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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 | ||
5c528fa2 DV |
291 | // Used for initializing annotation CSS rules only once. |
292 | Dygraph.addedAnnotationCSS = false; | |
293 | ||
285a6bda DV |
294 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { |
295 | // Labels is no longer a constructor parameter, since it's typically set | |
296 | // directly from the data source. It also conains a name for the x-axis, | |
297 | // which the previous constructor form did not. | |
758a629f | 298 | if (labels !== null) { |
285a6bda DV |
299 | var new_labels = ["Date"]; |
300 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); | |
fc80a396 | 301 | Dygraph.update(attrs, { 'labels': new_labels }); |
285a6bda DV |
302 | } |
303 | this.__init__(div, file, attrs); | |
8e4a6af3 DV |
304 | }; |
305 | ||
6a1aa64f | 306 | /** |
285a6bda | 307 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
7aedf6fe | 308 | * and context <canvas> inside of it. See the constructor for details. |
6a1aa64f | 309 | * on the parameters. |
12e4c741 | 310 | * @param {Element} div the Element to render the graph into. |
6a1aa64f | 311 | * @param {String | Function} file Source data |
6a1aa64f DV |
312 | * @param {Object} attrs Miscellaneous other options |
313 | * @private | |
314 | */ | |
285a6bda | 315 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
a2c8fff4 DV |
316 | // Hack for IE: if we're using excanvas and the document hasn't finished |
317 | // loading yet (and hence may not have initialized whatever it needs to | |
318 | // initialize), then keep calling this routine periodically until it has. | |
319 | if (/MSIE/.test(navigator.userAgent) && !window.opera && | |
320 | typeof(G_vmlCanvasManager) != 'undefined' && | |
321 | document.readyState != 'complete') { | |
322 | var self = this; | |
758a629f | 323 | setTimeout(function() { self.__init__(div, file, attrs); }, 100); |
ccd9d7c2 | 324 | return; |
a2c8fff4 DV |
325 | } |
326 | ||
285a6bda | 327 | // Support two-argument constructor |
758a629f | 328 | if (attrs === null || attrs === undefined) { attrs = {}; } |
285a6bda | 329 | |
48e614ac DV |
330 | attrs = Dygraph.mapLegacyOptions_(attrs); |
331 | ||
332 | if (!div) { | |
333 | Dygraph.error("Constructing dygraph with a non-existent div!"); | |
334 | return; | |
335 | } | |
336 | ||
920208fb PF |
337 | this.isUsingExcanvas_ = typeof(G_vmlCanvasManager) != 'undefined'; |
338 | ||
6a1aa64f | 339 | // Copy the important bits into the object |
32988383 | 340 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
6a1aa64f | 341 | this.maindiv_ = div; |
6a1aa64f | 342 | this.file_ = file; |
285a6bda | 343 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
6a1aa64f | 344 | this.previousVerticalX_ = -1; |
6a1aa64f | 345 | this.fractions_ = attrs.fractions || false; |
6a1aa64f | 346 | this.dateWindow_ = attrs.dateWindow || null; |
8b83c6cc | 347 | |
fe0b7c03 | 348 | this.is_initial_draw_ = true; |
5c528fa2 | 349 | this.annotations_ = []; |
7aedf6fe | 350 | |
45f2c689 | 351 | // Zoomed indicators - These indicate when the graph has been zoomed and on what axis. |
57baab03 NN |
352 | this.zoomed_x_ = false; |
353 | this.zoomed_y_ = false; | |
45f2c689 | 354 | |
f7d6278e DV |
355 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
356 | // div, then only one will be drawn. | |
357 | div.innerHTML = ""; | |
358 | ||
0cb9bd91 DV |
359 | // For historical reasons, the 'width' and 'height' options trump all CSS |
360 | // rules _except_ for an explicit 'width' or 'height' on the div. | |
361 | // As an added convenience, if the div has zero height (like <div></div> does | |
362 | // without any styles), then we use a default height/width. | |
758a629f | 363 | if (div.style.width === '' && attrs.width) { |
0cb9bd91 | 364 | div.style.width = attrs.width + "px"; |
285a6bda | 365 | } |
758a629f | 366 | if (div.style.height === '' && attrs.height) { |
0cb9bd91 | 367 | div.style.height = attrs.height + "px"; |
32988383 | 368 | } |
758a629f | 369 | if (div.style.height === '' && div.clientHeight === 0) { |
0cb9bd91 | 370 | div.style.height = Dygraph.DEFAULT_HEIGHT + "px"; |
758a629f | 371 | if (div.style.width === '') { |
0cb9bd91 DV |
372 | div.style.width = Dygraph.DEFAULT_WIDTH + "px"; |
373 | } | |
c21d2c2d | 374 | } |
fffad740 | 375 | // these will be zero if the dygraph's div is hidden. |
ccd9d7c2 PF |
376 | this.width_ = div.clientWidth; |
377 | this.height_ = div.clientHeight; | |
32988383 | 378 | |
344ba8c0 | 379 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
758a629f DV |
380 | if (attrs.stackedGraph) { |
381 | attrs.fillGraph = true; | |
43af96e7 NK |
382 | // TODO(nikhilk): Add any other stackedGraph checks here. |
383 | } | |
384 | ||
285a6bda DV |
385 | // Dygraphs has many options, some of which interact with one another. |
386 | // To keep track of everything, we maintain two sets of options: | |
387 | // | |
c21d2c2d | 388 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
389 | // this.attrs_ defaults, options derived from user_attrs_, data. |
390 | // | |
391 | // Options are then accessed this.attr_('attr'), which first looks at | |
392 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
393 | // defaults without overriding behavior that the user specifically asks for. | |
394 | this.user_attrs_ = {}; | |
fc80a396 | 395 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 396 | |
48e614ac | 397 | // This sequence ensures that Dygraph.DEFAULT_ATTRS is never modified. |
285a6bda | 398 | this.attrs_ = {}; |
48e614ac | 399 | Dygraph.updateDeep(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 400 | |
16269f6e | 401 | this.boundaryIds_ = []; |
82c6fe4d | 402 | this.setIndexByName_ = {}; |
857a6931 | 403 | this.datasetIndex_ = []; |
6a1aa64f | 404 | |
6a1aa64f DV |
405 | // Create the containing DIV and other interactive elements |
406 | this.createInterface_(); | |
407 | ||
738fc797 | 408 | this.start_(); |
6a1aa64f DV |
409 | }; |
410 | ||
dcb25130 NN |
411 | /** |
412 | * Returns the zoomed status of the chart for one or both axes. | |
413 | * | |
414 | * Axis is an optional parameter. Can be set to 'x' or 'y'. | |
415 | * | |
416 | * The zoomed status for an axis is set whenever a user zooms using the mouse | |
e5152598 | 417 | * or when the dateWindow or valueRange are updated (unless the isZoomedIgnoreProgrammaticZoom |
dcb25130 NN |
418 | * option is also specified). |
419 | */ | |
57baab03 | 420 | Dygraph.prototype.isZoomed = function(axis) { |
94ea5744 | 421 | if (axis == null) return this.zoomed_x_ || this.zoomed_y_; |
758a629f DV |
422 | if (axis === 'x') return this.zoomed_x_; |
423 | if (axis === 'y') return this.zoomed_y_; | |
94ea5744 | 424 | throw "axis parameter is [" + axis + "] must be null, 'x' or 'y'."; |
57baab03 NN |
425 | }; |
426 | ||
629a09ae DV |
427 | /** |
428 | * Returns information about the Dygraph object, including its containing ID. | |
429 | */ | |
22bd1dfb RK |
430 | Dygraph.prototype.toString = function() { |
431 | var maindiv = this.maindiv_; | |
758a629f | 432 | var id = (maindiv && maindiv.id) ? maindiv.id : maindiv; |
22bd1dfb | 433 | return "[Dygraph " + id + "]"; |
758a629f | 434 | }; |
22bd1dfb | 435 | |
629a09ae DV |
436 | /** |
437 | * @private | |
438 | * Returns the value of an option. This may be set by the user (either in the | |
439 | * constructor or by calling updateOptions) or by dygraphs, and may be set to a | |
440 | * per-series value. | |
441 | * @param { String } name The name of the option, e.g. 'rollPeriod'. | |
442 | * @param { String } [seriesName] The name of the series to which the option | |
443 | * will be applied. If no per-series value of this option is available, then | |
444 | * the global value is returned. This is optional. | |
445 | * @return { ... } The value of the option. | |
446 | */ | |
227b93cc | 447 | Dygraph.prototype.attr_ = function(name, seriesName) { |
028ddf8a DV |
448 | // <REMOVE_FOR_COMBINED> |
449 | if (typeof(Dygraph.OPTIONS_REFERENCE) === 'undefined') { | |
450 | this.error('Must include options reference JS for testing'); | |
451 | } else if (!Dygraph.OPTIONS_REFERENCE.hasOwnProperty(name)) { | |
452 | this.error('Dygraphs is using property ' + name + ', which has no entry ' + | |
453 | 'in the Dygraphs.OPTIONS_REFERENCE listing.'); | |
454 | // Only log this error once. | |
455 | Dygraph.OPTIONS_REFERENCE[name] = true; | |
456 | } | |
457 | // </REMOVE_FOR_COMBINED> | |
857a6931 KW |
458 | |
459 | var sources = []; | |
460 | sources.push(this.attrs_); | |
475f7420 KW |
461 | if (this.user_attrs_) { |
462 | sources.push(this.user_attrs_); | |
463 | if (seriesName) { | |
464 | if (this.user_attrs_.hasOwnProperty(seriesName)) { | |
465 | sources.push(this.user_attrs_[seriesName]); | |
466 | } | |
467 | if (seriesName === this.highlightSet_ && | |
468 | this.user_attrs_.hasOwnProperty('highlightSeriesOpts')) { | |
469 | sources.push(this.user_attrs_['highlightSeriesOpts']); | |
470 | } | |
857a6931 | 471 | } |
285a6bda | 472 | } |
857a6931 KW |
473 | |
474 | var ret = null; | |
475 | for (var i = sources.length - 1; i >= 0; --i) { | |
476 | var source = sources[i]; | |
477 | if (source.hasOwnProperty(name)) { | |
478 | ret = source[name]; | |
479 | break; | |
480 | } | |
285a6bda | 481 | } |
857a6931 | 482 | return ret; |
285a6bda DV |
483 | }; |
484 | ||
6a1aa64f | 485 | /** |
48e614ac DV |
486 | * @private |
487 | * @param String} axis The name of the axis (i.e. 'x', 'y' or 'y2') | |
488 | * @return { ... } A function mapping string -> option value | |
489 | */ | |
490 | Dygraph.prototype.optionsViewForAxis_ = function(axis) { | |
491 | var self = this; | |
492 | return function(opt) { | |
758a629f | 493 | var axis_opts = self.user_attrs_.axes; |
48e614ac DV |
494 | if (axis_opts && axis_opts[axis] && axis_opts[axis][opt]) { |
495 | return axis_opts[axis][opt]; | |
496 | } | |
497 | // user-specified attributes always trump defaults, even if they're less | |
498 | // specific. | |
499 | if (typeof(self.user_attrs_[opt]) != 'undefined') { | |
500 | return self.user_attrs_[opt]; | |
501 | } | |
502 | ||
758a629f | 503 | axis_opts = self.attrs_.axes; |
48e614ac DV |
504 | if (axis_opts && axis_opts[axis] && axis_opts[axis][opt]) { |
505 | return axis_opts[axis][opt]; | |
506 | } | |
507 | // check old-style axis options | |
508 | // TODO(danvk): add a deprecation warning if either of these match. | |
509 | if (axis == 'y' && self.axes_[0].hasOwnProperty(opt)) { | |
510 | return self.axes_[0][opt]; | |
511 | } else if (axis == 'y2' && self.axes_[1].hasOwnProperty(opt)) { | |
512 | return self.axes_[1][opt]; | |
513 | } | |
514 | return self.attr_(opt); | |
515 | }; | |
516 | }; | |
517 | ||
518 | /** | |
6a1aa64f | 519 | * Returns the current rolling period, as set by the user or an option. |
6faebb69 | 520 | * @return {Number} The number of points in the rolling window |
6a1aa64f | 521 | */ |
285a6bda | 522 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 523 | return this.rollPeriod_; |
76171648 DV |
524 | }; |
525 | ||
599fb4ad DV |
526 | /** |
527 | * Returns the currently-visible x-range. This can be affected by zooming, | |
528 | * panning or a call to updateOptions. | |
529 | * Returns a two-element array: [left, right]. | |
530 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
531 | */ | |
532 | Dygraph.prototype.xAxisRange = function() { | |
4cac8c7a RK |
533 | return this.dateWindow_ ? this.dateWindow_ : this.xAxisExtremes(); |
534 | }; | |
599fb4ad | 535 | |
4cac8c7a RK |
536 | /** |
537 | * Returns the lower- and upper-bound x-axis values of the | |
538 | * data set. | |
539 | */ | |
540 | Dygraph.prototype.xAxisExtremes = function() { | |
599fb4ad DV |
541 | var left = this.rawData_[0][0]; |
542 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
543 | return [left, right]; | |
544 | }; | |
545 | ||
3230c662 | 546 | /** |
d58ae307 DV |
547 | * Returns the currently-visible y-range for an axis. This can be affected by |
548 | * zooming, panning or a call to updateOptions. Axis indices are zero-based. If | |
549 | * called with no arguments, returns the range of the first axis. | |
3230c662 DV |
550 | * Returns a two-element array: [bottom, top]. |
551 | */ | |
d58ae307 | 552 | Dygraph.prototype.yAxisRange = function(idx) { |
d63e6799 | 553 | if (typeof(idx) == "undefined") idx = 0; |
d64b8fea RK |
554 | if (idx < 0 || idx >= this.axes_.length) { |
555 | return null; | |
556 | } | |
557 | var axis = this.axes_[idx]; | |
558 | return [ axis.computedValueRange[0], axis.computedValueRange[1] ]; | |
d58ae307 DV |
559 | }; |
560 | ||
561 | /** | |
562 | * Returns the currently-visible y-ranges for each axis. This can be affected by | |
563 | * zooming, panning, calls to updateOptions, etc. | |
564 | * Returns an array of [bottom, top] pairs, one for each y-axis. | |
565 | */ | |
566 | Dygraph.prototype.yAxisRanges = function() { | |
567 | var ret = []; | |
568 | for (var i = 0; i < this.axes_.length; i++) { | |
569 | ret.push(this.yAxisRange(i)); | |
570 | } | |
571 | return ret; | |
3230c662 DV |
572 | }; |
573 | ||
d58ae307 | 574 | // TODO(danvk): use these functions throughout dygraphs. |
3230c662 DV |
575 | /** |
576 | * Convert from data coordinates to canvas/div X/Y coordinates. | |
d58ae307 DV |
577 | * If specified, do this conversion for the coordinate system of a particular |
578 | * axis. Uses the first axis by default. | |
3230c662 | 579 | * Returns a two-element array: [X, Y] |
ff022deb | 580 | * |
0747928a | 581 | * Note: use toDomXCoord instead of toDomCoords(x, null) and use toDomYCoord |
ff022deb | 582 | * instead of toDomCoords(null, y, axis). |
3230c662 | 583 | */ |
d58ae307 | 584 | Dygraph.prototype.toDomCoords = function(x, y, axis) { |
ff022deb RK |
585 | return [ this.toDomXCoord(x), this.toDomYCoord(y, axis) ]; |
586 | }; | |
587 | ||
588 | /** | |
589 | * Convert from data x coordinates to canvas/div X coordinate. | |
590 | * If specified, do this conversion for the coordinate system of a particular | |
0037b2a4 RK |
591 | * axis. |
592 | * Returns a single value or null if x is null. | |
ff022deb RK |
593 | */ |
594 | Dygraph.prototype.toDomXCoord = function(x) { | |
758a629f | 595 | if (x === null) { |
ff022deb | 596 | return null; |
758a629f | 597 | } |
ff022deb | 598 | |
3230c662 | 599 | var area = this.plotter_.area; |
ff022deb RK |
600 | var xRange = this.xAxisRange(); |
601 | return area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; | |
758a629f | 602 | }; |
3230c662 | 603 | |
ff022deb RK |
604 | /** |
605 | * Convert from data x coordinates to canvas/div Y coordinate and optional | |
606 | * axis. Uses the first axis by default. | |
607 | * | |
608 | * returns a single value or null if y is null. | |
609 | */ | |
610 | Dygraph.prototype.toDomYCoord = function(y, axis) { | |
0747928a | 611 | var pct = this.toPercentYCoord(y, axis); |
3230c662 | 612 | |
758a629f | 613 | if (pct === null) { |
ff022deb RK |
614 | return null; |
615 | } | |
e4416fb9 | 616 | var area = this.plotter_.area; |
ff022deb | 617 | return area.y + pct * area.h; |
758a629f | 618 | }; |
3230c662 DV |
619 | |
620 | /** | |
621 | * Convert from canvas/div coords to data coordinates. | |
d58ae307 DV |
622 | * If specified, do this conversion for the coordinate system of a particular |
623 | * axis. Uses the first axis by default. | |
ff022deb RK |
624 | * Returns a two-element array: [X, Y]. |
625 | * | |
0747928a | 626 | * Note: use toDataXCoord instead of toDataCoords(x, null) and use toDataYCoord |
ff022deb | 627 | * instead of toDataCoords(null, y, axis). |
3230c662 | 628 | */ |
d58ae307 | 629 | Dygraph.prototype.toDataCoords = function(x, y, axis) { |
ff022deb RK |
630 | return [ this.toDataXCoord(x), this.toDataYCoord(y, axis) ]; |
631 | }; | |
632 | ||
633 | /** | |
634 | * Convert from canvas/div x coordinate to data coordinate. | |
635 | * | |
636 | * If x is null, this returns null. | |
637 | */ | |
638 | Dygraph.prototype.toDataXCoord = function(x) { | |
758a629f | 639 | if (x === null) { |
ff022deb | 640 | return null; |
3230c662 DV |
641 | } |
642 | ||
ff022deb RK |
643 | var area = this.plotter_.area; |
644 | var xRange = this.xAxisRange(); | |
645 | return xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); | |
646 | }; | |
647 | ||
648 | /** | |
649 | * Convert from canvas/div y coord to value. | |
650 | * | |
651 | * If y is null, this returns null. | |
652 | * if axis is null, this uses the first axis. | |
653 | */ | |
654 | Dygraph.prototype.toDataYCoord = function(y, axis) { | |
758a629f | 655 | if (y === null) { |
ff022deb | 656 | return null; |
3230c662 DV |
657 | } |
658 | ||
ff022deb RK |
659 | var area = this.plotter_.area; |
660 | var yRange = this.yAxisRange(axis); | |
661 | ||
b70247dc RK |
662 | if (typeof(axis) == "undefined") axis = 0; |
663 | if (!this.axes_[axis].logscale) { | |
d9816e62 | 664 | return yRange[0] + (area.y + area.h - y) / area.h * (yRange[1] - yRange[0]); |
ff022deb RK |
665 | } else { |
666 | // Computing the inverse of toDomCoord. | |
758a629f | 667 | var pct = (y - area.y) / area.h; |
ff022deb RK |
668 | |
669 | // Computing the inverse of toPercentYCoord. The function was arrived at with | |
670 | // the following steps: | |
671 | // | |
672 | // Original calcuation: | |
d59b6f34 | 673 | // pct = (logr1 - Dygraph.log10(y)) / (logr1 - Dygraph.log10(yRange[0])); |
ff022deb RK |
674 | // |
675 | // Move denominator to both sides: | |
d59b6f34 | 676 | // pct * (logr1 - Dygraph.log10(yRange[0])) = logr1 - Dygraph.log10(y); |
ff022deb RK |
677 | // |
678 | // subtract logr1, and take the negative value. | |
d59b6f34 | 679 | // logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))) = Dygraph.log10(y); |
ff022deb RK |
680 | // |
681 | // Swap both sides of the equation, and we can compute the log of the | |
682 | // return value. Which means we just need to use that as the exponent in | |
683 | // e^exponent. | |
d59b6f34 | 684 | // Dygraph.log10(y) = logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))); |
ff022deb | 685 | |
d59b6f34 RK |
686 | var logr1 = Dygraph.log10(yRange[1]); |
687 | var exponent = logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))); | |
688 | var value = Math.pow(Dygraph.LOG_SCALE, exponent); | |
ff022deb RK |
689 | return value; |
690 | } | |
3230c662 DV |
691 | }; |
692 | ||
e99fde05 | 693 | /** |
ff022deb | 694 | * Converts a y for an axis to a percentage from the top to the |
4cac8c7a | 695 | * bottom of the drawing area. |
ff022deb RK |
696 | * |
697 | * If the coordinate represents a value visible on the canvas, then | |
698 | * the value will be between 0 and 1, where 0 is the top of the canvas. | |
699 | * However, this method will return values outside the range, as | |
700 | * values can fall outside the canvas. | |
701 | * | |
702 | * If y is null, this returns null. | |
703 | * if axis is null, this uses the first axis. | |
629a09ae DV |
704 | * |
705 | * @param { Number } y The data y-coordinate. | |
706 | * @param { Number } [axis] The axis number on which the data coordinate lives. | |
707 | * @return { Number } A fraction in [0, 1] where 0 = the top edge. | |
ff022deb RK |
708 | */ |
709 | Dygraph.prototype.toPercentYCoord = function(y, axis) { | |
758a629f | 710 | if (y === null) { |
ff022deb RK |
711 | return null; |
712 | } | |
7d0e7a0d | 713 | if (typeof(axis) == "undefined") axis = 0; |
ff022deb | 714 | |
ff022deb RK |
715 | var yRange = this.yAxisRange(axis); |
716 | ||
717 | var pct; | |
7d0e7a0d | 718 | if (!this.axes_[axis].logscale) { |
4cac8c7a RK |
719 | // yRange[1] - y is unit distance from the bottom. |
720 | // yRange[1] - yRange[0] is the scale of the range. | |
ff022deb RK |
721 | // (yRange[1] - y) / (yRange[1] - yRange[0]) is the % from the bottom. |
722 | pct = (yRange[1] - y) / (yRange[1] - yRange[0]); | |
723 | } else { | |
d59b6f34 RK |
724 | var logr1 = Dygraph.log10(yRange[1]); |
725 | pct = (logr1 - Dygraph.log10(y)) / (logr1 - Dygraph.log10(yRange[0])); | |
ff022deb RK |
726 | } |
727 | return pct; | |
758a629f | 728 | }; |
ff022deb RK |
729 | |
730 | /** | |
4cac8c7a RK |
731 | * Converts an x value to a percentage from the left to the right of |
732 | * the drawing area. | |
733 | * | |
734 | * If the coordinate represents a value visible on the canvas, then | |
735 | * the value will be between 0 and 1, where 0 is the left of the canvas. | |
736 | * However, this method will return values outside the range, as | |
737 | * values can fall outside the canvas. | |
738 | * | |
739 | * If x is null, this returns null. | |
629a09ae DV |
740 | * @param { Number } x The data x-coordinate. |
741 | * @return { Number } A fraction in [0, 1] where 0 = the left edge. | |
4cac8c7a RK |
742 | */ |
743 | Dygraph.prototype.toPercentXCoord = function(x) { | |
758a629f | 744 | if (x === null) { |
4cac8c7a RK |
745 | return null; |
746 | } | |
747 | ||
4cac8c7a | 748 | var xRange = this.xAxisRange(); |
965a030e | 749 | return (x - xRange[0]) / (xRange[1] - xRange[0]); |
629a09ae | 750 | }; |
4cac8c7a RK |
751 | |
752 | /** | |
e99fde05 | 753 | * Returns the number of columns (including the independent variable). |
629a09ae | 754 | * @return { Integer } The number of columns. |
e99fde05 DV |
755 | */ |
756 | Dygraph.prototype.numColumns = function() { | |
395e98a3 | 757 | return this.rawData_[0] ? this.rawData_[0].length : this.attr_("labels").length; |
e99fde05 DV |
758 | }; |
759 | ||
760 | /** | |
761 | * Returns the number of rows (excluding any header/label row). | |
629a09ae | 762 | * @return { Integer } The number of rows, less any header. |
e99fde05 DV |
763 | */ |
764 | Dygraph.prototype.numRows = function() { | |
765 | return this.rawData_.length; | |
766 | }; | |
767 | ||
768 | /** | |
395e98a3 DV |
769 | * Returns the full range of the x-axis, as determined by the most extreme |
770 | * values in the data set. Not affected by zooming, visibility, etc. | |
769e8bc7 | 771 | * TODO(danvk): merge w/ xAxisExtremes |
395e98a3 DV |
772 | * @return { Array<Number> } A [low, high] pair |
773 | * @private | |
774 | */ | |
775 | Dygraph.prototype.fullXRange_ = function() { | |
776 | if (this.numRows() > 0) { | |
777 | return [this.rawData_[0][0], this.rawData_[this.numRows() - 1][0]]; | |
778 | } else { | |
779 | return [0, 1]; | |
780 | } | |
758a629f | 781 | }; |
395e98a3 DV |
782 | |
783 | /** | |
e99fde05 DV |
784 | * Returns the value in the given row and column. If the row and column exceed |
785 | * the bounds on the data, returns null. Also returns null if the value is | |
786 | * missing. | |
629a09ae DV |
787 | * @param { Number} row The row number of the data (0-based). Row 0 is the |
788 | * first row of data, not a header row. | |
789 | * @param { Number} col The column number of the data (0-based) | |
790 | * @return { Number } The value in the specified cell or null if the row/col | |
791 | * were out of range. | |
e99fde05 DV |
792 | */ |
793 | Dygraph.prototype.getValue = function(row, col) { | |
794 | if (row < 0 || row > this.rawData_.length) return null; | |
795 | if (col < 0 || col > this.rawData_[row].length) return null; | |
796 | ||
797 | return this.rawData_[row][col]; | |
798 | }; | |
799 | ||
629a09ae | 800 | /** |
285a6bda | 801 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 802 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 803 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
804 | * @private |
805 | */ | |
285a6bda | 806 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
807 | // Create the all-enclosing graph div |
808 | var enclosing = this.maindiv_; | |
809 | ||
b0c3b730 DV |
810 | this.graphDiv = document.createElement("div"); |
811 | this.graphDiv.style.width = this.width_ + "px"; | |
812 | this.graphDiv.style.height = this.height_ + "px"; | |
813 | enclosing.appendChild(this.graphDiv); | |
814 | ||
815 | // Create the canvas for interactive parts of the chart. | |
f8cfec73 | 816 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 DV |
817 | this.canvas_.style.position = "absolute"; |
818 | this.canvas_.width = this.width_; | |
819 | this.canvas_.height = this.height_; | |
f8cfec73 DV |
820 | this.canvas_.style.width = this.width_ + "px"; // for IE |
821 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
b0c3b730 | 822 | |
2cf95fff RK |
823 | this.canvas_ctx_ = Dygraph.getContext(this.canvas_); |
824 | ||
b0c3b730 | 825 | // ... and for static parts of the chart. |
6a1aa64f | 826 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
2cf95fff | 827 | this.hidden_ctx_ = Dygraph.getContext(this.hidden_); |
76171648 | 828 | |
ccd9d7c2 PF |
829 | if (this.attr_('showRangeSelector')) { |
830 | // The range selector must be created here so that its canvases and contexts get created here. | |
831 | // For some reason, if the canvases and contexts don't get created here, things don't work in IE. | |
832 | // The range selector also sets xAxisHeight in order to reserve space. | |
833 | this.rangeSelector_ = new DygraphRangeSelector(this); | |
834 | } | |
835 | ||
eb7bf005 EC |
836 | // The interactive parts of the graph are drawn on top of the chart. |
837 | this.graphDiv.appendChild(this.hidden_); | |
838 | this.graphDiv.appendChild(this.canvas_); | |
920208fb PF |
839 | this.mouseEventElement_ = this.createMouseEventElement_(); |
840 | ||
841 | // Create the grapher | |
842 | this.layout_ = new DygraphLayout(this); | |
843 | ||
844 | if (this.rangeSelector_) { | |
845 | // This needs to happen after the graph canvases are added to the div and the layout object is created. | |
846 | this.rangeSelector_.addToGraph(this.graphDiv, this.layout_); | |
847 | } | |
eb7bf005 | 848 | |
76171648 | 849 | var dygraph = this; |
d7eddd78 US |
850 | |
851 | this.mouseMoveHandler = function(e) { | |
421f1773 | 852 | dygraph.mouseMove_(e); |
d7eddd78 US |
853 | }; |
854 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', this.mouseMoveHandler); | |
855 | ||
856 | this.mouseOutHandler = function(e) { | |
421f1773 | 857 | dygraph.mouseOut_(e); |
d7eddd78 US |
858 | }; |
859 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', this.mouseOutHandler); | |
697e70b2 | 860 | |
697e70b2 | 861 | this.createStatusMessage_(); |
697e70b2 | 862 | this.createDragInterface_(); |
4b4d1a63 | 863 | |
1c6b239c | 864 | this.resizeHandler = function(e) { |
865 | dygraph.resize(); | |
d7eddd78 | 866 | }; |
1c6b239c | 867 | |
4b4d1a63 DV |
868 | // Update when the window is resized. |
869 | // TODO(danvk): drop frames depending on complexity of the chart. | |
1c6b239c | 870 | Dygraph.addEvent(window, 'resize', this.resizeHandler); |
4cfcc38c DV |
871 | }; |
872 | ||
873 | /** | |
874 | * Detach DOM elements in the dygraph and null out all data references. | |
875 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
876 | * usage. See, e.g., the tests/perf.html example. | |
877 | */ | |
878 | Dygraph.prototype.destroy = function() { | |
879 | var removeRecursive = function(node) { | |
880 | while (node.hasChildNodes()) { | |
881 | removeRecursive(node.firstChild); | |
882 | node.removeChild(node.firstChild); | |
883 | } | |
884 | }; | |
d7eddd78 US |
885 | |
886 | // remove mouse event handlers | |
887 | Dygraph.removeEvent(this.mouseEventElement_, 'mouseout', this.mouseOutHandler); | |
888 | Dygraph.removeEvent(this.mouseEventElement_, 'mousemove', this.mouseMoveHandler); | |
cb1261cb | 889 | Dygraph.removeEvent(this.mouseEventElement_, 'mousemove', this.mouseUpHandler_); |
4cfcc38c DV |
890 | removeRecursive(this.maindiv_); |
891 | ||
892 | var nullOut = function(obj) { | |
893 | for (var n in obj) { | |
894 | if (typeof(obj[n]) === 'object') { | |
895 | obj[n] = null; | |
896 | } | |
897 | } | |
898 | }; | |
1c6b239c | 899 | // remove event handlers |
900 | Dygraph.removeEvent(window,'resize',this.resizeHandler); | |
901 | this.resizeHandler = null; | |
4cfcc38c DV |
902 | // These may not all be necessary, but it can't hurt... |
903 | nullOut(this.layout_); | |
904 | nullOut(this.plotter_); | |
905 | nullOut(this); | |
906 | }; | |
6a1aa64f DV |
907 | |
908 | /** | |
629a09ae DV |
909 | * Creates the canvas on which the chart will be drawn. Only the Renderer ever |
910 | * draws on this particular canvas. All Dygraph work (i.e. drawing hover dots | |
911 | * or the zoom rectangles) is done on this.canvas_. | |
8846615a | 912 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
913 | * @return {Object} The newly-created canvas |
914 | * @private | |
915 | */ | |
285a6bda | 916 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 | 917 | var h = Dygraph.createCanvas(); |
6a1aa64f | 918 | h.style.position = "absolute"; |
9ac5e4ae DV |
919 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
920 | // some extra area to make it easier to zoom in on the far left and far | |
921 | // right. h needs to be precisely the plot area, so that clipping occurs. | |
6a1aa64f DV |
922 | h.style.top = canvas.style.top; |
923 | h.style.left = canvas.style.left; | |
924 | h.width = this.width_; | |
925 | h.height = this.height_; | |
f8cfec73 DV |
926 | h.style.width = this.width_ + "px"; // for IE |
927 | h.style.height = this.height_ + "px"; // for IE | |
6a1aa64f DV |
928 | return h; |
929 | }; | |
930 | ||
629a09ae | 931 | /** |
920208fb PF |
932 | * Creates an overlay element used to handle mouse events. |
933 | * @return {Object} The mouse event element. | |
934 | * @private | |
935 | */ | |
936 | Dygraph.prototype.createMouseEventElement_ = function() { | |
937 | if (this.isUsingExcanvas_) { | |
938 | var elem = document.createElement("div"); | |
939 | elem.style.position = 'absolute'; | |
940 | elem.style.backgroundColor = 'white'; | |
941 | elem.style.filter = 'alpha(opacity=0)'; | |
942 | elem.style.width = this.width_ + "px"; | |
943 | elem.style.height = this.height_ + "px"; | |
944 | this.graphDiv.appendChild(elem); | |
945 | return elem; | |
946 | } else { | |
947 | return this.canvas_; | |
948 | } | |
949 | }; | |
950 | ||
951 | /** | |
6a1aa64f DV |
952 | * Generate a set of distinct colors for the data series. This is done with a |
953 | * color wheel. Saturation/Value are customizable, and the hue is | |
954 | * equally-spaced around the color wheel. If a custom set of colors is | |
955 | * specified, that is used instead. | |
6a1aa64f DV |
956 | * @private |
957 | */ | |
285a6bda | 958 | Dygraph.prototype.setColors_ = function() { |
285a6bda | 959 | var num = this.attr_("labels").length - 1; |
6a1aa64f | 960 | this.colors_ = []; |
285a6bda | 961 | var colors = this.attr_('colors'); |
758a629f | 962 | var i; |
285a6bda DV |
963 | if (!colors) { |
964 | var sat = this.attr_('colorSaturation') || 1.0; | |
965 | var val = this.attr_('colorValue') || 0.5; | |
2aa21213 | 966 | var half = Math.ceil(num / 2); |
758a629f | 967 | for (i = 1; i <= num; i++) { |
ec1959eb | 968 | if (!this.visibility()[i-1]) continue; |
43af96e7 | 969 | // alternate colors for high contrast. |
2aa21213 | 970 | var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2); |
43af96e7 NK |
971 | var hue = (1.0 * idx/ (1 + num)); |
972 | this.colors_.push(Dygraph.hsvToRGB(hue, sat, val)); | |
6a1aa64f DV |
973 | } |
974 | } else { | |
758a629f | 975 | for (i = 0; i < num; i++) { |
ec1959eb | 976 | if (!this.visibility()[i]) continue; |
285a6bda | 977 | var colorStr = colors[i % colors.length]; |
f474c2a3 | 978 | this.colors_.push(colorStr); |
6a1aa64f DV |
979 | } |
980 | } | |
600d841a DV |
981 | |
982 | this.plotter_.setColors(this.colors_); | |
629a09ae | 983 | }; |
6a1aa64f | 984 | |
43af96e7 NK |
985 | /** |
986 | * Return the list of colors. This is either the list of colors passed in the | |
629a09ae | 987 | * attributes or the autogenerated list of rgb(r,g,b) strings. |
43af96e7 NK |
988 | * @return {Array<string>} The list of colors. |
989 | */ | |
990 | Dygraph.prototype.getColors = function() { | |
991 | return this.colors_; | |
992 | }; | |
993 | ||
6a1aa64f DV |
994 | /** |
995 | * Create the div that contains information on the selected point(s) | |
996 | * This goes in the top right of the canvas, unless an external div has already | |
997 | * been specified. | |
998 | * @private | |
999 | */ | |
fedbd797 | 1000 | Dygraph.prototype.createStatusMessage_ = function() { |
758a629f DV |
1001 | var userLabelsDiv = this.user_attrs_.labelsDiv; |
1002 | if (userLabelsDiv && null !== userLabelsDiv && | |
1003 | (typeof(userLabelsDiv) == "string" || userLabelsDiv instanceof String)) { | |
1004 | this.user_attrs_.labelsDiv = document.getElementById(userLabelsDiv); | |
fedbd797 | 1005 | } |
285a6bda DV |
1006 | if (!this.attr_("labelsDiv")) { |
1007 | var divWidth = this.attr_('labelsDivWidth'); | |
b0c3b730 | 1008 | var messagestyle = { |
6a1aa64f DV |
1009 | "position": "absolute", |
1010 | "fontSize": "14px", | |
1011 | "zIndex": 10, | |
1012 | "width": divWidth + "px", | |
1013 | "top": "0px", | |
8846615a | 1014 | "left": (this.width_ - divWidth - 2) + "px", |
6a1aa64f | 1015 | "background": "white", |
d7153238 | 1016 | "lineHeight": "normal", |
6a1aa64f | 1017 | "textAlign": "left", |
b0c3b730 | 1018 | "overflow": "hidden"}; |
fc80a396 | 1019 | Dygraph.update(messagestyle, this.attr_('labelsDivStyles')); |
b0c3b730 | 1020 | var div = document.createElement("div"); |
02d8dc64 | 1021 | div.className = "dygraph-legend"; |
b0c3b730 | 1022 | for (var name in messagestyle) { |
0e261c43 DV |
1023 | if (messagestyle.hasOwnProperty(name)) { |
1024 | try { | |
1025 | div.style[name] = messagestyle[name]; | |
1026 | } catch (e) { | |
1027 | this.warn("You are using unsupported css properties for your browser in labelsDivStyles"); | |
1028 | } | |
1029 | } | |
b0c3b730 DV |
1030 | } |
1031 | this.graphDiv.appendChild(div); | |
285a6bda | 1032 | this.attrs_.labelsDiv = div; |
6a1aa64f DV |
1033 | } |
1034 | }; | |
1035 | ||
1036 | /** | |
ad1798c2 DV |
1037 | * Position the labels div so that: |
1038 | * - its right edge is flush with the right edge of the charting area | |
1039 | * - its top edge is flush with the top edge of the charting area | |
629a09ae | 1040 | * @private |
0abfbd7e DV |
1041 | */ |
1042 | Dygraph.prototype.positionLabelsDiv_ = function() { | |
1043 | // Don't touch a user-specified labelsDiv. | |
1044 | if (this.user_attrs_.hasOwnProperty("labelsDiv")) return; | |
1045 | ||
1046 | var area = this.plotter_.area; | |
1047 | var div = this.attr_("labelsDiv"); | |
8c21adcf | 1048 | div.style.left = area.x + area.w - this.attr_("labelsDivWidth") - 1 + "px"; |
ad1798c2 | 1049 | div.style.top = area.y + "px"; |
0abfbd7e DV |
1050 | }; |
1051 | ||
1052 | /** | |
6a1aa64f | 1053 | * Create the text box to adjust the averaging period |
6a1aa64f DV |
1054 | * @private |
1055 | */ | |
285a6bda | 1056 | Dygraph.prototype.createRollInterface_ = function() { |
8c69de65 DV |
1057 | // Create a roller if one doesn't exist already. |
1058 | if (!this.roller_) { | |
1059 | this.roller_ = document.createElement("input"); | |
1060 | this.roller_.type = "text"; | |
1061 | this.roller_.style.display = "none"; | |
1062 | this.graphDiv.appendChild(this.roller_); | |
1063 | } | |
1064 | ||
1065 | var display = this.attr_('showRoller') ? 'block' : 'none'; | |
26ca7938 | 1066 | |
0c38f187 | 1067 | var area = this.plotter_.area; |
b0c3b730 DV |
1068 | var textAttr = { "position": "absolute", |
1069 | "zIndex": 10, | |
0c38f187 DV |
1070 | "top": (area.y + area.h - 25) + "px", |
1071 | "left": (area.x + 1) + "px", | |
b0c3b730 | 1072 | "display": display |
6a1aa64f | 1073 | }; |
8c69de65 DV |
1074 | this.roller_.size = "2"; |
1075 | this.roller_.value = this.rollPeriod_; | |
b0c3b730 | 1076 | for (var name in textAttr) { |
85b99f0b | 1077 | if (textAttr.hasOwnProperty(name)) { |
8c69de65 | 1078 | this.roller_.style[name] = textAttr[name]; |
85b99f0b | 1079 | } |
b0c3b730 DV |
1080 | } |
1081 | ||
76171648 | 1082 | var dygraph = this; |
8c69de65 | 1083 | this.roller_.onchange = function() { dygraph.adjustRoll(dygraph.roller_.value); }; |
76171648 DV |
1084 | }; |
1085 | ||
629a09ae DV |
1086 | /** |
1087 | * @private | |
629a09ae DV |
1088 | * Converts page the x-coordinate of the event to pixel x-coordinates on the |
1089 | * canvas (i.e. DOM Coords). | |
1090 | */ | |
062ef401 | 1091 | Dygraph.prototype.dragGetX_ = function(e, context) { |
758a629f | 1092 | return Dygraph.pageX(e) - context.px; |
062ef401 | 1093 | }; |
bce01b0f | 1094 | |
629a09ae DV |
1095 | /** |
1096 | * @private | |
1097 | * Converts page the y-coordinate of the event to pixel y-coordinates on the | |
1098 | * canvas (i.e. DOM Coords). | |
1099 | */ | |
062ef401 | 1100 | Dygraph.prototype.dragGetY_ = function(e, context) { |
758a629f | 1101 | return Dygraph.pageY(e) - context.py; |
062ef401 | 1102 | }; |
ee672584 | 1103 | |
629a09ae | 1104 | /** |
062ef401 JB |
1105 | * Set up all the mouse handlers needed to capture dragging behavior for zoom |
1106 | * events. | |
1107 | * @private | |
1108 | */ | |
1109 | Dygraph.prototype.createDragInterface_ = function() { | |
1110 | var context = { | |
1111 | // Tracks whether the mouse is down right now | |
1112 | isZooming: false, | |
1113 | isPanning: false, // is this drag part of a pan? | |
1114 | is2DPan: false, // if so, is that pan 1- or 2-dimensional? | |
8442269f RK |
1115 | dragStartX: null, // pixel coordinates |
1116 | dragStartY: null, // pixel coordinates | |
1117 | dragEndX: null, // pixel coordinates | |
1118 | dragEndY: null, // pixel coordinates | |
062ef401 | 1119 | dragDirection: null, |
8442269f RK |
1120 | prevEndX: null, // pixel coordinates |
1121 | prevEndY: null, // pixel coordinates | |
062ef401 | 1122 | prevDragDirection: null, |
421f1773 | 1123 | cancelNextDblclick: false, // see comment in dygraph-interaction-model.js |
062ef401 | 1124 | |
ec291cbe RK |
1125 | // The value on the left side of the graph when a pan operation starts. |
1126 | initialLeftmostDate: null, | |
1127 | ||
1128 | // The number of units each pixel spans. (This won't be valid for log | |
1129 | // scales) | |
1130 | xUnitsPerPixel: null, | |
062ef401 JB |
1131 | |
1132 | // TODO(danvk): update this comment | |
1133 | // The range in second/value units that the viewport encompasses during a | |
1134 | // panning operation. | |
1135 | dateRange: null, | |
1136 | ||
8442269f RK |
1137 | // Top-left corner of the canvas, in DOM coords |
1138 | // TODO(konigsberg): Rename topLeftCanvasX, topLeftCanvasY. | |
062ef401 JB |
1139 | px: 0, |
1140 | py: 0, | |
1141 | ||
965a030e | 1142 | // Values for use with panEdgeFraction, which limit how far outside the |
4cac8c7a RK |
1143 | // graph's data boundaries it can be panned. |
1144 | boundedDates: null, // [minDate, maxDate] | |
1145 | boundedValues: null, // [[minValue, maxValue] ...] | |
1146 | ||
062ef401 JB |
1147 | initializeMouseDown: function(event, g, context) { |
1148 | // prevents mouse drags from selecting page text. | |
1149 | if (event.preventDefault) { | |
1150 | event.preventDefault(); // Firefox, Chrome, etc. | |
6a1aa64f | 1151 | } else { |
062ef401 JB |
1152 | event.returnValue = false; // IE |
1153 | event.cancelBubble = true; | |
6a1aa64f DV |
1154 | } |
1155 | ||
062ef401 JB |
1156 | context.px = Dygraph.findPosX(g.canvas_); |
1157 | context.py = Dygraph.findPosY(g.canvas_); | |
1158 | context.dragStartX = g.dragGetX_(event, context); | |
1159 | context.dragStartY = g.dragGetY_(event, context); | |
421f1773 | 1160 | context.cancelNextDblclick = false; |
6a1aa64f | 1161 | } |
062ef401 | 1162 | }; |
2b188b3d | 1163 | |
062ef401 | 1164 | var interactionModel = this.attr_("interactionModel"); |
8b83c6cc | 1165 | |
062ef401 JB |
1166 | // Self is the graph. |
1167 | var self = this; | |
6faebb69 | 1168 | |
062ef401 JB |
1169 | // Function that binds the graph and context to the handler. |
1170 | var bindHandler = function(handler) { | |
1171 | return function(event) { | |
1172 | handler(event, self, context); | |
1173 | }; | |
1174 | }; | |
1175 | ||
1176 | for (var eventName in interactionModel) { | |
1177 | if (!interactionModel.hasOwnProperty(eventName)) continue; | |
1178 | Dygraph.addEvent(this.mouseEventElement_, eventName, | |
1179 | bindHandler(interactionModel[eventName])); | |
1180 | } | |
1181 | ||
1182 | // If the user releases the mouse button during a drag, but not over the | |
1183 | // canvas, then it doesn't count as a zooming action. | |
cb1261cb | 1184 | this.mouseUpHandler_ = function(event) { |
062ef401 JB |
1185 | if (context.isZooming || context.isPanning) { |
1186 | context.isZooming = false; | |
1187 | context.dragStartX = null; | |
1188 | context.dragStartY = null; | |
1189 | } | |
1190 | ||
1191 | if (context.isPanning) { | |
1192 | context.isPanning = false; | |
1193 | context.draggingDate = null; | |
1194 | context.dateRange = null; | |
1195 | for (var i = 0; i < self.axes_.length; i++) { | |
1196 | delete self.axes_[i].draggingValue; | |
1197 | delete self.axes_[i].dragValueRange; | |
1198 | } | |
1199 | } | |
cb1261cb DV |
1200 | }; |
1201 | ||
1202 | Dygraph.addEvent(document, 'mouseup', this.mouseUpHandler_); | |
6a1aa64f DV |
1203 | }; |
1204 | ||
1205 | /** | |
1206 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
1207 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
1208 | * avoid extra redrawing, but it's tricky to avoid interactions with the status | |
1209 | * dots. | |
ccd9d7c2 | 1210 | * |
39b0e098 RK |
1211 | * @param {Number} direction the direction of the zoom rectangle. Acceptable |
1212 | * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL. | |
6a1aa64f DV |
1213 | * @param {Number} startX The X position where the drag started, in canvas |
1214 | * coordinates. | |
1215 | * @param {Number} endX The current X position of the drag, in canvas coords. | |
8b83c6cc RK |
1216 | * @param {Number} startY The Y position where the drag started, in canvas |
1217 | * coordinates. | |
1218 | * @param {Number} endY The current Y position of the drag, in canvas coords. | |
39b0e098 | 1219 | * @param {Number} prevDirection the value of direction on the previous call to |
8b83c6cc | 1220 | * this function. Used to avoid excess redrawing |
6a1aa64f DV |
1221 | * @param {Number} prevEndX The value of endX on the previous call to this |
1222 | * function. Used to avoid excess redrawing | |
8b83c6cc RK |
1223 | * @param {Number} prevEndY The value of endY on the previous call to this |
1224 | * function. Used to avoid excess redrawing | |
6a1aa64f DV |
1225 | * @private |
1226 | */ | |
7201b11e JB |
1227 | Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY, |
1228 | endY, prevDirection, prevEndX, | |
1229 | prevEndY) { | |
2cf95fff | 1230 | var ctx = this.canvas_ctx_; |
6a1aa64f DV |
1231 | |
1232 | // Clean up from the previous rect if necessary | |
39b0e098 | 1233 | if (prevDirection == Dygraph.HORIZONTAL) { |
fa54c193 FXB |
1234 | ctx.clearRect(Math.min(startX, prevEndX), this.layout_.getPlotArea().y, |
1235 | Math.abs(startX - prevEndX), this.layout_.getPlotArea().h); | |
39b0e098 | 1236 | } else if (prevDirection == Dygraph.VERTICAL){ |
fa54c193 FXB |
1237 | ctx.clearRect(this.layout_.getPlotArea().x, Math.min(startY, prevEndY), |
1238 | this.layout_.getPlotArea().w, Math.abs(startY - prevEndY)); | |
6a1aa64f DV |
1239 | } |
1240 | ||
1241 | // Draw a light-grey rectangle to show the new viewing area | |
39b0e098 | 1242 | if (direction == Dygraph.HORIZONTAL) { |
8b83c6cc RK |
1243 | if (endX && startX) { |
1244 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
fa54c193 FXB |
1245 | ctx.fillRect(Math.min(startX, endX), this.layout_.getPlotArea().y, |
1246 | Math.abs(endX - startX), this.layout_.getPlotArea().h); | |
8b83c6cc | 1247 | } |
920208fb | 1248 | } else if (direction == Dygraph.VERTICAL) { |
8b83c6cc RK |
1249 | if (endY && startY) { |
1250 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
fa54c193 FXB |
1251 | ctx.fillRect(this.layout_.getPlotArea().x, Math.min(startY, endY), |
1252 | this.layout_.getPlotArea().w, Math.abs(endY - startY)); | |
8b83c6cc | 1253 | } |
6a1aa64f | 1254 | } |
920208fb PF |
1255 | |
1256 | if (this.isUsingExcanvas_) { | |
1257 | this.currentZoomRectArgs_ = [direction, startX, endX, startY, endY, 0, 0, 0]; | |
1258 | } | |
1259 | }; | |
1260 | ||
1261 | /** | |
1262 | * Clear the zoom rectangle (and perform no zoom). | |
1263 | * @private | |
1264 | */ | |
1265 | Dygraph.prototype.clearZoomRect_ = function() { | |
1266 | this.currentZoomRectArgs_ = null; | |
1267 | this.canvas_ctx_.clearRect(0, 0, this.canvas_.width, this.canvas_.height); | |
6a1aa64f DV |
1268 | }; |
1269 | ||
1270 | /** | |
8b83c6cc RK |
1271 | * Zoom to something containing [lowX, highX]. These are pixel coordinates in |
1272 | * the canvas. The exact zoom window may be slightly larger if there are no data | |
1273 | * points near lowX or highX. Don't confuse this function with doZoomXDates, | |
1274 | * which accepts dates that match the raw data. This function redraws the graph. | |
d58ae307 | 1275 | * |
6a1aa64f DV |
1276 | * @param {Number} lowX The leftmost pixel value that should be visible. |
1277 | * @param {Number} highX The rightmost pixel value that should be visible. | |
1278 | * @private | |
1279 | */ | |
8b83c6cc | 1280 | Dygraph.prototype.doZoomX_ = function(lowX, highX) { |
920208fb | 1281 | this.currentZoomRectArgs_ = null; |
6a1aa64f | 1282 | // Find the earliest and latest dates contained in this canvasx range. |
8b83c6cc | 1283 | // Convert the call to date ranges of the raw data. |
ff022deb RK |
1284 | var minDate = this.toDataXCoord(lowX); |
1285 | var maxDate = this.toDataXCoord(highX); | |
8b83c6cc RK |
1286 | this.doZoomXDates_(minDate, maxDate); |
1287 | }; | |
6a1aa64f | 1288 | |
8b83c6cc | 1289 | /** |
b1a3b195 DV |
1290 | * Transition function to use in animations. Returns values between 0.0 |
1291 | * (totally old values) and 1.0 (totally new values) for each frame. | |
1292 | * @private | |
1293 | */ | |
1294 | Dygraph.zoomAnimationFunction = function(frame, numFrames) { | |
1295 | var k = 1.5; | |
1296 | return (1.0 - Math.pow(k, -frame)) / (1.0 - Math.pow(k, -numFrames)); | |
1297 | }; | |
1298 | ||
1299 | /** | |
8b83c6cc RK |
1300 | * Zoom to something containing [minDate, maxDate] values. Don't confuse this |
1301 | * method with doZoomX which accepts pixel coordinates. This function redraws | |
1302 | * the graph. | |
d58ae307 | 1303 | * |
8b83c6cc RK |
1304 | * @param {Number} minDate The minimum date that should be visible. |
1305 | * @param {Number} maxDate The maximum date that should be visible. | |
1306 | * @private | |
1307 | */ | |
1308 | Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) { | |
b1a3b195 DV |
1309 | // TODO(danvk): when yAxisRange is null (i.e. "fit to data", the animation |
1310 | // can produce strange effects. Rather than the y-axis transitioning slowly | |
1311 | // between values, it can jerk around.) | |
1312 | var old_window = this.xAxisRange(); | |
1313 | var new_window = [minDate, maxDate]; | |
57baab03 | 1314 | this.zoomed_x_ = true; |
b1a3b195 DV |
1315 | var that = this; |
1316 | this.doAnimatedZoom(old_window, new_window, null, null, function() { | |
1317 | if (that.attr_("zoomCallback")) { | |
1318 | that.attr_("zoomCallback")(minDate, maxDate, that.yAxisRanges()); | |
1319 | } | |
1320 | }); | |
8b83c6cc RK |
1321 | }; |
1322 | ||
1323 | /** | |
1324 | * Zoom to something containing [lowY, highY]. These are pixel coordinates in | |
d58ae307 DV |
1325 | * the canvas. This function redraws the graph. |
1326 | * | |
8b83c6cc RK |
1327 | * @param {Number} lowY The topmost pixel value that should be visible. |
1328 | * @param {Number} highY The lowest pixel value that should be visible. | |
1329 | * @private | |
1330 | */ | |
1331 | Dygraph.prototype.doZoomY_ = function(lowY, highY) { | |
920208fb | 1332 | this.currentZoomRectArgs_ = null; |
d58ae307 DV |
1333 | // Find the highest and lowest values in pixel range for each axis. |
1334 | // Note that lowY (in pixels) corresponds to the max Value (in data coords). | |
1335 | // This is because pixels increase as you go down on the screen, whereas data | |
1336 | // coordinates increase as you go up the screen. | |
b1a3b195 DV |
1337 | var oldValueRanges = this.yAxisRanges(); |
1338 | var newValueRanges = []; | |
d58ae307 | 1339 | for (var i = 0; i < this.axes_.length; i++) { |
ff022deb RK |
1340 | var hi = this.toDataYCoord(lowY, i); |
1341 | var low = this.toDataYCoord(highY, i); | |
b1a3b195 | 1342 | newValueRanges.push([low, hi]); |
d58ae307 | 1343 | } |
8b83c6cc | 1344 | |
57baab03 | 1345 | this.zoomed_y_ = true; |
b1a3b195 DV |
1346 | var that = this; |
1347 | this.doAnimatedZoom(null, null, oldValueRanges, newValueRanges, function() { | |
1348 | if (that.attr_("zoomCallback")) { | |
1349 | var xRange = that.xAxisRange(); | |
b1a3b195 DV |
1350 | that.attr_("zoomCallback")(xRange[0], xRange[1], that.yAxisRanges()); |
1351 | } | |
1352 | }); | |
8b83c6cc RK |
1353 | }; |
1354 | ||
1355 | /** | |
1356 | * Reset the zoom to the original view coordinates. This is the same as | |
1357 | * double-clicking on the graph. | |
d58ae307 | 1358 | * |
8b83c6cc RK |
1359 | * @private |
1360 | */ | |
1361 | Dygraph.prototype.doUnzoom_ = function() { | |
b1a3b195 | 1362 | var dirty = false, dirtyX = false, dirtyY = false; |
758a629f | 1363 | if (this.dateWindow_ !== null) { |
d58ae307 | 1364 | dirty = true; |
b1a3b195 | 1365 | dirtyX = true; |
8b83c6cc | 1366 | } |
d58ae307 DV |
1367 | |
1368 | for (var i = 0; i < this.axes_.length; i++) { | |
1f6a6254 | 1369 | if (typeof(this.axes_[i].valueWindow) !== 'undefined' && this.axes_[i].valueWindow !== null) { |
d58ae307 | 1370 | dirty = true; |
b1a3b195 | 1371 | dirtyY = true; |
d58ae307 | 1372 | } |
8b83c6cc RK |
1373 | } |
1374 | ||
da1369a5 DV |
1375 | // Clear any selection, since it's likely to be drawn in the wrong place. |
1376 | this.clearSelection(); | |
1377 | ||
8b83c6cc | 1378 | if (dirty) { |
57baab03 NN |
1379 | this.zoomed_x_ = false; |
1380 | this.zoomed_y_ = false; | |
b1a3b195 DV |
1381 | |
1382 | var minDate = this.rawData_[0][0]; | |
1383 | var maxDate = this.rawData_[this.rawData_.length - 1][0]; | |
1384 | ||
1385 | // With only one frame, don't bother calculating extreme ranges. | |
1386 | // TODO(danvk): merge this block w/ the code below. | |
1387 | if (!this.attr_("animatedZooms")) { | |
1388 | this.dateWindow_ = null; | |
758a629f DV |
1389 | for (i = 0; i < this.axes_.length; i++) { |
1390 | if (this.axes_[i].valueWindow !== null) { | |
b1a3b195 DV |
1391 | delete this.axes_[i].valueWindow; |
1392 | } | |
1393 | } | |
1394 | this.drawGraph_(); | |
1395 | if (this.attr_("zoomCallback")) { | |
1396 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); | |
1397 | } | |
1398 | return; | |
1399 | } | |
1400 | ||
1401 | var oldWindow=null, newWindow=null, oldValueRanges=null, newValueRanges=null; | |
1402 | if (dirtyX) { | |
1403 | oldWindow = this.xAxisRange(); | |
1404 | newWindow = [minDate, maxDate]; | |
1405 | } | |
1406 | ||
1407 | if (dirtyY) { | |
1408 | oldValueRanges = this.yAxisRanges(); | |
1409 | // TODO(danvk): this is pretty inefficient | |
1410 | var packed = this.gatherDatasets_(this.rolledSeries_, null); | |
1411 | var extremes = packed[1]; | |
1412 | ||
1413 | // this has the side-effect of modifying this.axes_. | |
1414 | // this doesn't make much sense in this context, but it's convenient (we | |
1415 | // need this.axes_[*].extremeValues) and not harmful since we'll be | |
1416 | // calling drawGraph_ shortly, which clobbers these values. | |
1417 | this.computeYAxisRanges_(extremes); | |
1418 | ||
1419 | newValueRanges = []; | |
758a629f | 1420 | for (i = 0; i < this.axes_.length; i++) { |
1f6a6254 US |
1421 | var axis = this.axes_[i]; |
1422 | newValueRanges.push(axis.valueRange != null ? axis.valueRange : axis.extremeRange); | |
b1a3b195 DV |
1423 | } |
1424 | } | |
1425 | ||
1426 | var that = this; | |
1427 | this.doAnimatedZoom(oldWindow, newWindow, oldValueRanges, newValueRanges, | |
1428 | function() { | |
1429 | that.dateWindow_ = null; | |
1430 | for (var i = 0; i < that.axes_.length; i++) { | |
758a629f | 1431 | if (that.axes_[i].valueWindow !== null) { |
b1a3b195 DV |
1432 | delete that.axes_[i].valueWindow; |
1433 | } | |
1434 | } | |
1435 | if (that.attr_("zoomCallback")) { | |
1436 | that.attr_("zoomCallback")(minDate, maxDate, that.yAxisRanges()); | |
1437 | } | |
1438 | }); | |
1439 | } | |
1440 | }; | |
1441 | ||
1442 | /** | |
1443 | * Combined animation logic for all zoom functions. | |
1444 | * either the x parameters or y parameters may be null. | |
1445 | * @private | |
1446 | */ | |
1447 | Dygraph.prototype.doAnimatedZoom = function(oldXRange, newXRange, oldYRanges, newYRanges, callback) { | |
1448 | var steps = this.attr_("animatedZooms") ? Dygraph.ANIMATION_STEPS : 1; | |
1449 | ||
1450 | var windows = []; | |
1451 | var valueRanges = []; | |
758a629f | 1452 | var step, frac; |
b1a3b195 | 1453 | |
758a629f DV |
1454 | if (oldXRange !== null && newXRange !== null) { |
1455 | for (step = 1; step <= steps; step++) { | |
1456 | frac = Dygraph.zoomAnimationFunction(step, steps); | |
b1a3b195 DV |
1457 | windows[step-1] = [oldXRange[0]*(1-frac) + frac*newXRange[0], |
1458 | oldXRange[1]*(1-frac) + frac*newXRange[1]]; | |
8b83c6cc | 1459 | } |
67e650dc | 1460 | } |
b1a3b195 | 1461 | |
758a629f DV |
1462 | if (oldYRanges !== null && newYRanges !== null) { |
1463 | for (step = 1; step <= steps; step++) { | |
1464 | frac = Dygraph.zoomAnimationFunction(step, steps); | |
b1a3b195 DV |
1465 | var thisRange = []; |
1466 | for (var j = 0; j < this.axes_.length; j++) { | |
1467 | thisRange.push([oldYRanges[j][0]*(1-frac) + frac*newYRanges[j][0], | |
1468 | oldYRanges[j][1]*(1-frac) + frac*newYRanges[j][1]]); | |
1469 | } | |
1470 | valueRanges[step-1] = thisRange; | |
1471 | } | |
1472 | } | |
1473 | ||
1474 | var that = this; | |
1475 | Dygraph.repeatAndCleanup(function(step) { | |
1476 | if (valueRanges.length) { | |
1477 | for (var i = 0; i < that.axes_.length; i++) { | |
1478 | var w = valueRanges[step][i]; | |
1479 | that.axes_[i].valueWindow = [w[0], w[1]]; | |
1480 | } | |
1481 | } | |
1482 | if (windows.length) { | |
1483 | that.dateWindow_ = windows[step]; | |
1484 | } | |
1485 | that.drawGraph_(); | |
1486 | }, steps, Dygraph.ANIMATION_DURATION / steps, callback); | |
6a1aa64f DV |
1487 | }; |
1488 | ||
1489 | /** | |
857a6931 KW |
1490 | * Get the current graph's area object. |
1491 | * | |
1492 | * Returns: {x, y, w, h} | |
6a1aa64f | 1493 | */ |
857a6931 KW |
1494 | Dygraph.prototype.getArea = function() { |
1495 | return this.plotter_.area; | |
1496 | }; | |
e863a17d | 1497 | |
857a6931 KW |
1498 | /** |
1499 | * Convert a mouse event to DOM coordinates relative to the graph origin. | |
1500 | * | |
1501 | * Returns a two-element array: [X, Y]. | |
1502 | */ | |
1503 | Dygraph.prototype.eventToDomCoords = function(event) { | |
4cac8c7a | 1504 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_); |
857a6931 KW |
1505 | var canvasy = Dygraph.pageY(event) - Dygraph.findPosY(this.mouseEventElement_); |
1506 | return [canvasx, canvasy]; | |
1507 | }; | |
4cac8c7a | 1508 | |
857a6931 KW |
1509 | /** |
1510 | * Given a canvas X coordinate, find the closest row. | |
1511 | * @param {Number} domX graph-relative DOM X coordinate | |
1512 | * Returns: row number, integer | |
1513 | * @private | |
1514 | */ | |
1515 | Dygraph.prototype.findClosestRow = function(domX) { | |
81cb07d6 | 1516 | var minDistX = Infinity; |
6a1aa64f | 1517 | var idx = -1; |
857a6931 KW |
1518 | var points = this.layout_.points; |
1519 | var l = points.length; | |
1520 | for (var i = 0; i < l; i++) { | |
8a7cc60e | 1521 | var point = points[i]; |
04c104d7 | 1522 | if (!Dygraph.isValidPoint(point, true)) continue; |
857a6931 | 1523 | var dist = Math.abs(point.canvasx - domX); |
81cb07d6 | 1524 | if (dist < minDistX) { |
a937d031 KW |
1525 | minDistX = dist; |
1526 | idx = i; | |
1527 | } | |
6a1aa64f | 1528 | } |
857a6931 KW |
1529 | return this.idxToRow_(idx); |
1530 | }; | |
6a1aa64f | 1531 | |
857a6931 | 1532 | /** |
2a02e5dd KW |
1533 | * Given canvas X,Y coordinates, find the closest point. |
1534 | * | |
1535 | * This finds the individual data point across all visible series | |
1536 | * that's closest to the supplied DOM coordinates using the standard | |
1537 | * Euclidean X,Y distance. | |
1538 | * | |
857a6931 KW |
1539 | * @param {Number} domX graph-relative DOM X coordinate |
1540 | * @param {Number} domY graph-relative DOM Y coordinate | |
1541 | * Returns: {row, seriesName, point} | |
1542 | * @private | |
1543 | */ | |
1544 | Dygraph.prototype.findClosestPoint = function(domX, domY) { | |
81cb07d6 | 1545 | var minDist = Infinity; |
857a6931 KW |
1546 | var idx = -1; |
1547 | var points = this.layout_.points; | |
1548 | var dist, dx, dy, point, closestPoint, closestSeries; | |
1549 | for (var setIdx = 0; setIdx < this.layout_.datasets.length; ++setIdx) { | |
1550 | var first = this.layout_.setPointsOffsets[setIdx]; | |
1551 | var len = this.layout_.setPointsLengths[setIdx]; | |
1552 | for (var i = 0; i < len; ++i) { | |
1553 | var point = points[first + i]; | |
62c3d2fd | 1554 | if (!Dygraph.isValidPoint(point)) continue; |
857a6931 KW |
1555 | dx = point.canvasx - domX; |
1556 | dy = point.canvasy - domY; | |
1557 | dist = dx * dx + dy * dy; | |
81cb07d6 | 1558 | if (dist < minDist) { |
62c3d2fd | 1559 | minDist = dist; |
a937d031 KW |
1560 | closestPoint = point; |
1561 | closestSeries = setIdx; | |
1562 | idx = i; | |
1563 | } | |
857a6931 KW |
1564 | } |
1565 | } | |
1566 | var name = this.layout_.setNames[closestSeries]; | |
1567 | return { | |
81cb07d6 | 1568 | row: idx + this.getLeftBoundary_(), |
857a6931 KW |
1569 | seriesName: name, |
1570 | point: closestPoint | |
1571 | }; | |
1572 | }; | |
1573 | ||
1574 | /** | |
1575 | * Given canvas X,Y coordinates, find the touched area in a stacked graph. | |
2a02e5dd KW |
1576 | * |
1577 | * This first finds the X data point closest to the supplied DOM X coordinate, | |
1578 | * then finds the series which puts the Y coordinate on top of its filled area, | |
1579 | * using linear interpolation between adjacent point pairs. | |
1580 | * | |
857a6931 KW |
1581 | * @param {Number} domX graph-relative DOM X coordinate |
1582 | * @param {Number} domY graph-relative DOM Y coordinate | |
1583 | * Returns: {row, seriesName, point} | |
1584 | * @private | |
1585 | */ | |
1586 | Dygraph.prototype.findStackedPoint = function(domX, domY) { | |
1587 | var row = this.findClosestRow(domX); | |
81cb07d6 KW |
1588 | var boundary = this.getLeftBoundary_(); |
1589 | var rowIdx = row - boundary; | |
857a6931 KW |
1590 | var points = this.layout_.points; |
1591 | var closestPoint, closestSeries; | |
1592 | for (var setIdx = 0; setIdx < this.layout_.datasets.length; ++setIdx) { | |
1593 | var first = this.layout_.setPointsOffsets[setIdx]; | |
1594 | var len = this.layout_.setPointsLengths[setIdx]; | |
81cb07d6 KW |
1595 | if (rowIdx >= len) continue; |
1596 | var p1 = points[first + rowIdx]; | |
62c3d2fd | 1597 | if (!Dygraph.isValidPoint(p1)) continue; |
857a6931 | 1598 | var py = p1.canvasy; |
81cb07d6 | 1599 | if (domX > p1.canvasx && rowIdx + 1 < len) { |
857a6931 | 1600 | // interpolate series Y value using next point |
81cb07d6 | 1601 | var p2 = points[first + rowIdx + 1]; |
62c3d2fd KW |
1602 | if (Dygraph.isValidPoint(p2)) { |
1603 | var dx = p2.canvasx - p1.canvasx; | |
1604 | if (dx > 0) { | |
1605 | var r = (domX - p1.canvasx) / dx; | |
1606 | py += r * (p2.canvasy - p1.canvasy); | |
1607 | } | |
416b05ad | 1608 | } |
81cb07d6 | 1609 | } else if (domX < p1.canvasx && rowIdx > 0) { |
857a6931 | 1610 | // interpolate series Y value using previous point |
81cb07d6 | 1611 | var p0 = points[first + rowIdx - 1]; |
62c3d2fd KW |
1612 | if (Dygraph.isValidPoint(p0)) { |
1613 | var dx = p1.canvasx - p0.canvasx; | |
1614 | if (dx > 0) { | |
1615 | var r = (p1.canvasx - domX) / dx; | |
1616 | py += r * (p0.canvasy - p1.canvasy); | |
1617 | } | |
12e4c741 | 1618 | } |
6a1aa64f | 1619 | } |
857a6931 | 1620 | // Stop if the point (domX, py) is above this series' upper edge |
a937d031 KW |
1621 | if (setIdx == 0 || py < domY) { |
1622 | closestPoint = p1; | |
1623 | closestSeries = setIdx; | |
1624 | } | |
6a1aa64f | 1625 | } |
857a6931 KW |
1626 | var name = this.layout_.setNames[closestSeries]; |
1627 | return { | |
1628 | row: row, | |
1629 | seriesName: name, | |
1630 | point: closestPoint | |
1631 | }; | |
1632 | }; | |
6a1aa64f | 1633 | |
857a6931 | 1634 | /** |
6a1aa64f DV |
1635 | * When the mouse moves in the canvas, display information about a nearby data |
1636 | * point and draw dots over those points in the data series. This function | |
1637 | * takes care of cleanup of previously-drawn dots. | |
1638 | * @param {Object} event The mousemove event from the browser. | |
1639 | * @private | |
1640 | */ | |
285a6bda | 1641 | Dygraph.prototype.mouseMove_ = function(event) { |
e863a17d | 1642 | // This prevents JS errors when mousing over the canvas before data loads. |
4cac8c7a | 1643 | var points = this.layout_.points; |
685ebbb3 | 1644 | if (points === undefined) return; |
e863a17d | 1645 | |
857a6931 KW |
1646 | var canvasCoords = this.eventToDomCoords(event); |
1647 | var canvasx = canvasCoords[0]; | |
1648 | var canvasy = canvasCoords[1]; | |
6a1aa64f | 1649 | |
857a6931 KW |
1650 | var highlightSeriesOpts = this.attr_("highlightSeriesOpts"); |
1651 | var selectionChanged = false; | |
1652 | if (highlightSeriesOpts) { | |
1653 | var closest; | |
1654 | if (this.attr_("stackedGraph")) { | |
1655 | closest = this.findStackedPoint(canvasx, canvasy); | |
1656 | } else { | |
1657 | closest = this.findClosestPoint(canvasx, canvasy); | |
43af96e7 | 1658 | } |
857a6931 | 1659 | selectionChanged = this.setSelection(closest.row, closest.seriesName); |
416b05ad | 1660 | } else { |
857a6931 KW |
1661 | var idx = this.findClosestRow(canvasx); |
1662 | selectionChanged = this.setSelection(idx); | |
12e4c741 | 1663 | } |
43af96e7 | 1664 | |
857a6931 KW |
1665 | var callback = this.attr_("highlightCallback"); |
1666 | if (callback && selectionChanged) { | |
1667 | callback(event, this.lastx_, this.selPoints_, this.lastRow_, this.highlightSet_); | |
12e4c741 | 1668 | } |
239c712d | 1669 | }; |
b258a3da | 1670 | |
239c712d | 1671 | /** |
81cb07d6 KW |
1672 | * Fetch left offset from first defined boundaryIds record (see bug #236). |
1673 | */ | |
1674 | Dygraph.prototype.getLeftBoundary_ = function() { | |
1675 | for (var i = 0; i < this.boundaryIds_.length; i++) { | |
1676 | if (this.boundaryIds_[i] !== undefined) { | |
1677 | return this.boundaryIds_[i][0]; | |
1678 | } | |
1679 | } | |
1680 | return 0; | |
1681 | }; | |
1682 | ||
1683 | /** | |
1903f1e4 | 1684 | * Transforms layout_.points index into data row number. |
2ddb1197 | 1685 | * @param int layout_.points index |
1903f1e4 | 1686 | * @return int row number, or -1 if none could be found. |
2ddb1197 SC |
1687 | * @private |
1688 | */ | |
1689 | Dygraph.prototype.idxToRow_ = function(idx) { | |
1903f1e4 | 1690 | if (idx < 0) return -1; |
2ddb1197 | 1691 | |
81cb07d6 | 1692 | var boundary = this.getLeftBoundary_(); |
82c6fe4d KW |
1693 | for (var setIdx = 0; setIdx < this.layout_.datasets.length; ++setIdx) { |
1694 | var set = this.layout_.datasets[setIdx]; | |
1695 | if (idx < set.length) { | |
81cb07d6 | 1696 | return boundary + idx; |
1903f1e4 | 1697 | } |
82c6fe4d | 1698 | idx -= set.length; |
1903f1e4 DV |
1699 | } |
1700 | return -1; | |
1701 | }; | |
2ddb1197 | 1702 | |
629a09ae DV |
1703 | /** |
1704 | * @private | |
79253bd0 | 1705 | * Generates legend html dash for any stroke pattern. It will try to scale the |
1706 | * pattern to fit in 1em width. Or if small enough repeat the partern for 1em | |
1707 | * width. | |
1708 | * @param strokePattern The pattern | |
1709 | * @param color The color of the series. | |
1710 | * @param oneEmWidth The width in pixels of 1em in the legend. | |
1711 | */ | |
1712 | Dygraph.prototype.generateLegendDashHTML_ = function(strokePattern, color, oneEmWidth) { | |
1713 | var dash = ""; | |
1714 | var i, j, paddingLeft, marginRight; | |
1715 | var strokePixelLength = 0, segmentLoop = 0; | |
1716 | var normalizedPattern = []; | |
1717 | var loop; | |
1718 | // IE 7,8 fail at these divs, so they get boring legend, have not tested 9. | |
1719 | var isIE = (/MSIE/.test(navigator.userAgent) && !window.opera); | |
1720 | if(isIE) { | |
1721 | return "—"; | |
1722 | } | |
1723 | if (!strokePattern || strokePattern.length <= 1) { | |
1724 | // Solid line | |
1725 | dash = "<div style=\"display: inline-block; position: relative; " + | |
1726 | "bottom: .5ex; padding-left: 1em; height: 1px; " + | |
1727 | "border-bottom: 2px solid " + color + ";\"></div>"; | |
1728 | } else { | |
1729 | // Compute the length of the pixels including the first segment twice, | |
1730 | // since we repeat it. | |
1731 | for (i = 0; i <= strokePattern.length; i++) { | |
1732 | strokePixelLength += strokePattern[i%strokePattern.length]; | |
1733 | } | |
1734 | ||
1735 | // See if we can loop the pattern by itself at least twice. | |
1736 | loop = Math.floor(oneEmWidth/(strokePixelLength-strokePattern[0])); | |
1737 | if (loop > 1) { | |
1738 | // This pattern fits at least two times, no scaling just convert to em; | |
1739 | for (i = 0; i < strokePattern.length; i++) { | |
1740 | normalizedPattern[i] = strokePattern[i]/oneEmWidth; | |
1741 | } | |
1742 | // Since we are repeating the pattern, we don't worry about repeating the | |
1743 | // first segment in one draw. | |
1744 | segmentLoop = normalizedPattern.length; | |
1745 | } else { | |
1746 | // If the pattern doesn't fit in the legend we scale it to fit. | |
1747 | loop = 1; | |
1748 | for (i = 0; i < strokePattern.length; i++) { | |
1749 | normalizedPattern[i] = strokePattern[i]/strokePixelLength; | |
1750 | } | |
1751 | // For the scaled patterns we do redraw the first segment. | |
1752 | segmentLoop = normalizedPattern.length+1; | |
1753 | } | |
1754 | // Now make the pattern. | |
1755 | for (j = 0; j < loop; j++) { | |
1756 | for (i = 0; i < segmentLoop; i+=2) { | |
1757 | // The padding is the drawn segment. | |
1758 | paddingLeft = normalizedPattern[i%normalizedPattern.length]; | |
1759 | if (i < strokePattern.length) { | |
1760 | // The margin is the space segment. | |
1761 | marginRight = normalizedPattern[(i+1)%normalizedPattern.length]; | |
1762 | } else { | |
1763 | // The repeated first segment has no right margin. | |
1764 | marginRight = 0; | |
1765 | } | |
1766 | dash += "<div style=\"display: inline-block; position: relative; " + | |
1767 | "bottom: .5ex; margin-right: " + marginRight + "em; padding-left: " + | |
1768 | paddingLeft + "em; height: 1px; border-bottom: 2px solid " + color + | |
1769 | ";\"></div>"; | |
1770 | } | |
1771 | } | |
1772 | } | |
1773 | return dash; | |
1774 | }; | |
1775 | ||
1776 | /** | |
1777 | * @private | |
629a09ae DV |
1778 | * Generates HTML for the legend which is displayed when hovering over the |
1779 | * chart. If no selected points are specified, a default legend is returned | |
1780 | * (this may just be the empty string). | |
1781 | * @param { Number } [x] The x-value of the selected points. | |
1782 | * @param { [Object] } [sel_points] List of selected points for the given | |
1783 | * x-value. Should have properties like 'name', 'yval' and 'canvasy'. | |
79253bd0 | 1784 | * @param { Number } [oneEmWidth] The pixel width for 1em in the legend. |
629a09ae | 1785 | */ |
79253bd0 | 1786 | Dygraph.prototype.generateLegendHTML_ = function(x, sel_points, oneEmWidth) { |
2fccd3dc DV |
1787 | // If no points are selected, we display a default legend. Traditionally, |
1788 | // this has been blank. But a better default would be a conventional legend, | |
1789 | // which provides essential information for a non-interactive chart. | |
79253bd0 | 1790 | var html, sepLines, i, c, dash, strokePattern; |
2fccd3dc DV |
1791 | if (typeof(x) === 'undefined') { |
1792 | if (this.attr_('legend') != 'always') return ''; | |
1793 | ||
758a629f | 1794 | sepLines = this.attr_('labelsSeparateLines'); |
2fccd3dc | 1795 | var labels = this.attr_('labels'); |
758a629f DV |
1796 | html = ''; |
1797 | for (i = 1; i < labels.length; i++) { | |
352c8310 | 1798 | if (!this.visibility()[i - 1]) continue; |
758a629f DV |
1799 | c = this.plotter_.colors[labels[i]]; |
1800 | if (html !== '') html += (sepLines ? '<br/>' : ' '); | |
79253bd0 | 1801 | strokePattern = this.attr_("strokePattern", labels[i]); |
1802 | dash = this.generateLegendDashHTML_(strokePattern, c, oneEmWidth); | |
857a6931 | 1803 | html += "<span style='font-weight: bold; color: " + c + ";'>" + dash + |
79253bd0 | 1804 | " " + labels[i] + "</span>"; |
2fccd3dc DV |
1805 | } |
1806 | return html; | |
1807 | } | |
1808 | ||
48e614ac DV |
1809 | var xOptView = this.optionsViewForAxis_('x'); |
1810 | var xvf = xOptView('valueFormatter'); | |
758a629f | 1811 | html = xvf(x, xOptView, this.attr_('labels')[0], this) + ":"; |
e9fe4a2f | 1812 | |
48e614ac DV |
1813 | var yOptViews = []; |
1814 | var num_axes = this.numAxes(); | |
758a629f | 1815 | for (i = 0; i < num_axes; i++) { |
48e614ac DV |
1816 | yOptViews[i] = this.optionsViewForAxis_('y' + (i ? 1 + i : '')); |
1817 | } | |
e9fe4a2f | 1818 | var showZeros = this.attr_("labelsShowZeroValues"); |
758a629f DV |
1819 | sepLines = this.attr_("labelsSeparateLines"); |
1820 | for (i = 0; i < this.selPoints_.length; i++) { | |
e9fe4a2f | 1821 | var pt = this.selPoints_[i]; |
758a629f | 1822 | if (pt.yval === 0 && !showZeros) continue; |
e9fe4a2f DV |
1823 | if (!Dygraph.isOK(pt.canvasy)) continue; |
1824 | if (sepLines) html += "<br/>"; | |
1825 | ||
48e614ac DV |
1826 | var yOptView = yOptViews[this.seriesToAxisMap_[pt.name]]; |
1827 | var fmtFunc = yOptView('valueFormatter'); | |
758a629f | 1828 | c = this.plotter_.colors[pt.name]; |
48e614ac DV |
1829 | var yval = fmtFunc(pt.yval, yOptView, pt.name, this); |
1830 | ||
857a6931 | 1831 | var cls = (pt.name == this.highlightSet_) ? " class='highlight'" : ""; |
2fccd3dc | 1832 | // TODO(danvk): use a template string here and make it an attribute. |
857a6931 KW |
1833 | html += "<span" + cls + ">" + " <b><span style='color: " + c + ";'>" + pt.name + |
1834 | "</span></b>:" + yval + "</span>"; | |
e9fe4a2f DV |
1835 | } |
1836 | return html; | |
1837 | }; | |
1838 | ||
629a09ae DV |
1839 | /** |
1840 | * @private | |
1841 | * Displays information about the selected points in the legend. If there is no | |
1842 | * selection, the legend will be cleared. | |
1843 | * @param { Number } [x] The x-value of the selected points. | |
1844 | * @param { [Object] } [sel_points] List of selected points for the given | |
1845 | * x-value. Should have properties like 'name', 'yval' and 'canvasy'. | |
1846 | */ | |
91c10d9c | 1847 | Dygraph.prototype.setLegendHTML_ = function(x, sel_points) { |
91c10d9c | 1848 | var labelsDiv = this.attr_("labelsDiv"); |
e0ff43a1 DV |
1849 | if (!labelsDiv) return; |
1850 | ||
79253bd0 | 1851 | var sizeSpan = document.createElement('span'); |
1852 | // Calculates the width of 1em in pixels for the legend. | |
1853 | sizeSpan.setAttribute('style', 'margin: 0; padding: 0 0 0 1em; border: 0;'); | |
1854 | labelsDiv.appendChild(sizeSpan); | |
1855 | var oneEmWidth=sizeSpan.offsetWidth; | |
1856 | ||
1857 | var html = this.generateLegendHTML_(x, sel_points, oneEmWidth); | |
91c10d9c DV |
1858 | if (labelsDiv !== null) { |
1859 | labelsDiv.innerHTML = html; | |
1860 | } else { | |
1861 | if (typeof(this.shown_legend_error_) == 'undefined') { | |
1862 | this.error('labelsDiv is set to something nonexistent; legend will not be shown.'); | |
1863 | this.shown_legend_error_ = true; | |
1864 | } | |
1865 | } | |
1866 | }; | |
1867 | ||
857a6931 KW |
1868 | Dygraph.prototype.animateSelection_ = function(direction) { |
1869 | var totalSteps = 10; | |
1870 | var millis = 30; | |
1d44ee5e KW |
1871 | if (this.fadeLevel === undefined) this.fadeLevel = 0; |
1872 | if (this.animateId === undefined) this.animateId = 0; | |
857a6931 KW |
1873 | var start = this.fadeLevel; |
1874 | var steps = direction < 0 ? start : totalSteps - start; | |
1875 | if (steps <= 0) { | |
1876 | if (this.fadeLevel) { | |
1877 | this.updateSelection_(1.0); | |
1878 | } | |
1879 | return; | |
1880 | } | |
1881 | ||
1882 | var thisId = ++this.animateId; | |
1883 | var that = this; | |
475f7420 KW |
1884 | Dygraph.repeatAndCleanup( |
1885 | function(n) { | |
1886 | // ignore simultaneous animations | |
1887 | if (that.animateId != thisId) return; | |
1888 | ||
1889 | that.fadeLevel += direction; | |
1890 | if (that.fadeLevel === 0) { | |
1891 | that.clearSelection(); | |
1892 | } else { | |
1893 | that.updateSelection_(that.fadeLevel / totalSteps); | |
1894 | } | |
1895 | }, | |
1896 | steps, millis, function() {}); | |
857a6931 KW |
1897 | }; |
1898 | ||
2ddb1197 | 1899 | /** |
239c712d NAG |
1900 | * Draw dots over the selectied points in the data series. This function |
1901 | * takes care of cleanup of previously-drawn dots. | |
1902 | * @private | |
1903 | */ | |
857a6931 | 1904 | Dygraph.prototype.updateSelection_ = function(opt_animFraction) { |
6a1aa64f | 1905 | // Clear the previously drawn vertical, if there is one |
758a629f | 1906 | var i; |
2cf95fff | 1907 | var ctx = this.canvas_ctx_; |
857a6931 KW |
1908 | if (this.attr_('highlightSeriesOpts')) { |
1909 | ctx.clearRect(0, 0, this.width_, this.height_); | |
afdb20d8 | 1910 | var alpha = 1.0 - this.attr_('highlightSeriesBackgroundAlpha'); |
857a6931 | 1911 | if (alpha) { |
2a02e5dd KW |
1912 | // Activating background fade includes an animation effect for a gradual |
1913 | // fade. TODO(klausw): make this independently configurable if it causes | |
1914 | // issues? Use a shared preference to control animations? | |
1915 | var animateBackgroundFade = true; | |
1916 | if (animateBackgroundFade) { | |
857a6931 KW |
1917 | if (opt_animFraction === undefined) { |
1918 | // start a new animation | |
1919 | this.animateSelection_(1); | |
1920 | return; | |
1921 | } | |
1922 | alpha *= opt_animFraction; | |
1923 | } | |
1924 | ctx.fillStyle = 'rgba(255,255,255,' + alpha + ')'; | |
1925 | ctx.fillRect(0, 0, this.width_, this.height_); | |
1926 | } | |
1927 | var setIdx = this.datasetIndexFromSetName_(this.highlightSet_); | |
857a6931 KW |
1928 | this.plotter_._drawLine(ctx, setIdx); |
1929 | } else if (this.previousVerticalX_ >= 0) { | |
46dde5f9 DV |
1930 | // Determine the maximum highlight circle size. |
1931 | var maxCircleSize = 0; | |
227b93cc | 1932 | var labels = this.attr_('labels'); |
758a629f | 1933 | for (i = 1; i < labels.length; i++) { |
227b93cc | 1934 | var r = this.attr_('highlightCircleSize', labels[i]); |
46dde5f9 DV |
1935 | if (r > maxCircleSize) maxCircleSize = r; |
1936 | } | |
6a1aa64f | 1937 | var px = this.previousVerticalX_; |
46dde5f9 DV |
1938 | ctx.clearRect(px - maxCircleSize - 1, 0, |
1939 | 2 * maxCircleSize + 2, this.height_); | |
6a1aa64f DV |
1940 | } |
1941 | ||
920208fb PF |
1942 | if (this.isUsingExcanvas_ && this.currentZoomRectArgs_) { |
1943 | Dygraph.prototype.drawZoomRect_.apply(this, this.currentZoomRectArgs_); | |
1944 | } | |
1945 | ||
d160cc3b | 1946 | if (this.selPoints_.length > 0) { |
6a1aa64f | 1947 | // Set the status message to indicate the selected point(s) |
d160cc3b | 1948 | if (this.attr_('showLabelsOnHighlight')) { |
91c10d9c | 1949 | this.setLegendHTML_(this.lastx_, this.selPoints_); |
6a1aa64f | 1950 | } |
6a1aa64f | 1951 | |
6a1aa64f | 1952 | // Draw colored circles over the center of each selected point |
e9fe4a2f | 1953 | var canvasx = this.selPoints_[0].canvasx; |
43af96e7 | 1954 | ctx.save(); |
758a629f | 1955 | for (i = 0; i < this.selPoints_.length; i++) { |
e9fe4a2f DV |
1956 | var pt = this.selPoints_[i]; |
1957 | if (!Dygraph.isOK(pt.canvasy)) continue; | |
1958 | ||
1959 | var circleSize = this.attr_('highlightCircleSize', pt.name); | |
5879307d | 1960 | var callback = this.attr_("drawHighlightPointCallback", pt.name); |
a8ef67a8 | 1961 | var color = this.plotter_.colors[pt.name]; |
78e58af4 RK |
1962 | if (!callback) { |
1963 | callback = Dygraph.Circles.DEFAULT; | |
1964 | } | |
a8ef67a8 KW |
1965 | ctx.lineWidth = this.attr_('strokeWidth', pt.name); |
1966 | ctx.strokeStyle = color; | |
1967 | ctx.fillStyle = color; | |
78e58af4 | 1968 | callback(this.g, pt.name, ctx, canvasx, pt.canvasy, |
a8ef67a8 | 1969 | color, circleSize); |
6a1aa64f DV |
1970 | } |
1971 | ctx.restore(); | |
1972 | ||
1973 | this.previousVerticalX_ = canvasx; | |
1974 | } | |
1975 | }; | |
1976 | ||
1977 | /** | |
629a09ae DV |
1978 | * Manually set the selected points and display information about them in the |
1979 | * legend. The selection can be cleared using clearSelection() and queried | |
1980 | * using getSelection(). | |
1981 | * @param { Integer } row number that should be highlighted (i.e. appear with | |
1982 | * hover dots on the chart). Set to false to clear any selection. | |
857a6931 KW |
1983 | * @param { seriesName } optional series name to highlight that series with the |
1984 | * the highlightSeriesOpts setting. | |
239c712d | 1985 | */ |
857a6931 | 1986 | Dygraph.prototype.setSelection = function(row, opt_seriesName) { |
239c712d NAG |
1987 | // Extract the points we've selected |
1988 | this.selPoints_ = []; | |
1989 | var pos = 0; | |
50360fd0 | 1990 | |
239c712d | 1991 | if (row !== false) { |
81cb07d6 | 1992 | row -= this.getLeftBoundary_(); |
16269f6e | 1993 | } |
50360fd0 | 1994 | |
857a6931 | 1995 | var changed = false; |
16269f6e | 1996 | if (row !== false && row >= 0) { |
857a6931 KW |
1997 | if (row != this.lastRow_) changed = true; |
1998 | this.lastRow_ = row; | |
82c6fe4d KW |
1999 | for (var setIdx = 0; setIdx < this.layout_.datasets.length; ++setIdx) { |
2000 | var set = this.layout_.datasets[setIdx]; | |
2001 | if (row < set.length) { | |
38f33a44 | 2002 | var point = this.layout_.points[pos+row]; |
ccd9d7c2 | 2003 | |
38f33a44 | 2004 | if (this.attr_("stackedGraph")) { |
8c03ba63 | 2005 | point = this.layout_.unstackPointAtIndex(pos+row); |
38f33a44 | 2006 | } |
ccd9d7c2 | 2007 | |
04c104d7 | 2008 | if (!(point.yval === null)) this.selPoints_.push(point); |
16269f6e | 2009 | } |
82c6fe4d | 2010 | pos += set.length; |
239c712d | 2011 | } |
857a6931 KW |
2012 | } else { |
2013 | if (this.lastRow_ >= 0) changed = true; | |
2014 | this.lastRow_ = -1; | |
16269f6e | 2015 | } |
50360fd0 | 2016 | |
16269f6e | 2017 | if (this.selPoints_.length) { |
239c712d | 2018 | this.lastx_ = this.selPoints_[0].xval; |
239c712d | 2019 | } else { |
857a6931 | 2020 | this.lastx_ = -1; |
239c712d NAG |
2021 | } |
2022 | ||
857a6931 KW |
2023 | if (opt_seriesName !== undefined) { |
2024 | if (this.highlightSet_ !== opt_seriesName) changed = true; | |
2025 | this.highlightSet_ = opt_seriesName; | |
239c712d NAG |
2026 | } |
2027 | ||
857a6931 KW |
2028 | if (changed) { |
2029 | this.updateSelection_(undefined); | |
2030 | } | |
2031 | return changed; | |
239c712d NAG |
2032 | }; |
2033 | ||
2034 | /** | |
6a1aa64f DV |
2035 | * The mouse has left the canvas. Clear out whatever artifacts remain |
2036 | * @param {Object} event the mouseout event from the browser. | |
2037 | * @private | |
2038 | */ | |
285a6bda | 2039 | Dygraph.prototype.mouseOut_ = function(event) { |
a4c6a67c AV |
2040 | if (this.attr_("unhighlightCallback")) { |
2041 | this.attr_("unhighlightCallback")(event); | |
2042 | } | |
2043 | ||
43af96e7 | 2044 | if (this.attr_("hideOverlayOnMouseOut")) { |
239c712d | 2045 | this.clearSelection(); |
43af96e7 | 2046 | } |
6a1aa64f DV |
2047 | }; |
2048 | ||
239c712d | 2049 | /** |
629a09ae DV |
2050 | * Clears the current selection (i.e. points that were highlighted by moving |
2051 | * the mouse over the chart). | |
239c712d NAG |
2052 | */ |
2053 | Dygraph.prototype.clearSelection = function() { | |
2054 | // Get rid of the overlay data | |
857a6931 KW |
2055 | if (this.fadeLevel) { |
2056 | this.animateSelection_(-1); | |
2057 | return; | |
2058 | } | |
2cf95fff | 2059 | this.canvas_ctx_.clearRect(0, 0, this.width_, this.height_); |
857a6931 | 2060 | this.fadeLevel = 0; |
91c10d9c | 2061 | this.setLegendHTML_(); |
239c712d NAG |
2062 | this.selPoints_ = []; |
2063 | this.lastx_ = -1; | |
857a6931 KW |
2064 | this.lastRow_ = -1; |
2065 | this.highlightSet_ = null; | |
758a629f | 2066 | }; |
239c712d | 2067 | |
103b7292 | 2068 | /** |
629a09ae DV |
2069 | * Returns the number of the currently selected row. To get data for this row, |
2070 | * you can use the getValue method. | |
2071 | * @return { Integer } row number, or -1 if nothing is selected | |
103b7292 NAG |
2072 | */ |
2073 | Dygraph.prototype.getSelection = function() { | |
2074 | if (!this.selPoints_ || this.selPoints_.length < 1) { | |
2075 | return -1; | |
2076 | } | |
50360fd0 | 2077 | |
103b7292 NAG |
2078 | for (var row=0; row<this.layout_.points.length; row++ ) { |
2079 | if (this.layout_.points[row].x == this.selPoints_[0].x) { | |
81cb07d6 | 2080 | return row + this.getLeftBoundary_(); |
103b7292 NAG |
2081 | } |
2082 | } | |
2083 | return -1; | |
2e1fcf1a | 2084 | }; |
103b7292 | 2085 | |
857a6931 KW |
2086 | Dygraph.prototype.getHighlightSeries = function() { |
2087 | return this.highlightSet_; | |
2088 | }; | |
2089 | ||
19589a3e | 2090 | /** |
6a1aa64f DV |
2091 | * Fires when there's data available to be graphed. |
2092 | * @param {String} data Raw CSV data to be plotted | |
2093 | * @private | |
2094 | */ | |
285a6bda | 2095 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f | 2096 | this.rawData_ = this.parseCSV_(data); |
26ca7938 | 2097 | this.predraw_(); |
6a1aa64f DV |
2098 | }; |
2099 | ||
6a1aa64f DV |
2100 | /** |
2101 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
2102 | * @private | |
2103 | */ | |
285a6bda | 2104 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f | 2105 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
7201b11e | 2106 | var range; |
6a1aa64f | 2107 | if (this.dateWindow_) { |
7201b11e | 2108 | range = [this.dateWindow_[0], this.dateWindow_[1]]; |
6a1aa64f | 2109 | } else { |
395e98a3 | 2110 | range = this.fullXRange_(); |
7201b11e JB |
2111 | } |
2112 | ||
48e614ac DV |
2113 | var xAxisOptionsView = this.optionsViewForAxis_('x'); |
2114 | var xTicks = xAxisOptionsView('ticker')( | |
2115 | range[0], | |
2116 | range[1], | |
2117 | this.width_, // TODO(danvk): should be area.width | |
2118 | xAxisOptionsView, | |
2119 | this); | |
2120 | // var msg = 'ticker(' + range[0] + ', ' + range[1] + ', ' + this.width_ + ', ' + this.attr_('pixelsPerXLabel') + ') -> ' + JSON.stringify(xTicks); | |
2121 | // console.log(msg); | |
b2c9222a | 2122 | this.layout_.setXTicks(xTicks); |
32988383 DV |
2123 | }; |
2124 | ||
629a09ae DV |
2125 | /** |
2126 | * @private | |
2127 | * Computes the range of the data series (including confidence intervals). | |
2128 | * @param { [Array] } series either [ [x1, y1], [x2, y2], ... ] or | |
2129 | * [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... | |
2130 | * @return [low, high] | |
2131 | */ | |
5011e7a1 | 2132 | Dygraph.prototype.extremeValues_ = function(series) { |
758a629f | 2133 | var minY = null, maxY = null, j, y; |
5011e7a1 | 2134 | |
9922b78b | 2135 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
5011e7a1 DV |
2136 | if (bars) { |
2137 | // With custom bars, maxY is the max of the high values. | |
758a629f DV |
2138 | for (j = 0; j < series.length; j++) { |
2139 | y = series[j][1][0]; | |
5011e7a1 DV |
2140 | if (!y) continue; |
2141 | var low = y - series[j][1][1]; | |
2142 | var high = y + series[j][1][2]; | |
2143 | if (low > y) low = y; // this can happen with custom bars, | |
2144 | if (high < y) high = y; // e.g. in tests/custom-bars.html | |
758a629f | 2145 | if (maxY === null || high > maxY) { |
5011e7a1 DV |
2146 | maxY = high; |
2147 | } | |
758a629f | 2148 | if (minY === null || low < minY) { |
5011e7a1 DV |
2149 | minY = low; |
2150 | } | |
2151 | } | |
2152 | } else { | |
758a629f DV |
2153 | for (j = 0; j < series.length; j++) { |
2154 | y = series[j][1]; | |
d12999d3 | 2155 | if (y === null || isNaN(y)) continue; |
758a629f | 2156 | if (maxY === null || y > maxY) { |
5011e7a1 DV |
2157 | maxY = y; |
2158 | } | |
758a629f | 2159 | if (minY === null || y < minY) { |
5011e7a1 DV |
2160 | minY = y; |
2161 | } | |
2162 | } | |
2163 | } | |
2164 | ||
2165 | return [minY, maxY]; | |
2166 | }; | |
2167 | ||
6a1aa64f | 2168 | /** |
629a09ae | 2169 | * @private |
26ca7938 DV |
2170 | * This function is called once when the chart's data is changed or the options |
2171 | * dictionary is updated. It is _not_ called when the user pans or zooms. The | |
2172 | * idea is that values derived from the chart's data can be computed here, | |
2173 | * rather than every time the chart is drawn. This includes things like the | |
2174 | * number of axes, rolling averages, etc. | |
2175 | */ | |
2176 | Dygraph.prototype.predraw_ = function() { | |
7153e001 DV |
2177 | var start = new Date(); |
2178 | ||
26ca7938 DV |
2179 | // TODO(danvk): move more computations out of drawGraph_ and into here. |
2180 | this.computeYAxes_(); | |
2181 | ||
2182 | // Create a new plotter. | |
70c80071 | 2183 | if (this.plotter_) this.plotter_.clear(); |
26ca7938 | 2184 | this.plotter_ = new DygraphCanvasRenderer(this, |
2cf95fff RK |
2185 | this.hidden_, |
2186 | this.hidden_ctx_, | |
0e23cfc6 | 2187 | this.layout_); |
26ca7938 | 2188 | |
0abfbd7e DV |
2189 | // The roller sits in the bottom left corner of the chart. We don't know where |
2190 | // this will be until the options are available, so it's positioned here. | |
8c69de65 | 2191 | this.createRollInterface_(); |
26ca7938 | 2192 | |
0abfbd7e DV |
2193 | // Same thing applies for the labelsDiv. It's right edge should be flush with |
2194 | // the right edge of the charting area (which may not be the same as the right | |
2195 | // edge of the div, if we have two y-axes. | |
2196 | this.positionLabelsDiv_(); | |
2197 | ||
ccd9d7c2 PF |
2198 | if (this.rangeSelector_) { |
2199 | this.rangeSelector_.renderStaticLayer(); | |
2200 | } | |
2201 | ||
b1a3b195 DV |
2202 | // Convert the raw data (a 2D array) into the internal format and compute |
2203 | // rolling averages. | |
2204 | this.rolledSeries_ = [null]; // x-axis is the first series and it's special | |
395e98a3 | 2205 | for (var i = 1; i < this.numColumns(); i++) { |
04c104d7 KW |
2206 | var logScale = this.attr_('logscale', i); // TODO(klausw): this looks wrong |
2207 | var series = this.extractSeries_(this.rawData_, i, logScale); | |
b1a3b195 DV |
2208 | series = this.rollingAverage(series, this.rollPeriod_); |
2209 | this.rolledSeries_.push(series); | |
2210 | } | |
2211 | ||
26ca7938 DV |
2212 | // If the data or options have changed, then we'd better redraw. |
2213 | this.drawGraph_(); | |
4b4d1a63 DV |
2214 | |
2215 | // This is used to determine whether to do various animations. | |
2216 | var end = new Date(); | |
2217 | this.drawingTimeMs_ = (end - start); | |
26ca7938 DV |
2218 | }; |
2219 | ||
2220 | /** | |
b1a3b195 DV |
2221 | * Loop over all fields and create datasets, calculating extreme y-values for |
2222 | * each series and extreme x-indices as we go. | |
fc4e84fa | 2223 | * |
b1a3b195 DV |
2224 | * dateWindow is passed in as an explicit parameter so that we can compute |
2225 | * extreme values "speculatively", i.e. without actually setting state on the | |
2226 | * dygraph. | |
fc4e84fa | 2227 | * |
b1a3b195 DV |
2228 | * TODO(danvk): make this more of a true function |
2229 | * @return [ datasets, seriesExtremes, boundaryIds ] | |
6a1aa64f DV |
2230 | * @private |
2231 | */ | |
b1a3b195 DV |
2232 | Dygraph.prototype.gatherDatasets_ = function(rolledSeries, dateWindow) { |
2233 | var boundaryIds = []; | |
354e15ab DE |
2234 | var cumulative_y = []; // For stacked series. |
2235 | var datasets = []; | |
f09fc545 | 2236 | var extremes = {}; // series name -> [low, high] |
758a629f | 2237 | var i, j, k; |
f09fc545 | 2238 | |
b1a3b195 DV |
2239 | // Loop over the fields (series). Go from the last to the first, |
2240 | // because if they're stacked that's how we accumulate the values. | |
2241 | var num_series = rolledSeries.length - 1; | |
758a629f | 2242 | for (i = num_series; i >= 1; i--) { |
1cf11047 DV |
2243 | if (!this.visibility()[i - 1]) continue; |
2244 | ||
b1a3b195 | 2245 | // TODO(danvk): is this copy really necessary? |
6a1aa64f | 2246 | var series = []; |
758a629f | 2247 | for (j = 0; j < rolledSeries[i].length; j++) { |
b1a3b195 | 2248 | series.push(rolledSeries[i][j]); |
6a1aa64f | 2249 | } |
2f5e7e1a | 2250 | |
6a1aa64f | 2251 | // Prune down to the desired range, if necessary (for zooming) |
1a26f3fb DV |
2252 | // Because there can be lines going to points outside of the visible area, |
2253 | // we actually prune to visible points, plus one on either side. | |
9922b78b | 2254 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
b1a3b195 DV |
2255 | if (dateWindow) { |
2256 | var low = dateWindow[0]; | |
2257 | var high = dateWindow[1]; | |
6a1aa64f | 2258 | var pruned = []; |
1a26f3fb DV |
2259 | // TODO(danvk): do binary search instead of linear search. |
2260 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. | |
2261 | var firstIdx = null, lastIdx = null; | |
758a629f | 2262 | for (k = 0; k < series.length; k++) { |
1a26f3fb DV |
2263 | if (series[k][0] >= low && firstIdx === null) { |
2264 | firstIdx = k; | |
2265 | } | |
2266 | if (series[k][0] <= high) { | |
2267 | lastIdx = k; | |
6a1aa64f DV |
2268 | } |
2269 | } | |
1a26f3fb DV |
2270 | if (firstIdx === null) firstIdx = 0; |
2271 | if (firstIdx > 0) firstIdx--; | |
2272 | if (lastIdx === null) lastIdx = series.length - 1; | |
2273 | if (lastIdx < series.length - 1) lastIdx++; | |
b1a3b195 | 2274 | boundaryIds[i-1] = [firstIdx, lastIdx]; |
758a629f | 2275 | for (k = firstIdx; k <= lastIdx; k++) { |
1a26f3fb | 2276 | pruned.push(series[k]); |
6a1aa64f DV |
2277 | } |
2278 | series = pruned; | |
16269f6e | 2279 | } else { |
b1a3b195 | 2280 | boundaryIds[i-1] = [0, series.length-1]; |
6a1aa64f DV |
2281 | } |
2282 | ||
f09fc545 | 2283 | var seriesExtremes = this.extremeValues_(series); |
5011e7a1 | 2284 | |
6a1aa64f | 2285 | if (bars) { |
758a629f | 2286 | for (j=0; j<series.length; j++) { |
5061b42f DV |
2287 | series[j] = [series[j][0], |
2288 | series[j][1][0], | |
2289 | series[j][1][1], | |
2290 | series[j][1][2]]; | |
354e15ab | 2291 | } |
43af96e7 | 2292 | } else if (this.attr_("stackedGraph")) { |
43af96e7 NK |
2293 | var l = series.length; |
2294 | var actual_y; | |
758a629f | 2295 | for (j = 0; j < l; j++) { |
354e15ab DE |
2296 | // If one data set has a NaN, let all subsequent stacked |
2297 | // sets inherit the NaN -- only start at 0 for the first set. | |
2298 | var x = series[j][0]; | |
41b0f691 | 2299 | if (cumulative_y[x] === undefined) { |
354e15ab | 2300 | cumulative_y[x] = 0; |
41b0f691 | 2301 | } |
43af96e7 NK |
2302 | |
2303 | actual_y = series[j][1]; | |
04c104d7 KW |
2304 | if (actual_y === null) { |
2305 | series[j] = [x, null]; | |
2306 | continue; | |
2307 | } | |
2308 | ||
354e15ab | 2309 | cumulative_y[x] += actual_y; |
43af96e7 | 2310 | |
758a629f | 2311 | series[j] = [x, cumulative_y[x]]; |
43af96e7 | 2312 | |
41b0f691 DV |
2313 | if (cumulative_y[x] > seriesExtremes[1]) { |
2314 | seriesExtremes[1] = cumulative_y[x]; | |
2315 | } | |
2316 | if (cumulative_y[x] < seriesExtremes[0]) { | |
2317 | seriesExtremes[0] = cumulative_y[x]; | |
2318 | } | |
43af96e7 | 2319 | } |
6a1aa64f | 2320 | } |
354e15ab | 2321 | |
b1a3b195 DV |
2322 | var seriesName = this.attr_("labels")[i]; |
2323 | extremes[seriesName] = seriesExtremes; | |
354e15ab | 2324 | datasets[i] = series; |
6a1aa64f DV |
2325 | } |
2326 | ||
7d463f49 KW |
2327 | // For stacked graphs, a NaN value for any point in the sum should create a |
2328 | // clean gap in the graph. Back-propagate NaNs to all points at this X value. | |
2329 | if (this.attr_("stackedGraph")) { | |
2330 | for (k = datasets.length - 1; k >= 0; --k) { | |
2331 | // Use the first nonempty dataset to get X values. | |
2332 | if (!datasets[k]) continue; | |
2333 | for (j = 0; j < datasets[k].length; j++) { | |
2334 | var x = datasets[k][j][0]; | |
2335 | if (isNaN(cumulative_y[x])) { | |
2336 | // Set all Y values to NaN at that X value. | |
2337 | for (i = datasets.length - 1; i >= 0; i--) { | |
2338 | if (!datasets[i]) continue; | |
2339 | datasets[i][j][1] = NaN; | |
2340 | } | |
2341 | } | |
2342 | } | |
2343 | break; | |
2344 | } | |
2345 | } | |
2346 | ||
b1a3b195 DV |
2347 | return [ datasets, extremes, boundaryIds ]; |
2348 | }; | |
2349 | ||
2350 | /** | |
2351 | * Update the graph with new data. This method is called when the viewing area | |
2352 | * has changed. If the underlying data or options have changed, predraw_ will | |
2353 | * be called before drawGraph_ is called. | |
2354 | * | |
2355 | * clearSelection, when undefined or true, causes this.clearSelection to be | |
2356 | * called at the end of the draw operation. This should rarely be defined, | |
2357 | * and never true (that is it should be undefined most of the time, and | |
2358 | * rarely false.) | |
2359 | * | |
2360 | * @private | |
2361 | */ | |
2362 | Dygraph.prototype.drawGraph_ = function(clearSelection) { | |
2363 | var start = new Date(); | |
2364 | ||
2365 | if (typeof(clearSelection) === 'undefined') { | |
2366 | clearSelection = true; | |
2367 | } | |
2368 | ||
2369 | // This is used to set the second parameter to drawCallback, below. | |
2370 | var is_initial_draw = this.is_initial_draw_; | |
2371 | this.is_initial_draw_ = false; | |
2372 | ||
b1a3b195 DV |
2373 | this.layout_.removeAllDatasets(); |
2374 | this.setColors_(); | |
758a629f | 2375 | this.attrs_.pointSize = 0.5 * this.attr_('highlightCircleSize'); |
b1a3b195 DV |
2376 | |
2377 | var packed = this.gatherDatasets_(this.rolledSeries_, this.dateWindow_); | |
2378 | var datasets = packed[0]; | |
2379 | var extremes = packed[1]; | |
2380 | this.boundaryIds_ = packed[2]; | |
2381 | ||
82c6fe4d KW |
2382 | this.setIndexByName_ = {}; |
2383 | var labels = this.attr_("labels"); | |
2384 | if (labels.length > 0) { | |
2385 | this.setIndexByName_[labels[0]] = 0; | |
2386 | } | |
857a6931 | 2387 | var dataIdx = 0; |
354e15ab | 2388 | for (var i = 1; i < datasets.length; i++) { |
82c6fe4d | 2389 | this.setIndexByName_[labels[i]] = i; |
4523c1f6 | 2390 | if (!this.visibility()[i - 1]) continue; |
82c6fe4d | 2391 | this.layout_.addDataset(labels[i], datasets[i]); |
857a6931 | 2392 | this.datasetIndex_[i] = dataIdx++; |
43af96e7 NK |
2393 | } |
2394 | ||
6faebb69 | 2395 | this.computeYAxisRanges_(extremes); |
b2c9222a DV |
2396 | this.layout_.setYAxes(this.axes_); |
2397 | ||
6a1aa64f DV |
2398 | this.addXTicks_(); |
2399 | ||
b2c9222a | 2400 | // Save the X axis zoomed status as the updateOptions call will tend to set it erroneously |
81856f70 | 2401 | var tmp_zoomed_x = this.zoomed_x_; |
6a1aa64f | 2402 | // Tell PlotKit to use this new data and render itself |
b2c9222a | 2403 | this.layout_.setDateWindow(this.dateWindow_); |
81856f70 | 2404 | this.zoomed_x_ = tmp_zoomed_x; |
6a1aa64f | 2405 | this.layout_.evaluateWithError(); |
9ca829f2 DV |
2406 | this.renderGraph_(is_initial_draw, false); |
2407 | ||
2408 | if (this.attr_("timingName")) { | |
2409 | var end = new Date(); | |
2410 | if (console) { | |
758a629f | 2411 | console.log(this.attr_("timingName") + " - drawGraph: " + (end - start) + "ms"); |
9ca829f2 DV |
2412 | } |
2413 | } | |
2414 | }; | |
2415 | ||
2416 | Dygraph.prototype.renderGraph_ = function(is_initial_draw, clearSelection) { | |
6a1aa64f DV |
2417 | this.plotter_.clear(); |
2418 | this.plotter_.render(); | |
f6401bf6 | 2419 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
2f5e7e1a | 2420 | this.canvas_.height); |
599fb4ad | 2421 | |
4a0cb9c4 DV |
2422 | // Generate a static legend before any particular point is selected. |
2423 | this.setLegendHTML_(); | |
2424 | ||
2425 | if (!is_initial_draw) { | |
fc4e84fa RK |
2426 | if (clearSelection) { |
2427 | if (typeof(this.selPoints_) !== 'undefined' && this.selPoints_.length) { | |
2428 | // We should select the point nearest the page x/y here, but it's easier | |
2429 | // to just clear the selection. This prevents erroneous hover dots from | |
2430 | // being displayed. | |
2431 | this.clearSelection(); | |
2432 | } else { | |
2433 | this.clearSelection(); | |
2434 | } | |
06303c32 | 2435 | } |
2fccd3dc DV |
2436 | } |
2437 | ||
ccd9d7c2 PF |
2438 | if (this.rangeSelector_) { |
2439 | this.rangeSelector_.renderInteractiveLayer(); | |
2440 | } | |
2441 | ||
599fb4ad | 2442 | if (this.attr_("drawCallback") !== null) { |
fe0b7c03 | 2443 | this.attr_("drawCallback")(this, is_initial_draw); |
599fb4ad | 2444 | } |
6a1aa64f DV |
2445 | }; |
2446 | ||
2447 | /** | |
629a09ae | 2448 | * @private |
26ca7938 DV |
2449 | * Determine properties of the y-axes which are independent of the data |
2450 | * currently being displayed. This includes things like the number of axes and | |
2451 | * the style of the axes. It does not include the range of each axis and its | |
2452 | * tick marks. | |
2453 | * This fills in this.axes_ and this.seriesToAxisMap_. | |
2454 | * axes_ = [ { options } ] | |
2455 | * seriesToAxisMap_ = { seriesName: 0, seriesName2: 1, ... } | |
2456 | * indices are into the axes_ array. | |
f09fc545 | 2457 | */ |
26ca7938 | 2458 | Dygraph.prototype.computeYAxes_ = function() { |
d64b8fea RK |
2459 | // Preserve valueWindow settings if they exist, and if the user hasn't |
2460 | // specified a new valueRange. | |
4dd0ac55 | 2461 | var i, valueWindows, seriesName, axis, index, opts, v; |
758a629f | 2462 | if (this.axes_ !== undefined && this.user_attrs_.hasOwnProperty("valueRange") === false) { |
d64b8fea | 2463 | valueWindows = []; |
758a629f | 2464 | for (index = 0; index < this.axes_.length; index++) { |
d64b8fea RK |
2465 | valueWindows.push(this.axes_[index].valueWindow); |
2466 | } | |
2467 | } | |
2468 | ||
00aa7f61 | 2469 | this.axes_ = [{ yAxisId : 0, g : this }]; // always have at least one y-axis. |
26ca7938 DV |
2470 | this.seriesToAxisMap_ = {}; |
2471 | ||
2472 | // Get a list of series names. | |
2473 | var labels = this.attr_("labels"); | |
1c77a3a1 | 2474 | var series = {}; |
758a629f | 2475 | for (i = 1; i < labels.length; i++) series[labels[i]] = (i - 1); |
f09fc545 DV |
2476 | |
2477 | // all options which could be applied per-axis: | |
2478 | var axisOptions = [ | |
2479 | 'includeZero', | |
2480 | 'valueRange', | |
2481 | 'labelsKMB', | |
2482 | 'labelsKMG2', | |
2483 | 'pixelsPerYLabel', | |
2484 | 'yAxisLabelWidth', | |
2485 | 'axisLabelFontSize', | |
7d0e7a0d RK |
2486 | 'axisTickSize', |
2487 | 'logscale' | |
f09fc545 DV |
2488 | ]; |
2489 | ||
2490 | // Copy global axis options over to the first axis. | |
758a629f | 2491 | for (i = 0; i < axisOptions.length; i++) { |
f09fc545 | 2492 | var k = axisOptions[i]; |
4dd0ac55 | 2493 | v = this.attr_(k); |
26ca7938 | 2494 | if (v) this.axes_[0][k] = v; |
f09fc545 DV |
2495 | } |
2496 | ||
2497 | // Go through once and add all the axes. | |
758a629f | 2498 | for (seriesName in series) { |
26ca7938 | 2499 | if (!series.hasOwnProperty(seriesName)) continue; |
758a629f DV |
2500 | axis = this.attr_("axis", seriesName); |
2501 | if (axis === null) { | |
26ca7938 | 2502 | this.seriesToAxisMap_[seriesName] = 0; |
f09fc545 DV |
2503 | continue; |
2504 | } | |
2505 | if (typeof(axis) == 'object') { | |
2506 | // Add a new axis, making a copy of its per-axis options. | |
4dd0ac55 | 2507 | opts = {}; |
26ca7938 | 2508 | Dygraph.update(opts, this.axes_[0]); |
f09fc545 | 2509 | Dygraph.update(opts, { valueRange: null }); // shouldn't inherit this. |
00aa7f61 RK |
2510 | var yAxisId = this.axes_.length; |
2511 | opts.yAxisId = yAxisId; | |
2512 | opts.g = this; | |
f09fc545 | 2513 | Dygraph.update(opts, axis); |
26ca7938 | 2514 | this.axes_.push(opts); |
00aa7f61 | 2515 | this.seriesToAxisMap_[seriesName] = yAxisId; |
f09fc545 DV |
2516 | } |
2517 | } | |
2518 | ||
2519 | // Go through one more time and assign series to an axis defined by another | |
2520 | // series, e.g. { 'Y1: { axis: {} }, 'Y2': { axis: 'Y1' } } | |
758a629f | 2521 | for (seriesName in series) { |
26ca7938 | 2522 | if (!series.hasOwnProperty(seriesName)) continue; |
758a629f | 2523 | axis = this.attr_("axis", seriesName); |
f09fc545 | 2524 | if (typeof(axis) == 'string') { |
26ca7938 | 2525 | if (!this.seriesToAxisMap_.hasOwnProperty(axis)) { |
f09fc545 DV |
2526 | this.error("Series " + seriesName + " wants to share a y-axis with " + |
2527 | "series " + axis + ", which does not define its own axis."); | |
2528 | return null; | |
2529 | } | |
26ca7938 DV |
2530 | var idx = this.seriesToAxisMap_[axis]; |
2531 | this.seriesToAxisMap_[seriesName] = idx; | |
f09fc545 DV |
2532 | } |
2533 | } | |
1c77a3a1 | 2534 | |
758a629f | 2535 | if (valueWindows !== undefined) { |
d64b8fea | 2536 | // Restore valueWindow settings. |
758a629f | 2537 | for (index = 0; index < valueWindows.length; index++) { |
d64b8fea RK |
2538 | this.axes_[index].valueWindow = valueWindows[index]; |
2539 | } | |
2540 | } | |
4dd0ac55 RV |
2541 | |
2542 | // New axes options | |
2543 | for (axis = 0; axis < this.axes_.length; axis++) { | |
2544 | if (axis === 0) { | |
2545 | opts = this.optionsViewForAxis_('y' + (axis ? '2' : '')); | |
2546 | v = opts("valueRange"); | |
2547 | if (v) this.axes_[axis].valueRange = v; | |
2548 | } else { // To keep old behavior | |
2549 | var axes = this.user_attrs_.axes; | |
2550 | if (axes && axes.y2) { | |
2551 | v = axes.y2.valueRange; | |
2552 | if (v) this.axes_[axis].valueRange = v; | |
2553 | } | |
2554 | } | |
2555 | } | |
2556 | ||
26ca7938 DV |
2557 | }; |
2558 | ||
2559 | /** | |
2560 | * Returns the number of y-axes on the chart. | |
2561 | * @return {Number} the number of axes. | |
2562 | */ | |
2563 | Dygraph.prototype.numAxes = function() { | |
2564 | var last_axis = 0; | |
2565 | for (var series in this.seriesToAxisMap_) { | |
2566 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; | |
2567 | var idx = this.seriesToAxisMap_[series]; | |
2568 | if (idx > last_axis) last_axis = idx; | |
2569 | } | |
2570 | return 1 + last_axis; | |
2571 | }; | |
2572 | ||
2573 | /** | |
629a09ae | 2574 | * @private |
b2c9222a DV |
2575 | * Returns axis properties for the given series. |
2576 | * @param { String } setName The name of the series for which to get axis | |
2577 | * properties, e.g. 'Y1'. | |
2578 | * @return { Object } The axis properties. | |
2579 | */ | |
2580 | Dygraph.prototype.axisPropertiesForSeries = function(series) { | |
2581 | // TODO(danvk): handle errors. | |
2582 | return this.axes_[this.seriesToAxisMap_[series]]; | |
2583 | }; | |
2584 | ||
2585 | /** | |
2586 | * @private | |
26ca7938 DV |
2587 | * Determine the value range and tick marks for each axis. |
2588 | * @param {Object} extremes A mapping from seriesName -> [low, high] | |
2589 | * This fills in the valueRange and ticks fields in each entry of this.axes_. | |
2590 | */ | |
2591 | Dygraph.prototype.computeYAxisRanges_ = function(extremes) { | |
2592 | // Build a map from axis number -> [list of series names] | |
758a629f DV |
2593 | var seriesForAxis = [], series; |
2594 | for (series in this.seriesToAxisMap_) { | |
26ca7938 DV |
2595 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; |
2596 | var idx = this.seriesToAxisMap_[series]; | |
2597 | while (seriesForAxis.length <= idx) seriesForAxis.push([]); | |
2598 | seriesForAxis[idx].push(series); | |
2599 | } | |
f09fc545 DV |
2600 | |
2601 | // Compute extreme values, a span and tick marks for each axis. | |
26ca7938 DV |
2602 | for (var i = 0; i < this.axes_.length; i++) { |
2603 | var axis = this.axes_[i]; | |
25f76ae3 | 2604 | |
06fc69b6 AV |
2605 | if (!seriesForAxis[i]) { |
2606 | // If no series are defined or visible then use a reasonable default | |
2607 | axis.extremeRange = [0, 1]; | |
2608 | } else { | |
1c77a3a1 | 2609 | // Calculate the extremes of extremes. |
758a629f | 2610 | series = seriesForAxis[i]; |
f09fc545 DV |
2611 | var minY = Infinity; // extremes[series[0]][0]; |
2612 | var maxY = -Infinity; // extremes[series[0]][1]; | |
ba049b89 | 2613 | var extremeMinY, extremeMaxY; |
a2da3777 | 2614 | |
f09fc545 | 2615 | for (var j = 0; j < series.length; j++) { |
a2da3777 DV |
2616 | // this skips invisible series |
2617 | if (!extremes.hasOwnProperty(series[j])) continue; | |
2618 | ||
ba049b89 NN |
2619 | // Only use valid extremes to stop null data series' from corrupting the scale. |
2620 | extremeMinY = extremes[series[j]][0]; | |
758a629f | 2621 | if (extremeMinY !== null) { |
36dfa958 | 2622 | minY = Math.min(extremeMinY, minY); |
ba049b89 NN |
2623 | } |
2624 | extremeMaxY = extremes[series[j]][1]; | |
758a629f | 2625 | if (extremeMaxY !== null) { |
36dfa958 | 2626 | maxY = Math.max(extremeMaxY, maxY); |
ba049b89 | 2627 | } |
f09fc545 DV |
2628 | } |
2629 | if (axis.includeZero && minY > 0) minY = 0; | |
2630 | ||
a2da3777 | 2631 | // Ensure we have a valid scale, otherwise default to [0, 1] for safety. |
36dfa958 | 2632 | if (minY == Infinity) minY = 0; |
a2da3777 | 2633 | if (maxY == -Infinity) maxY = 1; |
ba049b89 | 2634 | |
f09fc545 DV |
2635 | // Add some padding and round up to an integer to be human-friendly. |
2636 | var span = maxY - minY; | |
2637 | // special case: if we have no sense of scale, use +/-10% of the sole value. | |
758a629f | 2638 | if (span === 0) { span = maxY; } |
f09fc545 | 2639 | |
758a629f | 2640 | var maxAxisY, minAxisY; |
7d0e7a0d | 2641 | if (axis.logscale) { |
758a629f DV |
2642 | maxAxisY = maxY + 0.1 * span; |
2643 | minAxisY = minY; | |
ff022deb | 2644 | } else { |
758a629f DV |
2645 | maxAxisY = maxY + 0.1 * span; |
2646 | minAxisY = minY - 0.1 * span; | |
f09fc545 | 2647 | |
ff022deb RK |
2648 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. |
2649 | if (!this.attr_("avoidMinZero")) { | |
2650 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; | |
2651 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
2652 | } | |
f09fc545 | 2653 | |
ff022deb RK |
2654 | if (this.attr_("includeZero")) { |
2655 | if (maxY < 0) maxAxisY = 0; | |
2656 | if (minY > 0) minAxisY = 0; | |
2657 | } | |
f09fc545 | 2658 | } |
4cac8c7a RK |
2659 | axis.extremeRange = [minAxisY, maxAxisY]; |
2660 | } | |
2661 | if (axis.valueWindow) { | |
2662 | // This is only set if the user has zoomed on the y-axis. It is never set | |
2663 | // by a user. It takes precedence over axis.valueRange because, if you set | |
2664 | // valueRange, you'd still expect to be able to pan. | |
2665 | axis.computedValueRange = [axis.valueWindow[0], axis.valueWindow[1]]; | |
2666 | } else if (axis.valueRange) { | |
2667 | // This is a user-set value range for this axis. | |
2668 | axis.computedValueRange = [axis.valueRange[0], axis.valueRange[1]]; | |
2669 | } else { | |
2670 | axis.computedValueRange = axis.extremeRange; | |
f09fc545 DV |
2671 | } |
2672 | ||
0d64e596 DV |
2673 | // Add ticks. By default, all axes inherit the tick positions of the |
2674 | // primary axis. However, if an axis is specifically marked as having | |
2675 | // independent ticks, then that is permissible as well. | |
48e614ac DV |
2676 | var opts = this.optionsViewForAxis_('y' + (i ? '2' : '')); |
2677 | var ticker = opts('ticker'); | |
758a629f | 2678 | if (i === 0 || axis.independentTicks) { |
48e614ac DV |
2679 | axis.ticks = ticker(axis.computedValueRange[0], |
2680 | axis.computedValueRange[1], | |
2681 | this.height_, // TODO(danvk): should be area.height | |
2682 | opts, | |
2683 | this); | |
0d64e596 DV |
2684 | } else { |
2685 | var p_axis = this.axes_[0]; | |
2686 | var p_ticks = p_axis.ticks; | |
2687 | var p_scale = p_axis.computedValueRange[1] - p_axis.computedValueRange[0]; | |
2688 | var scale = axis.computedValueRange[1] - axis.computedValueRange[0]; | |
2689 | var tick_values = []; | |
25f76ae3 DV |
2690 | for (var k = 0; k < p_ticks.length; k++) { |
2691 | var y_frac = (p_ticks[k].v - p_axis.computedValueRange[0]) / p_scale; | |
0d64e596 DV |
2692 | var y_val = axis.computedValueRange[0] + y_frac * scale; |
2693 | tick_values.push(y_val); | |
2694 | } | |
2695 | ||
48e614ac DV |
2696 | axis.ticks = ticker(axis.computedValueRange[0], |
2697 | axis.computedValueRange[1], | |
2698 | this.height_, // TODO(danvk): should be area.height | |
2699 | opts, | |
2700 | this, | |
2701 | tick_values); | |
0d64e596 | 2702 | } |
f09fc545 | 2703 | } |
f09fc545 | 2704 | }; |
25f76ae3 | 2705 | |
f09fc545 | 2706 | /** |
b1a3b195 DV |
2707 | * Extracts one series from the raw data (a 2D array) into an array of (date, |
2708 | * value) tuples. | |
2709 | * | |
2710 | * This is where undesirable points (i.e. negative values on log scales and | |
2711 | * missing values through which we wish to connect lines) are dropped. | |
2712 | * | |
2713 | * @private | |
2714 | */ | |
04c104d7 | 2715 | Dygraph.prototype.extractSeries_ = function(rawData, i, logScale) { |
b1a3b195 DV |
2716 | var series = []; |
2717 | for (var j = 0; j < rawData.length; j++) { | |
2718 | var x = rawData[j][0]; | |
2719 | var point = rawData[j][i]; | |
2720 | if (logScale) { | |
2721 | // On the log scale, points less than zero do not exist. | |
04c104d7 | 2722 | // This will create a gap in the chart. |
b1a3b195 DV |
2723 | if (point <= 0) { |
2724 | point = null; | |
2725 | } | |
b1a3b195 | 2726 | } |
04c104d7 | 2727 | series.push([x, point]); |
b1a3b195 DV |
2728 | } |
2729 | return series; | |
2730 | }; | |
2731 | ||
2732 | /** | |
629a09ae | 2733 | * @private |
6a1aa64f DV |
2734 | * Calculates the rolling average of a data set. |
2735 | * If originalData is [label, val], rolls the average of those. | |
2736 | * If originalData is [label, [, it's interpreted as [value, stddev] | |
2737 | * and the roll is returned in the same form, with appropriately reduced | |
2738 | * stddev for each value. | |
2739 | * Note that this is where fractional input (i.e. '5/10') is converted into | |
2740 | * decimal values. | |
2741 | * @param {Array} originalData The data in the appropriate format (see above) | |
6faebb69 JB |
2742 | * @param {Number} rollPeriod The number of points over which to average the |
2743 | * data | |
6a1aa64f | 2744 | */ |
285a6bda | 2745 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
6a1aa64f DV |
2746 | if (originalData.length < 2) |
2747 | return originalData; | |
758a629f | 2748 | rollPeriod = Math.min(rollPeriod, originalData.length); |
6a1aa64f | 2749 | var rollingData = []; |
285a6bda | 2750 | var sigma = this.attr_("sigma"); |
6a1aa64f | 2751 | |
758a629f | 2752 | var low, high, i, j, y, sum, num_ok, stddev; |
6a1aa64f DV |
2753 | if (this.fractions_) { |
2754 | var num = 0; | |
2755 | var den = 0; // numerator/denominator | |
2756 | var mult = 100.0; | |
758a629f | 2757 | for (i = 0; i < originalData.length; i++) { |
6a1aa64f DV |
2758 | num += originalData[i][1][0]; |
2759 | den += originalData[i][1][1]; | |
2760 | if (i - rollPeriod >= 0) { | |
2761 | num -= originalData[i - rollPeriod][1][0]; | |
2762 | den -= originalData[i - rollPeriod][1][1]; | |
2763 | } | |
2764 | ||
2765 | var date = originalData[i][0]; | |
2766 | var value = den ? num / den : 0.0; | |
285a6bda | 2767 | if (this.attr_("errorBars")) { |
395e98a3 | 2768 | if (this.attr_("wilsonInterval")) { |
6a1aa64f DV |
2769 | // For more details on this confidence interval, see: |
2770 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval | |
2771 | if (den) { | |
2772 | var p = value < 0 ? 0 : value, n = den; | |
2773 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); | |
2774 | var denom = 1 + sigma * sigma / den; | |
758a629f DV |
2775 | low = (p + sigma * sigma / (2 * den) - pm) / denom; |
2776 | high = (p + sigma * sigma / (2 * den) + pm) / denom; | |
6a1aa64f DV |
2777 | rollingData[i] = [date, |
2778 | [p * mult, (p - low) * mult, (high - p) * mult]]; | |
2779 | } else { | |
2780 | rollingData[i] = [date, [0, 0, 0]]; | |
2781 | } | |
2782 | } else { | |
758a629f | 2783 | stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; |
6a1aa64f DV |
2784 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; |
2785 | } | |
2786 | } else { | |
2787 | rollingData[i] = [date, mult * value]; | |
2788 | } | |
2789 | } | |
9922b78b | 2790 | } else if (this.attr_("customBars")) { |
758a629f | 2791 | low = 0; |
f6885d6a | 2792 | var mid = 0; |
758a629f | 2793 | high = 0; |
f6885d6a | 2794 | var count = 0; |
758a629f | 2795 | for (i = 0; i < originalData.length; i++) { |
6a1aa64f | 2796 | var data = originalData[i][1]; |
758a629f | 2797 | y = data[1]; |
6a1aa64f | 2798 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; |
f6885d6a | 2799 | |
758a629f | 2800 | if (y !== null && !isNaN(y)) { |
49a7d0d5 DV |
2801 | low += data[0]; |
2802 | mid += y; | |
2803 | high += data[2]; | |
2804 | count += 1; | |
2805 | } | |
f6885d6a DV |
2806 | if (i - rollPeriod >= 0) { |
2807 | var prev = originalData[i - rollPeriod]; | |
758a629f | 2808 | if (prev[1][1] !== null && !isNaN(prev[1][1])) { |
49a7d0d5 DV |
2809 | low -= prev[1][0]; |
2810 | mid -= prev[1][1]; | |
2811 | high -= prev[1][2]; | |
2812 | count -= 1; | |
2813 | } | |
f6885d6a | 2814 | } |
502d5996 DV |
2815 | if (count) { |
2816 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, | |
2817 | 1.0 * (mid - low) / count, | |
2818 | 1.0 * (high - mid) / count ]]; | |
2819 | } else { | |
2820 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
2821 | } | |
2769de62 | 2822 | } |
6a1aa64f DV |
2823 | } else { |
2824 | // Calculate the rolling average for the first rollPeriod - 1 points where | |
6faebb69 | 2825 | // there is not enough data to roll over the full number of points |
285a6bda | 2826 | if (!this.attr_("errorBars")){ |
5011e7a1 DV |
2827 | if (rollPeriod == 1) { |
2828 | return originalData; | |
2829 | } | |
2830 | ||
758a629f DV |
2831 | for (i = 0; i < originalData.length; i++) { |
2832 | sum = 0; | |
2833 | num_ok = 0; | |
2834 | for (j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { | |
2835 | y = originalData[j][1]; | |
2836 | if (y === null || isNaN(y)) continue; | |
5011e7a1 | 2837 | num_ok++; |
2847c1cf | 2838 | sum += originalData[j][1]; |
6a1aa64f | 2839 | } |
5011e7a1 | 2840 | if (num_ok) { |
2847c1cf | 2841 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
5011e7a1 | 2842 | } else { |
2847c1cf | 2843 | rollingData[i] = [originalData[i][0], null]; |
5011e7a1 | 2844 | } |
6a1aa64f | 2845 | } |
2847c1cf DV |
2846 | |
2847 | } else { | |
758a629f DV |
2848 | for (i = 0; i < originalData.length; i++) { |
2849 | sum = 0; | |
6a1aa64f | 2850 | var variance = 0; |
758a629f DV |
2851 | num_ok = 0; |
2852 | for (j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { | |
2853 | y = originalData[j][1][0]; | |
2854 | if (y === null || isNaN(y)) continue; | |
5011e7a1 | 2855 | num_ok++; |
6a1aa64f DV |
2856 | sum += originalData[j][1][0]; |
2857 | variance += Math.pow(originalData[j][1][1], 2); | |
2858 | } | |
5011e7a1 | 2859 | if (num_ok) { |
758a629f | 2860 | stddev = Math.sqrt(variance) / num_ok; |
5011e7a1 DV |
2861 | rollingData[i] = [originalData[i][0], |
2862 | [sum / num_ok, sigma * stddev, sigma * stddev]]; | |
2863 | } else { | |
2864 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
2865 | } | |
6a1aa64f DV |
2866 | } |
2867 | } | |
2868 | } | |
2869 | ||
2870 | return rollingData; | |
2871 | }; | |
2872 | ||
2873 | /** | |
285a6bda DV |
2874 | * Detects the type of the str (date or numeric) and sets the various |
2875 | * formatting attributes in this.attrs_ based on this type. | |
2876 | * @param {String} str An x value. | |
2877 | * @private | |
2878 | */ | |
2879 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
2880 | var isDate = false; | |
0842b24b DV |
2881 | var dashPos = str.indexOf('-'); // could be 2006-01-01 _or_ 1.0e-2 |
2882 | if ((dashPos > 0 && (str[dashPos-1] != 'e' && str[dashPos-1] != 'E')) || | |
285a6bda DV |
2883 | str.indexOf('/') >= 0 || |
2884 | isNaN(parseFloat(str))) { | |
2885 | isDate = true; | |
2886 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
2887 | // TODO(danvk): remove support for this format. | |
2888 | isDate = true; | |
2889 | } | |
2890 | ||
2891 | if (isDate) { | |
285a6bda | 2892 | this.attrs_.xValueParser = Dygraph.dateParser; |
48e614ac DV |
2893 | this.attrs_.axes.x.valueFormatter = Dygraph.dateString_; |
2894 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; | |
2895 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisFormatter; | |
285a6bda | 2896 | } else { |
c39e1d93 | 2897 | /** @private (shut up, jsdoc!) */ |
285a6bda | 2898 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
48e614ac DV |
2899 | // TODO(danvk): use Dygraph.numberValueFormatter here? |
2900 | /** @private (shut up, jsdoc!) */ | |
2901 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; | |
44462ba3 | 2902 | this.attrs_.axes.x.ticker = Dygraph.numericLinearTicks; |
48e614ac | 2903 | this.attrs_.axes.x.axisLabelFormatter = this.attrs_.axes.x.valueFormatter; |
6a1aa64f | 2904 | } |
6a1aa64f DV |
2905 | }; |
2906 | ||
2907 | /** | |
5cd7ac68 DV |
2908 | * Parses the value as a floating point number. This is like the parseFloat() |
2909 | * built-in, but with a few differences: | |
2910 | * - the empty string is parsed as null, rather than NaN. | |
2911 | * - if the string cannot be parsed at all, an error is logged. | |
2912 | * If the string can't be parsed, this method returns null. | |
2913 | * @param {String} x The string to be parsed | |
2914 | * @param {Number} opt_line_no The line number from which the string comes. | |
2915 | * @param {String} opt_line The text of the line from which the string comes. | |
2916 | * @private | |
2917 | */ | |
2918 | ||
2919 | // Parse the x as a float or return null if it's not a number. | |
2920 | Dygraph.prototype.parseFloat_ = function(x, opt_line_no, opt_line) { | |
2921 | var val = parseFloat(x); | |
2922 | if (!isNaN(val)) return val; | |
2923 | ||
2924 | // Try to figure out what happeend. | |
2925 | // If the value is the empty string, parse it as null. | |
2926 | if (/^ *$/.test(x)) return null; | |
2927 | ||
2928 | // If it was actually "NaN", return it as NaN. | |
2929 | if (/^ *nan *$/i.test(x)) return NaN; | |
2930 | ||
2931 | // Looks like a parsing error. | |
2932 | var msg = "Unable to parse '" + x + "' as a number"; | |
2933 | if (opt_line !== null && opt_line_no !== null) { | |
2934 | msg += " on line " + (1+opt_line_no) + " ('" + opt_line + "') of CSV."; | |
2935 | } | |
2936 | this.error(msg); | |
2937 | ||
2938 | return null; | |
2939 | }; | |
2940 | ||
2941 | /** | |
629a09ae | 2942 | * @private |
6a1aa64f DV |
2943 | * Parses a string in a special csv format. We expect a csv file where each |
2944 | * line is a date point, and the first field in each line is the date string. | |
2945 | * We also expect that all remaining fields represent series. | |
285a6bda | 2946 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f | 2947 | * date, series1, stddev1, series2, stddev2, ... |
629a09ae | 2948 | * @param {[Object]} data See above. |
285a6bda | 2949 | * |
629a09ae | 2950 | * @return [Object] An array with one entry for each row. These entries |
285a6bda DV |
2951 | * are an array of cells in that row. The first entry is the parsed x-value for |
2952 | * the row. The second, third, etc. are the y-values. These can take on one of | |
2953 | * three forms, depending on the CSV and constructor parameters: | |
2954 | * 1. numeric value | |
2955 | * 2. [ value, stddev ] | |
2956 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 2957 | */ |
285a6bda | 2958 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f DV |
2959 | var ret = []; |
2960 | var lines = data.split("\n"); | |
758a629f | 2961 | var vals, j; |
3d67f03b DV |
2962 | |
2963 | // Use the default delimiter or fall back to a tab if that makes sense. | |
2964 | var delim = this.attr_('delimiter'); | |
2965 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { | |
2966 | delim = '\t'; | |
2967 | } | |
2968 | ||
285a6bda | 2969 | var start = 0; |
d7beab6b DV |
2970 | if (!('labels' in this.user_attrs_)) { |
2971 | // User hasn't explicitly set labels, so they're (presumably) in the CSV. | |
285a6bda | 2972 | start = 1; |
d7beab6b | 2973 | this.attrs_.labels = lines[0].split(delim); // NOTE: _not_ user_attrs_. |
6a1aa64f | 2974 | } |
5cd7ac68 | 2975 | var line_no = 0; |
03b522a4 | 2976 | |
285a6bda DV |
2977 | var xParser; |
2978 | var defaultParserSet = false; // attempt to auto-detect x value type | |
2979 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 2980 | var outOfOrder = false; |
6a1aa64f DV |
2981 | for (var i = start; i < lines.length; i++) { |
2982 | var line = lines[i]; | |
5cd7ac68 | 2983 | line_no = i; |
758a629f | 2984 | if (line.length === 0) continue; // skip blank lines |
3d67f03b DV |
2985 | if (line[0] == '#') continue; // skip comment lines |
2986 | var inFields = line.split(delim); | |
285a6bda | 2987 | if (inFields.length < 2) continue; |
6a1aa64f DV |
2988 | |
2989 | var fields = []; | |
285a6bda DV |
2990 | if (!defaultParserSet) { |
2991 | this.detectTypeFromString_(inFields[0]); | |
2992 | xParser = this.attr_("xValueParser"); | |
2993 | defaultParserSet = true; | |
2994 | } | |
2995 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
2996 | |
2997 | // If fractions are expected, parse the numbers as "A/B" | |
2998 | if (this.fractions_) { | |
758a629f | 2999 | for (j = 1; j < inFields.length; j++) { |
6a1aa64f | 3000 | // TODO(danvk): figure out an appropriate way to flag parse errors. |
758a629f | 3001 | vals = inFields[j].split("/"); |
7219edb3 DV |
3002 | if (vals.length != 2) { |
3003 | this.error('Expected fractional "num/den" values in CSV data ' + | |
3004 | "but found a value '" + inFields[j] + "' on line " + | |
3005 | (1 + i) + " ('" + line + "') which is not of this form."); | |
3006 | fields[j] = [0, 0]; | |
3007 | } else { | |
3008 | fields[j] = [this.parseFloat_(vals[0], i, line), | |
3009 | this.parseFloat_(vals[1], i, line)]; | |
3010 | } | |
6a1aa64f | 3011 | } |
285a6bda | 3012 | } else if (this.attr_("errorBars")) { |
6a1aa64f | 3013 | // If there are error bars, values are (value, stddev) pairs |
7219edb3 DV |
3014 | if (inFields.length % 2 != 1) { |
3015 | this.error('Expected alternating (value, stdev.) pairs in CSV data ' + | |
3016 | 'but line ' + (1 + i) + ' has an odd number of values (' + | |
3017 | (inFields.length - 1) + "): '" + line + "'"); | |
3018 | } | |
758a629f | 3019 | for (j = 1; j < inFields.length; j += 2) { |
5cd7ac68 DV |
3020 | fields[(j + 1) / 2] = [this.parseFloat_(inFields[j], i, line), |
3021 | this.parseFloat_(inFields[j + 1], i, line)]; | |
7219edb3 | 3022 | } |
9922b78b | 3023 | } else if (this.attr_("customBars")) { |
6a1aa64f | 3024 | // Bars are a low;center;high tuple |
758a629f | 3025 | for (j = 1; j < inFields.length; j++) { |
327a9279 DV |
3026 | var val = inFields[j]; |
3027 | if (/^ *$/.test(val)) { | |
3028 | fields[j] = [null, null, null]; | |
3029 | } else { | |
758a629f | 3030 | vals = val.split(";"); |
327a9279 DV |
3031 | if (vals.length == 3) { |
3032 | fields[j] = [ this.parseFloat_(vals[0], i, line), | |
3033 | this.parseFloat_(vals[1], i, line), | |
3034 | this.parseFloat_(vals[2], i, line) ]; | |
3035 | } else { | |
1a5dc2af RK |
3036 | this.warn('When using customBars, values must be either blank ' + |
3037 | 'or "low;center;high" tuples (got "' + val + | |
3038 | '" on line ' + (1+i)); | |
327a9279 DV |
3039 | } |
3040 | } | |
6a1aa64f DV |
3041 | } |
3042 | } else { | |
3043 | // Values are just numbers | |
758a629f | 3044 | for (j = 1; j < inFields.length; j++) { |
5cd7ac68 | 3045 | fields[j] = this.parseFloat_(inFields[j], i, line); |
285a6bda | 3046 | } |
6a1aa64f | 3047 | } |
987840a2 DV |
3048 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
3049 | outOfOrder = true; | |
3050 | } | |
285a6bda DV |
3051 | |
3052 | if (fields.length != expectedCols) { | |
3053 | this.error("Number of columns in line " + i + " (" + fields.length + | |
3054 | ") does not agree with number of labels (" + expectedCols + | |
3055 | ") " + line); | |
3056 | } | |
6d0aaa09 DV |
3057 | |
3058 | // If the user specified the 'labels' option and none of the cells of the | |
3059 | // first row parsed correctly, then they probably double-specified the | |
3060 | // labels. We go with the values set in the option, discard this row and | |
3061 | // log a warning to the JS console. | |
758a629f | 3062 | if (i === 0 && this.attr_('labels')) { |
6d0aaa09 | 3063 | var all_null = true; |
758a629f | 3064 | for (j = 0; all_null && j < fields.length; j++) { |
6d0aaa09 DV |
3065 | if (fields[j]) all_null = false; |
3066 | } | |
3067 | if (all_null) { | |
3068 | this.warn("The dygraphs 'labels' option is set, but the first row of " + | |
3069 | "CSV data ('" + line + "') appears to also contain labels. " + | |
3070 | "Will drop the CSV labels and use the option labels."); | |
3071 | continue; | |
3072 | } | |
3073 | } | |
3074 | ret.push(fields); | |
6a1aa64f | 3075 | } |
987840a2 DV |
3076 | |
3077 | if (outOfOrder) { | |
3078 | this.warn("CSV is out of order; order it correctly to speed loading."); | |
758a629f | 3079 | ret.sort(function(a,b) { return a[0] - b[0]; }); |
987840a2 DV |
3080 | } |
3081 | ||
6a1aa64f DV |
3082 | return ret; |
3083 | }; | |
3084 | ||
3085 | /** | |
629a09ae | 3086 | * @private |
285a6bda DV |
3087 | * The user has provided their data as a pre-packaged JS array. If the x values |
3088 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
3089 | * are dates, we need to convert them from Date objects to ms since epoch. | |
629a09ae DV |
3090 | * @param {[Object]} data |
3091 | * @return {[Object]} data with numeric x values. | |
285a6bda DV |
3092 | */ |
3093 | Dygraph.prototype.parseArray_ = function(data) { | |
3094 | // Peek at the first x value to see if it's numeric. | |
758a629f | 3095 | if (data.length === 0) { |
285a6bda DV |
3096 | this.error("Can't plot empty data set"); |
3097 | return null; | |
3098 | } | |
758a629f | 3099 | if (data[0].length === 0) { |
285a6bda DV |
3100 | this.error("Data set cannot contain an empty row"); |
3101 | return null; | |
3102 | } | |
3103 | ||
758a629f DV |
3104 | var i; |
3105 | if (this.attr_("labels") === null) { | |
285a6bda DV |
3106 | this.warn("Using default labels. Set labels explicitly via 'labels' " + |
3107 | "in the options parameter"); | |
3108 | this.attrs_.labels = [ "X" ]; | |
758a629f | 3109 | for (i = 1; i < data[0].length; i++) { |
285a6bda DV |
3110 | this.attrs_.labels.push("Y" + i); |
3111 | } | |
3112 | } | |
3113 | ||
2dda3850 | 3114 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda | 3115 | // Some intelligent defaults for a date x-axis. |
48e614ac DV |
3116 | this.attrs_.axes.x.valueFormatter = Dygraph.dateString_; |
3117 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisFormatter; | |
3118 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; | |
285a6bda DV |
3119 | |
3120 | // Assume they're all dates. | |
e3ab7b40 | 3121 | var parsedData = Dygraph.clone(data); |
758a629f DV |
3122 | for (i = 0; i < data.length; i++) { |
3123 | if (parsedData[i].length === 0) { | |
a323ff4a | 3124 | this.error("Row " + (1 + i) + " of data is empty"); |
285a6bda DV |
3125 | return null; |
3126 | } | |
758a629f DV |
3127 | if (parsedData[i][0] === null || |
3128 | typeof(parsedData[i][0].getTime) != 'function' || | |
3129 | isNaN(parsedData[i][0].getTime())) { | |
be96a1f5 | 3130 | this.error("x value in row " + (1 + i) + " is not a Date"); |
285a6bda DV |
3131 | return null; |
3132 | } | |
3133 | parsedData[i][0] = parsedData[i][0].getTime(); | |
3134 | } | |
3135 | return parsedData; | |
3136 | } else { | |
3137 | // Some intelligent defaults for a numeric x-axis. | |
c39e1d93 | 3138 | /** @private (shut up, jsdoc!) */ |
48e614ac DV |
3139 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; |
3140 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.numberAxisLabelFormatter; | |
44462ba3 | 3141 | this.attrs_.axes.x.ticker = Dygraph.numericLinearTicks; |
285a6bda DV |
3142 | return data; |
3143 | } | |
3144 | }; | |
3145 | ||
3146 | /** | |
79420a1e DV |
3147 | * Parses a DataTable object from gviz. |
3148 | * The data is expected to have a first column that is either a date or a | |
3149 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
3150 | * between this.xValueParser_ and the type of the first column, it will be | |
a685723c | 3151 | * fixed. Fills out rawData_. |
629a09ae | 3152 | * @param {[Object]} data See above. |
79420a1e DV |
3153 | * @private |
3154 | */ | |
285a6bda | 3155 | Dygraph.prototype.parseDataTable_ = function(data) { |
5829af3d | 3156 | var shortTextForAnnotationNum = function(num) { |
3157 | // converts [0-9]+ [A-Z][a-z]* | |
3158 | // example: 0=A, 1=B, 25=Z, 26=Aa, 27=Ab | |
3159 | // and continues like.. Ba Bb .. Za .. Zz..Aaa...Zzz Aaaa Zzzz | |
3160 | var shortText = String.fromCharCode(65 /* A */ + num % 26); | |
3161 | num = Math.floor(num / 26); | |
3162 | while ( num > 0 ) { | |
3163 | shortText = String.fromCharCode(65 /* A */ + (num - 1) % 26 ) + shortText.toLowerCase(); | |
3164 | num = Math.floor((num - 1) / 26); | |
3165 | } | |
3166 | return shortText; | |
3167 | } | |
3168 | ||
79420a1e DV |
3169 | var cols = data.getNumberOfColumns(); |
3170 | var rows = data.getNumberOfRows(); | |
3171 | ||
d955e223 | 3172 | var indepType = data.getColumnType(0); |
4440f6c8 | 3173 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda | 3174 | this.attrs_.xValueParser = Dygraph.dateParser; |
48e614ac DV |
3175 | this.attrs_.axes.x.valueFormatter = Dygraph.dateString_; |
3176 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; | |
3177 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisFormatter; | |
33127159 | 3178 | } else if (indepType == 'number') { |
285a6bda | 3179 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
48e614ac | 3180 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; |
44462ba3 | 3181 | this.attrs_.axes.x.ticker = Dygraph.numericLinearTicks; |
48e614ac | 3182 | this.attrs_.axes.x.axisLabelFormatter = this.attrs_.axes.x.valueFormatter; |
285a6bda | 3183 | } else { |
987840a2 DV |
3184 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
3185 | "column 1 of DataTable input (Got '" + indepType + "')"); | |
79420a1e DV |
3186 | return null; |
3187 | } | |
3188 | ||
a685723c DV |
3189 | // Array of the column indices which contain data (and not annotations). |
3190 | var colIdx = []; | |
3191 | var annotationCols = {}; // data index -> [annotation cols] | |
3192 | var hasAnnotations = false; | |
758a629f DV |
3193 | var i, j; |
3194 | for (i = 1; i < cols; i++) { | |
a685723c DV |
3195 | var type = data.getColumnType(i); |
3196 | if (type == 'number') { | |
3197 | colIdx.push(i); | |
3198 | } else if (type == 'string' && this.attr_('displayAnnotations')) { | |
3199 | // This is OK -- it's an annotation column. | |
3200 | var dataIdx = colIdx[colIdx.length - 1]; | |
3201 | if (!annotationCols.hasOwnProperty(dataIdx)) { | |
3202 | annotationCols[dataIdx] = [i]; | |
3203 | } else { | |
3204 | annotationCols[dataIdx].push(i); | |
3205 | } | |
3206 | hasAnnotations = true; | |
3207 | } else { | |
3208 | this.error("Only 'number' is supported as a dependent type with Gviz." + | |
3209 | " 'string' is only supported if displayAnnotations is true"); | |
3210 | } | |
3211 | } | |
3212 | ||
3213 | // Read column labels | |
3214 | // TODO(danvk): add support back for errorBars | |
3215 | var labels = [data.getColumnLabel(0)]; | |
758a629f | 3216 | for (i = 0; i < colIdx.length; i++) { |
a685723c | 3217 | labels.push(data.getColumnLabel(colIdx[i])); |
f9348814 | 3218 | if (this.attr_("errorBars")) i += 1; |
a685723c DV |
3219 | } |
3220 | this.attrs_.labels = labels; | |
3221 | cols = labels.length; | |
3222 | ||
79420a1e | 3223 | var ret = []; |
987840a2 | 3224 | var outOfOrder = false; |
a685723c | 3225 | var annotations = []; |
758a629f | 3226 | for (i = 0; i < rows; i++) { |
79420a1e | 3227 | var row = []; |
debe4434 DV |
3228 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
3229 | data.getValue(i, 0) === null) { | |
129569a5 FD |
3230 | this.warn("Ignoring row " + i + |
3231 | " of DataTable because of undefined or null first column."); | |
debe4434 DV |
3232 | continue; |
3233 | } | |
3234 | ||
c21d2c2d | 3235 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
3236 | row.push(data.getValue(i, 0).getTime()); |
3237 | } else { | |
3238 | row.push(data.getValue(i, 0)); | |
3239 | } | |
3e3f84e4 | 3240 | if (!this.attr_("errorBars")) { |
758a629f | 3241 | for (j = 0; j < colIdx.length; j++) { |
a685723c DV |
3242 | var col = colIdx[j]; |
3243 | row.push(data.getValue(i, col)); | |
3244 | if (hasAnnotations && | |
3245 | annotationCols.hasOwnProperty(col) && | |
758a629f | 3246 | data.getValue(i, annotationCols[col][0]) !== null) { |
a685723c DV |
3247 | var ann = {}; |
3248 | ann.series = data.getColumnLabel(col); | |
3249 | ann.xval = row[0]; | |
5829af3d | 3250 | ann.shortText = shortTextForAnnotationNum(annotations.length); |
a685723c DV |
3251 | ann.text = ''; |
3252 | for (var k = 0; k < annotationCols[col].length; k++) { | |
3253 | if (k) ann.text += "\n"; | |
3254 | ann.text += data.getValue(i, annotationCols[col][k]); | |
3255 | } | |
3256 | annotations.push(ann); | |
3257 | } | |
3e3f84e4 | 3258 | } |
92fd68d8 DV |
3259 | |
3260 | // Strip out infinities, which give dygraphs problems later on. | |
758a629f | 3261 | for (j = 0; j < row.length; j++) { |
92fd68d8 DV |
3262 | if (!isFinite(row[j])) row[j] = null; |
3263 | } | |
3e3f84e4 | 3264 | } else { |
758a629f | 3265 | for (j = 0; j < cols - 1; j++) { |
3e3f84e4 DV |
3266 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); |
3267 | } | |
79420a1e | 3268 | } |
987840a2 DV |
3269 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
3270 | outOfOrder = true; | |
3271 | } | |
243d96e8 | 3272 | ret.push(row); |
79420a1e | 3273 | } |
987840a2 DV |
3274 | |
3275 | if (outOfOrder) { | |
3276 | this.warn("DataTable is out of order; order it correctly to speed loading."); | |
758a629f | 3277 | ret.sort(function(a,b) { return a[0] - b[0]; }); |
987840a2 | 3278 | } |
a685723c DV |
3279 | this.rawData_ = ret; |
3280 | ||
3281 | if (annotations.length > 0) { | |
3282 | this.setAnnotations(annotations, true); | |
3283 | } | |
758a629f | 3284 | }; |
79420a1e | 3285 | |
629a09ae | 3286 | /** |
6a1aa64f DV |
3287 | * Get the CSV data. If it's in a function, call that function. If it's in a |
3288 | * file, do an XMLHttpRequest to get it. | |
3289 | * @private | |
3290 | */ | |
285a6bda | 3291 | Dygraph.prototype.start_ = function() { |
36d4fabf RK |
3292 | var data = this.file_; |
3293 | ||
3294 | // Functions can return references of all other types. | |
3295 | if (typeof data == 'function') { | |
3296 | data = data(); | |
3297 | } | |
3298 | ||
3299 | if (Dygraph.isArrayLike(data)) { | |
3300 | this.rawData_ = this.parseArray_(data); | |
26ca7938 | 3301 | this.predraw_(); |
36d4fabf RK |
3302 | } else if (typeof data == 'object' && |
3303 | typeof data.getColumnRange == 'function') { | |
79420a1e | 3304 | // must be a DataTable from gviz. |
36d4fabf | 3305 | this.parseDataTable_(data); |
26ca7938 | 3306 | this.predraw_(); |
36d4fabf | 3307 | } else if (typeof data == 'string') { |
285a6bda | 3308 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. |
36d4fabf RK |
3309 | if (data.indexOf('\n') >= 0) { |
3310 | this.loadedEvent_(data); | |
285a6bda DV |
3311 | } else { |
3312 | var req = new XMLHttpRequest(); | |
3313 | var caller = this; | |
3314 | req.onreadystatechange = function () { | |
3315 | if (req.readyState == 4) { | |
758a629f DV |
3316 | if (req.status === 200 || // Normal http |
3317 | req.status === 0) { // Chrome w/ --allow-file-access-from-files | |
285a6bda DV |
3318 | caller.loadedEvent_(req.responseText); |
3319 | } | |
6a1aa64f | 3320 | } |
285a6bda | 3321 | }; |
6a1aa64f | 3322 | |
36d4fabf | 3323 | req.open("GET", data, true); |
285a6bda DV |
3324 | req.send(null); |
3325 | } | |
3326 | } else { | |
36d4fabf | 3327 | this.error("Unknown data format: " + (typeof data)); |
6a1aa64f DV |
3328 | } |
3329 | }; | |
3330 | ||
3331 | /** | |
3332 | * Changes various properties of the graph. These can include: | |
3333 | * <ul> | |
3334 | * <li>file: changes the source data for the graph</li> | |
3335 | * <li>errorBars: changes whether the data contains stddev</li> | |
3336 | * </ul> | |
dcb25130 | 3337 | * |
ccfcc169 DV |
3338 | * There's a huge variety of options that can be passed to this method. For a |
3339 | * full list, see http://dygraphs.com/options.html. | |
3340 | * | |
6a1aa64f | 3341 | * @param {Object} attrs The new properties and values |
ccfcc169 DV |
3342 | * @param {Boolean} [block_redraw] Usually the chart is redrawn after every |
3343 | * call to updateOptions(). If you know better, you can pass true to explicitly | |
3344 | * block the redraw. This can be useful for chaining updateOptions() calls, | |
3345 | * avoiding the occasional infinite loop and preventing redraws when it's not | |
3346 | * necessary (e.g. when updating a callback). | |
6a1aa64f | 3347 | */ |
48e614ac | 3348 | Dygraph.prototype.updateOptions = function(input_attrs, block_redraw) { |
ccfcc169 DV |
3349 | if (typeof(block_redraw) == 'undefined') block_redraw = false; |
3350 | ||
48e614ac | 3351 | // mapLegacyOptions_ drops the "file" parameter as a convenience to us. |
758a629f | 3352 | var file = input_attrs.file; |
48e614ac DV |
3353 | var attrs = Dygraph.mapLegacyOptions_(input_attrs); |
3354 | ||
ccfcc169 | 3355 | // TODO(danvk): this is a mess. Move these options into attr_. |
c65f2303 | 3356 | if ('rollPeriod' in attrs) { |
6a1aa64f DV |
3357 | this.rollPeriod_ = attrs.rollPeriod; |
3358 | } | |
c65f2303 | 3359 | if ('dateWindow' in attrs) { |
6a1aa64f | 3360 | this.dateWindow_ = attrs.dateWindow; |
e5152598 | 3361 | if (!('isZoomedIgnoreProgrammaticZoom' in attrs)) { |
758a629f | 3362 | this.zoomed_x_ = (attrs.dateWindow !== null); |
81856f70 | 3363 | } |
b7e5862d | 3364 | } |
e5152598 | 3365 | if ('valueRange' in attrs && !('isZoomedIgnoreProgrammaticZoom' in attrs)) { |
758a629f | 3366 | this.zoomed_y_ = (attrs.valueRange !== null); |
6a1aa64f | 3367 | } |
450fe64b DV |
3368 | |
3369 | // TODO(danvk): validate per-series options. | |
46dde5f9 DV |
3370 | // Supported: |
3371 | // strokeWidth | |
3372 | // pointSize | |
3373 | // drawPoints | |
3374 | // highlightCircleSize | |
450fe64b | 3375 | |
9ca829f2 DV |
3376 | // Check if this set options will require new points. |
3377 | var requiresNewPoints = Dygraph.isPixelChangingOptionList(this.attr_("labels"), attrs); | |
3378 | ||
48e614ac | 3379 | Dygraph.updateDeep(this.user_attrs_, attrs); |
285a6bda | 3380 | |
48e614ac DV |
3381 | if (file) { |
3382 | this.file_ = file; | |
ccfcc169 | 3383 | if (!block_redraw) this.start_(); |
6a1aa64f | 3384 | } else { |
9ca829f2 DV |
3385 | if (!block_redraw) { |
3386 | if (requiresNewPoints) { | |
48e614ac | 3387 | this.predraw_(); |
9ca829f2 DV |
3388 | } else { |
3389 | this.renderGraph_(false, false); | |
3390 | } | |
3391 | } | |
6a1aa64f DV |
3392 | } |
3393 | }; | |
3394 | ||
3395 | /** | |
48e614ac DV |
3396 | * Returns a copy of the options with deprecated names converted into current |
3397 | * names. Also drops the (potentially-large) 'file' attribute. If the caller is | |
3398 | * interested in that, they should save a copy before calling this. | |
3399 | * @private | |
3400 | */ | |
3401 | Dygraph.mapLegacyOptions_ = function(attrs) { | |
3402 | var my_attrs = {}; | |
3403 | for (var k in attrs) { | |
3404 | if (k == 'file') continue; | |
3405 | if (attrs.hasOwnProperty(k)) my_attrs[k] = attrs[k]; | |
3406 | } | |
3407 | ||
3408 | var set = function(axis, opt, value) { | |
3409 | if (!my_attrs.axes) my_attrs.axes = {}; | |
3410 | if (!my_attrs.axes[axis]) my_attrs.axes[axis] = {}; | |
3411 | my_attrs.axes[axis][opt] = value; | |
3412 | }; | |
3413 | var map = function(opt, axis, new_opt) { | |
3414 | if (typeof(attrs[opt]) != 'undefined') { | |
3415 | set(axis, new_opt, attrs[opt]); | |
3416 | delete my_attrs[opt]; | |
3417 | } | |
3418 | }; | |
3419 | ||
3420 | // This maps, e.g., xValueFormater -> axes: { x: { valueFormatter: ... } } | |
3421 | map('xValueFormatter', 'x', 'valueFormatter'); | |
3422 | map('pixelsPerXLabel', 'x', 'pixelsPerLabel'); | |
3423 | map('xAxisLabelFormatter', 'x', 'axisLabelFormatter'); | |
3424 | map('xTicker', 'x', 'ticker'); | |
3425 | map('yValueFormatter', 'y', 'valueFormatter'); | |
3426 | map('pixelsPerYLabel', 'y', 'pixelsPerLabel'); | |
3427 | map('yAxisLabelFormatter', 'y', 'axisLabelFormatter'); | |
3428 | map('yTicker', 'y', 'ticker'); | |
3429 | return my_attrs; | |
3430 | }; | |
3431 | ||
3432 | /** | |
697e70b2 DV |
3433 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
3434 | * containing div (which has presumably changed size since the dygraph was | |
3435 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
3436 | * |
3437 | * This is far more efficient than destroying and re-instantiating a | |
3438 | * Dygraph, since it doesn't have to reparse the underlying data. | |
3439 | * | |
629a09ae DV |
3440 | * @param {Number} [width] Width (in pixels) |
3441 | * @param {Number} [height] Height (in pixels) | |
697e70b2 DV |
3442 | */ |
3443 | Dygraph.prototype.resize = function(width, height) { | |
e8c7ef86 DV |
3444 | if (this.resize_lock) { |
3445 | return; | |
3446 | } | |
3447 | this.resize_lock = true; | |
3448 | ||
697e70b2 DV |
3449 | if ((width === null) != (height === null)) { |
3450 | this.warn("Dygraph.resize() should be called with zero parameters or " + | |
3451 | "two non-NULL parameters. Pretending it was zero."); | |
3452 | width = height = null; | |
3453 | } | |
3454 | ||
4b4d1a63 DV |
3455 | var old_width = this.width_; |
3456 | var old_height = this.height_; | |
b16e6369 | 3457 | |
697e70b2 DV |
3458 | if (width) { |
3459 | this.maindiv_.style.width = width + "px"; | |
3460 | this.maindiv_.style.height = height + "px"; | |
3461 | this.width_ = width; | |
3462 | this.height_ = height; | |
3463 | } else { | |
ccd9d7c2 PF |
3464 | this.width_ = this.maindiv_.clientWidth; |
3465 | this.height_ = this.maindiv_.clientHeight; | |
697e70b2 DV |
3466 | } |
3467 | ||
4b4d1a63 DV |
3468 | if (old_width != this.width_ || old_height != this.height_) { |
3469 | // TODO(danvk): there should be a clear() method. | |
3470 | this.maindiv_.innerHTML = ""; | |
77b5e09d | 3471 | this.roller_ = null; |
4b4d1a63 DV |
3472 | this.attrs_.labelsDiv = null; |
3473 | this.createInterface_(); | |
c9faeafd DV |
3474 | if (this.annotations_.length) { |
3475 | // createInterface_ reset the layout, so we need to do this. | |
3476 | this.layout_.setAnnotations(this.annotations_); | |
3477 | } | |
4b4d1a63 DV |
3478 | this.predraw_(); |
3479 | } | |
e8c7ef86 DV |
3480 | |
3481 | this.resize_lock = false; | |
697e70b2 DV |
3482 | }; |
3483 | ||
3484 | /** | |
6faebb69 | 3485 | * Adjusts the number of points in the rolling average. Updates the graph to |
6a1aa64f | 3486 | * reflect the new averaging period. |
6faebb69 | 3487 | * @param {Number} length Number of points over which to average the data. |
6a1aa64f | 3488 | */ |
285a6bda | 3489 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f | 3490 | this.rollPeriod_ = length; |
26ca7938 | 3491 | this.predraw_(); |
6a1aa64f | 3492 | }; |
540d00f1 | 3493 | |
f8cfec73 | 3494 | /** |
1cf11047 DV |
3495 | * Returns a boolean array of visibility statuses. |
3496 | */ | |
3497 | Dygraph.prototype.visibility = function() { | |
3498 | // Do lazy-initialization, so that this happens after we know the number of | |
3499 | // data series. | |
3500 | if (!this.attr_("visibility")) { | |
758a629f | 3501 | this.attrs_.visibility = []; |
1cf11047 | 3502 | } |
758a629f | 3503 | // TODO(danvk): it looks like this could go into an infinite loop w/ user_attrs. |
395e98a3 | 3504 | while (this.attr_("visibility").length < this.numColumns() - 1) { |
758a629f | 3505 | this.attrs_.visibility.push(true); |
1cf11047 DV |
3506 | } |
3507 | return this.attr_("visibility"); | |
3508 | }; | |
3509 | ||
3510 | /** | |
3511 | * Changes the visiblity of a series. | |
3512 | */ | |
3513 | Dygraph.prototype.setVisibility = function(num, value) { | |
3514 | var x = this.visibility(); | |
a6c109c1 | 3515 | if (num < 0 || num >= x.length) { |
1cf11047 DV |
3516 | this.warn("invalid series number in setVisibility: " + num); |
3517 | } else { | |
3518 | x[num] = value; | |
26ca7938 | 3519 | this.predraw_(); |
1cf11047 DV |
3520 | } |
3521 | }; | |
3522 | ||
3523 | /** | |
0cb9bd91 DV |
3524 | * How large of an area will the dygraph render itself in? |
3525 | * This is used for testing. | |
3526 | * @return A {width: w, height: h} object. | |
3527 | * @private | |
3528 | */ | |
3529 | Dygraph.prototype.size = function() { | |
3530 | return { width: this.width_, height: this.height_ }; | |
3531 | }; | |
3532 | ||
3533 | /** | |
5c528fa2 | 3534 | * Update the list of annotations and redraw the chart. |
41ee764f DV |
3535 | * See dygraphs.com/annotations.html for more info on how to use annotations. |
3536 | * @param ann {Array} An array of annotation objects. | |
3537 | * @param suppressDraw {Boolean} Set to "true" to block chart redraw (optional). | |
5c528fa2 | 3538 | */ |
a685723c | 3539 | Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { |
3c51ab74 DV |
3540 | // Only add the annotation CSS rule once we know it will be used. |
3541 | Dygraph.addAnnotationRule(); | |
5c528fa2 DV |
3542 | this.annotations_ = ann; |
3543 | this.layout_.setAnnotations(this.annotations_); | |
a685723c | 3544 | if (!suppressDraw) { |
26ca7938 | 3545 | this.predraw_(); |
a685723c | 3546 | } |
5c528fa2 DV |
3547 | }; |
3548 | ||
3549 | /** | |
3550 | * Return the list of annotations. | |
3551 | */ | |
3552 | Dygraph.prototype.annotations = function() { | |
3553 | return this.annotations_; | |
3554 | }; | |
3555 | ||
46dde5f9 | 3556 | /** |
82c6fe4d KW |
3557 | * Get the list of label names for this graph. The first column is the |
3558 | * x-axis, so the data series names start at index 1. | |
3559 | */ | |
3560 | Dygraph.prototype.getLabels = function(name) { | |
3561 | return this.attr_("labels").slice(); | |
3562 | }; | |
3563 | ||
3564 | /** | |
46dde5f9 DV |
3565 | * Get the index of a series (column) given its name. The first column is the |
3566 | * x-axis, so the data series start with index 1. | |
3567 | */ | |
3568 | Dygraph.prototype.indexFromSetName = function(name) { | |
82c6fe4d | 3569 | return this.setIndexByName_[name]; |
46dde5f9 DV |
3570 | }; |
3571 | ||
629a09ae | 3572 | /** |
857a6931 KW |
3573 | * Get the internal dataset index given its name. These are numbered starting from 0, |
3574 | * and only count visible sets. | |
3575 | * @private | |
3576 | */ | |
3577 | Dygraph.prototype.datasetIndexFromSetName_ = function(name) { | |
3578 | return this.datasetIndex_[this.indexFromSetName(name)]; | |
3579 | }; | |
3580 | ||
3581 | /** | |
629a09ae DV |
3582 | * @private |
3583 | * Adds a default style for the annotation CSS classes to the document. This is | |
3584 | * only executed when annotations are actually used. It is designed to only be | |
3585 | * called once -- all calls after the first will return immediately. | |
3586 | */ | |
5c528fa2 DV |
3587 | Dygraph.addAnnotationRule = function() { |
3588 | if (Dygraph.addedAnnotationCSS) return; | |
3589 | ||
5c528fa2 DV |
3590 | var rule = "border: 1px solid black; " + |
3591 | "background-color: white; " + | |
3592 | "text-align: center;"; | |
22186871 DV |
3593 | |
3594 | var styleSheetElement = document.createElement("style"); | |
3595 | styleSheetElement.type = "text/css"; | |
3596 | document.getElementsByTagName("head")[0].appendChild(styleSheetElement); | |
3597 | ||
3598 | // Find the first style sheet that we can access. | |
3599 | // We may not add a rule to a style sheet from another domain for security | |
3600 | // reasons. This sometimes comes up when using gviz, since the Google gviz JS | |
3601 | // adds its own style sheets from google.com. | |
3602 | for (var i = 0; i < document.styleSheets.length; i++) { | |
3603 | if (document.styleSheets[i].disabled) continue; | |
3604 | var mysheet = document.styleSheets[i]; | |
3605 | try { | |
3606 | if (mysheet.insertRule) { // Firefox | |
3607 | var idx = mysheet.cssRules ? mysheet.cssRules.length : 0; | |
3608 | mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", idx); | |
3609 | } else if (mysheet.addRule) { // IE | |
3610 | mysheet.addRule(".dygraphDefaultAnnotation", rule); | |
3611 | } | |
3612 | Dygraph.addedAnnotationCSS = true; | |
3613 | return; | |
3614 | } catch(err) { | |
3615 | // Was likely a security exception. | |
3616 | } | |
5c528fa2 DV |
3617 | } |
3618 | ||
22186871 | 3619 | this.warn("Unable to add default annotation CSS rule; display may be off."); |
758a629f | 3620 | }; |
5c528fa2 | 3621 | |
285a6bda | 3622 | // Older pages may still use this name. |
c0f54d4f | 3623 | var DateGraph = Dygraph; |