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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 | |
27 | ||
285a6bda | 28 | Date,SeriesA,SeriesB,... |
6a1aa64f DV |
29 | YYYYMMDD,A1,sigmaA1,B1,sigmaB1,... |
30 | YYYYMMDD,A2,sigmaA2,B2,sigmaB2,... | |
31 | ||
32 | If the 'fractions' option is set, the input should be of the form: | |
33 | ||
285a6bda | 34 | Date,SeriesA,SeriesB,... |
6a1aa64f DV |
35 | YYYYMMDD,A1/B1,A2/B2,... |
36 | YYYYMMDD,A1/B1,A2/B2,... | |
37 | ||
38 | And error bars will be calculated automatically using a binomial distribution. | |
39 | ||
ee672584 | 40 | For further documentation and examples, see http://dygraphs.com/ |
6a1aa64f DV |
41 | |
42 | */ | |
43 | ||
44 | /** | |
45 | * An interactive, zoomable graph | |
46 | * @param {String | Function} file A file containing CSV data or a function that | |
47 | * returns this data. The expected format for each line is | |
48 | * YYYYMMDD,val1,val2,... or, if attrs.errorBars is set, | |
49 | * YYYYMMDD,val1,stddev1,val2,stddev2,... | |
6a1aa64f DV |
50 | * @param {Object} attrs Various other attributes, e.g. errorBars determines |
51 | * whether the input data contains error ranges. | |
52 | */ | |
285a6bda DV |
53 | Dygraph = function(div, data, opts) { |
54 | if (arguments.length > 0) { | |
55 | if (arguments.length == 4) { | |
56 | // Old versions of dygraphs took in the series labels as a constructor | |
57 | // parameter. This doesn't make sense anymore, but it's easy to continue | |
58 | // to support this usage. | |
59 | this.warn("Using deprecated four-argument dygraph constructor"); | |
60 | this.__old_init__(div, data, arguments[2], arguments[3]); | |
61 | } else { | |
62 | this.__init__(div, data, opts); | |
63 | } | |
64 | } | |
6a1aa64f DV |
65 | }; |
66 | ||
285a6bda DV |
67 | Dygraph.NAME = "Dygraph"; |
68 | Dygraph.VERSION = "1.2"; | |
69 | Dygraph.__repr__ = function() { | |
6a1aa64f DV |
70 | return "[" + this.NAME + " " + this.VERSION + "]"; |
71 | }; | |
285a6bda | 72 | Dygraph.toString = function() { |
6a1aa64f DV |
73 | return this.__repr__(); |
74 | }; | |
75 | ||
76 | // Various default values | |
285a6bda DV |
77 | Dygraph.DEFAULT_ROLL_PERIOD = 1; |
78 | Dygraph.DEFAULT_WIDTH = 480; | |
79 | Dygraph.DEFAULT_HEIGHT = 320; | |
80 | Dygraph.AXIS_LINE_WIDTH = 0.3; | |
6a1aa64f | 81 | |
8e4a6af3 | 82 | // Default attribute values. |
285a6bda | 83 | Dygraph.DEFAULT_ATTRS = { |
a9fc39ab | 84 | highlightCircleSize: 3, |
8e4a6af3 | 85 | pixelsPerXLabel: 60, |
c6336f04 | 86 | pixelsPerYLabel: 30, |
285a6bda | 87 | |
8e4a6af3 DV |
88 | labelsDivWidth: 250, |
89 | labelsDivStyles: { | |
90 | // TODO(danvk): move defaults from createStatusMessage_ here. | |
285a6bda DV |
91 | }, |
92 | labelsSeparateLines: false, | |
bcd3ebf0 | 93 | labelsShowZeroValues: true, |
285a6bda | 94 | labelsKMB: false, |
afefbcdb | 95 | labelsKMG2: false, |
d160cc3b | 96 | showLabelsOnHighlight: true, |
12e4c741 | 97 | |
029da4b6 | 98 | yValueFormatter: function(x) { return Dygraph.round_(x, 2); }, |
285a6bda DV |
99 | |
100 | strokeWidth: 1.0, | |
8e4a6af3 | 101 | |
8846615a DV |
102 | axisTickSize: 3, |
103 | axisLabelFontSize: 14, | |
104 | xAxisLabelWidth: 50, | |
105 | yAxisLabelWidth: 50, | |
bf640e56 | 106 | xAxisLabelFormatter: Dygraph.dateAxisFormatter, |
8846615a | 107 | rightGap: 5, |
285a6bda DV |
108 | |
109 | showRoller: false, | |
110 | xValueFormatter: Dygraph.dateString_, | |
111 | xValueParser: Dygraph.dateParser, | |
112 | xTicker: Dygraph.dateTicker, | |
113 | ||
3d67f03b DV |
114 | delimiter: ',', |
115 | ||
ff00d3e2 | 116 | logScale: false, |
285a6bda DV |
117 | sigma: 2.0, |
118 | errorBars: false, | |
119 | fractions: false, | |
120 | wilsonInterval: true, // only relevant if fractions is true | |
5954ef32 | 121 | customBars: false, |
43af96e7 NK |
122 | fillGraph: false, |
123 | fillAlpha: 0.15, | |
f032c51d | 124 | connectSeparatedPoints: false, |
43af96e7 NK |
125 | |
126 | stackedGraph: false, | |
afdc483f NN |
127 | hideOverlayOnMouseOut: true, |
128 | ||
00c281d4 | 129 | stepPlot: false, |
ee672584 | 130 | avoidMinZero: false, |
285a6bda DV |
131 | }; |
132 | ||
133 | // Various logging levels. | |
134 | Dygraph.DEBUG = 1; | |
135 | Dygraph.INFO = 2; | |
136 | Dygraph.WARNING = 3; | |
137 | Dygraph.ERROR = 3; | |
138 | ||
39b0e098 RK |
139 | // Directions for panning and zooming. Use bit operations when combined |
140 | // values are possible. | |
141 | Dygraph.HORIZONTAL = 1; | |
142 | Dygraph.VERTICAL = 2; | |
143 | ||
5c528fa2 DV |
144 | // Used for initializing annotation CSS rules only once. |
145 | Dygraph.addedAnnotationCSS = false; | |
146 | ||
285a6bda DV |
147 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { |
148 | // Labels is no longer a constructor parameter, since it's typically set | |
149 | // directly from the data source. It also conains a name for the x-axis, | |
150 | // which the previous constructor form did not. | |
151 | if (labels != null) { | |
152 | var new_labels = ["Date"]; | |
153 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); | |
fc80a396 | 154 | Dygraph.update(attrs, { 'labels': new_labels }); |
285a6bda DV |
155 | } |
156 | this.__init__(div, file, attrs); | |
8e4a6af3 DV |
157 | }; |
158 | ||
6a1aa64f | 159 | /** |
285a6bda | 160 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
ee672584 | 161 | * and context <canvas> inside of it. See the constructor for details |
6a1aa64f | 162 | * on the parameters. |
12e4c741 | 163 | * @param {Element} div the Element to render the graph into. |
6a1aa64f | 164 | * @param {String | Function} file Source data |
6a1aa64f DV |
165 | * @param {Object} attrs Miscellaneous other options |
166 | * @private | |
167 | */ | |
285a6bda | 168 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
a2c8fff4 DV |
169 | // Hack for IE: if we're using excanvas and the document hasn't finished |
170 | // loading yet (and hence may not have initialized whatever it needs to | |
171 | // initialize), then keep calling this routine periodically until it has. | |
172 | if (/MSIE/.test(navigator.userAgent) && !window.opera && | |
173 | typeof(G_vmlCanvasManager) != 'undefined' && | |
174 | document.readyState != 'complete') { | |
175 | var self = this; | |
176 | setTimeout(function() { self.__init__(div, file, attrs) }, 100); | |
177 | } | |
178 | ||
285a6bda DV |
179 | // Support two-argument constructor |
180 | if (attrs == null) { attrs = {}; } | |
181 | ||
6a1aa64f | 182 | // Copy the important bits into the object |
32988383 | 183 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
6a1aa64f | 184 | this.maindiv_ = div; |
6a1aa64f | 185 | this.file_ = file; |
285a6bda | 186 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
6a1aa64f | 187 | this.previousVerticalX_ = -1; |
6a1aa64f | 188 | this.fractions_ = attrs.fractions || false; |
6a1aa64f | 189 | this.dateWindow_ = attrs.dateWindow || null; |
8b83c6cc | 190 | |
6a1aa64f | 191 | this.wilsonInterval_ = attrs.wilsonInterval || true; |
fe0b7c03 | 192 | this.is_initial_draw_ = true; |
5c528fa2 | 193 | this.annotations_ = []; |
8e4a6af3 | 194 | |
f7d6278e DV |
195 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
196 | // div, then only one will be drawn. | |
197 | div.innerHTML = ""; | |
198 | ||
c21d2c2d | 199 | // If the div isn't already sized then inherit from our attrs or |
200 | // give it a default size. | |
285a6bda | 201 | if (div.style.width == '') { |
ddd1b11f | 202 | div.style.width = (attrs.width || Dygraph.DEFAULT_WIDTH) + "px"; |
285a6bda DV |
203 | } |
204 | if (div.style.height == '') { | |
ddd1b11f | 205 | div.style.height = (attrs.height || Dygraph.DEFAULT_HEIGHT) + "px"; |
32988383 | 206 | } |
285a6bda DV |
207 | this.width_ = parseInt(div.style.width, 10); |
208 | this.height_ = parseInt(div.style.height, 10); | |
c21d2c2d | 209 | // The div might have been specified as percent of the current window size, |
210 | // convert that to an appropriate number of pixels. | |
211 | if (div.style.width.indexOf("%") == div.style.width.length - 1) { | |
c6f45033 | 212 | this.width_ = div.offsetWidth; |
c21d2c2d | 213 | } |
214 | if (div.style.height.indexOf("%") == div.style.height.length - 1) { | |
c6f45033 | 215 | this.height_ = div.offsetHeight; |
c21d2c2d | 216 | } |
32988383 | 217 | |
10a6456d DV |
218 | if (this.width_ == 0) { |
219 | this.error("dygraph has zero width. Please specify a width in pixels."); | |
220 | } | |
221 | if (this.height_ == 0) { | |
222 | this.error("dygraph has zero height. Please specify a height in pixels."); | |
223 | } | |
224 | ||
344ba8c0 | 225 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
43af96e7 NK |
226 | if (attrs['stackedGraph']) { |
227 | attrs['fillGraph'] = true; | |
228 | // TODO(nikhilk): Add any other stackedGraph checks here. | |
229 | } | |
230 | ||
285a6bda DV |
231 | // Dygraphs has many options, some of which interact with one another. |
232 | // To keep track of everything, we maintain two sets of options: | |
233 | // | |
c21d2c2d | 234 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
235 | // this.attrs_ defaults, options derived from user_attrs_, data. |
236 | // | |
237 | // Options are then accessed this.attr_('attr'), which first looks at | |
238 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
239 | // defaults without overriding behavior that the user specifically asks for. | |
240 | this.user_attrs_ = {}; | |
fc80a396 | 241 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 242 | |
285a6bda | 243 | this.attrs_ = {}; |
fc80a396 | 244 | Dygraph.update(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 245 | |
16269f6e | 246 | this.boundaryIds_ = []; |
6a1aa64f | 247 | |
285a6bda DV |
248 | // Make a note of whether labels will be pulled from the CSV file. |
249 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
6a1aa64f DV |
250 | |
251 | // Create the containing DIV and other interactive elements | |
252 | this.createInterface_(); | |
253 | ||
738fc797 | 254 | this.start_(); |
6a1aa64f DV |
255 | }; |
256 | ||
227b93cc DV |
257 | Dygraph.prototype.attr_ = function(name, seriesName) { |
258 | if (seriesName && | |
259 | typeof(this.user_attrs_[seriesName]) != 'undefined' && | |
260 | this.user_attrs_[seriesName] != null && | |
261 | typeof(this.user_attrs_[seriesName][name]) != 'undefined') { | |
262 | return this.user_attrs_[seriesName][name]; | |
450fe64b | 263 | } else if (typeof(this.user_attrs_[name]) != 'undefined') { |
285a6bda DV |
264 | return this.user_attrs_[name]; |
265 | } else if (typeof(this.attrs_[name]) != 'undefined') { | |
266 | return this.attrs_[name]; | |
267 | } else { | |
268 | return null; | |
269 | } | |
270 | }; | |
271 | ||
272 | // TODO(danvk): any way I can get the line numbers to be this.warn call? | |
273 | Dygraph.prototype.log = function(severity, message) { | |
274 | if (typeof(console) != 'undefined') { | |
275 | switch (severity) { | |
276 | case Dygraph.DEBUG: | |
277 | console.debug('dygraphs: ' + message); | |
278 | break; | |
279 | case Dygraph.INFO: | |
280 | console.info('dygraphs: ' + message); | |
281 | break; | |
282 | case Dygraph.WARNING: | |
283 | console.warn('dygraphs: ' + message); | |
284 | break; | |
285 | case Dygraph.ERROR: | |
286 | console.error('dygraphs: ' + message); | |
287 | break; | |
288 | } | |
289 | } | |
290 | } | |
291 | Dygraph.prototype.info = function(message) { | |
292 | this.log(Dygraph.INFO, message); | |
293 | } | |
294 | Dygraph.prototype.warn = function(message) { | |
295 | this.log(Dygraph.WARNING, message); | |
296 | } | |
297 | Dygraph.prototype.error = function(message) { | |
298 | this.log(Dygraph.ERROR, message); | |
299 | } | |
300 | ||
6a1aa64f DV |
301 | /** |
302 | * Returns the current rolling period, as set by the user or an option. | |
303 | * @return {Number} The number of days in the rolling window | |
304 | */ | |
285a6bda | 305 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 306 | return this.rollPeriod_; |
76171648 DV |
307 | }; |
308 | ||
599fb4ad DV |
309 | /** |
310 | * Returns the currently-visible x-range. This can be affected by zooming, | |
311 | * panning or a call to updateOptions. | |
312 | * Returns a two-element array: [left, right]. | |
313 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
314 | */ | |
315 | Dygraph.prototype.xAxisRange = function() { | |
316 | if (this.dateWindow_) return this.dateWindow_; | |
317 | ||
318 | // The entire chart is visible. | |
319 | var left = this.rawData_[0][0]; | |
320 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
321 | return [left, right]; | |
322 | }; | |
323 | ||
3230c662 | 324 | /** |
d58ae307 DV |
325 | * Returns the currently-visible y-range for an axis. This can be affected by |
326 | * zooming, panning or a call to updateOptions. Axis indices are zero-based. If | |
327 | * called with no arguments, returns the range of the first axis. | |
3230c662 DV |
328 | * Returns a two-element array: [bottom, top]. |
329 | */ | |
d58ae307 | 330 | Dygraph.prototype.yAxisRange = function(idx) { |
d63e6799 | 331 | if (typeof(idx) == "undefined") idx = 0; |
d58ae307 DV |
332 | if (idx < 0 || idx >= this.axes_.length) return null; |
333 | return [ this.axes_[idx].computedValueRange[0], | |
334 | this.axes_[idx].computedValueRange[1] ]; | |
335 | }; | |
336 | ||
337 | /** | |
338 | * Returns the currently-visible y-ranges for each axis. This can be affected by | |
339 | * zooming, panning, calls to updateOptions, etc. | |
340 | * Returns an array of [bottom, top] pairs, one for each y-axis. | |
341 | */ | |
342 | Dygraph.prototype.yAxisRanges = function() { | |
343 | var ret = []; | |
344 | for (var i = 0; i < this.axes_.length; i++) { | |
345 | ret.push(this.yAxisRange(i)); | |
346 | } | |
347 | return ret; | |
3230c662 DV |
348 | }; |
349 | ||
d58ae307 | 350 | // TODO(danvk): use these functions throughout dygraphs. |
3230c662 DV |
351 | /** |
352 | * Convert from data coordinates to canvas/div X/Y coordinates. | |
d58ae307 DV |
353 | * If specified, do this conversion for the coordinate system of a particular |
354 | * axis. Uses the first axis by default. | |
3230c662 DV |
355 | * Returns a two-element array: [X, Y] |
356 | */ | |
d58ae307 | 357 | Dygraph.prototype.toDomCoords = function(x, y, axis) { |
3230c662 DV |
358 | var ret = [null, null]; |
359 | var area = this.plotter_.area; | |
360 | if (x !== null) { | |
361 | var xRange = this.xAxisRange(); | |
362 | ret[0] = area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; | |
363 | } | |
364 | ||
365 | if (y !== null) { | |
d58ae307 | 366 | var yRange = this.yAxisRange(axis); |
891ad846 | 367 | ret[1] = area.y + (yRange[1] - y) / (yRange[1] - yRange[0]) * area.h; |
3230c662 DV |
368 | } |
369 | ||
370 | return ret; | |
371 | }; | |
372 | ||
373 | /** | |
374 | * Convert from canvas/div coords to data coordinates. | |
d58ae307 DV |
375 | * If specified, do this conversion for the coordinate system of a particular |
376 | * axis. Uses the first axis by default. | |
3230c662 DV |
377 | * Returns a two-element array: [X, Y] |
378 | */ | |
d58ae307 | 379 | Dygraph.prototype.toDataCoords = function(x, y, axis) { |
3230c662 DV |
380 | var ret = [null, null]; |
381 | var area = this.plotter_.area; | |
382 | if (x !== null) { | |
383 | var xRange = this.xAxisRange(); | |
384 | ret[0] = xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); | |
385 | } | |
386 | ||
387 | if (y !== null) { | |
d58ae307 | 388 | var yRange = this.yAxisRange(axis); |
3230c662 DV |
389 | ret[1] = yRange[0] + (area.h - y) / area.h * (yRange[1] - yRange[0]); |
390 | } | |
391 | ||
392 | return ret; | |
393 | }; | |
394 | ||
e99fde05 DV |
395 | /** |
396 | * Returns the number of columns (including the independent variable). | |
397 | */ | |
398 | Dygraph.prototype.numColumns = function() { | |
399 | return this.rawData_[0].length; | |
400 | }; | |
401 | ||
402 | /** | |
403 | * Returns the number of rows (excluding any header/label row). | |
404 | */ | |
405 | Dygraph.prototype.numRows = function() { | |
406 | return this.rawData_.length; | |
407 | }; | |
408 | ||
409 | /** | |
410 | * Returns the value in the given row and column. If the row and column exceed | |
411 | * the bounds on the data, returns null. Also returns null if the value is | |
412 | * missing. | |
413 | */ | |
414 | Dygraph.prototype.getValue = function(row, col) { | |
415 | if (row < 0 || row > this.rawData_.length) return null; | |
416 | if (col < 0 || col > this.rawData_[row].length) return null; | |
417 | ||
418 | return this.rawData_[row][col]; | |
419 | }; | |
420 | ||
76171648 DV |
421 | Dygraph.addEvent = function(el, evt, fn) { |
422 | var normed_fn = function(e) { | |
423 | if (!e) var e = window.event; | |
424 | fn(e); | |
425 | }; | |
426 | if (window.addEventListener) { // Mozilla, Netscape, Firefox | |
427 | el.addEventListener(evt, normed_fn, false); | |
428 | } else { // IE | |
429 | el.attachEvent('on' + evt, normed_fn); | |
430 | } | |
431 | }; | |
6a1aa64f | 432 | |
ee672584 RK |
433 | |
434 | // | |
435 | // An attempt at scroll wheel management. | |
436 | // | |
437 | // Based on the article at | |
438 | // http://www.switchonthecode.com/tutorials/javascript-tutorial-the-scroll-wheel | |
439 | ||
440 | Dygraph.cancelEvent = function(e) { | |
441 | e = e ? e : window.event; | |
442 | if (e.stopPropagation) { | |
443 | e.stopPropagation(); | |
444 | } | |
445 | if (e.preventDefault) { | |
446 | e.preventDefault(); | |
447 | } | |
448 | e.cancelBubble = true; | |
449 | e.cancel = true; | |
450 | e.returnValue = false; | |
451 | return false; | |
452 | } | |
453 | ||
454 | ||
6a1aa64f | 455 | /** |
285a6bda | 456 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 457 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 458 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
459 | * @private |
460 | */ | |
285a6bda | 461 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
462 | // Create the all-enclosing graph div |
463 | var enclosing = this.maindiv_; | |
464 | ||
b0c3b730 DV |
465 | this.graphDiv = document.createElement("div"); |
466 | this.graphDiv.style.width = this.width_ + "px"; | |
467 | this.graphDiv.style.height = this.height_ + "px"; | |
468 | enclosing.appendChild(this.graphDiv); | |
469 | ||
470 | // Create the canvas for interactive parts of the chart. | |
f8cfec73 | 471 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 DV |
472 | this.canvas_.style.position = "absolute"; |
473 | this.canvas_.width = this.width_; | |
474 | this.canvas_.height = this.height_; | |
f8cfec73 DV |
475 | this.canvas_.style.width = this.width_ + "px"; // for IE |
476 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
b0c3b730 DV |
477 | |
478 | // ... and for static parts of the chart. | |
6a1aa64f | 479 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
76171648 | 480 | |
eb7bf005 EC |
481 | // The interactive parts of the graph are drawn on top of the chart. |
482 | this.graphDiv.appendChild(this.hidden_); | |
483 | this.graphDiv.appendChild(this.canvas_); | |
484 | this.mouseEventElement_ = this.canvas_; | |
485 | ||
76171648 | 486 | var dygraph = this; |
eb7bf005 | 487 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(e) { |
76171648 DV |
488 | dygraph.mouseMove_(e); |
489 | }); | |
eb7bf005 | 490 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(e) { |
76171648 DV |
491 | dygraph.mouseOut_(e); |
492 | }); | |
697e70b2 DV |
493 | |
494 | // Create the grapher | |
495 | // TODO(danvk): why does the Layout need its own set of options? | |
496 | this.layoutOptions_ = { 'xOriginIsZero': false }; | |
497 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
498 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
499 | Dygraph.update(this.layoutOptions_, { | |
500 | 'errorBars': (this.attr_("errorBars") || this.attr_("customBars")) }); | |
501 | ||
502 | this.layout_ = new DygraphLayout(this, this.layoutOptions_); | |
503 | ||
504 | // TODO(danvk): why does the Renderer need its own set of options? | |
505 | this.renderOptions_ = { colorScheme: this.colors_, | |
506 | strokeColor: null, | |
507 | axisLineWidth: Dygraph.AXIS_LINE_WIDTH }; | |
508 | Dygraph.update(this.renderOptions_, this.attrs_); | |
509 | Dygraph.update(this.renderOptions_, this.user_attrs_); | |
697e70b2 DV |
510 | |
511 | this.createStatusMessage_(); | |
697e70b2 | 512 | this.createDragInterface_(); |
4cfcc38c DV |
513 | }; |
514 | ||
515 | /** | |
516 | * Detach DOM elements in the dygraph and null out all data references. | |
517 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
518 | * usage. See, e.g., the tests/perf.html example. | |
519 | */ | |
520 | Dygraph.prototype.destroy = function() { | |
521 | var removeRecursive = function(node) { | |
522 | while (node.hasChildNodes()) { | |
523 | removeRecursive(node.firstChild); | |
524 | node.removeChild(node.firstChild); | |
525 | } | |
526 | }; | |
527 | removeRecursive(this.maindiv_); | |
528 | ||
529 | var nullOut = function(obj) { | |
530 | for (var n in obj) { | |
531 | if (typeof(obj[n]) === 'object') { | |
532 | obj[n] = null; | |
533 | } | |
534 | } | |
535 | }; | |
536 | ||
537 | // These may not all be necessary, but it can't hurt... | |
538 | nullOut(this.layout_); | |
539 | nullOut(this.plotter_); | |
540 | nullOut(this); | |
541 | }; | |
6a1aa64f DV |
542 | |
543 | /** | |
544 | * Creates the canvas containing the PlotKit graph. Only plotkit ever draws on | |
285a6bda | 545 | * this particular canvas. All Dygraph work is done on this.canvas_. |
8846615a | 546 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
547 | * @return {Object} The newly-created canvas |
548 | * @private | |
549 | */ | |
285a6bda | 550 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 | 551 | var h = Dygraph.createCanvas(); |
6a1aa64f | 552 | h.style.position = "absolute"; |
9ac5e4ae DV |
553 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
554 | // some extra area to make it easier to zoom in on the far left and far | |
555 | // right. h needs to be precisely the plot area, so that clipping occurs. | |
6a1aa64f DV |
556 | h.style.top = canvas.style.top; |
557 | h.style.left = canvas.style.left; | |
558 | h.width = this.width_; | |
559 | h.height = this.height_; | |
f8cfec73 DV |
560 | h.style.width = this.width_ + "px"; // for IE |
561 | h.style.height = this.height_ + "px"; // for IE | |
6a1aa64f DV |
562 | return h; |
563 | }; | |
564 | ||
f474c2a3 DV |
565 | // Taken from MochiKit.Color |
566 | Dygraph.hsvToRGB = function (hue, saturation, value) { | |
567 | var red; | |
568 | var green; | |
569 | var blue; | |
570 | if (saturation === 0) { | |
571 | red = value; | |
572 | green = value; | |
573 | blue = value; | |
574 | } else { | |
575 | var i = Math.floor(hue * 6); | |
576 | var f = (hue * 6) - i; | |
577 | var p = value * (1 - saturation); | |
578 | var q = value * (1 - (saturation * f)); | |
579 | var t = value * (1 - (saturation * (1 - f))); | |
580 | switch (i) { | |
581 | case 1: red = q; green = value; blue = p; break; | |
582 | case 2: red = p; green = value; blue = t; break; | |
583 | case 3: red = p; green = q; blue = value; break; | |
584 | case 4: red = t; green = p; blue = value; break; | |
585 | case 5: red = value; green = p; blue = q; break; | |
586 | case 6: // fall through | |
587 | case 0: red = value; green = t; blue = p; break; | |
588 | } | |
589 | } | |
590 | red = Math.floor(255 * red + 0.5); | |
591 | green = Math.floor(255 * green + 0.5); | |
592 | blue = Math.floor(255 * blue + 0.5); | |
593 | return 'rgb(' + red + ',' + green + ',' + blue + ')'; | |
594 | }; | |
595 | ||
596 | ||
6a1aa64f DV |
597 | /** |
598 | * Generate a set of distinct colors for the data series. This is done with a | |
599 | * color wheel. Saturation/Value are customizable, and the hue is | |
600 | * equally-spaced around the color wheel. If a custom set of colors is | |
601 | * specified, that is used instead. | |
6a1aa64f DV |
602 | * @private |
603 | */ | |
285a6bda DV |
604 | Dygraph.prototype.setColors_ = function() { |
605 | // TODO(danvk): compute this directly into this.attrs_['colorScheme'] and do | |
606 | // away with this.renderOptions_. | |
607 | var num = this.attr_("labels").length - 1; | |
6a1aa64f | 608 | this.colors_ = []; |
285a6bda DV |
609 | var colors = this.attr_('colors'); |
610 | if (!colors) { | |
611 | var sat = this.attr_('colorSaturation') || 1.0; | |
612 | var val = this.attr_('colorValue') || 0.5; | |
2aa21213 | 613 | var half = Math.ceil(num / 2); |
6a1aa64f | 614 | for (var i = 1; i <= num; i++) { |
ec1959eb | 615 | if (!this.visibility()[i-1]) continue; |
43af96e7 | 616 | // alternate colors for high contrast. |
2aa21213 | 617 | var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2); |
43af96e7 NK |
618 | var hue = (1.0 * idx/ (1 + num)); |
619 | this.colors_.push(Dygraph.hsvToRGB(hue, sat, val)); | |
6a1aa64f DV |
620 | } |
621 | } else { | |
622 | for (var i = 0; i < num; i++) { | |
ec1959eb | 623 | if (!this.visibility()[i]) continue; |
285a6bda | 624 | var colorStr = colors[i % colors.length]; |
f474c2a3 | 625 | this.colors_.push(colorStr); |
6a1aa64f DV |
626 | } |
627 | } | |
285a6bda | 628 | |
c21d2c2d | 629 | // TODO(danvk): update this w/r/t/ the new options system. |
285a6bda | 630 | this.renderOptions_.colorScheme = this.colors_; |
fc80a396 DV |
631 | Dygraph.update(this.plotter_.options, this.renderOptions_); |
632 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
633 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
6a1aa64f DV |
634 | } |
635 | ||
43af96e7 NK |
636 | /** |
637 | * Return the list of colors. This is either the list of colors passed in the | |
638 | * attributes, or the autogenerated list of rgb(r,g,b) strings. | |
639 | * @return {Array<string>} The list of colors. | |
640 | */ | |
641 | Dygraph.prototype.getColors = function() { | |
642 | return this.colors_; | |
643 | }; | |
644 | ||
5e60386d DV |
645 | // The following functions are from quirksmode.org with a modification for Safari from |
646 | // http://blog.firetree.net/2005/07/04/javascript-find-position/ | |
3df0ccf0 DV |
647 | // http://www.quirksmode.org/js/findpos.html |
648 | Dygraph.findPosX = function(obj) { | |
649 | var curleft = 0; | |
5e60386d | 650 | if(obj.offsetParent) |
50360fd0 | 651 | while(1) |
5e60386d | 652 | { |
3df0ccf0 | 653 | curleft += obj.offsetLeft; |
5e60386d DV |
654 | if(!obj.offsetParent) |
655 | break; | |
3df0ccf0 DV |
656 | obj = obj.offsetParent; |
657 | } | |
5e60386d | 658 | else if(obj.x) |
3df0ccf0 DV |
659 | curleft += obj.x; |
660 | return curleft; | |
661 | }; | |
c21d2c2d | 662 | |
3df0ccf0 DV |
663 | Dygraph.findPosY = function(obj) { |
664 | var curtop = 0; | |
5e60386d DV |
665 | if(obj.offsetParent) |
666 | while(1) | |
667 | { | |
3df0ccf0 | 668 | curtop += obj.offsetTop; |
5e60386d DV |
669 | if(!obj.offsetParent) |
670 | break; | |
3df0ccf0 DV |
671 | obj = obj.offsetParent; |
672 | } | |
5e60386d | 673 | else if(obj.y) |
3df0ccf0 DV |
674 | curtop += obj.y; |
675 | return curtop; | |
676 | }; | |
677 | ||
5e60386d | 678 | |
71a11a8e | 679 | |
6a1aa64f DV |
680 | /** |
681 | * Create the div that contains information on the selected point(s) | |
682 | * This goes in the top right of the canvas, unless an external div has already | |
683 | * been specified. | |
684 | * @private | |
685 | */ | |
fedbd797 | 686 | Dygraph.prototype.createStatusMessage_ = function() { |
687 | var userLabelsDiv = this.user_attrs_["labelsDiv"]; | |
688 | if (userLabelsDiv && null != userLabelsDiv | |
689 | && (typeof(userLabelsDiv) == "string" || userLabelsDiv instanceof String)) { | |
690 | this.user_attrs_["labelsDiv"] = document.getElementById(userLabelsDiv); | |
691 | } | |
285a6bda DV |
692 | if (!this.attr_("labelsDiv")) { |
693 | var divWidth = this.attr_('labelsDivWidth'); | |
b0c3b730 | 694 | var messagestyle = { |
6a1aa64f DV |
695 | "position": "absolute", |
696 | "fontSize": "14px", | |
697 | "zIndex": 10, | |
698 | "width": divWidth + "px", | |
699 | "top": "0px", | |
8846615a | 700 | "left": (this.width_ - divWidth - 2) + "px", |
6a1aa64f DV |
701 | "background": "white", |
702 | "textAlign": "left", | |
b0c3b730 | 703 | "overflow": "hidden"}; |
fc80a396 | 704 | Dygraph.update(messagestyle, this.attr_('labelsDivStyles')); |
b0c3b730 DV |
705 | var div = document.createElement("div"); |
706 | for (var name in messagestyle) { | |
85b99f0b DV |
707 | if (messagestyle.hasOwnProperty(name)) { |
708 | div.style[name] = messagestyle[name]; | |
709 | } | |
b0c3b730 DV |
710 | } |
711 | this.graphDiv.appendChild(div); | |
285a6bda | 712 | this.attrs_.labelsDiv = div; |
6a1aa64f DV |
713 | } |
714 | }; | |
715 | ||
716 | /** | |
0abfbd7e DV |
717 | * Position the labels div so that its right edge is flush with the right edge |
718 | * of the charting area. | |
719 | */ | |
720 | Dygraph.prototype.positionLabelsDiv_ = function() { | |
721 | // Don't touch a user-specified labelsDiv. | |
722 | if (this.user_attrs_.hasOwnProperty("labelsDiv")) return; | |
723 | ||
724 | var area = this.plotter_.area; | |
725 | var div = this.attr_("labelsDiv"); | |
8c21adcf | 726 | div.style.left = area.x + area.w - this.attr_("labelsDivWidth") - 1 + "px"; |
0abfbd7e DV |
727 | }; |
728 | ||
729 | /** | |
6a1aa64f | 730 | * Create the text box to adjust the averaging period |
6a1aa64f DV |
731 | * @private |
732 | */ | |
285a6bda | 733 | Dygraph.prototype.createRollInterface_ = function() { |
8c69de65 DV |
734 | // Create a roller if one doesn't exist already. |
735 | if (!this.roller_) { | |
736 | this.roller_ = document.createElement("input"); | |
737 | this.roller_.type = "text"; | |
738 | this.roller_.style.display = "none"; | |
739 | this.graphDiv.appendChild(this.roller_); | |
740 | } | |
741 | ||
742 | var display = this.attr_('showRoller') ? 'block' : 'none'; | |
26ca7938 | 743 | |
b0c3b730 DV |
744 | var textAttr = { "position": "absolute", |
745 | "zIndex": 10, | |
746 | "top": (this.plotter_.area.h - 25) + "px", | |
747 | "left": (this.plotter_.area.x + 1) + "px", | |
748 | "display": display | |
6a1aa64f | 749 | }; |
8c69de65 DV |
750 | this.roller_.size = "2"; |
751 | this.roller_.value = this.rollPeriod_; | |
b0c3b730 | 752 | for (var name in textAttr) { |
85b99f0b | 753 | if (textAttr.hasOwnProperty(name)) { |
8c69de65 | 754 | this.roller_.style[name] = textAttr[name]; |
85b99f0b | 755 | } |
b0c3b730 DV |
756 | } |
757 | ||
76171648 | 758 | var dygraph = this; |
8c69de65 | 759 | this.roller_.onchange = function() { dygraph.adjustRoll(dygraph.roller_.value); }; |
76171648 DV |
760 | }; |
761 | ||
762 | // These functions are taken from MochiKit.Signal | |
763 | Dygraph.pageX = function(e) { | |
764 | if (e.pageX) { | |
765 | return (!e.pageX || e.pageX < 0) ? 0 : e.pageX; | |
766 | } else { | |
767 | var de = document; | |
768 | var b = document.body; | |
769 | return e.clientX + | |
770 | (de.scrollLeft || b.scrollLeft) - | |
771 | (de.clientLeft || 0); | |
772 | } | |
773 | }; | |
774 | ||
775 | Dygraph.pageY = function(e) { | |
776 | if (e.pageY) { | |
777 | return (!e.pageY || e.pageY < 0) ? 0 : e.pageY; | |
778 | } else { | |
779 | var de = document; | |
780 | var b = document.body; | |
781 | return e.clientY + | |
782 | (de.scrollTop || b.scrollTop) - | |
783 | (de.clientTop || 0); | |
784 | } | |
785 | }; | |
6a1aa64f | 786 | |
ee672584 RK |
787 | Dygraph.prototype.dragGetX_ = function(e, context) { |
788 | return Dygraph.pageX(e) - context.px | |
789 | }; | |
6a1aa64f | 790 | |
ee672584 RK |
791 | Dygraph.prototype.dragGetY_ = function(e, context) { |
792 | return Dygraph.pageY(e) - context.py | |
793 | }; | |
e3489f4f | 794 | |
ee672584 RK |
795 | Dygraph.startPan = function(event, g, context) { |
796 | // have to be zoomed in to pan. | |
797 | var zoomedY = false; | |
798 | for (var i = 0; i < g.axes_.length; i++) { | |
799 | if (g.axes_[i].valueWindow || g.axes_[i].valueRange) { | |
800 | zoomedY = true; | |
801 | break; | |
802 | } | |
803 | } | |
804 | if (!g.dateWindow_ && !zoomedY) return; | |
805 | ||
806 | context.isPanning = true; | |
807 | var xRange = g.xAxisRange(); | |
808 | context.dateRange = xRange[1] - xRange[0]; | |
809 | ||
810 | // Record the range of each y-axis at the start of the drag. | |
811 | // If any axis has a valueRange or valueWindow, then we want a 2D pan. | |
812 | context.is2DPan = false; | |
813 | for (var i = 0; i < g.axes_.length; i++) { | |
814 | var axis = g.axes_[i]; | |
815 | var yRange = g.yAxisRange(i); | |
816 | axis.dragValueRange = yRange[1] - yRange[0]; | |
817 | var r = g.toDataCoords(null, context.dragStartY, i); | |
818 | axis.draggingValue = r[1]; | |
819 | if (axis.valueWindow || axis.valueRange) context.is2DPan = true; | |
820 | } | |
821 | ||
822 | // TODO(konigsberg): Switch from all this math to toDataCoords? | |
823 | // Seems to work for the dragging value. | |
824 | context.draggingDate = (context.dragStartX / g.width_) * context.dateRange + xRange[0]; | |
825 | }; | |
826 | ||
827 | Dygraph.movePan = function(event, g, context) { | |
828 | context.dragEndX = g.dragGetX_(event, context); | |
829 | context.dragEndY = g.dragGetY_(event, context); | |
e3489f4f | 830 | |
d58ae307 | 831 | // TODO(danvk): update this comment |
ee672584 RK |
832 | // Want to have it so that: |
833 | // 1. draggingDate appears at dragEndX, draggingValue appears at dragEndY. | |
834 | // 2. daterange = (dateWindow_[1] - dateWindow_[0]) is unaltered. | |
835 | // 3. draggingValue appears at dragEndY. | |
836 | // 4. valueRange is unaltered. | |
837 | ||
838 | var minDate = context.draggingDate - (context.dragEndX / g.width_) * context.dateRange; | |
839 | var maxDate = minDate + context.dateRange; | |
840 | g.dateWindow_ = [minDate, maxDate]; | |
841 | ||
842 | // y-axis scaling is automatic unless this is a full 2D pan. | |
843 | if (context.is2DPan) { | |
844 | // Adjust each axis appropriately. | |
845 | var y_frac = context.dragEndY / g.height_; | |
846 | for (var i = 0; i < g.axes_.length; i++) { | |
847 | var axis = g.axes_[i]; | |
848 | var maxValue = axis.draggingValue + y_frac * axis.dragValueRange; | |
849 | var minValue = maxValue - axis.dragValueRange; | |
850 | axis.valueWindow = [ minValue, maxValue ]; | |
851 | } | |
852 | } | |
853 | ||
854 | g.drawGraph_(); | |
855 | } | |
856 | ||
857 | Dygraph.endPan = function(event, g, context) { | |
858 | context.isPanning = false; | |
859 | context.is2DPan = false; | |
860 | context.draggingDate = null; | |
861 | context.dateRange = null; | |
862 | context.valueRange = null; | |
863 | } | |
864 | ||
865 | Dygraph.startZoom = function(event, g, context) { | |
866 | context.isZooming = true; | |
867 | } | |
868 | ||
869 | Dygraph.moveZoom = function(event, g, context) { | |
870 | context.dragEndX = g.dragGetX_(event, context); | |
871 | context.dragEndY = g.dragGetY_(event, context); | |
872 | ||
873 | var xDelta = Math.abs(context.dragStartX - context.dragEndX); | |
874 | var yDelta = Math.abs(context.dragStartY - context.dragEndY); | |
875 | ||
876 | // drag direction threshold for y axis is twice as large as x axis | |
877 | context.dragDirection = (xDelta < yDelta / 2) ? Dygraph.VERTICAL : Dygraph.HORIZONTAL; | |
878 | ||
879 | g.drawZoomRect_( | |
880 | context.dragDirection, | |
881 | context.dragStartX, | |
882 | context.dragEndX, | |
883 | context.dragStartY, | |
884 | context.dragEndY, | |
885 | context.prevDragDirection, | |
886 | context.prevEndX, | |
887 | context.prevEndY); | |
888 | ||
889 | context.prevEndX = context.dragEndX; | |
890 | context.prevEndY = context.dragEndY; | |
891 | context.prevDragDirection = context.dragDirection; | |
892 | } | |
893 | ||
894 | Dygraph.endZoom = function(event, g, context) { | |
895 | context.isZooming = false; | |
896 | context.dragEndX = g.dragGetX_(event, context); | |
897 | context.dragEndY = g.dragGetY_(event, context); | |
898 | var regionWidth = Math.abs(context.dragEndX - context.dragStartX); | |
899 | var regionHeight = Math.abs(context.dragEndY - context.dragStartY); | |
900 | ||
901 | if (regionWidth < 2 && regionHeight < 2 && | |
902 | g.lastx_ != undefined && g.lastx_ != -1) { | |
903 | // TODO(danvk): pass along more info about the points, e.g. 'x' | |
904 | if (g.attr_('clickCallback') != null) { | |
905 | g.attr_('clickCallback')(event, g.lastx_, g.selPoints_); | |
906 | } | |
907 | if (g.attr_('pointClickCallback')) { | |
908 | // check if the click was on a particular point. | |
909 | var closestIdx = -1; | |
910 | var closestDistance = 0; | |
911 | for (var i = 0; i < g.selPoints_.length; i++) { | |
912 | var p = g.selPoints_[i]; | |
913 | var distance = Math.pow(p.canvasx - context.dragEndX, 2) + | |
914 | Math.pow(p.canvasy - context.dragEndY, 2); | |
915 | if (closestIdx == -1 || distance < closestDistance) { | |
916 | closestDistance = distance; | |
917 | closestIdx = i; | |
d58ae307 | 918 | } |
74f09e22 | 919 | } |
bce01b0f | 920 | |
ee672584 RK |
921 | // Allow any click within two pixels of the dot. |
922 | var radius = g.attr_('highlightCircleSize') + 2; | |
923 | if (closestDistance <= 5 * 5) { | |
924 | g.attr_('pointClickCallback')(event, g.selPoints_[closestIdx]); | |
925 | } | |
6a1aa64f | 926 | } |
ee672584 | 927 | } |
6a1aa64f | 928 | |
ee672584 RK |
929 | if (regionWidth >= 10 && context.dragDirection == Dygraph.HORIZONTAL) { |
930 | g.doZoomX_(Math.min(context.dragStartX, context.dragEndX), | |
931 | Math.max(context.dragStartX, context.dragEndX)); | |
932 | } else if (regionHeight >= 10 && context.dragDirection == Dygraph.VERTICAL) { | |
933 | g.doZoomY_(Math.min(context.dragStartY, context.dragEndY), | |
934 | Math.max(context.dragStartY, context.dragEndY)); | |
935 | } else { | |
936 | g.canvas_.getContext("2d").clearRect(0, 0, | |
937 | g.canvas_.width, | |
938 | g.canvas_.height); | |
939 | } | |
940 | context.dragStartX = null; | |
941 | context.dragStartY = null; | |
942 | } | |
79b3ee42 | 943 | |
c8f393ee RK |
944 | Dygraph.prototype.defaultInteractionModel = { |
945 | // Track the beginning of drag events | |
946 | 'mousedown' : function(event, g, context) { | |
947 | context.initializeMouseDown(event, g, context); | |
bce01b0f | 948 | |
c8f393ee RK |
949 | if (event.altKey || event.shiftKey) { |
950 | Dygraph.startPan(event, g, context); | |
951 | } else { | |
952 | Dygraph.startZoom(event, g, context); | |
953 | } | |
954 | }, | |
955 | ||
956 | // Draw zoom rectangles when the mouse is down and the user moves around | |
957 | 'mousemove' : function(event, g, context) { | |
958 | if (context.isZooming) { | |
959 | Dygraph.moveZoom(event, g, context); | |
960 | } else if (context.isPanning) { | |
961 | Dygraph.movePan(event, g, context); | |
962 | } | |
963 | }, | |
e3489f4f | 964 | |
c8f393ee RK |
965 | 'mouseup' : function(event, g, context) { |
966 | if (context.isZooming) { | |
967 | Dygraph.endZoom(event, g, context); | |
968 | } else if (context.isPanning) { | |
969 | Dygraph.endPan(event, g, context); | |
970 | } | |
971 | }, | |
d58ae307 | 972 | |
ee672584 | 973 | // Temporarily cancel the dragging event when the mouse leaves the graph |
c8f393ee RK |
974 | 'mouseout' : function(event, g, context) { |
975 | if (context.isZooming) { | |
976 | context.dragEndX = null; | |
977 | context.dragEndY = null; | |
978 | } | |
979 | }, | |
e3489f4f | 980 | |
ee672584 | 981 | // Disable zooming out if panning. |
c8f393ee RK |
982 | 'dblclick' : function(event, g, context) { |
983 | if (event.altKey || event.shiftKey) { | |
984 | return; | |
985 | } | |
986 | g.doUnzoom_(); | |
987 | } | |
ee672584 RK |
988 | }; |
989 | ||
990 | /** | |
991 | * Set up all the mouse handlers needed to capture dragging behavior for zoom | |
992 | * events. | |
993 | * @private | |
994 | */ | |
995 | Dygraph.prototype.createDragInterface_ = function() { | |
996 | var context = { | |
997 | // Tracks whether the mouse is down right now | |
998 | isZooming : false, | |
999 | isPanning : false, // is this drag part of a pan? | |
1000 | is2DPan : false, // if so, is that pan 1- or 2-dimensional? | |
1001 | dragStartX : null, | |
1002 | dragStartY : null, | |
1003 | dragEndX : null, | |
1004 | dragEndY : null, | |
1005 | dragDirection : null, | |
1006 | prevEndX : null, | |
1007 | prevEndY : null, | |
1008 | prevDragDirection : null, | |
1009 | ||
1010 | // TODO(danvk): update this comment | |
1011 | // draggingDate and draggingValue represent the [date,value] point on the | |
1012 | // graph at which the mouse was pressed. As the mouse moves while panning, | |
1013 | // the viewport must pan so that the mouse position points to | |
1014 | // [draggingDate, draggingValue] | |
1015 | draggingDate : null, | |
1016 | ||
1017 | // TODO(danvk): update this comment | |
1018 | // The range in second/value units that the viewport encompasses during a | |
1019 | // panning operation. | |
1020 | dateRange : null, | |
1021 | ||
1022 | // Utility function to convert page-wide coordinates to canvas coords | |
1023 | px : 0, | |
1024 | py : 0, | |
1025 | ||
1026 | initializeMouseDown : function(event, g, context) { | |
1027 | // prevents mouse drags from selecting page text. | |
1028 | if (event.preventDefault) { | |
1029 | event.preventDefault(); // Firefox, Chrome, etc. | |
1030 | } else { | |
1031 | event.returnValue = false; // IE | |
1032 | event.cancelBubble = true; | |
1033 | } | |
1034 | ||
1035 | context.px = Dygraph.findPosX(g.canvas_); | |
1036 | context.py = Dygraph.findPosY(g.canvas_); | |
1037 | context.dragStartX = g.dragGetX_(event, context); | |
1038 | context.dragStartY = g.dragGetY_(event, context); | |
bce01b0f | 1039 | } |
ee672584 RK |
1040 | }; |
1041 | ||
1042 | // Defines default behavior if there are no event handlers. | |
c8f393ee | 1043 | var handlers = this.user_attrs_.interactionModel || this.defaultInteractionModel; |
ee672584 RK |
1044 | |
1045 | // Function that binds g and context to the handler. | |
1046 | var bindHandler = function(handler, g) { | |
1047 | return function(event) { | |
1048 | handler(event, g, context); | |
1049 | }; | |
1050 | }; | |
1051 | ||
1052 | for (var eventName in handlers) { | |
1053 | Dygraph.addEvent(this.mouseEventElement_, eventName, | |
1054 | bindHandler(handlers[eventName], this)); | |
1055 | } | |
1056 | ||
1057 | // Self is the graph. | |
1058 | var self = this; | |
6a1aa64f DV |
1059 | |
1060 | // If the user releases the mouse button during a drag, but not over the | |
1061 | // canvas, then it doesn't count as a zooming action. | |
76171648 | 1062 | Dygraph.addEvent(document, 'mouseup', function(event) { |
ee672584 RK |
1063 | if (context.isZooming || context.isPanning) { |
1064 | context.isZooming = false; | |
1065 | context.dragStartX = null; | |
1066 | context.dragStartY = null; | |
6a1aa64f | 1067 | } |
bce01b0f | 1068 | |
ee672584 RK |
1069 | if (context.isPanning) { |
1070 | context.isPanning = false; | |
1071 | context.draggingDate = null; | |
1072 | context.dateRange = null; | |
d58ae307 | 1073 | for (var i = 0; i < self.axes_.length; i++) { |
d63e6799 DV |
1074 | delete self.axes_[i].draggingValue; |
1075 | delete self.axes_[i].dragValueRange; | |
d58ae307 | 1076 | } |
bce01b0f | 1077 | } |
6a1aa64f | 1078 | }); |
6a1aa64f DV |
1079 | }; |
1080 | ||
1081 | /** | |
1082 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
1083 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
ee672584 | 1084 | * avoid extra redrawing, but it's tricky to avoid contexts with the status |
6a1aa64f | 1085 | * dots. |
8b83c6cc | 1086 | * |
39b0e098 RK |
1087 | * @param {Number} direction the direction of the zoom rectangle. Acceptable |
1088 | * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL. | |
6a1aa64f DV |
1089 | * @param {Number} startX The X position where the drag started, in canvas |
1090 | * coordinates. | |
1091 | * @param {Number} endX The current X position of the drag, in canvas coords. | |
8b83c6cc RK |
1092 | * @param {Number} startY The Y position where the drag started, in canvas |
1093 | * coordinates. | |
1094 | * @param {Number} endY The current Y position of the drag, in canvas coords. | |
39b0e098 | 1095 | * @param {Number} prevDirection the value of direction on the previous call to |
8b83c6cc | 1096 | * this function. Used to avoid excess redrawing |
6a1aa64f DV |
1097 | * @param {Number} prevEndX The value of endX on the previous call to this |
1098 | * function. Used to avoid excess redrawing | |
8b83c6cc RK |
1099 | * @param {Number} prevEndY The value of endY on the previous call to this |
1100 | * function. Used to avoid excess redrawing | |
6a1aa64f DV |
1101 | * @private |
1102 | */ | |
8b83c6cc RK |
1103 | Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY, endY, |
1104 | prevDirection, prevEndX, prevEndY) { | |
6a1aa64f DV |
1105 | var ctx = this.canvas_.getContext("2d"); |
1106 | ||
1107 | // Clean up from the previous rect if necessary | |
39b0e098 | 1108 | if (prevDirection == Dygraph.HORIZONTAL) { |
6a1aa64f DV |
1109 | ctx.clearRect(Math.min(startX, prevEndX), 0, |
1110 | Math.abs(startX - prevEndX), this.height_); | |
39b0e098 | 1111 | } else if (prevDirection == Dygraph.VERTICAL){ |
8b83c6cc RK |
1112 | ctx.clearRect(0, Math.min(startY, prevEndY), |
1113 | this.width_, Math.abs(startY - prevEndY)); | |
6a1aa64f DV |
1114 | } |
1115 | ||
1116 | // Draw a light-grey rectangle to show the new viewing area | |
39b0e098 | 1117 | if (direction == Dygraph.HORIZONTAL) { |
8b83c6cc RK |
1118 | if (endX && startX) { |
1119 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
1120 | ctx.fillRect(Math.min(startX, endX), 0, | |
1121 | Math.abs(endX - startX), this.height_); | |
1122 | } | |
1123 | } | |
39b0e098 | 1124 | if (direction == Dygraph.VERTICAL) { |
8b83c6cc RK |
1125 | if (endY && startY) { |
1126 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
1127 | ctx.fillRect(0, Math.min(startY, endY), | |
1128 | this.width_, Math.abs(endY - startY)); | |
1129 | } | |
6a1aa64f DV |
1130 | } |
1131 | }; | |
1132 | ||
1133 | /** | |
8b83c6cc RK |
1134 | * Zoom to something containing [lowX, highX]. These are pixel coordinates in |
1135 | * the canvas. The exact zoom window may be slightly larger if there are no data | |
1136 | * points near lowX or highX. Don't confuse this function with doZoomXDates, | |
1137 | * which accepts dates that match the raw data. This function redraws the graph. | |
d58ae307 | 1138 | * |
6a1aa64f DV |
1139 | * @param {Number} lowX The leftmost pixel value that should be visible. |
1140 | * @param {Number} highX The rightmost pixel value that should be visible. | |
1141 | * @private | |
1142 | */ | |
8b83c6cc | 1143 | Dygraph.prototype.doZoomX_ = function(lowX, highX) { |
6a1aa64f | 1144 | // Find the earliest and latest dates contained in this canvasx range. |
8b83c6cc | 1145 | // Convert the call to date ranges of the raw data. |
56623f3b DV |
1146 | var r = this.toDataCoords(lowX, null); |
1147 | var minDate = r[0]; | |
1148 | r = this.toDataCoords(highX, null); | |
1149 | var maxDate = r[0]; | |
8b83c6cc RK |
1150 | this.doZoomXDates_(minDate, maxDate); |
1151 | }; | |
6a1aa64f | 1152 | |
8b83c6cc RK |
1153 | /** |
1154 | * Zoom to something containing [minDate, maxDate] values. Don't confuse this | |
1155 | * method with doZoomX which accepts pixel coordinates. This function redraws | |
1156 | * the graph. | |
d58ae307 | 1157 | * |
8b83c6cc RK |
1158 | * @param {Number} minDate The minimum date that should be visible. |
1159 | * @param {Number} maxDate The maximum date that should be visible. | |
1160 | * @private | |
1161 | */ | |
1162 | Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) { | |
6a1aa64f | 1163 | this.dateWindow_ = [minDate, maxDate]; |
26ca7938 | 1164 | this.drawGraph_(); |
285a6bda | 1165 | if (this.attr_("zoomCallback")) { |
dea5c743 | 1166 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); |
8b83c6cc RK |
1167 | } |
1168 | }; | |
1169 | ||
1170 | /** | |
1171 | * Zoom to something containing [lowY, highY]. These are pixel coordinates in | |
d58ae307 DV |
1172 | * the canvas. This function redraws the graph. |
1173 | * | |
8b83c6cc RK |
1174 | * @param {Number} lowY The topmost pixel value that should be visible. |
1175 | * @param {Number} highY The lowest pixel value that should be visible. | |
1176 | * @private | |
1177 | */ | |
1178 | Dygraph.prototype.doZoomY_ = function(lowY, highY) { | |
d58ae307 DV |
1179 | // Find the highest and lowest values in pixel range for each axis. |
1180 | // Note that lowY (in pixels) corresponds to the max Value (in data coords). | |
1181 | // This is because pixels increase as you go down on the screen, whereas data | |
1182 | // coordinates increase as you go up the screen. | |
1183 | var valueRanges = []; | |
1184 | for (var i = 0; i < this.axes_.length; i++) { | |
1185 | var hi = this.toDataCoords(null, lowY, i); | |
1186 | var low = this.toDataCoords(null, highY, i); | |
1187 | this.axes_[i].valueWindow = [low[1], hi[1]]; | |
1188 | valueRanges.push([low[1], hi[1]]); | |
1189 | } | |
8b83c6cc | 1190 | |
66c380c4 | 1191 | this.drawGraph_(); |
8b83c6cc | 1192 | if (this.attr_("zoomCallback")) { |
d58ae307 DV |
1193 | var xRange = this.xAxisRange(); |
1194 | this.attr_("zoomCallback")(xRange[0], xRange[1], this.yAxisRanges()); | |
8b83c6cc RK |
1195 | } |
1196 | }; | |
1197 | ||
1198 | /** | |
1199 | * Reset the zoom to the original view coordinates. This is the same as | |
1200 | * double-clicking on the graph. | |
d58ae307 | 1201 | * |
8b83c6cc RK |
1202 | * @private |
1203 | */ | |
1204 | Dygraph.prototype.doUnzoom_ = function() { | |
d58ae307 | 1205 | var dirty = false; |
8b83c6cc | 1206 | if (this.dateWindow_ != null) { |
d58ae307 | 1207 | dirty = true; |
8b83c6cc RK |
1208 | this.dateWindow_ = null; |
1209 | } | |
d58ae307 DV |
1210 | |
1211 | for (var i = 0; i < this.axes_.length; i++) { | |
1212 | if (this.axes_[i].valueWindow != null) { | |
1213 | dirty = true; | |
1214 | delete this.axes_[i].valueWindow; | |
1215 | } | |
8b83c6cc RK |
1216 | } |
1217 | ||
1218 | if (dirty) { | |
437c0979 RK |
1219 | // Putting the drawing operation before the callback because it resets |
1220 | // yAxisRange. | |
66c380c4 | 1221 | this.drawGraph_(); |
8b83c6cc RK |
1222 | if (this.attr_("zoomCallback")) { |
1223 | var minDate = this.rawData_[0][0]; | |
1224 | var maxDate = this.rawData_[this.rawData_.length - 1][0]; | |
d58ae307 | 1225 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); |
8b83c6cc | 1226 | } |
67e650dc | 1227 | } |
6a1aa64f DV |
1228 | }; |
1229 | ||
1230 | /** | |
1231 | * When the mouse moves in the canvas, display information about a nearby data | |
1232 | * point and draw dots over those points in the data series. This function | |
1233 | * takes care of cleanup of previously-drawn dots. | |
1234 | * @param {Object} event The mousemove event from the browser. | |
1235 | * @private | |
1236 | */ | |
285a6bda | 1237 | Dygraph.prototype.mouseMove_ = function(event) { |
eb7bf005 | 1238 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_); |
6a1aa64f DV |
1239 | var points = this.layout_.points; |
1240 | ||
1241 | var lastx = -1; | |
1242 | var lasty = -1; | |
1243 | ||
1244 | // Loop through all the points and find the date nearest to our current | |
1245 | // location. | |
1246 | var minDist = 1e+100; | |
1247 | var idx = -1; | |
1248 | for (var i = 0; i < points.length; i++) { | |
8a7cc60e RK |
1249 | var point = points[i]; |
1250 | if (point == null) continue; | |
ee672584 | 1251 | var dist = Math.abs(point.canvasx - canvasx); |
f032c51d | 1252 | if (dist > minDist) continue; |
6a1aa64f DV |
1253 | minDist = dist; |
1254 | idx = i; | |
1255 | } | |
1256 | if (idx >= 0) lastx = points[idx].xval; | |
1257 | // Check that you can really highlight the last day's data | |
8a7cc60e RK |
1258 | var last = points[points.length-1]; |
1259 | if (last != null && canvasx > last.canvasx) | |
6a1aa64f DV |
1260 | lastx = points[points.length-1].xval; |
1261 | ||
1262 | // Extract the points we've selected | |
b258a3da | 1263 | this.selPoints_ = []; |
50360fd0 | 1264 | var l = points.length; |
416b05ad NK |
1265 | if (!this.attr_("stackedGraph")) { |
1266 | for (var i = 0; i < l; i++) { | |
1267 | if (points[i].xval == lastx) { | |
1268 | this.selPoints_.push(points[i]); | |
1269 | } | |
1270 | } | |
1271 | } else { | |
354e15ab DE |
1272 | // Need to 'unstack' points starting from the bottom |
1273 | var cumulative_sum = 0; | |
416b05ad NK |
1274 | for (var i = l - 1; i >= 0; i--) { |
1275 | if (points[i].xval == lastx) { | |
354e15ab | 1276 | var p = {}; // Clone the point since we modify it |
d4139cd8 NK |
1277 | for (var k in points[i]) { |
1278 | p[k] = points[i][k]; | |
50360fd0 NK |
1279 | } |
1280 | p.yval -= cumulative_sum; | |
1281 | cumulative_sum += p.yval; | |
d4139cd8 | 1282 | this.selPoints_.push(p); |
12e4c741 | 1283 | } |
6a1aa64f | 1284 | } |
354e15ab | 1285 | this.selPoints_.reverse(); |
6a1aa64f DV |
1286 | } |
1287 | ||
b258a3da | 1288 | if (this.attr_("highlightCallback")) { |
a4c6a67c | 1289 | var px = this.lastx_; |
dd082dda | 1290 | if (px !== null && lastx != px) { |
344ba8c0 | 1291 | // only fire if the selected point has changed. |
2ddb1197 | 1292 | this.attr_("highlightCallback")(event, lastx, this.selPoints_, this.idxToRow_(idx)); |
43af96e7 | 1293 | } |
12e4c741 | 1294 | } |
43af96e7 | 1295 | |
239c712d NAG |
1296 | // Save last x position for callbacks. |
1297 | this.lastx_ = lastx; | |
50360fd0 | 1298 | |
239c712d NAG |
1299 | this.updateSelection_(); |
1300 | }; | |
b258a3da | 1301 | |
239c712d | 1302 | /** |
1903f1e4 | 1303 | * Transforms layout_.points index into data row number. |
2ddb1197 | 1304 | * @param int layout_.points index |
1903f1e4 | 1305 | * @return int row number, or -1 if none could be found. |
2ddb1197 SC |
1306 | * @private |
1307 | */ | |
1308 | Dygraph.prototype.idxToRow_ = function(idx) { | |
1903f1e4 | 1309 | if (idx < 0) return -1; |
2ddb1197 | 1310 | |
1903f1e4 DV |
1311 | for (var i in this.layout_.datasets) { |
1312 | if (idx < this.layout_.datasets[i].length) { | |
1313 | return this.boundaryIds_[0][0]+idx; | |
1314 | } | |
1315 | idx -= this.layout_.datasets[i].length; | |
1316 | } | |
1317 | return -1; | |
1318 | }; | |
2ddb1197 SC |
1319 | |
1320 | /** | |
239c712d NAG |
1321 | * Draw dots over the selectied points in the data series. This function |
1322 | * takes care of cleanup of previously-drawn dots. | |
1323 | * @private | |
1324 | */ | |
1325 | Dygraph.prototype.updateSelection_ = function() { | |
6a1aa64f | 1326 | // Clear the previously drawn vertical, if there is one |
6a1aa64f DV |
1327 | var ctx = this.canvas_.getContext("2d"); |
1328 | if (this.previousVerticalX_ >= 0) { | |
46dde5f9 DV |
1329 | // Determine the maximum highlight circle size. |
1330 | var maxCircleSize = 0; | |
227b93cc DV |
1331 | var labels = this.attr_('labels'); |
1332 | for (var i = 1; i < labels.length; i++) { | |
1333 | var r = this.attr_('highlightCircleSize', labels[i]); | |
46dde5f9 DV |
1334 | if (r > maxCircleSize) maxCircleSize = r; |
1335 | } | |
6a1aa64f | 1336 | var px = this.previousVerticalX_; |
46dde5f9 DV |
1337 | ctx.clearRect(px - maxCircleSize - 1, 0, |
1338 | 2 * maxCircleSize + 2, this.height_); | |
6a1aa64f DV |
1339 | } |
1340 | ||
584ceeaa DV |
1341 | var isOK = function(x) { return x && !isNaN(x); }; |
1342 | ||
d160cc3b | 1343 | if (this.selPoints_.length > 0) { |
b258a3da | 1344 | var canvasx = this.selPoints_[0].canvasx; |
6a1aa64f DV |
1345 | |
1346 | // Set the status message to indicate the selected point(s) | |
239c712d | 1347 | var replace = this.attr_('xValueFormatter')(this.lastx_, this) + ":"; |
50360fd0 | 1348 | var fmtFunc = this.attr_('yValueFormatter'); |
6a1aa64f | 1349 | var clen = this.colors_.length; |
d160cc3b NK |
1350 | |
1351 | if (this.attr_('showLabelsOnHighlight')) { | |
1352 | // Set the status message to indicate the selected point(s) | |
d160cc3b | 1353 | for (var i = 0; i < this.selPoints_.length; i++) { |
129569a5 | 1354 | if (!this.attr_("labelsShowZeroValues") && this.selPoints_[i].yval == 0) continue; |
d160cc3b NK |
1355 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
1356 | if (this.attr_("labelsSeparateLines")) { | |
1357 | replace += "<br/>"; | |
1358 | } | |
1359 | var point = this.selPoints_[i]; | |
8fb6dc24 | 1360 | var c = new RGBColor(this.plotter_.colors[point.name]); |
029da4b6 | 1361 | var yval = fmtFunc(point.yval); |
d160cc3b NK |
1362 | replace += " <b><font color='" + c.toHex() + "'>" |
1363 | + point.name + "</font></b>:" | |
1364 | + yval; | |
6a1aa64f | 1365 | } |
50360fd0 | 1366 | |
d160cc3b | 1367 | this.attr_("labelsDiv").innerHTML = replace; |
6a1aa64f | 1368 | } |
6a1aa64f | 1369 | |
6a1aa64f | 1370 | // Draw colored circles over the center of each selected point |
43af96e7 | 1371 | ctx.save(); |
b258a3da | 1372 | for (var i = 0; i < this.selPoints_.length; i++) { |
f032c51d | 1373 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
227b93cc DV |
1374 | var circleSize = |
1375 | this.attr_('highlightCircleSize', this.selPoints_[i].name); | |
6a1aa64f | 1376 | ctx.beginPath(); |
563c70ca | 1377 | ctx.fillStyle = this.plotter_.colors[this.selPoints_[i].name]; |
f032c51d | 1378 | ctx.arc(canvasx, this.selPoints_[i].canvasy, circleSize, |
7bf6a9fe | 1379 | 0, 2 * Math.PI, false); |
6a1aa64f DV |
1380 | ctx.fill(); |
1381 | } | |
1382 | ctx.restore(); | |
1383 | ||
1384 | this.previousVerticalX_ = canvasx; | |
1385 | } | |
1386 | }; | |
1387 | ||
1388 | /** | |
239c712d NAG |
1389 | * Set manually set selected dots, and display information about them |
1390 | * @param int row number that should by highlighted | |
1391 | * false value clears the selection | |
1392 | * @public | |
1393 | */ | |
1394 | Dygraph.prototype.setSelection = function(row) { | |
1395 | // Extract the points we've selected | |
1396 | this.selPoints_ = []; | |
1397 | var pos = 0; | |
50360fd0 | 1398 | |
239c712d | 1399 | if (row !== false) { |
16269f6e NAG |
1400 | row = row-this.boundaryIds_[0][0]; |
1401 | } | |
50360fd0 | 1402 | |
16269f6e | 1403 | if (row !== false && row >= 0) { |
239c712d | 1404 | for (var i in this.layout_.datasets) { |
16269f6e | 1405 | if (row < this.layout_.datasets[i].length) { |
38f33a44 | 1406 | var point = this.layout_.points[pos+row]; |
1407 | ||
1408 | if (this.attr_("stackedGraph")) { | |
8c03ba63 | 1409 | point = this.layout_.unstackPointAtIndex(pos+row); |
38f33a44 | 1410 | } |
1411 | ||
1412 | this.selPoints_.push(point); | |
16269f6e | 1413 | } |
239c712d NAG |
1414 | pos += this.layout_.datasets[i].length; |
1415 | } | |
16269f6e | 1416 | } |
50360fd0 | 1417 | |
16269f6e | 1418 | if (this.selPoints_.length) { |
239c712d NAG |
1419 | this.lastx_ = this.selPoints_[0].xval; |
1420 | this.updateSelection_(); | |
1421 | } else { | |
1422 | this.lastx_ = -1; | |
1423 | this.clearSelection(); | |
1424 | } | |
1425 | ||
1426 | }; | |
1427 | ||
1428 | /** | |
6a1aa64f DV |
1429 | * The mouse has left the canvas. Clear out whatever artifacts remain |
1430 | * @param {Object} event the mouseout event from the browser. | |
1431 | * @private | |
1432 | */ | |
285a6bda | 1433 | Dygraph.prototype.mouseOut_ = function(event) { |
a4c6a67c AV |
1434 | if (this.attr_("unhighlightCallback")) { |
1435 | this.attr_("unhighlightCallback")(event); | |
1436 | } | |
1437 | ||
43af96e7 | 1438 | if (this.attr_("hideOverlayOnMouseOut")) { |
239c712d | 1439 | this.clearSelection(); |
43af96e7 | 1440 | } |
6a1aa64f DV |
1441 | }; |
1442 | ||
239c712d NAG |
1443 | /** |
1444 | * Remove all selection from the canvas | |
1445 | * @public | |
1446 | */ | |
1447 | Dygraph.prototype.clearSelection = function() { | |
1448 | // Get rid of the overlay data | |
1449 | var ctx = this.canvas_.getContext("2d"); | |
1450 | ctx.clearRect(0, 0, this.width_, this.height_); | |
1451 | this.attr_("labelsDiv").innerHTML = ""; | |
1452 | this.selPoints_ = []; | |
1453 | this.lastx_ = -1; | |
1454 | } | |
1455 | ||
103b7292 NAG |
1456 | /** |
1457 | * Returns the number of the currently selected row | |
1458 | * @return int row number, of -1 if nothing is selected | |
1459 | * @public | |
1460 | */ | |
1461 | Dygraph.prototype.getSelection = function() { | |
1462 | if (!this.selPoints_ || this.selPoints_.length < 1) { | |
1463 | return -1; | |
1464 | } | |
50360fd0 | 1465 | |
103b7292 NAG |
1466 | for (var row=0; row<this.layout_.points.length; row++ ) { |
1467 | if (this.layout_.points[row].x == this.selPoints_[0].x) { | |
16269f6e | 1468 | return row + this.boundaryIds_[0][0]; |
103b7292 NAG |
1469 | } |
1470 | } | |
1471 | return -1; | |
1472 | } | |
1473 | ||
285a6bda | 1474 | Dygraph.zeropad = function(x) { |
32988383 DV |
1475 | if (x < 10) return "0" + x; else return "" + x; |
1476 | } | |
1477 | ||
6a1aa64f | 1478 | /** |
6b8e33dd DV |
1479 | * Return a string version of the hours, minutes and seconds portion of a date. |
1480 | * @param {Number} date The JavaScript date (ms since epoch) | |
1481 | * @return {String} A time of the form "HH:MM:SS" | |
1482 | * @private | |
1483 | */ | |
bf640e56 | 1484 | Dygraph.hmsString_ = function(date) { |
285a6bda | 1485 | var zeropad = Dygraph.zeropad; |
6b8e33dd DV |
1486 | var d = new Date(date); |
1487 | if (d.getSeconds()) { | |
1488 | return zeropad(d.getHours()) + ":" + | |
1489 | zeropad(d.getMinutes()) + ":" + | |
1490 | zeropad(d.getSeconds()); | |
6b8e33dd | 1491 | } else { |
054531ca | 1492 | return zeropad(d.getHours()) + ":" + zeropad(d.getMinutes()); |
6b8e33dd DV |
1493 | } |
1494 | } | |
1495 | ||
1496 | /** | |
bf640e56 AV |
1497 | * Convert a JS date to a string appropriate to display on an axis that |
1498 | * is displaying values at the stated granularity. | |
1499 | * @param {Date} date The date to format | |
1500 | * @param {Number} granularity One of the Dygraph granularity constants | |
1501 | * @return {String} The formatted date | |
1502 | * @private | |
1503 | */ | |
1504 | Dygraph.dateAxisFormatter = function(date, granularity) { | |
1505 | if (granularity >= Dygraph.MONTHLY) { | |
1506 | return date.strftime('%b %y'); | |
1507 | } else { | |
31eddad3 | 1508 | var frac = date.getHours() * 3600 + date.getMinutes() * 60 + date.getSeconds() + date.getMilliseconds(); |
bf640e56 AV |
1509 | if (frac == 0 || granularity >= Dygraph.DAILY) { |
1510 | return new Date(date.getTime() + 3600*1000).strftime('%d%b'); | |
1511 | } else { | |
1512 | return Dygraph.hmsString_(date.getTime()); | |
1513 | } | |
1514 | } | |
1515 | } | |
1516 | ||
1517 | /** | |
6a1aa64f DV |
1518 | * Convert a JS date (millis since epoch) to YYYY/MM/DD |
1519 | * @param {Number} date The JavaScript date (ms since epoch) | |
1520 | * @return {String} A date of the form "YYYY/MM/DD" | |
1521 | * @private | |
1522 | */ | |
285a6bda DV |
1523 | Dygraph.dateString_ = function(date, self) { |
1524 | var zeropad = Dygraph.zeropad; | |
6a1aa64f DV |
1525 | var d = new Date(date); |
1526 | ||
1527 | // Get the year: | |
1528 | var year = "" + d.getFullYear(); | |
1529 | // Get a 0 padded month string | |
6b8e33dd | 1530 | var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh |
6a1aa64f | 1531 | // Get a 0 padded day string |
6b8e33dd | 1532 | var day = zeropad(d.getDate()); |
6a1aa64f | 1533 | |
6b8e33dd DV |
1534 | var ret = ""; |
1535 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); | |
bf640e56 | 1536 | if (frac) ret = " " + Dygraph.hmsString_(date); |
6b8e33dd DV |
1537 | |
1538 | return year + "/" + month + "/" + day + ret; | |
6a1aa64f DV |
1539 | }; |
1540 | ||
1541 | /** | |
1542 | * Round a number to the specified number of digits past the decimal point. | |
1543 | * @param {Number} num The number to round | |
1544 | * @param {Number} places The number of decimals to which to round | |
1545 | * @return {Number} The rounded number | |
1546 | * @private | |
1547 | */ | |
029da4b6 | 1548 | Dygraph.round_ = function(num, places) { |
6a1aa64f DV |
1549 | var shift = Math.pow(10, places); |
1550 | return Math.round(num * shift)/shift; | |
1551 | }; | |
1552 | ||
1553 | /** | |
1554 | * Fires when there's data available to be graphed. | |
1555 | * @param {String} data Raw CSV data to be plotted | |
1556 | * @private | |
1557 | */ | |
285a6bda | 1558 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f | 1559 | this.rawData_ = this.parseCSV_(data); |
26ca7938 | 1560 | this.predraw_(); |
6a1aa64f DV |
1561 | }; |
1562 | ||
285a6bda | 1563 | Dygraph.prototype.months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", |
8846615a | 1564 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]; |
285a6bda | 1565 | Dygraph.prototype.quarters = ["Jan", "Apr", "Jul", "Oct"]; |
6a1aa64f DV |
1566 | |
1567 | /** | |
1568 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
1569 | * @private | |
1570 | */ | |
285a6bda | 1571 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f DV |
1572 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
1573 | var startDate, endDate; | |
1574 | if (this.dateWindow_) { | |
1575 | startDate = this.dateWindow_[0]; | |
1576 | endDate = this.dateWindow_[1]; | |
1577 | } else { | |
1578 | startDate = this.rawData_[0][0]; | |
1579 | endDate = this.rawData_[this.rawData_.length - 1][0]; | |
1580 | } | |
1581 | ||
285a6bda | 1582 | var xTicks = this.attr_('xTicker')(startDate, endDate, this); |
6a1aa64f | 1583 | this.layout_.updateOptions({xTicks: xTicks}); |
32988383 DV |
1584 | }; |
1585 | ||
1586 | // Time granularity enumeration | |
285a6bda | 1587 | Dygraph.SECONDLY = 0; |
20a41c17 DV |
1588 | Dygraph.TWO_SECONDLY = 1; |
1589 | Dygraph.FIVE_SECONDLY = 2; | |
1590 | Dygraph.TEN_SECONDLY = 3; | |
1591 | Dygraph.THIRTY_SECONDLY = 4; | |
1592 | Dygraph.MINUTELY = 5; | |
1593 | Dygraph.TWO_MINUTELY = 6; | |
1594 | Dygraph.FIVE_MINUTELY = 7; | |
1595 | Dygraph.TEN_MINUTELY = 8; | |
1596 | Dygraph.THIRTY_MINUTELY = 9; | |
1597 | Dygraph.HOURLY = 10; | |
1598 | Dygraph.TWO_HOURLY = 11; | |
1599 | Dygraph.SIX_HOURLY = 12; | |
1600 | Dygraph.DAILY = 13; | |
1601 | Dygraph.WEEKLY = 14; | |
1602 | Dygraph.MONTHLY = 15; | |
1603 | Dygraph.QUARTERLY = 16; | |
1604 | Dygraph.BIANNUAL = 17; | |
1605 | Dygraph.ANNUAL = 18; | |
1606 | Dygraph.DECADAL = 19; | |
1607 | Dygraph.NUM_GRANULARITIES = 20; | |
285a6bda DV |
1608 | |
1609 | Dygraph.SHORT_SPACINGS = []; | |
1610 | Dygraph.SHORT_SPACINGS[Dygraph.SECONDLY] = 1000 * 1; | |
20a41c17 DV |
1611 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_SECONDLY] = 1000 * 2; |
1612 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_SECONDLY] = 1000 * 5; | |
285a6bda DV |
1613 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_SECONDLY] = 1000 * 10; |
1614 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_SECONDLY] = 1000 * 30; | |
1615 | Dygraph.SHORT_SPACINGS[Dygraph.MINUTELY] = 1000 * 60; | |
20a41c17 DV |
1616 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_MINUTELY] = 1000 * 60 * 2; |
1617 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_MINUTELY] = 1000 * 60 * 5; | |
285a6bda DV |
1618 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_MINUTELY] = 1000 * 60 * 10; |
1619 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_MINUTELY] = 1000 * 60 * 30; | |
1620 | Dygraph.SHORT_SPACINGS[Dygraph.HOURLY] = 1000 * 3600; | |
20a41c17 | 1621 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_HOURLY] = 1000 * 3600 * 2; |
805d5519 | 1622 | Dygraph.SHORT_SPACINGS[Dygraph.SIX_HOURLY] = 1000 * 3600 * 6; |
285a6bda DV |
1623 | Dygraph.SHORT_SPACINGS[Dygraph.DAILY] = 1000 * 86400; |
1624 | Dygraph.SHORT_SPACINGS[Dygraph.WEEKLY] = 1000 * 604800; | |
32988383 DV |
1625 | |
1626 | // NumXTicks() | |
1627 | // | |
1628 | // If we used this time granularity, how many ticks would there be? | |
1629 | // This is only an approximation, but it's generally good enough. | |
1630 | // | |
285a6bda DV |
1631 | Dygraph.prototype.NumXTicks = function(start_time, end_time, granularity) { |
1632 | if (granularity < Dygraph.MONTHLY) { | |
32988383 | 1633 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1634 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
32988383 DV |
1635 | return Math.floor(0.5 + 1.0 * (end_time - start_time) / spacing); |
1636 | } else { | |
1637 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1638 | var num_months = 12; | |
285a6bda DV |
1639 | if (granularity == Dygraph.QUARTERLY) num_months = 3; |
1640 | if (granularity == Dygraph.BIANNUAL) num_months = 2; | |
1641 | if (granularity == Dygraph.ANNUAL) num_months = 1; | |
1642 | if (granularity == Dygraph.DECADAL) { num_months = 1; year_mod = 10; } | |
32988383 DV |
1643 | |
1644 | var msInYear = 365.2524 * 24 * 3600 * 1000; | |
1645 | var num_years = 1.0 * (end_time - start_time) / msInYear; | |
1646 | return Math.floor(0.5 + 1.0 * num_years * num_months / year_mod); | |
1647 | } | |
1648 | }; | |
1649 | ||
1650 | // GetXAxis() | |
1651 | // | |
1652 | // Construct an x-axis of nicely-formatted times on meaningful boundaries | |
1653 | // (e.g. 'Jan 09' rather than 'Jan 22, 2009'). | |
1654 | // | |
1655 | // Returns an array containing {v: millis, label: label} dictionaries. | |
1656 | // | |
285a6bda | 1657 | Dygraph.prototype.GetXAxis = function(start_time, end_time, granularity) { |
bf640e56 | 1658 | var formatter = this.attr_("xAxisLabelFormatter"); |
32988383 | 1659 | var ticks = []; |
285a6bda | 1660 | if (granularity < Dygraph.MONTHLY) { |
32988383 | 1661 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1662 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
3d29302c | 1663 | var format = '%d%b'; // e.g. "1Jan" |
076c9622 DV |
1664 | |
1665 | // Find a time less than start_time which occurs on a "nice" time boundary | |
1666 | // for this granularity. | |
1667 | var g = spacing / 1000; | |
076c9622 DV |
1668 | var d = new Date(start_time); |
1669 | if (g <= 60) { // seconds | |
1670 | var x = d.getSeconds(); d.setSeconds(x - x % g); | |
1671 | } else { | |
1672 | d.setSeconds(0); | |
1673 | g /= 60; | |
1674 | if (g <= 60) { // minutes | |
1675 | var x = d.getMinutes(); d.setMinutes(x - x % g); | |
1676 | } else { | |
1677 | d.setMinutes(0); | |
1678 | g /= 60; | |
1679 | ||
1680 | if (g <= 24) { // days | |
1681 | var x = d.getHours(); d.setHours(x - x % g); | |
1682 | } else { | |
1683 | d.setHours(0); | |
1684 | g /= 24; | |
1685 | ||
1686 | if (g == 7) { // one week | |
20a41c17 | 1687 | d.setDate(d.getDate() - d.getDay()); |
076c9622 DV |
1688 | } |
1689 | } | |
1690 | } | |
328bb812 | 1691 | } |
076c9622 DV |
1692 | start_time = d.getTime(); |
1693 | ||
32988383 | 1694 | for (var t = start_time; t <= end_time; t += spacing) { |
bf640e56 | 1695 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1696 | } |
1697 | } else { | |
1698 | // Display a tick mark on the first of a set of months of each year. | |
1699 | // Years get a tick mark iff y % year_mod == 0. This is useful for | |
1700 | // displaying a tick mark once every 10 years, say, on long time scales. | |
1701 | var months; | |
1702 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1703 | ||
285a6bda | 1704 | if (granularity == Dygraph.MONTHLY) { |
32988383 | 1705 | months = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ]; |
285a6bda | 1706 | } else if (granularity == Dygraph.QUARTERLY) { |
32988383 | 1707 | months = [ 0, 3, 6, 9 ]; |
285a6bda | 1708 | } else if (granularity == Dygraph.BIANNUAL) { |
32988383 | 1709 | months = [ 0, 6 ]; |
285a6bda | 1710 | } else if (granularity == Dygraph.ANNUAL) { |
32988383 | 1711 | months = [ 0 ]; |
285a6bda | 1712 | } else if (granularity == Dygraph.DECADAL) { |
32988383 DV |
1713 | months = [ 0 ]; |
1714 | year_mod = 10; | |
1715 | } | |
1716 | ||
1717 | var start_year = new Date(start_time).getFullYear(); | |
1718 | var end_year = new Date(end_time).getFullYear(); | |
285a6bda | 1719 | var zeropad = Dygraph.zeropad; |
32988383 DV |
1720 | for (var i = start_year; i <= end_year; i++) { |
1721 | if (i % year_mod != 0) continue; | |
1722 | for (var j = 0; j < months.length; j++) { | |
1723 | var date_str = i + "/" + zeropad(1 + months[j]) + "/01"; | |
1724 | var t = Date.parse(date_str); | |
1725 | if (t < start_time || t > end_time) continue; | |
bf640e56 | 1726 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1727 | } |
1728 | } | |
1729 | } | |
1730 | ||
1731 | return ticks; | |
1732 | }; | |
1733 | ||
6a1aa64f DV |
1734 | |
1735 | /** | |
1736 | * Add ticks to the x-axis based on a date range. | |
1737 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1738 | * @param {Number} endDate End of the date window (millis since epoch) | |
1739 | * @return {Array.<Object>} Array of {label, value} tuples. | |
1740 | * @public | |
1741 | */ | |
285a6bda | 1742 | Dygraph.dateTicker = function(startDate, endDate, self) { |
32988383 | 1743 | var chosen = -1; |
285a6bda DV |
1744 | for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) { |
1745 | var num_ticks = self.NumXTicks(startDate, endDate, i); | |
1746 | if (self.width_ / num_ticks >= self.attr_('pixelsPerXLabel')) { | |
32988383 DV |
1747 | chosen = i; |
1748 | break; | |
2769de62 | 1749 | } |
6a1aa64f DV |
1750 | } |
1751 | ||
32988383 | 1752 | if (chosen >= 0) { |
285a6bda | 1753 | return self.GetXAxis(startDate, endDate, chosen); |
6a1aa64f | 1754 | } else { |
32988383 | 1755 | // TODO(danvk): signal error. |
6a1aa64f | 1756 | } |
6a1aa64f DV |
1757 | }; |
1758 | ||
1759 | /** | |
1760 | * Add ticks when the x axis has numbers on it (instead of dates) | |
1761 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1762 | * @param {Number} endDate End of the date window (millis since epoch) | |
84fc6aa7 | 1763 | * @param self |
f30cf740 | 1764 | * @param {function} attribute accessor function. |
6a1aa64f DV |
1765 | * @return {Array.<Object>} Array of {label, value} tuples. |
1766 | * @public | |
1767 | */ | |
0d64e596 | 1768 | Dygraph.numericTicks = function(minV, maxV, self, axis_props, vals) { |
70c80071 DV |
1769 | var attr = function(k) { |
1770 | if (axis_props && axis_props.hasOwnProperty(k)) return axis_props[k]; | |
1771 | return self.attr_(k); | |
1772 | }; | |
f09fc545 | 1773 | |
0d64e596 DV |
1774 | var ticks = []; |
1775 | if (vals) { | |
1776 | for (var i = 0; i < vals.length; i++) { | |
1777 | ticks.push({v: vals[i]}); | |
1778 | } | |
f09e46d4 | 1779 | } else { |
0d64e596 DV |
1780 | // Basic idea: |
1781 | // Try labels every 1, 2, 5, 10, 20, 50, 100, etc. | |
1782 | // Calculate the resulting tick spacing (i.e. this.height_ / nTicks). | |
1783 | // The first spacing greater than pixelsPerYLabel is what we use. | |
1784 | // TODO(danvk): version that works on a log scale. | |
f09fc545 | 1785 | if (attr("labelsKMG2")) { |
0d64e596 | 1786 | var mults = [1, 2, 4, 8]; |
f09e46d4 | 1787 | } else { |
0d64e596 | 1788 | var mults = [1, 2, 5]; |
f09e46d4 | 1789 | } |
0d64e596 DV |
1790 | var scale, low_val, high_val, nTicks; |
1791 | // TODO(danvk): make it possible to set this for x- and y-axes independently. | |
1792 | var pixelsPerTick = attr('pixelsPerYLabel'); | |
1793 | for (var i = -10; i < 50; i++) { | |
1794 | if (attr("labelsKMG2")) { | |
1795 | var base_scale = Math.pow(16, i); | |
1796 | } else { | |
1797 | var base_scale = Math.pow(10, i); | |
1798 | } | |
1799 | for (var j = 0; j < mults.length; j++) { | |
1800 | scale = base_scale * mults[j]; | |
1801 | low_val = Math.floor(minV / scale) * scale; | |
1802 | high_val = Math.ceil(maxV / scale) * scale; | |
1803 | nTicks = Math.abs(high_val - low_val) / scale; | |
1804 | var spacing = self.height_ / nTicks; | |
1805 | // wish I could break out of both loops at once... | |
1806 | if (spacing > pixelsPerTick) break; | |
1807 | } | |
285a6bda | 1808 | if (spacing > pixelsPerTick) break; |
c6336f04 | 1809 | } |
0d64e596 DV |
1810 | |
1811 | // Construct the set of ticks. | |
1812 | // Allow reverse y-axis if it's explicitly requested. | |
1813 | if (low_val > high_val) scale *= -1; | |
1814 | for (var i = 0; i < nTicks; i++) { | |
1815 | var tickV = low_val + i * scale; | |
1816 | ticks.push( {v: tickV} ); | |
1817 | } | |
6a1aa64f DV |
1818 | } |
1819 | ||
0d64e596 | 1820 | // Add formatted labels to the ticks. |
ed11be50 DV |
1821 | var k; |
1822 | var k_labels = []; | |
f09fc545 | 1823 | if (attr("labelsKMB")) { |
ed11be50 DV |
1824 | k = 1000; |
1825 | k_labels = [ "K", "M", "B", "T" ]; | |
1826 | } | |
f09fc545 | 1827 | if (attr("labelsKMG2")) { |
ed11be50 DV |
1828 | if (k) self.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); |
1829 | k = 1024; | |
1830 | k_labels = [ "k", "M", "G", "T" ]; | |
1831 | } | |
c94eee24 | 1832 | var formatter = attr('yAxisLabelFormatter') ? attr('yAxisLabelFormatter') : attr('yValueFormatter'); |
ed11be50 | 1833 | |
0d64e596 DV |
1834 | for (var i = 0; i < ticks.length; i++) { |
1835 | var tickV = ticks[i].v; | |
0af6e346 | 1836 | var absTickV = Math.abs(tickV); |
84fc6aa7 NN |
1837 | var label; |
1838 | if (formatter != undefined) { | |
1839 | label = formatter(tickV); | |
1840 | } else { | |
1841 | label = Dygraph.round_(tickV, 2); | |
1842 | } | |
ed11be50 DV |
1843 | if (k_labels.length) { |
1844 | // Round up to an appropriate unit. | |
1845 | var n = k*k*k*k; | |
1846 | for (var j = 3; j >= 0; j--, n /= k) { | |
1847 | if (absTickV >= n) { | |
029da4b6 | 1848 | label = Dygraph.round_(tickV / n, 1) + k_labels[j]; |
ed11be50 DV |
1849 | break; |
1850 | } | |
afefbcdb | 1851 | } |
6a1aa64f | 1852 | } |
0d64e596 | 1853 | ticks[i].label = label; |
6a1aa64f DV |
1854 | } |
1855 | return ticks; | |
1856 | }; | |
1857 | ||
5011e7a1 DV |
1858 | // Computes the range of the data series (including confidence intervals). |
1859 | // series is either [ [x1, y1], [x2, y2], ... ] or | |
1860 | // [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... | |
1861 | // Returns [low, high] | |
1862 | Dygraph.prototype.extremeValues_ = function(series) { | |
1863 | var minY = null, maxY = null; | |
1864 | ||
9922b78b | 1865 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
5011e7a1 DV |
1866 | if (bars) { |
1867 | // With custom bars, maxY is the max of the high values. | |
1868 | for (var j = 0; j < series.length; j++) { | |
1869 | var y = series[j][1][0]; | |
1870 | if (!y) continue; | |
1871 | var low = y - series[j][1][1]; | |
1872 | var high = y + series[j][1][2]; | |
1873 | if (low > y) low = y; // this can happen with custom bars, | |
1874 | if (high < y) high = y; // e.g. in tests/custom-bars.html | |
1875 | if (maxY == null || high > maxY) { | |
1876 | maxY = high; | |
1877 | } | |
1878 | if (minY == null || low < minY) { | |
1879 | minY = low; | |
1880 | } | |
1881 | } | |
1882 | } else { | |
1883 | for (var j = 0; j < series.length; j++) { | |
1884 | var y = series[j][1]; | |
d12999d3 | 1885 | if (y === null || isNaN(y)) continue; |
5011e7a1 DV |
1886 | if (maxY == null || y > maxY) { |
1887 | maxY = y; | |
1888 | } | |
1889 | if (minY == null || y < minY) { | |
1890 | minY = y; | |
1891 | } | |
1892 | } | |
1893 | } | |
1894 | ||
1895 | return [minY, maxY]; | |
1896 | }; | |
1897 | ||
6a1aa64f | 1898 | /** |
26ca7938 DV |
1899 | * This function is called once when the chart's data is changed or the options |
1900 | * dictionary is updated. It is _not_ called when the user pans or zooms. The | |
1901 | * idea is that values derived from the chart's data can be computed here, | |
1902 | * rather than every time the chart is drawn. This includes things like the | |
1903 | * number of axes, rolling averages, etc. | |
1904 | */ | |
1905 | Dygraph.prototype.predraw_ = function() { | |
1906 | // TODO(danvk): move more computations out of drawGraph_ and into here. | |
1907 | this.computeYAxes_(); | |
1908 | ||
1909 | // Create a new plotter. | |
70c80071 | 1910 | if (this.plotter_) this.plotter_.clear(); |
26ca7938 DV |
1911 | this.plotter_ = new DygraphCanvasRenderer(this, |
1912 | this.hidden_, this.layout_, | |
1913 | this.renderOptions_); | |
1914 | ||
0abfbd7e DV |
1915 | // The roller sits in the bottom left corner of the chart. We don't know where |
1916 | // this will be until the options are available, so it's positioned here. | |
8c69de65 | 1917 | this.createRollInterface_(); |
26ca7938 | 1918 | |
0abfbd7e DV |
1919 | // Same thing applies for the labelsDiv. It's right edge should be flush with |
1920 | // the right edge of the charting area (which may not be the same as the right | |
1921 | // edge of the div, if we have two y-axes. | |
1922 | this.positionLabelsDiv_(); | |
1923 | ||
26ca7938 DV |
1924 | // If the data or options have changed, then we'd better redraw. |
1925 | this.drawGraph_(); | |
1926 | }; | |
1927 | ||
1928 | /** | |
2f5e7e1a | 1929 | ======= |
26ca7938 DV |
1930 | * Update the graph with new data. This method is called when the viewing area |
1931 | * has changed. If the underlying data or options have changed, predraw_ will | |
1932 | * be called before drawGraph_ is called. | |
6a1aa64f DV |
1933 | * @private |
1934 | */ | |
26ca7938 DV |
1935 | Dygraph.prototype.drawGraph_ = function() { |
1936 | var data = this.rawData_; | |
1937 | ||
fe0b7c03 DV |
1938 | // This is used to set the second parameter to drawCallback, below. |
1939 | var is_initial_draw = this.is_initial_draw_; | |
1940 | this.is_initial_draw_ = false; | |
1941 | ||
3bd9c228 | 1942 | var minY = null, maxY = null; |
6a1aa64f | 1943 | this.layout_.removeAllDatasets(); |
285a6bda | 1944 | this.setColors_(); |
9317362d | 1945 | this.attrs_['pointSize'] = 0.5 * this.attr_('highlightCircleSize'); |
285a6bda | 1946 | |
354e15ab DE |
1947 | // Loop over the fields (series). Go from the last to the first, |
1948 | // because if they're stacked that's how we accumulate the values. | |
43af96e7 | 1949 | |
354e15ab DE |
1950 | var cumulative_y = []; // For stacked series. |
1951 | var datasets = []; | |
1952 | ||
f09fc545 DV |
1953 | var extremes = {}; // series name -> [low, high] |
1954 | ||
354e15ab DE |
1955 | // Loop over all fields and create datasets |
1956 | for (var i = data[0].length - 1; i >= 1; i--) { | |
1cf11047 DV |
1957 | if (!this.visibility()[i - 1]) continue; |
1958 | ||
f09fc545 | 1959 | var seriesName = this.attr_("labels")[i]; |
450fe64b DV |
1960 | var connectSeparatedPoints = this.attr_('connectSeparatedPoints', i); |
1961 | ||
6a1aa64f DV |
1962 | var series = []; |
1963 | for (var j = 0; j < data.length; j++) { | |
4a634fc7 | 1964 | if (data[j][i] != null || !connectSeparatedPoints) { |
f032c51d | 1965 | var date = data[j][0]; |
563c70ca | 1966 | series.push([date, data[j][i]]); |
f032c51d | 1967 | } |
6a1aa64f | 1968 | } |
2f5e7e1a DV |
1969 | |
1970 | // TODO(danvk): move this into predraw_. It's insane to do it here. | |
6a1aa64f DV |
1971 | series = this.rollingAverage(series, this.rollPeriod_); |
1972 | ||
1973 | // Prune down to the desired range, if necessary (for zooming) | |
1a26f3fb DV |
1974 | // Because there can be lines going to points outside of the visible area, |
1975 | // we actually prune to visible points, plus one on either side. | |
9922b78b | 1976 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
6a1aa64f DV |
1977 | if (this.dateWindow_) { |
1978 | var low = this.dateWindow_[0]; | |
1979 | var high= this.dateWindow_[1]; | |
1980 | var pruned = []; | |
1a26f3fb DV |
1981 | // TODO(danvk): do binary search instead of linear search. |
1982 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. | |
1983 | var firstIdx = null, lastIdx = null; | |
6a1aa64f | 1984 | for (var k = 0; k < series.length; k++) { |
1a26f3fb DV |
1985 | if (series[k][0] >= low && firstIdx === null) { |
1986 | firstIdx = k; | |
1987 | } | |
1988 | if (series[k][0] <= high) { | |
1989 | lastIdx = k; | |
6a1aa64f DV |
1990 | } |
1991 | } | |
1a26f3fb DV |
1992 | if (firstIdx === null) firstIdx = 0; |
1993 | if (firstIdx > 0) firstIdx--; | |
1994 | if (lastIdx === null) lastIdx = series.length - 1; | |
1995 | if (lastIdx < series.length - 1) lastIdx++; | |
16269f6e | 1996 | this.boundaryIds_[i-1] = [firstIdx, lastIdx]; |
1a26f3fb DV |
1997 | for (var k = firstIdx; k <= lastIdx; k++) { |
1998 | pruned.push(series[k]); | |
6a1aa64f DV |
1999 | } |
2000 | series = pruned; | |
16269f6e NAG |
2001 | } else { |
2002 | this.boundaryIds_[i-1] = [0, series.length-1]; | |
6a1aa64f DV |
2003 | } |
2004 | ||
f09fc545 | 2005 | var seriesExtremes = this.extremeValues_(series); |
5011e7a1 | 2006 | |
6a1aa64f | 2007 | if (bars) { |
354e15ab DE |
2008 | for (var j=0; j<series.length; j++) { |
2009 | val = [series[j][0], series[j][1][0], series[j][1][1], series[j][1][2]]; | |
2010 | series[j] = val; | |
2011 | } | |
43af96e7 | 2012 | } else if (this.attr_("stackedGraph")) { |
43af96e7 NK |
2013 | var l = series.length; |
2014 | var actual_y; | |
2015 | for (var j = 0; j < l; j++) { | |
354e15ab DE |
2016 | // If one data set has a NaN, let all subsequent stacked |
2017 | // sets inherit the NaN -- only start at 0 for the first set. | |
2018 | var x = series[j][0]; | |
41b0f691 | 2019 | if (cumulative_y[x] === undefined) { |
354e15ab | 2020 | cumulative_y[x] = 0; |
41b0f691 | 2021 | } |
43af96e7 NK |
2022 | |
2023 | actual_y = series[j][1]; | |
354e15ab | 2024 | cumulative_y[x] += actual_y; |
43af96e7 | 2025 | |
354e15ab | 2026 | series[j] = [x, cumulative_y[x]] |
43af96e7 | 2027 | |
41b0f691 DV |
2028 | if (cumulative_y[x] > seriesExtremes[1]) { |
2029 | seriesExtremes[1] = cumulative_y[x]; | |
2030 | } | |
2031 | if (cumulative_y[x] < seriesExtremes[0]) { | |
2032 | seriesExtremes[0] = cumulative_y[x]; | |
2033 | } | |
43af96e7 | 2034 | } |
6a1aa64f | 2035 | } |
41b0f691 | 2036 | extremes[seriesName] = seriesExtremes; |
354e15ab DE |
2037 | |
2038 | datasets[i] = series; | |
6a1aa64f DV |
2039 | } |
2040 | ||
354e15ab | 2041 | for (var i = 1; i < datasets.length; i++) { |
4523c1f6 | 2042 | if (!this.visibility()[i - 1]) continue; |
354e15ab | 2043 | this.layout_.addDataset(this.attr_("labels")[i], datasets[i]); |
43af96e7 NK |
2044 | } |
2045 | ||
26ca7938 DV |
2046 | // TODO(danvk): this method doesn't need to return anything. |
2047 | var out = this.computeYAxisRanges_(extremes); | |
f09fc545 DV |
2048 | var axes = out[0]; |
2049 | var seriesToAxisMap = out[1]; | |
9012dd21 | 2050 | this.layout_.updateOptions( { yAxes: axes, |
ea4942ed | 2051 | seriesToAxisMap: seriesToAxisMap |
9012dd21 | 2052 | } ); |
f09fc545 | 2053 | |
6a1aa64f DV |
2054 | this.addXTicks_(); |
2055 | ||
2056 | // Tell PlotKit to use this new data and render itself | |
d033ae1c | 2057 | this.layout_.updateOptions({dateWindow: this.dateWindow_}); |
6a1aa64f DV |
2058 | this.layout_.evaluateWithError(); |
2059 | this.plotter_.clear(); | |
2060 | this.plotter_.render(); | |
f6401bf6 | 2061 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
2f5e7e1a | 2062 | this.canvas_.height); |
599fb4ad DV |
2063 | |
2064 | if (this.attr_("drawCallback") !== null) { | |
fe0b7c03 | 2065 | this.attr_("drawCallback")(this, is_initial_draw); |
599fb4ad | 2066 | } |
6a1aa64f DV |
2067 | }; |
2068 | ||
2069 | /** | |
26ca7938 DV |
2070 | * Determine properties of the y-axes which are independent of the data |
2071 | * currently being displayed. This includes things like the number of axes and | |
2072 | * the style of the axes. It does not include the range of each axis and its | |
2073 | * tick marks. | |
2074 | * This fills in this.axes_ and this.seriesToAxisMap_. | |
2075 | * axes_ = [ { options } ] | |
2076 | * seriesToAxisMap_ = { seriesName: 0, seriesName2: 1, ... } | |
2077 | * indices are into the axes_ array. | |
f09fc545 | 2078 | */ |
26ca7938 DV |
2079 | Dygraph.prototype.computeYAxes_ = function() { |
2080 | this.axes_ = [{}]; // always have at least one y-axis. | |
2081 | this.seriesToAxisMap_ = {}; | |
2082 | ||
2083 | // Get a list of series names. | |
2084 | var labels = this.attr_("labels"); | |
1c77a3a1 | 2085 | var series = {}; |
26ca7938 | 2086 | for (var i = 1; i < labels.length; i++) series[labels[i]] = (i - 1); |
f09fc545 DV |
2087 | |
2088 | // all options which could be applied per-axis: | |
2089 | var axisOptions = [ | |
2090 | 'includeZero', | |
2091 | 'valueRange', | |
2092 | 'labelsKMB', | |
2093 | 'labelsKMG2', | |
2094 | 'pixelsPerYLabel', | |
2095 | 'yAxisLabelWidth', | |
2096 | 'axisLabelFontSize', | |
2097 | 'axisTickSize' | |
2098 | ]; | |
2099 | ||
2100 | // Copy global axis options over to the first axis. | |
2101 | for (var i = 0; i < axisOptions.length; i++) { | |
2102 | var k = axisOptions[i]; | |
2103 | var v = this.attr_(k); | |
26ca7938 | 2104 | if (v) this.axes_[0][k] = v; |
f09fc545 DV |
2105 | } |
2106 | ||
2107 | // Go through once and add all the axes. | |
26ca7938 DV |
2108 | for (var seriesName in series) { |
2109 | if (!series.hasOwnProperty(seriesName)) continue; | |
f09fc545 DV |
2110 | var axis = this.attr_("axis", seriesName); |
2111 | if (axis == null) { | |
26ca7938 | 2112 | this.seriesToAxisMap_[seriesName] = 0; |
f09fc545 DV |
2113 | continue; |
2114 | } | |
2115 | if (typeof(axis) == 'object') { | |
2116 | // Add a new axis, making a copy of its per-axis options. | |
2117 | var opts = {}; | |
26ca7938 | 2118 | Dygraph.update(opts, this.axes_[0]); |
f09fc545 DV |
2119 | Dygraph.update(opts, { valueRange: null }); // shouldn't inherit this. |
2120 | Dygraph.update(opts, axis); | |
26ca7938 DV |
2121 | this.axes_.push(opts); |
2122 | this.seriesToAxisMap_[seriesName] = this.axes_.length - 1; | |
f09fc545 DV |
2123 | } |
2124 | } | |
2125 | ||
2126 | // Go through one more time and assign series to an axis defined by another | |
2127 | // series, e.g. { 'Y1: { axis: {} }, 'Y2': { axis: 'Y1' } } | |
26ca7938 DV |
2128 | for (var seriesName in series) { |
2129 | if (!series.hasOwnProperty(seriesName)) continue; | |
f09fc545 DV |
2130 | var axis = this.attr_("axis", seriesName); |
2131 | if (typeof(axis) == 'string') { | |
26ca7938 | 2132 | if (!this.seriesToAxisMap_.hasOwnProperty(axis)) { |
f09fc545 DV |
2133 | this.error("Series " + seriesName + " wants to share a y-axis with " + |
2134 | "series " + axis + ", which does not define its own axis."); | |
2135 | return null; | |
2136 | } | |
26ca7938 DV |
2137 | var idx = this.seriesToAxisMap_[axis]; |
2138 | this.seriesToAxisMap_[seriesName] = idx; | |
f09fc545 DV |
2139 | } |
2140 | } | |
1c77a3a1 DV |
2141 | |
2142 | // Now we remove series from seriesToAxisMap_ which are not visible. We do | |
2143 | // this last so that hiding the first series doesn't destroy the axis | |
2144 | // properties of the primary axis. | |
2145 | var seriesToAxisFiltered = {}; | |
2146 | var vis = this.visibility(); | |
2147 | for (var i = 1; i < labels.length; i++) { | |
2148 | var s = labels[i]; | |
2149 | if (vis[i - 1]) seriesToAxisFiltered[s] = this.seriesToAxisMap_[s]; | |
2150 | } | |
2151 | this.seriesToAxisMap_ = seriesToAxisFiltered; | |
26ca7938 DV |
2152 | }; |
2153 | ||
2154 | /** | |
2155 | * Returns the number of y-axes on the chart. | |
2156 | * @return {Number} the number of axes. | |
2157 | */ | |
2158 | Dygraph.prototype.numAxes = function() { | |
2159 | var last_axis = 0; | |
2160 | for (var series in this.seriesToAxisMap_) { | |
2161 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; | |
2162 | var idx = this.seriesToAxisMap_[series]; | |
2163 | if (idx > last_axis) last_axis = idx; | |
2164 | } | |
2165 | return 1 + last_axis; | |
2166 | }; | |
2167 | ||
2168 | /** | |
2169 | * Determine the value range and tick marks for each axis. | |
2170 | * @param {Object} extremes A mapping from seriesName -> [low, high] | |
2171 | * This fills in the valueRange and ticks fields in each entry of this.axes_. | |
2172 | */ | |
2173 | Dygraph.prototype.computeYAxisRanges_ = function(extremes) { | |
2174 | // Build a map from axis number -> [list of series names] | |
2175 | var seriesForAxis = []; | |
2176 | for (var series in this.seriesToAxisMap_) { | |
2177 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; | |
2178 | var idx = this.seriesToAxisMap_[series]; | |
2179 | while (seriesForAxis.length <= idx) seriesForAxis.push([]); | |
2180 | seriesForAxis[idx].push(series); | |
2181 | } | |
f09fc545 DV |
2182 | |
2183 | // Compute extreme values, a span and tick marks for each axis. | |
26ca7938 DV |
2184 | for (var i = 0; i < this.axes_.length; i++) { |
2185 | var axis = this.axes_[i]; | |
d58ae307 DV |
2186 | if (axis.valueWindow) { |
2187 | // This is only set if the user has zoomed on the y-axis. It is never set | |
2188 | // by a user. It takes precedence over axis.valueRange because, if you set | |
2189 | // valueRange, you'd still expect to be able to pan. | |
2190 | axis.computedValueRange = [axis.valueWindow[0], axis.valueWindow[1]]; | |
2191 | } else if (axis.valueRange) { | |
2192 | // This is a user-set value range for this axis. | |
26ca7938 DV |
2193 | axis.computedValueRange = [axis.valueRange[0], axis.valueRange[1]]; |
2194 | } else { | |
1c77a3a1 | 2195 | // Calculate the extremes of extremes. |
f09fc545 DV |
2196 | var series = seriesForAxis[i]; |
2197 | var minY = Infinity; // extremes[series[0]][0]; | |
2198 | var maxY = -Infinity; // extremes[series[0]][1]; | |
2199 | for (var j = 0; j < series.length; j++) { | |
2200 | minY = Math.min(extremes[series[j]][0], minY); | |
e3b6727e | 2201 | maxY = Math.max(extremes[series[j]][1], maxY); |
f09fc545 DV |
2202 | } |
2203 | if (axis.includeZero && minY > 0) minY = 0; | |
2204 | ||
2205 | // Add some padding and round up to an integer to be human-friendly. | |
2206 | var span = maxY - minY; | |
2207 | // special case: if we have no sense of scale, use +/-10% of the sole value. | |
2208 | if (span == 0) { span = maxY; } | |
2209 | var maxAxisY = maxY + 0.1 * span; | |
2210 | var minAxisY = minY - 0.1 * span; | |
2211 | ||
2212 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. | |
2f5e7e1a DV |
2213 | if (!this.attr_("avoidMinZero")) { |
2214 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; | |
2215 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
2216 | } | |
f09fc545 DV |
2217 | |
2218 | if (this.attr_("includeZero")) { | |
2219 | if (maxY < 0) maxAxisY = 0; | |
2220 | if (minY > 0) minAxisY = 0; | |
2221 | } | |
2222 | ||
26ca7938 | 2223 | axis.computedValueRange = [minAxisY, maxAxisY]; |
f09fc545 DV |
2224 | } |
2225 | ||
0d64e596 DV |
2226 | // Add ticks. By default, all axes inherit the tick positions of the |
2227 | // primary axis. However, if an axis is specifically marked as having | |
2228 | // independent ticks, then that is permissible as well. | |
2229 | if (i == 0 || axis.independentTicks) { | |
2230 | axis.ticks = | |
2231 | Dygraph.numericTicks(axis.computedValueRange[0], | |
2232 | axis.computedValueRange[1], | |
2233 | this, | |
2234 | axis); | |
2235 | } else { | |
2236 | var p_axis = this.axes_[0]; | |
2237 | var p_ticks = p_axis.ticks; | |
2238 | var p_scale = p_axis.computedValueRange[1] - p_axis.computedValueRange[0]; | |
2239 | var scale = axis.computedValueRange[1] - axis.computedValueRange[0]; | |
2240 | var tick_values = []; | |
2241 | for (var i = 0; i < p_ticks.length; i++) { | |
2242 | var y_frac = (p_ticks[i].v - p_axis.computedValueRange[0]) / p_scale; | |
2243 | var y_val = axis.computedValueRange[0] + y_frac * scale; | |
2244 | tick_values.push(y_val); | |
2245 | } | |
2246 | ||
2247 | axis.ticks = | |
2248 | Dygraph.numericTicks(axis.computedValueRange[0], | |
2249 | axis.computedValueRange[1], | |
2250 | this, axis, tick_values); | |
2251 | } | |
f09fc545 DV |
2252 | } |
2253 | ||
26ca7938 | 2254 | return [this.axes_, this.seriesToAxisMap_]; |
f09fc545 DV |
2255 | }; |
2256 | ||
2257 | /** | |
6a1aa64f DV |
2258 | * Calculates the rolling average of a data set. |
2259 | * If originalData is [label, val], rolls the average of those. | |
2260 | * If originalData is [label, [, it's interpreted as [value, stddev] | |
2261 | * and the roll is returned in the same form, with appropriately reduced | |
2262 | * stddev for each value. | |
2263 | * Note that this is where fractional input (i.e. '5/10') is converted into | |
2264 | * decimal values. | |
2265 | * @param {Array} originalData The data in the appropriate format (see above) | |
2266 | * @param {Number} rollPeriod The number of days over which to average the data | |
2267 | */ | |
285a6bda | 2268 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
6a1aa64f DV |
2269 | if (originalData.length < 2) |
2270 | return originalData; | |
2271 | var rollPeriod = Math.min(rollPeriod, originalData.length - 1); | |
2272 | var rollingData = []; | |
285a6bda | 2273 | var sigma = this.attr_("sigma"); |
6a1aa64f DV |
2274 | |
2275 | if (this.fractions_) { | |
2276 | var num = 0; | |
2277 | var den = 0; // numerator/denominator | |
2278 | var mult = 100.0; | |
2279 | for (var i = 0; i < originalData.length; i++) { | |
2280 | num += originalData[i][1][0]; | |
2281 | den += originalData[i][1][1]; | |
2282 | if (i - rollPeriod >= 0) { | |
2283 | num -= originalData[i - rollPeriod][1][0]; | |
2284 | den -= originalData[i - rollPeriod][1][1]; | |
2285 | } | |
2286 | ||
2287 | var date = originalData[i][0]; | |
2288 | var value = den ? num / den : 0.0; | |
285a6bda | 2289 | if (this.attr_("errorBars")) { |
6a1aa64f DV |
2290 | if (this.wilsonInterval_) { |
2291 | // For more details on this confidence interval, see: | |
2292 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval | |
2293 | if (den) { | |
2294 | var p = value < 0 ? 0 : value, n = den; | |
2295 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); | |
2296 | var denom = 1 + sigma * sigma / den; | |
2297 | var low = (p + sigma * sigma / (2 * den) - pm) / denom; | |
2298 | var high = (p + sigma * sigma / (2 * den) + pm) / denom; | |
2299 | rollingData[i] = [date, | |
2300 | [p * mult, (p - low) * mult, (high - p) * mult]]; | |
2301 | } else { | |
2302 | rollingData[i] = [date, [0, 0, 0]]; | |
2303 | } | |
2304 | } else { | |
2305 | var stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; | |
2306 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; | |
2307 | } | |
2308 | } else { | |
2309 | rollingData[i] = [date, mult * value]; | |
2310 | } | |
2311 | } | |
9922b78b | 2312 | } else if (this.attr_("customBars")) { |
f6885d6a DV |
2313 | var low = 0; |
2314 | var mid = 0; | |
2315 | var high = 0; | |
2316 | var count = 0; | |
6a1aa64f DV |
2317 | for (var i = 0; i < originalData.length; i++) { |
2318 | var data = originalData[i][1]; | |
2319 | var y = data[1]; | |
2320 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; | |
f6885d6a | 2321 | |
8b91c51f | 2322 | if (y != null && !isNaN(y)) { |
49a7d0d5 DV |
2323 | low += data[0]; |
2324 | mid += y; | |
2325 | high += data[2]; | |
2326 | count += 1; | |
2327 | } | |
f6885d6a DV |
2328 | if (i - rollPeriod >= 0) { |
2329 | var prev = originalData[i - rollPeriod]; | |
8b91c51f | 2330 | if (prev[1][1] != null && !isNaN(prev[1][1])) { |
49a7d0d5 DV |
2331 | low -= prev[1][0]; |
2332 | mid -= prev[1][1]; | |
2333 | high -= prev[1][2]; | |
2334 | count -= 1; | |
2335 | } | |
f6885d6a DV |
2336 | } |
2337 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, | |
2338 | 1.0 * (mid - low) / count, | |
2339 | 1.0 * (high - mid) / count ]]; | |
2769de62 | 2340 | } |
6a1aa64f DV |
2341 | } else { |
2342 | // Calculate the rolling average for the first rollPeriod - 1 points where | |
2343 | // there is not enough data to roll over the full number of days | |
2344 | var num_init_points = Math.min(rollPeriod - 1, originalData.length - 2); | |
285a6bda | 2345 | if (!this.attr_("errorBars")){ |
5011e7a1 DV |
2346 | if (rollPeriod == 1) { |
2347 | return originalData; | |
2348 | } | |
2349 | ||
2847c1cf | 2350 | for (var i = 0; i < originalData.length; i++) { |
6a1aa64f | 2351 | var sum = 0; |
5011e7a1 | 2352 | var num_ok = 0; |
2847c1cf DV |
2353 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
2354 | var y = originalData[j][1]; | |
8b91c51f | 2355 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 2356 | num_ok++; |
2847c1cf | 2357 | sum += originalData[j][1]; |
6a1aa64f | 2358 | } |
5011e7a1 | 2359 | if (num_ok) { |
2847c1cf | 2360 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
5011e7a1 | 2361 | } else { |
2847c1cf | 2362 | rollingData[i] = [originalData[i][0], null]; |
5011e7a1 | 2363 | } |
6a1aa64f | 2364 | } |
2847c1cf DV |
2365 | |
2366 | } else { | |
2367 | for (var i = 0; i < originalData.length; i++) { | |
6a1aa64f DV |
2368 | var sum = 0; |
2369 | var variance = 0; | |
5011e7a1 | 2370 | var num_ok = 0; |
2847c1cf | 2371 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
5011e7a1 | 2372 | var y = originalData[j][1][0]; |
8b91c51f | 2373 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 2374 | num_ok++; |
6a1aa64f DV |
2375 | sum += originalData[j][1][0]; |
2376 | variance += Math.pow(originalData[j][1][1], 2); | |
2377 | } | |
5011e7a1 DV |
2378 | if (num_ok) { |
2379 | var stddev = Math.sqrt(variance) / num_ok; | |
2380 | rollingData[i] = [originalData[i][0], | |
2381 | [sum / num_ok, sigma * stddev, sigma * stddev]]; | |
2382 | } else { | |
2383 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
2384 | } | |
6a1aa64f DV |
2385 | } |
2386 | } | |
2387 | } | |
2388 | ||
2389 | return rollingData; | |
2390 | }; | |
2391 | ||
2392 | /** | |
2393 | * Parses a date, returning the number of milliseconds since epoch. This can be | |
285a6bda DV |
2394 | * passed in as an xValueParser in the Dygraph constructor. |
2395 | * TODO(danvk): enumerate formats that this understands. | |
6a1aa64f DV |
2396 | * @param {String} A date in YYYYMMDD format. |
2397 | * @return {Number} Milliseconds since epoch. | |
2398 | * @public | |
2399 | */ | |
285a6bda | 2400 | Dygraph.dateParser = function(dateStr, self) { |
6a1aa64f | 2401 | var dateStrSlashed; |
285a6bda | 2402 | var d; |
986a5026 | 2403 | if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12' |
6a1aa64f | 2404 | dateStrSlashed = dateStr.replace("-", "/", "g"); |
353a0294 DV |
2405 | while (dateStrSlashed.search("-") != -1) { |
2406 | dateStrSlashed = dateStrSlashed.replace("-", "/"); | |
2407 | } | |
285a6bda | 2408 | d = Date.parse(dateStrSlashed); |
2769de62 | 2409 | } else if (dateStr.length == 8) { // e.g. '20090712' |
285a6bda | 2410 | // TODO(danvk): remove support for this format. It's confusing. |
6a1aa64f DV |
2411 | dateStrSlashed = dateStr.substr(0,4) + "/" + dateStr.substr(4,2) |
2412 | + "/" + dateStr.substr(6,2); | |
285a6bda | 2413 | d = Date.parse(dateStrSlashed); |
2769de62 DV |
2414 | } else { |
2415 | // Any format that Date.parse will accept, e.g. "2009/07/12" or | |
2416 | // "2009/07/12 12:34:56" | |
285a6bda DV |
2417 | d = Date.parse(dateStr); |
2418 | } | |
2419 | ||
2420 | if (!d || isNaN(d)) { | |
2421 | self.error("Couldn't parse " + dateStr + " as a date"); | |
2422 | } | |
2423 | return d; | |
2424 | }; | |
2425 | ||
2426 | /** | |
2427 | * Detects the type of the str (date or numeric) and sets the various | |
2428 | * formatting attributes in this.attrs_ based on this type. | |
2429 | * @param {String} str An x value. | |
2430 | * @private | |
2431 | */ | |
2432 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
2433 | var isDate = false; | |
2434 | if (str.indexOf('-') >= 0 || | |
2435 | str.indexOf('/') >= 0 || | |
2436 | isNaN(parseFloat(str))) { | |
2437 | isDate = true; | |
2438 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
2439 | // TODO(danvk): remove support for this format. | |
2440 | isDate = true; | |
2441 | } | |
2442 | ||
2443 | if (isDate) { | |
2444 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
2445 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2446 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2447 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
2448 | } else { |
2449 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
2450 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
2451 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2452 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
6a1aa64f | 2453 | } |
6a1aa64f DV |
2454 | }; |
2455 | ||
2456 | /** | |
2457 | * Parses a string in a special csv format. We expect a csv file where each | |
2458 | * line is a date point, and the first field in each line is the date string. | |
2459 | * We also expect that all remaining fields represent series. | |
285a6bda | 2460 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f DV |
2461 | * date, series1, stddev1, series2, stddev2, ... |
2462 | * @param {Array.<Object>} data See above. | |
2463 | * @private | |
285a6bda DV |
2464 | * |
2465 | * @return Array.<Object> An array with one entry for each row. These entries | |
2466 | * are an array of cells in that row. The first entry is the parsed x-value for | |
2467 | * the row. The second, third, etc. are the y-values. These can take on one of | |
2468 | * three forms, depending on the CSV and constructor parameters: | |
2469 | * 1. numeric value | |
2470 | * 2. [ value, stddev ] | |
2471 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 2472 | */ |
285a6bda | 2473 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f DV |
2474 | var ret = []; |
2475 | var lines = data.split("\n"); | |
3d67f03b DV |
2476 | |
2477 | // Use the default delimiter or fall back to a tab if that makes sense. | |
2478 | var delim = this.attr_('delimiter'); | |
2479 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { | |
2480 | delim = '\t'; | |
2481 | } | |
2482 | ||
285a6bda | 2483 | var start = 0; |
6a1aa64f | 2484 | if (this.labelsFromCSV_) { |
285a6bda | 2485 | start = 1; |
3d67f03b | 2486 | this.attrs_.labels = lines[0].split(delim); |
6a1aa64f DV |
2487 | } |
2488 | ||
03b522a4 DV |
2489 | // Parse the x as a float or return null if it's not a number. |
2490 | var parseFloatOrNull = function(x) { | |
41333ec0 | 2491 | var val = parseFloat(x); |
1f7f664b DV |
2492 | // isFinite() returns false for NaN and +/-Infinity. |
2493 | return isFinite(val) ? val : null; | |
03b522a4 DV |
2494 | }; |
2495 | ||
285a6bda DV |
2496 | var xParser; |
2497 | var defaultParserSet = false; // attempt to auto-detect x value type | |
2498 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 2499 | var outOfOrder = false; |
6a1aa64f DV |
2500 | for (var i = start; i < lines.length; i++) { |
2501 | var line = lines[i]; | |
2502 | if (line.length == 0) continue; // skip blank lines | |
3d67f03b DV |
2503 | if (line[0] == '#') continue; // skip comment lines |
2504 | var inFields = line.split(delim); | |
285a6bda | 2505 | if (inFields.length < 2) continue; |
6a1aa64f DV |
2506 | |
2507 | var fields = []; | |
285a6bda DV |
2508 | if (!defaultParserSet) { |
2509 | this.detectTypeFromString_(inFields[0]); | |
2510 | xParser = this.attr_("xValueParser"); | |
2511 | defaultParserSet = true; | |
2512 | } | |
2513 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
2514 | |
2515 | // If fractions are expected, parse the numbers as "A/B" | |
2516 | if (this.fractions_) { | |
2517 | for (var j = 1; j < inFields.length; j++) { | |
2518 | // TODO(danvk): figure out an appropriate way to flag parse errors. | |
2519 | var vals = inFields[j].split("/"); | |
03b522a4 | 2520 | fields[j] = [parseFloatOrNull(vals[0]), parseFloatOrNull(vals[1])]; |
6a1aa64f | 2521 | } |
285a6bda | 2522 | } else if (this.attr_("errorBars")) { |
6a1aa64f DV |
2523 | // If there are error bars, values are (value, stddev) pairs |
2524 | for (var j = 1; j < inFields.length; j += 2) | |
03b522a4 DV |
2525 | fields[(j + 1) / 2] = [parseFloatOrNull(inFields[j]), |
2526 | parseFloatOrNull(inFields[j + 1])]; | |
9922b78b | 2527 | } else if (this.attr_("customBars")) { |
6a1aa64f DV |
2528 | // Bars are a low;center;high tuple |
2529 | for (var j = 1; j < inFields.length; j++) { | |
2530 | var vals = inFields[j].split(";"); | |
03b522a4 DV |
2531 | fields[j] = [ parseFloatOrNull(vals[0]), |
2532 | parseFloatOrNull(vals[1]), | |
2533 | parseFloatOrNull(vals[2]) ]; | |
6a1aa64f DV |
2534 | } |
2535 | } else { | |
2536 | // Values are just numbers | |
285a6bda | 2537 | for (var j = 1; j < inFields.length; j++) { |
03b522a4 | 2538 | fields[j] = parseFloatOrNull(inFields[j]); |
285a6bda | 2539 | } |
6a1aa64f | 2540 | } |
987840a2 DV |
2541 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
2542 | outOfOrder = true; | |
2543 | } | |
6a1aa64f | 2544 | ret.push(fields); |
285a6bda DV |
2545 | |
2546 | if (fields.length != expectedCols) { | |
2547 | this.error("Number of columns in line " + i + " (" + fields.length + | |
2548 | ") does not agree with number of labels (" + expectedCols + | |
2549 | ") " + line); | |
2550 | } | |
6a1aa64f | 2551 | } |
987840a2 DV |
2552 | |
2553 | if (outOfOrder) { | |
2554 | this.warn("CSV is out of order; order it correctly to speed loading."); | |
2555 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2556 | } | |
2557 | ||
6a1aa64f DV |
2558 | return ret; |
2559 | }; | |
2560 | ||
2561 | /** | |
285a6bda DV |
2562 | * The user has provided their data as a pre-packaged JS array. If the x values |
2563 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
2564 | * are dates, we need to convert them from Date objects to ms since epoch. | |
2565 | * @param {Array.<Object>} data | |
2566 | * @return {Array.<Object>} data with numeric x values. | |
2567 | */ | |
2568 | Dygraph.prototype.parseArray_ = function(data) { | |
2569 | // Peek at the first x value to see if it's numeric. | |
2570 | if (data.length == 0) { | |
2571 | this.error("Can't plot empty data set"); | |
2572 | return null; | |
2573 | } | |
2574 | if (data[0].length == 0) { | |
2575 | this.error("Data set cannot contain an empty row"); | |
2576 | return null; | |
2577 | } | |
2578 | ||
2579 | if (this.attr_("labels") == null) { | |
2580 | this.warn("Using default labels. Set labels explicitly via 'labels' " + | |
2581 | "in the options parameter"); | |
2582 | this.attrs_.labels = [ "X" ]; | |
2583 | for (var i = 1; i < data[0].length; i++) { | |
2584 | this.attrs_.labels.push("Y" + i); | |
2585 | } | |
2586 | } | |
2587 | ||
2dda3850 | 2588 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda DV |
2589 | // Some intelligent defaults for a date x-axis. |
2590 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
bf640e56 | 2591 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
2592 | this.attrs_.xTicker = Dygraph.dateTicker; |
2593 | ||
2594 | // Assume they're all dates. | |
e3ab7b40 | 2595 | var parsedData = Dygraph.clone(data); |
285a6bda DV |
2596 | for (var i = 0; i < data.length; i++) { |
2597 | if (parsedData[i].length == 0) { | |
a323ff4a | 2598 | this.error("Row " + (1 + i) + " of data is empty"); |
285a6bda DV |
2599 | return null; |
2600 | } | |
2601 | if (parsedData[i][0] == null | |
3a909ec5 DV |
2602 | || typeof(parsedData[i][0].getTime) != 'function' |
2603 | || isNaN(parsedData[i][0].getTime())) { | |
be96a1f5 | 2604 | this.error("x value in row " + (1 + i) + " is not a Date"); |
285a6bda DV |
2605 | return null; |
2606 | } | |
2607 | parsedData[i][0] = parsedData[i][0].getTime(); | |
2608 | } | |
2609 | return parsedData; | |
2610 | } else { | |
2611 | // Some intelligent defaults for a numeric x-axis. | |
2612 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
2613 | this.attrs_.xTicker = Dygraph.numericTicks; | |
2614 | return data; | |
2615 | } | |
2616 | }; | |
2617 | ||
2618 | /** | |
79420a1e DV |
2619 | * Parses a DataTable object from gviz. |
2620 | * The data is expected to have a first column that is either a date or a | |
2621 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
2622 | * between this.xValueParser_ and the type of the first column, it will be | |
a685723c | 2623 | * fixed. Fills out rawData_. |
79420a1e DV |
2624 | * @param {Array.<Object>} data See above. |
2625 | * @private | |
2626 | */ | |
285a6bda | 2627 | Dygraph.prototype.parseDataTable_ = function(data) { |
79420a1e DV |
2628 | var cols = data.getNumberOfColumns(); |
2629 | var rows = data.getNumberOfRows(); | |
2630 | ||
d955e223 | 2631 | var indepType = data.getColumnType(0); |
4440f6c8 | 2632 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda DV |
2633 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
2634 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2635 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2636 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
33127159 | 2637 | } else if (indepType == 'number') { |
285a6bda DV |
2638 | this.attrs_.xValueFormatter = function(x) { return x; }; |
2639 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
2640 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2641 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
285a6bda | 2642 | } else { |
987840a2 DV |
2643 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
2644 | "column 1 of DataTable input (Got '" + indepType + "')"); | |
79420a1e DV |
2645 | return null; |
2646 | } | |
2647 | ||
a685723c DV |
2648 | // Array of the column indices which contain data (and not annotations). |
2649 | var colIdx = []; | |
2650 | var annotationCols = {}; // data index -> [annotation cols] | |
2651 | var hasAnnotations = false; | |
2652 | for (var i = 1; i < cols; i++) { | |
2653 | var type = data.getColumnType(i); | |
2654 | if (type == 'number') { | |
2655 | colIdx.push(i); | |
2656 | } else if (type == 'string' && this.attr_('displayAnnotations')) { | |
2657 | // This is OK -- it's an annotation column. | |
2658 | var dataIdx = colIdx[colIdx.length - 1]; | |
2659 | if (!annotationCols.hasOwnProperty(dataIdx)) { | |
2660 | annotationCols[dataIdx] = [i]; | |
2661 | } else { | |
2662 | annotationCols[dataIdx].push(i); | |
2663 | } | |
2664 | hasAnnotations = true; | |
2665 | } else { | |
2666 | this.error("Only 'number' is supported as a dependent type with Gviz." + | |
2667 | " 'string' is only supported if displayAnnotations is true"); | |
2668 | } | |
2669 | } | |
2670 | ||
2671 | // Read column labels | |
2672 | // TODO(danvk): add support back for errorBars | |
2673 | var labels = [data.getColumnLabel(0)]; | |
2674 | for (var i = 0; i < colIdx.length; i++) { | |
2675 | labels.push(data.getColumnLabel(colIdx[i])); | |
f9348814 | 2676 | if (this.attr_("errorBars")) i += 1; |
a685723c DV |
2677 | } |
2678 | this.attrs_.labels = labels; | |
2679 | cols = labels.length; | |
2680 | ||
79420a1e | 2681 | var ret = []; |
987840a2 | 2682 | var outOfOrder = false; |
a685723c | 2683 | var annotations = []; |
79420a1e DV |
2684 | for (var i = 0; i < rows; i++) { |
2685 | var row = []; | |
debe4434 DV |
2686 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
2687 | data.getValue(i, 0) === null) { | |
129569a5 FD |
2688 | this.warn("Ignoring row " + i + |
2689 | " of DataTable because of undefined or null first column."); | |
debe4434 DV |
2690 | continue; |
2691 | } | |
2692 | ||
c21d2c2d | 2693 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
2694 | row.push(data.getValue(i, 0).getTime()); |
2695 | } else { | |
2696 | row.push(data.getValue(i, 0)); | |
2697 | } | |
3e3f84e4 | 2698 | if (!this.attr_("errorBars")) { |
a685723c DV |
2699 | for (var j = 0; j < colIdx.length; j++) { |
2700 | var col = colIdx[j]; | |
2701 | row.push(data.getValue(i, col)); | |
2702 | if (hasAnnotations && | |
2703 | annotationCols.hasOwnProperty(col) && | |
2704 | data.getValue(i, annotationCols[col][0]) != null) { | |
2705 | var ann = {}; | |
2706 | ann.series = data.getColumnLabel(col); | |
2707 | ann.xval = row[0]; | |
2708 | ann.shortText = String.fromCharCode(65 /* A */ + annotations.length) | |
2709 | ann.text = ''; | |
2710 | for (var k = 0; k < annotationCols[col].length; k++) { | |
2711 | if (k) ann.text += "\n"; | |
2712 | ann.text += data.getValue(i, annotationCols[col][k]); | |
2713 | } | |
2714 | annotations.push(ann); | |
2715 | } | |
3e3f84e4 DV |
2716 | } |
2717 | } else { | |
2718 | for (var j = 0; j < cols - 1; j++) { | |
2719 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); | |
2720 | } | |
79420a1e | 2721 | } |
987840a2 DV |
2722 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
2723 | outOfOrder = true; | |
2724 | } | |
1f7f664b DV |
2725 | |
2726 | // Strip out infinities, which give dygraphs problems later on. | |
2727 | for (var j = 0; j < row.length; j++) { | |
2728 | if (!isFinite(row[j])) row[j] = null; | |
2729 | } | |
243d96e8 | 2730 | ret.push(row); |
79420a1e | 2731 | } |
987840a2 DV |
2732 | |
2733 | if (outOfOrder) { | |
2734 | this.warn("DataTable is out of order; order it correctly to speed loading."); | |
2735 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2736 | } | |
a685723c DV |
2737 | this.rawData_ = ret; |
2738 | ||
2739 | if (annotations.length > 0) { | |
2740 | this.setAnnotations(annotations, true); | |
2741 | } | |
79420a1e DV |
2742 | } |
2743 | ||
24e5350c | 2744 | // These functions are all based on MochiKit. |
fc80a396 DV |
2745 | Dygraph.update = function (self, o) { |
2746 | if (typeof(o) != 'undefined' && o !== null) { | |
2747 | for (var k in o) { | |
85b99f0b DV |
2748 | if (o.hasOwnProperty(k)) { |
2749 | self[k] = o[k]; | |
2750 | } | |
fc80a396 DV |
2751 | } |
2752 | } | |
2753 | return self; | |
2754 | }; | |
2755 | ||
2dda3850 DV |
2756 | Dygraph.isArrayLike = function (o) { |
2757 | var typ = typeof(o); | |
2758 | if ( | |
c21d2c2d | 2759 | (typ != 'object' && !(typ == 'function' && |
2dda3850 DV |
2760 | typeof(o.item) == 'function')) || |
2761 | o === null || | |
2762 | typeof(o.length) != 'number' || | |
2763 | o.nodeType === 3 | |
2764 | ) { | |
2765 | return false; | |
2766 | } | |
2767 | return true; | |
2768 | }; | |
2769 | ||
2770 | Dygraph.isDateLike = function (o) { | |
2771 | if (typeof(o) != "object" || o === null || | |
2772 | typeof(o.getTime) != 'function') { | |
2773 | return false; | |
2774 | } | |
2775 | return true; | |
2776 | }; | |
2777 | ||
e3ab7b40 DV |
2778 | Dygraph.clone = function(o) { |
2779 | // TODO(danvk): figure out how MochiKit's version works | |
2780 | var r = []; | |
2781 | for (var i = 0; i < o.length; i++) { | |
2782 | if (Dygraph.isArrayLike(o[i])) { | |
2783 | r.push(Dygraph.clone(o[i])); | |
2784 | } else { | |
2785 | r.push(o[i]); | |
2786 | } | |
2787 | } | |
2788 | return r; | |
24e5350c DV |
2789 | }; |
2790 | ||
2dda3850 | 2791 | |
79420a1e | 2792 | /** |
6a1aa64f DV |
2793 | * Get the CSV data. If it's in a function, call that function. If it's in a |
2794 | * file, do an XMLHttpRequest to get it. | |
2795 | * @private | |
2796 | */ | |
285a6bda | 2797 | Dygraph.prototype.start_ = function() { |
6a1aa64f | 2798 | if (typeof this.file_ == 'function') { |
285a6bda | 2799 | // CSV string. Pretend we got it via XHR. |
6a1aa64f | 2800 | this.loadedEvent_(this.file_()); |
2dda3850 | 2801 | } else if (Dygraph.isArrayLike(this.file_)) { |
285a6bda | 2802 | this.rawData_ = this.parseArray_(this.file_); |
26ca7938 | 2803 | this.predraw_(); |
79420a1e DV |
2804 | } else if (typeof this.file_ == 'object' && |
2805 | typeof this.file_.getColumnRange == 'function') { | |
2806 | // must be a DataTable from gviz. | |
a685723c | 2807 | this.parseDataTable_(this.file_); |
26ca7938 | 2808 | this.predraw_(); |
285a6bda DV |
2809 | } else if (typeof this.file_ == 'string') { |
2810 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. | |
2811 | if (this.file_.indexOf('\n') >= 0) { | |
2812 | this.loadedEvent_(this.file_); | |
2813 | } else { | |
2814 | var req = new XMLHttpRequest(); | |
2815 | var caller = this; | |
2816 | req.onreadystatechange = function () { | |
2817 | if (req.readyState == 4) { | |
2818 | if (req.status == 200) { | |
2819 | caller.loadedEvent_(req.responseText); | |
2820 | } | |
6a1aa64f | 2821 | } |
285a6bda | 2822 | }; |
6a1aa64f | 2823 | |
285a6bda DV |
2824 | req.open("GET", this.file_, true); |
2825 | req.send(null); | |
2826 | } | |
2827 | } else { | |
2828 | this.error("Unknown data format: " + (typeof this.file_)); | |
6a1aa64f DV |
2829 | } |
2830 | }; | |
2831 | ||
2832 | /** | |
2833 | * Changes various properties of the graph. These can include: | |
2834 | * <ul> | |
2835 | * <li>file: changes the source data for the graph</li> | |
2836 | * <li>errorBars: changes whether the data contains stddev</li> | |
2837 | * </ul> | |
2838 | * @param {Object} attrs The new properties and values | |
2839 | */ | |
285a6bda DV |
2840 | Dygraph.prototype.updateOptions = function(attrs) { |
2841 | // TODO(danvk): this is a mess. Rethink this function. | |
c65f2303 | 2842 | if ('rollPeriod' in attrs) { |
6a1aa64f DV |
2843 | this.rollPeriod_ = attrs.rollPeriod; |
2844 | } | |
c65f2303 | 2845 | if ('dateWindow' in attrs) { |
6a1aa64f DV |
2846 | this.dateWindow_ = attrs.dateWindow; |
2847 | } | |
450fe64b DV |
2848 | |
2849 | // TODO(danvk): validate per-series options. | |
46dde5f9 DV |
2850 | // Supported: |
2851 | // strokeWidth | |
2852 | // pointSize | |
2853 | // drawPoints | |
2854 | // highlightCircleSize | |
450fe64b | 2855 | |
fc80a396 | 2856 | Dygraph.update(this.user_attrs_, attrs); |
87bb7958 | 2857 | Dygraph.update(this.renderOptions_, attrs); |
285a6bda DV |
2858 | |
2859 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
2860 | ||
2861 | // TODO(danvk): this doesn't match the constructor logic | |
2862 | this.layout_.updateOptions({ 'errorBars': this.attr_("errorBars") }); | |
5e50289f | 2863 | if (attrs['file']) { |
6a1aa64f DV |
2864 | this.file_ = attrs['file']; |
2865 | this.start_(); | |
2866 | } else { | |
26ca7938 | 2867 | this.predraw_(); |
6a1aa64f DV |
2868 | } |
2869 | }; | |
2870 | ||
2871 | /** | |
697e70b2 DV |
2872 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
2873 | * containing div (which has presumably changed size since the dygraph was | |
2874 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
2875 | * |
2876 | * This is far more efficient than destroying and re-instantiating a | |
2877 | * Dygraph, since it doesn't have to reparse the underlying data. | |
2878 | * | |
697e70b2 DV |
2879 | * @param {Number} width Width (in pixels) |
2880 | * @param {Number} height Height (in pixels) | |
2881 | */ | |
2882 | Dygraph.prototype.resize = function(width, height) { | |
e8c7ef86 DV |
2883 | if (this.resize_lock) { |
2884 | return; | |
2885 | } | |
2886 | this.resize_lock = true; | |
2887 | ||
697e70b2 DV |
2888 | if ((width === null) != (height === null)) { |
2889 | this.warn("Dygraph.resize() should be called with zero parameters or " + | |
2890 | "two non-NULL parameters. Pretending it was zero."); | |
2891 | width = height = null; | |
2892 | } | |
2893 | ||
b16e6369 | 2894 | // TODO(danvk): there should be a clear() method. |
697e70b2 | 2895 | this.maindiv_.innerHTML = ""; |
b16e6369 DV |
2896 | this.attrs_.labelsDiv = null; |
2897 | ||
697e70b2 DV |
2898 | if (width) { |
2899 | this.maindiv_.style.width = width + "px"; | |
2900 | this.maindiv_.style.height = height + "px"; | |
2901 | this.width_ = width; | |
2902 | this.height_ = height; | |
2903 | } else { | |
2904 | this.width_ = this.maindiv_.offsetWidth; | |
2905 | this.height_ = this.maindiv_.offsetHeight; | |
2906 | } | |
2907 | ||
2908 | this.createInterface_(); | |
26ca7938 | 2909 | this.predraw_(); |
e8c7ef86 DV |
2910 | |
2911 | this.resize_lock = false; | |
697e70b2 DV |
2912 | }; |
2913 | ||
2914 | /** | |
6a1aa64f DV |
2915 | * Adjusts the number of days in the rolling average. Updates the graph to |
2916 | * reflect the new averaging period. | |
2917 | * @param {Number} length Number of days over which to average the data. | |
2918 | */ | |
285a6bda | 2919 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f | 2920 | this.rollPeriod_ = length; |
26ca7938 | 2921 | this.predraw_(); |
6a1aa64f | 2922 | }; |
540d00f1 | 2923 | |
f8cfec73 | 2924 | /** |
1cf11047 DV |
2925 | * Returns a boolean array of visibility statuses. |
2926 | */ | |
2927 | Dygraph.prototype.visibility = function() { | |
2928 | // Do lazy-initialization, so that this happens after we know the number of | |
2929 | // data series. | |
2930 | if (!this.attr_("visibility")) { | |
f38dec01 | 2931 | this.attrs_["visibility"] = []; |
1cf11047 DV |
2932 | } |
2933 | while (this.attr_("visibility").length < this.rawData_[0].length - 1) { | |
f38dec01 | 2934 | this.attr_("visibility").push(true); |
1cf11047 DV |
2935 | } |
2936 | return this.attr_("visibility"); | |
2937 | }; | |
2938 | ||
2939 | /** | |
2940 | * Changes the visiblity of a series. | |
2941 | */ | |
2942 | Dygraph.prototype.setVisibility = function(num, value) { | |
2943 | var x = this.visibility(); | |
a6c109c1 | 2944 | if (num < 0 || num >= x.length) { |
1cf11047 DV |
2945 | this.warn("invalid series number in setVisibility: " + num); |
2946 | } else { | |
2947 | x[num] = value; | |
26ca7938 | 2948 | this.predraw_(); |
1cf11047 DV |
2949 | } |
2950 | }; | |
2951 | ||
2952 | /** | |
5c528fa2 DV |
2953 | * Update the list of annotations and redraw the chart. |
2954 | */ | |
a685723c | 2955 | Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { |
3c51ab74 DV |
2956 | // Only add the annotation CSS rule once we know it will be used. |
2957 | Dygraph.addAnnotationRule(); | |
5c528fa2 DV |
2958 | this.annotations_ = ann; |
2959 | this.layout_.setAnnotations(this.annotations_); | |
a685723c | 2960 | if (!suppressDraw) { |
26ca7938 | 2961 | this.predraw_(); |
a685723c | 2962 | } |
5c528fa2 DV |
2963 | }; |
2964 | ||
2965 | /** | |
2966 | * Return the list of annotations. | |
2967 | */ | |
2968 | Dygraph.prototype.annotations = function() { | |
2969 | return this.annotations_; | |
2970 | }; | |
2971 | ||
46dde5f9 DV |
2972 | /** |
2973 | * Get the index of a series (column) given its name. The first column is the | |
2974 | * x-axis, so the data series start with index 1. | |
2975 | */ | |
2976 | Dygraph.prototype.indexFromSetName = function(name) { | |
2977 | var labels = this.attr_("labels"); | |
2978 | for (var i = 0; i < labels.length; i++) { | |
2979 | if (labels[i] == name) return i; | |
2980 | } | |
2981 | return null; | |
2982 | }; | |
2983 | ||
5c528fa2 DV |
2984 | Dygraph.addAnnotationRule = function() { |
2985 | if (Dygraph.addedAnnotationCSS) return; | |
2986 | ||
5c528fa2 DV |
2987 | var rule = "border: 1px solid black; " + |
2988 | "background-color: white; " + | |
2989 | "text-align: center;"; | |
22186871 DV |
2990 | |
2991 | var styleSheetElement = document.createElement("style"); | |
2992 | styleSheetElement.type = "text/css"; | |
2993 | document.getElementsByTagName("head")[0].appendChild(styleSheetElement); | |
2994 | ||
2995 | // Find the first style sheet that we can access. | |
2996 | // We may not add a rule to a style sheet from another domain for security | |
2997 | // reasons. This sometimes comes up when using gviz, since the Google gviz JS | |
2998 | // adds its own style sheets from google.com. | |
2999 | for (var i = 0; i < document.styleSheets.length; i++) { | |
3000 | if (document.styleSheets[i].disabled) continue; | |
3001 | var mysheet = document.styleSheets[i]; | |
3002 | try { | |
3003 | if (mysheet.insertRule) { // Firefox | |
3004 | var idx = mysheet.cssRules ? mysheet.cssRules.length : 0; | |
3005 | mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", idx); | |
3006 | } else if (mysheet.addRule) { // IE | |
3007 | mysheet.addRule(".dygraphDefaultAnnotation", rule); | |
3008 | } | |
3009 | Dygraph.addedAnnotationCSS = true; | |
3010 | return; | |
3011 | } catch(err) { | |
3012 | // Was likely a security exception. | |
3013 | } | |
5c528fa2 DV |
3014 | } |
3015 | ||
22186871 | 3016 | this.warn("Unable to add default annotation CSS rule; display may be off."); |
5c528fa2 DV |
3017 | } |
3018 | ||
3019 | /** | |
f8cfec73 DV |
3020 | * Create a new canvas element. This is more complex than a simple |
3021 | * document.createElement("canvas") because of IE and excanvas. | |
3022 | */ | |
3023 | Dygraph.createCanvas = function() { | |
3024 | var canvas = document.createElement("canvas"); | |
3025 | ||
3026 | isIE = (/MSIE/.test(navigator.userAgent) && !window.opera); | |
8b8f2d59 | 3027 | if (isIE && (typeof(G_vmlCanvasManager) != 'undefined')) { |
f8cfec73 DV |
3028 | canvas = G_vmlCanvasManager.initElement(canvas); |
3029 | } | |
3030 | ||
3031 | return canvas; | |
3032 | }; | |
3033 | ||
540d00f1 DV |
3034 | |
3035 | /** | |
285a6bda | 3036 | * A wrapper around Dygraph that implements the gviz API. |
540d00f1 DV |
3037 | * @param {Object} container The DOM object the visualization should live in. |
3038 | */ | |
285a6bda | 3039 | Dygraph.GVizChart = function(container) { |
540d00f1 DV |
3040 | this.container = container; |
3041 | } | |
3042 | ||
285a6bda | 3043 | Dygraph.GVizChart.prototype.draw = function(data, options) { |
c91f4ae8 DV |
3044 | // Clear out any existing dygraph. |
3045 | // TODO(danvk): would it make more sense to simply redraw using the current | |
3046 | // date_graph object? | |
540d00f1 | 3047 | this.container.innerHTML = ''; |
c91f4ae8 DV |
3048 | if (typeof(this.date_graph) != 'undefined') { |
3049 | this.date_graph.destroy(); | |
3050 | } | |
3051 | ||
285a6bda | 3052 | this.date_graph = new Dygraph(this.container, data, options); |
540d00f1 | 3053 | } |
285a6bda | 3054 | |
239c712d NAG |
3055 | /** |
3056 | * Google charts compatible setSelection | |
50360fd0 | 3057 | * Only row selection is supported, all points in the row will be highlighted |
239c712d NAG |
3058 | * @param {Array} array of the selected cells |
3059 | * @public | |
3060 | */ | |
3061 | Dygraph.GVizChart.prototype.setSelection = function(selection_array) { | |
3062 | var row = false; | |
3063 | if (selection_array.length) { | |
3064 | row = selection_array[0].row; | |
3065 | } | |
3066 | this.date_graph.setSelection(row); | |
3067 | } | |
3068 | ||
103b7292 NAG |
3069 | /** |
3070 | * Google charts compatible getSelection implementation | |
3071 | * @return {Array} array of the selected cells | |
3072 | * @public | |
3073 | */ | |
3074 | Dygraph.GVizChart.prototype.getSelection = function() { | |
3075 | var selection = []; | |
50360fd0 | 3076 | |
103b7292 | 3077 | var row = this.date_graph.getSelection(); |
50360fd0 | 3078 | |
103b7292 | 3079 | if (row < 0) return selection; |
50360fd0 | 3080 | |
103b7292 NAG |
3081 | col = 1; |
3082 | for (var i in this.date_graph.layout_.datasets) { | |
3083 | selection.push({row: row, column: col}); | |
3084 | col++; | |
3085 | } | |
3086 | ||
3087 | return selection; | |
3088 | } | |
3089 | ||
285a6bda DV |
3090 | // Older pages may still use this name. |
3091 | DateGraph = Dygraph; |