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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 | ||
183 | ||
8e4a6af3 | 184 | // Default attribute values. |
285a6bda | 185 | Dygraph.DEFAULT_ATTRS = { |
a9fc39ab | 186 | highlightCircleSize: 3, |
857a6931 | 187 | highlightSeriesOpts: null, |
afdb20d8 | 188 | highlightSeriesBackgroundAlpha: 0.5, |
285a6bda | 189 | |
8e4a6af3 DV |
190 | labelsDivWidth: 250, |
191 | labelsDivStyles: { | |
192 | // TODO(danvk): move defaults from createStatusMessage_ here. | |
285a6bda DV |
193 | }, |
194 | labelsSeparateLines: false, | |
bcd3ebf0 | 195 | labelsShowZeroValues: true, |
285a6bda | 196 | labelsKMB: false, |
afefbcdb | 197 | labelsKMG2: false, |
d160cc3b | 198 | showLabelsOnHighlight: true, |
12e4c741 | 199 | |
2e1fcf1a DV |
200 | digitsAfterDecimal: 2, |
201 | maxNumberWidth: 6, | |
19589a3e | 202 | sigFigs: null, |
285a6bda DV |
203 | |
204 | strokeWidth: 1.0, | |
857a6931 KW |
205 | strokeBorderWidth: 0, |
206 | strokeBorderColor: "white", | |
8e4a6af3 | 207 | |
8846615a DV |
208 | axisTickSize: 3, |
209 | axisLabelFontSize: 14, | |
210 | xAxisLabelWidth: 50, | |
211 | yAxisLabelWidth: 50, | |
212 | rightGap: 5, | |
285a6bda DV |
213 | |
214 | showRoller: false, | |
285a6bda | 215 | xValueParser: Dygraph.dateParser, |
285a6bda | 216 | |
3d67f03b DV |
217 | delimiter: ',', |
218 | ||
285a6bda DV |
219 | sigma: 2.0, |
220 | errorBars: false, | |
221 | fractions: false, | |
222 | wilsonInterval: true, // only relevant if fractions is true | |
5954ef32 | 223 | customBars: false, |
43af96e7 NK |
224 | fillGraph: false, |
225 | fillAlpha: 0.15, | |
f032c51d | 226 | connectSeparatedPoints: false, |
43af96e7 NK |
227 | |
228 | stackedGraph: false, | |
afdc483f NN |
229 | hideOverlayOnMouseOut: true, |
230 | ||
2fccd3dc DV |
231 | // TODO(danvk): support 'onmouseover' and 'never', and remove synonyms. |
232 | legend: 'onmouseover', // the only relevant value at the moment is 'always'. | |
233 | ||
00c281d4 | 234 | stepPlot: false, |
062ef401 JB |
235 | avoidMinZero: false, |
236 | ||
ad1798c2 | 237 | // Sizes of the various chart labels. |
b4202b3d | 238 | titleHeight: 28, |
86cce9e8 DV |
239 | xLabelHeight: 18, |
240 | yLabelWidth: 18, | |
ad1798c2 | 241 | |
423f5ed3 DV |
242 | drawXAxis: true, |
243 | drawYAxis: true, | |
244 | axisLineColor: "black", | |
990d6a35 DV |
245 | axisLineWidth: 0.3, |
246 | gridLineWidth: 0.3, | |
247 | axisLabelColor: "black", | |
248 | axisLabelFont: "Arial", // TODO(danvk): is this implemented? | |
249 | axisLabelWidth: 50, | |
250 | drawYGrid: true, | |
251 | drawXGrid: true, | |
252 | gridLineColor: "rgb(128,128,128)", | |
423f5ed3 | 253 | |
48e614ac | 254 | interactionModel: null, // will be set to Dygraph.Interaction.defaultModel |
b1a3b195 | 255 | animatedZooms: false, // (for now) |
48e614ac | 256 | |
ccd9d7c2 PF |
257 | // Range selector options |
258 | showRangeSelector: false, | |
259 | rangeSelectorHeight: 40, | |
260 | rangeSelectorPlotStrokeColor: "#808FAB", | |
261 | rangeSelectorPlotFillColor: "#A7B1C4", | |
262 | ||
48e614ac DV |
263 | // per-axis options |
264 | axes: { | |
265 | x: { | |
266 | pixelsPerLabel: 60, | |
267 | axisLabelFormatter: Dygraph.dateAxisFormatter, | |
268 | valueFormatter: Dygraph.dateString_, | |
269 | ticker: null // will be set in dygraph-tickers.js | |
270 | }, | |
271 | y: { | |
272 | pixelsPerLabel: 30, | |
273 | valueFormatter: Dygraph.numberValueFormatter, | |
274 | axisLabelFormatter: Dygraph.numberAxisLabelFormatter, | |
275 | ticker: null // will be set in dygraph-tickers.js | |
276 | }, | |
277 | y2: { | |
278 | pixelsPerLabel: 30, | |
279 | valueFormatter: Dygraph.numberValueFormatter, | |
280 | axisLabelFormatter: Dygraph.numberAxisLabelFormatter, | |
281 | ticker: null // will be set in dygraph-tickers.js | |
282 | } | |
283 | } | |
285a6bda DV |
284 | }; |
285 | ||
39b0e098 RK |
286 | // Directions for panning and zooming. Use bit operations when combined |
287 | // values are possible. | |
288 | Dygraph.HORIZONTAL = 1; | |
289 | Dygraph.VERTICAL = 2; | |
290 | ||
e2c21500 DV |
291 | // Installed plugins, in order of precedence (most-general to most-specific). |
292 | // Plugins are installed after they are defined, in plugins/install.js. | |
293 | Dygraph.PLUGINS = [ | |
294 | ]; | |
295 | ||
5c528fa2 DV |
296 | // Used for initializing annotation CSS rules only once. |
297 | Dygraph.addedAnnotationCSS = false; | |
298 | ||
285a6bda DV |
299 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { |
300 | // Labels is no longer a constructor parameter, since it's typically set | |
301 | // directly from the data source. It also conains a name for the x-axis, | |
302 | // which the previous constructor form did not. | |
758a629f | 303 | if (labels !== null) { |
285a6bda DV |
304 | var new_labels = ["Date"]; |
305 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); | |
fc80a396 | 306 | Dygraph.update(attrs, { 'labels': new_labels }); |
285a6bda DV |
307 | } |
308 | this.__init__(div, file, attrs); | |
8e4a6af3 DV |
309 | }; |
310 | ||
6a1aa64f | 311 | /** |
285a6bda | 312 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
7aedf6fe | 313 | * and context <canvas> inside of it. See the constructor for details. |
6a1aa64f | 314 | * on the parameters. |
12e4c741 | 315 | * @param {Element} div the Element to render the graph into. |
6a1aa64f | 316 | * @param {String | Function} file Source data |
6a1aa64f DV |
317 | * @param {Object} attrs Miscellaneous other options |
318 | * @private | |
319 | */ | |
285a6bda | 320 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
a2c8fff4 DV |
321 | // Hack for IE: if we're using excanvas and the document hasn't finished |
322 | // loading yet (and hence may not have initialized whatever it needs to | |
323 | // initialize), then keep calling this routine periodically until it has. | |
324 | if (/MSIE/.test(navigator.userAgent) && !window.opera && | |
325 | typeof(G_vmlCanvasManager) != 'undefined' && | |
326 | document.readyState != 'complete') { | |
327 | var self = this; | |
758a629f | 328 | setTimeout(function() { self.__init__(div, file, attrs); }, 100); |
ccd9d7c2 | 329 | return; |
a2c8fff4 DV |
330 | } |
331 | ||
285a6bda | 332 | // Support two-argument constructor |
758a629f | 333 | if (attrs === null || attrs === undefined) { attrs = {}; } |
285a6bda | 334 | |
48e614ac DV |
335 | attrs = Dygraph.mapLegacyOptions_(attrs); |
336 | ||
337 | if (!div) { | |
338 | Dygraph.error("Constructing dygraph with a non-existent div!"); | |
339 | return; | |
340 | } | |
341 | ||
920208fb PF |
342 | this.isUsingExcanvas_ = typeof(G_vmlCanvasManager) != 'undefined'; |
343 | ||
6a1aa64f | 344 | // Copy the important bits into the object |
32988383 | 345 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
6a1aa64f | 346 | this.maindiv_ = div; |
6a1aa64f | 347 | this.file_ = file; |
285a6bda | 348 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
6a1aa64f | 349 | this.previousVerticalX_ = -1; |
6a1aa64f | 350 | this.fractions_ = attrs.fractions || false; |
6a1aa64f | 351 | this.dateWindow_ = attrs.dateWindow || null; |
8b83c6cc | 352 | |
fe0b7c03 | 353 | this.is_initial_draw_ = true; |
5c528fa2 | 354 | this.annotations_ = []; |
7aedf6fe | 355 | |
45f2c689 | 356 | // Zoomed indicators - These indicate when the graph has been zoomed and on what axis. |
57baab03 NN |
357 | this.zoomed_x_ = false; |
358 | this.zoomed_y_ = false; | |
45f2c689 | 359 | |
f7d6278e DV |
360 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
361 | // div, then only one will be drawn. | |
362 | div.innerHTML = ""; | |
363 | ||
0cb9bd91 DV |
364 | // For historical reasons, the 'width' and 'height' options trump all CSS |
365 | // rules _except_ for an explicit 'width' or 'height' on the div. | |
366 | // As an added convenience, if the div has zero height (like <div></div> does | |
367 | // without any styles), then we use a default height/width. | |
758a629f | 368 | if (div.style.width === '' && attrs.width) { |
0cb9bd91 | 369 | div.style.width = attrs.width + "px"; |
285a6bda | 370 | } |
758a629f | 371 | if (div.style.height === '' && attrs.height) { |
0cb9bd91 | 372 | div.style.height = attrs.height + "px"; |
32988383 | 373 | } |
758a629f | 374 | if (div.style.height === '' && div.clientHeight === 0) { |
0cb9bd91 | 375 | div.style.height = Dygraph.DEFAULT_HEIGHT + "px"; |
758a629f | 376 | if (div.style.width === '') { |
0cb9bd91 DV |
377 | div.style.width = Dygraph.DEFAULT_WIDTH + "px"; |
378 | } | |
c21d2c2d | 379 | } |
fffad740 | 380 | // these will be zero if the dygraph's div is hidden. |
ccd9d7c2 PF |
381 | this.width_ = div.clientWidth; |
382 | this.height_ = div.clientHeight; | |
32988383 | 383 | |
344ba8c0 | 384 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
758a629f DV |
385 | if (attrs.stackedGraph) { |
386 | attrs.fillGraph = true; | |
43af96e7 NK |
387 | // TODO(nikhilk): Add any other stackedGraph checks here. |
388 | } | |
389 | ||
285a6bda DV |
390 | // Dygraphs has many options, some of which interact with one another. |
391 | // To keep track of everything, we maintain two sets of options: | |
392 | // | |
c21d2c2d | 393 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
394 | // this.attrs_ defaults, options derived from user_attrs_, data. |
395 | // | |
396 | // Options are then accessed this.attr_('attr'), which first looks at | |
397 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
398 | // defaults without overriding behavior that the user specifically asks for. | |
399 | this.user_attrs_ = {}; | |
fc80a396 | 400 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 401 | |
48e614ac | 402 | // This sequence ensures that Dygraph.DEFAULT_ATTRS is never modified. |
285a6bda | 403 | this.attrs_ = {}; |
48e614ac | 404 | Dygraph.updateDeep(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 405 | |
16269f6e | 406 | this.boundaryIds_ = []; |
82c6fe4d | 407 | this.setIndexByName_ = {}; |
857a6931 | 408 | this.datasetIndex_ = []; |
6a1aa64f | 409 | |
6a4587ac RK |
410 | this.registeredEvents_ = []; |
411 | ||
6a1aa64f DV |
412 | // Create the containing DIV and other interactive elements |
413 | this.createInterface_(); | |
414 | ||
e2c21500 DV |
415 | // Activate plugins. |
416 | this.plugins_ = []; | |
417 | for (var i = 0; i < Dygraph.PLUGINS.length; i++) { | |
418 | var plugin = Dygraph.PLUGINS[i]; | |
419 | var pluginInstance = new plugin(); | |
420 | var pluginDict = { | |
421 | plugin: pluginInstance, | |
422 | events: {}, | |
423 | options: {}, | |
424 | pluginOptions: {} | |
425 | }; | |
426 | ||
6a4457b4 KW |
427 | var handlers = pluginInstance.activate(this); |
428 | for (var eventName in handlers) { | |
28aa77ac | 429 | // TODO(danvk): validate eventName. |
6a4457b4 KW |
430 | pluginDict.events[eventName] = handlers[eventName]; |
431 | } | |
e2c21500 DV |
432 | |
433 | this.plugins_.push(pluginDict); | |
434 | } | |
435 | ||
436 | // At this point, plugins can no longer register event handlers. | |
437 | // Construct a map from event -> ordered list of [callback, plugin]. | |
438 | this.eventListeners_ = {}; | |
439 | for (var i = 0; i < this.plugins_.length; i++) { | |
440 | var plugin_dict = this.plugins_[i]; | |
441 | for (var eventName in plugin_dict.events) { | |
442 | if (!plugin_dict.events.hasOwnProperty(eventName)) continue; | |
443 | var callback = plugin_dict.events[eventName]; | |
444 | ||
445 | var pair = [plugin_dict.plugin, callback]; | |
446 | if (!(eventName in this.eventListeners_)) { | |
447 | this.eventListeners_[eventName] = [pair]; | |
448 | } else { | |
449 | this.eventListeners_[eventName].push(pair); | |
450 | } | |
451 | } | |
452 | } | |
453 | ||
738fc797 | 454 | this.start_(); |
6a1aa64f DV |
455 | }; |
456 | ||
dcb25130 | 457 | /** |
e2c21500 DV |
458 | * Triggers a cascade of events to the various plugins which are interested in them. |
459 | * Returns true if the "default behavior" should be performed, i.e. if none of | |
460 | * the event listeners called event.preventDefault(). | |
461 | * @private | |
462 | */ | |
463 | Dygraph.prototype.cascadeEvents_ = function(name, extra_props) { | |
464 | if (!name in this.eventListeners_) return true; | |
465 | ||
466 | // QUESTION: can we use objects & prototypes to speed this up? | |
467 | var e = { | |
468 | dygraph: this, | |
469 | cancelable: false, | |
470 | defaultPrevented: false, | |
471 | preventDefault: function() { | |
472 | if (!e.cancelable) throw "Cannot call preventDefault on non-cancelable event."; | |
473 | e.defaultPrevented = true; | |
474 | }, | |
475 | propagationStopped: false, | |
476 | stopPropagation: function() { | |
5bd29cf4 | 477 | e.propagationStopped = true; |
e2c21500 DV |
478 | } |
479 | }; | |
480 | Dygraph.update(e, extra_props); | |
481 | ||
482 | var callback_plugin_pairs = this.eventListeners_[name]; | |
da1c187b KW |
483 | if (callback_plugin_pairs) { |
484 | for (var i = callback_plugin_pairs.length - 1; i >= 0; i--) { | |
485 | var plugin = callback_plugin_pairs[i][0]; | |
486 | var callback = callback_plugin_pairs[i][1]; | |
487 | callback.call(plugin, e); | |
488 | if (e.propagationStopped) break; | |
489 | } | |
e2c21500 DV |
490 | } |
491 | return e.defaultPrevented; | |
492 | }; | |
493 | ||
494 | /** | |
dcb25130 NN |
495 | * Returns the zoomed status of the chart for one or both axes. |
496 | * | |
497 | * Axis is an optional parameter. Can be set to 'x' or 'y'. | |
498 | * | |
499 | * The zoomed status for an axis is set whenever a user zooms using the mouse | |
e5152598 | 500 | * or when the dateWindow or valueRange are updated (unless the isZoomedIgnoreProgrammaticZoom |
dcb25130 NN |
501 | * option is also specified). |
502 | */ | |
57baab03 | 503 | Dygraph.prototype.isZoomed = function(axis) { |
94ea5744 | 504 | if (axis == null) return this.zoomed_x_ || this.zoomed_y_; |
758a629f DV |
505 | if (axis === 'x') return this.zoomed_x_; |
506 | if (axis === 'y') return this.zoomed_y_; | |
94ea5744 | 507 | throw "axis parameter is [" + axis + "] must be null, 'x' or 'y'."; |
57baab03 NN |
508 | }; |
509 | ||
629a09ae DV |
510 | /** |
511 | * Returns information about the Dygraph object, including its containing ID. | |
512 | */ | |
22bd1dfb RK |
513 | Dygraph.prototype.toString = function() { |
514 | var maindiv = this.maindiv_; | |
758a629f | 515 | var id = (maindiv && maindiv.id) ? maindiv.id : maindiv; |
22bd1dfb | 516 | return "[Dygraph " + id + "]"; |
758a629f | 517 | }; |
22bd1dfb | 518 | |
629a09ae DV |
519 | /** |
520 | * @private | |
521 | * Returns the value of an option. This may be set by the user (either in the | |
522 | * constructor or by calling updateOptions) or by dygraphs, and may be set to a | |
523 | * per-series value. | |
524 | * @param { String } name The name of the option, e.g. 'rollPeriod'. | |
525 | * @param { String } [seriesName] The name of the series to which the option | |
526 | * will be applied. If no per-series value of this option is available, then | |
527 | * the global value is returned. This is optional. | |
528 | * @return { ... } The value of the option. | |
529 | */ | |
227b93cc | 530 | Dygraph.prototype.attr_ = function(name, seriesName) { |
028ddf8a DV |
531 | // <REMOVE_FOR_COMBINED> |
532 | if (typeof(Dygraph.OPTIONS_REFERENCE) === 'undefined') { | |
533 | this.error('Must include options reference JS for testing'); | |
534 | } else if (!Dygraph.OPTIONS_REFERENCE.hasOwnProperty(name)) { | |
535 | this.error('Dygraphs is using property ' + name + ', which has no entry ' + | |
536 | 'in the Dygraphs.OPTIONS_REFERENCE listing.'); | |
537 | // Only log this error once. | |
538 | Dygraph.OPTIONS_REFERENCE[name] = true; | |
539 | } | |
540 | // </REMOVE_FOR_COMBINED> | |
857a6931 KW |
541 | |
542 | var sources = []; | |
543 | sources.push(this.attrs_); | |
475f7420 KW |
544 | if (this.user_attrs_) { |
545 | sources.push(this.user_attrs_); | |
546 | if (seriesName) { | |
547 | if (this.user_attrs_.hasOwnProperty(seriesName)) { | |
548 | sources.push(this.user_attrs_[seriesName]); | |
549 | } | |
550 | if (seriesName === this.highlightSet_ && | |
551 | this.user_attrs_.hasOwnProperty('highlightSeriesOpts')) { | |
552 | sources.push(this.user_attrs_['highlightSeriesOpts']); | |
553 | } | |
857a6931 | 554 | } |
285a6bda | 555 | } |
857a6931 KW |
556 | |
557 | var ret = null; | |
558 | for (var i = sources.length - 1; i >= 0; --i) { | |
559 | var source = sources[i]; | |
560 | if (source.hasOwnProperty(name)) { | |
561 | ret = source[name]; | |
562 | break; | |
563 | } | |
285a6bda | 564 | } |
857a6931 | 565 | return ret; |
285a6bda DV |
566 | }; |
567 | ||
6a1aa64f | 568 | /** |
e2c21500 DV |
569 | * Returns the current value for an option, as set in the constructor or via |
570 | * updateOptions. You may pass in an (optional) series name to get per-series | |
571 | * values for the option. | |
572 | * | |
573 | * All values returned by this method should be considered immutable. If you | |
574 | * modify them, there is no guarantee that the changes will be honored or that | |
575 | * dygraphs will remain in a consistent state. If you want to modify an option, | |
576 | * use updateOptions() instead. | |
577 | * | |
578 | * @param { String } name The name of the option (e.g. 'strokeWidth') | |
579 | * @param { String } [opt_seriesName] Series name to get per-series values. | |
580 | * @return { ... } The value of the option. | |
581 | */ | |
582 | Dygraph.prototype.getOption = function(name, opt_seriesName) { | |
583 | return this.attr_(name, opt_seriesName); | |
584 | }; | |
585 | ||
586 | /** | |
48e614ac DV |
587 | * @private |
588 | * @param String} axis The name of the axis (i.e. 'x', 'y' or 'y2') | |
589 | * @return { ... } A function mapping string -> option value | |
590 | */ | |
591 | Dygraph.prototype.optionsViewForAxis_ = function(axis) { | |
592 | var self = this; | |
593 | return function(opt) { | |
758a629f | 594 | var axis_opts = self.user_attrs_.axes; |
48e614ac DV |
595 | if (axis_opts && axis_opts[axis] && axis_opts[axis][opt]) { |
596 | return axis_opts[axis][opt]; | |
597 | } | |
598 | // user-specified attributes always trump defaults, even if they're less | |
599 | // specific. | |
600 | if (typeof(self.user_attrs_[opt]) != 'undefined') { | |
601 | return self.user_attrs_[opt]; | |
602 | } | |
603 | ||
758a629f | 604 | axis_opts = self.attrs_.axes; |
48e614ac DV |
605 | if (axis_opts && axis_opts[axis] && axis_opts[axis][opt]) { |
606 | return axis_opts[axis][opt]; | |
607 | } | |
608 | // check old-style axis options | |
609 | // TODO(danvk): add a deprecation warning if either of these match. | |
610 | if (axis == 'y' && self.axes_[0].hasOwnProperty(opt)) { | |
611 | return self.axes_[0][opt]; | |
612 | } else if (axis == 'y2' && self.axes_[1].hasOwnProperty(opt)) { | |
613 | return self.axes_[1][opt]; | |
614 | } | |
615 | return self.attr_(opt); | |
616 | }; | |
617 | }; | |
618 | ||
619 | /** | |
6a1aa64f | 620 | * Returns the current rolling period, as set by the user or an option. |
6faebb69 | 621 | * @return {Number} The number of points in the rolling window |
6a1aa64f | 622 | */ |
285a6bda | 623 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 624 | return this.rollPeriod_; |
76171648 DV |
625 | }; |
626 | ||
599fb4ad DV |
627 | /** |
628 | * Returns the currently-visible x-range. This can be affected by zooming, | |
629 | * panning or a call to updateOptions. | |
630 | * Returns a two-element array: [left, right]. | |
631 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
632 | */ | |
633 | Dygraph.prototype.xAxisRange = function() { | |
4cac8c7a RK |
634 | return this.dateWindow_ ? this.dateWindow_ : this.xAxisExtremes(); |
635 | }; | |
599fb4ad | 636 | |
4cac8c7a RK |
637 | /** |
638 | * Returns the lower- and upper-bound x-axis values of the | |
639 | * data set. | |
640 | */ | |
641 | Dygraph.prototype.xAxisExtremes = function() { | |
599fb4ad DV |
642 | var left = this.rawData_[0][0]; |
643 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
644 | return [left, right]; | |
645 | }; | |
646 | ||
3230c662 | 647 | /** |
d58ae307 DV |
648 | * Returns the currently-visible y-range for an axis. This can be affected by |
649 | * zooming, panning or a call to updateOptions. Axis indices are zero-based. If | |
650 | * called with no arguments, returns the range of the first axis. | |
3230c662 DV |
651 | * Returns a two-element array: [bottom, top]. |
652 | */ | |
d58ae307 | 653 | Dygraph.prototype.yAxisRange = function(idx) { |
d63e6799 | 654 | if (typeof(idx) == "undefined") idx = 0; |
d64b8fea RK |
655 | if (idx < 0 || idx >= this.axes_.length) { |
656 | return null; | |
657 | } | |
658 | var axis = this.axes_[idx]; | |
659 | return [ axis.computedValueRange[0], axis.computedValueRange[1] ]; | |
d58ae307 DV |
660 | }; |
661 | ||
662 | /** | |
663 | * Returns the currently-visible y-ranges for each axis. This can be affected by | |
664 | * zooming, panning, calls to updateOptions, etc. | |
665 | * Returns an array of [bottom, top] pairs, one for each y-axis. | |
666 | */ | |
667 | Dygraph.prototype.yAxisRanges = function() { | |
668 | var ret = []; | |
669 | for (var i = 0; i < this.axes_.length; i++) { | |
670 | ret.push(this.yAxisRange(i)); | |
671 | } | |
672 | return ret; | |
3230c662 DV |
673 | }; |
674 | ||
d58ae307 | 675 | // TODO(danvk): use these functions throughout dygraphs. |
3230c662 DV |
676 | /** |
677 | * Convert from data coordinates to canvas/div X/Y coordinates. | |
d58ae307 DV |
678 | * If specified, do this conversion for the coordinate system of a particular |
679 | * axis. Uses the first axis by default. | |
3230c662 | 680 | * Returns a two-element array: [X, Y] |
ff022deb | 681 | * |
0747928a | 682 | * Note: use toDomXCoord instead of toDomCoords(x, null) and use toDomYCoord |
ff022deb | 683 | * instead of toDomCoords(null, y, axis). |
3230c662 | 684 | */ |
d58ae307 | 685 | Dygraph.prototype.toDomCoords = function(x, y, axis) { |
ff022deb RK |
686 | return [ this.toDomXCoord(x), this.toDomYCoord(y, axis) ]; |
687 | }; | |
688 | ||
689 | /** | |
690 | * Convert from data x coordinates to canvas/div X coordinate. | |
691 | * If specified, do this conversion for the coordinate system of a particular | |
0037b2a4 RK |
692 | * axis. |
693 | * Returns a single value or null if x is null. | |
ff022deb RK |
694 | */ |
695 | Dygraph.prototype.toDomXCoord = function(x) { | |
758a629f | 696 | if (x === null) { |
ff022deb | 697 | return null; |
758a629f | 698 | } |
ff022deb | 699 | |
3230c662 | 700 | var area = this.plotter_.area; |
ff022deb RK |
701 | var xRange = this.xAxisRange(); |
702 | return area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; | |
758a629f | 703 | }; |
3230c662 | 704 | |
ff022deb RK |
705 | /** |
706 | * Convert from data x coordinates to canvas/div Y coordinate and optional | |
707 | * axis. Uses the first axis by default. | |
708 | * | |
709 | * returns a single value or null if y is null. | |
710 | */ | |
711 | Dygraph.prototype.toDomYCoord = function(y, axis) { | |
0747928a | 712 | var pct = this.toPercentYCoord(y, axis); |
3230c662 | 713 | |
758a629f | 714 | if (pct === null) { |
ff022deb RK |
715 | return null; |
716 | } | |
e4416fb9 | 717 | var area = this.plotter_.area; |
ff022deb | 718 | return area.y + pct * area.h; |
758a629f | 719 | }; |
3230c662 DV |
720 | |
721 | /** | |
722 | * Convert from canvas/div coords to data coordinates. | |
d58ae307 DV |
723 | * If specified, do this conversion for the coordinate system of a particular |
724 | * axis. Uses the first axis by default. | |
ff022deb RK |
725 | * Returns a two-element array: [X, Y]. |
726 | * | |
0747928a | 727 | * Note: use toDataXCoord instead of toDataCoords(x, null) and use toDataYCoord |
ff022deb | 728 | * instead of toDataCoords(null, y, axis). |
3230c662 | 729 | */ |
d58ae307 | 730 | Dygraph.prototype.toDataCoords = function(x, y, axis) { |
ff022deb RK |
731 | return [ this.toDataXCoord(x), this.toDataYCoord(y, axis) ]; |
732 | }; | |
733 | ||
734 | /** | |
735 | * Convert from canvas/div x coordinate to data coordinate. | |
736 | * | |
737 | * If x is null, this returns null. | |
738 | */ | |
739 | Dygraph.prototype.toDataXCoord = function(x) { | |
758a629f | 740 | if (x === null) { |
ff022deb | 741 | return null; |
3230c662 DV |
742 | } |
743 | ||
ff022deb RK |
744 | var area = this.plotter_.area; |
745 | var xRange = this.xAxisRange(); | |
746 | return xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); | |
747 | }; | |
748 | ||
749 | /** | |
750 | * Convert from canvas/div y coord to value. | |
751 | * | |
752 | * If y is null, this returns null. | |
753 | * if axis is null, this uses the first axis. | |
754 | */ | |
755 | Dygraph.prototype.toDataYCoord = function(y, axis) { | |
758a629f | 756 | if (y === null) { |
ff022deb | 757 | return null; |
3230c662 DV |
758 | } |
759 | ||
ff022deb RK |
760 | var area = this.plotter_.area; |
761 | var yRange = this.yAxisRange(axis); | |
762 | ||
b70247dc RK |
763 | if (typeof(axis) == "undefined") axis = 0; |
764 | if (!this.axes_[axis].logscale) { | |
d9816e62 | 765 | return yRange[0] + (area.y + area.h - y) / area.h * (yRange[1] - yRange[0]); |
ff022deb RK |
766 | } else { |
767 | // Computing the inverse of toDomCoord. | |
758a629f | 768 | var pct = (y - area.y) / area.h; |
ff022deb RK |
769 | |
770 | // Computing the inverse of toPercentYCoord. The function was arrived at with | |
771 | // the following steps: | |
772 | // | |
773 | // Original calcuation: | |
d59b6f34 | 774 | // pct = (logr1 - Dygraph.log10(y)) / (logr1 - Dygraph.log10(yRange[0])); |
ff022deb RK |
775 | // |
776 | // Move denominator to both sides: | |
d59b6f34 | 777 | // pct * (logr1 - Dygraph.log10(yRange[0])) = logr1 - Dygraph.log10(y); |
ff022deb RK |
778 | // |
779 | // subtract logr1, and take the negative value. | |
d59b6f34 | 780 | // logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))) = Dygraph.log10(y); |
ff022deb RK |
781 | // |
782 | // Swap both sides of the equation, and we can compute the log of the | |
783 | // return value. Which means we just need to use that as the exponent in | |
784 | // e^exponent. | |
d59b6f34 | 785 | // Dygraph.log10(y) = logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))); |
ff022deb | 786 | |
d59b6f34 RK |
787 | var logr1 = Dygraph.log10(yRange[1]); |
788 | var exponent = logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))); | |
789 | var value = Math.pow(Dygraph.LOG_SCALE, exponent); | |
ff022deb RK |
790 | return value; |
791 | } | |
3230c662 DV |
792 | }; |
793 | ||
e99fde05 | 794 | /** |
ff022deb | 795 | * Converts a y for an axis to a percentage from the top to the |
4cac8c7a | 796 | * bottom of the drawing area. |
ff022deb RK |
797 | * |
798 | * If the coordinate represents a value visible on the canvas, then | |
799 | * the value will be between 0 and 1, where 0 is the top of the canvas. | |
800 | * However, this method will return values outside the range, as | |
801 | * values can fall outside the canvas. | |
802 | * | |
803 | * If y is null, this returns null. | |
804 | * if axis is null, this uses the first axis. | |
629a09ae DV |
805 | * |
806 | * @param { Number } y The data y-coordinate. | |
807 | * @param { Number } [axis] The axis number on which the data coordinate lives. | |
808 | * @return { Number } A fraction in [0, 1] where 0 = the top edge. | |
ff022deb RK |
809 | */ |
810 | Dygraph.prototype.toPercentYCoord = function(y, axis) { | |
758a629f | 811 | if (y === null) { |
ff022deb RK |
812 | return null; |
813 | } | |
7d0e7a0d | 814 | if (typeof(axis) == "undefined") axis = 0; |
ff022deb | 815 | |
ff022deb RK |
816 | var yRange = this.yAxisRange(axis); |
817 | ||
818 | var pct; | |
7d0e7a0d | 819 | if (!this.axes_[axis].logscale) { |
4cac8c7a RK |
820 | // yRange[1] - y is unit distance from the bottom. |
821 | // yRange[1] - yRange[0] is the scale of the range. | |
ff022deb RK |
822 | // (yRange[1] - y) / (yRange[1] - yRange[0]) is the % from the bottom. |
823 | pct = (yRange[1] - y) / (yRange[1] - yRange[0]); | |
824 | } else { | |
d59b6f34 RK |
825 | var logr1 = Dygraph.log10(yRange[1]); |
826 | pct = (logr1 - Dygraph.log10(y)) / (logr1 - Dygraph.log10(yRange[0])); | |
ff022deb RK |
827 | } |
828 | return pct; | |
758a629f | 829 | }; |
ff022deb RK |
830 | |
831 | /** | |
4cac8c7a RK |
832 | * Converts an x value to a percentage from the left to the right of |
833 | * the drawing area. | |
834 | * | |
835 | * If the coordinate represents a value visible on the canvas, then | |
836 | * the value will be between 0 and 1, where 0 is the left of the canvas. | |
837 | * However, this method will return values outside the range, as | |
838 | * values can fall outside the canvas. | |
839 | * | |
840 | * If x is null, this returns null. | |
629a09ae DV |
841 | * @param { Number } x The data x-coordinate. |
842 | * @return { Number } A fraction in [0, 1] where 0 = the left edge. | |
4cac8c7a RK |
843 | */ |
844 | Dygraph.prototype.toPercentXCoord = function(x) { | |
758a629f | 845 | if (x === null) { |
4cac8c7a RK |
846 | return null; |
847 | } | |
848 | ||
4cac8c7a | 849 | var xRange = this.xAxisRange(); |
965a030e | 850 | return (x - xRange[0]) / (xRange[1] - xRange[0]); |
629a09ae | 851 | }; |
4cac8c7a RK |
852 | |
853 | /** | |
e99fde05 | 854 | * Returns the number of columns (including the independent variable). |
629a09ae | 855 | * @return { Integer } The number of columns. |
e99fde05 DV |
856 | */ |
857 | Dygraph.prototype.numColumns = function() { | |
395e98a3 | 858 | return this.rawData_[0] ? this.rawData_[0].length : this.attr_("labels").length; |
e99fde05 DV |
859 | }; |
860 | ||
861 | /** | |
862 | * Returns the number of rows (excluding any header/label row). | |
629a09ae | 863 | * @return { Integer } The number of rows, less any header. |
e99fde05 DV |
864 | */ |
865 | Dygraph.prototype.numRows = function() { | |
866 | return this.rawData_.length; | |
867 | }; | |
868 | ||
869 | /** | |
395e98a3 DV |
870 | * Returns the full range of the x-axis, as determined by the most extreme |
871 | * values in the data set. Not affected by zooming, visibility, etc. | |
769e8bc7 | 872 | * TODO(danvk): merge w/ xAxisExtremes |
395e98a3 DV |
873 | * @return { Array<Number> } A [low, high] pair |
874 | * @private | |
875 | */ | |
876 | Dygraph.prototype.fullXRange_ = function() { | |
877 | if (this.numRows() > 0) { | |
878 | return [this.rawData_[0][0], this.rawData_[this.numRows() - 1][0]]; | |
879 | } else { | |
880 | return [0, 1]; | |
881 | } | |
758a629f | 882 | }; |
395e98a3 DV |
883 | |
884 | /** | |
e99fde05 DV |
885 | * Returns the value in the given row and column. If the row and column exceed |
886 | * the bounds on the data, returns null. Also returns null if the value is | |
887 | * missing. | |
629a09ae DV |
888 | * @param { Number} row The row number of the data (0-based). Row 0 is the |
889 | * first row of data, not a header row. | |
890 | * @param { Number} col The column number of the data (0-based) | |
891 | * @return { Number } The value in the specified cell or null if the row/col | |
892 | * were out of range. | |
e99fde05 DV |
893 | */ |
894 | Dygraph.prototype.getValue = function(row, col) { | |
895 | if (row < 0 || row > this.rawData_.length) return null; | |
896 | if (col < 0 || col > this.rawData_[row].length) return null; | |
897 | ||
898 | return this.rawData_[row][col]; | |
899 | }; | |
900 | ||
629a09ae | 901 | /** |
285a6bda | 902 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 903 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 904 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
905 | * @private |
906 | */ | |
285a6bda | 907 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
908 | // Create the all-enclosing graph div |
909 | var enclosing = this.maindiv_; | |
910 | ||
b0c3b730 DV |
911 | this.graphDiv = document.createElement("div"); |
912 | this.graphDiv.style.width = this.width_ + "px"; | |
913 | this.graphDiv.style.height = this.height_ + "px"; | |
914 | enclosing.appendChild(this.graphDiv); | |
915 | ||
916 | // Create the canvas for interactive parts of the chart. | |
f8cfec73 | 917 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 DV |
918 | this.canvas_.style.position = "absolute"; |
919 | this.canvas_.width = this.width_; | |
920 | this.canvas_.height = this.height_; | |
f8cfec73 DV |
921 | this.canvas_.style.width = this.width_ + "px"; // for IE |
922 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
b0c3b730 | 923 | |
2cf95fff RK |
924 | this.canvas_ctx_ = Dygraph.getContext(this.canvas_); |
925 | ||
b0c3b730 | 926 | // ... and for static parts of the chart. |
6a1aa64f | 927 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
2cf95fff | 928 | this.hidden_ctx_ = Dygraph.getContext(this.hidden_); |
76171648 | 929 | |
ccd9d7c2 PF |
930 | if (this.attr_('showRangeSelector')) { |
931 | // The range selector must be created here so that its canvases and contexts get created here. | |
932 | // For some reason, if the canvases and contexts don't get created here, things don't work in IE. | |
933 | // The range selector also sets xAxisHeight in order to reserve space. | |
934 | this.rangeSelector_ = new DygraphRangeSelector(this); | |
935 | } | |
936 | ||
eb7bf005 EC |
937 | // The interactive parts of the graph are drawn on top of the chart. |
938 | this.graphDiv.appendChild(this.hidden_); | |
939 | this.graphDiv.appendChild(this.canvas_); | |
920208fb PF |
940 | this.mouseEventElement_ = this.createMouseEventElement_(); |
941 | ||
942 | // Create the grapher | |
943 | this.layout_ = new DygraphLayout(this); | |
944 | ||
945 | if (this.rangeSelector_) { | |
946 | // This needs to happen after the graph canvases are added to the div and the layout object is created. | |
947 | this.rangeSelector_.addToGraph(this.graphDiv, this.layout_); | |
948 | } | |
eb7bf005 | 949 | |
76171648 | 950 | var dygraph = this; |
d7eddd78 US |
951 | |
952 | this.mouseMoveHandler = function(e) { | |
421f1773 | 953 | dygraph.mouseMove_(e); |
d7eddd78 | 954 | }; |
6a4587ac | 955 | this.addEvent(this.mouseEventElement_, 'mousemove', this.mouseMoveHandler); |
d7eddd78 US |
956 | |
957 | this.mouseOutHandler = function(e) { | |
421f1773 | 958 | dygraph.mouseOut_(e); |
d7eddd78 | 959 | }; |
6a4587ac | 960 | this.addEvent(this.mouseEventElement_, 'mouseout', this.mouseOutHandler); |
697e70b2 | 961 | |
697e70b2 | 962 | this.createDragInterface_(); |
4b4d1a63 | 963 | |
1c6b239c | 964 | this.resizeHandler = function(e) { |
965 | dygraph.resize(); | |
d7eddd78 | 966 | }; |
1c6b239c | 967 | |
4b4d1a63 DV |
968 | // Update when the window is resized. |
969 | // TODO(danvk): drop frames depending on complexity of the chart. | |
6a4587ac | 970 | this.addEvent(window, 'resize', this.resizeHandler); |
4cfcc38c DV |
971 | }; |
972 | ||
973 | /** | |
974 | * Detach DOM elements in the dygraph and null out all data references. | |
975 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
976 | * usage. See, e.g., the tests/perf.html example. | |
977 | */ | |
978 | Dygraph.prototype.destroy = function() { | |
979 | var removeRecursive = function(node) { | |
980 | while (node.hasChildNodes()) { | |
981 | removeRecursive(node.firstChild); | |
982 | node.removeChild(node.firstChild); | |
983 | } | |
984 | }; | |
6a4587ac RK |
985 | |
986 | for (var idx = 0; idx < this.registeredEvents_.length; idx++) { | |
987 | var reg = this.registeredEvents_[idx]; | |
1cc3540b | 988 | Dygraph.removeEvent(reg.elem, reg.type, reg.fn); |
6a4587ac RK |
989 | } |
990 | this.registeredEvents_ = []; | |
991 | ||
992 | // remove mouse event handlers (This may not be necessary anymore) | |
1cc3540b RK |
993 | Dygraph.removeEvent(this.mouseEventElement_, 'mouseout', this.mouseOutHandler); |
994 | Dygraph.removeEvent(this.mouseEventElement_, 'mousemove', this.mouseMoveHandler); | |
995 | Dygraph.removeEvent(this.mouseEventElement_, 'mousemove', this.mouseUpHandler_); | |
4cfcc38c DV |
996 | removeRecursive(this.maindiv_); |
997 | ||
998 | var nullOut = function(obj) { | |
999 | for (var n in obj) { | |
1000 | if (typeof(obj[n]) === 'object') { | |
1001 | obj[n] = null; | |
1002 | } | |
1003 | } | |
1004 | }; | |
1c6b239c | 1005 | // remove event handlers |
1cc3540b | 1006 | Dygraph.removeEvent(window,'resize',this.resizeHandler); |
1c6b239c | 1007 | this.resizeHandler = null; |
4cfcc38c DV |
1008 | // These may not all be necessary, but it can't hurt... |
1009 | nullOut(this.layout_); | |
1010 | nullOut(this.plotter_); | |
1011 | nullOut(this); | |
1012 | }; | |
6a1aa64f DV |
1013 | |
1014 | /** | |
629a09ae DV |
1015 | * Creates the canvas on which the chart will be drawn. Only the Renderer ever |
1016 | * draws on this particular canvas. All Dygraph work (i.e. drawing hover dots | |
1017 | * or the zoom rectangles) is done on this.canvas_. | |
8846615a | 1018 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
1019 | * @return {Object} The newly-created canvas |
1020 | * @private | |
1021 | */ | |
285a6bda | 1022 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 | 1023 | var h = Dygraph.createCanvas(); |
6a1aa64f | 1024 | h.style.position = "absolute"; |
9ac5e4ae DV |
1025 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
1026 | // some extra area to make it easier to zoom in on the far left and far | |
1027 | // right. h needs to be precisely the plot area, so that clipping occurs. | |
6a1aa64f DV |
1028 | h.style.top = canvas.style.top; |
1029 | h.style.left = canvas.style.left; | |
1030 | h.width = this.width_; | |
1031 | h.height = this.height_; | |
f8cfec73 DV |
1032 | h.style.width = this.width_ + "px"; // for IE |
1033 | h.style.height = this.height_ + "px"; // for IE | |
6a1aa64f DV |
1034 | return h; |
1035 | }; | |
1036 | ||
629a09ae | 1037 | /** |
920208fb PF |
1038 | * Creates an overlay element used to handle mouse events. |
1039 | * @return {Object} The mouse event element. | |
1040 | * @private | |
1041 | */ | |
1042 | Dygraph.prototype.createMouseEventElement_ = function() { | |
1043 | if (this.isUsingExcanvas_) { | |
1044 | var elem = document.createElement("div"); | |
1045 | elem.style.position = 'absolute'; | |
1046 | elem.style.backgroundColor = 'white'; | |
1047 | elem.style.filter = 'alpha(opacity=0)'; | |
1048 | elem.style.width = this.width_ + "px"; | |
1049 | elem.style.height = this.height_ + "px"; | |
1050 | this.graphDiv.appendChild(elem); | |
1051 | return elem; | |
1052 | } else { | |
1053 | return this.canvas_; | |
1054 | } | |
1055 | }; | |
1056 | ||
1057 | /** | |
6a1aa64f DV |
1058 | * Generate a set of distinct colors for the data series. This is done with a |
1059 | * color wheel. Saturation/Value are customizable, and the hue is | |
1060 | * equally-spaced around the color wheel. If a custom set of colors is | |
1061 | * specified, that is used instead. | |
6a1aa64f DV |
1062 | * @private |
1063 | */ | |
285a6bda | 1064 | Dygraph.prototype.setColors_ = function() { |
285a6bda | 1065 | var num = this.attr_("labels").length - 1; |
6a1aa64f | 1066 | this.colors_ = []; |
285a6bda | 1067 | var colors = this.attr_('colors'); |
758a629f | 1068 | var i; |
285a6bda DV |
1069 | if (!colors) { |
1070 | var sat = this.attr_('colorSaturation') || 1.0; | |
1071 | var val = this.attr_('colorValue') || 0.5; | |
2aa21213 | 1072 | var half = Math.ceil(num / 2); |
758a629f | 1073 | for (i = 1; i <= num; i++) { |
ec1959eb | 1074 | if (!this.visibility()[i-1]) continue; |
43af96e7 | 1075 | // alternate colors for high contrast. |
2aa21213 | 1076 | var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2); |
43af96e7 NK |
1077 | var hue = (1.0 * idx/ (1 + num)); |
1078 | this.colors_.push(Dygraph.hsvToRGB(hue, sat, val)); | |
6a1aa64f DV |
1079 | } |
1080 | } else { | |
758a629f | 1081 | for (i = 0; i < num; i++) { |
ec1959eb | 1082 | if (!this.visibility()[i]) continue; |
285a6bda | 1083 | var colorStr = colors[i % colors.length]; |
f474c2a3 | 1084 | this.colors_.push(colorStr); |
6a1aa64f DV |
1085 | } |
1086 | } | |
600d841a DV |
1087 | |
1088 | this.plotter_.setColors(this.colors_); | |
629a09ae | 1089 | }; |
6a1aa64f | 1090 | |
43af96e7 NK |
1091 | /** |
1092 | * Return the list of colors. This is either the list of colors passed in the | |
629a09ae | 1093 | * attributes or the autogenerated list of rgb(r,g,b) strings. |
e2c21500 | 1094 | * This does not return colors for invisible series. |
43af96e7 NK |
1095 | * @return {Array<string>} The list of colors. |
1096 | */ | |
1097 | Dygraph.prototype.getColors = function() { | |
1098 | return this.colors_; | |
1099 | }; | |
1100 | ||
6a1aa64f | 1101 | /** |
e2c21500 DV |
1102 | * Returns a few attributes of a series, i.e. its color, its visibility, which |
1103 | * axis it's assigned to, and its column in the original data. | |
1104 | * Returns null if the series does not exist. | |
1105 | * Otherwise, returns an object with column, visibility, color and axis properties. | |
1106 | * The "axis" property will be set to 1 for y1 and 2 for y2. | |
1107 | * The "column" property can be fed back into getValue(row, column) to get | |
1108 | * values for this series. | |
6a1aa64f | 1109 | */ |
e2c21500 DV |
1110 | Dygraph.prototype.getPropertiesForSeries = function(series_name) { |
1111 | var idx = -1; | |
1112 | var labels = this.getLabels(); | |
1113 | for (var i = 1; i < labels.length; i++) { | |
1114 | if (labels[i] == series_name) { | |
1115 | idx = i; | |
1116 | break; | |
b0c3b730 | 1117 | } |
6a1aa64f | 1118 | } |
e2c21500 | 1119 | if (idx == -1) return null; |
0abfbd7e | 1120 | |
e2c21500 DV |
1121 | return { |
1122 | name: series_name, | |
1123 | column: idx, | |
1124 | visible: this.visibility()[idx - 1], | |
1125 | color: this.plotter_.colors[series_name], | |
1126 | axis: 1 + this.seriesToAxisMap_[series_name] | |
1127 | }; | |
0abfbd7e DV |
1128 | }; |
1129 | ||
1130 | /** | |
6a1aa64f | 1131 | * Create the text box to adjust the averaging period |
6a1aa64f DV |
1132 | * @private |
1133 | */ | |
285a6bda | 1134 | Dygraph.prototype.createRollInterface_ = function() { |
8c69de65 DV |
1135 | // Create a roller if one doesn't exist already. |
1136 | if (!this.roller_) { | |
1137 | this.roller_ = document.createElement("input"); | |
1138 | this.roller_.type = "text"; | |
1139 | this.roller_.style.display = "none"; | |
1140 | this.graphDiv.appendChild(this.roller_); | |
1141 | } | |
1142 | ||
1143 | var display = this.attr_('showRoller') ? 'block' : 'none'; | |
26ca7938 | 1144 | |
0c38f187 | 1145 | var area = this.plotter_.area; |
b0c3b730 DV |
1146 | var textAttr = { "position": "absolute", |
1147 | "zIndex": 10, | |
0c38f187 DV |
1148 | "top": (area.y + area.h - 25) + "px", |
1149 | "left": (area.x + 1) + "px", | |
b0c3b730 | 1150 | "display": display |
6a1aa64f | 1151 | }; |
8c69de65 DV |
1152 | this.roller_.size = "2"; |
1153 | this.roller_.value = this.rollPeriod_; | |
b0c3b730 | 1154 | for (var name in textAttr) { |
85b99f0b | 1155 | if (textAttr.hasOwnProperty(name)) { |
8c69de65 | 1156 | this.roller_.style[name] = textAttr[name]; |
85b99f0b | 1157 | } |
b0c3b730 DV |
1158 | } |
1159 | ||
76171648 | 1160 | var dygraph = this; |
8c69de65 | 1161 | this.roller_.onchange = function() { dygraph.adjustRoll(dygraph.roller_.value); }; |
76171648 DV |
1162 | }; |
1163 | ||
629a09ae DV |
1164 | /** |
1165 | * @private | |
629a09ae DV |
1166 | * Converts page the x-coordinate of the event to pixel x-coordinates on the |
1167 | * canvas (i.e. DOM Coords). | |
1168 | */ | |
062ef401 | 1169 | Dygraph.prototype.dragGetX_ = function(e, context) { |
758a629f | 1170 | return Dygraph.pageX(e) - context.px; |
062ef401 | 1171 | }; |
bce01b0f | 1172 | |
629a09ae DV |
1173 | /** |
1174 | * @private | |
1175 | * Converts page the y-coordinate of the event to pixel y-coordinates on the | |
1176 | * canvas (i.e. DOM Coords). | |
1177 | */ | |
062ef401 | 1178 | Dygraph.prototype.dragGetY_ = function(e, context) { |
758a629f | 1179 | return Dygraph.pageY(e) - context.py; |
062ef401 | 1180 | }; |
ee672584 | 1181 | |
629a09ae | 1182 | /** |
062ef401 JB |
1183 | * Set up all the mouse handlers needed to capture dragging behavior for zoom |
1184 | * events. | |
1185 | * @private | |
1186 | */ | |
1187 | Dygraph.prototype.createDragInterface_ = function() { | |
1188 | var context = { | |
1189 | // Tracks whether the mouse is down right now | |
1190 | isZooming: false, | |
1191 | isPanning: false, // is this drag part of a pan? | |
1192 | is2DPan: false, // if so, is that pan 1- or 2-dimensional? | |
8442269f RK |
1193 | dragStartX: null, // pixel coordinates |
1194 | dragStartY: null, // pixel coordinates | |
1195 | dragEndX: null, // pixel coordinates | |
1196 | dragEndY: null, // pixel coordinates | |
062ef401 | 1197 | dragDirection: null, |
8442269f RK |
1198 | prevEndX: null, // pixel coordinates |
1199 | prevEndY: null, // pixel coordinates | |
062ef401 | 1200 | prevDragDirection: null, |
421f1773 | 1201 | cancelNextDblclick: false, // see comment in dygraph-interaction-model.js |
062ef401 | 1202 | |
ec291cbe RK |
1203 | // The value on the left side of the graph when a pan operation starts. |
1204 | initialLeftmostDate: null, | |
1205 | ||
1206 | // The number of units each pixel spans. (This won't be valid for log | |
1207 | // scales) | |
1208 | xUnitsPerPixel: null, | |
062ef401 JB |
1209 | |
1210 | // TODO(danvk): update this comment | |
1211 | // The range in second/value units that the viewport encompasses during a | |
1212 | // panning operation. | |
1213 | dateRange: null, | |
1214 | ||
8442269f RK |
1215 | // Top-left corner of the canvas, in DOM coords |
1216 | // TODO(konigsberg): Rename topLeftCanvasX, topLeftCanvasY. | |
062ef401 JB |
1217 | px: 0, |
1218 | py: 0, | |
1219 | ||
965a030e | 1220 | // Values for use with panEdgeFraction, which limit how far outside the |
4cac8c7a RK |
1221 | // graph's data boundaries it can be panned. |
1222 | boundedDates: null, // [minDate, maxDate] | |
1223 | boundedValues: null, // [[minValue, maxValue] ...] | |
1224 | ||
6a4587ac RK |
1225 | // contextB is the same thing as this context object but renamed. |
1226 | initializeMouseDown: function(event, g, contextB) { | |
062ef401 JB |
1227 | // prevents mouse drags from selecting page text. |
1228 | if (event.preventDefault) { | |
1229 | event.preventDefault(); // Firefox, Chrome, etc. | |
6a1aa64f | 1230 | } else { |
062ef401 JB |
1231 | event.returnValue = false; // IE |
1232 | event.cancelBubble = true; | |
6a1aa64f DV |
1233 | } |
1234 | ||
6a4587ac RK |
1235 | contextB.px = Dygraph.findPosX(g.canvas_); |
1236 | contextB.py = Dygraph.findPosY(g.canvas_); | |
1237 | contextB.dragStartX = g.dragGetX_(event, contextB); | |
1238 | contextB.dragStartY = g.dragGetY_(event, contextB); | |
1239 | contextB.cancelNextDblclick = false; | |
6a1aa64f | 1240 | } |
062ef401 | 1241 | }; |
2b188b3d | 1242 | |
062ef401 | 1243 | var interactionModel = this.attr_("interactionModel"); |
8b83c6cc | 1244 | |
062ef401 JB |
1245 | // Self is the graph. |
1246 | var self = this; | |
6faebb69 | 1247 | |
062ef401 JB |
1248 | // Function that binds the graph and context to the handler. |
1249 | var bindHandler = function(handler) { | |
1250 | return function(event) { | |
1251 | handler(event, self, context); | |
1252 | }; | |
1253 | }; | |
1254 | ||
1255 | for (var eventName in interactionModel) { | |
1256 | if (!interactionModel.hasOwnProperty(eventName)) continue; | |
6a4587ac | 1257 | this.addEvent(this.mouseEventElement_, eventName, |
062ef401 JB |
1258 | bindHandler(interactionModel[eventName])); |
1259 | } | |
1260 | ||
1261 | // If the user releases the mouse button during a drag, but not over the | |
1262 | // canvas, then it doesn't count as a zooming action. | |
cb1261cb | 1263 | this.mouseUpHandler_ = function(event) { |
062ef401 JB |
1264 | if (context.isZooming || context.isPanning) { |
1265 | context.isZooming = false; | |
1266 | context.dragStartX = null; | |
1267 | context.dragStartY = null; | |
1268 | } | |
1269 | ||
1270 | if (context.isPanning) { | |
1271 | context.isPanning = false; | |
1272 | context.draggingDate = null; | |
1273 | context.dateRange = null; | |
1274 | for (var i = 0; i < self.axes_.length; i++) { | |
1275 | delete self.axes_[i].draggingValue; | |
1276 | delete self.axes_[i].dragValueRange; | |
1277 | } | |
1278 | } | |
cb1261cb DV |
1279 | }; |
1280 | ||
6a4587ac | 1281 | this.addEvent(document, 'mouseup', this.mouseUpHandler_); |
6a1aa64f DV |
1282 | }; |
1283 | ||
1284 | /** | |
1285 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
1286 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
1287 | * avoid extra redrawing, but it's tricky to avoid interactions with the status | |
1288 | * dots. | |
ccd9d7c2 | 1289 | * |
39b0e098 RK |
1290 | * @param {Number} direction the direction of the zoom rectangle. Acceptable |
1291 | * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL. | |
6a1aa64f DV |
1292 | * @param {Number} startX The X position where the drag started, in canvas |
1293 | * coordinates. | |
1294 | * @param {Number} endX The current X position of the drag, in canvas coords. | |
8b83c6cc RK |
1295 | * @param {Number} startY The Y position where the drag started, in canvas |
1296 | * coordinates. | |
1297 | * @param {Number} endY The current Y position of the drag, in canvas coords. | |
39b0e098 | 1298 | * @param {Number} prevDirection the value of direction on the previous call to |
8b83c6cc | 1299 | * this function. Used to avoid excess redrawing |
6a1aa64f DV |
1300 | * @param {Number} prevEndX The value of endX on the previous call to this |
1301 | * function. Used to avoid excess redrawing | |
8b83c6cc RK |
1302 | * @param {Number} prevEndY The value of endY on the previous call to this |
1303 | * function. Used to avoid excess redrawing | |
6a1aa64f DV |
1304 | * @private |
1305 | */ | |
7201b11e JB |
1306 | Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY, |
1307 | endY, prevDirection, prevEndX, | |
1308 | prevEndY) { | |
2cf95fff | 1309 | var ctx = this.canvas_ctx_; |
6a1aa64f DV |
1310 | |
1311 | // Clean up from the previous rect if necessary | |
39b0e098 | 1312 | if (prevDirection == Dygraph.HORIZONTAL) { |
fa54c193 FXB |
1313 | ctx.clearRect(Math.min(startX, prevEndX), this.layout_.getPlotArea().y, |
1314 | Math.abs(startX - prevEndX), this.layout_.getPlotArea().h); | |
39b0e098 | 1315 | } else if (prevDirection == Dygraph.VERTICAL){ |
fa54c193 FXB |
1316 | ctx.clearRect(this.layout_.getPlotArea().x, Math.min(startY, prevEndY), |
1317 | this.layout_.getPlotArea().w, Math.abs(startY - prevEndY)); | |
6a1aa64f DV |
1318 | } |
1319 | ||
1320 | // Draw a light-grey rectangle to show the new viewing area | |
39b0e098 | 1321 | if (direction == Dygraph.HORIZONTAL) { |
8b83c6cc RK |
1322 | if (endX && startX) { |
1323 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
fa54c193 FXB |
1324 | ctx.fillRect(Math.min(startX, endX), this.layout_.getPlotArea().y, |
1325 | Math.abs(endX - startX), this.layout_.getPlotArea().h); | |
8b83c6cc | 1326 | } |
920208fb | 1327 | } else if (direction == Dygraph.VERTICAL) { |
8b83c6cc RK |
1328 | if (endY && startY) { |
1329 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
fa54c193 FXB |
1330 | ctx.fillRect(this.layout_.getPlotArea().x, Math.min(startY, endY), |
1331 | this.layout_.getPlotArea().w, Math.abs(endY - startY)); | |
8b83c6cc | 1332 | } |
6a1aa64f | 1333 | } |
920208fb PF |
1334 | |
1335 | if (this.isUsingExcanvas_) { | |
1336 | this.currentZoomRectArgs_ = [direction, startX, endX, startY, endY, 0, 0, 0]; | |
1337 | } | |
1338 | }; | |
1339 | ||
1340 | /** | |
1341 | * Clear the zoom rectangle (and perform no zoom). | |
1342 | * @private | |
1343 | */ | |
1344 | Dygraph.prototype.clearZoomRect_ = function() { | |
1345 | this.currentZoomRectArgs_ = null; | |
1346 | this.canvas_ctx_.clearRect(0, 0, this.canvas_.width, this.canvas_.height); | |
6a1aa64f DV |
1347 | }; |
1348 | ||
1349 | /** | |
8b83c6cc RK |
1350 | * Zoom to something containing [lowX, highX]. These are pixel coordinates in |
1351 | * the canvas. The exact zoom window may be slightly larger if there are no data | |
1352 | * points near lowX or highX. Don't confuse this function with doZoomXDates, | |
1353 | * which accepts dates that match the raw data. This function redraws the graph. | |
d58ae307 | 1354 | * |
6a1aa64f DV |
1355 | * @param {Number} lowX The leftmost pixel value that should be visible. |
1356 | * @param {Number} highX The rightmost pixel value that should be visible. | |
1357 | * @private | |
1358 | */ | |
8b83c6cc | 1359 | Dygraph.prototype.doZoomX_ = function(lowX, highX) { |
920208fb | 1360 | this.currentZoomRectArgs_ = null; |
6a1aa64f | 1361 | // Find the earliest and latest dates contained in this canvasx range. |
8b83c6cc | 1362 | // Convert the call to date ranges of the raw data. |
ff022deb RK |
1363 | var minDate = this.toDataXCoord(lowX); |
1364 | var maxDate = this.toDataXCoord(highX); | |
8b83c6cc RK |
1365 | this.doZoomXDates_(minDate, maxDate); |
1366 | }; | |
6a1aa64f | 1367 | |
8b83c6cc | 1368 | /** |
b1a3b195 DV |
1369 | * Transition function to use in animations. Returns values between 0.0 |
1370 | * (totally old values) and 1.0 (totally new values) for each frame. | |
1371 | * @private | |
1372 | */ | |
1373 | Dygraph.zoomAnimationFunction = function(frame, numFrames) { | |
1374 | var k = 1.5; | |
1375 | return (1.0 - Math.pow(k, -frame)) / (1.0 - Math.pow(k, -numFrames)); | |
1376 | }; | |
1377 | ||
1378 | /** | |
8b83c6cc RK |
1379 | * Zoom to something containing [minDate, maxDate] values. Don't confuse this |
1380 | * method with doZoomX which accepts pixel coordinates. This function redraws | |
1381 | * the graph. | |
d58ae307 | 1382 | * |
8b83c6cc RK |
1383 | * @param {Number} minDate The minimum date that should be visible. |
1384 | * @param {Number} maxDate The maximum date that should be visible. | |
1385 | * @private | |
1386 | */ | |
1387 | Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) { | |
b1a3b195 DV |
1388 | // TODO(danvk): when yAxisRange is null (i.e. "fit to data", the animation |
1389 | // can produce strange effects. Rather than the y-axis transitioning slowly | |
1390 | // between values, it can jerk around.) | |
1391 | var old_window = this.xAxisRange(); | |
1392 | var new_window = [minDate, maxDate]; | |
57baab03 | 1393 | this.zoomed_x_ = true; |
b1a3b195 DV |
1394 | var that = this; |
1395 | this.doAnimatedZoom(old_window, new_window, null, null, function() { | |
1396 | if (that.attr_("zoomCallback")) { | |
1397 | that.attr_("zoomCallback")(minDate, maxDate, that.yAxisRanges()); | |
1398 | } | |
1399 | }); | |
8b83c6cc RK |
1400 | }; |
1401 | ||
1402 | /** | |
1403 | * Zoom to something containing [lowY, highY]. These are pixel coordinates in | |
d58ae307 DV |
1404 | * the canvas. This function redraws the graph. |
1405 | * | |
8b83c6cc RK |
1406 | * @param {Number} lowY The topmost pixel value that should be visible. |
1407 | * @param {Number} highY The lowest pixel value that should be visible. | |
1408 | * @private | |
1409 | */ | |
1410 | Dygraph.prototype.doZoomY_ = function(lowY, highY) { | |
920208fb | 1411 | this.currentZoomRectArgs_ = null; |
d58ae307 DV |
1412 | // Find the highest and lowest values in pixel range for each axis. |
1413 | // Note that lowY (in pixels) corresponds to the max Value (in data coords). | |
1414 | // This is because pixels increase as you go down on the screen, whereas data | |
1415 | // coordinates increase as you go up the screen. | |
b1a3b195 DV |
1416 | var oldValueRanges = this.yAxisRanges(); |
1417 | var newValueRanges = []; | |
d58ae307 | 1418 | for (var i = 0; i < this.axes_.length; i++) { |
ff022deb RK |
1419 | var hi = this.toDataYCoord(lowY, i); |
1420 | var low = this.toDataYCoord(highY, i); | |
b1a3b195 | 1421 | newValueRanges.push([low, hi]); |
d58ae307 | 1422 | } |
8b83c6cc | 1423 | |
57baab03 | 1424 | this.zoomed_y_ = true; |
b1a3b195 DV |
1425 | var that = this; |
1426 | this.doAnimatedZoom(null, null, oldValueRanges, newValueRanges, function() { | |
1427 | if (that.attr_("zoomCallback")) { | |
1428 | var xRange = that.xAxisRange(); | |
b1a3b195 DV |
1429 | that.attr_("zoomCallback")(xRange[0], xRange[1], that.yAxisRanges()); |
1430 | } | |
1431 | }); | |
8b83c6cc RK |
1432 | }; |
1433 | ||
1434 | /** | |
1435 | * Reset the zoom to the original view coordinates. This is the same as | |
1436 | * double-clicking on the graph. | |
d58ae307 | 1437 | * |
8b83c6cc RK |
1438 | * @private |
1439 | */ | |
1440 | Dygraph.prototype.doUnzoom_ = function() { | |
b1a3b195 | 1441 | var dirty = false, dirtyX = false, dirtyY = false; |
758a629f | 1442 | if (this.dateWindow_ !== null) { |
d58ae307 | 1443 | dirty = true; |
b1a3b195 | 1444 | dirtyX = true; |
8b83c6cc | 1445 | } |
d58ae307 DV |
1446 | |
1447 | for (var i = 0; i < this.axes_.length; i++) { | |
1f6a6254 | 1448 | if (typeof(this.axes_[i].valueWindow) !== 'undefined' && this.axes_[i].valueWindow !== null) { |
d58ae307 | 1449 | dirty = true; |
b1a3b195 | 1450 | dirtyY = true; |
d58ae307 | 1451 | } |
8b83c6cc RK |
1452 | } |
1453 | ||
da1369a5 DV |
1454 | // Clear any selection, since it's likely to be drawn in the wrong place. |
1455 | this.clearSelection(); | |
1456 | ||
8b83c6cc | 1457 | if (dirty) { |
57baab03 NN |
1458 | this.zoomed_x_ = false; |
1459 | this.zoomed_y_ = false; | |
b1a3b195 DV |
1460 | |
1461 | var minDate = this.rawData_[0][0]; | |
1462 | var maxDate = this.rawData_[this.rawData_.length - 1][0]; | |
1463 | ||
1464 | // With only one frame, don't bother calculating extreme ranges. | |
1465 | // TODO(danvk): merge this block w/ the code below. | |
1466 | if (!this.attr_("animatedZooms")) { | |
1467 | this.dateWindow_ = null; | |
758a629f DV |
1468 | for (i = 0; i < this.axes_.length; i++) { |
1469 | if (this.axes_[i].valueWindow !== null) { | |
b1a3b195 DV |
1470 | delete this.axes_[i].valueWindow; |
1471 | } | |
1472 | } | |
1473 | this.drawGraph_(); | |
1474 | if (this.attr_("zoomCallback")) { | |
1475 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); | |
1476 | } | |
1477 | return; | |
1478 | } | |
1479 | ||
1480 | var oldWindow=null, newWindow=null, oldValueRanges=null, newValueRanges=null; | |
1481 | if (dirtyX) { | |
1482 | oldWindow = this.xAxisRange(); | |
1483 | newWindow = [minDate, maxDate]; | |
1484 | } | |
1485 | ||
1486 | if (dirtyY) { | |
1487 | oldValueRanges = this.yAxisRanges(); | |
1488 | // TODO(danvk): this is pretty inefficient | |
1489 | var packed = this.gatherDatasets_(this.rolledSeries_, null); | |
1490 | var extremes = packed[1]; | |
1491 | ||
1492 | // this has the side-effect of modifying this.axes_. | |
1493 | // this doesn't make much sense in this context, but it's convenient (we | |
1494 | // need this.axes_[*].extremeValues) and not harmful since we'll be | |
1495 | // calling drawGraph_ shortly, which clobbers these values. | |
1496 | this.computeYAxisRanges_(extremes); | |
1497 | ||
1498 | newValueRanges = []; | |
758a629f | 1499 | for (i = 0; i < this.axes_.length; i++) { |
1f6a6254 US |
1500 | var axis = this.axes_[i]; |
1501 | newValueRanges.push(axis.valueRange != null ? axis.valueRange : axis.extremeRange); | |
b1a3b195 DV |
1502 | } |
1503 | } | |
1504 | ||
1505 | var that = this; | |
1506 | this.doAnimatedZoom(oldWindow, newWindow, oldValueRanges, newValueRanges, | |
1507 | function() { | |
1508 | that.dateWindow_ = null; | |
1509 | for (var i = 0; i < that.axes_.length; i++) { | |
758a629f | 1510 | if (that.axes_[i].valueWindow !== null) { |
b1a3b195 DV |
1511 | delete that.axes_[i].valueWindow; |
1512 | } | |
1513 | } | |
1514 | if (that.attr_("zoomCallback")) { | |
1515 | that.attr_("zoomCallback")(minDate, maxDate, that.yAxisRanges()); | |
1516 | } | |
1517 | }); | |
1518 | } | |
1519 | }; | |
1520 | ||
1521 | /** | |
1522 | * Combined animation logic for all zoom functions. | |
1523 | * either the x parameters or y parameters may be null. | |
1524 | * @private | |
1525 | */ | |
1526 | Dygraph.prototype.doAnimatedZoom = function(oldXRange, newXRange, oldYRanges, newYRanges, callback) { | |
1527 | var steps = this.attr_("animatedZooms") ? Dygraph.ANIMATION_STEPS : 1; | |
1528 | ||
1529 | var windows = []; | |
1530 | var valueRanges = []; | |
758a629f | 1531 | var step, frac; |
b1a3b195 | 1532 | |
758a629f DV |
1533 | if (oldXRange !== null && newXRange !== null) { |
1534 | for (step = 1; step <= steps; step++) { | |
1535 | frac = Dygraph.zoomAnimationFunction(step, steps); | |
b1a3b195 DV |
1536 | windows[step-1] = [oldXRange[0]*(1-frac) + frac*newXRange[0], |
1537 | oldXRange[1]*(1-frac) + frac*newXRange[1]]; | |
8b83c6cc | 1538 | } |
67e650dc | 1539 | } |
b1a3b195 | 1540 | |
758a629f DV |
1541 | if (oldYRanges !== null && newYRanges !== null) { |
1542 | for (step = 1; step <= steps; step++) { | |
1543 | frac = Dygraph.zoomAnimationFunction(step, steps); | |
b1a3b195 DV |
1544 | var thisRange = []; |
1545 | for (var j = 0; j < this.axes_.length; j++) { | |
1546 | thisRange.push([oldYRanges[j][0]*(1-frac) + frac*newYRanges[j][0], | |
1547 | oldYRanges[j][1]*(1-frac) + frac*newYRanges[j][1]]); | |
1548 | } | |
1549 | valueRanges[step-1] = thisRange; | |
1550 | } | |
1551 | } | |
1552 | ||
1553 | var that = this; | |
1554 | Dygraph.repeatAndCleanup(function(step) { | |
1555 | if (valueRanges.length) { | |
1556 | for (var i = 0; i < that.axes_.length; i++) { | |
1557 | var w = valueRanges[step][i]; | |
1558 | that.axes_[i].valueWindow = [w[0], w[1]]; | |
1559 | } | |
1560 | } | |
1561 | if (windows.length) { | |
1562 | that.dateWindow_ = windows[step]; | |
1563 | } | |
1564 | that.drawGraph_(); | |
1565 | }, steps, Dygraph.ANIMATION_DURATION / steps, callback); | |
6a1aa64f DV |
1566 | }; |
1567 | ||
1568 | /** | |
857a6931 KW |
1569 | * Get the current graph's area object. |
1570 | * | |
1571 | * Returns: {x, y, w, h} | |
6a1aa64f | 1572 | */ |
857a6931 KW |
1573 | Dygraph.prototype.getArea = function() { |
1574 | return this.plotter_.area; | |
1575 | }; | |
e863a17d | 1576 | |
857a6931 KW |
1577 | /** |
1578 | * Convert a mouse event to DOM coordinates relative to the graph origin. | |
1579 | * | |
1580 | * Returns a two-element array: [X, Y]. | |
1581 | */ | |
1582 | Dygraph.prototype.eventToDomCoords = function(event) { | |
4cac8c7a | 1583 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_); |
857a6931 KW |
1584 | var canvasy = Dygraph.pageY(event) - Dygraph.findPosY(this.mouseEventElement_); |
1585 | return [canvasx, canvasy]; | |
1586 | }; | |
4cac8c7a | 1587 | |
857a6931 KW |
1588 | /** |
1589 | * Given a canvas X coordinate, find the closest row. | |
1590 | * @param {Number} domX graph-relative DOM X coordinate | |
1591 | * Returns: row number, integer | |
1592 | * @private | |
1593 | */ | |
1594 | Dygraph.prototype.findClosestRow = function(domX) { | |
81cb07d6 | 1595 | var minDistX = Infinity; |
6a1aa64f | 1596 | var idx = -1; |
857a6931 KW |
1597 | var points = this.layout_.points; |
1598 | var l = points.length; | |
1599 | for (var i = 0; i < l; i++) { | |
8a7cc60e | 1600 | var point = points[i]; |
04c104d7 | 1601 | if (!Dygraph.isValidPoint(point, true)) continue; |
857a6931 | 1602 | var dist = Math.abs(point.canvasx - domX); |
81cb07d6 | 1603 | if (dist < minDistX) { |
a937d031 KW |
1604 | minDistX = dist; |
1605 | idx = i; | |
1606 | } | |
6a1aa64f | 1607 | } |
857a6931 KW |
1608 | return this.idxToRow_(idx); |
1609 | }; | |
6a1aa64f | 1610 | |
857a6931 | 1611 | /** |
2a02e5dd KW |
1612 | * Given canvas X,Y coordinates, find the closest point. |
1613 | * | |
1614 | * This finds the individual data point across all visible series | |
1615 | * that's closest to the supplied DOM coordinates using the standard | |
1616 | * Euclidean X,Y distance. | |
1617 | * | |
857a6931 KW |
1618 | * @param {Number} domX graph-relative DOM X coordinate |
1619 | * @param {Number} domY graph-relative DOM Y coordinate | |
1620 | * Returns: {row, seriesName, point} | |
1621 | * @private | |
1622 | */ | |
1623 | Dygraph.prototype.findClosestPoint = function(domX, domY) { | |
81cb07d6 | 1624 | var minDist = Infinity; |
857a6931 KW |
1625 | var idx = -1; |
1626 | var points = this.layout_.points; | |
1627 | var dist, dx, dy, point, closestPoint, closestSeries; | |
1628 | for (var setIdx = 0; setIdx < this.layout_.datasets.length; ++setIdx) { | |
1629 | var first = this.layout_.setPointsOffsets[setIdx]; | |
1630 | var len = this.layout_.setPointsLengths[setIdx]; | |
1631 | for (var i = 0; i < len; ++i) { | |
1632 | var point = points[first + i]; | |
62c3d2fd | 1633 | if (!Dygraph.isValidPoint(point)) continue; |
857a6931 KW |
1634 | dx = point.canvasx - domX; |
1635 | dy = point.canvasy - domY; | |
1636 | dist = dx * dx + dy * dy; | |
81cb07d6 | 1637 | if (dist < minDist) { |
62c3d2fd | 1638 | minDist = dist; |
a937d031 KW |
1639 | closestPoint = point; |
1640 | closestSeries = setIdx; | |
1641 | idx = i; | |
1642 | } | |
857a6931 KW |
1643 | } |
1644 | } | |
1645 | var name = this.layout_.setNames[closestSeries]; | |
1646 | return { | |
81cb07d6 | 1647 | row: idx + this.getLeftBoundary_(), |
857a6931 KW |
1648 | seriesName: name, |
1649 | point: closestPoint | |
1650 | }; | |
1651 | }; | |
1652 | ||
1653 | /** | |
1654 | * Given canvas X,Y coordinates, find the touched area in a stacked graph. | |
2a02e5dd KW |
1655 | * |
1656 | * This first finds the X data point closest to the supplied DOM X coordinate, | |
1657 | * then finds the series which puts the Y coordinate on top of its filled area, | |
1658 | * using linear interpolation between adjacent point pairs. | |
1659 | * | |
857a6931 KW |
1660 | * @param {Number} domX graph-relative DOM X coordinate |
1661 | * @param {Number} domY graph-relative DOM Y coordinate | |
1662 | * Returns: {row, seriesName, point} | |
1663 | * @private | |
1664 | */ | |
1665 | Dygraph.prototype.findStackedPoint = function(domX, domY) { | |
1666 | var row = this.findClosestRow(domX); | |
81cb07d6 KW |
1667 | var boundary = this.getLeftBoundary_(); |
1668 | var rowIdx = row - boundary; | |
857a6931 KW |
1669 | var points = this.layout_.points; |
1670 | var closestPoint, closestSeries; | |
1671 | for (var setIdx = 0; setIdx < this.layout_.datasets.length; ++setIdx) { | |
1672 | var first = this.layout_.setPointsOffsets[setIdx]; | |
1673 | var len = this.layout_.setPointsLengths[setIdx]; | |
81cb07d6 KW |
1674 | if (rowIdx >= len) continue; |
1675 | var p1 = points[first + rowIdx]; | |
62c3d2fd | 1676 | if (!Dygraph.isValidPoint(p1)) continue; |
857a6931 | 1677 | var py = p1.canvasy; |
81cb07d6 | 1678 | if (domX > p1.canvasx && rowIdx + 1 < len) { |
857a6931 | 1679 | // interpolate series Y value using next point |
81cb07d6 | 1680 | var p2 = points[first + rowIdx + 1]; |
62c3d2fd KW |
1681 | if (Dygraph.isValidPoint(p2)) { |
1682 | var dx = p2.canvasx - p1.canvasx; | |
1683 | if (dx > 0) { | |
1684 | var r = (domX - p1.canvasx) / dx; | |
1685 | py += r * (p2.canvasy - p1.canvasy); | |
1686 | } | |
416b05ad | 1687 | } |
81cb07d6 | 1688 | } else if (domX < p1.canvasx && rowIdx > 0) { |
857a6931 | 1689 | // interpolate series Y value using previous point |
81cb07d6 | 1690 | var p0 = points[first + rowIdx - 1]; |
62c3d2fd KW |
1691 | if (Dygraph.isValidPoint(p0)) { |
1692 | var dx = p1.canvasx - p0.canvasx; | |
1693 | if (dx > 0) { | |
1694 | var r = (p1.canvasx - domX) / dx; | |
1695 | py += r * (p0.canvasy - p1.canvasy); | |
1696 | } | |
12e4c741 | 1697 | } |
6a1aa64f | 1698 | } |
857a6931 | 1699 | // Stop if the point (domX, py) is above this series' upper edge |
a937d031 KW |
1700 | if (setIdx == 0 || py < domY) { |
1701 | closestPoint = p1; | |
1702 | closestSeries = setIdx; | |
1703 | } | |
6a1aa64f | 1704 | } |
857a6931 KW |
1705 | var name = this.layout_.setNames[closestSeries]; |
1706 | return { | |
1707 | row: row, | |
1708 | seriesName: name, | |
1709 | point: closestPoint | |
1710 | }; | |
1711 | }; | |
6a1aa64f | 1712 | |
857a6931 | 1713 | /** |
6a1aa64f DV |
1714 | * When the mouse moves in the canvas, display information about a nearby data |
1715 | * point and draw dots over those points in the data series. This function | |
1716 | * takes care of cleanup of previously-drawn dots. | |
1717 | * @param {Object} event The mousemove event from the browser. | |
1718 | * @private | |
1719 | */ | |
285a6bda | 1720 | Dygraph.prototype.mouseMove_ = function(event) { |
e863a17d | 1721 | // This prevents JS errors when mousing over the canvas before data loads. |
4cac8c7a | 1722 | var points = this.layout_.points; |
685ebbb3 | 1723 | if (points === undefined) return; |
e863a17d | 1724 | |
857a6931 KW |
1725 | var canvasCoords = this.eventToDomCoords(event); |
1726 | var canvasx = canvasCoords[0]; | |
1727 | var canvasy = canvasCoords[1]; | |
6a1aa64f | 1728 | |
857a6931 KW |
1729 | var highlightSeriesOpts = this.attr_("highlightSeriesOpts"); |
1730 | var selectionChanged = false; | |
1731 | if (highlightSeriesOpts) { | |
1732 | var closest; | |
1733 | if (this.attr_("stackedGraph")) { | |
1734 | closest = this.findStackedPoint(canvasx, canvasy); | |
1735 | } else { | |
1736 | closest = this.findClosestPoint(canvasx, canvasy); | |
43af96e7 | 1737 | } |
857a6931 | 1738 | selectionChanged = this.setSelection(closest.row, closest.seriesName); |
416b05ad | 1739 | } else { |
857a6931 KW |
1740 | var idx = this.findClosestRow(canvasx); |
1741 | selectionChanged = this.setSelection(idx); | |
12e4c741 | 1742 | } |
43af96e7 | 1743 | |
857a6931 KW |
1744 | var callback = this.attr_("highlightCallback"); |
1745 | if (callback && selectionChanged) { | |
1746 | callback(event, this.lastx_, this.selPoints_, this.lastRow_, this.highlightSet_); | |
12e4c741 | 1747 | } |
239c712d | 1748 | }; |
b258a3da | 1749 | |
239c712d | 1750 | /** |
81cb07d6 | 1751 | * Fetch left offset from first defined boundaryIds record (see bug #236). |
e2c21500 | 1752 | * @private |
81cb07d6 KW |
1753 | */ |
1754 | Dygraph.prototype.getLeftBoundary_ = function() { | |
1755 | for (var i = 0; i < this.boundaryIds_.length; i++) { | |
1756 | if (this.boundaryIds_[i] !== undefined) { | |
1757 | return this.boundaryIds_[i][0]; | |
1758 | } | |
1759 | } | |
1760 | return 0; | |
1761 | }; | |
1762 | ||
1763 | /** | |
1903f1e4 | 1764 | * Transforms layout_.points index into data row number. |
2ddb1197 | 1765 | * @param int layout_.points index |
1903f1e4 | 1766 | * @return int row number, or -1 if none could be found. |
2ddb1197 SC |
1767 | * @private |
1768 | */ | |
1769 | Dygraph.prototype.idxToRow_ = function(idx) { | |
1903f1e4 | 1770 | if (idx < 0) return -1; |
2ddb1197 | 1771 | |
81cb07d6 | 1772 | var boundary = this.getLeftBoundary_(); |
82c6fe4d KW |
1773 | for (var setIdx = 0; setIdx < this.layout_.datasets.length; ++setIdx) { |
1774 | var set = this.layout_.datasets[setIdx]; | |
1775 | if (idx < set.length) { | |
81cb07d6 | 1776 | return boundary + idx; |
1903f1e4 | 1777 | } |
82c6fe4d | 1778 | idx -= set.length; |
1903f1e4 DV |
1779 | } |
1780 | return -1; | |
1781 | }; | |
2ddb1197 | 1782 | |
857a6931 KW |
1783 | Dygraph.prototype.animateSelection_ = function(direction) { |
1784 | var totalSteps = 10; | |
1785 | var millis = 30; | |
1d44ee5e KW |
1786 | if (this.fadeLevel === undefined) this.fadeLevel = 0; |
1787 | if (this.animateId === undefined) this.animateId = 0; | |
857a6931 KW |
1788 | var start = this.fadeLevel; |
1789 | var steps = direction < 0 ? start : totalSteps - start; | |
1790 | if (steps <= 0) { | |
1791 | if (this.fadeLevel) { | |
1792 | this.updateSelection_(1.0); | |
1793 | } | |
1794 | return; | |
1795 | } | |
1796 | ||
1797 | var thisId = ++this.animateId; | |
1798 | var that = this; | |
475f7420 KW |
1799 | Dygraph.repeatAndCleanup( |
1800 | function(n) { | |
1801 | // ignore simultaneous animations | |
1802 | if (that.animateId != thisId) return; | |
1803 | ||
1804 | that.fadeLevel += direction; | |
1805 | if (that.fadeLevel === 0) { | |
1806 | that.clearSelection(); | |
1807 | } else { | |
1808 | that.updateSelection_(that.fadeLevel / totalSteps); | |
1809 | } | |
1810 | }, | |
1811 | steps, millis, function() {}); | |
857a6931 KW |
1812 | }; |
1813 | ||
2ddb1197 | 1814 | /** |
239c712d NAG |
1815 | * Draw dots over the selectied points in the data series. This function |
1816 | * takes care of cleanup of previously-drawn dots. | |
1817 | * @private | |
1818 | */ | |
857a6931 | 1819 | Dygraph.prototype.updateSelection_ = function(opt_animFraction) { |
e2c21500 DV |
1820 | var defaultPrevented = this.cascadeEvents_('select', { |
1821 | selectedX: this.lastx_, | |
1822 | selectedPoints: this.selPoints_ | |
1823 | }); | |
1824 | // TODO(danvk): use defaultPrevented here? | |
1825 | ||
6a1aa64f | 1826 | // Clear the previously drawn vertical, if there is one |
758a629f | 1827 | var i; |
2cf95fff | 1828 | var ctx = this.canvas_ctx_; |
857a6931 KW |
1829 | if (this.attr_('highlightSeriesOpts')) { |
1830 | ctx.clearRect(0, 0, this.width_, this.height_); | |
afdb20d8 | 1831 | var alpha = 1.0 - this.attr_('highlightSeriesBackgroundAlpha'); |
857a6931 | 1832 | if (alpha) { |
2a02e5dd KW |
1833 | // Activating background fade includes an animation effect for a gradual |
1834 | // fade. TODO(klausw): make this independently configurable if it causes | |
1835 | // issues? Use a shared preference to control animations? | |
1836 | var animateBackgroundFade = true; | |
1837 | if (animateBackgroundFade) { | |
857a6931 KW |
1838 | if (opt_animFraction === undefined) { |
1839 | // start a new animation | |
1840 | this.animateSelection_(1); | |
1841 | return; | |
1842 | } | |
1843 | alpha *= opt_animFraction; | |
1844 | } | |
1845 | ctx.fillStyle = 'rgba(255,255,255,' + alpha + ')'; | |
1846 | ctx.fillRect(0, 0, this.width_, this.height_); | |
1847 | } | |
1848 | var setIdx = this.datasetIndexFromSetName_(this.highlightSet_); | |
857a6931 KW |
1849 | this.plotter_._drawLine(ctx, setIdx); |
1850 | } else if (this.previousVerticalX_ >= 0) { | |
46dde5f9 DV |
1851 | // Determine the maximum highlight circle size. |
1852 | var maxCircleSize = 0; | |
227b93cc | 1853 | var labels = this.attr_('labels'); |
758a629f | 1854 | for (i = 1; i < labels.length; i++) { |
227b93cc | 1855 | var r = this.attr_('highlightCircleSize', labels[i]); |
46dde5f9 DV |
1856 | if (r > maxCircleSize) maxCircleSize = r; |
1857 | } | |
6a1aa64f | 1858 | var px = this.previousVerticalX_; |
46dde5f9 DV |
1859 | ctx.clearRect(px - maxCircleSize - 1, 0, |
1860 | 2 * maxCircleSize + 2, this.height_); | |
6a1aa64f DV |
1861 | } |
1862 | ||
920208fb PF |
1863 | if (this.isUsingExcanvas_ && this.currentZoomRectArgs_) { |
1864 | Dygraph.prototype.drawZoomRect_.apply(this, this.currentZoomRectArgs_); | |
1865 | } | |
1866 | ||
d160cc3b | 1867 | if (this.selPoints_.length > 0) { |
6a1aa64f | 1868 | // Draw colored circles over the center of each selected point |
e9fe4a2f | 1869 | var canvasx = this.selPoints_[0].canvasx; |
43af96e7 | 1870 | ctx.save(); |
758a629f | 1871 | for (i = 0; i < this.selPoints_.length; i++) { |
e9fe4a2f DV |
1872 | var pt = this.selPoints_[i]; |
1873 | if (!Dygraph.isOK(pt.canvasy)) continue; | |
1874 | ||
1875 | var circleSize = this.attr_('highlightCircleSize', pt.name); | |
5879307d | 1876 | var callback = this.attr_("drawHighlightPointCallback", pt.name); |
a8ef67a8 | 1877 | var color = this.plotter_.colors[pt.name]; |
78e58af4 RK |
1878 | if (!callback) { |
1879 | callback = Dygraph.Circles.DEFAULT; | |
1880 | } | |
a8ef67a8 KW |
1881 | ctx.lineWidth = this.attr_('strokeWidth', pt.name); |
1882 | ctx.strokeStyle = color; | |
1883 | ctx.fillStyle = color; | |
78e58af4 | 1884 | callback(this.g, pt.name, ctx, canvasx, pt.canvasy, |
a8ef67a8 | 1885 | color, circleSize); |
6a1aa64f DV |
1886 | } |
1887 | ctx.restore(); | |
1888 | ||
1889 | this.previousVerticalX_ = canvasx; | |
1890 | } | |
1891 | }; | |
1892 | ||
1893 | /** | |
629a09ae DV |
1894 | * Manually set the selected points and display information about them in the |
1895 | * legend. The selection can be cleared using clearSelection() and queried | |
1896 | * using getSelection(). | |
1897 | * @param { Integer } row number that should be highlighted (i.e. appear with | |
1898 | * hover dots on the chart). Set to false to clear any selection. | |
857a6931 KW |
1899 | * @param { seriesName } optional series name to highlight that series with the |
1900 | * the highlightSeriesOpts setting. | |
239c712d | 1901 | */ |
857a6931 | 1902 | Dygraph.prototype.setSelection = function(row, opt_seriesName) { |
239c712d NAG |
1903 | // Extract the points we've selected |
1904 | this.selPoints_ = []; | |
1905 | var pos = 0; | |
50360fd0 | 1906 | |
239c712d | 1907 | if (row !== false) { |
81cb07d6 | 1908 | row -= this.getLeftBoundary_(); |
16269f6e | 1909 | } |
50360fd0 | 1910 | |
857a6931 | 1911 | var changed = false; |
16269f6e | 1912 | if (row !== false && row >= 0) { |
857a6931 KW |
1913 | if (row != this.lastRow_) changed = true; |
1914 | this.lastRow_ = row; | |
82c6fe4d KW |
1915 | for (var setIdx = 0; setIdx < this.layout_.datasets.length; ++setIdx) { |
1916 | var set = this.layout_.datasets[setIdx]; | |
1917 | if (row < set.length) { | |
38f33a44 | 1918 | var point = this.layout_.points[pos+row]; |
ccd9d7c2 | 1919 | |
38f33a44 | 1920 | if (this.attr_("stackedGraph")) { |
8c03ba63 | 1921 | point = this.layout_.unstackPointAtIndex(pos+row); |
38f33a44 | 1922 | } |
ccd9d7c2 | 1923 | |
04c104d7 | 1924 | if (!(point.yval === null)) this.selPoints_.push(point); |
16269f6e | 1925 | } |
82c6fe4d | 1926 | pos += set.length; |
239c712d | 1927 | } |
857a6931 KW |
1928 | } else { |
1929 | if (this.lastRow_ >= 0) changed = true; | |
1930 | this.lastRow_ = -1; | |
16269f6e | 1931 | } |
50360fd0 | 1932 | |
16269f6e | 1933 | if (this.selPoints_.length) { |
239c712d | 1934 | this.lastx_ = this.selPoints_[0].xval; |
239c712d | 1935 | } else { |
857a6931 | 1936 | this.lastx_ = -1; |
239c712d NAG |
1937 | } |
1938 | ||
857a6931 KW |
1939 | if (opt_seriesName !== undefined) { |
1940 | if (this.highlightSet_ !== opt_seriesName) changed = true; | |
1941 | this.highlightSet_ = opt_seriesName; | |
239c712d NAG |
1942 | } |
1943 | ||
857a6931 KW |
1944 | if (changed) { |
1945 | this.updateSelection_(undefined); | |
1946 | } | |
1947 | return changed; | |
239c712d NAG |
1948 | }; |
1949 | ||
1950 | /** | |
6a1aa64f DV |
1951 | * The mouse has left the canvas. Clear out whatever artifacts remain |
1952 | * @param {Object} event the mouseout event from the browser. | |
1953 | * @private | |
1954 | */ | |
285a6bda | 1955 | Dygraph.prototype.mouseOut_ = function(event) { |
a4c6a67c AV |
1956 | if (this.attr_("unhighlightCallback")) { |
1957 | this.attr_("unhighlightCallback")(event); | |
1958 | } | |
1959 | ||
43af96e7 | 1960 | if (this.attr_("hideOverlayOnMouseOut")) { |
239c712d | 1961 | this.clearSelection(); |
43af96e7 | 1962 | } |
6a1aa64f DV |
1963 | }; |
1964 | ||
239c712d | 1965 | /** |
629a09ae DV |
1966 | * Clears the current selection (i.e. points that were highlighted by moving |
1967 | * the mouse over the chart). | |
239c712d NAG |
1968 | */ |
1969 | Dygraph.prototype.clearSelection = function() { | |
e2c21500 DV |
1970 | this.cascadeEvents_('deselect', {}); |
1971 | ||
239c712d | 1972 | // Get rid of the overlay data |
857a6931 KW |
1973 | if (this.fadeLevel) { |
1974 | this.animateSelection_(-1); | |
1975 | return; | |
1976 | } | |
2cf95fff | 1977 | this.canvas_ctx_.clearRect(0, 0, this.width_, this.height_); |
857a6931 | 1978 | this.fadeLevel = 0; |
239c712d NAG |
1979 | this.selPoints_ = []; |
1980 | this.lastx_ = -1; | |
857a6931 KW |
1981 | this.lastRow_ = -1; |
1982 | this.highlightSet_ = null; | |
758a629f | 1983 | }; |
239c712d | 1984 | |
103b7292 | 1985 | /** |
629a09ae DV |
1986 | * Returns the number of the currently selected row. To get data for this row, |
1987 | * you can use the getValue method. | |
1988 | * @return { Integer } row number, or -1 if nothing is selected | |
103b7292 NAG |
1989 | */ |
1990 | Dygraph.prototype.getSelection = function() { | |
1991 | if (!this.selPoints_ || this.selPoints_.length < 1) { | |
1992 | return -1; | |
1993 | } | |
50360fd0 | 1994 | |
103b7292 NAG |
1995 | for (var row=0; row<this.layout_.points.length; row++ ) { |
1996 | if (this.layout_.points[row].x == this.selPoints_[0].x) { | |
81cb07d6 | 1997 | return row + this.getLeftBoundary_(); |
103b7292 NAG |
1998 | } |
1999 | } | |
2000 | return -1; | |
2e1fcf1a | 2001 | }; |
103b7292 | 2002 | |
e2c21500 DV |
2003 | /** |
2004 | * Returns the name of the currently-highlighted series. | |
2005 | * Only available when the highlightSeriesOpts option is in use. | |
2006 | */ | |
857a6931 KW |
2007 | Dygraph.prototype.getHighlightSeries = function() { |
2008 | return this.highlightSet_; | |
2009 | }; | |
2010 | ||
19589a3e | 2011 | /** |
6a1aa64f DV |
2012 | * Fires when there's data available to be graphed. |
2013 | * @param {String} data Raw CSV data to be plotted | |
2014 | * @private | |
2015 | */ | |
285a6bda | 2016 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f | 2017 | this.rawData_ = this.parseCSV_(data); |
26ca7938 | 2018 | this.predraw_(); |
6a1aa64f DV |
2019 | }; |
2020 | ||
6a1aa64f DV |
2021 | /** |
2022 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
2023 | * @private | |
2024 | */ | |
285a6bda | 2025 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f | 2026 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
7201b11e | 2027 | var range; |
6a1aa64f | 2028 | if (this.dateWindow_) { |
7201b11e | 2029 | range = [this.dateWindow_[0], this.dateWindow_[1]]; |
6a1aa64f | 2030 | } else { |
395e98a3 | 2031 | range = this.fullXRange_(); |
7201b11e JB |
2032 | } |
2033 | ||
48e614ac DV |
2034 | var xAxisOptionsView = this.optionsViewForAxis_('x'); |
2035 | var xTicks = xAxisOptionsView('ticker')( | |
2036 | range[0], | |
2037 | range[1], | |
2038 | this.width_, // TODO(danvk): should be area.width | |
2039 | xAxisOptionsView, | |
2040 | this); | |
2041 | // var msg = 'ticker(' + range[0] + ', ' + range[1] + ', ' + this.width_ + ', ' + this.attr_('pixelsPerXLabel') + ') -> ' + JSON.stringify(xTicks); | |
2042 | // console.log(msg); | |
b2c9222a | 2043 | this.layout_.setXTicks(xTicks); |
32988383 DV |
2044 | }; |
2045 | ||
629a09ae DV |
2046 | /** |
2047 | * @private | |
2048 | * Computes the range of the data series (including confidence intervals). | |
2049 | * @param { [Array] } series either [ [x1, y1], [x2, y2], ... ] or | |
2050 | * [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... | |
2051 | * @return [low, high] | |
2052 | */ | |
5011e7a1 | 2053 | Dygraph.prototype.extremeValues_ = function(series) { |
758a629f | 2054 | var minY = null, maxY = null, j, y; |
5011e7a1 | 2055 | |
9922b78b | 2056 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
5011e7a1 DV |
2057 | if (bars) { |
2058 | // With custom bars, maxY is the max of the high values. | |
758a629f DV |
2059 | for (j = 0; j < series.length; j++) { |
2060 | y = series[j][1][0]; | |
5011e7a1 DV |
2061 | if (!y) continue; |
2062 | var low = y - series[j][1][1]; | |
2063 | var high = y + series[j][1][2]; | |
2064 | if (low > y) low = y; // this can happen with custom bars, | |
2065 | if (high < y) high = y; // e.g. in tests/custom-bars.html | |
758a629f | 2066 | if (maxY === null || high > maxY) { |
5011e7a1 DV |
2067 | maxY = high; |
2068 | } | |
758a629f | 2069 | if (minY === null || low < minY) { |
5011e7a1 DV |
2070 | minY = low; |
2071 | } | |
2072 | } | |
2073 | } else { | |
758a629f DV |
2074 | for (j = 0; j < series.length; j++) { |
2075 | y = series[j][1]; | |
d12999d3 | 2076 | if (y === null || isNaN(y)) continue; |
758a629f | 2077 | if (maxY === null || y > maxY) { |
5011e7a1 DV |
2078 | maxY = y; |
2079 | } | |
758a629f | 2080 | if (minY === null || y < minY) { |
5011e7a1 DV |
2081 | minY = y; |
2082 | } | |
2083 | } | |
2084 | } | |
2085 | ||
2086 | return [minY, maxY]; | |
2087 | }; | |
2088 | ||
6a1aa64f | 2089 | /** |
629a09ae | 2090 | * @private |
26ca7938 DV |
2091 | * This function is called once when the chart's data is changed or the options |
2092 | * dictionary is updated. It is _not_ called when the user pans or zooms. The | |
2093 | * idea is that values derived from the chart's data can be computed here, | |
2094 | * rather than every time the chart is drawn. This includes things like the | |
2095 | * number of axes, rolling averages, etc. | |
2096 | */ | |
2097 | Dygraph.prototype.predraw_ = function() { | |
7153e001 DV |
2098 | var start = new Date(); |
2099 | ||
26ca7938 DV |
2100 | // TODO(danvk): move more computations out of drawGraph_ and into here. |
2101 | this.computeYAxes_(); | |
2102 | ||
2103 | // Create a new plotter. | |
70c80071 | 2104 | if (this.plotter_) this.plotter_.clear(); |
26ca7938 | 2105 | this.plotter_ = new DygraphCanvasRenderer(this, |
2cf95fff RK |
2106 | this.hidden_, |
2107 | this.hidden_ctx_, | |
0e23cfc6 | 2108 | this.layout_); |
26ca7938 | 2109 | |
0abfbd7e DV |
2110 | // The roller sits in the bottom left corner of the chart. We don't know where |
2111 | // this will be until the options are available, so it's positioned here. | |
8c69de65 | 2112 | this.createRollInterface_(); |
26ca7938 | 2113 | |
e2c21500 | 2114 | this.cascadeEvents_('predraw'); |
0abfbd7e | 2115 | |
ccd9d7c2 PF |
2116 | if (this.rangeSelector_) { |
2117 | this.rangeSelector_.renderStaticLayer(); | |
2118 | } | |
2119 | ||
b1a3b195 DV |
2120 | // Convert the raw data (a 2D array) into the internal format and compute |
2121 | // rolling averages. | |
2122 | this.rolledSeries_ = [null]; // x-axis is the first series and it's special | |
395e98a3 | 2123 | for (var i = 1; i < this.numColumns(); i++) { |
04c104d7 KW |
2124 | var logScale = this.attr_('logscale', i); // TODO(klausw): this looks wrong |
2125 | var series = this.extractSeries_(this.rawData_, i, logScale); | |
b1a3b195 DV |
2126 | series = this.rollingAverage(series, this.rollPeriod_); |
2127 | this.rolledSeries_.push(series); | |
2128 | } | |
2129 | ||
26ca7938 DV |
2130 | // If the data or options have changed, then we'd better redraw. |
2131 | this.drawGraph_(); | |
4b4d1a63 DV |
2132 | |
2133 | // This is used to determine whether to do various animations. | |
2134 | var end = new Date(); | |
2135 | this.drawingTimeMs_ = (end - start); | |
26ca7938 DV |
2136 | }; |
2137 | ||
2138 | /** | |
b1a3b195 DV |
2139 | * Loop over all fields and create datasets, calculating extreme y-values for |
2140 | * each series and extreme x-indices as we go. | |
fc4e84fa | 2141 | * |
b1a3b195 DV |
2142 | * dateWindow is passed in as an explicit parameter so that we can compute |
2143 | * extreme values "speculatively", i.e. without actually setting state on the | |
2144 | * dygraph. | |
fc4e84fa | 2145 | * |
b1a3b195 DV |
2146 | * TODO(danvk): make this more of a true function |
2147 | * @return [ datasets, seriesExtremes, boundaryIds ] | |
6a1aa64f DV |
2148 | * @private |
2149 | */ | |
b1a3b195 DV |
2150 | Dygraph.prototype.gatherDatasets_ = function(rolledSeries, dateWindow) { |
2151 | var boundaryIds = []; | |
354e15ab DE |
2152 | var cumulative_y = []; // For stacked series. |
2153 | var datasets = []; | |
f09fc545 | 2154 | var extremes = {}; // series name -> [low, high] |
758a629f | 2155 | var i, j, k; |
f09fc545 | 2156 | |
b1a3b195 DV |
2157 | // Loop over the fields (series). Go from the last to the first, |
2158 | // because if they're stacked that's how we accumulate the values. | |
2159 | var num_series = rolledSeries.length - 1; | |
758a629f | 2160 | for (i = num_series; i >= 1; i--) { |
1cf11047 DV |
2161 | if (!this.visibility()[i - 1]) continue; |
2162 | ||
b1a3b195 | 2163 | // TODO(danvk): is this copy really necessary? |
6a1aa64f | 2164 | var series = []; |
758a629f | 2165 | for (j = 0; j < rolledSeries[i].length; j++) { |
b1a3b195 | 2166 | series.push(rolledSeries[i][j]); |
6a1aa64f | 2167 | } |
2f5e7e1a | 2168 | |
6a1aa64f | 2169 | // Prune down to the desired range, if necessary (for zooming) |
1a26f3fb DV |
2170 | // Because there can be lines going to points outside of the visible area, |
2171 | // we actually prune to visible points, plus one on either side. | |
9922b78b | 2172 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
b1a3b195 DV |
2173 | if (dateWindow) { |
2174 | var low = dateWindow[0]; | |
2175 | var high = dateWindow[1]; | |
6a1aa64f | 2176 | var pruned = []; |
1a26f3fb DV |
2177 | // TODO(danvk): do binary search instead of linear search. |
2178 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. | |
2179 | var firstIdx = null, lastIdx = null; | |
758a629f | 2180 | for (k = 0; k < series.length; k++) { |
1a26f3fb DV |
2181 | if (series[k][0] >= low && firstIdx === null) { |
2182 | firstIdx = k; | |
2183 | } | |
2184 | if (series[k][0] <= high) { | |
2185 | lastIdx = k; | |
6a1aa64f DV |
2186 | } |
2187 | } | |
1a26f3fb DV |
2188 | if (firstIdx === null) firstIdx = 0; |
2189 | if (firstIdx > 0) firstIdx--; | |
2190 | if (lastIdx === null) lastIdx = series.length - 1; | |
2191 | if (lastIdx < series.length - 1) lastIdx++; | |
b1a3b195 | 2192 | boundaryIds[i-1] = [firstIdx, lastIdx]; |
758a629f | 2193 | for (k = firstIdx; k <= lastIdx; k++) { |
1a26f3fb | 2194 | pruned.push(series[k]); |
6a1aa64f DV |
2195 | } |
2196 | series = pruned; | |
16269f6e | 2197 | } else { |
b1a3b195 | 2198 | boundaryIds[i-1] = [0, series.length-1]; |
6a1aa64f DV |
2199 | } |
2200 | ||
f09fc545 | 2201 | var seriesExtremes = this.extremeValues_(series); |
5011e7a1 | 2202 | |
6a1aa64f | 2203 | if (bars) { |
758a629f | 2204 | for (j=0; j<series.length; j++) { |
5061b42f DV |
2205 | series[j] = [series[j][0], |
2206 | series[j][1][0], | |
2207 | series[j][1][1], | |
2208 | series[j][1][2]]; | |
354e15ab | 2209 | } |
43af96e7 | 2210 | } else if (this.attr_("stackedGraph")) { |
43af96e7 NK |
2211 | var l = series.length; |
2212 | var actual_y; | |
758a629f | 2213 | for (j = 0; j < l; j++) { |
354e15ab DE |
2214 | // If one data set has a NaN, let all subsequent stacked |
2215 | // sets inherit the NaN -- only start at 0 for the first set. | |
2216 | var x = series[j][0]; | |
41b0f691 | 2217 | if (cumulative_y[x] === undefined) { |
354e15ab | 2218 | cumulative_y[x] = 0; |
41b0f691 | 2219 | } |
43af96e7 NK |
2220 | |
2221 | actual_y = series[j][1]; | |
04c104d7 KW |
2222 | if (actual_y === null) { |
2223 | series[j] = [x, null]; | |
2224 | continue; | |
2225 | } | |
2226 | ||
354e15ab | 2227 | cumulative_y[x] += actual_y; |
43af96e7 | 2228 | |
758a629f | 2229 | series[j] = [x, cumulative_y[x]]; |
43af96e7 | 2230 | |
41b0f691 DV |
2231 | if (cumulative_y[x] > seriesExtremes[1]) { |
2232 | seriesExtremes[1] = cumulative_y[x]; | |
2233 | } | |
2234 | if (cumulative_y[x] < seriesExtremes[0]) { | |
2235 | seriesExtremes[0] = cumulative_y[x]; | |
2236 | } | |
43af96e7 | 2237 | } |
6a1aa64f | 2238 | } |
354e15ab | 2239 | |
b1a3b195 DV |
2240 | var seriesName = this.attr_("labels")[i]; |
2241 | extremes[seriesName] = seriesExtremes; | |
354e15ab | 2242 | datasets[i] = series; |
6a1aa64f DV |
2243 | } |
2244 | ||
7d463f49 KW |
2245 | // For stacked graphs, a NaN value for any point in the sum should create a |
2246 | // clean gap in the graph. Back-propagate NaNs to all points at this X value. | |
2247 | if (this.attr_("stackedGraph")) { | |
2248 | for (k = datasets.length - 1; k >= 0; --k) { | |
2249 | // Use the first nonempty dataset to get X values. | |
2250 | if (!datasets[k]) continue; | |
2251 | for (j = 0; j < datasets[k].length; j++) { | |
2252 | var x = datasets[k][j][0]; | |
2253 | if (isNaN(cumulative_y[x])) { | |
2254 | // Set all Y values to NaN at that X value. | |
2255 | for (i = datasets.length - 1; i >= 0; i--) { | |
2256 | if (!datasets[i]) continue; | |
2257 | datasets[i][j][1] = NaN; | |
2258 | } | |
2259 | } | |
2260 | } | |
2261 | break; | |
2262 | } | |
2263 | } | |
2264 | ||
b1a3b195 DV |
2265 | return [ datasets, extremes, boundaryIds ]; |
2266 | }; | |
2267 | ||
2268 | /** | |
2269 | * Update the graph with new data. This method is called when the viewing area | |
2270 | * has changed. If the underlying data or options have changed, predraw_ will | |
2271 | * be called before drawGraph_ is called. | |
2272 | * | |
b1a3b195 DV |
2273 | * @private |
2274 | */ | |
e2c21500 | 2275 | Dygraph.prototype.drawGraph_ = function() { |
b1a3b195 DV |
2276 | var start = new Date(); |
2277 | ||
b1a3b195 DV |
2278 | // This is used to set the second parameter to drawCallback, below. |
2279 | var is_initial_draw = this.is_initial_draw_; | |
2280 | this.is_initial_draw_ = false; | |
2281 | ||
b1a3b195 DV |
2282 | this.layout_.removeAllDatasets(); |
2283 | this.setColors_(); | |
758a629f | 2284 | this.attrs_.pointSize = 0.5 * this.attr_('highlightCircleSize'); |
b1a3b195 DV |
2285 | |
2286 | var packed = this.gatherDatasets_(this.rolledSeries_, this.dateWindow_); | |
2287 | var datasets = packed[0]; | |
2288 | var extremes = packed[1]; | |
2289 | this.boundaryIds_ = packed[2]; | |
2290 | ||
82c6fe4d KW |
2291 | this.setIndexByName_ = {}; |
2292 | var labels = this.attr_("labels"); | |
2293 | if (labels.length > 0) { | |
2294 | this.setIndexByName_[labels[0]] = 0; | |
2295 | } | |
857a6931 | 2296 | var dataIdx = 0; |
354e15ab | 2297 | for (var i = 1; i < datasets.length; i++) { |
82c6fe4d | 2298 | this.setIndexByName_[labels[i]] = i; |
4523c1f6 | 2299 | if (!this.visibility()[i - 1]) continue; |
82c6fe4d | 2300 | this.layout_.addDataset(labels[i], datasets[i]); |
857a6931 | 2301 | this.datasetIndex_[i] = dataIdx++; |
43af96e7 NK |
2302 | } |
2303 | ||
6faebb69 | 2304 | this.computeYAxisRanges_(extremes); |
b2c9222a DV |
2305 | this.layout_.setYAxes(this.axes_); |
2306 | ||
6a1aa64f DV |
2307 | this.addXTicks_(); |
2308 | ||
b2c9222a | 2309 | // Save the X axis zoomed status as the updateOptions call will tend to set it erroneously |
81856f70 | 2310 | var tmp_zoomed_x = this.zoomed_x_; |
6a1aa64f | 2311 | // Tell PlotKit to use this new data and render itself |
b2c9222a | 2312 | this.layout_.setDateWindow(this.dateWindow_); |
81856f70 | 2313 | this.zoomed_x_ = tmp_zoomed_x; |
6a1aa64f | 2314 | this.layout_.evaluateWithError(); |
e2c21500 | 2315 | this.renderGraph_(is_initial_draw); |
9ca829f2 DV |
2316 | |
2317 | if (this.attr_("timingName")) { | |
2318 | var end = new Date(); | |
2319 | if (console) { | |
758a629f | 2320 | console.log(this.attr_("timingName") + " - drawGraph: " + (end - start) + "ms"); |
9ca829f2 DV |
2321 | } |
2322 | } | |
2323 | }; | |
2324 | ||
e2c21500 DV |
2325 | /** |
2326 | * This does the work of drawing the chart. It assumes that the layout and axis | |
2327 | * scales have already been set (e.g. by predraw_). | |
2328 | * | |
2329 | * @private | |
2330 | */ | |
2331 | Dygraph.prototype.renderGraph_ = function(is_initial_draw) { | |
6a1aa64f DV |
2332 | this.plotter_.clear(); |
2333 | this.plotter_.render(); | |
f6401bf6 | 2334 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
2f5e7e1a | 2335 | this.canvas_.height); |
599fb4ad | 2336 | |
4a0cb9c4 | 2337 | // Generate a static legend before any particular point is selected. |
2fccd3dc | 2338 | |
ccd9d7c2 PF |
2339 | if (this.rangeSelector_) { |
2340 | this.rangeSelector_.renderInteractiveLayer(); | |
2341 | } | |
2342 | ||
e2c21500 | 2343 | this.cascadeEvents_('drawChart'); |
599fb4ad | 2344 | if (this.attr_("drawCallback") !== null) { |
fe0b7c03 | 2345 | this.attr_("drawCallback")(this, is_initial_draw); |
599fb4ad | 2346 | } |
6a1aa64f DV |
2347 | }; |
2348 | ||
2349 | /** | |
629a09ae | 2350 | * @private |
26ca7938 DV |
2351 | * Determine properties of the y-axes which are independent of the data |
2352 | * currently being displayed. This includes things like the number of axes and | |
2353 | * the style of the axes. It does not include the range of each axis and its | |
2354 | * tick marks. | |
2355 | * This fills in this.axes_ and this.seriesToAxisMap_. | |
2356 | * axes_ = [ { options } ] | |
2357 | * seriesToAxisMap_ = { seriesName: 0, seriesName2: 1, ... } | |
2358 | * indices are into the axes_ array. | |
f09fc545 | 2359 | */ |
26ca7938 | 2360 | Dygraph.prototype.computeYAxes_ = function() { |
d64b8fea RK |
2361 | // Preserve valueWindow settings if they exist, and if the user hasn't |
2362 | // specified a new valueRange. | |
4dd0ac55 | 2363 | var i, valueWindows, seriesName, axis, index, opts, v; |
758a629f | 2364 | if (this.axes_ !== undefined && this.user_attrs_.hasOwnProperty("valueRange") === false) { |
d64b8fea | 2365 | valueWindows = []; |
758a629f | 2366 | for (index = 0; index < this.axes_.length; index++) { |
d64b8fea RK |
2367 | valueWindows.push(this.axes_[index].valueWindow); |
2368 | } | |
2369 | } | |
2370 | ||
00aa7f61 | 2371 | this.axes_ = [{ yAxisId : 0, g : this }]; // always have at least one y-axis. |
26ca7938 DV |
2372 | this.seriesToAxisMap_ = {}; |
2373 | ||
2374 | // Get a list of series names. | |
2375 | var labels = this.attr_("labels"); | |
1c77a3a1 | 2376 | var series = {}; |
758a629f | 2377 | for (i = 1; i < labels.length; i++) series[labels[i]] = (i - 1); |
f09fc545 DV |
2378 | |
2379 | // all options which could be applied per-axis: | |
2380 | var axisOptions = [ | |
2381 | 'includeZero', | |
2382 | 'valueRange', | |
2383 | 'labelsKMB', | |
2384 | 'labelsKMG2', | |
2385 | 'pixelsPerYLabel', | |
2386 | 'yAxisLabelWidth', | |
2387 | 'axisLabelFontSize', | |
7d0e7a0d RK |
2388 | 'axisTickSize', |
2389 | 'logscale' | |
f09fc545 DV |
2390 | ]; |
2391 | ||
2392 | // Copy global axis options over to the first axis. | |
758a629f | 2393 | for (i = 0; i < axisOptions.length; i++) { |
f09fc545 | 2394 | var k = axisOptions[i]; |
4dd0ac55 | 2395 | v = this.attr_(k); |
26ca7938 | 2396 | if (v) this.axes_[0][k] = v; |
f09fc545 DV |
2397 | } |
2398 | ||
2399 | // Go through once and add all the axes. | |
758a629f | 2400 | for (seriesName in series) { |
26ca7938 | 2401 | if (!series.hasOwnProperty(seriesName)) continue; |
758a629f DV |
2402 | axis = this.attr_("axis", seriesName); |
2403 | if (axis === null) { | |
26ca7938 | 2404 | this.seriesToAxisMap_[seriesName] = 0; |
f09fc545 DV |
2405 | continue; |
2406 | } | |
2407 | if (typeof(axis) == 'object') { | |
2408 | // Add a new axis, making a copy of its per-axis options. | |
4dd0ac55 | 2409 | opts = {}; |
26ca7938 | 2410 | Dygraph.update(opts, this.axes_[0]); |
f09fc545 | 2411 | Dygraph.update(opts, { valueRange: null }); // shouldn't inherit this. |
00aa7f61 RK |
2412 | var yAxisId = this.axes_.length; |
2413 | opts.yAxisId = yAxisId; | |
2414 | opts.g = this; | |
f09fc545 | 2415 | Dygraph.update(opts, axis); |
26ca7938 | 2416 | this.axes_.push(opts); |
00aa7f61 | 2417 | this.seriesToAxisMap_[seriesName] = yAxisId; |
f09fc545 DV |
2418 | } |
2419 | } | |
2420 | ||
2421 | // Go through one more time and assign series to an axis defined by another | |
2422 | // series, e.g. { 'Y1: { axis: {} }, 'Y2': { axis: 'Y1' } } | |
758a629f | 2423 | for (seriesName in series) { |
26ca7938 | 2424 | if (!series.hasOwnProperty(seriesName)) continue; |
758a629f | 2425 | axis = this.attr_("axis", seriesName); |
f09fc545 | 2426 | if (typeof(axis) == 'string') { |
26ca7938 | 2427 | if (!this.seriesToAxisMap_.hasOwnProperty(axis)) { |
f09fc545 DV |
2428 | this.error("Series " + seriesName + " wants to share a y-axis with " + |
2429 | "series " + axis + ", which does not define its own axis."); | |
2430 | return null; | |
2431 | } | |
26ca7938 DV |
2432 | var idx = this.seriesToAxisMap_[axis]; |
2433 | this.seriesToAxisMap_[seriesName] = idx; | |
f09fc545 DV |
2434 | } |
2435 | } | |
1c77a3a1 | 2436 | |
758a629f | 2437 | if (valueWindows !== undefined) { |
d64b8fea | 2438 | // Restore valueWindow settings. |
758a629f | 2439 | for (index = 0; index < valueWindows.length; index++) { |
d64b8fea RK |
2440 | this.axes_[index].valueWindow = valueWindows[index]; |
2441 | } | |
2442 | } | |
4dd0ac55 RV |
2443 | |
2444 | // New axes options | |
2445 | for (axis = 0; axis < this.axes_.length; axis++) { | |
2446 | if (axis === 0) { | |
2447 | opts = this.optionsViewForAxis_('y' + (axis ? '2' : '')); | |
2448 | v = opts("valueRange"); | |
2449 | if (v) this.axes_[axis].valueRange = v; | |
2450 | } else { // To keep old behavior | |
2451 | var axes = this.user_attrs_.axes; | |
2452 | if (axes && axes.y2) { | |
2453 | v = axes.y2.valueRange; | |
2454 | if (v) this.axes_[axis].valueRange = v; | |
2455 | } | |
2456 | } | |
2457 | } | |
2458 | ||
26ca7938 DV |
2459 | }; |
2460 | ||
2461 | /** | |
2462 | * Returns the number of y-axes on the chart. | |
2463 | * @return {Number} the number of axes. | |
2464 | */ | |
2465 | Dygraph.prototype.numAxes = function() { | |
2466 | var last_axis = 0; | |
2467 | for (var series in this.seriesToAxisMap_) { | |
2468 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; | |
2469 | var idx = this.seriesToAxisMap_[series]; | |
2470 | if (idx > last_axis) last_axis = idx; | |
2471 | } | |
2472 | return 1 + last_axis; | |
2473 | }; | |
2474 | ||
2475 | /** | |
629a09ae | 2476 | * @private |
b2c9222a DV |
2477 | * Returns axis properties for the given series. |
2478 | * @param { String } setName The name of the series for which to get axis | |
2479 | * properties, e.g. 'Y1'. | |
2480 | * @return { Object } The axis properties. | |
2481 | */ | |
2482 | Dygraph.prototype.axisPropertiesForSeries = function(series) { | |
2483 | // TODO(danvk): handle errors. | |
2484 | return this.axes_[this.seriesToAxisMap_[series]]; | |
2485 | }; | |
2486 | ||
2487 | /** | |
2488 | * @private | |
26ca7938 DV |
2489 | * Determine the value range and tick marks for each axis. |
2490 | * @param {Object} extremes A mapping from seriesName -> [low, high] | |
2491 | * This fills in the valueRange and ticks fields in each entry of this.axes_. | |
2492 | */ | |
2493 | Dygraph.prototype.computeYAxisRanges_ = function(extremes) { | |
2494 | // Build a map from axis number -> [list of series names] | |
758a629f DV |
2495 | var seriesForAxis = [], series; |
2496 | for (series in this.seriesToAxisMap_) { | |
26ca7938 DV |
2497 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; |
2498 | var idx = this.seriesToAxisMap_[series]; | |
2499 | while (seriesForAxis.length <= idx) seriesForAxis.push([]); | |
2500 | seriesForAxis[idx].push(series); | |
2501 | } | |
f09fc545 DV |
2502 | |
2503 | // Compute extreme values, a span and tick marks for each axis. | |
26ca7938 DV |
2504 | for (var i = 0; i < this.axes_.length; i++) { |
2505 | var axis = this.axes_[i]; | |
25f76ae3 | 2506 | |
06fc69b6 AV |
2507 | if (!seriesForAxis[i]) { |
2508 | // If no series are defined or visible then use a reasonable default | |
2509 | axis.extremeRange = [0, 1]; | |
2510 | } else { | |
1c77a3a1 | 2511 | // Calculate the extremes of extremes. |
758a629f | 2512 | series = seriesForAxis[i]; |
f09fc545 DV |
2513 | var minY = Infinity; // extremes[series[0]][0]; |
2514 | var maxY = -Infinity; // extremes[series[0]][1]; | |
ba049b89 | 2515 | var extremeMinY, extremeMaxY; |
a2da3777 | 2516 | |
f09fc545 | 2517 | for (var j = 0; j < series.length; j++) { |
a2da3777 DV |
2518 | // this skips invisible series |
2519 | if (!extremes.hasOwnProperty(series[j])) continue; | |
2520 | ||
ba049b89 NN |
2521 | // Only use valid extremes to stop null data series' from corrupting the scale. |
2522 | extremeMinY = extremes[series[j]][0]; | |
758a629f | 2523 | if (extremeMinY !== null) { |
36dfa958 | 2524 | minY = Math.min(extremeMinY, minY); |
ba049b89 NN |
2525 | } |
2526 | extremeMaxY = extremes[series[j]][1]; | |
758a629f | 2527 | if (extremeMaxY !== null) { |
36dfa958 | 2528 | maxY = Math.max(extremeMaxY, maxY); |
ba049b89 | 2529 | } |
f09fc545 DV |
2530 | } |
2531 | if (axis.includeZero && minY > 0) minY = 0; | |
2532 | ||
a2da3777 | 2533 | // Ensure we have a valid scale, otherwise default to [0, 1] for safety. |
36dfa958 | 2534 | if (minY == Infinity) minY = 0; |
a2da3777 | 2535 | if (maxY == -Infinity) maxY = 1; |
ba049b89 | 2536 | |
f09fc545 DV |
2537 | // Add some padding and round up to an integer to be human-friendly. |
2538 | var span = maxY - minY; | |
2539 | // special case: if we have no sense of scale, use +/-10% of the sole value. | |
758a629f | 2540 | if (span === 0) { span = maxY; } |
f09fc545 | 2541 | |
758a629f | 2542 | var maxAxisY, minAxisY; |
7d0e7a0d | 2543 | if (axis.logscale) { |
758a629f DV |
2544 | maxAxisY = maxY + 0.1 * span; |
2545 | minAxisY = minY; | |
ff022deb | 2546 | } else { |
758a629f DV |
2547 | maxAxisY = maxY + 0.1 * span; |
2548 | minAxisY = minY - 0.1 * span; | |
f09fc545 | 2549 | |
ff022deb RK |
2550 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. |
2551 | if (!this.attr_("avoidMinZero")) { | |
2552 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; | |
2553 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
2554 | } | |
f09fc545 | 2555 | |
ff022deb RK |
2556 | if (this.attr_("includeZero")) { |
2557 | if (maxY < 0) maxAxisY = 0; | |
2558 | if (minY > 0) minAxisY = 0; | |
2559 | } | |
f09fc545 | 2560 | } |
4cac8c7a RK |
2561 | axis.extremeRange = [minAxisY, maxAxisY]; |
2562 | } | |
2563 | if (axis.valueWindow) { | |
2564 | // This is only set if the user has zoomed on the y-axis. It is never set | |
2565 | // by a user. It takes precedence over axis.valueRange because, if you set | |
2566 | // valueRange, you'd still expect to be able to pan. | |
2567 | axis.computedValueRange = [axis.valueWindow[0], axis.valueWindow[1]]; | |
2568 | } else if (axis.valueRange) { | |
2569 | // This is a user-set value range for this axis. | |
2570 | axis.computedValueRange = [axis.valueRange[0], axis.valueRange[1]]; | |
2571 | } else { | |
2572 | axis.computedValueRange = axis.extremeRange; | |
f09fc545 DV |
2573 | } |
2574 | ||
0d64e596 DV |
2575 | // Add ticks. By default, all axes inherit the tick positions of the |
2576 | // primary axis. However, if an axis is specifically marked as having | |
2577 | // independent ticks, then that is permissible as well. | |
48e614ac DV |
2578 | var opts = this.optionsViewForAxis_('y' + (i ? '2' : '')); |
2579 | var ticker = opts('ticker'); | |
758a629f | 2580 | if (i === 0 || axis.independentTicks) { |
48e614ac DV |
2581 | axis.ticks = ticker(axis.computedValueRange[0], |
2582 | axis.computedValueRange[1], | |
2583 | this.height_, // TODO(danvk): should be area.height | |
2584 | opts, | |
2585 | this); | |
0d64e596 DV |
2586 | } else { |
2587 | var p_axis = this.axes_[0]; | |
2588 | var p_ticks = p_axis.ticks; | |
2589 | var p_scale = p_axis.computedValueRange[1] - p_axis.computedValueRange[0]; | |
2590 | var scale = axis.computedValueRange[1] - axis.computedValueRange[0]; | |
2591 | var tick_values = []; | |
25f76ae3 DV |
2592 | for (var k = 0; k < p_ticks.length; k++) { |
2593 | var y_frac = (p_ticks[k].v - p_axis.computedValueRange[0]) / p_scale; | |
0d64e596 DV |
2594 | var y_val = axis.computedValueRange[0] + y_frac * scale; |
2595 | tick_values.push(y_val); | |
2596 | } | |
2597 | ||
48e614ac DV |
2598 | axis.ticks = ticker(axis.computedValueRange[0], |
2599 | axis.computedValueRange[1], | |
2600 | this.height_, // TODO(danvk): should be area.height | |
2601 | opts, | |
2602 | this, | |
2603 | tick_values); | |
0d64e596 | 2604 | } |
f09fc545 | 2605 | } |
f09fc545 | 2606 | }; |
25f76ae3 | 2607 | |
f09fc545 | 2608 | /** |
b1a3b195 DV |
2609 | * Extracts one series from the raw data (a 2D array) into an array of (date, |
2610 | * value) tuples. | |
2611 | * | |
2612 | * This is where undesirable points (i.e. negative values on log scales and | |
2613 | * missing values through which we wish to connect lines) are dropped. | |
2614 | * | |
2615 | * @private | |
2616 | */ | |
04c104d7 | 2617 | Dygraph.prototype.extractSeries_ = function(rawData, i, logScale) { |
b1a3b195 DV |
2618 | var series = []; |
2619 | for (var j = 0; j < rawData.length; j++) { | |
2620 | var x = rawData[j][0]; | |
2621 | var point = rawData[j][i]; | |
2622 | if (logScale) { | |
2623 | // On the log scale, points less than zero do not exist. | |
04c104d7 | 2624 | // This will create a gap in the chart. |
b1a3b195 DV |
2625 | if (point <= 0) { |
2626 | point = null; | |
2627 | } | |
b1a3b195 | 2628 | } |
04c104d7 | 2629 | series.push([x, point]); |
b1a3b195 DV |
2630 | } |
2631 | return series; | |
2632 | }; | |
2633 | ||
2634 | /** | |
629a09ae | 2635 | * @private |
6a1aa64f DV |
2636 | * Calculates the rolling average of a data set. |
2637 | * If originalData is [label, val], rolls the average of those. | |
2638 | * If originalData is [label, [, it's interpreted as [value, stddev] | |
2639 | * and the roll is returned in the same form, with appropriately reduced | |
2640 | * stddev for each value. | |
2641 | * Note that this is where fractional input (i.e. '5/10') is converted into | |
2642 | * decimal values. | |
2643 | * @param {Array} originalData The data in the appropriate format (see above) | |
6faebb69 JB |
2644 | * @param {Number} rollPeriod The number of points over which to average the |
2645 | * data | |
6a1aa64f | 2646 | */ |
285a6bda | 2647 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
6a1aa64f DV |
2648 | if (originalData.length < 2) |
2649 | return originalData; | |
758a629f | 2650 | rollPeriod = Math.min(rollPeriod, originalData.length); |
6a1aa64f | 2651 | var rollingData = []; |
285a6bda | 2652 | var sigma = this.attr_("sigma"); |
6a1aa64f | 2653 | |
758a629f | 2654 | var low, high, i, j, y, sum, num_ok, stddev; |
6a1aa64f DV |
2655 | if (this.fractions_) { |
2656 | var num = 0; | |
2657 | var den = 0; // numerator/denominator | |
2658 | var mult = 100.0; | |
758a629f | 2659 | for (i = 0; i < originalData.length; i++) { |
6a1aa64f DV |
2660 | num += originalData[i][1][0]; |
2661 | den += originalData[i][1][1]; | |
2662 | if (i - rollPeriod >= 0) { | |
2663 | num -= originalData[i - rollPeriod][1][0]; | |
2664 | den -= originalData[i - rollPeriod][1][1]; | |
2665 | } | |
2666 | ||
2667 | var date = originalData[i][0]; | |
2668 | var value = den ? num / den : 0.0; | |
285a6bda | 2669 | if (this.attr_("errorBars")) { |
395e98a3 | 2670 | if (this.attr_("wilsonInterval")) { |
6a1aa64f DV |
2671 | // For more details on this confidence interval, see: |
2672 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval | |
2673 | if (den) { | |
2674 | var p = value < 0 ? 0 : value, n = den; | |
2675 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); | |
2676 | var denom = 1 + sigma * sigma / den; | |
758a629f DV |
2677 | low = (p + sigma * sigma / (2 * den) - pm) / denom; |
2678 | high = (p + sigma * sigma / (2 * den) + pm) / denom; | |
6a1aa64f DV |
2679 | rollingData[i] = [date, |
2680 | [p * mult, (p - low) * mult, (high - p) * mult]]; | |
2681 | } else { | |
2682 | rollingData[i] = [date, [0, 0, 0]]; | |
2683 | } | |
2684 | } else { | |
758a629f | 2685 | stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; |
6a1aa64f DV |
2686 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; |
2687 | } | |
2688 | } else { | |
2689 | rollingData[i] = [date, mult * value]; | |
2690 | } | |
2691 | } | |
9922b78b | 2692 | } else if (this.attr_("customBars")) { |
758a629f | 2693 | low = 0; |
f6885d6a | 2694 | var mid = 0; |
758a629f | 2695 | high = 0; |
f6885d6a | 2696 | var count = 0; |
758a629f | 2697 | for (i = 0; i < originalData.length; i++) { |
6a1aa64f | 2698 | var data = originalData[i][1]; |
758a629f | 2699 | y = data[1]; |
6a1aa64f | 2700 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; |
f6885d6a | 2701 | |
758a629f | 2702 | if (y !== null && !isNaN(y)) { |
49a7d0d5 DV |
2703 | low += data[0]; |
2704 | mid += y; | |
2705 | high += data[2]; | |
2706 | count += 1; | |
2707 | } | |
f6885d6a DV |
2708 | if (i - rollPeriod >= 0) { |
2709 | var prev = originalData[i - rollPeriod]; | |
758a629f | 2710 | if (prev[1][1] !== null && !isNaN(prev[1][1])) { |
49a7d0d5 DV |
2711 | low -= prev[1][0]; |
2712 | mid -= prev[1][1]; | |
2713 | high -= prev[1][2]; | |
2714 | count -= 1; | |
2715 | } | |
f6885d6a | 2716 | } |
502d5996 DV |
2717 | if (count) { |
2718 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, | |
2719 | 1.0 * (mid - low) / count, | |
2720 | 1.0 * (high - mid) / count ]]; | |
2721 | } else { | |
2722 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
2723 | } | |
2769de62 | 2724 | } |
6a1aa64f DV |
2725 | } else { |
2726 | // Calculate the rolling average for the first rollPeriod - 1 points where | |
6faebb69 | 2727 | // there is not enough data to roll over the full number of points |
285a6bda | 2728 | if (!this.attr_("errorBars")){ |
5011e7a1 DV |
2729 | if (rollPeriod == 1) { |
2730 | return originalData; | |
2731 | } | |
2732 | ||
758a629f DV |
2733 | for (i = 0; i < originalData.length; i++) { |
2734 | sum = 0; | |
2735 | num_ok = 0; | |
2736 | for (j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { | |
2737 | y = originalData[j][1]; | |
2738 | if (y === null || isNaN(y)) continue; | |
5011e7a1 | 2739 | num_ok++; |
2847c1cf | 2740 | sum += originalData[j][1]; |
6a1aa64f | 2741 | } |
5011e7a1 | 2742 | if (num_ok) { |
2847c1cf | 2743 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
5011e7a1 | 2744 | } else { |
2847c1cf | 2745 | rollingData[i] = [originalData[i][0], null]; |
5011e7a1 | 2746 | } |
6a1aa64f | 2747 | } |
2847c1cf DV |
2748 | |
2749 | } else { | |
758a629f DV |
2750 | for (i = 0; i < originalData.length; i++) { |
2751 | sum = 0; | |
6a1aa64f | 2752 | var variance = 0; |
758a629f DV |
2753 | num_ok = 0; |
2754 | for (j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { | |
2755 | y = originalData[j][1][0]; | |
2756 | if (y === null || isNaN(y)) continue; | |
5011e7a1 | 2757 | num_ok++; |
6a1aa64f DV |
2758 | sum += originalData[j][1][0]; |
2759 | variance += Math.pow(originalData[j][1][1], 2); | |
2760 | } | |
5011e7a1 | 2761 | if (num_ok) { |
758a629f | 2762 | stddev = Math.sqrt(variance) / num_ok; |
5011e7a1 DV |
2763 | rollingData[i] = [originalData[i][0], |
2764 | [sum / num_ok, sigma * stddev, sigma * stddev]]; | |
2765 | } else { | |
2766 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
2767 | } | |
6a1aa64f DV |
2768 | } |
2769 | } | |
2770 | } | |
2771 | ||
2772 | return rollingData; | |
2773 | }; | |
2774 | ||
2775 | /** | |
285a6bda DV |
2776 | * Detects the type of the str (date or numeric) and sets the various |
2777 | * formatting attributes in this.attrs_ based on this type. | |
2778 | * @param {String} str An x value. | |
2779 | * @private | |
2780 | */ | |
2781 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
2782 | var isDate = false; | |
0842b24b DV |
2783 | var dashPos = str.indexOf('-'); // could be 2006-01-01 _or_ 1.0e-2 |
2784 | if ((dashPos > 0 && (str[dashPos-1] != 'e' && str[dashPos-1] != 'E')) || | |
285a6bda DV |
2785 | str.indexOf('/') >= 0 || |
2786 | isNaN(parseFloat(str))) { | |
2787 | isDate = true; | |
2788 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
2789 | // TODO(danvk): remove support for this format. | |
2790 | isDate = true; | |
2791 | } | |
2792 | ||
2793 | if (isDate) { | |
285a6bda | 2794 | this.attrs_.xValueParser = Dygraph.dateParser; |
48e614ac DV |
2795 | this.attrs_.axes.x.valueFormatter = Dygraph.dateString_; |
2796 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; | |
2797 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisFormatter; | |
285a6bda | 2798 | } else { |
c39e1d93 | 2799 | /** @private (shut up, jsdoc!) */ |
285a6bda | 2800 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
48e614ac DV |
2801 | // TODO(danvk): use Dygraph.numberValueFormatter here? |
2802 | /** @private (shut up, jsdoc!) */ | |
2803 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; | |
44462ba3 | 2804 | this.attrs_.axes.x.ticker = Dygraph.numericLinearTicks; |
48e614ac | 2805 | this.attrs_.axes.x.axisLabelFormatter = this.attrs_.axes.x.valueFormatter; |
6a1aa64f | 2806 | } |
6a1aa64f DV |
2807 | }; |
2808 | ||
2809 | /** | |
5cd7ac68 DV |
2810 | * Parses the value as a floating point number. This is like the parseFloat() |
2811 | * built-in, but with a few differences: | |
2812 | * - the empty string is parsed as null, rather than NaN. | |
2813 | * - if the string cannot be parsed at all, an error is logged. | |
2814 | * If the string can't be parsed, this method returns null. | |
2815 | * @param {String} x The string to be parsed | |
2816 | * @param {Number} opt_line_no The line number from which the string comes. | |
2817 | * @param {String} opt_line The text of the line from which the string comes. | |
2818 | * @private | |
2819 | */ | |
2820 | ||
2821 | // Parse the x as a float or return null if it's not a number. | |
2822 | Dygraph.prototype.parseFloat_ = function(x, opt_line_no, opt_line) { | |
2823 | var val = parseFloat(x); | |
2824 | if (!isNaN(val)) return val; | |
2825 | ||
2826 | // Try to figure out what happeend. | |
2827 | // If the value is the empty string, parse it as null. | |
2828 | if (/^ *$/.test(x)) return null; | |
2829 | ||
2830 | // If it was actually "NaN", return it as NaN. | |
2831 | if (/^ *nan *$/i.test(x)) return NaN; | |
2832 | ||
2833 | // Looks like a parsing error. | |
2834 | var msg = "Unable to parse '" + x + "' as a number"; | |
2835 | if (opt_line !== null && opt_line_no !== null) { | |
2836 | msg += " on line " + (1+opt_line_no) + " ('" + opt_line + "') of CSV."; | |
2837 | } | |
2838 | this.error(msg); | |
2839 | ||
2840 | return null; | |
2841 | }; | |
2842 | ||
2843 | /** | |
629a09ae | 2844 | * @private |
6a1aa64f DV |
2845 | * Parses a string in a special csv format. We expect a csv file where each |
2846 | * line is a date point, and the first field in each line is the date string. | |
2847 | * We also expect that all remaining fields represent series. | |
285a6bda | 2848 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f | 2849 | * date, series1, stddev1, series2, stddev2, ... |
629a09ae | 2850 | * @param {[Object]} data See above. |
285a6bda | 2851 | * |
629a09ae | 2852 | * @return [Object] An array with one entry for each row. These entries |
285a6bda DV |
2853 | * are an array of cells in that row. The first entry is the parsed x-value for |
2854 | * the row. The second, third, etc. are the y-values. These can take on one of | |
2855 | * three forms, depending on the CSV and constructor parameters: | |
2856 | * 1. numeric value | |
2857 | * 2. [ value, stddev ] | |
2858 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 2859 | */ |
285a6bda | 2860 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f DV |
2861 | var ret = []; |
2862 | var lines = data.split("\n"); | |
758a629f | 2863 | var vals, j; |
3d67f03b DV |
2864 | |
2865 | // Use the default delimiter or fall back to a tab if that makes sense. | |
2866 | var delim = this.attr_('delimiter'); | |
2867 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { | |
2868 | delim = '\t'; | |
2869 | } | |
2870 | ||
285a6bda | 2871 | var start = 0; |
d7beab6b DV |
2872 | if (!('labels' in this.user_attrs_)) { |
2873 | // User hasn't explicitly set labels, so they're (presumably) in the CSV. | |
285a6bda | 2874 | start = 1; |
d7beab6b | 2875 | this.attrs_.labels = lines[0].split(delim); // NOTE: _not_ user_attrs_. |
6a1aa64f | 2876 | } |
5cd7ac68 | 2877 | var line_no = 0; |
03b522a4 | 2878 | |
285a6bda DV |
2879 | var xParser; |
2880 | var defaultParserSet = false; // attempt to auto-detect x value type | |
2881 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 2882 | var outOfOrder = false; |
6a1aa64f DV |
2883 | for (var i = start; i < lines.length; i++) { |
2884 | var line = lines[i]; | |
5cd7ac68 | 2885 | line_no = i; |
758a629f | 2886 | if (line.length === 0) continue; // skip blank lines |
3d67f03b DV |
2887 | if (line[0] == '#') continue; // skip comment lines |
2888 | var inFields = line.split(delim); | |
285a6bda | 2889 | if (inFields.length < 2) continue; |
6a1aa64f DV |
2890 | |
2891 | var fields = []; | |
285a6bda DV |
2892 | if (!defaultParserSet) { |
2893 | this.detectTypeFromString_(inFields[0]); | |
2894 | xParser = this.attr_("xValueParser"); | |
2895 | defaultParserSet = true; | |
2896 | } | |
2897 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
2898 | |
2899 | // If fractions are expected, parse the numbers as "A/B" | |
2900 | if (this.fractions_) { | |
758a629f | 2901 | for (j = 1; j < inFields.length; j++) { |
6a1aa64f | 2902 | // TODO(danvk): figure out an appropriate way to flag parse errors. |
758a629f | 2903 | vals = inFields[j].split("/"); |
7219edb3 DV |
2904 | if (vals.length != 2) { |
2905 | this.error('Expected fractional "num/den" values in CSV data ' + | |
2906 | "but found a value '" + inFields[j] + "' on line " + | |
2907 | (1 + i) + " ('" + line + "') which is not of this form."); | |
2908 | fields[j] = [0, 0]; | |
2909 | } else { | |
2910 | fields[j] = [this.parseFloat_(vals[0], i, line), | |
2911 | this.parseFloat_(vals[1], i, line)]; | |
2912 | } | |
6a1aa64f | 2913 | } |
285a6bda | 2914 | } else if (this.attr_("errorBars")) { |
6a1aa64f | 2915 | // If there are error bars, values are (value, stddev) pairs |
7219edb3 DV |
2916 | if (inFields.length % 2 != 1) { |
2917 | this.error('Expected alternating (value, stdev.) pairs in CSV data ' + | |
2918 | 'but line ' + (1 + i) + ' has an odd number of values (' + | |
2919 | (inFields.length - 1) + "): '" + line + "'"); | |
2920 | } | |
758a629f | 2921 | for (j = 1; j < inFields.length; j += 2) { |
5cd7ac68 DV |
2922 | fields[(j + 1) / 2] = [this.parseFloat_(inFields[j], i, line), |
2923 | this.parseFloat_(inFields[j + 1], i, line)]; | |
7219edb3 | 2924 | } |
9922b78b | 2925 | } else if (this.attr_("customBars")) { |
6a1aa64f | 2926 | // Bars are a low;center;high tuple |
758a629f | 2927 | for (j = 1; j < inFields.length; j++) { |
327a9279 DV |
2928 | var val = inFields[j]; |
2929 | if (/^ *$/.test(val)) { | |
2930 | fields[j] = [null, null, null]; | |
2931 | } else { | |
758a629f | 2932 | vals = val.split(";"); |
327a9279 DV |
2933 | if (vals.length == 3) { |
2934 | fields[j] = [ this.parseFloat_(vals[0], i, line), | |
2935 | this.parseFloat_(vals[1], i, line), | |
2936 | this.parseFloat_(vals[2], i, line) ]; | |
2937 | } else { | |
1a5dc2af RK |
2938 | this.warn('When using customBars, values must be either blank ' + |
2939 | 'or "low;center;high" tuples (got "' + val + | |
2940 | '" on line ' + (1+i)); | |
327a9279 DV |
2941 | } |
2942 | } | |
6a1aa64f DV |
2943 | } |
2944 | } else { | |
2945 | // Values are just numbers | |
758a629f | 2946 | for (j = 1; j < inFields.length; j++) { |
5cd7ac68 | 2947 | fields[j] = this.parseFloat_(inFields[j], i, line); |
285a6bda | 2948 | } |
6a1aa64f | 2949 | } |
987840a2 DV |
2950 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
2951 | outOfOrder = true; | |
2952 | } | |
285a6bda DV |
2953 | |
2954 | if (fields.length != expectedCols) { | |
2955 | this.error("Number of columns in line " + i + " (" + fields.length + | |
2956 | ") does not agree with number of labels (" + expectedCols + | |
2957 | ") " + line); | |
2958 | } | |
6d0aaa09 DV |
2959 | |
2960 | // If the user specified the 'labels' option and none of the cells of the | |
2961 | // first row parsed correctly, then they probably double-specified the | |
2962 | // labels. We go with the values set in the option, discard this row and | |
2963 | // log a warning to the JS console. | |
758a629f | 2964 | if (i === 0 && this.attr_('labels')) { |
6d0aaa09 | 2965 | var all_null = true; |
758a629f | 2966 | for (j = 0; all_null && j < fields.length; j++) { |
6d0aaa09 DV |
2967 | if (fields[j]) all_null = false; |
2968 | } | |
2969 | if (all_null) { | |
2970 | this.warn("The dygraphs 'labels' option is set, but the first row of " + | |
2971 | "CSV data ('" + line + "') appears to also contain labels. " + | |
2972 | "Will drop the CSV labels and use the option labels."); | |
2973 | continue; | |
2974 | } | |
2975 | } | |
2976 | ret.push(fields); | |
6a1aa64f | 2977 | } |
987840a2 DV |
2978 | |
2979 | if (outOfOrder) { | |
2980 | this.warn("CSV is out of order; order it correctly to speed loading."); | |
758a629f | 2981 | ret.sort(function(a,b) { return a[0] - b[0]; }); |
987840a2 DV |
2982 | } |
2983 | ||
6a1aa64f DV |
2984 | return ret; |
2985 | }; | |
2986 | ||
2987 | /** | |
629a09ae | 2988 | * @private |
285a6bda DV |
2989 | * The user has provided their data as a pre-packaged JS array. If the x values |
2990 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
2991 | * are dates, we need to convert them from Date objects to ms since epoch. | |
629a09ae DV |
2992 | * @param {[Object]} data |
2993 | * @return {[Object]} data with numeric x values. | |
285a6bda DV |
2994 | */ |
2995 | Dygraph.prototype.parseArray_ = function(data) { | |
2996 | // Peek at the first x value to see if it's numeric. | |
758a629f | 2997 | if (data.length === 0) { |
285a6bda DV |
2998 | this.error("Can't plot empty data set"); |
2999 | return null; | |
3000 | } | |
758a629f | 3001 | if (data[0].length === 0) { |
285a6bda DV |
3002 | this.error("Data set cannot contain an empty row"); |
3003 | return null; | |
3004 | } | |
3005 | ||
758a629f DV |
3006 | var i; |
3007 | if (this.attr_("labels") === null) { | |
285a6bda DV |
3008 | this.warn("Using default labels. Set labels explicitly via 'labels' " + |
3009 | "in the options parameter"); | |
3010 | this.attrs_.labels = [ "X" ]; | |
758a629f | 3011 | for (i = 1; i < data[0].length; i++) { |
285a6bda DV |
3012 | this.attrs_.labels.push("Y" + i); |
3013 | } | |
3014 | } | |
3015 | ||
2dda3850 | 3016 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda | 3017 | // Some intelligent defaults for a date x-axis. |
48e614ac DV |
3018 | this.attrs_.axes.x.valueFormatter = Dygraph.dateString_; |
3019 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisFormatter; | |
3020 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; | |
285a6bda DV |
3021 | |
3022 | // Assume they're all dates. | |
e3ab7b40 | 3023 | var parsedData = Dygraph.clone(data); |
758a629f DV |
3024 | for (i = 0; i < data.length; i++) { |
3025 | if (parsedData[i].length === 0) { | |
a323ff4a | 3026 | this.error("Row " + (1 + i) + " of data is empty"); |
285a6bda DV |
3027 | return null; |
3028 | } | |
758a629f DV |
3029 | if (parsedData[i][0] === null || |
3030 | typeof(parsedData[i][0].getTime) != 'function' || | |
3031 | isNaN(parsedData[i][0].getTime())) { | |
be96a1f5 | 3032 | this.error("x value in row " + (1 + i) + " is not a Date"); |
285a6bda DV |
3033 | return null; |
3034 | } | |
3035 | parsedData[i][0] = parsedData[i][0].getTime(); | |
3036 | } | |
3037 | return parsedData; | |
3038 | } else { | |
3039 | // Some intelligent defaults for a numeric x-axis. | |
c39e1d93 | 3040 | /** @private (shut up, jsdoc!) */ |
48e614ac DV |
3041 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; |
3042 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.numberAxisLabelFormatter; | |
44462ba3 | 3043 | this.attrs_.axes.x.ticker = Dygraph.numericLinearTicks; |
285a6bda DV |
3044 | return data; |
3045 | } | |
3046 | }; | |
3047 | ||
3048 | /** | |
79420a1e DV |
3049 | * Parses a DataTable object from gviz. |
3050 | * The data is expected to have a first column that is either a date or a | |
3051 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
3052 | * between this.xValueParser_ and the type of the first column, it will be | |
a685723c | 3053 | * fixed. Fills out rawData_. |
629a09ae | 3054 | * @param {[Object]} data See above. |
79420a1e DV |
3055 | * @private |
3056 | */ | |
285a6bda | 3057 | Dygraph.prototype.parseDataTable_ = function(data) { |
5829af3d | 3058 | var shortTextForAnnotationNum = function(num) { |
3059 | // converts [0-9]+ [A-Z][a-z]* | |
3060 | // example: 0=A, 1=B, 25=Z, 26=Aa, 27=Ab | |
3061 | // and continues like.. Ba Bb .. Za .. Zz..Aaa...Zzz Aaaa Zzzz | |
3062 | var shortText = String.fromCharCode(65 /* A */ + num % 26); | |
3063 | num = Math.floor(num / 26); | |
3064 | while ( num > 0 ) { | |
3065 | shortText = String.fromCharCode(65 /* A */ + (num - 1) % 26 ) + shortText.toLowerCase(); | |
3066 | num = Math.floor((num - 1) / 26); | |
3067 | } | |
3068 | return shortText; | |
3069 | } | |
3070 | ||
79420a1e DV |
3071 | var cols = data.getNumberOfColumns(); |
3072 | var rows = data.getNumberOfRows(); | |
3073 | ||
d955e223 | 3074 | var indepType = data.getColumnType(0); |
4440f6c8 | 3075 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda | 3076 | this.attrs_.xValueParser = Dygraph.dateParser; |
48e614ac DV |
3077 | this.attrs_.axes.x.valueFormatter = Dygraph.dateString_; |
3078 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; | |
3079 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisFormatter; | |
33127159 | 3080 | } else if (indepType == 'number') { |
285a6bda | 3081 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
48e614ac | 3082 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; |
44462ba3 | 3083 | this.attrs_.axes.x.ticker = Dygraph.numericLinearTicks; |
48e614ac | 3084 | this.attrs_.axes.x.axisLabelFormatter = this.attrs_.axes.x.valueFormatter; |
285a6bda | 3085 | } else { |
987840a2 DV |
3086 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
3087 | "column 1 of DataTable input (Got '" + indepType + "')"); | |
79420a1e DV |
3088 | return null; |
3089 | } | |
3090 | ||
a685723c DV |
3091 | // Array of the column indices which contain data (and not annotations). |
3092 | var colIdx = []; | |
3093 | var annotationCols = {}; // data index -> [annotation cols] | |
3094 | var hasAnnotations = false; | |
758a629f DV |
3095 | var i, j; |
3096 | for (i = 1; i < cols; i++) { | |
a685723c DV |
3097 | var type = data.getColumnType(i); |
3098 | if (type == 'number') { | |
3099 | colIdx.push(i); | |
3100 | } else if (type == 'string' && this.attr_('displayAnnotations')) { | |
3101 | // This is OK -- it's an annotation column. | |
3102 | var dataIdx = colIdx[colIdx.length - 1]; | |
3103 | if (!annotationCols.hasOwnProperty(dataIdx)) { | |
3104 | annotationCols[dataIdx] = [i]; | |
3105 | } else { | |
3106 | annotationCols[dataIdx].push(i); | |
3107 | } | |
3108 | hasAnnotations = true; | |
3109 | } else { | |
3110 | this.error("Only 'number' is supported as a dependent type with Gviz." + | |
3111 | " 'string' is only supported if displayAnnotations is true"); | |
3112 | } | |
3113 | } | |
3114 | ||
3115 | // Read column labels | |
3116 | // TODO(danvk): add support back for errorBars | |
3117 | var labels = [data.getColumnLabel(0)]; | |
758a629f | 3118 | for (i = 0; i < colIdx.length; i++) { |
a685723c | 3119 | labels.push(data.getColumnLabel(colIdx[i])); |
f9348814 | 3120 | if (this.attr_("errorBars")) i += 1; |
a685723c DV |
3121 | } |
3122 | this.attrs_.labels = labels; | |
3123 | cols = labels.length; | |
3124 | ||
79420a1e | 3125 | var ret = []; |
987840a2 | 3126 | var outOfOrder = false; |
a685723c | 3127 | var annotations = []; |
758a629f | 3128 | for (i = 0; i < rows; i++) { |
79420a1e | 3129 | var row = []; |
debe4434 DV |
3130 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
3131 | data.getValue(i, 0) === null) { | |
129569a5 FD |
3132 | this.warn("Ignoring row " + i + |
3133 | " of DataTable because of undefined or null first column."); | |
debe4434 DV |
3134 | continue; |
3135 | } | |
3136 | ||
c21d2c2d | 3137 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
3138 | row.push(data.getValue(i, 0).getTime()); |
3139 | } else { | |
3140 | row.push(data.getValue(i, 0)); | |
3141 | } | |
3e3f84e4 | 3142 | if (!this.attr_("errorBars")) { |
758a629f | 3143 | for (j = 0; j < colIdx.length; j++) { |
a685723c DV |
3144 | var col = colIdx[j]; |
3145 | row.push(data.getValue(i, col)); | |
3146 | if (hasAnnotations && | |
3147 | annotationCols.hasOwnProperty(col) && | |
758a629f | 3148 | data.getValue(i, annotationCols[col][0]) !== null) { |
a685723c DV |
3149 | var ann = {}; |
3150 | ann.series = data.getColumnLabel(col); | |
3151 | ann.xval = row[0]; | |
5829af3d | 3152 | ann.shortText = shortTextForAnnotationNum(annotations.length); |
a685723c DV |
3153 | ann.text = ''; |
3154 | for (var k = 0; k < annotationCols[col].length; k++) { | |
3155 | if (k) ann.text += "\n"; | |
3156 | ann.text += data.getValue(i, annotationCols[col][k]); | |
3157 | } | |
3158 | annotations.push(ann); | |
3159 | } | |
3e3f84e4 | 3160 | } |
92fd68d8 DV |
3161 | |
3162 | // Strip out infinities, which give dygraphs problems later on. | |
758a629f | 3163 | for (j = 0; j < row.length; j++) { |
92fd68d8 DV |
3164 | if (!isFinite(row[j])) row[j] = null; |
3165 | } | |
3e3f84e4 | 3166 | } else { |
758a629f | 3167 | for (j = 0; j < cols - 1; j++) { |
3e3f84e4 DV |
3168 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); |
3169 | } | |
79420a1e | 3170 | } |
987840a2 DV |
3171 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
3172 | outOfOrder = true; | |
3173 | } | |
243d96e8 | 3174 | ret.push(row); |
79420a1e | 3175 | } |
987840a2 DV |
3176 | |
3177 | if (outOfOrder) { | |
3178 | this.warn("DataTable is out of order; order it correctly to speed loading."); | |
758a629f | 3179 | ret.sort(function(a,b) { return a[0] - b[0]; }); |
987840a2 | 3180 | } |
a685723c DV |
3181 | this.rawData_ = ret; |
3182 | ||
3183 | if (annotations.length > 0) { | |
3184 | this.setAnnotations(annotations, true); | |
3185 | } | |
758a629f | 3186 | }; |
79420a1e | 3187 | |
629a09ae | 3188 | /** |
6a1aa64f DV |
3189 | * Get the CSV data. If it's in a function, call that function. If it's in a |
3190 | * file, do an XMLHttpRequest to get it. | |
3191 | * @private | |
3192 | */ | |
285a6bda | 3193 | Dygraph.prototype.start_ = function() { |
36d4fabf RK |
3194 | var data = this.file_; |
3195 | ||
3196 | // Functions can return references of all other types. | |
3197 | if (typeof data == 'function') { | |
3198 | data = data(); | |
3199 | } | |
3200 | ||
3201 | if (Dygraph.isArrayLike(data)) { | |
3202 | this.rawData_ = this.parseArray_(data); | |
26ca7938 | 3203 | this.predraw_(); |
36d4fabf RK |
3204 | } else if (typeof data == 'object' && |
3205 | typeof data.getColumnRange == 'function') { | |
79420a1e | 3206 | // must be a DataTable from gviz. |
36d4fabf | 3207 | this.parseDataTable_(data); |
26ca7938 | 3208 | this.predraw_(); |
36d4fabf | 3209 | } else if (typeof data == 'string') { |
285a6bda | 3210 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. |
36d4fabf RK |
3211 | if (data.indexOf('\n') >= 0) { |
3212 | this.loadedEvent_(data); | |
285a6bda DV |
3213 | } else { |
3214 | var req = new XMLHttpRequest(); | |
3215 | var caller = this; | |
3216 | req.onreadystatechange = function () { | |
3217 | if (req.readyState == 4) { | |
758a629f DV |
3218 | if (req.status === 200 || // Normal http |
3219 | req.status === 0) { // Chrome w/ --allow-file-access-from-files | |
285a6bda DV |
3220 | caller.loadedEvent_(req.responseText); |
3221 | } | |
6a1aa64f | 3222 | } |
285a6bda | 3223 | }; |
6a1aa64f | 3224 | |
36d4fabf | 3225 | req.open("GET", data, true); |
285a6bda DV |
3226 | req.send(null); |
3227 | } | |
3228 | } else { | |
36d4fabf | 3229 | this.error("Unknown data format: " + (typeof data)); |
6a1aa64f DV |
3230 | } |
3231 | }; | |
3232 | ||
3233 | /** | |
3234 | * Changes various properties of the graph. These can include: | |
3235 | * <ul> | |
3236 | * <li>file: changes the source data for the graph</li> | |
3237 | * <li>errorBars: changes whether the data contains stddev</li> | |
3238 | * </ul> | |
dcb25130 | 3239 | * |
ccfcc169 DV |
3240 | * There's a huge variety of options that can be passed to this method. For a |
3241 | * full list, see http://dygraphs.com/options.html. | |
3242 | * | |
6a1aa64f | 3243 | * @param {Object} attrs The new properties and values |
ccfcc169 DV |
3244 | * @param {Boolean} [block_redraw] Usually the chart is redrawn after every |
3245 | * call to updateOptions(). If you know better, you can pass true to explicitly | |
3246 | * block the redraw. This can be useful for chaining updateOptions() calls, | |
3247 | * avoiding the occasional infinite loop and preventing redraws when it's not | |
3248 | * necessary (e.g. when updating a callback). | |
6a1aa64f | 3249 | */ |
48e614ac | 3250 | Dygraph.prototype.updateOptions = function(input_attrs, block_redraw) { |
ccfcc169 DV |
3251 | if (typeof(block_redraw) == 'undefined') block_redraw = false; |
3252 | ||
48e614ac | 3253 | // mapLegacyOptions_ drops the "file" parameter as a convenience to us. |
758a629f | 3254 | var file = input_attrs.file; |
48e614ac DV |
3255 | var attrs = Dygraph.mapLegacyOptions_(input_attrs); |
3256 | ||
ccfcc169 | 3257 | // TODO(danvk): this is a mess. Move these options into attr_. |
c65f2303 | 3258 | if ('rollPeriod' in attrs) { |
6a1aa64f DV |
3259 | this.rollPeriod_ = attrs.rollPeriod; |
3260 | } | |
c65f2303 | 3261 | if ('dateWindow' in attrs) { |
6a1aa64f | 3262 | this.dateWindow_ = attrs.dateWindow; |
e5152598 | 3263 | if (!('isZoomedIgnoreProgrammaticZoom' in attrs)) { |
758a629f | 3264 | this.zoomed_x_ = (attrs.dateWindow !== null); |
81856f70 | 3265 | } |
b7e5862d | 3266 | } |
e5152598 | 3267 | if ('valueRange' in attrs && !('isZoomedIgnoreProgrammaticZoom' in attrs)) { |
758a629f | 3268 | this.zoomed_y_ = (attrs.valueRange !== null); |
6a1aa64f | 3269 | } |
450fe64b DV |
3270 | |
3271 | // TODO(danvk): validate per-series options. | |
46dde5f9 DV |
3272 | // Supported: |
3273 | // strokeWidth | |
3274 | // pointSize | |
3275 | // drawPoints | |
3276 | // highlightCircleSize | |
450fe64b | 3277 | |
9ca829f2 DV |
3278 | // Check if this set options will require new points. |
3279 | var requiresNewPoints = Dygraph.isPixelChangingOptionList(this.attr_("labels"), attrs); | |
3280 | ||
48e614ac | 3281 | Dygraph.updateDeep(this.user_attrs_, attrs); |
285a6bda | 3282 | |
48e614ac DV |
3283 | if (file) { |
3284 | this.file_ = file; | |
ccfcc169 | 3285 | if (!block_redraw) this.start_(); |
6a1aa64f | 3286 | } else { |
9ca829f2 DV |
3287 | if (!block_redraw) { |
3288 | if (requiresNewPoints) { | |
48e614ac | 3289 | this.predraw_(); |
9ca829f2 | 3290 | } else { |
e2c21500 | 3291 | this.renderGraph_(false); |
9ca829f2 DV |
3292 | } |
3293 | } | |
6a1aa64f DV |
3294 | } |
3295 | }; | |
3296 | ||
3297 | /** | |
48e614ac DV |
3298 | * Returns a copy of the options with deprecated names converted into current |
3299 | * names. Also drops the (potentially-large) 'file' attribute. If the caller is | |
3300 | * interested in that, they should save a copy before calling this. | |
3301 | * @private | |
3302 | */ | |
3303 | Dygraph.mapLegacyOptions_ = function(attrs) { | |
3304 | var my_attrs = {}; | |
3305 | for (var k in attrs) { | |
3306 | if (k == 'file') continue; | |
3307 | if (attrs.hasOwnProperty(k)) my_attrs[k] = attrs[k]; | |
3308 | } | |
3309 | ||
3310 | var set = function(axis, opt, value) { | |
3311 | if (!my_attrs.axes) my_attrs.axes = {}; | |
3312 | if (!my_attrs.axes[axis]) my_attrs.axes[axis] = {}; | |
3313 | my_attrs.axes[axis][opt] = value; | |
3314 | }; | |
3315 | var map = function(opt, axis, new_opt) { | |
3316 | if (typeof(attrs[opt]) != 'undefined') { | |
3317 | set(axis, new_opt, attrs[opt]); | |
3318 | delete my_attrs[opt]; | |
3319 | } | |
3320 | }; | |
3321 | ||
3322 | // This maps, e.g., xValueFormater -> axes: { x: { valueFormatter: ... } } | |
3323 | map('xValueFormatter', 'x', 'valueFormatter'); | |
3324 | map('pixelsPerXLabel', 'x', 'pixelsPerLabel'); | |
3325 | map('xAxisLabelFormatter', 'x', 'axisLabelFormatter'); | |
3326 | map('xTicker', 'x', 'ticker'); | |
3327 | map('yValueFormatter', 'y', 'valueFormatter'); | |
3328 | map('pixelsPerYLabel', 'y', 'pixelsPerLabel'); | |
3329 | map('yAxisLabelFormatter', 'y', 'axisLabelFormatter'); | |
3330 | map('yTicker', 'y', 'ticker'); | |
3331 | return my_attrs; | |
3332 | }; | |
3333 | ||
3334 | /** | |
697e70b2 DV |
3335 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
3336 | * containing div (which has presumably changed size since the dygraph was | |
3337 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
3338 | * |
3339 | * This is far more efficient than destroying and re-instantiating a | |
3340 | * Dygraph, since it doesn't have to reparse the underlying data. | |
3341 | * | |
629a09ae DV |
3342 | * @param {Number} [width] Width (in pixels) |
3343 | * @param {Number} [height] Height (in pixels) | |
697e70b2 DV |
3344 | */ |
3345 | Dygraph.prototype.resize = function(width, height) { | |
e8c7ef86 DV |
3346 | if (this.resize_lock) { |
3347 | return; | |
3348 | } | |
3349 | this.resize_lock = true; | |
3350 | ||
697e70b2 DV |
3351 | if ((width === null) != (height === null)) { |
3352 | this.warn("Dygraph.resize() should be called with zero parameters or " + | |
3353 | "two non-NULL parameters. Pretending it was zero."); | |
3354 | width = height = null; | |
3355 | } | |
3356 | ||
4b4d1a63 DV |
3357 | var old_width = this.width_; |
3358 | var old_height = this.height_; | |
b16e6369 | 3359 | |
697e70b2 DV |
3360 | if (width) { |
3361 | this.maindiv_.style.width = width + "px"; | |
3362 | this.maindiv_.style.height = height + "px"; | |
3363 | this.width_ = width; | |
3364 | this.height_ = height; | |
3365 | } else { | |
ccd9d7c2 PF |
3366 | this.width_ = this.maindiv_.clientWidth; |
3367 | this.height_ = this.maindiv_.clientHeight; | |
697e70b2 DV |
3368 | } |
3369 | ||
4b4d1a63 DV |
3370 | if (old_width != this.width_ || old_height != this.height_) { |
3371 | // TODO(danvk): there should be a clear() method. | |
3372 | this.maindiv_.innerHTML = ""; | |
77b5e09d | 3373 | this.roller_ = null; |
4b4d1a63 DV |
3374 | this.attrs_.labelsDiv = null; |
3375 | this.createInterface_(); | |
c9faeafd DV |
3376 | if (this.annotations_.length) { |
3377 | // createInterface_ reset the layout, so we need to do this. | |
3378 | this.layout_.setAnnotations(this.annotations_); | |
3379 | } | |
4b4d1a63 DV |
3380 | this.predraw_(); |
3381 | } | |
e8c7ef86 DV |
3382 | |
3383 | this.resize_lock = false; | |
697e70b2 DV |
3384 | }; |
3385 | ||
3386 | /** | |
6faebb69 | 3387 | * Adjusts the number of points in the rolling average. Updates the graph to |
6a1aa64f | 3388 | * reflect the new averaging period. |
6faebb69 | 3389 | * @param {Number} length Number of points over which to average the data. |
6a1aa64f | 3390 | */ |
285a6bda | 3391 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f | 3392 | this.rollPeriod_ = length; |
26ca7938 | 3393 | this.predraw_(); |
6a1aa64f | 3394 | }; |
540d00f1 | 3395 | |
f8cfec73 | 3396 | /** |
1cf11047 DV |
3397 | * Returns a boolean array of visibility statuses. |
3398 | */ | |
3399 | Dygraph.prototype.visibility = function() { | |
3400 | // Do lazy-initialization, so that this happens after we know the number of | |
3401 | // data series. | |
3402 | if (!this.attr_("visibility")) { | |
758a629f | 3403 | this.attrs_.visibility = []; |
1cf11047 | 3404 | } |
758a629f | 3405 | // TODO(danvk): it looks like this could go into an infinite loop w/ user_attrs. |
395e98a3 | 3406 | while (this.attr_("visibility").length < this.numColumns() - 1) { |
758a629f | 3407 | this.attrs_.visibility.push(true); |
1cf11047 DV |
3408 | } |
3409 | return this.attr_("visibility"); | |
3410 | }; | |
3411 | ||
3412 | /** | |
3413 | * Changes the visiblity of a series. | |
3414 | */ | |
3415 | Dygraph.prototype.setVisibility = function(num, value) { | |
3416 | var x = this.visibility(); | |
a6c109c1 | 3417 | if (num < 0 || num >= x.length) { |
1cf11047 DV |
3418 | this.warn("invalid series number in setVisibility: " + num); |
3419 | } else { | |
3420 | x[num] = value; | |
26ca7938 | 3421 | this.predraw_(); |
1cf11047 DV |
3422 | } |
3423 | }; | |
3424 | ||
3425 | /** | |
0cb9bd91 DV |
3426 | * How large of an area will the dygraph render itself in? |
3427 | * This is used for testing. | |
3428 | * @return A {width: w, height: h} object. | |
3429 | * @private | |
3430 | */ | |
3431 | Dygraph.prototype.size = function() { | |
3432 | return { width: this.width_, height: this.height_ }; | |
3433 | }; | |
3434 | ||
3435 | /** | |
5c528fa2 | 3436 | * Update the list of annotations and redraw the chart. |
41ee764f DV |
3437 | * See dygraphs.com/annotations.html for more info on how to use annotations. |
3438 | * @param ann {Array} An array of annotation objects. | |
3439 | * @param suppressDraw {Boolean} Set to "true" to block chart redraw (optional). | |
5c528fa2 | 3440 | */ |
a685723c | 3441 | Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { |
3c51ab74 DV |
3442 | // Only add the annotation CSS rule once we know it will be used. |
3443 | Dygraph.addAnnotationRule(); | |
5c528fa2 DV |
3444 | this.annotations_ = ann; |
3445 | this.layout_.setAnnotations(this.annotations_); | |
a685723c | 3446 | if (!suppressDraw) { |
26ca7938 | 3447 | this.predraw_(); |
a685723c | 3448 | } |
5c528fa2 DV |
3449 | }; |
3450 | ||
3451 | /** | |
3452 | * Return the list of annotations. | |
3453 | */ | |
3454 | Dygraph.prototype.annotations = function() { | |
3455 | return this.annotations_; | |
3456 | }; | |
3457 | ||
46dde5f9 | 3458 | /** |
82c6fe4d KW |
3459 | * Get the list of label names for this graph. The first column is the |
3460 | * x-axis, so the data series names start at index 1. | |
3461 | */ | |
e2c21500 | 3462 | Dygraph.prototype.getLabels = function() { |
82c6fe4d KW |
3463 | return this.attr_("labels").slice(); |
3464 | }; | |
3465 | ||
3466 | /** | |
46dde5f9 DV |
3467 | * Get the index of a series (column) given its name. The first column is the |
3468 | * x-axis, so the data series start with index 1. | |
3469 | */ | |
3470 | Dygraph.prototype.indexFromSetName = function(name) { | |
82c6fe4d | 3471 | return this.setIndexByName_[name]; |
46dde5f9 DV |
3472 | }; |
3473 | ||
629a09ae | 3474 | /** |
857a6931 KW |
3475 | * Get the internal dataset index given its name. These are numbered starting from 0, |
3476 | * and only count visible sets. | |
3477 | * @private | |
3478 | */ | |
3479 | Dygraph.prototype.datasetIndexFromSetName_ = function(name) { | |
3480 | return this.datasetIndex_[this.indexFromSetName(name)]; | |
3481 | }; | |
3482 | ||
3483 | /** | |
629a09ae DV |
3484 | * @private |
3485 | * Adds a default style for the annotation CSS classes to the document. This is | |
3486 | * only executed when annotations are actually used. It is designed to only be | |
3487 | * called once -- all calls after the first will return immediately. | |
3488 | */ | |
5c528fa2 DV |
3489 | Dygraph.addAnnotationRule = function() { |
3490 | if (Dygraph.addedAnnotationCSS) return; | |
3491 | ||
5c528fa2 DV |
3492 | var rule = "border: 1px solid black; " + |
3493 | "background-color: white; " + | |
3494 | "text-align: center;"; | |
22186871 DV |
3495 | |
3496 | var styleSheetElement = document.createElement("style"); | |
3497 | styleSheetElement.type = "text/css"; | |
3498 | document.getElementsByTagName("head")[0].appendChild(styleSheetElement); | |
3499 | ||
3500 | // Find the first style sheet that we can access. | |
3501 | // We may not add a rule to a style sheet from another domain for security | |
3502 | // reasons. This sometimes comes up when using gviz, since the Google gviz JS | |
3503 | // adds its own style sheets from google.com. | |
3504 | for (var i = 0; i < document.styleSheets.length; i++) { | |
3505 | if (document.styleSheets[i].disabled) continue; | |
3506 | var mysheet = document.styleSheets[i]; | |
3507 | try { | |
3508 | if (mysheet.insertRule) { // Firefox | |
3509 | var idx = mysheet.cssRules ? mysheet.cssRules.length : 0; | |
3510 | mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", idx); | |
3511 | } else if (mysheet.addRule) { // IE | |
3512 | mysheet.addRule(".dygraphDefaultAnnotation", rule); | |
3513 | } | |
3514 | Dygraph.addedAnnotationCSS = true; | |
3515 | return; | |
3516 | } catch(err) { | |
3517 | // Was likely a security exception. | |
3518 | } | |
5c528fa2 DV |
3519 | } |
3520 | ||
22186871 | 3521 | this.warn("Unable to add default annotation CSS rule; display may be off."); |
758a629f | 3522 | }; |
5c528fa2 | 3523 | |
285a6bda | 3524 | // Older pages may still use this name. |
c0f54d4f | 3525 | var DateGraph = Dygraph; |