| 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://www.danvk.org/dygraphs |
| 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 | labelsKMB: false, |
| 94 | labelsKMG2: false, |
| 95 | showLabelsOnHighlight: true, |
| 96 | |
| 97 | yValueFormatter: function(x) { return Dygraph.round_(x, 2); }, |
| 98 | |
| 99 | strokeWidth: 1.0, |
| 100 | |
| 101 | axisTickSize: 3, |
| 102 | axisLabelFontSize: 14, |
| 103 | xAxisLabelWidth: 50, |
| 104 | yAxisLabelWidth: 50, |
| 105 | xAxisLabelFormatter: Dygraph.dateAxisFormatter, |
| 106 | rightGap: 5, |
| 107 | |
| 108 | showRoller: false, |
| 109 | xValueFormatter: Dygraph.dateString_, |
| 110 | xValueParser: Dygraph.dateParser, |
| 111 | xTicker: Dygraph.dateTicker, |
| 112 | |
| 113 | delimiter: ',', |
| 114 | |
| 115 | logScale: false, |
| 116 | sigma: 2.0, |
| 117 | errorBars: false, |
| 118 | fractions: false, |
| 119 | wilsonInterval: true, // only relevant if fractions is true |
| 120 | customBars: false, |
| 121 | fillGraph: false, |
| 122 | fillAlpha: 0.15, |
| 123 | connectSeparatedPoints: false, |
| 124 | |
| 125 | stackedGraph: false, |
| 126 | hideOverlayOnMouseOut: true, |
| 127 | |
| 128 | stepPlot: false |
| 129 | }; |
| 130 | |
| 131 | // Various logging levels. |
| 132 | Dygraph.DEBUG = 1; |
| 133 | Dygraph.INFO = 2; |
| 134 | Dygraph.WARNING = 3; |
| 135 | Dygraph.ERROR = 3; |
| 136 | |
| 137 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { |
| 138 | // Labels is no longer a constructor parameter, since it's typically set |
| 139 | // directly from the data source. It also conains a name for the x-axis, |
| 140 | // which the previous constructor form did not. |
| 141 | if (labels != null) { |
| 142 | var new_labels = ["Date"]; |
| 143 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); |
| 144 | Dygraph.update(attrs, { 'labels': new_labels }); |
| 145 | } |
| 146 | this.__init__(div, file, attrs); |
| 147 | }; |
| 148 | |
| 149 | /** |
| 150 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
| 151 | * and interaction <canvas> inside of it. See the constructor for details |
| 152 | * on the parameters. |
| 153 | * @param {Element} div the Element to render the graph into. |
| 154 | * @param {String | Function} file Source data |
| 155 | * @param {Object} attrs Miscellaneous other options |
| 156 | * @private |
| 157 | */ |
| 158 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
| 159 | // Support two-argument constructor |
| 160 | if (attrs == null) { attrs = {}; } |
| 161 | |
| 162 | // Copy the important bits into the object |
| 163 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
| 164 | this.maindiv_ = div; |
| 165 | this.file_ = file; |
| 166 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
| 167 | this.previousVerticalX_ = -1; |
| 168 | this.fractions_ = attrs.fractions || false; |
| 169 | this.dateWindow_ = attrs.dateWindow || null; |
| 170 | this.valueRange_ = attrs.valueRange || null; |
| 171 | this.wilsonInterval_ = attrs.wilsonInterval || true; |
| 172 | this.is_initial_draw_ = true; |
| 173 | |
| 174 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
| 175 | // div, then only one will be drawn. |
| 176 | div.innerHTML = ""; |
| 177 | |
| 178 | // If the div isn't already sized then inherit from our attrs or |
| 179 | // give it a default size. |
| 180 | if (div.style.width == '') { |
| 181 | div.style.width = attrs.width || Dygraph.DEFAULT_WIDTH + "px"; |
| 182 | } |
| 183 | if (div.style.height == '') { |
| 184 | div.style.height = attrs.height || Dygraph.DEFAULT_HEIGHT + "px"; |
| 185 | } |
| 186 | this.width_ = parseInt(div.style.width, 10); |
| 187 | this.height_ = parseInt(div.style.height, 10); |
| 188 | // The div might have been specified as percent of the current window size, |
| 189 | // convert that to an appropriate number of pixels. |
| 190 | if (div.style.width.indexOf("%") == div.style.width.length - 1) { |
| 191 | this.width_ = div.offsetWidth; |
| 192 | } |
| 193 | if (div.style.height.indexOf("%") == div.style.height.length - 1) { |
| 194 | this.height_ = div.offsetHeight; |
| 195 | } |
| 196 | |
| 197 | if (this.width_ == 0) { |
| 198 | this.error("dygraph has zero width. Please specify a width in pixels."); |
| 199 | } |
| 200 | if (this.height_ == 0) { |
| 201 | this.error("dygraph has zero height. Please specify a height in pixels."); |
| 202 | } |
| 203 | |
| 204 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
| 205 | if (attrs['stackedGraph']) { |
| 206 | attrs['fillGraph'] = true; |
| 207 | // TODO(nikhilk): Add any other stackedGraph checks here. |
| 208 | } |
| 209 | |
| 210 | // Dygraphs has many options, some of which interact with one another. |
| 211 | // To keep track of everything, we maintain two sets of options: |
| 212 | // |
| 213 | // this.user_attrs_ only options explicitly set by the user. |
| 214 | // this.attrs_ defaults, options derived from user_attrs_, data. |
| 215 | // |
| 216 | // Options are then accessed this.attr_('attr'), which first looks at |
| 217 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent |
| 218 | // defaults without overriding behavior that the user specifically asks for. |
| 219 | this.user_attrs_ = {}; |
| 220 | Dygraph.update(this.user_attrs_, attrs); |
| 221 | |
| 222 | this.attrs_ = {}; |
| 223 | Dygraph.update(this.attrs_, Dygraph.DEFAULT_ATTRS); |
| 224 | |
| 225 | this.boundaryIds_ = []; |
| 226 | |
| 227 | // Make a note of whether labels will be pulled from the CSV file. |
| 228 | this.labelsFromCSV_ = (this.attr_("labels") == null); |
| 229 | |
| 230 | // Create the containing DIV and other interactive elements |
| 231 | this.createInterface_(); |
| 232 | |
| 233 | this.start_(); |
| 234 | }; |
| 235 | |
| 236 | Dygraph.prototype.attr_ = function(name) { |
| 237 | if (typeof(this.user_attrs_[name]) != 'undefined') { |
| 238 | return this.user_attrs_[name]; |
| 239 | } else if (typeof(this.attrs_[name]) != 'undefined') { |
| 240 | return this.attrs_[name]; |
| 241 | } else { |
| 242 | return null; |
| 243 | } |
| 244 | }; |
| 245 | |
| 246 | // TODO(danvk): any way I can get the line numbers to be this.warn call? |
| 247 | Dygraph.prototype.log = function(severity, message) { |
| 248 | if (typeof(console) != 'undefined') { |
| 249 | switch (severity) { |
| 250 | case Dygraph.DEBUG: |
| 251 | console.debug('dygraphs: ' + message); |
| 252 | break; |
| 253 | case Dygraph.INFO: |
| 254 | console.info('dygraphs: ' + message); |
| 255 | break; |
| 256 | case Dygraph.WARNING: |
| 257 | console.warn('dygraphs: ' + message); |
| 258 | break; |
| 259 | case Dygraph.ERROR: |
| 260 | console.error('dygraphs: ' + message); |
| 261 | break; |
| 262 | } |
| 263 | } |
| 264 | } |
| 265 | Dygraph.prototype.info = function(message) { |
| 266 | this.log(Dygraph.INFO, message); |
| 267 | } |
| 268 | Dygraph.prototype.warn = function(message) { |
| 269 | this.log(Dygraph.WARNING, message); |
| 270 | } |
| 271 | Dygraph.prototype.error = function(message) { |
| 272 | this.log(Dygraph.ERROR, message); |
| 273 | } |
| 274 | |
| 275 | /** |
| 276 | * Returns the current rolling period, as set by the user or an option. |
| 277 | * @return {Number} The number of days in the rolling window |
| 278 | */ |
| 279 | Dygraph.prototype.rollPeriod = function() { |
| 280 | return this.rollPeriod_; |
| 281 | }; |
| 282 | |
| 283 | /** |
| 284 | * Returns the currently-visible x-range. This can be affected by zooming, |
| 285 | * panning or a call to updateOptions. |
| 286 | * Returns a two-element array: [left, right]. |
| 287 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. |
| 288 | */ |
| 289 | Dygraph.prototype.xAxisRange = function() { |
| 290 | if (this.dateWindow_) return this.dateWindow_; |
| 291 | |
| 292 | // The entire chart is visible. |
| 293 | var left = this.rawData_[0][0]; |
| 294 | var right = this.rawData_[this.rawData_.length - 1][0]; |
| 295 | return [left, right]; |
| 296 | }; |
| 297 | |
| 298 | /** |
| 299 | * Returns the currently-visible y-range. This can be affected by zooming, |
| 300 | * panning or a call to updateOptions. |
| 301 | * Returns a two-element array: [bottom, top]. |
| 302 | */ |
| 303 | Dygraph.prototype.yAxisRange = function() { |
| 304 | return this.displayedYRange_; |
| 305 | }; |
| 306 | |
| 307 | /** |
| 308 | * Convert from data coordinates to canvas/div X/Y coordinates. |
| 309 | * Returns a two-element array: [X, Y] |
| 310 | */ |
| 311 | Dygraph.prototype.toDomCoords = function(x, y) { |
| 312 | var ret = [null, null]; |
| 313 | var area = this.plotter_.area; |
| 314 | if (x !== null) { |
| 315 | var xRange = this.xAxisRange(); |
| 316 | ret[0] = area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; |
| 317 | } |
| 318 | |
| 319 | if (y !== null) { |
| 320 | var yRange = this.yAxisRange(); |
| 321 | ret[1] = area.y + (yRange[1] - y) / (yRange[1] - yRange[0]) * area.h; |
| 322 | } |
| 323 | |
| 324 | return ret; |
| 325 | }; |
| 326 | |
| 327 | // TODO(danvk): use these functions throughout dygraphs. |
| 328 | /** |
| 329 | * Convert from canvas/div coords to data coordinates. |
| 330 | * Returns a two-element array: [X, Y] |
| 331 | */ |
| 332 | Dygraph.prototype.toDataCoords = function(x, y) { |
| 333 | var ret = [null, null]; |
| 334 | var area = this.plotter_.area; |
| 335 | if (x !== null) { |
| 336 | var xRange = this.xAxisRange(); |
| 337 | ret[0] = xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); |
| 338 | } |
| 339 | |
| 340 | if (y !== null) { |
| 341 | var yRange = this.yAxisRange(); |
| 342 | ret[1] = yRange[0] + (area.h - y) / area.h * (yRange[1] - yRange[0]); |
| 343 | } |
| 344 | |
| 345 | return ret; |
| 346 | }; |
| 347 | |
| 348 | Dygraph.addEvent = function(el, evt, fn) { |
| 349 | var normed_fn = function(e) { |
| 350 | if (!e) var e = window.event; |
| 351 | fn(e); |
| 352 | }; |
| 353 | if (window.addEventListener) { // Mozilla, Netscape, Firefox |
| 354 | el.addEventListener(evt, normed_fn, false); |
| 355 | } else { // IE |
| 356 | el.attachEvent('on' + evt, normed_fn); |
| 357 | } |
| 358 | }; |
| 359 | |
| 360 | Dygraph.clipCanvas_ = function(cnv, clip) { |
| 361 | var ctx = cnv.getContext("2d"); |
| 362 | ctx.beginPath(); |
| 363 | ctx.rect(clip.left, clip.top, clip.width, clip.height); |
| 364 | ctx.clip(); |
| 365 | }; |
| 366 | |
| 367 | /** |
| 368 | * Generates interface elements for the Dygraph: a containing div, a div to |
| 369 | * display the current point, and a textbox to adjust the rolling average |
| 370 | * period. Also creates the Renderer/Layout elements. |
| 371 | * @private |
| 372 | */ |
| 373 | Dygraph.prototype.createInterface_ = function() { |
| 374 | // Create the all-enclosing graph div |
| 375 | var enclosing = this.maindiv_; |
| 376 | |
| 377 | this.graphDiv = document.createElement("div"); |
| 378 | this.graphDiv.style.width = this.width_ + "px"; |
| 379 | this.graphDiv.style.height = this.height_ + "px"; |
| 380 | enclosing.appendChild(this.graphDiv); |
| 381 | |
| 382 | var clip = { |
| 383 | top: 0, |
| 384 | left: this.attr_("yAxisLabelWidth") + 2 * this.attr_("axisTickSize") |
| 385 | }; |
| 386 | clip.width = this.width_ - clip.left - this.attr_("rightGap"); |
| 387 | clip.height = this.height_ - this.attr_("axisLabelFontSize") |
| 388 | - 2 * this.attr_("axisTickSize"); |
| 389 | this.clippingArea_ = clip; |
| 390 | |
| 391 | // Create the canvas for interactive parts of the chart. |
| 392 | this.canvas_ = Dygraph.createCanvas(); |
| 393 | this.canvas_.style.position = "absolute"; |
| 394 | this.canvas_.width = this.width_; |
| 395 | this.canvas_.height = this.height_; |
| 396 | this.canvas_.style.width = this.width_ + "px"; // for IE |
| 397 | this.canvas_.style.height = this.height_ + "px"; // for IE |
| 398 | |
| 399 | // ... and for static parts of the chart. |
| 400 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
| 401 | |
| 402 | // The interactive parts of the graph are drawn on top of the chart. |
| 403 | this.graphDiv.appendChild(this.hidden_); |
| 404 | this.graphDiv.appendChild(this.canvas_); |
| 405 | this.mouseEventElement_ = this.canvas_; |
| 406 | |
| 407 | // Make sure we don't overdraw. |
| 408 | Dygraph.clipCanvas_(this.hidden_, this.clippingArea_); |
| 409 | Dygraph.clipCanvas_(this.canvas_, this.clippingArea_); |
| 410 | |
| 411 | var dygraph = this; |
| 412 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(e) { |
| 413 | dygraph.mouseMove_(e); |
| 414 | }); |
| 415 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(e) { |
| 416 | dygraph.mouseOut_(e); |
| 417 | }); |
| 418 | |
| 419 | // Create the grapher |
| 420 | // TODO(danvk): why does the Layout need its own set of options? |
| 421 | this.layoutOptions_ = { 'xOriginIsZero': false }; |
| 422 | Dygraph.update(this.layoutOptions_, this.attrs_); |
| 423 | Dygraph.update(this.layoutOptions_, this.user_attrs_); |
| 424 | Dygraph.update(this.layoutOptions_, { |
| 425 | 'errorBars': (this.attr_("errorBars") || this.attr_("customBars")) }); |
| 426 | |
| 427 | this.layout_ = new DygraphLayout(this, this.layoutOptions_); |
| 428 | |
| 429 | // TODO(danvk): why does the Renderer need its own set of options? |
| 430 | this.renderOptions_ = { colorScheme: this.colors_, |
| 431 | strokeColor: null, |
| 432 | axisLineWidth: Dygraph.AXIS_LINE_WIDTH }; |
| 433 | Dygraph.update(this.renderOptions_, this.attrs_); |
| 434 | Dygraph.update(this.renderOptions_, this.user_attrs_); |
| 435 | this.plotter_ = new DygraphCanvasRenderer(this, |
| 436 | this.hidden_, this.layout_, |
| 437 | this.renderOptions_); |
| 438 | |
| 439 | this.createStatusMessage_(); |
| 440 | this.createRollInterface_(); |
| 441 | this.createDragInterface_(); |
| 442 | }; |
| 443 | |
| 444 | /** |
| 445 | * Detach DOM elements in the dygraph and null out all data references. |
| 446 | * Calling this when you're done with a dygraph can dramatically reduce memory |
| 447 | * usage. See, e.g., the tests/perf.html example. |
| 448 | */ |
| 449 | Dygraph.prototype.destroy = function() { |
| 450 | var removeRecursive = function(node) { |
| 451 | while (node.hasChildNodes()) { |
| 452 | removeRecursive(node.firstChild); |
| 453 | node.removeChild(node.firstChild); |
| 454 | } |
| 455 | }; |
| 456 | removeRecursive(this.maindiv_); |
| 457 | |
| 458 | var nullOut = function(obj) { |
| 459 | for (var n in obj) { |
| 460 | if (typeof(obj[n]) === 'object') { |
| 461 | obj[n] = null; |
| 462 | } |
| 463 | } |
| 464 | }; |
| 465 | |
| 466 | // These may not all be necessary, but it can't hurt... |
| 467 | nullOut(this.layout_); |
| 468 | nullOut(this.plotter_); |
| 469 | nullOut(this); |
| 470 | }; |
| 471 | |
| 472 | /** |
| 473 | * Creates the canvas containing the PlotKit graph. Only plotkit ever draws on |
| 474 | * this particular canvas. All Dygraph work is done on this.canvas_. |
| 475 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
| 476 | * @return {Object} The newly-created canvas |
| 477 | * @private |
| 478 | */ |
| 479 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
| 480 | var h = Dygraph.createCanvas(); |
| 481 | h.style.position = "absolute"; |
| 482 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
| 483 | // some extra area to make it easier to zoom in on the far left and far |
| 484 | // right. h needs to be precisely the plot area, so that clipping occurs. |
| 485 | h.style.top = canvas.style.top; |
| 486 | h.style.left = canvas.style.left; |
| 487 | h.width = this.width_; |
| 488 | h.height = this.height_; |
| 489 | h.style.width = this.width_ + "px"; // for IE |
| 490 | h.style.height = this.height_ + "px"; // for IE |
| 491 | return h; |
| 492 | }; |
| 493 | |
| 494 | // Taken from MochiKit.Color |
| 495 | Dygraph.hsvToRGB = function (hue, saturation, value) { |
| 496 | var red; |
| 497 | var green; |
| 498 | var blue; |
| 499 | if (saturation === 0) { |
| 500 | red = value; |
| 501 | green = value; |
| 502 | blue = value; |
| 503 | } else { |
| 504 | var i = Math.floor(hue * 6); |
| 505 | var f = (hue * 6) - i; |
| 506 | var p = value * (1 - saturation); |
| 507 | var q = value * (1 - (saturation * f)); |
| 508 | var t = value * (1 - (saturation * (1 - f))); |
| 509 | switch (i) { |
| 510 | case 1: red = q; green = value; blue = p; break; |
| 511 | case 2: red = p; green = value; blue = t; break; |
| 512 | case 3: red = p; green = q; blue = value; break; |
| 513 | case 4: red = t; green = p; blue = value; break; |
| 514 | case 5: red = value; green = p; blue = q; break; |
| 515 | case 6: // fall through |
| 516 | case 0: red = value; green = t; blue = p; break; |
| 517 | } |
| 518 | } |
| 519 | red = Math.floor(255 * red + 0.5); |
| 520 | green = Math.floor(255 * green + 0.5); |
| 521 | blue = Math.floor(255 * blue + 0.5); |
| 522 | return 'rgb(' + red + ',' + green + ',' + blue + ')'; |
| 523 | }; |
| 524 | |
| 525 | |
| 526 | /** |
| 527 | * Generate a set of distinct colors for the data series. This is done with a |
| 528 | * color wheel. Saturation/Value are customizable, and the hue is |
| 529 | * equally-spaced around the color wheel. If a custom set of colors is |
| 530 | * specified, that is used instead. |
| 531 | * @private |
| 532 | */ |
| 533 | Dygraph.prototype.setColors_ = function() { |
| 534 | // TODO(danvk): compute this directly into this.attrs_['colorScheme'] and do |
| 535 | // away with this.renderOptions_. |
| 536 | var num = this.attr_("labels").length - 1; |
| 537 | this.colors_ = []; |
| 538 | var colors = this.attr_('colors'); |
| 539 | if (!colors) { |
| 540 | var sat = this.attr_('colorSaturation') || 1.0; |
| 541 | var val = this.attr_('colorValue') || 0.5; |
| 542 | var half = Math.ceil(num / 2); |
| 543 | for (var i = 1; i <= num; i++) { |
| 544 | if (!this.visibility()[i-1]) continue; |
| 545 | // alternate colors for high contrast. |
| 546 | var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2); |
| 547 | var hue = (1.0 * idx/ (1 + num)); |
| 548 | this.colors_.push(Dygraph.hsvToRGB(hue, sat, val)); |
| 549 | } |
| 550 | } else { |
| 551 | for (var i = 0; i < num; i++) { |
| 552 | if (!this.visibility()[i]) continue; |
| 553 | var colorStr = colors[i % colors.length]; |
| 554 | this.colors_.push(colorStr); |
| 555 | } |
| 556 | } |
| 557 | |
| 558 | // TODO(danvk): update this w/r/t/ the new options system. |
| 559 | this.renderOptions_.colorScheme = this.colors_; |
| 560 | Dygraph.update(this.plotter_.options, this.renderOptions_); |
| 561 | Dygraph.update(this.layoutOptions_, this.user_attrs_); |
| 562 | Dygraph.update(this.layoutOptions_, this.attrs_); |
| 563 | } |
| 564 | |
| 565 | /** |
| 566 | * Return the list of colors. This is either the list of colors passed in the |
| 567 | * attributes, or the autogenerated list of rgb(r,g,b) strings. |
| 568 | * @return {Array<string>} The list of colors. |
| 569 | */ |
| 570 | Dygraph.prototype.getColors = function() { |
| 571 | return this.colors_; |
| 572 | }; |
| 573 | |
| 574 | // The following functions are from quirksmode.org with a modification for Safari from |
| 575 | // http://blog.firetree.net/2005/07/04/javascript-find-position/ |
| 576 | // http://www.quirksmode.org/js/findpos.html |
| 577 | Dygraph.findPosX = function(obj) { |
| 578 | var curleft = 0; |
| 579 | if(obj.offsetParent) |
| 580 | while(1) |
| 581 | { |
| 582 | curleft += obj.offsetLeft; |
| 583 | if(!obj.offsetParent) |
| 584 | break; |
| 585 | obj = obj.offsetParent; |
| 586 | } |
| 587 | else if(obj.x) |
| 588 | curleft += obj.x; |
| 589 | return curleft; |
| 590 | }; |
| 591 | |
| 592 | Dygraph.findPosY = function(obj) { |
| 593 | var curtop = 0; |
| 594 | if(obj.offsetParent) |
| 595 | while(1) |
| 596 | { |
| 597 | curtop += obj.offsetTop; |
| 598 | if(!obj.offsetParent) |
| 599 | break; |
| 600 | obj = obj.offsetParent; |
| 601 | } |
| 602 | else if(obj.y) |
| 603 | curtop += obj.y; |
| 604 | return curtop; |
| 605 | }; |
| 606 | |
| 607 | |
| 608 | |
| 609 | /** |
| 610 | * Create the div that contains information on the selected point(s) |
| 611 | * This goes in the top right of the canvas, unless an external div has already |
| 612 | * been specified. |
| 613 | * @private |
| 614 | */ |
| 615 | Dygraph.prototype.createStatusMessage_ = function(){ |
| 616 | if (!this.attr_("labelsDiv")) { |
| 617 | var divWidth = this.attr_('labelsDivWidth'); |
| 618 | var messagestyle = { |
| 619 | "position": "absolute", |
| 620 | "fontSize": "14px", |
| 621 | "zIndex": 10, |
| 622 | "width": divWidth + "px", |
| 623 | "top": "0px", |
| 624 | "left": (this.width_ - divWidth - 2) + "px", |
| 625 | "background": "white", |
| 626 | "textAlign": "left", |
| 627 | "overflow": "hidden"}; |
| 628 | Dygraph.update(messagestyle, this.attr_('labelsDivStyles')); |
| 629 | var div = document.createElement("div"); |
| 630 | for (var name in messagestyle) { |
| 631 | if (messagestyle.hasOwnProperty(name)) { |
| 632 | div.style[name] = messagestyle[name]; |
| 633 | } |
| 634 | } |
| 635 | this.graphDiv.appendChild(div); |
| 636 | this.attrs_.labelsDiv = div; |
| 637 | } |
| 638 | }; |
| 639 | |
| 640 | /** |
| 641 | * Create the text box to adjust the averaging period |
| 642 | * @return {Object} The newly-created text box |
| 643 | * @private |
| 644 | */ |
| 645 | Dygraph.prototype.createRollInterface_ = function() { |
| 646 | var display = this.attr_('showRoller') ? "block" : "none"; |
| 647 | var textAttr = { "position": "absolute", |
| 648 | "zIndex": 10, |
| 649 | "top": (this.plotter_.area.h - 25) + "px", |
| 650 | "left": (this.plotter_.area.x + 1) + "px", |
| 651 | "display": display |
| 652 | }; |
| 653 | var roller = document.createElement("input"); |
| 654 | roller.type = "text"; |
| 655 | roller.size = "2"; |
| 656 | roller.value = this.rollPeriod_; |
| 657 | for (var name in textAttr) { |
| 658 | if (textAttr.hasOwnProperty(name)) { |
| 659 | roller.style[name] = textAttr[name]; |
| 660 | } |
| 661 | } |
| 662 | |
| 663 | var pa = this.graphDiv; |
| 664 | pa.appendChild(roller); |
| 665 | var dygraph = this; |
| 666 | roller.onchange = function() { dygraph.adjustRoll(roller.value); }; |
| 667 | return roller; |
| 668 | }; |
| 669 | |
| 670 | // These functions are taken from MochiKit.Signal |
| 671 | Dygraph.pageX = function(e) { |
| 672 | if (e.pageX) { |
| 673 | return (!e.pageX || e.pageX < 0) ? 0 : e.pageX; |
| 674 | } else { |
| 675 | var de = document; |
| 676 | var b = document.body; |
| 677 | return e.clientX + |
| 678 | (de.scrollLeft || b.scrollLeft) - |
| 679 | (de.clientLeft || 0); |
| 680 | } |
| 681 | }; |
| 682 | |
| 683 | Dygraph.pageY = function(e) { |
| 684 | if (e.pageY) { |
| 685 | return (!e.pageY || e.pageY < 0) ? 0 : e.pageY; |
| 686 | } else { |
| 687 | var de = document; |
| 688 | var b = document.body; |
| 689 | return e.clientY + |
| 690 | (de.scrollTop || b.scrollTop) - |
| 691 | (de.clientTop || 0); |
| 692 | } |
| 693 | }; |
| 694 | |
| 695 | /** |
| 696 | * Set up all the mouse handlers needed to capture dragging behavior for zoom |
| 697 | * events. |
| 698 | * @private |
| 699 | */ |
| 700 | Dygraph.prototype.createDragInterface_ = function() { |
| 701 | var self = this; |
| 702 | |
| 703 | // Tracks whether the mouse is down right now |
| 704 | var isZooming = false; |
| 705 | var isPanning = false; |
| 706 | var dragStartX = null; |
| 707 | var dragStartY = null; |
| 708 | var dragEndX = null; |
| 709 | var dragEndY = null; |
| 710 | var prevEndX = null; |
| 711 | var draggingDate = null; |
| 712 | var dateRange = null; |
| 713 | |
| 714 | // Utility function to convert page-wide coordinates to canvas coords |
| 715 | var px = 0; |
| 716 | var py = 0; |
| 717 | var getX = function(e) { return Dygraph.pageX(e) - px }; |
| 718 | var getY = function(e) { return Dygraph.pageX(e) - py }; |
| 719 | |
| 720 | // Draw zoom rectangles when the mouse is down and the user moves around |
| 721 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(event) { |
| 722 | if (isZooming) { |
| 723 | dragEndX = getX(event); |
| 724 | dragEndY = getY(event); |
| 725 | |
| 726 | self.drawZoomRect_(dragStartX, dragEndX, prevEndX); |
| 727 | prevEndX = dragEndX; |
| 728 | } else if (isPanning) { |
| 729 | dragEndX = getX(event); |
| 730 | dragEndY = getY(event); |
| 731 | |
| 732 | // Want to have it so that: |
| 733 | // 1. draggingDate appears at dragEndX |
| 734 | // 2. daterange = (dateWindow_[1] - dateWindow_[0]) is unaltered. |
| 735 | |
| 736 | self.dateWindow_[0] = draggingDate - (dragEndX / self.width_) * dateRange; |
| 737 | self.dateWindow_[1] = self.dateWindow_[0] + dateRange; |
| 738 | self.drawGraph_(self.rawData_); |
| 739 | } |
| 740 | }); |
| 741 | |
| 742 | // Track the beginning of drag events |
| 743 | Dygraph.addEvent(this.mouseEventElement_, 'mousedown', function(event) { |
| 744 | px = Dygraph.findPosX(self.canvas_); |
| 745 | py = Dygraph.findPosY(self.canvas_); |
| 746 | dragStartX = getX(event); |
| 747 | dragStartY = getY(event); |
| 748 | |
| 749 | if (event.altKey || event.shiftKey) { |
| 750 | if (!self.dateWindow_) return; // have to be zoomed in to pan. |
| 751 | isPanning = true; |
| 752 | dateRange = self.dateWindow_[1] - self.dateWindow_[0]; |
| 753 | draggingDate = (dragStartX / self.width_) * dateRange + |
| 754 | self.dateWindow_[0]; |
| 755 | } else { |
| 756 | isZooming = true; |
| 757 | } |
| 758 | }); |
| 759 | |
| 760 | // If the user releases the mouse button during a drag, but not over the |
| 761 | // canvas, then it doesn't count as a zooming action. |
| 762 | Dygraph.addEvent(document, 'mouseup', function(event) { |
| 763 | if (isZooming || isPanning) { |
| 764 | isZooming = false; |
| 765 | dragStartX = null; |
| 766 | dragStartY = null; |
| 767 | } |
| 768 | |
| 769 | if (isPanning) { |
| 770 | isPanning = false; |
| 771 | draggingDate = null; |
| 772 | dateRange = null; |
| 773 | } |
| 774 | }); |
| 775 | |
| 776 | // Temporarily cancel the dragging event when the mouse leaves the graph |
| 777 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(event) { |
| 778 | if (isZooming) { |
| 779 | dragEndX = null; |
| 780 | dragEndY = null; |
| 781 | } |
| 782 | }); |
| 783 | |
| 784 | // If the mouse is released on the canvas during a drag event, then it's a |
| 785 | // zoom. Only do the zoom if it's over a large enough area (>= 10 pixels) |
| 786 | Dygraph.addEvent(this.mouseEventElement_, 'mouseup', function(event) { |
| 787 | if (isZooming) { |
| 788 | isZooming = false; |
| 789 | dragEndX = getX(event); |
| 790 | dragEndY = getY(event); |
| 791 | var regionWidth = Math.abs(dragEndX - dragStartX); |
| 792 | var regionHeight = Math.abs(dragEndY - dragStartY); |
| 793 | |
| 794 | if (regionWidth < 2 && regionHeight < 2 && |
| 795 | self.attr_('clickCallback') != null && |
| 796 | self.lastx_ != undefined) { |
| 797 | // TODO(danvk): pass along more info about the points. |
| 798 | self.attr_('clickCallback')(event, self.lastx_, self.selPoints_); |
| 799 | } |
| 800 | |
| 801 | if (regionWidth >= 10) { |
| 802 | self.doZoom_(Math.min(dragStartX, dragEndX), |
| 803 | Math.max(dragStartX, dragEndX)); |
| 804 | } else { |
| 805 | self.canvas_.getContext("2d").clearRect(0, 0, |
| 806 | self.canvas_.width, |
| 807 | self.canvas_.height); |
| 808 | } |
| 809 | |
| 810 | dragStartX = null; |
| 811 | dragStartY = null; |
| 812 | } |
| 813 | |
| 814 | if (isPanning) { |
| 815 | isPanning = false; |
| 816 | draggingDate = null; |
| 817 | dateRange = null; |
| 818 | } |
| 819 | }); |
| 820 | |
| 821 | // Double-clicking zooms back out |
| 822 | Dygraph.addEvent(this.mouseEventElement_, 'dblclick', function(event) { |
| 823 | if (self.dateWindow_ == null) return; |
| 824 | self.dateWindow_ = null; |
| 825 | self.drawGraph_(self.rawData_); |
| 826 | var minDate = self.rawData_[0][0]; |
| 827 | var maxDate = self.rawData_[self.rawData_.length - 1][0]; |
| 828 | if (self.attr_("zoomCallback")) { |
| 829 | self.attr_("zoomCallback")(minDate, maxDate); |
| 830 | } |
| 831 | }); |
| 832 | }; |
| 833 | |
| 834 | /** |
| 835 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears |
| 836 | * up any previous zoom rectangles that were drawn. This could be optimized to |
| 837 | * avoid extra redrawing, but it's tricky to avoid interactions with the status |
| 838 | * dots. |
| 839 | * @param {Number} startX The X position where the drag started, in canvas |
| 840 | * coordinates. |
| 841 | * @param {Number} endX The current X position of the drag, in canvas coords. |
| 842 | * @param {Number} prevEndX The value of endX on the previous call to this |
| 843 | * function. Used to avoid excess redrawing |
| 844 | * @private |
| 845 | */ |
| 846 | Dygraph.prototype.drawZoomRect_ = function(startX, endX, prevEndX) { |
| 847 | var ctx = this.canvas_.getContext("2d"); |
| 848 | |
| 849 | // Clean up from the previous rect if necessary |
| 850 | if (prevEndX) { |
| 851 | ctx.clearRect(Math.min(startX, prevEndX), 0, |
| 852 | Math.abs(startX - prevEndX), this.height_); |
| 853 | } |
| 854 | |
| 855 | // Draw a light-grey rectangle to show the new viewing area |
| 856 | if (endX && startX) { |
| 857 | ctx.fillStyle = "rgba(128,128,128,0.33)"; |
| 858 | ctx.fillRect(Math.min(startX, endX), 0, |
| 859 | Math.abs(endX - startX), this.height_); |
| 860 | } |
| 861 | }; |
| 862 | |
| 863 | /** |
| 864 | * Zoom to something containing [lowX, highX]. These are pixel coordinates |
| 865 | * in the canvas. The exact zoom window may be slightly larger if there are no |
| 866 | * data points near lowX or highX. This function redraws the graph. |
| 867 | * @param {Number} lowX The leftmost pixel value that should be visible. |
| 868 | * @param {Number} highX The rightmost pixel value that should be visible. |
| 869 | * @private |
| 870 | */ |
| 871 | Dygraph.prototype.doZoom_ = function(lowX, highX) { |
| 872 | // Find the earliest and latest dates contained in this canvasx range. |
| 873 | var r = this.toDataCoords(lowX, null); |
| 874 | var minDate = r[0]; |
| 875 | r = this.toDataCoords(highX, null); |
| 876 | var maxDate = r[0]; |
| 877 | |
| 878 | this.dateWindow_ = [minDate, maxDate]; |
| 879 | this.drawGraph_(this.rawData_); |
| 880 | if (this.attr_("zoomCallback")) { |
| 881 | this.attr_("zoomCallback")(minDate, maxDate); |
| 882 | } |
| 883 | }; |
| 884 | |
| 885 | /** |
| 886 | * When the mouse moves in the canvas, display information about a nearby data |
| 887 | * point and draw dots over those points in the data series. This function |
| 888 | * takes care of cleanup of previously-drawn dots. |
| 889 | * @param {Object} event The mousemove event from the browser. |
| 890 | * @private |
| 891 | */ |
| 892 | Dygraph.prototype.mouseMove_ = function(event) { |
| 893 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_); |
| 894 | var points = this.layout_.points; |
| 895 | |
| 896 | var lastx = -1; |
| 897 | var lasty = -1; |
| 898 | |
| 899 | // Loop through all the points and find the date nearest to our current |
| 900 | // location. |
| 901 | var minDist = 1e+100; |
| 902 | var idx = -1; |
| 903 | for (var i = 0; i < points.length; i++) { |
| 904 | var dist = Math.abs(points[i].canvasx - canvasx); |
| 905 | if (dist > minDist) continue; |
| 906 | minDist = dist; |
| 907 | idx = i; |
| 908 | } |
| 909 | if (idx >= 0) lastx = points[idx].xval; |
| 910 | // Check that you can really highlight the last day's data |
| 911 | if (canvasx > points[points.length-1].canvasx) |
| 912 | lastx = points[points.length-1].xval; |
| 913 | |
| 914 | // Extract the points we've selected |
| 915 | this.selPoints_ = []; |
| 916 | var l = points.length; |
| 917 | if (!this.attr_("stackedGraph")) { |
| 918 | for (var i = 0; i < l; i++) { |
| 919 | if (points[i].xval == lastx) { |
| 920 | this.selPoints_.push(points[i]); |
| 921 | } |
| 922 | } |
| 923 | } else { |
| 924 | // Need to 'unstack' points starting from the bottom |
| 925 | var cumulative_sum = 0; |
| 926 | for (var i = l - 1; i >= 0; i--) { |
| 927 | if (points[i].xval == lastx) { |
| 928 | var p = {}; // Clone the point since we modify it |
| 929 | for (var k in points[i]) { |
| 930 | p[k] = points[i][k]; |
| 931 | } |
| 932 | p.yval -= cumulative_sum; |
| 933 | cumulative_sum += p.yval; |
| 934 | this.selPoints_.push(p); |
| 935 | } |
| 936 | } |
| 937 | this.selPoints_.reverse(); |
| 938 | } |
| 939 | |
| 940 | if (this.attr_("highlightCallback")) { |
| 941 | var px = this.lastx_; |
| 942 | if (px !== null && lastx != px) { |
| 943 | // only fire if the selected point has changed. |
| 944 | this.attr_("highlightCallback")(event, lastx, this.selPoints_); |
| 945 | } |
| 946 | } |
| 947 | |
| 948 | // Save last x position for callbacks. |
| 949 | this.lastx_ = lastx; |
| 950 | |
| 951 | this.updateSelection_(); |
| 952 | }; |
| 953 | |
| 954 | /** |
| 955 | * Draw dots over the selectied points in the data series. This function |
| 956 | * takes care of cleanup of previously-drawn dots. |
| 957 | * @private |
| 958 | */ |
| 959 | Dygraph.prototype.updateSelection_ = function() { |
| 960 | // Clear the previously drawn vertical, if there is one |
| 961 | var circleSize = this.attr_('highlightCircleSize'); |
| 962 | var ctx = this.canvas_.getContext("2d"); |
| 963 | if (this.previousVerticalX_ >= 0) { |
| 964 | var px = this.previousVerticalX_; |
| 965 | ctx.clearRect(px - circleSize - 1, 0, 2 * circleSize + 2, this.height_); |
| 966 | } |
| 967 | |
| 968 | var isOK = function(x) { return x && !isNaN(x); }; |
| 969 | |
| 970 | if (this.selPoints_.length > 0) { |
| 971 | var canvasx = this.selPoints_[0].canvasx; |
| 972 | |
| 973 | // Set the status message to indicate the selected point(s) |
| 974 | var replace = this.attr_('xValueFormatter')(this.lastx_, this) + ":"; |
| 975 | var fmtFunc = this.attr_('yValueFormatter'); |
| 976 | var clen = this.colors_.length; |
| 977 | |
| 978 | if (this.attr_('showLabelsOnHighlight')) { |
| 979 | // Set the status message to indicate the selected point(s) |
| 980 | for (var i = 0; i < this.selPoints_.length; i++) { |
| 981 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
| 982 | if (this.attr_("labelsSeparateLines")) { |
| 983 | replace += "<br/>"; |
| 984 | } |
| 985 | var point = this.selPoints_[i]; |
| 986 | var c = new RGBColor(this.colors_[i%clen]); |
| 987 | var yval = fmtFunc(point.yval); |
| 988 | replace += " <b><font color='" + c.toHex() + "'>" |
| 989 | + point.name + "</font></b>:" |
| 990 | + yval; |
| 991 | } |
| 992 | |
| 993 | this.attr_("labelsDiv").innerHTML = replace; |
| 994 | } |
| 995 | |
| 996 | // Draw colored circles over the center of each selected point |
| 997 | ctx.save(); |
| 998 | for (var i = 0; i < this.selPoints_.length; i++) { |
| 999 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
| 1000 | ctx.beginPath(); |
| 1001 | ctx.fillStyle = this.plotter_.colors[this.selPoints_[i].name]; |
| 1002 | ctx.arc(canvasx, this.selPoints_[i].canvasy, circleSize, |
| 1003 | 0, 2 * Math.PI, false); |
| 1004 | ctx.fill(); |
| 1005 | } |
| 1006 | ctx.restore(); |
| 1007 | |
| 1008 | this.previousVerticalX_ = canvasx; |
| 1009 | } |
| 1010 | }; |
| 1011 | |
| 1012 | /** |
| 1013 | * Set manually set selected dots, and display information about them |
| 1014 | * @param int row number that should by highlighted |
| 1015 | * false value clears the selection |
| 1016 | * @public |
| 1017 | */ |
| 1018 | Dygraph.prototype.setSelection = function(row) { |
| 1019 | // Extract the points we've selected |
| 1020 | this.selPoints_ = []; |
| 1021 | var pos = 0; |
| 1022 | |
| 1023 | if (row !== false) { |
| 1024 | row = row-this.boundaryIds_[0][0]; |
| 1025 | } |
| 1026 | |
| 1027 | if (row !== false && row >= 0) { |
| 1028 | for (var i in this.layout_.datasets) { |
| 1029 | if (row < this.layout_.datasets[i].length) { |
| 1030 | this.selPoints_.push(this.layout_.points[pos+row]); |
| 1031 | } |
| 1032 | pos += this.layout_.datasets[i].length; |
| 1033 | } |
| 1034 | } |
| 1035 | |
| 1036 | if (this.selPoints_.length) { |
| 1037 | this.lastx_ = this.selPoints_[0].xval; |
| 1038 | this.updateSelection_(); |
| 1039 | } else { |
| 1040 | this.lastx_ = -1; |
| 1041 | this.clearSelection(); |
| 1042 | } |
| 1043 | |
| 1044 | }; |
| 1045 | |
| 1046 | /** |
| 1047 | * The mouse has left the canvas. Clear out whatever artifacts remain |
| 1048 | * @param {Object} event the mouseout event from the browser. |
| 1049 | * @private |
| 1050 | */ |
| 1051 | Dygraph.prototype.mouseOut_ = function(event) { |
| 1052 | if (this.attr_("unhighlightCallback")) { |
| 1053 | this.attr_("unhighlightCallback")(event); |
| 1054 | } |
| 1055 | |
| 1056 | if (this.attr_("hideOverlayOnMouseOut")) { |
| 1057 | this.clearSelection(); |
| 1058 | } |
| 1059 | }; |
| 1060 | |
| 1061 | /** |
| 1062 | * Remove all selection from the canvas |
| 1063 | * @public |
| 1064 | */ |
| 1065 | Dygraph.prototype.clearSelection = function() { |
| 1066 | // Get rid of the overlay data |
| 1067 | var ctx = this.canvas_.getContext("2d"); |
| 1068 | ctx.clearRect(0, 0, this.width_, this.height_); |
| 1069 | this.attr_("labelsDiv").innerHTML = ""; |
| 1070 | this.selPoints_ = []; |
| 1071 | this.lastx_ = -1; |
| 1072 | } |
| 1073 | |
| 1074 | /** |
| 1075 | * Returns the number of the currently selected row |
| 1076 | * @return int row number, of -1 if nothing is selected |
| 1077 | * @public |
| 1078 | */ |
| 1079 | Dygraph.prototype.getSelection = function() { |
| 1080 | if (!this.selPoints_ || this.selPoints_.length < 1) { |
| 1081 | return -1; |
| 1082 | } |
| 1083 | |
| 1084 | for (var row=0; row<this.layout_.points.length; row++ ) { |
| 1085 | if (this.layout_.points[row].x == this.selPoints_[0].x) { |
| 1086 | return row + this.boundaryIds_[0][0]; |
| 1087 | } |
| 1088 | } |
| 1089 | return -1; |
| 1090 | } |
| 1091 | |
| 1092 | Dygraph.zeropad = function(x) { |
| 1093 | if (x < 10) return "0" + x; else return "" + x; |
| 1094 | } |
| 1095 | |
| 1096 | /** |
| 1097 | * Return a string version of the hours, minutes and seconds portion of a date. |
| 1098 | * @param {Number} date The JavaScript date (ms since epoch) |
| 1099 | * @return {String} A time of the form "HH:MM:SS" |
| 1100 | * @private |
| 1101 | */ |
| 1102 | Dygraph.hmsString_ = function(date) { |
| 1103 | var zeropad = Dygraph.zeropad; |
| 1104 | var d = new Date(date); |
| 1105 | if (d.getSeconds()) { |
| 1106 | return zeropad(d.getHours()) + ":" + |
| 1107 | zeropad(d.getMinutes()) + ":" + |
| 1108 | zeropad(d.getSeconds()); |
| 1109 | } else { |
| 1110 | return zeropad(d.getHours()) + ":" + zeropad(d.getMinutes()); |
| 1111 | } |
| 1112 | } |
| 1113 | |
| 1114 | /** |
| 1115 | * Convert a JS date to a string appropriate to display on an axis that |
| 1116 | * is displaying values at the stated granularity. |
| 1117 | * @param {Date} date The date to format |
| 1118 | * @param {Number} granularity One of the Dygraph granularity constants |
| 1119 | * @return {String} The formatted date |
| 1120 | * @private |
| 1121 | */ |
| 1122 | Dygraph.dateAxisFormatter = function(date, granularity) { |
| 1123 | if (granularity >= Dygraph.MONTHLY) { |
| 1124 | return date.strftime('%b %y'); |
| 1125 | } else { |
| 1126 | var frac = date.getHours() * 3600 + date.getMinutes() * 60 + date.getSeconds() + date.getMilliseconds(); |
| 1127 | if (frac == 0 || granularity >= Dygraph.DAILY) { |
| 1128 | return new Date(date.getTime() + 3600*1000).strftime('%d%b'); |
| 1129 | } else { |
| 1130 | return Dygraph.hmsString_(date.getTime()); |
| 1131 | } |
| 1132 | } |
| 1133 | } |
| 1134 | |
| 1135 | /** |
| 1136 | * Convert a JS date (millis since epoch) to YYYY/MM/DD |
| 1137 | * @param {Number} date The JavaScript date (ms since epoch) |
| 1138 | * @return {String} A date of the form "YYYY/MM/DD" |
| 1139 | * @private |
| 1140 | */ |
| 1141 | Dygraph.dateString_ = function(date, self) { |
| 1142 | var zeropad = Dygraph.zeropad; |
| 1143 | var d = new Date(date); |
| 1144 | |
| 1145 | // Get the year: |
| 1146 | var year = "" + d.getFullYear(); |
| 1147 | // Get a 0 padded month string |
| 1148 | var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh |
| 1149 | // Get a 0 padded day string |
| 1150 | var day = zeropad(d.getDate()); |
| 1151 | |
| 1152 | var ret = ""; |
| 1153 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); |
| 1154 | if (frac) ret = " " + Dygraph.hmsString_(date); |
| 1155 | |
| 1156 | return year + "/" + month + "/" + day + ret; |
| 1157 | }; |
| 1158 | |
| 1159 | /** |
| 1160 | * Round a number to the specified number of digits past the decimal point. |
| 1161 | * @param {Number} num The number to round |
| 1162 | * @param {Number} places The number of decimals to which to round |
| 1163 | * @return {Number} The rounded number |
| 1164 | * @private |
| 1165 | */ |
| 1166 | Dygraph.round_ = function(num, places) { |
| 1167 | var shift = Math.pow(10, places); |
| 1168 | return Math.round(num * shift)/shift; |
| 1169 | }; |
| 1170 | |
| 1171 | /** |
| 1172 | * Fires when there's data available to be graphed. |
| 1173 | * @param {String} data Raw CSV data to be plotted |
| 1174 | * @private |
| 1175 | */ |
| 1176 | Dygraph.prototype.loadedEvent_ = function(data) { |
| 1177 | this.rawData_ = this.parseCSV_(data); |
| 1178 | this.drawGraph_(this.rawData_); |
| 1179 | }; |
| 1180 | |
| 1181 | Dygraph.prototype.months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", |
| 1182 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]; |
| 1183 | Dygraph.prototype.quarters = ["Jan", "Apr", "Jul", "Oct"]; |
| 1184 | |
| 1185 | /** |
| 1186 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days |
| 1187 | * @private |
| 1188 | */ |
| 1189 | Dygraph.prototype.addXTicks_ = function() { |
| 1190 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
| 1191 | var startDate, endDate; |
| 1192 | if (this.dateWindow_) { |
| 1193 | startDate = this.dateWindow_[0]; |
| 1194 | endDate = this.dateWindow_[1]; |
| 1195 | } else { |
| 1196 | startDate = this.rawData_[0][0]; |
| 1197 | endDate = this.rawData_[this.rawData_.length - 1][0]; |
| 1198 | } |
| 1199 | |
| 1200 | var xTicks = this.attr_('xTicker')(startDate, endDate, this); |
| 1201 | this.layout_.updateOptions({xTicks: xTicks}); |
| 1202 | }; |
| 1203 | |
| 1204 | // Time granularity enumeration |
| 1205 | Dygraph.SECONDLY = 0; |
| 1206 | Dygraph.TWO_SECONDLY = 1; |
| 1207 | Dygraph.FIVE_SECONDLY = 2; |
| 1208 | Dygraph.TEN_SECONDLY = 3; |
| 1209 | Dygraph.THIRTY_SECONDLY = 4; |
| 1210 | Dygraph.MINUTELY = 5; |
| 1211 | Dygraph.TWO_MINUTELY = 6; |
| 1212 | Dygraph.FIVE_MINUTELY = 7; |
| 1213 | Dygraph.TEN_MINUTELY = 8; |
| 1214 | Dygraph.THIRTY_MINUTELY = 9; |
| 1215 | Dygraph.HOURLY = 10; |
| 1216 | Dygraph.TWO_HOURLY = 11; |
| 1217 | Dygraph.SIX_HOURLY = 12; |
| 1218 | Dygraph.DAILY = 13; |
| 1219 | Dygraph.WEEKLY = 14; |
| 1220 | Dygraph.MONTHLY = 15; |
| 1221 | Dygraph.QUARTERLY = 16; |
| 1222 | Dygraph.BIANNUAL = 17; |
| 1223 | Dygraph.ANNUAL = 18; |
| 1224 | Dygraph.DECADAL = 19; |
| 1225 | Dygraph.NUM_GRANULARITIES = 20; |
| 1226 | |
| 1227 | Dygraph.SHORT_SPACINGS = []; |
| 1228 | Dygraph.SHORT_SPACINGS[Dygraph.SECONDLY] = 1000 * 1; |
| 1229 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_SECONDLY] = 1000 * 2; |
| 1230 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_SECONDLY] = 1000 * 5; |
| 1231 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_SECONDLY] = 1000 * 10; |
| 1232 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_SECONDLY] = 1000 * 30; |
| 1233 | Dygraph.SHORT_SPACINGS[Dygraph.MINUTELY] = 1000 * 60; |
| 1234 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_MINUTELY] = 1000 * 60 * 2; |
| 1235 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_MINUTELY] = 1000 * 60 * 5; |
| 1236 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_MINUTELY] = 1000 * 60 * 10; |
| 1237 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_MINUTELY] = 1000 * 60 * 30; |
| 1238 | Dygraph.SHORT_SPACINGS[Dygraph.HOURLY] = 1000 * 3600; |
| 1239 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_HOURLY] = 1000 * 3600 * 2; |
| 1240 | Dygraph.SHORT_SPACINGS[Dygraph.SIX_HOURLY] = 1000 * 3600 * 6; |
| 1241 | Dygraph.SHORT_SPACINGS[Dygraph.DAILY] = 1000 * 86400; |
| 1242 | Dygraph.SHORT_SPACINGS[Dygraph.WEEKLY] = 1000 * 604800; |
| 1243 | |
| 1244 | // NumXTicks() |
| 1245 | // |
| 1246 | // If we used this time granularity, how many ticks would there be? |
| 1247 | // This is only an approximation, but it's generally good enough. |
| 1248 | // |
| 1249 | Dygraph.prototype.NumXTicks = function(start_time, end_time, granularity) { |
| 1250 | if (granularity < Dygraph.MONTHLY) { |
| 1251 | // Generate one tick mark for every fixed interval of time. |
| 1252 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
| 1253 | return Math.floor(0.5 + 1.0 * (end_time - start_time) / spacing); |
| 1254 | } else { |
| 1255 | var year_mod = 1; // e.g. to only print one point every 10 years. |
| 1256 | var num_months = 12; |
| 1257 | if (granularity == Dygraph.QUARTERLY) num_months = 3; |
| 1258 | if (granularity == Dygraph.BIANNUAL) num_months = 2; |
| 1259 | if (granularity == Dygraph.ANNUAL) num_months = 1; |
| 1260 | if (granularity == Dygraph.DECADAL) { num_months = 1; year_mod = 10; } |
| 1261 | |
| 1262 | var msInYear = 365.2524 * 24 * 3600 * 1000; |
| 1263 | var num_years = 1.0 * (end_time - start_time) / msInYear; |
| 1264 | return Math.floor(0.5 + 1.0 * num_years * num_months / year_mod); |
| 1265 | } |
| 1266 | }; |
| 1267 | |
| 1268 | // GetXAxis() |
| 1269 | // |
| 1270 | // Construct an x-axis of nicely-formatted times on meaningful boundaries |
| 1271 | // (e.g. 'Jan 09' rather than 'Jan 22, 2009'). |
| 1272 | // |
| 1273 | // Returns an array containing {v: millis, label: label} dictionaries. |
| 1274 | // |
| 1275 | Dygraph.prototype.GetXAxis = function(start_time, end_time, granularity) { |
| 1276 | var formatter = this.attr_("xAxisLabelFormatter"); |
| 1277 | var ticks = []; |
| 1278 | if (granularity < Dygraph.MONTHLY) { |
| 1279 | // Generate one tick mark for every fixed interval of time. |
| 1280 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
| 1281 | var format = '%d%b'; // e.g. "1Jan" |
| 1282 | |
| 1283 | // Find a time less than start_time which occurs on a "nice" time boundary |
| 1284 | // for this granularity. |
| 1285 | var g = spacing / 1000; |
| 1286 | var d = new Date(start_time); |
| 1287 | if (g <= 60) { // seconds |
| 1288 | var x = d.getSeconds(); d.setSeconds(x - x % g); |
| 1289 | } else { |
| 1290 | d.setSeconds(0); |
| 1291 | g /= 60; |
| 1292 | if (g <= 60) { // minutes |
| 1293 | var x = d.getMinutes(); d.setMinutes(x - x % g); |
| 1294 | } else { |
| 1295 | d.setMinutes(0); |
| 1296 | g /= 60; |
| 1297 | |
| 1298 | if (g <= 24) { // days |
| 1299 | var x = d.getHours(); d.setHours(x - x % g); |
| 1300 | } else { |
| 1301 | d.setHours(0); |
| 1302 | g /= 24; |
| 1303 | |
| 1304 | if (g == 7) { // one week |
| 1305 | d.setDate(d.getDate() - d.getDay()); |
| 1306 | } |
| 1307 | } |
| 1308 | } |
| 1309 | } |
| 1310 | start_time = d.getTime(); |
| 1311 | |
| 1312 | for (var t = start_time; t <= end_time; t += spacing) { |
| 1313 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
| 1314 | } |
| 1315 | } else { |
| 1316 | // Display a tick mark on the first of a set of months of each year. |
| 1317 | // Years get a tick mark iff y % year_mod == 0. This is useful for |
| 1318 | // displaying a tick mark once every 10 years, say, on long time scales. |
| 1319 | var months; |
| 1320 | var year_mod = 1; // e.g. to only print one point every 10 years. |
| 1321 | |
| 1322 | if (granularity == Dygraph.MONTHLY) { |
| 1323 | months = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ]; |
| 1324 | } else if (granularity == Dygraph.QUARTERLY) { |
| 1325 | months = [ 0, 3, 6, 9 ]; |
| 1326 | } else if (granularity == Dygraph.BIANNUAL) { |
| 1327 | months = [ 0, 6 ]; |
| 1328 | } else if (granularity == Dygraph.ANNUAL) { |
| 1329 | months = [ 0 ]; |
| 1330 | } else if (granularity == Dygraph.DECADAL) { |
| 1331 | months = [ 0 ]; |
| 1332 | year_mod = 10; |
| 1333 | } |
| 1334 | |
| 1335 | var start_year = new Date(start_time).getFullYear(); |
| 1336 | var end_year = new Date(end_time).getFullYear(); |
| 1337 | var zeropad = Dygraph.zeropad; |
| 1338 | for (var i = start_year; i <= end_year; i++) { |
| 1339 | if (i % year_mod != 0) continue; |
| 1340 | for (var j = 0; j < months.length; j++) { |
| 1341 | var date_str = i + "/" + zeropad(1 + months[j]) + "/01"; |
| 1342 | var t = Date.parse(date_str); |
| 1343 | if (t < start_time || t > end_time) continue; |
| 1344 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
| 1345 | } |
| 1346 | } |
| 1347 | } |
| 1348 | |
| 1349 | return ticks; |
| 1350 | }; |
| 1351 | |
| 1352 | |
| 1353 | /** |
| 1354 | * Add ticks to the x-axis based on a date range. |
| 1355 | * @param {Number} startDate Start of the date window (millis since epoch) |
| 1356 | * @param {Number} endDate End of the date window (millis since epoch) |
| 1357 | * @return {Array.<Object>} Array of {label, value} tuples. |
| 1358 | * @public |
| 1359 | */ |
| 1360 | Dygraph.dateTicker = function(startDate, endDate, self) { |
| 1361 | var chosen = -1; |
| 1362 | for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) { |
| 1363 | var num_ticks = self.NumXTicks(startDate, endDate, i); |
| 1364 | if (self.width_ / num_ticks >= self.attr_('pixelsPerXLabel')) { |
| 1365 | chosen = i; |
| 1366 | break; |
| 1367 | } |
| 1368 | } |
| 1369 | |
| 1370 | if (chosen >= 0) { |
| 1371 | return self.GetXAxis(startDate, endDate, chosen); |
| 1372 | } else { |
| 1373 | // TODO(danvk): signal error. |
| 1374 | } |
| 1375 | }; |
| 1376 | |
| 1377 | /** |
| 1378 | * Add ticks when the x axis has numbers on it (instead of dates) |
| 1379 | * @param {Number} startDate Start of the date window (millis since epoch) |
| 1380 | * @param {Number} endDate End of the date window (millis since epoch) |
| 1381 | * @return {Array.<Object>} Array of {label, value} tuples. |
| 1382 | * @public |
| 1383 | */ |
| 1384 | Dygraph.numericTicks = function(minV, maxV, self) { |
| 1385 | // Basic idea: |
| 1386 | // Try labels every 1, 2, 5, 10, 20, 50, 100, etc. |
| 1387 | // Calculate the resulting tick spacing (i.e. this.height_ / nTicks). |
| 1388 | // The first spacing greater than pixelsPerYLabel is what we use. |
| 1389 | // TODO(danvk): version that works on a log scale. |
| 1390 | if (self.attr_("labelsKMG2")) { |
| 1391 | var mults = [1, 2, 4, 8]; |
| 1392 | } else { |
| 1393 | var mults = [1, 2, 5]; |
| 1394 | } |
| 1395 | var scale, low_val, high_val, nTicks; |
| 1396 | // TODO(danvk): make it possible to set this for x- and y-axes independently. |
| 1397 | var pixelsPerTick = self.attr_('pixelsPerYLabel'); |
| 1398 | for (var i = -10; i < 50; i++) { |
| 1399 | if (self.attr_("labelsKMG2")) { |
| 1400 | var base_scale = Math.pow(16, i); |
| 1401 | } else { |
| 1402 | var base_scale = Math.pow(10, i); |
| 1403 | } |
| 1404 | for (var j = 0; j < mults.length; j++) { |
| 1405 | scale = base_scale * mults[j]; |
| 1406 | low_val = Math.floor(minV / scale) * scale; |
| 1407 | high_val = Math.ceil(maxV / scale) * scale; |
| 1408 | nTicks = Math.abs(high_val - low_val) / scale; |
| 1409 | var spacing = self.height_ / nTicks; |
| 1410 | // wish I could break out of both loops at once... |
| 1411 | if (spacing > pixelsPerTick) break; |
| 1412 | } |
| 1413 | if (spacing > pixelsPerTick) break; |
| 1414 | } |
| 1415 | |
| 1416 | // Construct labels for the ticks |
| 1417 | var ticks = []; |
| 1418 | var k; |
| 1419 | var k_labels = []; |
| 1420 | if (self.attr_("labelsKMB")) { |
| 1421 | k = 1000; |
| 1422 | k_labels = [ "K", "M", "B", "T" ]; |
| 1423 | } |
| 1424 | if (self.attr_("labelsKMG2")) { |
| 1425 | if (k) self.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); |
| 1426 | k = 1024; |
| 1427 | k_labels = [ "k", "M", "G", "T" ]; |
| 1428 | } |
| 1429 | |
| 1430 | // Allow reverse y-axis if it's explicitly requested. |
| 1431 | if (low_val > high_val) scale *= -1; |
| 1432 | |
| 1433 | for (var i = 0; i < nTicks; i++) { |
| 1434 | var tickV = low_val + i * scale; |
| 1435 | var absTickV = Math.abs(tickV); |
| 1436 | var label = Dygraph.round_(tickV, 2); |
| 1437 | if (k_labels.length) { |
| 1438 | // Round up to an appropriate unit. |
| 1439 | var n = k*k*k*k; |
| 1440 | for (var j = 3; j >= 0; j--, n /= k) { |
| 1441 | if (absTickV >= n) { |
| 1442 | label = Dygraph.round_(tickV / n, 1) + k_labels[j]; |
| 1443 | break; |
| 1444 | } |
| 1445 | } |
| 1446 | } |
| 1447 | ticks.push( {label: label, v: tickV} ); |
| 1448 | } |
| 1449 | return ticks; |
| 1450 | }; |
| 1451 | |
| 1452 | /** |
| 1453 | * Adds appropriate ticks on the y-axis |
| 1454 | * @param {Number} minY The minimum Y value in the data set |
| 1455 | * @param {Number} maxY The maximum Y value in the data set |
| 1456 | * @private |
| 1457 | */ |
| 1458 | Dygraph.prototype.addYTicks_ = function(minY, maxY) { |
| 1459 | // Set the number of ticks so that the labels are human-friendly. |
| 1460 | // TODO(danvk): make this an attribute as well. |
| 1461 | var ticks = Dygraph.numericTicks(minY, maxY, this); |
| 1462 | this.layout_.updateOptions( { yAxis: [minY, maxY], |
| 1463 | yTicks: ticks } ); |
| 1464 | }; |
| 1465 | |
| 1466 | // Computes the range of the data series (including confidence intervals). |
| 1467 | // series is either [ [x1, y1], [x2, y2], ... ] or |
| 1468 | // [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... |
| 1469 | // Returns [low, high] |
| 1470 | Dygraph.prototype.extremeValues_ = function(series) { |
| 1471 | var minY = null, maxY = null; |
| 1472 | |
| 1473 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
| 1474 | if (bars) { |
| 1475 | // With custom bars, maxY is the max of the high values. |
| 1476 | for (var j = 0; j < series.length; j++) { |
| 1477 | var y = series[j][1][0]; |
| 1478 | if (!y) continue; |
| 1479 | var low = y - series[j][1][1]; |
| 1480 | var high = y + series[j][1][2]; |
| 1481 | if (low > y) low = y; // this can happen with custom bars, |
| 1482 | if (high < y) high = y; // e.g. in tests/custom-bars.html |
| 1483 | if (maxY == null || high > maxY) { |
| 1484 | maxY = high; |
| 1485 | } |
| 1486 | if (minY == null || low < minY) { |
| 1487 | minY = low; |
| 1488 | } |
| 1489 | } |
| 1490 | } else { |
| 1491 | for (var j = 0; j < series.length; j++) { |
| 1492 | var y = series[j][1]; |
| 1493 | if (y === null || isNaN(y)) continue; |
| 1494 | if (maxY == null || y > maxY) { |
| 1495 | maxY = y; |
| 1496 | } |
| 1497 | if (minY == null || y < minY) { |
| 1498 | minY = y; |
| 1499 | } |
| 1500 | } |
| 1501 | } |
| 1502 | |
| 1503 | return [minY, maxY]; |
| 1504 | }; |
| 1505 | |
| 1506 | /** |
| 1507 | * Update the graph with new data. Data is in the format |
| 1508 | * [ [date1, val1, val2, ...], [date2, val1, val2, ...] if errorBars=false |
| 1509 | * or, if errorBars=true, |
| 1510 | * [ [date1, [val1,stddev1], [val2,stddev2], ...], [date2, ...], ...] |
| 1511 | * @param {Array.<Object>} data The data (see above) |
| 1512 | * @private |
| 1513 | */ |
| 1514 | Dygraph.prototype.drawGraph_ = function(data) { |
| 1515 | // This is used to set the second parameter to drawCallback, below. |
| 1516 | var is_initial_draw = this.is_initial_draw_; |
| 1517 | this.is_initial_draw_ = false; |
| 1518 | |
| 1519 | var minY = null, maxY = null; |
| 1520 | this.layout_.removeAllDatasets(); |
| 1521 | this.setColors_(); |
| 1522 | this.attrs_['pointSize'] = 0.5 * this.attr_('highlightCircleSize'); |
| 1523 | |
| 1524 | var connectSeparatedPoints = this.attr_('connectSeparatedPoints'); |
| 1525 | |
| 1526 | // Loop over the fields (series). Go from the last to the first, |
| 1527 | // because if they're stacked that's how we accumulate the values. |
| 1528 | |
| 1529 | var cumulative_y = []; // For stacked series. |
| 1530 | var datasets = []; |
| 1531 | |
| 1532 | // Loop over all fields and create datasets |
| 1533 | for (var i = data[0].length - 1; i >= 1; i--) { |
| 1534 | if (!this.visibility()[i - 1]) continue; |
| 1535 | |
| 1536 | var series = []; |
| 1537 | for (var j = 0; j < data.length; j++) { |
| 1538 | if (data[j][i] != null || !connectSeparatedPoints) { |
| 1539 | var date = data[j][0]; |
| 1540 | series.push([date, data[j][i]]); |
| 1541 | } |
| 1542 | } |
| 1543 | series = this.rollingAverage(series, this.rollPeriod_); |
| 1544 | |
| 1545 | // Prune down to the desired range, if necessary (for zooming) |
| 1546 | // Because there can be lines going to points outside of the visible area, |
| 1547 | // we actually prune to visible points, plus one on either side. |
| 1548 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
| 1549 | if (this.dateWindow_) { |
| 1550 | var low = this.dateWindow_[0]; |
| 1551 | var high= this.dateWindow_[1]; |
| 1552 | var pruned = []; |
| 1553 | // TODO(danvk): do binary search instead of linear search. |
| 1554 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. |
| 1555 | var firstIdx = null, lastIdx = null; |
| 1556 | for (var k = 0; k < series.length; k++) { |
| 1557 | if (series[k][0] >= low && firstIdx === null) { |
| 1558 | firstIdx = k; |
| 1559 | } |
| 1560 | if (series[k][0] <= high) { |
| 1561 | lastIdx = k; |
| 1562 | } |
| 1563 | } |
| 1564 | if (firstIdx === null) firstIdx = 0; |
| 1565 | if (firstIdx > 0) firstIdx--; |
| 1566 | if (lastIdx === null) lastIdx = series.length - 1; |
| 1567 | if (lastIdx < series.length - 1) lastIdx++; |
| 1568 | this.boundaryIds_[i-1] = [firstIdx, lastIdx]; |
| 1569 | for (var k = firstIdx; k <= lastIdx; k++) { |
| 1570 | pruned.push(series[k]); |
| 1571 | } |
| 1572 | series = pruned; |
| 1573 | } else { |
| 1574 | this.boundaryIds_[i-1] = [0, series.length-1]; |
| 1575 | } |
| 1576 | |
| 1577 | var extremes = this.extremeValues_(series); |
| 1578 | var thisMinY = extremes[0]; |
| 1579 | var thisMaxY = extremes[1]; |
| 1580 | if (minY === null || thisMinY < minY) minY = thisMinY; |
| 1581 | if (maxY === null || thisMaxY > maxY) maxY = thisMaxY; |
| 1582 | |
| 1583 | if (bars) { |
| 1584 | for (var j=0; j<series.length; j++) { |
| 1585 | val = [series[j][0], series[j][1][0], series[j][1][1], series[j][1][2]]; |
| 1586 | series[j] = val; |
| 1587 | } |
| 1588 | } else if (this.attr_("stackedGraph")) { |
| 1589 | var l = series.length; |
| 1590 | var actual_y; |
| 1591 | for (var j = 0; j < l; j++) { |
| 1592 | // If one data set has a NaN, let all subsequent stacked |
| 1593 | // sets inherit the NaN -- only start at 0 for the first set. |
| 1594 | var x = series[j][0]; |
| 1595 | if (cumulative_y[x] === undefined) |
| 1596 | cumulative_y[x] = 0; |
| 1597 | |
| 1598 | actual_y = series[j][1]; |
| 1599 | cumulative_y[x] += actual_y; |
| 1600 | |
| 1601 | series[j] = [x, cumulative_y[x]] |
| 1602 | |
| 1603 | if (!maxY || cumulative_y[x] > maxY) |
| 1604 | maxY = cumulative_y[x]; |
| 1605 | } |
| 1606 | } |
| 1607 | |
| 1608 | datasets[i] = series; |
| 1609 | } |
| 1610 | |
| 1611 | for (var i = 1; i < datasets.length; i++) { |
| 1612 | this.layout_.addDataset(this.attr_("labels")[i], datasets[i]); |
| 1613 | } |
| 1614 | |
| 1615 | // Use some heuristics to come up with a good maxY value, unless it's been |
| 1616 | // set explicitly by the user. |
| 1617 | if (this.valueRange_ != null) { |
| 1618 | this.addYTicks_(this.valueRange_[0], this.valueRange_[1]); |
| 1619 | this.displayedYRange_ = this.valueRange_; |
| 1620 | } else { |
| 1621 | // This affects the calculation of span, below. |
| 1622 | if (this.attr_("includeZero") && minY > 0) { |
| 1623 | minY = 0; |
| 1624 | } |
| 1625 | |
| 1626 | // Add some padding and round up to an integer to be human-friendly. |
| 1627 | var span = maxY - minY; |
| 1628 | // special case: if we have no sense of scale, use +/-10% of the sole value. |
| 1629 | if (span == 0) { span = maxY; } |
| 1630 | var maxAxisY = maxY + 0.1 * span; |
| 1631 | var minAxisY = minY - 0.1 * span; |
| 1632 | |
| 1633 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. |
| 1634 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; |
| 1635 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; |
| 1636 | |
| 1637 | if (this.attr_("includeZero")) { |
| 1638 | if (maxY < 0) maxAxisY = 0; |
| 1639 | if (minY > 0) minAxisY = 0; |
| 1640 | } |
| 1641 | |
| 1642 | this.addYTicks_(minAxisY, maxAxisY); |
| 1643 | this.displayedYRange_ = [minAxisY, maxAxisY]; |
| 1644 | } |
| 1645 | |
| 1646 | this.addXTicks_(); |
| 1647 | |
| 1648 | // Tell PlotKit to use this new data and render itself |
| 1649 | this.layout_.updateOptions({dateWindow: this.dateWindow_}); |
| 1650 | this.layout_.evaluateWithError(); |
| 1651 | this.plotter_.clear(); |
| 1652 | this.plotter_.render(); |
| 1653 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
| 1654 | this.canvas_.height); |
| 1655 | |
| 1656 | if (this.attr_("drawCallback") !== null) { |
| 1657 | this.attr_("drawCallback")(this, is_initial_draw); |
| 1658 | } |
| 1659 | }; |
| 1660 | |
| 1661 | /** |
| 1662 | * Calculates the rolling average of a data set. |
| 1663 | * If originalData is [label, val], rolls the average of those. |
| 1664 | * If originalData is [label, [, it's interpreted as [value, stddev] |
| 1665 | * and the roll is returned in the same form, with appropriately reduced |
| 1666 | * stddev for each value. |
| 1667 | * Note that this is where fractional input (i.e. '5/10') is converted into |
| 1668 | * decimal values. |
| 1669 | * @param {Array} originalData The data in the appropriate format (see above) |
| 1670 | * @param {Number} rollPeriod The number of days over which to average the data |
| 1671 | */ |
| 1672 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
| 1673 | if (originalData.length < 2) |
| 1674 | return originalData; |
| 1675 | var rollPeriod = Math.min(rollPeriod, originalData.length - 1); |
| 1676 | var rollingData = []; |
| 1677 | var sigma = this.attr_("sigma"); |
| 1678 | |
| 1679 | if (this.fractions_) { |
| 1680 | var num = 0; |
| 1681 | var den = 0; // numerator/denominator |
| 1682 | var mult = 100.0; |
| 1683 | for (var i = 0; i < originalData.length; i++) { |
| 1684 | num += originalData[i][1][0]; |
| 1685 | den += originalData[i][1][1]; |
| 1686 | if (i - rollPeriod >= 0) { |
| 1687 | num -= originalData[i - rollPeriod][1][0]; |
| 1688 | den -= originalData[i - rollPeriod][1][1]; |
| 1689 | } |
| 1690 | |
| 1691 | var date = originalData[i][0]; |
| 1692 | var value = den ? num / den : 0.0; |
| 1693 | if (this.attr_("errorBars")) { |
| 1694 | if (this.wilsonInterval_) { |
| 1695 | // For more details on this confidence interval, see: |
| 1696 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval |
| 1697 | if (den) { |
| 1698 | var p = value < 0 ? 0 : value, n = den; |
| 1699 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); |
| 1700 | var denom = 1 + sigma * sigma / den; |
| 1701 | var low = (p + sigma * sigma / (2 * den) - pm) / denom; |
| 1702 | var high = (p + sigma * sigma / (2 * den) + pm) / denom; |
| 1703 | rollingData[i] = [date, |
| 1704 | [p * mult, (p - low) * mult, (high - p) * mult]]; |
| 1705 | } else { |
| 1706 | rollingData[i] = [date, [0, 0, 0]]; |
| 1707 | } |
| 1708 | } else { |
| 1709 | var stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; |
| 1710 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; |
| 1711 | } |
| 1712 | } else { |
| 1713 | rollingData[i] = [date, mult * value]; |
| 1714 | } |
| 1715 | } |
| 1716 | } else if (this.attr_("customBars")) { |
| 1717 | var low = 0; |
| 1718 | var mid = 0; |
| 1719 | var high = 0; |
| 1720 | var count = 0; |
| 1721 | for (var i = 0; i < originalData.length; i++) { |
| 1722 | var data = originalData[i][1]; |
| 1723 | var y = data[1]; |
| 1724 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; |
| 1725 | |
| 1726 | if (y != null && !isNaN(y)) { |
| 1727 | low += data[0]; |
| 1728 | mid += y; |
| 1729 | high += data[2]; |
| 1730 | count += 1; |
| 1731 | } |
| 1732 | if (i - rollPeriod >= 0) { |
| 1733 | var prev = originalData[i - rollPeriod]; |
| 1734 | if (prev[1][1] != null && !isNaN(prev[1][1])) { |
| 1735 | low -= prev[1][0]; |
| 1736 | mid -= prev[1][1]; |
| 1737 | high -= prev[1][2]; |
| 1738 | count -= 1; |
| 1739 | } |
| 1740 | } |
| 1741 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, |
| 1742 | 1.0 * (mid - low) / count, |
| 1743 | 1.0 * (high - mid) / count ]]; |
| 1744 | } |
| 1745 | } else { |
| 1746 | // Calculate the rolling average for the first rollPeriod - 1 points where |
| 1747 | // there is not enough data to roll over the full number of days |
| 1748 | var num_init_points = Math.min(rollPeriod - 1, originalData.length - 2); |
| 1749 | if (!this.attr_("errorBars")){ |
| 1750 | if (rollPeriod == 1) { |
| 1751 | return originalData; |
| 1752 | } |
| 1753 | |
| 1754 | for (var i = 0; i < originalData.length; i++) { |
| 1755 | var sum = 0; |
| 1756 | var num_ok = 0; |
| 1757 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
| 1758 | var y = originalData[j][1]; |
| 1759 | if (y == null || isNaN(y)) continue; |
| 1760 | num_ok++; |
| 1761 | sum += originalData[j][1]; |
| 1762 | } |
| 1763 | if (num_ok) { |
| 1764 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
| 1765 | } else { |
| 1766 | rollingData[i] = [originalData[i][0], null]; |
| 1767 | } |
| 1768 | } |
| 1769 | |
| 1770 | } else { |
| 1771 | for (var i = 0; i < originalData.length; i++) { |
| 1772 | var sum = 0; |
| 1773 | var variance = 0; |
| 1774 | var num_ok = 0; |
| 1775 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
| 1776 | var y = originalData[j][1][0]; |
| 1777 | if (y == null || isNaN(y)) continue; |
| 1778 | num_ok++; |
| 1779 | sum += originalData[j][1][0]; |
| 1780 | variance += Math.pow(originalData[j][1][1], 2); |
| 1781 | } |
| 1782 | if (num_ok) { |
| 1783 | var stddev = Math.sqrt(variance) / num_ok; |
| 1784 | rollingData[i] = [originalData[i][0], |
| 1785 | [sum / num_ok, sigma * stddev, sigma * stddev]]; |
| 1786 | } else { |
| 1787 | rollingData[i] = [originalData[i][0], [null, null, null]]; |
| 1788 | } |
| 1789 | } |
| 1790 | } |
| 1791 | } |
| 1792 | |
| 1793 | return rollingData; |
| 1794 | }; |
| 1795 | |
| 1796 | /** |
| 1797 | * Parses a date, returning the number of milliseconds since epoch. This can be |
| 1798 | * passed in as an xValueParser in the Dygraph constructor. |
| 1799 | * TODO(danvk): enumerate formats that this understands. |
| 1800 | * @param {String} A date in YYYYMMDD format. |
| 1801 | * @return {Number} Milliseconds since epoch. |
| 1802 | * @public |
| 1803 | */ |
| 1804 | Dygraph.dateParser = function(dateStr, self) { |
| 1805 | var dateStrSlashed; |
| 1806 | var d; |
| 1807 | if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12' |
| 1808 | dateStrSlashed = dateStr.replace("-", "/", "g"); |
| 1809 | while (dateStrSlashed.search("-") != -1) { |
| 1810 | dateStrSlashed = dateStrSlashed.replace("-", "/"); |
| 1811 | } |
| 1812 | d = Date.parse(dateStrSlashed); |
| 1813 | } else if (dateStr.length == 8) { // e.g. '20090712' |
| 1814 | // TODO(danvk): remove support for this format. It's confusing. |
| 1815 | dateStrSlashed = dateStr.substr(0,4) + "/" + dateStr.substr(4,2) |
| 1816 | + "/" + dateStr.substr(6,2); |
| 1817 | d = Date.parse(dateStrSlashed); |
| 1818 | } else { |
| 1819 | // Any format that Date.parse will accept, e.g. "2009/07/12" or |
| 1820 | // "2009/07/12 12:34:56" |
| 1821 | d = Date.parse(dateStr); |
| 1822 | } |
| 1823 | |
| 1824 | if (!d || isNaN(d)) { |
| 1825 | self.error("Couldn't parse " + dateStr + " as a date"); |
| 1826 | } |
| 1827 | return d; |
| 1828 | }; |
| 1829 | |
| 1830 | /** |
| 1831 | * Detects the type of the str (date or numeric) and sets the various |
| 1832 | * formatting attributes in this.attrs_ based on this type. |
| 1833 | * @param {String} str An x value. |
| 1834 | * @private |
| 1835 | */ |
| 1836 | Dygraph.prototype.detectTypeFromString_ = function(str) { |
| 1837 | var isDate = false; |
| 1838 | if (str.indexOf('-') >= 0 || |
| 1839 | str.indexOf('/') >= 0 || |
| 1840 | isNaN(parseFloat(str))) { |
| 1841 | isDate = true; |
| 1842 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { |
| 1843 | // TODO(danvk): remove support for this format. |
| 1844 | isDate = true; |
| 1845 | } |
| 1846 | |
| 1847 | if (isDate) { |
| 1848 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
| 1849 | this.attrs_.xValueParser = Dygraph.dateParser; |
| 1850 | this.attrs_.xTicker = Dygraph.dateTicker; |
| 1851 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
| 1852 | } else { |
| 1853 | this.attrs_.xValueFormatter = function(x) { return x; }; |
| 1854 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
| 1855 | this.attrs_.xTicker = Dygraph.numericTicks; |
| 1856 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
| 1857 | } |
| 1858 | }; |
| 1859 | |
| 1860 | /** |
| 1861 | * Parses a string in a special csv format. We expect a csv file where each |
| 1862 | * line is a date point, and the first field in each line is the date string. |
| 1863 | * We also expect that all remaining fields represent series. |
| 1864 | * if the errorBars attribute is set, then interpret the fields as: |
| 1865 | * date, series1, stddev1, series2, stddev2, ... |
| 1866 | * @param {Array.<Object>} data See above. |
| 1867 | * @private |
| 1868 | * |
| 1869 | * @return Array.<Object> An array with one entry for each row. These entries |
| 1870 | * are an array of cells in that row. The first entry is the parsed x-value for |
| 1871 | * the row. The second, third, etc. are the y-values. These can take on one of |
| 1872 | * three forms, depending on the CSV and constructor parameters: |
| 1873 | * 1. numeric value |
| 1874 | * 2. [ value, stddev ] |
| 1875 | * 3. [ low value, center value, high value ] |
| 1876 | */ |
| 1877 | Dygraph.prototype.parseCSV_ = function(data) { |
| 1878 | var ret = []; |
| 1879 | var lines = data.split("\n"); |
| 1880 | |
| 1881 | // Use the default delimiter or fall back to a tab if that makes sense. |
| 1882 | var delim = this.attr_('delimiter'); |
| 1883 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { |
| 1884 | delim = '\t'; |
| 1885 | } |
| 1886 | |
| 1887 | var start = 0; |
| 1888 | if (this.labelsFromCSV_) { |
| 1889 | start = 1; |
| 1890 | this.attrs_.labels = lines[0].split(delim); |
| 1891 | } |
| 1892 | |
| 1893 | var xParser; |
| 1894 | var defaultParserSet = false; // attempt to auto-detect x value type |
| 1895 | var expectedCols = this.attr_("labels").length; |
| 1896 | var outOfOrder = false; |
| 1897 | for (var i = start; i < lines.length; i++) { |
| 1898 | var line = lines[i]; |
| 1899 | if (line.length == 0) continue; // skip blank lines |
| 1900 | if (line[0] == '#') continue; // skip comment lines |
| 1901 | var inFields = line.split(delim); |
| 1902 | if (inFields.length < 2) continue; |
| 1903 | |
| 1904 | var fields = []; |
| 1905 | if (!defaultParserSet) { |
| 1906 | this.detectTypeFromString_(inFields[0]); |
| 1907 | xParser = this.attr_("xValueParser"); |
| 1908 | defaultParserSet = true; |
| 1909 | } |
| 1910 | fields[0] = xParser(inFields[0], this); |
| 1911 | |
| 1912 | // If fractions are expected, parse the numbers as "A/B" |
| 1913 | if (this.fractions_) { |
| 1914 | for (var j = 1; j < inFields.length; j++) { |
| 1915 | // TODO(danvk): figure out an appropriate way to flag parse errors. |
| 1916 | var vals = inFields[j].split("/"); |
| 1917 | fields[j] = [parseFloat(vals[0]), parseFloat(vals[1])]; |
| 1918 | } |
| 1919 | } else if (this.attr_("errorBars")) { |
| 1920 | // If there are error bars, values are (value, stddev) pairs |
| 1921 | for (var j = 1; j < inFields.length; j += 2) |
| 1922 | fields[(j + 1) / 2] = [parseFloat(inFields[j]), |
| 1923 | parseFloat(inFields[j + 1])]; |
| 1924 | } else if (this.attr_("customBars")) { |
| 1925 | // Bars are a low;center;high tuple |
| 1926 | for (var j = 1; j < inFields.length; j++) { |
| 1927 | var vals = inFields[j].split(";"); |
| 1928 | fields[j] = [ parseFloat(vals[0]), |
| 1929 | parseFloat(vals[1]), |
| 1930 | parseFloat(vals[2]) ]; |
| 1931 | } |
| 1932 | } else { |
| 1933 | // Values are just numbers |
| 1934 | for (var j = 1; j < inFields.length; j++) { |
| 1935 | fields[j] = parseFloat(inFields[j]); |
| 1936 | } |
| 1937 | } |
| 1938 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
| 1939 | outOfOrder = true; |
| 1940 | } |
| 1941 | ret.push(fields); |
| 1942 | |
| 1943 | if (fields.length != expectedCols) { |
| 1944 | this.error("Number of columns in line " + i + " (" + fields.length + |
| 1945 | ") does not agree with number of labels (" + expectedCols + |
| 1946 | ") " + line); |
| 1947 | } |
| 1948 | } |
| 1949 | |
| 1950 | if (outOfOrder) { |
| 1951 | this.warn("CSV is out of order; order it correctly to speed loading."); |
| 1952 | ret.sort(function(a,b) { return a[0] - b[0] }); |
| 1953 | } |
| 1954 | |
| 1955 | return ret; |
| 1956 | }; |
| 1957 | |
| 1958 | /** |
| 1959 | * The user has provided their data as a pre-packaged JS array. If the x values |
| 1960 | * are numeric, this is the same as dygraphs' internal format. If the x values |
| 1961 | * are dates, we need to convert them from Date objects to ms since epoch. |
| 1962 | * @param {Array.<Object>} data |
| 1963 | * @return {Array.<Object>} data with numeric x values. |
| 1964 | */ |
| 1965 | Dygraph.prototype.parseArray_ = function(data) { |
| 1966 | // Peek at the first x value to see if it's numeric. |
| 1967 | if (data.length == 0) { |
| 1968 | this.error("Can't plot empty data set"); |
| 1969 | return null; |
| 1970 | } |
| 1971 | if (data[0].length == 0) { |
| 1972 | this.error("Data set cannot contain an empty row"); |
| 1973 | return null; |
| 1974 | } |
| 1975 | |
| 1976 | if (this.attr_("labels") == null) { |
| 1977 | this.warn("Using default labels. Set labels explicitly via 'labels' " + |
| 1978 | "in the options parameter"); |
| 1979 | this.attrs_.labels = [ "X" ]; |
| 1980 | for (var i = 1; i < data[0].length; i++) { |
| 1981 | this.attrs_.labels.push("Y" + i); |
| 1982 | } |
| 1983 | } |
| 1984 | |
| 1985 | if (Dygraph.isDateLike(data[0][0])) { |
| 1986 | // Some intelligent defaults for a date x-axis. |
| 1987 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
| 1988 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
| 1989 | this.attrs_.xTicker = Dygraph.dateTicker; |
| 1990 | |
| 1991 | // Assume they're all dates. |
| 1992 | var parsedData = Dygraph.clone(data); |
| 1993 | for (var i = 0; i < data.length; i++) { |
| 1994 | if (parsedData[i].length == 0) { |
| 1995 | this.error("Row " << (1 + i) << " of data is empty"); |
| 1996 | return null; |
| 1997 | } |
| 1998 | if (parsedData[i][0] == null |
| 1999 | || typeof(parsedData[i][0].getTime) != 'function' |
| 2000 | || isNaN(parsedData[i][0].getTime())) { |
| 2001 | this.error("x value in row " + (1 + i) + " is not a Date"); |
| 2002 | return null; |
| 2003 | } |
| 2004 | parsedData[i][0] = parsedData[i][0].getTime(); |
| 2005 | } |
| 2006 | return parsedData; |
| 2007 | } else { |
| 2008 | // Some intelligent defaults for a numeric x-axis. |
| 2009 | this.attrs_.xValueFormatter = function(x) { return x; }; |
| 2010 | this.attrs_.xTicker = Dygraph.numericTicks; |
| 2011 | return data; |
| 2012 | } |
| 2013 | }; |
| 2014 | |
| 2015 | /** |
| 2016 | * Parses a DataTable object from gviz. |
| 2017 | * The data is expected to have a first column that is either a date or a |
| 2018 | * number. All subsequent columns must be numbers. If there is a clear mismatch |
| 2019 | * between this.xValueParser_ and the type of the first column, it will be |
| 2020 | * fixed. Returned value is in the same format as return value of parseCSV_. |
| 2021 | * @param {Array.<Object>} data See above. |
| 2022 | * @private |
| 2023 | */ |
| 2024 | Dygraph.prototype.parseDataTable_ = function(data) { |
| 2025 | var cols = data.getNumberOfColumns(); |
| 2026 | var rows = data.getNumberOfRows(); |
| 2027 | |
| 2028 | // Read column labels |
| 2029 | var labels = []; |
| 2030 | for (var i = 0; i < cols; i++) { |
| 2031 | labels.push(data.getColumnLabel(i)); |
| 2032 | if (i != 0 && this.attr_("errorBars")) i += 1; |
| 2033 | } |
| 2034 | this.attrs_.labels = labels; |
| 2035 | cols = labels.length; |
| 2036 | |
| 2037 | var indepType = data.getColumnType(0); |
| 2038 | if (indepType == 'date' || indepType == 'datetime') { |
| 2039 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
| 2040 | this.attrs_.xValueParser = Dygraph.dateParser; |
| 2041 | this.attrs_.xTicker = Dygraph.dateTicker; |
| 2042 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
| 2043 | } else if (indepType == 'number') { |
| 2044 | this.attrs_.xValueFormatter = function(x) { return x; }; |
| 2045 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
| 2046 | this.attrs_.xTicker = Dygraph.numericTicks; |
| 2047 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
| 2048 | } else { |
| 2049 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
| 2050 | "column 1 of DataTable input (Got '" + indepType + "')"); |
| 2051 | return null; |
| 2052 | } |
| 2053 | |
| 2054 | var ret = []; |
| 2055 | var outOfOrder = false; |
| 2056 | for (var i = 0; i < rows; i++) { |
| 2057 | var row = []; |
| 2058 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
| 2059 | data.getValue(i, 0) === null) { |
| 2060 | this.warning("Ignoring row " + i + |
| 2061 | " of DataTable because of undefined or null first column."); |
| 2062 | continue; |
| 2063 | } |
| 2064 | |
| 2065 | if (indepType == 'date' || indepType == 'datetime') { |
| 2066 | row.push(data.getValue(i, 0).getTime()); |
| 2067 | } else { |
| 2068 | row.push(data.getValue(i, 0)); |
| 2069 | } |
| 2070 | if (!this.attr_("errorBars")) { |
| 2071 | for (var j = 1; j < cols; j++) { |
| 2072 | row.push(data.getValue(i, j)); |
| 2073 | } |
| 2074 | } else { |
| 2075 | for (var j = 0; j < cols - 1; j++) { |
| 2076 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); |
| 2077 | } |
| 2078 | } |
| 2079 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
| 2080 | outOfOrder = true; |
| 2081 | } |
| 2082 | ret.push(row); |
| 2083 | } |
| 2084 | |
| 2085 | if (outOfOrder) { |
| 2086 | this.warn("DataTable is out of order; order it correctly to speed loading."); |
| 2087 | ret.sort(function(a,b) { return a[0] - b[0] }); |
| 2088 | } |
| 2089 | return ret; |
| 2090 | } |
| 2091 | |
| 2092 | // These functions are all based on MochiKit. |
| 2093 | Dygraph.update = function (self, o) { |
| 2094 | if (typeof(o) != 'undefined' && o !== null) { |
| 2095 | for (var k in o) { |
| 2096 | if (o.hasOwnProperty(k)) { |
| 2097 | self[k] = o[k]; |
| 2098 | } |
| 2099 | } |
| 2100 | } |
| 2101 | return self; |
| 2102 | }; |
| 2103 | |
| 2104 | Dygraph.isArrayLike = function (o) { |
| 2105 | var typ = typeof(o); |
| 2106 | if ( |
| 2107 | (typ != 'object' && !(typ == 'function' && |
| 2108 | typeof(o.item) == 'function')) || |
| 2109 | o === null || |
| 2110 | typeof(o.length) != 'number' || |
| 2111 | o.nodeType === 3 |
| 2112 | ) { |
| 2113 | return false; |
| 2114 | } |
| 2115 | return true; |
| 2116 | }; |
| 2117 | |
| 2118 | Dygraph.isDateLike = function (o) { |
| 2119 | if (typeof(o) != "object" || o === null || |
| 2120 | typeof(o.getTime) != 'function') { |
| 2121 | return false; |
| 2122 | } |
| 2123 | return true; |
| 2124 | }; |
| 2125 | |
| 2126 | Dygraph.clone = function(o) { |
| 2127 | // TODO(danvk): figure out how MochiKit's version works |
| 2128 | var r = []; |
| 2129 | for (var i = 0; i < o.length; i++) { |
| 2130 | if (Dygraph.isArrayLike(o[i])) { |
| 2131 | r.push(Dygraph.clone(o[i])); |
| 2132 | } else { |
| 2133 | r.push(o[i]); |
| 2134 | } |
| 2135 | } |
| 2136 | return r; |
| 2137 | }; |
| 2138 | |
| 2139 | |
| 2140 | /** |
| 2141 | * Get the CSV data. If it's in a function, call that function. If it's in a |
| 2142 | * file, do an XMLHttpRequest to get it. |
| 2143 | * @private |
| 2144 | */ |
| 2145 | Dygraph.prototype.start_ = function() { |
| 2146 | if (typeof this.file_ == 'function') { |
| 2147 | // CSV string. Pretend we got it via XHR. |
| 2148 | this.loadedEvent_(this.file_()); |
| 2149 | } else if (Dygraph.isArrayLike(this.file_)) { |
| 2150 | this.rawData_ = this.parseArray_(this.file_); |
| 2151 | this.drawGraph_(this.rawData_); |
| 2152 | } else if (typeof this.file_ == 'object' && |
| 2153 | typeof this.file_.getColumnRange == 'function') { |
| 2154 | // must be a DataTable from gviz. |
| 2155 | this.rawData_ = this.parseDataTable_(this.file_); |
| 2156 | this.drawGraph_(this.rawData_); |
| 2157 | } else if (typeof this.file_ == 'string') { |
| 2158 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. |
| 2159 | if (this.file_.indexOf('\n') >= 0) { |
| 2160 | this.loadedEvent_(this.file_); |
| 2161 | } else { |
| 2162 | var req = new XMLHttpRequest(); |
| 2163 | var caller = this; |
| 2164 | req.onreadystatechange = function () { |
| 2165 | if (req.readyState == 4) { |
| 2166 | if (req.status == 200) { |
| 2167 | caller.loadedEvent_(req.responseText); |
| 2168 | } |
| 2169 | } |
| 2170 | }; |
| 2171 | |
| 2172 | req.open("GET", this.file_, true); |
| 2173 | req.send(null); |
| 2174 | } |
| 2175 | } else { |
| 2176 | this.error("Unknown data format: " + (typeof this.file_)); |
| 2177 | } |
| 2178 | }; |
| 2179 | |
| 2180 | /** |
| 2181 | * Changes various properties of the graph. These can include: |
| 2182 | * <ul> |
| 2183 | * <li>file: changes the source data for the graph</li> |
| 2184 | * <li>errorBars: changes whether the data contains stddev</li> |
| 2185 | * </ul> |
| 2186 | * @param {Object} attrs The new properties and values |
| 2187 | */ |
| 2188 | Dygraph.prototype.updateOptions = function(attrs) { |
| 2189 | // TODO(danvk): this is a mess. Rethink this function. |
| 2190 | if (attrs.rollPeriod) { |
| 2191 | this.rollPeriod_ = attrs.rollPeriod; |
| 2192 | } |
| 2193 | if (attrs.dateWindow) { |
| 2194 | this.dateWindow_ = attrs.dateWindow; |
| 2195 | } |
| 2196 | if (attrs.valueRange) { |
| 2197 | this.valueRange_ = attrs.valueRange; |
| 2198 | } |
| 2199 | Dygraph.update(this.user_attrs_, attrs); |
| 2200 | |
| 2201 | this.labelsFromCSV_ = (this.attr_("labels") == null); |
| 2202 | |
| 2203 | // TODO(danvk): this doesn't match the constructor logic |
| 2204 | this.layout_.updateOptions({ 'errorBars': this.attr_("errorBars") }); |
| 2205 | if (attrs['file']) { |
| 2206 | this.file_ = attrs['file']; |
| 2207 | this.start_(); |
| 2208 | } else { |
| 2209 | this.drawGraph_(this.rawData_); |
| 2210 | } |
| 2211 | }; |
| 2212 | |
| 2213 | /** |
| 2214 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
| 2215 | * containing div (which has presumably changed size since the dygraph was |
| 2216 | * instantiated. If the width/height are specified, the div will be resized. |
| 2217 | * |
| 2218 | * This is far more efficient than destroying and re-instantiating a |
| 2219 | * Dygraph, since it doesn't have to reparse the underlying data. |
| 2220 | * |
| 2221 | * @param {Number} width Width (in pixels) |
| 2222 | * @param {Number} height Height (in pixels) |
| 2223 | */ |
| 2224 | Dygraph.prototype.resize = function(width, height) { |
| 2225 | if (this.resize_lock) { |
| 2226 | return; |
| 2227 | } |
| 2228 | this.resize_lock = true; |
| 2229 | |
| 2230 | if ((width === null) != (height === null)) { |
| 2231 | this.warn("Dygraph.resize() should be called with zero parameters or " + |
| 2232 | "two non-NULL parameters. Pretending it was zero."); |
| 2233 | width = height = null; |
| 2234 | } |
| 2235 | |
| 2236 | // TODO(danvk): there should be a clear() method. |
| 2237 | this.maindiv_.innerHTML = ""; |
| 2238 | this.attrs_.labelsDiv = null; |
| 2239 | |
| 2240 | if (width) { |
| 2241 | this.maindiv_.style.width = width + "px"; |
| 2242 | this.maindiv_.style.height = height + "px"; |
| 2243 | this.width_ = width; |
| 2244 | this.height_ = height; |
| 2245 | } else { |
| 2246 | this.width_ = this.maindiv_.offsetWidth; |
| 2247 | this.height_ = this.maindiv_.offsetHeight; |
| 2248 | } |
| 2249 | |
| 2250 | this.createInterface_(); |
| 2251 | this.drawGraph_(this.rawData_); |
| 2252 | |
| 2253 | this.resize_lock = false; |
| 2254 | }; |
| 2255 | |
| 2256 | /** |
| 2257 | * Adjusts the number of days in the rolling average. Updates the graph to |
| 2258 | * reflect the new averaging period. |
| 2259 | * @param {Number} length Number of days over which to average the data. |
| 2260 | */ |
| 2261 | Dygraph.prototype.adjustRoll = function(length) { |
| 2262 | this.rollPeriod_ = length; |
| 2263 | this.drawGraph_(this.rawData_); |
| 2264 | }; |
| 2265 | |
| 2266 | /** |
| 2267 | * Returns a boolean array of visibility statuses. |
| 2268 | */ |
| 2269 | Dygraph.prototype.visibility = function() { |
| 2270 | // Do lazy-initialization, so that this happens after we know the number of |
| 2271 | // data series. |
| 2272 | if (!this.attr_("visibility")) { |
| 2273 | this.attrs_["visibility"] = []; |
| 2274 | } |
| 2275 | while (this.attr_("visibility").length < this.rawData_[0].length - 1) { |
| 2276 | this.attr_("visibility").push(true); |
| 2277 | } |
| 2278 | return this.attr_("visibility"); |
| 2279 | }; |
| 2280 | |
| 2281 | /** |
| 2282 | * Changes the visiblity of a series. |
| 2283 | */ |
| 2284 | Dygraph.prototype.setVisibility = function(num, value) { |
| 2285 | var x = this.visibility(); |
| 2286 | if (num < 0 && num >= x.length) { |
| 2287 | this.warn("invalid series number in setVisibility: " + num); |
| 2288 | } else { |
| 2289 | x[num] = value; |
| 2290 | this.drawGraph_(this.rawData_); |
| 2291 | } |
| 2292 | }; |
| 2293 | |
| 2294 | /** |
| 2295 | * Create a new canvas element. This is more complex than a simple |
| 2296 | * document.createElement("canvas") because of IE and excanvas. |
| 2297 | */ |
| 2298 | Dygraph.createCanvas = function() { |
| 2299 | var canvas = document.createElement("canvas"); |
| 2300 | |
| 2301 | isIE = (/MSIE/.test(navigator.userAgent) && !window.opera); |
| 2302 | if (isIE) { |
| 2303 | canvas = G_vmlCanvasManager.initElement(canvas); |
| 2304 | } |
| 2305 | |
| 2306 | return canvas; |
| 2307 | }; |
| 2308 | |
| 2309 | |
| 2310 | /** |
| 2311 | * A wrapper around Dygraph that implements the gviz API. |
| 2312 | * @param {Object} container The DOM object the visualization should live in. |
| 2313 | */ |
| 2314 | Dygraph.GVizChart = function(container) { |
| 2315 | this.container = container; |
| 2316 | } |
| 2317 | |
| 2318 | Dygraph.GVizChart.prototype.draw = function(data, options) { |
| 2319 | this.container.innerHTML = ''; |
| 2320 | this.date_graph = new Dygraph(this.container, data, options); |
| 2321 | } |
| 2322 | |
| 2323 | /** |
| 2324 | * Google charts compatible setSelection |
| 2325 | * Only row selection is supported, all points in the row will be highlighted |
| 2326 | * @param {Array} array of the selected cells |
| 2327 | * @public |
| 2328 | */ |
| 2329 | Dygraph.GVizChart.prototype.setSelection = function(selection_array) { |
| 2330 | var row = false; |
| 2331 | if (selection_array.length) { |
| 2332 | row = selection_array[0].row; |
| 2333 | } |
| 2334 | this.date_graph.setSelection(row); |
| 2335 | } |
| 2336 | |
| 2337 | /** |
| 2338 | * Google charts compatible getSelection implementation |
| 2339 | * @return {Array} array of the selected cells |
| 2340 | * @public |
| 2341 | */ |
| 2342 | Dygraph.GVizChart.prototype.getSelection = function() { |
| 2343 | var selection = []; |
| 2344 | |
| 2345 | var row = this.date_graph.getSelection(); |
| 2346 | |
| 2347 | if (row < 0) return selection; |
| 2348 | |
| 2349 | col = 1; |
| 2350 | for (var i in this.date_graph.layout_.datasets) { |
| 2351 | selection.push({row: row, column: col}); |
| 2352 | col++; |
| 2353 | } |
| 2354 | |
| 2355 | return selection; |
| 2356 | } |
| 2357 | |
| 2358 | // Older pages may still use this name. |
| 2359 | DateGraph = Dygraph; |