| 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 | Date,SeriesA,SeriesB,... |
| 28 | YYYYMMDD,A1,sigmaA1,B1,sigmaB1,... |
| 29 | YYYYMMDD,A2,sigmaA2,B2,sigmaB2,... |
| 30 | |
| 31 | If the 'fractions' option is set, the input should be of the form: |
| 32 | |
| 33 | Date,SeriesA,SeriesB,... |
| 34 | YYYYMMDD,A1/B1,A2/B2,... |
| 35 | YYYYMMDD,A1/B1,A2/B2,... |
| 36 | |
| 37 | And error bars will be calculated automatically using a binomial distribution. |
| 38 | |
| 39 | For further documentation and examples, see http://dygraphs.com/ |
| 40 | |
| 41 | */ |
| 42 | |
| 43 | /** |
| 44 | * Creates an interactive, zoomable chart. |
| 45 | * |
| 46 | * @constructor |
| 47 | * @param {div | String} div A div or the id of a div into which to construct |
| 48 | * the chart. |
| 49 | * @param {String | Function} file A file containing CSV data or a function |
| 50 | * that returns this data. The most basic expected format for each line is |
| 51 | * "YYYY/MM/DD,val1,val2,...". For more information, see |
| 52 | * http://dygraphs.com/data.html. |
| 53 | * @param {Object} attrs Various other attributes, e.g. errorBars determines |
| 54 | * whether the input data contains error ranges. For a complete list of |
| 55 | * options, see http://dygraphs.com/options.html. |
| 56 | */ |
| 57 | Dygraph = function(div, data, opts) { |
| 58 | if (arguments.length > 0) { |
| 59 | if (arguments.length == 4) { |
| 60 | // Old versions of dygraphs took in the series labels as a constructor |
| 61 | // parameter. This doesn't make sense anymore, but it's easy to continue |
| 62 | // to support this usage. |
| 63 | this.warn("Using deprecated four-argument dygraph constructor"); |
| 64 | this.__old_init__(div, data, arguments[2], arguments[3]); |
| 65 | } else { |
| 66 | this.__init__(div, data, opts); |
| 67 | } |
| 68 | } |
| 69 | }; |
| 70 | |
| 71 | Dygraph.NAME = "Dygraph"; |
| 72 | Dygraph.VERSION = "1.2"; |
| 73 | Dygraph.__repr__ = function() { |
| 74 | return "[" + this.NAME + " " + this.VERSION + "]"; |
| 75 | }; |
| 76 | |
| 77 | /** |
| 78 | * Returns information about the Dygraph class. |
| 79 | */ |
| 80 | Dygraph.toString = function() { |
| 81 | return this.__repr__(); |
| 82 | }; |
| 83 | |
| 84 | // Various default values |
| 85 | Dygraph.DEFAULT_ROLL_PERIOD = 1; |
| 86 | Dygraph.DEFAULT_WIDTH = 480; |
| 87 | Dygraph.DEFAULT_HEIGHT = 320; |
| 88 | |
| 89 | // These are defined before DEFAULT_ATTRS so that it can refer to them. |
| 90 | /** |
| 91 | * @private |
| 92 | * Return a string version of a number. This respects the digitsAfterDecimal |
| 93 | * and maxNumberWidth options. |
| 94 | * @param {Number} x The number to be formatted |
| 95 | * @param {Dygraph} opts An options view |
| 96 | * @param {String} name The name of the point's data series |
| 97 | * @param {Dygraph} g The dygraph object |
| 98 | */ |
| 99 | Dygraph.numberValueFormatter = function(x, opts, pt, g) { |
| 100 | var sigFigs = opts('sigFigs'); |
| 101 | |
| 102 | if (sigFigs !== null) { |
| 103 | // User has opted for a fixed number of significant figures. |
| 104 | return Dygraph.floatFormat(x, sigFigs); |
| 105 | } |
| 106 | |
| 107 | var digits = opts('digitsAfterDecimal'); |
| 108 | var maxNumberWidth = opts('maxNumberWidth'); |
| 109 | |
| 110 | // switch to scientific notation if we underflow or overflow fixed display. |
| 111 | if (x !== 0.0 && |
| 112 | (Math.abs(x) >= Math.pow(10, maxNumberWidth) || |
| 113 | Math.abs(x) < Math.pow(10, -digits))) { |
| 114 | return x.toExponential(digits); |
| 115 | } else { |
| 116 | return '' + Dygraph.round_(x, digits); |
| 117 | } |
| 118 | }; |
| 119 | |
| 120 | /** |
| 121 | * variant for use as an axisLabelFormatter. |
| 122 | * @private |
| 123 | */ |
| 124 | Dygraph.numberAxisLabelFormatter = function(x, granularity, opts, g) { |
| 125 | return Dygraph.numberValueFormatter(x, opts, g); |
| 126 | }; |
| 127 | |
| 128 | /** |
| 129 | * Convert a JS date (millis since epoch) to YYYY/MM/DD |
| 130 | * @param {Number} date The JavaScript date (ms since epoch) |
| 131 | * @return {String} A date of the form "YYYY/MM/DD" |
| 132 | * @private |
| 133 | */ |
| 134 | Dygraph.dateString_ = function(date) { |
| 135 | var zeropad = Dygraph.zeropad; |
| 136 | var d = new Date(date); |
| 137 | |
| 138 | // Get the year: |
| 139 | var year = "" + d.getFullYear(); |
| 140 | // Get a 0 padded month string |
| 141 | var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh |
| 142 | // Get a 0 padded day string |
| 143 | var day = zeropad(d.getDate()); |
| 144 | |
| 145 | var ret = ""; |
| 146 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); |
| 147 | if (frac) ret = " " + Dygraph.hmsString_(date); |
| 148 | |
| 149 | return year + "/" + month + "/" + day + ret; |
| 150 | }; |
| 151 | |
| 152 | /** |
| 153 | * Convert a JS date to a string appropriate to display on an axis that |
| 154 | * is displaying values at the stated granularity. |
| 155 | * @param {Date} date The date to format |
| 156 | * @param {Number} granularity One of the Dygraph granularity constants |
| 157 | * @return {String} The formatted date |
| 158 | * @private |
| 159 | */ |
| 160 | Dygraph.dateAxisFormatter = function(date, granularity) { |
| 161 | if (granularity >= Dygraph.DECADAL) { |
| 162 | return date.strftime('%Y'); |
| 163 | } else if (granularity >= Dygraph.MONTHLY) { |
| 164 | return date.strftime('%b %y'); |
| 165 | } else { |
| 166 | var frac = date.getHours() * 3600 + date.getMinutes() * 60 + date.getSeconds() + date.getMilliseconds(); |
| 167 | if (frac == 0 || granularity >= Dygraph.DAILY) { |
| 168 | return new Date(date.getTime() + 3600*1000).strftime('%d%b'); |
| 169 | } else { |
| 170 | return Dygraph.hmsString_(date.getTime()); |
| 171 | } |
| 172 | } |
| 173 | }; |
| 174 | |
| 175 | |
| 176 | // Default attribute values. |
| 177 | Dygraph.DEFAULT_ATTRS = { |
| 178 | highlightCircleSize: 3, |
| 179 | |
| 180 | labelsDivWidth: 250, |
| 181 | labelsDivStyles: { |
| 182 | // TODO(danvk): move defaults from createStatusMessage_ here. |
| 183 | }, |
| 184 | labelsSeparateLines: false, |
| 185 | labelsShowZeroValues: true, |
| 186 | labelsKMB: false, |
| 187 | labelsKMG2: false, |
| 188 | showLabelsOnHighlight: true, |
| 189 | |
| 190 | digitsAfterDecimal: 2, |
| 191 | maxNumberWidth: 6, |
| 192 | sigFigs: null, |
| 193 | |
| 194 | strokeWidth: 1.0, |
| 195 | |
| 196 | axisTickSize: 3, |
| 197 | axisLabelFontSize: 14, |
| 198 | xAxisLabelWidth: 50, |
| 199 | yAxisLabelWidth: 50, |
| 200 | rightGap: 5, |
| 201 | |
| 202 | showRoller: false, |
| 203 | xValueParser: Dygraph.dateParser, |
| 204 | |
| 205 | delimiter: ',', |
| 206 | |
| 207 | sigma: 2.0, |
| 208 | errorBars: false, |
| 209 | fractions: false, |
| 210 | wilsonInterval: true, // only relevant if fractions is true |
| 211 | customBars: false, |
| 212 | fillGraph: false, |
| 213 | fillAlpha: 0.15, |
| 214 | connectSeparatedPoints: false, |
| 215 | |
| 216 | stackedGraph: false, |
| 217 | hideOverlayOnMouseOut: true, |
| 218 | |
| 219 | // TODO(danvk): support 'onmouseover' and 'never', and remove synonyms. |
| 220 | legend: 'onmouseover', // the only relevant value at the moment is 'always'. |
| 221 | |
| 222 | stepPlot: false, |
| 223 | avoidMinZero: false, |
| 224 | |
| 225 | // Sizes of the various chart labels. |
| 226 | titleHeight: 28, |
| 227 | xLabelHeight: 18, |
| 228 | yLabelWidth: 18, |
| 229 | |
| 230 | drawXAxis: true, |
| 231 | drawYAxis: true, |
| 232 | axisLineColor: "black", |
| 233 | axisLineWidth: 0.3, |
| 234 | gridLineWidth: 0.3, |
| 235 | axisLabelColor: "black", |
| 236 | axisLabelFont: "Arial", // TODO(danvk): is this implemented? |
| 237 | axisLabelWidth: 50, |
| 238 | drawYGrid: true, |
| 239 | drawXGrid: true, |
| 240 | gridLineColor: "rgb(128,128,128)", |
| 241 | |
| 242 | interactionModel: null, // will be set to Dygraph.Interaction.defaultModel |
| 243 | |
| 244 | // per-axis options |
| 245 | axes: { |
| 246 | x: { |
| 247 | pixelsPerLabel: 60, |
| 248 | axisLabelFormatter: Dygraph.dateAxisFormatter, |
| 249 | valueFormatter: Dygraph.dateString_, |
| 250 | ticker: null // will be set in dygraph-tickers.js |
| 251 | }, |
| 252 | y: { |
| 253 | pixelsPerLabel: 30, |
| 254 | valueFormatter: Dygraph.numberValueFormatter, |
| 255 | axisLabelFormatter: Dygraph.numberAxisLabelFormatter, |
| 256 | ticker: null // will be set in dygraph-tickers.js |
| 257 | }, |
| 258 | y2: { |
| 259 | pixelsPerLabel: 30, |
| 260 | valueFormatter: Dygraph.numberValueFormatter, |
| 261 | axisLabelFormatter: Dygraph.numberAxisLabelFormatter, |
| 262 | ticker: null // will be set in dygraph-tickers.js |
| 263 | } |
| 264 | } |
| 265 | }; |
| 266 | |
| 267 | // Directions for panning and zooming. Use bit operations when combined |
| 268 | // values are possible. |
| 269 | Dygraph.HORIZONTAL = 1; |
| 270 | Dygraph.VERTICAL = 2; |
| 271 | |
| 272 | // Used for initializing annotation CSS rules only once. |
| 273 | Dygraph.addedAnnotationCSS = false; |
| 274 | |
| 275 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { |
| 276 | // Labels is no longer a constructor parameter, since it's typically set |
| 277 | // directly from the data source. It also conains a name for the x-axis, |
| 278 | // which the previous constructor form did not. |
| 279 | if (labels != null) { |
| 280 | var new_labels = ["Date"]; |
| 281 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); |
| 282 | Dygraph.update(attrs, { 'labels': new_labels }); |
| 283 | } |
| 284 | this.__init__(div, file, attrs); |
| 285 | }; |
| 286 | |
| 287 | /** |
| 288 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
| 289 | * and context <canvas> inside of it. See the constructor for details. |
| 290 | * on the parameters. |
| 291 | * @param {Element} div the Element to render the graph into. |
| 292 | * @param {String | Function} file Source data |
| 293 | * @param {Object} attrs Miscellaneous other options |
| 294 | * @private |
| 295 | */ |
| 296 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
| 297 | // Hack for IE: if we're using excanvas and the document hasn't finished |
| 298 | // loading yet (and hence may not have initialized whatever it needs to |
| 299 | // initialize), then keep calling this routine periodically until it has. |
| 300 | if (/MSIE/.test(navigator.userAgent) && !window.opera && |
| 301 | typeof(G_vmlCanvasManager) != 'undefined' && |
| 302 | document.readyState != 'complete') { |
| 303 | var self = this; |
| 304 | setTimeout(function() { self.__init__(div, file, attrs) }, 100); |
| 305 | } |
| 306 | |
| 307 | // Support two-argument constructor |
| 308 | if (attrs == null) { attrs = {}; } |
| 309 | |
| 310 | attrs = Dygraph.mapLegacyOptions_(attrs); |
| 311 | |
| 312 | if (!div) { |
| 313 | Dygraph.error("Constructing dygraph with a non-existent div!"); |
| 314 | return; |
| 315 | } |
| 316 | |
| 317 | // Copy the important bits into the object |
| 318 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
| 319 | this.maindiv_ = div; |
| 320 | this.file_ = file; |
| 321 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
| 322 | this.previousVerticalX_ = -1; |
| 323 | this.fractions_ = attrs.fractions || false; |
| 324 | this.dateWindow_ = attrs.dateWindow || null; |
| 325 | |
| 326 | this.wilsonInterval_ = attrs.wilsonInterval || true; |
| 327 | this.is_initial_draw_ = true; |
| 328 | this.annotations_ = []; |
| 329 | |
| 330 | // Zoomed indicators - These indicate when the graph has been zoomed and on what axis. |
| 331 | this.zoomed_x_ = false; |
| 332 | this.zoomed_y_ = false; |
| 333 | |
| 334 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
| 335 | // div, then only one will be drawn. |
| 336 | div.innerHTML = ""; |
| 337 | |
| 338 | // For historical reasons, the 'width' and 'height' options trump all CSS |
| 339 | // rules _except_ for an explicit 'width' or 'height' on the div. |
| 340 | // As an added convenience, if the div has zero height (like <div></div> does |
| 341 | // without any styles), then we use a default height/width. |
| 342 | if (div.style.width == '' && attrs.width) { |
| 343 | div.style.width = attrs.width + "px"; |
| 344 | } |
| 345 | if (div.style.height == '' && attrs.height) { |
| 346 | div.style.height = attrs.height + "px"; |
| 347 | } |
| 348 | if (div.style.height == '' && div.offsetHeight == 0) { |
| 349 | div.style.height = Dygraph.DEFAULT_HEIGHT + "px"; |
| 350 | if (div.style.width == '') { |
| 351 | div.style.width = Dygraph.DEFAULT_WIDTH + "px"; |
| 352 | } |
| 353 | } |
| 354 | // these will be zero if the dygraph's div is hidden. |
| 355 | this.width_ = div.offsetWidth; |
| 356 | this.height_ = div.offsetHeight; |
| 357 | |
| 358 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
| 359 | if (attrs['stackedGraph']) { |
| 360 | attrs['fillGraph'] = true; |
| 361 | // TODO(nikhilk): Add any other stackedGraph checks here. |
| 362 | } |
| 363 | |
| 364 | // Dygraphs has many options, some of which interact with one another. |
| 365 | // To keep track of everything, we maintain two sets of options: |
| 366 | // |
| 367 | // this.user_attrs_ only options explicitly set by the user. |
| 368 | // this.attrs_ defaults, options derived from user_attrs_, data. |
| 369 | // |
| 370 | // Options are then accessed this.attr_('attr'), which first looks at |
| 371 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent |
| 372 | // defaults without overriding behavior that the user specifically asks for. |
| 373 | this.user_attrs_ = {}; |
| 374 | Dygraph.update(this.user_attrs_, attrs); |
| 375 | |
| 376 | // This sequence ensures that Dygraph.DEFAULT_ATTRS is never modified. |
| 377 | this.attrs_ = {}; |
| 378 | Dygraph.updateDeep(this.attrs_, Dygraph.DEFAULT_ATTRS); |
| 379 | |
| 380 | this.boundaryIds_ = []; |
| 381 | |
| 382 | // Create the containing DIV and other interactive elements |
| 383 | this.createInterface_(); |
| 384 | |
| 385 | this.start_(); |
| 386 | }; |
| 387 | |
| 388 | /** |
| 389 | * Returns the zoomed status of the chart for one or both axes. |
| 390 | * |
| 391 | * Axis is an optional parameter. Can be set to 'x' or 'y'. |
| 392 | * |
| 393 | * The zoomed status for an axis is set whenever a user zooms using the mouse |
| 394 | * or when the dateWindow or valueRange are updated (unless the isZoomedIgnoreProgrammaticZoom |
| 395 | * option is also specified). |
| 396 | */ |
| 397 | Dygraph.prototype.isZoomed = function(axis) { |
| 398 | if (axis == null) return this.zoomed_x_ || this.zoomed_y_; |
| 399 | if (axis == 'x') return this.zoomed_x_; |
| 400 | if (axis == 'y') return this.zoomed_y_; |
| 401 | throw "axis parameter to Dygraph.isZoomed must be missing, 'x' or 'y'."; |
| 402 | }; |
| 403 | |
| 404 | /** |
| 405 | * Returns information about the Dygraph object, including its containing ID. |
| 406 | */ |
| 407 | Dygraph.prototype.toString = function() { |
| 408 | var maindiv = this.maindiv_; |
| 409 | var id = (maindiv && maindiv.id) ? maindiv.id : maindiv |
| 410 | return "[Dygraph " + id + "]"; |
| 411 | } |
| 412 | |
| 413 | /** |
| 414 | * @private |
| 415 | * Returns the value of an option. This may be set by the user (either in the |
| 416 | * constructor or by calling updateOptions) or by dygraphs, and may be set to a |
| 417 | * per-series value. |
| 418 | * @param { String } name The name of the option, e.g. 'rollPeriod'. |
| 419 | * @param { String } [seriesName] The name of the series to which the option |
| 420 | * will be applied. If no per-series value of this option is available, then |
| 421 | * the global value is returned. This is optional. |
| 422 | * @return { ... } The value of the option. |
| 423 | */ |
| 424 | Dygraph.prototype.attr_ = function(name, seriesName) { |
| 425 | // <REMOVE_FOR_COMBINED> |
| 426 | if (typeof(Dygraph.OPTIONS_REFERENCE) === 'undefined') { |
| 427 | this.error('Must include options reference JS for testing'); |
| 428 | } else if (!Dygraph.OPTIONS_REFERENCE.hasOwnProperty(name)) { |
| 429 | this.error('Dygraphs is using property ' + name + ', which has no entry ' + |
| 430 | 'in the Dygraphs.OPTIONS_REFERENCE listing.'); |
| 431 | // Only log this error once. |
| 432 | Dygraph.OPTIONS_REFERENCE[name] = true; |
| 433 | } |
| 434 | // </REMOVE_FOR_COMBINED> |
| 435 | if (seriesName && |
| 436 | typeof(this.user_attrs_[seriesName]) != 'undefined' && |
| 437 | this.user_attrs_[seriesName] != null && |
| 438 | typeof(this.user_attrs_[seriesName][name]) != 'undefined') { |
| 439 | return this.user_attrs_[seriesName][name]; |
| 440 | } else if (typeof(this.user_attrs_[name]) != 'undefined') { |
| 441 | return this.user_attrs_[name]; |
| 442 | } else if (typeof(this.attrs_[name]) != 'undefined') { |
| 443 | return this.attrs_[name]; |
| 444 | } else { |
| 445 | return null; |
| 446 | } |
| 447 | }; |
| 448 | |
| 449 | /** |
| 450 | * @private |
| 451 | * @param String} axis The name of the axis (i.e. 'x', 'y' or 'y2') |
| 452 | * @return { ... } A function mapping string -> option value |
| 453 | */ |
| 454 | Dygraph.prototype.optionsViewForAxis_ = function(axis) { |
| 455 | var self = this; |
| 456 | return function(opt) { |
| 457 | var axis_opts = self.user_attrs_['axes']; |
| 458 | if (axis_opts && axis_opts[axis] && axis_opts[axis][opt]) { |
| 459 | return axis_opts[axis][opt]; |
| 460 | } |
| 461 | // user-specified attributes always trump defaults, even if they're less |
| 462 | // specific. |
| 463 | if (typeof(self.user_attrs_[opt]) != 'undefined') { |
| 464 | return self.user_attrs_[opt]; |
| 465 | } |
| 466 | |
| 467 | axis_opts = self.attrs_['axes']; |
| 468 | if (axis_opts && axis_opts[axis] && axis_opts[axis][opt]) { |
| 469 | return axis_opts[axis][opt]; |
| 470 | } |
| 471 | // check old-style axis options |
| 472 | // TODO(danvk): add a deprecation warning if either of these match. |
| 473 | if (axis == 'y' && self.axes_[0].hasOwnProperty(opt)) { |
| 474 | return self.axes_[0][opt]; |
| 475 | } else if (axis == 'y2' && self.axes_[1].hasOwnProperty(opt)) { |
| 476 | return self.axes_[1][opt]; |
| 477 | } |
| 478 | return self.attr_(opt); |
| 479 | }; |
| 480 | }; |
| 481 | |
| 482 | /** |
| 483 | * Returns the current rolling period, as set by the user or an option. |
| 484 | * @return {Number} The number of points in the rolling window |
| 485 | */ |
| 486 | Dygraph.prototype.rollPeriod = function() { |
| 487 | return this.rollPeriod_; |
| 488 | }; |
| 489 | |
| 490 | /** |
| 491 | * Returns the currently-visible x-range. This can be affected by zooming, |
| 492 | * panning or a call to updateOptions. |
| 493 | * Returns a two-element array: [left, right]. |
| 494 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. |
| 495 | */ |
| 496 | Dygraph.prototype.xAxisRange = function() { |
| 497 | return this.dateWindow_ ? this.dateWindow_ : this.xAxisExtremes(); |
| 498 | }; |
| 499 | |
| 500 | /** |
| 501 | * Returns the lower- and upper-bound x-axis values of the |
| 502 | * data set. |
| 503 | */ |
| 504 | Dygraph.prototype.xAxisExtremes = function() { |
| 505 | var left = this.rawData_[0][0]; |
| 506 | var right = this.rawData_[this.rawData_.length - 1][0]; |
| 507 | return [left, right]; |
| 508 | }; |
| 509 | |
| 510 | /** |
| 511 | * Returns the currently-visible y-range for an axis. This can be affected by |
| 512 | * zooming, panning or a call to updateOptions. Axis indices are zero-based. If |
| 513 | * called with no arguments, returns the range of the first axis. |
| 514 | * Returns a two-element array: [bottom, top]. |
| 515 | */ |
| 516 | Dygraph.prototype.yAxisRange = function(idx) { |
| 517 | if (typeof(idx) == "undefined") idx = 0; |
| 518 | if (idx < 0 || idx >= this.axes_.length) { |
| 519 | return null; |
| 520 | } |
| 521 | var axis = this.axes_[idx]; |
| 522 | return [ axis.computedValueRange[0], axis.computedValueRange[1] ]; |
| 523 | }; |
| 524 | |
| 525 | /** |
| 526 | * Returns the currently-visible y-ranges for each axis. This can be affected by |
| 527 | * zooming, panning, calls to updateOptions, etc. |
| 528 | * Returns an array of [bottom, top] pairs, one for each y-axis. |
| 529 | */ |
| 530 | Dygraph.prototype.yAxisRanges = function() { |
| 531 | var ret = []; |
| 532 | for (var i = 0; i < this.axes_.length; i++) { |
| 533 | ret.push(this.yAxisRange(i)); |
| 534 | } |
| 535 | return ret; |
| 536 | }; |
| 537 | |
| 538 | // TODO(danvk): use these functions throughout dygraphs. |
| 539 | /** |
| 540 | * Convert from data coordinates to canvas/div X/Y coordinates. |
| 541 | * If specified, do this conversion for the coordinate system of a particular |
| 542 | * axis. Uses the first axis by default. |
| 543 | * Returns a two-element array: [X, Y] |
| 544 | * |
| 545 | * Note: use toDomXCoord instead of toDomCoords(x, null) and use toDomYCoord |
| 546 | * instead of toDomCoords(null, y, axis). |
| 547 | */ |
| 548 | Dygraph.prototype.toDomCoords = function(x, y, axis) { |
| 549 | return [ this.toDomXCoord(x), this.toDomYCoord(y, axis) ]; |
| 550 | }; |
| 551 | |
| 552 | /** |
| 553 | * Convert from data x coordinates to canvas/div X coordinate. |
| 554 | * If specified, do this conversion for the coordinate system of a particular |
| 555 | * axis. |
| 556 | * Returns a single value or null if x is null. |
| 557 | */ |
| 558 | Dygraph.prototype.toDomXCoord = function(x) { |
| 559 | if (x == null) { |
| 560 | return null; |
| 561 | }; |
| 562 | |
| 563 | var area = this.plotter_.area; |
| 564 | var xRange = this.xAxisRange(); |
| 565 | return area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; |
| 566 | } |
| 567 | |
| 568 | /** |
| 569 | * Convert from data x coordinates to canvas/div Y coordinate and optional |
| 570 | * axis. Uses the first axis by default. |
| 571 | * |
| 572 | * returns a single value or null if y is null. |
| 573 | */ |
| 574 | Dygraph.prototype.toDomYCoord = function(y, axis) { |
| 575 | var pct = this.toPercentYCoord(y, axis); |
| 576 | |
| 577 | if (pct == null) { |
| 578 | return null; |
| 579 | } |
| 580 | var area = this.plotter_.area; |
| 581 | return area.y + pct * area.h; |
| 582 | } |
| 583 | |
| 584 | /** |
| 585 | * Convert from canvas/div coords to data coordinates. |
| 586 | * If specified, do this conversion for the coordinate system of a particular |
| 587 | * axis. Uses the first axis by default. |
| 588 | * Returns a two-element array: [X, Y]. |
| 589 | * |
| 590 | * Note: use toDataXCoord instead of toDataCoords(x, null) and use toDataYCoord |
| 591 | * instead of toDataCoords(null, y, axis). |
| 592 | */ |
| 593 | Dygraph.prototype.toDataCoords = function(x, y, axis) { |
| 594 | return [ this.toDataXCoord(x), this.toDataYCoord(y, axis) ]; |
| 595 | }; |
| 596 | |
| 597 | /** |
| 598 | * Convert from canvas/div x coordinate to data coordinate. |
| 599 | * |
| 600 | * If x is null, this returns null. |
| 601 | */ |
| 602 | Dygraph.prototype.toDataXCoord = function(x) { |
| 603 | if (x == null) { |
| 604 | return null; |
| 605 | } |
| 606 | |
| 607 | var area = this.plotter_.area; |
| 608 | var xRange = this.xAxisRange(); |
| 609 | return xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); |
| 610 | }; |
| 611 | |
| 612 | /** |
| 613 | * Convert from canvas/div y coord to value. |
| 614 | * |
| 615 | * If y is null, this returns null. |
| 616 | * if axis is null, this uses the first axis. |
| 617 | */ |
| 618 | Dygraph.prototype.toDataYCoord = function(y, axis) { |
| 619 | if (y == null) { |
| 620 | return null; |
| 621 | } |
| 622 | |
| 623 | var area = this.plotter_.area; |
| 624 | var yRange = this.yAxisRange(axis); |
| 625 | |
| 626 | if (typeof(axis) == "undefined") axis = 0; |
| 627 | if (!this.axes_[axis].logscale) { |
| 628 | return yRange[0] + (area.y + area.h - y) / area.h * (yRange[1] - yRange[0]); |
| 629 | } else { |
| 630 | // Computing the inverse of toDomCoord. |
| 631 | var pct = (y - area.y) / area.h |
| 632 | |
| 633 | // Computing the inverse of toPercentYCoord. The function was arrived at with |
| 634 | // the following steps: |
| 635 | // |
| 636 | // Original calcuation: |
| 637 | // pct = (logr1 - Dygraph.log10(y)) / (logr1 - Dygraph.log10(yRange[0])); |
| 638 | // |
| 639 | // Move denominator to both sides: |
| 640 | // pct * (logr1 - Dygraph.log10(yRange[0])) = logr1 - Dygraph.log10(y); |
| 641 | // |
| 642 | // subtract logr1, and take the negative value. |
| 643 | // logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))) = Dygraph.log10(y); |
| 644 | // |
| 645 | // Swap both sides of the equation, and we can compute the log of the |
| 646 | // return value. Which means we just need to use that as the exponent in |
| 647 | // e^exponent. |
| 648 | // Dygraph.log10(y) = logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))); |
| 649 | |
| 650 | var logr1 = Dygraph.log10(yRange[1]); |
| 651 | var exponent = logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))); |
| 652 | var value = Math.pow(Dygraph.LOG_SCALE, exponent); |
| 653 | return value; |
| 654 | } |
| 655 | }; |
| 656 | |
| 657 | /** |
| 658 | * Converts a y for an axis to a percentage from the top to the |
| 659 | * bottom of the drawing area. |
| 660 | * |
| 661 | * If the coordinate represents a value visible on the canvas, then |
| 662 | * the value will be between 0 and 1, where 0 is the top of the canvas. |
| 663 | * However, this method will return values outside the range, as |
| 664 | * values can fall outside the canvas. |
| 665 | * |
| 666 | * If y is null, this returns null. |
| 667 | * if axis is null, this uses the first axis. |
| 668 | * |
| 669 | * @param { Number } y The data y-coordinate. |
| 670 | * @param { Number } [axis] The axis number on which the data coordinate lives. |
| 671 | * @return { Number } A fraction in [0, 1] where 0 = the top edge. |
| 672 | */ |
| 673 | Dygraph.prototype.toPercentYCoord = function(y, axis) { |
| 674 | if (y == null) { |
| 675 | return null; |
| 676 | } |
| 677 | if (typeof(axis) == "undefined") axis = 0; |
| 678 | |
| 679 | var area = this.plotter_.area; |
| 680 | var yRange = this.yAxisRange(axis); |
| 681 | |
| 682 | var pct; |
| 683 | if (!this.axes_[axis].logscale) { |
| 684 | // yRange[1] - y is unit distance from the bottom. |
| 685 | // yRange[1] - yRange[0] is the scale of the range. |
| 686 | // (yRange[1] - y) / (yRange[1] - yRange[0]) is the % from the bottom. |
| 687 | pct = (yRange[1] - y) / (yRange[1] - yRange[0]); |
| 688 | } else { |
| 689 | var logr1 = Dygraph.log10(yRange[1]); |
| 690 | pct = (logr1 - Dygraph.log10(y)) / (logr1 - Dygraph.log10(yRange[0])); |
| 691 | } |
| 692 | return pct; |
| 693 | } |
| 694 | |
| 695 | /** |
| 696 | * Converts an x value to a percentage from the left to the right of |
| 697 | * the drawing area. |
| 698 | * |
| 699 | * If the coordinate represents a value visible on the canvas, then |
| 700 | * the value will be between 0 and 1, where 0 is the left of the canvas. |
| 701 | * However, this method will return values outside the range, as |
| 702 | * values can fall outside the canvas. |
| 703 | * |
| 704 | * If x is null, this returns null. |
| 705 | * @param { Number } x The data x-coordinate. |
| 706 | * @return { Number } A fraction in [0, 1] where 0 = the left edge. |
| 707 | */ |
| 708 | Dygraph.prototype.toPercentXCoord = function(x) { |
| 709 | if (x == null) { |
| 710 | return null; |
| 711 | } |
| 712 | |
| 713 | var xRange = this.xAxisRange(); |
| 714 | return (x - xRange[0]) / (xRange[1] - xRange[0]); |
| 715 | }; |
| 716 | |
| 717 | /** |
| 718 | * Returns the number of columns (including the independent variable). |
| 719 | * @return { Integer } The number of columns. |
| 720 | */ |
| 721 | Dygraph.prototype.numColumns = function() { |
| 722 | return this.rawData_[0].length; |
| 723 | }; |
| 724 | |
| 725 | /** |
| 726 | * Returns the number of rows (excluding any header/label row). |
| 727 | * @return { Integer } The number of rows, less any header. |
| 728 | */ |
| 729 | Dygraph.prototype.numRows = function() { |
| 730 | return this.rawData_.length; |
| 731 | }; |
| 732 | |
| 733 | /** |
| 734 | * Returns the value in the given row and column. If the row and column exceed |
| 735 | * the bounds on the data, returns null. Also returns null if the value is |
| 736 | * missing. |
| 737 | * @param { Number} row The row number of the data (0-based). Row 0 is the |
| 738 | * first row of data, not a header row. |
| 739 | * @param { Number} col The column number of the data (0-based) |
| 740 | * @return { Number } The value in the specified cell or null if the row/col |
| 741 | * were out of range. |
| 742 | */ |
| 743 | Dygraph.prototype.getValue = function(row, col) { |
| 744 | if (row < 0 || row > this.rawData_.length) return null; |
| 745 | if (col < 0 || col > this.rawData_[row].length) return null; |
| 746 | |
| 747 | return this.rawData_[row][col]; |
| 748 | }; |
| 749 | |
| 750 | /** |
| 751 | * Generates interface elements for the Dygraph: a containing div, a div to |
| 752 | * display the current point, and a textbox to adjust the rolling average |
| 753 | * period. Also creates the Renderer/Layout elements. |
| 754 | * @private |
| 755 | */ |
| 756 | Dygraph.prototype.createInterface_ = function() { |
| 757 | // Create the all-enclosing graph div |
| 758 | var enclosing = this.maindiv_; |
| 759 | |
| 760 | this.graphDiv = document.createElement("div"); |
| 761 | this.graphDiv.style.width = this.width_ + "px"; |
| 762 | this.graphDiv.style.height = this.height_ + "px"; |
| 763 | enclosing.appendChild(this.graphDiv); |
| 764 | |
| 765 | // Create the canvas for interactive parts of the chart. |
| 766 | this.canvas_ = Dygraph.createCanvas(); |
| 767 | this.canvas_.style.position = "absolute"; |
| 768 | this.canvas_.width = this.width_; |
| 769 | this.canvas_.height = this.height_; |
| 770 | this.canvas_.style.width = this.width_ + "px"; // for IE |
| 771 | this.canvas_.style.height = this.height_ + "px"; // for IE |
| 772 | |
| 773 | this.canvas_ctx_ = Dygraph.getContext(this.canvas_); |
| 774 | |
| 775 | // ... and for static parts of the chart. |
| 776 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
| 777 | this.hidden_ctx_ = Dygraph.getContext(this.hidden_); |
| 778 | |
| 779 | // The interactive parts of the graph are drawn on top of the chart. |
| 780 | this.graphDiv.appendChild(this.hidden_); |
| 781 | this.graphDiv.appendChild(this.canvas_); |
| 782 | this.mouseEventElement_ = this.canvas_; |
| 783 | |
| 784 | var dygraph = this; |
| 785 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(e) { |
| 786 | dygraph.mouseMove_(e); |
| 787 | }); |
| 788 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(e) { |
| 789 | dygraph.mouseOut_(e); |
| 790 | }); |
| 791 | |
| 792 | // Create the grapher |
| 793 | this.layout_ = new DygraphLayout(this); |
| 794 | |
| 795 | this.createStatusMessage_(); |
| 796 | this.createDragInterface_(); |
| 797 | |
| 798 | // Update when the window is resized. |
| 799 | // TODO(danvk): drop frames depending on complexity of the chart. |
| 800 | Dygraph.addEvent(window, 'resize', function(e) { |
| 801 | dygraph.resize(); |
| 802 | }); |
| 803 | }; |
| 804 | |
| 805 | /** |
| 806 | * Detach DOM elements in the dygraph and null out all data references. |
| 807 | * Calling this when you're done with a dygraph can dramatically reduce memory |
| 808 | * usage. See, e.g., the tests/perf.html example. |
| 809 | */ |
| 810 | Dygraph.prototype.destroy = function() { |
| 811 | var removeRecursive = function(node) { |
| 812 | while (node.hasChildNodes()) { |
| 813 | removeRecursive(node.firstChild); |
| 814 | node.removeChild(node.firstChild); |
| 815 | } |
| 816 | }; |
| 817 | removeRecursive(this.maindiv_); |
| 818 | |
| 819 | var nullOut = function(obj) { |
| 820 | for (var n in obj) { |
| 821 | if (typeof(obj[n]) === 'object') { |
| 822 | obj[n] = null; |
| 823 | } |
| 824 | } |
| 825 | }; |
| 826 | |
| 827 | // These may not all be necessary, but it can't hurt... |
| 828 | nullOut(this.layout_); |
| 829 | nullOut(this.plotter_); |
| 830 | nullOut(this); |
| 831 | }; |
| 832 | |
| 833 | /** |
| 834 | * Creates the canvas on which the chart will be drawn. Only the Renderer ever |
| 835 | * draws on this particular canvas. All Dygraph work (i.e. drawing hover dots |
| 836 | * or the zoom rectangles) is done on this.canvas_. |
| 837 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
| 838 | * @return {Object} The newly-created canvas |
| 839 | * @private |
| 840 | */ |
| 841 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
| 842 | var h = Dygraph.createCanvas(); |
| 843 | h.style.position = "absolute"; |
| 844 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
| 845 | // some extra area to make it easier to zoom in on the far left and far |
| 846 | // right. h needs to be precisely the plot area, so that clipping occurs. |
| 847 | h.style.top = canvas.style.top; |
| 848 | h.style.left = canvas.style.left; |
| 849 | h.width = this.width_; |
| 850 | h.height = this.height_; |
| 851 | h.style.width = this.width_ + "px"; // for IE |
| 852 | h.style.height = this.height_ + "px"; // for IE |
| 853 | return h; |
| 854 | }; |
| 855 | |
| 856 | /** |
| 857 | * Generate a set of distinct colors for the data series. This is done with a |
| 858 | * color wheel. Saturation/Value are customizable, and the hue is |
| 859 | * equally-spaced around the color wheel. If a custom set of colors is |
| 860 | * specified, that is used instead. |
| 861 | * @private |
| 862 | */ |
| 863 | Dygraph.prototype.setColors_ = function() { |
| 864 | var num = this.attr_("labels").length - 1; |
| 865 | this.colors_ = []; |
| 866 | var colors = this.attr_('colors'); |
| 867 | if (!colors) { |
| 868 | var sat = this.attr_('colorSaturation') || 1.0; |
| 869 | var val = this.attr_('colorValue') || 0.5; |
| 870 | var half = Math.ceil(num / 2); |
| 871 | for (var i = 1; i <= num; i++) { |
| 872 | if (!this.visibility()[i-1]) continue; |
| 873 | // alternate colors for high contrast. |
| 874 | var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2); |
| 875 | var hue = (1.0 * idx/ (1 + num)); |
| 876 | this.colors_.push(Dygraph.hsvToRGB(hue, sat, val)); |
| 877 | } |
| 878 | } else { |
| 879 | for (var i = 0; i < num; i++) { |
| 880 | if (!this.visibility()[i]) continue; |
| 881 | var colorStr = colors[i % colors.length]; |
| 882 | this.colors_.push(colorStr); |
| 883 | } |
| 884 | } |
| 885 | |
| 886 | this.plotter_.setColors(this.colors_); |
| 887 | }; |
| 888 | |
| 889 | /** |
| 890 | * Return the list of colors. This is either the list of colors passed in the |
| 891 | * attributes or the autogenerated list of rgb(r,g,b) strings. |
| 892 | * @return {Array<string>} The list of colors. |
| 893 | */ |
| 894 | Dygraph.prototype.getColors = function() { |
| 895 | return this.colors_; |
| 896 | }; |
| 897 | |
| 898 | /** |
| 899 | * Create the div that contains information on the selected point(s) |
| 900 | * This goes in the top right of the canvas, unless an external div has already |
| 901 | * been specified. |
| 902 | * @private |
| 903 | */ |
| 904 | Dygraph.prototype.createStatusMessage_ = function() { |
| 905 | var userLabelsDiv = this.user_attrs_["labelsDiv"]; |
| 906 | if (userLabelsDiv && null != userLabelsDiv |
| 907 | && (typeof(userLabelsDiv) == "string" || userLabelsDiv instanceof String)) { |
| 908 | this.user_attrs_["labelsDiv"] = document.getElementById(userLabelsDiv); |
| 909 | } |
| 910 | if (!this.attr_("labelsDiv")) { |
| 911 | var divWidth = this.attr_('labelsDivWidth'); |
| 912 | var messagestyle = { |
| 913 | "position": "absolute", |
| 914 | "fontSize": "14px", |
| 915 | "zIndex": 10, |
| 916 | "width": divWidth + "px", |
| 917 | "top": "0px", |
| 918 | "left": (this.width_ - divWidth - 2) + "px", |
| 919 | "background": "white", |
| 920 | "textAlign": "left", |
| 921 | "overflow": "hidden"}; |
| 922 | Dygraph.update(messagestyle, this.attr_('labelsDivStyles')); |
| 923 | var div = document.createElement("div"); |
| 924 | div.className = "dygraph-legend"; |
| 925 | for (var name in messagestyle) { |
| 926 | if (messagestyle.hasOwnProperty(name)) { |
| 927 | div.style[name] = messagestyle[name]; |
| 928 | } |
| 929 | } |
| 930 | this.graphDiv.appendChild(div); |
| 931 | this.attrs_.labelsDiv = div; |
| 932 | } |
| 933 | }; |
| 934 | |
| 935 | /** |
| 936 | * Position the labels div so that: |
| 937 | * - its right edge is flush with the right edge of the charting area |
| 938 | * - its top edge is flush with the top edge of the charting area |
| 939 | * @private |
| 940 | */ |
| 941 | Dygraph.prototype.positionLabelsDiv_ = function() { |
| 942 | // Don't touch a user-specified labelsDiv. |
| 943 | if (this.user_attrs_.hasOwnProperty("labelsDiv")) return; |
| 944 | |
| 945 | var area = this.plotter_.area; |
| 946 | var div = this.attr_("labelsDiv"); |
| 947 | div.style.left = area.x + area.w - this.attr_("labelsDivWidth") - 1 + "px"; |
| 948 | div.style.top = area.y + "px"; |
| 949 | }; |
| 950 | |
| 951 | /** |
| 952 | * Create the text box to adjust the averaging period |
| 953 | * @private |
| 954 | */ |
| 955 | Dygraph.prototype.createRollInterface_ = function() { |
| 956 | // Create a roller if one doesn't exist already. |
| 957 | if (!this.roller_) { |
| 958 | this.roller_ = document.createElement("input"); |
| 959 | this.roller_.type = "text"; |
| 960 | this.roller_.style.display = "none"; |
| 961 | this.graphDiv.appendChild(this.roller_); |
| 962 | } |
| 963 | |
| 964 | var display = this.attr_('showRoller') ? 'block' : 'none'; |
| 965 | |
| 966 | var area = this.plotter_.area; |
| 967 | var textAttr = { "position": "absolute", |
| 968 | "zIndex": 10, |
| 969 | "top": (area.y + area.h - 25) + "px", |
| 970 | "left": (area.x + 1) + "px", |
| 971 | "display": display |
| 972 | }; |
| 973 | this.roller_.size = "2"; |
| 974 | this.roller_.value = this.rollPeriod_; |
| 975 | for (var name in textAttr) { |
| 976 | if (textAttr.hasOwnProperty(name)) { |
| 977 | this.roller_.style[name] = textAttr[name]; |
| 978 | } |
| 979 | } |
| 980 | |
| 981 | var dygraph = this; |
| 982 | this.roller_.onchange = function() { dygraph.adjustRoll(dygraph.roller_.value); }; |
| 983 | }; |
| 984 | |
| 985 | /** |
| 986 | * @private |
| 987 | * Converts page the x-coordinate of the event to pixel x-coordinates on the |
| 988 | * canvas (i.e. DOM Coords). |
| 989 | */ |
| 990 | Dygraph.prototype.dragGetX_ = function(e, context) { |
| 991 | return Dygraph.pageX(e) - context.px |
| 992 | }; |
| 993 | |
| 994 | /** |
| 995 | * @private |
| 996 | * Converts page the y-coordinate of the event to pixel y-coordinates on the |
| 997 | * canvas (i.e. DOM Coords). |
| 998 | */ |
| 999 | Dygraph.prototype.dragGetY_ = function(e, context) { |
| 1000 | return Dygraph.pageY(e) - context.py |
| 1001 | }; |
| 1002 | |
| 1003 | /** |
| 1004 | * Set up all the mouse handlers needed to capture dragging behavior for zoom |
| 1005 | * events. |
| 1006 | * @private |
| 1007 | */ |
| 1008 | Dygraph.prototype.createDragInterface_ = function() { |
| 1009 | var context = { |
| 1010 | // Tracks whether the mouse is down right now |
| 1011 | isZooming: false, |
| 1012 | isPanning: false, // is this drag part of a pan? |
| 1013 | is2DPan: false, // if so, is that pan 1- or 2-dimensional? |
| 1014 | dragStartX: null, // pixel coordinates |
| 1015 | dragStartY: null, // pixel coordinates |
| 1016 | dragEndX: null, // pixel coordinates |
| 1017 | dragEndY: null, // pixel coordinates |
| 1018 | dragDirection: null, |
| 1019 | prevEndX: null, // pixel coordinates |
| 1020 | prevEndY: null, // pixel coordinates |
| 1021 | prevDragDirection: null, |
| 1022 | |
| 1023 | // The value on the left side of the graph when a pan operation starts. |
| 1024 | initialLeftmostDate: null, |
| 1025 | |
| 1026 | // The number of units each pixel spans. (This won't be valid for log |
| 1027 | // scales) |
| 1028 | xUnitsPerPixel: null, |
| 1029 | |
| 1030 | // TODO(danvk): update this comment |
| 1031 | // The range in second/value units that the viewport encompasses during a |
| 1032 | // panning operation. |
| 1033 | dateRange: null, |
| 1034 | |
| 1035 | // Top-left corner of the canvas, in DOM coords |
| 1036 | // TODO(konigsberg): Rename topLeftCanvasX, topLeftCanvasY. |
| 1037 | px: 0, |
| 1038 | py: 0, |
| 1039 | |
| 1040 | // Values for use with panEdgeFraction, which limit how far outside the |
| 1041 | // graph's data boundaries it can be panned. |
| 1042 | boundedDates: null, // [minDate, maxDate] |
| 1043 | boundedValues: null, // [[minValue, maxValue] ...] |
| 1044 | |
| 1045 | initializeMouseDown: function(event, g, context) { |
| 1046 | // prevents mouse drags from selecting page text. |
| 1047 | if (event.preventDefault) { |
| 1048 | event.preventDefault(); // Firefox, Chrome, etc. |
| 1049 | } else { |
| 1050 | event.returnValue = false; // IE |
| 1051 | event.cancelBubble = true; |
| 1052 | } |
| 1053 | |
| 1054 | context.px = Dygraph.findPosX(g.canvas_); |
| 1055 | context.py = Dygraph.findPosY(g.canvas_); |
| 1056 | context.dragStartX = g.dragGetX_(event, context); |
| 1057 | context.dragStartY = g.dragGetY_(event, context); |
| 1058 | } |
| 1059 | }; |
| 1060 | |
| 1061 | var interactionModel = this.attr_("interactionModel"); |
| 1062 | |
| 1063 | // Self is the graph. |
| 1064 | var self = this; |
| 1065 | |
| 1066 | // Function that binds the graph and context to the handler. |
| 1067 | var bindHandler = function(handler) { |
| 1068 | return function(event) { |
| 1069 | handler(event, self, context); |
| 1070 | }; |
| 1071 | }; |
| 1072 | |
| 1073 | for (var eventName in interactionModel) { |
| 1074 | if (!interactionModel.hasOwnProperty(eventName)) continue; |
| 1075 | Dygraph.addEvent(this.mouseEventElement_, eventName, |
| 1076 | bindHandler(interactionModel[eventName])); |
| 1077 | } |
| 1078 | |
| 1079 | // If the user releases the mouse button during a drag, but not over the |
| 1080 | // canvas, then it doesn't count as a zooming action. |
| 1081 | Dygraph.addEvent(document, 'mouseup', function(event) { |
| 1082 | if (context.isZooming || context.isPanning) { |
| 1083 | context.isZooming = false; |
| 1084 | context.dragStartX = null; |
| 1085 | context.dragStartY = null; |
| 1086 | } |
| 1087 | |
| 1088 | if (context.isPanning) { |
| 1089 | context.isPanning = false; |
| 1090 | context.draggingDate = null; |
| 1091 | context.dateRange = null; |
| 1092 | for (var i = 0; i < self.axes_.length; i++) { |
| 1093 | delete self.axes_[i].draggingValue; |
| 1094 | delete self.axes_[i].dragValueRange; |
| 1095 | } |
| 1096 | } |
| 1097 | }); |
| 1098 | }; |
| 1099 | |
| 1100 | |
| 1101 | /** |
| 1102 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears |
| 1103 | * up any previous zoom rectangles that were drawn. This could be optimized to |
| 1104 | * avoid extra redrawing, but it's tricky to avoid interactions with the status |
| 1105 | * dots. |
| 1106 | * |
| 1107 | * @param {Number} direction the direction of the zoom rectangle. Acceptable |
| 1108 | * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL. |
| 1109 | * @param {Number} startX The X position where the drag started, in canvas |
| 1110 | * coordinates. |
| 1111 | * @param {Number} endX The current X position of the drag, in canvas coords. |
| 1112 | * @param {Number} startY The Y position where the drag started, in canvas |
| 1113 | * coordinates. |
| 1114 | * @param {Number} endY The current Y position of the drag, in canvas coords. |
| 1115 | * @param {Number} prevDirection the value of direction on the previous call to |
| 1116 | * this function. Used to avoid excess redrawing |
| 1117 | * @param {Number} prevEndX The value of endX on the previous call to this |
| 1118 | * function. Used to avoid excess redrawing |
| 1119 | * @param {Number} prevEndY The value of endY on the previous call to this |
| 1120 | * function. Used to avoid excess redrawing |
| 1121 | * @private |
| 1122 | */ |
| 1123 | Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY, |
| 1124 | endY, prevDirection, prevEndX, |
| 1125 | prevEndY) { |
| 1126 | var ctx = this.canvas_ctx_; |
| 1127 | |
| 1128 | // Clean up from the previous rect if necessary |
| 1129 | if (prevDirection == Dygraph.HORIZONTAL) { |
| 1130 | ctx.clearRect(Math.min(startX, prevEndX), 0, |
| 1131 | Math.abs(startX - prevEndX), this.height_); |
| 1132 | } else if (prevDirection == Dygraph.VERTICAL){ |
| 1133 | ctx.clearRect(0, Math.min(startY, prevEndY), |
| 1134 | this.width_, Math.abs(startY - prevEndY)); |
| 1135 | } |
| 1136 | |
| 1137 | // Draw a light-grey rectangle to show the new viewing area |
| 1138 | if (direction == Dygraph.HORIZONTAL) { |
| 1139 | if (endX && startX) { |
| 1140 | ctx.fillStyle = "rgba(128,128,128,0.33)"; |
| 1141 | ctx.fillRect(Math.min(startX, endX), 0, |
| 1142 | Math.abs(endX - startX), this.height_); |
| 1143 | } |
| 1144 | } |
| 1145 | if (direction == Dygraph.VERTICAL) { |
| 1146 | if (endY && startY) { |
| 1147 | ctx.fillStyle = "rgba(128,128,128,0.33)"; |
| 1148 | ctx.fillRect(0, Math.min(startY, endY), |
| 1149 | this.width_, Math.abs(endY - startY)); |
| 1150 | } |
| 1151 | } |
| 1152 | }; |
| 1153 | |
| 1154 | /** |
| 1155 | * Zoom to something containing [lowX, highX]. These are pixel coordinates in |
| 1156 | * the canvas. The exact zoom window may be slightly larger if there are no data |
| 1157 | * points near lowX or highX. Don't confuse this function with doZoomXDates, |
| 1158 | * which accepts dates that match the raw data. This function redraws the graph. |
| 1159 | * |
| 1160 | * @param {Number} lowX The leftmost pixel value that should be visible. |
| 1161 | * @param {Number} highX The rightmost pixel value that should be visible. |
| 1162 | * @private |
| 1163 | */ |
| 1164 | Dygraph.prototype.doZoomX_ = function(lowX, highX) { |
| 1165 | // Find the earliest and latest dates contained in this canvasx range. |
| 1166 | // Convert the call to date ranges of the raw data. |
| 1167 | var minDate = this.toDataXCoord(lowX); |
| 1168 | var maxDate = this.toDataXCoord(highX); |
| 1169 | this.doZoomXDates_(minDate, maxDate); |
| 1170 | }; |
| 1171 | |
| 1172 | /** |
| 1173 | * Zoom to something containing [minDate, maxDate] values. Don't confuse this |
| 1174 | * method with doZoomX which accepts pixel coordinates. This function redraws |
| 1175 | * the graph. |
| 1176 | * |
| 1177 | * @param {Number} minDate The minimum date that should be visible. |
| 1178 | * @param {Number} maxDate The maximum date that should be visible. |
| 1179 | * @private |
| 1180 | */ |
| 1181 | Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) { |
| 1182 | this.dateWindow_ = [minDate, maxDate]; |
| 1183 | this.zoomed_x_ = true; |
| 1184 | this.drawGraph_(); |
| 1185 | if (this.attr_("zoomCallback")) { |
| 1186 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); |
| 1187 | } |
| 1188 | }; |
| 1189 | |
| 1190 | /** |
| 1191 | * Zoom to something containing [lowY, highY]. These are pixel coordinates in |
| 1192 | * the canvas. This function redraws the graph. |
| 1193 | * |
| 1194 | * @param {Number} lowY The topmost pixel value that should be visible. |
| 1195 | * @param {Number} highY The lowest pixel value that should be visible. |
| 1196 | * @private |
| 1197 | */ |
| 1198 | Dygraph.prototype.doZoomY_ = function(lowY, highY) { |
| 1199 | // Find the highest and lowest values in pixel range for each axis. |
| 1200 | // Note that lowY (in pixels) corresponds to the max Value (in data coords). |
| 1201 | // This is because pixels increase as you go down on the screen, whereas data |
| 1202 | // coordinates increase as you go up the screen. |
| 1203 | var valueRanges = []; |
| 1204 | for (var i = 0; i < this.axes_.length; i++) { |
| 1205 | var hi = this.toDataYCoord(lowY, i); |
| 1206 | var low = this.toDataYCoord(highY, i); |
| 1207 | this.axes_[i].valueWindow = [low, hi]; |
| 1208 | valueRanges.push([low, hi]); |
| 1209 | } |
| 1210 | |
| 1211 | this.zoomed_y_ = true; |
| 1212 | this.drawGraph_(); |
| 1213 | if (this.attr_("zoomCallback")) { |
| 1214 | var xRange = this.xAxisRange(); |
| 1215 | var yRange = this.yAxisRange(); |
| 1216 | this.attr_("zoomCallback")(xRange[0], xRange[1], this.yAxisRanges()); |
| 1217 | } |
| 1218 | }; |
| 1219 | |
| 1220 | /** |
| 1221 | * Reset the zoom to the original view coordinates. This is the same as |
| 1222 | * double-clicking on the graph. |
| 1223 | * |
| 1224 | * @private |
| 1225 | */ |
| 1226 | Dygraph.prototype.doUnzoom_ = function() { |
| 1227 | var dirty = false; |
| 1228 | if (this.dateWindow_ != null) { |
| 1229 | dirty = true; |
| 1230 | this.dateWindow_ = null; |
| 1231 | } |
| 1232 | |
| 1233 | for (var i = 0; i < this.axes_.length; i++) { |
| 1234 | if (this.axes_[i].valueWindow != null) { |
| 1235 | dirty = true; |
| 1236 | delete this.axes_[i].valueWindow; |
| 1237 | } |
| 1238 | } |
| 1239 | |
| 1240 | // Clear any selection, since it's likely to be drawn in the wrong place. |
| 1241 | this.clearSelection(); |
| 1242 | |
| 1243 | if (dirty) { |
| 1244 | // Putting the drawing operation before the callback because it resets |
| 1245 | // yAxisRange. |
| 1246 | this.zoomed_x_ = false; |
| 1247 | this.zoomed_y_ = false; |
| 1248 | this.drawGraph_(); |
| 1249 | if (this.attr_("zoomCallback")) { |
| 1250 | var minDate = this.rawData_[0][0]; |
| 1251 | var maxDate = this.rawData_[this.rawData_.length - 1][0]; |
| 1252 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); |
| 1253 | } |
| 1254 | } |
| 1255 | }; |
| 1256 | |
| 1257 | /** |
| 1258 | * When the mouse moves in the canvas, display information about a nearby data |
| 1259 | * point and draw dots over those points in the data series. This function |
| 1260 | * takes care of cleanup of previously-drawn dots. |
| 1261 | * @param {Object} event The mousemove event from the browser. |
| 1262 | * @private |
| 1263 | */ |
| 1264 | Dygraph.prototype.mouseMove_ = function(event) { |
| 1265 | // This prevents JS errors when mousing over the canvas before data loads. |
| 1266 | var points = this.layout_.points; |
| 1267 | if (points === undefined) return; |
| 1268 | |
| 1269 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_); |
| 1270 | |
| 1271 | var lastx = -1; |
| 1272 | var lasty = -1; |
| 1273 | |
| 1274 | // Loop through all the points and find the date nearest to our current |
| 1275 | // location. |
| 1276 | var minDist = 1e+100; |
| 1277 | var idx = -1; |
| 1278 | for (var i = 0; i < points.length; i++) { |
| 1279 | var point = points[i]; |
| 1280 | if (point == null) continue; |
| 1281 | var dist = Math.abs(point.canvasx - canvasx); |
| 1282 | if (dist > minDist) continue; |
| 1283 | minDist = dist; |
| 1284 | idx = i; |
| 1285 | } |
| 1286 | if (idx >= 0) lastx = points[idx].xval; |
| 1287 | |
| 1288 | // Extract the points we've selected |
| 1289 | this.selPoints_ = []; |
| 1290 | var l = points.length; |
| 1291 | if (!this.attr_("stackedGraph")) { |
| 1292 | for (var i = 0; i < l; i++) { |
| 1293 | if (points[i].xval == lastx) { |
| 1294 | this.selPoints_.push(points[i]); |
| 1295 | } |
| 1296 | } |
| 1297 | } else { |
| 1298 | // Need to 'unstack' points starting from the bottom |
| 1299 | var cumulative_sum = 0; |
| 1300 | for (var i = l - 1; i >= 0; i--) { |
| 1301 | if (points[i].xval == lastx) { |
| 1302 | var p = {}; // Clone the point since we modify it |
| 1303 | for (var k in points[i]) { |
| 1304 | p[k] = points[i][k]; |
| 1305 | } |
| 1306 | p.yval -= cumulative_sum; |
| 1307 | cumulative_sum += p.yval; |
| 1308 | this.selPoints_.push(p); |
| 1309 | } |
| 1310 | } |
| 1311 | this.selPoints_.reverse(); |
| 1312 | } |
| 1313 | |
| 1314 | if (this.attr_("highlightCallback")) { |
| 1315 | var px = this.lastx_; |
| 1316 | if (px !== null && lastx != px) { |
| 1317 | // only fire if the selected point has changed. |
| 1318 | this.attr_("highlightCallback")(event, lastx, this.selPoints_, this.idxToRow_(idx)); |
| 1319 | } |
| 1320 | } |
| 1321 | |
| 1322 | // Save last x position for callbacks. |
| 1323 | this.lastx_ = lastx; |
| 1324 | |
| 1325 | this.updateSelection_(); |
| 1326 | }; |
| 1327 | |
| 1328 | /** |
| 1329 | * Transforms layout_.points index into data row number. |
| 1330 | * @param int layout_.points index |
| 1331 | * @return int row number, or -1 if none could be found. |
| 1332 | * @private |
| 1333 | */ |
| 1334 | Dygraph.prototype.idxToRow_ = function(idx) { |
| 1335 | if (idx < 0) return -1; |
| 1336 | |
| 1337 | for (var i in this.layout_.datasets) { |
| 1338 | if (idx < this.layout_.datasets[i].length) { |
| 1339 | return this.boundaryIds_[0][0]+idx; |
| 1340 | } |
| 1341 | idx -= this.layout_.datasets[i].length; |
| 1342 | } |
| 1343 | return -1; |
| 1344 | }; |
| 1345 | |
| 1346 | /** |
| 1347 | * @private |
| 1348 | * Generates HTML for the legend which is displayed when hovering over the |
| 1349 | * chart. If no selected points are specified, a default legend is returned |
| 1350 | * (this may just be the empty string). |
| 1351 | * @param { Number } [x] The x-value of the selected points. |
| 1352 | * @param { [Object] } [sel_points] List of selected points for the given |
| 1353 | * x-value. Should have properties like 'name', 'yval' and 'canvasy'. |
| 1354 | */ |
| 1355 | Dygraph.prototype.generateLegendHTML_ = function(x, sel_points) { |
| 1356 | // If no points are selected, we display a default legend. Traditionally, |
| 1357 | // this has been blank. But a better default would be a conventional legend, |
| 1358 | // which provides essential information for a non-interactive chart. |
| 1359 | if (typeof(x) === 'undefined') { |
| 1360 | if (this.attr_('legend') != 'always') return ''; |
| 1361 | |
| 1362 | var sepLines = this.attr_('labelsSeparateLines'); |
| 1363 | var labels = this.attr_('labels'); |
| 1364 | var html = ''; |
| 1365 | for (var i = 1; i < labels.length; i++) { |
| 1366 | if (!this.visibility()[i - 1]) continue; |
| 1367 | var c = this.plotter_.colors[labels[i]]; |
| 1368 | if (html != '') html += (sepLines ? '<br/>' : ' '); |
| 1369 | html += "<b><span style='color: " + c + ";'>—" + labels[i] + |
| 1370 | "</span></b>"; |
| 1371 | } |
| 1372 | return html; |
| 1373 | } |
| 1374 | |
| 1375 | var xOptView = this.optionsViewForAxis_('x'); |
| 1376 | var xvf = xOptView('valueFormatter'); |
| 1377 | var html = xvf(x, xOptView, this.attr_('labels')[0], this) + ":"; |
| 1378 | |
| 1379 | var yOptViews = []; |
| 1380 | var num_axes = this.numAxes(); |
| 1381 | for (var i = 0; i < num_axes; i++) { |
| 1382 | yOptViews[i] = this.optionsViewForAxis_('y' + (i ? 1 + i : '')); |
| 1383 | } |
| 1384 | var showZeros = this.attr_("labelsShowZeroValues"); |
| 1385 | var sepLines = this.attr_("labelsSeparateLines"); |
| 1386 | for (var i = 0; i < this.selPoints_.length; i++) { |
| 1387 | var pt = this.selPoints_[i]; |
| 1388 | if (pt.yval == 0 && !showZeros) continue; |
| 1389 | if (!Dygraph.isOK(pt.canvasy)) continue; |
| 1390 | if (sepLines) html += "<br/>"; |
| 1391 | |
| 1392 | var yOptView = yOptViews[this.seriesToAxisMap_[pt.name]]; |
| 1393 | var fmtFunc = yOptView('valueFormatter'); |
| 1394 | var c = this.plotter_.colors[pt.name]; |
| 1395 | var yval = fmtFunc(pt.yval, yOptView, pt.name, this); |
| 1396 | |
| 1397 | // TODO(danvk): use a template string here and make it an attribute. |
| 1398 | html += " <b><span style='color: " + c + ";'>" |
| 1399 | + pt.name + "</span></b>:" |
| 1400 | + yval; |
| 1401 | } |
| 1402 | return html; |
| 1403 | }; |
| 1404 | |
| 1405 | /** |
| 1406 | * @private |
| 1407 | * Displays information about the selected points in the legend. If there is no |
| 1408 | * selection, the legend will be cleared. |
| 1409 | * @param { Number } [x] The x-value of the selected points. |
| 1410 | * @param { [Object] } [sel_points] List of selected points for the given |
| 1411 | * x-value. Should have properties like 'name', 'yval' and 'canvasy'. |
| 1412 | */ |
| 1413 | Dygraph.prototype.setLegendHTML_ = function(x, sel_points) { |
| 1414 | var html = this.generateLegendHTML_(x, sel_points); |
| 1415 | var labelsDiv = this.attr_("labelsDiv"); |
| 1416 | if (labelsDiv !== null) { |
| 1417 | labelsDiv.innerHTML = html; |
| 1418 | } else { |
| 1419 | if (typeof(this.shown_legend_error_) == 'undefined') { |
| 1420 | this.error('labelsDiv is set to something nonexistent; legend will not be shown.'); |
| 1421 | this.shown_legend_error_ = true; |
| 1422 | } |
| 1423 | } |
| 1424 | }; |
| 1425 | |
| 1426 | /** |
| 1427 | * Draw dots over the selectied points in the data series. This function |
| 1428 | * takes care of cleanup of previously-drawn dots. |
| 1429 | * @private |
| 1430 | */ |
| 1431 | Dygraph.prototype.updateSelection_ = function() { |
| 1432 | // Clear the previously drawn vertical, if there is one |
| 1433 | var ctx = this.canvas_ctx_; |
| 1434 | if (this.previousVerticalX_ >= 0) { |
| 1435 | // Determine the maximum highlight circle size. |
| 1436 | var maxCircleSize = 0; |
| 1437 | var labels = this.attr_('labels'); |
| 1438 | for (var i = 1; i < labels.length; i++) { |
| 1439 | var r = this.attr_('highlightCircleSize', labels[i]); |
| 1440 | if (r > maxCircleSize) maxCircleSize = r; |
| 1441 | } |
| 1442 | var px = this.previousVerticalX_; |
| 1443 | ctx.clearRect(px - maxCircleSize - 1, 0, |
| 1444 | 2 * maxCircleSize + 2, this.height_); |
| 1445 | } |
| 1446 | |
| 1447 | if (this.selPoints_.length > 0) { |
| 1448 | // Set the status message to indicate the selected point(s) |
| 1449 | if (this.attr_('showLabelsOnHighlight')) { |
| 1450 | this.setLegendHTML_(this.lastx_, this.selPoints_); |
| 1451 | } |
| 1452 | |
| 1453 | // Draw colored circles over the center of each selected point |
| 1454 | var canvasx = this.selPoints_[0].canvasx; |
| 1455 | ctx.save(); |
| 1456 | for (var i = 0; i < this.selPoints_.length; i++) { |
| 1457 | var pt = this.selPoints_[i]; |
| 1458 | if (!Dygraph.isOK(pt.canvasy)) continue; |
| 1459 | |
| 1460 | var circleSize = this.attr_('highlightCircleSize', pt.name); |
| 1461 | ctx.beginPath(); |
| 1462 | ctx.fillStyle = this.plotter_.colors[pt.name]; |
| 1463 | ctx.arc(canvasx, pt.canvasy, circleSize, 0, 2 * Math.PI, false); |
| 1464 | ctx.fill(); |
| 1465 | } |
| 1466 | ctx.restore(); |
| 1467 | |
| 1468 | this.previousVerticalX_ = canvasx; |
| 1469 | } |
| 1470 | }; |
| 1471 | |
| 1472 | /** |
| 1473 | * Manually set the selected points and display information about them in the |
| 1474 | * legend. The selection can be cleared using clearSelection() and queried |
| 1475 | * using getSelection(). |
| 1476 | * @param { Integer } row number that should be highlighted (i.e. appear with |
| 1477 | * hover dots on the chart). Set to false to clear any selection. |
| 1478 | */ |
| 1479 | Dygraph.prototype.setSelection = function(row) { |
| 1480 | // Extract the points we've selected |
| 1481 | this.selPoints_ = []; |
| 1482 | var pos = 0; |
| 1483 | |
| 1484 | if (row !== false) { |
| 1485 | row = row-this.boundaryIds_[0][0]; |
| 1486 | } |
| 1487 | |
| 1488 | if (row !== false && row >= 0) { |
| 1489 | for (var i in this.layout_.datasets) { |
| 1490 | if (row < this.layout_.datasets[i].length) { |
| 1491 | var point = this.layout_.points[pos+row]; |
| 1492 | |
| 1493 | if (this.attr_("stackedGraph")) { |
| 1494 | point = this.layout_.unstackPointAtIndex(pos+row); |
| 1495 | } |
| 1496 | |
| 1497 | this.selPoints_.push(point); |
| 1498 | } |
| 1499 | pos += this.layout_.datasets[i].length; |
| 1500 | } |
| 1501 | } |
| 1502 | |
| 1503 | if (this.selPoints_.length) { |
| 1504 | this.lastx_ = this.selPoints_[0].xval; |
| 1505 | this.updateSelection_(); |
| 1506 | } else { |
| 1507 | this.clearSelection(); |
| 1508 | } |
| 1509 | |
| 1510 | }; |
| 1511 | |
| 1512 | /** |
| 1513 | * The mouse has left the canvas. Clear out whatever artifacts remain |
| 1514 | * @param {Object} event the mouseout event from the browser. |
| 1515 | * @private |
| 1516 | */ |
| 1517 | Dygraph.prototype.mouseOut_ = function(event) { |
| 1518 | if (this.attr_("unhighlightCallback")) { |
| 1519 | this.attr_("unhighlightCallback")(event); |
| 1520 | } |
| 1521 | |
| 1522 | if (this.attr_("hideOverlayOnMouseOut")) { |
| 1523 | this.clearSelection(); |
| 1524 | } |
| 1525 | }; |
| 1526 | |
| 1527 | /** |
| 1528 | * Clears the current selection (i.e. points that were highlighted by moving |
| 1529 | * the mouse over the chart). |
| 1530 | */ |
| 1531 | Dygraph.prototype.clearSelection = function() { |
| 1532 | // Get rid of the overlay data |
| 1533 | this.canvas_ctx_.clearRect(0, 0, this.width_, this.height_); |
| 1534 | this.setLegendHTML_(); |
| 1535 | this.selPoints_ = []; |
| 1536 | this.lastx_ = -1; |
| 1537 | } |
| 1538 | |
| 1539 | /** |
| 1540 | * Returns the number of the currently selected row. To get data for this row, |
| 1541 | * you can use the getValue method. |
| 1542 | * @return { Integer } row number, or -1 if nothing is selected |
| 1543 | */ |
| 1544 | Dygraph.prototype.getSelection = function() { |
| 1545 | if (!this.selPoints_ || this.selPoints_.length < 1) { |
| 1546 | return -1; |
| 1547 | } |
| 1548 | |
| 1549 | for (var row=0; row<this.layout_.points.length; row++ ) { |
| 1550 | if (this.layout_.points[row].x == this.selPoints_[0].x) { |
| 1551 | return row + this.boundaryIds_[0][0]; |
| 1552 | } |
| 1553 | } |
| 1554 | return -1; |
| 1555 | }; |
| 1556 | |
| 1557 | /** |
| 1558 | * Fires when there's data available to be graphed. |
| 1559 | * @param {String} data Raw CSV data to be plotted |
| 1560 | * @private |
| 1561 | */ |
| 1562 | Dygraph.prototype.loadedEvent_ = function(data) { |
| 1563 | this.rawData_ = this.parseCSV_(data); |
| 1564 | this.predraw_(); |
| 1565 | }; |
| 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 range; |
| 1574 | if (this.dateWindow_) { |
| 1575 | range = [this.dateWindow_[0], this.dateWindow_[1]]; |
| 1576 | } else { |
| 1577 | range = [this.rawData_[0][0], this.rawData_[this.rawData_.length - 1][0]]; |
| 1578 | } |
| 1579 | |
| 1580 | var xAxisOptionsView = this.optionsViewForAxis_('x'); |
| 1581 | var xTicks = xAxisOptionsView('ticker')( |
| 1582 | range[0], |
| 1583 | range[1], |
| 1584 | this.width_, // TODO(danvk): should be area.width |
| 1585 | xAxisOptionsView, |
| 1586 | this); |
| 1587 | // var msg = 'ticker(' + range[0] + ', ' + range[1] + ', ' + this.width_ + ', ' + this.attr_('pixelsPerXLabel') + ') -> ' + JSON.stringify(xTicks); |
| 1588 | // console.log(msg); |
| 1589 | this.layout_.setXTicks(xTicks); |
| 1590 | }; |
| 1591 | |
| 1592 | /** |
| 1593 | * @private |
| 1594 | * Computes the range of the data series (including confidence intervals). |
| 1595 | * @param { [Array] } series either [ [x1, y1], [x2, y2], ... ] or |
| 1596 | * [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... |
| 1597 | * @return [low, high] |
| 1598 | */ |
| 1599 | Dygraph.prototype.extremeValues_ = function(series) { |
| 1600 | var minY = null, maxY = null; |
| 1601 | |
| 1602 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
| 1603 | if (bars) { |
| 1604 | // With custom bars, maxY is the max of the high values. |
| 1605 | for (var j = 0; j < series.length; j++) { |
| 1606 | var y = series[j][1][0]; |
| 1607 | if (!y) continue; |
| 1608 | var low = y - series[j][1][1]; |
| 1609 | var high = y + series[j][1][2]; |
| 1610 | if (low > y) low = y; // this can happen with custom bars, |
| 1611 | if (high < y) high = y; // e.g. in tests/custom-bars.html |
| 1612 | if (maxY == null || high > maxY) { |
| 1613 | maxY = high; |
| 1614 | } |
| 1615 | if (minY == null || low < minY) { |
| 1616 | minY = low; |
| 1617 | } |
| 1618 | } |
| 1619 | } else { |
| 1620 | for (var j = 0; j < series.length; j++) { |
| 1621 | var y = series[j][1]; |
| 1622 | if (y === null || isNaN(y)) continue; |
| 1623 | if (maxY == null || y > maxY) { |
| 1624 | maxY = y; |
| 1625 | } |
| 1626 | if (minY == null || y < minY) { |
| 1627 | minY = y; |
| 1628 | } |
| 1629 | } |
| 1630 | } |
| 1631 | |
| 1632 | return [minY, maxY]; |
| 1633 | }; |
| 1634 | |
| 1635 | /** |
| 1636 | * @private |
| 1637 | * This function is called once when the chart's data is changed or the options |
| 1638 | * dictionary is updated. It is _not_ called when the user pans or zooms. The |
| 1639 | * idea is that values derived from the chart's data can be computed here, |
| 1640 | * rather than every time the chart is drawn. This includes things like the |
| 1641 | * number of axes, rolling averages, etc. |
| 1642 | */ |
| 1643 | Dygraph.prototype.predraw_ = function() { |
| 1644 | var start = new Date(); |
| 1645 | |
| 1646 | // TODO(danvk): move more computations out of drawGraph_ and into here. |
| 1647 | this.computeYAxes_(); |
| 1648 | |
| 1649 | // Create a new plotter. |
| 1650 | if (this.plotter_) this.plotter_.clear(); |
| 1651 | this.plotter_ = new DygraphCanvasRenderer(this, |
| 1652 | this.hidden_, |
| 1653 | this.hidden_ctx_, |
| 1654 | this.layout_); |
| 1655 | |
| 1656 | // The roller sits in the bottom left corner of the chart. We don't know where |
| 1657 | // this will be until the options are available, so it's positioned here. |
| 1658 | this.createRollInterface_(); |
| 1659 | |
| 1660 | // Same thing applies for the labelsDiv. It's right edge should be flush with |
| 1661 | // the right edge of the charting area (which may not be the same as the right |
| 1662 | // edge of the div, if we have two y-axes. |
| 1663 | this.positionLabelsDiv_(); |
| 1664 | |
| 1665 | // If the data or options have changed, then we'd better redraw. |
| 1666 | this.drawGraph_(); |
| 1667 | |
| 1668 | // This is used to determine whether to do various animations. |
| 1669 | var end = new Date(); |
| 1670 | this.drawingTimeMs_ = (end - start); |
| 1671 | }; |
| 1672 | |
| 1673 | /** |
| 1674 | * Update the graph with new data. This method is called when the viewing area |
| 1675 | * has changed. If the underlying data or options have changed, predraw_ will |
| 1676 | * be called before drawGraph_ is called. |
| 1677 | * |
| 1678 | * clearSelection, when undefined or true, causes this.clearSelection to be |
| 1679 | * called at the end of the draw operation. This should rarely be defined, |
| 1680 | * and never true (that is it should be undefined most of the time, and |
| 1681 | * rarely false.) |
| 1682 | * |
| 1683 | * @private |
| 1684 | */ |
| 1685 | Dygraph.prototype.drawGraph_ = function(clearSelection) { |
| 1686 | var start = new Date(); |
| 1687 | |
| 1688 | if (typeof(clearSelection) === 'undefined') { |
| 1689 | clearSelection = true; |
| 1690 | } |
| 1691 | |
| 1692 | var data = this.rawData_; |
| 1693 | |
| 1694 | // This is used to set the second parameter to drawCallback, below. |
| 1695 | var is_initial_draw = this.is_initial_draw_; |
| 1696 | this.is_initial_draw_ = false; |
| 1697 | |
| 1698 | var minY = null, maxY = null; |
| 1699 | this.layout_.removeAllDatasets(); |
| 1700 | this.setColors_(); |
| 1701 | this.attrs_['pointSize'] = 0.5 * this.attr_('highlightCircleSize'); |
| 1702 | |
| 1703 | // Loop over the fields (series). Go from the last to the first, |
| 1704 | // because if they're stacked that's how we accumulate the values. |
| 1705 | |
| 1706 | var cumulative_y = []; // For stacked series. |
| 1707 | var datasets = []; |
| 1708 | |
| 1709 | var extremes = {}; // series name -> [low, high] |
| 1710 | |
| 1711 | // Loop over all fields and create datasets |
| 1712 | for (var i = data[0].length - 1; i >= 1; i--) { |
| 1713 | if (!this.visibility()[i - 1]) continue; |
| 1714 | |
| 1715 | var seriesName = this.attr_("labels")[i]; |
| 1716 | var connectSeparatedPoints = this.attr_('connectSeparatedPoints', i); |
| 1717 | var logScale = this.attr_('logscale', i); |
| 1718 | |
| 1719 | var series = []; |
| 1720 | for (var j = 0; j < data.length; j++) { |
| 1721 | var date = data[j][0]; |
| 1722 | var point = data[j][i]; |
| 1723 | if (logScale) { |
| 1724 | // On the log scale, points less than zero do not exist. |
| 1725 | // This will create a gap in the chart. Note that this ignores |
| 1726 | // connectSeparatedPoints. |
| 1727 | if (point <= 0) { |
| 1728 | point = null; |
| 1729 | } |
| 1730 | series.push([date, point]); |
| 1731 | } else { |
| 1732 | if (point != null || !connectSeparatedPoints) { |
| 1733 | series.push([date, point]); |
| 1734 | } |
| 1735 | } |
| 1736 | } |
| 1737 | |
| 1738 | // TODO(danvk): move this into predraw_. It's insane to do it here. |
| 1739 | series = this.rollingAverage(series, this.rollPeriod_); |
| 1740 | |
| 1741 | // Prune down to the desired range, if necessary (for zooming) |
| 1742 | // Because there can be lines going to points outside of the visible area, |
| 1743 | // we actually prune to visible points, plus one on either side. |
| 1744 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
| 1745 | if (this.dateWindow_) { |
| 1746 | var low = this.dateWindow_[0]; |
| 1747 | var high= this.dateWindow_[1]; |
| 1748 | var pruned = []; |
| 1749 | // TODO(danvk): do binary search instead of linear search. |
| 1750 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. |
| 1751 | var firstIdx = null, lastIdx = null; |
| 1752 | for (var k = 0; k < series.length; k++) { |
| 1753 | if (series[k][0] >= low && firstIdx === null) { |
| 1754 | firstIdx = k; |
| 1755 | } |
| 1756 | if (series[k][0] <= high) { |
| 1757 | lastIdx = k; |
| 1758 | } |
| 1759 | } |
| 1760 | if (firstIdx === null) firstIdx = 0; |
| 1761 | if (firstIdx > 0) firstIdx--; |
| 1762 | if (lastIdx === null) lastIdx = series.length - 1; |
| 1763 | if (lastIdx < series.length - 1) lastIdx++; |
| 1764 | this.boundaryIds_[i-1] = [firstIdx, lastIdx]; |
| 1765 | for (var k = firstIdx; k <= lastIdx; k++) { |
| 1766 | pruned.push(series[k]); |
| 1767 | } |
| 1768 | series = pruned; |
| 1769 | } else { |
| 1770 | this.boundaryIds_[i-1] = [0, series.length-1]; |
| 1771 | } |
| 1772 | |
| 1773 | var seriesExtremes = this.extremeValues_(series); |
| 1774 | |
| 1775 | if (bars) { |
| 1776 | for (var j=0; j<series.length; j++) { |
| 1777 | val = [series[j][0], series[j][1][0], series[j][1][1], series[j][1][2]]; |
| 1778 | series[j] = val; |
| 1779 | } |
| 1780 | } else if (this.attr_("stackedGraph")) { |
| 1781 | var l = series.length; |
| 1782 | var actual_y; |
| 1783 | for (var j = 0; j < l; j++) { |
| 1784 | // If one data set has a NaN, let all subsequent stacked |
| 1785 | // sets inherit the NaN -- only start at 0 for the first set. |
| 1786 | var x = series[j][0]; |
| 1787 | if (cumulative_y[x] === undefined) { |
| 1788 | cumulative_y[x] = 0; |
| 1789 | } |
| 1790 | |
| 1791 | actual_y = series[j][1]; |
| 1792 | cumulative_y[x] += actual_y; |
| 1793 | |
| 1794 | series[j] = [x, cumulative_y[x]] |
| 1795 | |
| 1796 | if (cumulative_y[x] > seriesExtremes[1]) { |
| 1797 | seriesExtremes[1] = cumulative_y[x]; |
| 1798 | } |
| 1799 | if (cumulative_y[x] < seriesExtremes[0]) { |
| 1800 | seriesExtremes[0] = cumulative_y[x]; |
| 1801 | } |
| 1802 | } |
| 1803 | } |
| 1804 | extremes[seriesName] = seriesExtremes; |
| 1805 | |
| 1806 | datasets[i] = series; |
| 1807 | } |
| 1808 | |
| 1809 | for (var i = 1; i < datasets.length; i++) { |
| 1810 | if (!this.visibility()[i - 1]) continue; |
| 1811 | this.layout_.addDataset(this.attr_("labels")[i], datasets[i]); |
| 1812 | } |
| 1813 | |
| 1814 | this.computeYAxisRanges_(extremes); |
| 1815 | this.layout_.setYAxes(this.axes_); |
| 1816 | |
| 1817 | this.addXTicks_(); |
| 1818 | |
| 1819 | // Save the X axis zoomed status as the updateOptions call will tend to set it erroneously |
| 1820 | var tmp_zoomed_x = this.zoomed_x_; |
| 1821 | // Tell PlotKit to use this new data and render itself |
| 1822 | this.layout_.setDateWindow(this.dateWindow_); |
| 1823 | this.zoomed_x_ = tmp_zoomed_x; |
| 1824 | this.layout_.evaluateWithError(); |
| 1825 | this.renderGraph_(is_initial_draw, false); |
| 1826 | |
| 1827 | if (this.attr_("timingName")) { |
| 1828 | var end = new Date(); |
| 1829 | if (console) { |
| 1830 | console.log(this.attr_("timingName") + " - drawGraph: " + (end - start) + "ms") |
| 1831 | } |
| 1832 | } |
| 1833 | }; |
| 1834 | |
| 1835 | Dygraph.prototype.renderGraph_ = function(is_initial_draw, clearSelection) { |
| 1836 | this.plotter_.clear(); |
| 1837 | this.plotter_.render(); |
| 1838 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
| 1839 | this.canvas_.height); |
| 1840 | |
| 1841 | if (is_initial_draw) { |
| 1842 | // Generate a static legend before any particular point is selected. |
| 1843 | this.setLegendHTML_(); |
| 1844 | } else { |
| 1845 | if (clearSelection) { |
| 1846 | if (typeof(this.selPoints_) !== 'undefined' && this.selPoints_.length) { |
| 1847 | // We should select the point nearest the page x/y here, but it's easier |
| 1848 | // to just clear the selection. This prevents erroneous hover dots from |
| 1849 | // being displayed. |
| 1850 | this.clearSelection(); |
| 1851 | } else { |
| 1852 | this.clearSelection(); |
| 1853 | } |
| 1854 | } |
| 1855 | } |
| 1856 | |
| 1857 | if (this.attr_("drawCallback") !== null) { |
| 1858 | this.attr_("drawCallback")(this, is_initial_draw); |
| 1859 | } |
| 1860 | }; |
| 1861 | |
| 1862 | /** |
| 1863 | * @private |
| 1864 | * Determine properties of the y-axes which are independent of the data |
| 1865 | * currently being displayed. This includes things like the number of axes and |
| 1866 | * the style of the axes. It does not include the range of each axis and its |
| 1867 | * tick marks. |
| 1868 | * This fills in this.axes_ and this.seriesToAxisMap_. |
| 1869 | * axes_ = [ { options } ] |
| 1870 | * seriesToAxisMap_ = { seriesName: 0, seriesName2: 1, ... } |
| 1871 | * indices are into the axes_ array. |
| 1872 | */ |
| 1873 | Dygraph.prototype.computeYAxes_ = function() { |
| 1874 | // Preserve valueWindow settings if they exist, and if the user hasn't |
| 1875 | // specified a new valueRange. |
| 1876 | var valueWindows; |
| 1877 | if (this.axes_ != undefined && this.user_attrs_.hasOwnProperty("valueRange") == false) { |
| 1878 | valueWindows = []; |
| 1879 | for (var index = 0; index < this.axes_.length; index++) { |
| 1880 | valueWindows.push(this.axes_[index].valueWindow); |
| 1881 | } |
| 1882 | } |
| 1883 | |
| 1884 | this.axes_ = [{ yAxisId : 0, g : this }]; // always have at least one y-axis. |
| 1885 | this.seriesToAxisMap_ = {}; |
| 1886 | |
| 1887 | // Get a list of series names. |
| 1888 | var labels = this.attr_("labels"); |
| 1889 | var series = {}; |
| 1890 | for (var i = 1; i < labels.length; i++) series[labels[i]] = (i - 1); |
| 1891 | |
| 1892 | // all options which could be applied per-axis: |
| 1893 | var axisOptions = [ |
| 1894 | 'includeZero', |
| 1895 | 'valueRange', |
| 1896 | 'labelsKMB', |
| 1897 | 'labelsKMG2', |
| 1898 | 'pixelsPerYLabel', |
| 1899 | 'yAxisLabelWidth', |
| 1900 | 'axisLabelFontSize', |
| 1901 | 'axisTickSize', |
| 1902 | 'logscale' |
| 1903 | ]; |
| 1904 | |
| 1905 | // Copy global axis options over to the first axis. |
| 1906 | for (var i = 0; i < axisOptions.length; i++) { |
| 1907 | var k = axisOptions[i]; |
| 1908 | var v = this.attr_(k); |
| 1909 | if (v) this.axes_[0][k] = v; |
| 1910 | } |
| 1911 | |
| 1912 | // Go through once and add all the axes. |
| 1913 | for (var seriesName in series) { |
| 1914 | if (!series.hasOwnProperty(seriesName)) continue; |
| 1915 | var axis = this.attr_("axis", seriesName); |
| 1916 | if (axis == null) { |
| 1917 | this.seriesToAxisMap_[seriesName] = 0; |
| 1918 | continue; |
| 1919 | } |
| 1920 | if (typeof(axis) == 'object') { |
| 1921 | // Add a new axis, making a copy of its per-axis options. |
| 1922 | var opts = {}; |
| 1923 | Dygraph.update(opts, this.axes_[0]); |
| 1924 | Dygraph.update(opts, { valueRange: null }); // shouldn't inherit this. |
| 1925 | var yAxisId = this.axes_.length; |
| 1926 | opts.yAxisId = yAxisId; |
| 1927 | opts.g = this; |
| 1928 | Dygraph.update(opts, axis); |
| 1929 | this.axes_.push(opts); |
| 1930 | this.seriesToAxisMap_[seriesName] = yAxisId; |
| 1931 | } |
| 1932 | } |
| 1933 | |
| 1934 | // Go through one more time and assign series to an axis defined by another |
| 1935 | // series, e.g. { 'Y1: { axis: {} }, 'Y2': { axis: 'Y1' } } |
| 1936 | for (var seriesName in series) { |
| 1937 | if (!series.hasOwnProperty(seriesName)) continue; |
| 1938 | var axis = this.attr_("axis", seriesName); |
| 1939 | if (typeof(axis) == 'string') { |
| 1940 | if (!this.seriesToAxisMap_.hasOwnProperty(axis)) { |
| 1941 | this.error("Series " + seriesName + " wants to share a y-axis with " + |
| 1942 | "series " + axis + ", which does not define its own axis."); |
| 1943 | return null; |
| 1944 | } |
| 1945 | var idx = this.seriesToAxisMap_[axis]; |
| 1946 | this.seriesToAxisMap_[seriesName] = idx; |
| 1947 | } |
| 1948 | } |
| 1949 | |
| 1950 | // Now we remove series from seriesToAxisMap_ which are not visible. We do |
| 1951 | // this last so that hiding the first series doesn't destroy the axis |
| 1952 | // properties of the primary axis. |
| 1953 | var seriesToAxisFiltered = {}; |
| 1954 | var vis = this.visibility(); |
| 1955 | for (var i = 1; i < labels.length; i++) { |
| 1956 | var s = labels[i]; |
| 1957 | if (vis[i - 1]) seriesToAxisFiltered[s] = this.seriesToAxisMap_[s]; |
| 1958 | } |
| 1959 | this.seriesToAxisMap_ = seriesToAxisFiltered; |
| 1960 | |
| 1961 | if (valueWindows != undefined) { |
| 1962 | // Restore valueWindow settings. |
| 1963 | for (var index = 0; index < valueWindows.length; index++) { |
| 1964 | this.axes_[index].valueWindow = valueWindows[index]; |
| 1965 | } |
| 1966 | } |
| 1967 | }; |
| 1968 | |
| 1969 | /** |
| 1970 | * Returns the number of y-axes on the chart. |
| 1971 | * @return {Number} the number of axes. |
| 1972 | */ |
| 1973 | Dygraph.prototype.numAxes = function() { |
| 1974 | var last_axis = 0; |
| 1975 | for (var series in this.seriesToAxisMap_) { |
| 1976 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; |
| 1977 | var idx = this.seriesToAxisMap_[series]; |
| 1978 | if (idx > last_axis) last_axis = idx; |
| 1979 | } |
| 1980 | return 1 + last_axis; |
| 1981 | }; |
| 1982 | |
| 1983 | /** |
| 1984 | * @private |
| 1985 | * Returns axis properties for the given series. |
| 1986 | * @param { String } setName The name of the series for which to get axis |
| 1987 | * properties, e.g. 'Y1'. |
| 1988 | * @return { Object } The axis properties. |
| 1989 | */ |
| 1990 | Dygraph.prototype.axisPropertiesForSeries = function(series) { |
| 1991 | // TODO(danvk): handle errors. |
| 1992 | return this.axes_[this.seriesToAxisMap_[series]]; |
| 1993 | }; |
| 1994 | |
| 1995 | /** |
| 1996 | * @private |
| 1997 | * Determine the value range and tick marks for each axis. |
| 1998 | * @param {Object} extremes A mapping from seriesName -> [low, high] |
| 1999 | * This fills in the valueRange and ticks fields in each entry of this.axes_. |
| 2000 | */ |
| 2001 | Dygraph.prototype.computeYAxisRanges_ = function(extremes) { |
| 2002 | // Build a map from axis number -> [list of series names] |
| 2003 | var seriesForAxis = []; |
| 2004 | for (var series in this.seriesToAxisMap_) { |
| 2005 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; |
| 2006 | var idx = this.seriesToAxisMap_[series]; |
| 2007 | while (seriesForAxis.length <= idx) seriesForAxis.push([]); |
| 2008 | seriesForAxis[idx].push(series); |
| 2009 | } |
| 2010 | |
| 2011 | // Compute extreme values, a span and tick marks for each axis. |
| 2012 | for (var i = 0; i < this.axes_.length; i++) { |
| 2013 | var axis = this.axes_[i]; |
| 2014 | |
| 2015 | if (!seriesForAxis[i]) { |
| 2016 | // If no series are defined or visible then use a reasonable default |
| 2017 | axis.extremeRange = [0, 1]; |
| 2018 | } else { |
| 2019 | // Calculate the extremes of extremes. |
| 2020 | var series = seriesForAxis[i]; |
| 2021 | var minY = Infinity; // extremes[series[0]][0]; |
| 2022 | var maxY = -Infinity; // extremes[series[0]][1]; |
| 2023 | var extremeMinY, extremeMaxY; |
| 2024 | for (var j = 0; j < series.length; j++) { |
| 2025 | // Only use valid extremes to stop null data series' from corrupting the scale. |
| 2026 | extremeMinY = extremes[series[j]][0]; |
| 2027 | if (extremeMinY != null) { |
| 2028 | minY = Math.min(extremeMinY, minY); |
| 2029 | } |
| 2030 | extremeMaxY = extremes[series[j]][1]; |
| 2031 | if (extremeMaxY != null) { |
| 2032 | maxY = Math.max(extremeMaxY, maxY); |
| 2033 | } |
| 2034 | } |
| 2035 | if (axis.includeZero && minY > 0) minY = 0; |
| 2036 | |
| 2037 | // Ensure we have a valid scale, otherwise defualt to zero for safety. |
| 2038 | if (minY == Infinity) minY = 0; |
| 2039 | if (maxY == -Infinity) maxY = 0; |
| 2040 | |
| 2041 | // Add some padding and round up to an integer to be human-friendly. |
| 2042 | var span = maxY - minY; |
| 2043 | // special case: if we have no sense of scale, use +/-10% of the sole value. |
| 2044 | if (span == 0) { span = maxY; } |
| 2045 | |
| 2046 | var maxAxisY; |
| 2047 | var minAxisY; |
| 2048 | if (axis.logscale) { |
| 2049 | var maxAxisY = maxY + 0.1 * span; |
| 2050 | var minAxisY = minY; |
| 2051 | } else { |
| 2052 | var maxAxisY = maxY + 0.1 * span; |
| 2053 | var minAxisY = minY - 0.1 * span; |
| 2054 | |
| 2055 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. |
| 2056 | if (!this.attr_("avoidMinZero")) { |
| 2057 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; |
| 2058 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; |
| 2059 | } |
| 2060 | |
| 2061 | if (this.attr_("includeZero")) { |
| 2062 | if (maxY < 0) maxAxisY = 0; |
| 2063 | if (minY > 0) minAxisY = 0; |
| 2064 | } |
| 2065 | } |
| 2066 | axis.extremeRange = [minAxisY, maxAxisY]; |
| 2067 | } |
| 2068 | if (axis.valueWindow) { |
| 2069 | // This is only set if the user has zoomed on the y-axis. It is never set |
| 2070 | // by a user. It takes precedence over axis.valueRange because, if you set |
| 2071 | // valueRange, you'd still expect to be able to pan. |
| 2072 | axis.computedValueRange = [axis.valueWindow[0], axis.valueWindow[1]]; |
| 2073 | } else if (axis.valueRange) { |
| 2074 | // This is a user-set value range for this axis. |
| 2075 | axis.computedValueRange = [axis.valueRange[0], axis.valueRange[1]]; |
| 2076 | } else { |
| 2077 | axis.computedValueRange = axis.extremeRange; |
| 2078 | } |
| 2079 | |
| 2080 | // Add ticks. By default, all axes inherit the tick positions of the |
| 2081 | // primary axis. However, if an axis is specifically marked as having |
| 2082 | // independent ticks, then that is permissible as well. |
| 2083 | var opts = this.optionsViewForAxis_('y' + (i ? '2' : '')); |
| 2084 | var ticker = opts('ticker'); |
| 2085 | if (i == 0 || axis.independentTicks) { |
| 2086 | axis.ticks = ticker(axis.computedValueRange[0], |
| 2087 | axis.computedValueRange[1], |
| 2088 | this.height_, // TODO(danvk): should be area.height |
| 2089 | opts, |
| 2090 | this); |
| 2091 | } else { |
| 2092 | var p_axis = this.axes_[0]; |
| 2093 | var p_ticks = p_axis.ticks; |
| 2094 | var p_scale = p_axis.computedValueRange[1] - p_axis.computedValueRange[0]; |
| 2095 | var scale = axis.computedValueRange[1] - axis.computedValueRange[0]; |
| 2096 | var tick_values = []; |
| 2097 | for (var k = 0; k < p_ticks.length; k++) { |
| 2098 | var y_frac = (p_ticks[k].v - p_axis.computedValueRange[0]) / p_scale; |
| 2099 | var y_val = axis.computedValueRange[0] + y_frac * scale; |
| 2100 | tick_values.push(y_val); |
| 2101 | } |
| 2102 | |
| 2103 | axis.ticks = ticker(axis.computedValueRange[0], |
| 2104 | axis.computedValueRange[1], |
| 2105 | this.height_, // TODO(danvk): should be area.height |
| 2106 | opts, |
| 2107 | this, |
| 2108 | tick_values); |
| 2109 | } |
| 2110 | } |
| 2111 | }; |
| 2112 | |
| 2113 | /** |
| 2114 | * @private |
| 2115 | * Calculates the rolling average of a data set. |
| 2116 | * If originalData is [label, val], rolls the average of those. |
| 2117 | * If originalData is [label, [, it's interpreted as [value, stddev] |
| 2118 | * and the roll is returned in the same form, with appropriately reduced |
| 2119 | * stddev for each value. |
| 2120 | * Note that this is where fractional input (i.e. '5/10') is converted into |
| 2121 | * decimal values. |
| 2122 | * @param {Array} originalData The data in the appropriate format (see above) |
| 2123 | * @param {Number} rollPeriod The number of points over which to average the |
| 2124 | * data |
| 2125 | */ |
| 2126 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
| 2127 | if (originalData.length < 2) |
| 2128 | return originalData; |
| 2129 | var rollPeriod = Math.min(rollPeriod, originalData.length); |
| 2130 | var rollingData = []; |
| 2131 | var sigma = this.attr_("sigma"); |
| 2132 | |
| 2133 | if (this.fractions_) { |
| 2134 | var num = 0; |
| 2135 | var den = 0; // numerator/denominator |
| 2136 | var mult = 100.0; |
| 2137 | for (var i = 0; i < originalData.length; i++) { |
| 2138 | num += originalData[i][1][0]; |
| 2139 | den += originalData[i][1][1]; |
| 2140 | if (i - rollPeriod >= 0) { |
| 2141 | num -= originalData[i - rollPeriod][1][0]; |
| 2142 | den -= originalData[i - rollPeriod][1][1]; |
| 2143 | } |
| 2144 | |
| 2145 | var date = originalData[i][0]; |
| 2146 | var value = den ? num / den : 0.0; |
| 2147 | if (this.attr_("errorBars")) { |
| 2148 | if (this.wilsonInterval_) { |
| 2149 | // For more details on this confidence interval, see: |
| 2150 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval |
| 2151 | if (den) { |
| 2152 | var p = value < 0 ? 0 : value, n = den; |
| 2153 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); |
| 2154 | var denom = 1 + sigma * sigma / den; |
| 2155 | var low = (p + sigma * sigma / (2 * den) - pm) / denom; |
| 2156 | var high = (p + sigma * sigma / (2 * den) + pm) / denom; |
| 2157 | rollingData[i] = [date, |
| 2158 | [p * mult, (p - low) * mult, (high - p) * mult]]; |
| 2159 | } else { |
| 2160 | rollingData[i] = [date, [0, 0, 0]]; |
| 2161 | } |
| 2162 | } else { |
| 2163 | var stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; |
| 2164 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; |
| 2165 | } |
| 2166 | } else { |
| 2167 | rollingData[i] = [date, mult * value]; |
| 2168 | } |
| 2169 | } |
| 2170 | } else if (this.attr_("customBars")) { |
| 2171 | var low = 0; |
| 2172 | var mid = 0; |
| 2173 | var high = 0; |
| 2174 | var count = 0; |
| 2175 | for (var i = 0; i < originalData.length; i++) { |
| 2176 | var data = originalData[i][1]; |
| 2177 | var y = data[1]; |
| 2178 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; |
| 2179 | |
| 2180 | if (y != null && !isNaN(y)) { |
| 2181 | low += data[0]; |
| 2182 | mid += y; |
| 2183 | high += data[2]; |
| 2184 | count += 1; |
| 2185 | } |
| 2186 | if (i - rollPeriod >= 0) { |
| 2187 | var prev = originalData[i - rollPeriod]; |
| 2188 | if (prev[1][1] != null && !isNaN(prev[1][1])) { |
| 2189 | low -= prev[1][0]; |
| 2190 | mid -= prev[1][1]; |
| 2191 | high -= prev[1][2]; |
| 2192 | count -= 1; |
| 2193 | } |
| 2194 | } |
| 2195 | if (count) { |
| 2196 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, |
| 2197 | 1.0 * (mid - low) / count, |
| 2198 | 1.0 * (high - mid) / count ]]; |
| 2199 | } else { |
| 2200 | rollingData[i] = [originalData[i][0], [null, null, null]]; |
| 2201 | } |
| 2202 | } |
| 2203 | } else { |
| 2204 | // Calculate the rolling average for the first rollPeriod - 1 points where |
| 2205 | // there is not enough data to roll over the full number of points |
| 2206 | var num_init_points = Math.min(rollPeriod - 1, originalData.length - 2); |
| 2207 | if (!this.attr_("errorBars")){ |
| 2208 | if (rollPeriod == 1) { |
| 2209 | return originalData; |
| 2210 | } |
| 2211 | |
| 2212 | for (var i = 0; i < originalData.length; i++) { |
| 2213 | var sum = 0; |
| 2214 | var num_ok = 0; |
| 2215 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
| 2216 | var y = originalData[j][1]; |
| 2217 | if (y == null || isNaN(y)) continue; |
| 2218 | num_ok++; |
| 2219 | sum += originalData[j][1]; |
| 2220 | } |
| 2221 | if (num_ok) { |
| 2222 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
| 2223 | } else { |
| 2224 | rollingData[i] = [originalData[i][0], null]; |
| 2225 | } |
| 2226 | } |
| 2227 | |
| 2228 | } else { |
| 2229 | for (var i = 0; i < originalData.length; i++) { |
| 2230 | var sum = 0; |
| 2231 | var variance = 0; |
| 2232 | var num_ok = 0; |
| 2233 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
| 2234 | var y = originalData[j][1][0]; |
| 2235 | if (y == null || isNaN(y)) continue; |
| 2236 | num_ok++; |
| 2237 | sum += originalData[j][1][0]; |
| 2238 | variance += Math.pow(originalData[j][1][1], 2); |
| 2239 | } |
| 2240 | if (num_ok) { |
| 2241 | var stddev = Math.sqrt(variance) / num_ok; |
| 2242 | rollingData[i] = [originalData[i][0], |
| 2243 | [sum / num_ok, sigma * stddev, sigma * stddev]]; |
| 2244 | } else { |
| 2245 | rollingData[i] = [originalData[i][0], [null, null, null]]; |
| 2246 | } |
| 2247 | } |
| 2248 | } |
| 2249 | } |
| 2250 | |
| 2251 | return rollingData; |
| 2252 | }; |
| 2253 | |
| 2254 | /** |
| 2255 | * Detects the type of the str (date or numeric) and sets the various |
| 2256 | * formatting attributes in this.attrs_ based on this type. |
| 2257 | * @param {String} str An x value. |
| 2258 | * @private |
| 2259 | */ |
| 2260 | Dygraph.prototype.detectTypeFromString_ = function(str) { |
| 2261 | var isDate = false; |
| 2262 | if (str.indexOf('-') > 0 || |
| 2263 | str.indexOf('/') >= 0 || |
| 2264 | isNaN(parseFloat(str))) { |
| 2265 | isDate = true; |
| 2266 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { |
| 2267 | // TODO(danvk): remove support for this format. |
| 2268 | isDate = true; |
| 2269 | } |
| 2270 | |
| 2271 | if (isDate) { |
| 2272 | this.attrs_.xValueParser = Dygraph.dateParser; |
| 2273 | this.attrs_.axes.x.valueFormatter = Dygraph.dateString_; |
| 2274 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; |
| 2275 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisFormatter; |
| 2276 | } else { |
| 2277 | /** @private (shut up, jsdoc!) */ |
| 2278 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
| 2279 | // TODO(danvk): use Dygraph.numberValueFormatter here? |
| 2280 | /** @private (shut up, jsdoc!) */ |
| 2281 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; |
| 2282 | this.attrs_.axes.x.ticker = Dygraph.numericTicks; |
| 2283 | this.attrs_.axes.x.axisLabelFormatter = this.attrs_.axes.x.valueFormatter; |
| 2284 | } |
| 2285 | }; |
| 2286 | |
| 2287 | /** |
| 2288 | * Parses the value as a floating point number. This is like the parseFloat() |
| 2289 | * built-in, but with a few differences: |
| 2290 | * - the empty string is parsed as null, rather than NaN. |
| 2291 | * - if the string cannot be parsed at all, an error is logged. |
| 2292 | * If the string can't be parsed, this method returns null. |
| 2293 | * @param {String} x The string to be parsed |
| 2294 | * @param {Number} opt_line_no The line number from which the string comes. |
| 2295 | * @param {String} opt_line The text of the line from which the string comes. |
| 2296 | * @private |
| 2297 | */ |
| 2298 | |
| 2299 | // Parse the x as a float or return null if it's not a number. |
| 2300 | Dygraph.prototype.parseFloat_ = function(x, opt_line_no, opt_line) { |
| 2301 | var val = parseFloat(x); |
| 2302 | if (!isNaN(val)) return val; |
| 2303 | |
| 2304 | // Try to figure out what happeend. |
| 2305 | // If the value is the empty string, parse it as null. |
| 2306 | if (/^ *$/.test(x)) return null; |
| 2307 | |
| 2308 | // If it was actually "NaN", return it as NaN. |
| 2309 | if (/^ *nan *$/i.test(x)) return NaN; |
| 2310 | |
| 2311 | // Looks like a parsing error. |
| 2312 | var msg = "Unable to parse '" + x + "' as a number"; |
| 2313 | if (opt_line !== null && opt_line_no !== null) { |
| 2314 | msg += " on line " + (1+opt_line_no) + " ('" + opt_line + "') of CSV."; |
| 2315 | } |
| 2316 | this.error(msg); |
| 2317 | |
| 2318 | return null; |
| 2319 | }; |
| 2320 | |
| 2321 | /** |
| 2322 | * @private |
| 2323 | * Parses a string in a special csv format. We expect a csv file where each |
| 2324 | * line is a date point, and the first field in each line is the date string. |
| 2325 | * We also expect that all remaining fields represent series. |
| 2326 | * if the errorBars attribute is set, then interpret the fields as: |
| 2327 | * date, series1, stddev1, series2, stddev2, ... |
| 2328 | * @param {[Object]} data See above. |
| 2329 | * |
| 2330 | * @return [Object] An array with one entry for each row. These entries |
| 2331 | * are an array of cells in that row. The first entry is the parsed x-value for |
| 2332 | * the row. The second, third, etc. are the y-values. These can take on one of |
| 2333 | * three forms, depending on the CSV and constructor parameters: |
| 2334 | * 1. numeric value |
| 2335 | * 2. [ value, stddev ] |
| 2336 | * 3. [ low value, center value, high value ] |
| 2337 | */ |
| 2338 | Dygraph.prototype.parseCSV_ = function(data) { |
| 2339 | var ret = []; |
| 2340 | var lines = data.split("\n"); |
| 2341 | |
| 2342 | // Use the default delimiter or fall back to a tab if that makes sense. |
| 2343 | var delim = this.attr_('delimiter'); |
| 2344 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { |
| 2345 | delim = '\t'; |
| 2346 | } |
| 2347 | |
| 2348 | var start = 0; |
| 2349 | if (!('labels' in this.user_attrs_)) { |
| 2350 | // User hasn't explicitly set labels, so they're (presumably) in the CSV. |
| 2351 | start = 1; |
| 2352 | this.attrs_.labels = lines[0].split(delim); // NOTE: _not_ user_attrs_. |
| 2353 | } |
| 2354 | var line_no = 0; |
| 2355 | |
| 2356 | var xParser; |
| 2357 | var defaultParserSet = false; // attempt to auto-detect x value type |
| 2358 | var expectedCols = this.attr_("labels").length; |
| 2359 | var outOfOrder = false; |
| 2360 | for (var i = start; i < lines.length; i++) { |
| 2361 | var line = lines[i]; |
| 2362 | line_no = i; |
| 2363 | if (line.length == 0) continue; // skip blank lines |
| 2364 | if (line[0] == '#') continue; // skip comment lines |
| 2365 | var inFields = line.split(delim); |
| 2366 | if (inFields.length < 2) continue; |
| 2367 | |
| 2368 | var fields = []; |
| 2369 | if (!defaultParserSet) { |
| 2370 | this.detectTypeFromString_(inFields[0]); |
| 2371 | xParser = this.attr_("xValueParser"); |
| 2372 | defaultParserSet = true; |
| 2373 | } |
| 2374 | fields[0] = xParser(inFields[0], this); |
| 2375 | |
| 2376 | // If fractions are expected, parse the numbers as "A/B" |
| 2377 | if (this.fractions_) { |
| 2378 | for (var j = 1; j < inFields.length; j++) { |
| 2379 | // TODO(danvk): figure out an appropriate way to flag parse errors. |
| 2380 | var vals = inFields[j].split("/"); |
| 2381 | if (vals.length != 2) { |
| 2382 | this.error('Expected fractional "num/den" values in CSV data ' + |
| 2383 | "but found a value '" + inFields[j] + "' on line " + |
| 2384 | (1 + i) + " ('" + line + "') which is not of this form."); |
| 2385 | fields[j] = [0, 0]; |
| 2386 | } else { |
| 2387 | fields[j] = [this.parseFloat_(vals[0], i, line), |
| 2388 | this.parseFloat_(vals[1], i, line)]; |
| 2389 | } |
| 2390 | } |
| 2391 | } else if (this.attr_("errorBars")) { |
| 2392 | // If there are error bars, values are (value, stddev) pairs |
| 2393 | if (inFields.length % 2 != 1) { |
| 2394 | this.error('Expected alternating (value, stdev.) pairs in CSV data ' + |
| 2395 | 'but line ' + (1 + i) + ' has an odd number of values (' + |
| 2396 | (inFields.length - 1) + "): '" + line + "'"); |
| 2397 | } |
| 2398 | for (var j = 1; j < inFields.length; j += 2) { |
| 2399 | fields[(j + 1) / 2] = [this.parseFloat_(inFields[j], i, line), |
| 2400 | this.parseFloat_(inFields[j + 1], i, line)]; |
| 2401 | } |
| 2402 | } else if (this.attr_("customBars")) { |
| 2403 | // Bars are a low;center;high tuple |
| 2404 | for (var j = 1; j < inFields.length; j++) { |
| 2405 | var val = inFields[j]; |
| 2406 | if (/^ *$/.test(val)) { |
| 2407 | fields[j] = [null, null, null]; |
| 2408 | } else { |
| 2409 | var vals = val.split(";"); |
| 2410 | if (vals.length == 3) { |
| 2411 | fields[j] = [ this.parseFloat_(vals[0], i, line), |
| 2412 | this.parseFloat_(vals[1], i, line), |
| 2413 | this.parseFloat_(vals[2], i, line) ]; |
| 2414 | } else { |
| 2415 | this.warning('When using customBars, values must be either blank ' + |
| 2416 | 'or "low;center;high" tuples (got "' + val + |
| 2417 | '" on line ' + (1+i)); |
| 2418 | } |
| 2419 | } |
| 2420 | } |
| 2421 | } else { |
| 2422 | // Values are just numbers |
| 2423 | for (var j = 1; j < inFields.length; j++) { |
| 2424 | fields[j] = this.parseFloat_(inFields[j], i, line); |
| 2425 | } |
| 2426 | } |
| 2427 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
| 2428 | outOfOrder = true; |
| 2429 | } |
| 2430 | |
| 2431 | if (fields.length != expectedCols) { |
| 2432 | this.error("Number of columns in line " + i + " (" + fields.length + |
| 2433 | ") does not agree with number of labels (" + expectedCols + |
| 2434 | ") " + line); |
| 2435 | } |
| 2436 | |
| 2437 | // If the user specified the 'labels' option and none of the cells of the |
| 2438 | // first row parsed correctly, then they probably double-specified the |
| 2439 | // labels. We go with the values set in the option, discard this row and |
| 2440 | // log a warning to the JS console. |
| 2441 | if (i == 0 && this.attr_('labels')) { |
| 2442 | var all_null = true; |
| 2443 | for (var j = 0; all_null && j < fields.length; j++) { |
| 2444 | if (fields[j]) all_null = false; |
| 2445 | } |
| 2446 | if (all_null) { |
| 2447 | this.warn("The dygraphs 'labels' option is set, but the first row of " + |
| 2448 | "CSV data ('" + line + "') appears to also contain labels. " + |
| 2449 | "Will drop the CSV labels and use the option labels."); |
| 2450 | continue; |
| 2451 | } |
| 2452 | } |
| 2453 | ret.push(fields); |
| 2454 | } |
| 2455 | |
| 2456 | if (outOfOrder) { |
| 2457 | this.warn("CSV is out of order; order it correctly to speed loading."); |
| 2458 | ret.sort(function(a,b) { return a[0] - b[0] }); |
| 2459 | } |
| 2460 | |
| 2461 | return ret; |
| 2462 | }; |
| 2463 | |
| 2464 | /** |
| 2465 | * @private |
| 2466 | * The user has provided their data as a pre-packaged JS array. If the x values |
| 2467 | * are numeric, this is the same as dygraphs' internal format. If the x values |
| 2468 | * are dates, we need to convert them from Date objects to ms since epoch. |
| 2469 | * @param {[Object]} data |
| 2470 | * @return {[Object]} data with numeric x values. |
| 2471 | */ |
| 2472 | Dygraph.prototype.parseArray_ = function(data) { |
| 2473 | // Peek at the first x value to see if it's numeric. |
| 2474 | if (data.length == 0) { |
| 2475 | this.error("Can't plot empty data set"); |
| 2476 | return null; |
| 2477 | } |
| 2478 | if (data[0].length == 0) { |
| 2479 | this.error("Data set cannot contain an empty row"); |
| 2480 | return null; |
| 2481 | } |
| 2482 | |
| 2483 | if (this.attr_("labels") == null) { |
| 2484 | this.warn("Using default labels. Set labels explicitly via 'labels' " + |
| 2485 | "in the options parameter"); |
| 2486 | this.attrs_.labels = [ "X" ]; |
| 2487 | for (var i = 1; i < data[0].length; i++) { |
| 2488 | this.attrs_.labels.push("Y" + i); |
| 2489 | } |
| 2490 | } |
| 2491 | |
| 2492 | if (Dygraph.isDateLike(data[0][0])) { |
| 2493 | // Some intelligent defaults for a date x-axis. |
| 2494 | this.attrs_.axes.x.valueFormatter = Dygraph.dateString_; |
| 2495 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisFormatter; |
| 2496 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; |
| 2497 | |
| 2498 | // Assume they're all dates. |
| 2499 | var parsedData = Dygraph.clone(data); |
| 2500 | for (var i = 0; i < data.length; i++) { |
| 2501 | if (parsedData[i].length == 0) { |
| 2502 | this.error("Row " + (1 + i) + " of data is empty"); |
| 2503 | return null; |
| 2504 | } |
| 2505 | if (parsedData[i][0] == null |
| 2506 | || typeof(parsedData[i][0].getTime) != 'function' |
| 2507 | || isNaN(parsedData[i][0].getTime())) { |
| 2508 | this.error("x value in row " + (1 + i) + " is not a Date"); |
| 2509 | return null; |
| 2510 | } |
| 2511 | parsedData[i][0] = parsedData[i][0].getTime(); |
| 2512 | } |
| 2513 | return parsedData; |
| 2514 | } else { |
| 2515 | // Some intelligent defaults for a numeric x-axis. |
| 2516 | /** @private (shut up, jsdoc!) */ |
| 2517 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; |
| 2518 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.numberAxisLabelFormatter; |
| 2519 | this.attrs_.axes.x.ticker = Dygraph.numericTicks; |
| 2520 | return data; |
| 2521 | } |
| 2522 | }; |
| 2523 | |
| 2524 | /** |
| 2525 | * Parses a DataTable object from gviz. |
| 2526 | * The data is expected to have a first column that is either a date or a |
| 2527 | * number. All subsequent columns must be numbers. If there is a clear mismatch |
| 2528 | * between this.xValueParser_ and the type of the first column, it will be |
| 2529 | * fixed. Fills out rawData_. |
| 2530 | * @param {[Object]} data See above. |
| 2531 | * @private |
| 2532 | */ |
| 2533 | Dygraph.prototype.parseDataTable_ = function(data) { |
| 2534 | var cols = data.getNumberOfColumns(); |
| 2535 | var rows = data.getNumberOfRows(); |
| 2536 | |
| 2537 | var indepType = data.getColumnType(0); |
| 2538 | if (indepType == 'date' || indepType == 'datetime') { |
| 2539 | this.attrs_.xValueParser = Dygraph.dateParser; |
| 2540 | this.attrs_.axes.x.valueFormatter = Dygraph.dateString_; |
| 2541 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; |
| 2542 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisFormatter; |
| 2543 | } else if (indepType == 'number') { |
| 2544 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
| 2545 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; |
| 2546 | this.attrs_.axes.x.ticker = Dygraph.numericTicks; |
| 2547 | this.attrs_.axes.x.axisLabelFormatter = this.attrs_.axes.x.valueFormatter; |
| 2548 | } else { |
| 2549 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
| 2550 | "column 1 of DataTable input (Got '" + indepType + "')"); |
| 2551 | return null; |
| 2552 | } |
| 2553 | |
| 2554 | // Array of the column indices which contain data (and not annotations). |
| 2555 | var colIdx = []; |
| 2556 | var annotationCols = {}; // data index -> [annotation cols] |
| 2557 | var hasAnnotations = false; |
| 2558 | for (var i = 1; i < cols; i++) { |
| 2559 | var type = data.getColumnType(i); |
| 2560 | if (type == 'number') { |
| 2561 | colIdx.push(i); |
| 2562 | } else if (type == 'string' && this.attr_('displayAnnotations')) { |
| 2563 | // This is OK -- it's an annotation column. |
| 2564 | var dataIdx = colIdx[colIdx.length - 1]; |
| 2565 | if (!annotationCols.hasOwnProperty(dataIdx)) { |
| 2566 | annotationCols[dataIdx] = [i]; |
| 2567 | } else { |
| 2568 | annotationCols[dataIdx].push(i); |
| 2569 | } |
| 2570 | hasAnnotations = true; |
| 2571 | } else { |
| 2572 | this.error("Only 'number' is supported as a dependent type with Gviz." + |
| 2573 | " 'string' is only supported if displayAnnotations is true"); |
| 2574 | } |
| 2575 | } |
| 2576 | |
| 2577 | // Read column labels |
| 2578 | // TODO(danvk): add support back for errorBars |
| 2579 | var labels = [data.getColumnLabel(0)]; |
| 2580 | for (var i = 0; i < colIdx.length; i++) { |
| 2581 | labels.push(data.getColumnLabel(colIdx[i])); |
| 2582 | if (this.attr_("errorBars")) i += 1; |
| 2583 | } |
| 2584 | this.attrs_.labels = labels; |
| 2585 | cols = labels.length; |
| 2586 | |
| 2587 | var ret = []; |
| 2588 | var outOfOrder = false; |
| 2589 | var annotations = []; |
| 2590 | for (var i = 0; i < rows; i++) { |
| 2591 | var row = []; |
| 2592 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
| 2593 | data.getValue(i, 0) === null) { |
| 2594 | this.warn("Ignoring row " + i + |
| 2595 | " of DataTable because of undefined or null first column."); |
| 2596 | continue; |
| 2597 | } |
| 2598 | |
| 2599 | if (indepType == 'date' || indepType == 'datetime') { |
| 2600 | row.push(data.getValue(i, 0).getTime()); |
| 2601 | } else { |
| 2602 | row.push(data.getValue(i, 0)); |
| 2603 | } |
| 2604 | if (!this.attr_("errorBars")) { |
| 2605 | for (var j = 0; j < colIdx.length; j++) { |
| 2606 | var col = colIdx[j]; |
| 2607 | row.push(data.getValue(i, col)); |
| 2608 | if (hasAnnotations && |
| 2609 | annotationCols.hasOwnProperty(col) && |
| 2610 | data.getValue(i, annotationCols[col][0]) != null) { |
| 2611 | var ann = {}; |
| 2612 | ann.series = data.getColumnLabel(col); |
| 2613 | ann.xval = row[0]; |
| 2614 | ann.shortText = String.fromCharCode(65 /* A */ + annotations.length) |
| 2615 | ann.text = ''; |
| 2616 | for (var k = 0; k < annotationCols[col].length; k++) { |
| 2617 | if (k) ann.text += "\n"; |
| 2618 | ann.text += data.getValue(i, annotationCols[col][k]); |
| 2619 | } |
| 2620 | annotations.push(ann); |
| 2621 | } |
| 2622 | } |
| 2623 | |
| 2624 | // Strip out infinities, which give dygraphs problems later on. |
| 2625 | for (var j = 0; j < row.length; j++) { |
| 2626 | if (!isFinite(row[j])) row[j] = null; |
| 2627 | } |
| 2628 | } else { |
| 2629 | for (var j = 0; j < cols - 1; j++) { |
| 2630 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); |
| 2631 | } |
| 2632 | } |
| 2633 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
| 2634 | outOfOrder = true; |
| 2635 | } |
| 2636 | ret.push(row); |
| 2637 | } |
| 2638 | |
| 2639 | if (outOfOrder) { |
| 2640 | this.warn("DataTable is out of order; order it correctly to speed loading."); |
| 2641 | ret.sort(function(a,b) { return a[0] - b[0] }); |
| 2642 | } |
| 2643 | this.rawData_ = ret; |
| 2644 | |
| 2645 | if (annotations.length > 0) { |
| 2646 | this.setAnnotations(annotations, true); |
| 2647 | } |
| 2648 | } |
| 2649 | |
| 2650 | /** |
| 2651 | * Get the CSV data. If it's in a function, call that function. If it's in a |
| 2652 | * file, do an XMLHttpRequest to get it. |
| 2653 | * @private |
| 2654 | */ |
| 2655 | Dygraph.prototype.start_ = function() { |
| 2656 | if (typeof this.file_ == 'function') { |
| 2657 | // CSV string. Pretend we got it via XHR. |
| 2658 | this.loadedEvent_(this.file_()); |
| 2659 | } else if (Dygraph.isArrayLike(this.file_)) { |
| 2660 | this.rawData_ = this.parseArray_(this.file_); |
| 2661 | this.predraw_(); |
| 2662 | } else if (typeof this.file_ == 'object' && |
| 2663 | typeof this.file_.getColumnRange == 'function') { |
| 2664 | // must be a DataTable from gviz. |
| 2665 | this.parseDataTable_(this.file_); |
| 2666 | this.predraw_(); |
| 2667 | } else if (typeof this.file_ == 'string') { |
| 2668 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. |
| 2669 | if (this.file_.indexOf('\n') >= 0) { |
| 2670 | this.loadedEvent_(this.file_); |
| 2671 | } else { |
| 2672 | var req = new XMLHttpRequest(); |
| 2673 | var caller = this; |
| 2674 | req.onreadystatechange = function () { |
| 2675 | if (req.readyState == 4) { |
| 2676 | if (req.status == 200 || // Normal http |
| 2677 | req.status == 0) { // Chrome w/ --allow-file-access-from-files |
| 2678 | caller.loadedEvent_(req.responseText); |
| 2679 | } |
| 2680 | } |
| 2681 | }; |
| 2682 | |
| 2683 | req.open("GET", this.file_, true); |
| 2684 | req.send(null); |
| 2685 | } |
| 2686 | } else { |
| 2687 | this.error("Unknown data format: " + (typeof this.file_)); |
| 2688 | } |
| 2689 | }; |
| 2690 | |
| 2691 | /** |
| 2692 | * Changes various properties of the graph. These can include: |
| 2693 | * <ul> |
| 2694 | * <li>file: changes the source data for the graph</li> |
| 2695 | * <li>errorBars: changes whether the data contains stddev</li> |
| 2696 | * </ul> |
| 2697 | * |
| 2698 | * There's a huge variety of options that can be passed to this method. For a |
| 2699 | * full list, see http://dygraphs.com/options.html. |
| 2700 | * |
| 2701 | * @param {Object} attrs The new properties and values |
| 2702 | * @param {Boolean} [block_redraw] Usually the chart is redrawn after every |
| 2703 | * call to updateOptions(). If you know better, you can pass true to explicitly |
| 2704 | * block the redraw. This can be useful for chaining updateOptions() calls, |
| 2705 | * avoiding the occasional infinite loop and preventing redraws when it's not |
| 2706 | * necessary (e.g. when updating a callback). |
| 2707 | */ |
| 2708 | Dygraph.prototype.updateOptions = function(input_attrs, block_redraw) { |
| 2709 | if (typeof(block_redraw) == 'undefined') block_redraw = false; |
| 2710 | |
| 2711 | // mapLegacyOptions_ drops the "file" parameter as a convenience to us. |
| 2712 | var file = input_attrs['file']; |
| 2713 | var attrs = Dygraph.mapLegacyOptions_(input_attrs); |
| 2714 | |
| 2715 | // TODO(danvk): this is a mess. Move these options into attr_. |
| 2716 | if ('rollPeriod' in attrs) { |
| 2717 | this.rollPeriod_ = attrs.rollPeriod; |
| 2718 | } |
| 2719 | if ('dateWindow' in attrs) { |
| 2720 | this.dateWindow_ = attrs.dateWindow; |
| 2721 | if (!('isZoomedIgnoreProgrammaticZoom' in attrs)) { |
| 2722 | this.zoomed_x_ = attrs.dateWindow != null; |
| 2723 | } |
| 2724 | } |
| 2725 | if ('valueRange' in attrs && !('isZoomedIgnoreProgrammaticZoom' in attrs)) { |
| 2726 | this.zoomed_y_ = attrs.valueRange != null; |
| 2727 | } |
| 2728 | |
| 2729 | // TODO(danvk): validate per-series options. |
| 2730 | // Supported: |
| 2731 | // strokeWidth |
| 2732 | // pointSize |
| 2733 | // drawPoints |
| 2734 | // highlightCircleSize |
| 2735 | |
| 2736 | // Check if this set options will require new points. |
| 2737 | var requiresNewPoints = Dygraph.isPixelChangingOptionList(this.attr_("labels"), attrs); |
| 2738 | |
| 2739 | Dygraph.updateDeep(this.user_attrs_, attrs); |
| 2740 | |
| 2741 | if (file) { |
| 2742 | this.file_ = file; |
| 2743 | if (!block_redraw) this.start_(); |
| 2744 | } else { |
| 2745 | if (!block_redraw) { |
| 2746 | if (requiresNewPoints) { |
| 2747 | this.predraw_(); |
| 2748 | } else { |
| 2749 | this.renderGraph_(false, false); |
| 2750 | } |
| 2751 | } |
| 2752 | } |
| 2753 | }; |
| 2754 | |
| 2755 | /** |
| 2756 | * Returns a copy of the options with deprecated names converted into current |
| 2757 | * names. Also drops the (potentially-large) 'file' attribute. If the caller is |
| 2758 | * interested in that, they should save a copy before calling this. |
| 2759 | * @private |
| 2760 | */ |
| 2761 | Dygraph.mapLegacyOptions_ = function(attrs) { |
| 2762 | var my_attrs = {}; |
| 2763 | for (var k in attrs) { |
| 2764 | if (k == 'file') continue; |
| 2765 | if (attrs.hasOwnProperty(k)) my_attrs[k] = attrs[k]; |
| 2766 | } |
| 2767 | |
| 2768 | var set = function(axis, opt, value) { |
| 2769 | if (!my_attrs.axes) my_attrs.axes = {}; |
| 2770 | if (!my_attrs.axes[axis]) my_attrs.axes[axis] = {}; |
| 2771 | my_attrs.axes[axis][opt] = value; |
| 2772 | }; |
| 2773 | var map = function(opt, axis, new_opt) { |
| 2774 | if (typeof(attrs[opt]) != 'undefined') { |
| 2775 | set(axis, new_opt, attrs[opt]); |
| 2776 | delete my_attrs[opt]; |
| 2777 | } |
| 2778 | }; |
| 2779 | |
| 2780 | // This maps, e.g., xValueFormater -> axes: { x: { valueFormatter: ... } } |
| 2781 | map('xValueFormatter', 'x', 'valueFormatter'); |
| 2782 | map('pixelsPerXLabel', 'x', 'pixelsPerLabel'); |
| 2783 | map('xAxisLabelFormatter', 'x', 'axisLabelFormatter'); |
| 2784 | map('xTicker', 'x', 'ticker'); |
| 2785 | map('yValueFormatter', 'y', 'valueFormatter'); |
| 2786 | map('pixelsPerYLabel', 'y', 'pixelsPerLabel'); |
| 2787 | map('yAxisLabelFormatter', 'y', 'axisLabelFormatter'); |
| 2788 | map('yTicker', 'y', 'ticker'); |
| 2789 | return my_attrs; |
| 2790 | }; |
| 2791 | |
| 2792 | /** |
| 2793 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
| 2794 | * containing div (which has presumably changed size since the dygraph was |
| 2795 | * instantiated. If the width/height are specified, the div will be resized. |
| 2796 | * |
| 2797 | * This is far more efficient than destroying and re-instantiating a |
| 2798 | * Dygraph, since it doesn't have to reparse the underlying data. |
| 2799 | * |
| 2800 | * @param {Number} [width] Width (in pixels) |
| 2801 | * @param {Number} [height] Height (in pixels) |
| 2802 | */ |
| 2803 | Dygraph.prototype.resize = function(width, height) { |
| 2804 | if (this.resize_lock) { |
| 2805 | return; |
| 2806 | } |
| 2807 | this.resize_lock = true; |
| 2808 | |
| 2809 | if ((width === null) != (height === null)) { |
| 2810 | this.warn("Dygraph.resize() should be called with zero parameters or " + |
| 2811 | "two non-NULL parameters. Pretending it was zero."); |
| 2812 | width = height = null; |
| 2813 | } |
| 2814 | |
| 2815 | var old_width = this.width_; |
| 2816 | var old_height = this.height_; |
| 2817 | |
| 2818 | if (width) { |
| 2819 | this.maindiv_.style.width = width + "px"; |
| 2820 | this.maindiv_.style.height = height + "px"; |
| 2821 | this.width_ = width; |
| 2822 | this.height_ = height; |
| 2823 | } else { |
| 2824 | this.width_ = this.maindiv_.offsetWidth; |
| 2825 | this.height_ = this.maindiv_.offsetHeight; |
| 2826 | } |
| 2827 | |
| 2828 | if (old_width != this.width_ || old_height != this.height_) { |
| 2829 | // TODO(danvk): there should be a clear() method. |
| 2830 | this.maindiv_.innerHTML = ""; |
| 2831 | this.roller_ = null; |
| 2832 | this.attrs_.labelsDiv = null; |
| 2833 | this.createInterface_(); |
| 2834 | this.predraw_(); |
| 2835 | } |
| 2836 | |
| 2837 | this.resize_lock = false; |
| 2838 | }; |
| 2839 | |
| 2840 | /** |
| 2841 | * Adjusts the number of points in the rolling average. Updates the graph to |
| 2842 | * reflect the new averaging period. |
| 2843 | * @param {Number} length Number of points over which to average the data. |
| 2844 | */ |
| 2845 | Dygraph.prototype.adjustRoll = function(length) { |
| 2846 | this.rollPeriod_ = length; |
| 2847 | this.predraw_(); |
| 2848 | }; |
| 2849 | |
| 2850 | /** |
| 2851 | * Returns a boolean array of visibility statuses. |
| 2852 | */ |
| 2853 | Dygraph.prototype.visibility = function() { |
| 2854 | // Do lazy-initialization, so that this happens after we know the number of |
| 2855 | // data series. |
| 2856 | if (!this.attr_("visibility")) { |
| 2857 | this.attrs_["visibility"] = []; |
| 2858 | } |
| 2859 | while (this.attr_("visibility").length < this.rawData_[0].length - 1) { |
| 2860 | this.attr_("visibility").push(true); |
| 2861 | } |
| 2862 | return this.attr_("visibility"); |
| 2863 | }; |
| 2864 | |
| 2865 | /** |
| 2866 | * Changes the visiblity of a series. |
| 2867 | */ |
| 2868 | Dygraph.prototype.setVisibility = function(num, value) { |
| 2869 | var x = this.visibility(); |
| 2870 | if (num < 0 || num >= x.length) { |
| 2871 | this.warn("invalid series number in setVisibility: " + num); |
| 2872 | } else { |
| 2873 | x[num] = value; |
| 2874 | this.predraw_(); |
| 2875 | } |
| 2876 | }; |
| 2877 | |
| 2878 | /** |
| 2879 | * How large of an area will the dygraph render itself in? |
| 2880 | * This is used for testing. |
| 2881 | * @return A {width: w, height: h} object. |
| 2882 | * @private |
| 2883 | */ |
| 2884 | Dygraph.prototype.size = function() { |
| 2885 | return { width: this.width_, height: this.height_ }; |
| 2886 | }; |
| 2887 | |
| 2888 | /** |
| 2889 | * Update the list of annotations and redraw the chart. |
| 2890 | */ |
| 2891 | Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { |
| 2892 | // Only add the annotation CSS rule once we know it will be used. |
| 2893 | Dygraph.addAnnotationRule(); |
| 2894 | this.annotations_ = ann; |
| 2895 | this.layout_.setAnnotations(this.annotations_); |
| 2896 | if (!suppressDraw) { |
| 2897 | this.predraw_(); |
| 2898 | } |
| 2899 | }; |
| 2900 | |
| 2901 | /** |
| 2902 | * Return the list of annotations. |
| 2903 | */ |
| 2904 | Dygraph.prototype.annotations = function() { |
| 2905 | return this.annotations_; |
| 2906 | }; |
| 2907 | |
| 2908 | /** |
| 2909 | * Get the index of a series (column) given its name. The first column is the |
| 2910 | * x-axis, so the data series start with index 1. |
| 2911 | */ |
| 2912 | Dygraph.prototype.indexFromSetName = function(name) { |
| 2913 | var labels = this.attr_("labels"); |
| 2914 | for (var i = 0; i < labels.length; i++) { |
| 2915 | if (labels[i] == name) return i; |
| 2916 | } |
| 2917 | return null; |
| 2918 | }; |
| 2919 | |
| 2920 | /** |
| 2921 | * @private |
| 2922 | * Adds a default style for the annotation CSS classes to the document. This is |
| 2923 | * only executed when annotations are actually used. It is designed to only be |
| 2924 | * called once -- all calls after the first will return immediately. |
| 2925 | */ |
| 2926 | Dygraph.addAnnotationRule = function() { |
| 2927 | if (Dygraph.addedAnnotationCSS) return; |
| 2928 | |
| 2929 | var rule = "border: 1px solid black; " + |
| 2930 | "background-color: white; " + |
| 2931 | "text-align: center;"; |
| 2932 | |
| 2933 | var styleSheetElement = document.createElement("style"); |
| 2934 | styleSheetElement.type = "text/css"; |
| 2935 | document.getElementsByTagName("head")[0].appendChild(styleSheetElement); |
| 2936 | |
| 2937 | // Find the first style sheet that we can access. |
| 2938 | // We may not add a rule to a style sheet from another domain for security |
| 2939 | // reasons. This sometimes comes up when using gviz, since the Google gviz JS |
| 2940 | // adds its own style sheets from google.com. |
| 2941 | for (var i = 0; i < document.styleSheets.length; i++) { |
| 2942 | if (document.styleSheets[i].disabled) continue; |
| 2943 | var mysheet = document.styleSheets[i]; |
| 2944 | try { |
| 2945 | if (mysheet.insertRule) { // Firefox |
| 2946 | var idx = mysheet.cssRules ? mysheet.cssRules.length : 0; |
| 2947 | mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", idx); |
| 2948 | } else if (mysheet.addRule) { // IE |
| 2949 | mysheet.addRule(".dygraphDefaultAnnotation", rule); |
| 2950 | } |
| 2951 | Dygraph.addedAnnotationCSS = true; |
| 2952 | return; |
| 2953 | } catch(err) { |
| 2954 | // Was likely a security exception. |
| 2955 | } |
| 2956 | } |
| 2957 | |
| 2958 | this.warn("Unable to add default annotation CSS rule; display may be off."); |
| 2959 | } |
| 2960 | |
| 2961 | // Older pages may still use this name. |
| 2962 | DateGraph = Dygraph; |