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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 | ||
727439b4 | 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 | |
885c13e4 | 82 | |
8e4a6af3 | 83 | // Default attribute values. |
285a6bda | 84 | Dygraph.DEFAULT_ATTRS = { |
a9fc39ab | 85 | highlightCircleSize: 3, |
8e4a6af3 | 86 | pixelsPerXLabel: 60, |
c6336f04 | 87 | pixelsPerYLabel: 30, |
285a6bda | 88 | |
8e4a6af3 DV |
89 | labelsDivWidth: 250, |
90 | labelsDivStyles: { | |
91 | // TODO(danvk): move defaults from createStatusMessage_ here. | |
285a6bda DV |
92 | }, |
93 | labelsSeparateLines: false, | |
bcd3ebf0 | 94 | labelsShowZeroValues: true, |
285a6bda | 95 | labelsKMB: false, |
afefbcdb | 96 | labelsKMG2: false, |
d160cc3b | 97 | showLabelsOnHighlight: true, |
12e4c741 | 98 | |
3c1d225b | 99 | yValueFormatter: function(x, opt_numDigits) { |
6be8e54c | 100 | return x.toPrecision(Math.min(21, Math.max(1, opt_numDigits || 2))); |
3c1d225b | 101 | }, |
285a6bda DV |
102 | |
103 | strokeWidth: 1.0, | |
8e4a6af3 | 104 | |
8846615a DV |
105 | axisTickSize: 3, |
106 | axisLabelFontSize: 14, | |
107 | xAxisLabelWidth: 50, | |
108 | yAxisLabelWidth: 50, | |
bf640e56 | 109 | xAxisLabelFormatter: Dygraph.dateAxisFormatter, |
8846615a | 110 | rightGap: 5, |
285a6bda DV |
111 | |
112 | showRoller: false, | |
113 | xValueFormatter: Dygraph.dateString_, | |
114 | xValueParser: Dygraph.dateParser, | |
115 | xTicker: Dygraph.dateTicker, | |
116 | ||
3d67f03b DV |
117 | delimiter: ',', |
118 | ||
ff00d3e2 | 119 | logScale: false, |
285a6bda DV |
120 | sigma: 2.0, |
121 | errorBars: false, | |
122 | fractions: false, | |
123 | wilsonInterval: true, // only relevant if fractions is true | |
5954ef32 | 124 | customBars: false, |
43af96e7 NK |
125 | fillGraph: false, |
126 | fillAlpha: 0.15, | |
f032c51d | 127 | connectSeparatedPoints: false, |
43af96e7 NK |
128 | |
129 | stackedGraph: false, | |
afdc483f NN |
130 | hideOverlayOnMouseOut: true, |
131 | ||
00c281d4 | 132 | stepPlot: false, |
ee672584 | 133 | avoidMinZero: false, |
4f0c5aa0 DV |
134 | |
135 | interactionModel: null // will be set to Dygraph.defaultInteractionModel. | |
285a6bda DV |
136 | }; |
137 | ||
138 | // Various logging levels. | |
139 | Dygraph.DEBUG = 1; | |
140 | Dygraph.INFO = 2; | |
141 | Dygraph.WARNING = 3; | |
142 | Dygraph.ERROR = 3; | |
143 | ||
39b0e098 RK |
144 | // Directions for panning and zooming. Use bit operations when combined |
145 | // values are possible. | |
146 | Dygraph.HORIZONTAL = 1; | |
147 | Dygraph.VERTICAL = 2; | |
148 | ||
5c528fa2 DV |
149 | // Used for initializing annotation CSS rules only once. |
150 | Dygraph.addedAnnotationCSS = false; | |
151 | ||
285a6bda DV |
152 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { |
153 | // Labels is no longer a constructor parameter, since it's typically set | |
154 | // directly from the data source. It also conains a name for the x-axis, | |
155 | // which the previous constructor form did not. | |
156 | if (labels != null) { | |
157 | var new_labels = ["Date"]; | |
158 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); | |
fc80a396 | 159 | Dygraph.update(attrs, { 'labels': new_labels }); |
285a6bda DV |
160 | } |
161 | this.__init__(div, file, attrs); | |
8e4a6af3 DV |
162 | }; |
163 | ||
6a1aa64f | 164 | /** |
285a6bda | 165 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
885c13e4 | 166 | * and context <canvas> inside of it. See the constructor for details. |
6a1aa64f | 167 | * on the parameters. |
12e4c741 | 168 | * @param {Element} div the Element to render the graph into. |
6a1aa64f | 169 | * @param {String | Function} file Source data |
6a1aa64f DV |
170 | * @param {Object} attrs Miscellaneous other options |
171 | * @private | |
172 | */ | |
285a6bda | 173 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
a2c8fff4 DV |
174 | // Hack for IE: if we're using excanvas and the document hasn't finished |
175 | // loading yet (and hence may not have initialized whatever it needs to | |
176 | // initialize), then keep calling this routine periodically until it has. | |
177 | if (/MSIE/.test(navigator.userAgent) && !window.opera && | |
178 | typeof(G_vmlCanvasManager) != 'undefined' && | |
179 | document.readyState != 'complete') { | |
180 | var self = this; | |
181 | setTimeout(function() { self.__init__(div, file, attrs) }, 100); | |
182 | } | |
183 | ||
285a6bda DV |
184 | // Support two-argument constructor |
185 | if (attrs == null) { attrs = {}; } | |
186 | ||
6a1aa64f | 187 | // Copy the important bits into the object |
32988383 | 188 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
6a1aa64f | 189 | this.maindiv_ = div; |
6a1aa64f | 190 | this.file_ = file; |
285a6bda | 191 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
6a1aa64f | 192 | this.previousVerticalX_ = -1; |
6a1aa64f | 193 | this.fractions_ = attrs.fractions || false; |
6a1aa64f | 194 | this.dateWindow_ = attrs.dateWindow || null; |
8b83c6cc | 195 | |
6a1aa64f | 196 | this.wilsonInterval_ = attrs.wilsonInterval || true; |
fe0b7c03 | 197 | this.is_initial_draw_ = true; |
5c528fa2 | 198 | this.annotations_ = []; |
6be8e54c JB |
199 | |
200 | // Number of digits to use when labeling the x (if numeric) and y axis | |
201 | // ticks. | |
202 | this.numXDigits_ = 2; | |
203 | this.numYDigits_ = 2; | |
204 | ||
205 | // When labeling x (if numeric) or y values in the legend, there are | |
206 | // numDigits + numExtraDigits of precision used. For axes labels with N | |
207 | // digits of precision, the data should be displayed with at least N+1 digits | |
208 | // of precision. The reason for this is to divide each interval between | |
209 | // successive ticks into tenths (for 1) or hundredths (for 2), etc. For | |
210 | // example, if the labels are [0, 1, 2], we want data to be displayed as | |
211 | // 0.1, 1.3, etc. | |
212 | this.numExtraDigits_ = 1; | |
8e4a6af3 | 213 | |
f7d6278e DV |
214 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
215 | // div, then only one will be drawn. | |
216 | div.innerHTML = ""; | |
217 | ||
c21d2c2d | 218 | // If the div isn't already sized then inherit from our attrs or |
219 | // give it a default size. | |
285a6bda | 220 | if (div.style.width == '') { |
ddd1b11f | 221 | div.style.width = (attrs.width || Dygraph.DEFAULT_WIDTH) + "px"; |
285a6bda DV |
222 | } |
223 | if (div.style.height == '') { | |
ddd1b11f | 224 | div.style.height = (attrs.height || Dygraph.DEFAULT_HEIGHT) + "px"; |
32988383 | 225 | } |
285a6bda DV |
226 | this.width_ = parseInt(div.style.width, 10); |
227 | this.height_ = parseInt(div.style.height, 10); | |
c21d2c2d | 228 | // The div might have been specified as percent of the current window size, |
229 | // convert that to an appropriate number of pixels. | |
230 | if (div.style.width.indexOf("%") == div.style.width.length - 1) { | |
c6f45033 | 231 | this.width_ = div.offsetWidth; |
c21d2c2d | 232 | } |
233 | if (div.style.height.indexOf("%") == div.style.height.length - 1) { | |
c6f45033 | 234 | this.height_ = div.offsetHeight; |
c21d2c2d | 235 | } |
32988383 | 236 | |
10a6456d DV |
237 | if (this.width_ == 0) { |
238 | this.error("dygraph has zero width. Please specify a width in pixels."); | |
239 | } | |
240 | if (this.height_ == 0) { | |
241 | this.error("dygraph has zero height. Please specify a height in pixels."); | |
242 | } | |
243 | ||
344ba8c0 | 244 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
43af96e7 NK |
245 | if (attrs['stackedGraph']) { |
246 | attrs['fillGraph'] = true; | |
247 | // TODO(nikhilk): Add any other stackedGraph checks here. | |
248 | } | |
249 | ||
285a6bda DV |
250 | // Dygraphs has many options, some of which interact with one another. |
251 | // To keep track of everything, we maintain two sets of options: | |
252 | // | |
c21d2c2d | 253 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
254 | // this.attrs_ defaults, options derived from user_attrs_, data. |
255 | // | |
256 | // Options are then accessed this.attr_('attr'), which first looks at | |
257 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
258 | // defaults without overriding behavior that the user specifically asks for. | |
259 | this.user_attrs_ = {}; | |
fc80a396 | 260 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 261 | |
285a6bda | 262 | this.attrs_ = {}; |
fc80a396 | 263 | Dygraph.update(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 264 | |
16269f6e | 265 | this.boundaryIds_ = []; |
6a1aa64f | 266 | |
285a6bda DV |
267 | // Make a note of whether labels will be pulled from the CSV file. |
268 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
6a1aa64f DV |
269 | |
270 | // Create the containing DIV and other interactive elements | |
271 | this.createInterface_(); | |
272 | ||
738fc797 | 273 | this.start_(); |
6a1aa64f DV |
274 | }; |
275 | ||
227b93cc DV |
276 | Dygraph.prototype.attr_ = function(name, seriesName) { |
277 | if (seriesName && | |
278 | typeof(this.user_attrs_[seriesName]) != 'undefined' && | |
279 | this.user_attrs_[seriesName] != null && | |
280 | typeof(this.user_attrs_[seriesName][name]) != 'undefined') { | |
281 | return this.user_attrs_[seriesName][name]; | |
450fe64b | 282 | } else if (typeof(this.user_attrs_[name]) != 'undefined') { |
285a6bda DV |
283 | return this.user_attrs_[name]; |
284 | } else if (typeof(this.attrs_[name]) != 'undefined') { | |
285 | return this.attrs_[name]; | |
286 | } else { | |
287 | return null; | |
288 | } | |
289 | }; | |
290 | ||
291 | // TODO(danvk): any way I can get the line numbers to be this.warn call? | |
292 | Dygraph.prototype.log = function(severity, message) { | |
293 | if (typeof(console) != 'undefined') { | |
294 | switch (severity) { | |
295 | case Dygraph.DEBUG: | |
296 | console.debug('dygraphs: ' + message); | |
297 | break; | |
298 | case Dygraph.INFO: | |
299 | console.info('dygraphs: ' + message); | |
300 | break; | |
301 | case Dygraph.WARNING: | |
302 | console.warn('dygraphs: ' + message); | |
303 | break; | |
304 | case Dygraph.ERROR: | |
305 | console.error('dygraphs: ' + message); | |
306 | break; | |
307 | } | |
308 | } | |
309 | } | |
310 | Dygraph.prototype.info = function(message) { | |
311 | this.log(Dygraph.INFO, message); | |
312 | } | |
313 | Dygraph.prototype.warn = function(message) { | |
314 | this.log(Dygraph.WARNING, message); | |
315 | } | |
316 | Dygraph.prototype.error = function(message) { | |
317 | this.log(Dygraph.ERROR, message); | |
318 | } | |
319 | ||
6a1aa64f DV |
320 | /** |
321 | * Returns the current rolling period, as set by the user or an option. | |
3c1d225b | 322 | * @return {Number} The number of points in the rolling window |
6a1aa64f | 323 | */ |
285a6bda | 324 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 325 | return this.rollPeriod_; |
76171648 DV |
326 | }; |
327 | ||
599fb4ad DV |
328 | /** |
329 | * Returns the currently-visible x-range. This can be affected by zooming, | |
330 | * panning or a call to updateOptions. | |
331 | * Returns a two-element array: [left, right]. | |
332 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
333 | */ | |
334 | Dygraph.prototype.xAxisRange = function() { | |
335 | if (this.dateWindow_) return this.dateWindow_; | |
336 | ||
337 | // The entire chart is visible. | |
338 | var left = this.rawData_[0][0]; | |
339 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
340 | return [left, right]; | |
341 | }; | |
342 | ||
3230c662 | 343 | /** |
d58ae307 DV |
344 | * Returns the currently-visible y-range for an axis. This can be affected by |
345 | * zooming, panning or a call to updateOptions. Axis indices are zero-based. If | |
346 | * called with no arguments, returns the range of the first axis. | |
3230c662 DV |
347 | * Returns a two-element array: [bottom, top]. |
348 | */ | |
d58ae307 | 349 | Dygraph.prototype.yAxisRange = function(idx) { |
d63e6799 | 350 | if (typeof(idx) == "undefined") idx = 0; |
d58ae307 DV |
351 | if (idx < 0 || idx >= this.axes_.length) return null; |
352 | return [ this.axes_[idx].computedValueRange[0], | |
353 | this.axes_[idx].computedValueRange[1] ]; | |
354 | }; | |
355 | ||
356 | /** | |
357 | * Returns the currently-visible y-ranges for each axis. This can be affected by | |
358 | * zooming, panning, calls to updateOptions, etc. | |
359 | * Returns an array of [bottom, top] pairs, one for each y-axis. | |
360 | */ | |
361 | Dygraph.prototype.yAxisRanges = function() { | |
362 | var ret = []; | |
363 | for (var i = 0; i < this.axes_.length; i++) { | |
364 | ret.push(this.yAxisRange(i)); | |
365 | } | |
366 | return ret; | |
3230c662 DV |
367 | }; |
368 | ||
d58ae307 | 369 | // TODO(danvk): use these functions throughout dygraphs. |
3230c662 DV |
370 | /** |
371 | * Convert from data coordinates to canvas/div X/Y coordinates. | |
d58ae307 DV |
372 | * If specified, do this conversion for the coordinate system of a particular |
373 | * axis. Uses the first axis by default. | |
3230c662 DV |
374 | * Returns a two-element array: [X, Y] |
375 | */ | |
d58ae307 | 376 | Dygraph.prototype.toDomCoords = function(x, y, axis) { |
3230c662 DV |
377 | var ret = [null, null]; |
378 | var area = this.plotter_.area; | |
379 | if (x !== null) { | |
380 | var xRange = this.xAxisRange(); | |
381 | ret[0] = area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; | |
382 | } | |
383 | ||
384 | if (y !== null) { | |
d58ae307 | 385 | var yRange = this.yAxisRange(axis); |
891ad846 | 386 | ret[1] = area.y + (yRange[1] - y) / (yRange[1] - yRange[0]) * area.h; |
3230c662 DV |
387 | } |
388 | ||
389 | return ret; | |
390 | }; | |
391 | ||
392 | /** | |
393 | * Convert from canvas/div coords to data coordinates. | |
d58ae307 DV |
394 | * If specified, do this conversion for the coordinate system of a particular |
395 | * axis. Uses the first axis by default. | |
3230c662 DV |
396 | * Returns a two-element array: [X, Y] |
397 | */ | |
d58ae307 | 398 | Dygraph.prototype.toDataCoords = function(x, y, axis) { |
3230c662 DV |
399 | var ret = [null, null]; |
400 | var area = this.plotter_.area; | |
401 | if (x !== null) { | |
402 | var xRange = this.xAxisRange(); | |
403 | ret[0] = xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); | |
404 | } | |
405 | ||
406 | if (y !== null) { | |
d58ae307 | 407 | var yRange = this.yAxisRange(axis); |
3230c662 DV |
408 | ret[1] = yRange[0] + (area.h - y) / area.h * (yRange[1] - yRange[0]); |
409 | } | |
410 | ||
411 | return ret; | |
412 | }; | |
413 | ||
e99fde05 DV |
414 | /** |
415 | * Returns the number of columns (including the independent variable). | |
416 | */ | |
417 | Dygraph.prototype.numColumns = function() { | |
418 | return this.rawData_[0].length; | |
419 | }; | |
420 | ||
421 | /** | |
422 | * Returns the number of rows (excluding any header/label row). | |
423 | */ | |
424 | Dygraph.prototype.numRows = function() { | |
425 | return this.rawData_.length; | |
426 | }; | |
427 | ||
428 | /** | |
429 | * Returns the value in the given row and column. If the row and column exceed | |
430 | * the bounds on the data, returns null. Also returns null if the value is | |
431 | * missing. | |
432 | */ | |
433 | Dygraph.prototype.getValue = function(row, col) { | |
434 | if (row < 0 || row > this.rawData_.length) return null; | |
435 | if (col < 0 || col > this.rawData_[row].length) return null; | |
436 | ||
437 | return this.rawData_[row][col]; | |
438 | }; | |
439 | ||
76171648 DV |
440 | Dygraph.addEvent = function(el, evt, fn) { |
441 | var normed_fn = function(e) { | |
442 | if (!e) var e = window.event; | |
443 | fn(e); | |
444 | }; | |
445 | if (window.addEventListener) { // Mozilla, Netscape, Firefox | |
446 | el.addEventListener(evt, normed_fn, false); | |
447 | } else { // IE | |
448 | el.attachEvent('on' + evt, normed_fn); | |
449 | } | |
450 | }; | |
6a1aa64f | 451 | |
ee672584 | 452 | |
ee672584 RK |
453 | // Based on the article at |
454 | // http://www.switchonthecode.com/tutorials/javascript-tutorial-the-scroll-wheel | |
ee672584 RK |
455 | Dygraph.cancelEvent = function(e) { |
456 | e = e ? e : window.event; | |
457 | if (e.stopPropagation) { | |
458 | e.stopPropagation(); | |
459 | } | |
460 | if (e.preventDefault) { | |
461 | e.preventDefault(); | |
462 | } | |
463 | e.cancelBubble = true; | |
464 | e.cancel = true; | |
465 | e.returnValue = false; | |
466 | return false; | |
467 | } | |
468 | ||
6a1aa64f | 469 | /** |
285a6bda | 470 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 471 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 472 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
473 | * @private |
474 | */ | |
285a6bda | 475 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
476 | // Create the all-enclosing graph div |
477 | var enclosing = this.maindiv_; | |
478 | ||
b0c3b730 DV |
479 | this.graphDiv = document.createElement("div"); |
480 | this.graphDiv.style.width = this.width_ + "px"; | |
481 | this.graphDiv.style.height = this.height_ + "px"; | |
482 | enclosing.appendChild(this.graphDiv); | |
483 | ||
484 | // Create the canvas for interactive parts of the chart. | |
f8cfec73 | 485 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 DV |
486 | this.canvas_.style.position = "absolute"; |
487 | this.canvas_.width = this.width_; | |
488 | this.canvas_.height = this.height_; | |
f8cfec73 DV |
489 | this.canvas_.style.width = this.width_ + "px"; // for IE |
490 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
b0c3b730 DV |
491 | |
492 | // ... and for static parts of the chart. | |
6a1aa64f | 493 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
76171648 | 494 | |
eb7bf005 EC |
495 | // The interactive parts of the graph are drawn on top of the chart. |
496 | this.graphDiv.appendChild(this.hidden_); | |
497 | this.graphDiv.appendChild(this.canvas_); | |
498 | this.mouseEventElement_ = this.canvas_; | |
499 | ||
76171648 | 500 | var dygraph = this; |
eb7bf005 | 501 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(e) { |
76171648 DV |
502 | dygraph.mouseMove_(e); |
503 | }); | |
eb7bf005 | 504 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(e) { |
76171648 DV |
505 | dygraph.mouseOut_(e); |
506 | }); | |
697e70b2 DV |
507 | |
508 | // Create the grapher | |
509 | // TODO(danvk): why does the Layout need its own set of options? | |
510 | this.layoutOptions_ = { 'xOriginIsZero': false }; | |
511 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
512 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
513 | Dygraph.update(this.layoutOptions_, { | |
514 | 'errorBars': (this.attr_("errorBars") || this.attr_("customBars")) }); | |
515 | ||
516 | this.layout_ = new DygraphLayout(this, this.layoutOptions_); | |
517 | ||
518 | // TODO(danvk): why does the Renderer need its own set of options? | |
519 | this.renderOptions_ = { colorScheme: this.colors_, | |
520 | strokeColor: null, | |
521 | axisLineWidth: Dygraph.AXIS_LINE_WIDTH }; | |
522 | Dygraph.update(this.renderOptions_, this.attrs_); | |
523 | Dygraph.update(this.renderOptions_, this.user_attrs_); | |
697e70b2 DV |
524 | |
525 | this.createStatusMessage_(); | |
697e70b2 | 526 | this.createDragInterface_(); |
4cfcc38c DV |
527 | }; |
528 | ||
529 | /** | |
530 | * Detach DOM elements in the dygraph and null out all data references. | |
531 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
532 | * usage. See, e.g., the tests/perf.html example. | |
533 | */ | |
534 | Dygraph.prototype.destroy = function() { | |
535 | var removeRecursive = function(node) { | |
536 | while (node.hasChildNodes()) { | |
537 | removeRecursive(node.firstChild); | |
538 | node.removeChild(node.firstChild); | |
539 | } | |
540 | }; | |
541 | removeRecursive(this.maindiv_); | |
542 | ||
543 | var nullOut = function(obj) { | |
544 | for (var n in obj) { | |
545 | if (typeof(obj[n]) === 'object') { | |
546 | obj[n] = null; | |
547 | } | |
548 | } | |
549 | }; | |
550 | ||
551 | // These may not all be necessary, but it can't hurt... | |
552 | nullOut(this.layout_); | |
553 | nullOut(this.plotter_); | |
554 | nullOut(this); | |
555 | }; | |
6a1aa64f DV |
556 | |
557 | /** | |
558 | * Creates the canvas containing the PlotKit graph. Only plotkit ever draws on | |
285a6bda | 559 | * this particular canvas. All Dygraph work is done on this.canvas_. |
8846615a | 560 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
561 | * @return {Object} The newly-created canvas |
562 | * @private | |
563 | */ | |
285a6bda | 564 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 | 565 | var h = Dygraph.createCanvas(); |
6a1aa64f | 566 | h.style.position = "absolute"; |
9ac5e4ae DV |
567 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
568 | // some extra area to make it easier to zoom in on the far left and far | |
569 | // right. h needs to be precisely the plot area, so that clipping occurs. | |
6a1aa64f DV |
570 | h.style.top = canvas.style.top; |
571 | h.style.left = canvas.style.left; | |
572 | h.width = this.width_; | |
573 | h.height = this.height_; | |
f8cfec73 DV |
574 | h.style.width = this.width_ + "px"; // for IE |
575 | h.style.height = this.height_ + "px"; // for IE | |
6a1aa64f DV |
576 | return h; |
577 | }; | |
578 | ||
f474c2a3 DV |
579 | // Taken from MochiKit.Color |
580 | Dygraph.hsvToRGB = function (hue, saturation, value) { | |
581 | var red; | |
582 | var green; | |
583 | var blue; | |
584 | if (saturation === 0) { | |
585 | red = value; | |
586 | green = value; | |
587 | blue = value; | |
588 | } else { | |
589 | var i = Math.floor(hue * 6); | |
590 | var f = (hue * 6) - i; | |
591 | var p = value * (1 - saturation); | |
592 | var q = value * (1 - (saturation * f)); | |
593 | var t = value * (1 - (saturation * (1 - f))); | |
594 | switch (i) { | |
595 | case 1: red = q; green = value; blue = p; break; | |
596 | case 2: red = p; green = value; blue = t; break; | |
597 | case 3: red = p; green = q; blue = value; break; | |
598 | case 4: red = t; green = p; blue = value; break; | |
599 | case 5: red = value; green = p; blue = q; break; | |
600 | case 6: // fall through | |
601 | case 0: red = value; green = t; blue = p; break; | |
602 | } | |
603 | } | |
604 | red = Math.floor(255 * red + 0.5); | |
605 | green = Math.floor(255 * green + 0.5); | |
606 | blue = Math.floor(255 * blue + 0.5); | |
607 | return 'rgb(' + red + ',' + green + ',' + blue + ')'; | |
608 | }; | |
609 | ||
610 | ||
6a1aa64f DV |
611 | /** |
612 | * Generate a set of distinct colors for the data series. This is done with a | |
613 | * color wheel. Saturation/Value are customizable, and the hue is | |
614 | * equally-spaced around the color wheel. If a custom set of colors is | |
615 | * specified, that is used instead. | |
6a1aa64f DV |
616 | * @private |
617 | */ | |
285a6bda DV |
618 | Dygraph.prototype.setColors_ = function() { |
619 | // TODO(danvk): compute this directly into this.attrs_['colorScheme'] and do | |
620 | // away with this.renderOptions_. | |
621 | var num = this.attr_("labels").length - 1; | |
6a1aa64f | 622 | this.colors_ = []; |
285a6bda DV |
623 | var colors = this.attr_('colors'); |
624 | if (!colors) { | |
625 | var sat = this.attr_('colorSaturation') || 1.0; | |
626 | var val = this.attr_('colorValue') || 0.5; | |
2aa21213 | 627 | var half = Math.ceil(num / 2); |
6a1aa64f | 628 | for (var i = 1; i <= num; i++) { |
ec1959eb | 629 | if (!this.visibility()[i-1]) continue; |
43af96e7 | 630 | // alternate colors for high contrast. |
2aa21213 | 631 | var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2); |
43af96e7 NK |
632 | var hue = (1.0 * idx/ (1 + num)); |
633 | this.colors_.push(Dygraph.hsvToRGB(hue, sat, val)); | |
6a1aa64f DV |
634 | } |
635 | } else { | |
636 | for (var i = 0; i < num; i++) { | |
ec1959eb | 637 | if (!this.visibility()[i]) continue; |
285a6bda | 638 | var colorStr = colors[i % colors.length]; |
f474c2a3 | 639 | this.colors_.push(colorStr); |
6a1aa64f DV |
640 | } |
641 | } | |
285a6bda | 642 | |
c21d2c2d | 643 | // TODO(danvk): update this w/r/t/ the new options system. |
285a6bda | 644 | this.renderOptions_.colorScheme = this.colors_; |
fc80a396 DV |
645 | Dygraph.update(this.plotter_.options, this.renderOptions_); |
646 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
647 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
6a1aa64f DV |
648 | } |
649 | ||
43af96e7 NK |
650 | /** |
651 | * Return the list of colors. This is either the list of colors passed in the | |
652 | * attributes, or the autogenerated list of rgb(r,g,b) strings. | |
653 | * @return {Array<string>} The list of colors. | |
654 | */ | |
655 | Dygraph.prototype.getColors = function() { | |
656 | return this.colors_; | |
657 | }; | |
658 | ||
5e60386d DV |
659 | // The following functions are from quirksmode.org with a modification for Safari from |
660 | // http://blog.firetree.net/2005/07/04/javascript-find-position/ | |
3df0ccf0 DV |
661 | // http://www.quirksmode.org/js/findpos.html |
662 | Dygraph.findPosX = function(obj) { | |
663 | var curleft = 0; | |
5e60386d | 664 | if(obj.offsetParent) |
50360fd0 | 665 | while(1) |
5e60386d | 666 | { |
3df0ccf0 | 667 | curleft += obj.offsetLeft; |
5e60386d DV |
668 | if(!obj.offsetParent) |
669 | break; | |
3df0ccf0 DV |
670 | obj = obj.offsetParent; |
671 | } | |
5e60386d | 672 | else if(obj.x) |
3df0ccf0 DV |
673 | curleft += obj.x; |
674 | return curleft; | |
675 | }; | |
c21d2c2d | 676 | |
3df0ccf0 DV |
677 | Dygraph.findPosY = function(obj) { |
678 | var curtop = 0; | |
5e60386d DV |
679 | if(obj.offsetParent) |
680 | while(1) | |
681 | { | |
3df0ccf0 | 682 | curtop += obj.offsetTop; |
5e60386d DV |
683 | if(!obj.offsetParent) |
684 | break; | |
3df0ccf0 DV |
685 | obj = obj.offsetParent; |
686 | } | |
5e60386d | 687 | else if(obj.y) |
3df0ccf0 DV |
688 | curtop += obj.y; |
689 | return curtop; | |
690 | }; | |
691 | ||
5e60386d | 692 | |
71a11a8e | 693 | |
6a1aa64f DV |
694 | /** |
695 | * Create the div that contains information on the selected point(s) | |
696 | * This goes in the top right of the canvas, unless an external div has already | |
697 | * been specified. | |
698 | * @private | |
699 | */ | |
fedbd797 | 700 | Dygraph.prototype.createStatusMessage_ = function() { |
701 | var userLabelsDiv = this.user_attrs_["labelsDiv"]; | |
702 | if (userLabelsDiv && null != userLabelsDiv | |
703 | && (typeof(userLabelsDiv) == "string" || userLabelsDiv instanceof String)) { | |
704 | this.user_attrs_["labelsDiv"] = document.getElementById(userLabelsDiv); | |
705 | } | |
285a6bda DV |
706 | if (!this.attr_("labelsDiv")) { |
707 | var divWidth = this.attr_('labelsDivWidth'); | |
b0c3b730 | 708 | var messagestyle = { |
6a1aa64f DV |
709 | "position": "absolute", |
710 | "fontSize": "14px", | |
711 | "zIndex": 10, | |
712 | "width": divWidth + "px", | |
713 | "top": "0px", | |
8846615a | 714 | "left": (this.width_ - divWidth - 2) + "px", |
6a1aa64f DV |
715 | "background": "white", |
716 | "textAlign": "left", | |
b0c3b730 | 717 | "overflow": "hidden"}; |
fc80a396 | 718 | Dygraph.update(messagestyle, this.attr_('labelsDivStyles')); |
b0c3b730 DV |
719 | var div = document.createElement("div"); |
720 | for (var name in messagestyle) { | |
85b99f0b DV |
721 | if (messagestyle.hasOwnProperty(name)) { |
722 | div.style[name] = messagestyle[name]; | |
723 | } | |
b0c3b730 DV |
724 | } |
725 | this.graphDiv.appendChild(div); | |
285a6bda | 726 | this.attrs_.labelsDiv = div; |
6a1aa64f DV |
727 | } |
728 | }; | |
729 | ||
730 | /** | |
0abfbd7e DV |
731 | * Position the labels div so that its right edge is flush with the right edge |
732 | * of the charting area. | |
733 | */ | |
734 | Dygraph.prototype.positionLabelsDiv_ = function() { | |
735 | // Don't touch a user-specified labelsDiv. | |
736 | if (this.user_attrs_.hasOwnProperty("labelsDiv")) return; | |
737 | ||
738 | var area = this.plotter_.area; | |
739 | var div = this.attr_("labelsDiv"); | |
8c21adcf | 740 | div.style.left = area.x + area.w - this.attr_("labelsDivWidth") - 1 + "px"; |
0abfbd7e DV |
741 | }; |
742 | ||
743 | /** | |
6a1aa64f | 744 | * Create the text box to adjust the averaging period |
6a1aa64f DV |
745 | * @private |
746 | */ | |
285a6bda | 747 | Dygraph.prototype.createRollInterface_ = function() { |
8c69de65 DV |
748 | // Create a roller if one doesn't exist already. |
749 | if (!this.roller_) { | |
750 | this.roller_ = document.createElement("input"); | |
751 | this.roller_.type = "text"; | |
752 | this.roller_.style.display = "none"; | |
753 | this.graphDiv.appendChild(this.roller_); | |
754 | } | |
755 | ||
756 | var display = this.attr_('showRoller') ? 'block' : 'none'; | |
26ca7938 | 757 | |
b0c3b730 DV |
758 | var textAttr = { "position": "absolute", |
759 | "zIndex": 10, | |
760 | "top": (this.plotter_.area.h - 25) + "px", | |
761 | "left": (this.plotter_.area.x + 1) + "px", | |
762 | "display": display | |
6a1aa64f | 763 | }; |
8c69de65 DV |
764 | this.roller_.size = "2"; |
765 | this.roller_.value = this.rollPeriod_; | |
b0c3b730 | 766 | for (var name in textAttr) { |
85b99f0b | 767 | if (textAttr.hasOwnProperty(name)) { |
8c69de65 | 768 | this.roller_.style[name] = textAttr[name]; |
85b99f0b | 769 | } |
b0c3b730 DV |
770 | } |
771 | ||
76171648 | 772 | var dygraph = this; |
8c69de65 | 773 | this.roller_.onchange = function() { dygraph.adjustRoll(dygraph.roller_.value); }; |
76171648 DV |
774 | }; |
775 | ||
776 | // These functions are taken from MochiKit.Signal | |
777 | Dygraph.pageX = function(e) { | |
778 | if (e.pageX) { | |
779 | return (!e.pageX || e.pageX < 0) ? 0 : e.pageX; | |
780 | } else { | |
781 | var de = document; | |
782 | var b = document.body; | |
783 | return e.clientX + | |
784 | (de.scrollLeft || b.scrollLeft) - | |
785 | (de.clientLeft || 0); | |
786 | } | |
787 | }; | |
788 | ||
789 | Dygraph.pageY = function(e) { | |
790 | if (e.pageY) { | |
791 | return (!e.pageY || e.pageY < 0) ? 0 : e.pageY; | |
792 | } else { | |
793 | var de = document; | |
794 | var b = document.body; | |
795 | return e.clientY + | |
796 | (de.scrollTop || b.scrollTop) - | |
797 | (de.clientTop || 0); | |
798 | } | |
799 | }; | |
6a1aa64f | 800 | |
ee672584 RK |
801 | Dygraph.prototype.dragGetX_ = function(e, context) { |
802 | return Dygraph.pageX(e) - context.px | |
803 | }; | |
e3489f4f | 804 | |
ee672584 RK |
805 | Dygraph.prototype.dragGetY_ = function(e, context) { |
806 | return Dygraph.pageY(e) - context.py | |
807 | }; | |
e3489f4f | 808 | |
885c13e4 RK |
809 | // Called in response to an interaction model operation that |
810 | // should start the default panning behavior. | |
811 | // | |
812 | // It's used in the default callback for "mousedown" operations. | |
813 | // Custom interaction model builders can use it to provide the default | |
814 | // panning behavior. | |
815 | // | |
ee672584 RK |
816 | Dygraph.startPan = function(event, g, context) { |
817 | // have to be zoomed in to pan. | |
0a52ab7a RK |
818 | // TODO(konigsberg): Let's loosen this zoom-to-pan restriction, also |
819 | // perhaps create panning boundaries? A more flexible pan would make it, | |
820 | // ahem, 'pan-useful'. | |
ee672584 RK |
821 | var zoomedY = false; |
822 | for (var i = 0; i < g.axes_.length; i++) { | |
823 | if (g.axes_[i].valueWindow || g.axes_[i].valueRange) { | |
824 | zoomedY = true; | |
825 | break; | |
826 | } | |
827 | } | |
828 | if (!g.dateWindow_ && !zoomedY) return; | |
829 | ||
830 | context.isPanning = true; | |
831 | var xRange = g.xAxisRange(); | |
832 | context.dateRange = xRange[1] - xRange[0]; | |
833 | ||
834 | // Record the range of each y-axis at the start of the drag. | |
835 | // If any axis has a valueRange or valueWindow, then we want a 2D pan. | |
836 | context.is2DPan = false; | |
837 | for (var i = 0; i < g.axes_.length; i++) { | |
838 | var axis = g.axes_[i]; | |
839 | var yRange = g.yAxisRange(i); | |
840 | axis.dragValueRange = yRange[1] - yRange[0]; | |
841 | var r = g.toDataCoords(null, context.dragStartY, i); | |
842 | axis.draggingValue = r[1]; | |
843 | if (axis.valueWindow || axis.valueRange) context.is2DPan = true; | |
844 | } | |
6a1aa64f | 845 | |
ee672584 RK |
846 | // TODO(konigsberg): Switch from all this math to toDataCoords? |
847 | // Seems to work for the dragging value. | |
848 | context.draggingDate = (context.dragStartX / g.width_) * context.dateRange + xRange[0]; | |
849 | }; | |
6a1aa64f | 850 | |
885c13e4 RK |
851 | // Called in response to an interaction model operation that |
852 | // responds to an event that pans the view. | |
853 | // | |
854 | // It's used in the default callback for "mousemove" operations. | |
855 | // Custom interaction model builders can use it to provide the default | |
856 | // panning behavior. | |
857 | // | |
ee672584 RK |
858 | Dygraph.movePan = function(event, g, context) { |
859 | context.dragEndX = g.dragGetX_(event, context); | |
860 | context.dragEndY = g.dragGetY_(event, context); | |
bce01b0f | 861 | |
d58ae307 | 862 | // TODO(danvk): update this comment |
ee672584 RK |
863 | // Want to have it so that: |
864 | // 1. draggingDate appears at dragEndX, draggingValue appears at dragEndY. | |
865 | // 2. daterange = (dateWindow_[1] - dateWindow_[0]) is unaltered. | |
866 | // 3. draggingValue appears at dragEndY. | |
867 | // 4. valueRange is unaltered. | |
868 | ||
869 | var minDate = context.draggingDate - (context.dragEndX / g.width_) * context.dateRange; | |
870 | var maxDate = minDate + context.dateRange; | |
871 | g.dateWindow_ = [minDate, maxDate]; | |
872 | ||
873 | // y-axis scaling is automatic unless this is a full 2D pan. | |
874 | if (context.is2DPan) { | |
875 | // Adjust each axis appropriately. | |
876 | var y_frac = context.dragEndY / g.height_; | |
877 | for (var i = 0; i < g.axes_.length; i++) { | |
878 | var axis = g.axes_[i]; | |
879 | var maxValue = axis.draggingValue + y_frac * axis.dragValueRange; | |
880 | var minValue = maxValue - axis.dragValueRange; | |
881 | axis.valueWindow = [ minValue, maxValue ]; | |
6a1aa64f | 882 | } |
ee672584 | 883 | } |
6a1aa64f | 884 | |
ee672584 RK |
885 | g.drawGraph_(); |
886 | } | |
79b3ee42 | 887 | |
885c13e4 RK |
888 | // Called in response to an interaction model operation that |
889 | // responds to an event that ends panning. | |
890 | // | |
891 | // It's used in the default callback for "mouseup" operations. | |
892 | // Custom interaction model builders can use it to provide the default | |
893 | // panning behavior. | |
894 | // | |
ee672584 RK |
895 | Dygraph.endPan = function(event, g, context) { |
896 | context.isPanning = false; | |
897 | context.is2DPan = false; | |
898 | context.draggingDate = null; | |
899 | context.dateRange = null; | |
900 | context.valueRange = null; | |
901 | } | |
bce01b0f | 902 | |
885c13e4 RK |
903 | // Called in response to an interaction model operation that |
904 | // responds to an event that starts zooming. | |
905 | // | |
906 | // It's used in the default callback for "mousedown" operations. | |
907 | // Custom interaction model builders can use it to provide the default | |
908 | // zooming behavior. | |
909 | // | |
ee672584 RK |
910 | Dygraph.startZoom = function(event, g, context) { |
911 | context.isZooming = true; | |
912 | } | |
913 | ||
885c13e4 RK |
914 | // Called in response to an interaction model operation that |
915 | // responds to an event that defines zoom boundaries. | |
916 | // | |
917 | // It's used in the default callback for "mousemove" operations. | |
918 | // Custom interaction model builders can use it to provide the default | |
919 | // zooming behavior. | |
920 | // | |
ee672584 RK |
921 | Dygraph.moveZoom = function(event, g, context) { |
922 | context.dragEndX = g.dragGetX_(event, context); | |
923 | context.dragEndY = g.dragGetY_(event, context); | |
924 | ||
925 | var xDelta = Math.abs(context.dragStartX - context.dragEndX); | |
926 | var yDelta = Math.abs(context.dragStartY - context.dragEndY); | |
927 | ||
928 | // drag direction threshold for y axis is twice as large as x axis | |
929 | context.dragDirection = (xDelta < yDelta / 2) ? Dygraph.VERTICAL : Dygraph.HORIZONTAL; | |
930 | ||
931 | g.drawZoomRect_( | |
932 | context.dragDirection, | |
933 | context.dragStartX, | |
934 | context.dragEndX, | |
935 | context.dragStartY, | |
936 | context.dragEndY, | |
937 | context.prevDragDirection, | |
938 | context.prevEndX, | |
939 | context.prevEndY); | |
940 | ||
941 | context.prevEndX = context.dragEndX; | |
942 | context.prevEndY = context.dragEndY; | |
943 | context.prevDragDirection = context.dragDirection; | |
944 | } | |
945 | ||
885c13e4 RK |
946 | // Called in response to an interaction model operation that |
947 | // responds to an event that performs a zoom based on previously defined | |
948 | // bounds.. | |
949 | // | |
950 | // It's used in the default callback for "mouseup" operations. | |
951 | // Custom interaction model builders can use it to provide the default | |
952 | // zooming behavior. | |
953 | // | |
ee672584 RK |
954 | Dygraph.endZoom = function(event, g, context) { |
955 | context.isZooming = false; | |
956 | context.dragEndX = g.dragGetX_(event, context); | |
957 | context.dragEndY = g.dragGetY_(event, context); | |
958 | var regionWidth = Math.abs(context.dragEndX - context.dragStartX); | |
959 | var regionHeight = Math.abs(context.dragEndY - context.dragStartY); | |
960 | ||
961 | if (regionWidth < 2 && regionHeight < 2 && | |
962 | g.lastx_ != undefined && g.lastx_ != -1) { | |
963 | // TODO(danvk): pass along more info about the points, e.g. 'x' | |
964 | if (g.attr_('clickCallback') != null) { | |
965 | g.attr_('clickCallback')(event, g.lastx_, g.selPoints_); | |
966 | } | |
967 | if (g.attr_('pointClickCallback')) { | |
968 | // check if the click was on a particular point. | |
969 | var closestIdx = -1; | |
970 | var closestDistance = 0; | |
971 | for (var i = 0; i < g.selPoints_.length; i++) { | |
972 | var p = g.selPoints_[i]; | |
973 | var distance = Math.pow(p.canvasx - context.dragEndX, 2) + | |
974 | Math.pow(p.canvasy - context.dragEndY, 2); | |
975 | if (closestIdx == -1 || distance < closestDistance) { | |
976 | closestDistance = distance; | |
977 | closestIdx = i; | |
d58ae307 DV |
978 | } |
979 | } | |
d58ae307 | 980 | |
ee672584 RK |
981 | // Allow any click within two pixels of the dot. |
982 | var radius = g.attr_('highlightCircleSize') + 2; | |
983 | if (closestDistance <= 5 * 5) { | |
984 | g.attr_('pointClickCallback')(event, g.selPoints_[closestIdx]); | |
d58ae307 | 985 | } |
6a1aa64f | 986 | } |
ee672584 | 987 | } |
e3489f4f | 988 | |
ee672584 RK |
989 | if (regionWidth >= 10 && context.dragDirection == Dygraph.HORIZONTAL) { |
990 | g.doZoomX_(Math.min(context.dragStartX, context.dragEndX), | |
991 | Math.max(context.dragStartX, context.dragEndX)); | |
992 | } else if (regionHeight >= 10 && context.dragDirection == Dygraph.VERTICAL) { | |
993 | g.doZoomY_(Math.min(context.dragStartY, context.dragEndY), | |
994 | Math.max(context.dragStartY, context.dragEndY)); | |
995 | } else { | |
996 | g.canvas_.getContext("2d").clearRect(0, 0, | |
997 | g.canvas_.width, | |
998 | g.canvas_.height); | |
999 | } | |
1000 | context.dragStartX = null; | |
1001 | context.dragStartY = null; | |
1002 | } | |
79b3ee42 | 1003 | |
0a52ab7a RK |
1004 | Dygraph.defaultInteractionModel = { |
1005 | // Track the beginning of drag events | |
4f0c5aa0 DV |
1006 | mousedown: function(event, g, context) { |
1007 | context.initializeMouseDown(event, g, context); | |
0a52ab7a | 1008 | |
4f0c5aa0 DV |
1009 | if (event.altKey || event.shiftKey) { |
1010 | Dygraph.startPan(event, g, context); | |
bce01b0f | 1011 | } else { |
4f0c5aa0 | 1012 | Dygraph.startZoom(event, g, context); |
bce01b0f | 1013 | } |
4f0c5aa0 | 1014 | }, |
6a1aa64f | 1015 | |
0a52ab7a | 1016 | // Draw zoom rectangles when the mouse is down and the user moves around |
4f0c5aa0 DV |
1017 | mousemove: function(event, g, context) { |
1018 | if (context.isZooming) { | |
1019 | Dygraph.moveZoom(event, g, context); | |
1020 | } else if (context.isPanning) { | |
1021 | Dygraph.movePan(event, g, context); | |
6a1aa64f | 1022 | } |
4f0c5aa0 | 1023 | }, |
bce01b0f | 1024 | |
4f0c5aa0 DV |
1025 | mouseup: function(event, g, context) { |
1026 | if (context.isZooming) { | |
1027 | Dygraph.endZoom(event, g, context); | |
1028 | } else if (context.isPanning) { | |
1029 | Dygraph.endPan(event, g, context); | |
bce01b0f | 1030 | } |
4f0c5aa0 | 1031 | }, |
6a1aa64f DV |
1032 | |
1033 | // Temporarily cancel the dragging event when the mouse leaves the graph | |
4f0c5aa0 DV |
1034 | mouseout: function(event, g, context) { |
1035 | if (context.isZooming) { | |
1036 | context.dragEndX = null; | |
1037 | context.dragEndY = null; | |
6a1aa64f | 1038 | } |
4f0c5aa0 | 1039 | }, |
6a1aa64f | 1040 | |
0a52ab7a | 1041 | // Disable zooming out if panning. |
4f0c5aa0 DV |
1042 | dblclick: function(event, g, context) { |
1043 | if (event.altKey || event.shiftKey) { | |
1044 | return; | |
0a52ab7a | 1045 | } |
4f0c5aa0 DV |
1046 | // TODO(konigsberg): replace g.doUnzoom()_ with something that is |
1047 | // friendlier to public use. | |
1048 | g.doUnzoom_(); | |
1049 | } | |
0a52ab7a | 1050 | }; |
1e1bf7df | 1051 | |
0a52ab7a | 1052 | Dygraph.DEFAULT_ATTRS.interactionModel = Dygraph.defaultInteractionModel; |
6a1aa64f | 1053 | |
ee672584 RK |
1054 | /** |
1055 | * Set up all the mouse handlers needed to capture dragging behavior for zoom | |
1056 | * events. | |
1057 | * @private | |
1058 | */ | |
1059 | Dygraph.prototype.createDragInterface_ = function() { | |
1060 | var context = { | |
1061 | // Tracks whether the mouse is down right now | |
4f0c5aa0 DV |
1062 | isZooming: false, |
1063 | isPanning: false, // is this drag part of a pan? | |
1064 | is2DPan: false, // if so, is that pan 1- or 2-dimensional? | |
1065 | dragStartX: null, | |
1066 | dragStartY: null, | |
1067 | dragEndX: null, | |
1068 | dragEndY: null, | |
1069 | dragDirection: null, | |
1070 | prevEndX: null, | |
1071 | prevEndY: null, | |
1072 | prevDragDirection: null, | |
ee672584 RK |
1073 | |
1074 | // TODO(danvk): update this comment | |
1075 | // draggingDate and draggingValue represent the [date,value] point on the | |
1076 | // graph at which the mouse was pressed. As the mouse moves while panning, | |
1077 | // the viewport must pan so that the mouse position points to | |
1078 | // [draggingDate, draggingValue] | |
4f0c5aa0 | 1079 | draggingDate: null, |
ee672584 RK |
1080 | |
1081 | // TODO(danvk): update this comment | |
1082 | // The range in second/value units that the viewport encompasses during a | |
1083 | // panning operation. | |
4f0c5aa0 | 1084 | dateRange: null, |
ee672584 RK |
1085 | |
1086 | // Utility function to convert page-wide coordinates to canvas coords | |
4f0c5aa0 DV |
1087 | px: 0, |
1088 | py: 0, | |
ee672584 | 1089 | |
4f0c5aa0 | 1090 | initializeMouseDown: function(event, g, context) { |
885c13e4 | 1091 | // prevents mouse drags from selecting page text. |
ee672584 RK |
1092 | if (event.preventDefault) { |
1093 | event.preventDefault(); // Firefox, Chrome, etc. | |
6a1aa64f | 1094 | } else { |
ee672584 | 1095 | event.returnValue = false; // IE |
4f0c5aa0 | 1096 | event.cancelBubble = true; |
6a1aa64f DV |
1097 | } |
1098 | ||
ee672584 RK |
1099 | context.px = Dygraph.findPosX(g.canvas_); |
1100 | context.py = Dygraph.findPosY(g.canvas_); | |
1101 | context.dragStartX = g.dragGetX_(event, context); | |
1102 | context.dragStartY = g.dragGetY_(event, context); | |
6a1aa64f | 1103 | } |
ee672584 | 1104 | }; |
bce01b0f | 1105 | |
885c13e4 RK |
1106 | var interactionModel = this.attr_("interactionModel"); |
1107 | ||
2b188b3d RK |
1108 | // Self is the graph. |
1109 | var self = this; | |
1110 | ||
1111 | // Function that binds the graph and context to the handler. | |
1112 | var bindHandler = function(handler) { | |
ee672584 | 1113 | return function(event) { |
2b188b3d | 1114 | handler(event, self, context); |
ee672584 RK |
1115 | }; |
1116 | }; | |
1117 | ||
885c13e4 RK |
1118 | for (var eventName in interactionModel) { |
1119 | if (!interactionModel.hasOwnProperty(eventName)) continue; | |
ee672584 | 1120 | Dygraph.addEvent(this.mouseEventElement_, eventName, |
2b188b3d | 1121 | bindHandler(interactionModel[eventName])); |
ee672584 | 1122 | } |
6a1aa64f | 1123 | |
6a1aa64f DV |
1124 | // If the user releases the mouse button during a drag, but not over the |
1125 | // canvas, then it doesn't count as a zooming action. | |
76171648 | 1126 | Dygraph.addEvent(document, 'mouseup', function(event) { |
ee672584 RK |
1127 | if (context.isZooming || context.isPanning) { |
1128 | context.isZooming = false; | |
1129 | context.dragStartX = null; | |
1130 | context.dragStartY = null; | |
6a1aa64f | 1131 | } |
8b83c6cc | 1132 | |
ee672584 RK |
1133 | if (context.isPanning) { |
1134 | context.isPanning = false; | |
1135 | context.draggingDate = null; | |
1136 | context.dateRange = null; | |
d58ae307 | 1137 | for (var i = 0; i < self.axes_.length; i++) { |
d63e6799 DV |
1138 | delete self.axes_[i].draggingValue; |
1139 | delete self.axes_[i].dragValueRange; | |
d58ae307 | 1140 | } |
bce01b0f | 1141 | } |
6a1aa64f DV |
1142 | }); |
1143 | }; | |
1144 | ||
1145 | /** | |
1146 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
1147 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
1148 | * avoid extra redrawing, but it's tricky to avoid interactions with the status | |
1149 | * dots. | |
8b83c6cc | 1150 | * |
39b0e098 RK |
1151 | * @param {Number} direction the direction of the zoom rectangle. Acceptable |
1152 | * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL. | |
6a1aa64f DV |
1153 | * @param {Number} startX The X position where the drag started, in canvas |
1154 | * coordinates. | |
1155 | * @param {Number} endX The current X position of the drag, in canvas coords. | |
8b83c6cc RK |
1156 | * @param {Number} startY The Y position where the drag started, in canvas |
1157 | * coordinates. | |
1158 | * @param {Number} endY The current Y position of the drag, in canvas coords. | |
39b0e098 | 1159 | * @param {Number} prevDirection the value of direction on the previous call to |
8b83c6cc | 1160 | * this function. Used to avoid excess redrawing |
6a1aa64f DV |
1161 | * @param {Number} prevEndX The value of endX on the previous call to this |
1162 | * function. Used to avoid excess redrawing | |
8b83c6cc RK |
1163 | * @param {Number} prevEndY The value of endY on the previous call to this |
1164 | * function. Used to avoid excess redrawing | |
6a1aa64f DV |
1165 | * @private |
1166 | */ | |
8b83c6cc RK |
1167 | Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY, endY, |
1168 | prevDirection, prevEndX, prevEndY) { | |
6a1aa64f DV |
1169 | var ctx = this.canvas_.getContext("2d"); |
1170 | ||
1171 | // Clean up from the previous rect if necessary | |
39b0e098 | 1172 | if (prevDirection == Dygraph.HORIZONTAL) { |
6a1aa64f DV |
1173 | ctx.clearRect(Math.min(startX, prevEndX), 0, |
1174 | Math.abs(startX - prevEndX), this.height_); | |
39b0e098 | 1175 | } else if (prevDirection == Dygraph.VERTICAL){ |
8b83c6cc RK |
1176 | ctx.clearRect(0, Math.min(startY, prevEndY), |
1177 | this.width_, Math.abs(startY - prevEndY)); | |
6a1aa64f DV |
1178 | } |
1179 | ||
1180 | // Draw a light-grey rectangle to show the new viewing area | |
39b0e098 | 1181 | if (direction == Dygraph.HORIZONTAL) { |
8b83c6cc RK |
1182 | if (endX && startX) { |
1183 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
1184 | ctx.fillRect(Math.min(startX, endX), 0, | |
1185 | Math.abs(endX - startX), this.height_); | |
1186 | } | |
1187 | } | |
39b0e098 | 1188 | if (direction == Dygraph.VERTICAL) { |
8b83c6cc RK |
1189 | if (endY && startY) { |
1190 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
1191 | ctx.fillRect(0, Math.min(startY, endY), | |
1192 | this.width_, Math.abs(endY - startY)); | |
1193 | } | |
6a1aa64f DV |
1194 | } |
1195 | }; | |
1196 | ||
1197 | /** | |
8b83c6cc RK |
1198 | * Zoom to something containing [lowX, highX]. These are pixel coordinates in |
1199 | * the canvas. The exact zoom window may be slightly larger if there are no data | |
1200 | * points near lowX or highX. Don't confuse this function with doZoomXDates, | |
1201 | * which accepts dates that match the raw data. This function redraws the graph. | |
d58ae307 | 1202 | * |
6a1aa64f DV |
1203 | * @param {Number} lowX The leftmost pixel value that should be visible. |
1204 | * @param {Number} highX The rightmost pixel value that should be visible. | |
1205 | * @private | |
1206 | */ | |
8b83c6cc | 1207 | Dygraph.prototype.doZoomX_ = function(lowX, highX) { |
6a1aa64f | 1208 | // Find the earliest and latest dates contained in this canvasx range. |
8b83c6cc | 1209 | // Convert the call to date ranges of the raw data. |
56623f3b DV |
1210 | var r = this.toDataCoords(lowX, null); |
1211 | var minDate = r[0]; | |
1212 | r = this.toDataCoords(highX, null); | |
1213 | var maxDate = r[0]; | |
8b83c6cc RK |
1214 | this.doZoomXDates_(minDate, maxDate); |
1215 | }; | |
6a1aa64f | 1216 | |
8b83c6cc RK |
1217 | /** |
1218 | * Zoom to something containing [minDate, maxDate] values. Don't confuse this | |
1219 | * method with doZoomX which accepts pixel coordinates. This function redraws | |
1220 | * the graph. | |
d58ae307 | 1221 | * |
8b83c6cc RK |
1222 | * @param {Number} minDate The minimum date that should be visible. |
1223 | * @param {Number} maxDate The maximum date that should be visible. | |
1224 | * @private | |
1225 | */ | |
1226 | Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) { | |
6a1aa64f | 1227 | this.dateWindow_ = [minDate, maxDate]; |
26ca7938 | 1228 | this.drawGraph_(); |
285a6bda | 1229 | if (this.attr_("zoomCallback")) { |
ac139d19 | 1230 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); |
8b83c6cc RK |
1231 | } |
1232 | }; | |
1233 | ||
1234 | /** | |
1235 | * Zoom to something containing [lowY, highY]. These are pixel coordinates in | |
d58ae307 DV |
1236 | * the canvas. This function redraws the graph. |
1237 | * | |
8b83c6cc RK |
1238 | * @param {Number} lowY The topmost pixel value that should be visible. |
1239 | * @param {Number} highY The lowest pixel value that should be visible. | |
1240 | * @private | |
1241 | */ | |
1242 | Dygraph.prototype.doZoomY_ = function(lowY, highY) { | |
d58ae307 DV |
1243 | // Find the highest and lowest values in pixel range for each axis. |
1244 | // Note that lowY (in pixels) corresponds to the max Value (in data coords). | |
1245 | // This is because pixels increase as you go down on the screen, whereas data | |
1246 | // coordinates increase as you go up the screen. | |
1247 | var valueRanges = []; | |
1248 | for (var i = 0; i < this.axes_.length; i++) { | |
1249 | var hi = this.toDataCoords(null, lowY, i); | |
1250 | var low = this.toDataCoords(null, highY, i); | |
1251 | this.axes_[i].valueWindow = [low[1], hi[1]]; | |
1252 | valueRanges.push([low[1], hi[1]]); | |
1253 | } | |
8b83c6cc | 1254 | |
66c380c4 | 1255 | this.drawGraph_(); |
8b83c6cc | 1256 | if (this.attr_("zoomCallback")) { |
d58ae307 DV |
1257 | var xRange = this.xAxisRange(); |
1258 | this.attr_("zoomCallback")(xRange[0], xRange[1], this.yAxisRanges()); | |
8b83c6cc RK |
1259 | } |
1260 | }; | |
1261 | ||
1262 | /** | |
1263 | * Reset the zoom to the original view coordinates. This is the same as | |
1264 | * double-clicking on the graph. | |
d58ae307 | 1265 | * |
8b83c6cc RK |
1266 | * @private |
1267 | */ | |
1268 | Dygraph.prototype.doUnzoom_ = function() { | |
d58ae307 | 1269 | var dirty = false; |
8b83c6cc | 1270 | if (this.dateWindow_ != null) { |
d58ae307 | 1271 | dirty = true; |
8b83c6cc RK |
1272 | this.dateWindow_ = null; |
1273 | } | |
d58ae307 DV |
1274 | |
1275 | for (var i = 0; i < this.axes_.length; i++) { | |
1276 | if (this.axes_[i].valueWindow != null) { | |
1277 | dirty = true; | |
1278 | delete this.axes_[i].valueWindow; | |
1279 | } | |
8b83c6cc RK |
1280 | } |
1281 | ||
1282 | if (dirty) { | |
437c0979 RK |
1283 | // Putting the drawing operation before the callback because it resets |
1284 | // yAxisRange. | |
66c380c4 | 1285 | this.drawGraph_(); |
8b83c6cc RK |
1286 | if (this.attr_("zoomCallback")) { |
1287 | var minDate = this.rawData_[0][0]; | |
1288 | var maxDate = this.rawData_[this.rawData_.length - 1][0]; | |
d58ae307 | 1289 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); |
8b83c6cc | 1290 | } |
67e650dc | 1291 | } |
6a1aa64f DV |
1292 | }; |
1293 | ||
1294 | /** | |
1295 | * When the mouse moves in the canvas, display information about a nearby data | |
1296 | * point and draw dots over those points in the data series. This function | |
1297 | * takes care of cleanup of previously-drawn dots. | |
1298 | * @param {Object} event The mousemove event from the browser. | |
1299 | * @private | |
1300 | */ | |
285a6bda | 1301 | Dygraph.prototype.mouseMove_ = function(event) { |
eb7bf005 | 1302 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_); |
6a1aa64f DV |
1303 | var points = this.layout_.points; |
1304 | ||
1305 | var lastx = -1; | |
1306 | var lasty = -1; | |
1307 | ||
1308 | // Loop through all the points and find the date nearest to our current | |
1309 | // location. | |
1310 | var minDist = 1e+100; | |
1311 | var idx = -1; | |
1312 | for (var i = 0; i < points.length; i++) { | |
8a7cc60e RK |
1313 | var point = points[i]; |
1314 | if (point == null) continue; | |
ee672584 | 1315 | var dist = Math.abs(point.canvasx - canvasx); |
f032c51d | 1316 | if (dist > minDist) continue; |
6a1aa64f DV |
1317 | minDist = dist; |
1318 | idx = i; | |
1319 | } | |
1320 | if (idx >= 0) lastx = points[idx].xval; | |
1321 | // Check that you can really highlight the last day's data | |
8a7cc60e RK |
1322 | var last = points[points.length-1]; |
1323 | if (last != null && canvasx > last.canvasx) | |
6a1aa64f DV |
1324 | lastx = points[points.length-1].xval; |
1325 | ||
1326 | // Extract the points we've selected | |
b258a3da | 1327 | this.selPoints_ = []; |
50360fd0 | 1328 | var l = points.length; |
416b05ad NK |
1329 | if (!this.attr_("stackedGraph")) { |
1330 | for (var i = 0; i < l; i++) { | |
1331 | if (points[i].xval == lastx) { | |
1332 | this.selPoints_.push(points[i]); | |
1333 | } | |
1334 | } | |
1335 | } else { | |
354e15ab DE |
1336 | // Need to 'unstack' points starting from the bottom |
1337 | var cumulative_sum = 0; | |
416b05ad NK |
1338 | for (var i = l - 1; i >= 0; i--) { |
1339 | if (points[i].xval == lastx) { | |
354e15ab | 1340 | var p = {}; // Clone the point since we modify it |
d4139cd8 NK |
1341 | for (var k in points[i]) { |
1342 | p[k] = points[i][k]; | |
50360fd0 NK |
1343 | } |
1344 | p.yval -= cumulative_sum; | |
1345 | cumulative_sum += p.yval; | |
d4139cd8 | 1346 | this.selPoints_.push(p); |
12e4c741 | 1347 | } |
6a1aa64f | 1348 | } |
354e15ab | 1349 | this.selPoints_.reverse(); |
6a1aa64f DV |
1350 | } |
1351 | ||
b258a3da | 1352 | if (this.attr_("highlightCallback")) { |
a4c6a67c | 1353 | var px = this.lastx_; |
dd082dda | 1354 | if (px !== null && lastx != px) { |
344ba8c0 | 1355 | // only fire if the selected point has changed. |
2ddb1197 | 1356 | this.attr_("highlightCallback")(event, lastx, this.selPoints_, this.idxToRow_(idx)); |
43af96e7 | 1357 | } |
12e4c741 | 1358 | } |
43af96e7 | 1359 | |
239c712d NAG |
1360 | // Save last x position for callbacks. |
1361 | this.lastx_ = lastx; | |
50360fd0 | 1362 | |
239c712d NAG |
1363 | this.updateSelection_(); |
1364 | }; | |
b258a3da | 1365 | |
239c712d | 1366 | /** |
1903f1e4 | 1367 | * Transforms layout_.points index into data row number. |
2ddb1197 | 1368 | * @param int layout_.points index |
1903f1e4 | 1369 | * @return int row number, or -1 if none could be found. |
2ddb1197 SC |
1370 | * @private |
1371 | */ | |
1372 | Dygraph.prototype.idxToRow_ = function(idx) { | |
1903f1e4 | 1373 | if (idx < 0) return -1; |
2ddb1197 | 1374 | |
1903f1e4 DV |
1375 | for (var i in this.layout_.datasets) { |
1376 | if (idx < this.layout_.datasets[i].length) { | |
1377 | return this.boundaryIds_[0][0]+idx; | |
1378 | } | |
1379 | idx -= this.layout_.datasets[i].length; | |
1380 | } | |
1381 | return -1; | |
1382 | }; | |
2ddb1197 SC |
1383 | |
1384 | /** | |
239c712d NAG |
1385 | * Draw dots over the selectied points in the data series. This function |
1386 | * takes care of cleanup of previously-drawn dots. | |
1387 | * @private | |
1388 | */ | |
1389 | Dygraph.prototype.updateSelection_ = function() { | |
6a1aa64f | 1390 | // Clear the previously drawn vertical, if there is one |
6a1aa64f DV |
1391 | var ctx = this.canvas_.getContext("2d"); |
1392 | if (this.previousVerticalX_ >= 0) { | |
46dde5f9 DV |
1393 | // Determine the maximum highlight circle size. |
1394 | var maxCircleSize = 0; | |
227b93cc DV |
1395 | var labels = this.attr_('labels'); |
1396 | for (var i = 1; i < labels.length; i++) { | |
1397 | var r = this.attr_('highlightCircleSize', labels[i]); | |
46dde5f9 DV |
1398 | if (r > maxCircleSize) maxCircleSize = r; |
1399 | } | |
6a1aa64f | 1400 | var px = this.previousVerticalX_; |
46dde5f9 DV |
1401 | ctx.clearRect(px - maxCircleSize - 1, 0, |
1402 | 2 * maxCircleSize + 2, this.height_); | |
6a1aa64f DV |
1403 | } |
1404 | ||
584ceeaa DV |
1405 | var isOK = function(x) { return x && !isNaN(x); }; |
1406 | ||
d160cc3b | 1407 | if (this.selPoints_.length > 0) { |
b258a3da | 1408 | var canvasx = this.selPoints_[0].canvasx; |
6a1aa64f DV |
1409 | |
1410 | // Set the status message to indicate the selected point(s) | |
6be8e54c JB |
1411 | var replace = this.attr_('xValueFormatter')( |
1412 | this.lastx_, this.numXDigits_ + this.numExtraDigits_) + ":"; | |
50360fd0 | 1413 | var fmtFunc = this.attr_('yValueFormatter'); |
6a1aa64f | 1414 | var clen = this.colors_.length; |
d160cc3b NK |
1415 | |
1416 | if (this.attr_('showLabelsOnHighlight')) { | |
1417 | // Set the status message to indicate the selected point(s) | |
d160cc3b | 1418 | for (var i = 0; i < this.selPoints_.length; i++) { |
129569a5 | 1419 | if (!this.attr_("labelsShowZeroValues") && this.selPoints_[i].yval == 0) continue; |
d160cc3b NK |
1420 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
1421 | if (this.attr_("labelsSeparateLines")) { | |
1422 | replace += "<br/>"; | |
1423 | } | |
1424 | var point = this.selPoints_[i]; | |
8fb6dc24 | 1425 | var c = new RGBColor(this.plotter_.colors[point.name]); |
6be8e54c | 1426 | var yval = fmtFunc(point.yval, this.numYDigits_ + this.numExtraDigits_); |
d160cc3b NK |
1427 | replace += " <b><font color='" + c.toHex() + "'>" |
1428 | + point.name + "</font></b>:" | |
1429 | + yval; | |
6a1aa64f | 1430 | } |
50360fd0 | 1431 | |
d160cc3b | 1432 | this.attr_("labelsDiv").innerHTML = replace; |
6a1aa64f | 1433 | } |
6a1aa64f | 1434 | |
6a1aa64f | 1435 | // Draw colored circles over the center of each selected point |
43af96e7 | 1436 | ctx.save(); |
b258a3da | 1437 | for (var i = 0; i < this.selPoints_.length; i++) { |
f032c51d | 1438 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
227b93cc DV |
1439 | var circleSize = |
1440 | this.attr_('highlightCircleSize', this.selPoints_[i].name); | |
6a1aa64f | 1441 | ctx.beginPath(); |
563c70ca | 1442 | ctx.fillStyle = this.plotter_.colors[this.selPoints_[i].name]; |
f032c51d | 1443 | ctx.arc(canvasx, this.selPoints_[i].canvasy, circleSize, |
7bf6a9fe | 1444 | 0, 2 * Math.PI, false); |
6a1aa64f DV |
1445 | ctx.fill(); |
1446 | } | |
1447 | ctx.restore(); | |
1448 | ||
1449 | this.previousVerticalX_ = canvasx; | |
1450 | } | |
1451 | }; | |
1452 | ||
1453 | /** | |
239c712d NAG |
1454 | * Set manually set selected dots, and display information about them |
1455 | * @param int row number that should by highlighted | |
1456 | * false value clears the selection | |
1457 | * @public | |
1458 | */ | |
1459 | Dygraph.prototype.setSelection = function(row) { | |
1460 | // Extract the points we've selected | |
1461 | this.selPoints_ = []; | |
1462 | var pos = 0; | |
50360fd0 | 1463 | |
239c712d | 1464 | if (row !== false) { |
16269f6e NAG |
1465 | row = row-this.boundaryIds_[0][0]; |
1466 | } | |
50360fd0 | 1467 | |
16269f6e | 1468 | if (row !== false && row >= 0) { |
239c712d | 1469 | for (var i in this.layout_.datasets) { |
16269f6e | 1470 | if (row < this.layout_.datasets[i].length) { |
38f33a44 | 1471 | var point = this.layout_.points[pos+row]; |
1472 | ||
1473 | if (this.attr_("stackedGraph")) { | |
8c03ba63 | 1474 | point = this.layout_.unstackPointAtIndex(pos+row); |
38f33a44 | 1475 | } |
1476 | ||
1477 | this.selPoints_.push(point); | |
16269f6e | 1478 | } |
239c712d NAG |
1479 | pos += this.layout_.datasets[i].length; |
1480 | } | |
16269f6e | 1481 | } |
50360fd0 | 1482 | |
16269f6e | 1483 | if (this.selPoints_.length) { |
239c712d NAG |
1484 | this.lastx_ = this.selPoints_[0].xval; |
1485 | this.updateSelection_(); | |
1486 | } else { | |
1487 | this.lastx_ = -1; | |
1488 | this.clearSelection(); | |
1489 | } | |
1490 | ||
1491 | }; | |
1492 | ||
1493 | /** | |
6a1aa64f DV |
1494 | * The mouse has left the canvas. Clear out whatever artifacts remain |
1495 | * @param {Object} event the mouseout event from the browser. | |
1496 | * @private | |
1497 | */ | |
285a6bda | 1498 | Dygraph.prototype.mouseOut_ = function(event) { |
a4c6a67c AV |
1499 | if (this.attr_("unhighlightCallback")) { |
1500 | this.attr_("unhighlightCallback")(event); | |
1501 | } | |
1502 | ||
43af96e7 | 1503 | if (this.attr_("hideOverlayOnMouseOut")) { |
239c712d | 1504 | this.clearSelection(); |
43af96e7 | 1505 | } |
6a1aa64f DV |
1506 | }; |
1507 | ||
239c712d NAG |
1508 | /** |
1509 | * Remove all selection from the canvas | |
1510 | * @public | |
1511 | */ | |
1512 | Dygraph.prototype.clearSelection = function() { | |
1513 | // Get rid of the overlay data | |
1514 | var ctx = this.canvas_.getContext("2d"); | |
1515 | ctx.clearRect(0, 0, this.width_, this.height_); | |
1516 | this.attr_("labelsDiv").innerHTML = ""; | |
1517 | this.selPoints_ = []; | |
1518 | this.lastx_ = -1; | |
1519 | } | |
1520 | ||
103b7292 NAG |
1521 | /** |
1522 | * Returns the number of the currently selected row | |
1523 | * @return int row number, of -1 if nothing is selected | |
1524 | * @public | |
1525 | */ | |
1526 | Dygraph.prototype.getSelection = function() { | |
1527 | if (!this.selPoints_ || this.selPoints_.length < 1) { | |
1528 | return -1; | |
1529 | } | |
50360fd0 | 1530 | |
103b7292 NAG |
1531 | for (var row=0; row<this.layout_.points.length; row++ ) { |
1532 | if (this.layout_.points[row].x == this.selPoints_[0].x) { | |
16269f6e | 1533 | return row + this.boundaryIds_[0][0]; |
103b7292 NAG |
1534 | } |
1535 | } | |
1536 | return -1; | |
1537 | } | |
1538 | ||
285a6bda | 1539 | Dygraph.zeropad = function(x) { |
32988383 DV |
1540 | if (x < 10) return "0" + x; else return "" + x; |
1541 | } | |
1542 | ||
6a1aa64f | 1543 | /** |
6b8e33dd DV |
1544 | * Return a string version of the hours, minutes and seconds portion of a date. |
1545 | * @param {Number} date The JavaScript date (ms since epoch) | |
1546 | * @return {String} A time of the form "HH:MM:SS" | |
1547 | * @private | |
1548 | */ | |
bf640e56 | 1549 | Dygraph.hmsString_ = function(date) { |
285a6bda | 1550 | var zeropad = Dygraph.zeropad; |
6b8e33dd DV |
1551 | var d = new Date(date); |
1552 | if (d.getSeconds()) { | |
1553 | return zeropad(d.getHours()) + ":" + | |
1554 | zeropad(d.getMinutes()) + ":" + | |
1555 | zeropad(d.getSeconds()); | |
6b8e33dd | 1556 | } else { |
054531ca | 1557 | return zeropad(d.getHours()) + ":" + zeropad(d.getMinutes()); |
6b8e33dd DV |
1558 | } |
1559 | } | |
1560 | ||
1561 | /** | |
bf640e56 AV |
1562 | * Convert a JS date to a string appropriate to display on an axis that |
1563 | * is displaying values at the stated granularity. | |
1564 | * @param {Date} date The date to format | |
1565 | * @param {Number} granularity One of the Dygraph granularity constants | |
1566 | * @return {String} The formatted date | |
1567 | * @private | |
1568 | */ | |
1569 | Dygraph.dateAxisFormatter = function(date, granularity) { | |
5f70132f DV |
1570 | if (granularity >= Dygraph.DECADAL) { |
1571 | return date.strftime('%Y'); | |
1572 | } else if (granularity >= Dygraph.MONTHLY) { | |
bf640e56 AV |
1573 | return date.strftime('%b %y'); |
1574 | } else { | |
31eddad3 | 1575 | var frac = date.getHours() * 3600 + date.getMinutes() * 60 + date.getSeconds() + date.getMilliseconds(); |
bf640e56 AV |
1576 | if (frac == 0 || granularity >= Dygraph.DAILY) { |
1577 | return new Date(date.getTime() + 3600*1000).strftime('%d%b'); | |
1578 | } else { | |
1579 | return Dygraph.hmsString_(date.getTime()); | |
1580 | } | |
1581 | } | |
1582 | } | |
1583 | ||
1584 | /** | |
6a1aa64f DV |
1585 | * Convert a JS date (millis since epoch) to YYYY/MM/DD |
1586 | * @param {Number} date The JavaScript date (ms since epoch) | |
1587 | * @return {String} A date of the form "YYYY/MM/DD" | |
1588 | * @private | |
1589 | */ | |
6be8e54c | 1590 | Dygraph.dateString_ = function(date) { |
285a6bda | 1591 | var zeropad = Dygraph.zeropad; |
6a1aa64f DV |
1592 | var d = new Date(date); |
1593 | ||
1594 | // Get the year: | |
1595 | var year = "" + d.getFullYear(); | |
1596 | // Get a 0 padded month string | |
6b8e33dd | 1597 | var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh |
6a1aa64f | 1598 | // Get a 0 padded day string |
6b8e33dd | 1599 | var day = zeropad(d.getDate()); |
6a1aa64f | 1600 | |
6b8e33dd DV |
1601 | var ret = ""; |
1602 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); | |
bf640e56 | 1603 | if (frac) ret = " " + Dygraph.hmsString_(date); |
6b8e33dd DV |
1604 | |
1605 | return year + "/" + month + "/" + day + ret; | |
6a1aa64f DV |
1606 | }; |
1607 | ||
1608 | /** | |
6a1aa64f DV |
1609 | * Fires when there's data available to be graphed. |
1610 | * @param {String} data Raw CSV data to be plotted | |
1611 | * @private | |
1612 | */ | |
285a6bda | 1613 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f | 1614 | this.rawData_ = this.parseCSV_(data); |
26ca7938 | 1615 | this.predraw_(); |
6a1aa64f DV |
1616 | }; |
1617 | ||
285a6bda | 1618 | Dygraph.prototype.months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", |
8846615a | 1619 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]; |
285a6bda | 1620 | Dygraph.prototype.quarters = ["Jan", "Apr", "Jul", "Oct"]; |
6a1aa64f DV |
1621 | |
1622 | /** | |
1623 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
1624 | * @private | |
1625 | */ | |
285a6bda | 1626 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f | 1627 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
6be8e54c JB |
1628 | var opts = {xTicks: []}; |
1629 | var formatter = this.attr_('xTicker'); | |
6a1aa64f | 1630 | if (this.dateWindow_) { |
6be8e54c | 1631 | opts.xTicks = formatter(this.dateWindow_[0], this.dateWindow_[1], this); |
6a1aa64f | 1632 | } else { |
6be8e54c JB |
1633 | // numericTicks() returns multiple values. |
1634 | var ret = formatter(this.rawData_[0][0], | |
1635 | this.rawData_[this.rawData_.length - 1][0], this); | |
1636 | opts.xTicks = ret.ticks; | |
1637 | this.numXDigits_ = ret.numDigits; | |
3c1d225b | 1638 | } |
6be8e54c | 1639 | this.layout_.updateOptions(opts); |
32988383 DV |
1640 | }; |
1641 | ||
1642 | // Time granularity enumeration | |
285a6bda | 1643 | Dygraph.SECONDLY = 0; |
20a41c17 DV |
1644 | Dygraph.TWO_SECONDLY = 1; |
1645 | Dygraph.FIVE_SECONDLY = 2; | |
1646 | Dygraph.TEN_SECONDLY = 3; | |
1647 | Dygraph.THIRTY_SECONDLY = 4; | |
1648 | Dygraph.MINUTELY = 5; | |
1649 | Dygraph.TWO_MINUTELY = 6; | |
1650 | Dygraph.FIVE_MINUTELY = 7; | |
1651 | Dygraph.TEN_MINUTELY = 8; | |
1652 | Dygraph.THIRTY_MINUTELY = 9; | |
1653 | Dygraph.HOURLY = 10; | |
1654 | Dygraph.TWO_HOURLY = 11; | |
1655 | Dygraph.SIX_HOURLY = 12; | |
1656 | Dygraph.DAILY = 13; | |
1657 | Dygraph.WEEKLY = 14; | |
1658 | Dygraph.MONTHLY = 15; | |
1659 | Dygraph.QUARTERLY = 16; | |
1660 | Dygraph.BIANNUAL = 17; | |
1661 | Dygraph.ANNUAL = 18; | |
1662 | Dygraph.DECADAL = 19; | |
3db4c464 | 1663 | Dygraph.CENTENNIAL = 20; |
5f70132f | 1664 | Dygraph.NUM_GRANULARITIES = 21; |
285a6bda DV |
1665 | |
1666 | Dygraph.SHORT_SPACINGS = []; | |
1667 | Dygraph.SHORT_SPACINGS[Dygraph.SECONDLY] = 1000 * 1; | |
20a41c17 DV |
1668 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_SECONDLY] = 1000 * 2; |
1669 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_SECONDLY] = 1000 * 5; | |
285a6bda DV |
1670 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_SECONDLY] = 1000 * 10; |
1671 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_SECONDLY] = 1000 * 30; | |
1672 | Dygraph.SHORT_SPACINGS[Dygraph.MINUTELY] = 1000 * 60; | |
20a41c17 DV |
1673 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_MINUTELY] = 1000 * 60 * 2; |
1674 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_MINUTELY] = 1000 * 60 * 5; | |
285a6bda DV |
1675 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_MINUTELY] = 1000 * 60 * 10; |
1676 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_MINUTELY] = 1000 * 60 * 30; | |
1677 | Dygraph.SHORT_SPACINGS[Dygraph.HOURLY] = 1000 * 3600; | |
20a41c17 | 1678 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_HOURLY] = 1000 * 3600 * 2; |
805d5519 | 1679 | Dygraph.SHORT_SPACINGS[Dygraph.SIX_HOURLY] = 1000 * 3600 * 6; |
285a6bda DV |
1680 | Dygraph.SHORT_SPACINGS[Dygraph.DAILY] = 1000 * 86400; |
1681 | Dygraph.SHORT_SPACINGS[Dygraph.WEEKLY] = 1000 * 604800; | |
32988383 DV |
1682 | |
1683 | // NumXTicks() | |
1684 | // | |
1685 | // If we used this time granularity, how many ticks would there be? | |
1686 | // This is only an approximation, but it's generally good enough. | |
1687 | // | |
285a6bda DV |
1688 | Dygraph.prototype.NumXTicks = function(start_time, end_time, granularity) { |
1689 | if (granularity < Dygraph.MONTHLY) { | |
32988383 | 1690 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1691 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
32988383 DV |
1692 | return Math.floor(0.5 + 1.0 * (end_time - start_time) / spacing); |
1693 | } else { | |
1694 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1695 | var num_months = 12; | |
285a6bda DV |
1696 | if (granularity == Dygraph.QUARTERLY) num_months = 3; |
1697 | if (granularity == Dygraph.BIANNUAL) num_months = 2; | |
1698 | if (granularity == Dygraph.ANNUAL) num_months = 1; | |
1699 | if (granularity == Dygraph.DECADAL) { num_months = 1; year_mod = 10; } | |
3db4c464 | 1700 | if (granularity == Dygraph.CENTENNIAL) { num_months = 1; year_mod = 100; } |
32988383 DV |
1701 | |
1702 | var msInYear = 365.2524 * 24 * 3600 * 1000; | |
1703 | var num_years = 1.0 * (end_time - start_time) / msInYear; | |
1704 | return Math.floor(0.5 + 1.0 * num_years * num_months / year_mod); | |
1705 | } | |
1706 | }; | |
1707 | ||
1708 | // GetXAxis() | |
1709 | // | |
1710 | // Construct an x-axis of nicely-formatted times on meaningful boundaries | |
1711 | // (e.g. 'Jan 09' rather than 'Jan 22, 2009'). | |
1712 | // | |
1713 | // Returns an array containing {v: millis, label: label} dictionaries. | |
1714 | // | |
285a6bda | 1715 | Dygraph.prototype.GetXAxis = function(start_time, end_time, granularity) { |
bf640e56 | 1716 | var formatter = this.attr_("xAxisLabelFormatter"); |
32988383 | 1717 | var ticks = []; |
285a6bda | 1718 | if (granularity < Dygraph.MONTHLY) { |
32988383 | 1719 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1720 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
3d29302c | 1721 | var format = '%d%b'; // e.g. "1Jan" |
076c9622 DV |
1722 | |
1723 | // Find a time less than start_time which occurs on a "nice" time boundary | |
1724 | // for this granularity. | |
1725 | var g = spacing / 1000; | |
076c9622 DV |
1726 | var d = new Date(start_time); |
1727 | if (g <= 60) { // seconds | |
1728 | var x = d.getSeconds(); d.setSeconds(x - x % g); | |
1729 | } else { | |
1730 | d.setSeconds(0); | |
1731 | g /= 60; | |
1732 | if (g <= 60) { // minutes | |
1733 | var x = d.getMinutes(); d.setMinutes(x - x % g); | |
1734 | } else { | |
1735 | d.setMinutes(0); | |
1736 | g /= 60; | |
1737 | ||
1738 | if (g <= 24) { // days | |
1739 | var x = d.getHours(); d.setHours(x - x % g); | |
1740 | } else { | |
1741 | d.setHours(0); | |
1742 | g /= 24; | |
1743 | ||
1744 | if (g == 7) { // one week | |
20a41c17 | 1745 | d.setDate(d.getDate() - d.getDay()); |
076c9622 DV |
1746 | } |
1747 | } | |
1748 | } | |
328bb812 | 1749 | } |
076c9622 DV |
1750 | start_time = d.getTime(); |
1751 | ||
32988383 | 1752 | for (var t = start_time; t <= end_time; t += spacing) { |
bf640e56 | 1753 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1754 | } |
1755 | } else { | |
1756 | // Display a tick mark on the first of a set of months of each year. | |
1757 | // Years get a tick mark iff y % year_mod == 0. This is useful for | |
1758 | // displaying a tick mark once every 10 years, say, on long time scales. | |
1759 | var months; | |
1760 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1761 | ||
285a6bda | 1762 | if (granularity == Dygraph.MONTHLY) { |
32988383 | 1763 | months = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ]; |
285a6bda | 1764 | } else if (granularity == Dygraph.QUARTERLY) { |
32988383 | 1765 | months = [ 0, 3, 6, 9 ]; |
285a6bda | 1766 | } else if (granularity == Dygraph.BIANNUAL) { |
32988383 | 1767 | months = [ 0, 6 ]; |
285a6bda | 1768 | } else if (granularity == Dygraph.ANNUAL) { |
32988383 | 1769 | months = [ 0 ]; |
285a6bda | 1770 | } else if (granularity == Dygraph.DECADAL) { |
32988383 DV |
1771 | months = [ 0 ]; |
1772 | year_mod = 10; | |
3db4c464 | 1773 | } else if (granularity == Dygraph.CENTENNIAL) { |
5f70132f DV |
1774 | months = [ 0 ]; |
1775 | year_mod = 100; | |
1776 | } else { | |
1777 | this.warn("Span of dates is too long"); | |
32988383 DV |
1778 | } |
1779 | ||
1780 | var start_year = new Date(start_time).getFullYear(); | |
1781 | var end_year = new Date(end_time).getFullYear(); | |
285a6bda | 1782 | var zeropad = Dygraph.zeropad; |
32988383 DV |
1783 | for (var i = start_year; i <= end_year; i++) { |
1784 | if (i % year_mod != 0) continue; | |
1785 | for (var j = 0; j < months.length; j++) { | |
1786 | var date_str = i + "/" + zeropad(1 + months[j]) + "/01"; | |
1787 | var t = Date.parse(date_str); | |
1788 | if (t < start_time || t > end_time) continue; | |
bf640e56 | 1789 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1790 | } |
1791 | } | |
1792 | } | |
1793 | ||
1794 | return ticks; | |
1795 | }; | |
1796 | ||
6a1aa64f DV |
1797 | |
1798 | /** | |
1799 | * Add ticks to the x-axis based on a date range. | |
1800 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1801 | * @param {Number} endDate End of the date window (millis since epoch) | |
1802 | * @return {Array.<Object>} Array of {label, value} tuples. | |
1803 | * @public | |
1804 | */ | |
285a6bda | 1805 | Dygraph.dateTicker = function(startDate, endDate, self) { |
32988383 | 1806 | var chosen = -1; |
285a6bda DV |
1807 | for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) { |
1808 | var num_ticks = self.NumXTicks(startDate, endDate, i); | |
1809 | if (self.width_ / num_ticks >= self.attr_('pixelsPerXLabel')) { | |
32988383 DV |
1810 | chosen = i; |
1811 | break; | |
2769de62 | 1812 | } |
6a1aa64f DV |
1813 | } |
1814 | ||
32988383 | 1815 | if (chosen >= 0) { |
285a6bda | 1816 | return self.GetXAxis(startDate, endDate, chosen); |
6a1aa64f | 1817 | } else { |
32988383 | 1818 | // TODO(danvk): signal error. |
6a1aa64f | 1819 | } |
6a1aa64f DV |
1820 | }; |
1821 | ||
1822 | /** | |
3c1d225b JB |
1823 | * Determine the number of significant figures in a Number up to the specified |
1824 | * precision. Note that there is no way to determine if a trailing '0' is | |
1825 | * significant or not, so by convention we return 1 for all of the following | |
1826 | * inputs: 1, 1.0, 1.00, 1.000 etc. | |
1827 | * @param {Number} x The input value. | |
1828 | * @param {Number} opt_maxPrecision Optional maximum precision to consider. | |
1829 | * Default and maximum allowed value is 13. | |
1830 | * @return {Number} The number of significant figures which is >= 1. | |
1831 | */ | |
1832 | Dygraph.significantFigures = function(x, opt_maxPrecision) { | |
1833 | var precision = Math.max(opt_maxPrecision || 13, 13); | |
1834 | ||
fff1de86 | 1835 | // Convert the number to its exponential notation form and work backwards, |
3c1d225b JB |
1836 | // ignoring the 'e+xx' bit. This may seem like a hack, but doing a loop and |
1837 | // dividing by 10 leads to roundoff errors. By using toExponential(), we let | |
1838 | // the JavaScript interpreter handle the low level bits of the Number for us. | |
1839 | var s = x.toExponential(precision); | |
1840 | var ePos = s.lastIndexOf('e'); // -1 case handled by return below. | |
1841 | ||
1842 | for (var i = ePos - 1; i >= 0; i--) { | |
1843 | if (s[i] == '.') { | |
1844 | // Got to the decimal place. We'll call this 1 digit of precision because | |
1845 | // we can't know for sure how many trailing 0s are significant. | |
1846 | return 1; | |
1847 | } else if (s[i] != '0') { | |
1848 | // Found the first non-zero digit. Return the number of characters | |
1849 | // except for the '.'. | |
1850 | return i; // This is i - 1 + 1 (-1 is for '.', +1 is for 0 based index). | |
1851 | } | |
1852 | } | |
1853 | ||
1854 | // Occurs if toExponential() doesn't return a string containing 'e', which | |
1855 | // should never happen. | |
1856 | return 1; | |
1857 | }; | |
1858 | ||
1859 | /** | |
6a1aa64f DV |
1860 | * Add ticks when the x axis has numbers on it (instead of dates) |
1861 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1862 | * @param {Number} endDate End of the date window (millis since epoch) | |
84fc6aa7 | 1863 | * @param self |
f30cf740 | 1864 | * @param {function} attribute accessor function. |
6a1aa64f DV |
1865 | * @return {Array.<Object>} Array of {label, value} tuples. |
1866 | * @public | |
1867 | */ | |
0d64e596 | 1868 | Dygraph.numericTicks = function(minV, maxV, self, axis_props, vals) { |
70c80071 DV |
1869 | var attr = function(k) { |
1870 | if (axis_props && axis_props.hasOwnProperty(k)) return axis_props[k]; | |
1871 | return self.attr_(k); | |
1872 | }; | |
f09fc545 | 1873 | |
0d64e596 DV |
1874 | var ticks = []; |
1875 | if (vals) { | |
1876 | for (var i = 0; i < vals.length; i++) { | |
fff1de86 | 1877 | ticks[i].push({v: vals[i]}); |
0d64e596 | 1878 | } |
f09e46d4 | 1879 | } else { |
0d64e596 DV |
1880 | // Basic idea: |
1881 | // Try labels every 1, 2, 5, 10, 20, 50, 100, etc. | |
1882 | // Calculate the resulting tick spacing (i.e. this.height_ / nTicks). | |
1883 | // The first spacing greater than pixelsPerYLabel is what we use. | |
1884 | // TODO(danvk): version that works on a log scale. | |
f09fc545 | 1885 | if (attr("labelsKMG2")) { |
0d64e596 | 1886 | var mults = [1, 2, 4, 8]; |
f09e46d4 | 1887 | } else { |
0d64e596 | 1888 | var mults = [1, 2, 5]; |
f09e46d4 | 1889 | } |
0d64e596 DV |
1890 | var scale, low_val, high_val, nTicks; |
1891 | // TODO(danvk): make it possible to set this for x- and y-axes independently. | |
1892 | var pixelsPerTick = attr('pixelsPerYLabel'); | |
1893 | for (var i = -10; i < 50; i++) { | |
1894 | if (attr("labelsKMG2")) { | |
1895 | var base_scale = Math.pow(16, i); | |
1896 | } else { | |
1897 | var base_scale = Math.pow(10, i); | |
1898 | } | |
1899 | for (var j = 0; j < mults.length; j++) { | |
1900 | scale = base_scale * mults[j]; | |
1901 | low_val = Math.floor(minV / scale) * scale; | |
1902 | high_val = Math.ceil(maxV / scale) * scale; | |
1903 | nTicks = Math.abs(high_val - low_val) / scale; | |
1904 | var spacing = self.height_ / nTicks; | |
1905 | // wish I could break out of both loops at once... | |
1906 | if (spacing > pixelsPerTick) break; | |
1907 | } | |
285a6bda | 1908 | if (spacing > pixelsPerTick) break; |
c6336f04 | 1909 | } |
0d64e596 DV |
1910 | |
1911 | // Construct the set of ticks. | |
1912 | // Allow reverse y-axis if it's explicitly requested. | |
1913 | if (low_val > high_val) scale *= -1; | |
1914 | for (var i = 0; i < nTicks; i++) { | |
1915 | var tickV = low_val + i * scale; | |
fff1de86 | 1916 | ticks.push( {v: tickV} ); |
0d64e596 | 1917 | } |
6a1aa64f DV |
1918 | } |
1919 | ||
0d64e596 | 1920 | // Add formatted labels to the ticks. |
ed11be50 DV |
1921 | var k; |
1922 | var k_labels = []; | |
f09fc545 | 1923 | if (attr("labelsKMB")) { |
ed11be50 DV |
1924 | k = 1000; |
1925 | k_labels = [ "K", "M", "B", "T" ]; | |
1926 | } | |
f09fc545 | 1927 | if (attr("labelsKMG2")) { |
ed11be50 DV |
1928 | if (k) self.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); |
1929 | k = 1024; | |
1930 | k_labels = [ "k", "M", "G", "T" ]; | |
1931 | } | |
3c1d225b JB |
1932 | var formatter = attr('yAxisLabelFormatter') ? |
1933 | attr('yAxisLabelFormatter') : attr('yValueFormatter'); | |
1934 | ||
1935 | // Determine the number of decimal places needed for the labels below by | |
1936 | // taking the maximum number of significant figures for any label. We must | |
1937 | // take the max because we can't tell if trailing 0s are significant. | |
1938 | var numDigits = 0; | |
1939 | for (var i = 0; i < ticks.length; i++) { | |
fff1de86 | 1940 | numDigits = Math.max(Dygraph.significantFigures(ticks[i].v), numDigits); |
3c1d225b | 1941 | } |
ed11be50 | 1942 | |
0d64e596 DV |
1943 | for (var i = 0; i < ticks.length; i++) { |
1944 | var tickV = ticks[i].v; | |
0af6e346 | 1945 | var absTickV = Math.abs(tickV); |
3c1d225b JB |
1946 | var label = (formatter !== undefined) ? |
1947 | formatter(tickV, numDigits) : tickV.toPrecision(numDigits); | |
1948 | if (k_labels.length > 0) { | |
ed11be50 DV |
1949 | // Round up to an appropriate unit. |
1950 | var n = k*k*k*k; | |
1951 | for (var j = 3; j >= 0; j--, n /= k) { | |
1952 | if (absTickV >= n) { | |
3c1d225b | 1953 | label = (tickV / n).toPrecision(numDigits) + k_labels[j]; |
ed11be50 DV |
1954 | break; |
1955 | } | |
afefbcdb | 1956 | } |
6a1aa64f | 1957 | } |
0d64e596 | 1958 | ticks[i].label = label; |
6a1aa64f | 1959 | } |
3c1d225b | 1960 | return {ticks: ticks, numDigits: numDigits}; |
6a1aa64f DV |
1961 | }; |
1962 | ||
5011e7a1 DV |
1963 | // Computes the range of the data series (including confidence intervals). |
1964 | // series is either [ [x1, y1], [x2, y2], ... ] or | |
1965 | // [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... | |
1966 | // Returns [low, high] | |
1967 | Dygraph.prototype.extremeValues_ = function(series) { | |
1968 | var minY = null, maxY = null; | |
1969 | ||
9922b78b | 1970 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
5011e7a1 DV |
1971 | if (bars) { |
1972 | // With custom bars, maxY is the max of the high values. | |
1973 | for (var j = 0; j < series.length; j++) { | |
1974 | var y = series[j][1][0]; | |
1975 | if (!y) continue; | |
1976 | var low = y - series[j][1][1]; | |
1977 | var high = y + series[j][1][2]; | |
1978 | if (low > y) low = y; // this can happen with custom bars, | |
1979 | if (high < y) high = y; // e.g. in tests/custom-bars.html | |
1980 | if (maxY == null || high > maxY) { | |
1981 | maxY = high; | |
1982 | } | |
1983 | if (minY == null || low < minY) { | |
1984 | minY = low; | |
1985 | } | |
1986 | } | |
1987 | } else { | |
1988 | for (var j = 0; j < series.length; j++) { | |
1989 | var y = series[j][1]; | |
d12999d3 | 1990 | if (y === null || isNaN(y)) continue; |
5011e7a1 DV |
1991 | if (maxY == null || y > maxY) { |
1992 | maxY = y; | |
1993 | } | |
1994 | if (minY == null || y < minY) { | |
1995 | minY = y; | |
1996 | } | |
1997 | } | |
1998 | } | |
1999 | ||
2000 | return [minY, maxY]; | |
2001 | }; | |
2002 | ||
6a1aa64f | 2003 | /** |
26ca7938 DV |
2004 | * This function is called once when the chart's data is changed or the options |
2005 | * dictionary is updated. It is _not_ called when the user pans or zooms. The | |
2006 | * idea is that values derived from the chart's data can be computed here, | |
2007 | * rather than every time the chart is drawn. This includes things like the | |
2008 | * number of axes, rolling averages, etc. | |
2009 | */ | |
2010 | Dygraph.prototype.predraw_ = function() { | |
2011 | // TODO(danvk): move more computations out of drawGraph_ and into here. | |
2012 | this.computeYAxes_(); | |
2013 | ||
2014 | // Create a new plotter. | |
70c80071 | 2015 | if (this.plotter_) this.plotter_.clear(); |
26ca7938 DV |
2016 | this.plotter_ = new DygraphCanvasRenderer(this, |
2017 | this.hidden_, this.layout_, | |
2018 | this.renderOptions_); | |
2019 | ||
0abfbd7e DV |
2020 | // The roller sits in the bottom left corner of the chart. We don't know where |
2021 | // this will be until the options are available, so it's positioned here. | |
8c69de65 | 2022 | this.createRollInterface_(); |
26ca7938 | 2023 | |
0abfbd7e DV |
2024 | // Same thing applies for the labelsDiv. It's right edge should be flush with |
2025 | // the right edge of the charting area (which may not be the same as the right | |
2026 | // edge of the div, if we have two y-axes. | |
2027 | this.positionLabelsDiv_(); | |
2028 | ||
26ca7938 DV |
2029 | // If the data or options have changed, then we'd better redraw. |
2030 | this.drawGraph_(); | |
2031 | }; | |
2032 | ||
2033 | /** | |
2f5e7e1a | 2034 | ======= |
26ca7938 DV |
2035 | * Update the graph with new data. This method is called when the viewing area |
2036 | * has changed. If the underlying data or options have changed, predraw_ will | |
2037 | * be called before drawGraph_ is called. | |
6a1aa64f DV |
2038 | * @private |
2039 | */ | |
26ca7938 DV |
2040 | Dygraph.prototype.drawGraph_ = function() { |
2041 | var data = this.rawData_; | |
2042 | ||
fe0b7c03 DV |
2043 | // This is used to set the second parameter to drawCallback, below. |
2044 | var is_initial_draw = this.is_initial_draw_; | |
2045 | this.is_initial_draw_ = false; | |
2046 | ||
3bd9c228 | 2047 | var minY = null, maxY = null; |
6a1aa64f | 2048 | this.layout_.removeAllDatasets(); |
285a6bda | 2049 | this.setColors_(); |
9317362d | 2050 | this.attrs_['pointSize'] = 0.5 * this.attr_('highlightCircleSize'); |
285a6bda | 2051 | |
354e15ab DE |
2052 | // Loop over the fields (series). Go from the last to the first, |
2053 | // because if they're stacked that's how we accumulate the values. | |
43af96e7 | 2054 | |
354e15ab DE |
2055 | var cumulative_y = []; // For stacked series. |
2056 | var datasets = []; | |
2057 | ||
f09fc545 DV |
2058 | var extremes = {}; // series name -> [low, high] |
2059 | ||
354e15ab DE |
2060 | // Loop over all fields and create datasets |
2061 | for (var i = data[0].length - 1; i >= 1; i--) { | |
1cf11047 DV |
2062 | if (!this.visibility()[i - 1]) continue; |
2063 | ||
f09fc545 | 2064 | var seriesName = this.attr_("labels")[i]; |
450fe64b DV |
2065 | var connectSeparatedPoints = this.attr_('connectSeparatedPoints', i); |
2066 | ||
6a1aa64f DV |
2067 | var series = []; |
2068 | for (var j = 0; j < data.length; j++) { | |
4a634fc7 | 2069 | if (data[j][i] != null || !connectSeparatedPoints) { |
f032c51d | 2070 | var date = data[j][0]; |
563c70ca | 2071 | series.push([date, data[j][i]]); |
f032c51d | 2072 | } |
6a1aa64f | 2073 | } |
2f5e7e1a DV |
2074 | |
2075 | // TODO(danvk): move this into predraw_. It's insane to do it here. | |
6a1aa64f DV |
2076 | series = this.rollingAverage(series, this.rollPeriod_); |
2077 | ||
2078 | // Prune down to the desired range, if necessary (for zooming) | |
1a26f3fb DV |
2079 | // Because there can be lines going to points outside of the visible area, |
2080 | // we actually prune to visible points, plus one on either side. | |
9922b78b | 2081 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
6a1aa64f DV |
2082 | if (this.dateWindow_) { |
2083 | var low = this.dateWindow_[0]; | |
2084 | var high= this.dateWindow_[1]; | |
2085 | var pruned = []; | |
1a26f3fb DV |
2086 | // TODO(danvk): do binary search instead of linear search. |
2087 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. | |
2088 | var firstIdx = null, lastIdx = null; | |
6a1aa64f | 2089 | for (var k = 0; k < series.length; k++) { |
1a26f3fb DV |
2090 | if (series[k][0] >= low && firstIdx === null) { |
2091 | firstIdx = k; | |
2092 | } | |
2093 | if (series[k][0] <= high) { | |
2094 | lastIdx = k; | |
6a1aa64f DV |
2095 | } |
2096 | } | |
1a26f3fb DV |
2097 | if (firstIdx === null) firstIdx = 0; |
2098 | if (firstIdx > 0) firstIdx--; | |
2099 | if (lastIdx === null) lastIdx = series.length - 1; | |
2100 | if (lastIdx < series.length - 1) lastIdx++; | |
16269f6e | 2101 | this.boundaryIds_[i-1] = [firstIdx, lastIdx]; |
1a26f3fb DV |
2102 | for (var k = firstIdx; k <= lastIdx; k++) { |
2103 | pruned.push(series[k]); | |
6a1aa64f DV |
2104 | } |
2105 | series = pruned; | |
16269f6e NAG |
2106 | } else { |
2107 | this.boundaryIds_[i-1] = [0, series.length-1]; | |
6a1aa64f DV |
2108 | } |
2109 | ||
f09fc545 | 2110 | var seriesExtremes = this.extremeValues_(series); |
5011e7a1 | 2111 | |
6a1aa64f | 2112 | if (bars) { |
354e15ab DE |
2113 | for (var j=0; j<series.length; j++) { |
2114 | val = [series[j][0], series[j][1][0], series[j][1][1], series[j][1][2]]; | |
2115 | series[j] = val; | |
2116 | } | |
43af96e7 | 2117 | } else if (this.attr_("stackedGraph")) { |
43af96e7 NK |
2118 | var l = series.length; |
2119 | var actual_y; | |
2120 | for (var j = 0; j < l; j++) { | |
354e15ab DE |
2121 | // If one data set has a NaN, let all subsequent stacked |
2122 | // sets inherit the NaN -- only start at 0 for the first set. | |
2123 | var x = series[j][0]; | |
41b0f691 | 2124 | if (cumulative_y[x] === undefined) { |
354e15ab | 2125 | cumulative_y[x] = 0; |
41b0f691 | 2126 | } |
43af96e7 NK |
2127 | |
2128 | actual_y = series[j][1]; | |
354e15ab | 2129 | cumulative_y[x] += actual_y; |
43af96e7 | 2130 | |
354e15ab | 2131 | series[j] = [x, cumulative_y[x]] |
43af96e7 | 2132 | |
41b0f691 DV |
2133 | if (cumulative_y[x] > seriesExtremes[1]) { |
2134 | seriesExtremes[1] = cumulative_y[x]; | |
2135 | } | |
2136 | if (cumulative_y[x] < seriesExtremes[0]) { | |
2137 | seriesExtremes[0] = cumulative_y[x]; | |
2138 | } | |
43af96e7 | 2139 | } |
6a1aa64f | 2140 | } |
41b0f691 | 2141 | extremes[seriesName] = seriesExtremes; |
354e15ab DE |
2142 | |
2143 | datasets[i] = series; | |
6a1aa64f DV |
2144 | } |
2145 | ||
354e15ab | 2146 | for (var i = 1; i < datasets.length; i++) { |
4523c1f6 | 2147 | if (!this.visibility()[i - 1]) continue; |
354e15ab | 2148 | this.layout_.addDataset(this.attr_("labels")[i], datasets[i]); |
43af96e7 NK |
2149 | } |
2150 | ||
3c1d225b JB |
2151 | this.computeYAxisRanges_(extremes); |
2152 | this.layout_.updateOptions( { yAxes: this.axes_, | |
2153 | seriesToAxisMap: this.seriesToAxisMap_ | |
9012dd21 | 2154 | } ); |
f09fc545 | 2155 | |
6a1aa64f DV |
2156 | this.addXTicks_(); |
2157 | ||
2158 | // Tell PlotKit to use this new data and render itself | |
d033ae1c | 2159 | this.layout_.updateOptions({dateWindow: this.dateWindow_}); |
6a1aa64f DV |
2160 | this.layout_.evaluateWithError(); |
2161 | this.plotter_.clear(); | |
2162 | this.plotter_.render(); | |
f6401bf6 | 2163 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
2f5e7e1a | 2164 | this.canvas_.height); |
599fb4ad DV |
2165 | |
2166 | if (this.attr_("drawCallback") !== null) { | |
fe0b7c03 | 2167 | this.attr_("drawCallback")(this, is_initial_draw); |
599fb4ad | 2168 | } |
6a1aa64f DV |
2169 | }; |
2170 | ||
2171 | /** | |
26ca7938 DV |
2172 | * Determine properties of the y-axes which are independent of the data |
2173 | * currently being displayed. This includes things like the number of axes and | |
2174 | * the style of the axes. It does not include the range of each axis and its | |
2175 | * tick marks. | |
2176 | * This fills in this.axes_ and this.seriesToAxisMap_. | |
2177 | * axes_ = [ { options } ] | |
2178 | * seriesToAxisMap_ = { seriesName: 0, seriesName2: 1, ... } | |
2179 | * indices are into the axes_ array. | |
f09fc545 | 2180 | */ |
26ca7938 DV |
2181 | Dygraph.prototype.computeYAxes_ = function() { |
2182 | this.axes_ = [{}]; // always have at least one y-axis. | |
2183 | this.seriesToAxisMap_ = {}; | |
2184 | ||
2185 | // Get a list of series names. | |
2186 | var labels = this.attr_("labels"); | |
1c77a3a1 | 2187 | var series = {}; |
26ca7938 | 2188 | for (var i = 1; i < labels.length; i++) series[labels[i]] = (i - 1); |
f09fc545 DV |
2189 | |
2190 | // all options which could be applied per-axis: | |
2191 | var axisOptions = [ | |
2192 | 'includeZero', | |
2193 | 'valueRange', | |
2194 | 'labelsKMB', | |
2195 | 'labelsKMG2', | |
2196 | 'pixelsPerYLabel', | |
2197 | 'yAxisLabelWidth', | |
2198 | 'axisLabelFontSize', | |
2199 | 'axisTickSize' | |
2200 | ]; | |
2201 | ||
2202 | // Copy global axis options over to the first axis. | |
2203 | for (var i = 0; i < axisOptions.length; i++) { | |
2204 | var k = axisOptions[i]; | |
2205 | var v = this.attr_(k); | |
26ca7938 | 2206 | if (v) this.axes_[0][k] = v; |
f09fc545 DV |
2207 | } |
2208 | ||
2209 | // Go through once and add all the axes. | |
26ca7938 DV |
2210 | for (var seriesName in series) { |
2211 | if (!series.hasOwnProperty(seriesName)) continue; | |
f09fc545 DV |
2212 | var axis = this.attr_("axis", seriesName); |
2213 | if (axis == null) { | |
26ca7938 | 2214 | this.seriesToAxisMap_[seriesName] = 0; |
f09fc545 DV |
2215 | continue; |
2216 | } | |
2217 | if (typeof(axis) == 'object') { | |
2218 | // Add a new axis, making a copy of its per-axis options. | |
2219 | var opts = {}; | |
26ca7938 | 2220 | Dygraph.update(opts, this.axes_[0]); |
f09fc545 DV |
2221 | Dygraph.update(opts, { valueRange: null }); // shouldn't inherit this. |
2222 | Dygraph.update(opts, axis); | |
26ca7938 DV |
2223 | this.axes_.push(opts); |
2224 | this.seriesToAxisMap_[seriesName] = this.axes_.length - 1; | |
f09fc545 DV |
2225 | } |
2226 | } | |
2227 | ||
2228 | // Go through one more time and assign series to an axis defined by another | |
2229 | // series, e.g. { 'Y1: { axis: {} }, 'Y2': { axis: 'Y1' } } | |
26ca7938 DV |
2230 | for (var seriesName in series) { |
2231 | if (!series.hasOwnProperty(seriesName)) continue; | |
f09fc545 DV |
2232 | var axis = this.attr_("axis", seriesName); |
2233 | if (typeof(axis) == 'string') { | |
26ca7938 | 2234 | if (!this.seriesToAxisMap_.hasOwnProperty(axis)) { |
f09fc545 DV |
2235 | this.error("Series " + seriesName + " wants to share a y-axis with " + |
2236 | "series " + axis + ", which does not define its own axis."); | |
2237 | return null; | |
2238 | } | |
26ca7938 DV |
2239 | var idx = this.seriesToAxisMap_[axis]; |
2240 | this.seriesToAxisMap_[seriesName] = idx; | |
f09fc545 DV |
2241 | } |
2242 | } | |
1c77a3a1 DV |
2243 | |
2244 | // Now we remove series from seriesToAxisMap_ which are not visible. We do | |
2245 | // this last so that hiding the first series doesn't destroy the axis | |
2246 | // properties of the primary axis. | |
2247 | var seriesToAxisFiltered = {}; | |
2248 | var vis = this.visibility(); | |
2249 | for (var i = 1; i < labels.length; i++) { | |
2250 | var s = labels[i]; | |
2251 | if (vis[i - 1]) seriesToAxisFiltered[s] = this.seriesToAxisMap_[s]; | |
2252 | } | |
2253 | this.seriesToAxisMap_ = seriesToAxisFiltered; | |
26ca7938 DV |
2254 | }; |
2255 | ||
2256 | /** | |
2257 | * Returns the number of y-axes on the chart. | |
2258 | * @return {Number} the number of axes. | |
2259 | */ | |
2260 | Dygraph.prototype.numAxes = function() { | |
2261 | var last_axis = 0; | |
2262 | for (var series in this.seriesToAxisMap_) { | |
2263 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; | |
2264 | var idx = this.seriesToAxisMap_[series]; | |
2265 | if (idx > last_axis) last_axis = idx; | |
2266 | } | |
2267 | return 1 + last_axis; | |
2268 | }; | |
2269 | ||
2270 | /** | |
2271 | * Determine the value range and tick marks for each axis. | |
2272 | * @param {Object} extremes A mapping from seriesName -> [low, high] | |
2273 | * This fills in the valueRange and ticks fields in each entry of this.axes_. | |
2274 | */ | |
2275 | Dygraph.prototype.computeYAxisRanges_ = function(extremes) { | |
2276 | // Build a map from axis number -> [list of series names] | |
2277 | var seriesForAxis = []; | |
2278 | for (var series in this.seriesToAxisMap_) { | |
2279 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; | |
2280 | var idx = this.seriesToAxisMap_[series]; | |
2281 | while (seriesForAxis.length <= idx) seriesForAxis.push([]); | |
2282 | seriesForAxis[idx].push(series); | |
2283 | } | |
f09fc545 DV |
2284 | |
2285 | // Compute extreme values, a span and tick marks for each axis. | |
26ca7938 DV |
2286 | for (var i = 0; i < this.axes_.length; i++) { |
2287 | var axis = this.axes_[i]; | |
d58ae307 DV |
2288 | if (axis.valueWindow) { |
2289 | // This is only set if the user has zoomed on the y-axis. It is never set | |
2290 | // by a user. It takes precedence over axis.valueRange because, if you set | |
2291 | // valueRange, you'd still expect to be able to pan. | |
2292 | axis.computedValueRange = [axis.valueWindow[0], axis.valueWindow[1]]; | |
2293 | } else if (axis.valueRange) { | |
2294 | // This is a user-set value range for this axis. | |
26ca7938 DV |
2295 | axis.computedValueRange = [axis.valueRange[0], axis.valueRange[1]]; |
2296 | } else { | |
1c77a3a1 | 2297 | // Calculate the extremes of extremes. |
f09fc545 DV |
2298 | var series = seriesForAxis[i]; |
2299 | var minY = Infinity; // extremes[series[0]][0]; | |
2300 | var maxY = -Infinity; // extremes[series[0]][1]; | |
2301 | for (var j = 0; j < series.length; j++) { | |
2302 | minY = Math.min(extremes[series[j]][0], minY); | |
e3b6727e | 2303 | maxY = Math.max(extremes[series[j]][1], maxY); |
f09fc545 DV |
2304 | } |
2305 | if (axis.includeZero && minY > 0) minY = 0; | |
2306 | ||
2307 | // Add some padding and round up to an integer to be human-friendly. | |
2308 | var span = maxY - minY; | |
2309 | // special case: if we have no sense of scale, use +/-10% of the sole value. | |
2310 | if (span == 0) { span = maxY; } | |
2311 | var maxAxisY = maxY + 0.1 * span; | |
2312 | var minAxisY = minY - 0.1 * span; | |
2313 | ||
2314 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. | |
2f5e7e1a DV |
2315 | if (!this.attr_("avoidMinZero")) { |
2316 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; | |
2317 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
2318 | } | |
f09fc545 DV |
2319 | |
2320 | if (this.attr_("includeZero")) { | |
2321 | if (maxY < 0) maxAxisY = 0; | |
2322 | if (minY > 0) minAxisY = 0; | |
2323 | } | |
2324 | ||
26ca7938 | 2325 | axis.computedValueRange = [minAxisY, maxAxisY]; |
f09fc545 DV |
2326 | } |
2327 | ||
0d64e596 DV |
2328 | // Add ticks. By default, all axes inherit the tick positions of the |
2329 | // primary axis. However, if an axis is specifically marked as having | |
2330 | // independent ticks, then that is permissible as well. | |
2331 | if (i == 0 || axis.independentTicks) { | |
3c1d225b | 2332 | var ret = |
0d64e596 DV |
2333 | Dygraph.numericTicks(axis.computedValueRange[0], |
2334 | axis.computedValueRange[1], | |
2335 | this, | |
2336 | axis); | |
3c1d225b | 2337 | axis.ticks = ret.ticks; |
6be8e54c | 2338 | this.numYDigits_ = ret.numDigits; |
0d64e596 DV |
2339 | } else { |
2340 | var p_axis = this.axes_[0]; | |
2341 | var p_ticks = p_axis.ticks; | |
2342 | var p_scale = p_axis.computedValueRange[1] - p_axis.computedValueRange[0]; | |
2343 | var scale = axis.computedValueRange[1] - axis.computedValueRange[0]; | |
2344 | var tick_values = []; | |
2345 | for (var i = 0; i < p_ticks.length; i++) { | |
2346 | var y_frac = (p_ticks[i].v - p_axis.computedValueRange[0]) / p_scale; | |
2347 | var y_val = axis.computedValueRange[0] + y_frac * scale; | |
2348 | tick_values.push(y_val); | |
2349 | } | |
2350 | ||
3c1d225b | 2351 | var ret = |
0d64e596 DV |
2352 | Dygraph.numericTicks(axis.computedValueRange[0], |
2353 | axis.computedValueRange[1], | |
2354 | this, axis, tick_values); | |
3c1d225b | 2355 | axis.ticks = ret.ticks; |
6be8e54c | 2356 | this.numYDigits_ = ret.numDigits; |
0d64e596 | 2357 | } |
f09fc545 | 2358 | } |
f09fc545 DV |
2359 | }; |
2360 | ||
2361 | /** | |
6a1aa64f DV |
2362 | * Calculates the rolling average of a data set. |
2363 | * If originalData is [label, val], rolls the average of those. | |
2364 | * If originalData is [label, [, it's interpreted as [value, stddev] | |
2365 | * and the roll is returned in the same form, with appropriately reduced | |
2366 | * stddev for each value. | |
2367 | * Note that this is where fractional input (i.e. '5/10') is converted into | |
2368 | * decimal values. | |
2369 | * @param {Array} originalData The data in the appropriate format (see above) | |
3c1d225b JB |
2370 | * @param {Number} rollPeriod The number of points over which to average the |
2371 | * data | |
6a1aa64f | 2372 | */ |
285a6bda | 2373 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
6a1aa64f DV |
2374 | if (originalData.length < 2) |
2375 | return originalData; | |
2376 | var rollPeriod = Math.min(rollPeriod, originalData.length - 1); | |
2377 | var rollingData = []; | |
285a6bda | 2378 | var sigma = this.attr_("sigma"); |
6a1aa64f DV |
2379 | |
2380 | if (this.fractions_) { | |
2381 | var num = 0; | |
2382 | var den = 0; // numerator/denominator | |
2383 | var mult = 100.0; | |
2384 | for (var i = 0; i < originalData.length; i++) { | |
2385 | num += originalData[i][1][0]; | |
2386 | den += originalData[i][1][1]; | |
2387 | if (i - rollPeriod >= 0) { | |
2388 | num -= originalData[i - rollPeriod][1][0]; | |
2389 | den -= originalData[i - rollPeriod][1][1]; | |
2390 | } | |
2391 | ||
2392 | var date = originalData[i][0]; | |
2393 | var value = den ? num / den : 0.0; | |
285a6bda | 2394 | if (this.attr_("errorBars")) { |
6a1aa64f DV |
2395 | if (this.wilsonInterval_) { |
2396 | // For more details on this confidence interval, see: | |
2397 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval | |
2398 | if (den) { | |
2399 | var p = value < 0 ? 0 : value, n = den; | |
2400 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); | |
2401 | var denom = 1 + sigma * sigma / den; | |
2402 | var low = (p + sigma * sigma / (2 * den) - pm) / denom; | |
2403 | var high = (p + sigma * sigma / (2 * den) + pm) / denom; | |
2404 | rollingData[i] = [date, | |
2405 | [p * mult, (p - low) * mult, (high - p) * mult]]; | |
2406 | } else { | |
2407 | rollingData[i] = [date, [0, 0, 0]]; | |
2408 | } | |
2409 | } else { | |
2410 | var stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; | |
2411 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; | |
2412 | } | |
2413 | } else { | |
2414 | rollingData[i] = [date, mult * value]; | |
2415 | } | |
2416 | } | |
9922b78b | 2417 | } else if (this.attr_("customBars")) { |
f6885d6a DV |
2418 | var low = 0; |
2419 | var mid = 0; | |
2420 | var high = 0; | |
2421 | var count = 0; | |
6a1aa64f DV |
2422 | for (var i = 0; i < originalData.length; i++) { |
2423 | var data = originalData[i][1]; | |
2424 | var y = data[1]; | |
2425 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; | |
f6885d6a | 2426 | |
8b91c51f | 2427 | if (y != null && !isNaN(y)) { |
49a7d0d5 DV |
2428 | low += data[0]; |
2429 | mid += y; | |
2430 | high += data[2]; | |
2431 | count += 1; | |
2432 | } | |
f6885d6a DV |
2433 | if (i - rollPeriod >= 0) { |
2434 | var prev = originalData[i - rollPeriod]; | |
8b91c51f | 2435 | if (prev[1][1] != null && !isNaN(prev[1][1])) { |
49a7d0d5 DV |
2436 | low -= prev[1][0]; |
2437 | mid -= prev[1][1]; | |
2438 | high -= prev[1][2]; | |
2439 | count -= 1; | |
2440 | } | |
f6885d6a DV |
2441 | } |
2442 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, | |
2443 | 1.0 * (mid - low) / count, | |
2444 | 1.0 * (high - mid) / count ]]; | |
2769de62 | 2445 | } |
6a1aa64f DV |
2446 | } else { |
2447 | // Calculate the rolling average for the first rollPeriod - 1 points where | |
3c1d225b | 2448 | // there is not enough data to roll over the full number of points |
6a1aa64f | 2449 | var num_init_points = Math.min(rollPeriod - 1, originalData.length - 2); |
285a6bda | 2450 | if (!this.attr_("errorBars")){ |
5011e7a1 DV |
2451 | if (rollPeriod == 1) { |
2452 | return originalData; | |
2453 | } | |
2454 | ||
2847c1cf | 2455 | for (var i = 0; i < originalData.length; i++) { |
6a1aa64f | 2456 | var sum = 0; |
5011e7a1 | 2457 | var num_ok = 0; |
2847c1cf DV |
2458 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
2459 | var y = originalData[j][1]; | |
8b91c51f | 2460 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 2461 | num_ok++; |
2847c1cf | 2462 | sum += originalData[j][1]; |
6a1aa64f | 2463 | } |
5011e7a1 | 2464 | if (num_ok) { |
2847c1cf | 2465 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
5011e7a1 | 2466 | } else { |
2847c1cf | 2467 | rollingData[i] = [originalData[i][0], null]; |
5011e7a1 | 2468 | } |
6a1aa64f | 2469 | } |
2847c1cf DV |
2470 | |
2471 | } else { | |
2472 | for (var i = 0; i < originalData.length; i++) { | |
6a1aa64f DV |
2473 | var sum = 0; |
2474 | var variance = 0; | |
5011e7a1 | 2475 | var num_ok = 0; |
2847c1cf | 2476 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
5011e7a1 | 2477 | var y = originalData[j][1][0]; |
8b91c51f | 2478 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 2479 | num_ok++; |
6a1aa64f DV |
2480 | sum += originalData[j][1][0]; |
2481 | variance += Math.pow(originalData[j][1][1], 2); | |
2482 | } | |
5011e7a1 DV |
2483 | if (num_ok) { |
2484 | var stddev = Math.sqrt(variance) / num_ok; | |
2485 | rollingData[i] = [originalData[i][0], | |
2486 | [sum / num_ok, sigma * stddev, sigma * stddev]]; | |
2487 | } else { | |
2488 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
2489 | } | |
6a1aa64f DV |
2490 | } |
2491 | } | |
2492 | } | |
2493 | ||
2494 | return rollingData; | |
2495 | }; | |
2496 | ||
2497 | /** | |
2498 | * Parses a date, returning the number of milliseconds since epoch. This can be | |
285a6bda DV |
2499 | * passed in as an xValueParser in the Dygraph constructor. |
2500 | * TODO(danvk): enumerate formats that this understands. | |
6a1aa64f DV |
2501 | * @param {String} A date in YYYYMMDD format. |
2502 | * @return {Number} Milliseconds since epoch. | |
2503 | * @public | |
2504 | */ | |
285a6bda | 2505 | Dygraph.dateParser = function(dateStr, self) { |
6a1aa64f | 2506 | var dateStrSlashed; |
285a6bda | 2507 | var d; |
986a5026 | 2508 | if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12' |
6a1aa64f | 2509 | dateStrSlashed = dateStr.replace("-", "/", "g"); |
353a0294 DV |
2510 | while (dateStrSlashed.search("-") != -1) { |
2511 | dateStrSlashed = dateStrSlashed.replace("-", "/"); | |
2512 | } | |
285a6bda | 2513 | d = Date.parse(dateStrSlashed); |
2769de62 | 2514 | } else if (dateStr.length == 8) { // e.g. '20090712' |
285a6bda | 2515 | // TODO(danvk): remove support for this format. It's confusing. |
6a1aa64f DV |
2516 | dateStrSlashed = dateStr.substr(0,4) + "/" + dateStr.substr(4,2) |
2517 | + "/" + dateStr.substr(6,2); | |
285a6bda | 2518 | d = Date.parse(dateStrSlashed); |
2769de62 DV |
2519 | } else { |
2520 | // Any format that Date.parse will accept, e.g. "2009/07/12" or | |
2521 | // "2009/07/12 12:34:56" | |
285a6bda DV |
2522 | d = Date.parse(dateStr); |
2523 | } | |
2524 | ||
2525 | if (!d || isNaN(d)) { | |
2526 | self.error("Couldn't parse " + dateStr + " as a date"); | |
2527 | } | |
2528 | return d; | |
2529 | }; | |
2530 | ||
2531 | /** | |
2532 | * Detects the type of the str (date or numeric) and sets the various | |
2533 | * formatting attributes in this.attrs_ based on this type. | |
2534 | * @param {String} str An x value. | |
2535 | * @private | |
2536 | */ | |
2537 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
2538 | var isDate = false; | |
2539 | if (str.indexOf('-') >= 0 || | |
2540 | str.indexOf('/') >= 0 || | |
2541 | isNaN(parseFloat(str))) { | |
2542 | isDate = true; | |
2543 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
2544 | // TODO(danvk): remove support for this format. | |
2545 | isDate = true; | |
2546 | } | |
2547 | ||
2548 | if (isDate) { | |
2549 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
2550 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2551 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2552 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda | 2553 | } else { |
6be8e54c | 2554 | this.attrs_.xValueFormatter = this.attrs_.yValueFormatter; |
285a6bda DV |
2555 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
2556 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2557 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
6a1aa64f | 2558 | } |
6a1aa64f DV |
2559 | }; |
2560 | ||
2561 | /** | |
2562 | * Parses a string in a special csv format. We expect a csv file where each | |
2563 | * line is a date point, and the first field in each line is the date string. | |
2564 | * We also expect that all remaining fields represent series. | |
285a6bda | 2565 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f DV |
2566 | * date, series1, stddev1, series2, stddev2, ... |
2567 | * @param {Array.<Object>} data See above. | |
2568 | * @private | |
285a6bda DV |
2569 | * |
2570 | * @return Array.<Object> An array with one entry for each row. These entries | |
2571 | * are an array of cells in that row. The first entry is the parsed x-value for | |
2572 | * the row. The second, third, etc. are the y-values. These can take on one of | |
2573 | * three forms, depending on the CSV and constructor parameters: | |
2574 | * 1. numeric value | |
2575 | * 2. [ value, stddev ] | |
2576 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 2577 | */ |
285a6bda | 2578 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f DV |
2579 | var ret = []; |
2580 | var lines = data.split("\n"); | |
3d67f03b DV |
2581 | |
2582 | // Use the default delimiter or fall back to a tab if that makes sense. | |
2583 | var delim = this.attr_('delimiter'); | |
2584 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { | |
2585 | delim = '\t'; | |
2586 | } | |
2587 | ||
285a6bda | 2588 | var start = 0; |
6a1aa64f | 2589 | if (this.labelsFromCSV_) { |
285a6bda | 2590 | start = 1; |
3d67f03b | 2591 | this.attrs_.labels = lines[0].split(delim); |
6a1aa64f DV |
2592 | } |
2593 | ||
03b522a4 DV |
2594 | // Parse the x as a float or return null if it's not a number. |
2595 | var parseFloatOrNull = function(x) { | |
41333ec0 | 2596 | var val = parseFloat(x); |
1f7f664b DV |
2597 | // isFinite() returns false for NaN and +/-Infinity. |
2598 | return isFinite(val) ? val : null; | |
03b522a4 DV |
2599 | }; |
2600 | ||
285a6bda DV |
2601 | var xParser; |
2602 | var defaultParserSet = false; // attempt to auto-detect x value type | |
2603 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 2604 | var outOfOrder = false; |
6a1aa64f DV |
2605 | for (var i = start; i < lines.length; i++) { |
2606 | var line = lines[i]; | |
2607 | if (line.length == 0) continue; // skip blank lines | |
3d67f03b DV |
2608 | if (line[0] == '#') continue; // skip comment lines |
2609 | var inFields = line.split(delim); | |
285a6bda | 2610 | if (inFields.length < 2) continue; |
6a1aa64f DV |
2611 | |
2612 | var fields = []; | |
285a6bda DV |
2613 | if (!defaultParserSet) { |
2614 | this.detectTypeFromString_(inFields[0]); | |
2615 | xParser = this.attr_("xValueParser"); | |
2616 | defaultParserSet = true; | |
2617 | } | |
2618 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
2619 | |
2620 | // If fractions are expected, parse the numbers as "A/B" | |
2621 | if (this.fractions_) { | |
2622 | for (var j = 1; j < inFields.length; j++) { | |
2623 | // TODO(danvk): figure out an appropriate way to flag parse errors. | |
2624 | var vals = inFields[j].split("/"); | |
03b522a4 | 2625 | fields[j] = [parseFloatOrNull(vals[0]), parseFloatOrNull(vals[1])]; |
6a1aa64f | 2626 | } |
285a6bda | 2627 | } else if (this.attr_("errorBars")) { |
6a1aa64f DV |
2628 | // If there are error bars, values are (value, stddev) pairs |
2629 | for (var j = 1; j < inFields.length; j += 2) | |
03b522a4 DV |
2630 | fields[(j + 1) / 2] = [parseFloatOrNull(inFields[j]), |
2631 | parseFloatOrNull(inFields[j + 1])]; | |
9922b78b | 2632 | } else if (this.attr_("customBars")) { |
6a1aa64f DV |
2633 | // Bars are a low;center;high tuple |
2634 | for (var j = 1; j < inFields.length; j++) { | |
2635 | var vals = inFields[j].split(";"); | |
03b522a4 DV |
2636 | fields[j] = [ parseFloatOrNull(vals[0]), |
2637 | parseFloatOrNull(vals[1]), | |
2638 | parseFloatOrNull(vals[2]) ]; | |
6a1aa64f DV |
2639 | } |
2640 | } else { | |
2641 | // Values are just numbers | |
285a6bda | 2642 | for (var j = 1; j < inFields.length; j++) { |
03b522a4 | 2643 | fields[j] = parseFloatOrNull(inFields[j]); |
285a6bda | 2644 | } |
6a1aa64f | 2645 | } |
987840a2 DV |
2646 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
2647 | outOfOrder = true; | |
2648 | } | |
6a1aa64f | 2649 | ret.push(fields); |
285a6bda DV |
2650 | |
2651 | if (fields.length != expectedCols) { | |
2652 | this.error("Number of columns in line " + i + " (" + fields.length + | |
2653 | ") does not agree with number of labels (" + expectedCols + | |
2654 | ") " + line); | |
2655 | } | |
6a1aa64f | 2656 | } |
987840a2 DV |
2657 | |
2658 | if (outOfOrder) { | |
2659 | this.warn("CSV is out of order; order it correctly to speed loading."); | |
2660 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2661 | } | |
2662 | ||
6a1aa64f DV |
2663 | return ret; |
2664 | }; | |
2665 | ||
2666 | /** | |
285a6bda DV |
2667 | * The user has provided their data as a pre-packaged JS array. If the x values |
2668 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
2669 | * are dates, we need to convert them from Date objects to ms since epoch. | |
2670 | * @param {Array.<Object>} data | |
2671 | * @return {Array.<Object>} data with numeric x values. | |
2672 | */ | |
2673 | Dygraph.prototype.parseArray_ = function(data) { | |
2674 | // Peek at the first x value to see if it's numeric. | |
2675 | if (data.length == 0) { | |
2676 | this.error("Can't plot empty data set"); | |
2677 | return null; | |
2678 | } | |
2679 | if (data[0].length == 0) { | |
2680 | this.error("Data set cannot contain an empty row"); | |
2681 | return null; | |
2682 | } | |
2683 | ||
2684 | if (this.attr_("labels") == null) { | |
2685 | this.warn("Using default labels. Set labels explicitly via 'labels' " + | |
2686 | "in the options parameter"); | |
2687 | this.attrs_.labels = [ "X" ]; | |
2688 | for (var i = 1; i < data[0].length; i++) { | |
2689 | this.attrs_.labels.push("Y" + i); | |
2690 | } | |
2691 | } | |
2692 | ||
2dda3850 | 2693 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda DV |
2694 | // Some intelligent defaults for a date x-axis. |
2695 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
bf640e56 | 2696 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
2697 | this.attrs_.xTicker = Dygraph.dateTicker; |
2698 | ||
2699 | // Assume they're all dates. | |
e3ab7b40 | 2700 | var parsedData = Dygraph.clone(data); |
285a6bda DV |
2701 | for (var i = 0; i < data.length; i++) { |
2702 | if (parsedData[i].length == 0) { | |
a323ff4a | 2703 | this.error("Row " + (1 + i) + " of data is empty"); |
285a6bda DV |
2704 | return null; |
2705 | } | |
2706 | if (parsedData[i][0] == null | |
3a909ec5 DV |
2707 | || typeof(parsedData[i][0].getTime) != 'function' |
2708 | || isNaN(parsedData[i][0].getTime())) { | |
be96a1f5 | 2709 | this.error("x value in row " + (1 + i) + " is not a Date"); |
285a6bda DV |
2710 | return null; |
2711 | } | |
2712 | parsedData[i][0] = parsedData[i][0].getTime(); | |
2713 | } | |
2714 | return parsedData; | |
2715 | } else { | |
2716 | // Some intelligent defaults for a numeric x-axis. | |
6be8e54c | 2717 | this.attrs_.xValueFormatter = this.attrs_.yValueFormatter; |
285a6bda DV |
2718 | this.attrs_.xTicker = Dygraph.numericTicks; |
2719 | return data; | |
2720 | } | |
2721 | }; | |
2722 | ||
2723 | /** | |
79420a1e DV |
2724 | * Parses a DataTable object from gviz. |
2725 | * The data is expected to have a first column that is either a date or a | |
2726 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
2727 | * between this.xValueParser_ and the type of the first column, it will be | |
a685723c | 2728 | * fixed. Fills out rawData_. |
79420a1e DV |
2729 | * @param {Array.<Object>} data See above. |
2730 | * @private | |
2731 | */ | |
285a6bda | 2732 | Dygraph.prototype.parseDataTable_ = function(data) { |
79420a1e DV |
2733 | var cols = data.getNumberOfColumns(); |
2734 | var rows = data.getNumberOfRows(); | |
2735 | ||
d955e223 | 2736 | var indepType = data.getColumnType(0); |
4440f6c8 | 2737 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda DV |
2738 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
2739 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2740 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2741 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
33127159 | 2742 | } else if (indepType == 'number') { |
6be8e54c | 2743 | this.attrs_.xValueFormatter = this.attrs_.yValueFormatter; |
285a6bda DV |
2744 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
2745 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2746 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
285a6bda | 2747 | } else { |
987840a2 DV |
2748 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
2749 | "column 1 of DataTable input (Got '" + indepType + "')"); | |
79420a1e DV |
2750 | return null; |
2751 | } | |
2752 | ||
a685723c DV |
2753 | // Array of the column indices which contain data (and not annotations). |
2754 | var colIdx = []; | |
2755 | var annotationCols = {}; // data index -> [annotation cols] | |
2756 | var hasAnnotations = false; | |
2757 | for (var i = 1; i < cols; i++) { | |
2758 | var type = data.getColumnType(i); | |
2759 | if (type == 'number') { | |
2760 | colIdx.push(i); | |
2761 | } else if (type == 'string' && this.attr_('displayAnnotations')) { | |
2762 | // This is OK -- it's an annotation column. | |
2763 | var dataIdx = colIdx[colIdx.length - 1]; | |
2764 | if (!annotationCols.hasOwnProperty(dataIdx)) { | |
2765 | annotationCols[dataIdx] = [i]; | |
2766 | } else { | |
2767 | annotationCols[dataIdx].push(i); | |
2768 | } | |
2769 | hasAnnotations = true; | |
2770 | } else { | |
2771 | this.error("Only 'number' is supported as a dependent type with Gviz." + | |
2772 | " 'string' is only supported if displayAnnotations is true"); | |
2773 | } | |
2774 | } | |
2775 | ||
2776 | // Read column labels | |
2777 | // TODO(danvk): add support back for errorBars | |
2778 | var labels = [data.getColumnLabel(0)]; | |
2779 | for (var i = 0; i < colIdx.length; i++) { | |
2780 | labels.push(data.getColumnLabel(colIdx[i])); | |
f9348814 | 2781 | if (this.attr_("errorBars")) i += 1; |
a685723c DV |
2782 | } |
2783 | this.attrs_.labels = labels; | |
2784 | cols = labels.length; | |
2785 | ||
79420a1e | 2786 | var ret = []; |
987840a2 | 2787 | var outOfOrder = false; |
a685723c | 2788 | var annotations = []; |
79420a1e DV |
2789 | for (var i = 0; i < rows; i++) { |
2790 | var row = []; | |
debe4434 DV |
2791 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
2792 | data.getValue(i, 0) === null) { | |
129569a5 FD |
2793 | this.warn("Ignoring row " + i + |
2794 | " of DataTable because of undefined or null first column."); | |
debe4434 DV |
2795 | continue; |
2796 | } | |
2797 | ||
c21d2c2d | 2798 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
2799 | row.push(data.getValue(i, 0).getTime()); |
2800 | } else { | |
2801 | row.push(data.getValue(i, 0)); | |
2802 | } | |
3e3f84e4 | 2803 | if (!this.attr_("errorBars")) { |
a685723c DV |
2804 | for (var j = 0; j < colIdx.length; j++) { |
2805 | var col = colIdx[j]; | |
2806 | row.push(data.getValue(i, col)); | |
2807 | if (hasAnnotations && | |
2808 | annotationCols.hasOwnProperty(col) && | |
2809 | data.getValue(i, annotationCols[col][0]) != null) { | |
2810 | var ann = {}; | |
2811 | ann.series = data.getColumnLabel(col); | |
2812 | ann.xval = row[0]; | |
2813 | ann.shortText = String.fromCharCode(65 /* A */ + annotations.length) | |
2814 | ann.text = ''; | |
2815 | for (var k = 0; k < annotationCols[col].length; k++) { | |
2816 | if (k) ann.text += "\n"; | |
2817 | ann.text += data.getValue(i, annotationCols[col][k]); | |
2818 | } | |
2819 | annotations.push(ann); | |
2820 | } | |
3e3f84e4 DV |
2821 | } |
2822 | } else { | |
2823 | for (var j = 0; j < cols - 1; j++) { | |
2824 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); | |
2825 | } | |
79420a1e | 2826 | } |
987840a2 DV |
2827 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
2828 | outOfOrder = true; | |
2829 | } | |
1f7f664b DV |
2830 | |
2831 | // Strip out infinities, which give dygraphs problems later on. | |
2832 | for (var j = 0; j < row.length; j++) { | |
2833 | if (!isFinite(row[j])) row[j] = null; | |
2834 | } | |
243d96e8 | 2835 | ret.push(row); |
79420a1e | 2836 | } |
987840a2 DV |
2837 | |
2838 | if (outOfOrder) { | |
2839 | this.warn("DataTable is out of order; order it correctly to speed loading."); | |
2840 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2841 | } | |
a685723c DV |
2842 | this.rawData_ = ret; |
2843 | ||
2844 | if (annotations.length > 0) { | |
2845 | this.setAnnotations(annotations, true); | |
2846 | } | |
79420a1e DV |
2847 | } |
2848 | ||
24e5350c | 2849 | // These functions are all based on MochiKit. |
fc80a396 DV |
2850 | Dygraph.update = function (self, o) { |
2851 | if (typeof(o) != 'undefined' && o !== null) { | |
2852 | for (var k in o) { | |
85b99f0b DV |
2853 | if (o.hasOwnProperty(k)) { |
2854 | self[k] = o[k]; | |
2855 | } | |
fc80a396 DV |
2856 | } |
2857 | } | |
2858 | return self; | |
2859 | }; | |
2860 | ||
2dda3850 DV |
2861 | Dygraph.isArrayLike = function (o) { |
2862 | var typ = typeof(o); | |
2863 | if ( | |
c21d2c2d | 2864 | (typ != 'object' && !(typ == 'function' && |
2dda3850 DV |
2865 | typeof(o.item) == 'function')) || |
2866 | o === null || | |
2867 | typeof(o.length) != 'number' || | |
2868 | o.nodeType === 3 | |
2869 | ) { | |
2870 | return false; | |
2871 | } | |
2872 | return true; | |
2873 | }; | |
2874 | ||
2875 | Dygraph.isDateLike = function (o) { | |
2876 | if (typeof(o) != "object" || o === null || | |
2877 | typeof(o.getTime) != 'function') { | |
2878 | return false; | |
2879 | } | |
2880 | return true; | |
2881 | }; | |
2882 | ||
e3ab7b40 DV |
2883 | Dygraph.clone = function(o) { |
2884 | // TODO(danvk): figure out how MochiKit's version works | |
2885 | var r = []; | |
2886 | for (var i = 0; i < o.length; i++) { | |
2887 | if (Dygraph.isArrayLike(o[i])) { | |
2888 | r.push(Dygraph.clone(o[i])); | |
2889 | } else { | |
2890 | r.push(o[i]); | |
2891 | } | |
2892 | } | |
2893 | return r; | |
24e5350c DV |
2894 | }; |
2895 | ||
2dda3850 | 2896 | |
79420a1e | 2897 | /** |
6a1aa64f DV |
2898 | * Get the CSV data. If it's in a function, call that function. If it's in a |
2899 | * file, do an XMLHttpRequest to get it. | |
2900 | * @private | |
2901 | */ | |
285a6bda | 2902 | Dygraph.prototype.start_ = function() { |
6a1aa64f | 2903 | if (typeof this.file_ == 'function') { |
285a6bda | 2904 | // CSV string. Pretend we got it via XHR. |
6a1aa64f | 2905 | this.loadedEvent_(this.file_()); |
2dda3850 | 2906 | } else if (Dygraph.isArrayLike(this.file_)) { |
285a6bda | 2907 | this.rawData_ = this.parseArray_(this.file_); |
26ca7938 | 2908 | this.predraw_(); |
79420a1e DV |
2909 | } else if (typeof this.file_ == 'object' && |
2910 | typeof this.file_.getColumnRange == 'function') { | |
2911 | // must be a DataTable from gviz. | |
a685723c | 2912 | this.parseDataTable_(this.file_); |
26ca7938 | 2913 | this.predraw_(); |
285a6bda DV |
2914 | } else if (typeof this.file_ == 'string') { |
2915 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. | |
2916 | if (this.file_.indexOf('\n') >= 0) { | |
2917 | this.loadedEvent_(this.file_); | |
2918 | } else { | |
2919 | var req = new XMLHttpRequest(); | |
2920 | var caller = this; | |
2921 | req.onreadystatechange = function () { | |
2922 | if (req.readyState == 4) { | |
2923 | if (req.status == 200) { | |
2924 | caller.loadedEvent_(req.responseText); | |
2925 | } | |
6a1aa64f | 2926 | } |
285a6bda | 2927 | }; |
6a1aa64f | 2928 | |
285a6bda DV |
2929 | req.open("GET", this.file_, true); |
2930 | req.send(null); | |
2931 | } | |
2932 | } else { | |
2933 | this.error("Unknown data format: " + (typeof this.file_)); | |
6a1aa64f DV |
2934 | } |
2935 | }; | |
2936 | ||
2937 | /** | |
2938 | * Changes various properties of the graph. These can include: | |
2939 | * <ul> | |
2940 | * <li>file: changes the source data for the graph</li> | |
2941 | * <li>errorBars: changes whether the data contains stddev</li> | |
2942 | * </ul> | |
2943 | * @param {Object} attrs The new properties and values | |
2944 | */ | |
285a6bda DV |
2945 | Dygraph.prototype.updateOptions = function(attrs) { |
2946 | // TODO(danvk): this is a mess. Rethink this function. | |
c65f2303 | 2947 | if ('rollPeriod' in attrs) { |
6a1aa64f DV |
2948 | this.rollPeriod_ = attrs.rollPeriod; |
2949 | } | |
c65f2303 | 2950 | if ('dateWindow' in attrs) { |
6a1aa64f DV |
2951 | this.dateWindow_ = attrs.dateWindow; |
2952 | } | |
450fe64b DV |
2953 | |
2954 | // TODO(danvk): validate per-series options. | |
46dde5f9 DV |
2955 | // Supported: |
2956 | // strokeWidth | |
2957 | // pointSize | |
2958 | // drawPoints | |
2959 | // highlightCircleSize | |
450fe64b | 2960 | |
fc80a396 | 2961 | Dygraph.update(this.user_attrs_, attrs); |
87bb7958 | 2962 | Dygraph.update(this.renderOptions_, attrs); |
285a6bda DV |
2963 | |
2964 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
2965 | ||
2966 | // TODO(danvk): this doesn't match the constructor logic | |
2967 | this.layout_.updateOptions({ 'errorBars': this.attr_("errorBars") }); | |
5e50289f | 2968 | if (attrs['file']) { |
6a1aa64f DV |
2969 | this.file_ = attrs['file']; |
2970 | this.start_(); | |
2971 | } else { | |
26ca7938 | 2972 | this.predraw_(); |
6a1aa64f DV |
2973 | } |
2974 | }; | |
2975 | ||
2976 | /** | |
697e70b2 DV |
2977 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
2978 | * containing div (which has presumably changed size since the dygraph was | |
2979 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
2980 | * |
2981 | * This is far more efficient than destroying and re-instantiating a | |
2982 | * Dygraph, since it doesn't have to reparse the underlying data. | |
2983 | * | |
697e70b2 DV |
2984 | * @param {Number} width Width (in pixels) |
2985 | * @param {Number} height Height (in pixels) | |
2986 | */ | |
2987 | Dygraph.prototype.resize = function(width, height) { | |
e8c7ef86 DV |
2988 | if (this.resize_lock) { |
2989 | return; | |
2990 | } | |
2991 | this.resize_lock = true; | |
2992 | ||
697e70b2 DV |
2993 | if ((width === null) != (height === null)) { |
2994 | this.warn("Dygraph.resize() should be called with zero parameters or " + | |
2995 | "two non-NULL parameters. Pretending it was zero."); | |
2996 | width = height = null; | |
2997 | } | |
2998 | ||
b16e6369 | 2999 | // TODO(danvk): there should be a clear() method. |
697e70b2 | 3000 | this.maindiv_.innerHTML = ""; |
b16e6369 DV |
3001 | this.attrs_.labelsDiv = null; |
3002 | ||
697e70b2 DV |
3003 | if (width) { |
3004 | this.maindiv_.style.width = width + "px"; | |
3005 | this.maindiv_.style.height = height + "px"; | |
3006 | this.width_ = width; | |
3007 | this.height_ = height; | |
3008 | } else { | |
3009 | this.width_ = this.maindiv_.offsetWidth; | |
3010 | this.height_ = this.maindiv_.offsetHeight; | |
3011 | } | |
3012 | ||
3013 | this.createInterface_(); | |
26ca7938 | 3014 | this.predraw_(); |
e8c7ef86 DV |
3015 | |
3016 | this.resize_lock = false; | |
697e70b2 DV |
3017 | }; |
3018 | ||
3019 | /** | |
3c1d225b | 3020 | * Adjusts the number of points in the rolling average. Updates the graph to |
6a1aa64f | 3021 | * reflect the new averaging period. |
3c1d225b | 3022 | * @param {Number} length Number of points over which to average the data. |
6a1aa64f | 3023 | */ |
285a6bda | 3024 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f | 3025 | this.rollPeriod_ = length; |
26ca7938 | 3026 | this.predraw_(); |
6a1aa64f | 3027 | }; |
540d00f1 | 3028 | |
f8cfec73 | 3029 | /** |
1cf11047 DV |
3030 | * Returns a boolean array of visibility statuses. |
3031 | */ | |
3032 | Dygraph.prototype.visibility = function() { | |
3033 | // Do lazy-initialization, so that this happens after we know the number of | |
3034 | // data series. | |
3035 | if (!this.attr_("visibility")) { | |
f38dec01 | 3036 | this.attrs_["visibility"] = []; |
1cf11047 DV |
3037 | } |
3038 | while (this.attr_("visibility").length < this.rawData_[0].length - 1) { | |
f38dec01 | 3039 | this.attr_("visibility").push(true); |
1cf11047 DV |
3040 | } |
3041 | return this.attr_("visibility"); | |
3042 | }; | |
3043 | ||
3044 | /** | |
3045 | * Changes the visiblity of a series. | |
3046 | */ | |
3047 | Dygraph.prototype.setVisibility = function(num, value) { | |
3048 | var x = this.visibility(); | |
a6c109c1 | 3049 | if (num < 0 || num >= x.length) { |
1cf11047 DV |
3050 | this.warn("invalid series number in setVisibility: " + num); |
3051 | } else { | |
3052 | x[num] = value; | |
26ca7938 | 3053 | this.predraw_(); |
1cf11047 DV |
3054 | } |
3055 | }; | |
3056 | ||
3057 | /** | |
5c528fa2 DV |
3058 | * Update the list of annotations and redraw the chart. |
3059 | */ | |
a685723c | 3060 | Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { |
3c51ab74 DV |
3061 | // Only add the annotation CSS rule once we know it will be used. |
3062 | Dygraph.addAnnotationRule(); | |
5c528fa2 DV |
3063 | this.annotations_ = ann; |
3064 | this.layout_.setAnnotations(this.annotations_); | |
a685723c | 3065 | if (!suppressDraw) { |
26ca7938 | 3066 | this.predraw_(); |
a685723c | 3067 | } |
5c528fa2 DV |
3068 | }; |
3069 | ||
3070 | /** | |
3071 | * Return the list of annotations. | |
3072 | */ | |
3073 | Dygraph.prototype.annotations = function() { | |
3074 | return this.annotations_; | |
3075 | }; | |
3076 | ||
46dde5f9 DV |
3077 | /** |
3078 | * Get the index of a series (column) given its name. The first column is the | |
3079 | * x-axis, so the data series start with index 1. | |
3080 | */ | |
3081 | Dygraph.prototype.indexFromSetName = function(name) { | |
3082 | var labels = this.attr_("labels"); | |
3083 | for (var i = 0; i < labels.length; i++) { | |
3084 | if (labels[i] == name) return i; | |
3085 | } | |
3086 | return null; | |
3087 | }; | |
3088 | ||
5c528fa2 DV |
3089 | Dygraph.addAnnotationRule = function() { |
3090 | if (Dygraph.addedAnnotationCSS) return; | |
3091 | ||
5c528fa2 DV |
3092 | var rule = "border: 1px solid black; " + |
3093 | "background-color: white; " + | |
3094 | "text-align: center;"; | |
22186871 DV |
3095 | |
3096 | var styleSheetElement = document.createElement("style"); | |
3097 | styleSheetElement.type = "text/css"; | |
3098 | document.getElementsByTagName("head")[0].appendChild(styleSheetElement); | |
3099 | ||
3100 | // Find the first style sheet that we can access. | |
3101 | // We may not add a rule to a style sheet from another domain for security | |
3102 | // reasons. This sometimes comes up when using gviz, since the Google gviz JS | |
3103 | // adds its own style sheets from google.com. | |
3104 | for (var i = 0; i < document.styleSheets.length; i++) { | |
3105 | if (document.styleSheets[i].disabled) continue; | |
3106 | var mysheet = document.styleSheets[i]; | |
3107 | try { | |
3108 | if (mysheet.insertRule) { // Firefox | |
3109 | var idx = mysheet.cssRules ? mysheet.cssRules.length : 0; | |
3110 | mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", idx); | |
3111 | } else if (mysheet.addRule) { // IE | |
3112 | mysheet.addRule(".dygraphDefaultAnnotation", rule); | |
3113 | } | |
3114 | Dygraph.addedAnnotationCSS = true; | |
3115 | return; | |
3116 | } catch(err) { | |
3117 | // Was likely a security exception. | |
3118 | } | |
5c528fa2 DV |
3119 | } |
3120 | ||
22186871 | 3121 | this.warn("Unable to add default annotation CSS rule; display may be off."); |
5c528fa2 DV |
3122 | } |
3123 | ||
3124 | /** | |
f8cfec73 DV |
3125 | * Create a new canvas element. This is more complex than a simple |
3126 | * document.createElement("canvas") because of IE and excanvas. | |
3127 | */ | |
3128 | Dygraph.createCanvas = function() { | |
3129 | var canvas = document.createElement("canvas"); | |
3130 | ||
3131 | isIE = (/MSIE/.test(navigator.userAgent) && !window.opera); | |
8b8f2d59 | 3132 | if (isIE && (typeof(G_vmlCanvasManager) != 'undefined')) { |
f8cfec73 DV |
3133 | canvas = G_vmlCanvasManager.initElement(canvas); |
3134 | } | |
3135 | ||
3136 | return canvas; | |
3137 | }; | |
3138 | ||
540d00f1 DV |
3139 | |
3140 | /** | |
285a6bda | 3141 | * A wrapper around Dygraph that implements the gviz API. |
540d00f1 DV |
3142 | * @param {Object} container The DOM object the visualization should live in. |
3143 | */ | |
285a6bda | 3144 | Dygraph.GVizChart = function(container) { |
540d00f1 DV |
3145 | this.container = container; |
3146 | } | |
3147 | ||
285a6bda | 3148 | Dygraph.GVizChart.prototype.draw = function(data, options) { |
c91f4ae8 DV |
3149 | // Clear out any existing dygraph. |
3150 | // TODO(danvk): would it make more sense to simply redraw using the current | |
3151 | // date_graph object? | |
540d00f1 | 3152 | this.container.innerHTML = ''; |
c91f4ae8 DV |
3153 | if (typeof(this.date_graph) != 'undefined') { |
3154 | this.date_graph.destroy(); | |
3155 | } | |
3156 | ||
285a6bda | 3157 | this.date_graph = new Dygraph(this.container, data, options); |
540d00f1 | 3158 | } |
285a6bda | 3159 | |
239c712d NAG |
3160 | /** |
3161 | * Google charts compatible setSelection | |
50360fd0 | 3162 | * Only row selection is supported, all points in the row will be highlighted |
239c712d NAG |
3163 | * @param {Array} array of the selected cells |
3164 | * @public | |
3165 | */ | |
3166 | Dygraph.GVizChart.prototype.setSelection = function(selection_array) { | |
3167 | var row = false; | |
3168 | if (selection_array.length) { | |
3169 | row = selection_array[0].row; | |
3170 | } | |
3171 | this.date_graph.setSelection(row); | |
3172 | } | |
3173 | ||
103b7292 NAG |
3174 | /** |
3175 | * Google charts compatible getSelection implementation | |
3176 | * @return {Array} array of the selected cells | |
3177 | * @public | |
3178 | */ | |
3179 | Dygraph.GVizChart.prototype.getSelection = function() { | |
3180 | var selection = []; | |
50360fd0 | 3181 | |
103b7292 | 3182 | var row = this.date_graph.getSelection(); |
50360fd0 | 3183 | |
103b7292 | 3184 | if (row < 0) return selection; |
50360fd0 | 3185 | |
103b7292 NAG |
3186 | col = 1; |
3187 | for (var i in this.date_graph.layout_.datasets) { | |
3188 | selection.push({row: row, column: col}); | |
3189 | col++; | |
3190 | } | |
3191 | ||
3192 | return selection; | |
3193 | } | |
3194 | ||
285a6bda DV |
3195 | // Older pages may still use this name. |
3196 | DateGraph = Dygraph; |