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88e95c46 DV |
1 | /** |
2 | * @license | |
3 | * Copyright 2006 Dan Vanderkam (danvdk@gmail.com) | |
4 | * MIT-licensed (http://opensource.org/licenses/MIT) | |
5 | */ | |
6a1aa64f DV |
6 | |
7 | /** | |
8 | * @fileoverview Creates an interactive, zoomable graph based on a CSV file or | |
285a6bda DV |
9 | * string. Dygraph can handle multiple series with or without error bars. The |
10 | * date/value ranges will be automatically set. Dygraph uses the | |
6a1aa64f DV |
11 | * <canvas> tag, so it only works in FF1.5+. |
12 | * @author danvdk@gmail.com (Dan Vanderkam) | |
13 | ||
14 | Usage: | |
15 | <div id="graphdiv" style="width:800px; height:500px;"></div> | |
16 | <script type="text/javascript"> | |
285a6bda DV |
17 | new Dygraph(document.getElementById("graphdiv"), |
18 | "datafile.csv", // CSV file with headers | |
19 | { }); // options | |
6a1aa64f DV |
20 | </script> |
21 | ||
22 | The CSV file is of the form | |
23 | ||
285a6bda | 24 | Date,SeriesA,SeriesB,SeriesC |
6a1aa64f DV |
25 | YYYYMMDD,A1,B1,C1 |
26 | YYYYMMDD,A2,B2,C2 | |
27 | ||
6a1aa64f DV |
28 | If the 'errorBars' option is set in the constructor, the input should be of |
29 | the form | |
285a6bda | 30 | Date,SeriesA,SeriesB,... |
6a1aa64f DV |
31 | YYYYMMDD,A1,sigmaA1,B1,sigmaB1,... |
32 | YYYYMMDD,A2,sigmaA2,B2,sigmaB2,... | |
33 | ||
34 | If the 'fractions' option is set, the input should be of the form: | |
35 | ||
285a6bda | 36 | Date,SeriesA,SeriesB,... |
6a1aa64f DV |
37 | YYYYMMDD,A1/B1,A2/B2,... |
38 | YYYYMMDD,A1/B1,A2/B2,... | |
39 | ||
40 | And error bars will be calculated automatically using a binomial distribution. | |
41 | ||
727439b4 | 42 | For further documentation and examples, see http://dygraphs.com/ |
6a1aa64f DV |
43 | |
44 | */ | |
45 | ||
758a629f DV |
46 | /*jshint globalstrict: true */ |
47 | /*global DygraphRangeSelector:false, DygraphLayout:false, DygraphCanvasRenderer:false, G_vmlCanvasManager:false */ | |
c0f54d4f DV |
48 | "use strict"; |
49 | ||
6a1aa64f | 50 | /** |
629a09ae DV |
51 | * Creates an interactive, zoomable chart. |
52 | * | |
53 | * @constructor | |
54 | * @param {div | String} div A div or the id of a div into which to construct | |
55 | * the chart. | |
56 | * @param {String | Function} file A file containing CSV data or a function | |
57 | * that returns this data. The most basic expected format for each line is | |
58 | * "YYYY/MM/DD,val1,val2,...". For more information, see | |
59 | * http://dygraphs.com/data.html. | |
6a1aa64f | 60 | * @param {Object} attrs Various other attributes, e.g. errorBars determines |
629a09ae DV |
61 | * whether the input data contains error ranges. For a complete list of |
62 | * options, see http://dygraphs.com/options.html. | |
6a1aa64f | 63 | */ |
86a3e64f DV |
64 | var Dygraph = function(div, data, opts, opt_fourth_param) { |
65 | if (opt_fourth_param !== undefined) { | |
66 | // Old versions of dygraphs took in the series labels as a constructor | |
67 | // parameter. This doesn't make sense anymore, but it's easy to continue | |
68 | // to support this usage. | |
69 | this.warn("Using deprecated four-argument dygraph constructor"); | |
70 | this.__old_init__(div, data, opts, opt_fourth_param); | |
71 | } else { | |
72 | this.__init__(div, data, opts); | |
285a6bda | 73 | } |
6a1aa64f DV |
74 | }; |
75 | ||
285a6bda DV |
76 | Dygraph.NAME = "Dygraph"; |
77 | Dygraph.VERSION = "1.2"; | |
78 | Dygraph.__repr__ = function() { | |
6a1aa64f DV |
79 | return "[" + this.NAME + " " + this.VERSION + "]"; |
80 | }; | |
629a09ae DV |
81 | |
82 | /** | |
83 | * Returns information about the Dygraph class. | |
84 | */ | |
285a6bda | 85 | Dygraph.toString = function() { |
6a1aa64f DV |
86 | return this.__repr__(); |
87 | }; | |
88 | ||
89 | // Various default values | |
285a6bda DV |
90 | Dygraph.DEFAULT_ROLL_PERIOD = 1; |
91 | Dygraph.DEFAULT_WIDTH = 480; | |
92 | Dygraph.DEFAULT_HEIGHT = 320; | |
6a1aa64f | 93 | |
b1a3b195 DV |
94 | Dygraph.ANIMATION_STEPS = 10; |
95 | Dygraph.ANIMATION_DURATION = 200; | |
96 | ||
48e614ac DV |
97 | // These are defined before DEFAULT_ATTRS so that it can refer to them. |
98 | /** | |
99 | * @private | |
100 | * Return a string version of a number. This respects the digitsAfterDecimal | |
101 | * and maxNumberWidth options. | |
102 | * @param {Number} x The number to be formatted | |
103 | * @param {Dygraph} opts An options view | |
104 | * @param {String} name The name of the point's data series | |
105 | * @param {Dygraph} g The dygraph object | |
106 | */ | |
107 | Dygraph.numberValueFormatter = function(x, opts, pt, g) { | |
108 | var sigFigs = opts('sigFigs'); | |
109 | ||
110 | if (sigFigs !== null) { | |
111 | // User has opted for a fixed number of significant figures. | |
112 | return Dygraph.floatFormat(x, sigFigs); | |
113 | } | |
114 | ||
115 | var digits = opts('digitsAfterDecimal'); | |
116 | var maxNumberWidth = opts('maxNumberWidth'); | |
117 | ||
118 | // switch to scientific notation if we underflow or overflow fixed display. | |
119 | if (x !== 0.0 && | |
120 | (Math.abs(x) >= Math.pow(10, maxNumberWidth) || | |
121 | Math.abs(x) < Math.pow(10, -digits))) { | |
122 | return x.toExponential(digits); | |
123 | } else { | |
124 | return '' + Dygraph.round_(x, digits); | |
125 | } | |
126 | }; | |
127 | ||
128 | /** | |
129 | * variant for use as an axisLabelFormatter. | |
130 | * @private | |
131 | */ | |
132 | Dygraph.numberAxisLabelFormatter = function(x, granularity, opts, g) { | |
133 | return Dygraph.numberValueFormatter(x, opts, g); | |
134 | }; | |
135 | ||
136 | /** | |
137 | * Convert a JS date (millis since epoch) to YYYY/MM/DD | |
138 | * @param {Number} date The JavaScript date (ms since epoch) | |
139 | * @return {String} A date of the form "YYYY/MM/DD" | |
140 | * @private | |
141 | */ | |
142 | Dygraph.dateString_ = function(date) { | |
143 | var zeropad = Dygraph.zeropad; | |
144 | var d = new Date(date); | |
145 | ||
146 | // Get the year: | |
147 | var year = "" + d.getFullYear(); | |
148 | // Get a 0 padded month string | |
149 | var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh | |
150 | // Get a 0 padded day string | |
151 | var day = zeropad(d.getDate()); | |
152 | ||
153 | var ret = ""; | |
154 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); | |
155 | if (frac) ret = " " + Dygraph.hmsString_(date); | |
156 | ||
157 | return year + "/" + month + "/" + day + ret; | |
158 | }; | |
159 | ||
160 | /** | |
161 | * Convert a JS date to a string appropriate to display on an axis that | |
162 | * is displaying values at the stated granularity. | |
163 | * @param {Date} date The date to format | |
164 | * @param {Number} granularity One of the Dygraph granularity constants | |
165 | * @return {String} The formatted date | |
166 | * @private | |
167 | */ | |
168 | Dygraph.dateAxisFormatter = function(date, granularity) { | |
169 | if (granularity >= Dygraph.DECADAL) { | |
170 | return date.strftime('%Y'); | |
171 | } else if (granularity >= Dygraph.MONTHLY) { | |
172 | return date.strftime('%b %y'); | |
173 | } else { | |
174 | var frac = date.getHours() * 3600 + date.getMinutes() * 60 + date.getSeconds() + date.getMilliseconds(); | |
758a629f | 175 | if (frac === 0 || granularity >= Dygraph.DAILY) { |
48e614ac DV |
176 | return new Date(date.getTime() + 3600*1000).strftime('%d%b'); |
177 | } else { | |
178 | return Dygraph.hmsString_(date.getTime()); | |
179 | } | |
180 | } | |
181 | }; | |
182 | ||
38e3d209 DV |
183 | /** |
184 | * Standard plotters. These may be used by clients. | |
185 | * Available plotters are: | |
186 | * - Dygraph.Plotters.linePlotter: draws central lines (most common) | |
187 | * - Dygraph.Plotters.errorPlotter: draws error bars | |
188 | * - Dygraph.Plotters.fillPlotter: draws fills under lines (used with fillGraph) | |
189 | * | |
190 | * By default, the plotter is [fillPlotter, errorPlotter, linePlotter]. | |
191 | * This causes all the lines to be drawn over all the fills/error bars. | |
192 | */ | |
193 | Dygraph.Plotters = DygraphCanvasRenderer._Plotters; | |
194 | ||
48e614ac | 195 | |
8e4a6af3 | 196 | // Default attribute values. |
285a6bda | 197 | Dygraph.DEFAULT_ATTRS = { |
a9fc39ab | 198 | highlightCircleSize: 3, |
857a6931 | 199 | highlightSeriesOpts: null, |
afdb20d8 | 200 | highlightSeriesBackgroundAlpha: 0.5, |
285a6bda | 201 | |
8e4a6af3 DV |
202 | labelsDivWidth: 250, |
203 | labelsDivStyles: { | |
204 | // TODO(danvk): move defaults from createStatusMessage_ here. | |
285a6bda DV |
205 | }, |
206 | labelsSeparateLines: false, | |
bcd3ebf0 | 207 | labelsShowZeroValues: true, |
285a6bda | 208 | labelsKMB: false, |
afefbcdb | 209 | labelsKMG2: false, |
d160cc3b | 210 | showLabelsOnHighlight: true, |
12e4c741 | 211 | |
2e1fcf1a DV |
212 | digitsAfterDecimal: 2, |
213 | maxNumberWidth: 6, | |
19589a3e | 214 | sigFigs: null, |
285a6bda DV |
215 | |
216 | strokeWidth: 1.0, | |
857a6931 KW |
217 | strokeBorderWidth: 0, |
218 | strokeBorderColor: "white", | |
8e4a6af3 | 219 | |
8846615a DV |
220 | axisTickSize: 3, |
221 | axisLabelFontSize: 14, | |
222 | xAxisLabelWidth: 50, | |
223 | yAxisLabelWidth: 50, | |
224 | rightGap: 5, | |
285a6bda DV |
225 | |
226 | showRoller: false, | |
285a6bda | 227 | xValueParser: Dygraph.dateParser, |
285a6bda | 228 | |
3d67f03b DV |
229 | delimiter: ',', |
230 | ||
285a6bda DV |
231 | sigma: 2.0, |
232 | errorBars: false, | |
233 | fractions: false, | |
234 | wilsonInterval: true, // only relevant if fractions is true | |
5954ef32 | 235 | customBars: false, |
43af96e7 NK |
236 | fillGraph: false, |
237 | fillAlpha: 0.15, | |
f032c51d | 238 | connectSeparatedPoints: false, |
43af96e7 NK |
239 | |
240 | stackedGraph: false, | |
afdc483f NN |
241 | hideOverlayOnMouseOut: true, |
242 | ||
2fccd3dc DV |
243 | // TODO(danvk): support 'onmouseover' and 'never', and remove synonyms. |
244 | legend: 'onmouseover', // the only relevant value at the moment is 'always'. | |
245 | ||
00c281d4 | 246 | stepPlot: false, |
062ef401 | 247 | avoidMinZero: false, |
f4b87da2 | 248 | drawAxesAtZero: false, |
062ef401 | 249 | |
ad1798c2 | 250 | // Sizes of the various chart labels. |
b4202b3d | 251 | titleHeight: 28, |
86cce9e8 DV |
252 | xLabelHeight: 18, |
253 | yLabelWidth: 18, | |
ad1798c2 | 254 | |
423f5ed3 DV |
255 | drawXAxis: true, |
256 | drawYAxis: true, | |
257 | axisLineColor: "black", | |
990d6a35 DV |
258 | axisLineWidth: 0.3, |
259 | gridLineWidth: 0.3, | |
260 | axisLabelColor: "black", | |
261 | axisLabelFont: "Arial", // TODO(danvk): is this implemented? | |
262 | axisLabelWidth: 50, | |
263 | drawYGrid: true, | |
264 | drawXGrid: true, | |
265 | gridLineColor: "rgb(128,128,128)", | |
423f5ed3 | 266 | |
48e614ac | 267 | interactionModel: null, // will be set to Dygraph.Interaction.defaultModel |
b1a3b195 | 268 | animatedZooms: false, // (for now) |
48e614ac | 269 | |
ccd9d7c2 PF |
270 | // Range selector options |
271 | showRangeSelector: false, | |
272 | rangeSelectorHeight: 40, | |
273 | rangeSelectorPlotStrokeColor: "#808FAB", | |
274 | rangeSelectorPlotFillColor: "#A7B1C4", | |
275 | ||
38e3d209 DV |
276 | // The ordering here ensures that central lines always appear above any |
277 | // fill bars/error bars. | |
278 | plotter: [ | |
279 | Dygraph.Plotters.fillPlotter, | |
280 | Dygraph.Plotters.errorPlotter, | |
281 | Dygraph.Plotters.linePlotter | |
282 | ], | |
283 | ||
48e614ac DV |
284 | // per-axis options |
285 | axes: { | |
286 | x: { | |
287 | pixelsPerLabel: 60, | |
288 | axisLabelFormatter: Dygraph.dateAxisFormatter, | |
289 | valueFormatter: Dygraph.dateString_, | |
290 | ticker: null // will be set in dygraph-tickers.js | |
291 | }, | |
292 | y: { | |
293 | pixelsPerLabel: 30, | |
294 | valueFormatter: Dygraph.numberValueFormatter, | |
295 | axisLabelFormatter: Dygraph.numberAxisLabelFormatter, | |
296 | ticker: null // will be set in dygraph-tickers.js | |
297 | }, | |
298 | y2: { | |
299 | pixelsPerLabel: 30, | |
300 | valueFormatter: Dygraph.numberValueFormatter, | |
301 | axisLabelFormatter: Dygraph.numberAxisLabelFormatter, | |
302 | ticker: null // will be set in dygraph-tickers.js | |
303 | } | |
304 | } | |
285a6bda DV |
305 | }; |
306 | ||
39b0e098 RK |
307 | // Directions for panning and zooming. Use bit operations when combined |
308 | // values are possible. | |
309 | Dygraph.HORIZONTAL = 1; | |
310 | Dygraph.VERTICAL = 2; | |
311 | ||
e2c21500 DV |
312 | // Installed plugins, in order of precedence (most-general to most-specific). |
313 | // Plugins are installed after they are defined, in plugins/install.js. | |
314 | Dygraph.PLUGINS = [ | |
315 | ]; | |
316 | ||
5c528fa2 DV |
317 | // Used for initializing annotation CSS rules only once. |
318 | Dygraph.addedAnnotationCSS = false; | |
319 | ||
285a6bda DV |
320 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { |
321 | // Labels is no longer a constructor parameter, since it's typically set | |
322 | // directly from the data source. It also conains a name for the x-axis, | |
323 | // which the previous constructor form did not. | |
758a629f | 324 | if (labels !== null) { |
285a6bda DV |
325 | var new_labels = ["Date"]; |
326 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); | |
fc80a396 | 327 | Dygraph.update(attrs, { 'labels': new_labels }); |
285a6bda DV |
328 | } |
329 | this.__init__(div, file, attrs); | |
8e4a6af3 DV |
330 | }; |
331 | ||
6a1aa64f | 332 | /** |
285a6bda | 333 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
7aedf6fe | 334 | * and context <canvas> inside of it. See the constructor for details. |
6a1aa64f | 335 | * on the parameters. |
12e4c741 | 336 | * @param {Element} div the Element to render the graph into. |
6a1aa64f | 337 | * @param {String | Function} file Source data |
6a1aa64f DV |
338 | * @param {Object} attrs Miscellaneous other options |
339 | * @private | |
340 | */ | |
285a6bda | 341 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
a2c8fff4 DV |
342 | // Hack for IE: if we're using excanvas and the document hasn't finished |
343 | // loading yet (and hence may not have initialized whatever it needs to | |
344 | // initialize), then keep calling this routine periodically until it has. | |
345 | if (/MSIE/.test(navigator.userAgent) && !window.opera && | |
346 | typeof(G_vmlCanvasManager) != 'undefined' && | |
347 | document.readyState != 'complete') { | |
348 | var self = this; | |
758a629f | 349 | setTimeout(function() { self.__init__(div, file, attrs); }, 100); |
ccd9d7c2 | 350 | return; |
a2c8fff4 DV |
351 | } |
352 | ||
285a6bda | 353 | // Support two-argument constructor |
758a629f | 354 | if (attrs === null || attrs === undefined) { attrs = {}; } |
285a6bda | 355 | |
48e614ac DV |
356 | attrs = Dygraph.mapLegacyOptions_(attrs); |
357 | ||
358 | if (!div) { | |
359 | Dygraph.error("Constructing dygraph with a non-existent div!"); | |
360 | return; | |
361 | } | |
362 | ||
920208fb PF |
363 | this.isUsingExcanvas_ = typeof(G_vmlCanvasManager) != 'undefined'; |
364 | ||
6a1aa64f | 365 | // Copy the important bits into the object |
32988383 | 366 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
6a1aa64f | 367 | this.maindiv_ = div; |
6a1aa64f | 368 | this.file_ = file; |
285a6bda | 369 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
6a1aa64f | 370 | this.previousVerticalX_ = -1; |
6a1aa64f | 371 | this.fractions_ = attrs.fractions || false; |
6a1aa64f | 372 | this.dateWindow_ = attrs.dateWindow || null; |
8b83c6cc | 373 | |
fe0b7c03 | 374 | this.is_initial_draw_ = true; |
5c528fa2 | 375 | this.annotations_ = []; |
7aedf6fe | 376 | |
45f2c689 | 377 | // Zoomed indicators - These indicate when the graph has been zoomed and on what axis. |
57baab03 NN |
378 | this.zoomed_x_ = false; |
379 | this.zoomed_y_ = false; | |
45f2c689 | 380 | |
f7d6278e DV |
381 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
382 | // div, then only one will be drawn. | |
383 | div.innerHTML = ""; | |
384 | ||
0cb9bd91 DV |
385 | // For historical reasons, the 'width' and 'height' options trump all CSS |
386 | // rules _except_ for an explicit 'width' or 'height' on the div. | |
387 | // As an added convenience, if the div has zero height (like <div></div> does | |
388 | // without any styles), then we use a default height/width. | |
758a629f | 389 | if (div.style.width === '' && attrs.width) { |
0cb9bd91 | 390 | div.style.width = attrs.width + "px"; |
285a6bda | 391 | } |
758a629f | 392 | if (div.style.height === '' && attrs.height) { |
0cb9bd91 | 393 | div.style.height = attrs.height + "px"; |
32988383 | 394 | } |
758a629f | 395 | if (div.style.height === '' && div.clientHeight === 0) { |
0cb9bd91 | 396 | div.style.height = Dygraph.DEFAULT_HEIGHT + "px"; |
758a629f | 397 | if (div.style.width === '') { |
0cb9bd91 DV |
398 | div.style.width = Dygraph.DEFAULT_WIDTH + "px"; |
399 | } | |
c21d2c2d | 400 | } |
fffad740 | 401 | // these will be zero if the dygraph's div is hidden. |
ccd9d7c2 PF |
402 | this.width_ = div.clientWidth; |
403 | this.height_ = div.clientHeight; | |
32988383 | 404 | |
344ba8c0 | 405 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
758a629f DV |
406 | if (attrs.stackedGraph) { |
407 | attrs.fillGraph = true; | |
43af96e7 NK |
408 | // TODO(nikhilk): Add any other stackedGraph checks here. |
409 | } | |
410 | ||
e71332d6 DV |
411 | // These two options have a bad interaction. See issue 359. |
412 | if (attrs.showRangeSelector && attrs.animatedZooms) { | |
413 | this.warn('You should not set animatedZooms=true when using the range selector.'); | |
414 | attrs.animatedZooms = false; | |
415 | } | |
416 | ||
285a6bda DV |
417 | // Dygraphs has many options, some of which interact with one another. |
418 | // To keep track of everything, we maintain two sets of options: | |
419 | // | |
c21d2c2d | 420 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
421 | // this.attrs_ defaults, options derived from user_attrs_, data. |
422 | // | |
423 | // Options are then accessed this.attr_('attr'), which first looks at | |
424 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
425 | // defaults without overriding behavior that the user specifically asks for. | |
426 | this.user_attrs_ = {}; | |
fc80a396 | 427 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 428 | |
48e614ac | 429 | // This sequence ensures that Dygraph.DEFAULT_ATTRS is never modified. |
285a6bda | 430 | this.attrs_ = {}; |
48e614ac | 431 | Dygraph.updateDeep(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 432 | |
16269f6e | 433 | this.boundaryIds_ = []; |
82c6fe4d | 434 | this.setIndexByName_ = {}; |
857a6931 | 435 | this.datasetIndex_ = []; |
6a1aa64f | 436 | |
6a4587ac | 437 | this.registeredEvents_ = []; |
de8f284f | 438 | this.eventListeners_ = {}; |
6a4587ac | 439 | |
c1780ad0 RK |
440 | this.attributes_ = new DygraphOptions(this); |
441 | ||
6a1aa64f DV |
442 | // Create the containing DIV and other interactive elements |
443 | this.createInterface_(); | |
444 | ||
e2c21500 DV |
445 | // Activate plugins. |
446 | this.plugins_ = []; | |
447 | for (var i = 0; i < Dygraph.PLUGINS.length; i++) { | |
42a9ebb8 DV |
448 | var Plugin = Dygraph.PLUGINS[i]; |
449 | var pluginInstance = new Plugin(); | |
e2c21500 DV |
450 | var pluginDict = { |
451 | plugin: pluginInstance, | |
452 | events: {}, | |
453 | options: {}, | |
454 | pluginOptions: {} | |
455 | }; | |
456 | ||
6a4457b4 KW |
457 | var handlers = pluginInstance.activate(this); |
458 | for (var eventName in handlers) { | |
28aa77ac | 459 | // TODO(danvk): validate eventName. |
6a4457b4 KW |
460 | pluginDict.events[eventName] = handlers[eventName]; |
461 | } | |
e2c21500 DV |
462 | |
463 | this.plugins_.push(pluginDict); | |
464 | } | |
465 | ||
466 | // At this point, plugins can no longer register event handlers. | |
467 | // Construct a map from event -> ordered list of [callback, plugin]. | |
e2c21500 DV |
468 | for (var i = 0; i < this.plugins_.length; i++) { |
469 | var plugin_dict = this.plugins_[i]; | |
470 | for (var eventName in plugin_dict.events) { | |
471 | if (!plugin_dict.events.hasOwnProperty(eventName)) continue; | |
472 | var callback = plugin_dict.events[eventName]; | |
473 | ||
474 | var pair = [plugin_dict.plugin, callback]; | |
475 | if (!(eventName in this.eventListeners_)) { | |
476 | this.eventListeners_[eventName] = [pair]; | |
477 | } else { | |
478 | this.eventListeners_[eventName].push(pair); | |
479 | } | |
480 | } | |
481 | } | |
482 | ||
738fc797 | 483 | this.start_(); |
6a1aa64f DV |
484 | }; |
485 | ||
dcb25130 | 486 | /** |
e2c21500 DV |
487 | * Triggers a cascade of events to the various plugins which are interested in them. |
488 | * Returns true if the "default behavior" should be performed, i.e. if none of | |
489 | * the event listeners called event.preventDefault(). | |
490 | * @private | |
491 | */ | |
492 | Dygraph.prototype.cascadeEvents_ = function(name, extra_props) { | |
42a9ebb8 | 493 | if (!(name in this.eventListeners_)) return true; |
e2c21500 DV |
494 | |
495 | // QUESTION: can we use objects & prototypes to speed this up? | |
496 | var e = { | |
497 | dygraph: this, | |
498 | cancelable: false, | |
499 | defaultPrevented: false, | |
500 | preventDefault: function() { | |
501 | if (!e.cancelable) throw "Cannot call preventDefault on non-cancelable event."; | |
502 | e.defaultPrevented = true; | |
503 | }, | |
504 | propagationStopped: false, | |
505 | stopPropagation: function() { | |
5bd29cf4 | 506 | e.propagationStopped = true; |
e2c21500 DV |
507 | } |
508 | }; | |
509 | Dygraph.update(e, extra_props); | |
510 | ||
511 | var callback_plugin_pairs = this.eventListeners_[name]; | |
da1c187b KW |
512 | if (callback_plugin_pairs) { |
513 | for (var i = callback_plugin_pairs.length - 1; i >= 0; i--) { | |
514 | var plugin = callback_plugin_pairs[i][0]; | |
515 | var callback = callback_plugin_pairs[i][1]; | |
516 | callback.call(plugin, e); | |
517 | if (e.propagationStopped) break; | |
518 | } | |
e2c21500 DV |
519 | } |
520 | return e.defaultPrevented; | |
521 | }; | |
522 | ||
523 | /** | |
dcb25130 NN |
524 | * Returns the zoomed status of the chart for one or both axes. |
525 | * | |
526 | * Axis is an optional parameter. Can be set to 'x' or 'y'. | |
527 | * | |
528 | * The zoomed status for an axis is set whenever a user zooms using the mouse | |
42a9ebb8 DV |
529 | * or when the dateWindow or valueRange are updated (unless the |
530 | * isZoomedIgnoreProgrammaticZoom option is also specified). | |
dcb25130 | 531 | */ |
57baab03 | 532 | Dygraph.prototype.isZoomed = function(axis) { |
42a9ebb8 DV |
533 | if (axis === null || axis === undefined) { |
534 | return this.zoomed_x_ || this.zoomed_y_; | |
535 | } | |
758a629f DV |
536 | if (axis === 'x') return this.zoomed_x_; |
537 | if (axis === 'y') return this.zoomed_y_; | |
94ea5744 | 538 | throw "axis parameter is [" + axis + "] must be null, 'x' or 'y'."; |
57baab03 NN |
539 | }; |
540 | ||
629a09ae DV |
541 | /** |
542 | * Returns information about the Dygraph object, including its containing ID. | |
543 | */ | |
22bd1dfb RK |
544 | Dygraph.prototype.toString = function() { |
545 | var maindiv = this.maindiv_; | |
758a629f | 546 | var id = (maindiv && maindiv.id) ? maindiv.id : maindiv; |
22bd1dfb | 547 | return "[Dygraph " + id + "]"; |
758a629f | 548 | }; |
22bd1dfb | 549 | |
629a09ae DV |
550 | /** |
551 | * @private | |
552 | * Returns the value of an option. This may be set by the user (either in the | |
553 | * constructor or by calling updateOptions) or by dygraphs, and may be set to a | |
554 | * per-series value. | |
555 | * @param { String } name The name of the option, e.g. 'rollPeriod'. | |
556 | * @param { String } [seriesName] The name of the series to which the option | |
557 | * will be applied. If no per-series value of this option is available, then | |
558 | * the global value is returned. This is optional. | |
559 | * @return { ... } The value of the option. | |
560 | */ | |
227b93cc | 561 | Dygraph.prototype.attr_ = function(name, seriesName) { |
028ddf8a DV |
562 | // <REMOVE_FOR_COMBINED> |
563 | if (typeof(Dygraph.OPTIONS_REFERENCE) === 'undefined') { | |
564 | this.error('Must include options reference JS for testing'); | |
565 | } else if (!Dygraph.OPTIONS_REFERENCE.hasOwnProperty(name)) { | |
566 | this.error('Dygraphs is using property ' + name + ', which has no entry ' + | |
567 | 'in the Dygraphs.OPTIONS_REFERENCE listing.'); | |
568 | // Only log this error once. | |
569 | Dygraph.OPTIONS_REFERENCE[name] = true; | |
570 | } | |
571 | // </REMOVE_FOR_COMBINED> | |
857a6931 | 572 | |
c1780ad0 RK |
573 | // Building an array which we peruse in backwards order to find the correct value. |
574 | // Options are checked in this order: | |
575 | // series, axis, user attrs, global attrs. | |
576 | // TODO(konigsberg): Can this be made faster by starting with the series and working outward, | |
577 | // rather than building an array? | |
578 | ||
857a6931 KW |
579 | var sources = []; |
580 | sources.push(this.attrs_); | |
475f7420 KW |
581 | if (this.user_attrs_) { |
582 | sources.push(this.user_attrs_); | |
583 | if (seriesName) { | |
584 | if (this.user_attrs_.hasOwnProperty(seriesName)) { | |
585 | sources.push(this.user_attrs_[seriesName]); | |
586 | } | |
c1780ad0 RK |
587 | |
588 | // TODO(konigsberg): This special case ought to be documented. | |
475f7420 KW |
589 | if (seriesName === this.highlightSet_ && |
590 | this.user_attrs_.hasOwnProperty('highlightSeriesOpts')) { | |
42a9ebb8 | 591 | sources.push(this.user_attrs_.highlightSeriesOpts); |
475f7420 | 592 | } |
857a6931 | 593 | } |
285a6bda | 594 | } |
857a6931 KW |
595 | |
596 | var ret = null; | |
597 | for (var i = sources.length - 1; i >= 0; --i) { | |
598 | var source = sources[i]; | |
599 | if (source.hasOwnProperty(name)) { | |
600 | ret = source[name]; | |
601 | break; | |
602 | } | |
285a6bda | 603 | } |
c1780ad0 RK |
604 | |
605 | var computedValue = seriesName ? this.attributes_.findForSeries(name, seriesName) : this.attributes_.find(name); | |
c1780ad0 RK |
606 | if (ret !== computedValue) { |
607 | console.log("Mismatch", name, seriesName, ret, computedValue); | |
c1780ad0 | 608 | } |
ed30673a RK |
609 | |
610 | var USE_NEW_VALUE = true; | |
611 | return USE_NEW_VALUE ? computedValue : ret; | |
285a6bda DV |
612 | }; |
613 | ||
6a1aa64f | 614 | /** |
e2c21500 DV |
615 | * Returns the current value for an option, as set in the constructor or via |
616 | * updateOptions. You may pass in an (optional) series name to get per-series | |
617 | * values for the option. | |
618 | * | |
619 | * All values returned by this method should be considered immutable. If you | |
620 | * modify them, there is no guarantee that the changes will be honored or that | |
621 | * dygraphs will remain in a consistent state. If you want to modify an option, | |
622 | * use updateOptions() instead. | |
623 | * | |
624 | * @param { String } name The name of the option (e.g. 'strokeWidth') | |
625 | * @param { String } [opt_seriesName] Series name to get per-series values. | |
626 | * @return { ... } The value of the option. | |
627 | */ | |
628 | Dygraph.prototype.getOption = function(name, opt_seriesName) { | |
629 | return this.attr_(name, opt_seriesName); | |
630 | }; | |
631 | ||
632 | /** | |
48e614ac DV |
633 | * @private |
634 | * @param String} axis The name of the axis (i.e. 'x', 'y' or 'y2') | |
635 | * @return { ... } A function mapping string -> option value | |
636 | */ | |
637 | Dygraph.prototype.optionsViewForAxis_ = function(axis) { | |
638 | var self = this; | |
639 | return function(opt) { | |
758a629f | 640 | var axis_opts = self.user_attrs_.axes; |
48e614ac DV |
641 | if (axis_opts && axis_opts[axis] && axis_opts[axis][opt]) { |
642 | return axis_opts[axis][opt]; | |
643 | } | |
644 | // user-specified attributes always trump defaults, even if they're less | |
645 | // specific. | |
646 | if (typeof(self.user_attrs_[opt]) != 'undefined') { | |
647 | return self.user_attrs_[opt]; | |
648 | } | |
649 | ||
758a629f | 650 | axis_opts = self.attrs_.axes; |
48e614ac DV |
651 | if (axis_opts && axis_opts[axis] && axis_opts[axis][opt]) { |
652 | return axis_opts[axis][opt]; | |
653 | } | |
654 | // check old-style axis options | |
655 | // TODO(danvk): add a deprecation warning if either of these match. | |
656 | if (axis == 'y' && self.axes_[0].hasOwnProperty(opt)) { | |
657 | return self.axes_[0][opt]; | |
658 | } else if (axis == 'y2' && self.axes_[1].hasOwnProperty(opt)) { | |
659 | return self.axes_[1][opt]; | |
660 | } | |
661 | return self.attr_(opt); | |
662 | }; | |
663 | }; | |
664 | ||
665 | /** | |
6a1aa64f | 666 | * Returns the current rolling period, as set by the user or an option. |
6faebb69 | 667 | * @return {Number} The number of points in the rolling window |
6a1aa64f | 668 | */ |
285a6bda | 669 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 670 | return this.rollPeriod_; |
76171648 DV |
671 | }; |
672 | ||
599fb4ad DV |
673 | /** |
674 | * Returns the currently-visible x-range. This can be affected by zooming, | |
675 | * panning or a call to updateOptions. | |
676 | * Returns a two-element array: [left, right]. | |
677 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
678 | */ | |
679 | Dygraph.prototype.xAxisRange = function() { | |
4cac8c7a RK |
680 | return this.dateWindow_ ? this.dateWindow_ : this.xAxisExtremes(); |
681 | }; | |
599fb4ad | 682 | |
4cac8c7a RK |
683 | /** |
684 | * Returns the lower- and upper-bound x-axis values of the | |
685 | * data set. | |
686 | */ | |
687 | Dygraph.prototype.xAxisExtremes = function() { | |
599fb4ad DV |
688 | var left = this.rawData_[0][0]; |
689 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
690 | return [left, right]; | |
691 | }; | |
692 | ||
3230c662 | 693 | /** |
d58ae307 DV |
694 | * Returns the currently-visible y-range for an axis. This can be affected by |
695 | * zooming, panning or a call to updateOptions. Axis indices are zero-based. If | |
696 | * called with no arguments, returns the range of the first axis. | |
3230c662 DV |
697 | * Returns a two-element array: [bottom, top]. |
698 | */ | |
d58ae307 | 699 | Dygraph.prototype.yAxisRange = function(idx) { |
d63e6799 | 700 | if (typeof(idx) == "undefined") idx = 0; |
d64b8fea RK |
701 | if (idx < 0 || idx >= this.axes_.length) { |
702 | return null; | |
703 | } | |
704 | var axis = this.axes_[idx]; | |
705 | return [ axis.computedValueRange[0], axis.computedValueRange[1] ]; | |
d58ae307 DV |
706 | }; |
707 | ||
708 | /** | |
709 | * Returns the currently-visible y-ranges for each axis. This can be affected by | |
710 | * zooming, panning, calls to updateOptions, etc. | |
711 | * Returns an array of [bottom, top] pairs, one for each y-axis. | |
712 | */ | |
713 | Dygraph.prototype.yAxisRanges = function() { | |
714 | var ret = []; | |
715 | for (var i = 0; i < this.axes_.length; i++) { | |
716 | ret.push(this.yAxisRange(i)); | |
717 | } | |
718 | return ret; | |
3230c662 DV |
719 | }; |
720 | ||
d58ae307 | 721 | // TODO(danvk): use these functions throughout dygraphs. |
3230c662 DV |
722 | /** |
723 | * Convert from data coordinates to canvas/div X/Y coordinates. | |
d58ae307 DV |
724 | * If specified, do this conversion for the coordinate system of a particular |
725 | * axis. Uses the first axis by default. | |
3230c662 | 726 | * Returns a two-element array: [X, Y] |
ff022deb | 727 | * |
0747928a | 728 | * Note: use toDomXCoord instead of toDomCoords(x, null) and use toDomYCoord |
ff022deb | 729 | * instead of toDomCoords(null, y, axis). |
3230c662 | 730 | */ |
d58ae307 | 731 | Dygraph.prototype.toDomCoords = function(x, y, axis) { |
ff022deb RK |
732 | return [ this.toDomXCoord(x), this.toDomYCoord(y, axis) ]; |
733 | }; | |
734 | ||
735 | /** | |
736 | * Convert from data x coordinates to canvas/div X coordinate. | |
737 | * If specified, do this conversion for the coordinate system of a particular | |
0037b2a4 RK |
738 | * axis. |
739 | * Returns a single value or null if x is null. | |
ff022deb RK |
740 | */ |
741 | Dygraph.prototype.toDomXCoord = function(x) { | |
758a629f | 742 | if (x === null) { |
ff022deb | 743 | return null; |
758a629f | 744 | } |
ff022deb | 745 | |
3230c662 | 746 | var area = this.plotter_.area; |
ff022deb RK |
747 | var xRange = this.xAxisRange(); |
748 | return area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; | |
758a629f | 749 | }; |
3230c662 | 750 | |
ff022deb RK |
751 | /** |
752 | * Convert from data x coordinates to canvas/div Y coordinate and optional | |
753 | * axis. Uses the first axis by default. | |
754 | * | |
755 | * returns a single value or null if y is null. | |
756 | */ | |
757 | Dygraph.prototype.toDomYCoord = function(y, axis) { | |
0747928a | 758 | var pct = this.toPercentYCoord(y, axis); |
3230c662 | 759 | |
758a629f | 760 | if (pct === null) { |
ff022deb RK |
761 | return null; |
762 | } | |
e4416fb9 | 763 | var area = this.plotter_.area; |
ff022deb | 764 | return area.y + pct * area.h; |
758a629f | 765 | }; |
3230c662 DV |
766 | |
767 | /** | |
768 | * Convert from canvas/div coords to data coordinates. | |
d58ae307 DV |
769 | * If specified, do this conversion for the coordinate system of a particular |
770 | * axis. Uses the first axis by default. | |
ff022deb RK |
771 | * Returns a two-element array: [X, Y]. |
772 | * | |
0747928a | 773 | * Note: use toDataXCoord instead of toDataCoords(x, null) and use toDataYCoord |
ff022deb | 774 | * instead of toDataCoords(null, y, axis). |
3230c662 | 775 | */ |
d58ae307 | 776 | Dygraph.prototype.toDataCoords = function(x, y, axis) { |
ff022deb RK |
777 | return [ this.toDataXCoord(x), this.toDataYCoord(y, axis) ]; |
778 | }; | |
779 | ||
780 | /** | |
781 | * Convert from canvas/div x coordinate to data coordinate. | |
782 | * | |
783 | * If x is null, this returns null. | |
784 | */ | |
785 | Dygraph.prototype.toDataXCoord = function(x) { | |
758a629f | 786 | if (x === null) { |
ff022deb | 787 | return null; |
3230c662 DV |
788 | } |
789 | ||
ff022deb RK |
790 | var area = this.plotter_.area; |
791 | var xRange = this.xAxisRange(); | |
792 | return xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); | |
793 | }; | |
794 | ||
795 | /** | |
796 | * Convert from canvas/div y coord to value. | |
797 | * | |
798 | * If y is null, this returns null. | |
799 | * if axis is null, this uses the first axis. | |
800 | */ | |
801 | Dygraph.prototype.toDataYCoord = function(y, axis) { | |
758a629f | 802 | if (y === null) { |
ff022deb | 803 | return null; |
3230c662 DV |
804 | } |
805 | ||
ff022deb RK |
806 | var area = this.plotter_.area; |
807 | var yRange = this.yAxisRange(axis); | |
808 | ||
b70247dc RK |
809 | if (typeof(axis) == "undefined") axis = 0; |
810 | if (!this.axes_[axis].logscale) { | |
d9816e62 | 811 | return yRange[0] + (area.y + area.h - y) / area.h * (yRange[1] - yRange[0]); |
ff022deb RK |
812 | } else { |
813 | // Computing the inverse of toDomCoord. | |
758a629f | 814 | var pct = (y - area.y) / area.h; |
ff022deb RK |
815 | |
816 | // Computing the inverse of toPercentYCoord. The function was arrived at with | |
817 | // the following steps: | |
818 | // | |
819 | // Original calcuation: | |
d59b6f34 | 820 | // pct = (logr1 - Dygraph.log10(y)) / (logr1 - Dygraph.log10(yRange[0])); |
ff022deb RK |
821 | // |
822 | // Move denominator to both sides: | |
d59b6f34 | 823 | // pct * (logr1 - Dygraph.log10(yRange[0])) = logr1 - Dygraph.log10(y); |
ff022deb RK |
824 | // |
825 | // subtract logr1, and take the negative value. | |
d59b6f34 | 826 | // logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))) = Dygraph.log10(y); |
ff022deb RK |
827 | // |
828 | // Swap both sides of the equation, and we can compute the log of the | |
829 | // return value. Which means we just need to use that as the exponent in | |
830 | // e^exponent. | |
d59b6f34 | 831 | // Dygraph.log10(y) = logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))); |
ff022deb | 832 | |
d59b6f34 RK |
833 | var logr1 = Dygraph.log10(yRange[1]); |
834 | var exponent = logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))); | |
835 | var value = Math.pow(Dygraph.LOG_SCALE, exponent); | |
ff022deb RK |
836 | return value; |
837 | } | |
3230c662 DV |
838 | }; |
839 | ||
e99fde05 | 840 | /** |
ff022deb | 841 | * Converts a y for an axis to a percentage from the top to the |
4cac8c7a | 842 | * bottom of the drawing area. |
ff022deb RK |
843 | * |
844 | * If the coordinate represents a value visible on the canvas, then | |
845 | * the value will be between 0 and 1, where 0 is the top of the canvas. | |
846 | * However, this method will return values outside the range, as | |
847 | * values can fall outside the canvas. | |
848 | * | |
849 | * If y is null, this returns null. | |
850 | * if axis is null, this uses the first axis. | |
629a09ae DV |
851 | * |
852 | * @param { Number } y The data y-coordinate. | |
853 | * @param { Number } [axis] The axis number on which the data coordinate lives. | |
854 | * @return { Number } A fraction in [0, 1] where 0 = the top edge. | |
ff022deb RK |
855 | */ |
856 | Dygraph.prototype.toPercentYCoord = function(y, axis) { | |
758a629f | 857 | if (y === null) { |
ff022deb RK |
858 | return null; |
859 | } | |
7d0e7a0d | 860 | if (typeof(axis) == "undefined") axis = 0; |
ff022deb | 861 | |
ff022deb RK |
862 | var yRange = this.yAxisRange(axis); |
863 | ||
864 | var pct; | |
7d0e7a0d | 865 | if (!this.axes_[axis].logscale) { |
4cac8c7a RK |
866 | // yRange[1] - y is unit distance from the bottom. |
867 | // yRange[1] - yRange[0] is the scale of the range. | |
ff022deb RK |
868 | // (yRange[1] - y) / (yRange[1] - yRange[0]) is the % from the bottom. |
869 | pct = (yRange[1] - y) / (yRange[1] - yRange[0]); | |
870 | } else { | |
d59b6f34 RK |
871 | var logr1 = Dygraph.log10(yRange[1]); |
872 | pct = (logr1 - Dygraph.log10(y)) / (logr1 - Dygraph.log10(yRange[0])); | |
ff022deb RK |
873 | } |
874 | return pct; | |
758a629f | 875 | }; |
ff022deb RK |
876 | |
877 | /** | |
4cac8c7a RK |
878 | * Converts an x value to a percentage from the left to the right of |
879 | * the drawing area. | |
880 | * | |
881 | * If the coordinate represents a value visible on the canvas, then | |
882 | * the value will be between 0 and 1, where 0 is the left of the canvas. | |
883 | * However, this method will return values outside the range, as | |
884 | * values can fall outside the canvas. | |
885 | * | |
886 | * If x is null, this returns null. | |
629a09ae DV |
887 | * @param { Number } x The data x-coordinate. |
888 | * @return { Number } A fraction in [0, 1] where 0 = the left edge. | |
4cac8c7a RK |
889 | */ |
890 | Dygraph.prototype.toPercentXCoord = function(x) { | |
758a629f | 891 | if (x === null) { |
4cac8c7a RK |
892 | return null; |
893 | } | |
894 | ||
4cac8c7a | 895 | var xRange = this.xAxisRange(); |
965a030e | 896 | return (x - xRange[0]) / (xRange[1] - xRange[0]); |
629a09ae | 897 | }; |
4cac8c7a RK |
898 | |
899 | /** | |
e99fde05 | 900 | * Returns the number of columns (including the independent variable). |
629a09ae | 901 | * @return { Integer } The number of columns. |
e99fde05 DV |
902 | */ |
903 | Dygraph.prototype.numColumns = function() { | |
395e98a3 | 904 | return this.rawData_[0] ? this.rawData_[0].length : this.attr_("labels").length; |
e99fde05 DV |
905 | }; |
906 | ||
907 | /** | |
908 | * Returns the number of rows (excluding any header/label row). | |
629a09ae | 909 | * @return { Integer } The number of rows, less any header. |
e99fde05 DV |
910 | */ |
911 | Dygraph.prototype.numRows = function() { | |
912 | return this.rawData_.length; | |
913 | }; | |
914 | ||
915 | /** | |
395e98a3 DV |
916 | * Returns the full range of the x-axis, as determined by the most extreme |
917 | * values in the data set. Not affected by zooming, visibility, etc. | |
769e8bc7 | 918 | * TODO(danvk): merge w/ xAxisExtremes |
395e98a3 DV |
919 | * @return { Array<Number> } A [low, high] pair |
920 | * @private | |
921 | */ | |
922 | Dygraph.prototype.fullXRange_ = function() { | |
923 | if (this.numRows() > 0) { | |
924 | return [this.rawData_[0][0], this.rawData_[this.numRows() - 1][0]]; | |
925 | } else { | |
926 | return [0, 1]; | |
927 | } | |
758a629f | 928 | }; |
395e98a3 DV |
929 | |
930 | /** | |
e99fde05 DV |
931 | * Returns the value in the given row and column. If the row and column exceed |
932 | * the bounds on the data, returns null. Also returns null if the value is | |
933 | * missing. | |
629a09ae DV |
934 | * @param { Number} row The row number of the data (0-based). Row 0 is the |
935 | * first row of data, not a header row. | |
936 | * @param { Number} col The column number of the data (0-based) | |
937 | * @return { Number } The value in the specified cell or null if the row/col | |
938 | * were out of range. | |
e99fde05 DV |
939 | */ |
940 | Dygraph.prototype.getValue = function(row, col) { | |
941 | if (row < 0 || row > this.rawData_.length) return null; | |
942 | if (col < 0 || col > this.rawData_[row].length) return null; | |
943 | ||
944 | return this.rawData_[row][col]; | |
945 | }; | |
946 | ||
629a09ae | 947 | /** |
285a6bda | 948 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 949 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 950 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
951 | * @private |
952 | */ | |
285a6bda | 953 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
954 | // Create the all-enclosing graph div |
955 | var enclosing = this.maindiv_; | |
956 | ||
b0c3b730 DV |
957 | this.graphDiv = document.createElement("div"); |
958 | this.graphDiv.style.width = this.width_ + "px"; | |
959 | this.graphDiv.style.height = this.height_ + "px"; | |
960 | enclosing.appendChild(this.graphDiv); | |
961 | ||
962 | // Create the canvas for interactive parts of the chart. | |
f8cfec73 | 963 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 DV |
964 | this.canvas_.style.position = "absolute"; |
965 | this.canvas_.width = this.width_; | |
966 | this.canvas_.height = this.height_; | |
f8cfec73 DV |
967 | this.canvas_.style.width = this.width_ + "px"; // for IE |
968 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
b0c3b730 | 969 | |
2cf95fff RK |
970 | this.canvas_ctx_ = Dygraph.getContext(this.canvas_); |
971 | ||
b0c3b730 | 972 | // ... and for static parts of the chart. |
6a1aa64f | 973 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
2cf95fff | 974 | this.hidden_ctx_ = Dygraph.getContext(this.hidden_); |
76171648 | 975 | |
ccd9d7c2 PF |
976 | if (this.attr_('showRangeSelector')) { |
977 | // The range selector must be created here so that its canvases and contexts get created here. | |
978 | // For some reason, if the canvases and contexts don't get created here, things don't work in IE. | |
ccd9d7c2 PF |
979 | this.rangeSelector_ = new DygraphRangeSelector(this); |
980 | } | |
981 | ||
eb7bf005 EC |
982 | // The interactive parts of the graph are drawn on top of the chart. |
983 | this.graphDiv.appendChild(this.hidden_); | |
984 | this.graphDiv.appendChild(this.canvas_); | |
920208fb PF |
985 | this.mouseEventElement_ = this.createMouseEventElement_(); |
986 | ||
987 | // Create the grapher | |
988 | this.layout_ = new DygraphLayout(this); | |
989 | ||
990 | if (this.rangeSelector_) { | |
991 | // This needs to happen after the graph canvases are added to the div and the layout object is created. | |
992 | this.rangeSelector_.addToGraph(this.graphDiv, this.layout_); | |
993 | } | |
eb7bf005 | 994 | |
76171648 | 995 | var dygraph = this; |
de8f284f | 996 | |
d7eddd78 | 997 | this.mouseMoveHandler = function(e) { |
421f1773 | 998 | dygraph.mouseMove_(e); |
d7eddd78 | 999 | }; |
6a4587ac | 1000 | this.addEvent(this.mouseEventElement_, 'mousemove', this.mouseMoveHandler); |
de8f284f | 1001 | |
d7eddd78 | 1002 | this.mouseOutHandler = function(e) { |
421f1773 | 1003 | dygraph.mouseOut_(e); |
d7eddd78 | 1004 | }; |
6a4587ac | 1005 | this.addEvent(this.mouseEventElement_, 'mouseout', this.mouseOutHandler); |
697e70b2 | 1006 | |
697e70b2 | 1007 | this.createDragInterface_(); |
4b4d1a63 | 1008 | |
1c6b239c | 1009 | this.resizeHandler = function(e) { |
1010 | dygraph.resize(); | |
d7eddd78 | 1011 | }; |
1c6b239c | 1012 | |
4b4d1a63 DV |
1013 | // Update when the window is resized. |
1014 | // TODO(danvk): drop frames depending on complexity of the chart. | |
6a4587ac | 1015 | this.addEvent(window, 'resize', this.resizeHandler); |
4cfcc38c DV |
1016 | }; |
1017 | ||
1018 | /** | |
1019 | * Detach DOM elements in the dygraph and null out all data references. | |
1020 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
1021 | * usage. See, e.g., the tests/perf.html example. | |
1022 | */ | |
1023 | Dygraph.prototype.destroy = function() { | |
1024 | var removeRecursive = function(node) { | |
1025 | while (node.hasChildNodes()) { | |
1026 | removeRecursive(node.firstChild); | |
1027 | node.removeChild(node.firstChild); | |
1028 | } | |
1029 | }; | |
de8f284f | 1030 | |
6a4587ac RK |
1031 | for (var idx = 0; idx < this.registeredEvents_.length; idx++) { |
1032 | var reg = this.registeredEvents_[idx]; | |
1cc3540b | 1033 | Dygraph.removeEvent(reg.elem, reg.type, reg.fn); |
6a4587ac RK |
1034 | } |
1035 | this.registeredEvents_ = []; | |
1036 | ||
1037 | // remove mouse event handlers (This may not be necessary anymore) | |
1cc3540b RK |
1038 | Dygraph.removeEvent(this.mouseEventElement_, 'mouseout', this.mouseOutHandler); |
1039 | Dygraph.removeEvent(this.mouseEventElement_, 'mousemove', this.mouseMoveHandler); | |
1040 | Dygraph.removeEvent(this.mouseEventElement_, 'mousemove', this.mouseUpHandler_); | |
4cfcc38c DV |
1041 | removeRecursive(this.maindiv_); |
1042 | ||
1043 | var nullOut = function(obj) { | |
1044 | for (var n in obj) { | |
1045 | if (typeof(obj[n]) === 'object') { | |
1046 | obj[n] = null; | |
1047 | } | |
1048 | } | |
1049 | }; | |
1c6b239c | 1050 | // remove event handlers |
1cc3540b | 1051 | Dygraph.removeEvent(window,'resize',this.resizeHandler); |
1c6b239c | 1052 | this.resizeHandler = null; |
4cfcc38c DV |
1053 | // These may not all be necessary, but it can't hurt... |
1054 | nullOut(this.layout_); | |
1055 | nullOut(this.plotter_); | |
1056 | nullOut(this); | |
1057 | }; | |
6a1aa64f DV |
1058 | |
1059 | /** | |
629a09ae DV |
1060 | * Creates the canvas on which the chart will be drawn. Only the Renderer ever |
1061 | * draws on this particular canvas. All Dygraph work (i.e. drawing hover dots | |
1062 | * or the zoom rectangles) is done on this.canvas_. | |
8846615a | 1063 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
1064 | * @return {Object} The newly-created canvas |
1065 | * @private | |
1066 | */ | |
285a6bda | 1067 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 | 1068 | var h = Dygraph.createCanvas(); |
6a1aa64f | 1069 | h.style.position = "absolute"; |
9ac5e4ae DV |
1070 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
1071 | // some extra area to make it easier to zoom in on the far left and far | |
1072 | // right. h needs to be precisely the plot area, so that clipping occurs. | |
6a1aa64f DV |
1073 | h.style.top = canvas.style.top; |
1074 | h.style.left = canvas.style.left; | |
1075 | h.width = this.width_; | |
1076 | h.height = this.height_; | |
f8cfec73 DV |
1077 | h.style.width = this.width_ + "px"; // for IE |
1078 | h.style.height = this.height_ + "px"; // for IE | |
6a1aa64f DV |
1079 | return h; |
1080 | }; | |
1081 | ||
629a09ae | 1082 | /** |
920208fb PF |
1083 | * Creates an overlay element used to handle mouse events. |
1084 | * @return {Object} The mouse event element. | |
1085 | * @private | |
1086 | */ | |
1087 | Dygraph.prototype.createMouseEventElement_ = function() { | |
1088 | if (this.isUsingExcanvas_) { | |
1089 | var elem = document.createElement("div"); | |
1090 | elem.style.position = 'absolute'; | |
1091 | elem.style.backgroundColor = 'white'; | |
1092 | elem.style.filter = 'alpha(opacity=0)'; | |
1093 | elem.style.width = this.width_ + "px"; | |
1094 | elem.style.height = this.height_ + "px"; | |
1095 | this.graphDiv.appendChild(elem); | |
1096 | return elem; | |
1097 | } else { | |
1098 | return this.canvas_; | |
1099 | } | |
1100 | }; | |
1101 | ||
1102 | /** | |
6a1aa64f DV |
1103 | * Generate a set of distinct colors for the data series. This is done with a |
1104 | * color wheel. Saturation/Value are customizable, and the hue is | |
1105 | * equally-spaced around the color wheel. If a custom set of colors is | |
1106 | * specified, that is used instead. | |
6a1aa64f DV |
1107 | * @private |
1108 | */ | |
285a6bda | 1109 | Dygraph.prototype.setColors_ = function() { |
ee53deb9 DV |
1110 | var labels = this.getLabels(); |
1111 | var num = labels.length - 1; | |
6a1aa64f | 1112 | this.colors_ = []; |
ee53deb9 | 1113 | this.colorsMap_ = {}; |
285a6bda | 1114 | var colors = this.attr_('colors'); |
758a629f | 1115 | var i; |
285a6bda DV |
1116 | if (!colors) { |
1117 | var sat = this.attr_('colorSaturation') || 1.0; | |
1118 | var val = this.attr_('colorValue') || 0.5; | |
2aa21213 | 1119 | var half = Math.ceil(num / 2); |
758a629f | 1120 | for (i = 1; i <= num; i++) { |
ec1959eb | 1121 | if (!this.visibility()[i-1]) continue; |
43af96e7 | 1122 | // alternate colors for high contrast. |
2aa21213 | 1123 | var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2); |
43af96e7 | 1124 | var hue = (1.0 * idx/ (1 + num)); |
ee53deb9 DV |
1125 | var colorStr = Dygraph.hsvToRGB(hue, sat, val); |
1126 | this.colors_.push(colorStr); | |
1127 | this.colorsMap_[labels[i]] = colorStr; | |
6a1aa64f DV |
1128 | } |
1129 | } else { | |
758a629f | 1130 | for (i = 0; i < num; i++) { |
ec1959eb | 1131 | if (!this.visibility()[i]) continue; |
285a6bda | 1132 | var colorStr = colors[i % colors.length]; |
f474c2a3 | 1133 | this.colors_.push(colorStr); |
ee53deb9 | 1134 | this.colorsMap_[labels[1 + i]] = colorStr; |
6a1aa64f DV |
1135 | } |
1136 | } | |
629a09ae | 1137 | }; |
6a1aa64f | 1138 | |
43af96e7 NK |
1139 | /** |
1140 | * Return the list of colors. This is either the list of colors passed in the | |
629a09ae | 1141 | * attributes or the autogenerated list of rgb(r,g,b) strings. |
e2c21500 | 1142 | * This does not return colors for invisible series. |
43af96e7 NK |
1143 | * @return {Array<string>} The list of colors. |
1144 | */ | |
1145 | Dygraph.prototype.getColors = function() { | |
1146 | return this.colors_; | |
1147 | }; | |
1148 | ||
6a1aa64f | 1149 | /** |
e2c21500 DV |
1150 | * Returns a few attributes of a series, i.e. its color, its visibility, which |
1151 | * axis it's assigned to, and its column in the original data. | |
1152 | * Returns null if the series does not exist. | |
1153 | * Otherwise, returns an object with column, visibility, color and axis properties. | |
1154 | * The "axis" property will be set to 1 for y1 and 2 for y2. | |
1155 | * The "column" property can be fed back into getValue(row, column) to get | |
1156 | * values for this series. | |
6a1aa64f | 1157 | */ |
e2c21500 DV |
1158 | Dygraph.prototype.getPropertiesForSeries = function(series_name) { |
1159 | var idx = -1; | |
1160 | var labels = this.getLabels(); | |
1161 | for (var i = 1; i < labels.length; i++) { | |
1162 | if (labels[i] == series_name) { | |
1163 | idx = i; | |
1164 | break; | |
b0c3b730 | 1165 | } |
6a1aa64f | 1166 | } |
e2c21500 | 1167 | if (idx == -1) return null; |
0abfbd7e | 1168 | |
e2c21500 DV |
1169 | return { |
1170 | name: series_name, | |
1171 | column: idx, | |
1172 | visible: this.visibility()[idx - 1], | |
189f8030 | 1173 | color: this.colorsMap_[series_name], |
e2c21500 DV |
1174 | axis: 1 + this.seriesToAxisMap_[series_name] |
1175 | }; | |
0abfbd7e DV |
1176 | }; |
1177 | ||
1178 | /** | |
6a1aa64f | 1179 | * Create the text box to adjust the averaging period |
6a1aa64f DV |
1180 | * @private |
1181 | */ | |
285a6bda | 1182 | Dygraph.prototype.createRollInterface_ = function() { |
8c69de65 DV |
1183 | // Create a roller if one doesn't exist already. |
1184 | if (!this.roller_) { | |
1185 | this.roller_ = document.createElement("input"); | |
1186 | this.roller_.type = "text"; | |
1187 | this.roller_.style.display = "none"; | |
1188 | this.graphDiv.appendChild(this.roller_); | |
1189 | } | |
1190 | ||
1191 | var display = this.attr_('showRoller') ? 'block' : 'none'; | |
26ca7938 | 1192 | |
0c38f187 | 1193 | var area = this.plotter_.area; |
b0c3b730 DV |
1194 | var textAttr = { "position": "absolute", |
1195 | "zIndex": 10, | |
0c38f187 DV |
1196 | "top": (area.y + area.h - 25) + "px", |
1197 | "left": (area.x + 1) + "px", | |
b0c3b730 | 1198 | "display": display |
6a1aa64f | 1199 | }; |
8c69de65 DV |
1200 | this.roller_.size = "2"; |
1201 | this.roller_.value = this.rollPeriod_; | |
b0c3b730 | 1202 | for (var name in textAttr) { |
85b99f0b | 1203 | if (textAttr.hasOwnProperty(name)) { |
8c69de65 | 1204 | this.roller_.style[name] = textAttr[name]; |
85b99f0b | 1205 | } |
b0c3b730 DV |
1206 | } |
1207 | ||
76171648 | 1208 | var dygraph = this; |
8c69de65 | 1209 | this.roller_.onchange = function() { dygraph.adjustRoll(dygraph.roller_.value); }; |
76171648 DV |
1210 | }; |
1211 | ||
629a09ae DV |
1212 | /** |
1213 | * @private | |
629a09ae DV |
1214 | * Converts page the x-coordinate of the event to pixel x-coordinates on the |
1215 | * canvas (i.e. DOM Coords). | |
1216 | */ | |
062ef401 | 1217 | Dygraph.prototype.dragGetX_ = function(e, context) { |
758a629f | 1218 | return Dygraph.pageX(e) - context.px; |
062ef401 | 1219 | }; |
bce01b0f | 1220 | |
629a09ae DV |
1221 | /** |
1222 | * @private | |
1223 | * Converts page the y-coordinate of the event to pixel y-coordinates on the | |
1224 | * canvas (i.e. DOM Coords). | |
1225 | */ | |
062ef401 | 1226 | Dygraph.prototype.dragGetY_ = function(e, context) { |
758a629f | 1227 | return Dygraph.pageY(e) - context.py; |
062ef401 | 1228 | }; |
ee672584 | 1229 | |
629a09ae | 1230 | /** |
062ef401 JB |
1231 | * Set up all the mouse handlers needed to capture dragging behavior for zoom |
1232 | * events. | |
1233 | * @private | |
1234 | */ | |
1235 | Dygraph.prototype.createDragInterface_ = function() { | |
1236 | var context = { | |
1237 | // Tracks whether the mouse is down right now | |
1238 | isZooming: false, | |
1239 | isPanning: false, // is this drag part of a pan? | |
1240 | is2DPan: false, // if so, is that pan 1- or 2-dimensional? | |
8442269f RK |
1241 | dragStartX: null, // pixel coordinates |
1242 | dragStartY: null, // pixel coordinates | |
1243 | dragEndX: null, // pixel coordinates | |
1244 | dragEndY: null, // pixel coordinates | |
062ef401 | 1245 | dragDirection: null, |
8442269f RK |
1246 | prevEndX: null, // pixel coordinates |
1247 | prevEndY: null, // pixel coordinates | |
062ef401 | 1248 | prevDragDirection: null, |
421f1773 | 1249 | cancelNextDblclick: false, // see comment in dygraph-interaction-model.js |
062ef401 | 1250 | |
ec291cbe RK |
1251 | // The value on the left side of the graph when a pan operation starts. |
1252 | initialLeftmostDate: null, | |
1253 | ||
1254 | // The number of units each pixel spans. (This won't be valid for log | |
1255 | // scales) | |
1256 | xUnitsPerPixel: null, | |
062ef401 JB |
1257 | |
1258 | // TODO(danvk): update this comment | |
1259 | // The range in second/value units that the viewport encompasses during a | |
1260 | // panning operation. | |
1261 | dateRange: null, | |
1262 | ||
8442269f RK |
1263 | // Top-left corner of the canvas, in DOM coords |
1264 | // TODO(konigsberg): Rename topLeftCanvasX, topLeftCanvasY. | |
062ef401 JB |
1265 | px: 0, |
1266 | py: 0, | |
1267 | ||
965a030e | 1268 | // Values for use with panEdgeFraction, which limit how far outside the |
4cac8c7a RK |
1269 | // graph's data boundaries it can be panned. |
1270 | boundedDates: null, // [minDate, maxDate] | |
1271 | boundedValues: null, // [[minValue, maxValue] ...] | |
1272 | ||
2bad4d92 DV |
1273 | // We cover iframes during mouse interactions. See comments in |
1274 | // dygraph-utils.js for more info on why this is a good idea. | |
1275 | tarp: new Dygraph.IFrameTarp(), | |
1276 | ||
6a4587ac RK |
1277 | // contextB is the same thing as this context object but renamed. |
1278 | initializeMouseDown: function(event, g, contextB) { | |
062ef401 JB |
1279 | // prevents mouse drags from selecting page text. |
1280 | if (event.preventDefault) { | |
1281 | event.preventDefault(); // Firefox, Chrome, etc. | |
6a1aa64f | 1282 | } else { |
062ef401 JB |
1283 | event.returnValue = false; // IE |
1284 | event.cancelBubble = true; | |
6a1aa64f DV |
1285 | } |
1286 | ||
6a4587ac RK |
1287 | contextB.px = Dygraph.findPosX(g.canvas_); |
1288 | contextB.py = Dygraph.findPosY(g.canvas_); | |
1289 | contextB.dragStartX = g.dragGetX_(event, contextB); | |
1290 | contextB.dragStartY = g.dragGetY_(event, contextB); | |
1291 | contextB.cancelNextDblclick = false; | |
2bad4d92 | 1292 | contextB.tarp.cover(); |
6a1aa64f | 1293 | } |
062ef401 | 1294 | }; |
2b188b3d | 1295 | |
062ef401 | 1296 | var interactionModel = this.attr_("interactionModel"); |
8b83c6cc | 1297 | |
062ef401 JB |
1298 | // Self is the graph. |
1299 | var self = this; | |
6faebb69 | 1300 | |
062ef401 JB |
1301 | // Function that binds the graph and context to the handler. |
1302 | var bindHandler = function(handler) { | |
1303 | return function(event) { | |
1304 | handler(event, self, context); | |
1305 | }; | |
1306 | }; | |
1307 | ||
1308 | for (var eventName in interactionModel) { | |
1309 | if (!interactionModel.hasOwnProperty(eventName)) continue; | |
6a4587ac | 1310 | this.addEvent(this.mouseEventElement_, eventName, |
062ef401 JB |
1311 | bindHandler(interactionModel[eventName])); |
1312 | } | |
1313 | ||
1314 | // If the user releases the mouse button during a drag, but not over the | |
1315 | // canvas, then it doesn't count as a zooming action. | |
cb1261cb | 1316 | this.mouseUpHandler_ = function(event) { |
062ef401 JB |
1317 | if (context.isZooming || context.isPanning) { |
1318 | context.isZooming = false; | |
1319 | context.dragStartX = null; | |
1320 | context.dragStartY = null; | |
1321 | } | |
1322 | ||
1323 | if (context.isPanning) { | |
1324 | context.isPanning = false; | |
1325 | context.draggingDate = null; | |
1326 | context.dateRange = null; | |
1327 | for (var i = 0; i < self.axes_.length; i++) { | |
1328 | delete self.axes_[i].draggingValue; | |
1329 | delete self.axes_[i].dragValueRange; | |
1330 | } | |
1331 | } | |
2bad4d92 DV |
1332 | |
1333 | context.tarp.uncover(); | |
cb1261cb DV |
1334 | }; |
1335 | ||
bc3e2c5d | 1336 | this.addEvent(document, 'mouseup', this.mouseUpHandler_); |
6a1aa64f DV |
1337 | }; |
1338 | ||
1339 | /** | |
1340 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
1341 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
1342 | * avoid extra redrawing, but it's tricky to avoid interactions with the status | |
1343 | * dots. | |
ccd9d7c2 | 1344 | * |
39b0e098 RK |
1345 | * @param {Number} direction the direction of the zoom rectangle. Acceptable |
1346 | * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL. | |
6a1aa64f DV |
1347 | * @param {Number} startX The X position where the drag started, in canvas |
1348 | * coordinates. | |
1349 | * @param {Number} endX The current X position of the drag, in canvas coords. | |
8b83c6cc RK |
1350 | * @param {Number} startY The Y position where the drag started, in canvas |
1351 | * coordinates. | |
1352 | * @param {Number} endY The current Y position of the drag, in canvas coords. | |
39b0e098 | 1353 | * @param {Number} prevDirection the value of direction on the previous call to |
8b83c6cc | 1354 | * this function. Used to avoid excess redrawing |
6a1aa64f DV |
1355 | * @param {Number} prevEndX The value of endX on the previous call to this |
1356 | * function. Used to avoid excess redrawing | |
8b83c6cc RK |
1357 | * @param {Number} prevEndY The value of endY on the previous call to this |
1358 | * function. Used to avoid excess redrawing | |
6a1aa64f DV |
1359 | * @private |
1360 | */ | |
7201b11e JB |
1361 | Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY, |
1362 | endY, prevDirection, prevEndX, | |
1363 | prevEndY) { | |
2cf95fff | 1364 | var ctx = this.canvas_ctx_; |
6a1aa64f DV |
1365 | |
1366 | // Clean up from the previous rect if necessary | |
39b0e098 | 1367 | if (prevDirection == Dygraph.HORIZONTAL) { |
fa54c193 FXB |
1368 | ctx.clearRect(Math.min(startX, prevEndX), this.layout_.getPlotArea().y, |
1369 | Math.abs(startX - prevEndX), this.layout_.getPlotArea().h); | |
39b0e098 | 1370 | } else if (prevDirection == Dygraph.VERTICAL){ |
fa54c193 FXB |
1371 | ctx.clearRect(this.layout_.getPlotArea().x, Math.min(startY, prevEndY), |
1372 | this.layout_.getPlotArea().w, Math.abs(startY - prevEndY)); | |
6a1aa64f DV |
1373 | } |
1374 | ||
1375 | // Draw a light-grey rectangle to show the new viewing area | |
39b0e098 | 1376 | if (direction == Dygraph.HORIZONTAL) { |
8b83c6cc RK |
1377 | if (endX && startX) { |
1378 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
fa54c193 FXB |
1379 | ctx.fillRect(Math.min(startX, endX), this.layout_.getPlotArea().y, |
1380 | Math.abs(endX - startX), this.layout_.getPlotArea().h); | |
8b83c6cc | 1381 | } |
920208fb | 1382 | } else if (direction == Dygraph.VERTICAL) { |
8b83c6cc RK |
1383 | if (endY && startY) { |
1384 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
fa54c193 FXB |
1385 | ctx.fillRect(this.layout_.getPlotArea().x, Math.min(startY, endY), |
1386 | this.layout_.getPlotArea().w, Math.abs(endY - startY)); | |
8b83c6cc | 1387 | } |
6a1aa64f | 1388 | } |
920208fb PF |
1389 | |
1390 | if (this.isUsingExcanvas_) { | |
1391 | this.currentZoomRectArgs_ = [direction, startX, endX, startY, endY, 0, 0, 0]; | |
1392 | } | |
1393 | }; | |
1394 | ||
1395 | /** | |
1396 | * Clear the zoom rectangle (and perform no zoom). | |
1397 | * @private | |
1398 | */ | |
1399 | Dygraph.prototype.clearZoomRect_ = function() { | |
1400 | this.currentZoomRectArgs_ = null; | |
1401 | this.canvas_ctx_.clearRect(0, 0, this.canvas_.width, this.canvas_.height); | |
6a1aa64f DV |
1402 | }; |
1403 | ||
1404 | /** | |
8b83c6cc RK |
1405 | * Zoom to something containing [lowX, highX]. These are pixel coordinates in |
1406 | * the canvas. The exact zoom window may be slightly larger if there are no data | |
1407 | * points near lowX or highX. Don't confuse this function with doZoomXDates, | |
1408 | * which accepts dates that match the raw data. This function redraws the graph. | |
d58ae307 | 1409 | * |
6a1aa64f DV |
1410 | * @param {Number} lowX The leftmost pixel value that should be visible. |
1411 | * @param {Number} highX The rightmost pixel value that should be visible. | |
1412 | * @private | |
1413 | */ | |
8b83c6cc | 1414 | Dygraph.prototype.doZoomX_ = function(lowX, highX) { |
920208fb | 1415 | this.currentZoomRectArgs_ = null; |
6a1aa64f | 1416 | // Find the earliest and latest dates contained in this canvasx range. |
8b83c6cc | 1417 | // Convert the call to date ranges of the raw data. |
ff022deb RK |
1418 | var minDate = this.toDataXCoord(lowX); |
1419 | var maxDate = this.toDataXCoord(highX); | |
8b83c6cc RK |
1420 | this.doZoomXDates_(minDate, maxDate); |
1421 | }; | |
6a1aa64f | 1422 | |
8b83c6cc | 1423 | /** |
b1a3b195 DV |
1424 | * Transition function to use in animations. Returns values between 0.0 |
1425 | * (totally old values) and 1.0 (totally new values) for each frame. | |
1426 | * @private | |
1427 | */ | |
1428 | Dygraph.zoomAnimationFunction = function(frame, numFrames) { | |
1429 | var k = 1.5; | |
1430 | return (1.0 - Math.pow(k, -frame)) / (1.0 - Math.pow(k, -numFrames)); | |
1431 | }; | |
1432 | ||
1433 | /** | |
8b83c6cc RK |
1434 | * Zoom to something containing [minDate, maxDate] values. Don't confuse this |
1435 | * method with doZoomX which accepts pixel coordinates. This function redraws | |
1436 | * the graph. | |
d58ae307 | 1437 | * |
8b83c6cc RK |
1438 | * @param {Number} minDate The minimum date that should be visible. |
1439 | * @param {Number} maxDate The maximum date that should be visible. | |
1440 | * @private | |
1441 | */ | |
1442 | Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) { | |
b1a3b195 DV |
1443 | // TODO(danvk): when yAxisRange is null (i.e. "fit to data", the animation |
1444 | // can produce strange effects. Rather than the y-axis transitioning slowly | |
1445 | // between values, it can jerk around.) | |
1446 | var old_window = this.xAxisRange(); | |
1447 | var new_window = [minDate, maxDate]; | |
57baab03 | 1448 | this.zoomed_x_ = true; |
b1a3b195 DV |
1449 | var that = this; |
1450 | this.doAnimatedZoom(old_window, new_window, null, null, function() { | |
1451 | if (that.attr_("zoomCallback")) { | |
1452 | that.attr_("zoomCallback")(minDate, maxDate, that.yAxisRanges()); | |
1453 | } | |
1454 | }); | |
8b83c6cc RK |
1455 | }; |
1456 | ||
1457 | /** | |
1458 | * Zoom to something containing [lowY, highY]. These are pixel coordinates in | |
d58ae307 DV |
1459 | * the canvas. This function redraws the graph. |
1460 | * | |
8b83c6cc RK |
1461 | * @param {Number} lowY The topmost pixel value that should be visible. |
1462 | * @param {Number} highY The lowest pixel value that should be visible. | |
1463 | * @private | |
1464 | */ | |
1465 | Dygraph.prototype.doZoomY_ = function(lowY, highY) { | |
920208fb | 1466 | this.currentZoomRectArgs_ = null; |
d58ae307 DV |
1467 | // Find the highest and lowest values in pixel range for each axis. |
1468 | // Note that lowY (in pixels) corresponds to the max Value (in data coords). | |
1469 | // This is because pixels increase as you go down on the screen, whereas data | |
1470 | // coordinates increase as you go up the screen. | |
b1a3b195 DV |
1471 | var oldValueRanges = this.yAxisRanges(); |
1472 | var newValueRanges = []; | |
d58ae307 | 1473 | for (var i = 0; i < this.axes_.length; i++) { |
ff022deb RK |
1474 | var hi = this.toDataYCoord(lowY, i); |
1475 | var low = this.toDataYCoord(highY, i); | |
b1a3b195 | 1476 | newValueRanges.push([low, hi]); |
d58ae307 | 1477 | } |
8b83c6cc | 1478 | |
57baab03 | 1479 | this.zoomed_y_ = true; |
b1a3b195 DV |
1480 | var that = this; |
1481 | this.doAnimatedZoom(null, null, oldValueRanges, newValueRanges, function() { | |
1482 | if (that.attr_("zoomCallback")) { | |
1483 | var xRange = that.xAxisRange(); | |
b1a3b195 DV |
1484 | that.attr_("zoomCallback")(xRange[0], xRange[1], that.yAxisRanges()); |
1485 | } | |
1486 | }); | |
8b83c6cc RK |
1487 | }; |
1488 | ||
1489 | /** | |
1490 | * Reset the zoom to the original view coordinates. This is the same as | |
1491 | * double-clicking on the graph. | |
d58ae307 | 1492 | * |
8b83c6cc RK |
1493 | * @private |
1494 | */ | |
1495 | Dygraph.prototype.doUnzoom_ = function() { | |
b1a3b195 | 1496 | var dirty = false, dirtyX = false, dirtyY = false; |
758a629f | 1497 | if (this.dateWindow_ !== null) { |
d58ae307 | 1498 | dirty = true; |
b1a3b195 | 1499 | dirtyX = true; |
8b83c6cc | 1500 | } |
d58ae307 DV |
1501 | |
1502 | for (var i = 0; i < this.axes_.length; i++) { | |
1f6a6254 | 1503 | if (typeof(this.axes_[i].valueWindow) !== 'undefined' && this.axes_[i].valueWindow !== null) { |
d58ae307 | 1504 | dirty = true; |
b1a3b195 | 1505 | dirtyY = true; |
d58ae307 | 1506 | } |
8b83c6cc RK |
1507 | } |
1508 | ||
da1369a5 DV |
1509 | // Clear any selection, since it's likely to be drawn in the wrong place. |
1510 | this.clearSelection(); | |
1511 | ||
8b83c6cc | 1512 | if (dirty) { |
57baab03 NN |
1513 | this.zoomed_x_ = false; |
1514 | this.zoomed_y_ = false; | |
b1a3b195 DV |
1515 | |
1516 | var minDate = this.rawData_[0][0]; | |
1517 | var maxDate = this.rawData_[this.rawData_.length - 1][0]; | |
1518 | ||
1519 | // With only one frame, don't bother calculating extreme ranges. | |
1520 | // TODO(danvk): merge this block w/ the code below. | |
1521 | if (!this.attr_("animatedZooms")) { | |
1522 | this.dateWindow_ = null; | |
758a629f DV |
1523 | for (i = 0; i < this.axes_.length; i++) { |
1524 | if (this.axes_[i].valueWindow !== null) { | |
b1a3b195 DV |
1525 | delete this.axes_[i].valueWindow; |
1526 | } | |
1527 | } | |
1528 | this.drawGraph_(); | |
1529 | if (this.attr_("zoomCallback")) { | |
1530 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); | |
1531 | } | |
1532 | return; | |
1533 | } | |
1534 | ||
1535 | var oldWindow=null, newWindow=null, oldValueRanges=null, newValueRanges=null; | |
1536 | if (dirtyX) { | |
1537 | oldWindow = this.xAxisRange(); | |
1538 | newWindow = [minDate, maxDate]; | |
1539 | } | |
1540 | ||
1541 | if (dirtyY) { | |
1542 | oldValueRanges = this.yAxisRanges(); | |
1543 | // TODO(danvk): this is pretty inefficient | |
1544 | var packed = this.gatherDatasets_(this.rolledSeries_, null); | |
1545 | var extremes = packed[1]; | |
1546 | ||
1547 | // this has the side-effect of modifying this.axes_. | |
1548 | // this doesn't make much sense in this context, but it's convenient (we | |
1549 | // need this.axes_[*].extremeValues) and not harmful since we'll be | |
1550 | // calling drawGraph_ shortly, which clobbers these values. | |
1551 | this.computeYAxisRanges_(extremes); | |
1552 | ||
1553 | newValueRanges = []; | |
758a629f | 1554 | for (i = 0; i < this.axes_.length; i++) { |
1f6a6254 | 1555 | var axis = this.axes_[i]; |
681a215e DV |
1556 | newValueRanges.push((axis.valueRange !== null && |
1557 | axis.valueRange !== undefined) ? | |
42a9ebb8 | 1558 | axis.valueRange : axis.extremeRange); |
b1a3b195 DV |
1559 | } |
1560 | } | |
1561 | ||
1562 | var that = this; | |
1563 | this.doAnimatedZoom(oldWindow, newWindow, oldValueRanges, newValueRanges, | |
1564 | function() { | |
1565 | that.dateWindow_ = null; | |
1566 | for (var i = 0; i < that.axes_.length; i++) { | |
758a629f | 1567 | if (that.axes_[i].valueWindow !== null) { |
b1a3b195 DV |
1568 | delete that.axes_[i].valueWindow; |
1569 | } | |
1570 | } | |
1571 | if (that.attr_("zoomCallback")) { | |
1572 | that.attr_("zoomCallback")(minDate, maxDate, that.yAxisRanges()); | |
1573 | } | |
1574 | }); | |
1575 | } | |
1576 | }; | |
1577 | ||
1578 | /** | |
1579 | * Combined animation logic for all zoom functions. | |
1580 | * either the x parameters or y parameters may be null. | |
1581 | * @private | |
1582 | */ | |
1583 | Dygraph.prototype.doAnimatedZoom = function(oldXRange, newXRange, oldYRanges, newYRanges, callback) { | |
1584 | var steps = this.attr_("animatedZooms") ? Dygraph.ANIMATION_STEPS : 1; | |
1585 | ||
1586 | var windows = []; | |
1587 | var valueRanges = []; | |
758a629f | 1588 | var step, frac; |
b1a3b195 | 1589 | |
758a629f DV |
1590 | if (oldXRange !== null && newXRange !== null) { |
1591 | for (step = 1; step <= steps; step++) { | |
1592 | frac = Dygraph.zoomAnimationFunction(step, steps); | |
b1a3b195 DV |
1593 | windows[step-1] = [oldXRange[0]*(1-frac) + frac*newXRange[0], |
1594 | oldXRange[1]*(1-frac) + frac*newXRange[1]]; | |
8b83c6cc | 1595 | } |
67e650dc | 1596 | } |
b1a3b195 | 1597 | |
758a629f DV |
1598 | if (oldYRanges !== null && newYRanges !== null) { |
1599 | for (step = 1; step <= steps; step++) { | |
1600 | frac = Dygraph.zoomAnimationFunction(step, steps); | |
b1a3b195 DV |
1601 | var thisRange = []; |
1602 | for (var j = 0; j < this.axes_.length; j++) { | |
1603 | thisRange.push([oldYRanges[j][0]*(1-frac) + frac*newYRanges[j][0], | |
1604 | oldYRanges[j][1]*(1-frac) + frac*newYRanges[j][1]]); | |
1605 | } | |
1606 | valueRanges[step-1] = thisRange; | |
1607 | } | |
1608 | } | |
1609 | ||
1610 | var that = this; | |
1611 | Dygraph.repeatAndCleanup(function(step) { | |
1612 | if (valueRanges.length) { | |
1613 | for (var i = 0; i < that.axes_.length; i++) { | |
1614 | var w = valueRanges[step][i]; | |
1615 | that.axes_[i].valueWindow = [w[0], w[1]]; | |
1616 | } | |
1617 | } | |
1618 | if (windows.length) { | |
1619 | that.dateWindow_ = windows[step]; | |
1620 | } | |
1621 | that.drawGraph_(); | |
1622 | }, steps, Dygraph.ANIMATION_DURATION / steps, callback); | |
6a1aa64f DV |
1623 | }; |
1624 | ||
1625 | /** | |
857a6931 KW |
1626 | * Get the current graph's area object. |
1627 | * | |
1628 | * Returns: {x, y, w, h} | |
6a1aa64f | 1629 | */ |
857a6931 KW |
1630 | Dygraph.prototype.getArea = function() { |
1631 | return this.plotter_.area; | |
1632 | }; | |
e863a17d | 1633 | |
857a6931 KW |
1634 | /** |
1635 | * Convert a mouse event to DOM coordinates relative to the graph origin. | |
1636 | * | |
1637 | * Returns a two-element array: [X, Y]. | |
1638 | */ | |
1639 | Dygraph.prototype.eventToDomCoords = function(event) { | |
4cac8c7a | 1640 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_); |
857a6931 KW |
1641 | var canvasy = Dygraph.pageY(event) - Dygraph.findPosY(this.mouseEventElement_); |
1642 | return [canvasx, canvasy]; | |
1643 | }; | |
4cac8c7a | 1644 | |
857a6931 KW |
1645 | /** |
1646 | * Given a canvas X coordinate, find the closest row. | |
1647 | * @param {Number} domX graph-relative DOM X coordinate | |
1648 | * Returns: row number, integer | |
1649 | * @private | |
1650 | */ | |
1651 | Dygraph.prototype.findClosestRow = function(domX) { | |
81cb07d6 | 1652 | var minDistX = Infinity; |
a12a78ae DV |
1653 | var pointIdx = -1, setIdx = -1; |
1654 | var sets = this.layout_.points; | |
1655 | for (var i = 0; i < sets.length; i++) { | |
1656 | var points = sets[i]; | |
1657 | var len = points.length; | |
1658 | for (var j = 0; j < len; j++) { | |
1659 | var point = points[j]; | |
1660 | if (!Dygraph.isValidPoint(point, true)) continue; | |
1661 | var dist = Math.abs(point.canvasx - domX); | |
1662 | if (dist < minDistX) { | |
1663 | minDistX = dist; | |
1664 | setIdx = i; | |
1665 | pointIdx = j; | |
1666 | } | |
a937d031 | 1667 | } |
6a1aa64f | 1668 | } |
a12a78ae DV |
1669 | |
1670 | // TODO(danvk): remove this function; it's trivial and has only one use. | |
1671 | return this.idxToRow_(setIdx, pointIdx); | |
857a6931 | 1672 | }; |
6a1aa64f | 1673 | |
857a6931 | 1674 | /** |
2a02e5dd KW |
1675 | * Given canvas X,Y coordinates, find the closest point. |
1676 | * | |
1677 | * This finds the individual data point across all visible series | |
1678 | * that's closest to the supplied DOM coordinates using the standard | |
1679 | * Euclidean X,Y distance. | |
1680 | * | |
857a6931 KW |
1681 | * @param {Number} domX graph-relative DOM X coordinate |
1682 | * @param {Number} domY graph-relative DOM Y coordinate | |
1683 | * Returns: {row, seriesName, point} | |
1684 | * @private | |
1685 | */ | |
1686 | Dygraph.prototype.findClosestPoint = function(domX, domY) { | |
81cb07d6 | 1687 | var minDist = Infinity; |
857a6931 | 1688 | var idx = -1; |
857a6931 KW |
1689 | var dist, dx, dy, point, closestPoint, closestSeries; |
1690 | for (var setIdx = 0; setIdx < this.layout_.datasets.length; ++setIdx) { | |
a12a78ae DV |
1691 | var points = this.layout_.points[setIdx]; |
1692 | for (var i = 0; i < points.length; ++i) { | |
1693 | var point = points[i]; | |
62c3d2fd | 1694 | if (!Dygraph.isValidPoint(point)) continue; |
857a6931 KW |
1695 | dx = point.canvasx - domX; |
1696 | dy = point.canvasy - domY; | |
1697 | dist = dx * dx + dy * dy; | |
81cb07d6 | 1698 | if (dist < minDist) { |
62c3d2fd | 1699 | minDist = dist; |
a937d031 KW |
1700 | closestPoint = point; |
1701 | closestSeries = setIdx; | |
1702 | idx = i; | |
1703 | } | |
857a6931 KW |
1704 | } |
1705 | } | |
1706 | var name = this.layout_.setNames[closestSeries]; | |
1707 | return { | |
81cb07d6 | 1708 | row: idx + this.getLeftBoundary_(), |
857a6931 KW |
1709 | seriesName: name, |
1710 | point: closestPoint | |
1711 | }; | |
1712 | }; | |
1713 | ||
1714 | /** | |
1715 | * Given canvas X,Y coordinates, find the touched area in a stacked graph. | |
2a02e5dd KW |
1716 | * |
1717 | * This first finds the X data point closest to the supplied DOM X coordinate, | |
1718 | * then finds the series which puts the Y coordinate on top of its filled area, | |
1719 | * using linear interpolation between adjacent point pairs. | |
1720 | * | |
857a6931 KW |
1721 | * @param {Number} domX graph-relative DOM X coordinate |
1722 | * @param {Number} domY graph-relative DOM Y coordinate | |
1723 | * Returns: {row, seriesName, point} | |
1724 | * @private | |
1725 | */ | |
1726 | Dygraph.prototype.findStackedPoint = function(domX, domY) { | |
1727 | var row = this.findClosestRow(domX); | |
81cb07d6 KW |
1728 | var boundary = this.getLeftBoundary_(); |
1729 | var rowIdx = row - boundary; | |
a12a78ae | 1730 | var sets = this.layout_.points; |
857a6931 KW |
1731 | var closestPoint, closestSeries; |
1732 | for (var setIdx = 0; setIdx < this.layout_.datasets.length; ++setIdx) { | |
a12a78ae DV |
1733 | var points = this.layout_.points[setIdx]; |
1734 | if (rowIdx >= points.length) continue; | |
1735 | var p1 = points[rowIdx]; | |
62c3d2fd | 1736 | if (!Dygraph.isValidPoint(p1)) continue; |
857a6931 | 1737 | var py = p1.canvasy; |
a12a78ae | 1738 | if (domX > p1.canvasx && rowIdx + 1 < points.length) { |
857a6931 | 1739 | // interpolate series Y value using next point |
a12a78ae | 1740 | var p2 = points[rowIdx + 1]; |
62c3d2fd KW |
1741 | if (Dygraph.isValidPoint(p2)) { |
1742 | var dx = p2.canvasx - p1.canvasx; | |
1743 | if (dx > 0) { | |
1744 | var r = (domX - p1.canvasx) / dx; | |
1745 | py += r * (p2.canvasy - p1.canvasy); | |
1746 | } | |
416b05ad | 1747 | } |
81cb07d6 | 1748 | } else if (domX < p1.canvasx && rowIdx > 0) { |
857a6931 | 1749 | // interpolate series Y value using previous point |
a12a78ae | 1750 | var p0 = points[rowIdx - 1]; |
62c3d2fd KW |
1751 | if (Dygraph.isValidPoint(p0)) { |
1752 | var dx = p1.canvasx - p0.canvasx; | |
1753 | if (dx > 0) { | |
1754 | var r = (p1.canvasx - domX) / dx; | |
1755 | py += r * (p0.canvasy - p1.canvasy); | |
1756 | } | |
12e4c741 | 1757 | } |
6a1aa64f | 1758 | } |
857a6931 | 1759 | // Stop if the point (domX, py) is above this series' upper edge |
42a9ebb8 | 1760 | if (setIdx === 0 || py < domY) { |
a937d031 KW |
1761 | closestPoint = p1; |
1762 | closestSeries = setIdx; | |
1763 | } | |
6a1aa64f | 1764 | } |
857a6931 KW |
1765 | var name = this.layout_.setNames[closestSeries]; |
1766 | return { | |
1767 | row: row, | |
1768 | seriesName: name, | |
1769 | point: closestPoint | |
1770 | }; | |
1771 | }; | |
6a1aa64f | 1772 | |
857a6931 | 1773 | /** |
6a1aa64f DV |
1774 | * When the mouse moves in the canvas, display information about a nearby data |
1775 | * point and draw dots over those points in the data series. This function | |
1776 | * takes care of cleanup of previously-drawn dots. | |
1777 | * @param {Object} event The mousemove event from the browser. | |
1778 | * @private | |
1779 | */ | |
285a6bda | 1780 | Dygraph.prototype.mouseMove_ = function(event) { |
e863a17d | 1781 | // This prevents JS errors when mousing over the canvas before data loads. |
4cac8c7a | 1782 | var points = this.layout_.points; |
a12a78ae | 1783 | if (points === undefined || points === null) return; |
e863a17d | 1784 | |
857a6931 KW |
1785 | var canvasCoords = this.eventToDomCoords(event); |
1786 | var canvasx = canvasCoords[0]; | |
1787 | var canvasy = canvasCoords[1]; | |
6a1aa64f | 1788 | |
857a6931 KW |
1789 | var highlightSeriesOpts = this.attr_("highlightSeriesOpts"); |
1790 | var selectionChanged = false; | |
b9a3ece4 | 1791 | if (highlightSeriesOpts && !this.lockedSet_) { |
857a6931 KW |
1792 | var closest; |
1793 | if (this.attr_("stackedGraph")) { | |
1794 | closest = this.findStackedPoint(canvasx, canvasy); | |
1795 | } else { | |
1796 | closest = this.findClosestPoint(canvasx, canvasy); | |
43af96e7 | 1797 | } |
857a6931 | 1798 | selectionChanged = this.setSelection(closest.row, closest.seriesName); |
416b05ad | 1799 | } else { |
857a6931 KW |
1800 | var idx = this.findClosestRow(canvasx); |
1801 | selectionChanged = this.setSelection(idx); | |
12e4c741 | 1802 | } |
43af96e7 | 1803 | |
857a6931 KW |
1804 | var callback = this.attr_("highlightCallback"); |
1805 | if (callback && selectionChanged) { | |
1806 | callback(event, this.lastx_, this.selPoints_, this.lastRow_, this.highlightSet_); | |
12e4c741 | 1807 | } |
239c712d | 1808 | }; |
b258a3da | 1809 | |
239c712d | 1810 | /** |
81cb07d6 | 1811 | * Fetch left offset from first defined boundaryIds record (see bug #236). |
e2c21500 | 1812 | * @private |
81cb07d6 KW |
1813 | */ |
1814 | Dygraph.prototype.getLeftBoundary_ = function() { | |
1815 | for (var i = 0; i < this.boundaryIds_.length; i++) { | |
1816 | if (this.boundaryIds_[i] !== undefined) { | |
1817 | return this.boundaryIds_[i][0]; | |
1818 | } | |
1819 | } | |
1820 | return 0; | |
1821 | }; | |
1822 | ||
1823 | /** | |
1903f1e4 | 1824 | * Transforms layout_.points index into data row number. |
2ddb1197 | 1825 | * @param int layout_.points index |
1903f1e4 | 1826 | * @return int row number, or -1 if none could be found. |
2ddb1197 SC |
1827 | * @private |
1828 | */ | |
a12a78ae DV |
1829 | Dygraph.prototype.idxToRow_ = function(setIdx, rowIdx) { |
1830 | if (rowIdx < 0) return -1; | |
2ddb1197 | 1831 | |
81cb07d6 | 1832 | var boundary = this.getLeftBoundary_(); |
a12a78ae DV |
1833 | return boundary + rowIdx; |
1834 | // for (var setIdx = 0; setIdx < this.layout_.datasets.length; ++setIdx) { | |
1835 | // var set = this.layout_.datasets[setIdx]; | |
1836 | // if (idx < set.length) { | |
1837 | // return boundary + idx; | |
1838 | // } | |
1839 | // idx -= set.length; | |
1840 | // } | |
1841 | // return -1; | |
1903f1e4 | 1842 | }; |
2ddb1197 | 1843 | |
857a6931 KW |
1844 | Dygraph.prototype.animateSelection_ = function(direction) { |
1845 | var totalSteps = 10; | |
1846 | var millis = 30; | |
1d44ee5e KW |
1847 | if (this.fadeLevel === undefined) this.fadeLevel = 0; |
1848 | if (this.animateId === undefined) this.animateId = 0; | |
857a6931 KW |
1849 | var start = this.fadeLevel; |
1850 | var steps = direction < 0 ? start : totalSteps - start; | |
1851 | if (steps <= 0) { | |
1852 | if (this.fadeLevel) { | |
1853 | this.updateSelection_(1.0); | |
1854 | } | |
1855 | return; | |
1856 | } | |
1857 | ||
1858 | var thisId = ++this.animateId; | |
1859 | var that = this; | |
475f7420 KW |
1860 | Dygraph.repeatAndCleanup( |
1861 | function(n) { | |
1862 | // ignore simultaneous animations | |
1863 | if (that.animateId != thisId) return; | |
1864 | ||
1865 | that.fadeLevel += direction; | |
1866 | if (that.fadeLevel === 0) { | |
1867 | that.clearSelection(); | |
1868 | } else { | |
1869 | that.updateSelection_(that.fadeLevel / totalSteps); | |
1870 | } | |
1871 | }, | |
1872 | steps, millis, function() {}); | |
857a6931 KW |
1873 | }; |
1874 | ||
2ddb1197 | 1875 | /** |
239c712d NAG |
1876 | * Draw dots over the selectied points in the data series. This function |
1877 | * takes care of cleanup of previously-drawn dots. | |
1878 | * @private | |
1879 | */ | |
857a6931 | 1880 | Dygraph.prototype.updateSelection_ = function(opt_animFraction) { |
e2c21500 DV |
1881 | var defaultPrevented = this.cascadeEvents_('select', { |
1882 | selectedX: this.lastx_, | |
1883 | selectedPoints: this.selPoints_ | |
1884 | }); | |
1885 | // TODO(danvk): use defaultPrevented here? | |
1886 | ||
6a1aa64f | 1887 | // Clear the previously drawn vertical, if there is one |
758a629f | 1888 | var i; |
2cf95fff | 1889 | var ctx = this.canvas_ctx_; |
857a6931 KW |
1890 | if (this.attr_('highlightSeriesOpts')) { |
1891 | ctx.clearRect(0, 0, this.width_, this.height_); | |
afdb20d8 | 1892 | var alpha = 1.0 - this.attr_('highlightSeriesBackgroundAlpha'); |
857a6931 | 1893 | if (alpha) { |
2a02e5dd KW |
1894 | // Activating background fade includes an animation effect for a gradual |
1895 | // fade. TODO(klausw): make this independently configurable if it causes | |
1896 | // issues? Use a shared preference to control animations? | |
1897 | var animateBackgroundFade = true; | |
1898 | if (animateBackgroundFade) { | |
857a6931 KW |
1899 | if (opt_animFraction === undefined) { |
1900 | // start a new animation | |
1901 | this.animateSelection_(1); | |
1902 | return; | |
1903 | } | |
1904 | alpha *= opt_animFraction; | |
1905 | } | |
1906 | ctx.fillStyle = 'rgba(255,255,255,' + alpha + ')'; | |
1907 | ctx.fillRect(0, 0, this.width_, this.height_); | |
1908 | } | |
38e3d209 DV |
1909 | |
1910 | // Redraw only the highlighted series in the interactive canvas (not the | |
1911 | // static plot canvas, which is where series are usually drawn). | |
1912 | this.plotter_._renderLineChart(this.highlightSet_, ctx); | |
857a6931 | 1913 | } else if (this.previousVerticalX_ >= 0) { |
46dde5f9 DV |
1914 | // Determine the maximum highlight circle size. |
1915 | var maxCircleSize = 0; | |
227b93cc | 1916 | var labels = this.attr_('labels'); |
758a629f | 1917 | for (i = 1; i < labels.length; i++) { |
227b93cc | 1918 | var r = this.attr_('highlightCircleSize', labels[i]); |
46dde5f9 DV |
1919 | if (r > maxCircleSize) maxCircleSize = r; |
1920 | } | |
6a1aa64f | 1921 | var px = this.previousVerticalX_; |
46dde5f9 DV |
1922 | ctx.clearRect(px - maxCircleSize - 1, 0, |
1923 | 2 * maxCircleSize + 2, this.height_); | |
6a1aa64f DV |
1924 | } |
1925 | ||
920208fb PF |
1926 | if (this.isUsingExcanvas_ && this.currentZoomRectArgs_) { |
1927 | Dygraph.prototype.drawZoomRect_.apply(this, this.currentZoomRectArgs_); | |
1928 | } | |
1929 | ||
d160cc3b | 1930 | if (this.selPoints_.length > 0) { |
6a1aa64f | 1931 | // Draw colored circles over the center of each selected point |
e9fe4a2f | 1932 | var canvasx = this.selPoints_[0].canvasx; |
43af96e7 | 1933 | ctx.save(); |
758a629f | 1934 | for (i = 0; i < this.selPoints_.length; i++) { |
e9fe4a2f DV |
1935 | var pt = this.selPoints_[i]; |
1936 | if (!Dygraph.isOK(pt.canvasy)) continue; | |
1937 | ||
1938 | var circleSize = this.attr_('highlightCircleSize', pt.name); | |
5879307d | 1939 | var callback = this.attr_("drawHighlightPointCallback", pt.name); |
a8ef67a8 | 1940 | var color = this.plotter_.colors[pt.name]; |
78e58af4 RK |
1941 | if (!callback) { |
1942 | callback = Dygraph.Circles.DEFAULT; | |
1943 | } | |
a8ef67a8 KW |
1944 | ctx.lineWidth = this.attr_('strokeWidth', pt.name); |
1945 | ctx.strokeStyle = color; | |
1946 | ctx.fillStyle = color; | |
78e58af4 | 1947 | callback(this.g, pt.name, ctx, canvasx, pt.canvasy, |
a8ef67a8 | 1948 | color, circleSize); |
6a1aa64f DV |
1949 | } |
1950 | ctx.restore(); | |
1951 | ||
1952 | this.previousVerticalX_ = canvasx; | |
1953 | } | |
1954 | }; | |
1955 | ||
1956 | /** | |
629a09ae DV |
1957 | * Manually set the selected points and display information about them in the |
1958 | * legend. The selection can be cleared using clearSelection() and queried | |
1959 | * using getSelection(). | |
1960 | * @param { Integer } row number that should be highlighted (i.e. appear with | |
1961 | * hover dots on the chart). Set to false to clear any selection. | |
857a6931 KW |
1962 | * @param { seriesName } optional series name to highlight that series with the |
1963 | * the highlightSeriesOpts setting. | |
b9a3ece4 KW |
1964 | * @param { locked } optional If true, keep seriesName selected when mousing |
1965 | * over the graph, disabling closest-series highlighting. Call clearSelection() | |
1966 | * to unlock it. | |
239c712d | 1967 | */ |
b9a3ece4 | 1968 | Dygraph.prototype.setSelection = function(row, opt_seriesName, opt_locked) { |
239c712d NAG |
1969 | // Extract the points we've selected |
1970 | this.selPoints_ = []; | |
50360fd0 | 1971 | |
239c712d | 1972 | if (row !== false) { |
81cb07d6 | 1973 | row -= this.getLeftBoundary_(); |
16269f6e | 1974 | } |
50360fd0 | 1975 | |
857a6931 | 1976 | var changed = false; |
16269f6e | 1977 | if (row !== false && row >= 0) { |
857a6931 KW |
1978 | if (row != this.lastRow_) changed = true; |
1979 | this.lastRow_ = row; | |
82c6fe4d KW |
1980 | for (var setIdx = 0; setIdx < this.layout_.datasets.length; ++setIdx) { |
1981 | var set = this.layout_.datasets[setIdx]; | |
1982 | if (row < set.length) { | |
a12a78ae | 1983 | var point = this.layout_.points[setIdx][row]; |
ccd9d7c2 | 1984 | |
38f33a44 | 1985 | if (this.attr_("stackedGraph")) { |
a12a78ae | 1986 | point = this.layout_.unstackPointAtIndex(setIdx, row); |
38f33a44 | 1987 | } |
ccd9d7c2 | 1988 | |
42a9ebb8 | 1989 | if (point.yval !== null) this.selPoints_.push(point); |
16269f6e | 1990 | } |
239c712d | 1991 | } |
857a6931 KW |
1992 | } else { |
1993 | if (this.lastRow_ >= 0) changed = true; | |
1994 | this.lastRow_ = -1; | |
16269f6e | 1995 | } |
50360fd0 | 1996 | |
16269f6e | 1997 | if (this.selPoints_.length) { |
239c712d | 1998 | this.lastx_ = this.selPoints_[0].xval; |
239c712d | 1999 | } else { |
857a6931 | 2000 | this.lastx_ = -1; |
239c712d NAG |
2001 | } |
2002 | ||
857a6931 KW |
2003 | if (opt_seriesName !== undefined) { |
2004 | if (this.highlightSet_ !== opt_seriesName) changed = true; | |
2005 | this.highlightSet_ = opt_seriesName; | |
239c712d NAG |
2006 | } |
2007 | ||
b9a3ece4 KW |
2008 | if (opt_locked !== undefined) { |
2009 | this.lockedSet_ = opt_locked; | |
2010 | } | |
2011 | ||
857a6931 KW |
2012 | if (changed) { |
2013 | this.updateSelection_(undefined); | |
2014 | } | |
2015 | return changed; | |
239c712d NAG |
2016 | }; |
2017 | ||
2018 | /** | |
6a1aa64f DV |
2019 | * The mouse has left the canvas. Clear out whatever artifacts remain |
2020 | * @param {Object} event the mouseout event from the browser. | |
2021 | * @private | |
2022 | */ | |
285a6bda | 2023 | Dygraph.prototype.mouseOut_ = function(event) { |
a4c6a67c AV |
2024 | if (this.attr_("unhighlightCallback")) { |
2025 | this.attr_("unhighlightCallback")(event); | |
2026 | } | |
2027 | ||
b9a3ece4 | 2028 | if (this.attr_("hideOverlayOnMouseOut") && !this.lockedSet_) { |
239c712d | 2029 | this.clearSelection(); |
43af96e7 | 2030 | } |
6a1aa64f DV |
2031 | }; |
2032 | ||
239c712d | 2033 | /** |
629a09ae DV |
2034 | * Clears the current selection (i.e. points that were highlighted by moving |
2035 | * the mouse over the chart). | |
239c712d NAG |
2036 | */ |
2037 | Dygraph.prototype.clearSelection = function() { | |
e2c21500 DV |
2038 | this.cascadeEvents_('deselect', {}); |
2039 | ||
b9a3ece4 | 2040 | this.lockedSet_ = false; |
239c712d | 2041 | // Get rid of the overlay data |
857a6931 KW |
2042 | if (this.fadeLevel) { |
2043 | this.animateSelection_(-1); | |
2044 | return; | |
2045 | } | |
2cf95fff | 2046 | this.canvas_ctx_.clearRect(0, 0, this.width_, this.height_); |
857a6931 | 2047 | this.fadeLevel = 0; |
239c712d NAG |
2048 | this.selPoints_ = []; |
2049 | this.lastx_ = -1; | |
857a6931 KW |
2050 | this.lastRow_ = -1; |
2051 | this.highlightSet_ = null; | |
758a629f | 2052 | }; |
239c712d | 2053 | |
103b7292 | 2054 | /** |
629a09ae DV |
2055 | * Returns the number of the currently selected row. To get data for this row, |
2056 | * you can use the getValue method. | |
2057 | * @return { Integer } row number, or -1 if nothing is selected | |
103b7292 NAG |
2058 | */ |
2059 | Dygraph.prototype.getSelection = function() { | |
2060 | if (!this.selPoints_ || this.selPoints_.length < 1) { | |
2061 | return -1; | |
2062 | } | |
50360fd0 | 2063 | |
a12a78ae DV |
2064 | for (var setIdx = 0; setIdx < this.layout_.points.length; setIdx++) { |
2065 | var points = this.layout_.points[setIdx]; | |
2066 | for (var row = 0; row < points.length; row++) { | |
2067 | if (points[row].x == this.selPoints_[0].x) { | |
2068 | return row + this.getLeftBoundary_(); | |
2069 | } | |
103b7292 NAG |
2070 | } |
2071 | } | |
2072 | return -1; | |
2e1fcf1a | 2073 | }; |
103b7292 | 2074 | |
e2c21500 DV |
2075 | /** |
2076 | * Returns the name of the currently-highlighted series. | |
2077 | * Only available when the highlightSeriesOpts option is in use. | |
2078 | */ | |
857a6931 KW |
2079 | Dygraph.prototype.getHighlightSeries = function() { |
2080 | return this.highlightSet_; | |
2081 | }; | |
2082 | ||
19589a3e | 2083 | /** |
6a1aa64f DV |
2084 | * Fires when there's data available to be graphed. |
2085 | * @param {String} data Raw CSV data to be plotted | |
2086 | * @private | |
2087 | */ | |
285a6bda | 2088 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f | 2089 | this.rawData_ = this.parseCSV_(data); |
26ca7938 | 2090 | this.predraw_(); |
6a1aa64f DV |
2091 | }; |
2092 | ||
6a1aa64f DV |
2093 | /** |
2094 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
2095 | * @private | |
2096 | */ | |
285a6bda | 2097 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f | 2098 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
7201b11e | 2099 | var range; |
6a1aa64f | 2100 | if (this.dateWindow_) { |
7201b11e | 2101 | range = [this.dateWindow_[0], this.dateWindow_[1]]; |
6a1aa64f | 2102 | } else { |
395e98a3 | 2103 | range = this.fullXRange_(); |
7201b11e JB |
2104 | } |
2105 | ||
48e614ac DV |
2106 | var xAxisOptionsView = this.optionsViewForAxis_('x'); |
2107 | var xTicks = xAxisOptionsView('ticker')( | |
2108 | range[0], | |
2109 | range[1], | |
2110 | this.width_, // TODO(danvk): should be area.width | |
2111 | xAxisOptionsView, | |
2112 | this); | |
2113 | // var msg = 'ticker(' + range[0] + ', ' + range[1] + ', ' + this.width_ + ', ' + this.attr_('pixelsPerXLabel') + ') -> ' + JSON.stringify(xTicks); | |
2114 | // console.log(msg); | |
b2c9222a | 2115 | this.layout_.setXTicks(xTicks); |
32988383 DV |
2116 | }; |
2117 | ||
629a09ae DV |
2118 | /** |
2119 | * @private | |
2120 | * Computes the range of the data series (including confidence intervals). | |
2121 | * @param { [Array] } series either [ [x1, y1], [x2, y2], ... ] or | |
2122 | * [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... | |
2123 | * @return [low, high] | |
2124 | */ | |
5011e7a1 | 2125 | Dygraph.prototype.extremeValues_ = function(series) { |
758a629f | 2126 | var minY = null, maxY = null, j, y; |
5011e7a1 | 2127 | |
9922b78b | 2128 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
5011e7a1 DV |
2129 | if (bars) { |
2130 | // With custom bars, maxY is the max of the high values. | |
758a629f DV |
2131 | for (j = 0; j < series.length; j++) { |
2132 | y = series[j][1][0]; | |
44477387 | 2133 | if (y === null || isNaN(y)) continue; |
5011e7a1 DV |
2134 | var low = y - series[j][1][1]; |
2135 | var high = y + series[j][1][2]; | |
2136 | if (low > y) low = y; // this can happen with custom bars, | |
2137 | if (high < y) high = y; // e.g. in tests/custom-bars.html | |
758a629f | 2138 | if (maxY === null || high > maxY) { |
5011e7a1 DV |
2139 | maxY = high; |
2140 | } | |
758a629f | 2141 | if (minY === null || low < minY) { |
5011e7a1 DV |
2142 | minY = low; |
2143 | } | |
2144 | } | |
2145 | } else { | |
758a629f DV |
2146 | for (j = 0; j < series.length; j++) { |
2147 | y = series[j][1]; | |
d12999d3 | 2148 | if (y === null || isNaN(y)) continue; |
758a629f | 2149 | if (maxY === null || y > maxY) { |
5011e7a1 DV |
2150 | maxY = y; |
2151 | } | |
758a629f | 2152 | if (minY === null || y < minY) { |
5011e7a1 DV |
2153 | minY = y; |
2154 | } | |
2155 | } | |
2156 | } | |
2157 | ||
2158 | return [minY, maxY]; | |
2159 | }; | |
2160 | ||
6a1aa64f | 2161 | /** |
629a09ae | 2162 | * @private |
26ca7938 DV |
2163 | * This function is called once when the chart's data is changed or the options |
2164 | * dictionary is updated. It is _not_ called when the user pans or zooms. The | |
2165 | * idea is that values derived from the chart's data can be computed here, | |
2166 | * rather than every time the chart is drawn. This includes things like the | |
2167 | * number of axes, rolling averages, etc. | |
2168 | */ | |
2169 | Dygraph.prototype.predraw_ = function() { | |
7153e001 DV |
2170 | var start = new Date(); |
2171 | ||
26ca7938 DV |
2172 | // TODO(danvk): move more computations out of drawGraph_ and into here. |
2173 | this.computeYAxes_(); | |
2174 | ||
2175 | // Create a new plotter. | |
f417e3d3 | 2176 | if (this.plotter_) { |
1748a51c | 2177 | this.cascadeEvents_('clearChart'); |
f417e3d3 DV |
2178 | this.plotter_.clear(); |
2179 | } | |
26ca7938 | 2180 | this.plotter_ = new DygraphCanvasRenderer(this, |
2cf95fff RK |
2181 | this.hidden_, |
2182 | this.hidden_ctx_, | |
0e23cfc6 | 2183 | this.layout_); |
26ca7938 | 2184 | |
0abfbd7e DV |
2185 | // The roller sits in the bottom left corner of the chart. We don't know where |
2186 | // this will be until the options are available, so it's positioned here. | |
8c69de65 | 2187 | this.createRollInterface_(); |
26ca7938 | 2188 | |
e2c21500 | 2189 | this.cascadeEvents_('predraw'); |
0abfbd7e | 2190 | |
ccd9d7c2 PF |
2191 | if (this.rangeSelector_) { |
2192 | this.rangeSelector_.renderStaticLayer(); | |
2193 | } | |
2194 | ||
b1a3b195 DV |
2195 | // Convert the raw data (a 2D array) into the internal format and compute |
2196 | // rolling averages. | |
2197 | this.rolledSeries_ = [null]; // x-axis is the first series and it's special | |
395e98a3 | 2198 | for (var i = 1; i < this.numColumns(); i++) { |
c1780ad0 RK |
2199 | // var logScale = this.attr_('logscale', i); // TODO(klausw): this looks wrong // konigsberg thinks so too. |
2200 | var logScale = this.attr_('logscale'); | |
04c104d7 | 2201 | var series = this.extractSeries_(this.rawData_, i, logScale); |
b1a3b195 DV |
2202 | series = this.rollingAverage(series, this.rollPeriod_); |
2203 | this.rolledSeries_.push(series); | |
2204 | } | |
2205 | ||
26ca7938 DV |
2206 | // If the data or options have changed, then we'd better redraw. |
2207 | this.drawGraph_(); | |
4b4d1a63 DV |
2208 | |
2209 | // This is used to determine whether to do various animations. | |
2210 | var end = new Date(); | |
2211 | this.drawingTimeMs_ = (end - start); | |
26ca7938 DV |
2212 | }; |
2213 | ||
2214 | /** | |
b1a3b195 DV |
2215 | * Loop over all fields and create datasets, calculating extreme y-values for |
2216 | * each series and extreme x-indices as we go. | |
fc4e84fa | 2217 | * |
b1a3b195 DV |
2218 | * dateWindow is passed in as an explicit parameter so that we can compute |
2219 | * extreme values "speculatively", i.e. without actually setting state on the | |
2220 | * dygraph. | |
fc4e84fa | 2221 | * |
b1a3b195 DV |
2222 | * TODO(danvk): make this more of a true function |
2223 | * @return [ datasets, seriesExtremes, boundaryIds ] | |
6a1aa64f DV |
2224 | * @private |
2225 | */ | |
b1a3b195 DV |
2226 | Dygraph.prototype.gatherDatasets_ = function(rolledSeries, dateWindow) { |
2227 | var boundaryIds = []; | |
354e15ab DE |
2228 | var cumulative_y = []; // For stacked series. |
2229 | var datasets = []; | |
f09fc545 | 2230 | var extremes = {}; // series name -> [low, high] |
758a629f | 2231 | var i, j, k; |
f09fc545 | 2232 | |
b1a3b195 DV |
2233 | // Loop over the fields (series). Go from the last to the first, |
2234 | // because if they're stacked that's how we accumulate the values. | |
2235 | var num_series = rolledSeries.length - 1; | |
758a629f | 2236 | for (i = num_series; i >= 1; i--) { |
1cf11047 DV |
2237 | if (!this.visibility()[i - 1]) continue; |
2238 | ||
16879a6b DV |
2239 | // Note: this copy _is_ necessary at the moment. |
2240 | // If you remove it, it breaks zooming with error bars on. | |
2241 | // TODO(danvk): investigate further & write a test for this. | |
2242 | var series = []; | |
2243 | for (j = 0; j < rolledSeries[i].length; j++) { | |
2244 | series.push(rolledSeries[i][j]); | |
2245 | } | |
2f5e7e1a | 2246 | |
6a1aa64f | 2247 | // Prune down to the desired range, if necessary (for zooming) |
1a26f3fb DV |
2248 | // Because there can be lines going to points outside of the visible area, |
2249 | // we actually prune to visible points, plus one on either side. | |
9922b78b | 2250 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
b1a3b195 DV |
2251 | if (dateWindow) { |
2252 | var low = dateWindow[0]; | |
2253 | var high = dateWindow[1]; | |
6a1aa64f | 2254 | var pruned = []; |
1a26f3fb DV |
2255 | // TODO(danvk): do binary search instead of linear search. |
2256 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. | |
2257 | var firstIdx = null, lastIdx = null; | |
758a629f | 2258 | for (k = 0; k < series.length; k++) { |
1a26f3fb DV |
2259 | if (series[k][0] >= low && firstIdx === null) { |
2260 | firstIdx = k; | |
2261 | } | |
2262 | if (series[k][0] <= high) { | |
2263 | lastIdx = k; | |
6a1aa64f DV |
2264 | } |
2265 | } | |
1a26f3fb DV |
2266 | if (firstIdx === null) firstIdx = 0; |
2267 | if (firstIdx > 0) firstIdx--; | |
2268 | if (lastIdx === null) lastIdx = series.length - 1; | |
2269 | if (lastIdx < series.length - 1) lastIdx++; | |
b1a3b195 | 2270 | boundaryIds[i-1] = [firstIdx, lastIdx]; |
758a629f | 2271 | for (k = firstIdx; k <= lastIdx; k++) { |
1a26f3fb | 2272 | pruned.push(series[k]); |
6a1aa64f DV |
2273 | } |
2274 | series = pruned; | |
16269f6e | 2275 | } else { |
b1a3b195 | 2276 | boundaryIds[i-1] = [0, series.length-1]; |
6a1aa64f DV |
2277 | } |
2278 | ||
f09fc545 | 2279 | var seriesExtremes = this.extremeValues_(series); |
5011e7a1 | 2280 | |
6a1aa64f | 2281 | if (bars) { |
758a629f | 2282 | for (j=0; j<series.length; j++) { |
5061b42f DV |
2283 | series[j] = [series[j][0], |
2284 | series[j][1][0], | |
2285 | series[j][1][1], | |
2286 | series[j][1][2]]; | |
354e15ab | 2287 | } |
43af96e7 | 2288 | } else if (this.attr_("stackedGraph")) { |
43af96e7 NK |
2289 | var l = series.length; |
2290 | var actual_y; | |
758a629f | 2291 | for (j = 0; j < l; j++) { |
354e15ab DE |
2292 | // If one data set has a NaN, let all subsequent stacked |
2293 | // sets inherit the NaN -- only start at 0 for the first set. | |
2294 | var x = series[j][0]; | |
41b0f691 | 2295 | if (cumulative_y[x] === undefined) { |
354e15ab | 2296 | cumulative_y[x] = 0; |
41b0f691 | 2297 | } |
43af96e7 NK |
2298 | |
2299 | actual_y = series[j][1]; | |
04c104d7 KW |
2300 | if (actual_y === null) { |
2301 | series[j] = [x, null]; | |
2302 | continue; | |
2303 | } | |
2304 | ||
354e15ab | 2305 | cumulative_y[x] += actual_y; |
43af96e7 | 2306 | |
758a629f | 2307 | series[j] = [x, cumulative_y[x]]; |
43af96e7 | 2308 | |
41b0f691 DV |
2309 | if (cumulative_y[x] > seriesExtremes[1]) { |
2310 | seriesExtremes[1] = cumulative_y[x]; | |
2311 | } | |
2312 | if (cumulative_y[x] < seriesExtremes[0]) { | |
2313 | seriesExtremes[0] = cumulative_y[x]; | |
2314 | } | |
43af96e7 | 2315 | } |
6a1aa64f | 2316 | } |
354e15ab | 2317 | |
b1a3b195 DV |
2318 | var seriesName = this.attr_("labels")[i]; |
2319 | extremes[seriesName] = seriesExtremes; | |
354e15ab | 2320 | datasets[i] = series; |
6a1aa64f DV |
2321 | } |
2322 | ||
7d463f49 KW |
2323 | // For stacked graphs, a NaN value for any point in the sum should create a |
2324 | // clean gap in the graph. Back-propagate NaNs to all points at this X value. | |
2325 | if (this.attr_("stackedGraph")) { | |
2326 | for (k = datasets.length - 1; k >= 0; --k) { | |
2327 | // Use the first nonempty dataset to get X values. | |
2328 | if (!datasets[k]) continue; | |
2329 | for (j = 0; j < datasets[k].length; j++) { | |
2330 | var x = datasets[k][j][0]; | |
2331 | if (isNaN(cumulative_y[x])) { | |
2332 | // Set all Y values to NaN at that X value. | |
2333 | for (i = datasets.length - 1; i >= 0; i--) { | |
2334 | if (!datasets[i]) continue; | |
2335 | datasets[i][j][1] = NaN; | |
2336 | } | |
2337 | } | |
2338 | } | |
2339 | break; | |
2340 | } | |
2341 | } | |
2342 | ||
b1a3b195 DV |
2343 | return [ datasets, extremes, boundaryIds ]; |
2344 | }; | |
2345 | ||
2346 | /** | |
2347 | * Update the graph with new data. This method is called when the viewing area | |
2348 | * has changed. If the underlying data or options have changed, predraw_ will | |
2349 | * be called before drawGraph_ is called. | |
2350 | * | |
b1a3b195 DV |
2351 | * @private |
2352 | */ | |
e2c21500 | 2353 | Dygraph.prototype.drawGraph_ = function() { |
b1a3b195 DV |
2354 | var start = new Date(); |
2355 | ||
b1a3b195 DV |
2356 | // This is used to set the second parameter to drawCallback, below. |
2357 | var is_initial_draw = this.is_initial_draw_; | |
2358 | this.is_initial_draw_ = false; | |
2359 | ||
b1a3b195 DV |
2360 | this.layout_.removeAllDatasets(); |
2361 | this.setColors_(); | |
758a629f | 2362 | this.attrs_.pointSize = 0.5 * this.attr_('highlightCircleSize'); |
b1a3b195 DV |
2363 | |
2364 | var packed = this.gatherDatasets_(this.rolledSeries_, this.dateWindow_); | |
2365 | var datasets = packed[0]; | |
2366 | var extremes = packed[1]; | |
2367 | this.boundaryIds_ = packed[2]; | |
2368 | ||
82c6fe4d KW |
2369 | this.setIndexByName_ = {}; |
2370 | var labels = this.attr_("labels"); | |
2371 | if (labels.length > 0) { | |
2372 | this.setIndexByName_[labels[0]] = 0; | |
2373 | } | |
857a6931 | 2374 | var dataIdx = 0; |
354e15ab | 2375 | for (var i = 1; i < datasets.length; i++) { |
82c6fe4d | 2376 | this.setIndexByName_[labels[i]] = i; |
4523c1f6 | 2377 | if (!this.visibility()[i - 1]) continue; |
82c6fe4d | 2378 | this.layout_.addDataset(labels[i], datasets[i]); |
857a6931 | 2379 | this.datasetIndex_[i] = dataIdx++; |
43af96e7 NK |
2380 | } |
2381 | ||
6faebb69 | 2382 | this.computeYAxisRanges_(extremes); |
b2c9222a DV |
2383 | this.layout_.setYAxes(this.axes_); |
2384 | ||
6a1aa64f DV |
2385 | this.addXTicks_(); |
2386 | ||
b2c9222a | 2387 | // Save the X axis zoomed status as the updateOptions call will tend to set it erroneously |
81856f70 | 2388 | var tmp_zoomed_x = this.zoomed_x_; |
6a1aa64f | 2389 | // Tell PlotKit to use this new data and render itself |
b2c9222a | 2390 | this.layout_.setDateWindow(this.dateWindow_); |
81856f70 | 2391 | this.zoomed_x_ = tmp_zoomed_x; |
6a1aa64f | 2392 | this.layout_.evaluateWithError(); |
e2c21500 | 2393 | this.renderGraph_(is_initial_draw); |
9ca829f2 DV |
2394 | |
2395 | if (this.attr_("timingName")) { | |
2396 | var end = new Date(); | |
2397 | if (console) { | |
758a629f | 2398 | console.log(this.attr_("timingName") + " - drawGraph: " + (end - start) + "ms"); |
9ca829f2 DV |
2399 | } |
2400 | } | |
2401 | }; | |
2402 | ||
e2c21500 DV |
2403 | /** |
2404 | * This does the work of drawing the chart. It assumes that the layout and axis | |
2405 | * scales have already been set (e.g. by predraw_). | |
2406 | * | |
2407 | * @private | |
2408 | */ | |
2409 | Dygraph.prototype.renderGraph_ = function(is_initial_draw) { | |
1748a51c | 2410 | this.cascadeEvents_('clearChart'); |
6a1aa64f | 2411 | this.plotter_.clear(); |
f417e3d3 | 2412 | |
98eb4713 DV |
2413 | if (this.attr_('underlayCallback')) { |
2414 | // NOTE: we pass the dygraph object to this callback twice to avoid breaking | |
2415 | // users who expect a deprecated form of this callback. | |
2416 | this.attr_('underlayCallback')( | |
2417 | this.hidden_ctx_, this.layout_.getPlotArea(), this, this); | |
2418 | } | |
2419 | ||
2420 | var e = { | |
189f8030 | 2421 | canvas: this.hidden_, |
2de7166c | 2422 | drawingContext: this.hidden_ctx_ |
98eb4713 DV |
2423 | }; |
2424 | this.cascadeEvents_('willDrawChart', e); | |
6a1aa64f | 2425 | this.plotter_.render(); |
98eb4713 | 2426 | this.cascadeEvents_('didDrawChart', e); |
8cfe592f DV |
2427 | |
2428 | // TODO(danvk): is this a performance bottleneck when panning? | |
2429 | // The interaction canvas should already be empty in that situation. | |
f6401bf6 | 2430 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
2f5e7e1a | 2431 | this.canvas_.height); |
599fb4ad | 2432 | |
4a0cb9c4 | 2433 | // Generate a static legend before any particular point is selected. |
2fccd3dc | 2434 | |
ccd9d7c2 PF |
2435 | if (this.rangeSelector_) { |
2436 | this.rangeSelector_.renderInteractiveLayer(); | |
2437 | } | |
599fb4ad | 2438 | if (this.attr_("drawCallback") !== null) { |
fe0b7c03 | 2439 | this.attr_("drawCallback")(this, is_initial_draw); |
599fb4ad | 2440 | } |
6a1aa64f DV |
2441 | }; |
2442 | ||
2443 | /** | |
629a09ae | 2444 | * @private |
26ca7938 DV |
2445 | * Determine properties of the y-axes which are independent of the data |
2446 | * currently being displayed. This includes things like the number of axes and | |
2447 | * the style of the axes. It does not include the range of each axis and its | |
2448 | * tick marks. | |
2449 | * This fills in this.axes_ and this.seriesToAxisMap_. | |
2450 | * axes_ = [ { options } ] | |
2451 | * seriesToAxisMap_ = { seriesName: 0, seriesName2: 1, ... } | |
2452 | * indices are into the axes_ array. | |
f09fc545 | 2453 | */ |
26ca7938 | 2454 | Dygraph.prototype.computeYAxes_ = function() { |
d64b8fea RK |
2455 | // Preserve valueWindow settings if they exist, and if the user hasn't |
2456 | // specified a new valueRange. | |
4dd0ac55 | 2457 | var i, valueWindows, seriesName, axis, index, opts, v; |
758a629f | 2458 | if (this.axes_ !== undefined && this.user_attrs_.hasOwnProperty("valueRange") === false) { |
d64b8fea | 2459 | valueWindows = []; |
758a629f | 2460 | for (index = 0; index < this.axes_.length; index++) { |
d64b8fea RK |
2461 | valueWindows.push(this.axes_[index].valueWindow); |
2462 | } | |
2463 | } | |
2464 | ||
00aa7f61 | 2465 | this.axes_ = [{ yAxisId : 0, g : this }]; // always have at least one y-axis. |
26ca7938 DV |
2466 | this.seriesToAxisMap_ = {}; |
2467 | ||
2468 | // Get a list of series names. | |
2469 | var labels = this.attr_("labels"); | |
1c77a3a1 | 2470 | var series = {}; |
758a629f | 2471 | for (i = 1; i < labels.length; i++) series[labels[i]] = (i - 1); |
f09fc545 DV |
2472 | |
2473 | // all options which could be applied per-axis: | |
2474 | var axisOptions = [ | |
2475 | 'includeZero', | |
2476 | 'valueRange', | |
2477 | 'labelsKMB', | |
2478 | 'labelsKMG2', | |
2479 | 'pixelsPerYLabel', | |
2480 | 'yAxisLabelWidth', | |
2481 | 'axisLabelFontSize', | |
7d0e7a0d RK |
2482 | 'axisTickSize', |
2483 | 'logscale' | |
f09fc545 DV |
2484 | ]; |
2485 | ||
2486 | // Copy global axis options over to the first axis. | |
758a629f | 2487 | for (i = 0; i < axisOptions.length; i++) { |
f09fc545 | 2488 | var k = axisOptions[i]; |
4dd0ac55 | 2489 | v = this.attr_(k); |
26ca7938 | 2490 | if (v) this.axes_[0][k] = v; |
f09fc545 DV |
2491 | } |
2492 | ||
2493 | // Go through once and add all the axes. | |
758a629f | 2494 | for (seriesName in series) { |
26ca7938 | 2495 | if (!series.hasOwnProperty(seriesName)) continue; |
758a629f DV |
2496 | axis = this.attr_("axis", seriesName); |
2497 | if (axis === null) { | |
26ca7938 | 2498 | this.seriesToAxisMap_[seriesName] = 0; |
f09fc545 DV |
2499 | continue; |
2500 | } | |
2501 | if (typeof(axis) == 'object') { | |
2502 | // Add a new axis, making a copy of its per-axis options. | |
4dd0ac55 | 2503 | opts = {}; |
26ca7938 | 2504 | Dygraph.update(opts, this.axes_[0]); |
f09fc545 | 2505 | Dygraph.update(opts, { valueRange: null }); // shouldn't inherit this. |
00aa7f61 RK |
2506 | var yAxisId = this.axes_.length; |
2507 | opts.yAxisId = yAxisId; | |
2508 | opts.g = this; | |
f09fc545 | 2509 | Dygraph.update(opts, axis); |
26ca7938 | 2510 | this.axes_.push(opts); |
00aa7f61 | 2511 | this.seriesToAxisMap_[seriesName] = yAxisId; |
f09fc545 DV |
2512 | } |
2513 | } | |
2514 | ||
2515 | // Go through one more time and assign series to an axis defined by another | |
2516 | // series, e.g. { 'Y1: { axis: {} }, 'Y2': { axis: 'Y1' } } | |
758a629f | 2517 | for (seriesName in series) { |
26ca7938 | 2518 | if (!series.hasOwnProperty(seriesName)) continue; |
758a629f | 2519 | axis = this.attr_("axis", seriesName); |
f09fc545 | 2520 | if (typeof(axis) == 'string') { |
26ca7938 | 2521 | if (!this.seriesToAxisMap_.hasOwnProperty(axis)) { |
f09fc545 DV |
2522 | this.error("Series " + seriesName + " wants to share a y-axis with " + |
2523 | "series " + axis + ", which does not define its own axis."); | |
2524 | return null; | |
2525 | } | |
26ca7938 DV |
2526 | var idx = this.seriesToAxisMap_[axis]; |
2527 | this.seriesToAxisMap_[seriesName] = idx; | |
f09fc545 DV |
2528 | } |
2529 | } | |
1c77a3a1 | 2530 | |
758a629f | 2531 | if (valueWindows !== undefined) { |
d64b8fea | 2532 | // Restore valueWindow settings. |
758a629f | 2533 | for (index = 0; index < valueWindows.length; index++) { |
d64b8fea RK |
2534 | this.axes_[index].valueWindow = valueWindows[index]; |
2535 | } | |
2536 | } | |
4dd0ac55 RV |
2537 | |
2538 | // New axes options | |
2539 | for (axis = 0; axis < this.axes_.length; axis++) { | |
2540 | if (axis === 0) { | |
2541 | opts = this.optionsViewForAxis_('y' + (axis ? '2' : '')); | |
2542 | v = opts("valueRange"); | |
2543 | if (v) this.axes_[axis].valueRange = v; | |
2544 | } else { // To keep old behavior | |
2545 | var axes = this.user_attrs_.axes; | |
2546 | if (axes && axes.y2) { | |
2547 | v = axes.y2.valueRange; | |
2548 | if (v) this.axes_[axis].valueRange = v; | |
2549 | } | |
2550 | } | |
2551 | } | |
2552 | ||
26ca7938 DV |
2553 | }; |
2554 | ||
2555 | /** | |
2556 | * Returns the number of y-axes on the chart. | |
2557 | * @return {Number} the number of axes. | |
2558 | */ | |
2559 | Dygraph.prototype.numAxes = function() { | |
2560 | var last_axis = 0; | |
2561 | for (var series in this.seriesToAxisMap_) { | |
2562 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; | |
2563 | var idx = this.seriesToAxisMap_[series]; | |
2564 | if (idx > last_axis) last_axis = idx; | |
2565 | } | |
2566 | return 1 + last_axis; | |
2567 | }; | |
2568 | ||
2569 | /** | |
629a09ae | 2570 | * @private |
b2c9222a DV |
2571 | * Returns axis properties for the given series. |
2572 | * @param { String } setName The name of the series for which to get axis | |
2573 | * properties, e.g. 'Y1'. | |
2574 | * @return { Object } The axis properties. | |
2575 | */ | |
2576 | Dygraph.prototype.axisPropertiesForSeries = function(series) { | |
2577 | // TODO(danvk): handle errors. | |
2578 | return this.axes_[this.seriesToAxisMap_[series]]; | |
2579 | }; | |
2580 | ||
2581 | /** | |
2582 | * @private | |
26ca7938 DV |
2583 | * Determine the value range and tick marks for each axis. |
2584 | * @param {Object} extremes A mapping from seriesName -> [low, high] | |
2585 | * This fills in the valueRange and ticks fields in each entry of this.axes_. | |
2586 | */ | |
2587 | Dygraph.prototype.computeYAxisRanges_ = function(extremes) { | |
2588 | // Build a map from axis number -> [list of series names] | |
758a629f DV |
2589 | var seriesForAxis = [], series; |
2590 | for (series in this.seriesToAxisMap_) { | |
26ca7938 DV |
2591 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; |
2592 | var idx = this.seriesToAxisMap_[series]; | |
2593 | while (seriesForAxis.length <= idx) seriesForAxis.push([]); | |
2594 | seriesForAxis[idx].push(series); | |
2595 | } | |
f09fc545 DV |
2596 | |
2597 | // Compute extreme values, a span and tick marks for each axis. | |
26ca7938 DV |
2598 | for (var i = 0; i < this.axes_.length; i++) { |
2599 | var axis = this.axes_[i]; | |
25f76ae3 | 2600 | |
06fc69b6 AV |
2601 | if (!seriesForAxis[i]) { |
2602 | // If no series are defined or visible then use a reasonable default | |
2603 | axis.extremeRange = [0, 1]; | |
2604 | } else { | |
1c77a3a1 | 2605 | // Calculate the extremes of extremes. |
758a629f | 2606 | series = seriesForAxis[i]; |
f09fc545 DV |
2607 | var minY = Infinity; // extremes[series[0]][0]; |
2608 | var maxY = -Infinity; // extremes[series[0]][1]; | |
ba049b89 | 2609 | var extremeMinY, extremeMaxY; |
a2da3777 | 2610 | |
f09fc545 | 2611 | for (var j = 0; j < series.length; j++) { |
a2da3777 DV |
2612 | // this skips invisible series |
2613 | if (!extremes.hasOwnProperty(series[j])) continue; | |
2614 | ||
ba049b89 NN |
2615 | // Only use valid extremes to stop null data series' from corrupting the scale. |
2616 | extremeMinY = extremes[series[j]][0]; | |
758a629f | 2617 | if (extremeMinY !== null) { |
36dfa958 | 2618 | minY = Math.min(extremeMinY, minY); |
ba049b89 NN |
2619 | } |
2620 | extremeMaxY = extremes[series[j]][1]; | |
758a629f | 2621 | if (extremeMaxY !== null) { |
36dfa958 | 2622 | maxY = Math.max(extremeMaxY, maxY); |
ba049b89 | 2623 | } |
f09fc545 DV |
2624 | } |
2625 | if (axis.includeZero && minY > 0) minY = 0; | |
2626 | ||
a2da3777 | 2627 | // Ensure we have a valid scale, otherwise default to [0, 1] for safety. |
36dfa958 | 2628 | if (minY == Infinity) minY = 0; |
a2da3777 | 2629 | if (maxY == -Infinity) maxY = 1; |
ba049b89 | 2630 | |
f09fc545 DV |
2631 | // Add some padding and round up to an integer to be human-friendly. |
2632 | var span = maxY - minY; | |
2633 | // special case: if we have no sense of scale, use +/-10% of the sole value. | |
758a629f | 2634 | if (span === 0) { span = maxY; } |
f09fc545 | 2635 | |
758a629f | 2636 | var maxAxisY, minAxisY; |
7d0e7a0d | 2637 | if (axis.logscale) { |
758a629f DV |
2638 | maxAxisY = maxY + 0.1 * span; |
2639 | minAxisY = minY; | |
ff022deb | 2640 | } else { |
758a629f DV |
2641 | maxAxisY = maxY + 0.1 * span; |
2642 | minAxisY = minY - 0.1 * span; | |
f09fc545 | 2643 | |
ff022deb RK |
2644 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. |
2645 | if (!this.attr_("avoidMinZero")) { | |
2646 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; | |
2647 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
2648 | } | |
f09fc545 | 2649 | |
ff022deb RK |
2650 | if (this.attr_("includeZero")) { |
2651 | if (maxY < 0) maxAxisY = 0; | |
2652 | if (minY > 0) minAxisY = 0; | |
2653 | } | |
f09fc545 | 2654 | } |
4cac8c7a RK |
2655 | axis.extremeRange = [minAxisY, maxAxisY]; |
2656 | } | |
2657 | if (axis.valueWindow) { | |
2658 | // This is only set if the user has zoomed on the y-axis. It is never set | |
2659 | // by a user. It takes precedence over axis.valueRange because, if you set | |
2660 | // valueRange, you'd still expect to be able to pan. | |
2661 | axis.computedValueRange = [axis.valueWindow[0], axis.valueWindow[1]]; | |
2662 | } else if (axis.valueRange) { | |
2663 | // This is a user-set value range for this axis. | |
2664 | axis.computedValueRange = [axis.valueRange[0], axis.valueRange[1]]; | |
2665 | } else { | |
2666 | axis.computedValueRange = axis.extremeRange; | |
f09fc545 DV |
2667 | } |
2668 | ||
0d64e596 DV |
2669 | // Add ticks. By default, all axes inherit the tick positions of the |
2670 | // primary axis. However, if an axis is specifically marked as having | |
2671 | // independent ticks, then that is permissible as well. | |
48e614ac DV |
2672 | var opts = this.optionsViewForAxis_('y' + (i ? '2' : '')); |
2673 | var ticker = opts('ticker'); | |
758a629f | 2674 | if (i === 0 || axis.independentTicks) { |
48e614ac DV |
2675 | axis.ticks = ticker(axis.computedValueRange[0], |
2676 | axis.computedValueRange[1], | |
2677 | this.height_, // TODO(danvk): should be area.height | |
2678 | opts, | |
2679 | this); | |
0d64e596 DV |
2680 | } else { |
2681 | var p_axis = this.axes_[0]; | |
2682 | var p_ticks = p_axis.ticks; | |
2683 | var p_scale = p_axis.computedValueRange[1] - p_axis.computedValueRange[0]; | |
2684 | var scale = axis.computedValueRange[1] - axis.computedValueRange[0]; | |
2685 | var tick_values = []; | |
25f76ae3 DV |
2686 | for (var k = 0; k < p_ticks.length; k++) { |
2687 | var y_frac = (p_ticks[k].v - p_axis.computedValueRange[0]) / p_scale; | |
0d64e596 DV |
2688 | var y_val = axis.computedValueRange[0] + y_frac * scale; |
2689 | tick_values.push(y_val); | |
2690 | } | |
2691 | ||
48e614ac DV |
2692 | axis.ticks = ticker(axis.computedValueRange[0], |
2693 | axis.computedValueRange[1], | |
2694 | this.height_, // TODO(danvk): should be area.height | |
2695 | opts, | |
2696 | this, | |
2697 | tick_values); | |
0d64e596 | 2698 | } |
f09fc545 | 2699 | } |
f09fc545 | 2700 | }; |
25f76ae3 | 2701 | |
f09fc545 | 2702 | /** |
b1a3b195 DV |
2703 | * Extracts one series from the raw data (a 2D array) into an array of (date, |
2704 | * value) tuples. | |
2705 | * | |
2706 | * This is where undesirable points (i.e. negative values on log scales and | |
2707 | * missing values through which we wish to connect lines) are dropped. | |
0604287e | 2708 | * TODO(danvk): the "missing values" bit above doesn't seem right. |
de8f284f | 2709 | * |
b1a3b195 DV |
2710 | * @private |
2711 | */ | |
04c104d7 | 2712 | Dygraph.prototype.extractSeries_ = function(rawData, i, logScale) { |
0604287e | 2713 | // TODO(danvk): pre-allocate series here. |
b1a3b195 DV |
2714 | var series = []; |
2715 | for (var j = 0; j < rawData.length; j++) { | |
2716 | var x = rawData[j][0]; | |
2717 | var point = rawData[j][i]; | |
2718 | if (logScale) { | |
2719 | // On the log scale, points less than zero do not exist. | |
04c104d7 | 2720 | // This will create a gap in the chart. |
b1a3b195 DV |
2721 | if (point <= 0) { |
2722 | point = null; | |
2723 | } | |
b1a3b195 | 2724 | } |
04c104d7 | 2725 | series.push([x, point]); |
b1a3b195 DV |
2726 | } |
2727 | return series; | |
2728 | }; | |
2729 | ||
2730 | /** | |
629a09ae | 2731 | * @private |
6a1aa64f DV |
2732 | * Calculates the rolling average of a data set. |
2733 | * If originalData is [label, val], rolls the average of those. | |
2734 | * If originalData is [label, [, it's interpreted as [value, stddev] | |
2735 | * and the roll is returned in the same form, with appropriately reduced | |
2736 | * stddev for each value. | |
2737 | * Note that this is where fractional input (i.e. '5/10') is converted into | |
2738 | * decimal values. | |
2739 | * @param {Array} originalData The data in the appropriate format (see above) | |
6faebb69 JB |
2740 | * @param {Number} rollPeriod The number of points over which to average the |
2741 | * data | |
6a1aa64f | 2742 | */ |
285a6bda | 2743 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
6a1aa64f DV |
2744 | if (originalData.length < 2) |
2745 | return originalData; | |
758a629f | 2746 | rollPeriod = Math.min(rollPeriod, originalData.length); |
6a1aa64f | 2747 | var rollingData = []; |
285a6bda | 2748 | var sigma = this.attr_("sigma"); |
6a1aa64f | 2749 | |
758a629f | 2750 | var low, high, i, j, y, sum, num_ok, stddev; |
6a1aa64f DV |
2751 | if (this.fractions_) { |
2752 | var num = 0; | |
2753 | var den = 0; // numerator/denominator | |
2754 | var mult = 100.0; | |
758a629f | 2755 | for (i = 0; i < originalData.length; i++) { |
6a1aa64f DV |
2756 | num += originalData[i][1][0]; |
2757 | den += originalData[i][1][1]; | |
2758 | if (i - rollPeriod >= 0) { | |
2759 | num -= originalData[i - rollPeriod][1][0]; | |
2760 | den -= originalData[i - rollPeriod][1][1]; | |
2761 | } | |
2762 | ||
2763 | var date = originalData[i][0]; | |
2764 | var value = den ? num / den : 0.0; | |
285a6bda | 2765 | if (this.attr_("errorBars")) { |
395e98a3 | 2766 | if (this.attr_("wilsonInterval")) { |
6a1aa64f DV |
2767 | // For more details on this confidence interval, see: |
2768 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval | |
2769 | if (den) { | |
2770 | var p = value < 0 ? 0 : value, n = den; | |
2771 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); | |
2772 | var denom = 1 + sigma * sigma / den; | |
758a629f DV |
2773 | low = (p + sigma * sigma / (2 * den) - pm) / denom; |
2774 | high = (p + sigma * sigma / (2 * den) + pm) / denom; | |
6a1aa64f DV |
2775 | rollingData[i] = [date, |
2776 | [p * mult, (p - low) * mult, (high - p) * mult]]; | |
2777 | } else { | |
2778 | rollingData[i] = [date, [0, 0, 0]]; | |
2779 | } | |
2780 | } else { | |
758a629f | 2781 | stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; |
6a1aa64f DV |
2782 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; |
2783 | } | |
2784 | } else { | |
2785 | rollingData[i] = [date, mult * value]; | |
2786 | } | |
2787 | } | |
9922b78b | 2788 | } else if (this.attr_("customBars")) { |
758a629f | 2789 | low = 0; |
f6885d6a | 2790 | var mid = 0; |
758a629f | 2791 | high = 0; |
f6885d6a | 2792 | var count = 0; |
758a629f | 2793 | for (i = 0; i < originalData.length; i++) { |
6a1aa64f | 2794 | var data = originalData[i][1]; |
758a629f | 2795 | y = data[1]; |
6a1aa64f | 2796 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; |
f6885d6a | 2797 | |
758a629f | 2798 | if (y !== null && !isNaN(y)) { |
49a7d0d5 DV |
2799 | low += data[0]; |
2800 | mid += y; | |
2801 | high += data[2]; | |
2802 | count += 1; | |
2803 | } | |
f6885d6a DV |
2804 | if (i - rollPeriod >= 0) { |
2805 | var prev = originalData[i - rollPeriod]; | |
758a629f | 2806 | if (prev[1][1] !== null && !isNaN(prev[1][1])) { |
49a7d0d5 DV |
2807 | low -= prev[1][0]; |
2808 | mid -= prev[1][1]; | |
2809 | high -= prev[1][2]; | |
2810 | count -= 1; | |
2811 | } | |
f6885d6a | 2812 | } |
502d5996 DV |
2813 | if (count) { |
2814 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, | |
2815 | 1.0 * (mid - low) / count, | |
2816 | 1.0 * (high - mid) / count ]]; | |
2817 | } else { | |
2818 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
2819 | } | |
2769de62 | 2820 | } |
6a1aa64f DV |
2821 | } else { |
2822 | // Calculate the rolling average for the first rollPeriod - 1 points where | |
6faebb69 | 2823 | // there is not enough data to roll over the full number of points |
285a6bda | 2824 | if (!this.attr_("errorBars")){ |
5011e7a1 DV |
2825 | if (rollPeriod == 1) { |
2826 | return originalData; | |
2827 | } | |
2828 | ||
758a629f DV |
2829 | for (i = 0; i < originalData.length; i++) { |
2830 | sum = 0; | |
2831 | num_ok = 0; | |
2832 | for (j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { | |
2833 | y = originalData[j][1]; | |
2834 | if (y === null || isNaN(y)) continue; | |
5011e7a1 | 2835 | num_ok++; |
2847c1cf | 2836 | sum += originalData[j][1]; |
6a1aa64f | 2837 | } |
5011e7a1 | 2838 | if (num_ok) { |
2847c1cf | 2839 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
5011e7a1 | 2840 | } else { |
2847c1cf | 2841 | rollingData[i] = [originalData[i][0], null]; |
5011e7a1 | 2842 | } |
6a1aa64f | 2843 | } |
2847c1cf DV |
2844 | |
2845 | } else { | |
758a629f DV |
2846 | for (i = 0; i < originalData.length; i++) { |
2847 | sum = 0; | |
6a1aa64f | 2848 | var variance = 0; |
758a629f DV |
2849 | num_ok = 0; |
2850 | for (j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { | |
2851 | y = originalData[j][1][0]; | |
2852 | if (y === null || isNaN(y)) continue; | |
5011e7a1 | 2853 | num_ok++; |
6a1aa64f DV |
2854 | sum += originalData[j][1][0]; |
2855 | variance += Math.pow(originalData[j][1][1], 2); | |
2856 | } | |
5011e7a1 | 2857 | if (num_ok) { |
758a629f | 2858 | stddev = Math.sqrt(variance) / num_ok; |
5011e7a1 DV |
2859 | rollingData[i] = [originalData[i][0], |
2860 | [sum / num_ok, sigma * stddev, sigma * stddev]]; | |
2861 | } else { | |
2862 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
2863 | } | |
6a1aa64f DV |
2864 | } |
2865 | } | |
2866 | } | |
2867 | ||
2868 | return rollingData; | |
2869 | }; | |
2870 | ||
2871 | /** | |
285a6bda DV |
2872 | * Detects the type of the str (date or numeric) and sets the various |
2873 | * formatting attributes in this.attrs_ based on this type. | |
2874 | * @param {String} str An x value. | |
2875 | * @private | |
2876 | */ | |
2877 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
2878 | var isDate = false; | |
0842b24b DV |
2879 | var dashPos = str.indexOf('-'); // could be 2006-01-01 _or_ 1.0e-2 |
2880 | if ((dashPos > 0 && (str[dashPos-1] != 'e' && str[dashPos-1] != 'E')) || | |
285a6bda DV |
2881 | str.indexOf('/') >= 0 || |
2882 | isNaN(parseFloat(str))) { | |
2883 | isDate = true; | |
2884 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
2885 | // TODO(danvk): remove support for this format. | |
2886 | isDate = true; | |
2887 | } | |
2888 | ||
2889 | if (isDate) { | |
285a6bda | 2890 | this.attrs_.xValueParser = Dygraph.dateParser; |
48e614ac DV |
2891 | this.attrs_.axes.x.valueFormatter = Dygraph.dateString_; |
2892 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; | |
2893 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisFormatter; | |
285a6bda | 2894 | } else { |
c39e1d93 | 2895 | /** @private (shut up, jsdoc!) */ |
285a6bda | 2896 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
48e614ac DV |
2897 | // TODO(danvk): use Dygraph.numberValueFormatter here? |
2898 | /** @private (shut up, jsdoc!) */ | |
2899 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; | |
44462ba3 | 2900 | this.attrs_.axes.x.ticker = Dygraph.numericLinearTicks; |
48e614ac | 2901 | this.attrs_.axes.x.axisLabelFormatter = this.attrs_.axes.x.valueFormatter; |
6a1aa64f | 2902 | } |
6a1aa64f DV |
2903 | }; |
2904 | ||
2905 | /** | |
5cd7ac68 DV |
2906 | * Parses the value as a floating point number. This is like the parseFloat() |
2907 | * built-in, but with a few differences: | |
2908 | * - the empty string is parsed as null, rather than NaN. | |
2909 | * - if the string cannot be parsed at all, an error is logged. | |
2910 | * If the string can't be parsed, this method returns null. | |
2911 | * @param {String} x The string to be parsed | |
2912 | * @param {Number} opt_line_no The line number from which the string comes. | |
2913 | * @param {String} opt_line The text of the line from which the string comes. | |
2914 | * @private | |
2915 | */ | |
2916 | ||
2917 | // Parse the x as a float or return null if it's not a number. | |
2918 | Dygraph.prototype.parseFloat_ = function(x, opt_line_no, opt_line) { | |
2919 | var val = parseFloat(x); | |
2920 | if (!isNaN(val)) return val; | |
2921 | ||
2922 | // Try to figure out what happeend. | |
2923 | // If the value is the empty string, parse it as null. | |
2924 | if (/^ *$/.test(x)) return null; | |
2925 | ||
2926 | // If it was actually "NaN", return it as NaN. | |
2927 | if (/^ *nan *$/i.test(x)) return NaN; | |
2928 | ||
2929 | // Looks like a parsing error. | |
2930 | var msg = "Unable to parse '" + x + "' as a number"; | |
2931 | if (opt_line !== null && opt_line_no !== null) { | |
2932 | msg += " on line " + (1+opt_line_no) + " ('" + opt_line + "') of CSV."; | |
2933 | } | |
2934 | this.error(msg); | |
2935 | ||
2936 | return null; | |
2937 | }; | |
2938 | ||
2939 | /** | |
629a09ae | 2940 | * @private |
6a1aa64f DV |
2941 | * Parses a string in a special csv format. We expect a csv file where each |
2942 | * line is a date point, and the first field in each line is the date string. | |
2943 | * We also expect that all remaining fields represent series. | |
285a6bda | 2944 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f | 2945 | * date, series1, stddev1, series2, stddev2, ... |
629a09ae | 2946 | * @param {[Object]} data See above. |
285a6bda | 2947 | * |
629a09ae | 2948 | * @return [Object] An array with one entry for each row. These entries |
285a6bda DV |
2949 | * are an array of cells in that row. The first entry is the parsed x-value for |
2950 | * the row. The second, third, etc. are the y-values. These can take on one of | |
2951 | * three forms, depending on the CSV and constructor parameters: | |
2952 | * 1. numeric value | |
2953 | * 2. [ value, stddev ] | |
2954 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 2955 | */ |
285a6bda | 2956 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f | 2957 | var ret = []; |
e5763589 DV |
2958 | var line_delimiter = Dygraph.detectLineDelimiter(data); |
2959 | var lines = data.split(line_delimiter || "\n"); | |
758a629f | 2960 | var vals, j; |
3d67f03b DV |
2961 | |
2962 | // Use the default delimiter or fall back to a tab if that makes sense. | |
2963 | var delim = this.attr_('delimiter'); | |
2964 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { | |
2965 | delim = '\t'; | |
2966 | } | |
2967 | ||
285a6bda | 2968 | var start = 0; |
d7beab6b DV |
2969 | if (!('labels' in this.user_attrs_)) { |
2970 | // User hasn't explicitly set labels, so they're (presumably) in the CSV. | |
285a6bda | 2971 | start = 1; |
d7beab6b | 2972 | this.attrs_.labels = lines[0].split(delim); // NOTE: _not_ user_attrs_. |
34825ef5 | 2973 | this.attributes_.reparseSeries(); |
6a1aa64f | 2974 | } |
5cd7ac68 | 2975 | var line_no = 0; |
03b522a4 | 2976 | |
285a6bda DV |
2977 | var xParser; |
2978 | var defaultParserSet = false; // attempt to auto-detect x value type | |
2979 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 2980 | var outOfOrder = false; |
6a1aa64f DV |
2981 | for (var i = start; i < lines.length; i++) { |
2982 | var line = lines[i]; | |
5cd7ac68 | 2983 | line_no = i; |
758a629f | 2984 | if (line.length === 0) continue; // skip blank lines |
3d67f03b DV |
2985 | if (line[0] == '#') continue; // skip comment lines |
2986 | var inFields = line.split(delim); | |
285a6bda | 2987 | if (inFields.length < 2) continue; |
6a1aa64f DV |
2988 | |
2989 | var fields = []; | |
285a6bda DV |
2990 | if (!defaultParserSet) { |
2991 | this.detectTypeFromString_(inFields[0]); | |
2992 | xParser = this.attr_("xValueParser"); | |
2993 | defaultParserSet = true; | |
2994 | } | |
2995 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
2996 | |
2997 | // If fractions are expected, parse the numbers as "A/B" | |
2998 | if (this.fractions_) { | |
758a629f | 2999 | for (j = 1; j < inFields.length; j++) { |
6a1aa64f | 3000 | // TODO(danvk): figure out an appropriate way to flag parse errors. |
758a629f | 3001 | vals = inFields[j].split("/"); |
7219edb3 DV |
3002 | if (vals.length != 2) { |
3003 | this.error('Expected fractional "num/den" values in CSV data ' + | |
3004 | "but found a value '" + inFields[j] + "' on line " + | |
3005 | (1 + i) + " ('" + line + "') which is not of this form."); | |
3006 | fields[j] = [0, 0]; | |
3007 | } else { | |
3008 | fields[j] = [this.parseFloat_(vals[0], i, line), | |
3009 | this.parseFloat_(vals[1], i, line)]; | |
3010 | } | |
6a1aa64f | 3011 | } |
285a6bda | 3012 | } else if (this.attr_("errorBars")) { |
6a1aa64f | 3013 | // If there are error bars, values are (value, stddev) pairs |
7219edb3 DV |
3014 | if (inFields.length % 2 != 1) { |
3015 | this.error('Expected alternating (value, stdev.) pairs in CSV data ' + | |
3016 | 'but line ' + (1 + i) + ' has an odd number of values (' + | |
3017 | (inFields.length - 1) + "): '" + line + "'"); | |
3018 | } | |
758a629f | 3019 | for (j = 1; j < inFields.length; j += 2) { |
5cd7ac68 DV |
3020 | fields[(j + 1) / 2] = [this.parseFloat_(inFields[j], i, line), |
3021 | this.parseFloat_(inFields[j + 1], i, line)]; | |
7219edb3 | 3022 | } |
9922b78b | 3023 | } else if (this.attr_("customBars")) { |
6a1aa64f | 3024 | // Bars are a low;center;high tuple |
758a629f | 3025 | for (j = 1; j < inFields.length; j++) { |
327a9279 DV |
3026 | var val = inFields[j]; |
3027 | if (/^ *$/.test(val)) { | |
3028 | fields[j] = [null, null, null]; | |
3029 | } else { | |
758a629f | 3030 | vals = val.split(";"); |
327a9279 DV |
3031 | if (vals.length == 3) { |
3032 | fields[j] = [ this.parseFloat_(vals[0], i, line), | |
3033 | this.parseFloat_(vals[1], i, line), | |
3034 | this.parseFloat_(vals[2], i, line) ]; | |
3035 | } else { | |
1a5dc2af RK |
3036 | this.warn('When using customBars, values must be either blank ' + |
3037 | 'or "low;center;high" tuples (got "' + val + | |
3038 | '" on line ' + (1+i)); | |
327a9279 DV |
3039 | } |
3040 | } | |
6a1aa64f DV |
3041 | } |
3042 | } else { | |
3043 | // Values are just numbers | |
758a629f | 3044 | for (j = 1; j < inFields.length; j++) { |
5cd7ac68 | 3045 | fields[j] = this.parseFloat_(inFields[j], i, line); |
285a6bda | 3046 | } |
6a1aa64f | 3047 | } |
987840a2 DV |
3048 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
3049 | outOfOrder = true; | |
3050 | } | |
285a6bda DV |
3051 | |
3052 | if (fields.length != expectedCols) { | |
3053 | this.error("Number of columns in line " + i + " (" + fields.length + | |
3054 | ") does not agree with number of labels (" + expectedCols + | |
3055 | ") " + line); | |
3056 | } | |
6d0aaa09 DV |
3057 | |
3058 | // If the user specified the 'labels' option and none of the cells of the | |
3059 | // first row parsed correctly, then they probably double-specified the | |
3060 | // labels. We go with the values set in the option, discard this row and | |
3061 | // log a warning to the JS console. | |
758a629f | 3062 | if (i === 0 && this.attr_('labels')) { |
6d0aaa09 | 3063 | var all_null = true; |
758a629f | 3064 | for (j = 0; all_null && j < fields.length; j++) { |
6d0aaa09 DV |
3065 | if (fields[j]) all_null = false; |
3066 | } | |
3067 | if (all_null) { | |
3068 | this.warn("The dygraphs 'labels' option is set, but the first row of " + | |
3069 | "CSV data ('" + line + "') appears to also contain labels. " + | |
3070 | "Will drop the CSV labels and use the option labels."); | |
3071 | continue; | |
3072 | } | |
3073 | } | |
3074 | ret.push(fields); | |
6a1aa64f | 3075 | } |
987840a2 DV |
3076 | |
3077 | if (outOfOrder) { | |
3078 | this.warn("CSV is out of order; order it correctly to speed loading."); | |
758a629f | 3079 | ret.sort(function(a,b) { return a[0] - b[0]; }); |
987840a2 DV |
3080 | } |
3081 | ||
6a1aa64f DV |
3082 | return ret; |
3083 | }; | |
3084 | ||
3085 | /** | |
629a09ae | 3086 | * @private |
285a6bda DV |
3087 | * The user has provided their data as a pre-packaged JS array. If the x values |
3088 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
3089 | * are dates, we need to convert them from Date objects to ms since epoch. | |
629a09ae DV |
3090 | * @param {[Object]} data |
3091 | * @return {[Object]} data with numeric x values. | |
285a6bda DV |
3092 | */ |
3093 | Dygraph.prototype.parseArray_ = function(data) { | |
3094 | // Peek at the first x value to see if it's numeric. | |
758a629f | 3095 | if (data.length === 0) { |
285a6bda DV |
3096 | this.error("Can't plot empty data set"); |
3097 | return null; | |
3098 | } | |
758a629f | 3099 | if (data[0].length === 0) { |
285a6bda DV |
3100 | this.error("Data set cannot contain an empty row"); |
3101 | return null; | |
3102 | } | |
3103 | ||
758a629f DV |
3104 | var i; |
3105 | if (this.attr_("labels") === null) { | |
285a6bda DV |
3106 | this.warn("Using default labels. Set labels explicitly via 'labels' " + |
3107 | "in the options parameter"); | |
3108 | this.attrs_.labels = [ "X" ]; | |
758a629f | 3109 | for (i = 1; i < data[0].length; i++) { |
77812e0e | 3110 | this.attrs_.labels.push("Y" + i); // Not user_attrs_. |
285a6bda | 3111 | } |
77812e0e | 3112 | this.attributes_.reparseSeries(); |
debdb88d DV |
3113 | } else { |
3114 | var num_labels = this.attr_("labels"); | |
3115 | if (num_labels.length != data[0].length) { | |
3116 | this.error("Mismatch between number of labels (" + num_labels + | |
3117 | ") and number of columns in array (" + data[0].length + ")"); | |
3118 | return null; | |
3119 | } | |
285a6bda DV |
3120 | } |
3121 | ||
2dda3850 | 3122 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda | 3123 | // Some intelligent defaults for a date x-axis. |
48e614ac DV |
3124 | this.attrs_.axes.x.valueFormatter = Dygraph.dateString_; |
3125 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisFormatter; | |
3126 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; | |
285a6bda DV |
3127 | |
3128 | // Assume they're all dates. | |
e3ab7b40 | 3129 | var parsedData = Dygraph.clone(data); |
758a629f DV |
3130 | for (i = 0; i < data.length; i++) { |
3131 | if (parsedData[i].length === 0) { | |
a323ff4a | 3132 | this.error("Row " + (1 + i) + " of data is empty"); |
285a6bda DV |
3133 | return null; |
3134 | } | |
758a629f DV |
3135 | if (parsedData[i][0] === null || |
3136 | typeof(parsedData[i][0].getTime) != 'function' || | |
3137 | isNaN(parsedData[i][0].getTime())) { | |
be96a1f5 | 3138 | this.error("x value in row " + (1 + i) + " is not a Date"); |
285a6bda DV |
3139 | return null; |
3140 | } | |
3141 | parsedData[i][0] = parsedData[i][0].getTime(); | |
3142 | } | |
3143 | return parsedData; | |
3144 | } else { | |
3145 | // Some intelligent defaults for a numeric x-axis. | |
c39e1d93 | 3146 | /** @private (shut up, jsdoc!) */ |
48e614ac DV |
3147 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; |
3148 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.numberAxisLabelFormatter; | |
44462ba3 | 3149 | this.attrs_.axes.x.ticker = Dygraph.numericLinearTicks; |
285a6bda DV |
3150 | return data; |
3151 | } | |
3152 | }; | |
3153 | ||
3154 | /** | |
79420a1e DV |
3155 | * Parses a DataTable object from gviz. |
3156 | * The data is expected to have a first column that is either a date or a | |
3157 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
3158 | * between this.xValueParser_ and the type of the first column, it will be | |
a685723c | 3159 | * fixed. Fills out rawData_. |
629a09ae | 3160 | * @param {[Object]} data See above. |
79420a1e DV |
3161 | * @private |
3162 | */ | |
285a6bda | 3163 | Dygraph.prototype.parseDataTable_ = function(data) { |
5829af3d | 3164 | var shortTextForAnnotationNum = function(num) { |
3165 | // converts [0-9]+ [A-Z][a-z]* | |
3166 | // example: 0=A, 1=B, 25=Z, 26=Aa, 27=Ab | |
3167 | // and continues like.. Ba Bb .. Za .. Zz..Aaa...Zzz Aaaa Zzzz | |
3168 | var shortText = String.fromCharCode(65 /* A */ + num % 26); | |
3169 | num = Math.floor(num / 26); | |
3170 | while ( num > 0 ) { | |
3171 | shortText = String.fromCharCode(65 /* A */ + (num - 1) % 26 ) + shortText.toLowerCase(); | |
3172 | num = Math.floor((num - 1) / 26); | |
3173 | } | |
3174 | return shortText; | |
42a9ebb8 | 3175 | }; |
5829af3d | 3176 | |
79420a1e DV |
3177 | var cols = data.getNumberOfColumns(); |
3178 | var rows = data.getNumberOfRows(); | |
3179 | ||
d955e223 | 3180 | var indepType = data.getColumnType(0); |
4440f6c8 | 3181 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda | 3182 | this.attrs_.xValueParser = Dygraph.dateParser; |
48e614ac DV |
3183 | this.attrs_.axes.x.valueFormatter = Dygraph.dateString_; |
3184 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; | |
3185 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisFormatter; | |
33127159 | 3186 | } else if (indepType == 'number') { |
285a6bda | 3187 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
48e614ac | 3188 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; |
44462ba3 | 3189 | this.attrs_.axes.x.ticker = Dygraph.numericLinearTicks; |
48e614ac | 3190 | this.attrs_.axes.x.axisLabelFormatter = this.attrs_.axes.x.valueFormatter; |
285a6bda | 3191 | } else { |
987840a2 DV |
3192 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
3193 | "column 1 of DataTable input (Got '" + indepType + "')"); | |
79420a1e DV |
3194 | return null; |
3195 | } | |
3196 | ||
a685723c DV |
3197 | // Array of the column indices which contain data (and not annotations). |
3198 | var colIdx = []; | |
3199 | var annotationCols = {}; // data index -> [annotation cols] | |
3200 | var hasAnnotations = false; | |
758a629f DV |
3201 | var i, j; |
3202 | for (i = 1; i < cols; i++) { | |
a685723c DV |
3203 | var type = data.getColumnType(i); |
3204 | if (type == 'number') { | |
3205 | colIdx.push(i); | |
3206 | } else if (type == 'string' && this.attr_('displayAnnotations')) { | |
3207 | // This is OK -- it's an annotation column. | |
3208 | var dataIdx = colIdx[colIdx.length - 1]; | |
3209 | if (!annotationCols.hasOwnProperty(dataIdx)) { | |
3210 | annotationCols[dataIdx] = [i]; | |
3211 | } else { | |
3212 | annotationCols[dataIdx].push(i); | |
3213 | } | |
3214 | hasAnnotations = true; | |
3215 | } else { | |
3216 | this.error("Only 'number' is supported as a dependent type with Gviz." + | |
3217 | " 'string' is only supported if displayAnnotations is true"); | |
3218 | } | |
3219 | } | |
3220 | ||
3221 | // Read column labels | |
3222 | // TODO(danvk): add support back for errorBars | |
3223 | var labels = [data.getColumnLabel(0)]; | |
758a629f | 3224 | for (i = 0; i < colIdx.length; i++) { |
a685723c | 3225 | labels.push(data.getColumnLabel(colIdx[i])); |
f9348814 | 3226 | if (this.attr_("errorBars")) i += 1; |
a685723c DV |
3227 | } |
3228 | this.attrs_.labels = labels; | |
3229 | cols = labels.length; | |
3230 | ||
79420a1e | 3231 | var ret = []; |
987840a2 | 3232 | var outOfOrder = false; |
a685723c | 3233 | var annotations = []; |
758a629f | 3234 | for (i = 0; i < rows; i++) { |
79420a1e | 3235 | var row = []; |
debe4434 DV |
3236 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
3237 | data.getValue(i, 0) === null) { | |
129569a5 FD |
3238 | this.warn("Ignoring row " + i + |
3239 | " of DataTable because of undefined or null first column."); | |
debe4434 DV |
3240 | continue; |
3241 | } | |
3242 | ||
c21d2c2d | 3243 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
3244 | row.push(data.getValue(i, 0).getTime()); |
3245 | } else { | |
3246 | row.push(data.getValue(i, 0)); | |
3247 | } | |
3e3f84e4 | 3248 | if (!this.attr_("errorBars")) { |
758a629f | 3249 | for (j = 0; j < colIdx.length; j++) { |
a685723c DV |
3250 | var col = colIdx[j]; |
3251 | row.push(data.getValue(i, col)); | |
3252 | if (hasAnnotations && | |
3253 | annotationCols.hasOwnProperty(col) && | |
758a629f | 3254 | data.getValue(i, annotationCols[col][0]) !== null) { |
a685723c DV |
3255 | var ann = {}; |
3256 | ann.series = data.getColumnLabel(col); | |
3257 | ann.xval = row[0]; | |
5829af3d | 3258 | ann.shortText = shortTextForAnnotationNum(annotations.length); |
a685723c DV |
3259 | ann.text = ''; |
3260 | for (var k = 0; k < annotationCols[col].length; k++) { | |
3261 | if (k) ann.text += "\n"; | |
3262 | ann.text += data.getValue(i, annotationCols[col][k]); | |
3263 | } | |
3264 | annotations.push(ann); | |
3265 | } | |
3e3f84e4 | 3266 | } |
92fd68d8 DV |
3267 | |
3268 | // Strip out infinities, which give dygraphs problems later on. | |
758a629f | 3269 | for (j = 0; j < row.length; j++) { |
92fd68d8 DV |
3270 | if (!isFinite(row[j])) row[j] = null; |
3271 | } | |
3e3f84e4 | 3272 | } else { |
758a629f | 3273 | for (j = 0; j < cols - 1; j++) { |
3e3f84e4 DV |
3274 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); |
3275 | } | |
79420a1e | 3276 | } |
987840a2 DV |
3277 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
3278 | outOfOrder = true; | |
3279 | } | |
243d96e8 | 3280 | ret.push(row); |
79420a1e | 3281 | } |
987840a2 DV |
3282 | |
3283 | if (outOfOrder) { | |
3284 | this.warn("DataTable is out of order; order it correctly to speed loading."); | |
758a629f | 3285 | ret.sort(function(a,b) { return a[0] - b[0]; }); |
987840a2 | 3286 | } |
a685723c DV |
3287 | this.rawData_ = ret; |
3288 | ||
3289 | if (annotations.length > 0) { | |
3290 | this.setAnnotations(annotations, true); | |
3291 | } | |
758a629f | 3292 | }; |
79420a1e | 3293 | |
629a09ae | 3294 | /** |
6a1aa64f DV |
3295 | * Get the CSV data. If it's in a function, call that function. If it's in a |
3296 | * file, do an XMLHttpRequest to get it. | |
3297 | * @private | |
3298 | */ | |
285a6bda | 3299 | Dygraph.prototype.start_ = function() { |
36d4fabf RK |
3300 | var data = this.file_; |
3301 | ||
3302 | // Functions can return references of all other types. | |
3303 | if (typeof data == 'function') { | |
3304 | data = data(); | |
3305 | } | |
3306 | ||
3307 | if (Dygraph.isArrayLike(data)) { | |
3308 | this.rawData_ = this.parseArray_(data); | |
26ca7938 | 3309 | this.predraw_(); |
36d4fabf RK |
3310 | } else if (typeof data == 'object' && |
3311 | typeof data.getColumnRange == 'function') { | |
79420a1e | 3312 | // must be a DataTable from gviz. |
36d4fabf | 3313 | this.parseDataTable_(data); |
26ca7938 | 3314 | this.predraw_(); |
36d4fabf | 3315 | } else if (typeof data == 'string') { |
285a6bda | 3316 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. |
e5763589 DV |
3317 | var line_delimiter = Dygraph.detectLineDelimiter(data); |
3318 | if (line_delimiter) { | |
36d4fabf | 3319 | this.loadedEvent_(data); |
285a6bda DV |
3320 | } else { |
3321 | var req = new XMLHttpRequest(); | |
3322 | var caller = this; | |
3323 | req.onreadystatechange = function () { | |
3324 | if (req.readyState == 4) { | |
758a629f DV |
3325 | if (req.status === 200 || // Normal http |
3326 | req.status === 0) { // Chrome w/ --allow-file-access-from-files | |
285a6bda DV |
3327 | caller.loadedEvent_(req.responseText); |
3328 | } | |
6a1aa64f | 3329 | } |
285a6bda | 3330 | }; |
6a1aa64f | 3331 | |
36d4fabf | 3332 | req.open("GET", data, true); |
285a6bda DV |
3333 | req.send(null); |
3334 | } | |
3335 | } else { | |
36d4fabf | 3336 | this.error("Unknown data format: " + (typeof data)); |
6a1aa64f DV |
3337 | } |
3338 | }; | |
3339 | ||
3340 | /** | |
3341 | * Changes various properties of the graph. These can include: | |
3342 | * <ul> | |
3343 | * <li>file: changes the source data for the graph</li> | |
3344 | * <li>errorBars: changes whether the data contains stddev</li> | |
3345 | * </ul> | |
dcb25130 | 3346 | * |
ccfcc169 DV |
3347 | * There's a huge variety of options that can be passed to this method. For a |
3348 | * full list, see http://dygraphs.com/options.html. | |
3349 | * | |
6a1aa64f | 3350 | * @param {Object} attrs The new properties and values |
ccfcc169 DV |
3351 | * @param {Boolean} [block_redraw] Usually the chart is redrawn after every |
3352 | * call to updateOptions(). If you know better, you can pass true to explicitly | |
3353 | * block the redraw. This can be useful for chaining updateOptions() calls, | |
3354 | * avoiding the occasional infinite loop and preventing redraws when it's not | |
3355 | * necessary (e.g. when updating a callback). | |
6a1aa64f | 3356 | */ |
48e614ac | 3357 | Dygraph.prototype.updateOptions = function(input_attrs, block_redraw) { |
ccfcc169 DV |
3358 | if (typeof(block_redraw) == 'undefined') block_redraw = false; |
3359 | ||
48e614ac | 3360 | // mapLegacyOptions_ drops the "file" parameter as a convenience to us. |
758a629f | 3361 | var file = input_attrs.file; |
48e614ac DV |
3362 | var attrs = Dygraph.mapLegacyOptions_(input_attrs); |
3363 | ||
ccfcc169 | 3364 | // TODO(danvk): this is a mess. Move these options into attr_. |
c65f2303 | 3365 | if ('rollPeriod' in attrs) { |
6a1aa64f DV |
3366 | this.rollPeriod_ = attrs.rollPeriod; |
3367 | } | |
c65f2303 | 3368 | if ('dateWindow' in attrs) { |
6a1aa64f | 3369 | this.dateWindow_ = attrs.dateWindow; |
e5152598 | 3370 | if (!('isZoomedIgnoreProgrammaticZoom' in attrs)) { |
758a629f | 3371 | this.zoomed_x_ = (attrs.dateWindow !== null); |
81856f70 | 3372 | } |
b7e5862d | 3373 | } |
e5152598 | 3374 | if ('valueRange' in attrs && !('isZoomedIgnoreProgrammaticZoom' in attrs)) { |
758a629f | 3375 | this.zoomed_y_ = (attrs.valueRange !== null); |
6a1aa64f | 3376 | } |
450fe64b DV |
3377 | |
3378 | // TODO(danvk): validate per-series options. | |
46dde5f9 DV |
3379 | // Supported: |
3380 | // strokeWidth | |
3381 | // pointSize | |
3382 | // drawPoints | |
3383 | // highlightCircleSize | |
450fe64b | 3384 | |
9ca829f2 DV |
3385 | // Check if this set options will require new points. |
3386 | var requiresNewPoints = Dygraph.isPixelChangingOptionList(this.attr_("labels"), attrs); | |
3387 | ||
48e614ac | 3388 | Dygraph.updateDeep(this.user_attrs_, attrs); |
285a6bda | 3389 | |
b635457c RK |
3390 | this.attributes_.reparseSeries(); |
3391 | ||
48e614ac DV |
3392 | if (file) { |
3393 | this.file_ = file; | |
ccfcc169 | 3394 | if (!block_redraw) this.start_(); |
6a1aa64f | 3395 | } else { |
9ca829f2 DV |
3396 | if (!block_redraw) { |
3397 | if (requiresNewPoints) { | |
48e614ac | 3398 | this.predraw_(); |
9ca829f2 | 3399 | } else { |
e2c21500 | 3400 | this.renderGraph_(false); |
9ca829f2 DV |
3401 | } |
3402 | } | |
6a1aa64f DV |
3403 | } |
3404 | }; | |
3405 | ||
3406 | /** | |
48e614ac DV |
3407 | * Returns a copy of the options with deprecated names converted into current |
3408 | * names. Also drops the (potentially-large) 'file' attribute. If the caller is | |
3409 | * interested in that, they should save a copy before calling this. | |
3410 | * @private | |
3411 | */ | |
3412 | Dygraph.mapLegacyOptions_ = function(attrs) { | |
3413 | var my_attrs = {}; | |
3414 | for (var k in attrs) { | |
3415 | if (k == 'file') continue; | |
3416 | if (attrs.hasOwnProperty(k)) my_attrs[k] = attrs[k]; | |
3417 | } | |
3418 | ||
3419 | var set = function(axis, opt, value) { | |
3420 | if (!my_attrs.axes) my_attrs.axes = {}; | |
3421 | if (!my_attrs.axes[axis]) my_attrs.axes[axis] = {}; | |
3422 | my_attrs.axes[axis][opt] = value; | |
3423 | }; | |
3424 | var map = function(opt, axis, new_opt) { | |
3425 | if (typeof(attrs[opt]) != 'undefined') { | |
3426 | set(axis, new_opt, attrs[opt]); | |
3427 | delete my_attrs[opt]; | |
3428 | } | |
3429 | }; | |
3430 | ||
3431 | // This maps, e.g., xValueFormater -> axes: { x: { valueFormatter: ... } } | |
3432 | map('xValueFormatter', 'x', 'valueFormatter'); | |
3433 | map('pixelsPerXLabel', 'x', 'pixelsPerLabel'); | |
3434 | map('xAxisLabelFormatter', 'x', 'axisLabelFormatter'); | |
3435 | map('xTicker', 'x', 'ticker'); | |
3436 | map('yValueFormatter', 'y', 'valueFormatter'); | |
3437 | map('pixelsPerYLabel', 'y', 'pixelsPerLabel'); | |
3438 | map('yAxisLabelFormatter', 'y', 'axisLabelFormatter'); | |
3439 | map('yTicker', 'y', 'ticker'); | |
3440 | return my_attrs; | |
3441 | }; | |
3442 | ||
3443 | /** | |
697e70b2 DV |
3444 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
3445 | * containing div (which has presumably changed size since the dygraph was | |
3446 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
3447 | * |
3448 | * This is far more efficient than destroying and re-instantiating a | |
3449 | * Dygraph, since it doesn't have to reparse the underlying data. | |
3450 | * | |
629a09ae DV |
3451 | * @param {Number} [width] Width (in pixels) |
3452 | * @param {Number} [height] Height (in pixels) | |
697e70b2 DV |
3453 | */ |
3454 | Dygraph.prototype.resize = function(width, height) { | |
e8c7ef86 DV |
3455 | if (this.resize_lock) { |
3456 | return; | |
3457 | } | |
3458 | this.resize_lock = true; | |
3459 | ||
697e70b2 DV |
3460 | if ((width === null) != (height === null)) { |
3461 | this.warn("Dygraph.resize() should be called with zero parameters or " + | |
3462 | "two non-NULL parameters. Pretending it was zero."); | |
3463 | width = height = null; | |
3464 | } | |
3465 | ||
4b4d1a63 DV |
3466 | var old_width = this.width_; |
3467 | var old_height = this.height_; | |
b16e6369 | 3468 | |
697e70b2 DV |
3469 | if (width) { |
3470 | this.maindiv_.style.width = width + "px"; | |
3471 | this.maindiv_.style.height = height + "px"; | |
3472 | this.width_ = width; | |
3473 | this.height_ = height; | |
3474 | } else { | |
ccd9d7c2 PF |
3475 | this.width_ = this.maindiv_.clientWidth; |
3476 | this.height_ = this.maindiv_.clientHeight; | |
697e70b2 DV |
3477 | } |
3478 | ||
4b4d1a63 DV |
3479 | if (old_width != this.width_ || old_height != this.height_) { |
3480 | // TODO(danvk): there should be a clear() method. | |
3481 | this.maindiv_.innerHTML = ""; | |
77b5e09d | 3482 | this.roller_ = null; |
4b4d1a63 DV |
3483 | this.attrs_.labelsDiv = null; |
3484 | this.createInterface_(); | |
c9faeafd DV |
3485 | if (this.annotations_.length) { |
3486 | // createInterface_ reset the layout, so we need to do this. | |
3487 | this.layout_.setAnnotations(this.annotations_); | |
3488 | } | |
4b4d1a63 DV |
3489 | this.predraw_(); |
3490 | } | |
e8c7ef86 DV |
3491 | |
3492 | this.resize_lock = false; | |
697e70b2 DV |
3493 | }; |
3494 | ||
3495 | /** | |
6faebb69 | 3496 | * Adjusts the number of points in the rolling average. Updates the graph to |
6a1aa64f | 3497 | * reflect the new averaging period. |
6faebb69 | 3498 | * @param {Number} length Number of points over which to average the data. |
6a1aa64f | 3499 | */ |
285a6bda | 3500 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f | 3501 | this.rollPeriod_ = length; |
26ca7938 | 3502 | this.predraw_(); |
6a1aa64f | 3503 | }; |
540d00f1 | 3504 | |
f8cfec73 | 3505 | /** |
1cf11047 DV |
3506 | * Returns a boolean array of visibility statuses. |
3507 | */ | |
3508 | Dygraph.prototype.visibility = function() { | |
3509 | // Do lazy-initialization, so that this happens after we know the number of | |
3510 | // data series. | |
3511 | if (!this.attr_("visibility")) { | |
758a629f | 3512 | this.attrs_.visibility = []; |
1cf11047 | 3513 | } |
758a629f | 3514 | // TODO(danvk): it looks like this could go into an infinite loop w/ user_attrs. |
395e98a3 | 3515 | while (this.attr_("visibility").length < this.numColumns() - 1) { |
758a629f | 3516 | this.attrs_.visibility.push(true); |
1cf11047 DV |
3517 | } |
3518 | return this.attr_("visibility"); | |
3519 | }; | |
3520 | ||
3521 | /** | |
3522 | * Changes the visiblity of a series. | |
3523 | */ | |
3524 | Dygraph.prototype.setVisibility = function(num, value) { | |
3525 | var x = this.visibility(); | |
a6c109c1 | 3526 | if (num < 0 || num >= x.length) { |
1cf11047 DV |
3527 | this.warn("invalid series number in setVisibility: " + num); |
3528 | } else { | |
3529 | x[num] = value; | |
26ca7938 | 3530 | this.predraw_(); |
1cf11047 DV |
3531 | } |
3532 | }; | |
3533 | ||
3534 | /** | |
0cb9bd91 DV |
3535 | * How large of an area will the dygraph render itself in? |
3536 | * This is used for testing. | |
3537 | * @return A {width: w, height: h} object. | |
3538 | * @private | |
3539 | */ | |
3540 | Dygraph.prototype.size = function() { | |
3541 | return { width: this.width_, height: this.height_ }; | |
3542 | }; | |
3543 | ||
3544 | /** | |
5c528fa2 | 3545 | * Update the list of annotations and redraw the chart. |
41ee764f DV |
3546 | * See dygraphs.com/annotations.html for more info on how to use annotations. |
3547 | * @param ann {Array} An array of annotation objects. | |
3548 | * @param suppressDraw {Boolean} Set to "true" to block chart redraw (optional). | |
5c528fa2 | 3549 | */ |
a685723c | 3550 | Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { |
3c51ab74 DV |
3551 | // Only add the annotation CSS rule once we know it will be used. |
3552 | Dygraph.addAnnotationRule(); | |
5c528fa2 DV |
3553 | this.annotations_ = ann; |
3554 | this.layout_.setAnnotations(this.annotations_); | |
a685723c | 3555 | if (!suppressDraw) { |
26ca7938 | 3556 | this.predraw_(); |
a685723c | 3557 | } |
5c528fa2 DV |
3558 | }; |
3559 | ||
3560 | /** | |
3561 | * Return the list of annotations. | |
3562 | */ | |
3563 | Dygraph.prototype.annotations = function() { | |
3564 | return this.annotations_; | |
3565 | }; | |
3566 | ||
46dde5f9 | 3567 | /** |
82c6fe4d KW |
3568 | * Get the list of label names for this graph. The first column is the |
3569 | * x-axis, so the data series names start at index 1. | |
3570 | */ | |
e2c21500 | 3571 | Dygraph.prototype.getLabels = function() { |
82c6fe4d KW |
3572 | return this.attr_("labels").slice(); |
3573 | }; | |
3574 | ||
3575 | /** | |
46dde5f9 DV |
3576 | * Get the index of a series (column) given its name. The first column is the |
3577 | * x-axis, so the data series start with index 1. | |
3578 | */ | |
3579 | Dygraph.prototype.indexFromSetName = function(name) { | |
82c6fe4d | 3580 | return this.setIndexByName_[name]; |
46dde5f9 DV |
3581 | }; |
3582 | ||
629a09ae | 3583 | /** |
857a6931 KW |
3584 | * Get the internal dataset index given its name. These are numbered starting from 0, |
3585 | * and only count visible sets. | |
3586 | * @private | |
3587 | */ | |
3588 | Dygraph.prototype.datasetIndexFromSetName_ = function(name) { | |
3589 | return this.datasetIndex_[this.indexFromSetName(name)]; | |
3590 | }; | |
3591 | ||
3592 | /** | |
629a09ae DV |
3593 | * @private |
3594 | * Adds a default style for the annotation CSS classes to the document. This is | |
3595 | * only executed when annotations are actually used. It is designed to only be | |
3596 | * called once -- all calls after the first will return immediately. | |
3597 | */ | |
5c528fa2 | 3598 | Dygraph.addAnnotationRule = function() { |
d38c6191 | 3599 | // TODO(danvk): move this function into plugins/annotations.js? |
5c528fa2 DV |
3600 | if (Dygraph.addedAnnotationCSS) return; |
3601 | ||
5c528fa2 DV |
3602 | var rule = "border: 1px solid black; " + |
3603 | "background-color: white; " + | |
3604 | "text-align: center;"; | |
22186871 DV |
3605 | |
3606 | var styleSheetElement = document.createElement("style"); | |
3607 | styleSheetElement.type = "text/css"; | |
3608 | document.getElementsByTagName("head")[0].appendChild(styleSheetElement); | |
3609 | ||
3610 | // Find the first style sheet that we can access. | |
3611 | // We may not add a rule to a style sheet from another domain for security | |
3612 | // reasons. This sometimes comes up when using gviz, since the Google gviz JS | |
3613 | // adds its own style sheets from google.com. | |
3614 | for (var i = 0; i < document.styleSheets.length; i++) { | |
3615 | if (document.styleSheets[i].disabled) continue; | |
3616 | var mysheet = document.styleSheets[i]; | |
3617 | try { | |
3618 | if (mysheet.insertRule) { // Firefox | |
3619 | var idx = mysheet.cssRules ? mysheet.cssRules.length : 0; | |
3620 | mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", idx); | |
3621 | } else if (mysheet.addRule) { // IE | |
3622 | mysheet.addRule(".dygraphDefaultAnnotation", rule); | |
3623 | } | |
3624 | Dygraph.addedAnnotationCSS = true; | |
3625 | return; | |
3626 | } catch(err) { | |
3627 | // Was likely a security exception. | |
3628 | } | |
5c528fa2 DV |
3629 | } |
3630 | ||
22186871 | 3631 | this.warn("Unable to add default annotation CSS rule; display may be off."); |
758a629f | 3632 | }; |
5c528fa2 | 3633 | |
285a6bda | 3634 | // Older pages may still use this name. |
c0f54d4f | 3635 | var DateGraph = Dygraph; |