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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 | ||
727439b4 | 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 | |
45f2c689 | 201 | // Zoomed indicators - These indicate when the graph has been zoomed and on what axis. |
57baab03 NN |
202 | this.zoomed_x_ = false; |
203 | this.zoomed_y_ = false; | |
45f2c689 | 204 | |
f7d6278e DV |
205 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
206 | // div, then only one will be drawn. | |
207 | div.innerHTML = ""; | |
208 | ||
c21d2c2d | 209 | // If the div isn't already sized then inherit from our attrs or |
210 | // give it a default size. | |
285a6bda | 211 | if (div.style.width == '') { |
ddd1b11f | 212 | div.style.width = (attrs.width || Dygraph.DEFAULT_WIDTH) + "px"; |
285a6bda DV |
213 | } |
214 | if (div.style.height == '') { | |
ddd1b11f | 215 | div.style.height = (attrs.height || Dygraph.DEFAULT_HEIGHT) + "px"; |
32988383 | 216 | } |
285a6bda DV |
217 | this.width_ = parseInt(div.style.width, 10); |
218 | this.height_ = parseInt(div.style.height, 10); | |
c21d2c2d | 219 | // The div might have been specified as percent of the current window size, |
220 | // convert that to an appropriate number of pixels. | |
221 | if (div.style.width.indexOf("%") == div.style.width.length - 1) { | |
c6f45033 | 222 | this.width_ = div.offsetWidth; |
c21d2c2d | 223 | } |
224 | if (div.style.height.indexOf("%") == div.style.height.length - 1) { | |
c6f45033 | 225 | this.height_ = div.offsetHeight; |
c21d2c2d | 226 | } |
32988383 | 227 | |
10a6456d DV |
228 | if (this.width_ == 0) { |
229 | this.error("dygraph has zero width. Please specify a width in pixels."); | |
230 | } | |
231 | if (this.height_ == 0) { | |
232 | this.error("dygraph has zero height. Please specify a height in pixels."); | |
233 | } | |
234 | ||
344ba8c0 | 235 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
43af96e7 NK |
236 | if (attrs['stackedGraph']) { |
237 | attrs['fillGraph'] = true; | |
238 | // TODO(nikhilk): Add any other stackedGraph checks here. | |
239 | } | |
240 | ||
285a6bda DV |
241 | // Dygraphs has many options, some of which interact with one another. |
242 | // To keep track of everything, we maintain two sets of options: | |
243 | // | |
c21d2c2d | 244 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
245 | // this.attrs_ defaults, options derived from user_attrs_, data. |
246 | // | |
247 | // Options are then accessed this.attr_('attr'), which first looks at | |
248 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
249 | // defaults without overriding behavior that the user specifically asks for. | |
250 | this.user_attrs_ = {}; | |
fc80a396 | 251 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 252 | |
285a6bda | 253 | this.attrs_ = {}; |
fc80a396 | 254 | Dygraph.update(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 255 | |
16269f6e | 256 | this.boundaryIds_ = []; |
6a1aa64f | 257 | |
285a6bda DV |
258 | // Make a note of whether labels will be pulled from the CSV file. |
259 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
6a1aa64f DV |
260 | |
261 | // Create the containing DIV and other interactive elements | |
262 | this.createInterface_(); | |
263 | ||
738fc797 | 264 | this.start_(); |
6a1aa64f DV |
265 | }; |
266 | ||
995b9973 | 267 | // Axis is an optional parameter. Can be set to 'x' or 'y'. |
57baab03 NN |
268 | Dygraph.prototype.isZoomed = function(axis) { |
269 | if (axis == null) return this.zoomed_x_ || this.zoomed_y_; | |
270 | if (axis == 'x') return this.zoomed_x_; | |
271 | if (axis == 'y') return this.zoomed_y_; | |
272 | throw "axis parameter to Dygraph.isZoomed must be missing, 'x' or 'y'."; | |
273 | }; | |
274 | ||
22bd1dfb RK |
275 | Dygraph.prototype.toString = function() { |
276 | var maindiv = this.maindiv_; | |
277 | var id = (maindiv && maindiv.id) ? maindiv.id : maindiv | |
278 | return "[Dygraph " + id + "]"; | |
279 | } | |
280 | ||
227b93cc DV |
281 | Dygraph.prototype.attr_ = function(name, seriesName) { |
282 | if (seriesName && | |
283 | typeof(this.user_attrs_[seriesName]) != 'undefined' && | |
284 | this.user_attrs_[seriesName] != null && | |
285 | typeof(this.user_attrs_[seriesName][name]) != 'undefined') { | |
286 | return this.user_attrs_[seriesName][name]; | |
450fe64b | 287 | } else if (typeof(this.user_attrs_[name]) != 'undefined') { |
285a6bda DV |
288 | return this.user_attrs_[name]; |
289 | } else if (typeof(this.attrs_[name]) != 'undefined') { | |
290 | return this.attrs_[name]; | |
291 | } else { | |
292 | return null; | |
293 | } | |
294 | }; | |
295 | ||
296 | // TODO(danvk): any way I can get the line numbers to be this.warn call? | |
297 | Dygraph.prototype.log = function(severity, message) { | |
298 | if (typeof(console) != 'undefined') { | |
299 | switch (severity) { | |
300 | case Dygraph.DEBUG: | |
301 | console.debug('dygraphs: ' + message); | |
302 | break; | |
303 | case Dygraph.INFO: | |
304 | console.info('dygraphs: ' + message); | |
305 | break; | |
306 | case Dygraph.WARNING: | |
307 | console.warn('dygraphs: ' + message); | |
308 | break; | |
309 | case Dygraph.ERROR: | |
310 | console.error('dygraphs: ' + message); | |
311 | break; | |
312 | } | |
313 | } | |
314 | } | |
315 | Dygraph.prototype.info = function(message) { | |
316 | this.log(Dygraph.INFO, message); | |
317 | } | |
318 | Dygraph.prototype.warn = function(message) { | |
319 | this.log(Dygraph.WARNING, message); | |
320 | } | |
321 | Dygraph.prototype.error = function(message) { | |
322 | this.log(Dygraph.ERROR, message); | |
323 | } | |
324 | ||
6a1aa64f DV |
325 | /** |
326 | * Returns the current rolling period, as set by the user or an option. | |
327 | * @return {Number} The number of days in the rolling window | |
328 | */ | |
285a6bda | 329 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 330 | return this.rollPeriod_; |
76171648 DV |
331 | }; |
332 | ||
599fb4ad DV |
333 | /** |
334 | * Returns the currently-visible x-range. This can be affected by zooming, | |
335 | * panning or a call to updateOptions. | |
336 | * Returns a two-element array: [left, right]. | |
337 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
338 | */ | |
339 | Dygraph.prototype.xAxisRange = function() { | |
340 | if (this.dateWindow_) return this.dateWindow_; | |
341 | ||
342 | // The entire chart is visible. | |
343 | var left = this.rawData_[0][0]; | |
344 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
345 | return [left, right]; | |
346 | }; | |
347 | ||
3230c662 | 348 | /** |
d58ae307 DV |
349 | * Returns the currently-visible y-range for an axis. This can be affected by |
350 | * zooming, panning or a call to updateOptions. Axis indices are zero-based. If | |
351 | * called with no arguments, returns the range of the first axis. | |
3230c662 DV |
352 | * Returns a two-element array: [bottom, top]. |
353 | */ | |
d58ae307 | 354 | Dygraph.prototype.yAxisRange = function(idx) { |
d63e6799 | 355 | if (typeof(idx) == "undefined") idx = 0; |
d58ae307 DV |
356 | if (idx < 0 || idx >= this.axes_.length) return null; |
357 | return [ this.axes_[idx].computedValueRange[0], | |
358 | this.axes_[idx].computedValueRange[1] ]; | |
359 | }; | |
360 | ||
361 | /** | |
362 | * Returns the currently-visible y-ranges for each axis. This can be affected by | |
363 | * zooming, panning, calls to updateOptions, etc. | |
364 | * Returns an array of [bottom, top] pairs, one for each y-axis. | |
365 | */ | |
366 | Dygraph.prototype.yAxisRanges = function() { | |
367 | var ret = []; | |
368 | for (var i = 0; i < this.axes_.length; i++) { | |
369 | ret.push(this.yAxisRange(i)); | |
370 | } | |
371 | return ret; | |
3230c662 DV |
372 | }; |
373 | ||
d58ae307 | 374 | // TODO(danvk): use these functions throughout dygraphs. |
3230c662 DV |
375 | /** |
376 | * Convert from data coordinates to canvas/div X/Y coordinates. | |
d58ae307 DV |
377 | * If specified, do this conversion for the coordinate system of a particular |
378 | * axis. Uses the first axis by default. | |
3230c662 | 379 | * Returns a two-element array: [X, Y] |
ff022deb | 380 | * |
0747928a | 381 | * Note: use toDomXCoord instead of toDomCoords(x, null) and use toDomYCoord |
ff022deb | 382 | * instead of toDomCoords(null, y, axis). |
3230c662 | 383 | */ |
d58ae307 | 384 | Dygraph.prototype.toDomCoords = function(x, y, axis) { |
ff022deb RK |
385 | return [ this.toDomXCoord(x), this.toDomYCoord(y, axis) ]; |
386 | }; | |
387 | ||
388 | /** | |
389 | * Convert from data x coordinates to canvas/div X coordinate. | |
390 | * If specified, do this conversion for the coordinate system of a particular | |
0037b2a4 RK |
391 | * axis. |
392 | * Returns a single value or null if x is null. | |
ff022deb RK |
393 | */ |
394 | Dygraph.prototype.toDomXCoord = function(x) { | |
395 | if (x == null) { | |
396 | return null; | |
397 | }; | |
398 | ||
3230c662 | 399 | var area = this.plotter_.area; |
ff022deb RK |
400 | var xRange = this.xAxisRange(); |
401 | return area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; | |
402 | } | |
3230c662 | 403 | |
ff022deb RK |
404 | /** |
405 | * Convert from data x coordinates to canvas/div Y coordinate and optional | |
406 | * axis. Uses the first axis by default. | |
407 | * | |
408 | * returns a single value or null if y is null. | |
409 | */ | |
410 | Dygraph.prototype.toDomYCoord = function(y, axis) { | |
0747928a | 411 | var pct = this.toPercentYCoord(y, axis); |
3230c662 | 412 | |
ff022deb RK |
413 | if (pct == null) { |
414 | return null; | |
415 | } | |
e4416fb9 | 416 | var area = this.plotter_.area; |
ff022deb RK |
417 | return area.y + pct * area.h; |
418 | } | |
3230c662 DV |
419 | |
420 | /** | |
421 | * Convert from canvas/div coords to data coordinates. | |
d58ae307 DV |
422 | * If specified, do this conversion for the coordinate system of a particular |
423 | * axis. Uses the first axis by default. | |
ff022deb RK |
424 | * Returns a two-element array: [X, Y]. |
425 | * | |
0747928a | 426 | * Note: use toDataXCoord instead of toDataCoords(x, null) and use toDataYCoord |
ff022deb | 427 | * instead of toDataCoords(null, y, axis). |
3230c662 | 428 | */ |
d58ae307 | 429 | Dygraph.prototype.toDataCoords = function(x, y, axis) { |
ff022deb RK |
430 | return [ this.toDataXCoord(x), this.toDataYCoord(y, axis) ]; |
431 | }; | |
432 | ||
433 | /** | |
434 | * Convert from canvas/div x coordinate to data coordinate. | |
435 | * | |
436 | * If x is null, this returns null. | |
437 | */ | |
438 | Dygraph.prototype.toDataXCoord = function(x) { | |
439 | if (x == null) { | |
440 | return null; | |
3230c662 DV |
441 | } |
442 | ||
ff022deb RK |
443 | var area = this.plotter_.area; |
444 | var xRange = this.xAxisRange(); | |
445 | return xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); | |
446 | }; | |
447 | ||
448 | /** | |
449 | * Convert from canvas/div y coord to value. | |
450 | * | |
451 | * If y is null, this returns null. | |
452 | * if axis is null, this uses the first axis. | |
453 | */ | |
454 | Dygraph.prototype.toDataYCoord = function(y, axis) { | |
455 | if (y == null) { | |
456 | return null; | |
3230c662 DV |
457 | } |
458 | ||
ff022deb RK |
459 | var area = this.plotter_.area; |
460 | var yRange = this.yAxisRange(axis); | |
461 | ||
b70247dc RK |
462 | if (typeof(axis) == "undefined") axis = 0; |
463 | if (!this.axes_[axis].logscale) { | |
ff022deb RK |
464 | return yRange[0] + (area.h - y) / area.h * (yRange[1] - yRange[0]); |
465 | } else { | |
466 | // Computing the inverse of toDomCoord. | |
467 | var pct = (y - area.y) / area.h | |
468 | ||
469 | // Computing the inverse of toPercentYCoord. The function was arrived at with | |
470 | // the following steps: | |
471 | // | |
472 | // Original calcuation: | |
d59b6f34 | 473 | // pct = (logr1 - Dygraph.log10(y)) / (logr1 - Dygraph.log10(yRange[0])); |
ff022deb RK |
474 | // |
475 | // Move denominator to both sides: | |
d59b6f34 | 476 | // pct * (logr1 - Dygraph.log10(yRange[0])) = logr1 - Dygraph.log10(y); |
ff022deb RK |
477 | // |
478 | // subtract logr1, and take the negative value. | |
d59b6f34 | 479 | // logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))) = Dygraph.log10(y); |
ff022deb RK |
480 | // |
481 | // Swap both sides of the equation, and we can compute the log of the | |
482 | // return value. Which means we just need to use that as the exponent in | |
483 | // e^exponent. | |
d59b6f34 | 484 | // Dygraph.log10(y) = logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))); |
ff022deb | 485 | |
d59b6f34 RK |
486 | var logr1 = Dygraph.log10(yRange[1]); |
487 | var exponent = logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))); | |
488 | var value = Math.pow(Dygraph.LOG_SCALE, exponent); | |
ff022deb RK |
489 | return value; |
490 | } | |
3230c662 DV |
491 | }; |
492 | ||
e99fde05 | 493 | /** |
ff022deb RK |
494 | * Converts a y for an axis to a percentage from the top to the |
495 | * bottom of the div. | |
496 | * | |
497 | * If the coordinate represents a value visible on the canvas, then | |
498 | * the value will be between 0 and 1, where 0 is the top of the canvas. | |
499 | * However, this method will return values outside the range, as | |
500 | * values can fall outside the canvas. | |
501 | * | |
502 | * If y is null, this returns null. | |
503 | * if axis is null, this uses the first axis. | |
504 | */ | |
505 | Dygraph.prototype.toPercentYCoord = function(y, axis) { | |
506 | if (y == null) { | |
507 | return null; | |
508 | } | |
7d0e7a0d | 509 | if (typeof(axis) == "undefined") axis = 0; |
ff022deb RK |
510 | |
511 | var area = this.plotter_.area; | |
512 | var yRange = this.yAxisRange(axis); | |
513 | ||
514 | var pct; | |
7d0e7a0d | 515 | if (!this.axes_[axis].logscale) { |
ff022deb RK |
516 | // yrange[1] - y is unit distance from the bottom. |
517 | // yrange[1] - yrange[0] is the scale of the range. | |
518 | // (yRange[1] - y) / (yRange[1] - yRange[0]) is the % from the bottom. | |
519 | pct = (yRange[1] - y) / (yRange[1] - yRange[0]); | |
520 | } else { | |
d59b6f34 RK |
521 | var logr1 = Dygraph.log10(yRange[1]); |
522 | pct = (logr1 - Dygraph.log10(y)) / (logr1 - Dygraph.log10(yRange[0])); | |
ff022deb RK |
523 | } |
524 | return pct; | |
525 | } | |
526 | ||
527 | /** | |
e99fde05 DV |
528 | * Returns the number of columns (including the independent variable). |
529 | */ | |
530 | Dygraph.prototype.numColumns = function() { | |
531 | return this.rawData_[0].length; | |
532 | }; | |
533 | ||
534 | /** | |
535 | * Returns the number of rows (excluding any header/label row). | |
536 | */ | |
537 | Dygraph.prototype.numRows = function() { | |
538 | return this.rawData_.length; | |
539 | }; | |
540 | ||
541 | /** | |
542 | * Returns the value in the given row and column. If the row and column exceed | |
543 | * the bounds on the data, returns null. Also returns null if the value is | |
544 | * missing. | |
545 | */ | |
546 | Dygraph.prototype.getValue = function(row, col) { | |
547 | if (row < 0 || row > this.rawData_.length) return null; | |
548 | if (col < 0 || col > this.rawData_[row].length) return null; | |
549 | ||
550 | return this.rawData_[row][col]; | |
551 | }; | |
552 | ||
76171648 DV |
553 | Dygraph.addEvent = function(el, evt, fn) { |
554 | var normed_fn = function(e) { | |
555 | if (!e) var e = window.event; | |
556 | fn(e); | |
557 | }; | |
558 | if (window.addEventListener) { // Mozilla, Netscape, Firefox | |
559 | el.addEventListener(evt, normed_fn, false); | |
560 | } else { // IE | |
561 | el.attachEvent('on' + evt, normed_fn); | |
562 | } | |
563 | }; | |
6a1aa64f | 564 | |
ee672584 | 565 | |
ee672584 RK |
566 | // Based on the article at |
567 | // http://www.switchonthecode.com/tutorials/javascript-tutorial-the-scroll-wheel | |
ee672584 RK |
568 | Dygraph.cancelEvent = function(e) { |
569 | e = e ? e : window.event; | |
570 | if (e.stopPropagation) { | |
571 | e.stopPropagation(); | |
572 | } | |
573 | if (e.preventDefault) { | |
574 | e.preventDefault(); | |
575 | } | |
576 | e.cancelBubble = true; | |
577 | e.cancel = true; | |
578 | e.returnValue = false; | |
579 | return false; | |
580 | } | |
581 | ||
6a1aa64f | 582 | /** |
285a6bda | 583 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 584 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 585 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
586 | * @private |
587 | */ | |
285a6bda | 588 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
589 | // Create the all-enclosing graph div |
590 | var enclosing = this.maindiv_; | |
591 | ||
b0c3b730 DV |
592 | this.graphDiv = document.createElement("div"); |
593 | this.graphDiv.style.width = this.width_ + "px"; | |
594 | this.graphDiv.style.height = this.height_ + "px"; | |
595 | enclosing.appendChild(this.graphDiv); | |
596 | ||
597 | // Create the canvas for interactive parts of the chart. | |
f8cfec73 | 598 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 DV |
599 | this.canvas_.style.position = "absolute"; |
600 | this.canvas_.width = this.width_; | |
601 | this.canvas_.height = this.height_; | |
f8cfec73 DV |
602 | this.canvas_.style.width = this.width_ + "px"; // for IE |
603 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
b0c3b730 DV |
604 | |
605 | // ... and for static parts of the chart. | |
6a1aa64f | 606 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
76171648 | 607 | |
eb7bf005 EC |
608 | // The interactive parts of the graph are drawn on top of the chart. |
609 | this.graphDiv.appendChild(this.hidden_); | |
610 | this.graphDiv.appendChild(this.canvas_); | |
611 | this.mouseEventElement_ = this.canvas_; | |
612 | ||
76171648 | 613 | var dygraph = this; |
eb7bf005 | 614 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(e) { |
76171648 DV |
615 | dygraph.mouseMove_(e); |
616 | }); | |
eb7bf005 | 617 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(e) { |
76171648 DV |
618 | dygraph.mouseOut_(e); |
619 | }); | |
697e70b2 DV |
620 | |
621 | // Create the grapher | |
622 | // TODO(danvk): why does the Layout need its own set of options? | |
623 | this.layoutOptions_ = { 'xOriginIsZero': false }; | |
624 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
625 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
626 | Dygraph.update(this.layoutOptions_, { | |
627 | 'errorBars': (this.attr_("errorBars") || this.attr_("customBars")) }); | |
628 | ||
629 | this.layout_ = new DygraphLayout(this, this.layoutOptions_); | |
630 | ||
631 | // TODO(danvk): why does the Renderer need its own set of options? | |
632 | this.renderOptions_ = { colorScheme: this.colors_, | |
633 | strokeColor: null, | |
634 | axisLineWidth: Dygraph.AXIS_LINE_WIDTH }; | |
635 | Dygraph.update(this.renderOptions_, this.attrs_); | |
636 | Dygraph.update(this.renderOptions_, this.user_attrs_); | |
697e70b2 DV |
637 | |
638 | this.createStatusMessage_(); | |
697e70b2 | 639 | this.createDragInterface_(); |
4cfcc38c DV |
640 | }; |
641 | ||
642 | /** | |
643 | * Detach DOM elements in the dygraph and null out all data references. | |
644 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
645 | * usage. See, e.g., the tests/perf.html example. | |
646 | */ | |
647 | Dygraph.prototype.destroy = function() { | |
648 | var removeRecursive = function(node) { | |
649 | while (node.hasChildNodes()) { | |
650 | removeRecursive(node.firstChild); | |
651 | node.removeChild(node.firstChild); | |
652 | } | |
653 | }; | |
654 | removeRecursive(this.maindiv_); | |
655 | ||
656 | var nullOut = function(obj) { | |
657 | for (var n in obj) { | |
658 | if (typeof(obj[n]) === 'object') { | |
659 | obj[n] = null; | |
660 | } | |
661 | } | |
662 | }; | |
663 | ||
664 | // These may not all be necessary, but it can't hurt... | |
665 | nullOut(this.layout_); | |
666 | nullOut(this.plotter_); | |
667 | nullOut(this); | |
668 | }; | |
6a1aa64f DV |
669 | |
670 | /** | |
671 | * Creates the canvas containing the PlotKit graph. Only plotkit ever draws on | |
285a6bda | 672 | * this particular canvas. All Dygraph work is done on this.canvas_. |
8846615a | 673 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
674 | * @return {Object} The newly-created canvas |
675 | * @private | |
676 | */ | |
285a6bda | 677 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 | 678 | var h = Dygraph.createCanvas(); |
6a1aa64f | 679 | h.style.position = "absolute"; |
9ac5e4ae DV |
680 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
681 | // some extra area to make it easier to zoom in on the far left and far | |
682 | // right. h needs to be precisely the plot area, so that clipping occurs. | |
6a1aa64f DV |
683 | h.style.top = canvas.style.top; |
684 | h.style.left = canvas.style.left; | |
685 | h.width = this.width_; | |
686 | h.height = this.height_; | |
f8cfec73 DV |
687 | h.style.width = this.width_ + "px"; // for IE |
688 | h.style.height = this.height_ + "px"; // for IE | |
6a1aa64f DV |
689 | return h; |
690 | }; | |
691 | ||
f474c2a3 DV |
692 | // Taken from MochiKit.Color |
693 | Dygraph.hsvToRGB = function (hue, saturation, value) { | |
694 | var red; | |
695 | var green; | |
696 | var blue; | |
697 | if (saturation === 0) { | |
698 | red = value; | |
699 | green = value; | |
700 | blue = value; | |
701 | } else { | |
702 | var i = Math.floor(hue * 6); | |
703 | var f = (hue * 6) - i; | |
704 | var p = value * (1 - saturation); | |
705 | var q = value * (1 - (saturation * f)); | |
706 | var t = value * (1 - (saturation * (1 - f))); | |
707 | switch (i) { | |
708 | case 1: red = q; green = value; blue = p; break; | |
709 | case 2: red = p; green = value; blue = t; break; | |
710 | case 3: red = p; green = q; blue = value; break; | |
711 | case 4: red = t; green = p; blue = value; break; | |
712 | case 5: red = value; green = p; blue = q; break; | |
713 | case 6: // fall through | |
714 | case 0: red = value; green = t; blue = p; break; | |
715 | } | |
716 | } | |
717 | red = Math.floor(255 * red + 0.5); | |
718 | green = Math.floor(255 * green + 0.5); | |
719 | blue = Math.floor(255 * blue + 0.5); | |
720 | return 'rgb(' + red + ',' + green + ',' + blue + ')'; | |
721 | }; | |
722 | ||
723 | ||
6a1aa64f DV |
724 | /** |
725 | * Generate a set of distinct colors for the data series. This is done with a | |
726 | * color wheel. Saturation/Value are customizable, and the hue is | |
727 | * equally-spaced around the color wheel. If a custom set of colors is | |
728 | * specified, that is used instead. | |
6a1aa64f DV |
729 | * @private |
730 | */ | |
285a6bda DV |
731 | Dygraph.prototype.setColors_ = function() { |
732 | // TODO(danvk): compute this directly into this.attrs_['colorScheme'] and do | |
733 | // away with this.renderOptions_. | |
734 | var num = this.attr_("labels").length - 1; | |
6a1aa64f | 735 | this.colors_ = []; |
285a6bda DV |
736 | var colors = this.attr_('colors'); |
737 | if (!colors) { | |
738 | var sat = this.attr_('colorSaturation') || 1.0; | |
739 | var val = this.attr_('colorValue') || 0.5; | |
2aa21213 | 740 | var half = Math.ceil(num / 2); |
6a1aa64f | 741 | for (var i = 1; i <= num; i++) { |
ec1959eb | 742 | if (!this.visibility()[i-1]) continue; |
43af96e7 | 743 | // alternate colors for high contrast. |
2aa21213 | 744 | var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2); |
43af96e7 NK |
745 | var hue = (1.0 * idx/ (1 + num)); |
746 | this.colors_.push(Dygraph.hsvToRGB(hue, sat, val)); | |
6a1aa64f DV |
747 | } |
748 | } else { | |
749 | for (var i = 0; i < num; i++) { | |
ec1959eb | 750 | if (!this.visibility()[i]) continue; |
285a6bda | 751 | var colorStr = colors[i % colors.length]; |
f474c2a3 | 752 | this.colors_.push(colorStr); |
6a1aa64f DV |
753 | } |
754 | } | |
285a6bda | 755 | |
c21d2c2d | 756 | // TODO(danvk): update this w/r/t/ the new options system. |
285a6bda | 757 | this.renderOptions_.colorScheme = this.colors_; |
fc80a396 DV |
758 | Dygraph.update(this.plotter_.options, this.renderOptions_); |
759 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
760 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
6a1aa64f DV |
761 | } |
762 | ||
43af96e7 NK |
763 | /** |
764 | * Return the list of colors. This is either the list of colors passed in the | |
765 | * attributes, or the autogenerated list of rgb(r,g,b) strings. | |
766 | * @return {Array<string>} The list of colors. | |
767 | */ | |
768 | Dygraph.prototype.getColors = function() { | |
769 | return this.colors_; | |
770 | }; | |
771 | ||
5e60386d DV |
772 | // The following functions are from quirksmode.org with a modification for Safari from |
773 | // http://blog.firetree.net/2005/07/04/javascript-find-position/ | |
3df0ccf0 DV |
774 | // http://www.quirksmode.org/js/findpos.html |
775 | Dygraph.findPosX = function(obj) { | |
776 | var curleft = 0; | |
5e60386d | 777 | if(obj.offsetParent) |
50360fd0 | 778 | while(1) |
5e60386d | 779 | { |
3df0ccf0 | 780 | curleft += obj.offsetLeft; |
5e60386d DV |
781 | if(!obj.offsetParent) |
782 | break; | |
3df0ccf0 DV |
783 | obj = obj.offsetParent; |
784 | } | |
5e60386d | 785 | else if(obj.x) |
3df0ccf0 DV |
786 | curleft += obj.x; |
787 | return curleft; | |
788 | }; | |
c21d2c2d | 789 | |
3df0ccf0 DV |
790 | Dygraph.findPosY = function(obj) { |
791 | var curtop = 0; | |
5e60386d DV |
792 | if(obj.offsetParent) |
793 | while(1) | |
794 | { | |
3df0ccf0 | 795 | curtop += obj.offsetTop; |
5e60386d DV |
796 | if(!obj.offsetParent) |
797 | break; | |
3df0ccf0 DV |
798 | obj = obj.offsetParent; |
799 | } | |
5e60386d | 800 | else if(obj.y) |
3df0ccf0 DV |
801 | curtop += obj.y; |
802 | return curtop; | |
803 | }; | |
804 | ||
5e60386d | 805 | |
71a11a8e | 806 | |
6a1aa64f DV |
807 | /** |
808 | * Create the div that contains information on the selected point(s) | |
809 | * This goes in the top right of the canvas, unless an external div has already | |
810 | * been specified. | |
811 | * @private | |
812 | */ | |
fedbd797 | 813 | Dygraph.prototype.createStatusMessage_ = function() { |
814 | var userLabelsDiv = this.user_attrs_["labelsDiv"]; | |
815 | if (userLabelsDiv && null != userLabelsDiv | |
816 | && (typeof(userLabelsDiv) == "string" || userLabelsDiv instanceof String)) { | |
817 | this.user_attrs_["labelsDiv"] = document.getElementById(userLabelsDiv); | |
818 | } | |
285a6bda DV |
819 | if (!this.attr_("labelsDiv")) { |
820 | var divWidth = this.attr_('labelsDivWidth'); | |
b0c3b730 | 821 | var messagestyle = { |
6a1aa64f DV |
822 | "position": "absolute", |
823 | "fontSize": "14px", | |
824 | "zIndex": 10, | |
825 | "width": divWidth + "px", | |
826 | "top": "0px", | |
8846615a | 827 | "left": (this.width_ - divWidth - 2) + "px", |
6a1aa64f DV |
828 | "background": "white", |
829 | "textAlign": "left", | |
b0c3b730 | 830 | "overflow": "hidden"}; |
fc80a396 | 831 | Dygraph.update(messagestyle, this.attr_('labelsDivStyles')); |
b0c3b730 DV |
832 | var div = document.createElement("div"); |
833 | for (var name in messagestyle) { | |
85b99f0b DV |
834 | if (messagestyle.hasOwnProperty(name)) { |
835 | div.style[name] = messagestyle[name]; | |
836 | } | |
b0c3b730 DV |
837 | } |
838 | this.graphDiv.appendChild(div); | |
285a6bda | 839 | this.attrs_.labelsDiv = div; |
6a1aa64f DV |
840 | } |
841 | }; | |
842 | ||
843 | /** | |
0abfbd7e DV |
844 | * Position the labels div so that its right edge is flush with the right edge |
845 | * of the charting area. | |
846 | */ | |
847 | Dygraph.prototype.positionLabelsDiv_ = function() { | |
848 | // Don't touch a user-specified labelsDiv. | |
849 | if (this.user_attrs_.hasOwnProperty("labelsDiv")) return; | |
850 | ||
851 | var area = this.plotter_.area; | |
852 | var div = this.attr_("labelsDiv"); | |
8c21adcf | 853 | div.style.left = area.x + area.w - this.attr_("labelsDivWidth") - 1 + "px"; |
0abfbd7e DV |
854 | }; |
855 | ||
856 | /** | |
6a1aa64f | 857 | * Create the text box to adjust the averaging period |
6a1aa64f DV |
858 | * @private |
859 | */ | |
285a6bda | 860 | Dygraph.prototype.createRollInterface_ = function() { |
8c69de65 DV |
861 | // Create a roller if one doesn't exist already. |
862 | if (!this.roller_) { | |
863 | this.roller_ = document.createElement("input"); | |
864 | this.roller_.type = "text"; | |
865 | this.roller_.style.display = "none"; | |
866 | this.graphDiv.appendChild(this.roller_); | |
867 | } | |
868 | ||
869 | var display = this.attr_('showRoller') ? 'block' : 'none'; | |
26ca7938 | 870 | |
b0c3b730 DV |
871 | var textAttr = { "position": "absolute", |
872 | "zIndex": 10, | |
873 | "top": (this.plotter_.area.h - 25) + "px", | |
874 | "left": (this.plotter_.area.x + 1) + "px", | |
875 | "display": display | |
6a1aa64f | 876 | }; |
8c69de65 DV |
877 | this.roller_.size = "2"; |
878 | this.roller_.value = this.rollPeriod_; | |
b0c3b730 | 879 | for (var name in textAttr) { |
85b99f0b | 880 | if (textAttr.hasOwnProperty(name)) { |
8c69de65 | 881 | this.roller_.style[name] = textAttr[name]; |
85b99f0b | 882 | } |
b0c3b730 DV |
883 | } |
884 | ||
76171648 | 885 | var dygraph = this; |
8c69de65 | 886 | this.roller_.onchange = function() { dygraph.adjustRoll(dygraph.roller_.value); }; |
76171648 DV |
887 | }; |
888 | ||
889 | // These functions are taken from MochiKit.Signal | |
890 | Dygraph.pageX = function(e) { | |
891 | if (e.pageX) { | |
892 | return (!e.pageX || e.pageX < 0) ? 0 : e.pageX; | |
893 | } else { | |
894 | var de = document; | |
895 | var b = document.body; | |
896 | return e.clientX + | |
897 | (de.scrollLeft || b.scrollLeft) - | |
898 | (de.clientLeft || 0); | |
899 | } | |
900 | }; | |
901 | ||
902 | Dygraph.pageY = function(e) { | |
903 | if (e.pageY) { | |
904 | return (!e.pageY || e.pageY < 0) ? 0 : e.pageY; | |
905 | } else { | |
906 | var de = document; | |
907 | var b = document.body; | |
908 | return e.clientY + | |
909 | (de.scrollTop || b.scrollTop) - | |
910 | (de.clientTop || 0); | |
911 | } | |
912 | }; | |
6a1aa64f | 913 | |
ee672584 RK |
914 | Dygraph.prototype.dragGetX_ = function(e, context) { |
915 | return Dygraph.pageX(e) - context.px | |
916 | }; | |
e3489f4f | 917 | |
ee672584 RK |
918 | Dygraph.prototype.dragGetY_ = function(e, context) { |
919 | return Dygraph.pageY(e) - context.py | |
920 | }; | |
e3489f4f | 921 | |
885c13e4 RK |
922 | // Called in response to an interaction model operation that |
923 | // should start the default panning behavior. | |
924 | // | |
925 | // It's used in the default callback for "mousedown" operations. | |
926 | // Custom interaction model builders can use it to provide the default | |
927 | // panning behavior. | |
928 | // | |
ee672584 | 929 | Dygraph.startPan = function(event, g, context) { |
ee672584 RK |
930 | context.isPanning = true; |
931 | var xRange = g.xAxisRange(); | |
932 | context.dateRange = xRange[1] - xRange[0]; | |
ec291cbe RK |
933 | context.initialLeftmostDate = xRange[0]; |
934 | context.xUnitsPerPixel = context.dateRange / (g.plotter_.area.w - 1); | |
ee672584 RK |
935 | |
936 | // Record the range of each y-axis at the start of the drag. | |
937 | // If any axis has a valueRange or valueWindow, then we want a 2D pan. | |
938 | context.is2DPan = false; | |
939 | for (var i = 0; i < g.axes_.length; i++) { | |
940 | var axis = g.axes_[i]; | |
941 | var yRange = g.yAxisRange(i); | |
ec291cbe | 942 | // TODO(konigsberg): These values should be in |context|. |
ed898bdd RK |
943 | // In log scale, initialTopValue, dragValueRange and unitsPerPixel are log scale. |
944 | if (axis.logscale) { | |
945 | axis.initialTopValue = Dygraph.log10(yRange[1]); | |
946 | axis.dragValueRange = Dygraph.log10(yRange[1]) - Dygraph.log10(yRange[0]); | |
947 | } else { | |
948 | axis.initialTopValue = yRange[1]; | |
949 | axis.dragValueRange = yRange[1] - yRange[0]; | |
950 | } | |
ec291cbe | 951 | axis.unitsPerPixel = axis.dragValueRange / (g.plotter_.area.h - 1); |
ed898bdd RK |
952 | |
953 | // While calculating axes, set 2dpan. | |
ee672584 RK |
954 | if (axis.valueWindow || axis.valueRange) context.is2DPan = true; |
955 | } | |
ee672584 | 956 | }; |
6a1aa64f | 957 | |
885c13e4 RK |
958 | // Called in response to an interaction model operation that |
959 | // responds to an event that pans the view. | |
960 | // | |
961 | // It's used in the default callback for "mousemove" operations. | |
962 | // Custom interaction model builders can use it to provide the default | |
963 | // panning behavior. | |
964 | // | |
ee672584 RK |
965 | Dygraph.movePan = function(event, g, context) { |
966 | context.dragEndX = g.dragGetX_(event, context); | |
967 | context.dragEndY = g.dragGetY_(event, context); | |
bce01b0f | 968 | |
ec291cbe RK |
969 | var minDate = context.initialLeftmostDate - |
970 | (context.dragEndX - context.dragStartX) * context.xUnitsPerPixel; | |
ee672584 RK |
971 | var maxDate = minDate + context.dateRange; |
972 | g.dateWindow_ = [minDate, maxDate]; | |
973 | ||
974 | // y-axis scaling is automatic unless this is a full 2D pan. | |
975 | if (context.is2DPan) { | |
976 | // Adjust each axis appropriately. | |
ee672584 RK |
977 | for (var i = 0; i < g.axes_.length; i++) { |
978 | var axis = g.axes_[i]; | |
ed898bdd RK |
979 | |
980 | var pixelsDragged = context.dragEndY - context.dragStartY; | |
981 | var unitsDragged = pixelsDragged * axis.unitsPerPixel; | |
982 | ||
983 | // In log scale, maxValue and minValue are the logs of those values. | |
984 | var maxValue = axis.initialTopValue + unitsDragged; | |
ee672584 | 985 | var minValue = maxValue - axis.dragValueRange; |
ed898bdd | 986 | if (axis.logscale) { |
5db0e241 DV |
987 | axis.valueWindow = [ Math.pow(Dygraph.LOG_SCALE, minValue), |
988 | Math.pow(Dygraph.LOG_SCALE, maxValue) ]; | |
ed898bdd RK |
989 | } else { |
990 | axis.valueWindow = [ minValue, maxValue ]; | |
991 | } | |
6a1aa64f | 992 | } |
ee672584 | 993 | } |
6a1aa64f | 994 | |
ee672584 RK |
995 | g.drawGraph_(); |
996 | } | |
79b3ee42 | 997 | |
885c13e4 RK |
998 | // Called in response to an interaction model operation that |
999 | // responds to an event that ends panning. | |
1000 | // | |
1001 | // It's used in the default callback for "mouseup" operations. | |
1002 | // Custom interaction model builders can use it to provide the default | |
1003 | // panning behavior. | |
1004 | // | |
ee672584 | 1005 | Dygraph.endPan = function(event, g, context) { |
ec291cbe RK |
1006 | // TODO(konigsberg): Clear the context data from the axis. |
1007 | // TODO(konigsberg): mouseup should just delete the | |
1008 | // context object, and mousedown should create a new one. | |
ee672584 RK |
1009 | context.isPanning = false; |
1010 | context.is2DPan = false; | |
ec291cbe | 1011 | context.initialLeftmostDate = null; |
ee672584 RK |
1012 | context.dateRange = null; |
1013 | context.valueRange = null; | |
1014 | } | |
bce01b0f | 1015 | |
885c13e4 RK |
1016 | // Called in response to an interaction model operation that |
1017 | // responds to an event that starts zooming. | |
1018 | // | |
1019 | // It's used in the default callback for "mousedown" operations. | |
1020 | // Custom interaction model builders can use it to provide the default | |
1021 | // zooming behavior. | |
1022 | // | |
ee672584 RK |
1023 | Dygraph.startZoom = function(event, g, context) { |
1024 | context.isZooming = true; | |
1025 | } | |
1026 | ||
885c13e4 RK |
1027 | // Called in response to an interaction model operation that |
1028 | // responds to an event that defines zoom boundaries. | |
1029 | // | |
1030 | // It's used in the default callback for "mousemove" operations. | |
1031 | // Custom interaction model builders can use it to provide the default | |
1032 | // zooming behavior. | |
1033 | // | |
ee672584 RK |
1034 | Dygraph.moveZoom = function(event, g, context) { |
1035 | context.dragEndX = g.dragGetX_(event, context); | |
1036 | context.dragEndY = g.dragGetY_(event, context); | |
1037 | ||
1038 | var xDelta = Math.abs(context.dragStartX - context.dragEndX); | |
1039 | var yDelta = Math.abs(context.dragStartY - context.dragEndY); | |
1040 | ||
1041 | // drag direction threshold for y axis is twice as large as x axis | |
1042 | context.dragDirection = (xDelta < yDelta / 2) ? Dygraph.VERTICAL : Dygraph.HORIZONTAL; | |
1043 | ||
1044 | g.drawZoomRect_( | |
1045 | context.dragDirection, | |
1046 | context.dragStartX, | |
1047 | context.dragEndX, | |
1048 | context.dragStartY, | |
1049 | context.dragEndY, | |
1050 | context.prevDragDirection, | |
1051 | context.prevEndX, | |
1052 | context.prevEndY); | |
1053 | ||
1054 | context.prevEndX = context.dragEndX; | |
1055 | context.prevEndY = context.dragEndY; | |
1056 | context.prevDragDirection = context.dragDirection; | |
1057 | } | |
1058 | ||
885c13e4 RK |
1059 | // Called in response to an interaction model operation that |
1060 | // responds to an event that performs a zoom based on previously defined | |
1061 | // bounds.. | |
1062 | // | |
1063 | // It's used in the default callback for "mouseup" operations. | |
1064 | // Custom interaction model builders can use it to provide the default | |
1065 | // zooming behavior. | |
1066 | // | |
ee672584 RK |
1067 | Dygraph.endZoom = function(event, g, context) { |
1068 | context.isZooming = false; | |
1069 | context.dragEndX = g.dragGetX_(event, context); | |
1070 | context.dragEndY = g.dragGetY_(event, context); | |
1071 | var regionWidth = Math.abs(context.dragEndX - context.dragStartX); | |
1072 | var regionHeight = Math.abs(context.dragEndY - context.dragStartY); | |
1073 | ||
1074 | if (regionWidth < 2 && regionHeight < 2 && | |
1075 | g.lastx_ != undefined && g.lastx_ != -1) { | |
1076 | // TODO(danvk): pass along more info about the points, e.g. 'x' | |
1077 | if (g.attr_('clickCallback') != null) { | |
1078 | g.attr_('clickCallback')(event, g.lastx_, g.selPoints_); | |
1079 | } | |
1080 | if (g.attr_('pointClickCallback')) { | |
1081 | // check if the click was on a particular point. | |
1082 | var closestIdx = -1; | |
1083 | var closestDistance = 0; | |
1084 | for (var i = 0; i < g.selPoints_.length; i++) { | |
1085 | var p = g.selPoints_[i]; | |
1086 | var distance = Math.pow(p.canvasx - context.dragEndX, 2) + | |
1087 | Math.pow(p.canvasy - context.dragEndY, 2); | |
1088 | if (closestIdx == -1 || distance < closestDistance) { | |
1089 | closestDistance = distance; | |
1090 | closestIdx = i; | |
d58ae307 DV |
1091 | } |
1092 | } | |
d58ae307 | 1093 | |
ee672584 RK |
1094 | // Allow any click within two pixels of the dot. |
1095 | var radius = g.attr_('highlightCircleSize') + 2; | |
1096 | if (closestDistance <= 5 * 5) { | |
1097 | g.attr_('pointClickCallback')(event, g.selPoints_[closestIdx]); | |
d58ae307 | 1098 | } |
6a1aa64f | 1099 | } |
ee672584 | 1100 | } |
e3489f4f | 1101 | |
ee672584 RK |
1102 | if (regionWidth >= 10 && context.dragDirection == Dygraph.HORIZONTAL) { |
1103 | g.doZoomX_(Math.min(context.dragStartX, context.dragEndX), | |
1104 | Math.max(context.dragStartX, context.dragEndX)); | |
1105 | } else if (regionHeight >= 10 && context.dragDirection == Dygraph.VERTICAL) { | |
1106 | g.doZoomY_(Math.min(context.dragStartY, context.dragEndY), | |
1107 | Math.max(context.dragStartY, context.dragEndY)); | |
1108 | } else { | |
1109 | g.canvas_.getContext("2d").clearRect(0, 0, | |
1110 | g.canvas_.width, | |
1111 | g.canvas_.height); | |
1112 | } | |
1113 | context.dragStartX = null; | |
1114 | context.dragStartY = null; | |
1115 | } | |
79b3ee42 | 1116 | |
0a52ab7a RK |
1117 | Dygraph.defaultInteractionModel = { |
1118 | // Track the beginning of drag events | |
4f0c5aa0 DV |
1119 | mousedown: function(event, g, context) { |
1120 | context.initializeMouseDown(event, g, context); | |
0a52ab7a | 1121 | |
4f0c5aa0 DV |
1122 | if (event.altKey || event.shiftKey) { |
1123 | Dygraph.startPan(event, g, context); | |
bce01b0f | 1124 | } else { |
4f0c5aa0 | 1125 | Dygraph.startZoom(event, g, context); |
bce01b0f | 1126 | } |
4f0c5aa0 | 1127 | }, |
6a1aa64f | 1128 | |
0a52ab7a | 1129 | // Draw zoom rectangles when the mouse is down and the user moves around |
4f0c5aa0 DV |
1130 | mousemove: function(event, g, context) { |
1131 | if (context.isZooming) { | |
1132 | Dygraph.moveZoom(event, g, context); | |
1133 | } else if (context.isPanning) { | |
1134 | Dygraph.movePan(event, g, context); | |
6a1aa64f | 1135 | } |
4f0c5aa0 | 1136 | }, |
bce01b0f | 1137 | |
4f0c5aa0 DV |
1138 | mouseup: function(event, g, context) { |
1139 | if (context.isZooming) { | |
1140 | Dygraph.endZoom(event, g, context); | |
1141 | } else if (context.isPanning) { | |
1142 | Dygraph.endPan(event, g, context); | |
bce01b0f | 1143 | } |
4f0c5aa0 | 1144 | }, |
6a1aa64f DV |
1145 | |
1146 | // Temporarily cancel the dragging event when the mouse leaves the graph | |
4f0c5aa0 DV |
1147 | mouseout: function(event, g, context) { |
1148 | if (context.isZooming) { | |
1149 | context.dragEndX = null; | |
1150 | context.dragEndY = null; | |
6a1aa64f | 1151 | } |
4f0c5aa0 | 1152 | }, |
6a1aa64f | 1153 | |
0a52ab7a | 1154 | // Disable zooming out if panning. |
4f0c5aa0 DV |
1155 | dblclick: function(event, g, context) { |
1156 | if (event.altKey || event.shiftKey) { | |
1157 | return; | |
0a52ab7a | 1158 | } |
4f0c5aa0 DV |
1159 | // TODO(konigsberg): replace g.doUnzoom()_ with something that is |
1160 | // friendlier to public use. | |
1161 | g.doUnzoom_(); | |
1162 | } | |
0a52ab7a | 1163 | }; |
1e1bf7df | 1164 | |
0a52ab7a | 1165 | Dygraph.DEFAULT_ATTRS.interactionModel = Dygraph.defaultInteractionModel; |
6a1aa64f | 1166 | |
ee672584 RK |
1167 | /** |
1168 | * Set up all the mouse handlers needed to capture dragging behavior for zoom | |
1169 | * events. | |
1170 | * @private | |
1171 | */ | |
1172 | Dygraph.prototype.createDragInterface_ = function() { | |
1173 | var context = { | |
1174 | // Tracks whether the mouse is down right now | |
4f0c5aa0 DV |
1175 | isZooming: false, |
1176 | isPanning: false, // is this drag part of a pan? | |
1177 | is2DPan: false, // if so, is that pan 1- or 2-dimensional? | |
1178 | dragStartX: null, | |
1179 | dragStartY: null, | |
1180 | dragEndX: null, | |
1181 | dragEndY: null, | |
1182 | dragDirection: null, | |
1183 | prevEndX: null, | |
1184 | prevEndY: null, | |
1185 | prevDragDirection: null, | |
ee672584 | 1186 | |
ec291cbe RK |
1187 | // The value on the left side of the graph when a pan operation starts. |
1188 | initialLeftmostDate: null, | |
1189 | ||
1190 | // The number of units each pixel spans. (This won't be valid for log | |
1191 | // scales) | |
1192 | xUnitsPerPixel: null, | |
ee672584 RK |
1193 | |
1194 | // TODO(danvk): update this comment | |
1195 | // The range in second/value units that the viewport encompasses during a | |
1196 | // panning operation. | |
4f0c5aa0 | 1197 | dateRange: null, |
ee672584 RK |
1198 | |
1199 | // Utility function to convert page-wide coordinates to canvas coords | |
4f0c5aa0 DV |
1200 | px: 0, |
1201 | py: 0, | |
ee672584 | 1202 | |
4f0c5aa0 | 1203 | initializeMouseDown: function(event, g, context) { |
885c13e4 | 1204 | // prevents mouse drags from selecting page text. |
ee672584 RK |
1205 | if (event.preventDefault) { |
1206 | event.preventDefault(); // Firefox, Chrome, etc. | |
6a1aa64f | 1207 | } else { |
ee672584 | 1208 | event.returnValue = false; // IE |
4f0c5aa0 | 1209 | event.cancelBubble = true; |
6a1aa64f DV |
1210 | } |
1211 | ||
ee672584 RK |
1212 | context.px = Dygraph.findPosX(g.canvas_); |
1213 | context.py = Dygraph.findPosY(g.canvas_); | |
1214 | context.dragStartX = g.dragGetX_(event, context); | |
1215 | context.dragStartY = g.dragGetY_(event, context); | |
6a1aa64f | 1216 | } |
ee672584 | 1217 | }; |
bce01b0f | 1218 | |
885c13e4 RK |
1219 | var interactionModel = this.attr_("interactionModel"); |
1220 | ||
2b188b3d RK |
1221 | // Self is the graph. |
1222 | var self = this; | |
1223 | ||
1224 | // Function that binds the graph and context to the handler. | |
1225 | var bindHandler = function(handler) { | |
ee672584 | 1226 | return function(event) { |
2b188b3d | 1227 | handler(event, self, context); |
ee672584 RK |
1228 | }; |
1229 | }; | |
1230 | ||
885c13e4 RK |
1231 | for (var eventName in interactionModel) { |
1232 | if (!interactionModel.hasOwnProperty(eventName)) continue; | |
ee672584 | 1233 | Dygraph.addEvent(this.mouseEventElement_, eventName, |
2b188b3d | 1234 | bindHandler(interactionModel[eventName])); |
ee672584 | 1235 | } |
6a1aa64f | 1236 | |
6a1aa64f DV |
1237 | // If the user releases the mouse button during a drag, but not over the |
1238 | // canvas, then it doesn't count as a zooming action. | |
76171648 | 1239 | Dygraph.addEvent(document, 'mouseup', function(event) { |
ee672584 RK |
1240 | if (context.isZooming || context.isPanning) { |
1241 | context.isZooming = false; | |
1242 | context.dragStartX = null; | |
1243 | context.dragStartY = null; | |
6a1aa64f | 1244 | } |
8b83c6cc | 1245 | |
ee672584 RK |
1246 | if (context.isPanning) { |
1247 | context.isPanning = false; | |
1248 | context.draggingDate = null; | |
1249 | context.dateRange = null; | |
d58ae307 | 1250 | for (var i = 0; i < self.axes_.length; i++) { |
d63e6799 DV |
1251 | delete self.axes_[i].draggingValue; |
1252 | delete self.axes_[i].dragValueRange; | |
d58ae307 | 1253 | } |
bce01b0f | 1254 | } |
6a1aa64f DV |
1255 | }); |
1256 | }; | |
1257 | ||
1258 | /** | |
1259 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
1260 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
1261 | * avoid extra redrawing, but it's tricky to avoid interactions with the status | |
1262 | * dots. | |
8b83c6cc | 1263 | * |
39b0e098 RK |
1264 | * @param {Number} direction the direction of the zoom rectangle. Acceptable |
1265 | * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL. | |
6a1aa64f DV |
1266 | * @param {Number} startX The X position where the drag started, in canvas |
1267 | * coordinates. | |
1268 | * @param {Number} endX The current X position of the drag, in canvas coords. | |
8b83c6cc RK |
1269 | * @param {Number} startY The Y position where the drag started, in canvas |
1270 | * coordinates. | |
1271 | * @param {Number} endY The current Y position of the drag, in canvas coords. | |
39b0e098 | 1272 | * @param {Number} prevDirection the value of direction on the previous call to |
8b83c6cc | 1273 | * this function. Used to avoid excess redrawing |
6a1aa64f DV |
1274 | * @param {Number} prevEndX The value of endX on the previous call to this |
1275 | * function. Used to avoid excess redrawing | |
8b83c6cc RK |
1276 | * @param {Number} prevEndY The value of endY on the previous call to this |
1277 | * function. Used to avoid excess redrawing | |
6a1aa64f DV |
1278 | * @private |
1279 | */ | |
8b83c6cc RK |
1280 | Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY, endY, |
1281 | prevDirection, prevEndX, prevEndY) { | |
6a1aa64f DV |
1282 | var ctx = this.canvas_.getContext("2d"); |
1283 | ||
1284 | // Clean up from the previous rect if necessary | |
39b0e098 | 1285 | if (prevDirection == Dygraph.HORIZONTAL) { |
6a1aa64f DV |
1286 | ctx.clearRect(Math.min(startX, prevEndX), 0, |
1287 | Math.abs(startX - prevEndX), this.height_); | |
39b0e098 | 1288 | } else if (prevDirection == Dygraph.VERTICAL){ |
8b83c6cc RK |
1289 | ctx.clearRect(0, Math.min(startY, prevEndY), |
1290 | this.width_, Math.abs(startY - prevEndY)); | |
6a1aa64f DV |
1291 | } |
1292 | ||
1293 | // Draw a light-grey rectangle to show the new viewing area | |
39b0e098 | 1294 | if (direction == Dygraph.HORIZONTAL) { |
8b83c6cc RK |
1295 | if (endX && startX) { |
1296 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
1297 | ctx.fillRect(Math.min(startX, endX), 0, | |
1298 | Math.abs(endX - startX), this.height_); | |
1299 | } | |
1300 | } | |
39b0e098 | 1301 | if (direction == Dygraph.VERTICAL) { |
8b83c6cc RK |
1302 | if (endY && startY) { |
1303 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
1304 | ctx.fillRect(0, Math.min(startY, endY), | |
1305 | this.width_, Math.abs(endY - startY)); | |
1306 | } | |
6a1aa64f DV |
1307 | } |
1308 | }; | |
1309 | ||
1310 | /** | |
8b83c6cc RK |
1311 | * Zoom to something containing [lowX, highX]. These are pixel coordinates in |
1312 | * the canvas. The exact zoom window may be slightly larger if there are no data | |
1313 | * points near lowX or highX. Don't confuse this function with doZoomXDates, | |
1314 | * which accepts dates that match the raw data. This function redraws the graph. | |
d58ae307 | 1315 | * |
6a1aa64f DV |
1316 | * @param {Number} lowX The leftmost pixel value that should be visible. |
1317 | * @param {Number} highX The rightmost pixel value that should be visible. | |
1318 | * @private | |
1319 | */ | |
8b83c6cc | 1320 | Dygraph.prototype.doZoomX_ = function(lowX, highX) { |
6a1aa64f | 1321 | // Find the earliest and latest dates contained in this canvasx range. |
8b83c6cc | 1322 | // Convert the call to date ranges of the raw data. |
ff022deb RK |
1323 | var minDate = this.toDataXCoord(lowX); |
1324 | var maxDate = this.toDataXCoord(highX); | |
8b83c6cc RK |
1325 | this.doZoomXDates_(minDate, maxDate); |
1326 | }; | |
6a1aa64f | 1327 | |
8b83c6cc RK |
1328 | /** |
1329 | * Zoom to something containing [minDate, maxDate] values. Don't confuse this | |
1330 | * method with doZoomX which accepts pixel coordinates. This function redraws | |
1331 | * the graph. | |
d58ae307 | 1332 | * |
8b83c6cc RK |
1333 | * @param {Number} minDate The minimum date that should be visible. |
1334 | * @param {Number} maxDate The maximum date that should be visible. | |
1335 | * @private | |
1336 | */ | |
1337 | Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) { | |
6a1aa64f | 1338 | this.dateWindow_ = [minDate, maxDate]; |
57baab03 | 1339 | this.zoomed_x_ = true; |
26ca7938 | 1340 | this.drawGraph_(); |
285a6bda | 1341 | if (this.attr_("zoomCallback")) { |
ac139d19 | 1342 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); |
8b83c6cc RK |
1343 | } |
1344 | }; | |
1345 | ||
1346 | /** | |
1347 | * Zoom to something containing [lowY, highY]. These are pixel coordinates in | |
d58ae307 DV |
1348 | * the canvas. This function redraws the graph. |
1349 | * | |
8b83c6cc RK |
1350 | * @param {Number} lowY The topmost pixel value that should be visible. |
1351 | * @param {Number} highY The lowest pixel value that should be visible. | |
1352 | * @private | |
1353 | */ | |
1354 | Dygraph.prototype.doZoomY_ = function(lowY, highY) { | |
d58ae307 DV |
1355 | // Find the highest and lowest values in pixel range for each axis. |
1356 | // Note that lowY (in pixels) corresponds to the max Value (in data coords). | |
1357 | // This is because pixels increase as you go down on the screen, whereas data | |
1358 | // coordinates increase as you go up the screen. | |
1359 | var valueRanges = []; | |
1360 | for (var i = 0; i < this.axes_.length; i++) { | |
ff022deb RK |
1361 | var hi = this.toDataYCoord(lowY, i); |
1362 | var low = this.toDataYCoord(highY, i); | |
1363 | this.axes_[i].valueWindow = [low, hi]; | |
1364 | valueRanges.push([low, hi]); | |
d58ae307 | 1365 | } |
8b83c6cc | 1366 | |
57baab03 | 1367 | this.zoomed_y_ = true; |
66c380c4 | 1368 | this.drawGraph_(); |
8b83c6cc | 1369 | if (this.attr_("zoomCallback")) { |
d58ae307 | 1370 | var xRange = this.xAxisRange(); |
45f2c689 | 1371 | var yRange = this.yAxisRange(); |
6589db1d | 1372 | this.attr_("zoomCallback")(xRange[0], xRange[1], this.yAxisRanges()); |
8b83c6cc RK |
1373 | } |
1374 | }; | |
1375 | ||
1376 | /** | |
1377 | * Reset the zoom to the original view coordinates. This is the same as | |
1378 | * double-clicking on the graph. | |
d58ae307 | 1379 | * |
8b83c6cc RK |
1380 | * @private |
1381 | */ | |
1382 | Dygraph.prototype.doUnzoom_ = function() { | |
d58ae307 | 1383 | var dirty = false; |
8b83c6cc | 1384 | if (this.dateWindow_ != null) { |
d58ae307 | 1385 | dirty = true; |
8b83c6cc RK |
1386 | this.dateWindow_ = null; |
1387 | } | |
d58ae307 DV |
1388 | |
1389 | for (var i = 0; i < this.axes_.length; i++) { | |
1390 | if (this.axes_[i].valueWindow != null) { | |
1391 | dirty = true; | |
1392 | delete this.axes_[i].valueWindow; | |
1393 | } | |
8b83c6cc RK |
1394 | } |
1395 | ||
1396 | if (dirty) { | |
437c0979 RK |
1397 | // Putting the drawing operation before the callback because it resets |
1398 | // yAxisRange. | |
57baab03 NN |
1399 | this.zoomed_x_ = false; |
1400 | this.zoomed_y_ = false; | |
66c380c4 | 1401 | this.drawGraph_(); |
8b83c6cc RK |
1402 | if (this.attr_("zoomCallback")) { |
1403 | var minDate = this.rawData_[0][0]; | |
1404 | var maxDate = this.rawData_[this.rawData_.length - 1][0]; | |
d58ae307 | 1405 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); |
8b83c6cc | 1406 | } |
67e650dc | 1407 | } |
6a1aa64f DV |
1408 | }; |
1409 | ||
1410 | /** | |
1411 | * When the mouse moves in the canvas, display information about a nearby data | |
1412 | * point and draw dots over those points in the data series. This function | |
1413 | * takes care of cleanup of previously-drawn dots. | |
1414 | * @param {Object} event The mousemove event from the browser. | |
1415 | * @private | |
1416 | */ | |
285a6bda | 1417 | Dygraph.prototype.mouseMove_ = function(event) { |
eb7bf005 | 1418 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_); |
6a1aa64f DV |
1419 | var points = this.layout_.points; |
1420 | ||
1421 | var lastx = -1; | |
1422 | var lasty = -1; | |
1423 | ||
1424 | // Loop through all the points and find the date nearest to our current | |
1425 | // location. | |
1426 | var minDist = 1e+100; | |
1427 | var idx = -1; | |
1428 | for (var i = 0; i < points.length; i++) { | |
8a7cc60e RK |
1429 | var point = points[i]; |
1430 | if (point == null) continue; | |
ee672584 | 1431 | var dist = Math.abs(point.canvasx - canvasx); |
f032c51d | 1432 | if (dist > minDist) continue; |
6a1aa64f DV |
1433 | minDist = dist; |
1434 | idx = i; | |
1435 | } | |
1436 | if (idx >= 0) lastx = points[idx].xval; | |
6a1aa64f DV |
1437 | |
1438 | // Extract the points we've selected | |
b258a3da | 1439 | this.selPoints_ = []; |
50360fd0 | 1440 | var l = points.length; |
416b05ad NK |
1441 | if (!this.attr_("stackedGraph")) { |
1442 | for (var i = 0; i < l; i++) { | |
1443 | if (points[i].xval == lastx) { | |
1444 | this.selPoints_.push(points[i]); | |
1445 | } | |
1446 | } | |
1447 | } else { | |
354e15ab DE |
1448 | // Need to 'unstack' points starting from the bottom |
1449 | var cumulative_sum = 0; | |
416b05ad NK |
1450 | for (var i = l - 1; i >= 0; i--) { |
1451 | if (points[i].xval == lastx) { | |
354e15ab | 1452 | var p = {}; // Clone the point since we modify it |
d4139cd8 NK |
1453 | for (var k in points[i]) { |
1454 | p[k] = points[i][k]; | |
50360fd0 NK |
1455 | } |
1456 | p.yval -= cumulative_sum; | |
1457 | cumulative_sum += p.yval; | |
d4139cd8 | 1458 | this.selPoints_.push(p); |
12e4c741 | 1459 | } |
6a1aa64f | 1460 | } |
354e15ab | 1461 | this.selPoints_.reverse(); |
6a1aa64f DV |
1462 | } |
1463 | ||
b258a3da | 1464 | if (this.attr_("highlightCallback")) { |
a4c6a67c | 1465 | var px = this.lastx_; |
dd082dda | 1466 | if (px !== null && lastx != px) { |
344ba8c0 | 1467 | // only fire if the selected point has changed. |
2ddb1197 | 1468 | this.attr_("highlightCallback")(event, lastx, this.selPoints_, this.idxToRow_(idx)); |
43af96e7 | 1469 | } |
12e4c741 | 1470 | } |
43af96e7 | 1471 | |
239c712d NAG |
1472 | // Save last x position for callbacks. |
1473 | this.lastx_ = lastx; | |
50360fd0 | 1474 | |
239c712d NAG |
1475 | this.updateSelection_(); |
1476 | }; | |
b258a3da | 1477 | |
239c712d | 1478 | /** |
1903f1e4 | 1479 | * Transforms layout_.points index into data row number. |
2ddb1197 | 1480 | * @param int layout_.points index |
1903f1e4 | 1481 | * @return int row number, or -1 if none could be found. |
2ddb1197 SC |
1482 | * @private |
1483 | */ | |
1484 | Dygraph.prototype.idxToRow_ = function(idx) { | |
1903f1e4 | 1485 | if (idx < 0) return -1; |
2ddb1197 | 1486 | |
1903f1e4 DV |
1487 | for (var i in this.layout_.datasets) { |
1488 | if (idx < this.layout_.datasets[i].length) { | |
1489 | return this.boundaryIds_[0][0]+idx; | |
1490 | } | |
1491 | idx -= this.layout_.datasets[i].length; | |
1492 | } | |
1493 | return -1; | |
1494 | }; | |
2ddb1197 SC |
1495 | |
1496 | /** | |
239c712d NAG |
1497 | * Draw dots over the selectied points in the data series. This function |
1498 | * takes care of cleanup of previously-drawn dots. | |
1499 | * @private | |
1500 | */ | |
1501 | Dygraph.prototype.updateSelection_ = function() { | |
6a1aa64f | 1502 | // Clear the previously drawn vertical, if there is one |
6a1aa64f DV |
1503 | var ctx = this.canvas_.getContext("2d"); |
1504 | if (this.previousVerticalX_ >= 0) { | |
46dde5f9 DV |
1505 | // Determine the maximum highlight circle size. |
1506 | var maxCircleSize = 0; | |
227b93cc DV |
1507 | var labels = this.attr_('labels'); |
1508 | for (var i = 1; i < labels.length; i++) { | |
1509 | var r = this.attr_('highlightCircleSize', labels[i]); | |
46dde5f9 DV |
1510 | if (r > maxCircleSize) maxCircleSize = r; |
1511 | } | |
6a1aa64f | 1512 | var px = this.previousVerticalX_; |
46dde5f9 DV |
1513 | ctx.clearRect(px - maxCircleSize - 1, 0, |
1514 | 2 * maxCircleSize + 2, this.height_); | |
6a1aa64f DV |
1515 | } |
1516 | ||
584ceeaa DV |
1517 | var isOK = function(x) { return x && !isNaN(x); }; |
1518 | ||
d160cc3b | 1519 | if (this.selPoints_.length > 0) { |
b258a3da | 1520 | var canvasx = this.selPoints_[0].canvasx; |
6a1aa64f DV |
1521 | |
1522 | // Set the status message to indicate the selected point(s) | |
239c712d | 1523 | var replace = this.attr_('xValueFormatter')(this.lastx_, this) + ":"; |
50360fd0 | 1524 | var fmtFunc = this.attr_('yValueFormatter'); |
6a1aa64f | 1525 | var clen = this.colors_.length; |
d160cc3b NK |
1526 | |
1527 | if (this.attr_('showLabelsOnHighlight')) { | |
1528 | // Set the status message to indicate the selected point(s) | |
d160cc3b | 1529 | for (var i = 0; i < this.selPoints_.length; i++) { |
129569a5 | 1530 | if (!this.attr_("labelsShowZeroValues") && this.selPoints_[i].yval == 0) continue; |
d160cc3b NK |
1531 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
1532 | if (this.attr_("labelsSeparateLines")) { | |
1533 | replace += "<br/>"; | |
1534 | } | |
1535 | var point = this.selPoints_[i]; | |
8fb6dc24 | 1536 | var c = new RGBColor(this.plotter_.colors[point.name]); |
029da4b6 | 1537 | var yval = fmtFunc(point.yval); |
d160cc3b NK |
1538 | replace += " <b><font color='" + c.toHex() + "'>" |
1539 | + point.name + "</font></b>:" | |
1540 | + yval; | |
6a1aa64f | 1541 | } |
50360fd0 | 1542 | |
d160cc3b | 1543 | this.attr_("labelsDiv").innerHTML = replace; |
6a1aa64f | 1544 | } |
6a1aa64f | 1545 | |
6a1aa64f | 1546 | // Draw colored circles over the center of each selected point |
43af96e7 | 1547 | ctx.save(); |
b258a3da | 1548 | for (var i = 0; i < this.selPoints_.length; i++) { |
f032c51d | 1549 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
227b93cc DV |
1550 | var circleSize = |
1551 | this.attr_('highlightCircleSize', this.selPoints_[i].name); | |
6a1aa64f | 1552 | ctx.beginPath(); |
563c70ca | 1553 | ctx.fillStyle = this.plotter_.colors[this.selPoints_[i].name]; |
f032c51d | 1554 | ctx.arc(canvasx, this.selPoints_[i].canvasy, circleSize, |
7bf6a9fe | 1555 | 0, 2 * Math.PI, false); |
6a1aa64f DV |
1556 | ctx.fill(); |
1557 | } | |
1558 | ctx.restore(); | |
1559 | ||
1560 | this.previousVerticalX_ = canvasx; | |
1561 | } | |
1562 | }; | |
1563 | ||
1564 | /** | |
239c712d NAG |
1565 | * Set manually set selected dots, and display information about them |
1566 | * @param int row number that should by highlighted | |
1567 | * false value clears the selection | |
1568 | * @public | |
1569 | */ | |
1570 | Dygraph.prototype.setSelection = function(row) { | |
1571 | // Extract the points we've selected | |
1572 | this.selPoints_ = []; | |
1573 | var pos = 0; | |
50360fd0 | 1574 | |
239c712d | 1575 | if (row !== false) { |
16269f6e NAG |
1576 | row = row-this.boundaryIds_[0][0]; |
1577 | } | |
50360fd0 | 1578 | |
16269f6e | 1579 | if (row !== false && row >= 0) { |
239c712d | 1580 | for (var i in this.layout_.datasets) { |
16269f6e | 1581 | if (row < this.layout_.datasets[i].length) { |
38f33a44 | 1582 | var point = this.layout_.points[pos+row]; |
1583 | ||
1584 | if (this.attr_("stackedGraph")) { | |
8c03ba63 | 1585 | point = this.layout_.unstackPointAtIndex(pos+row); |
38f33a44 | 1586 | } |
1587 | ||
1588 | this.selPoints_.push(point); | |
16269f6e | 1589 | } |
239c712d NAG |
1590 | pos += this.layout_.datasets[i].length; |
1591 | } | |
16269f6e | 1592 | } |
50360fd0 | 1593 | |
16269f6e | 1594 | if (this.selPoints_.length) { |
239c712d NAG |
1595 | this.lastx_ = this.selPoints_[0].xval; |
1596 | this.updateSelection_(); | |
1597 | } else { | |
1598 | this.lastx_ = -1; | |
1599 | this.clearSelection(); | |
1600 | } | |
1601 | ||
1602 | }; | |
1603 | ||
1604 | /** | |
6a1aa64f DV |
1605 | * The mouse has left the canvas. Clear out whatever artifacts remain |
1606 | * @param {Object} event the mouseout event from the browser. | |
1607 | * @private | |
1608 | */ | |
285a6bda | 1609 | Dygraph.prototype.mouseOut_ = function(event) { |
a4c6a67c AV |
1610 | if (this.attr_("unhighlightCallback")) { |
1611 | this.attr_("unhighlightCallback")(event); | |
1612 | } | |
1613 | ||
43af96e7 | 1614 | if (this.attr_("hideOverlayOnMouseOut")) { |
239c712d | 1615 | this.clearSelection(); |
43af96e7 | 1616 | } |
6a1aa64f DV |
1617 | }; |
1618 | ||
239c712d NAG |
1619 | /** |
1620 | * Remove all selection from the canvas | |
1621 | * @public | |
1622 | */ | |
1623 | Dygraph.prototype.clearSelection = function() { | |
1624 | // Get rid of the overlay data | |
1625 | var ctx = this.canvas_.getContext("2d"); | |
1626 | ctx.clearRect(0, 0, this.width_, this.height_); | |
1627 | this.attr_("labelsDiv").innerHTML = ""; | |
1628 | this.selPoints_ = []; | |
1629 | this.lastx_ = -1; | |
1630 | } | |
1631 | ||
103b7292 NAG |
1632 | /** |
1633 | * Returns the number of the currently selected row | |
1634 | * @return int row number, of -1 if nothing is selected | |
1635 | * @public | |
1636 | */ | |
1637 | Dygraph.prototype.getSelection = function() { | |
1638 | if (!this.selPoints_ || this.selPoints_.length < 1) { | |
1639 | return -1; | |
1640 | } | |
50360fd0 | 1641 | |
103b7292 NAG |
1642 | for (var row=0; row<this.layout_.points.length; row++ ) { |
1643 | if (this.layout_.points[row].x == this.selPoints_[0].x) { | |
16269f6e | 1644 | return row + this.boundaryIds_[0][0]; |
103b7292 NAG |
1645 | } |
1646 | } | |
1647 | return -1; | |
1648 | } | |
1649 | ||
285a6bda | 1650 | Dygraph.zeropad = function(x) { |
32988383 DV |
1651 | if (x < 10) return "0" + x; else return "" + x; |
1652 | } | |
1653 | ||
6a1aa64f | 1654 | /** |
6b8e33dd DV |
1655 | * Return a string version of the hours, minutes and seconds portion of a date. |
1656 | * @param {Number} date The JavaScript date (ms since epoch) | |
1657 | * @return {String} A time of the form "HH:MM:SS" | |
1658 | * @private | |
1659 | */ | |
bf640e56 | 1660 | Dygraph.hmsString_ = function(date) { |
285a6bda | 1661 | var zeropad = Dygraph.zeropad; |
6b8e33dd DV |
1662 | var d = new Date(date); |
1663 | if (d.getSeconds()) { | |
1664 | return zeropad(d.getHours()) + ":" + | |
1665 | zeropad(d.getMinutes()) + ":" + | |
1666 | zeropad(d.getSeconds()); | |
6b8e33dd | 1667 | } else { |
054531ca | 1668 | return zeropad(d.getHours()) + ":" + zeropad(d.getMinutes()); |
6b8e33dd DV |
1669 | } |
1670 | } | |
1671 | ||
1672 | /** | |
bf640e56 AV |
1673 | * Convert a JS date to a string appropriate to display on an axis that |
1674 | * is displaying values at the stated granularity. | |
1675 | * @param {Date} date The date to format | |
1676 | * @param {Number} granularity One of the Dygraph granularity constants | |
1677 | * @return {String} The formatted date | |
1678 | * @private | |
1679 | */ | |
1680 | Dygraph.dateAxisFormatter = function(date, granularity) { | |
5f70132f DV |
1681 | if (granularity >= Dygraph.DECADAL) { |
1682 | return date.strftime('%Y'); | |
1683 | } else if (granularity >= Dygraph.MONTHLY) { | |
bf640e56 AV |
1684 | return date.strftime('%b %y'); |
1685 | } else { | |
31eddad3 | 1686 | var frac = date.getHours() * 3600 + date.getMinutes() * 60 + date.getSeconds() + date.getMilliseconds(); |
bf640e56 AV |
1687 | if (frac == 0 || granularity >= Dygraph.DAILY) { |
1688 | return new Date(date.getTime() + 3600*1000).strftime('%d%b'); | |
1689 | } else { | |
1690 | return Dygraph.hmsString_(date.getTime()); | |
1691 | } | |
1692 | } | |
1693 | } | |
1694 | ||
1695 | /** | |
6a1aa64f DV |
1696 | * Convert a JS date (millis since epoch) to YYYY/MM/DD |
1697 | * @param {Number} date The JavaScript date (ms since epoch) | |
1698 | * @return {String} A date of the form "YYYY/MM/DD" | |
1699 | * @private | |
1700 | */ | |
285a6bda DV |
1701 | Dygraph.dateString_ = function(date, self) { |
1702 | var zeropad = Dygraph.zeropad; | |
6a1aa64f DV |
1703 | var d = new Date(date); |
1704 | ||
1705 | // Get the year: | |
1706 | var year = "" + d.getFullYear(); | |
1707 | // Get a 0 padded month string | |
6b8e33dd | 1708 | var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh |
6a1aa64f | 1709 | // Get a 0 padded day string |
6b8e33dd | 1710 | var day = zeropad(d.getDate()); |
6a1aa64f | 1711 | |
6b8e33dd DV |
1712 | var ret = ""; |
1713 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); | |
bf640e56 | 1714 | if (frac) ret = " " + Dygraph.hmsString_(date); |
6b8e33dd DV |
1715 | |
1716 | return year + "/" + month + "/" + day + ret; | |
6a1aa64f DV |
1717 | }; |
1718 | ||
1719 | /** | |
1720 | * Round a number to the specified number of digits past the decimal point. | |
1721 | * @param {Number} num The number to round | |
1722 | * @param {Number} places The number of decimals to which to round | |
1723 | * @return {Number} The rounded number | |
1724 | * @private | |
1725 | */ | |
029da4b6 | 1726 | Dygraph.round_ = function(num, places) { |
6a1aa64f DV |
1727 | var shift = Math.pow(10, places); |
1728 | return Math.round(num * shift)/shift; | |
1729 | }; | |
1730 | ||
1731 | /** | |
1732 | * Fires when there's data available to be graphed. | |
1733 | * @param {String} data Raw CSV data to be plotted | |
1734 | * @private | |
1735 | */ | |
285a6bda | 1736 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f | 1737 | this.rawData_ = this.parseCSV_(data); |
26ca7938 | 1738 | this.predraw_(); |
6a1aa64f DV |
1739 | }; |
1740 | ||
285a6bda | 1741 | Dygraph.prototype.months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", |
8846615a | 1742 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]; |
285a6bda | 1743 | Dygraph.prototype.quarters = ["Jan", "Apr", "Jul", "Oct"]; |
6a1aa64f DV |
1744 | |
1745 | /** | |
1746 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
1747 | * @private | |
1748 | */ | |
285a6bda | 1749 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f DV |
1750 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
1751 | var startDate, endDate; | |
1752 | if (this.dateWindow_) { | |
1753 | startDate = this.dateWindow_[0]; | |
1754 | endDate = this.dateWindow_[1]; | |
1755 | } else { | |
1756 | startDate = this.rawData_[0][0]; | |
1757 | endDate = this.rawData_[this.rawData_.length - 1][0]; | |
1758 | } | |
1759 | ||
285a6bda | 1760 | var xTicks = this.attr_('xTicker')(startDate, endDate, this); |
6a1aa64f | 1761 | this.layout_.updateOptions({xTicks: xTicks}); |
32988383 DV |
1762 | }; |
1763 | ||
1764 | // Time granularity enumeration | |
285a6bda | 1765 | Dygraph.SECONDLY = 0; |
20a41c17 DV |
1766 | Dygraph.TWO_SECONDLY = 1; |
1767 | Dygraph.FIVE_SECONDLY = 2; | |
1768 | Dygraph.TEN_SECONDLY = 3; | |
1769 | Dygraph.THIRTY_SECONDLY = 4; | |
1770 | Dygraph.MINUTELY = 5; | |
1771 | Dygraph.TWO_MINUTELY = 6; | |
1772 | Dygraph.FIVE_MINUTELY = 7; | |
1773 | Dygraph.TEN_MINUTELY = 8; | |
1774 | Dygraph.THIRTY_MINUTELY = 9; | |
1775 | Dygraph.HOURLY = 10; | |
1776 | Dygraph.TWO_HOURLY = 11; | |
1777 | Dygraph.SIX_HOURLY = 12; | |
1778 | Dygraph.DAILY = 13; | |
1779 | Dygraph.WEEKLY = 14; | |
1780 | Dygraph.MONTHLY = 15; | |
1781 | Dygraph.QUARTERLY = 16; | |
1782 | Dygraph.BIANNUAL = 17; | |
1783 | Dygraph.ANNUAL = 18; | |
1784 | Dygraph.DECADAL = 19; | |
3db4c464 | 1785 | Dygraph.CENTENNIAL = 20; |
5f70132f | 1786 | Dygraph.NUM_GRANULARITIES = 21; |
285a6bda DV |
1787 | |
1788 | Dygraph.SHORT_SPACINGS = []; | |
1789 | Dygraph.SHORT_SPACINGS[Dygraph.SECONDLY] = 1000 * 1; | |
20a41c17 DV |
1790 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_SECONDLY] = 1000 * 2; |
1791 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_SECONDLY] = 1000 * 5; | |
285a6bda DV |
1792 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_SECONDLY] = 1000 * 10; |
1793 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_SECONDLY] = 1000 * 30; | |
1794 | Dygraph.SHORT_SPACINGS[Dygraph.MINUTELY] = 1000 * 60; | |
20a41c17 DV |
1795 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_MINUTELY] = 1000 * 60 * 2; |
1796 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_MINUTELY] = 1000 * 60 * 5; | |
285a6bda DV |
1797 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_MINUTELY] = 1000 * 60 * 10; |
1798 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_MINUTELY] = 1000 * 60 * 30; | |
1799 | Dygraph.SHORT_SPACINGS[Dygraph.HOURLY] = 1000 * 3600; | |
20a41c17 | 1800 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_HOURLY] = 1000 * 3600 * 2; |
805d5519 | 1801 | Dygraph.SHORT_SPACINGS[Dygraph.SIX_HOURLY] = 1000 * 3600 * 6; |
285a6bda DV |
1802 | Dygraph.SHORT_SPACINGS[Dygraph.DAILY] = 1000 * 86400; |
1803 | Dygraph.SHORT_SPACINGS[Dygraph.WEEKLY] = 1000 * 604800; | |
32988383 DV |
1804 | |
1805 | // NumXTicks() | |
1806 | // | |
1807 | // If we used this time granularity, how many ticks would there be? | |
1808 | // This is only an approximation, but it's generally good enough. | |
1809 | // | |
285a6bda DV |
1810 | Dygraph.prototype.NumXTicks = function(start_time, end_time, granularity) { |
1811 | if (granularity < Dygraph.MONTHLY) { | |
32988383 | 1812 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1813 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
32988383 DV |
1814 | return Math.floor(0.5 + 1.0 * (end_time - start_time) / spacing); |
1815 | } else { | |
1816 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1817 | var num_months = 12; | |
285a6bda DV |
1818 | if (granularity == Dygraph.QUARTERLY) num_months = 3; |
1819 | if (granularity == Dygraph.BIANNUAL) num_months = 2; | |
1820 | if (granularity == Dygraph.ANNUAL) num_months = 1; | |
1821 | if (granularity == Dygraph.DECADAL) { num_months = 1; year_mod = 10; } | |
3db4c464 | 1822 | if (granularity == Dygraph.CENTENNIAL) { num_months = 1; year_mod = 100; } |
32988383 DV |
1823 | |
1824 | var msInYear = 365.2524 * 24 * 3600 * 1000; | |
1825 | var num_years = 1.0 * (end_time - start_time) / msInYear; | |
1826 | return Math.floor(0.5 + 1.0 * num_years * num_months / year_mod); | |
1827 | } | |
1828 | }; | |
1829 | ||
1830 | // GetXAxis() | |
1831 | // | |
1832 | // Construct an x-axis of nicely-formatted times on meaningful boundaries | |
1833 | // (e.g. 'Jan 09' rather than 'Jan 22, 2009'). | |
1834 | // | |
1835 | // Returns an array containing {v: millis, label: label} dictionaries. | |
1836 | // | |
285a6bda | 1837 | Dygraph.prototype.GetXAxis = function(start_time, end_time, granularity) { |
bf640e56 | 1838 | var formatter = this.attr_("xAxisLabelFormatter"); |
32988383 | 1839 | var ticks = []; |
285a6bda | 1840 | if (granularity < Dygraph.MONTHLY) { |
32988383 | 1841 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1842 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
3d29302c | 1843 | var format = '%d%b'; // e.g. "1Jan" |
076c9622 DV |
1844 | |
1845 | // Find a time less than start_time which occurs on a "nice" time boundary | |
1846 | // for this granularity. | |
1847 | var g = spacing / 1000; | |
076c9622 DV |
1848 | var d = new Date(start_time); |
1849 | if (g <= 60) { // seconds | |
1850 | var x = d.getSeconds(); d.setSeconds(x - x % g); | |
1851 | } else { | |
1852 | d.setSeconds(0); | |
1853 | g /= 60; | |
1854 | if (g <= 60) { // minutes | |
1855 | var x = d.getMinutes(); d.setMinutes(x - x % g); | |
1856 | } else { | |
1857 | d.setMinutes(0); | |
1858 | g /= 60; | |
1859 | ||
1860 | if (g <= 24) { // days | |
1861 | var x = d.getHours(); d.setHours(x - x % g); | |
1862 | } else { | |
1863 | d.setHours(0); | |
1864 | g /= 24; | |
1865 | ||
1866 | if (g == 7) { // one week | |
20a41c17 | 1867 | d.setDate(d.getDate() - d.getDay()); |
076c9622 DV |
1868 | } |
1869 | } | |
1870 | } | |
328bb812 | 1871 | } |
076c9622 DV |
1872 | start_time = d.getTime(); |
1873 | ||
32988383 | 1874 | for (var t = start_time; t <= end_time; t += spacing) { |
bf640e56 | 1875 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1876 | } |
1877 | } else { | |
1878 | // Display a tick mark on the first of a set of months of each year. | |
1879 | // Years get a tick mark iff y % year_mod == 0. This is useful for | |
1880 | // displaying a tick mark once every 10 years, say, on long time scales. | |
1881 | var months; | |
1882 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1883 | ||
285a6bda | 1884 | if (granularity == Dygraph.MONTHLY) { |
32988383 | 1885 | months = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ]; |
285a6bda | 1886 | } else if (granularity == Dygraph.QUARTERLY) { |
32988383 | 1887 | months = [ 0, 3, 6, 9 ]; |
285a6bda | 1888 | } else if (granularity == Dygraph.BIANNUAL) { |
32988383 | 1889 | months = [ 0, 6 ]; |
285a6bda | 1890 | } else if (granularity == Dygraph.ANNUAL) { |
32988383 | 1891 | months = [ 0 ]; |
285a6bda | 1892 | } else if (granularity == Dygraph.DECADAL) { |
32988383 DV |
1893 | months = [ 0 ]; |
1894 | year_mod = 10; | |
3db4c464 | 1895 | } else if (granularity == Dygraph.CENTENNIAL) { |
5f70132f DV |
1896 | months = [ 0 ]; |
1897 | year_mod = 100; | |
1898 | } else { | |
1899 | this.warn("Span of dates is too long"); | |
32988383 DV |
1900 | } |
1901 | ||
1902 | var start_year = new Date(start_time).getFullYear(); | |
1903 | var end_year = new Date(end_time).getFullYear(); | |
285a6bda | 1904 | var zeropad = Dygraph.zeropad; |
32988383 DV |
1905 | for (var i = start_year; i <= end_year; i++) { |
1906 | if (i % year_mod != 0) continue; | |
1907 | for (var j = 0; j < months.length; j++) { | |
1908 | var date_str = i + "/" + zeropad(1 + months[j]) + "/01"; | |
1909 | var t = Date.parse(date_str); | |
1910 | if (t < start_time || t > end_time) continue; | |
bf640e56 | 1911 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1912 | } |
1913 | } | |
1914 | } | |
1915 | ||
1916 | return ticks; | |
1917 | }; | |
1918 | ||
6a1aa64f DV |
1919 | |
1920 | /** | |
1921 | * Add ticks to the x-axis based on a date range. | |
1922 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1923 | * @param {Number} endDate End of the date window (millis since epoch) | |
1924 | * @return {Array.<Object>} Array of {label, value} tuples. | |
1925 | * @public | |
1926 | */ | |
285a6bda | 1927 | Dygraph.dateTicker = function(startDate, endDate, self) { |
32988383 | 1928 | var chosen = -1; |
285a6bda DV |
1929 | for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) { |
1930 | var num_ticks = self.NumXTicks(startDate, endDate, i); | |
1931 | if (self.width_ / num_ticks >= self.attr_('pixelsPerXLabel')) { | |
32988383 DV |
1932 | chosen = i; |
1933 | break; | |
2769de62 | 1934 | } |
6a1aa64f DV |
1935 | } |
1936 | ||
32988383 | 1937 | if (chosen >= 0) { |
285a6bda | 1938 | return self.GetXAxis(startDate, endDate, chosen); |
6a1aa64f | 1939 | } else { |
32988383 | 1940 | // TODO(danvk): signal error. |
6a1aa64f | 1941 | } |
6a1aa64f DV |
1942 | }; |
1943 | ||
c1bc242a DV |
1944 | // This is a list of human-friendly values at which to show tick marks on a log |
1945 | // scale. It is k * 10^n, where k=1..9 and n=-39..+39, so: | |
1946 | // ..., 1, 2, 3, 4, 5, ..., 9, 10, 20, 30, ..., 90, 100, 200, 300, ... | |
5db0e241 | 1947 | // NOTE: this assumes that Dygraph.LOG_SCALE = 10. |
0cfa06d1 | 1948 | Dygraph.PREFERRED_LOG_TICK_VALUES = function() { |
6821efbe RK |
1949 | var vals = []; |
1950 | for (var power = -39; power <= 39; power++) { | |
1951 | var range = Math.pow(10, power); | |
4b467120 RK |
1952 | for (var mult = 1; mult <= 9; mult++) { |
1953 | var val = range * mult; | |
6821efbe RK |
1954 | vals.push(val); |
1955 | } | |
1956 | } | |
1957 | return vals; | |
1958 | }(); | |
1959 | ||
0cfa06d1 RK |
1960 | // val is the value to search for |
1961 | // arry is the value over which to search | |
1962 | // if abs > 0, find the lowest entry greater than val | |
1963 | // if abs < 0, find the highest entry less than val | |
1964 | // if abs == 0, find the entry that equals val. | |
1965 | // Currently does not work when val is outside the range of arry's values. | |
1966 | Dygraph.binarySearch = function(val, arry, abs, low, high) { | |
1967 | if (low == null || high == null) { | |
1968 | low = 0; | |
1969 | high = arry.length - 1; | |
1970 | } | |
1971 | if (low > high) { | |
1972 | return -1; | |
1973 | } | |
1974 | if (abs == null) { | |
1975 | abs = 0; | |
1976 | } | |
1977 | var validIndex = function(idx) { | |
1978 | return idx >= 0 && idx < arry.length; | |
1979 | } | |
1980 | var mid = parseInt((low + high) / 2); | |
1981 | var element = arry[mid]; | |
1982 | if (element == val) { | |
1983 | return mid; | |
1984 | } | |
1985 | if (element > val) { | |
1986 | if (abs > 0) { | |
1987 | // Accept if element > val, but also if prior element < val. | |
1988 | var idx = mid - 1; | |
1989 | if (validIndex(idx) && arry[idx] < val) { | |
1990 | return mid; | |
1991 | } | |
1992 | } | |
c1bc242a | 1993 | return Dygraph.binarySearch(val, arry, abs, low, mid - 1); |
0cfa06d1 RK |
1994 | } |
1995 | if (element < val) { | |
1996 | if (abs < 0) { | |
1997 | // Accept if element < val, but also if prior element > val. | |
1998 | var idx = mid + 1; | |
1999 | if (validIndex(idx) && arry[idx] > val) { | |
2000 | return mid; | |
2001 | } | |
2002 | } | |
2003 | return Dygraph.binarySearch(val, arry, abs, mid + 1, high); | |
2004 | } | |
60a19014 | 2005 | }; |
0cfa06d1 | 2006 | |
6a1aa64f DV |
2007 | /** |
2008 | * Add ticks when the x axis has numbers on it (instead of dates) | |
ff022deb RK |
2009 | * TODO(konigsberg): Update comment. |
2010 | * | |
7d0e7a0d RK |
2011 | * @param {Number} minV minimum value |
2012 | * @param {Number} maxV maximum value | |
84fc6aa7 | 2013 | * @param self |
f30cf740 | 2014 | * @param {function} attribute accessor function. |
6a1aa64f DV |
2015 | * @return {Array.<Object>} Array of {label, value} tuples. |
2016 | * @public | |
2017 | */ | |
0d64e596 | 2018 | Dygraph.numericTicks = function(minV, maxV, self, axis_props, vals) { |
70c80071 DV |
2019 | var attr = function(k) { |
2020 | if (axis_props && axis_props.hasOwnProperty(k)) return axis_props[k]; | |
2021 | return self.attr_(k); | |
2022 | }; | |
f09fc545 | 2023 | |
0d64e596 DV |
2024 | var ticks = []; |
2025 | if (vals) { | |
2026 | for (var i = 0; i < vals.length; i++) { | |
2027 | ticks.push({v: vals[i]}); | |
2028 | } | |
f09e46d4 | 2029 | } else { |
7d0e7a0d | 2030 | if (axis_props && attr("logscale")) { |
ff022deb | 2031 | var pixelsPerTick = attr('pixelsPerYLabel'); |
7d0e7a0d | 2032 | // NOTE(konigsberg): Dan, should self.height_ be self.plotter_.area.h? |
ff022deb | 2033 | var nTicks = Math.floor(self.height_ / pixelsPerTick); |
0cfa06d1 RK |
2034 | var minIdx = Dygraph.binarySearch(minV, Dygraph.PREFERRED_LOG_TICK_VALUES, 1); |
2035 | var maxIdx = Dygraph.binarySearch(maxV, Dygraph.PREFERRED_LOG_TICK_VALUES, -1); | |
2036 | if (minIdx == -1) { | |
6821efbe RK |
2037 | minIdx = 0; |
2038 | } | |
0cfa06d1 RK |
2039 | if (maxIdx == -1) { |
2040 | maxIdx = Dygraph.PREFERRED_LOG_TICK_VALUES.length - 1; | |
6821efbe | 2041 | } |
0cfa06d1 RK |
2042 | // Count the number of tick values would appear, if we can get at least |
2043 | // nTicks / 4 accept them. | |
00aa7f61 | 2044 | var lastDisplayed = null; |
0cfa06d1 | 2045 | if (maxIdx - minIdx >= nTicks / 4) { |
00aa7f61 | 2046 | var axisId = axis_props.yAxisId; |
0cfa06d1 RK |
2047 | for (var idx = maxIdx; idx >= minIdx; idx--) { |
2048 | var tickValue = Dygraph.PREFERRED_LOG_TICK_VALUES[idx]; | |
00aa7f61 RK |
2049 | var domCoord = axis_props.g.toDomYCoord(tickValue, axisId); |
2050 | var tick = { v: tickValue }; | |
2051 | if (lastDisplayed == null) { | |
2052 | lastDisplayed = { | |
2053 | tickValue : tickValue, | |
2054 | domCoord : domCoord | |
2055 | }; | |
2056 | } else { | |
2057 | if (domCoord - lastDisplayed.domCoord >= pixelsPerTick) { | |
2058 | lastDisplayed = { | |
2059 | tickValue : tickValue, | |
2060 | domCoord : domCoord | |
2061 | }; | |
2062 | } else { | |
c1bc242a | 2063 | tick.label = ""; |
00aa7f61 RK |
2064 | } |
2065 | } | |
2066 | ticks.push(tick); | |
6821efbe | 2067 | } |
0cfa06d1 RK |
2068 | // Since we went in backwards order. |
2069 | ticks.reverse(); | |
6821efbe | 2070 | } |
f09e46d4 | 2071 | } |
c1bc242a | 2072 | |
6821efbe RK |
2073 | // ticks.length won't be 0 if the log scale function finds values to insert. |
2074 | if (ticks.length == 0) { | |
ff022deb RK |
2075 | // Basic idea: |
2076 | // Try labels every 1, 2, 5, 10, 20, 50, 100, etc. | |
2077 | // Calculate the resulting tick spacing (i.e. this.height_ / nTicks). | |
2078 | // The first spacing greater than pixelsPerYLabel is what we use. | |
2079 | // TODO(danvk): version that works on a log scale. | |
0d64e596 | 2080 | if (attr("labelsKMG2")) { |
ff022deb | 2081 | var mults = [1, 2, 4, 8]; |
0d64e596 | 2082 | } else { |
ff022deb | 2083 | var mults = [1, 2, 5]; |
0d64e596 | 2084 | } |
ff022deb RK |
2085 | var scale, low_val, high_val, nTicks; |
2086 | // TODO(danvk): make it possible to set this for x- and y-axes independently. | |
2087 | var pixelsPerTick = attr('pixelsPerYLabel'); | |
2088 | for (var i = -10; i < 50; i++) { | |
2089 | if (attr("labelsKMG2")) { | |
2090 | var base_scale = Math.pow(16, i); | |
2091 | } else { | |
2092 | var base_scale = Math.pow(10, i); | |
2093 | } | |
2094 | for (var j = 0; j < mults.length; j++) { | |
2095 | scale = base_scale * mults[j]; | |
2096 | low_val = Math.floor(minV / scale) * scale; | |
2097 | high_val = Math.ceil(maxV / scale) * scale; | |
2098 | nTicks = Math.abs(high_val - low_val) / scale; | |
2099 | var spacing = self.height_ / nTicks; | |
2100 | // wish I could break out of both loops at once... | |
2101 | if (spacing > pixelsPerTick) break; | |
2102 | } | |
0d64e596 DV |
2103 | if (spacing > pixelsPerTick) break; |
2104 | } | |
0d64e596 | 2105 | |
ff022deb RK |
2106 | // Construct the set of ticks. |
2107 | // Allow reverse y-axis if it's explicitly requested. | |
2108 | if (low_val > high_val) scale *= -1; | |
2109 | for (var i = 0; i < nTicks; i++) { | |
2110 | var tickV = low_val + i * scale; | |
2111 | ticks.push( {v: tickV} ); | |
2112 | } | |
0d64e596 | 2113 | } |
6a1aa64f DV |
2114 | } |
2115 | ||
0d64e596 | 2116 | // Add formatted labels to the ticks. |
ed11be50 DV |
2117 | var k; |
2118 | var k_labels = []; | |
f09fc545 | 2119 | if (attr("labelsKMB")) { |
ed11be50 DV |
2120 | k = 1000; |
2121 | k_labels = [ "K", "M", "B", "T" ]; | |
2122 | } | |
f09fc545 | 2123 | if (attr("labelsKMG2")) { |
ed11be50 DV |
2124 | if (k) self.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); |
2125 | k = 1024; | |
2126 | k_labels = [ "k", "M", "G", "T" ]; | |
2127 | } | |
c94eee24 | 2128 | var formatter = attr('yAxisLabelFormatter') ? attr('yAxisLabelFormatter') : attr('yValueFormatter'); |
ed11be50 | 2129 | |
0cfa06d1 | 2130 | // Add labels to the ticks. |
0d64e596 | 2131 | for (var i = 0; i < ticks.length; i++) { |
0cfa06d1 RK |
2132 | if (ticks[i].label == null) { |
2133 | var tickV = ticks[i].v; | |
2134 | var absTickV = Math.abs(tickV); | |
2135 | var label; | |
2136 | if (formatter != undefined) { | |
2137 | label = formatter(tickV); | |
2138 | } else { | |
2139 | label = Dygraph.round_(tickV, 2); | |
2140 | } | |
2141 | if (k_labels.length) { | |
2142 | // Round up to an appropriate unit. | |
2143 | var n = k*k*k*k; | |
2144 | for (var j = 3; j >= 0; j--, n /= k) { | |
2145 | if (absTickV >= n) { | |
2146 | label = Dygraph.round_(tickV / n, 1) + k_labels[j]; | |
2147 | break; | |
2148 | } | |
ed11be50 | 2149 | } |
afefbcdb | 2150 | } |
0cfa06d1 | 2151 | ticks[i].label = label; |
6a1aa64f | 2152 | } |
6a1aa64f DV |
2153 | } |
2154 | return ticks; | |
2155 | }; | |
2156 | ||
5011e7a1 DV |
2157 | // Computes the range of the data series (including confidence intervals). |
2158 | // series is either [ [x1, y1], [x2, y2], ... ] or | |
2159 | // [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... | |
2160 | // Returns [low, high] | |
2161 | Dygraph.prototype.extremeValues_ = function(series) { | |
2162 | var minY = null, maxY = null; | |
2163 | ||
9922b78b | 2164 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
5011e7a1 DV |
2165 | if (bars) { |
2166 | // With custom bars, maxY is the max of the high values. | |
2167 | for (var j = 0; j < series.length; j++) { | |
2168 | var y = series[j][1][0]; | |
2169 | if (!y) continue; | |
2170 | var low = y - series[j][1][1]; | |
2171 | var high = y + series[j][1][2]; | |
2172 | if (low > y) low = y; // this can happen with custom bars, | |
2173 | if (high < y) high = y; // e.g. in tests/custom-bars.html | |
2174 | if (maxY == null || high > maxY) { | |
2175 | maxY = high; | |
2176 | } | |
2177 | if (minY == null || low < minY) { | |
2178 | minY = low; | |
2179 | } | |
2180 | } | |
2181 | } else { | |
2182 | for (var j = 0; j < series.length; j++) { | |
2183 | var y = series[j][1]; | |
d12999d3 | 2184 | if (y === null || isNaN(y)) continue; |
5011e7a1 DV |
2185 | if (maxY == null || y > maxY) { |
2186 | maxY = y; | |
2187 | } | |
2188 | if (minY == null || y < minY) { | |
2189 | minY = y; | |
2190 | } | |
2191 | } | |
2192 | } | |
2193 | ||
2194 | return [minY, maxY]; | |
2195 | }; | |
2196 | ||
6a1aa64f | 2197 | /** |
26ca7938 DV |
2198 | * This function is called once when the chart's data is changed or the options |
2199 | * dictionary is updated. It is _not_ called when the user pans or zooms. The | |
2200 | * idea is that values derived from the chart's data can be computed here, | |
2201 | * rather than every time the chart is drawn. This includes things like the | |
2202 | * number of axes, rolling averages, etc. | |
2203 | */ | |
2204 | Dygraph.prototype.predraw_ = function() { | |
2205 | // TODO(danvk): move more computations out of drawGraph_ and into here. | |
2206 | this.computeYAxes_(); | |
2207 | ||
2208 | // Create a new plotter. | |
70c80071 | 2209 | if (this.plotter_) this.plotter_.clear(); |
26ca7938 DV |
2210 | this.plotter_ = new DygraphCanvasRenderer(this, |
2211 | this.hidden_, this.layout_, | |
2212 | this.renderOptions_); | |
2213 | ||
0abfbd7e DV |
2214 | // The roller sits in the bottom left corner of the chart. We don't know where |
2215 | // this will be until the options are available, so it's positioned here. | |
8c69de65 | 2216 | this.createRollInterface_(); |
26ca7938 | 2217 | |
0abfbd7e DV |
2218 | // Same thing applies for the labelsDiv. It's right edge should be flush with |
2219 | // the right edge of the charting area (which may not be the same as the right | |
2220 | // edge of the div, if we have two y-axes. | |
2221 | this.positionLabelsDiv_(); | |
2222 | ||
26ca7938 DV |
2223 | // If the data or options have changed, then we'd better redraw. |
2224 | this.drawGraph_(); | |
2225 | }; | |
2226 | ||
2227 | /** | |
2228 | * Update the graph with new data. This method is called when the viewing area | |
2229 | * has changed. If the underlying data or options have changed, predraw_ will | |
2230 | * be called before drawGraph_ is called. | |
6a1aa64f DV |
2231 | * @private |
2232 | */ | |
26ca7938 DV |
2233 | Dygraph.prototype.drawGraph_ = function() { |
2234 | var data = this.rawData_; | |
2235 | ||
fe0b7c03 DV |
2236 | // This is used to set the second parameter to drawCallback, below. |
2237 | var is_initial_draw = this.is_initial_draw_; | |
2238 | this.is_initial_draw_ = false; | |
2239 | ||
3bd9c228 | 2240 | var minY = null, maxY = null; |
6a1aa64f | 2241 | this.layout_.removeAllDatasets(); |
285a6bda | 2242 | this.setColors_(); |
9317362d | 2243 | this.attrs_['pointSize'] = 0.5 * this.attr_('highlightCircleSize'); |
285a6bda | 2244 | |
354e15ab DE |
2245 | // Loop over the fields (series). Go from the last to the first, |
2246 | // because if they're stacked that's how we accumulate the values. | |
43af96e7 | 2247 | |
354e15ab DE |
2248 | var cumulative_y = []; // For stacked series. |
2249 | var datasets = []; | |
2250 | ||
f09fc545 DV |
2251 | var extremes = {}; // series name -> [low, high] |
2252 | ||
354e15ab DE |
2253 | // Loop over all fields and create datasets |
2254 | for (var i = data[0].length - 1; i >= 1; i--) { | |
1cf11047 DV |
2255 | if (!this.visibility()[i - 1]) continue; |
2256 | ||
f09fc545 | 2257 | var seriesName = this.attr_("labels")[i]; |
450fe64b | 2258 | var connectSeparatedPoints = this.attr_('connectSeparatedPoints', i); |
6e6a2b0a | 2259 | var logScale = this.attr_('logscale', i); |
450fe64b | 2260 | |
6a1aa64f DV |
2261 | var series = []; |
2262 | for (var j = 0; j < data.length; j++) { | |
6e6a2b0a RK |
2263 | var date = data[j][0]; |
2264 | var point = data[j][i]; | |
2265 | if (logScale) { | |
2266 | // On the log scale, points less than zero do not exist. | |
2267 | // This will create a gap in the chart. Note that this ignores | |
2268 | // connectSeparatedPoints. | |
74dfe455 | 2269 | if (point <= 0) { |
6e6a2b0a RK |
2270 | point = null; |
2271 | } | |
2272 | series.push([date, point]); | |
2273 | } else { | |
2274 | if (point != null || !connectSeparatedPoints) { | |
2275 | series.push([date, point]); | |
2276 | } | |
f032c51d | 2277 | } |
6a1aa64f | 2278 | } |
2f5e7e1a DV |
2279 | |
2280 | // TODO(danvk): move this into predraw_. It's insane to do it here. | |
6a1aa64f DV |
2281 | series = this.rollingAverage(series, this.rollPeriod_); |
2282 | ||
2283 | // Prune down to the desired range, if necessary (for zooming) | |
1a26f3fb DV |
2284 | // Because there can be lines going to points outside of the visible area, |
2285 | // we actually prune to visible points, plus one on either side. | |
9922b78b | 2286 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
6a1aa64f DV |
2287 | if (this.dateWindow_) { |
2288 | var low = this.dateWindow_[0]; | |
2289 | var high= this.dateWindow_[1]; | |
2290 | var pruned = []; | |
1a26f3fb DV |
2291 | // TODO(danvk): do binary search instead of linear search. |
2292 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. | |
2293 | var firstIdx = null, lastIdx = null; | |
6a1aa64f | 2294 | for (var k = 0; k < series.length; k++) { |
1a26f3fb DV |
2295 | if (series[k][0] >= low && firstIdx === null) { |
2296 | firstIdx = k; | |
2297 | } | |
2298 | if (series[k][0] <= high) { | |
2299 | lastIdx = k; | |
6a1aa64f DV |
2300 | } |
2301 | } | |
1a26f3fb DV |
2302 | if (firstIdx === null) firstIdx = 0; |
2303 | if (firstIdx > 0) firstIdx--; | |
2304 | if (lastIdx === null) lastIdx = series.length - 1; | |
2305 | if (lastIdx < series.length - 1) lastIdx++; | |
16269f6e | 2306 | this.boundaryIds_[i-1] = [firstIdx, lastIdx]; |
1a26f3fb DV |
2307 | for (var k = firstIdx; k <= lastIdx; k++) { |
2308 | pruned.push(series[k]); | |
6a1aa64f DV |
2309 | } |
2310 | series = pruned; | |
16269f6e NAG |
2311 | } else { |
2312 | this.boundaryIds_[i-1] = [0, series.length-1]; | |
6a1aa64f DV |
2313 | } |
2314 | ||
f09fc545 | 2315 | var seriesExtremes = this.extremeValues_(series); |
5011e7a1 | 2316 | |
6a1aa64f | 2317 | if (bars) { |
354e15ab DE |
2318 | for (var j=0; j<series.length; j++) { |
2319 | val = [series[j][0], series[j][1][0], series[j][1][1], series[j][1][2]]; | |
2320 | series[j] = val; | |
2321 | } | |
43af96e7 | 2322 | } else if (this.attr_("stackedGraph")) { |
43af96e7 NK |
2323 | var l = series.length; |
2324 | var actual_y; | |
2325 | for (var j = 0; j < l; j++) { | |
354e15ab DE |
2326 | // If one data set has a NaN, let all subsequent stacked |
2327 | // sets inherit the NaN -- only start at 0 for the first set. | |
2328 | var x = series[j][0]; | |
41b0f691 | 2329 | if (cumulative_y[x] === undefined) { |
354e15ab | 2330 | cumulative_y[x] = 0; |
41b0f691 | 2331 | } |
43af96e7 NK |
2332 | |
2333 | actual_y = series[j][1]; | |
354e15ab | 2334 | cumulative_y[x] += actual_y; |
43af96e7 | 2335 | |
354e15ab | 2336 | series[j] = [x, cumulative_y[x]] |
43af96e7 | 2337 | |
41b0f691 DV |
2338 | if (cumulative_y[x] > seriesExtremes[1]) { |
2339 | seriesExtremes[1] = cumulative_y[x]; | |
2340 | } | |
2341 | if (cumulative_y[x] < seriesExtremes[0]) { | |
2342 | seriesExtremes[0] = cumulative_y[x]; | |
2343 | } | |
43af96e7 | 2344 | } |
6a1aa64f | 2345 | } |
41b0f691 | 2346 | extremes[seriesName] = seriesExtremes; |
354e15ab DE |
2347 | |
2348 | datasets[i] = series; | |
6a1aa64f DV |
2349 | } |
2350 | ||
354e15ab | 2351 | for (var i = 1; i < datasets.length; i++) { |
4523c1f6 | 2352 | if (!this.visibility()[i - 1]) continue; |
354e15ab | 2353 | this.layout_.addDataset(this.attr_("labels")[i], datasets[i]); |
43af96e7 NK |
2354 | } |
2355 | ||
81856f70 NN |
2356 | if (datasets.length > 0) { |
2357 | // TODO(danvk): this method doesn't need to return anything. | |
2358 | var out = this.computeYAxisRanges_(extremes); | |
2359 | var axes = out[0]; | |
2360 | var seriesToAxisMap = out[1]; | |
2361 | this.layout_.updateOptions( { yAxes: axes, | |
2362 | seriesToAxisMap: seriesToAxisMap | |
2363 | } ); | |
2364 | } | |
6a1aa64f DV |
2365 | this.addXTicks_(); |
2366 | ||
81856f70 NN |
2367 | // Save the X axis zoomed status as the updateOptions call will tend to set it errorneously |
2368 | var tmp_zoomed_x = this.zoomed_x_; | |
6a1aa64f | 2369 | // Tell PlotKit to use this new data and render itself |
d033ae1c | 2370 | this.layout_.updateOptions({dateWindow: this.dateWindow_}); |
81856f70 | 2371 | this.zoomed_x_ = tmp_zoomed_x; |
6a1aa64f DV |
2372 | this.layout_.evaluateWithError(); |
2373 | this.plotter_.clear(); | |
2374 | this.plotter_.render(); | |
f6401bf6 | 2375 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
2f5e7e1a | 2376 | this.canvas_.height); |
599fb4ad DV |
2377 | |
2378 | if (this.attr_("drawCallback") !== null) { | |
fe0b7c03 | 2379 | this.attr_("drawCallback")(this, is_initial_draw); |
599fb4ad | 2380 | } |
6a1aa64f DV |
2381 | }; |
2382 | ||
2383 | /** | |
26ca7938 DV |
2384 | * Determine properties of the y-axes which are independent of the data |
2385 | * currently being displayed. This includes things like the number of axes and | |
2386 | * the style of the axes. It does not include the range of each axis and its | |
2387 | * tick marks. | |
2388 | * This fills in this.axes_ and this.seriesToAxisMap_. | |
2389 | * axes_ = [ { options } ] | |
2390 | * seriesToAxisMap_ = { seriesName: 0, seriesName2: 1, ... } | |
2391 | * indices are into the axes_ array. | |
f09fc545 | 2392 | */ |
26ca7938 | 2393 | Dygraph.prototype.computeYAxes_ = function() { |
81856f70 | 2394 | var valueWindows; |
45f2c689 NN |
2395 | if (this.axes_ != undefined) { |
2396 | // Preserve valueWindow settings. | |
81856f70 | 2397 | valueWindows = []; |
45f2c689 | 2398 | for (var index = 0; index < this.axes_.length; index++) { |
81856f70 | 2399 | valueWindows.push(this.axes_[index].valueWindow); |
45f2c689 NN |
2400 | } |
2401 | } | |
2402 | ||
00aa7f61 | 2403 | this.axes_ = [{ yAxisId : 0, g : this }]; // always have at least one y-axis. |
26ca7938 DV |
2404 | this.seriesToAxisMap_ = {}; |
2405 | ||
2406 | // Get a list of series names. | |
2407 | var labels = this.attr_("labels"); | |
1c77a3a1 | 2408 | var series = {}; |
26ca7938 | 2409 | for (var i = 1; i < labels.length; i++) series[labels[i]] = (i - 1); |
f09fc545 DV |
2410 | |
2411 | // all options which could be applied per-axis: | |
2412 | var axisOptions = [ | |
2413 | 'includeZero', | |
2414 | 'valueRange', | |
2415 | 'labelsKMB', | |
2416 | 'labelsKMG2', | |
2417 | 'pixelsPerYLabel', | |
2418 | 'yAxisLabelWidth', | |
2419 | 'axisLabelFontSize', | |
7d0e7a0d RK |
2420 | 'axisTickSize', |
2421 | 'logscale' | |
f09fc545 DV |
2422 | ]; |
2423 | ||
2424 | // Copy global axis options over to the first axis. | |
2425 | for (var i = 0; i < axisOptions.length; i++) { | |
2426 | var k = axisOptions[i]; | |
2427 | var v = this.attr_(k); | |
26ca7938 | 2428 | if (v) this.axes_[0][k] = v; |
f09fc545 DV |
2429 | } |
2430 | ||
2431 | // Go through once and add all the axes. | |
26ca7938 DV |
2432 | for (var seriesName in series) { |
2433 | if (!series.hasOwnProperty(seriesName)) continue; | |
f09fc545 DV |
2434 | var axis = this.attr_("axis", seriesName); |
2435 | if (axis == null) { | |
26ca7938 | 2436 | this.seriesToAxisMap_[seriesName] = 0; |
f09fc545 DV |
2437 | continue; |
2438 | } | |
2439 | if (typeof(axis) == 'object') { | |
2440 | // Add a new axis, making a copy of its per-axis options. | |
2441 | var opts = {}; | |
26ca7938 | 2442 | Dygraph.update(opts, this.axes_[0]); |
f09fc545 | 2443 | Dygraph.update(opts, { valueRange: null }); // shouldn't inherit this. |
ab51ff66 RK |
2444 | var yAxisId = this.axes_.length; |
2445 | opts.yAxisId = yAxisId; | |
00aa7f61 | 2446 | opts.g = this; |
f09fc545 | 2447 | Dygraph.update(opts, axis); |
26ca7938 | 2448 | this.axes_.push(opts); |
ab51ff66 | 2449 | this.seriesToAxisMap_[seriesName] = yAxisId; |
f09fc545 DV |
2450 | } |
2451 | } | |
2452 | ||
2453 | // Go through one more time and assign series to an axis defined by another | |
2454 | // series, e.g. { 'Y1: { axis: {} }, 'Y2': { axis: 'Y1' } } | |
26ca7938 DV |
2455 | for (var seriesName in series) { |
2456 | if (!series.hasOwnProperty(seriesName)) continue; | |
f09fc545 DV |
2457 | var axis = this.attr_("axis", seriesName); |
2458 | if (typeof(axis) == 'string') { | |
26ca7938 | 2459 | if (!this.seriesToAxisMap_.hasOwnProperty(axis)) { |
f09fc545 DV |
2460 | this.error("Series " + seriesName + " wants to share a y-axis with " + |
2461 | "series " + axis + ", which does not define its own axis."); | |
2462 | return null; | |
2463 | } | |
26ca7938 DV |
2464 | var idx = this.seriesToAxisMap_[axis]; |
2465 | this.seriesToAxisMap_[seriesName] = idx; | |
f09fc545 DV |
2466 | } |
2467 | } | |
1c77a3a1 DV |
2468 | |
2469 | // Now we remove series from seriesToAxisMap_ which are not visible. We do | |
2470 | // this last so that hiding the first series doesn't destroy the axis | |
2471 | // properties of the primary axis. | |
2472 | var seriesToAxisFiltered = {}; | |
2473 | var vis = this.visibility(); | |
2474 | for (var i = 1; i < labels.length; i++) { | |
2475 | var s = labels[i]; | |
2476 | if (vis[i - 1]) seriesToAxisFiltered[s] = this.seriesToAxisMap_[s]; | |
2477 | } | |
2478 | this.seriesToAxisMap_ = seriesToAxisFiltered; | |
45f2c689 | 2479 | |
81856f70 | 2480 | if (valueWindows != undefined) { |
45f2c689 | 2481 | // Restore valueWindow settings. |
81856f70 NN |
2482 | for (var index = 0; index < valueWindows.length; index++) { |
2483 | this.axes_[index].valueWindow = valueWindows[index]; | |
45f2c689 NN |
2484 | } |
2485 | } | |
26ca7938 DV |
2486 | }; |
2487 | ||
2488 | /** | |
2489 | * Returns the number of y-axes on the chart. | |
2490 | * @return {Number} the number of axes. | |
2491 | */ | |
2492 | Dygraph.prototype.numAxes = function() { | |
2493 | var last_axis = 0; | |
2494 | for (var series in this.seriesToAxisMap_) { | |
2495 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; | |
2496 | var idx = this.seriesToAxisMap_[series]; | |
2497 | if (idx > last_axis) last_axis = idx; | |
2498 | } | |
2499 | return 1 + last_axis; | |
2500 | }; | |
2501 | ||
2502 | /** | |
2503 | * Determine the value range and tick marks for each axis. | |
2504 | * @param {Object} extremes A mapping from seriesName -> [low, high] | |
2505 | * This fills in the valueRange and ticks fields in each entry of this.axes_. | |
2506 | */ | |
2507 | Dygraph.prototype.computeYAxisRanges_ = function(extremes) { | |
2508 | // Build a map from axis number -> [list of series names] | |
2509 | var seriesForAxis = []; | |
2510 | for (var series in this.seriesToAxisMap_) { | |
2511 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; | |
2512 | var idx = this.seriesToAxisMap_[series]; | |
2513 | while (seriesForAxis.length <= idx) seriesForAxis.push([]); | |
2514 | seriesForAxis[idx].push(series); | |
2515 | } | |
f09fc545 DV |
2516 | |
2517 | // Compute extreme values, a span and tick marks for each axis. | |
26ca7938 DV |
2518 | for (var i = 0; i < this.axes_.length; i++) { |
2519 | var axis = this.axes_[i]; | |
d58ae307 DV |
2520 | if (axis.valueWindow) { |
2521 | // This is only set if the user has zoomed on the y-axis. It is never set | |
2522 | // by a user. It takes precedence over axis.valueRange because, if you set | |
2523 | // valueRange, you'd still expect to be able to pan. | |
2524 | axis.computedValueRange = [axis.valueWindow[0], axis.valueWindow[1]]; | |
2525 | } else if (axis.valueRange) { | |
2526 | // This is a user-set value range for this axis. | |
26ca7938 DV |
2527 | axis.computedValueRange = [axis.valueRange[0], axis.valueRange[1]]; |
2528 | } else { | |
1c77a3a1 | 2529 | // Calculate the extremes of extremes. |
f09fc545 DV |
2530 | var series = seriesForAxis[i]; |
2531 | var minY = Infinity; // extremes[series[0]][0]; | |
2532 | var maxY = -Infinity; // extremes[series[0]][1]; | |
2533 | for (var j = 0; j < series.length; j++) { | |
2534 | minY = Math.min(extremes[series[j]][0], minY); | |
e3b6727e | 2535 | maxY = Math.max(extremes[series[j]][1], maxY); |
f09fc545 DV |
2536 | } |
2537 | if (axis.includeZero && minY > 0) minY = 0; | |
2538 | ||
2539 | // Add some padding and round up to an integer to be human-friendly. | |
2540 | var span = maxY - minY; | |
2541 | // special case: if we have no sense of scale, use +/-10% of the sole value. | |
2542 | if (span == 0) { span = maxY; } | |
f09fc545 | 2543 | |
ff022deb RK |
2544 | var maxAxisY; |
2545 | var minAxisY; | |
7d0e7a0d | 2546 | if (axis.logscale) { |
ff022deb RK |
2547 | var maxAxisY = maxY + 0.1 * span; |
2548 | var minAxisY = minY; | |
2549 | } else { | |
2550 | var maxAxisY = maxY + 0.1 * span; | |
2551 | var minAxisY = minY - 0.1 * span; | |
f09fc545 | 2552 | |
ff022deb RK |
2553 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. |
2554 | if (!this.attr_("avoidMinZero")) { | |
2555 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; | |
2556 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
2557 | } | |
f09fc545 | 2558 | |
ff022deb RK |
2559 | if (this.attr_("includeZero")) { |
2560 | if (maxY < 0) maxAxisY = 0; | |
2561 | if (minY > 0) minAxisY = 0; | |
2562 | } | |
f09fc545 DV |
2563 | } |
2564 | ||
26ca7938 | 2565 | axis.computedValueRange = [minAxisY, maxAxisY]; |
f09fc545 DV |
2566 | } |
2567 | ||
0d64e596 DV |
2568 | // Add ticks. By default, all axes inherit the tick positions of the |
2569 | // primary axis. However, if an axis is specifically marked as having | |
2570 | // independent ticks, then that is permissible as well. | |
2571 | if (i == 0 || axis.independentTicks) { | |
2572 | axis.ticks = | |
2573 | Dygraph.numericTicks(axis.computedValueRange[0], | |
2574 | axis.computedValueRange[1], | |
2575 | this, | |
2576 | axis); | |
2577 | } else { | |
2578 | var p_axis = this.axes_[0]; | |
2579 | var p_ticks = p_axis.ticks; | |
2580 | var p_scale = p_axis.computedValueRange[1] - p_axis.computedValueRange[0]; | |
2581 | var scale = axis.computedValueRange[1] - axis.computedValueRange[0]; | |
2582 | var tick_values = []; | |
2583 | for (var i = 0; i < p_ticks.length; i++) { | |
2584 | var y_frac = (p_ticks[i].v - p_axis.computedValueRange[0]) / p_scale; | |
2585 | var y_val = axis.computedValueRange[0] + y_frac * scale; | |
2586 | tick_values.push(y_val); | |
2587 | } | |
2588 | ||
2589 | axis.ticks = | |
2590 | Dygraph.numericTicks(axis.computedValueRange[0], | |
2591 | axis.computedValueRange[1], | |
2592 | this, axis, tick_values); | |
2593 | } | |
f09fc545 DV |
2594 | } |
2595 | ||
26ca7938 | 2596 | return [this.axes_, this.seriesToAxisMap_]; |
f09fc545 DV |
2597 | }; |
2598 | ||
2599 | /** | |
6a1aa64f DV |
2600 | * Calculates the rolling average of a data set. |
2601 | * If originalData is [label, val], rolls the average of those. | |
2602 | * If originalData is [label, [, it's interpreted as [value, stddev] | |
2603 | * and the roll is returned in the same form, with appropriately reduced | |
2604 | * stddev for each value. | |
2605 | * Note that this is where fractional input (i.e. '5/10') is converted into | |
2606 | * decimal values. | |
2607 | * @param {Array} originalData The data in the appropriate format (see above) | |
2608 | * @param {Number} rollPeriod The number of days over which to average the data | |
2609 | */ | |
285a6bda | 2610 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
6a1aa64f DV |
2611 | if (originalData.length < 2) |
2612 | return originalData; | |
2613 | var rollPeriod = Math.min(rollPeriod, originalData.length - 1); | |
2614 | var rollingData = []; | |
285a6bda | 2615 | var sigma = this.attr_("sigma"); |
6a1aa64f DV |
2616 | |
2617 | if (this.fractions_) { | |
2618 | var num = 0; | |
2619 | var den = 0; // numerator/denominator | |
2620 | var mult = 100.0; | |
2621 | for (var i = 0; i < originalData.length; i++) { | |
2622 | num += originalData[i][1][0]; | |
2623 | den += originalData[i][1][1]; | |
2624 | if (i - rollPeriod >= 0) { | |
2625 | num -= originalData[i - rollPeriod][1][0]; | |
2626 | den -= originalData[i - rollPeriod][1][1]; | |
2627 | } | |
2628 | ||
2629 | var date = originalData[i][0]; | |
2630 | var value = den ? num / den : 0.0; | |
285a6bda | 2631 | if (this.attr_("errorBars")) { |
6a1aa64f DV |
2632 | if (this.wilsonInterval_) { |
2633 | // For more details on this confidence interval, see: | |
2634 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval | |
2635 | if (den) { | |
2636 | var p = value < 0 ? 0 : value, n = den; | |
2637 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); | |
2638 | var denom = 1 + sigma * sigma / den; | |
2639 | var low = (p + sigma * sigma / (2 * den) - pm) / denom; | |
2640 | var high = (p + sigma * sigma / (2 * den) + pm) / denom; | |
2641 | rollingData[i] = [date, | |
2642 | [p * mult, (p - low) * mult, (high - p) * mult]]; | |
2643 | } else { | |
2644 | rollingData[i] = [date, [0, 0, 0]]; | |
2645 | } | |
2646 | } else { | |
2647 | var stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; | |
2648 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; | |
2649 | } | |
2650 | } else { | |
2651 | rollingData[i] = [date, mult * value]; | |
2652 | } | |
2653 | } | |
9922b78b | 2654 | } else if (this.attr_("customBars")) { |
f6885d6a DV |
2655 | var low = 0; |
2656 | var mid = 0; | |
2657 | var high = 0; | |
2658 | var count = 0; | |
6a1aa64f DV |
2659 | for (var i = 0; i < originalData.length; i++) { |
2660 | var data = originalData[i][1]; | |
2661 | var y = data[1]; | |
2662 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; | |
f6885d6a | 2663 | |
8b91c51f | 2664 | if (y != null && !isNaN(y)) { |
49a7d0d5 DV |
2665 | low += data[0]; |
2666 | mid += y; | |
2667 | high += data[2]; | |
2668 | count += 1; | |
2669 | } | |
f6885d6a DV |
2670 | if (i - rollPeriod >= 0) { |
2671 | var prev = originalData[i - rollPeriod]; | |
8b91c51f | 2672 | if (prev[1][1] != null && !isNaN(prev[1][1])) { |
49a7d0d5 DV |
2673 | low -= prev[1][0]; |
2674 | mid -= prev[1][1]; | |
2675 | high -= prev[1][2]; | |
2676 | count -= 1; | |
2677 | } | |
f6885d6a DV |
2678 | } |
2679 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, | |
2680 | 1.0 * (mid - low) / count, | |
2681 | 1.0 * (high - mid) / count ]]; | |
2769de62 | 2682 | } |
6a1aa64f DV |
2683 | } else { |
2684 | // Calculate the rolling average for the first rollPeriod - 1 points where | |
2685 | // there is not enough data to roll over the full number of days | |
2686 | var num_init_points = Math.min(rollPeriod - 1, originalData.length - 2); | |
285a6bda | 2687 | if (!this.attr_("errorBars")){ |
5011e7a1 DV |
2688 | if (rollPeriod == 1) { |
2689 | return originalData; | |
2690 | } | |
2691 | ||
2847c1cf | 2692 | for (var i = 0; i < originalData.length; i++) { |
6a1aa64f | 2693 | var sum = 0; |
5011e7a1 | 2694 | var num_ok = 0; |
2847c1cf DV |
2695 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
2696 | var y = originalData[j][1]; | |
8b91c51f | 2697 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 2698 | num_ok++; |
2847c1cf | 2699 | sum += originalData[j][1]; |
6a1aa64f | 2700 | } |
5011e7a1 | 2701 | if (num_ok) { |
2847c1cf | 2702 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
5011e7a1 | 2703 | } else { |
2847c1cf | 2704 | rollingData[i] = [originalData[i][0], null]; |
5011e7a1 | 2705 | } |
6a1aa64f | 2706 | } |
2847c1cf DV |
2707 | |
2708 | } else { | |
2709 | for (var i = 0; i < originalData.length; i++) { | |
6a1aa64f DV |
2710 | var sum = 0; |
2711 | var variance = 0; | |
5011e7a1 | 2712 | var num_ok = 0; |
2847c1cf | 2713 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
5011e7a1 | 2714 | var y = originalData[j][1][0]; |
8b91c51f | 2715 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 2716 | num_ok++; |
6a1aa64f DV |
2717 | sum += originalData[j][1][0]; |
2718 | variance += Math.pow(originalData[j][1][1], 2); | |
2719 | } | |
5011e7a1 DV |
2720 | if (num_ok) { |
2721 | var stddev = Math.sqrt(variance) / num_ok; | |
2722 | rollingData[i] = [originalData[i][0], | |
2723 | [sum / num_ok, sigma * stddev, sigma * stddev]]; | |
2724 | } else { | |
2725 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
2726 | } | |
6a1aa64f DV |
2727 | } |
2728 | } | |
2729 | } | |
2730 | ||
2731 | return rollingData; | |
2732 | }; | |
2733 | ||
2734 | /** | |
2735 | * Parses a date, returning the number of milliseconds since epoch. This can be | |
285a6bda DV |
2736 | * passed in as an xValueParser in the Dygraph constructor. |
2737 | * TODO(danvk): enumerate formats that this understands. | |
6a1aa64f DV |
2738 | * @param {String} A date in YYYYMMDD format. |
2739 | * @return {Number} Milliseconds since epoch. | |
2740 | * @public | |
2741 | */ | |
285a6bda | 2742 | Dygraph.dateParser = function(dateStr, self) { |
6a1aa64f | 2743 | var dateStrSlashed; |
285a6bda | 2744 | var d; |
986a5026 | 2745 | if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12' |
6a1aa64f | 2746 | dateStrSlashed = dateStr.replace("-", "/", "g"); |
353a0294 DV |
2747 | while (dateStrSlashed.search("-") != -1) { |
2748 | dateStrSlashed = dateStrSlashed.replace("-", "/"); | |
2749 | } | |
285a6bda | 2750 | d = Date.parse(dateStrSlashed); |
2769de62 | 2751 | } else if (dateStr.length == 8) { // e.g. '20090712' |
285a6bda | 2752 | // TODO(danvk): remove support for this format. It's confusing. |
6a1aa64f DV |
2753 | dateStrSlashed = dateStr.substr(0,4) + "/" + dateStr.substr(4,2) |
2754 | + "/" + dateStr.substr(6,2); | |
285a6bda | 2755 | d = Date.parse(dateStrSlashed); |
2769de62 DV |
2756 | } else { |
2757 | // Any format that Date.parse will accept, e.g. "2009/07/12" or | |
2758 | // "2009/07/12 12:34:56" | |
285a6bda DV |
2759 | d = Date.parse(dateStr); |
2760 | } | |
2761 | ||
2762 | if (!d || isNaN(d)) { | |
2763 | self.error("Couldn't parse " + dateStr + " as a date"); | |
2764 | } | |
2765 | return d; | |
2766 | }; | |
2767 | ||
2768 | /** | |
2769 | * Detects the type of the str (date or numeric) and sets the various | |
2770 | * formatting attributes in this.attrs_ based on this type. | |
2771 | * @param {String} str An x value. | |
2772 | * @private | |
2773 | */ | |
2774 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
2775 | var isDate = false; | |
ea62df82 | 2776 | if (str.indexOf('-') > 0 || |
285a6bda DV |
2777 | str.indexOf('/') >= 0 || |
2778 | isNaN(parseFloat(str))) { | |
2779 | isDate = true; | |
2780 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
2781 | // TODO(danvk): remove support for this format. | |
2782 | isDate = true; | |
2783 | } | |
2784 | ||
2785 | if (isDate) { | |
2786 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
2787 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2788 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2789 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
2790 | } else { |
2791 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
2792 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
2793 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2794 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
6a1aa64f | 2795 | } |
6a1aa64f DV |
2796 | }; |
2797 | ||
2798 | /** | |
2799 | * Parses a string in a special csv format. We expect a csv file where each | |
2800 | * line is a date point, and the first field in each line is the date string. | |
2801 | * We also expect that all remaining fields represent series. | |
285a6bda | 2802 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f DV |
2803 | * date, series1, stddev1, series2, stddev2, ... |
2804 | * @param {Array.<Object>} data See above. | |
2805 | * @private | |
285a6bda DV |
2806 | * |
2807 | * @return Array.<Object> An array with one entry for each row. These entries | |
2808 | * are an array of cells in that row. The first entry is the parsed x-value for | |
2809 | * the row. The second, third, etc. are the y-values. These can take on one of | |
2810 | * three forms, depending on the CSV and constructor parameters: | |
2811 | * 1. numeric value | |
2812 | * 2. [ value, stddev ] | |
2813 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 2814 | */ |
285a6bda | 2815 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f DV |
2816 | var ret = []; |
2817 | var lines = data.split("\n"); | |
3d67f03b DV |
2818 | |
2819 | // Use the default delimiter or fall back to a tab if that makes sense. | |
2820 | var delim = this.attr_('delimiter'); | |
2821 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { | |
2822 | delim = '\t'; | |
2823 | } | |
2824 | ||
285a6bda | 2825 | var start = 0; |
6a1aa64f | 2826 | if (this.labelsFromCSV_) { |
285a6bda | 2827 | start = 1; |
3d67f03b | 2828 | this.attrs_.labels = lines[0].split(delim); |
6a1aa64f DV |
2829 | } |
2830 | ||
03b522a4 DV |
2831 | // Parse the x as a float or return null if it's not a number. |
2832 | var parseFloatOrNull = function(x) { | |
41333ec0 | 2833 | var val = parseFloat(x); |
1f7f664b DV |
2834 | // isFinite() returns false for NaN and +/-Infinity. |
2835 | return isFinite(val) ? val : null; | |
03b522a4 DV |
2836 | }; |
2837 | ||
285a6bda DV |
2838 | var xParser; |
2839 | var defaultParserSet = false; // attempt to auto-detect x value type | |
2840 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 2841 | var outOfOrder = false; |
6a1aa64f DV |
2842 | for (var i = start; i < lines.length; i++) { |
2843 | var line = lines[i]; | |
2844 | if (line.length == 0) continue; // skip blank lines | |
3d67f03b DV |
2845 | if (line[0] == '#') continue; // skip comment lines |
2846 | var inFields = line.split(delim); | |
285a6bda | 2847 | if (inFields.length < 2) continue; |
6a1aa64f DV |
2848 | |
2849 | var fields = []; | |
285a6bda DV |
2850 | if (!defaultParserSet) { |
2851 | this.detectTypeFromString_(inFields[0]); | |
2852 | xParser = this.attr_("xValueParser"); | |
2853 | defaultParserSet = true; | |
2854 | } | |
2855 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
2856 | |
2857 | // If fractions are expected, parse the numbers as "A/B" | |
2858 | if (this.fractions_) { | |
2859 | for (var j = 1; j < inFields.length; j++) { | |
2860 | // TODO(danvk): figure out an appropriate way to flag parse errors. | |
2861 | var vals = inFields[j].split("/"); | |
03b522a4 | 2862 | fields[j] = [parseFloatOrNull(vals[0]), parseFloatOrNull(vals[1])]; |
6a1aa64f | 2863 | } |
285a6bda | 2864 | } else if (this.attr_("errorBars")) { |
6a1aa64f DV |
2865 | // If there are error bars, values are (value, stddev) pairs |
2866 | for (var j = 1; j < inFields.length; j += 2) | |
03b522a4 DV |
2867 | fields[(j + 1) / 2] = [parseFloatOrNull(inFields[j]), |
2868 | parseFloatOrNull(inFields[j + 1])]; | |
9922b78b | 2869 | } else if (this.attr_("customBars")) { |
6a1aa64f DV |
2870 | // Bars are a low;center;high tuple |
2871 | for (var j = 1; j < inFields.length; j++) { | |
2872 | var vals = inFields[j].split(";"); | |
03b522a4 DV |
2873 | fields[j] = [ parseFloatOrNull(vals[0]), |
2874 | parseFloatOrNull(vals[1]), | |
2875 | parseFloatOrNull(vals[2]) ]; | |
6a1aa64f DV |
2876 | } |
2877 | } else { | |
2878 | // Values are just numbers | |
285a6bda | 2879 | for (var j = 1; j < inFields.length; j++) { |
03b522a4 | 2880 | fields[j] = parseFloatOrNull(inFields[j]); |
285a6bda | 2881 | } |
6a1aa64f | 2882 | } |
987840a2 DV |
2883 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
2884 | outOfOrder = true; | |
2885 | } | |
6a1aa64f | 2886 | ret.push(fields); |
285a6bda DV |
2887 | |
2888 | if (fields.length != expectedCols) { | |
2889 | this.error("Number of columns in line " + i + " (" + fields.length + | |
2890 | ") does not agree with number of labels (" + expectedCols + | |
2891 | ") " + line); | |
2892 | } | |
6a1aa64f | 2893 | } |
987840a2 DV |
2894 | |
2895 | if (outOfOrder) { | |
2896 | this.warn("CSV is out of order; order it correctly to speed loading."); | |
2897 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2898 | } | |
2899 | ||
6a1aa64f DV |
2900 | return ret; |
2901 | }; | |
2902 | ||
2903 | /** | |
285a6bda DV |
2904 | * The user has provided their data as a pre-packaged JS array. If the x values |
2905 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
2906 | * are dates, we need to convert them from Date objects to ms since epoch. | |
2907 | * @param {Array.<Object>} data | |
2908 | * @return {Array.<Object>} data with numeric x values. | |
2909 | */ | |
2910 | Dygraph.prototype.parseArray_ = function(data) { | |
2911 | // Peek at the first x value to see if it's numeric. | |
2912 | if (data.length == 0) { | |
2913 | this.error("Can't plot empty data set"); | |
2914 | return null; | |
2915 | } | |
2916 | if (data[0].length == 0) { | |
2917 | this.error("Data set cannot contain an empty row"); | |
2918 | return null; | |
2919 | } | |
2920 | ||
2921 | if (this.attr_("labels") == null) { | |
2922 | this.warn("Using default labels. Set labels explicitly via 'labels' " + | |
2923 | "in the options parameter"); | |
2924 | this.attrs_.labels = [ "X" ]; | |
2925 | for (var i = 1; i < data[0].length; i++) { | |
2926 | this.attrs_.labels.push("Y" + i); | |
2927 | } | |
2928 | } | |
2929 | ||
2dda3850 | 2930 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda DV |
2931 | // Some intelligent defaults for a date x-axis. |
2932 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
bf640e56 | 2933 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
2934 | this.attrs_.xTicker = Dygraph.dateTicker; |
2935 | ||
2936 | // Assume they're all dates. | |
e3ab7b40 | 2937 | var parsedData = Dygraph.clone(data); |
285a6bda DV |
2938 | for (var i = 0; i < data.length; i++) { |
2939 | if (parsedData[i].length == 0) { | |
a323ff4a | 2940 | this.error("Row " + (1 + i) + " of data is empty"); |
285a6bda DV |
2941 | return null; |
2942 | } | |
2943 | if (parsedData[i][0] == null | |
3a909ec5 DV |
2944 | || typeof(parsedData[i][0].getTime) != 'function' |
2945 | || isNaN(parsedData[i][0].getTime())) { | |
be96a1f5 | 2946 | this.error("x value in row " + (1 + i) + " is not a Date"); |
285a6bda DV |
2947 | return null; |
2948 | } | |
2949 | parsedData[i][0] = parsedData[i][0].getTime(); | |
2950 | } | |
2951 | return parsedData; | |
2952 | } else { | |
2953 | // Some intelligent defaults for a numeric x-axis. | |
2954 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
2955 | this.attrs_.xTicker = Dygraph.numericTicks; | |
2956 | return data; | |
2957 | } | |
2958 | }; | |
2959 | ||
2960 | /** | |
79420a1e DV |
2961 | * Parses a DataTable object from gviz. |
2962 | * The data is expected to have a first column that is either a date or a | |
2963 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
2964 | * between this.xValueParser_ and the type of the first column, it will be | |
a685723c | 2965 | * fixed. Fills out rawData_. |
79420a1e DV |
2966 | * @param {Array.<Object>} data See above. |
2967 | * @private | |
2968 | */ | |
285a6bda | 2969 | Dygraph.prototype.parseDataTable_ = function(data) { |
79420a1e DV |
2970 | var cols = data.getNumberOfColumns(); |
2971 | var rows = data.getNumberOfRows(); | |
2972 | ||
d955e223 | 2973 | var indepType = data.getColumnType(0); |
4440f6c8 | 2974 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda DV |
2975 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
2976 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2977 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2978 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
33127159 | 2979 | } else if (indepType == 'number') { |
285a6bda DV |
2980 | this.attrs_.xValueFormatter = function(x) { return x; }; |
2981 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
2982 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2983 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
285a6bda | 2984 | } else { |
987840a2 DV |
2985 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
2986 | "column 1 of DataTable input (Got '" + indepType + "')"); | |
79420a1e DV |
2987 | return null; |
2988 | } | |
2989 | ||
a685723c DV |
2990 | // Array of the column indices which contain data (and not annotations). |
2991 | var colIdx = []; | |
2992 | var annotationCols = {}; // data index -> [annotation cols] | |
2993 | var hasAnnotations = false; | |
2994 | for (var i = 1; i < cols; i++) { | |
2995 | var type = data.getColumnType(i); | |
2996 | if (type == 'number') { | |
2997 | colIdx.push(i); | |
2998 | } else if (type == 'string' && this.attr_('displayAnnotations')) { | |
2999 | // This is OK -- it's an annotation column. | |
3000 | var dataIdx = colIdx[colIdx.length - 1]; | |
3001 | if (!annotationCols.hasOwnProperty(dataIdx)) { | |
3002 | annotationCols[dataIdx] = [i]; | |
3003 | } else { | |
3004 | annotationCols[dataIdx].push(i); | |
3005 | } | |
3006 | hasAnnotations = true; | |
3007 | } else { | |
3008 | this.error("Only 'number' is supported as a dependent type with Gviz." + | |
3009 | " 'string' is only supported if displayAnnotations is true"); | |
3010 | } | |
3011 | } | |
3012 | ||
3013 | // Read column labels | |
3014 | // TODO(danvk): add support back for errorBars | |
3015 | var labels = [data.getColumnLabel(0)]; | |
3016 | for (var i = 0; i < colIdx.length; i++) { | |
3017 | labels.push(data.getColumnLabel(colIdx[i])); | |
f9348814 | 3018 | if (this.attr_("errorBars")) i += 1; |
a685723c DV |
3019 | } |
3020 | this.attrs_.labels = labels; | |
3021 | cols = labels.length; | |
3022 | ||
79420a1e | 3023 | var ret = []; |
987840a2 | 3024 | var outOfOrder = false; |
a685723c | 3025 | var annotations = []; |
79420a1e DV |
3026 | for (var i = 0; i < rows; i++) { |
3027 | var row = []; | |
debe4434 DV |
3028 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
3029 | data.getValue(i, 0) === null) { | |
129569a5 FD |
3030 | this.warn("Ignoring row " + i + |
3031 | " of DataTable because of undefined or null first column."); | |
debe4434 DV |
3032 | continue; |
3033 | } | |
3034 | ||
c21d2c2d | 3035 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
3036 | row.push(data.getValue(i, 0).getTime()); |
3037 | } else { | |
3038 | row.push(data.getValue(i, 0)); | |
3039 | } | |
3e3f84e4 | 3040 | if (!this.attr_("errorBars")) { |
a685723c DV |
3041 | for (var j = 0; j < colIdx.length; j++) { |
3042 | var col = colIdx[j]; | |
3043 | row.push(data.getValue(i, col)); | |
3044 | if (hasAnnotations && | |
3045 | annotationCols.hasOwnProperty(col) && | |
3046 | data.getValue(i, annotationCols[col][0]) != null) { | |
3047 | var ann = {}; | |
3048 | ann.series = data.getColumnLabel(col); | |
3049 | ann.xval = row[0]; | |
3050 | ann.shortText = String.fromCharCode(65 /* A */ + annotations.length) | |
3051 | ann.text = ''; | |
3052 | for (var k = 0; k < annotationCols[col].length; k++) { | |
3053 | if (k) ann.text += "\n"; | |
3054 | ann.text += data.getValue(i, annotationCols[col][k]); | |
3055 | } | |
3056 | annotations.push(ann); | |
3057 | } | |
3e3f84e4 DV |
3058 | } |
3059 | } else { | |
3060 | for (var j = 0; j < cols - 1; j++) { | |
3061 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); | |
3062 | } | |
79420a1e | 3063 | } |
987840a2 DV |
3064 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
3065 | outOfOrder = true; | |
3066 | } | |
1f7f664b DV |
3067 | |
3068 | // Strip out infinities, which give dygraphs problems later on. | |
3069 | for (var j = 0; j < row.length; j++) { | |
3070 | if (!isFinite(row[j])) row[j] = null; | |
3071 | } | |
243d96e8 | 3072 | ret.push(row); |
79420a1e | 3073 | } |
987840a2 DV |
3074 | |
3075 | if (outOfOrder) { | |
3076 | this.warn("DataTable is out of order; order it correctly to speed loading."); | |
3077 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
3078 | } | |
a685723c DV |
3079 | this.rawData_ = ret; |
3080 | ||
3081 | if (annotations.length > 0) { | |
3082 | this.setAnnotations(annotations, true); | |
3083 | } | |
79420a1e DV |
3084 | } |
3085 | ||
24e5350c | 3086 | // These functions are all based on MochiKit. |
fc80a396 DV |
3087 | Dygraph.update = function (self, o) { |
3088 | if (typeof(o) != 'undefined' && o !== null) { | |
3089 | for (var k in o) { | |
85b99f0b DV |
3090 | if (o.hasOwnProperty(k)) { |
3091 | self[k] = o[k]; | |
3092 | } | |
fc80a396 DV |
3093 | } |
3094 | } | |
3095 | return self; | |
3096 | }; | |
3097 | ||
2dda3850 DV |
3098 | Dygraph.isArrayLike = function (o) { |
3099 | var typ = typeof(o); | |
3100 | if ( | |
c21d2c2d | 3101 | (typ != 'object' && !(typ == 'function' && |
2dda3850 DV |
3102 | typeof(o.item) == 'function')) || |
3103 | o === null || | |
3104 | typeof(o.length) != 'number' || | |
3105 | o.nodeType === 3 | |
3106 | ) { | |
3107 | return false; | |
3108 | } | |
3109 | return true; | |
3110 | }; | |
3111 | ||
3112 | Dygraph.isDateLike = function (o) { | |
3113 | if (typeof(o) != "object" || o === null || | |
3114 | typeof(o.getTime) != 'function') { | |
3115 | return false; | |
3116 | } | |
3117 | return true; | |
3118 | }; | |
3119 | ||
e3ab7b40 DV |
3120 | Dygraph.clone = function(o) { |
3121 | // TODO(danvk): figure out how MochiKit's version works | |
3122 | var r = []; | |
3123 | for (var i = 0; i < o.length; i++) { | |
3124 | if (Dygraph.isArrayLike(o[i])) { | |
3125 | r.push(Dygraph.clone(o[i])); | |
3126 | } else { | |
3127 | r.push(o[i]); | |
3128 | } | |
3129 | } | |
3130 | return r; | |
24e5350c DV |
3131 | }; |
3132 | ||
2dda3850 | 3133 | |
79420a1e | 3134 | /** |
6a1aa64f DV |
3135 | * Get the CSV data. If it's in a function, call that function. If it's in a |
3136 | * file, do an XMLHttpRequest to get it. | |
3137 | * @private | |
3138 | */ | |
285a6bda | 3139 | Dygraph.prototype.start_ = function() { |
6a1aa64f | 3140 | if (typeof this.file_ == 'function') { |
285a6bda | 3141 | // CSV string. Pretend we got it via XHR. |
6a1aa64f | 3142 | this.loadedEvent_(this.file_()); |
2dda3850 | 3143 | } else if (Dygraph.isArrayLike(this.file_)) { |
285a6bda | 3144 | this.rawData_ = this.parseArray_(this.file_); |
26ca7938 | 3145 | this.predraw_(); |
79420a1e DV |
3146 | } else if (typeof this.file_ == 'object' && |
3147 | typeof this.file_.getColumnRange == 'function') { | |
3148 | // must be a DataTable from gviz. | |
a685723c | 3149 | this.parseDataTable_(this.file_); |
26ca7938 | 3150 | this.predraw_(); |
285a6bda DV |
3151 | } else if (typeof this.file_ == 'string') { |
3152 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. | |
3153 | if (this.file_.indexOf('\n') >= 0) { | |
3154 | this.loadedEvent_(this.file_); | |
3155 | } else { | |
3156 | var req = new XMLHttpRequest(); | |
3157 | var caller = this; | |
3158 | req.onreadystatechange = function () { | |
3159 | if (req.readyState == 4) { | |
3160 | if (req.status == 200) { | |
3161 | caller.loadedEvent_(req.responseText); | |
3162 | } | |
6a1aa64f | 3163 | } |
285a6bda | 3164 | }; |
6a1aa64f | 3165 | |
285a6bda DV |
3166 | req.open("GET", this.file_, true); |
3167 | req.send(null); | |
3168 | } | |
3169 | } else { | |
3170 | this.error("Unknown data format: " + (typeof this.file_)); | |
6a1aa64f DV |
3171 | } |
3172 | }; | |
3173 | ||
3174 | /** | |
3175 | * Changes various properties of the graph. These can include: | |
3176 | * <ul> | |
3177 | * <li>file: changes the source data for the graph</li> | |
3178 | * <li>errorBars: changes whether the data contains stddev</li> | |
3179 | * </ul> | |
3180 | * @param {Object} attrs The new properties and values | |
3181 | */ | |
285a6bda DV |
3182 | Dygraph.prototype.updateOptions = function(attrs) { |
3183 | // TODO(danvk): this is a mess. Rethink this function. | |
c65f2303 | 3184 | if ('rollPeriod' in attrs) { |
6a1aa64f DV |
3185 | this.rollPeriod_ = attrs.rollPeriod; |
3186 | } | |
c65f2303 | 3187 | if ('dateWindow' in attrs) { |
6a1aa64f | 3188 | this.dateWindow_ = attrs.dateWindow; |
81856f70 NN |
3189 | if (!('noZoomFlagChange' in attrs)) { |
3190 | this.zoomed_x_ = attrs.dateWindow != null; | |
3191 | } | |
b7e5862d | 3192 | } |
81856f70 | 3193 | if ('valueRange' in attrs && !('noZoomFlagChange' in attrs)) { |
b7e5862d | 3194 | this.zoomed_y_ = attrs.valueRange != null; |
6a1aa64f | 3195 | } |
450fe64b DV |
3196 | |
3197 | // TODO(danvk): validate per-series options. | |
46dde5f9 DV |
3198 | // Supported: |
3199 | // strokeWidth | |
3200 | // pointSize | |
3201 | // drawPoints | |
3202 | // highlightCircleSize | |
450fe64b | 3203 | |
fc80a396 | 3204 | Dygraph.update(this.user_attrs_, attrs); |
87bb7958 | 3205 | Dygraph.update(this.renderOptions_, attrs); |
285a6bda DV |
3206 | |
3207 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
3208 | ||
3209 | // TODO(danvk): this doesn't match the constructor logic | |
3210 | this.layout_.updateOptions({ 'errorBars': this.attr_("errorBars") }); | |
5e50289f | 3211 | if (attrs['file']) { |
6a1aa64f DV |
3212 | this.file_ = attrs['file']; |
3213 | this.start_(); | |
3214 | } else { | |
26ca7938 | 3215 | this.predraw_(); |
6a1aa64f DV |
3216 | } |
3217 | }; | |
3218 | ||
3219 | /** | |
697e70b2 DV |
3220 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
3221 | * containing div (which has presumably changed size since the dygraph was | |
3222 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
3223 | * |
3224 | * This is far more efficient than destroying and re-instantiating a | |
3225 | * Dygraph, since it doesn't have to reparse the underlying data. | |
3226 | * | |
697e70b2 DV |
3227 | * @param {Number} width Width (in pixels) |
3228 | * @param {Number} height Height (in pixels) | |
3229 | */ | |
3230 | Dygraph.prototype.resize = function(width, height) { | |
e8c7ef86 DV |
3231 | if (this.resize_lock) { |
3232 | return; | |
3233 | } | |
3234 | this.resize_lock = true; | |
3235 | ||
697e70b2 DV |
3236 | if ((width === null) != (height === null)) { |
3237 | this.warn("Dygraph.resize() should be called with zero parameters or " + | |
3238 | "two non-NULL parameters. Pretending it was zero."); | |
3239 | width = height = null; | |
3240 | } | |
3241 | ||
b16e6369 | 3242 | // TODO(danvk): there should be a clear() method. |
697e70b2 | 3243 | this.maindiv_.innerHTML = ""; |
b16e6369 DV |
3244 | this.attrs_.labelsDiv = null; |
3245 | ||
697e70b2 DV |
3246 | if (width) { |
3247 | this.maindiv_.style.width = width + "px"; | |
3248 | this.maindiv_.style.height = height + "px"; | |
3249 | this.width_ = width; | |
3250 | this.height_ = height; | |
3251 | } else { | |
3252 | this.width_ = this.maindiv_.offsetWidth; | |
3253 | this.height_ = this.maindiv_.offsetHeight; | |
3254 | } | |
3255 | ||
3256 | this.createInterface_(); | |
26ca7938 | 3257 | this.predraw_(); |
e8c7ef86 DV |
3258 | |
3259 | this.resize_lock = false; | |
697e70b2 DV |
3260 | }; |
3261 | ||
3262 | /** | |
6a1aa64f DV |
3263 | * Adjusts the number of days in the rolling average. Updates the graph to |
3264 | * reflect the new averaging period. | |
3265 | * @param {Number} length Number of days over which to average the data. | |
3266 | */ | |
285a6bda | 3267 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f | 3268 | this.rollPeriod_ = length; |
26ca7938 | 3269 | this.predraw_(); |
6a1aa64f | 3270 | }; |
540d00f1 | 3271 | |
f8cfec73 | 3272 | /** |
1cf11047 DV |
3273 | * Returns a boolean array of visibility statuses. |
3274 | */ | |
3275 | Dygraph.prototype.visibility = function() { | |
3276 | // Do lazy-initialization, so that this happens after we know the number of | |
3277 | // data series. | |
3278 | if (!this.attr_("visibility")) { | |
f38dec01 | 3279 | this.attrs_["visibility"] = []; |
1cf11047 DV |
3280 | } |
3281 | while (this.attr_("visibility").length < this.rawData_[0].length - 1) { | |
f38dec01 | 3282 | this.attr_("visibility").push(true); |
1cf11047 DV |
3283 | } |
3284 | return this.attr_("visibility"); | |
3285 | }; | |
3286 | ||
3287 | /** | |
3288 | * Changes the visiblity of a series. | |
3289 | */ | |
3290 | Dygraph.prototype.setVisibility = function(num, value) { | |
3291 | var x = this.visibility(); | |
a6c109c1 | 3292 | if (num < 0 || num >= x.length) { |
1cf11047 DV |
3293 | this.warn("invalid series number in setVisibility: " + num); |
3294 | } else { | |
3295 | x[num] = value; | |
26ca7938 | 3296 | this.predraw_(); |
1cf11047 DV |
3297 | } |
3298 | }; | |
3299 | ||
3300 | /** | |
5c528fa2 DV |
3301 | * Update the list of annotations and redraw the chart. |
3302 | */ | |
a685723c | 3303 | Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { |
3c51ab74 DV |
3304 | // Only add the annotation CSS rule once we know it will be used. |
3305 | Dygraph.addAnnotationRule(); | |
5c528fa2 DV |
3306 | this.annotations_ = ann; |
3307 | this.layout_.setAnnotations(this.annotations_); | |
a685723c | 3308 | if (!suppressDraw) { |
26ca7938 | 3309 | this.predraw_(); |
a685723c | 3310 | } |
5c528fa2 DV |
3311 | }; |
3312 | ||
3313 | /** | |
3314 | * Return the list of annotations. | |
3315 | */ | |
3316 | Dygraph.prototype.annotations = function() { | |
3317 | return this.annotations_; | |
3318 | }; | |
3319 | ||
46dde5f9 DV |
3320 | /** |
3321 | * Get the index of a series (column) given its name. The first column is the | |
3322 | * x-axis, so the data series start with index 1. | |
3323 | */ | |
3324 | Dygraph.prototype.indexFromSetName = function(name) { | |
3325 | var labels = this.attr_("labels"); | |
3326 | for (var i = 0; i < labels.length; i++) { | |
3327 | if (labels[i] == name) return i; | |
3328 | } | |
3329 | return null; | |
3330 | }; | |
3331 | ||
5c528fa2 DV |
3332 | Dygraph.addAnnotationRule = function() { |
3333 | if (Dygraph.addedAnnotationCSS) return; | |
3334 | ||
5c528fa2 DV |
3335 | var rule = "border: 1px solid black; " + |
3336 | "background-color: white; " + | |
3337 | "text-align: center;"; | |
22186871 DV |
3338 | |
3339 | var styleSheetElement = document.createElement("style"); | |
3340 | styleSheetElement.type = "text/css"; | |
3341 | document.getElementsByTagName("head")[0].appendChild(styleSheetElement); | |
3342 | ||
3343 | // Find the first style sheet that we can access. | |
3344 | // We may not add a rule to a style sheet from another domain for security | |
3345 | // reasons. This sometimes comes up when using gviz, since the Google gviz JS | |
3346 | // adds its own style sheets from google.com. | |
3347 | for (var i = 0; i < document.styleSheets.length; i++) { | |
3348 | if (document.styleSheets[i].disabled) continue; | |
3349 | var mysheet = document.styleSheets[i]; | |
3350 | try { | |
3351 | if (mysheet.insertRule) { // Firefox | |
3352 | var idx = mysheet.cssRules ? mysheet.cssRules.length : 0; | |
3353 | mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", idx); | |
3354 | } else if (mysheet.addRule) { // IE | |
3355 | mysheet.addRule(".dygraphDefaultAnnotation", rule); | |
3356 | } | |
3357 | Dygraph.addedAnnotationCSS = true; | |
3358 | return; | |
3359 | } catch(err) { | |
3360 | // Was likely a security exception. | |
3361 | } | |
5c528fa2 DV |
3362 | } |
3363 | ||
22186871 | 3364 | this.warn("Unable to add default annotation CSS rule; display may be off."); |
5c528fa2 DV |
3365 | } |
3366 | ||
3367 | /** | |
f8cfec73 DV |
3368 | * Create a new canvas element. This is more complex than a simple |
3369 | * document.createElement("canvas") because of IE and excanvas. | |
3370 | */ | |
3371 | Dygraph.createCanvas = function() { | |
3372 | var canvas = document.createElement("canvas"); | |
3373 | ||
3374 | isIE = (/MSIE/.test(navigator.userAgent) && !window.opera); | |
8b8f2d59 | 3375 | if (isIE && (typeof(G_vmlCanvasManager) != 'undefined')) { |
f8cfec73 DV |
3376 | canvas = G_vmlCanvasManager.initElement(canvas); |
3377 | } | |
3378 | ||
3379 | return canvas; | |
3380 | }; | |
3381 | ||
540d00f1 DV |
3382 | |
3383 | /** | |
285a6bda | 3384 | * A wrapper around Dygraph that implements the gviz API. |
540d00f1 DV |
3385 | * @param {Object} container The DOM object the visualization should live in. |
3386 | */ | |
285a6bda | 3387 | Dygraph.GVizChart = function(container) { |
540d00f1 DV |
3388 | this.container = container; |
3389 | } | |
3390 | ||
285a6bda | 3391 | Dygraph.GVizChart.prototype.draw = function(data, options) { |
c91f4ae8 DV |
3392 | // Clear out any existing dygraph. |
3393 | // TODO(danvk): would it make more sense to simply redraw using the current | |
3394 | // date_graph object? | |
540d00f1 | 3395 | this.container.innerHTML = ''; |
c91f4ae8 DV |
3396 | if (typeof(this.date_graph) != 'undefined') { |
3397 | this.date_graph.destroy(); | |
3398 | } | |
3399 | ||
285a6bda | 3400 | this.date_graph = new Dygraph(this.container, data, options); |
540d00f1 | 3401 | } |
285a6bda | 3402 | |
239c712d NAG |
3403 | /** |
3404 | * Google charts compatible setSelection | |
50360fd0 | 3405 | * Only row selection is supported, all points in the row will be highlighted |
239c712d NAG |
3406 | * @param {Array} array of the selected cells |
3407 | * @public | |
3408 | */ | |
3409 | Dygraph.GVizChart.prototype.setSelection = function(selection_array) { | |
3410 | var row = false; | |
3411 | if (selection_array.length) { | |
3412 | row = selection_array[0].row; | |
3413 | } | |
3414 | this.date_graph.setSelection(row); | |
3415 | } | |
3416 | ||
103b7292 NAG |
3417 | /** |
3418 | * Google charts compatible getSelection implementation | |
3419 | * @return {Array} array of the selected cells | |
3420 | * @public | |
3421 | */ | |
3422 | Dygraph.GVizChart.prototype.getSelection = function() { | |
3423 | var selection = []; | |
50360fd0 | 3424 | |
103b7292 | 3425 | var row = this.date_graph.getSelection(); |
50360fd0 | 3426 | |
103b7292 | 3427 | if (row < 0) return selection; |
50360fd0 | 3428 | |
103b7292 NAG |
3429 | col = 1; |
3430 | for (var i in this.date_graph.layout_.datasets) { | |
3431 | selection.push({row: row, column: col}); | |
3432 | col++; | |
3433 | } | |
3434 | ||
3435 | return selection; | |
3436 | } | |
3437 | ||
285a6bda DV |
3438 | // Older pages may still use this name. |
3439 | DateGraph = Dygraph; |