as a dependent type with Gviz." + |
| 2667 | " 'string' is only supported if displayAnnotations is true"); |
| 2668 | } |
| 2669 | } |
| 2670 | |
| 2671 | // Read column labels |
| 2672 | // TODO(danvk): add support back for errorBars |
| 2673 | var labels = [data.getColumnLabel(0)]; |
| 2674 | for (var i = 0; i < colIdx.length; i++) { |
| 2675 | labels.push(data.getColumnLabel(colIdx[i])); |
| 2676 | if (this.attr_("errorBars")) i += 1; |
| 2677 | } |
| 2678 | this.attrs_.labels = labels; |
| 2679 | cols = labels.length; |
| 2680 | |
| 2681 | var ret = []; |
| 2682 | var outOfOrder = false; |
| 2683 | var annotations = []; |
| 2684 | for (var i = 0; i < rows; i++) { |
| 2685 | var row = []; |
| 2686 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
| 2687 | data.getValue(i, 0) === null) { |
| 2688 | this.warn("Ignoring row " + i + |
| 2689 | " of DataTable because of undefined or null first column."); |
| 2690 | continue; |
| 2691 | } |
| 2692 | |
| 2693 | if (indepType == 'date' || indepType == 'datetime') { |
| 2694 | row.push(data.getValue(i, 0).getTime()); |
| 2695 | } else { |
| 2696 | row.push(data.getValue(i, 0)); |
| 2697 | } |
| 2698 | if (!this.attr_("errorBars")) { |
| 2699 | for (var j = 0; j < colIdx.length; j++) { |
| 2700 | var col = colIdx[j]; |
| 2701 | row.push(data.getValue(i, col)); |
| 2702 | if (hasAnnotations && |
| 2703 | annotationCols.hasOwnProperty(col) && |
| 2704 | data.getValue(i, annotationCols[col][0]) != null) { |
| 2705 | var ann = {}; |
| 2706 | ann.series = data.getColumnLabel(col); |
| 2707 | ann.xval = row[0]; |
| 2708 | ann.shortText = String.fromCharCode(65 /* A */ + annotations.length) |
| 2709 | ann.text = ''; |
| 2710 | for (var k = 0; k < annotationCols[col].length; k++) { |
| 2711 | if (k) ann.text += "\n"; |
| 2712 | ann.text += data.getValue(i, annotationCols[col][k]); |
| 2713 | } |
| 2714 | annotations.push(ann); |
| 2715 | } |
| 2716 | } |
| 2717 | } else { |
| 2718 | for (var j = 0; j < cols - 1; j++) { |
| 2719 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); |
| 2720 | } |
| 2721 | } |
| 2722 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
| 2723 | outOfOrder = true; |
| 2724 | } |
| 2725 | |
| 2726 | // Strip out infinities, which give dygraphs problems later on. |
| 2727 | for (var j = 0; j < row.length; j++) { |
| 2728 | if (!isFinite(row[j])) row[j] = null; |
| 2729 | } |
| 2730 | ret.push(row); |
| 2731 | } |
| 2732 | |
| 2733 | if (outOfOrder) { |
| 2734 | this.warn("DataTable is out of order; order it correctly to speed loading."); |
| 2735 | ret.sort(function(a,b) { return a[0] - b[0] }); |
| 2736 | } |
| 2737 | this.rawData_ = ret; |
| 2738 | |
| 2739 | if (annotations.length > 0) { |
| 2740 | this.setAnnotations(annotations, true); |
| 2741 | } |
| 2742 | } |
| 2743 | |
| 2744 | // These functions are all based on MochiKit. |
| 2745 | Dygraph.update = function (self, o) { |
| 2746 | if (typeof(o) != 'undefined' && o !== null) { |
| 2747 | for (var k in o) { |
| 2748 | if (o.hasOwnProperty(k)) { |
| 2749 | self[k] = o[k]; |
| 2750 | } |
| 2751 | } |
| 2752 | } |
| 2753 | return self; |
| 2754 | }; |
| 2755 | |
| 2756 | Dygraph.isArrayLike = function (o) { |
| 2757 | var typ = typeof(o); |
| 2758 | if ( |
| 2759 | (typ != 'object' && !(typ == 'function' && |
| 2760 | typeof(o.item) == 'function')) || |
| 2761 | o === null || |
| 2762 | typeof(o.length) != 'number' || |
| 2763 | o.nodeType === 3 |
| 2764 | ) { |
| 2765 | return false; |
| 2766 | } |
| 2767 | return true; |
| 2768 | }; |
| 2769 | |
| 2770 | Dygraph.isDateLike = function (o) { |
| 2771 | if (typeof(o) != "object" || o === null || |
| 2772 | typeof(o.getTime) != 'function') { |
| 2773 | return false; |
| 2774 | } |
| 2775 | return true; |
| 2776 | }; |
| 2777 | |
| 2778 | Dygraph.clone = function(o) { |
| 2779 | // TODO(danvk): figure out how MochiKit's version works |
| 2780 | var r = []; |
| 2781 | for (var i = 0; i < o.length; i++) { |
| 2782 | if (Dygraph.isArrayLike(o[i])) { |
| 2783 | r.push(Dygraph.clone(o[i])); |
| 2784 | } else { |
| 2785 | r.push(o[i]); |
| 2786 | } |
| 2787 | } |
| 2788 | return r; |
| 2789 | }; |
| 2790 | |
| 2791 | |
| 2792 | /** |
| 2793 | * Get the CSV data. If it's in a function, call that function. If it's in a |
| 2794 | * file, do an XMLHttpRequest to get it. |
| 2795 | * @private |
| 2796 | */ |
| 2797 | Dygraph.prototype.start_ = function() { |
| 2798 | if (typeof this.file_ == 'function') { |
| 2799 | // CSV string. Pretend we got it via XHR. |
| 2800 | this.loadedEvent_(this.file_()); |
| 2801 | } else if (Dygraph.isArrayLike(this.file_)) { |
| 2802 | this.rawData_ = this.parseArray_(this.file_); |
| 2803 | this.predraw_(); |
| 2804 | } else if (typeof this.file_ == 'object' && |
| 2805 | typeof this.file_.getColumnRange == 'function') { |
| 2806 | // must be a DataTable from gviz. |
| 2807 | this.parseDataTable_(this.file_); |
| 2808 | this.predraw_(); |
| 2809 | } else if (typeof this.file_ == 'string') { |
| 2810 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. |
| 2811 | if (this.file_.indexOf('\n') >= 0) { |
| 2812 | this.loadedEvent_(this.file_); |
| 2813 | } else { |
| 2814 | var req = new XMLHttpRequest(); |
| 2815 | var caller = this; |
| 2816 | req.onreadystatechange = function () { |
| 2817 | if (req.readyState == 4) { |
| 2818 | if (req.status == 200) { |
| 2819 | caller.loadedEvent_(req.responseText); |
| 2820 | } |
| 2821 | } |
| 2822 | }; |
| 2823 | |
| 2824 | req.open("GET", this.file_, true); |
| 2825 | req.send(null); |
| 2826 | } |
| 2827 | } else { |
| 2828 | this.error("Unknown data format: " + (typeof this.file_)); |
| 2829 | } |
| 2830 | }; |
| 2831 | |
| 2832 | /** |
| 2833 | * Changes various properties of the graph. These can include: |
| 2834 | * <ul> |
| 2835 | * <li>file: changes the source data for the graph</li> |
| 2836 | * <li>errorBars: changes whether the data contains stddev</li> |
| 2837 | * </ul> |
| 2838 | * @param {Object} attrs The new properties and values |
| 2839 | */ |
| 2840 | Dygraph.prototype.updateOptions = function(attrs) { |
| 2841 | // TODO(danvk): this is a mess. Rethink this function. |
| 2842 | if ('rollPeriod' in attrs) { |
| 2843 | this.rollPeriod_ = attrs.rollPeriod; |
| 2844 | } |
| 2845 | if ('dateWindow' in attrs) { |
| 2846 | this.dateWindow_ = attrs.dateWindow; |
| 2847 | } |
| 2848 | |
| 2849 | // TODO(danvk): validate per-series options. |
| 2850 | // Supported: |
| 2851 | // strokeWidth |
| 2852 | // pointSize |
| 2853 | // drawPoints |
| 2854 | // highlightCircleSize |
| 2855 | |
| 2856 | Dygraph.update(this.user_attrs_, attrs); |
| 2857 | Dygraph.update(this.renderOptions_, attrs); |
| 2858 | |
| 2859 | this.labelsFromCSV_ = (this.attr_("labels") == null); |
| 2860 | |
| 2861 | // TODO(danvk): this doesn't match the constructor logic |
| 2862 | this.layout_.updateOptions({ 'errorBars': this.attr_("errorBars") }); |
| 2863 | if (attrs['file']) { |
| 2864 | this.file_ = attrs['file']; |
| 2865 | this.start_(); |
| 2866 | } else { |
| 2867 | this.predraw_(); |
| 2868 | } |
| 2869 | }; |
| 2870 | |
| 2871 | /** |
| 2872 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
| 2873 | * containing div (which has presumably changed size since the dygraph was |
| 2874 | * instantiated. If the width/height are specified, the div will be resized. |
| 2875 | * |
| 2876 | * This is far more efficient than destroying and re-instantiating a |
| 2877 | * Dygraph, since it doesn't have to reparse the underlying data. |
| 2878 | * |
| 2879 | * @param {Number} width Width (in pixels) |
| 2880 | * @param {Number} height Height (in pixels) |
| 2881 | */ |
| 2882 | Dygraph.prototype.resize = function(width, height) { |
| 2883 | if (this.resize_lock) { |
| 2884 | return; |
| 2885 | } |
| 2886 | this.resize_lock = true; |
| 2887 | |
| 2888 | if ((width === null) != (height === null)) { |
| 2889 | this.warn("Dygraph.resize() should be called with zero parameters or " + |
| 2890 | "two non-NULL parameters. Pretending it was zero."); |
| 2891 | width = height = null; |
| 2892 | } |
| 2893 | |
| 2894 | // TODO(danvk): there should be a clear() method. |
| 2895 | this.maindiv_.innerHTML = ""; |
| 2896 | this.attrs_.labelsDiv = null; |
| 2897 | |
| 2898 | if (width) { |
| 2899 | this.maindiv_.style.width = width + "px"; |
| 2900 | this.maindiv_.style.height = height + "px"; |
| 2901 | this.width_ = width; |
| 2902 | this.height_ = height; |
| 2903 | } else { |
| 2904 | this.width_ = this.maindiv_.offsetWidth; |
| 2905 | this.height_ = this.maindiv_.offsetHeight; |
| 2906 | } |
| 2907 | |
| 2908 | this.createInterface_(); |
| 2909 | this.predraw_(); |
| 2910 | |
| 2911 | this.resize_lock = false; |
| 2912 | }; |
| 2913 | |
| 2914 | /** |
| 2915 | * Adjusts the number of days in the rolling average. Updates the graph to |
| 2916 | * reflect the new averaging period. |
| 2917 | * @param {Number} length Number of days over which to average the data. |
| 2918 | */ |
| 2919 | Dygraph.prototype.adjustRoll = function(length) { |
| 2920 | this.rollPeriod_ = length; |
| 2921 | this.predraw_(); |
| 2922 | }; |
| 2923 | |
| 2924 | /** |
| 2925 | * Returns a boolean array of visibility statuses. |
| 2926 | */ |
| 2927 | Dygraph.prototype.visibility = function() { |
| 2928 | // Do lazy-initialization, so that this happens after we know the number of |
| 2929 | // data series. |
| 2930 | if (!this.attr_("visibility")) { |
| 2931 | this.attrs_["visibility"] = []; |
| 2932 | } |
| 2933 | while (this.attr_("visibility").length < this.rawData_[0].length - 1) { |
| 2934 | this.attr_("visibility").push(true); |
| 2935 | } |
| 2936 | return this.attr_("visibility"); |
| 2937 | }; |
| 2938 | |
| 2939 | /** |
| 2940 | * Changes the visiblity of a series. |
| 2941 | */ |
| 2942 | Dygraph.prototype.setVisibility = function(num, value) { |
| 2943 | var x = this.visibility(); |
| 2944 | if (num < 0 || num >= x.length) { |
| 2945 | this.warn("invalid series number in setVisibility: " + num); |
| 2946 | } else { |
| 2947 | x[num] = value; |
| 2948 | this.predraw_(); |
| 2949 | } |
| 2950 | }; |
| 2951 | |
| 2952 | /** |
| 2953 | * Update the list of annotations and redraw the chart. |
| 2954 | */ |
| 2955 | Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { |
| 2956 | // Only add the annotation CSS rule once we know it will be used. |
| 2957 | Dygraph.addAnnotationRule(); |
| 2958 | this.annotations_ = ann; |
| 2959 | this.layout_.setAnnotations(this.annotations_); |
| 2960 | if (!suppressDraw) { |
| 2961 | this.predraw_(); |
| 2962 | } |
| 2963 | }; |
| 2964 | |
| 2965 | /** |
| 2966 | * Return the list of annotations. |
| 2967 | */ |
| 2968 | Dygraph.prototype.annotations = function() { |
| 2969 | return this.annotations_; |
| 2970 | }; |
| 2971 | |
| 2972 | /** |
| 2973 | * Get the index of a series (column) given its name. The first column is the |
| 2974 | * x-axis, so the data series start with index 1. |
| 2975 | */ |
| 2976 | Dygraph.prototype.indexFromSetName = function(name) { |
| 2977 | var labels = this.attr_("labels"); |
| 2978 | for (var i = 0; i < labels.length; i++) { |
| 2979 | if (labels[i] == name) return i; |
| 2980 | } |
| 2981 | return null; |
| 2982 | }; |
| 2983 | |
| 2984 | Dygraph.addAnnotationRule = function() { |
| 2985 | if (Dygraph.addedAnnotationCSS) return; |
| 2986 | |
| 2987 | var rule = "border: 1px solid black; " + |
| 2988 | "background-color: white; " + |
| 2989 | "text-align: center;"; |
| 2990 | |
| 2991 | var styleSheetElement = document.createElement("style"); |
| 2992 | styleSheetElement.type = "text/css"; |
| 2993 | document.getElementsByTagName("head")[0].appendChild(styleSheetElement); |
| 2994 | |
| 2995 | // Find the first style sheet that we can access. |
| 2996 | // We may not add a rule to a style sheet from another domain for security |
| 2997 | // reasons. This sometimes comes up when using gviz, since the Google gviz JS |
| 2998 | // adds its own style sheets from google.com. |
| 2999 | for (var i = 0; i < document.styleSheets.length; i++) { |
| 3000 | if (document.styleSheets[i].disabled) continue; |
| 3001 | var mysheet = document.styleSheets[i]; |
| 3002 | try { |
| 3003 | if (mysheet.insertRule) { // Firefox |
| 3004 | var idx = mysheet.cssRules ? mysheet.cssRules.length : 0; |
| 3005 | mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", idx); |
| 3006 | } else if (mysheet.addRule) { // IE |
| 3007 | mysheet.addRule(".dygraphDefaultAnnotation", rule); |
| 3008 | } |
| 3009 | Dygraph.addedAnnotationCSS = true; |
| 3010 | return; |
| 3011 | } catch(err) { |
| 3012 | // Was likely a security exception. |
| 3013 | } |
| 3014 | } |
| 3015 | |
| 3016 | this.warn("Unable to add default annotation CSS rule; display may be off."); |
| 3017 | } |
| 3018 | |
| 3019 | /** |
| 3020 | * Create a new canvas element. This is more complex than a simple |
| 3021 | * document.createElement("canvas") because of IE and excanvas. |
| 3022 | */ |
| 3023 | Dygraph.createCanvas = function() { |
| 3024 | var canvas = document.createElement("canvas"); |
| 3025 | |
| 3026 | isIE = (/MSIE/.test(navigator.userAgent) && !window.opera); |
| 3027 | if (isIE && (typeof(G_vmlCanvasManager) != 'undefined')) { |
| 3028 | canvas = G_vmlCanvasManager.initElement(canvas); |
| 3029 | } |
| 3030 | |
| 3031 | return canvas; |
| 3032 | }; |
| 3033 | |
| 3034 | |
| 3035 | /** |
| 3036 | * A wrapper around Dygraph that implements the gviz API. |
| 3037 | * @param {Object} container The DOM object the visualization should live in. |
| 3038 | */ |
| 3039 | Dygraph.GVizChart = function(container) { |
| 3040 | this.container = container; |
| 3041 | } |
| 3042 | |
| 3043 | Dygraph.GVizChart.prototype.draw = function(data, options) { |
| 3044 | // Clear out any existing dygraph. |
| 3045 | // TODO(danvk): would it make more sense to simply redraw using the current |
| 3046 | // date_graph object? |
| 3047 | this.container.innerHTML = ''; |
| 3048 | if (typeof(this.date_graph) != 'undefined') { |
| 3049 | this.date_graph.destroy(); |
| 3050 | } |
| 3051 | |
| 3052 | this.date_graph = new Dygraph(this.container, data, options); |
| 3053 | } |
| 3054 | |
| 3055 | /** |
| 3056 | * Google charts compatible setSelection |
| 3057 | * Only row selection is supported, all points in the row will be highlighted |
| 3058 | * @param {Array} array of the selected cells |
| 3059 | * @public |
| 3060 | */ |
| 3061 | Dygraph.GVizChart.prototype.setSelection = function(selection_array) { |
| 3062 | var row = false; |
| 3063 | if (selection_array.length) { |
| 3064 | row = selection_array[0].row; |
| 3065 | } |
| 3066 | this.date_graph.setSelection(row); |
| 3067 | } |
| 3068 | |
| 3069 | /** |
| 3070 | * Google charts compatible getSelection implementation |
| 3071 | * @return {Array} array of the selected cells |
| 3072 | * @public |
| 3073 | */ |
| 3074 | Dygraph.GVizChart.prototype.getSelection = function() { |
| 3075 | var selection = []; |
| 3076 | |
| 3077 | var row = this.date_graph.getSelection(); |
| 3078 | |
| 3079 | if (row < 0) return selection; |
| 3080 | |
| 3081 | col = 1; |
| 3082 | for (var i in this.date_graph.layout_.datasets) { |
| 3083 | selection.push({row: row, column: col}); |
| 3084 | col++; |
| 3085 | } |
| 3086 | |
| 3087 | return selection; |
| 3088 | } |
| 3089 | |
| 3090 | // Older pages may still use this name. |
| 3091 | DateGraph = Dygraph; |