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6a1aa64f DV |
1 | // Copyright 2006 Dan Vanderkam (danvdk@gmail.com) |
2 | // All Rights Reserved. | |
3 | ||
4 | /** | |
5 | * @fileoverview Creates an interactive, zoomable graph based on a CSV file or | |
285a6bda DV |
6 | * string. Dygraph can handle multiple series with or without error bars. The |
7 | * date/value ranges will be automatically set. Dygraph uses the | |
6a1aa64f DV |
8 | * <canvas> tag, so it only works in FF1.5+. |
9 | * @author danvdk@gmail.com (Dan Vanderkam) | |
10 | ||
11 | Usage: | |
12 | <div id="graphdiv" style="width:800px; height:500px;"></div> | |
13 | <script type="text/javascript"> | |
285a6bda DV |
14 | new Dygraph(document.getElementById("graphdiv"), |
15 | "datafile.csv", // CSV file with headers | |
16 | { }); // options | |
6a1aa64f DV |
17 | </script> |
18 | ||
19 | The CSV file is of the form | |
20 | ||
285a6bda | 21 | Date,SeriesA,SeriesB,SeriesC |
6a1aa64f DV |
22 | YYYYMMDD,A1,B1,C1 |
23 | YYYYMMDD,A2,B2,C2 | |
24 | ||
6a1aa64f DV |
25 | If the 'errorBars' option is set in the constructor, the input should be of |
26 | the form | |
285a6bda | 27 | Date,SeriesA,SeriesB,... |
6a1aa64f DV |
28 | YYYYMMDD,A1,sigmaA1,B1,sigmaB1,... |
29 | YYYYMMDD,A2,sigmaA2,B2,sigmaB2,... | |
30 | ||
31 | If the 'fractions' option is set, the input should be of the form: | |
32 | ||
285a6bda | 33 | Date,SeriesA,SeriesB,... |
6a1aa64f DV |
34 | YYYYMMDD,A1/B1,A2/B2,... |
35 | YYYYMMDD,A1/B1,A2/B2,... | |
36 | ||
37 | And error bars will be calculated automatically using a binomial distribution. | |
38 | ||
ee672584 | 39 | For further documentation and examples, see http://dygraphs.com/ |
6a1aa64f DV |
40 | |
41 | */ | |
42 | ||
43 | /** | |
44 | * An interactive, zoomable graph | |
45 | * @param {String | Function} file A file containing CSV data or a function that | |
46 | * returns this data. The expected format for each line is | |
47 | * YYYYMMDD,val1,val2,... or, if attrs.errorBars is set, | |
48 | * YYYYMMDD,val1,stddev1,val2,stddev2,... | |
6a1aa64f DV |
49 | * @param {Object} attrs Various other attributes, e.g. errorBars determines |
50 | * whether the input data contains error ranges. | |
51 | */ | |
285a6bda DV |
52 | Dygraph = function(div, data, opts) { |
53 | if (arguments.length > 0) { | |
54 | if (arguments.length == 4) { | |
55 | // Old versions of dygraphs took in the series labels as a constructor | |
56 | // parameter. This doesn't make sense anymore, but it's easy to continue | |
57 | // to support this usage. | |
58 | this.warn("Using deprecated four-argument dygraph constructor"); | |
59 | this.__old_init__(div, data, arguments[2], arguments[3]); | |
60 | } else { | |
61 | this.__init__(div, data, opts); | |
62 | } | |
63 | } | |
6a1aa64f DV |
64 | }; |
65 | ||
285a6bda DV |
66 | Dygraph.NAME = "Dygraph"; |
67 | Dygraph.VERSION = "1.2"; | |
68 | Dygraph.__repr__ = function() { | |
6a1aa64f DV |
69 | return "[" + this.NAME + " " + this.VERSION + "]"; |
70 | }; | |
285a6bda | 71 | Dygraph.toString = function() { |
6a1aa64f DV |
72 | return this.__repr__(); |
73 | }; | |
74 | ||
75 | // Various default values | |
285a6bda DV |
76 | Dygraph.DEFAULT_ROLL_PERIOD = 1; |
77 | Dygraph.DEFAULT_WIDTH = 480; | |
78 | Dygraph.DEFAULT_HEIGHT = 320; | |
79 | Dygraph.AXIS_LINE_WIDTH = 0.3; | |
6a1aa64f | 80 | |
d59b6f34 | 81 | Dygraph.LOG_SCALE = 10; |
0037b2a4 | 82 | Dygraph.LN_TEN = Math.log(Dygraph.LOG_SCALE); |
d59b6f34 | 83 | Dygraph.log10 = function(x) { |
0037b2a4 | 84 | return Math.log(x) / Dygraph.LN_TEN; |
d59b6f34 | 85 | } |
885c13e4 | 86 | |
8e4a6af3 | 87 | // Default attribute values. |
285a6bda | 88 | Dygraph.DEFAULT_ATTRS = { |
a9fc39ab | 89 | highlightCircleSize: 3, |
8e4a6af3 | 90 | pixelsPerXLabel: 60, |
c6336f04 | 91 | pixelsPerYLabel: 30, |
285a6bda | 92 | |
8e4a6af3 DV |
93 | labelsDivWidth: 250, |
94 | labelsDivStyles: { | |
95 | // TODO(danvk): move defaults from createStatusMessage_ here. | |
285a6bda DV |
96 | }, |
97 | labelsSeparateLines: false, | |
bcd3ebf0 | 98 | labelsShowZeroValues: true, |
285a6bda | 99 | labelsKMB: false, |
afefbcdb | 100 | labelsKMG2: false, |
d160cc3b | 101 | showLabelsOnHighlight: true, |
12e4c741 | 102 | |
029da4b6 | 103 | yValueFormatter: function(x) { return Dygraph.round_(x, 2); }, |
285a6bda DV |
104 | |
105 | strokeWidth: 1.0, | |
8e4a6af3 | 106 | |
8846615a DV |
107 | axisTickSize: 3, |
108 | axisLabelFontSize: 14, | |
109 | xAxisLabelWidth: 50, | |
110 | yAxisLabelWidth: 50, | |
bf640e56 | 111 | xAxisLabelFormatter: Dygraph.dateAxisFormatter, |
8846615a | 112 | rightGap: 5, |
285a6bda DV |
113 | |
114 | showRoller: false, | |
115 | xValueFormatter: Dygraph.dateString_, | |
116 | xValueParser: Dygraph.dateParser, | |
117 | xTicker: Dygraph.dateTicker, | |
118 | ||
3d67f03b DV |
119 | delimiter: ',', |
120 | ||
285a6bda DV |
121 | sigma: 2.0, |
122 | errorBars: false, | |
123 | fractions: false, | |
124 | wilsonInterval: true, // only relevant if fractions is true | |
5954ef32 | 125 | customBars: false, |
43af96e7 NK |
126 | fillGraph: false, |
127 | fillAlpha: 0.15, | |
f032c51d | 128 | connectSeparatedPoints: false, |
43af96e7 NK |
129 | |
130 | stackedGraph: false, | |
afdc483f NN |
131 | hideOverlayOnMouseOut: true, |
132 | ||
00c281d4 | 133 | stepPlot: false, |
ee672584 | 134 | avoidMinZero: false, |
4f0c5aa0 DV |
135 | |
136 | interactionModel: null // will be set to Dygraph.defaultInteractionModel. | |
285a6bda DV |
137 | }; |
138 | ||
139 | // Various logging levels. | |
140 | Dygraph.DEBUG = 1; | |
141 | Dygraph.INFO = 2; | |
142 | Dygraph.WARNING = 3; | |
143 | Dygraph.ERROR = 3; | |
144 | ||
39b0e098 RK |
145 | // Directions for panning and zooming. Use bit operations when combined |
146 | // values are possible. | |
147 | Dygraph.HORIZONTAL = 1; | |
148 | Dygraph.VERTICAL = 2; | |
149 | ||
5c528fa2 DV |
150 | // Used for initializing annotation CSS rules only once. |
151 | Dygraph.addedAnnotationCSS = false; | |
152 | ||
285a6bda DV |
153 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { |
154 | // Labels is no longer a constructor parameter, since it's typically set | |
155 | // directly from the data source. It also conains a name for the x-axis, | |
156 | // which the previous constructor form did not. | |
157 | if (labels != null) { | |
158 | var new_labels = ["Date"]; | |
159 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); | |
fc80a396 | 160 | Dygraph.update(attrs, { 'labels': new_labels }); |
285a6bda DV |
161 | } |
162 | this.__init__(div, file, attrs); | |
8e4a6af3 DV |
163 | }; |
164 | ||
6a1aa64f | 165 | /** |
285a6bda | 166 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
885c13e4 | 167 | * and context <canvas> inside of it. See the constructor for details. |
6a1aa64f | 168 | * on the parameters. |
12e4c741 | 169 | * @param {Element} div the Element to render the graph into. |
6a1aa64f | 170 | * @param {String | Function} file Source data |
6a1aa64f DV |
171 | * @param {Object} attrs Miscellaneous other options |
172 | * @private | |
173 | */ | |
285a6bda | 174 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
a2c8fff4 DV |
175 | // Hack for IE: if we're using excanvas and the document hasn't finished |
176 | // loading yet (and hence may not have initialized whatever it needs to | |
177 | // initialize), then keep calling this routine periodically until it has. | |
178 | if (/MSIE/.test(navigator.userAgent) && !window.opera && | |
179 | typeof(G_vmlCanvasManager) != 'undefined' && | |
180 | document.readyState != 'complete') { | |
181 | var self = this; | |
182 | setTimeout(function() { self.__init__(div, file, attrs) }, 100); | |
183 | } | |
184 | ||
285a6bda DV |
185 | // Support two-argument constructor |
186 | if (attrs == null) { attrs = {}; } | |
187 | ||
6a1aa64f | 188 | // Copy the important bits into the object |
32988383 | 189 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
6a1aa64f | 190 | this.maindiv_ = div; |
6a1aa64f | 191 | this.file_ = file; |
285a6bda | 192 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
6a1aa64f | 193 | this.previousVerticalX_ = -1; |
6a1aa64f | 194 | this.fractions_ = attrs.fractions || false; |
6a1aa64f | 195 | this.dateWindow_ = attrs.dateWindow || null; |
8b83c6cc | 196 | |
6a1aa64f | 197 | this.wilsonInterval_ = attrs.wilsonInterval || true; |
fe0b7c03 | 198 | this.is_initial_draw_ = true; |
5c528fa2 | 199 | this.annotations_ = []; |
8e4a6af3 | 200 | |
f7d6278e DV |
201 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
202 | // div, then only one will be drawn. | |
203 | div.innerHTML = ""; | |
204 | ||
c21d2c2d | 205 | // If the div isn't already sized then inherit from our attrs or |
206 | // give it a default size. | |
285a6bda | 207 | if (div.style.width == '') { |
ddd1b11f | 208 | div.style.width = (attrs.width || Dygraph.DEFAULT_WIDTH) + "px"; |
285a6bda DV |
209 | } |
210 | if (div.style.height == '') { | |
ddd1b11f | 211 | div.style.height = (attrs.height || Dygraph.DEFAULT_HEIGHT) + "px"; |
32988383 | 212 | } |
285a6bda DV |
213 | this.width_ = parseInt(div.style.width, 10); |
214 | this.height_ = parseInt(div.style.height, 10); | |
c21d2c2d | 215 | // The div might have been specified as percent of the current window size, |
216 | // convert that to an appropriate number of pixels. | |
217 | if (div.style.width.indexOf("%") == div.style.width.length - 1) { | |
c6f45033 | 218 | this.width_ = div.offsetWidth; |
c21d2c2d | 219 | } |
220 | if (div.style.height.indexOf("%") == div.style.height.length - 1) { | |
c6f45033 | 221 | this.height_ = div.offsetHeight; |
c21d2c2d | 222 | } |
32988383 | 223 | |
10a6456d DV |
224 | if (this.width_ == 0) { |
225 | this.error("dygraph has zero width. Please specify a width in pixels."); | |
226 | } | |
227 | if (this.height_ == 0) { | |
228 | this.error("dygraph has zero height. Please specify a height in pixels."); | |
229 | } | |
230 | ||
344ba8c0 | 231 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
43af96e7 NK |
232 | if (attrs['stackedGraph']) { |
233 | attrs['fillGraph'] = true; | |
234 | // TODO(nikhilk): Add any other stackedGraph checks here. | |
235 | } | |
236 | ||
285a6bda DV |
237 | // Dygraphs has many options, some of which interact with one another. |
238 | // To keep track of everything, we maintain two sets of options: | |
239 | // | |
c21d2c2d | 240 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
241 | // this.attrs_ defaults, options derived from user_attrs_, data. |
242 | // | |
243 | // Options are then accessed this.attr_('attr'), which first looks at | |
244 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
245 | // defaults without overriding behavior that the user specifically asks for. | |
246 | this.user_attrs_ = {}; | |
fc80a396 | 247 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 248 | |
285a6bda | 249 | this.attrs_ = {}; |
fc80a396 | 250 | Dygraph.update(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 251 | |
16269f6e | 252 | this.boundaryIds_ = []; |
6a1aa64f | 253 | |
285a6bda DV |
254 | // Make a note of whether labels will be pulled from the CSV file. |
255 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
6a1aa64f DV |
256 | |
257 | // Create the containing DIV and other interactive elements | |
258 | this.createInterface_(); | |
259 | ||
738fc797 | 260 | this.start_(); |
6a1aa64f DV |
261 | }; |
262 | ||
227b93cc DV |
263 | Dygraph.prototype.attr_ = function(name, seriesName) { |
264 | if (seriesName && | |
265 | typeof(this.user_attrs_[seriesName]) != 'undefined' && | |
266 | this.user_attrs_[seriesName] != null && | |
267 | typeof(this.user_attrs_[seriesName][name]) != 'undefined') { | |
268 | return this.user_attrs_[seriesName][name]; | |
450fe64b | 269 | } else if (typeof(this.user_attrs_[name]) != 'undefined') { |
285a6bda DV |
270 | return this.user_attrs_[name]; |
271 | } else if (typeof(this.attrs_[name]) != 'undefined') { | |
272 | return this.attrs_[name]; | |
273 | } else { | |
274 | return null; | |
275 | } | |
276 | }; | |
277 | ||
278 | // TODO(danvk): any way I can get the line numbers to be this.warn call? | |
279 | Dygraph.prototype.log = function(severity, message) { | |
280 | if (typeof(console) != 'undefined') { | |
281 | switch (severity) { | |
282 | case Dygraph.DEBUG: | |
283 | console.debug('dygraphs: ' + message); | |
284 | break; | |
285 | case Dygraph.INFO: | |
286 | console.info('dygraphs: ' + message); | |
287 | break; | |
288 | case Dygraph.WARNING: | |
289 | console.warn('dygraphs: ' + message); | |
290 | break; | |
291 | case Dygraph.ERROR: | |
292 | console.error('dygraphs: ' + message); | |
293 | break; | |
294 | } | |
295 | } | |
296 | } | |
297 | Dygraph.prototype.info = function(message) { | |
298 | this.log(Dygraph.INFO, message); | |
299 | } | |
300 | Dygraph.prototype.warn = function(message) { | |
301 | this.log(Dygraph.WARNING, message); | |
302 | } | |
303 | Dygraph.prototype.error = function(message) { | |
304 | this.log(Dygraph.ERROR, message); | |
305 | } | |
306 | ||
6a1aa64f DV |
307 | /** |
308 | * Returns the current rolling period, as set by the user or an option. | |
309 | * @return {Number} The number of days in the rolling window | |
310 | */ | |
285a6bda | 311 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 312 | return this.rollPeriod_; |
76171648 DV |
313 | }; |
314 | ||
599fb4ad DV |
315 | /** |
316 | * Returns the currently-visible x-range. This can be affected by zooming, | |
317 | * panning or a call to updateOptions. | |
318 | * Returns a two-element array: [left, right]. | |
319 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
320 | */ | |
321 | Dygraph.prototype.xAxisRange = function() { | |
322 | if (this.dateWindow_) return this.dateWindow_; | |
323 | ||
324 | // The entire chart is visible. | |
325 | var left = this.rawData_[0][0]; | |
326 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
327 | return [left, right]; | |
328 | }; | |
329 | ||
3230c662 | 330 | /** |
d58ae307 DV |
331 | * Returns the currently-visible y-range for an axis. This can be affected by |
332 | * zooming, panning or a call to updateOptions. Axis indices are zero-based. If | |
333 | * called with no arguments, returns the range of the first axis. | |
3230c662 DV |
334 | * Returns a two-element array: [bottom, top]. |
335 | */ | |
d58ae307 | 336 | Dygraph.prototype.yAxisRange = function(idx) { |
d63e6799 | 337 | if (typeof(idx) == "undefined") idx = 0; |
d58ae307 DV |
338 | if (idx < 0 || idx >= this.axes_.length) return null; |
339 | return [ this.axes_[idx].computedValueRange[0], | |
340 | this.axes_[idx].computedValueRange[1] ]; | |
341 | }; | |
342 | ||
343 | /** | |
344 | * Returns the currently-visible y-ranges for each axis. This can be affected by | |
345 | * zooming, panning, calls to updateOptions, etc. | |
346 | * Returns an array of [bottom, top] pairs, one for each y-axis. | |
347 | */ | |
348 | Dygraph.prototype.yAxisRanges = function() { | |
349 | var ret = []; | |
350 | for (var i = 0; i < this.axes_.length; i++) { | |
351 | ret.push(this.yAxisRange(i)); | |
352 | } | |
353 | return ret; | |
3230c662 DV |
354 | }; |
355 | ||
d58ae307 | 356 | // TODO(danvk): use these functions throughout dygraphs. |
3230c662 DV |
357 | /** |
358 | * Convert from data coordinates to canvas/div X/Y coordinates. | |
d58ae307 DV |
359 | * If specified, do this conversion for the coordinate system of a particular |
360 | * axis. Uses the first axis by default. | |
3230c662 | 361 | * Returns a two-element array: [X, Y] |
ff022deb | 362 | * |
0747928a | 363 | * Note: use toDomXCoord instead of toDomCoords(x, null) and use toDomYCoord |
ff022deb | 364 | * instead of toDomCoords(null, y, axis). |
3230c662 | 365 | */ |
d58ae307 | 366 | Dygraph.prototype.toDomCoords = function(x, y, axis) { |
ff022deb RK |
367 | return [ this.toDomXCoord(x), this.toDomYCoord(y, axis) ]; |
368 | }; | |
369 | ||
370 | /** | |
371 | * Convert from data x coordinates to canvas/div X coordinate. | |
372 | * If specified, do this conversion for the coordinate system of a particular | |
0037b2a4 RK |
373 | * axis. |
374 | * Returns a single value or null if x is null. | |
ff022deb RK |
375 | */ |
376 | Dygraph.prototype.toDomXCoord = function(x) { | |
377 | if (x == null) { | |
378 | return null; | |
379 | }; | |
380 | ||
3230c662 | 381 | var area = this.plotter_.area; |
ff022deb RK |
382 | var xRange = this.xAxisRange(); |
383 | return area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; | |
384 | } | |
3230c662 | 385 | |
ff022deb RK |
386 | /** |
387 | * Convert from data x coordinates to canvas/div Y coordinate and optional | |
388 | * axis. Uses the first axis by default. | |
389 | * | |
390 | * returns a single value or null if y is null. | |
391 | */ | |
392 | Dygraph.prototype.toDomYCoord = function(y, axis) { | |
0747928a | 393 | var pct = this.toPercentYCoord(y, axis); |
3230c662 | 394 | |
ff022deb RK |
395 | if (pct == null) { |
396 | return null; | |
397 | } | |
e4416fb9 | 398 | var area = this.plotter_.area; |
ff022deb RK |
399 | return area.y + pct * area.h; |
400 | } | |
3230c662 DV |
401 | |
402 | /** | |
403 | * Convert from canvas/div coords to data coordinates. | |
d58ae307 DV |
404 | * If specified, do this conversion for the coordinate system of a particular |
405 | * axis. Uses the first axis by default. | |
ff022deb RK |
406 | * Returns a two-element array: [X, Y]. |
407 | * | |
0747928a | 408 | * Note: use toDataXCoord instead of toDataCoords(x, null) and use toDataYCoord |
ff022deb | 409 | * instead of toDataCoords(null, y, axis). |
3230c662 | 410 | */ |
d58ae307 | 411 | Dygraph.prototype.toDataCoords = function(x, y, axis) { |
ff022deb RK |
412 | return [ this.toDataXCoord(x), this.toDataYCoord(y, axis) ]; |
413 | }; | |
414 | ||
415 | /** | |
416 | * Convert from canvas/div x coordinate to data coordinate. | |
417 | * | |
418 | * If x is null, this returns null. | |
419 | */ | |
420 | Dygraph.prototype.toDataXCoord = function(x) { | |
421 | if (x == null) { | |
422 | return null; | |
3230c662 DV |
423 | } |
424 | ||
ff022deb RK |
425 | var area = this.plotter_.area; |
426 | var xRange = this.xAxisRange(); | |
427 | return xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); | |
428 | }; | |
429 | ||
430 | /** | |
431 | * Convert from canvas/div y coord to value. | |
432 | * | |
433 | * If y is null, this returns null. | |
434 | * if axis is null, this uses the first axis. | |
435 | */ | |
436 | Dygraph.prototype.toDataYCoord = function(y, axis) { | |
437 | if (y == null) { | |
438 | return null; | |
3230c662 DV |
439 | } |
440 | ||
ff022deb RK |
441 | var area = this.plotter_.area; |
442 | var yRange = this.yAxisRange(axis); | |
443 | ||
7d0e7a0d | 444 | if (!axis.logscale) { |
ff022deb RK |
445 | return yRange[0] + (area.h - y) / area.h * (yRange[1] - yRange[0]); |
446 | } else { | |
447 | // Computing the inverse of toDomCoord. | |
448 | var pct = (y - area.y) / area.h | |
449 | ||
450 | // Computing the inverse of toPercentYCoord. The function was arrived at with | |
451 | // the following steps: | |
452 | // | |
453 | // Original calcuation: | |
d59b6f34 | 454 | // pct = (logr1 - Dygraph.log10(y)) / (logr1 - Dygraph.log10(yRange[0])); |
ff022deb RK |
455 | // |
456 | // Move denominator to both sides: | |
d59b6f34 | 457 | // pct * (logr1 - Dygraph.log10(yRange[0])) = logr1 - Dygraph.log10(y); |
ff022deb RK |
458 | // |
459 | // subtract logr1, and take the negative value. | |
d59b6f34 | 460 | // logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))) = Dygraph.log10(y); |
ff022deb RK |
461 | // |
462 | // Swap both sides of the equation, and we can compute the log of the | |
463 | // return value. Which means we just need to use that as the exponent in | |
464 | // e^exponent. | |
d59b6f34 | 465 | // Dygraph.log10(y) = logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))); |
ff022deb | 466 | |
d59b6f34 RK |
467 | var logr1 = Dygraph.log10(yRange[1]); |
468 | var exponent = logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))); | |
469 | var value = Math.pow(Dygraph.LOG_SCALE, exponent); | |
ff022deb RK |
470 | return value; |
471 | } | |
3230c662 DV |
472 | }; |
473 | ||
e99fde05 | 474 | /** |
ff022deb RK |
475 | * Converts a y for an axis to a percentage from the top to the |
476 | * bottom of the div. | |
477 | * | |
478 | * If the coordinate represents a value visible on the canvas, then | |
479 | * the value will be between 0 and 1, where 0 is the top of the canvas. | |
480 | * However, this method will return values outside the range, as | |
481 | * values can fall outside the canvas. | |
482 | * | |
483 | * If y is null, this returns null. | |
484 | * if axis is null, this uses the first axis. | |
485 | */ | |
486 | Dygraph.prototype.toPercentYCoord = function(y, axis) { | |
487 | if (y == null) { | |
488 | return null; | |
489 | } | |
7d0e7a0d | 490 | if (typeof(axis) == "undefined") axis = 0; |
ff022deb RK |
491 | |
492 | var area = this.plotter_.area; | |
493 | var yRange = this.yAxisRange(axis); | |
494 | ||
495 | var pct; | |
7d0e7a0d | 496 | if (!this.axes_[axis].logscale) { |
ff022deb RK |
497 | // yrange[1] - y is unit distance from the bottom. |
498 | // yrange[1] - yrange[0] is the scale of the range. | |
499 | // (yRange[1] - y) / (yRange[1] - yRange[0]) is the % from the bottom. | |
500 | pct = (yRange[1] - y) / (yRange[1] - yRange[0]); | |
501 | } else { | |
d59b6f34 RK |
502 | var logr1 = Dygraph.log10(yRange[1]); |
503 | pct = (logr1 - Dygraph.log10(y)) / (logr1 - Dygraph.log10(yRange[0])); | |
ff022deb RK |
504 | } |
505 | return pct; | |
506 | } | |
507 | ||
508 | /** | |
e99fde05 DV |
509 | * Returns the number of columns (including the independent variable). |
510 | */ | |
511 | Dygraph.prototype.numColumns = function() { | |
512 | return this.rawData_[0].length; | |
513 | }; | |
514 | ||
515 | /** | |
516 | * Returns the number of rows (excluding any header/label row). | |
517 | */ | |
518 | Dygraph.prototype.numRows = function() { | |
519 | return this.rawData_.length; | |
520 | }; | |
521 | ||
522 | /** | |
523 | * Returns the value in the given row and column. If the row and column exceed | |
524 | * the bounds on the data, returns null. Also returns null if the value is | |
525 | * missing. | |
526 | */ | |
527 | Dygraph.prototype.getValue = function(row, col) { | |
528 | if (row < 0 || row > this.rawData_.length) return null; | |
529 | if (col < 0 || col > this.rawData_[row].length) return null; | |
530 | ||
531 | return this.rawData_[row][col]; | |
532 | }; | |
533 | ||
76171648 DV |
534 | Dygraph.addEvent = function(el, evt, fn) { |
535 | var normed_fn = function(e) { | |
536 | if (!e) var e = window.event; | |
537 | fn(e); | |
538 | }; | |
539 | if (window.addEventListener) { // Mozilla, Netscape, Firefox | |
540 | el.addEventListener(evt, normed_fn, false); | |
541 | } else { // IE | |
542 | el.attachEvent('on' + evt, normed_fn); | |
543 | } | |
544 | }; | |
6a1aa64f | 545 | |
ee672584 | 546 | |
ee672584 RK |
547 | // Based on the article at |
548 | // http://www.switchonthecode.com/tutorials/javascript-tutorial-the-scroll-wheel | |
ee672584 RK |
549 | Dygraph.cancelEvent = function(e) { |
550 | e = e ? e : window.event; | |
551 | if (e.stopPropagation) { | |
552 | e.stopPropagation(); | |
553 | } | |
554 | if (e.preventDefault) { | |
555 | e.preventDefault(); | |
556 | } | |
557 | e.cancelBubble = true; | |
558 | e.cancel = true; | |
559 | e.returnValue = false; | |
560 | return false; | |
561 | } | |
562 | ||
6a1aa64f | 563 | /** |
285a6bda | 564 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 565 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 566 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
567 | * @private |
568 | */ | |
285a6bda | 569 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
570 | // Create the all-enclosing graph div |
571 | var enclosing = this.maindiv_; | |
572 | ||
b0c3b730 DV |
573 | this.graphDiv = document.createElement("div"); |
574 | this.graphDiv.style.width = this.width_ + "px"; | |
575 | this.graphDiv.style.height = this.height_ + "px"; | |
576 | enclosing.appendChild(this.graphDiv); | |
577 | ||
578 | // Create the canvas for interactive parts of the chart. | |
f8cfec73 | 579 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 DV |
580 | this.canvas_.style.position = "absolute"; |
581 | this.canvas_.width = this.width_; | |
582 | this.canvas_.height = this.height_; | |
f8cfec73 DV |
583 | this.canvas_.style.width = this.width_ + "px"; // for IE |
584 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
b0c3b730 DV |
585 | |
586 | // ... and for static parts of the chart. | |
6a1aa64f | 587 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
76171648 | 588 | |
eb7bf005 EC |
589 | // The interactive parts of the graph are drawn on top of the chart. |
590 | this.graphDiv.appendChild(this.hidden_); | |
591 | this.graphDiv.appendChild(this.canvas_); | |
592 | this.mouseEventElement_ = this.canvas_; | |
593 | ||
76171648 | 594 | var dygraph = this; |
eb7bf005 | 595 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(e) { |
76171648 DV |
596 | dygraph.mouseMove_(e); |
597 | }); | |
eb7bf005 | 598 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(e) { |
76171648 DV |
599 | dygraph.mouseOut_(e); |
600 | }); | |
697e70b2 DV |
601 | |
602 | // Create the grapher | |
603 | // TODO(danvk): why does the Layout need its own set of options? | |
604 | this.layoutOptions_ = { 'xOriginIsZero': false }; | |
605 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
606 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
607 | Dygraph.update(this.layoutOptions_, { | |
608 | 'errorBars': (this.attr_("errorBars") || this.attr_("customBars")) }); | |
609 | ||
610 | this.layout_ = new DygraphLayout(this, this.layoutOptions_); | |
611 | ||
612 | // TODO(danvk): why does the Renderer need its own set of options? | |
613 | this.renderOptions_ = { colorScheme: this.colors_, | |
614 | strokeColor: null, | |
615 | axisLineWidth: Dygraph.AXIS_LINE_WIDTH }; | |
616 | Dygraph.update(this.renderOptions_, this.attrs_); | |
617 | Dygraph.update(this.renderOptions_, this.user_attrs_); | |
697e70b2 DV |
618 | |
619 | this.createStatusMessage_(); | |
697e70b2 | 620 | this.createDragInterface_(); |
4cfcc38c DV |
621 | }; |
622 | ||
623 | /** | |
624 | * Detach DOM elements in the dygraph and null out all data references. | |
625 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
626 | * usage. See, e.g., the tests/perf.html example. | |
627 | */ | |
628 | Dygraph.prototype.destroy = function() { | |
629 | var removeRecursive = function(node) { | |
630 | while (node.hasChildNodes()) { | |
631 | removeRecursive(node.firstChild); | |
632 | node.removeChild(node.firstChild); | |
633 | } | |
634 | }; | |
635 | removeRecursive(this.maindiv_); | |
636 | ||
637 | var nullOut = function(obj) { | |
638 | for (var n in obj) { | |
639 | if (typeof(obj[n]) === 'object') { | |
640 | obj[n] = null; | |
641 | } | |
642 | } | |
643 | }; | |
644 | ||
645 | // These may not all be necessary, but it can't hurt... | |
646 | nullOut(this.layout_); | |
647 | nullOut(this.plotter_); | |
648 | nullOut(this); | |
649 | }; | |
6a1aa64f DV |
650 | |
651 | /** | |
652 | * Creates the canvas containing the PlotKit graph. Only plotkit ever draws on | |
285a6bda | 653 | * this particular canvas. All Dygraph work is done on this.canvas_. |
8846615a | 654 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
655 | * @return {Object} The newly-created canvas |
656 | * @private | |
657 | */ | |
285a6bda | 658 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 | 659 | var h = Dygraph.createCanvas(); |
6a1aa64f | 660 | h.style.position = "absolute"; |
9ac5e4ae DV |
661 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
662 | // some extra area to make it easier to zoom in on the far left and far | |
663 | // right. h needs to be precisely the plot area, so that clipping occurs. | |
6a1aa64f DV |
664 | h.style.top = canvas.style.top; |
665 | h.style.left = canvas.style.left; | |
666 | h.width = this.width_; | |
667 | h.height = this.height_; | |
f8cfec73 DV |
668 | h.style.width = this.width_ + "px"; // for IE |
669 | h.style.height = this.height_ + "px"; // for IE | |
6a1aa64f DV |
670 | return h; |
671 | }; | |
672 | ||
f474c2a3 DV |
673 | // Taken from MochiKit.Color |
674 | Dygraph.hsvToRGB = function (hue, saturation, value) { | |
675 | var red; | |
676 | var green; | |
677 | var blue; | |
678 | if (saturation === 0) { | |
679 | red = value; | |
680 | green = value; | |
681 | blue = value; | |
682 | } else { | |
683 | var i = Math.floor(hue * 6); | |
684 | var f = (hue * 6) - i; | |
685 | var p = value * (1 - saturation); | |
686 | var q = value * (1 - (saturation * f)); | |
687 | var t = value * (1 - (saturation * (1 - f))); | |
688 | switch (i) { | |
689 | case 1: red = q; green = value; blue = p; break; | |
690 | case 2: red = p; green = value; blue = t; break; | |
691 | case 3: red = p; green = q; blue = value; break; | |
692 | case 4: red = t; green = p; blue = value; break; | |
693 | case 5: red = value; green = p; blue = q; break; | |
694 | case 6: // fall through | |
695 | case 0: red = value; green = t; blue = p; break; | |
696 | } | |
697 | } | |
698 | red = Math.floor(255 * red + 0.5); | |
699 | green = Math.floor(255 * green + 0.5); | |
700 | blue = Math.floor(255 * blue + 0.5); | |
701 | return 'rgb(' + red + ',' + green + ',' + blue + ')'; | |
702 | }; | |
703 | ||
704 | ||
6a1aa64f DV |
705 | /** |
706 | * Generate a set of distinct colors for the data series. This is done with a | |
707 | * color wheel. Saturation/Value are customizable, and the hue is | |
708 | * equally-spaced around the color wheel. If a custom set of colors is | |
709 | * specified, that is used instead. | |
6a1aa64f DV |
710 | * @private |
711 | */ | |
285a6bda DV |
712 | Dygraph.prototype.setColors_ = function() { |
713 | // TODO(danvk): compute this directly into this.attrs_['colorScheme'] and do | |
714 | // away with this.renderOptions_. | |
715 | var num = this.attr_("labels").length - 1; | |
6a1aa64f | 716 | this.colors_ = []; |
285a6bda DV |
717 | var colors = this.attr_('colors'); |
718 | if (!colors) { | |
719 | var sat = this.attr_('colorSaturation') || 1.0; | |
720 | var val = this.attr_('colorValue') || 0.5; | |
2aa21213 | 721 | var half = Math.ceil(num / 2); |
6a1aa64f | 722 | for (var i = 1; i <= num; i++) { |
ec1959eb | 723 | if (!this.visibility()[i-1]) continue; |
43af96e7 | 724 | // alternate colors for high contrast. |
2aa21213 | 725 | var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2); |
43af96e7 NK |
726 | var hue = (1.0 * idx/ (1 + num)); |
727 | this.colors_.push(Dygraph.hsvToRGB(hue, sat, val)); | |
6a1aa64f DV |
728 | } |
729 | } else { | |
730 | for (var i = 0; i < num; i++) { | |
ec1959eb | 731 | if (!this.visibility()[i]) continue; |
285a6bda | 732 | var colorStr = colors[i % colors.length]; |
f474c2a3 | 733 | this.colors_.push(colorStr); |
6a1aa64f DV |
734 | } |
735 | } | |
285a6bda | 736 | |
c21d2c2d | 737 | // TODO(danvk): update this w/r/t/ the new options system. |
285a6bda | 738 | this.renderOptions_.colorScheme = this.colors_; |
fc80a396 DV |
739 | Dygraph.update(this.plotter_.options, this.renderOptions_); |
740 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
741 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
6a1aa64f DV |
742 | } |
743 | ||
43af96e7 NK |
744 | /** |
745 | * Return the list of colors. This is either the list of colors passed in the | |
746 | * attributes, or the autogenerated list of rgb(r,g,b) strings. | |
747 | * @return {Array<string>} The list of colors. | |
748 | */ | |
749 | Dygraph.prototype.getColors = function() { | |
750 | return this.colors_; | |
751 | }; | |
752 | ||
5e60386d DV |
753 | // The following functions are from quirksmode.org with a modification for Safari from |
754 | // http://blog.firetree.net/2005/07/04/javascript-find-position/ | |
3df0ccf0 DV |
755 | // http://www.quirksmode.org/js/findpos.html |
756 | Dygraph.findPosX = function(obj) { | |
757 | var curleft = 0; | |
5e60386d | 758 | if(obj.offsetParent) |
50360fd0 | 759 | while(1) |
5e60386d | 760 | { |
3df0ccf0 | 761 | curleft += obj.offsetLeft; |
5e60386d DV |
762 | if(!obj.offsetParent) |
763 | break; | |
3df0ccf0 DV |
764 | obj = obj.offsetParent; |
765 | } | |
5e60386d | 766 | else if(obj.x) |
3df0ccf0 DV |
767 | curleft += obj.x; |
768 | return curleft; | |
769 | }; | |
c21d2c2d | 770 | |
3df0ccf0 DV |
771 | Dygraph.findPosY = function(obj) { |
772 | var curtop = 0; | |
5e60386d DV |
773 | if(obj.offsetParent) |
774 | while(1) | |
775 | { | |
3df0ccf0 | 776 | curtop += obj.offsetTop; |
5e60386d DV |
777 | if(!obj.offsetParent) |
778 | break; | |
3df0ccf0 DV |
779 | obj = obj.offsetParent; |
780 | } | |
5e60386d | 781 | else if(obj.y) |
3df0ccf0 DV |
782 | curtop += obj.y; |
783 | return curtop; | |
784 | }; | |
785 | ||
5e60386d | 786 | |
71a11a8e | 787 | |
6a1aa64f DV |
788 | /** |
789 | * Create the div that contains information on the selected point(s) | |
790 | * This goes in the top right of the canvas, unless an external div has already | |
791 | * been specified. | |
792 | * @private | |
793 | */ | |
fedbd797 | 794 | Dygraph.prototype.createStatusMessage_ = function() { |
795 | var userLabelsDiv = this.user_attrs_["labelsDiv"]; | |
796 | if (userLabelsDiv && null != userLabelsDiv | |
797 | && (typeof(userLabelsDiv) == "string" || userLabelsDiv instanceof String)) { | |
798 | this.user_attrs_["labelsDiv"] = document.getElementById(userLabelsDiv); | |
799 | } | |
285a6bda DV |
800 | if (!this.attr_("labelsDiv")) { |
801 | var divWidth = this.attr_('labelsDivWidth'); | |
b0c3b730 | 802 | var messagestyle = { |
6a1aa64f DV |
803 | "position": "absolute", |
804 | "fontSize": "14px", | |
805 | "zIndex": 10, | |
806 | "width": divWidth + "px", | |
807 | "top": "0px", | |
8846615a | 808 | "left": (this.width_ - divWidth - 2) + "px", |
6a1aa64f DV |
809 | "background": "white", |
810 | "textAlign": "left", | |
b0c3b730 | 811 | "overflow": "hidden"}; |
fc80a396 | 812 | Dygraph.update(messagestyle, this.attr_('labelsDivStyles')); |
b0c3b730 DV |
813 | var div = document.createElement("div"); |
814 | for (var name in messagestyle) { | |
85b99f0b DV |
815 | if (messagestyle.hasOwnProperty(name)) { |
816 | div.style[name] = messagestyle[name]; | |
817 | } | |
b0c3b730 DV |
818 | } |
819 | this.graphDiv.appendChild(div); | |
285a6bda | 820 | this.attrs_.labelsDiv = div; |
6a1aa64f DV |
821 | } |
822 | }; | |
823 | ||
824 | /** | |
0abfbd7e DV |
825 | * Position the labels div so that its right edge is flush with the right edge |
826 | * of the charting area. | |
827 | */ | |
828 | Dygraph.prototype.positionLabelsDiv_ = function() { | |
829 | // Don't touch a user-specified labelsDiv. | |
830 | if (this.user_attrs_.hasOwnProperty("labelsDiv")) return; | |
831 | ||
832 | var area = this.plotter_.area; | |
833 | var div = this.attr_("labelsDiv"); | |
8c21adcf | 834 | div.style.left = area.x + area.w - this.attr_("labelsDivWidth") - 1 + "px"; |
0abfbd7e DV |
835 | }; |
836 | ||
837 | /** | |
6a1aa64f | 838 | * Create the text box to adjust the averaging period |
6a1aa64f DV |
839 | * @private |
840 | */ | |
285a6bda | 841 | Dygraph.prototype.createRollInterface_ = function() { |
8c69de65 DV |
842 | // Create a roller if one doesn't exist already. |
843 | if (!this.roller_) { | |
844 | this.roller_ = document.createElement("input"); | |
845 | this.roller_.type = "text"; | |
846 | this.roller_.style.display = "none"; | |
847 | this.graphDiv.appendChild(this.roller_); | |
848 | } | |
849 | ||
850 | var display = this.attr_('showRoller') ? 'block' : 'none'; | |
26ca7938 | 851 | |
b0c3b730 DV |
852 | var textAttr = { "position": "absolute", |
853 | "zIndex": 10, | |
854 | "top": (this.plotter_.area.h - 25) + "px", | |
855 | "left": (this.plotter_.area.x + 1) + "px", | |
856 | "display": display | |
6a1aa64f | 857 | }; |
8c69de65 DV |
858 | this.roller_.size = "2"; |
859 | this.roller_.value = this.rollPeriod_; | |
b0c3b730 | 860 | for (var name in textAttr) { |
85b99f0b | 861 | if (textAttr.hasOwnProperty(name)) { |
8c69de65 | 862 | this.roller_.style[name] = textAttr[name]; |
85b99f0b | 863 | } |
b0c3b730 DV |
864 | } |
865 | ||
76171648 | 866 | var dygraph = this; |
8c69de65 | 867 | this.roller_.onchange = function() { dygraph.adjustRoll(dygraph.roller_.value); }; |
76171648 DV |
868 | }; |
869 | ||
870 | // These functions are taken from MochiKit.Signal | |
871 | Dygraph.pageX = function(e) { | |
872 | if (e.pageX) { | |
873 | return (!e.pageX || e.pageX < 0) ? 0 : e.pageX; | |
874 | } else { | |
875 | var de = document; | |
876 | var b = document.body; | |
877 | return e.clientX + | |
878 | (de.scrollLeft || b.scrollLeft) - | |
879 | (de.clientLeft || 0); | |
880 | } | |
881 | }; | |
882 | ||
883 | Dygraph.pageY = function(e) { | |
884 | if (e.pageY) { | |
885 | return (!e.pageY || e.pageY < 0) ? 0 : e.pageY; | |
886 | } else { | |
887 | var de = document; | |
888 | var b = document.body; | |
889 | return e.clientY + | |
890 | (de.scrollTop || b.scrollTop) - | |
891 | (de.clientTop || 0); | |
892 | } | |
893 | }; | |
6a1aa64f | 894 | |
ee672584 RK |
895 | Dygraph.prototype.dragGetX_ = function(e, context) { |
896 | return Dygraph.pageX(e) - context.px | |
897 | }; | |
6a1aa64f | 898 | |
ee672584 RK |
899 | Dygraph.prototype.dragGetY_ = function(e, context) { |
900 | return Dygraph.pageY(e) - context.py | |
901 | }; | |
e3489f4f | 902 | |
885c13e4 RK |
903 | // Called in response to an interaction model operation that |
904 | // should start the default panning behavior. | |
905 | // | |
906 | // It's used in the default callback for "mousedown" operations. | |
907 | // Custom interaction model builders can use it to provide the default | |
908 | // panning behavior. | |
909 | // | |
ee672584 | 910 | Dygraph.startPan = function(event, g, context) { |
ee672584 RK |
911 | context.isPanning = true; |
912 | var xRange = g.xAxisRange(); | |
913 | context.dateRange = xRange[1] - xRange[0]; | |
914 | ||
915 | // Record the range of each y-axis at the start of the drag. | |
916 | // If any axis has a valueRange or valueWindow, then we want a 2D pan. | |
917 | context.is2DPan = false; | |
918 | for (var i = 0; i < g.axes_.length; i++) { | |
919 | var axis = g.axes_[i]; | |
920 | var yRange = g.yAxisRange(i); | |
921 | axis.dragValueRange = yRange[1] - yRange[0]; | |
ff022deb | 922 | axis.draggingValue = g.toDataYCoord(context.dragStartY, i); |
ee672584 RK |
923 | if (axis.valueWindow || axis.valueRange) context.is2DPan = true; |
924 | } | |
925 | ||
926 | // TODO(konigsberg): Switch from all this math to toDataCoords? | |
927 | // Seems to work for the dragging value. | |
928 | context.draggingDate = (context.dragStartX / g.width_) * context.dateRange + xRange[0]; | |
929 | }; | |
930 | ||
885c13e4 RK |
931 | // Called in response to an interaction model operation that |
932 | // responds to an event that pans the view. | |
933 | // | |
934 | // It's used in the default callback for "mousemove" operations. | |
935 | // Custom interaction model builders can use it to provide the default | |
936 | // panning behavior. | |
937 | // | |
ee672584 RK |
938 | Dygraph.movePan = function(event, g, context) { |
939 | context.dragEndX = g.dragGetX_(event, context); | |
940 | context.dragEndY = g.dragGetY_(event, context); | |
e3489f4f | 941 | |
d58ae307 | 942 | // TODO(danvk): update this comment |
ee672584 RK |
943 | // Want to have it so that: |
944 | // 1. draggingDate appears at dragEndX, draggingValue appears at dragEndY. | |
945 | // 2. daterange = (dateWindow_[1] - dateWindow_[0]) is unaltered. | |
946 | // 3. draggingValue appears at dragEndY. | |
947 | // 4. valueRange is unaltered. | |
948 | ||
949 | var minDate = context.draggingDate - (context.dragEndX / g.width_) * context.dateRange; | |
950 | var maxDate = minDate + context.dateRange; | |
951 | g.dateWindow_ = [minDate, maxDate]; | |
952 | ||
953 | // y-axis scaling is automatic unless this is a full 2D pan. | |
954 | if (context.is2DPan) { | |
955 | // Adjust each axis appropriately. | |
d59b6f34 RK |
956 | // NOTE(konigsberg): I don't think this computation for y_frac is correct. |
957 | // I think it doesn't take into account the display of the x axis. | |
958 | // See, when I tested this with console.log(y_frac), and move the mouse | |
959 | // cursor to the botom, the largest y_frac was 0.94, and not 1.0. That | |
960 | // could also explain why panning tends to start with a small jumpy shift. | |
ee672584 | 961 | var y_frac = context.dragEndY / g.height_; |
d59b6f34 | 962 | |
ee672584 RK |
963 | for (var i = 0; i < g.axes_.length; i++) { |
964 | var axis = g.axes_[i]; | |
965 | var maxValue = axis.draggingValue + y_frac * axis.dragValueRange; | |
966 | var minValue = maxValue - axis.dragValueRange; | |
967 | axis.valueWindow = [ minValue, maxValue ]; | |
968 | } | |
969 | } | |
970 | ||
971 | g.drawGraph_(); | |
972 | } | |
973 | ||
885c13e4 RK |
974 | // Called in response to an interaction model operation that |
975 | // responds to an event that ends panning. | |
976 | // | |
977 | // It's used in the default callback for "mouseup" operations. | |
978 | // Custom interaction model builders can use it to provide the default | |
979 | // panning behavior. | |
980 | // | |
ee672584 RK |
981 | Dygraph.endPan = function(event, g, context) { |
982 | context.isPanning = false; | |
983 | context.is2DPan = false; | |
984 | context.draggingDate = null; | |
985 | context.dateRange = null; | |
986 | context.valueRange = null; | |
987 | } | |
988 | ||
885c13e4 RK |
989 | // Called in response to an interaction model operation that |
990 | // responds to an event that starts zooming. | |
991 | // | |
992 | // It's used in the default callback for "mousedown" operations. | |
993 | // Custom interaction model builders can use it to provide the default | |
994 | // zooming behavior. | |
995 | // | |
ee672584 RK |
996 | Dygraph.startZoom = function(event, g, context) { |
997 | context.isZooming = true; | |
998 | } | |
999 | ||
885c13e4 RK |
1000 | // Called in response to an interaction model operation that |
1001 | // responds to an event that defines zoom boundaries. | |
1002 | // | |
1003 | // It's used in the default callback for "mousemove" operations. | |
1004 | // Custom interaction model builders can use it to provide the default | |
1005 | // zooming behavior. | |
1006 | // | |
ee672584 RK |
1007 | Dygraph.moveZoom = function(event, g, context) { |
1008 | context.dragEndX = g.dragGetX_(event, context); | |
1009 | context.dragEndY = g.dragGetY_(event, context); | |
1010 | ||
1011 | var xDelta = Math.abs(context.dragStartX - context.dragEndX); | |
1012 | var yDelta = Math.abs(context.dragStartY - context.dragEndY); | |
1013 | ||
1014 | // drag direction threshold for y axis is twice as large as x axis | |
1015 | context.dragDirection = (xDelta < yDelta / 2) ? Dygraph.VERTICAL : Dygraph.HORIZONTAL; | |
1016 | ||
1017 | g.drawZoomRect_( | |
1018 | context.dragDirection, | |
1019 | context.dragStartX, | |
1020 | context.dragEndX, | |
1021 | context.dragStartY, | |
1022 | context.dragEndY, | |
1023 | context.prevDragDirection, | |
1024 | context.prevEndX, | |
1025 | context.prevEndY); | |
1026 | ||
1027 | context.prevEndX = context.dragEndX; | |
1028 | context.prevEndY = context.dragEndY; | |
1029 | context.prevDragDirection = context.dragDirection; | |
1030 | } | |
1031 | ||
885c13e4 RK |
1032 | // Called in response to an interaction model operation that |
1033 | // responds to an event that performs a zoom based on previously defined | |
1034 | // bounds.. | |
1035 | // | |
1036 | // It's used in the default callback for "mouseup" operations. | |
1037 | // Custom interaction model builders can use it to provide the default | |
1038 | // zooming behavior. | |
1039 | // | |
ee672584 RK |
1040 | Dygraph.endZoom = function(event, g, context) { |
1041 | context.isZooming = false; | |
1042 | context.dragEndX = g.dragGetX_(event, context); | |
1043 | context.dragEndY = g.dragGetY_(event, context); | |
1044 | var regionWidth = Math.abs(context.dragEndX - context.dragStartX); | |
1045 | var regionHeight = Math.abs(context.dragEndY - context.dragStartY); | |
1046 | ||
1047 | if (regionWidth < 2 && regionHeight < 2 && | |
1048 | g.lastx_ != undefined && g.lastx_ != -1) { | |
1049 | // TODO(danvk): pass along more info about the points, e.g. 'x' | |
1050 | if (g.attr_('clickCallback') != null) { | |
1051 | g.attr_('clickCallback')(event, g.lastx_, g.selPoints_); | |
1052 | } | |
1053 | if (g.attr_('pointClickCallback')) { | |
1054 | // check if the click was on a particular point. | |
1055 | var closestIdx = -1; | |
1056 | var closestDistance = 0; | |
1057 | for (var i = 0; i < g.selPoints_.length; i++) { | |
1058 | var p = g.selPoints_[i]; | |
1059 | var distance = Math.pow(p.canvasx - context.dragEndX, 2) + | |
1060 | Math.pow(p.canvasy - context.dragEndY, 2); | |
1061 | if (closestIdx == -1 || distance < closestDistance) { | |
1062 | closestDistance = distance; | |
1063 | closestIdx = i; | |
d58ae307 | 1064 | } |
74f09e22 | 1065 | } |
bce01b0f | 1066 | |
ee672584 RK |
1067 | // Allow any click within two pixels of the dot. |
1068 | var radius = g.attr_('highlightCircleSize') + 2; | |
1069 | if (closestDistance <= 5 * 5) { | |
1070 | g.attr_('pointClickCallback')(event, g.selPoints_[closestIdx]); | |
1071 | } | |
6a1aa64f | 1072 | } |
ee672584 | 1073 | } |
6a1aa64f | 1074 | |
ee672584 RK |
1075 | if (regionWidth >= 10 && context.dragDirection == Dygraph.HORIZONTAL) { |
1076 | g.doZoomX_(Math.min(context.dragStartX, context.dragEndX), | |
1077 | Math.max(context.dragStartX, context.dragEndX)); | |
1078 | } else if (regionHeight >= 10 && context.dragDirection == Dygraph.VERTICAL) { | |
1079 | g.doZoomY_(Math.min(context.dragStartY, context.dragEndY), | |
1080 | Math.max(context.dragStartY, context.dragEndY)); | |
1081 | } else { | |
1082 | g.canvas_.getContext("2d").clearRect(0, 0, | |
1083 | g.canvas_.width, | |
1084 | g.canvas_.height); | |
1085 | } | |
1086 | context.dragStartX = null; | |
1087 | context.dragStartY = null; | |
1088 | } | |
79b3ee42 | 1089 | |
0a52ab7a RK |
1090 | Dygraph.defaultInteractionModel = { |
1091 | // Track the beginning of drag events | |
4f0c5aa0 DV |
1092 | mousedown: function(event, g, context) { |
1093 | context.initializeMouseDown(event, g, context); | |
0a52ab7a | 1094 | |
4f0c5aa0 DV |
1095 | if (event.altKey || event.shiftKey) { |
1096 | Dygraph.startPan(event, g, context); | |
1097 | } else { | |
1098 | Dygraph.startZoom(event, g, context); | |
1099 | } | |
1100 | }, | |
0a52ab7a RK |
1101 | |
1102 | // Draw zoom rectangles when the mouse is down and the user moves around | |
4f0c5aa0 DV |
1103 | mousemove: function(event, g, context) { |
1104 | if (context.isZooming) { | |
1105 | Dygraph.moveZoom(event, g, context); | |
1106 | } else if (context.isPanning) { | |
1107 | Dygraph.movePan(event, g, context); | |
1108 | } | |
1109 | }, | |
0a52ab7a | 1110 | |
4f0c5aa0 DV |
1111 | mouseup: function(event, g, context) { |
1112 | if (context.isZooming) { | |
1113 | Dygraph.endZoom(event, g, context); | |
1114 | } else if (context.isPanning) { | |
1115 | Dygraph.endPan(event, g, context); | |
1116 | } | |
1117 | }, | |
0a52ab7a RK |
1118 | |
1119 | // Temporarily cancel the dragging event when the mouse leaves the graph | |
4f0c5aa0 DV |
1120 | mouseout: function(event, g, context) { |
1121 | if (context.isZooming) { | |
1122 | context.dragEndX = null; | |
1123 | context.dragEndY = null; | |
1124 | } | |
1125 | }, | |
0a52ab7a RK |
1126 | |
1127 | // Disable zooming out if panning. | |
4f0c5aa0 DV |
1128 | dblclick: function(event, g, context) { |
1129 | if (event.altKey || event.shiftKey) { | |
1130 | return; | |
0a52ab7a | 1131 | } |
4f0c5aa0 DV |
1132 | // TODO(konigsberg): replace g.doUnzoom()_ with something that is |
1133 | // friendlier to public use. | |
1134 | g.doUnzoom_(); | |
1135 | } | |
0a52ab7a RK |
1136 | }; |
1137 | ||
1138 | Dygraph.DEFAULT_ATTRS.interactionModel = Dygraph.defaultInteractionModel; | |
ee672584 RK |
1139 | |
1140 | /** | |
1141 | * Set up all the mouse handlers needed to capture dragging behavior for zoom | |
1142 | * events. | |
1143 | * @private | |
1144 | */ | |
1145 | Dygraph.prototype.createDragInterface_ = function() { | |
1146 | var context = { | |
1147 | // Tracks whether the mouse is down right now | |
4f0c5aa0 DV |
1148 | isZooming: false, |
1149 | isPanning: false, // is this drag part of a pan? | |
1150 | is2DPan: false, // if so, is that pan 1- or 2-dimensional? | |
1151 | dragStartX: null, | |
1152 | dragStartY: null, | |
1153 | dragEndX: null, | |
1154 | dragEndY: null, | |
1155 | dragDirection: null, | |
1156 | prevEndX: null, | |
1157 | prevEndY: null, | |
1158 | prevDragDirection: null, | |
ee672584 RK |
1159 | |
1160 | // TODO(danvk): update this comment | |
1161 | // draggingDate and draggingValue represent the [date,value] point on the | |
1162 | // graph at which the mouse was pressed. As the mouse moves while panning, | |
1163 | // the viewport must pan so that the mouse position points to | |
1164 | // [draggingDate, draggingValue] | |
4f0c5aa0 | 1165 | draggingDate: null, |
ee672584 RK |
1166 | |
1167 | // TODO(danvk): update this comment | |
1168 | // The range in second/value units that the viewport encompasses during a | |
1169 | // panning operation. | |
4f0c5aa0 | 1170 | dateRange: null, |
ee672584 RK |
1171 | |
1172 | // Utility function to convert page-wide coordinates to canvas coords | |
4f0c5aa0 DV |
1173 | px: 0, |
1174 | py: 0, | |
ee672584 | 1175 | |
4f0c5aa0 | 1176 | initializeMouseDown: function(event, g, context) { |
885c13e4 | 1177 | // prevents mouse drags from selecting page text. |
ee672584 RK |
1178 | if (event.preventDefault) { |
1179 | event.preventDefault(); // Firefox, Chrome, etc. | |
1180 | } else { | |
1181 | event.returnValue = false; // IE | |
4f0c5aa0 | 1182 | event.cancelBubble = true; |
ee672584 | 1183 | } |
4f0c5aa0 | 1184 | |
ee672584 RK |
1185 | context.px = Dygraph.findPosX(g.canvas_); |
1186 | context.py = Dygraph.findPosY(g.canvas_); | |
1187 | context.dragStartX = g.dragGetX_(event, context); | |
1188 | context.dragStartY = g.dragGetY_(event, context); | |
bce01b0f | 1189 | } |
ee672584 RK |
1190 | }; |
1191 | ||
885c13e4 RK |
1192 | var interactionModel = this.attr_("interactionModel"); |
1193 | ||
2b188b3d RK |
1194 | // Self is the graph. |
1195 | var self = this; | |
1196 | ||
1197 | // Function that binds the graph and context to the handler. | |
1198 | var bindHandler = function(handler) { | |
ee672584 | 1199 | return function(event) { |
2b188b3d | 1200 | handler(event, self, context); |
ee672584 RK |
1201 | }; |
1202 | }; | |
1203 | ||
885c13e4 RK |
1204 | for (var eventName in interactionModel) { |
1205 | if (!interactionModel.hasOwnProperty(eventName)) continue; | |
ee672584 | 1206 | Dygraph.addEvent(this.mouseEventElement_, eventName, |
2b188b3d | 1207 | bindHandler(interactionModel[eventName])); |
ee672584 RK |
1208 | } |
1209 | ||
6a1aa64f DV |
1210 | // If the user releases the mouse button during a drag, but not over the |
1211 | // canvas, then it doesn't count as a zooming action. | |
76171648 | 1212 | Dygraph.addEvent(document, 'mouseup', function(event) { |
ee672584 RK |
1213 | if (context.isZooming || context.isPanning) { |
1214 | context.isZooming = false; | |
1215 | context.dragStartX = null; | |
1216 | context.dragStartY = null; | |
6a1aa64f | 1217 | } |
bce01b0f | 1218 | |
ee672584 RK |
1219 | if (context.isPanning) { |
1220 | context.isPanning = false; | |
1221 | context.draggingDate = null; | |
1222 | context.dateRange = null; | |
d58ae307 | 1223 | for (var i = 0; i < self.axes_.length; i++) { |
d63e6799 DV |
1224 | delete self.axes_[i].draggingValue; |
1225 | delete self.axes_[i].dragValueRange; | |
d58ae307 | 1226 | } |
bce01b0f | 1227 | } |
6a1aa64f | 1228 | }); |
6a1aa64f DV |
1229 | }; |
1230 | ||
1231 | /** | |
1232 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
1233 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
885c13e4 | 1234 | * avoid extra redrawing, but it's tricky to avoid interactions with the status |
6a1aa64f | 1235 | * dots. |
8b83c6cc | 1236 | * |
39b0e098 RK |
1237 | * @param {Number} direction the direction of the zoom rectangle. Acceptable |
1238 | * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL. | |
6a1aa64f DV |
1239 | * @param {Number} startX The X position where the drag started, in canvas |
1240 | * coordinates. | |
1241 | * @param {Number} endX The current X position of the drag, in canvas coords. | |
8b83c6cc RK |
1242 | * @param {Number} startY The Y position where the drag started, in canvas |
1243 | * coordinates. | |
1244 | * @param {Number} endY The current Y position of the drag, in canvas coords. | |
39b0e098 | 1245 | * @param {Number} prevDirection the value of direction on the previous call to |
8b83c6cc | 1246 | * this function. Used to avoid excess redrawing |
6a1aa64f DV |
1247 | * @param {Number} prevEndX The value of endX on the previous call to this |
1248 | * function. Used to avoid excess redrawing | |
8b83c6cc RK |
1249 | * @param {Number} prevEndY The value of endY on the previous call to this |
1250 | * function. Used to avoid excess redrawing | |
6a1aa64f DV |
1251 | * @private |
1252 | */ | |
8b83c6cc RK |
1253 | Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY, endY, |
1254 | prevDirection, prevEndX, prevEndY) { | |
6a1aa64f DV |
1255 | var ctx = this.canvas_.getContext("2d"); |
1256 | ||
1257 | // Clean up from the previous rect if necessary | |
39b0e098 | 1258 | if (prevDirection == Dygraph.HORIZONTAL) { |
6a1aa64f DV |
1259 | ctx.clearRect(Math.min(startX, prevEndX), 0, |
1260 | Math.abs(startX - prevEndX), this.height_); | |
39b0e098 | 1261 | } else if (prevDirection == Dygraph.VERTICAL){ |
8b83c6cc RK |
1262 | ctx.clearRect(0, Math.min(startY, prevEndY), |
1263 | this.width_, Math.abs(startY - prevEndY)); | |
6a1aa64f DV |
1264 | } |
1265 | ||
1266 | // Draw a light-grey rectangle to show the new viewing area | |
39b0e098 | 1267 | if (direction == Dygraph.HORIZONTAL) { |
8b83c6cc RK |
1268 | if (endX && startX) { |
1269 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
1270 | ctx.fillRect(Math.min(startX, endX), 0, | |
1271 | Math.abs(endX - startX), this.height_); | |
1272 | } | |
1273 | } | |
39b0e098 | 1274 | if (direction == Dygraph.VERTICAL) { |
8b83c6cc RK |
1275 | if (endY && startY) { |
1276 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
1277 | ctx.fillRect(0, Math.min(startY, endY), | |
1278 | this.width_, Math.abs(endY - startY)); | |
1279 | } | |
6a1aa64f DV |
1280 | } |
1281 | }; | |
1282 | ||
1283 | /** | |
8b83c6cc RK |
1284 | * Zoom to something containing [lowX, highX]. These are pixel coordinates in |
1285 | * the canvas. The exact zoom window may be slightly larger if there are no data | |
1286 | * points near lowX or highX. Don't confuse this function with doZoomXDates, | |
1287 | * which accepts dates that match the raw data. This function redraws the graph. | |
d58ae307 | 1288 | * |
6a1aa64f DV |
1289 | * @param {Number} lowX The leftmost pixel value that should be visible. |
1290 | * @param {Number} highX The rightmost pixel value that should be visible. | |
1291 | * @private | |
1292 | */ | |
8b83c6cc | 1293 | Dygraph.prototype.doZoomX_ = function(lowX, highX) { |
6a1aa64f | 1294 | // Find the earliest and latest dates contained in this canvasx range. |
8b83c6cc | 1295 | // Convert the call to date ranges of the raw data. |
ff022deb RK |
1296 | var minDate = this.toDataXCoord(lowX); |
1297 | var maxDate = this.toDataXCoord(highX); | |
8b83c6cc RK |
1298 | this.doZoomXDates_(minDate, maxDate); |
1299 | }; | |
6a1aa64f | 1300 | |
8b83c6cc RK |
1301 | /** |
1302 | * Zoom to something containing [minDate, maxDate] values. Don't confuse this | |
1303 | * method with doZoomX which accepts pixel coordinates. This function redraws | |
1304 | * the graph. | |
d58ae307 | 1305 | * |
8b83c6cc RK |
1306 | * @param {Number} minDate The minimum date that should be visible. |
1307 | * @param {Number} maxDate The maximum date that should be visible. | |
1308 | * @private | |
1309 | */ | |
1310 | Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) { | |
6a1aa64f | 1311 | this.dateWindow_ = [minDate, maxDate]; |
26ca7938 | 1312 | this.drawGraph_(); |
285a6bda | 1313 | if (this.attr_("zoomCallback")) { |
dea5c743 | 1314 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); |
8b83c6cc RK |
1315 | } |
1316 | }; | |
1317 | ||
1318 | /** | |
1319 | * Zoom to something containing [lowY, highY]. These are pixel coordinates in | |
d58ae307 DV |
1320 | * the canvas. This function redraws the graph. |
1321 | * | |
8b83c6cc RK |
1322 | * @param {Number} lowY The topmost pixel value that should be visible. |
1323 | * @param {Number} highY The lowest pixel value that should be visible. | |
1324 | * @private | |
1325 | */ | |
1326 | Dygraph.prototype.doZoomY_ = function(lowY, highY) { | |
d58ae307 DV |
1327 | // Find the highest and lowest values in pixel range for each axis. |
1328 | // Note that lowY (in pixels) corresponds to the max Value (in data coords). | |
1329 | // This is because pixels increase as you go down on the screen, whereas data | |
1330 | // coordinates increase as you go up the screen. | |
1331 | var valueRanges = []; | |
1332 | for (var i = 0; i < this.axes_.length; i++) { | |
ff022deb RK |
1333 | var hi = this.toDataYCoord(lowY, i); |
1334 | var low = this.toDataYCoord(highY, i); | |
1335 | this.axes_[i].valueWindow = [low, hi]; | |
1336 | valueRanges.push([low, hi]); | |
d58ae307 | 1337 | } |
8b83c6cc | 1338 | |
66c380c4 | 1339 | this.drawGraph_(); |
8b83c6cc | 1340 | if (this.attr_("zoomCallback")) { |
d58ae307 DV |
1341 | var xRange = this.xAxisRange(); |
1342 | this.attr_("zoomCallback")(xRange[0], xRange[1], this.yAxisRanges()); | |
8b83c6cc RK |
1343 | } |
1344 | }; | |
1345 | ||
1346 | /** | |
1347 | * Reset the zoom to the original view coordinates. This is the same as | |
1348 | * double-clicking on the graph. | |
d58ae307 | 1349 | * |
8b83c6cc RK |
1350 | * @private |
1351 | */ | |
1352 | Dygraph.prototype.doUnzoom_ = function() { | |
d58ae307 | 1353 | var dirty = false; |
8b83c6cc | 1354 | if (this.dateWindow_ != null) { |
d58ae307 | 1355 | dirty = true; |
8b83c6cc RK |
1356 | this.dateWindow_ = null; |
1357 | } | |
d58ae307 DV |
1358 | |
1359 | for (var i = 0; i < this.axes_.length; i++) { | |
1360 | if (this.axes_[i].valueWindow != null) { | |
1361 | dirty = true; | |
1362 | delete this.axes_[i].valueWindow; | |
1363 | } | |
8b83c6cc RK |
1364 | } |
1365 | ||
1366 | if (dirty) { | |
437c0979 RK |
1367 | // Putting the drawing operation before the callback because it resets |
1368 | // yAxisRange. | |
66c380c4 | 1369 | this.drawGraph_(); |
8b83c6cc RK |
1370 | if (this.attr_("zoomCallback")) { |
1371 | var minDate = this.rawData_[0][0]; | |
1372 | var maxDate = this.rawData_[this.rawData_.length - 1][0]; | |
d58ae307 | 1373 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); |
8b83c6cc | 1374 | } |
67e650dc | 1375 | } |
6a1aa64f DV |
1376 | }; |
1377 | ||
1378 | /** | |
1379 | * When the mouse moves in the canvas, display information about a nearby data | |
1380 | * point and draw dots over those points in the data series. This function | |
1381 | * takes care of cleanup of previously-drawn dots. | |
1382 | * @param {Object} event The mousemove event from the browser. | |
1383 | * @private | |
1384 | */ | |
285a6bda | 1385 | Dygraph.prototype.mouseMove_ = function(event) { |
eb7bf005 | 1386 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_); |
6a1aa64f DV |
1387 | var points = this.layout_.points; |
1388 | ||
1389 | var lastx = -1; | |
1390 | var lasty = -1; | |
1391 | ||
1392 | // Loop through all the points and find the date nearest to our current | |
1393 | // location. | |
1394 | var minDist = 1e+100; | |
1395 | var idx = -1; | |
1396 | for (var i = 0; i < points.length; i++) { | |
8a7cc60e RK |
1397 | var point = points[i]; |
1398 | if (point == null) continue; | |
ee672584 | 1399 | var dist = Math.abs(point.canvasx - canvasx); |
f032c51d | 1400 | if (dist > minDist) continue; |
6a1aa64f DV |
1401 | minDist = dist; |
1402 | idx = i; | |
1403 | } | |
1404 | if (idx >= 0) lastx = points[idx].xval; | |
1405 | // Check that you can really highlight the last day's data | |
8a7cc60e RK |
1406 | var last = points[points.length-1]; |
1407 | if (last != null && canvasx > last.canvasx) | |
6a1aa64f DV |
1408 | lastx = points[points.length-1].xval; |
1409 | ||
1410 | // Extract the points we've selected | |
b258a3da | 1411 | this.selPoints_ = []; |
50360fd0 | 1412 | var l = points.length; |
416b05ad NK |
1413 | if (!this.attr_("stackedGraph")) { |
1414 | for (var i = 0; i < l; i++) { | |
1415 | if (points[i].xval == lastx) { | |
1416 | this.selPoints_.push(points[i]); | |
1417 | } | |
1418 | } | |
1419 | } else { | |
354e15ab DE |
1420 | // Need to 'unstack' points starting from the bottom |
1421 | var cumulative_sum = 0; | |
416b05ad NK |
1422 | for (var i = l - 1; i >= 0; i--) { |
1423 | if (points[i].xval == lastx) { | |
354e15ab | 1424 | var p = {}; // Clone the point since we modify it |
d4139cd8 NK |
1425 | for (var k in points[i]) { |
1426 | p[k] = points[i][k]; | |
50360fd0 NK |
1427 | } |
1428 | p.yval -= cumulative_sum; | |
1429 | cumulative_sum += p.yval; | |
d4139cd8 | 1430 | this.selPoints_.push(p); |
12e4c741 | 1431 | } |
6a1aa64f | 1432 | } |
354e15ab | 1433 | this.selPoints_.reverse(); |
6a1aa64f DV |
1434 | } |
1435 | ||
b258a3da | 1436 | if (this.attr_("highlightCallback")) { |
a4c6a67c | 1437 | var px = this.lastx_; |
dd082dda | 1438 | if (px !== null && lastx != px) { |
344ba8c0 | 1439 | // only fire if the selected point has changed. |
2ddb1197 | 1440 | this.attr_("highlightCallback")(event, lastx, this.selPoints_, this.idxToRow_(idx)); |
43af96e7 | 1441 | } |
12e4c741 | 1442 | } |
43af96e7 | 1443 | |
239c712d NAG |
1444 | // Save last x position for callbacks. |
1445 | this.lastx_ = lastx; | |
50360fd0 | 1446 | |
239c712d NAG |
1447 | this.updateSelection_(); |
1448 | }; | |
b258a3da | 1449 | |
239c712d | 1450 | /** |
1903f1e4 | 1451 | * Transforms layout_.points index into data row number. |
2ddb1197 | 1452 | * @param int layout_.points index |
1903f1e4 | 1453 | * @return int row number, or -1 if none could be found. |
2ddb1197 SC |
1454 | * @private |
1455 | */ | |
1456 | Dygraph.prototype.idxToRow_ = function(idx) { | |
1903f1e4 | 1457 | if (idx < 0) return -1; |
2ddb1197 | 1458 | |
1903f1e4 DV |
1459 | for (var i in this.layout_.datasets) { |
1460 | if (idx < this.layout_.datasets[i].length) { | |
1461 | return this.boundaryIds_[0][0]+idx; | |
1462 | } | |
1463 | idx -= this.layout_.datasets[i].length; | |
1464 | } | |
1465 | return -1; | |
1466 | }; | |
2ddb1197 SC |
1467 | |
1468 | /** | |
239c712d NAG |
1469 | * Draw dots over the selectied points in the data series. This function |
1470 | * takes care of cleanup of previously-drawn dots. | |
1471 | * @private | |
1472 | */ | |
1473 | Dygraph.prototype.updateSelection_ = function() { | |
6a1aa64f | 1474 | // Clear the previously drawn vertical, if there is one |
6a1aa64f DV |
1475 | var ctx = this.canvas_.getContext("2d"); |
1476 | if (this.previousVerticalX_ >= 0) { | |
46dde5f9 DV |
1477 | // Determine the maximum highlight circle size. |
1478 | var maxCircleSize = 0; | |
227b93cc DV |
1479 | var labels = this.attr_('labels'); |
1480 | for (var i = 1; i < labels.length; i++) { | |
1481 | var r = this.attr_('highlightCircleSize', labels[i]); | |
46dde5f9 DV |
1482 | if (r > maxCircleSize) maxCircleSize = r; |
1483 | } | |
6a1aa64f | 1484 | var px = this.previousVerticalX_; |
46dde5f9 DV |
1485 | ctx.clearRect(px - maxCircleSize - 1, 0, |
1486 | 2 * maxCircleSize + 2, this.height_); | |
6a1aa64f DV |
1487 | } |
1488 | ||
584ceeaa DV |
1489 | var isOK = function(x) { return x && !isNaN(x); }; |
1490 | ||
d160cc3b | 1491 | if (this.selPoints_.length > 0) { |
b258a3da | 1492 | var canvasx = this.selPoints_[0].canvasx; |
6a1aa64f DV |
1493 | |
1494 | // Set the status message to indicate the selected point(s) | |
239c712d | 1495 | var replace = this.attr_('xValueFormatter')(this.lastx_, this) + ":"; |
50360fd0 | 1496 | var fmtFunc = this.attr_('yValueFormatter'); |
6a1aa64f | 1497 | var clen = this.colors_.length; |
d160cc3b NK |
1498 | |
1499 | if (this.attr_('showLabelsOnHighlight')) { | |
1500 | // Set the status message to indicate the selected point(s) | |
d160cc3b | 1501 | for (var i = 0; i < this.selPoints_.length; i++) { |
129569a5 | 1502 | if (!this.attr_("labelsShowZeroValues") && this.selPoints_[i].yval == 0) continue; |
d160cc3b NK |
1503 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
1504 | if (this.attr_("labelsSeparateLines")) { | |
1505 | replace += "<br/>"; | |
1506 | } | |
1507 | var point = this.selPoints_[i]; | |
8fb6dc24 | 1508 | var c = new RGBColor(this.plotter_.colors[point.name]); |
029da4b6 | 1509 | var yval = fmtFunc(point.yval); |
d160cc3b NK |
1510 | replace += " <b><font color='" + c.toHex() + "'>" |
1511 | + point.name + "</font></b>:" | |
1512 | + yval; | |
6a1aa64f | 1513 | } |
50360fd0 | 1514 | |
d160cc3b | 1515 | this.attr_("labelsDiv").innerHTML = replace; |
6a1aa64f | 1516 | } |
6a1aa64f | 1517 | |
6a1aa64f | 1518 | // Draw colored circles over the center of each selected point |
43af96e7 | 1519 | ctx.save(); |
b258a3da | 1520 | for (var i = 0; i < this.selPoints_.length; i++) { |
f032c51d | 1521 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
227b93cc DV |
1522 | var circleSize = |
1523 | this.attr_('highlightCircleSize', this.selPoints_[i].name); | |
6a1aa64f | 1524 | ctx.beginPath(); |
563c70ca | 1525 | ctx.fillStyle = this.plotter_.colors[this.selPoints_[i].name]; |
f032c51d | 1526 | ctx.arc(canvasx, this.selPoints_[i].canvasy, circleSize, |
7bf6a9fe | 1527 | 0, 2 * Math.PI, false); |
6a1aa64f DV |
1528 | ctx.fill(); |
1529 | } | |
1530 | ctx.restore(); | |
1531 | ||
1532 | this.previousVerticalX_ = canvasx; | |
1533 | } | |
1534 | }; | |
1535 | ||
1536 | /** | |
239c712d NAG |
1537 | * Set manually set selected dots, and display information about them |
1538 | * @param int row number that should by highlighted | |
1539 | * false value clears the selection | |
1540 | * @public | |
1541 | */ | |
1542 | Dygraph.prototype.setSelection = function(row) { | |
1543 | // Extract the points we've selected | |
1544 | this.selPoints_ = []; | |
1545 | var pos = 0; | |
50360fd0 | 1546 | |
239c712d | 1547 | if (row !== false) { |
16269f6e NAG |
1548 | row = row-this.boundaryIds_[0][0]; |
1549 | } | |
50360fd0 | 1550 | |
16269f6e | 1551 | if (row !== false && row >= 0) { |
239c712d | 1552 | for (var i in this.layout_.datasets) { |
16269f6e | 1553 | if (row < this.layout_.datasets[i].length) { |
38f33a44 | 1554 | var point = this.layout_.points[pos+row]; |
1555 | ||
1556 | if (this.attr_("stackedGraph")) { | |
8c03ba63 | 1557 | point = this.layout_.unstackPointAtIndex(pos+row); |
38f33a44 | 1558 | } |
1559 | ||
1560 | this.selPoints_.push(point); | |
16269f6e | 1561 | } |
239c712d NAG |
1562 | pos += this.layout_.datasets[i].length; |
1563 | } | |
16269f6e | 1564 | } |
50360fd0 | 1565 | |
16269f6e | 1566 | if (this.selPoints_.length) { |
239c712d NAG |
1567 | this.lastx_ = this.selPoints_[0].xval; |
1568 | this.updateSelection_(); | |
1569 | } else { | |
1570 | this.lastx_ = -1; | |
1571 | this.clearSelection(); | |
1572 | } | |
1573 | ||
1574 | }; | |
1575 | ||
1576 | /** | |
6a1aa64f DV |
1577 | * The mouse has left the canvas. Clear out whatever artifacts remain |
1578 | * @param {Object} event the mouseout event from the browser. | |
1579 | * @private | |
1580 | */ | |
285a6bda | 1581 | Dygraph.prototype.mouseOut_ = function(event) { |
a4c6a67c AV |
1582 | if (this.attr_("unhighlightCallback")) { |
1583 | this.attr_("unhighlightCallback")(event); | |
1584 | } | |
1585 | ||
43af96e7 | 1586 | if (this.attr_("hideOverlayOnMouseOut")) { |
239c712d | 1587 | this.clearSelection(); |
43af96e7 | 1588 | } |
6a1aa64f DV |
1589 | }; |
1590 | ||
239c712d NAG |
1591 | /** |
1592 | * Remove all selection from the canvas | |
1593 | * @public | |
1594 | */ | |
1595 | Dygraph.prototype.clearSelection = function() { | |
1596 | // Get rid of the overlay data | |
1597 | var ctx = this.canvas_.getContext("2d"); | |
1598 | ctx.clearRect(0, 0, this.width_, this.height_); | |
1599 | this.attr_("labelsDiv").innerHTML = ""; | |
1600 | this.selPoints_ = []; | |
1601 | this.lastx_ = -1; | |
1602 | } | |
1603 | ||
103b7292 NAG |
1604 | /** |
1605 | * Returns the number of the currently selected row | |
1606 | * @return int row number, of -1 if nothing is selected | |
1607 | * @public | |
1608 | */ | |
1609 | Dygraph.prototype.getSelection = function() { | |
1610 | if (!this.selPoints_ || this.selPoints_.length < 1) { | |
1611 | return -1; | |
1612 | } | |
50360fd0 | 1613 | |
103b7292 NAG |
1614 | for (var row=0; row<this.layout_.points.length; row++ ) { |
1615 | if (this.layout_.points[row].x == this.selPoints_[0].x) { | |
16269f6e | 1616 | return row + this.boundaryIds_[0][0]; |
103b7292 NAG |
1617 | } |
1618 | } | |
1619 | return -1; | |
1620 | } | |
1621 | ||
285a6bda | 1622 | Dygraph.zeropad = function(x) { |
32988383 DV |
1623 | if (x < 10) return "0" + x; else return "" + x; |
1624 | } | |
1625 | ||
6a1aa64f | 1626 | /** |
6b8e33dd DV |
1627 | * Return a string version of the hours, minutes and seconds portion of a date. |
1628 | * @param {Number} date The JavaScript date (ms since epoch) | |
1629 | * @return {String} A time of the form "HH:MM:SS" | |
1630 | * @private | |
1631 | */ | |
bf640e56 | 1632 | Dygraph.hmsString_ = function(date) { |
285a6bda | 1633 | var zeropad = Dygraph.zeropad; |
6b8e33dd DV |
1634 | var d = new Date(date); |
1635 | if (d.getSeconds()) { | |
1636 | return zeropad(d.getHours()) + ":" + | |
1637 | zeropad(d.getMinutes()) + ":" + | |
1638 | zeropad(d.getSeconds()); | |
6b8e33dd | 1639 | } else { |
054531ca | 1640 | return zeropad(d.getHours()) + ":" + zeropad(d.getMinutes()); |
6b8e33dd DV |
1641 | } |
1642 | } | |
1643 | ||
1644 | /** | |
bf640e56 AV |
1645 | * Convert a JS date to a string appropriate to display on an axis that |
1646 | * is displaying values at the stated granularity. | |
1647 | * @param {Date} date The date to format | |
1648 | * @param {Number} granularity One of the Dygraph granularity constants | |
1649 | * @return {String} The formatted date | |
1650 | * @private | |
1651 | */ | |
1652 | Dygraph.dateAxisFormatter = function(date, granularity) { | |
5f70132f DV |
1653 | if (granularity >= Dygraph.DECADAL) { |
1654 | return date.strftime('%Y'); | |
1655 | } else if (granularity >= Dygraph.MONTHLY) { | |
bf640e56 AV |
1656 | return date.strftime('%b %y'); |
1657 | } else { | |
31eddad3 | 1658 | var frac = date.getHours() * 3600 + date.getMinutes() * 60 + date.getSeconds() + date.getMilliseconds(); |
bf640e56 AV |
1659 | if (frac == 0 || granularity >= Dygraph.DAILY) { |
1660 | return new Date(date.getTime() + 3600*1000).strftime('%d%b'); | |
1661 | } else { | |
1662 | return Dygraph.hmsString_(date.getTime()); | |
1663 | } | |
1664 | } | |
1665 | } | |
1666 | ||
1667 | /** | |
6a1aa64f DV |
1668 | * Convert a JS date (millis since epoch) to YYYY/MM/DD |
1669 | * @param {Number} date The JavaScript date (ms since epoch) | |
1670 | * @return {String} A date of the form "YYYY/MM/DD" | |
1671 | * @private | |
1672 | */ | |
285a6bda DV |
1673 | Dygraph.dateString_ = function(date, self) { |
1674 | var zeropad = Dygraph.zeropad; | |
6a1aa64f DV |
1675 | var d = new Date(date); |
1676 | ||
1677 | // Get the year: | |
1678 | var year = "" + d.getFullYear(); | |
1679 | // Get a 0 padded month string | |
6b8e33dd | 1680 | var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh |
6a1aa64f | 1681 | // Get a 0 padded day string |
6b8e33dd | 1682 | var day = zeropad(d.getDate()); |
6a1aa64f | 1683 | |
6b8e33dd DV |
1684 | var ret = ""; |
1685 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); | |
bf640e56 | 1686 | if (frac) ret = " " + Dygraph.hmsString_(date); |
6b8e33dd DV |
1687 | |
1688 | return year + "/" + month + "/" + day + ret; | |
6a1aa64f DV |
1689 | }; |
1690 | ||
1691 | /** | |
1692 | * Round a number to the specified number of digits past the decimal point. | |
1693 | * @param {Number} num The number to round | |
1694 | * @param {Number} places The number of decimals to which to round | |
1695 | * @return {Number} The rounded number | |
1696 | * @private | |
1697 | */ | |
029da4b6 | 1698 | Dygraph.round_ = function(num, places) { |
6a1aa64f DV |
1699 | var shift = Math.pow(10, places); |
1700 | return Math.round(num * shift)/shift; | |
1701 | }; | |
1702 | ||
1703 | /** | |
1704 | * Fires when there's data available to be graphed. | |
1705 | * @param {String} data Raw CSV data to be plotted | |
1706 | * @private | |
1707 | */ | |
285a6bda | 1708 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f | 1709 | this.rawData_ = this.parseCSV_(data); |
26ca7938 | 1710 | this.predraw_(); |
6a1aa64f DV |
1711 | }; |
1712 | ||
285a6bda | 1713 | Dygraph.prototype.months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", |
8846615a | 1714 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]; |
285a6bda | 1715 | Dygraph.prototype.quarters = ["Jan", "Apr", "Jul", "Oct"]; |
6a1aa64f DV |
1716 | |
1717 | /** | |
1718 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
1719 | * @private | |
1720 | */ | |
285a6bda | 1721 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f DV |
1722 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
1723 | var startDate, endDate; | |
1724 | if (this.dateWindow_) { | |
1725 | startDate = this.dateWindow_[0]; | |
1726 | endDate = this.dateWindow_[1]; | |
1727 | } else { | |
1728 | startDate = this.rawData_[0][0]; | |
1729 | endDate = this.rawData_[this.rawData_.length - 1][0]; | |
1730 | } | |
1731 | ||
285a6bda | 1732 | var xTicks = this.attr_('xTicker')(startDate, endDate, this); |
6a1aa64f | 1733 | this.layout_.updateOptions({xTicks: xTicks}); |
32988383 DV |
1734 | }; |
1735 | ||
1736 | // Time granularity enumeration | |
285a6bda | 1737 | Dygraph.SECONDLY = 0; |
20a41c17 DV |
1738 | Dygraph.TWO_SECONDLY = 1; |
1739 | Dygraph.FIVE_SECONDLY = 2; | |
1740 | Dygraph.TEN_SECONDLY = 3; | |
1741 | Dygraph.THIRTY_SECONDLY = 4; | |
1742 | Dygraph.MINUTELY = 5; | |
1743 | Dygraph.TWO_MINUTELY = 6; | |
1744 | Dygraph.FIVE_MINUTELY = 7; | |
1745 | Dygraph.TEN_MINUTELY = 8; | |
1746 | Dygraph.THIRTY_MINUTELY = 9; | |
1747 | Dygraph.HOURLY = 10; | |
1748 | Dygraph.TWO_HOURLY = 11; | |
1749 | Dygraph.SIX_HOURLY = 12; | |
1750 | Dygraph.DAILY = 13; | |
1751 | Dygraph.WEEKLY = 14; | |
1752 | Dygraph.MONTHLY = 15; | |
1753 | Dygraph.QUARTERLY = 16; | |
1754 | Dygraph.BIANNUAL = 17; | |
1755 | Dygraph.ANNUAL = 18; | |
1756 | Dygraph.DECADAL = 19; | |
3db4c464 | 1757 | Dygraph.CENTENNIAL = 20; |
5f70132f | 1758 | Dygraph.NUM_GRANULARITIES = 21; |
285a6bda DV |
1759 | |
1760 | Dygraph.SHORT_SPACINGS = []; | |
1761 | Dygraph.SHORT_SPACINGS[Dygraph.SECONDLY] = 1000 * 1; | |
20a41c17 DV |
1762 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_SECONDLY] = 1000 * 2; |
1763 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_SECONDLY] = 1000 * 5; | |
285a6bda DV |
1764 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_SECONDLY] = 1000 * 10; |
1765 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_SECONDLY] = 1000 * 30; | |
1766 | Dygraph.SHORT_SPACINGS[Dygraph.MINUTELY] = 1000 * 60; | |
20a41c17 DV |
1767 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_MINUTELY] = 1000 * 60 * 2; |
1768 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_MINUTELY] = 1000 * 60 * 5; | |
285a6bda DV |
1769 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_MINUTELY] = 1000 * 60 * 10; |
1770 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_MINUTELY] = 1000 * 60 * 30; | |
1771 | Dygraph.SHORT_SPACINGS[Dygraph.HOURLY] = 1000 * 3600; | |
20a41c17 | 1772 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_HOURLY] = 1000 * 3600 * 2; |
805d5519 | 1773 | Dygraph.SHORT_SPACINGS[Dygraph.SIX_HOURLY] = 1000 * 3600 * 6; |
285a6bda DV |
1774 | Dygraph.SHORT_SPACINGS[Dygraph.DAILY] = 1000 * 86400; |
1775 | Dygraph.SHORT_SPACINGS[Dygraph.WEEKLY] = 1000 * 604800; | |
32988383 DV |
1776 | |
1777 | // NumXTicks() | |
1778 | // | |
1779 | // If we used this time granularity, how many ticks would there be? | |
1780 | // This is only an approximation, but it's generally good enough. | |
1781 | // | |
285a6bda DV |
1782 | Dygraph.prototype.NumXTicks = function(start_time, end_time, granularity) { |
1783 | if (granularity < Dygraph.MONTHLY) { | |
32988383 | 1784 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1785 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
32988383 DV |
1786 | return Math.floor(0.5 + 1.0 * (end_time - start_time) / spacing); |
1787 | } else { | |
1788 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1789 | var num_months = 12; | |
285a6bda DV |
1790 | if (granularity == Dygraph.QUARTERLY) num_months = 3; |
1791 | if (granularity == Dygraph.BIANNUAL) num_months = 2; | |
1792 | if (granularity == Dygraph.ANNUAL) num_months = 1; | |
1793 | if (granularity == Dygraph.DECADAL) { num_months = 1; year_mod = 10; } | |
3db4c464 | 1794 | if (granularity == Dygraph.CENTENNIAL) { num_months = 1; year_mod = 100; } |
32988383 DV |
1795 | |
1796 | var msInYear = 365.2524 * 24 * 3600 * 1000; | |
1797 | var num_years = 1.0 * (end_time - start_time) / msInYear; | |
1798 | return Math.floor(0.5 + 1.0 * num_years * num_months / year_mod); | |
1799 | } | |
1800 | }; | |
1801 | ||
1802 | // GetXAxis() | |
1803 | // | |
1804 | // Construct an x-axis of nicely-formatted times on meaningful boundaries | |
1805 | // (e.g. 'Jan 09' rather than 'Jan 22, 2009'). | |
1806 | // | |
1807 | // Returns an array containing {v: millis, label: label} dictionaries. | |
1808 | // | |
285a6bda | 1809 | Dygraph.prototype.GetXAxis = function(start_time, end_time, granularity) { |
bf640e56 | 1810 | var formatter = this.attr_("xAxisLabelFormatter"); |
32988383 | 1811 | var ticks = []; |
285a6bda | 1812 | if (granularity < Dygraph.MONTHLY) { |
32988383 | 1813 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1814 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
3d29302c | 1815 | var format = '%d%b'; // e.g. "1Jan" |
076c9622 DV |
1816 | |
1817 | // Find a time less than start_time which occurs on a "nice" time boundary | |
1818 | // for this granularity. | |
1819 | var g = spacing / 1000; | |
076c9622 DV |
1820 | var d = new Date(start_time); |
1821 | if (g <= 60) { // seconds | |
1822 | var x = d.getSeconds(); d.setSeconds(x - x % g); | |
1823 | } else { | |
1824 | d.setSeconds(0); | |
1825 | g /= 60; | |
1826 | if (g <= 60) { // minutes | |
1827 | var x = d.getMinutes(); d.setMinutes(x - x % g); | |
1828 | } else { | |
1829 | d.setMinutes(0); | |
1830 | g /= 60; | |
1831 | ||
1832 | if (g <= 24) { // days | |
1833 | var x = d.getHours(); d.setHours(x - x % g); | |
1834 | } else { | |
1835 | d.setHours(0); | |
1836 | g /= 24; | |
1837 | ||
1838 | if (g == 7) { // one week | |
20a41c17 | 1839 | d.setDate(d.getDate() - d.getDay()); |
076c9622 DV |
1840 | } |
1841 | } | |
1842 | } | |
328bb812 | 1843 | } |
076c9622 DV |
1844 | start_time = d.getTime(); |
1845 | ||
32988383 | 1846 | for (var t = start_time; t <= end_time; t += spacing) { |
bf640e56 | 1847 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1848 | } |
1849 | } else { | |
1850 | // Display a tick mark on the first of a set of months of each year. | |
1851 | // Years get a tick mark iff y % year_mod == 0. This is useful for | |
1852 | // displaying a tick mark once every 10 years, say, on long time scales. | |
1853 | var months; | |
1854 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1855 | ||
285a6bda | 1856 | if (granularity == Dygraph.MONTHLY) { |
32988383 | 1857 | months = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ]; |
285a6bda | 1858 | } else if (granularity == Dygraph.QUARTERLY) { |
32988383 | 1859 | months = [ 0, 3, 6, 9 ]; |
285a6bda | 1860 | } else if (granularity == Dygraph.BIANNUAL) { |
32988383 | 1861 | months = [ 0, 6 ]; |
285a6bda | 1862 | } else if (granularity == Dygraph.ANNUAL) { |
32988383 | 1863 | months = [ 0 ]; |
285a6bda | 1864 | } else if (granularity == Dygraph.DECADAL) { |
32988383 DV |
1865 | months = [ 0 ]; |
1866 | year_mod = 10; | |
3db4c464 | 1867 | } else if (granularity == Dygraph.CENTENNIAL) { |
5f70132f DV |
1868 | months = [ 0 ]; |
1869 | year_mod = 100; | |
1870 | } else { | |
1871 | this.warn("Span of dates is too long"); | |
32988383 DV |
1872 | } |
1873 | ||
1874 | var start_year = new Date(start_time).getFullYear(); | |
1875 | var end_year = new Date(end_time).getFullYear(); | |
285a6bda | 1876 | var zeropad = Dygraph.zeropad; |
32988383 DV |
1877 | for (var i = start_year; i <= end_year; i++) { |
1878 | if (i % year_mod != 0) continue; | |
1879 | for (var j = 0; j < months.length; j++) { | |
1880 | var date_str = i + "/" + zeropad(1 + months[j]) + "/01"; | |
1881 | var t = Date.parse(date_str); | |
1882 | if (t < start_time || t > end_time) continue; | |
bf640e56 | 1883 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1884 | } |
1885 | } | |
1886 | } | |
1887 | ||
1888 | return ticks; | |
1889 | }; | |
1890 | ||
6a1aa64f DV |
1891 | |
1892 | /** | |
1893 | * Add ticks to the x-axis based on a date range. | |
1894 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1895 | * @param {Number} endDate End of the date window (millis since epoch) | |
1896 | * @return {Array.<Object>} Array of {label, value} tuples. | |
1897 | * @public | |
1898 | */ | |
285a6bda | 1899 | Dygraph.dateTicker = function(startDate, endDate, self) { |
32988383 | 1900 | var chosen = -1; |
285a6bda DV |
1901 | for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) { |
1902 | var num_ticks = self.NumXTicks(startDate, endDate, i); | |
1903 | if (self.width_ / num_ticks >= self.attr_('pixelsPerXLabel')) { | |
32988383 DV |
1904 | chosen = i; |
1905 | break; | |
2769de62 | 1906 | } |
6a1aa64f DV |
1907 | } |
1908 | ||
32988383 | 1909 | if (chosen >= 0) { |
285a6bda | 1910 | return self.GetXAxis(startDate, endDate, chosen); |
6a1aa64f | 1911 | } else { |
32988383 | 1912 | // TODO(danvk): signal error. |
6a1aa64f | 1913 | } |
6a1aa64f DV |
1914 | }; |
1915 | ||
6821efbe RK |
1916 | Dygraph.DEFAULT_PREFERRED_LOG_TICK_VALUES = function() { |
1917 | var vals = []; | |
1918 | for (var power = -39; power <= 39; power++) { | |
1919 | var range = Math.pow(10, power); | |
4b467120 RK |
1920 | for (var mult = 1; mult <= 9; mult++) { |
1921 | var val = range * mult; | |
6821efbe RK |
1922 | vals.push(val); |
1923 | } | |
1924 | } | |
1925 | return vals; | |
1926 | }(); | |
1927 | ||
6a1aa64f DV |
1928 | /** |
1929 | * Add ticks when the x axis has numbers on it (instead of dates) | |
ff022deb RK |
1930 | * TODO(konigsberg): Update comment. |
1931 | * | |
7d0e7a0d RK |
1932 | * @param {Number} minV minimum value |
1933 | * @param {Number} maxV maximum value | |
84fc6aa7 | 1934 | * @param self |
f30cf740 | 1935 | * @param {function} attribute accessor function. |
6a1aa64f DV |
1936 | * @return {Array.<Object>} Array of {label, value} tuples. |
1937 | * @public | |
1938 | */ | |
0d64e596 | 1939 | Dygraph.numericTicks = function(minV, maxV, self, axis_props, vals) { |
70c80071 DV |
1940 | var attr = function(k) { |
1941 | if (axis_props && axis_props.hasOwnProperty(k)) return axis_props[k]; | |
1942 | return self.attr_(k); | |
1943 | }; | |
f09fc545 | 1944 | |
0d64e596 DV |
1945 | var ticks = []; |
1946 | if (vals) { | |
1947 | for (var i = 0; i < vals.length; i++) { | |
1948 | ticks.push({v: vals[i]}); | |
1949 | } | |
f09e46d4 | 1950 | } else { |
7d0e7a0d | 1951 | if (axis_props && attr("logscale")) { |
ff022deb | 1952 | var pixelsPerTick = attr('pixelsPerYLabel'); |
7d0e7a0d | 1953 | // NOTE(konigsberg): Dan, should self.height_ be self.plotter_.area.h? |
ff022deb | 1954 | var nTicks = Math.floor(self.height_ / pixelsPerTick); |
6821efbe RK |
1955 | var minIdx = null; |
1956 | var maxIdx = null; | |
1957 | // Count the number of tick values would appear, if we can get at least | |
1958 | // nTicks / 3 accept them. | |
1959 | for (var idx = 0; idx < Dygraph.DEFAULT_PREFERRED_LOG_TICK_VALUES.length; idx++) { | |
1960 | var v = Dygraph.DEFAULT_PREFERRED_LOG_TICK_VALUES[idx]; | |
1961 | if (v == minV && minIdx == null) { | |
1962 | minIdx = idx; | |
1963 | } | |
1964 | if (v > minV && minIdx == null && idx > 0) { | |
1965 | minIdx = idx - 1; | |
1966 | } | |
1967 | if (maxIdx == null && v >= maxV) { | |
1968 | maxIdx = idx; | |
1969 | break; // At this point we're done. | |
1970 | } | |
ff022deb | 1971 | } |
6821efbe RK |
1972 | if (minIdx == null) { |
1973 | minIdx = 0; | |
1974 | } | |
1975 | if (maxIdx == null) { | |
1976 | maxIdx = Dygraph.DEFAULT_PREFERRED_LOG_TICK_VALUES.length - 1; | |
1977 | } | |
1978 | if ((maxIdx - minIdx) * 4 >= nTicks) { | |
1979 | for (var idx = minIdx; idx <= maxIdx; idx++) { | |
1980 | ticks.push({ v: Dygraph.DEFAULT_PREFERRED_LOG_TICK_VALUES[idx] }); | |
1981 | } | |
1982 | } | |
1983 | } | |
1984 | // ticks.length won't be 0 if the log scale function finds values to insert. | |
1985 | if (ticks.length == 0) { | |
ff022deb RK |
1986 | // Basic idea: |
1987 | // Try labels every 1, 2, 5, 10, 20, 50, 100, etc. | |
1988 | // Calculate the resulting tick spacing (i.e. this.height_ / nTicks). | |
1989 | // The first spacing greater than pixelsPerYLabel is what we use. | |
1990 | // TODO(danvk): version that works on a log scale. | |
0d64e596 | 1991 | if (attr("labelsKMG2")) { |
ff022deb | 1992 | var mults = [1, 2, 4, 8]; |
0d64e596 | 1993 | } else { |
ff022deb | 1994 | var mults = [1, 2, 5]; |
0d64e596 | 1995 | } |
ff022deb RK |
1996 | var scale, low_val, high_val, nTicks; |
1997 | // TODO(danvk): make it possible to set this for x- and y-axes independently. | |
1998 | var pixelsPerTick = attr('pixelsPerYLabel'); | |
1999 | for (var i = -10; i < 50; i++) { | |
2000 | if (attr("labelsKMG2")) { | |
2001 | var base_scale = Math.pow(16, i); | |
2002 | } else { | |
2003 | var base_scale = Math.pow(10, i); | |
2004 | } | |
2005 | for (var j = 0; j < mults.length; j++) { | |
2006 | scale = base_scale * mults[j]; | |
2007 | low_val = Math.floor(minV / scale) * scale; | |
2008 | high_val = Math.ceil(maxV / scale) * scale; | |
2009 | nTicks = Math.abs(high_val - low_val) / scale; | |
2010 | var spacing = self.height_ / nTicks; | |
2011 | // wish I could break out of both loops at once... | |
2012 | if (spacing > pixelsPerTick) break; | |
2013 | } | |
0d64e596 DV |
2014 | if (spacing > pixelsPerTick) break; |
2015 | } | |
0d64e596 | 2016 | |
ff022deb RK |
2017 | // Construct the set of ticks. |
2018 | // Allow reverse y-axis if it's explicitly requested. | |
2019 | if (low_val > high_val) scale *= -1; | |
2020 | for (var i = 0; i < nTicks; i++) { | |
2021 | var tickV = low_val + i * scale; | |
2022 | ticks.push( {v: tickV} ); | |
2023 | } | |
0d64e596 | 2024 | } |
6a1aa64f DV |
2025 | } |
2026 | ||
0d64e596 | 2027 | // Add formatted labels to the ticks. |
ed11be50 DV |
2028 | var k; |
2029 | var k_labels = []; | |
f09fc545 | 2030 | if (attr("labelsKMB")) { |
ed11be50 DV |
2031 | k = 1000; |
2032 | k_labels = [ "K", "M", "B", "T" ]; | |
2033 | } | |
f09fc545 | 2034 | if (attr("labelsKMG2")) { |
ed11be50 DV |
2035 | if (k) self.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); |
2036 | k = 1024; | |
2037 | k_labels = [ "k", "M", "G", "T" ]; | |
2038 | } | |
c94eee24 | 2039 | var formatter = attr('yAxisLabelFormatter') ? attr('yAxisLabelFormatter') : attr('yValueFormatter'); |
ed11be50 | 2040 | |
0d64e596 DV |
2041 | for (var i = 0; i < ticks.length; i++) { |
2042 | var tickV = ticks[i].v; | |
0af6e346 | 2043 | var absTickV = Math.abs(tickV); |
84fc6aa7 NN |
2044 | var label; |
2045 | if (formatter != undefined) { | |
2046 | label = formatter(tickV); | |
2047 | } else { | |
2048 | label = Dygraph.round_(tickV, 2); | |
2049 | } | |
ed11be50 DV |
2050 | if (k_labels.length) { |
2051 | // Round up to an appropriate unit. | |
2052 | var n = k*k*k*k; | |
2053 | for (var j = 3; j >= 0; j--, n /= k) { | |
2054 | if (absTickV >= n) { | |
029da4b6 | 2055 | label = Dygraph.round_(tickV / n, 1) + k_labels[j]; |
ed11be50 DV |
2056 | break; |
2057 | } | |
afefbcdb | 2058 | } |
6a1aa64f | 2059 | } |
0d64e596 | 2060 | ticks[i].label = label; |
6a1aa64f DV |
2061 | } |
2062 | return ticks; | |
2063 | }; | |
2064 | ||
5011e7a1 DV |
2065 | // Computes the range of the data series (including confidence intervals). |
2066 | // series is either [ [x1, y1], [x2, y2], ... ] or | |
2067 | // [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... | |
2068 | // Returns [low, high] | |
2069 | Dygraph.prototype.extremeValues_ = function(series) { | |
2070 | var minY = null, maxY = null; | |
2071 | ||
9922b78b | 2072 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
5011e7a1 DV |
2073 | if (bars) { |
2074 | // With custom bars, maxY is the max of the high values. | |
2075 | for (var j = 0; j < series.length; j++) { | |
2076 | var y = series[j][1][0]; | |
2077 | if (!y) continue; | |
2078 | var low = y - series[j][1][1]; | |
2079 | var high = y + series[j][1][2]; | |
2080 | if (low > y) low = y; // this can happen with custom bars, | |
2081 | if (high < y) high = y; // e.g. in tests/custom-bars.html | |
2082 | if (maxY == null || high > maxY) { | |
2083 | maxY = high; | |
2084 | } | |
2085 | if (minY == null || low < minY) { | |
2086 | minY = low; | |
2087 | } | |
2088 | } | |
2089 | } else { | |
2090 | for (var j = 0; j < series.length; j++) { | |
2091 | var y = series[j][1]; | |
d12999d3 | 2092 | if (y === null || isNaN(y)) continue; |
5011e7a1 DV |
2093 | if (maxY == null || y > maxY) { |
2094 | maxY = y; | |
2095 | } | |
2096 | if (minY == null || y < minY) { | |
2097 | minY = y; | |
2098 | } | |
2099 | } | |
2100 | } | |
2101 | ||
2102 | return [minY, maxY]; | |
2103 | }; | |
2104 | ||
6a1aa64f | 2105 | /** |
26ca7938 DV |
2106 | * This function is called once when the chart's data is changed or the options |
2107 | * dictionary is updated. It is _not_ called when the user pans or zooms. The | |
2108 | * idea is that values derived from the chart's data can be computed here, | |
2109 | * rather than every time the chart is drawn. This includes things like the | |
2110 | * number of axes, rolling averages, etc. | |
2111 | */ | |
2112 | Dygraph.prototype.predraw_ = function() { | |
7d0e7a0d | 2113 | // TODO(danvk): movabilitye more computations out of drawGraph_ and into here. |
26ca7938 DV |
2114 | this.computeYAxes_(); |
2115 | ||
2116 | // Create a new plotter. | |
70c80071 | 2117 | if (this.plotter_) this.plotter_.clear(); |
26ca7938 DV |
2118 | this.plotter_ = new DygraphCanvasRenderer(this, |
2119 | this.hidden_, this.layout_, | |
2120 | this.renderOptions_); | |
2121 | ||
0abfbd7e DV |
2122 | // The roller sits in the bottom left corner of the chart. We don't know where |
2123 | // this will be until the options are available, so it's positioned here. | |
8c69de65 | 2124 | this.createRollInterface_(); |
26ca7938 | 2125 | |
0abfbd7e DV |
2126 | // Same thing applies for the labelsDiv. It's right edge should be flush with |
2127 | // the right edge of the charting area (which may not be the same as the right | |
2128 | // edge of the div, if we have two y-axes. | |
2129 | this.positionLabelsDiv_(); | |
2130 | ||
26ca7938 DV |
2131 | // If the data or options have changed, then we'd better redraw. |
2132 | this.drawGraph_(); | |
2133 | }; | |
2134 | ||
2135 | /** | |
2136 | * Update the graph with new data. This method is called when the viewing area | |
2137 | * has changed. If the underlying data or options have changed, predraw_ will | |
2138 | * be called before drawGraph_ is called. | |
6a1aa64f DV |
2139 | * @private |
2140 | */ | |
26ca7938 DV |
2141 | Dygraph.prototype.drawGraph_ = function() { |
2142 | var data = this.rawData_; | |
2143 | ||
fe0b7c03 DV |
2144 | // This is used to set the second parameter to drawCallback, below. |
2145 | var is_initial_draw = this.is_initial_draw_; | |
2146 | this.is_initial_draw_ = false; | |
2147 | ||
3bd9c228 | 2148 | var minY = null, maxY = null; |
6a1aa64f | 2149 | this.layout_.removeAllDatasets(); |
285a6bda | 2150 | this.setColors_(); |
9317362d | 2151 | this.attrs_['pointSize'] = 0.5 * this.attr_('highlightCircleSize'); |
285a6bda | 2152 | |
354e15ab DE |
2153 | // Loop over the fields (series). Go from the last to the first, |
2154 | // because if they're stacked that's how we accumulate the values. | |
43af96e7 | 2155 | |
354e15ab DE |
2156 | var cumulative_y = []; // For stacked series. |
2157 | var datasets = []; | |
2158 | ||
f09fc545 DV |
2159 | var extremes = {}; // series name -> [low, high] |
2160 | ||
354e15ab DE |
2161 | // Loop over all fields and create datasets |
2162 | for (var i = data[0].length - 1; i >= 1; i--) { | |
1cf11047 DV |
2163 | if (!this.visibility()[i - 1]) continue; |
2164 | ||
f09fc545 | 2165 | var seriesName = this.attr_("labels")[i]; |
450fe64b | 2166 | var connectSeparatedPoints = this.attr_('connectSeparatedPoints', i); |
6e6a2b0a | 2167 | var logScale = this.attr_('logscale', i); |
450fe64b | 2168 | |
6a1aa64f DV |
2169 | var series = []; |
2170 | for (var j = 0; j < data.length; j++) { | |
6e6a2b0a RK |
2171 | var date = data[j][0]; |
2172 | var point = data[j][i]; | |
2173 | if (logScale) { | |
2174 | // On the log scale, points less than zero do not exist. | |
2175 | // This will create a gap in the chart. Note that this ignores | |
2176 | // connectSeparatedPoints. | |
2177 | if (point < 0) { | |
2178 | point = null; | |
2179 | } | |
2180 | series.push([date, point]); | |
2181 | } else { | |
2182 | if (point != null || !connectSeparatedPoints) { | |
2183 | series.push([date, point]); | |
2184 | } | |
f032c51d | 2185 | } |
6a1aa64f | 2186 | } |
2f5e7e1a DV |
2187 | |
2188 | // TODO(danvk): move this into predraw_. It's insane to do it here. | |
6a1aa64f DV |
2189 | series = this.rollingAverage(series, this.rollPeriod_); |
2190 | ||
2191 | // Prune down to the desired range, if necessary (for zooming) | |
1a26f3fb DV |
2192 | // Because there can be lines going to points outside of the visible area, |
2193 | // we actually prune to visible points, plus one on either side. | |
9922b78b | 2194 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
6a1aa64f DV |
2195 | if (this.dateWindow_) { |
2196 | var low = this.dateWindow_[0]; | |
2197 | var high= this.dateWindow_[1]; | |
2198 | var pruned = []; | |
1a26f3fb DV |
2199 | // TODO(danvk): do binary search instead of linear search. |
2200 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. | |
2201 | var firstIdx = null, lastIdx = null; | |
6a1aa64f | 2202 | for (var k = 0; k < series.length; k++) { |
1a26f3fb DV |
2203 | if (series[k][0] >= low && firstIdx === null) { |
2204 | firstIdx = k; | |
2205 | } | |
2206 | if (series[k][0] <= high) { | |
2207 | lastIdx = k; | |
6a1aa64f DV |
2208 | } |
2209 | } | |
1a26f3fb DV |
2210 | if (firstIdx === null) firstIdx = 0; |
2211 | if (firstIdx > 0) firstIdx--; | |
2212 | if (lastIdx === null) lastIdx = series.length - 1; | |
2213 | if (lastIdx < series.length - 1) lastIdx++; | |
16269f6e | 2214 | this.boundaryIds_[i-1] = [firstIdx, lastIdx]; |
1a26f3fb DV |
2215 | for (var k = firstIdx; k <= lastIdx; k++) { |
2216 | pruned.push(series[k]); | |
6a1aa64f DV |
2217 | } |
2218 | series = pruned; | |
16269f6e NAG |
2219 | } else { |
2220 | this.boundaryIds_[i-1] = [0, series.length-1]; | |
6a1aa64f DV |
2221 | } |
2222 | ||
f09fc545 | 2223 | var seriesExtremes = this.extremeValues_(series); |
5011e7a1 | 2224 | |
6a1aa64f | 2225 | if (bars) { |
354e15ab DE |
2226 | for (var j=0; j<series.length; j++) { |
2227 | val = [series[j][0], series[j][1][0], series[j][1][1], series[j][1][2]]; | |
2228 | series[j] = val; | |
2229 | } | |
43af96e7 | 2230 | } else if (this.attr_("stackedGraph")) { |
43af96e7 NK |
2231 | var l = series.length; |
2232 | var actual_y; | |
2233 | for (var j = 0; j < l; j++) { | |
354e15ab DE |
2234 | // If one data set has a NaN, let all subsequent stacked |
2235 | // sets inherit the NaN -- only start at 0 for the first set. | |
2236 | var x = series[j][0]; | |
41b0f691 | 2237 | if (cumulative_y[x] === undefined) { |
354e15ab | 2238 | cumulative_y[x] = 0; |
41b0f691 | 2239 | } |
43af96e7 NK |
2240 | |
2241 | actual_y = series[j][1]; | |
354e15ab | 2242 | cumulative_y[x] += actual_y; |
43af96e7 | 2243 | |
354e15ab | 2244 | series[j] = [x, cumulative_y[x]] |
43af96e7 | 2245 | |
41b0f691 DV |
2246 | if (cumulative_y[x] > seriesExtremes[1]) { |
2247 | seriesExtremes[1] = cumulative_y[x]; | |
2248 | } | |
2249 | if (cumulative_y[x] < seriesExtremes[0]) { | |
2250 | seriesExtremes[0] = cumulative_y[x]; | |
2251 | } | |
43af96e7 | 2252 | } |
6a1aa64f | 2253 | } |
41b0f691 | 2254 | extremes[seriesName] = seriesExtremes; |
354e15ab DE |
2255 | |
2256 | datasets[i] = series; | |
6a1aa64f DV |
2257 | } |
2258 | ||
354e15ab | 2259 | for (var i = 1; i < datasets.length; i++) { |
4523c1f6 | 2260 | if (!this.visibility()[i - 1]) continue; |
354e15ab | 2261 | this.layout_.addDataset(this.attr_("labels")[i], datasets[i]); |
43af96e7 NK |
2262 | } |
2263 | ||
26ca7938 DV |
2264 | // TODO(danvk): this method doesn't need to return anything. |
2265 | var out = this.computeYAxisRanges_(extremes); | |
f09fc545 DV |
2266 | var axes = out[0]; |
2267 | var seriesToAxisMap = out[1]; | |
9012dd21 | 2268 | this.layout_.updateOptions( { yAxes: axes, |
ea4942ed | 2269 | seriesToAxisMap: seriesToAxisMap |
9012dd21 | 2270 | } ); |
f09fc545 | 2271 | |
6a1aa64f DV |
2272 | this.addXTicks_(); |
2273 | ||
2274 | // Tell PlotKit to use this new data and render itself | |
d033ae1c | 2275 | this.layout_.updateOptions({dateWindow: this.dateWindow_}); |
6a1aa64f DV |
2276 | this.layout_.evaluateWithError(); |
2277 | this.plotter_.clear(); | |
2278 | this.plotter_.render(); | |
f6401bf6 | 2279 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
2f5e7e1a | 2280 | this.canvas_.height); |
599fb4ad DV |
2281 | |
2282 | if (this.attr_("drawCallback") !== null) { | |
fe0b7c03 | 2283 | this.attr_("drawCallback")(this, is_initial_draw); |
599fb4ad | 2284 | } |
6a1aa64f DV |
2285 | }; |
2286 | ||
2287 | /** | |
26ca7938 DV |
2288 | * Determine properties of the y-axes which are independent of the data |
2289 | * currently being displayed. This includes things like the number of axes and | |
2290 | * the style of the axes. It does not include the range of each axis and its | |
2291 | * tick marks. | |
2292 | * This fills in this.axes_ and this.seriesToAxisMap_. | |
2293 | * axes_ = [ { options } ] | |
2294 | * seriesToAxisMap_ = { seriesName: 0, seriesName2: 1, ... } | |
2295 | * indices are into the axes_ array. | |
f09fc545 | 2296 | */ |
26ca7938 DV |
2297 | Dygraph.prototype.computeYAxes_ = function() { |
2298 | this.axes_ = [{}]; // always have at least one y-axis. | |
2299 | this.seriesToAxisMap_ = {}; | |
2300 | ||
2301 | // Get a list of series names. | |
2302 | var labels = this.attr_("labels"); | |
1c77a3a1 | 2303 | var series = {}; |
26ca7938 | 2304 | for (var i = 1; i < labels.length; i++) series[labels[i]] = (i - 1); |
f09fc545 DV |
2305 | |
2306 | // all options which could be applied per-axis: | |
2307 | var axisOptions = [ | |
2308 | 'includeZero', | |
2309 | 'valueRange', | |
2310 | 'labelsKMB', | |
2311 | 'labelsKMG2', | |
2312 | 'pixelsPerYLabel', | |
2313 | 'yAxisLabelWidth', | |
2314 | 'axisLabelFontSize', | |
7d0e7a0d RK |
2315 | 'axisTickSize', |
2316 | 'logscale' | |
f09fc545 DV |
2317 | ]; |
2318 | ||
2319 | // Copy global axis options over to the first axis. | |
2320 | for (var i = 0; i < axisOptions.length; i++) { | |
2321 | var k = axisOptions[i]; | |
2322 | var v = this.attr_(k); | |
26ca7938 | 2323 | if (v) this.axes_[0][k] = v; |
f09fc545 DV |
2324 | } |
2325 | ||
2326 | // Go through once and add all the axes. | |
26ca7938 DV |
2327 | for (var seriesName in series) { |
2328 | if (!series.hasOwnProperty(seriesName)) continue; | |
f09fc545 DV |
2329 | var axis = this.attr_("axis", seriesName); |
2330 | if (axis == null) { | |
26ca7938 | 2331 | this.seriesToAxisMap_[seriesName] = 0; |
f09fc545 DV |
2332 | continue; |
2333 | } | |
2334 | if (typeof(axis) == 'object') { | |
2335 | // Add a new axis, making a copy of its per-axis options. | |
2336 | var opts = {}; | |
26ca7938 | 2337 | Dygraph.update(opts, this.axes_[0]); |
f09fc545 DV |
2338 | Dygraph.update(opts, { valueRange: null }); // shouldn't inherit this. |
2339 | Dygraph.update(opts, axis); | |
26ca7938 DV |
2340 | this.axes_.push(opts); |
2341 | this.seriesToAxisMap_[seriesName] = this.axes_.length - 1; | |
f09fc545 DV |
2342 | } |
2343 | } | |
2344 | ||
2345 | // Go through one more time and assign series to an axis defined by another | |
2346 | // series, e.g. { 'Y1: { axis: {} }, 'Y2': { axis: 'Y1' } } | |
26ca7938 DV |
2347 | for (var seriesName in series) { |
2348 | if (!series.hasOwnProperty(seriesName)) continue; | |
f09fc545 DV |
2349 | var axis = this.attr_("axis", seriesName); |
2350 | if (typeof(axis) == 'string') { | |
26ca7938 | 2351 | if (!this.seriesToAxisMap_.hasOwnProperty(axis)) { |
f09fc545 DV |
2352 | this.error("Series " + seriesName + " wants to share a y-axis with " + |
2353 | "series " + axis + ", which does not define its own axis."); | |
2354 | return null; | |
2355 | } | |
26ca7938 DV |
2356 | var idx = this.seriesToAxisMap_[axis]; |
2357 | this.seriesToAxisMap_[seriesName] = idx; | |
f09fc545 DV |
2358 | } |
2359 | } | |
1c77a3a1 DV |
2360 | |
2361 | // Now we remove series from seriesToAxisMap_ which are not visible. We do | |
2362 | // this last so that hiding the first series doesn't destroy the axis | |
2363 | // properties of the primary axis. | |
2364 | var seriesToAxisFiltered = {}; | |
2365 | var vis = this.visibility(); | |
2366 | for (var i = 1; i < labels.length; i++) { | |
2367 | var s = labels[i]; | |
2368 | if (vis[i - 1]) seriesToAxisFiltered[s] = this.seriesToAxisMap_[s]; | |
2369 | } | |
2370 | this.seriesToAxisMap_ = seriesToAxisFiltered; | |
26ca7938 DV |
2371 | }; |
2372 | ||
2373 | /** | |
2374 | * Returns the number of y-axes on the chart. | |
2375 | * @return {Number} the number of axes. | |
2376 | */ | |
2377 | Dygraph.prototype.numAxes = function() { | |
2378 | var last_axis = 0; | |
2379 | for (var series in this.seriesToAxisMap_) { | |
2380 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; | |
2381 | var idx = this.seriesToAxisMap_[series]; | |
2382 | if (idx > last_axis) last_axis = idx; | |
2383 | } | |
2384 | return 1 + last_axis; | |
2385 | }; | |
2386 | ||
2387 | /** | |
2388 | * Determine the value range and tick marks for each axis. | |
2389 | * @param {Object} extremes A mapping from seriesName -> [low, high] | |
2390 | * This fills in the valueRange and ticks fields in each entry of this.axes_. | |
2391 | */ | |
2392 | Dygraph.prototype.computeYAxisRanges_ = function(extremes) { | |
2393 | // Build a map from axis number -> [list of series names] | |
2394 | var seriesForAxis = []; | |
2395 | for (var series in this.seriesToAxisMap_) { | |
2396 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; | |
2397 | var idx = this.seriesToAxisMap_[series]; | |
2398 | while (seriesForAxis.length <= idx) seriesForAxis.push([]); | |
2399 | seriesForAxis[idx].push(series); | |
2400 | } | |
f09fc545 DV |
2401 | |
2402 | // Compute extreme values, a span and tick marks for each axis. | |
26ca7938 DV |
2403 | for (var i = 0; i < this.axes_.length; i++) { |
2404 | var axis = this.axes_[i]; | |
d58ae307 DV |
2405 | if (axis.valueWindow) { |
2406 | // This is only set if the user has zoomed on the y-axis. It is never set | |
2407 | // by a user. It takes precedence over axis.valueRange because, if you set | |
2408 | // valueRange, you'd still expect to be able to pan. | |
2409 | axis.computedValueRange = [axis.valueWindow[0], axis.valueWindow[1]]; | |
2410 | } else if (axis.valueRange) { | |
2411 | // This is a user-set value range for this axis. | |
26ca7938 DV |
2412 | axis.computedValueRange = [axis.valueRange[0], axis.valueRange[1]]; |
2413 | } else { | |
1c77a3a1 | 2414 | // Calculate the extremes of extremes. |
f09fc545 DV |
2415 | var series = seriesForAxis[i]; |
2416 | var minY = Infinity; // extremes[series[0]][0]; | |
2417 | var maxY = -Infinity; // extremes[series[0]][1]; | |
2418 | for (var j = 0; j < series.length; j++) { | |
2419 | minY = Math.min(extremes[series[j]][0], minY); | |
e3b6727e | 2420 | maxY = Math.max(extremes[series[j]][1], maxY); |
f09fc545 DV |
2421 | } |
2422 | if (axis.includeZero && minY > 0) minY = 0; | |
2423 | ||
2424 | // Add some padding and round up to an integer to be human-friendly. | |
2425 | var span = maxY - minY; | |
2426 | // special case: if we have no sense of scale, use +/-10% of the sole value. | |
2427 | if (span == 0) { span = maxY; } | |
f09fc545 | 2428 | |
ff022deb RK |
2429 | var maxAxisY; |
2430 | var minAxisY; | |
7d0e7a0d | 2431 | if (axis.logscale) { |
ff022deb RK |
2432 | var maxAxisY = maxY + 0.1 * span; |
2433 | var minAxisY = minY; | |
2434 | } else { | |
2435 | var maxAxisY = maxY + 0.1 * span; | |
2436 | var minAxisY = minY - 0.1 * span; | |
2437 | ||
2438 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. | |
2439 | if (!this.attr_("avoidMinZero")) { | |
2440 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; | |
2441 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
2442 | } | |
f09fc545 | 2443 | |
ff022deb RK |
2444 | if (this.attr_("includeZero")) { |
2445 | if (maxY < 0) maxAxisY = 0; | |
2446 | if (minY > 0) minAxisY = 0; | |
2447 | } | |
f09fc545 DV |
2448 | } |
2449 | ||
26ca7938 | 2450 | axis.computedValueRange = [minAxisY, maxAxisY]; |
f09fc545 DV |
2451 | } |
2452 | ||
0d64e596 DV |
2453 | // Add ticks. By default, all axes inherit the tick positions of the |
2454 | // primary axis. However, if an axis is specifically marked as having | |
2455 | // independent ticks, then that is permissible as well. | |
2456 | if (i == 0 || axis.independentTicks) { | |
2457 | axis.ticks = | |
2458 | Dygraph.numericTicks(axis.computedValueRange[0], | |
2459 | axis.computedValueRange[1], | |
2460 | this, | |
2461 | axis); | |
2462 | } else { | |
2463 | var p_axis = this.axes_[0]; | |
2464 | var p_ticks = p_axis.ticks; | |
2465 | var p_scale = p_axis.computedValueRange[1] - p_axis.computedValueRange[0]; | |
2466 | var scale = axis.computedValueRange[1] - axis.computedValueRange[0]; | |
2467 | var tick_values = []; | |
2468 | for (var i = 0; i < p_ticks.length; i++) { | |
2469 | var y_frac = (p_ticks[i].v - p_axis.computedValueRange[0]) / p_scale; | |
2470 | var y_val = axis.computedValueRange[0] + y_frac * scale; | |
2471 | tick_values.push(y_val); | |
2472 | } | |
2473 | ||
2474 | axis.ticks = | |
2475 | Dygraph.numericTicks(axis.computedValueRange[0], | |
2476 | axis.computedValueRange[1], | |
2477 | this, axis, tick_values); | |
2478 | } | |
f09fc545 DV |
2479 | } |
2480 | ||
26ca7938 | 2481 | return [this.axes_, this.seriesToAxisMap_]; |
f09fc545 DV |
2482 | }; |
2483 | ||
2484 | /** | |
6a1aa64f DV |
2485 | * Calculates the rolling average of a data set. |
2486 | * If originalData is [label, val], rolls the average of those. | |
2487 | * If originalData is [label, [, it's interpreted as [value, stddev] | |
2488 | * and the roll is returned in the same form, with appropriately reduced | |
2489 | * stddev for each value. | |
2490 | * Note that this is where fractional input (i.e. '5/10') is converted into | |
2491 | * decimal values. | |
2492 | * @param {Array} originalData The data in the appropriate format (see above) | |
2493 | * @param {Number} rollPeriod The number of days over which to average the data | |
2494 | */ | |
285a6bda | 2495 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
6a1aa64f DV |
2496 | if (originalData.length < 2) |
2497 | return originalData; | |
2498 | var rollPeriod = Math.min(rollPeriod, originalData.length - 1); | |
2499 | var rollingData = []; | |
285a6bda | 2500 | var sigma = this.attr_("sigma"); |
6a1aa64f DV |
2501 | |
2502 | if (this.fractions_) { | |
2503 | var num = 0; | |
2504 | var den = 0; // numerator/denominator | |
2505 | var mult = 100.0; | |
2506 | for (var i = 0; i < originalData.length; i++) { | |
2507 | num += originalData[i][1][0]; | |
2508 | den += originalData[i][1][1]; | |
2509 | if (i - rollPeriod >= 0) { | |
2510 | num -= originalData[i - rollPeriod][1][0]; | |
2511 | den -= originalData[i - rollPeriod][1][1]; | |
2512 | } | |
2513 | ||
2514 | var date = originalData[i][0]; | |
2515 | var value = den ? num / den : 0.0; | |
285a6bda | 2516 | if (this.attr_("errorBars")) { |
6a1aa64f DV |
2517 | if (this.wilsonInterval_) { |
2518 | // For more details on this confidence interval, see: | |
2519 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval | |
2520 | if (den) { | |
2521 | var p = value < 0 ? 0 : value, n = den; | |
2522 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); | |
2523 | var denom = 1 + sigma * sigma / den; | |
2524 | var low = (p + sigma * sigma / (2 * den) - pm) / denom; | |
2525 | var high = (p + sigma * sigma / (2 * den) + pm) / denom; | |
2526 | rollingData[i] = [date, | |
2527 | [p * mult, (p - low) * mult, (high - p) * mult]]; | |
2528 | } else { | |
2529 | rollingData[i] = [date, [0, 0, 0]]; | |
2530 | } | |
2531 | } else { | |
2532 | var stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; | |
2533 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; | |
2534 | } | |
2535 | } else { | |
2536 | rollingData[i] = [date, mult * value]; | |
2537 | } | |
2538 | } | |
9922b78b | 2539 | } else if (this.attr_("customBars")) { |
f6885d6a DV |
2540 | var low = 0; |
2541 | var mid = 0; | |
2542 | var high = 0; | |
2543 | var count = 0; | |
6a1aa64f DV |
2544 | for (var i = 0; i < originalData.length; i++) { |
2545 | var data = originalData[i][1]; | |
2546 | var y = data[1]; | |
2547 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; | |
f6885d6a | 2548 | |
8b91c51f | 2549 | if (y != null && !isNaN(y)) { |
49a7d0d5 DV |
2550 | low += data[0]; |
2551 | mid += y; | |
2552 | high += data[2]; | |
2553 | count += 1; | |
2554 | } | |
f6885d6a DV |
2555 | if (i - rollPeriod >= 0) { |
2556 | var prev = originalData[i - rollPeriod]; | |
8b91c51f | 2557 | if (prev[1][1] != null && !isNaN(prev[1][1])) { |
49a7d0d5 DV |
2558 | low -= prev[1][0]; |
2559 | mid -= prev[1][1]; | |
2560 | high -= prev[1][2]; | |
2561 | count -= 1; | |
2562 | } | |
f6885d6a DV |
2563 | } |
2564 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, | |
2565 | 1.0 * (mid - low) / count, | |
2566 | 1.0 * (high - mid) / count ]]; | |
2769de62 | 2567 | } |
6a1aa64f DV |
2568 | } else { |
2569 | // Calculate the rolling average for the first rollPeriod - 1 points where | |
2570 | // there is not enough data to roll over the full number of days | |
2571 | var num_init_points = Math.min(rollPeriod - 1, originalData.length - 2); | |
285a6bda | 2572 | if (!this.attr_("errorBars")){ |
5011e7a1 DV |
2573 | if (rollPeriod == 1) { |
2574 | return originalData; | |
2575 | } | |
2576 | ||
2847c1cf | 2577 | for (var i = 0; i < originalData.length; i++) { |
6a1aa64f | 2578 | var sum = 0; |
5011e7a1 | 2579 | var num_ok = 0; |
2847c1cf DV |
2580 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
2581 | var y = originalData[j][1]; | |
8b91c51f | 2582 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 2583 | num_ok++; |
2847c1cf | 2584 | sum += originalData[j][1]; |
6a1aa64f | 2585 | } |
5011e7a1 | 2586 | if (num_ok) { |
2847c1cf | 2587 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
5011e7a1 | 2588 | } else { |
2847c1cf | 2589 | rollingData[i] = [originalData[i][0], null]; |
5011e7a1 | 2590 | } |
6a1aa64f | 2591 | } |
2847c1cf DV |
2592 | |
2593 | } else { | |
2594 | for (var i = 0; i < originalData.length; i++) { | |
6a1aa64f DV |
2595 | var sum = 0; |
2596 | var variance = 0; | |
5011e7a1 | 2597 | var num_ok = 0; |
2847c1cf | 2598 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
5011e7a1 | 2599 | var y = originalData[j][1][0]; |
8b91c51f | 2600 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 2601 | num_ok++; |
6a1aa64f DV |
2602 | sum += originalData[j][1][0]; |
2603 | variance += Math.pow(originalData[j][1][1], 2); | |
2604 | } | |
5011e7a1 DV |
2605 | if (num_ok) { |
2606 | var stddev = Math.sqrt(variance) / num_ok; | |
2607 | rollingData[i] = [originalData[i][0], | |
2608 | [sum / num_ok, sigma * stddev, sigma * stddev]]; | |
2609 | } else { | |
2610 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
2611 | } | |
6a1aa64f DV |
2612 | } |
2613 | } | |
2614 | } | |
2615 | ||
2616 | return rollingData; | |
2617 | }; | |
2618 | ||
2619 | /** | |
2620 | * Parses a date, returning the number of milliseconds since epoch. This can be | |
285a6bda DV |
2621 | * passed in as an xValueParser in the Dygraph constructor. |
2622 | * TODO(danvk): enumerate formats that this understands. | |
6a1aa64f DV |
2623 | * @param {String} A date in YYYYMMDD format. |
2624 | * @return {Number} Milliseconds since epoch. | |
2625 | * @public | |
2626 | */ | |
285a6bda | 2627 | Dygraph.dateParser = function(dateStr, self) { |
6a1aa64f | 2628 | var dateStrSlashed; |
285a6bda | 2629 | var d; |
986a5026 | 2630 | if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12' |
6a1aa64f | 2631 | dateStrSlashed = dateStr.replace("-", "/", "g"); |
353a0294 DV |
2632 | while (dateStrSlashed.search("-") != -1) { |
2633 | dateStrSlashed = dateStrSlashed.replace("-", "/"); | |
2634 | } | |
285a6bda | 2635 | d = Date.parse(dateStrSlashed); |
2769de62 | 2636 | } else if (dateStr.length == 8) { // e.g. '20090712' |
285a6bda | 2637 | // TODO(danvk): remove support for this format. It's confusing. |
6a1aa64f DV |
2638 | dateStrSlashed = dateStr.substr(0,4) + "/" + dateStr.substr(4,2) |
2639 | + "/" + dateStr.substr(6,2); | |
285a6bda | 2640 | d = Date.parse(dateStrSlashed); |
2769de62 DV |
2641 | } else { |
2642 | // Any format that Date.parse will accept, e.g. "2009/07/12" or | |
2643 | // "2009/07/12 12:34:56" | |
285a6bda DV |
2644 | d = Date.parse(dateStr); |
2645 | } | |
2646 | ||
2647 | if (!d || isNaN(d)) { | |
2648 | self.error("Couldn't parse " + dateStr + " as a date"); | |
2649 | } | |
2650 | return d; | |
2651 | }; | |
2652 | ||
2653 | /** | |
2654 | * Detects the type of the str (date or numeric) and sets the various | |
2655 | * formatting attributes in this.attrs_ based on this type. | |
2656 | * @param {String} str An x value. | |
2657 | * @private | |
2658 | */ | |
2659 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
2660 | var isDate = false; | |
2661 | if (str.indexOf('-') >= 0 || | |
2662 | str.indexOf('/') >= 0 || | |
2663 | isNaN(parseFloat(str))) { | |
2664 | isDate = true; | |
2665 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
2666 | // TODO(danvk): remove support for this format. | |
2667 | isDate = true; | |
2668 | } | |
2669 | ||
2670 | if (isDate) { | |
2671 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
2672 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2673 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2674 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
2675 | } else { |
2676 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
2677 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
2678 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2679 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
6a1aa64f | 2680 | } |
6a1aa64f DV |
2681 | }; |
2682 | ||
2683 | /** | |
2684 | * Parses a string in a special csv format. We expect a csv file where each | |
2685 | * line is a date point, and the first field in each line is the date string. | |
2686 | * We also expect that all remaining fields represent series. | |
285a6bda | 2687 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f DV |
2688 | * date, series1, stddev1, series2, stddev2, ... |
2689 | * @param {Array.<Object>} data See above. | |
2690 | * @private | |
285a6bda DV |
2691 | * |
2692 | * @return Array.<Object> An array with one entry for each row. These entries | |
2693 | * are an array of cells in that row. The first entry is the parsed x-value for | |
2694 | * the row. The second, third, etc. are the y-values. These can take on one of | |
2695 | * three forms, depending on the CSV and constructor parameters: | |
2696 | * 1. numeric value | |
2697 | * 2. [ value, stddev ] | |
2698 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 2699 | */ |
285a6bda | 2700 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f DV |
2701 | var ret = []; |
2702 | var lines = data.split("\n"); | |
3d67f03b DV |
2703 | |
2704 | // Use the default delimiter or fall back to a tab if that makes sense. | |
2705 | var delim = this.attr_('delimiter'); | |
2706 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { | |
2707 | delim = '\t'; | |
2708 | } | |
2709 | ||
285a6bda | 2710 | var start = 0; |
6a1aa64f | 2711 | if (this.labelsFromCSV_) { |
285a6bda | 2712 | start = 1; |
3d67f03b | 2713 | this.attrs_.labels = lines[0].split(delim); |
6a1aa64f DV |
2714 | } |
2715 | ||
03b522a4 DV |
2716 | // Parse the x as a float or return null if it's not a number. |
2717 | var parseFloatOrNull = function(x) { | |
41333ec0 | 2718 | var val = parseFloat(x); |
1f7f664b DV |
2719 | // isFinite() returns false for NaN and +/-Infinity. |
2720 | return isFinite(val) ? val : null; | |
03b522a4 DV |
2721 | }; |
2722 | ||
285a6bda DV |
2723 | var xParser; |
2724 | var defaultParserSet = false; // attempt to auto-detect x value type | |
2725 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 2726 | var outOfOrder = false; |
6a1aa64f DV |
2727 | for (var i = start; i < lines.length; i++) { |
2728 | var line = lines[i]; | |
2729 | if (line.length == 0) continue; // skip blank lines | |
3d67f03b DV |
2730 | if (line[0] == '#') continue; // skip comment lines |
2731 | var inFields = line.split(delim); | |
285a6bda | 2732 | if (inFields.length < 2) continue; |
6a1aa64f DV |
2733 | |
2734 | var fields = []; | |
285a6bda DV |
2735 | if (!defaultParserSet) { |
2736 | this.detectTypeFromString_(inFields[0]); | |
2737 | xParser = this.attr_("xValueParser"); | |
2738 | defaultParserSet = true; | |
2739 | } | |
2740 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
2741 | |
2742 | // If fractions are expected, parse the numbers as "A/B" | |
2743 | if (this.fractions_) { | |
2744 | for (var j = 1; j < inFields.length; j++) { | |
2745 | // TODO(danvk): figure out an appropriate way to flag parse errors. | |
2746 | var vals = inFields[j].split("/"); | |
03b522a4 | 2747 | fields[j] = [parseFloatOrNull(vals[0]), parseFloatOrNull(vals[1])]; |
6a1aa64f | 2748 | } |
285a6bda | 2749 | } else if (this.attr_("errorBars")) { |
6a1aa64f DV |
2750 | // If there are error bars, values are (value, stddev) pairs |
2751 | for (var j = 1; j < inFields.length; j += 2) | |
03b522a4 DV |
2752 | fields[(j + 1) / 2] = [parseFloatOrNull(inFields[j]), |
2753 | parseFloatOrNull(inFields[j + 1])]; | |
9922b78b | 2754 | } else if (this.attr_("customBars")) { |
6a1aa64f DV |
2755 | // Bars are a low;center;high tuple |
2756 | for (var j = 1; j < inFields.length; j++) { | |
2757 | var vals = inFields[j].split(";"); | |
03b522a4 DV |
2758 | fields[j] = [ parseFloatOrNull(vals[0]), |
2759 | parseFloatOrNull(vals[1]), | |
2760 | parseFloatOrNull(vals[2]) ]; | |
6a1aa64f DV |
2761 | } |
2762 | } else { | |
2763 | // Values are just numbers | |
285a6bda | 2764 | for (var j = 1; j < inFields.length; j++) { |
03b522a4 | 2765 | fields[j] = parseFloatOrNull(inFields[j]); |
285a6bda | 2766 | } |
6a1aa64f | 2767 | } |
987840a2 DV |
2768 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
2769 | outOfOrder = true; | |
2770 | } | |
6a1aa64f | 2771 | ret.push(fields); |
285a6bda DV |
2772 | |
2773 | if (fields.length != expectedCols) { | |
2774 | this.error("Number of columns in line " + i + " (" + fields.length + | |
2775 | ") does not agree with number of labels (" + expectedCols + | |
2776 | ") " + line); | |
2777 | } | |
6a1aa64f | 2778 | } |
987840a2 DV |
2779 | |
2780 | if (outOfOrder) { | |
2781 | this.warn("CSV is out of order; order it correctly to speed loading."); | |
2782 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2783 | } | |
2784 | ||
6a1aa64f DV |
2785 | return ret; |
2786 | }; | |
2787 | ||
2788 | /** | |
285a6bda DV |
2789 | * The user has provided their data as a pre-packaged JS array. If the x values |
2790 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
2791 | * are dates, we need to convert them from Date objects to ms since epoch. | |
2792 | * @param {Array.<Object>} data | |
2793 | * @return {Array.<Object>} data with numeric x values. | |
2794 | */ | |
2795 | Dygraph.prototype.parseArray_ = function(data) { | |
2796 | // Peek at the first x value to see if it's numeric. | |
2797 | if (data.length == 0) { | |
2798 | this.error("Can't plot empty data set"); | |
2799 | return null; | |
2800 | } | |
2801 | if (data[0].length == 0) { | |
2802 | this.error("Data set cannot contain an empty row"); | |
2803 | return null; | |
2804 | } | |
2805 | ||
2806 | if (this.attr_("labels") == null) { | |
2807 | this.warn("Using default labels. Set labels explicitly via 'labels' " + | |
2808 | "in the options parameter"); | |
2809 | this.attrs_.labels = [ "X" ]; | |
2810 | for (var i = 1; i < data[0].length; i++) { | |
2811 | this.attrs_.labels.push("Y" + i); | |
2812 | } | |
2813 | } | |
2814 | ||
2dda3850 | 2815 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda DV |
2816 | // Some intelligent defaults for a date x-axis. |
2817 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
bf640e56 | 2818 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
2819 | this.attrs_.xTicker = Dygraph.dateTicker; |
2820 | ||
2821 | // Assume they're all dates. | |
e3ab7b40 | 2822 | var parsedData = Dygraph.clone(data); |
285a6bda DV |
2823 | for (var i = 0; i < data.length; i++) { |
2824 | if (parsedData[i].length == 0) { | |
a323ff4a | 2825 | this.error("Row " + (1 + i) + " of data is empty"); |
285a6bda DV |
2826 | return null; |
2827 | } | |
2828 | if (parsedData[i][0] == null | |
3a909ec5 DV |
2829 | || typeof(parsedData[i][0].getTime) != 'function' |
2830 | || isNaN(parsedData[i][0].getTime())) { | |
be96a1f5 | 2831 | this.error("x value in row " + (1 + i) + " is not a Date"); |
285a6bda DV |
2832 | return null; |
2833 | } | |
2834 | parsedData[i][0] = parsedData[i][0].getTime(); | |
2835 | } | |
2836 | return parsedData; | |
2837 | } else { | |
2838 | // Some intelligent defaults for a numeric x-axis. | |
2839 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
2840 | this.attrs_.xTicker = Dygraph.numericTicks; | |
2841 | return data; | |
2842 | } | |
2843 | }; | |
2844 | ||
2845 | /** | |
79420a1e DV |
2846 | * Parses a DataTable object from gviz. |
2847 | * The data is expected to have a first column that is either a date or a | |
2848 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
2849 | * between this.xValueParser_ and the type of the first column, it will be | |
a685723c | 2850 | * fixed. Fills out rawData_. |
79420a1e DV |
2851 | * @param {Array.<Object>} data See above. |
2852 | * @private | |
2853 | */ | |
285a6bda | 2854 | Dygraph.prototype.parseDataTable_ = function(data) { |
79420a1e DV |
2855 | var cols = data.getNumberOfColumns(); |
2856 | var rows = data.getNumberOfRows(); | |
2857 | ||
d955e223 | 2858 | var indepType = data.getColumnType(0); |
4440f6c8 | 2859 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda DV |
2860 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
2861 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2862 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2863 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
33127159 | 2864 | } else if (indepType == 'number') { |
285a6bda DV |
2865 | this.attrs_.xValueFormatter = function(x) { return x; }; |
2866 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
2867 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2868 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
285a6bda | 2869 | } else { |
987840a2 DV |
2870 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
2871 | "column 1 of DataTable input (Got '" + indepType + "')"); | |
79420a1e DV |
2872 | return null; |
2873 | } | |
2874 | ||
a685723c DV |
2875 | // Array of the column indices which contain data (and not annotations). |
2876 | var colIdx = []; | |
2877 | var annotationCols = {}; // data index -> [annotation cols] | |
2878 | var hasAnnotations = false; | |
2879 | for (var i = 1; i < cols; i++) { | |
2880 | var type = data.getColumnType(i); | |
2881 | if (type == 'number') { | |
2882 | colIdx.push(i); | |
2883 | } else if (type == 'string' && this.attr_('displayAnnotations')) { | |
2884 | // This is OK -- it's an annotation column. | |
2885 | var dataIdx = colIdx[colIdx.length - 1]; | |
2886 | if (!annotationCols.hasOwnProperty(dataIdx)) { | |
2887 | annotationCols[dataIdx] = [i]; | |
2888 | } else { | |
2889 | annotationCols[dataIdx].push(i); | |
2890 | } | |
2891 | hasAnnotations = true; | |
2892 | } else { | |
2893 | this.error("Only 'number' is supported as a dependent type with Gviz." + | |
2894 | " 'string' is only supported if displayAnnotations is true"); | |
2895 | } | |
2896 | } | |
2897 | ||
2898 | // Read column labels | |
2899 | // TODO(danvk): add support back for errorBars | |
2900 | var labels = [data.getColumnLabel(0)]; | |
2901 | for (var i = 0; i < colIdx.length; i++) { | |
2902 | labels.push(data.getColumnLabel(colIdx[i])); | |
f9348814 | 2903 | if (this.attr_("errorBars")) i += 1; |
a685723c DV |
2904 | } |
2905 | this.attrs_.labels = labels; | |
2906 | cols = labels.length; | |
2907 | ||
79420a1e | 2908 | var ret = []; |
987840a2 | 2909 | var outOfOrder = false; |
a685723c | 2910 | var annotations = []; |
79420a1e DV |
2911 | for (var i = 0; i < rows; i++) { |
2912 | var row = []; | |
debe4434 DV |
2913 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
2914 | data.getValue(i, 0) === null) { | |
129569a5 FD |
2915 | this.warn("Ignoring row " + i + |
2916 | " of DataTable because of undefined or null first column."); | |
debe4434 DV |
2917 | continue; |
2918 | } | |
2919 | ||
c21d2c2d | 2920 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
2921 | row.push(data.getValue(i, 0).getTime()); |
2922 | } else { | |
2923 | row.push(data.getValue(i, 0)); | |
2924 | } | |
3e3f84e4 | 2925 | if (!this.attr_("errorBars")) { |
a685723c DV |
2926 | for (var j = 0; j < colIdx.length; j++) { |
2927 | var col = colIdx[j]; | |
2928 | row.push(data.getValue(i, col)); | |
2929 | if (hasAnnotations && | |
2930 | annotationCols.hasOwnProperty(col) && | |
2931 | data.getValue(i, annotationCols[col][0]) != null) { | |
2932 | var ann = {}; | |
2933 | ann.series = data.getColumnLabel(col); | |
2934 | ann.xval = row[0]; | |
2935 | ann.shortText = String.fromCharCode(65 /* A */ + annotations.length) | |
2936 | ann.text = ''; | |
2937 | for (var k = 0; k < annotationCols[col].length; k++) { | |
2938 | if (k) ann.text += "\n"; | |
2939 | ann.text += data.getValue(i, annotationCols[col][k]); | |
2940 | } | |
2941 | annotations.push(ann); | |
2942 | } | |
3e3f84e4 DV |
2943 | } |
2944 | } else { | |
2945 | for (var j = 0; j < cols - 1; j++) { | |
2946 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); | |
2947 | } | |
79420a1e | 2948 | } |
987840a2 DV |
2949 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
2950 | outOfOrder = true; | |
2951 | } | |
1f7f664b DV |
2952 | |
2953 | // Strip out infinities, which give dygraphs problems later on. | |
2954 | for (var j = 0; j < row.length; j++) { | |
2955 | if (!isFinite(row[j])) row[j] = null; | |
2956 | } | |
243d96e8 | 2957 | ret.push(row); |
79420a1e | 2958 | } |
987840a2 DV |
2959 | |
2960 | if (outOfOrder) { | |
2961 | this.warn("DataTable is out of order; order it correctly to speed loading."); | |
2962 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2963 | } | |
a685723c DV |
2964 | this.rawData_ = ret; |
2965 | ||
2966 | if (annotations.length > 0) { | |
2967 | this.setAnnotations(annotations, true); | |
2968 | } | |
79420a1e DV |
2969 | } |
2970 | ||
24e5350c | 2971 | // These functions are all based on MochiKit. |
fc80a396 DV |
2972 | Dygraph.update = function (self, o) { |
2973 | if (typeof(o) != 'undefined' && o !== null) { | |
2974 | for (var k in o) { | |
85b99f0b DV |
2975 | if (o.hasOwnProperty(k)) { |
2976 | self[k] = o[k]; | |
2977 | } | |
fc80a396 DV |
2978 | } |
2979 | } | |
2980 | return self; | |
2981 | }; | |
2982 | ||
2dda3850 DV |
2983 | Dygraph.isArrayLike = function (o) { |
2984 | var typ = typeof(o); | |
2985 | if ( | |
c21d2c2d | 2986 | (typ != 'object' && !(typ == 'function' && |
2dda3850 DV |
2987 | typeof(o.item) == 'function')) || |
2988 | o === null || | |
2989 | typeof(o.length) != 'number' || | |
2990 | o.nodeType === 3 | |
2991 | ) { | |
2992 | return false; | |
2993 | } | |
2994 | return true; | |
2995 | }; | |
2996 | ||
2997 | Dygraph.isDateLike = function (o) { | |
2998 | if (typeof(o) != "object" || o === null || | |
2999 | typeof(o.getTime) != 'function') { | |
3000 | return false; | |
3001 | } | |
3002 | return true; | |
3003 | }; | |
3004 | ||
e3ab7b40 DV |
3005 | Dygraph.clone = function(o) { |
3006 | // TODO(danvk): figure out how MochiKit's version works | |
3007 | var r = []; | |
3008 | for (var i = 0; i < o.length; i++) { | |
3009 | if (Dygraph.isArrayLike(o[i])) { | |
3010 | r.push(Dygraph.clone(o[i])); | |
3011 | } else { | |
3012 | r.push(o[i]); | |
3013 | } | |
3014 | } | |
3015 | return r; | |
24e5350c DV |
3016 | }; |
3017 | ||
2dda3850 | 3018 | |
79420a1e | 3019 | /** |
6a1aa64f DV |
3020 | * Get the CSV data. If it's in a function, call that function. If it's in a |
3021 | * file, do an XMLHttpRequest to get it. | |
3022 | * @private | |
3023 | */ | |
285a6bda | 3024 | Dygraph.prototype.start_ = function() { |
6a1aa64f | 3025 | if (typeof this.file_ == 'function') { |
285a6bda | 3026 | // CSV string. Pretend we got it via XHR. |
6a1aa64f | 3027 | this.loadedEvent_(this.file_()); |
2dda3850 | 3028 | } else if (Dygraph.isArrayLike(this.file_)) { |
285a6bda | 3029 | this.rawData_ = this.parseArray_(this.file_); |
26ca7938 | 3030 | this.predraw_(); |
79420a1e DV |
3031 | } else if (typeof this.file_ == 'object' && |
3032 | typeof this.file_.getColumnRange == 'function') { | |
3033 | // must be a DataTable from gviz. | |
a685723c | 3034 | this.parseDataTable_(this.file_); |
26ca7938 | 3035 | this.predraw_(); |
285a6bda DV |
3036 | } else if (typeof this.file_ == 'string') { |
3037 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. | |
3038 | if (this.file_.indexOf('\n') >= 0) { | |
3039 | this.loadedEvent_(this.file_); | |
3040 | } else { | |
3041 | var req = new XMLHttpRequest(); | |
3042 | var caller = this; | |
3043 | req.onreadystatechange = function () { | |
3044 | if (req.readyState == 4) { | |
3045 | if (req.status == 200) { | |
3046 | caller.loadedEvent_(req.responseText); | |
3047 | } | |
6a1aa64f | 3048 | } |
285a6bda | 3049 | }; |
6a1aa64f | 3050 | |
285a6bda DV |
3051 | req.open("GET", this.file_, true); |
3052 | req.send(null); | |
3053 | } | |
3054 | } else { | |
3055 | this.error("Unknown data format: " + (typeof this.file_)); | |
6a1aa64f DV |
3056 | } |
3057 | }; | |
3058 | ||
3059 | /** | |
3060 | * Changes various properties of the graph. These can include: | |
3061 | * <ul> | |
3062 | * <li>file: changes the source data for the graph</li> | |
3063 | * <li>errorBars: changes whether the data contains stddev</li> | |
3064 | * </ul> | |
3065 | * @param {Object} attrs The new properties and values | |
3066 | */ | |
285a6bda DV |
3067 | Dygraph.prototype.updateOptions = function(attrs) { |
3068 | // TODO(danvk): this is a mess. Rethink this function. | |
c65f2303 | 3069 | if ('rollPeriod' in attrs) { |
6a1aa64f DV |
3070 | this.rollPeriod_ = attrs.rollPeriod; |
3071 | } | |
c65f2303 | 3072 | if ('dateWindow' in attrs) { |
6a1aa64f DV |
3073 | this.dateWindow_ = attrs.dateWindow; |
3074 | } | |
450fe64b DV |
3075 | |
3076 | // TODO(danvk): validate per-series options. | |
46dde5f9 DV |
3077 | // Supported: |
3078 | // strokeWidth | |
3079 | // pointSize | |
3080 | // drawPoints | |
3081 | // highlightCircleSize | |
450fe64b | 3082 | |
fc80a396 | 3083 | Dygraph.update(this.user_attrs_, attrs); |
87bb7958 | 3084 | Dygraph.update(this.renderOptions_, attrs); |
285a6bda DV |
3085 | |
3086 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
3087 | ||
3088 | // TODO(danvk): this doesn't match the constructor logic | |
3089 | this.layout_.updateOptions({ 'errorBars': this.attr_("errorBars") }); | |
5e50289f | 3090 | if (attrs['file']) { |
6a1aa64f DV |
3091 | this.file_ = attrs['file']; |
3092 | this.start_(); | |
3093 | } else { | |
26ca7938 | 3094 | this.predraw_(); |
6a1aa64f DV |
3095 | } |
3096 | }; | |
3097 | ||
3098 | /** | |
697e70b2 DV |
3099 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
3100 | * containing div (which has presumably changed size since the dygraph was | |
3101 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
3102 | * |
3103 | * This is far more efficient than destroying and re-instantiating a | |
3104 | * Dygraph, since it doesn't have to reparse the underlying data. | |
3105 | * | |
697e70b2 DV |
3106 | * @param {Number} width Width (in pixels) |
3107 | * @param {Number} height Height (in pixels) | |
3108 | */ | |
3109 | Dygraph.prototype.resize = function(width, height) { | |
e8c7ef86 DV |
3110 | if (this.resize_lock) { |
3111 | return; | |
3112 | } | |
3113 | this.resize_lock = true; | |
3114 | ||
697e70b2 DV |
3115 | if ((width === null) != (height === null)) { |
3116 | this.warn("Dygraph.resize() should be called with zero parameters or " + | |
3117 | "two non-NULL parameters. Pretending it was zero."); | |
3118 | width = height = null; | |
3119 | } | |
3120 | ||
b16e6369 | 3121 | // TODO(danvk): there should be a clear() method. |
697e70b2 | 3122 | this.maindiv_.innerHTML = ""; |
b16e6369 DV |
3123 | this.attrs_.labelsDiv = null; |
3124 | ||
697e70b2 DV |
3125 | if (width) { |
3126 | this.maindiv_.style.width = width + "px"; | |
3127 | this.maindiv_.style.height = height + "px"; | |
3128 | this.width_ = width; | |
3129 | this.height_ = height; | |
3130 | } else { | |
3131 | this.width_ = this.maindiv_.offsetWidth; | |
3132 | this.height_ = this.maindiv_.offsetHeight; | |
3133 | } | |
3134 | ||
3135 | this.createInterface_(); | |
26ca7938 | 3136 | this.predraw_(); |
e8c7ef86 DV |
3137 | |
3138 | this.resize_lock = false; | |
697e70b2 DV |
3139 | }; |
3140 | ||
3141 | /** | |
6a1aa64f DV |
3142 | * Adjusts the number of days in the rolling average. Updates the graph to |
3143 | * reflect the new averaging period. | |
3144 | * @param {Number} length Number of days over which to average the data. | |
3145 | */ | |
285a6bda | 3146 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f | 3147 | this.rollPeriod_ = length; |
26ca7938 | 3148 | this.predraw_(); |
6a1aa64f | 3149 | }; |
540d00f1 | 3150 | |
f8cfec73 | 3151 | /** |
1cf11047 DV |
3152 | * Returns a boolean array of visibility statuses. |
3153 | */ | |
3154 | Dygraph.prototype.visibility = function() { | |
3155 | // Do lazy-initialization, so that this happens after we know the number of | |
3156 | // data series. | |
3157 | if (!this.attr_("visibility")) { | |
f38dec01 | 3158 | this.attrs_["visibility"] = []; |
1cf11047 DV |
3159 | } |
3160 | while (this.attr_("visibility").length < this.rawData_[0].length - 1) { | |
f38dec01 | 3161 | this.attr_("visibility").push(true); |
1cf11047 DV |
3162 | } |
3163 | return this.attr_("visibility"); | |
3164 | }; | |
3165 | ||
3166 | /** | |
3167 | * Changes the visiblity of a series. | |
3168 | */ | |
3169 | Dygraph.prototype.setVisibility = function(num, value) { | |
3170 | var x = this.visibility(); | |
a6c109c1 | 3171 | if (num < 0 || num >= x.length) { |
1cf11047 DV |
3172 | this.warn("invalid series number in setVisibility: " + num); |
3173 | } else { | |
3174 | x[num] = value; | |
26ca7938 | 3175 | this.predraw_(); |
1cf11047 DV |
3176 | } |
3177 | }; | |
3178 | ||
3179 | /** | |
5c528fa2 DV |
3180 | * Update the list of annotations and redraw the chart. |
3181 | */ | |
a685723c | 3182 | Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { |
3c51ab74 DV |
3183 | // Only add the annotation CSS rule once we know it will be used. |
3184 | Dygraph.addAnnotationRule(); | |
5c528fa2 DV |
3185 | this.annotations_ = ann; |
3186 | this.layout_.setAnnotations(this.annotations_); | |
a685723c | 3187 | if (!suppressDraw) { |
26ca7938 | 3188 | this.predraw_(); |
a685723c | 3189 | } |
5c528fa2 DV |
3190 | }; |
3191 | ||
3192 | /** | |
3193 | * Return the list of annotations. | |
3194 | */ | |
3195 | Dygraph.prototype.annotations = function() { | |
3196 | return this.annotations_; | |
3197 | }; | |
3198 | ||
46dde5f9 DV |
3199 | /** |
3200 | * Get the index of a series (column) given its name. The first column is the | |
3201 | * x-axis, so the data series start with index 1. | |
3202 | */ | |
3203 | Dygraph.prototype.indexFromSetName = function(name) { | |
3204 | var labels = this.attr_("labels"); | |
3205 | for (var i = 0; i < labels.length; i++) { | |
3206 | if (labels[i] == name) return i; | |
3207 | } | |
3208 | return null; | |
3209 | }; | |
3210 | ||
5c528fa2 DV |
3211 | Dygraph.addAnnotationRule = function() { |
3212 | if (Dygraph.addedAnnotationCSS) return; | |
3213 | ||
5c528fa2 DV |
3214 | var rule = "border: 1px solid black; " + |
3215 | "background-color: white; " + | |
3216 | "text-align: center;"; | |
22186871 DV |
3217 | |
3218 | var styleSheetElement = document.createElement("style"); | |
3219 | styleSheetElement.type = "text/css"; | |
3220 | document.getElementsByTagName("head")[0].appendChild(styleSheetElement); | |
3221 | ||
3222 | // Find the first style sheet that we can access. | |
3223 | // We may not add a rule to a style sheet from another domain for security | |
3224 | // reasons. This sometimes comes up when using gviz, since the Google gviz JS | |
3225 | // adds its own style sheets from google.com. | |
3226 | for (var i = 0; i < document.styleSheets.length; i++) { | |
3227 | if (document.styleSheets[i].disabled) continue; | |
3228 | var mysheet = document.styleSheets[i]; | |
3229 | try { | |
3230 | if (mysheet.insertRule) { // Firefox | |
3231 | var idx = mysheet.cssRules ? mysheet.cssRules.length : 0; | |
3232 | mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", idx); | |
3233 | } else if (mysheet.addRule) { // IE | |
3234 | mysheet.addRule(".dygraphDefaultAnnotation", rule); | |
3235 | } | |
3236 | Dygraph.addedAnnotationCSS = true; | |
3237 | return; | |
3238 | } catch(err) { | |
3239 | // Was likely a security exception. | |
3240 | } | |
5c528fa2 DV |
3241 | } |
3242 | ||
22186871 | 3243 | this.warn("Unable to add default annotation CSS rule; display may be off."); |
5c528fa2 DV |
3244 | } |
3245 | ||
3246 | /** | |
f8cfec73 DV |
3247 | * Create a new canvas element. This is more complex than a simple |
3248 | * document.createElement("canvas") because of IE and excanvas. | |
3249 | */ | |
3250 | Dygraph.createCanvas = function() { | |
3251 | var canvas = document.createElement("canvas"); | |
3252 | ||
3253 | isIE = (/MSIE/.test(navigator.userAgent) && !window.opera); | |
8b8f2d59 | 3254 | if (isIE && (typeof(G_vmlCanvasManager) != 'undefined')) { |
f8cfec73 DV |
3255 | canvas = G_vmlCanvasManager.initElement(canvas); |
3256 | } | |
3257 | ||
3258 | return canvas; | |
3259 | }; | |
3260 | ||
540d00f1 DV |
3261 | |
3262 | /** | |
285a6bda | 3263 | * A wrapper around Dygraph that implements the gviz API. |
540d00f1 DV |
3264 | * @param {Object} container The DOM object the visualization should live in. |
3265 | */ | |
285a6bda | 3266 | Dygraph.GVizChart = function(container) { |
540d00f1 DV |
3267 | this.container = container; |
3268 | } | |
3269 | ||
285a6bda | 3270 | Dygraph.GVizChart.prototype.draw = function(data, options) { |
c91f4ae8 DV |
3271 | // Clear out any existing dygraph. |
3272 | // TODO(danvk): would it make more sense to simply redraw using the current | |
3273 | // date_graph object? | |
540d00f1 | 3274 | this.container.innerHTML = ''; |
c91f4ae8 DV |
3275 | if (typeof(this.date_graph) != 'undefined') { |
3276 | this.date_graph.destroy(); | |
3277 | } | |
3278 | ||
285a6bda | 3279 | this.date_graph = new Dygraph(this.container, data, options); |
540d00f1 | 3280 | } |
285a6bda | 3281 | |
239c712d NAG |
3282 | /** |
3283 | * Google charts compatible setSelection | |
50360fd0 | 3284 | * Only row selection is supported, all points in the row will be highlighted |
239c712d NAG |
3285 | * @param {Array} array of the selected cells |
3286 | * @public | |
3287 | */ | |
3288 | Dygraph.GVizChart.prototype.setSelection = function(selection_array) { | |
3289 | var row = false; | |
3290 | if (selection_array.length) { | |
3291 | row = selection_array[0].row; | |
3292 | } | |
3293 | this.date_graph.setSelection(row); | |
3294 | } | |
3295 | ||
103b7292 NAG |
3296 | /** |
3297 | * Google charts compatible getSelection implementation | |
3298 | * @return {Array} array of the selected cells | |
3299 | * @public | |
3300 | */ | |
3301 | Dygraph.GVizChart.prototype.getSelection = function() { | |
3302 | var selection = []; | |
50360fd0 | 3303 | |
103b7292 | 3304 | var row = this.date_graph.getSelection(); |
50360fd0 | 3305 | |
103b7292 | 3306 | if (row < 0) return selection; |
50360fd0 | 3307 | |
103b7292 NAG |
3308 | col = 1; |
3309 | for (var i in this.date_graph.layout_.datasets) { | |
3310 | selection.push({row: row, column: col}); | |
3311 | col++; | |
3312 | } | |
3313 | ||
3314 | return selection; | |
3315 | } | |
3316 | ||
285a6bda DV |
3317 | // Older pages may still use this name. |
3318 | DateGraph = Dygraph; |