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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 | ||
285a6bda | 40 | For further documentation and examples, see http://www.danvk.org/dygraphs |
6a1aa64f DV |
41 | |
42 | */ | |
43 | ||
44 | /** | |
45 | * An interactive, zoomable graph | |
46 | * @param {String | Function} file A file containing CSV data or a function that | |
47 | * returns this data. The expected format for each line is | |
48 | * YYYYMMDD,val1,val2,... or, if attrs.errorBars is set, | |
49 | * YYYYMMDD,val1,stddev1,val2,stddev2,... | |
6a1aa64f DV |
50 | * @param {Object} attrs Various other attributes, e.g. errorBars determines |
51 | * whether the input data contains error ranges. | |
52 | */ | |
285a6bda DV |
53 | Dygraph = function(div, data, opts) { |
54 | if (arguments.length > 0) { | |
55 | if (arguments.length == 4) { | |
56 | // Old versions of dygraphs took in the series labels as a constructor | |
57 | // parameter. This doesn't make sense anymore, but it's easy to continue | |
58 | // to support this usage. | |
59 | this.warn("Using deprecated four-argument dygraph constructor"); | |
60 | this.__old_init__(div, data, arguments[2], arguments[3]); | |
61 | } else { | |
62 | this.__init__(div, data, opts); | |
63 | } | |
64 | } | |
6a1aa64f DV |
65 | }; |
66 | ||
285a6bda DV |
67 | Dygraph.NAME = "Dygraph"; |
68 | Dygraph.VERSION = "1.2"; | |
69 | Dygraph.__repr__ = function() { | |
6a1aa64f DV |
70 | return "[" + this.NAME + " " + this.VERSION + "]"; |
71 | }; | |
285a6bda | 72 | Dygraph.toString = function() { |
6a1aa64f DV |
73 | return this.__repr__(); |
74 | }; | |
75 | ||
76 | // Various default values | |
285a6bda DV |
77 | Dygraph.DEFAULT_ROLL_PERIOD = 1; |
78 | Dygraph.DEFAULT_WIDTH = 480; | |
79 | Dygraph.DEFAULT_HEIGHT = 320; | |
80 | Dygraph.AXIS_LINE_WIDTH = 0.3; | |
6a1aa64f | 81 | |
8e4a6af3 | 82 | // Default attribute values. |
285a6bda | 83 | Dygraph.DEFAULT_ATTRS = { |
a9fc39ab | 84 | highlightCircleSize: 3, |
8e4a6af3 | 85 | pixelsPerXLabel: 60, |
c6336f04 | 86 | pixelsPerYLabel: 30, |
285a6bda | 87 | |
8e4a6af3 DV |
88 | labelsDivWidth: 250, |
89 | labelsDivStyles: { | |
90 | // TODO(danvk): move defaults from createStatusMessage_ here. | |
285a6bda DV |
91 | }, |
92 | labelsSeparateLines: false, | |
bcd3ebf0 | 93 | labelsShowZeroValues: true, |
285a6bda | 94 | labelsKMB: false, |
afefbcdb | 95 | labelsKMG2: false, |
d160cc3b | 96 | showLabelsOnHighlight: true, |
12e4c741 | 97 | |
029da4b6 | 98 | yValueFormatter: function(x) { return Dygraph.round_(x, 2); }, |
285a6bda DV |
99 | |
100 | strokeWidth: 1.0, | |
8e4a6af3 | 101 | |
8846615a DV |
102 | axisTickSize: 3, |
103 | axisLabelFontSize: 14, | |
104 | xAxisLabelWidth: 50, | |
105 | yAxisLabelWidth: 50, | |
bf640e56 | 106 | xAxisLabelFormatter: Dygraph.dateAxisFormatter, |
8846615a | 107 | rightGap: 5, |
285a6bda DV |
108 | |
109 | showRoller: false, | |
110 | xValueFormatter: Dygraph.dateString_, | |
111 | xValueParser: Dygraph.dateParser, | |
112 | xTicker: Dygraph.dateTicker, | |
113 | ||
3d67f03b DV |
114 | delimiter: ',', |
115 | ||
ff00d3e2 | 116 | logScale: false, |
285a6bda DV |
117 | sigma: 2.0, |
118 | errorBars: false, | |
119 | fractions: false, | |
120 | wilsonInterval: true, // only relevant if fractions is true | |
5954ef32 | 121 | customBars: false, |
43af96e7 NK |
122 | fillGraph: false, |
123 | fillAlpha: 0.15, | |
f032c51d | 124 | connectSeparatedPoints: false, |
43af96e7 NK |
125 | |
126 | stackedGraph: false, | |
afdc483f NN |
127 | hideOverlayOnMouseOut: true, |
128 | ||
00c281d4 NN |
129 | stepPlot: false, |
130 | avoidMinZero: false | |
285a6bda DV |
131 | }; |
132 | ||
133 | // Various logging levels. | |
134 | Dygraph.DEBUG = 1; | |
135 | Dygraph.INFO = 2; | |
136 | Dygraph.WARNING = 3; | |
137 | Dygraph.ERROR = 3; | |
138 | ||
39b0e098 RK |
139 | // Directions for panning and zooming. Use bit operations when combined |
140 | // values are possible. | |
141 | Dygraph.HORIZONTAL = 1; | |
142 | Dygraph.VERTICAL = 2; | |
143 | ||
5c528fa2 DV |
144 | // Used for initializing annotation CSS rules only once. |
145 | Dygraph.addedAnnotationCSS = false; | |
146 | ||
285a6bda DV |
147 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { |
148 | // Labels is no longer a constructor parameter, since it's typically set | |
149 | // directly from the data source. It also conains a name for the x-axis, | |
150 | // which the previous constructor form did not. | |
151 | if (labels != null) { | |
152 | var new_labels = ["Date"]; | |
153 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); | |
fc80a396 | 154 | Dygraph.update(attrs, { 'labels': new_labels }); |
285a6bda DV |
155 | } |
156 | this.__init__(div, file, attrs); | |
8e4a6af3 DV |
157 | }; |
158 | ||
6a1aa64f | 159 | /** |
285a6bda | 160 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
6a1aa64f DV |
161 | * and interaction <canvas> inside of it. See the constructor for details |
162 | * on the parameters. | |
12e4c741 | 163 | * @param {Element} div the Element to render the graph into. |
6a1aa64f | 164 | * @param {String | Function} file Source data |
6a1aa64f DV |
165 | * @param {Object} attrs Miscellaneous other options |
166 | * @private | |
167 | */ | |
285a6bda DV |
168 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
169 | // Support two-argument constructor | |
170 | if (attrs == null) { attrs = {}; } | |
171 | ||
6a1aa64f | 172 | // Copy the important bits into the object |
32988383 | 173 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
6a1aa64f | 174 | this.maindiv_ = div; |
6a1aa64f | 175 | this.file_ = file; |
285a6bda | 176 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
6a1aa64f | 177 | this.previousVerticalX_ = -1; |
6a1aa64f | 178 | this.fractions_ = attrs.fractions || false; |
6a1aa64f | 179 | this.dateWindow_ = attrs.dateWindow || null; |
8b83c6cc | 180 | |
6a1aa64f | 181 | this.wilsonInterval_ = attrs.wilsonInterval || true; |
fe0b7c03 | 182 | this.is_initial_draw_ = true; |
5c528fa2 | 183 | this.annotations_ = []; |
8e4a6af3 | 184 | |
f7d6278e DV |
185 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
186 | // div, then only one will be drawn. | |
187 | div.innerHTML = ""; | |
188 | ||
c21d2c2d | 189 | // If the div isn't already sized then inherit from our attrs or |
190 | // give it a default size. | |
285a6bda | 191 | if (div.style.width == '') { |
ddd1b11f | 192 | div.style.width = (attrs.width || Dygraph.DEFAULT_WIDTH) + "px"; |
285a6bda DV |
193 | } |
194 | if (div.style.height == '') { | |
ddd1b11f | 195 | div.style.height = (attrs.height || Dygraph.DEFAULT_HEIGHT) + "px"; |
32988383 | 196 | } |
285a6bda DV |
197 | this.width_ = parseInt(div.style.width, 10); |
198 | this.height_ = parseInt(div.style.height, 10); | |
c21d2c2d | 199 | // The div might have been specified as percent of the current window size, |
200 | // convert that to an appropriate number of pixels. | |
201 | if (div.style.width.indexOf("%") == div.style.width.length - 1) { | |
c6f45033 | 202 | this.width_ = div.offsetWidth; |
c21d2c2d | 203 | } |
204 | if (div.style.height.indexOf("%") == div.style.height.length - 1) { | |
c6f45033 | 205 | this.height_ = div.offsetHeight; |
c21d2c2d | 206 | } |
32988383 | 207 | |
10a6456d DV |
208 | if (this.width_ == 0) { |
209 | this.error("dygraph has zero width. Please specify a width in pixels."); | |
210 | } | |
211 | if (this.height_ == 0) { | |
212 | this.error("dygraph has zero height. Please specify a height in pixels."); | |
213 | } | |
214 | ||
344ba8c0 | 215 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
43af96e7 NK |
216 | if (attrs['stackedGraph']) { |
217 | attrs['fillGraph'] = true; | |
218 | // TODO(nikhilk): Add any other stackedGraph checks here. | |
219 | } | |
220 | ||
285a6bda DV |
221 | // Dygraphs has many options, some of which interact with one another. |
222 | // To keep track of everything, we maintain two sets of options: | |
223 | // | |
c21d2c2d | 224 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
225 | // this.attrs_ defaults, options derived from user_attrs_, data. |
226 | // | |
227 | // Options are then accessed this.attr_('attr'), which first looks at | |
228 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
229 | // defaults without overriding behavior that the user specifically asks for. | |
230 | this.user_attrs_ = {}; | |
fc80a396 | 231 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 232 | |
285a6bda | 233 | this.attrs_ = {}; |
fc80a396 | 234 | Dygraph.update(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 235 | |
16269f6e | 236 | this.boundaryIds_ = []; |
6a1aa64f | 237 | |
285a6bda DV |
238 | // Make a note of whether labels will be pulled from the CSV file. |
239 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
6a1aa64f DV |
240 | |
241 | // Create the containing DIV and other interactive elements | |
242 | this.createInterface_(); | |
243 | ||
738fc797 | 244 | this.start_(); |
6a1aa64f DV |
245 | }; |
246 | ||
227b93cc DV |
247 | Dygraph.prototype.attr_ = function(name, seriesName) { |
248 | if (seriesName && | |
249 | typeof(this.user_attrs_[seriesName]) != 'undefined' && | |
250 | this.user_attrs_[seriesName] != null && | |
251 | typeof(this.user_attrs_[seriesName][name]) != 'undefined') { | |
252 | return this.user_attrs_[seriesName][name]; | |
450fe64b | 253 | } else if (typeof(this.user_attrs_[name]) != 'undefined') { |
285a6bda DV |
254 | return this.user_attrs_[name]; |
255 | } else if (typeof(this.attrs_[name]) != 'undefined') { | |
256 | return this.attrs_[name]; | |
257 | } else { | |
258 | return null; | |
259 | } | |
260 | }; | |
261 | ||
262 | // TODO(danvk): any way I can get the line numbers to be this.warn call? | |
263 | Dygraph.prototype.log = function(severity, message) { | |
264 | if (typeof(console) != 'undefined') { | |
265 | switch (severity) { | |
266 | case Dygraph.DEBUG: | |
267 | console.debug('dygraphs: ' + message); | |
268 | break; | |
269 | case Dygraph.INFO: | |
270 | console.info('dygraphs: ' + message); | |
271 | break; | |
272 | case Dygraph.WARNING: | |
273 | console.warn('dygraphs: ' + message); | |
274 | break; | |
275 | case Dygraph.ERROR: | |
276 | console.error('dygraphs: ' + message); | |
277 | break; | |
278 | } | |
279 | } | |
280 | } | |
281 | Dygraph.prototype.info = function(message) { | |
282 | this.log(Dygraph.INFO, message); | |
283 | } | |
284 | Dygraph.prototype.warn = function(message) { | |
285 | this.log(Dygraph.WARNING, message); | |
286 | } | |
287 | Dygraph.prototype.error = function(message) { | |
288 | this.log(Dygraph.ERROR, message); | |
289 | } | |
290 | ||
6a1aa64f DV |
291 | /** |
292 | * Returns the current rolling period, as set by the user or an option. | |
293 | * @return {Number} The number of days in the rolling window | |
294 | */ | |
285a6bda | 295 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 296 | return this.rollPeriod_; |
76171648 DV |
297 | }; |
298 | ||
599fb4ad DV |
299 | /** |
300 | * Returns the currently-visible x-range. This can be affected by zooming, | |
301 | * panning or a call to updateOptions. | |
302 | * Returns a two-element array: [left, right]. | |
303 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
304 | */ | |
305 | Dygraph.prototype.xAxisRange = function() { | |
306 | if (this.dateWindow_) return this.dateWindow_; | |
307 | ||
308 | // The entire chart is visible. | |
309 | var left = this.rawData_[0][0]; | |
310 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
311 | return [left, right]; | |
312 | }; | |
313 | ||
3230c662 | 314 | /** |
d58ae307 DV |
315 | * Returns the currently-visible y-range for an axis. This can be affected by |
316 | * zooming, panning or a call to updateOptions. Axis indices are zero-based. If | |
317 | * called with no arguments, returns the range of the first axis. | |
3230c662 DV |
318 | * Returns a two-element array: [bottom, top]. |
319 | */ | |
d58ae307 | 320 | Dygraph.prototype.yAxisRange = function(idx) { |
d63e6799 | 321 | if (typeof(idx) == "undefined") idx = 0; |
d58ae307 DV |
322 | if (idx < 0 || idx >= this.axes_.length) return null; |
323 | return [ this.axes_[idx].computedValueRange[0], | |
324 | this.axes_[idx].computedValueRange[1] ]; | |
325 | }; | |
326 | ||
327 | /** | |
328 | * Returns the currently-visible y-ranges for each axis. This can be affected by | |
329 | * zooming, panning, calls to updateOptions, etc. | |
330 | * Returns an array of [bottom, top] pairs, one for each y-axis. | |
331 | */ | |
332 | Dygraph.prototype.yAxisRanges = function() { | |
333 | var ret = []; | |
334 | for (var i = 0; i < this.axes_.length; i++) { | |
335 | ret.push(this.yAxisRange(i)); | |
336 | } | |
337 | return ret; | |
3230c662 DV |
338 | }; |
339 | ||
d58ae307 | 340 | // TODO(danvk): use these functions throughout dygraphs. |
3230c662 DV |
341 | /** |
342 | * Convert from data coordinates to canvas/div X/Y coordinates. | |
d58ae307 DV |
343 | * If specified, do this conversion for the coordinate system of a particular |
344 | * axis. Uses the first axis by default. | |
3230c662 DV |
345 | * Returns a two-element array: [X, Y] |
346 | */ | |
d58ae307 | 347 | Dygraph.prototype.toDomCoords = function(x, y, axis) { |
3230c662 DV |
348 | var ret = [null, null]; |
349 | var area = this.plotter_.area; | |
350 | if (x !== null) { | |
351 | var xRange = this.xAxisRange(); | |
352 | ret[0] = area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; | |
353 | } | |
354 | ||
355 | if (y !== null) { | |
d58ae307 | 356 | var yRange = this.yAxisRange(axis); |
891ad846 | 357 | ret[1] = area.y + (yRange[1] - y) / (yRange[1] - yRange[0]) * area.h; |
3230c662 DV |
358 | } |
359 | ||
360 | return ret; | |
361 | }; | |
362 | ||
363 | /** | |
364 | * Convert from canvas/div coords to data coordinates. | |
d58ae307 DV |
365 | * If specified, do this conversion for the coordinate system of a particular |
366 | * axis. Uses the first axis by default. | |
3230c662 DV |
367 | * Returns a two-element array: [X, Y] |
368 | */ | |
d58ae307 | 369 | Dygraph.prototype.toDataCoords = function(x, y, axis) { |
3230c662 DV |
370 | var ret = [null, null]; |
371 | var area = this.plotter_.area; | |
372 | if (x !== null) { | |
373 | var xRange = this.xAxisRange(); | |
374 | ret[0] = xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); | |
375 | } | |
376 | ||
377 | if (y !== null) { | |
d58ae307 | 378 | var yRange = this.yAxisRange(axis); |
3230c662 DV |
379 | ret[1] = yRange[0] + (area.h - y) / area.h * (yRange[1] - yRange[0]); |
380 | } | |
381 | ||
382 | return ret; | |
383 | }; | |
384 | ||
e99fde05 DV |
385 | /** |
386 | * Returns the number of columns (including the independent variable). | |
387 | */ | |
388 | Dygraph.prototype.numColumns = function() { | |
389 | return this.rawData_[0].length; | |
390 | }; | |
391 | ||
392 | /** | |
393 | * Returns the number of rows (excluding any header/label row). | |
394 | */ | |
395 | Dygraph.prototype.numRows = function() { | |
396 | return this.rawData_.length; | |
397 | }; | |
398 | ||
399 | /** | |
400 | * Returns the value in the given row and column. If the row and column exceed | |
401 | * the bounds on the data, returns null. Also returns null if the value is | |
402 | * missing. | |
403 | */ | |
404 | Dygraph.prototype.getValue = function(row, col) { | |
405 | if (row < 0 || row > this.rawData_.length) return null; | |
406 | if (col < 0 || col > this.rawData_[row].length) return null; | |
407 | ||
408 | return this.rawData_[row][col]; | |
409 | }; | |
410 | ||
76171648 DV |
411 | Dygraph.addEvent = function(el, evt, fn) { |
412 | var normed_fn = function(e) { | |
413 | if (!e) var e = window.event; | |
414 | fn(e); | |
415 | }; | |
416 | if (window.addEventListener) { // Mozilla, Netscape, Firefox | |
417 | el.addEventListener(evt, normed_fn, false); | |
418 | } else { // IE | |
419 | el.attachEvent('on' + evt, normed_fn); | |
420 | } | |
421 | }; | |
6a1aa64f DV |
422 | |
423 | /** | |
285a6bda | 424 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 425 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 426 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
427 | * @private |
428 | */ | |
285a6bda | 429 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
430 | // Create the all-enclosing graph div |
431 | var enclosing = this.maindiv_; | |
432 | ||
b0c3b730 DV |
433 | this.graphDiv = document.createElement("div"); |
434 | this.graphDiv.style.width = this.width_ + "px"; | |
435 | this.graphDiv.style.height = this.height_ + "px"; | |
436 | enclosing.appendChild(this.graphDiv); | |
437 | ||
438 | // Create the canvas for interactive parts of the chart. | |
f8cfec73 | 439 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 DV |
440 | this.canvas_.style.position = "absolute"; |
441 | this.canvas_.width = this.width_; | |
442 | this.canvas_.height = this.height_; | |
f8cfec73 DV |
443 | this.canvas_.style.width = this.width_ + "px"; // for IE |
444 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
b0c3b730 DV |
445 | |
446 | // ... and for static parts of the chart. | |
6a1aa64f | 447 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
76171648 | 448 | |
eb7bf005 EC |
449 | // The interactive parts of the graph are drawn on top of the chart. |
450 | this.graphDiv.appendChild(this.hidden_); | |
451 | this.graphDiv.appendChild(this.canvas_); | |
452 | this.mouseEventElement_ = this.canvas_; | |
453 | ||
76171648 | 454 | var dygraph = this; |
eb7bf005 | 455 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(e) { |
76171648 DV |
456 | dygraph.mouseMove_(e); |
457 | }); | |
eb7bf005 | 458 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(e) { |
76171648 DV |
459 | dygraph.mouseOut_(e); |
460 | }); | |
697e70b2 DV |
461 | |
462 | // Create the grapher | |
463 | // TODO(danvk): why does the Layout need its own set of options? | |
464 | this.layoutOptions_ = { 'xOriginIsZero': false }; | |
465 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
466 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
467 | Dygraph.update(this.layoutOptions_, { | |
468 | 'errorBars': (this.attr_("errorBars") || this.attr_("customBars")) }); | |
469 | ||
470 | this.layout_ = new DygraphLayout(this, this.layoutOptions_); | |
471 | ||
472 | // TODO(danvk): why does the Renderer need its own set of options? | |
473 | this.renderOptions_ = { colorScheme: this.colors_, | |
474 | strokeColor: null, | |
475 | axisLineWidth: Dygraph.AXIS_LINE_WIDTH }; | |
476 | Dygraph.update(this.renderOptions_, this.attrs_); | |
477 | Dygraph.update(this.renderOptions_, this.user_attrs_); | |
697e70b2 DV |
478 | |
479 | this.createStatusMessage_(); | |
697e70b2 | 480 | this.createDragInterface_(); |
4cfcc38c DV |
481 | }; |
482 | ||
483 | /** | |
484 | * Detach DOM elements in the dygraph and null out all data references. | |
485 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
486 | * usage. See, e.g., the tests/perf.html example. | |
487 | */ | |
488 | Dygraph.prototype.destroy = function() { | |
489 | var removeRecursive = function(node) { | |
490 | while (node.hasChildNodes()) { | |
491 | removeRecursive(node.firstChild); | |
492 | node.removeChild(node.firstChild); | |
493 | } | |
494 | }; | |
495 | removeRecursive(this.maindiv_); | |
496 | ||
497 | var nullOut = function(obj) { | |
498 | for (var n in obj) { | |
499 | if (typeof(obj[n]) === 'object') { | |
500 | obj[n] = null; | |
501 | } | |
502 | } | |
503 | }; | |
504 | ||
505 | // These may not all be necessary, but it can't hurt... | |
506 | nullOut(this.layout_); | |
507 | nullOut(this.plotter_); | |
508 | nullOut(this); | |
509 | }; | |
6a1aa64f DV |
510 | |
511 | /** | |
512 | * Creates the canvas containing the PlotKit graph. Only plotkit ever draws on | |
285a6bda | 513 | * this particular canvas. All Dygraph work is done on this.canvas_. |
8846615a | 514 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
515 | * @return {Object} The newly-created canvas |
516 | * @private | |
517 | */ | |
285a6bda | 518 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 | 519 | var h = Dygraph.createCanvas(); |
6a1aa64f | 520 | h.style.position = "absolute"; |
9ac5e4ae DV |
521 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
522 | // some extra area to make it easier to zoom in on the far left and far | |
523 | // right. h needs to be precisely the plot area, so that clipping occurs. | |
6a1aa64f DV |
524 | h.style.top = canvas.style.top; |
525 | h.style.left = canvas.style.left; | |
526 | h.width = this.width_; | |
527 | h.height = this.height_; | |
f8cfec73 DV |
528 | h.style.width = this.width_ + "px"; // for IE |
529 | h.style.height = this.height_ + "px"; // for IE | |
6a1aa64f DV |
530 | return h; |
531 | }; | |
532 | ||
f474c2a3 DV |
533 | // Taken from MochiKit.Color |
534 | Dygraph.hsvToRGB = function (hue, saturation, value) { | |
535 | var red; | |
536 | var green; | |
537 | var blue; | |
538 | if (saturation === 0) { | |
539 | red = value; | |
540 | green = value; | |
541 | blue = value; | |
542 | } else { | |
543 | var i = Math.floor(hue * 6); | |
544 | var f = (hue * 6) - i; | |
545 | var p = value * (1 - saturation); | |
546 | var q = value * (1 - (saturation * f)); | |
547 | var t = value * (1 - (saturation * (1 - f))); | |
548 | switch (i) { | |
549 | case 1: red = q; green = value; blue = p; break; | |
550 | case 2: red = p; green = value; blue = t; break; | |
551 | case 3: red = p; green = q; blue = value; break; | |
552 | case 4: red = t; green = p; blue = value; break; | |
553 | case 5: red = value; green = p; blue = q; break; | |
554 | case 6: // fall through | |
555 | case 0: red = value; green = t; blue = p; break; | |
556 | } | |
557 | } | |
558 | red = Math.floor(255 * red + 0.5); | |
559 | green = Math.floor(255 * green + 0.5); | |
560 | blue = Math.floor(255 * blue + 0.5); | |
561 | return 'rgb(' + red + ',' + green + ',' + blue + ')'; | |
562 | }; | |
563 | ||
564 | ||
6a1aa64f DV |
565 | /** |
566 | * Generate a set of distinct colors for the data series. This is done with a | |
567 | * color wheel. Saturation/Value are customizable, and the hue is | |
568 | * equally-spaced around the color wheel. If a custom set of colors is | |
569 | * specified, that is used instead. | |
6a1aa64f DV |
570 | * @private |
571 | */ | |
285a6bda DV |
572 | Dygraph.prototype.setColors_ = function() { |
573 | // TODO(danvk): compute this directly into this.attrs_['colorScheme'] and do | |
574 | // away with this.renderOptions_. | |
575 | var num = this.attr_("labels").length - 1; | |
6a1aa64f | 576 | this.colors_ = []; |
285a6bda DV |
577 | var colors = this.attr_('colors'); |
578 | if (!colors) { | |
579 | var sat = this.attr_('colorSaturation') || 1.0; | |
580 | var val = this.attr_('colorValue') || 0.5; | |
2aa21213 | 581 | var half = Math.ceil(num / 2); |
6a1aa64f | 582 | for (var i = 1; i <= num; i++) { |
ec1959eb | 583 | if (!this.visibility()[i-1]) continue; |
43af96e7 | 584 | // alternate colors for high contrast. |
2aa21213 | 585 | var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2); |
43af96e7 NK |
586 | var hue = (1.0 * idx/ (1 + num)); |
587 | this.colors_.push(Dygraph.hsvToRGB(hue, sat, val)); | |
6a1aa64f DV |
588 | } |
589 | } else { | |
590 | for (var i = 0; i < num; i++) { | |
ec1959eb | 591 | if (!this.visibility()[i]) continue; |
285a6bda | 592 | var colorStr = colors[i % colors.length]; |
f474c2a3 | 593 | this.colors_.push(colorStr); |
6a1aa64f DV |
594 | } |
595 | } | |
285a6bda | 596 | |
c21d2c2d | 597 | // TODO(danvk): update this w/r/t/ the new options system. |
285a6bda | 598 | this.renderOptions_.colorScheme = this.colors_; |
fc80a396 DV |
599 | Dygraph.update(this.plotter_.options, this.renderOptions_); |
600 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
601 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
6a1aa64f DV |
602 | } |
603 | ||
43af96e7 NK |
604 | /** |
605 | * Return the list of colors. This is either the list of colors passed in the | |
606 | * attributes, or the autogenerated list of rgb(r,g,b) strings. | |
607 | * @return {Array<string>} The list of colors. | |
608 | */ | |
609 | Dygraph.prototype.getColors = function() { | |
610 | return this.colors_; | |
611 | }; | |
612 | ||
5e60386d DV |
613 | // The following functions are from quirksmode.org with a modification for Safari from |
614 | // http://blog.firetree.net/2005/07/04/javascript-find-position/ | |
3df0ccf0 DV |
615 | // http://www.quirksmode.org/js/findpos.html |
616 | Dygraph.findPosX = function(obj) { | |
617 | var curleft = 0; | |
5e60386d | 618 | if(obj.offsetParent) |
50360fd0 | 619 | while(1) |
5e60386d | 620 | { |
3df0ccf0 | 621 | curleft += obj.offsetLeft; |
5e60386d DV |
622 | if(!obj.offsetParent) |
623 | break; | |
3df0ccf0 DV |
624 | obj = obj.offsetParent; |
625 | } | |
5e60386d | 626 | else if(obj.x) |
3df0ccf0 DV |
627 | curleft += obj.x; |
628 | return curleft; | |
629 | }; | |
c21d2c2d | 630 | |
3df0ccf0 DV |
631 | Dygraph.findPosY = function(obj) { |
632 | var curtop = 0; | |
5e60386d DV |
633 | if(obj.offsetParent) |
634 | while(1) | |
635 | { | |
3df0ccf0 | 636 | curtop += obj.offsetTop; |
5e60386d DV |
637 | if(!obj.offsetParent) |
638 | break; | |
3df0ccf0 DV |
639 | obj = obj.offsetParent; |
640 | } | |
5e60386d | 641 | else if(obj.y) |
3df0ccf0 DV |
642 | curtop += obj.y; |
643 | return curtop; | |
644 | }; | |
645 | ||
5e60386d | 646 | |
71a11a8e | 647 | |
6a1aa64f DV |
648 | /** |
649 | * Create the div that contains information on the selected point(s) | |
650 | * This goes in the top right of the canvas, unless an external div has already | |
651 | * been specified. | |
652 | * @private | |
653 | */ | |
fedbd797 | 654 | Dygraph.prototype.createStatusMessage_ = function() { |
655 | var userLabelsDiv = this.user_attrs_["labelsDiv"]; | |
656 | if (userLabelsDiv && null != userLabelsDiv | |
657 | && (typeof(userLabelsDiv) == "string" || userLabelsDiv instanceof String)) { | |
658 | this.user_attrs_["labelsDiv"] = document.getElementById(userLabelsDiv); | |
659 | } | |
285a6bda DV |
660 | if (!this.attr_("labelsDiv")) { |
661 | var divWidth = this.attr_('labelsDivWidth'); | |
b0c3b730 | 662 | var messagestyle = { |
6a1aa64f DV |
663 | "position": "absolute", |
664 | "fontSize": "14px", | |
665 | "zIndex": 10, | |
666 | "width": divWidth + "px", | |
667 | "top": "0px", | |
8846615a | 668 | "left": (this.width_ - divWidth - 2) + "px", |
6a1aa64f DV |
669 | "background": "white", |
670 | "textAlign": "left", | |
b0c3b730 | 671 | "overflow": "hidden"}; |
fc80a396 | 672 | Dygraph.update(messagestyle, this.attr_('labelsDivStyles')); |
b0c3b730 DV |
673 | var div = document.createElement("div"); |
674 | for (var name in messagestyle) { | |
85b99f0b DV |
675 | if (messagestyle.hasOwnProperty(name)) { |
676 | div.style[name] = messagestyle[name]; | |
677 | } | |
b0c3b730 DV |
678 | } |
679 | this.graphDiv.appendChild(div); | |
285a6bda | 680 | this.attrs_.labelsDiv = div; |
6a1aa64f DV |
681 | } |
682 | }; | |
683 | ||
684 | /** | |
0abfbd7e DV |
685 | * Position the labels div so that its right edge is flush with the right edge |
686 | * of the charting area. | |
687 | */ | |
688 | Dygraph.prototype.positionLabelsDiv_ = function() { | |
689 | // Don't touch a user-specified labelsDiv. | |
690 | if (this.user_attrs_.hasOwnProperty("labelsDiv")) return; | |
691 | ||
692 | var area = this.plotter_.area; | |
693 | var div = this.attr_("labelsDiv"); | |
8c21adcf | 694 | div.style.left = area.x + area.w - this.attr_("labelsDivWidth") - 1 + "px"; |
0abfbd7e DV |
695 | }; |
696 | ||
697 | /** | |
6a1aa64f | 698 | * Create the text box to adjust the averaging period |
6a1aa64f DV |
699 | * @private |
700 | */ | |
285a6bda | 701 | Dygraph.prototype.createRollInterface_ = function() { |
8c69de65 DV |
702 | // Create a roller if one doesn't exist already. |
703 | if (!this.roller_) { | |
704 | this.roller_ = document.createElement("input"); | |
705 | this.roller_.type = "text"; | |
706 | this.roller_.style.display = "none"; | |
707 | this.graphDiv.appendChild(this.roller_); | |
708 | } | |
709 | ||
710 | var display = this.attr_('showRoller') ? 'block' : 'none'; | |
26ca7938 | 711 | |
b0c3b730 DV |
712 | var textAttr = { "position": "absolute", |
713 | "zIndex": 10, | |
714 | "top": (this.plotter_.area.h - 25) + "px", | |
715 | "left": (this.plotter_.area.x + 1) + "px", | |
716 | "display": display | |
6a1aa64f | 717 | }; |
8c69de65 DV |
718 | this.roller_.size = "2"; |
719 | this.roller_.value = this.rollPeriod_; | |
b0c3b730 | 720 | for (var name in textAttr) { |
85b99f0b | 721 | if (textAttr.hasOwnProperty(name)) { |
8c69de65 | 722 | this.roller_.style[name] = textAttr[name]; |
85b99f0b | 723 | } |
b0c3b730 DV |
724 | } |
725 | ||
76171648 | 726 | var dygraph = this; |
8c69de65 | 727 | this.roller_.onchange = function() { dygraph.adjustRoll(dygraph.roller_.value); }; |
76171648 DV |
728 | }; |
729 | ||
730 | // These functions are taken from MochiKit.Signal | |
731 | Dygraph.pageX = function(e) { | |
732 | if (e.pageX) { | |
733 | return (!e.pageX || e.pageX < 0) ? 0 : e.pageX; | |
734 | } else { | |
735 | var de = document; | |
736 | var b = document.body; | |
737 | return e.clientX + | |
738 | (de.scrollLeft || b.scrollLeft) - | |
739 | (de.clientLeft || 0); | |
740 | } | |
741 | }; | |
742 | ||
743 | Dygraph.pageY = function(e) { | |
744 | if (e.pageY) { | |
745 | return (!e.pageY || e.pageY < 0) ? 0 : e.pageY; | |
746 | } else { | |
747 | var de = document; | |
748 | var b = document.body; | |
749 | return e.clientY + | |
750 | (de.scrollTop || b.scrollTop) - | |
751 | (de.clientTop || 0); | |
752 | } | |
753 | }; | |
6a1aa64f DV |
754 | |
755 | /** | |
756 | * Set up all the mouse handlers needed to capture dragging behavior for zoom | |
27385109 | 757 | * events. |
6a1aa64f DV |
758 | * @private |
759 | */ | |
285a6bda | 760 | Dygraph.prototype.createDragInterface_ = function() { |
6a1aa64f DV |
761 | var self = this; |
762 | ||
763 | // Tracks whether the mouse is down right now | |
bce01b0f | 764 | var isZooming = false; |
d58ae307 DV |
765 | var isPanning = false; // is this drag part of a pan? |
766 | var is2DPan = false; // if so, is that pan 1- or 2-dimensional? | |
6a1aa64f DV |
767 | var dragStartX = null; |
768 | var dragStartY = null; | |
769 | var dragEndX = null; | |
770 | var dragEndY = null; | |
eeab5025 | 771 | var dragDirection = null; |
6a1aa64f | 772 | var prevEndX = null; |
8b83c6cc RK |
773 | var prevEndY = null; |
774 | var prevDragDirection = null; | |
e3489f4f | 775 | |
d58ae307 | 776 | // TODO(danvk): update this comment |
e3489f4f RK |
777 | // draggingDate and draggingValue represent the [date,value] point on the |
778 | // graph at which the mouse was pressed. As the mouse moves while panning, | |
779 | // the viewport must pan so that the mouse position points to | |
780 | // [draggingDate, draggingValue] | |
bce01b0f | 781 | var draggingDate = null; |
e3489f4f | 782 | |
d58ae307 | 783 | // TODO(danvk): update this comment |
e3489f4f RK |
784 | // The range in second/value units that the viewport encompasses during a |
785 | // panning operation. | |
bce01b0f | 786 | var dateRange = null; |
6a1aa64f DV |
787 | |
788 | // Utility function to convert page-wide coordinates to canvas coords | |
67e650dc DV |
789 | var px = 0; |
790 | var py = 0; | |
76171648 | 791 | var getX = function(e) { return Dygraph.pageX(e) - px }; |
1e1bf7df | 792 | var getY = function(e) { return Dygraph.pageY(e) - py }; |
6a1aa64f DV |
793 | |
794 | // Draw zoom rectangles when the mouse is down and the user moves around | |
eb7bf005 | 795 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(event) { |
bce01b0f | 796 | if (isZooming) { |
6a1aa64f DV |
797 | dragEndX = getX(event); |
798 | dragEndY = getY(event); | |
799 | ||
8b83c6cc RK |
800 | var xDelta = Math.abs(dragStartX - dragEndX); |
801 | var yDelta = Math.abs(dragStartY - dragEndY); | |
8b211dd6 RK |
802 | |
803 | // drag direction threshold for y axis is twice as large as x axis | |
eeab5025 | 804 | dragDirection = (xDelta < yDelta / 2) ? Dygraph.VERTICAL : Dygraph.HORIZONTAL; |
8b83c6cc RK |
805 | |
806 | self.drawZoomRect_(dragDirection, dragStartX, dragEndX, dragStartY, dragEndY, | |
807 | prevDragDirection, prevEndX, prevEndY); | |
808 | ||
6a1aa64f | 809 | prevEndX = dragEndX; |
8b83c6cc RK |
810 | prevEndY = dragEndY; |
811 | prevDragDirection = dragDirection; | |
bce01b0f DV |
812 | } else if (isPanning) { |
813 | dragEndX = getX(event); | |
814 | dragEndY = getY(event); | |
815 | ||
d58ae307 | 816 | // TODO(danvk): update this comment |
bce01b0f | 817 | // Want to have it so that: |
e3489f4f | 818 | // 1. draggingDate appears at dragEndX, draggingValue appears at dragEndY. |
bce01b0f | 819 | // 2. daterange = (dateWindow_[1] - dateWindow_[0]) is unaltered. |
e3489f4f RK |
820 | // 3. draggingValue appears at dragEndY. |
821 | // 4. valueRange is unaltered. | |
822 | ||
823 | var minDate = draggingDate - (dragEndX / self.width_) * dateRange; | |
824 | var maxDate = minDate + dateRange; | |
825 | self.dateWindow_ = [minDate, maxDate]; | |
bce01b0f | 826 | |
ef0b205b | 827 | |
d58ae307 DV |
828 | // y-axis scaling is automatic unless this is a full 2D pan. |
829 | if (is2DPan) { | |
830 | // Adjust each axis appropriately. | |
831 | var y_frac = dragEndY / self.height_; | |
832 | for (var i = 0; i < self.axes_.length; i++) { | |
833 | var axis = self.axes_[i]; | |
834 | var maxValue = axis.draggingValue + y_frac * axis.dragValueRange; | |
835 | var minValue = maxValue - axis.dragValueRange; | |
836 | axis.valueWindow = [ minValue, maxValue ]; | |
837 | } | |
74f09e22 | 838 | } |
bce01b0f | 839 | |
26ca7938 | 840 | self.drawGraph_(); |
6a1aa64f DV |
841 | } |
842 | }); | |
843 | ||
844 | // Track the beginning of drag events | |
eb7bf005 | 845 | Dygraph.addEvent(this.mouseEventElement_, 'mousedown', function(event) { |
79b3ee42 DV |
846 | // prevents mouse drags from selecting page text. |
847 | if (event.preventDefault) { | |
848 | event.preventDefault(); // Firefox, Chrome, etc. | |
849 | } else { | |
850 | event.returnValue = false; // IE | |
851 | event.cancelBubble = true; | |
852 | } | |
853 | ||
3df0ccf0 DV |
854 | px = Dygraph.findPosX(self.canvas_); |
855 | py = Dygraph.findPosY(self.canvas_); | |
6a1aa64f DV |
856 | dragStartX = getX(event); |
857 | dragStartY = getY(event); | |
bce01b0f | 858 | |
2dab69c3 | 859 | if (event.altKey || event.shiftKey) { |
e3489f4f | 860 | // have to be zoomed in to pan. |
d58ae307 DV |
861 | var zoomedY = false; |
862 | for (var i = 0; i < self.axes_.length; i++) { | |
863 | if (self.axes_[i].valueWindow || self.axes_[i].valueRange) { | |
864 | zoomedY = true; | |
865 | break; | |
866 | } | |
867 | } | |
868 | if (!self.dateWindow_ && !zoomedY) return; | |
e3489f4f | 869 | |
bce01b0f | 870 | isPanning = true; |
e3489f4f RK |
871 | var xRange = self.xAxisRange(); |
872 | dateRange = xRange[1] - xRange[0]; | |
d58ae307 DV |
873 | |
874 | // Record the range of each y-axis at the start of the drag. | |
875 | // If any axis has a valueRange or valueWindow, then we want a 2D pan. | |
876 | is2DPan = false; | |
877 | for (var i = 0; i < self.axes_.length; i++) { | |
878 | var axis = self.axes_[i]; | |
879 | var yRange = self.yAxisRange(i); | |
880 | axis.dragValueRange = yRange[1] - yRange[0]; | |
881 | var r = self.toDataCoords(null, dragStartY, i); | |
882 | axis.draggingValue = r[1]; | |
883 | if (axis.valueWindow || axis.valueRange) is2DPan = true; | |
884 | } | |
e3489f4f RK |
885 | |
886 | // TODO(konigsberg): Switch from all this math to toDataCoords? | |
887 | // Seems to work for the dragging value. | |
d58ae307 | 888 | draggingDate = (dragStartX / self.width_) * dateRange + xRange[0]; |
bce01b0f DV |
889 | } else { |
890 | isZooming = true; | |
891 | } | |
6a1aa64f DV |
892 | }); |
893 | ||
894 | // If the user releases the mouse button during a drag, but not over the | |
895 | // canvas, then it doesn't count as a zooming action. | |
76171648 | 896 | Dygraph.addEvent(document, 'mouseup', function(event) { |
bce01b0f DV |
897 | if (isZooming || isPanning) { |
898 | isZooming = false; | |
6a1aa64f DV |
899 | dragStartX = null; |
900 | dragStartY = null; | |
901 | } | |
bce01b0f DV |
902 | |
903 | if (isPanning) { | |
904 | isPanning = false; | |
905 | draggingDate = null; | |
906 | dateRange = null; | |
d58ae307 | 907 | for (var i = 0; i < self.axes_.length; i++) { |
d63e6799 DV |
908 | delete self.axes_[i].draggingValue; |
909 | delete self.axes_[i].dragValueRange; | |
d58ae307 | 910 | } |
bce01b0f | 911 | } |
6a1aa64f DV |
912 | }); |
913 | ||
914 | // Temporarily cancel the dragging event when the mouse leaves the graph | |
eb7bf005 | 915 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(event) { |
bce01b0f | 916 | if (isZooming) { |
6a1aa64f DV |
917 | dragEndX = null; |
918 | dragEndY = null; | |
919 | } | |
920 | }); | |
921 | ||
922 | // If the mouse is released on the canvas during a drag event, then it's a | |
923 | // zoom. Only do the zoom if it's over a large enough area (>= 10 pixels) | |
eb7bf005 | 924 | Dygraph.addEvent(this.mouseEventElement_, 'mouseup', function(event) { |
bce01b0f DV |
925 | if (isZooming) { |
926 | isZooming = false; | |
6a1aa64f DV |
927 | dragEndX = getX(event); |
928 | dragEndY = getY(event); | |
929 | var regionWidth = Math.abs(dragEndX - dragStartX); | |
930 | var regionHeight = Math.abs(dragEndY - dragStartY); | |
931 | ||
e2b5f2bc DV |
932 | if (regionWidth < 2 && regionHeight < 2 && |
933 | self.lastx_ != undefined && self.lastx_ != -1) { | |
2ad87eaa | 934 | // TODO(danvk): pass along more info about the points, e.g. 'x' |
1e1bf7df | 935 | if (self.attr_('clickCallback') != null) { |
1e1bf7df DV |
936 | self.attr_('clickCallback')(event, self.lastx_, self.selPoints_); |
937 | } | |
938 | if (self.attr_('pointClickCallback')) { | |
939 | // check if the click was on a particular point. | |
940 | var closestIdx = -1; | |
941 | var closestDistance = 0; | |
942 | for (var i = 0; i < self.selPoints_.length; i++) { | |
943 | var p = self.selPoints_[i]; | |
944 | var distance = Math.pow(p.canvasx - dragEndX, 2) + | |
945 | Math.pow(p.canvasy - dragEndY, 2); | |
946 | if (closestIdx == -1 || distance < closestDistance) { | |
947 | closestDistance = distance; | |
948 | closestIdx = i; | |
949 | } | |
950 | } | |
951 | ||
952 | // Allow any click within two pixels of the dot. | |
2ad87eaa | 953 | var radius = self.attr_('highlightCircleSize') + 2; |
1e1bf7df DV |
954 | if (closestDistance <= 5 * 5) { |
955 | self.attr_('pointClickCallback')(event, self.selPoints_[closestIdx]); | |
956 | } | |
957 | } | |
6a1aa64f DV |
958 | } |
959 | ||
eeab5025 | 960 | if (regionWidth >= 10 && dragDirection == Dygraph.HORIZONTAL) { |
8b83c6cc | 961 | self.doZoomX_(Math.min(dragStartX, dragEndX), |
6a1aa64f | 962 | Math.max(dragStartX, dragEndX)); |
eeab5025 | 963 | } else if (regionHeight >= 10 && dragDirection == Dygraph.VERTICAL){ |
8b83c6cc RK |
964 | self.doZoomY_(Math.min(dragStartY, dragEndY), |
965 | Math.max(dragStartY, dragEndY)); | |
6a1aa64f DV |
966 | } else { |
967 | self.canvas_.getContext("2d").clearRect(0, 0, | |
968 | self.canvas_.width, | |
969 | self.canvas_.height); | |
970 | } | |
971 | ||
972 | dragStartX = null; | |
973 | dragStartY = null; | |
974 | } | |
bce01b0f DV |
975 | |
976 | if (isPanning) { | |
977 | isPanning = false; | |
d58ae307 | 978 | is2DPan = false; |
bce01b0f DV |
979 | draggingDate = null; |
980 | dateRange = null; | |
e3489f4f | 981 | valueRange = null; |
bce01b0f | 982 | } |
6a1aa64f DV |
983 | }); |
984 | ||
985 | // Double-clicking zooms back out | |
eb7bf005 | 986 | Dygraph.addEvent(this.mouseEventElement_, 'dblclick', function(event) { |
8b83c6cc RK |
987 | // Disable zooming out if panning. |
988 | if (event.altKey || event.shiftKey) return; | |
989 | ||
990 | self.doUnzoom_(); | |
6a1aa64f DV |
991 | }); |
992 | }; | |
993 | ||
994 | /** | |
995 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
996 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
997 | * avoid extra redrawing, but it's tricky to avoid interactions with the status | |
998 | * dots. | |
8b83c6cc | 999 | * |
39b0e098 RK |
1000 | * @param {Number} direction the direction of the zoom rectangle. Acceptable |
1001 | * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL. | |
6a1aa64f DV |
1002 | * @param {Number} startX The X position where the drag started, in canvas |
1003 | * coordinates. | |
1004 | * @param {Number} endX The current X position of the drag, in canvas coords. | |
8b83c6cc RK |
1005 | * @param {Number} startY The Y position where the drag started, in canvas |
1006 | * coordinates. | |
1007 | * @param {Number} endY The current Y position of the drag, in canvas coords. | |
39b0e098 | 1008 | * @param {Number} prevDirection the value of direction on the previous call to |
8b83c6cc | 1009 | * this function. Used to avoid excess redrawing |
6a1aa64f DV |
1010 | * @param {Number} prevEndX The value of endX on the previous call to this |
1011 | * function. Used to avoid excess redrawing | |
8b83c6cc RK |
1012 | * @param {Number} prevEndY The value of endY on the previous call to this |
1013 | * function. Used to avoid excess redrawing | |
6a1aa64f DV |
1014 | * @private |
1015 | */ | |
8b83c6cc RK |
1016 | Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY, endY, |
1017 | prevDirection, prevEndX, prevEndY) { | |
6a1aa64f DV |
1018 | var ctx = this.canvas_.getContext("2d"); |
1019 | ||
1020 | // Clean up from the previous rect if necessary | |
39b0e098 | 1021 | if (prevDirection == Dygraph.HORIZONTAL) { |
6a1aa64f DV |
1022 | ctx.clearRect(Math.min(startX, prevEndX), 0, |
1023 | Math.abs(startX - prevEndX), this.height_); | |
39b0e098 | 1024 | } else if (prevDirection == Dygraph.VERTICAL){ |
8b83c6cc RK |
1025 | ctx.clearRect(0, Math.min(startY, prevEndY), |
1026 | this.width_, Math.abs(startY - prevEndY)); | |
6a1aa64f DV |
1027 | } |
1028 | ||
1029 | // Draw a light-grey rectangle to show the new viewing area | |
39b0e098 | 1030 | if (direction == Dygraph.HORIZONTAL) { |
8b83c6cc RK |
1031 | if (endX && startX) { |
1032 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
1033 | ctx.fillRect(Math.min(startX, endX), 0, | |
1034 | Math.abs(endX - startX), this.height_); | |
1035 | } | |
1036 | } | |
39b0e098 | 1037 | if (direction == Dygraph.VERTICAL) { |
8b83c6cc RK |
1038 | if (endY && startY) { |
1039 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
1040 | ctx.fillRect(0, Math.min(startY, endY), | |
1041 | this.width_, Math.abs(endY - startY)); | |
1042 | } | |
6a1aa64f DV |
1043 | } |
1044 | }; | |
1045 | ||
1046 | /** | |
8b83c6cc RK |
1047 | * Zoom to something containing [lowX, highX]. These are pixel coordinates in |
1048 | * the canvas. The exact zoom window may be slightly larger if there are no data | |
1049 | * points near lowX or highX. Don't confuse this function with doZoomXDates, | |
1050 | * which accepts dates that match the raw data. This function redraws the graph. | |
d58ae307 | 1051 | * |
6a1aa64f DV |
1052 | * @param {Number} lowX The leftmost pixel value that should be visible. |
1053 | * @param {Number} highX The rightmost pixel value that should be visible. | |
1054 | * @private | |
1055 | */ | |
8b83c6cc | 1056 | Dygraph.prototype.doZoomX_ = function(lowX, highX) { |
6a1aa64f | 1057 | // Find the earliest and latest dates contained in this canvasx range. |
8b83c6cc | 1058 | // Convert the call to date ranges of the raw data. |
56623f3b DV |
1059 | var r = this.toDataCoords(lowX, null); |
1060 | var minDate = r[0]; | |
1061 | r = this.toDataCoords(highX, null); | |
1062 | var maxDate = r[0]; | |
8b83c6cc RK |
1063 | this.doZoomXDates_(minDate, maxDate); |
1064 | }; | |
6a1aa64f | 1065 | |
8b83c6cc RK |
1066 | /** |
1067 | * Zoom to something containing [minDate, maxDate] values. Don't confuse this | |
1068 | * method with doZoomX which accepts pixel coordinates. This function redraws | |
1069 | * the graph. | |
d58ae307 | 1070 | * |
8b83c6cc RK |
1071 | * @param {Number} minDate The minimum date that should be visible. |
1072 | * @param {Number} maxDate The maximum date that should be visible. | |
1073 | * @private | |
1074 | */ | |
1075 | Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) { | |
6a1aa64f | 1076 | this.dateWindow_ = [minDate, maxDate]; |
26ca7938 | 1077 | this.drawGraph_(); |
285a6bda | 1078 | if (this.attr_("zoomCallback")) { |
8b83c6cc RK |
1079 | var yRange = this.yAxisRange(); |
1080 | this.attr_("zoomCallback")(minDate, maxDate, yRange[0], yRange[1]); | |
1081 | } | |
1082 | }; | |
1083 | ||
1084 | /** | |
1085 | * Zoom to something containing [lowY, highY]. These are pixel coordinates in | |
d58ae307 DV |
1086 | * the canvas. This function redraws the graph. |
1087 | * | |
8b83c6cc RK |
1088 | * @param {Number} lowY The topmost pixel value that should be visible. |
1089 | * @param {Number} highY The lowest pixel value that should be visible. | |
1090 | * @private | |
1091 | */ | |
1092 | Dygraph.prototype.doZoomY_ = function(lowY, highY) { | |
d58ae307 DV |
1093 | // Find the highest and lowest values in pixel range for each axis. |
1094 | // Note that lowY (in pixels) corresponds to the max Value (in data coords). | |
1095 | // This is because pixels increase as you go down on the screen, whereas data | |
1096 | // coordinates increase as you go up the screen. | |
1097 | var valueRanges = []; | |
1098 | for (var i = 0; i < this.axes_.length; i++) { | |
1099 | var hi = this.toDataCoords(null, lowY, i); | |
1100 | var low = this.toDataCoords(null, highY, i); | |
1101 | this.axes_[i].valueWindow = [low[1], hi[1]]; | |
1102 | valueRanges.push([low[1], hi[1]]); | |
1103 | } | |
8b83c6cc | 1104 | |
66c380c4 | 1105 | this.drawGraph_(); |
8b83c6cc | 1106 | if (this.attr_("zoomCallback")) { |
d58ae307 DV |
1107 | var xRange = this.xAxisRange(); |
1108 | this.attr_("zoomCallback")(xRange[0], xRange[1], this.yAxisRanges()); | |
8b83c6cc RK |
1109 | } |
1110 | }; | |
1111 | ||
1112 | /** | |
1113 | * Reset the zoom to the original view coordinates. This is the same as | |
1114 | * double-clicking on the graph. | |
d58ae307 | 1115 | * |
8b83c6cc RK |
1116 | * @private |
1117 | */ | |
1118 | Dygraph.prototype.doUnzoom_ = function() { | |
d58ae307 | 1119 | var dirty = false; |
8b83c6cc | 1120 | if (this.dateWindow_ != null) { |
d58ae307 | 1121 | dirty = true; |
8b83c6cc RK |
1122 | this.dateWindow_ = null; |
1123 | } | |
d58ae307 DV |
1124 | |
1125 | for (var i = 0; i < this.axes_.length; i++) { | |
1126 | if (this.axes_[i].valueWindow != null) { | |
1127 | dirty = true; | |
1128 | delete this.axes_[i].valueWindow; | |
1129 | } | |
8b83c6cc RK |
1130 | } |
1131 | ||
1132 | if (dirty) { | |
437c0979 RK |
1133 | // Putting the drawing operation before the callback because it resets |
1134 | // yAxisRange. | |
66c380c4 | 1135 | this.drawGraph_(); |
8b83c6cc RK |
1136 | if (this.attr_("zoomCallback")) { |
1137 | var minDate = this.rawData_[0][0]; | |
1138 | var maxDate = this.rawData_[this.rawData_.length - 1][0]; | |
d58ae307 | 1139 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); |
8b83c6cc | 1140 | } |
67e650dc | 1141 | } |
6a1aa64f DV |
1142 | }; |
1143 | ||
1144 | /** | |
1145 | * When the mouse moves in the canvas, display information about a nearby data | |
1146 | * point and draw dots over those points in the data series. This function | |
1147 | * takes care of cleanup of previously-drawn dots. | |
1148 | * @param {Object} event The mousemove event from the browser. | |
1149 | * @private | |
1150 | */ | |
285a6bda | 1151 | Dygraph.prototype.mouseMove_ = function(event) { |
eb7bf005 | 1152 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_); |
6a1aa64f DV |
1153 | var points = this.layout_.points; |
1154 | ||
1155 | var lastx = -1; | |
1156 | var lasty = -1; | |
1157 | ||
1158 | // Loop through all the points and find the date nearest to our current | |
1159 | // location. | |
1160 | var minDist = 1e+100; | |
1161 | var idx = -1; | |
1162 | for (var i = 0; i < points.length; i++) { | |
1163 | var dist = Math.abs(points[i].canvasx - canvasx); | |
f032c51d | 1164 | if (dist > minDist) continue; |
6a1aa64f DV |
1165 | minDist = dist; |
1166 | idx = i; | |
1167 | } | |
1168 | if (idx >= 0) lastx = points[idx].xval; | |
1169 | // Check that you can really highlight the last day's data | |
1170 | if (canvasx > points[points.length-1].canvasx) | |
1171 | lastx = points[points.length-1].xval; | |
1172 | ||
1173 | // Extract the points we've selected | |
b258a3da | 1174 | this.selPoints_ = []; |
50360fd0 | 1175 | var l = points.length; |
416b05ad NK |
1176 | if (!this.attr_("stackedGraph")) { |
1177 | for (var i = 0; i < l; i++) { | |
1178 | if (points[i].xval == lastx) { | |
1179 | this.selPoints_.push(points[i]); | |
1180 | } | |
1181 | } | |
1182 | } else { | |
354e15ab DE |
1183 | // Need to 'unstack' points starting from the bottom |
1184 | var cumulative_sum = 0; | |
416b05ad NK |
1185 | for (var i = l - 1; i >= 0; i--) { |
1186 | if (points[i].xval == lastx) { | |
354e15ab | 1187 | var p = {}; // Clone the point since we modify it |
d4139cd8 NK |
1188 | for (var k in points[i]) { |
1189 | p[k] = points[i][k]; | |
50360fd0 NK |
1190 | } |
1191 | p.yval -= cumulative_sum; | |
1192 | cumulative_sum += p.yval; | |
d4139cd8 | 1193 | this.selPoints_.push(p); |
12e4c741 | 1194 | } |
6a1aa64f | 1195 | } |
354e15ab | 1196 | this.selPoints_.reverse(); |
6a1aa64f DV |
1197 | } |
1198 | ||
b258a3da | 1199 | if (this.attr_("highlightCallback")) { |
a4c6a67c | 1200 | var px = this.lastx_; |
dd082dda | 1201 | if (px !== null && lastx != px) { |
344ba8c0 | 1202 | // only fire if the selected point has changed. |
2ddb1197 | 1203 | this.attr_("highlightCallback")(event, lastx, this.selPoints_, this.idxToRow_(idx)); |
43af96e7 | 1204 | } |
12e4c741 | 1205 | } |
43af96e7 | 1206 | |
239c712d NAG |
1207 | // Save last x position for callbacks. |
1208 | this.lastx_ = lastx; | |
50360fd0 | 1209 | |
239c712d NAG |
1210 | this.updateSelection_(); |
1211 | }; | |
b258a3da | 1212 | |
239c712d | 1213 | /** |
2ddb1197 SC |
1214 | * Transforms layout_.points index into data row number |
1215 | * @param int layout_.points index | |
1216 | * @return int row number | |
1217 | * @private | |
1218 | */ | |
1219 | Dygraph.prototype.idxToRow_ = function(idx) { | |
1220 | if(idx<0)return -1; | |
1221 | ||
1222 | for (var i in this.layout_.datasets) { | |
1223 | if (idx < this.layout_.datasets[i].length) { | |
1224 | return this.boundaryIds_[0][0]+idx; | |
1225 | } | |
1226 | idx-=this.layout_.datasets[i].length; | |
1227 | } | |
1228 | return -1; | |
1229 | } | |
1230 | ||
1231 | ||
1232 | /** | |
239c712d NAG |
1233 | * Draw dots over the selectied points in the data series. This function |
1234 | * takes care of cleanup of previously-drawn dots. | |
1235 | * @private | |
1236 | */ | |
1237 | Dygraph.prototype.updateSelection_ = function() { | |
6a1aa64f | 1238 | // Clear the previously drawn vertical, if there is one |
6a1aa64f DV |
1239 | var ctx = this.canvas_.getContext("2d"); |
1240 | if (this.previousVerticalX_ >= 0) { | |
46dde5f9 DV |
1241 | // Determine the maximum highlight circle size. |
1242 | var maxCircleSize = 0; | |
227b93cc DV |
1243 | var labels = this.attr_('labels'); |
1244 | for (var i = 1; i < labels.length; i++) { | |
1245 | var r = this.attr_('highlightCircleSize', labels[i]); | |
46dde5f9 DV |
1246 | if (r > maxCircleSize) maxCircleSize = r; |
1247 | } | |
6a1aa64f | 1248 | var px = this.previousVerticalX_; |
46dde5f9 DV |
1249 | ctx.clearRect(px - maxCircleSize - 1, 0, |
1250 | 2 * maxCircleSize + 2, this.height_); | |
6a1aa64f DV |
1251 | } |
1252 | ||
584ceeaa DV |
1253 | var isOK = function(x) { return x && !isNaN(x); }; |
1254 | ||
d160cc3b | 1255 | if (this.selPoints_.length > 0) { |
b258a3da | 1256 | var canvasx = this.selPoints_[0].canvasx; |
6a1aa64f DV |
1257 | |
1258 | // Set the status message to indicate the selected point(s) | |
239c712d | 1259 | var replace = this.attr_('xValueFormatter')(this.lastx_, this) + ":"; |
50360fd0 | 1260 | var fmtFunc = this.attr_('yValueFormatter'); |
6a1aa64f | 1261 | var clen = this.colors_.length; |
d160cc3b NK |
1262 | |
1263 | if (this.attr_('showLabelsOnHighlight')) { | |
1264 | // Set the status message to indicate the selected point(s) | |
d160cc3b | 1265 | for (var i = 0; i < this.selPoints_.length; i++) { |
129569a5 | 1266 | if (!this.attr_("labelsShowZeroValues") && this.selPoints_[i].yval == 0) continue; |
d160cc3b NK |
1267 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
1268 | if (this.attr_("labelsSeparateLines")) { | |
1269 | replace += "<br/>"; | |
1270 | } | |
1271 | var point = this.selPoints_[i]; | |
8fb6dc24 | 1272 | var c = new RGBColor(this.plotter_.colors[point.name]); |
029da4b6 | 1273 | var yval = fmtFunc(point.yval); |
d160cc3b NK |
1274 | replace += " <b><font color='" + c.toHex() + "'>" |
1275 | + point.name + "</font></b>:" | |
1276 | + yval; | |
6a1aa64f | 1277 | } |
50360fd0 | 1278 | |
d160cc3b | 1279 | this.attr_("labelsDiv").innerHTML = replace; |
6a1aa64f | 1280 | } |
6a1aa64f | 1281 | |
6a1aa64f | 1282 | // Draw colored circles over the center of each selected point |
43af96e7 | 1283 | ctx.save(); |
b258a3da | 1284 | for (var i = 0; i < this.selPoints_.length; i++) { |
f032c51d | 1285 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
227b93cc DV |
1286 | var circleSize = |
1287 | this.attr_('highlightCircleSize', this.selPoints_[i].name); | |
6a1aa64f | 1288 | ctx.beginPath(); |
563c70ca | 1289 | ctx.fillStyle = this.plotter_.colors[this.selPoints_[i].name]; |
f032c51d | 1290 | ctx.arc(canvasx, this.selPoints_[i].canvasy, circleSize, |
7bf6a9fe | 1291 | 0, 2 * Math.PI, false); |
6a1aa64f DV |
1292 | ctx.fill(); |
1293 | } | |
1294 | ctx.restore(); | |
1295 | ||
1296 | this.previousVerticalX_ = canvasx; | |
1297 | } | |
1298 | }; | |
1299 | ||
1300 | /** | |
239c712d NAG |
1301 | * Set manually set selected dots, and display information about them |
1302 | * @param int row number that should by highlighted | |
1303 | * false value clears the selection | |
1304 | * @public | |
1305 | */ | |
1306 | Dygraph.prototype.setSelection = function(row) { | |
1307 | // Extract the points we've selected | |
1308 | this.selPoints_ = []; | |
1309 | var pos = 0; | |
50360fd0 | 1310 | |
239c712d | 1311 | if (row !== false) { |
16269f6e NAG |
1312 | row = row-this.boundaryIds_[0][0]; |
1313 | } | |
50360fd0 | 1314 | |
16269f6e | 1315 | if (row !== false && row >= 0) { |
239c712d | 1316 | for (var i in this.layout_.datasets) { |
16269f6e | 1317 | if (row < this.layout_.datasets[i].length) { |
38f33a44 | 1318 | var point = this.layout_.points[pos+row]; |
1319 | ||
1320 | if (this.attr_("stackedGraph")) { | |
8c03ba63 | 1321 | point = this.layout_.unstackPointAtIndex(pos+row); |
38f33a44 | 1322 | } |
1323 | ||
1324 | this.selPoints_.push(point); | |
16269f6e | 1325 | } |
239c712d NAG |
1326 | pos += this.layout_.datasets[i].length; |
1327 | } | |
16269f6e | 1328 | } |
50360fd0 | 1329 | |
16269f6e | 1330 | if (this.selPoints_.length) { |
239c712d NAG |
1331 | this.lastx_ = this.selPoints_[0].xval; |
1332 | this.updateSelection_(); | |
1333 | } else { | |
1334 | this.lastx_ = -1; | |
1335 | this.clearSelection(); | |
1336 | } | |
1337 | ||
1338 | }; | |
1339 | ||
1340 | /** | |
6a1aa64f DV |
1341 | * The mouse has left the canvas. Clear out whatever artifacts remain |
1342 | * @param {Object} event the mouseout event from the browser. | |
1343 | * @private | |
1344 | */ | |
285a6bda | 1345 | Dygraph.prototype.mouseOut_ = function(event) { |
a4c6a67c AV |
1346 | if (this.attr_("unhighlightCallback")) { |
1347 | this.attr_("unhighlightCallback")(event); | |
1348 | } | |
1349 | ||
43af96e7 | 1350 | if (this.attr_("hideOverlayOnMouseOut")) { |
239c712d | 1351 | this.clearSelection(); |
43af96e7 | 1352 | } |
6a1aa64f DV |
1353 | }; |
1354 | ||
239c712d NAG |
1355 | /** |
1356 | * Remove all selection from the canvas | |
1357 | * @public | |
1358 | */ | |
1359 | Dygraph.prototype.clearSelection = function() { | |
1360 | // Get rid of the overlay data | |
1361 | var ctx = this.canvas_.getContext("2d"); | |
1362 | ctx.clearRect(0, 0, this.width_, this.height_); | |
1363 | this.attr_("labelsDiv").innerHTML = ""; | |
1364 | this.selPoints_ = []; | |
1365 | this.lastx_ = -1; | |
1366 | } | |
1367 | ||
103b7292 NAG |
1368 | /** |
1369 | * Returns the number of the currently selected row | |
1370 | * @return int row number, of -1 if nothing is selected | |
1371 | * @public | |
1372 | */ | |
1373 | Dygraph.prototype.getSelection = function() { | |
1374 | if (!this.selPoints_ || this.selPoints_.length < 1) { | |
1375 | return -1; | |
1376 | } | |
50360fd0 | 1377 | |
103b7292 NAG |
1378 | for (var row=0; row<this.layout_.points.length; row++ ) { |
1379 | if (this.layout_.points[row].x == this.selPoints_[0].x) { | |
16269f6e | 1380 | return row + this.boundaryIds_[0][0]; |
103b7292 NAG |
1381 | } |
1382 | } | |
1383 | return -1; | |
1384 | } | |
1385 | ||
285a6bda | 1386 | Dygraph.zeropad = function(x) { |
32988383 DV |
1387 | if (x < 10) return "0" + x; else return "" + x; |
1388 | } | |
1389 | ||
6a1aa64f | 1390 | /** |
6b8e33dd DV |
1391 | * Return a string version of the hours, minutes and seconds portion of a date. |
1392 | * @param {Number} date The JavaScript date (ms since epoch) | |
1393 | * @return {String} A time of the form "HH:MM:SS" | |
1394 | * @private | |
1395 | */ | |
bf640e56 | 1396 | Dygraph.hmsString_ = function(date) { |
285a6bda | 1397 | var zeropad = Dygraph.zeropad; |
6b8e33dd DV |
1398 | var d = new Date(date); |
1399 | if (d.getSeconds()) { | |
1400 | return zeropad(d.getHours()) + ":" + | |
1401 | zeropad(d.getMinutes()) + ":" + | |
1402 | zeropad(d.getSeconds()); | |
6b8e33dd | 1403 | } else { |
054531ca | 1404 | return zeropad(d.getHours()) + ":" + zeropad(d.getMinutes()); |
6b8e33dd DV |
1405 | } |
1406 | } | |
1407 | ||
1408 | /** | |
bf640e56 AV |
1409 | * Convert a JS date to a string appropriate to display on an axis that |
1410 | * is displaying values at the stated granularity. | |
1411 | * @param {Date} date The date to format | |
1412 | * @param {Number} granularity One of the Dygraph granularity constants | |
1413 | * @return {String} The formatted date | |
1414 | * @private | |
1415 | */ | |
1416 | Dygraph.dateAxisFormatter = function(date, granularity) { | |
1417 | if (granularity >= Dygraph.MONTHLY) { | |
1418 | return date.strftime('%b %y'); | |
1419 | } else { | |
31eddad3 | 1420 | var frac = date.getHours() * 3600 + date.getMinutes() * 60 + date.getSeconds() + date.getMilliseconds(); |
bf640e56 AV |
1421 | if (frac == 0 || granularity >= Dygraph.DAILY) { |
1422 | return new Date(date.getTime() + 3600*1000).strftime('%d%b'); | |
1423 | } else { | |
1424 | return Dygraph.hmsString_(date.getTime()); | |
1425 | } | |
1426 | } | |
1427 | } | |
1428 | ||
1429 | /** | |
6a1aa64f DV |
1430 | * Convert a JS date (millis since epoch) to YYYY/MM/DD |
1431 | * @param {Number} date The JavaScript date (ms since epoch) | |
1432 | * @return {String} A date of the form "YYYY/MM/DD" | |
1433 | * @private | |
1434 | */ | |
285a6bda DV |
1435 | Dygraph.dateString_ = function(date, self) { |
1436 | var zeropad = Dygraph.zeropad; | |
6a1aa64f DV |
1437 | var d = new Date(date); |
1438 | ||
1439 | // Get the year: | |
1440 | var year = "" + d.getFullYear(); | |
1441 | // Get a 0 padded month string | |
6b8e33dd | 1442 | var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh |
6a1aa64f | 1443 | // Get a 0 padded day string |
6b8e33dd | 1444 | var day = zeropad(d.getDate()); |
6a1aa64f | 1445 | |
6b8e33dd DV |
1446 | var ret = ""; |
1447 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); | |
bf640e56 | 1448 | if (frac) ret = " " + Dygraph.hmsString_(date); |
6b8e33dd DV |
1449 | |
1450 | return year + "/" + month + "/" + day + ret; | |
6a1aa64f DV |
1451 | }; |
1452 | ||
1453 | /** | |
1454 | * Round a number to the specified number of digits past the decimal point. | |
1455 | * @param {Number} num The number to round | |
1456 | * @param {Number} places The number of decimals to which to round | |
1457 | * @return {Number} The rounded number | |
1458 | * @private | |
1459 | */ | |
029da4b6 | 1460 | Dygraph.round_ = function(num, places) { |
6a1aa64f DV |
1461 | var shift = Math.pow(10, places); |
1462 | return Math.round(num * shift)/shift; | |
1463 | }; | |
1464 | ||
1465 | /** | |
1466 | * Fires when there's data available to be graphed. | |
1467 | * @param {String} data Raw CSV data to be plotted | |
1468 | * @private | |
1469 | */ | |
285a6bda | 1470 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f | 1471 | this.rawData_ = this.parseCSV_(data); |
26ca7938 | 1472 | this.predraw_(); |
6a1aa64f DV |
1473 | }; |
1474 | ||
285a6bda | 1475 | Dygraph.prototype.months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", |
8846615a | 1476 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]; |
285a6bda | 1477 | Dygraph.prototype.quarters = ["Jan", "Apr", "Jul", "Oct"]; |
6a1aa64f DV |
1478 | |
1479 | /** | |
1480 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
1481 | * @private | |
1482 | */ | |
285a6bda | 1483 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f DV |
1484 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
1485 | var startDate, endDate; | |
1486 | if (this.dateWindow_) { | |
1487 | startDate = this.dateWindow_[0]; | |
1488 | endDate = this.dateWindow_[1]; | |
1489 | } else { | |
1490 | startDate = this.rawData_[0][0]; | |
1491 | endDate = this.rawData_[this.rawData_.length - 1][0]; | |
1492 | } | |
1493 | ||
285a6bda | 1494 | var xTicks = this.attr_('xTicker')(startDate, endDate, this); |
6a1aa64f | 1495 | this.layout_.updateOptions({xTicks: xTicks}); |
32988383 DV |
1496 | }; |
1497 | ||
1498 | // Time granularity enumeration | |
285a6bda | 1499 | Dygraph.SECONDLY = 0; |
20a41c17 DV |
1500 | Dygraph.TWO_SECONDLY = 1; |
1501 | Dygraph.FIVE_SECONDLY = 2; | |
1502 | Dygraph.TEN_SECONDLY = 3; | |
1503 | Dygraph.THIRTY_SECONDLY = 4; | |
1504 | Dygraph.MINUTELY = 5; | |
1505 | Dygraph.TWO_MINUTELY = 6; | |
1506 | Dygraph.FIVE_MINUTELY = 7; | |
1507 | Dygraph.TEN_MINUTELY = 8; | |
1508 | Dygraph.THIRTY_MINUTELY = 9; | |
1509 | Dygraph.HOURLY = 10; | |
1510 | Dygraph.TWO_HOURLY = 11; | |
1511 | Dygraph.SIX_HOURLY = 12; | |
1512 | Dygraph.DAILY = 13; | |
1513 | Dygraph.WEEKLY = 14; | |
1514 | Dygraph.MONTHLY = 15; | |
1515 | Dygraph.QUARTERLY = 16; | |
1516 | Dygraph.BIANNUAL = 17; | |
1517 | Dygraph.ANNUAL = 18; | |
1518 | Dygraph.DECADAL = 19; | |
1519 | Dygraph.NUM_GRANULARITIES = 20; | |
285a6bda DV |
1520 | |
1521 | Dygraph.SHORT_SPACINGS = []; | |
1522 | Dygraph.SHORT_SPACINGS[Dygraph.SECONDLY] = 1000 * 1; | |
20a41c17 DV |
1523 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_SECONDLY] = 1000 * 2; |
1524 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_SECONDLY] = 1000 * 5; | |
285a6bda DV |
1525 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_SECONDLY] = 1000 * 10; |
1526 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_SECONDLY] = 1000 * 30; | |
1527 | Dygraph.SHORT_SPACINGS[Dygraph.MINUTELY] = 1000 * 60; | |
20a41c17 DV |
1528 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_MINUTELY] = 1000 * 60 * 2; |
1529 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_MINUTELY] = 1000 * 60 * 5; | |
285a6bda DV |
1530 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_MINUTELY] = 1000 * 60 * 10; |
1531 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_MINUTELY] = 1000 * 60 * 30; | |
1532 | Dygraph.SHORT_SPACINGS[Dygraph.HOURLY] = 1000 * 3600; | |
20a41c17 | 1533 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_HOURLY] = 1000 * 3600 * 2; |
805d5519 | 1534 | Dygraph.SHORT_SPACINGS[Dygraph.SIX_HOURLY] = 1000 * 3600 * 6; |
285a6bda DV |
1535 | Dygraph.SHORT_SPACINGS[Dygraph.DAILY] = 1000 * 86400; |
1536 | Dygraph.SHORT_SPACINGS[Dygraph.WEEKLY] = 1000 * 604800; | |
32988383 DV |
1537 | |
1538 | // NumXTicks() | |
1539 | // | |
1540 | // If we used this time granularity, how many ticks would there be? | |
1541 | // This is only an approximation, but it's generally good enough. | |
1542 | // | |
285a6bda DV |
1543 | Dygraph.prototype.NumXTicks = function(start_time, end_time, granularity) { |
1544 | if (granularity < Dygraph.MONTHLY) { | |
32988383 | 1545 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1546 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
32988383 DV |
1547 | return Math.floor(0.5 + 1.0 * (end_time - start_time) / spacing); |
1548 | } else { | |
1549 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1550 | var num_months = 12; | |
285a6bda DV |
1551 | if (granularity == Dygraph.QUARTERLY) num_months = 3; |
1552 | if (granularity == Dygraph.BIANNUAL) num_months = 2; | |
1553 | if (granularity == Dygraph.ANNUAL) num_months = 1; | |
1554 | if (granularity == Dygraph.DECADAL) { num_months = 1; year_mod = 10; } | |
32988383 DV |
1555 | |
1556 | var msInYear = 365.2524 * 24 * 3600 * 1000; | |
1557 | var num_years = 1.0 * (end_time - start_time) / msInYear; | |
1558 | return Math.floor(0.5 + 1.0 * num_years * num_months / year_mod); | |
1559 | } | |
1560 | }; | |
1561 | ||
1562 | // GetXAxis() | |
1563 | // | |
1564 | // Construct an x-axis of nicely-formatted times on meaningful boundaries | |
1565 | // (e.g. 'Jan 09' rather than 'Jan 22, 2009'). | |
1566 | // | |
1567 | // Returns an array containing {v: millis, label: label} dictionaries. | |
1568 | // | |
285a6bda | 1569 | Dygraph.prototype.GetXAxis = function(start_time, end_time, granularity) { |
bf640e56 | 1570 | var formatter = this.attr_("xAxisLabelFormatter"); |
32988383 | 1571 | var ticks = []; |
285a6bda | 1572 | if (granularity < Dygraph.MONTHLY) { |
32988383 | 1573 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1574 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
3d29302c | 1575 | var format = '%d%b'; // e.g. "1Jan" |
076c9622 DV |
1576 | |
1577 | // Find a time less than start_time which occurs on a "nice" time boundary | |
1578 | // for this granularity. | |
1579 | var g = spacing / 1000; | |
076c9622 DV |
1580 | var d = new Date(start_time); |
1581 | if (g <= 60) { // seconds | |
1582 | var x = d.getSeconds(); d.setSeconds(x - x % g); | |
1583 | } else { | |
1584 | d.setSeconds(0); | |
1585 | g /= 60; | |
1586 | if (g <= 60) { // minutes | |
1587 | var x = d.getMinutes(); d.setMinutes(x - x % g); | |
1588 | } else { | |
1589 | d.setMinutes(0); | |
1590 | g /= 60; | |
1591 | ||
1592 | if (g <= 24) { // days | |
1593 | var x = d.getHours(); d.setHours(x - x % g); | |
1594 | } else { | |
1595 | d.setHours(0); | |
1596 | g /= 24; | |
1597 | ||
1598 | if (g == 7) { // one week | |
20a41c17 | 1599 | d.setDate(d.getDate() - d.getDay()); |
076c9622 DV |
1600 | } |
1601 | } | |
1602 | } | |
328bb812 | 1603 | } |
076c9622 DV |
1604 | start_time = d.getTime(); |
1605 | ||
32988383 | 1606 | for (var t = start_time; t <= end_time; t += spacing) { |
bf640e56 | 1607 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1608 | } |
1609 | } else { | |
1610 | // Display a tick mark on the first of a set of months of each year. | |
1611 | // Years get a tick mark iff y % year_mod == 0. This is useful for | |
1612 | // displaying a tick mark once every 10 years, say, on long time scales. | |
1613 | var months; | |
1614 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1615 | ||
285a6bda | 1616 | if (granularity == Dygraph.MONTHLY) { |
32988383 | 1617 | months = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ]; |
285a6bda | 1618 | } else if (granularity == Dygraph.QUARTERLY) { |
32988383 | 1619 | months = [ 0, 3, 6, 9 ]; |
285a6bda | 1620 | } else if (granularity == Dygraph.BIANNUAL) { |
32988383 | 1621 | months = [ 0, 6 ]; |
285a6bda | 1622 | } else if (granularity == Dygraph.ANNUAL) { |
32988383 | 1623 | months = [ 0 ]; |
285a6bda | 1624 | } else if (granularity == Dygraph.DECADAL) { |
32988383 DV |
1625 | months = [ 0 ]; |
1626 | year_mod = 10; | |
1627 | } | |
1628 | ||
1629 | var start_year = new Date(start_time).getFullYear(); | |
1630 | var end_year = new Date(end_time).getFullYear(); | |
285a6bda | 1631 | var zeropad = Dygraph.zeropad; |
32988383 DV |
1632 | for (var i = start_year; i <= end_year; i++) { |
1633 | if (i % year_mod != 0) continue; | |
1634 | for (var j = 0; j < months.length; j++) { | |
1635 | var date_str = i + "/" + zeropad(1 + months[j]) + "/01"; | |
1636 | var t = Date.parse(date_str); | |
1637 | if (t < start_time || t > end_time) continue; | |
bf640e56 | 1638 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1639 | } |
1640 | } | |
1641 | } | |
1642 | ||
1643 | return ticks; | |
1644 | }; | |
1645 | ||
6a1aa64f DV |
1646 | |
1647 | /** | |
1648 | * Add ticks to the x-axis based on a date range. | |
1649 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1650 | * @param {Number} endDate End of the date window (millis since epoch) | |
1651 | * @return {Array.<Object>} Array of {label, value} tuples. | |
1652 | * @public | |
1653 | */ | |
285a6bda | 1654 | Dygraph.dateTicker = function(startDate, endDate, self) { |
32988383 | 1655 | var chosen = -1; |
285a6bda DV |
1656 | for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) { |
1657 | var num_ticks = self.NumXTicks(startDate, endDate, i); | |
1658 | if (self.width_ / num_ticks >= self.attr_('pixelsPerXLabel')) { | |
32988383 DV |
1659 | chosen = i; |
1660 | break; | |
2769de62 | 1661 | } |
6a1aa64f DV |
1662 | } |
1663 | ||
32988383 | 1664 | if (chosen >= 0) { |
285a6bda | 1665 | return self.GetXAxis(startDate, endDate, chosen); |
6a1aa64f | 1666 | } else { |
32988383 | 1667 | // TODO(danvk): signal error. |
6a1aa64f | 1668 | } |
6a1aa64f DV |
1669 | }; |
1670 | ||
1671 | /** | |
1672 | * Add ticks when the x axis has numbers on it (instead of dates) | |
1673 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1674 | * @param {Number} endDate End of the date window (millis since epoch) | |
84fc6aa7 | 1675 | * @param self |
f30cf740 | 1676 | * @param {function} attribute accessor function. |
6a1aa64f DV |
1677 | * @return {Array.<Object>} Array of {label, value} tuples. |
1678 | * @public | |
1679 | */ | |
0d64e596 | 1680 | Dygraph.numericTicks = function(minV, maxV, self, axis_props, vals) { |
70c80071 DV |
1681 | var attr = function(k) { |
1682 | if (axis_props && axis_props.hasOwnProperty(k)) return axis_props[k]; | |
1683 | return self.attr_(k); | |
1684 | }; | |
f09fc545 | 1685 | |
0d64e596 DV |
1686 | var ticks = []; |
1687 | if (vals) { | |
1688 | for (var i = 0; i < vals.length; i++) { | |
1689 | ticks.push({v: vals[i]}); | |
1690 | } | |
f09e46d4 | 1691 | } else { |
0d64e596 DV |
1692 | // Basic idea: |
1693 | // Try labels every 1, 2, 5, 10, 20, 50, 100, etc. | |
1694 | // Calculate the resulting tick spacing (i.e. this.height_ / nTicks). | |
1695 | // The first spacing greater than pixelsPerYLabel is what we use. | |
1696 | // TODO(danvk): version that works on a log scale. | |
f09fc545 | 1697 | if (attr("labelsKMG2")) { |
0d64e596 | 1698 | var mults = [1, 2, 4, 8]; |
f09e46d4 | 1699 | } else { |
0d64e596 | 1700 | var mults = [1, 2, 5]; |
f09e46d4 | 1701 | } |
0d64e596 DV |
1702 | var scale, low_val, high_val, nTicks; |
1703 | // TODO(danvk): make it possible to set this for x- and y-axes independently. | |
1704 | var pixelsPerTick = attr('pixelsPerYLabel'); | |
1705 | for (var i = -10; i < 50; i++) { | |
1706 | if (attr("labelsKMG2")) { | |
1707 | var base_scale = Math.pow(16, i); | |
1708 | } else { | |
1709 | var base_scale = Math.pow(10, i); | |
1710 | } | |
1711 | for (var j = 0; j < mults.length; j++) { | |
1712 | scale = base_scale * mults[j]; | |
1713 | low_val = Math.floor(minV / scale) * scale; | |
1714 | high_val = Math.ceil(maxV / scale) * scale; | |
1715 | nTicks = Math.abs(high_val - low_val) / scale; | |
1716 | var spacing = self.height_ / nTicks; | |
1717 | // wish I could break out of both loops at once... | |
1718 | if (spacing > pixelsPerTick) break; | |
1719 | } | |
285a6bda | 1720 | if (spacing > pixelsPerTick) break; |
c6336f04 | 1721 | } |
0d64e596 DV |
1722 | |
1723 | // Construct the set of ticks. | |
1724 | // Allow reverse y-axis if it's explicitly requested. | |
1725 | if (low_val > high_val) scale *= -1; | |
1726 | for (var i = 0; i < nTicks; i++) { | |
1727 | var tickV = low_val + i * scale; | |
1728 | ticks.push( {v: tickV} ); | |
1729 | } | |
6a1aa64f DV |
1730 | } |
1731 | ||
0d64e596 | 1732 | // Add formatted labels to the ticks. |
ed11be50 DV |
1733 | var k; |
1734 | var k_labels = []; | |
f09fc545 | 1735 | if (attr("labelsKMB")) { |
ed11be50 DV |
1736 | k = 1000; |
1737 | k_labels = [ "K", "M", "B", "T" ]; | |
1738 | } | |
f09fc545 | 1739 | if (attr("labelsKMG2")) { |
ed11be50 DV |
1740 | if (k) self.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); |
1741 | k = 1024; | |
1742 | k_labels = [ "k", "M", "G", "T" ]; | |
1743 | } | |
c94eee24 | 1744 | var formatter = attr('yAxisLabelFormatter') ? attr('yAxisLabelFormatter') : attr('yValueFormatter'); |
ed11be50 | 1745 | |
0d64e596 DV |
1746 | for (var i = 0; i < ticks.length; i++) { |
1747 | var tickV = ticks[i].v; | |
0af6e346 | 1748 | var absTickV = Math.abs(tickV); |
84fc6aa7 NN |
1749 | var label; |
1750 | if (formatter != undefined) { | |
1751 | label = formatter(tickV); | |
1752 | } else { | |
1753 | label = Dygraph.round_(tickV, 2); | |
1754 | } | |
ed11be50 DV |
1755 | if (k_labels.length) { |
1756 | // Round up to an appropriate unit. | |
1757 | var n = k*k*k*k; | |
1758 | for (var j = 3; j >= 0; j--, n /= k) { | |
1759 | if (absTickV >= n) { | |
029da4b6 | 1760 | label = Dygraph.round_(tickV / n, 1) + k_labels[j]; |
ed11be50 DV |
1761 | break; |
1762 | } | |
afefbcdb | 1763 | } |
6a1aa64f | 1764 | } |
0d64e596 | 1765 | ticks[i].label = label; |
6a1aa64f DV |
1766 | } |
1767 | return ticks; | |
1768 | }; | |
1769 | ||
5011e7a1 DV |
1770 | // Computes the range of the data series (including confidence intervals). |
1771 | // series is either [ [x1, y1], [x2, y2], ... ] or | |
1772 | // [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... | |
1773 | // Returns [low, high] | |
1774 | Dygraph.prototype.extremeValues_ = function(series) { | |
1775 | var minY = null, maxY = null; | |
1776 | ||
9922b78b | 1777 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
5011e7a1 DV |
1778 | if (bars) { |
1779 | // With custom bars, maxY is the max of the high values. | |
1780 | for (var j = 0; j < series.length; j++) { | |
1781 | var y = series[j][1][0]; | |
1782 | if (!y) continue; | |
1783 | var low = y - series[j][1][1]; | |
1784 | var high = y + series[j][1][2]; | |
1785 | if (low > y) low = y; // this can happen with custom bars, | |
1786 | if (high < y) high = y; // e.g. in tests/custom-bars.html | |
1787 | if (maxY == null || high > maxY) { | |
1788 | maxY = high; | |
1789 | } | |
1790 | if (minY == null || low < minY) { | |
1791 | minY = low; | |
1792 | } | |
1793 | } | |
1794 | } else { | |
1795 | for (var j = 0; j < series.length; j++) { | |
1796 | var y = series[j][1]; | |
d12999d3 | 1797 | if (y === null || isNaN(y)) continue; |
5011e7a1 DV |
1798 | if (maxY == null || y > maxY) { |
1799 | maxY = y; | |
1800 | } | |
1801 | if (minY == null || y < minY) { | |
1802 | minY = y; | |
1803 | } | |
1804 | } | |
1805 | } | |
1806 | ||
1807 | return [minY, maxY]; | |
1808 | }; | |
1809 | ||
6a1aa64f | 1810 | /** |
26ca7938 DV |
1811 | * This function is called once when the chart's data is changed or the options |
1812 | * dictionary is updated. It is _not_ called when the user pans or zooms. The | |
1813 | * idea is that values derived from the chart's data can be computed here, | |
1814 | * rather than every time the chart is drawn. This includes things like the | |
1815 | * number of axes, rolling averages, etc. | |
1816 | */ | |
1817 | Dygraph.prototype.predraw_ = function() { | |
1818 | // TODO(danvk): move more computations out of drawGraph_ and into here. | |
1819 | this.computeYAxes_(); | |
1820 | ||
1821 | // Create a new plotter. | |
70c80071 | 1822 | if (this.plotter_) this.plotter_.clear(); |
26ca7938 DV |
1823 | this.plotter_ = new DygraphCanvasRenderer(this, |
1824 | this.hidden_, this.layout_, | |
1825 | this.renderOptions_); | |
1826 | ||
0abfbd7e DV |
1827 | // The roller sits in the bottom left corner of the chart. We don't know where |
1828 | // this will be until the options are available, so it's positioned here. | |
8c69de65 | 1829 | this.createRollInterface_(); |
26ca7938 | 1830 | |
0abfbd7e DV |
1831 | // Same thing applies for the labelsDiv. It's right edge should be flush with |
1832 | // the right edge of the charting area (which may not be the same as the right | |
1833 | // edge of the div, if we have two y-axes. | |
1834 | this.positionLabelsDiv_(); | |
1835 | ||
26ca7938 DV |
1836 | // If the data or options have changed, then we'd better redraw. |
1837 | this.drawGraph_(); | |
1838 | }; | |
1839 | ||
1840 | /** | |
2f5e7e1a | 1841 | ======= |
26ca7938 DV |
1842 | * Update the graph with new data. This method is called when the viewing area |
1843 | * has changed. If the underlying data or options have changed, predraw_ will | |
1844 | * be called before drawGraph_ is called. | |
6a1aa64f DV |
1845 | * @private |
1846 | */ | |
26ca7938 DV |
1847 | Dygraph.prototype.drawGraph_ = function() { |
1848 | var data = this.rawData_; | |
1849 | ||
fe0b7c03 DV |
1850 | // This is used to set the second parameter to drawCallback, below. |
1851 | var is_initial_draw = this.is_initial_draw_; | |
1852 | this.is_initial_draw_ = false; | |
1853 | ||
3bd9c228 | 1854 | var minY = null, maxY = null; |
6a1aa64f | 1855 | this.layout_.removeAllDatasets(); |
285a6bda | 1856 | this.setColors_(); |
9317362d | 1857 | this.attrs_['pointSize'] = 0.5 * this.attr_('highlightCircleSize'); |
285a6bda | 1858 | |
354e15ab DE |
1859 | // Loop over the fields (series). Go from the last to the first, |
1860 | // because if they're stacked that's how we accumulate the values. | |
43af96e7 | 1861 | |
354e15ab DE |
1862 | var cumulative_y = []; // For stacked series. |
1863 | var datasets = []; | |
1864 | ||
f09fc545 DV |
1865 | var extremes = {}; // series name -> [low, high] |
1866 | ||
354e15ab DE |
1867 | // Loop over all fields and create datasets |
1868 | for (var i = data[0].length - 1; i >= 1; i--) { | |
1cf11047 DV |
1869 | if (!this.visibility()[i - 1]) continue; |
1870 | ||
f09fc545 | 1871 | var seriesName = this.attr_("labels")[i]; |
450fe64b DV |
1872 | var connectSeparatedPoints = this.attr_('connectSeparatedPoints', i); |
1873 | ||
6a1aa64f DV |
1874 | var series = []; |
1875 | for (var j = 0; j < data.length; j++) { | |
4a634fc7 | 1876 | if (data[j][i] != null || !connectSeparatedPoints) { |
f032c51d | 1877 | var date = data[j][0]; |
563c70ca | 1878 | series.push([date, data[j][i]]); |
f032c51d | 1879 | } |
6a1aa64f | 1880 | } |
2f5e7e1a DV |
1881 | |
1882 | // TODO(danvk): move this into predraw_. It's insane to do it here. | |
6a1aa64f DV |
1883 | series = this.rollingAverage(series, this.rollPeriod_); |
1884 | ||
1885 | // Prune down to the desired range, if necessary (for zooming) | |
1a26f3fb DV |
1886 | // Because there can be lines going to points outside of the visible area, |
1887 | // we actually prune to visible points, plus one on either side. | |
9922b78b | 1888 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
6a1aa64f DV |
1889 | if (this.dateWindow_) { |
1890 | var low = this.dateWindow_[0]; | |
1891 | var high= this.dateWindow_[1]; | |
1892 | var pruned = []; | |
1a26f3fb DV |
1893 | // TODO(danvk): do binary search instead of linear search. |
1894 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. | |
1895 | var firstIdx = null, lastIdx = null; | |
6a1aa64f | 1896 | for (var k = 0; k < series.length; k++) { |
1a26f3fb DV |
1897 | if (series[k][0] >= low && firstIdx === null) { |
1898 | firstIdx = k; | |
1899 | } | |
1900 | if (series[k][0] <= high) { | |
1901 | lastIdx = k; | |
6a1aa64f DV |
1902 | } |
1903 | } | |
1a26f3fb DV |
1904 | if (firstIdx === null) firstIdx = 0; |
1905 | if (firstIdx > 0) firstIdx--; | |
1906 | if (lastIdx === null) lastIdx = series.length - 1; | |
1907 | if (lastIdx < series.length - 1) lastIdx++; | |
16269f6e | 1908 | this.boundaryIds_[i-1] = [firstIdx, lastIdx]; |
1a26f3fb DV |
1909 | for (var k = firstIdx; k <= lastIdx; k++) { |
1910 | pruned.push(series[k]); | |
6a1aa64f DV |
1911 | } |
1912 | series = pruned; | |
16269f6e NAG |
1913 | } else { |
1914 | this.boundaryIds_[i-1] = [0, series.length-1]; | |
6a1aa64f DV |
1915 | } |
1916 | ||
f09fc545 | 1917 | var seriesExtremes = this.extremeValues_(series); |
5011e7a1 | 1918 | |
6a1aa64f | 1919 | if (bars) { |
354e15ab DE |
1920 | for (var j=0; j<series.length; j++) { |
1921 | val = [series[j][0], series[j][1][0], series[j][1][1], series[j][1][2]]; | |
1922 | series[j] = val; | |
1923 | } | |
43af96e7 | 1924 | } else if (this.attr_("stackedGraph")) { |
43af96e7 NK |
1925 | var l = series.length; |
1926 | var actual_y; | |
1927 | for (var j = 0; j < l; j++) { | |
354e15ab DE |
1928 | // If one data set has a NaN, let all subsequent stacked |
1929 | // sets inherit the NaN -- only start at 0 for the first set. | |
1930 | var x = series[j][0]; | |
41b0f691 | 1931 | if (cumulative_y[x] === undefined) { |
354e15ab | 1932 | cumulative_y[x] = 0; |
41b0f691 | 1933 | } |
43af96e7 NK |
1934 | |
1935 | actual_y = series[j][1]; | |
354e15ab | 1936 | cumulative_y[x] += actual_y; |
43af96e7 | 1937 | |
354e15ab | 1938 | series[j] = [x, cumulative_y[x]] |
43af96e7 | 1939 | |
41b0f691 DV |
1940 | if (cumulative_y[x] > seriesExtremes[1]) { |
1941 | seriesExtremes[1] = cumulative_y[x]; | |
1942 | } | |
1943 | if (cumulative_y[x] < seriesExtremes[0]) { | |
1944 | seriesExtremes[0] = cumulative_y[x]; | |
1945 | } | |
43af96e7 | 1946 | } |
6a1aa64f | 1947 | } |
41b0f691 | 1948 | extremes[seriesName] = seriesExtremes; |
354e15ab DE |
1949 | |
1950 | datasets[i] = series; | |
6a1aa64f DV |
1951 | } |
1952 | ||
354e15ab | 1953 | for (var i = 1; i < datasets.length; i++) { |
4523c1f6 | 1954 | if (!this.visibility()[i - 1]) continue; |
354e15ab | 1955 | this.layout_.addDataset(this.attr_("labels")[i], datasets[i]); |
43af96e7 NK |
1956 | } |
1957 | ||
26ca7938 DV |
1958 | // TODO(danvk): this method doesn't need to return anything. |
1959 | var out = this.computeYAxisRanges_(extremes); | |
f09fc545 DV |
1960 | var axes = out[0]; |
1961 | var seriesToAxisMap = out[1]; | |
9012dd21 | 1962 | this.layout_.updateOptions( { yAxes: axes, |
ea4942ed | 1963 | seriesToAxisMap: seriesToAxisMap |
9012dd21 | 1964 | } ); |
f09fc545 | 1965 | |
6a1aa64f DV |
1966 | this.addXTicks_(); |
1967 | ||
1968 | // Tell PlotKit to use this new data and render itself | |
d033ae1c | 1969 | this.layout_.updateOptions({dateWindow: this.dateWindow_}); |
6a1aa64f DV |
1970 | this.layout_.evaluateWithError(); |
1971 | this.plotter_.clear(); | |
1972 | this.plotter_.render(); | |
f6401bf6 | 1973 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
2f5e7e1a | 1974 | this.canvas_.height); |
599fb4ad DV |
1975 | |
1976 | if (this.attr_("drawCallback") !== null) { | |
fe0b7c03 | 1977 | this.attr_("drawCallback")(this, is_initial_draw); |
599fb4ad | 1978 | } |
6a1aa64f DV |
1979 | }; |
1980 | ||
1981 | /** | |
26ca7938 DV |
1982 | * Determine properties of the y-axes which are independent of the data |
1983 | * currently being displayed. This includes things like the number of axes and | |
1984 | * the style of the axes. It does not include the range of each axis and its | |
1985 | * tick marks. | |
1986 | * This fills in this.axes_ and this.seriesToAxisMap_. | |
1987 | * axes_ = [ { options } ] | |
1988 | * seriesToAxisMap_ = { seriesName: 0, seriesName2: 1, ... } | |
1989 | * indices are into the axes_ array. | |
f09fc545 | 1990 | */ |
26ca7938 DV |
1991 | Dygraph.prototype.computeYAxes_ = function() { |
1992 | this.axes_ = [{}]; // always have at least one y-axis. | |
1993 | this.seriesToAxisMap_ = {}; | |
1994 | ||
1995 | // Get a list of series names. | |
1996 | var labels = this.attr_("labels"); | |
1c77a3a1 | 1997 | var series = {}; |
26ca7938 | 1998 | for (var i = 1; i < labels.length; i++) series[labels[i]] = (i - 1); |
f09fc545 DV |
1999 | |
2000 | // all options which could be applied per-axis: | |
2001 | var axisOptions = [ | |
2002 | 'includeZero', | |
2003 | 'valueRange', | |
2004 | 'labelsKMB', | |
2005 | 'labelsKMG2', | |
2006 | 'pixelsPerYLabel', | |
2007 | 'yAxisLabelWidth', | |
2008 | 'axisLabelFontSize', | |
2009 | 'axisTickSize' | |
2010 | ]; | |
2011 | ||
2012 | // Copy global axis options over to the first axis. | |
2013 | for (var i = 0; i < axisOptions.length; i++) { | |
2014 | var k = axisOptions[i]; | |
2015 | var v = this.attr_(k); | |
26ca7938 | 2016 | if (v) this.axes_[0][k] = v; |
f09fc545 DV |
2017 | } |
2018 | ||
2019 | // Go through once and add all the axes. | |
26ca7938 DV |
2020 | for (var seriesName in series) { |
2021 | if (!series.hasOwnProperty(seriesName)) continue; | |
f09fc545 DV |
2022 | var axis = this.attr_("axis", seriesName); |
2023 | if (axis == null) { | |
26ca7938 | 2024 | this.seriesToAxisMap_[seriesName] = 0; |
f09fc545 DV |
2025 | continue; |
2026 | } | |
2027 | if (typeof(axis) == 'object') { | |
2028 | // Add a new axis, making a copy of its per-axis options. | |
2029 | var opts = {}; | |
26ca7938 | 2030 | Dygraph.update(opts, this.axes_[0]); |
f09fc545 DV |
2031 | Dygraph.update(opts, { valueRange: null }); // shouldn't inherit this. |
2032 | Dygraph.update(opts, axis); | |
26ca7938 DV |
2033 | this.axes_.push(opts); |
2034 | this.seriesToAxisMap_[seriesName] = this.axes_.length - 1; | |
f09fc545 DV |
2035 | } |
2036 | } | |
2037 | ||
2038 | // Go through one more time and assign series to an axis defined by another | |
2039 | // series, e.g. { 'Y1: { axis: {} }, 'Y2': { axis: 'Y1' } } | |
26ca7938 DV |
2040 | for (var seriesName in series) { |
2041 | if (!series.hasOwnProperty(seriesName)) continue; | |
f09fc545 DV |
2042 | var axis = this.attr_("axis", seriesName); |
2043 | if (typeof(axis) == 'string') { | |
26ca7938 | 2044 | if (!this.seriesToAxisMap_.hasOwnProperty(axis)) { |
f09fc545 DV |
2045 | this.error("Series " + seriesName + " wants to share a y-axis with " + |
2046 | "series " + axis + ", which does not define its own axis."); | |
2047 | return null; | |
2048 | } | |
26ca7938 DV |
2049 | var idx = this.seriesToAxisMap_[axis]; |
2050 | this.seriesToAxisMap_[seriesName] = idx; | |
f09fc545 DV |
2051 | } |
2052 | } | |
1c77a3a1 DV |
2053 | |
2054 | // Now we remove series from seriesToAxisMap_ which are not visible. We do | |
2055 | // this last so that hiding the first series doesn't destroy the axis | |
2056 | // properties of the primary axis. | |
2057 | var seriesToAxisFiltered = {}; | |
2058 | var vis = this.visibility(); | |
2059 | for (var i = 1; i < labels.length; i++) { | |
2060 | var s = labels[i]; | |
2061 | if (vis[i - 1]) seriesToAxisFiltered[s] = this.seriesToAxisMap_[s]; | |
2062 | } | |
2063 | this.seriesToAxisMap_ = seriesToAxisFiltered; | |
26ca7938 DV |
2064 | }; |
2065 | ||
2066 | /** | |
2067 | * Returns the number of y-axes on the chart. | |
2068 | * @return {Number} the number of axes. | |
2069 | */ | |
2070 | Dygraph.prototype.numAxes = function() { | |
2071 | var last_axis = 0; | |
2072 | for (var series in this.seriesToAxisMap_) { | |
2073 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; | |
2074 | var idx = this.seriesToAxisMap_[series]; | |
2075 | if (idx > last_axis) last_axis = idx; | |
2076 | } | |
2077 | return 1 + last_axis; | |
2078 | }; | |
2079 | ||
2080 | /** | |
2081 | * Determine the value range and tick marks for each axis. | |
2082 | * @param {Object} extremes A mapping from seriesName -> [low, high] | |
2083 | * This fills in the valueRange and ticks fields in each entry of this.axes_. | |
2084 | */ | |
2085 | Dygraph.prototype.computeYAxisRanges_ = function(extremes) { | |
2086 | // Build a map from axis number -> [list of series names] | |
2087 | var seriesForAxis = []; | |
2088 | for (var series in this.seriesToAxisMap_) { | |
2089 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; | |
2090 | var idx = this.seriesToAxisMap_[series]; | |
2091 | while (seriesForAxis.length <= idx) seriesForAxis.push([]); | |
2092 | seriesForAxis[idx].push(series); | |
2093 | } | |
f09fc545 DV |
2094 | |
2095 | // Compute extreme values, a span and tick marks for each axis. | |
26ca7938 DV |
2096 | for (var i = 0; i < this.axes_.length; i++) { |
2097 | var axis = this.axes_[i]; | |
d58ae307 DV |
2098 | if (axis.valueWindow) { |
2099 | // This is only set if the user has zoomed on the y-axis. It is never set | |
2100 | // by a user. It takes precedence over axis.valueRange because, if you set | |
2101 | // valueRange, you'd still expect to be able to pan. | |
2102 | axis.computedValueRange = [axis.valueWindow[0], axis.valueWindow[1]]; | |
2103 | } else if (axis.valueRange) { | |
2104 | // This is a user-set value range for this axis. | |
26ca7938 DV |
2105 | axis.computedValueRange = [axis.valueRange[0], axis.valueRange[1]]; |
2106 | } else { | |
1c77a3a1 | 2107 | // Calculate the extremes of extremes. |
f09fc545 DV |
2108 | var series = seriesForAxis[i]; |
2109 | var minY = Infinity; // extremes[series[0]][0]; | |
2110 | var maxY = -Infinity; // extremes[series[0]][1]; | |
2111 | for (var j = 0; j < series.length; j++) { | |
2112 | minY = Math.min(extremes[series[j]][0], minY); | |
e3b6727e | 2113 | maxY = Math.max(extremes[series[j]][1], maxY); |
f09fc545 DV |
2114 | } |
2115 | if (axis.includeZero && minY > 0) minY = 0; | |
2116 | ||
2117 | // Add some padding and round up to an integer to be human-friendly. | |
2118 | var span = maxY - minY; | |
2119 | // special case: if we have no sense of scale, use +/-10% of the sole value. | |
2120 | if (span == 0) { span = maxY; } | |
2121 | var maxAxisY = maxY + 0.1 * span; | |
2122 | var minAxisY = minY - 0.1 * span; | |
2123 | ||
2124 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. | |
2f5e7e1a DV |
2125 | if (!this.attr_("avoidMinZero")) { |
2126 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; | |
2127 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
2128 | } | |
f09fc545 DV |
2129 | |
2130 | if (this.attr_("includeZero")) { | |
2131 | if (maxY < 0) maxAxisY = 0; | |
2132 | if (minY > 0) minAxisY = 0; | |
2133 | } | |
2134 | ||
26ca7938 | 2135 | axis.computedValueRange = [minAxisY, maxAxisY]; |
f09fc545 DV |
2136 | } |
2137 | ||
0d64e596 DV |
2138 | // Add ticks. By default, all axes inherit the tick positions of the |
2139 | // primary axis. However, if an axis is specifically marked as having | |
2140 | // independent ticks, then that is permissible as well. | |
2141 | if (i == 0 || axis.independentTicks) { | |
2142 | axis.ticks = | |
2143 | Dygraph.numericTicks(axis.computedValueRange[0], | |
2144 | axis.computedValueRange[1], | |
2145 | this, | |
2146 | axis); | |
2147 | } else { | |
2148 | var p_axis = this.axes_[0]; | |
2149 | var p_ticks = p_axis.ticks; | |
2150 | var p_scale = p_axis.computedValueRange[1] - p_axis.computedValueRange[0]; | |
2151 | var scale = axis.computedValueRange[1] - axis.computedValueRange[0]; | |
2152 | var tick_values = []; | |
2153 | for (var i = 0; i < p_ticks.length; i++) { | |
2154 | var y_frac = (p_ticks[i].v - p_axis.computedValueRange[0]) / p_scale; | |
2155 | var y_val = axis.computedValueRange[0] + y_frac * scale; | |
2156 | tick_values.push(y_val); | |
2157 | } | |
2158 | ||
2159 | axis.ticks = | |
2160 | Dygraph.numericTicks(axis.computedValueRange[0], | |
2161 | axis.computedValueRange[1], | |
2162 | this, axis, tick_values); | |
2163 | } | |
f09fc545 DV |
2164 | } |
2165 | ||
26ca7938 | 2166 | return [this.axes_, this.seriesToAxisMap_]; |
f09fc545 DV |
2167 | }; |
2168 | ||
2169 | /** | |
6a1aa64f DV |
2170 | * Calculates the rolling average of a data set. |
2171 | * If originalData is [label, val], rolls the average of those. | |
2172 | * If originalData is [label, [, it's interpreted as [value, stddev] | |
2173 | * and the roll is returned in the same form, with appropriately reduced | |
2174 | * stddev for each value. | |
2175 | * Note that this is where fractional input (i.e. '5/10') is converted into | |
2176 | * decimal values. | |
2177 | * @param {Array} originalData The data in the appropriate format (see above) | |
2178 | * @param {Number} rollPeriod The number of days over which to average the data | |
2179 | */ | |
285a6bda | 2180 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
6a1aa64f DV |
2181 | if (originalData.length < 2) |
2182 | return originalData; | |
2183 | var rollPeriod = Math.min(rollPeriod, originalData.length - 1); | |
2184 | var rollingData = []; | |
285a6bda | 2185 | var sigma = this.attr_("sigma"); |
6a1aa64f DV |
2186 | |
2187 | if (this.fractions_) { | |
2188 | var num = 0; | |
2189 | var den = 0; // numerator/denominator | |
2190 | var mult = 100.0; | |
2191 | for (var i = 0; i < originalData.length; i++) { | |
2192 | num += originalData[i][1][0]; | |
2193 | den += originalData[i][1][1]; | |
2194 | if (i - rollPeriod >= 0) { | |
2195 | num -= originalData[i - rollPeriod][1][0]; | |
2196 | den -= originalData[i - rollPeriod][1][1]; | |
2197 | } | |
2198 | ||
2199 | var date = originalData[i][0]; | |
2200 | var value = den ? num / den : 0.0; | |
285a6bda | 2201 | if (this.attr_("errorBars")) { |
6a1aa64f DV |
2202 | if (this.wilsonInterval_) { |
2203 | // For more details on this confidence interval, see: | |
2204 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval | |
2205 | if (den) { | |
2206 | var p = value < 0 ? 0 : value, n = den; | |
2207 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); | |
2208 | var denom = 1 + sigma * sigma / den; | |
2209 | var low = (p + sigma * sigma / (2 * den) - pm) / denom; | |
2210 | var high = (p + sigma * sigma / (2 * den) + pm) / denom; | |
2211 | rollingData[i] = [date, | |
2212 | [p * mult, (p - low) * mult, (high - p) * mult]]; | |
2213 | } else { | |
2214 | rollingData[i] = [date, [0, 0, 0]]; | |
2215 | } | |
2216 | } else { | |
2217 | var stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; | |
2218 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; | |
2219 | } | |
2220 | } else { | |
2221 | rollingData[i] = [date, mult * value]; | |
2222 | } | |
2223 | } | |
9922b78b | 2224 | } else if (this.attr_("customBars")) { |
f6885d6a DV |
2225 | var low = 0; |
2226 | var mid = 0; | |
2227 | var high = 0; | |
2228 | var count = 0; | |
6a1aa64f DV |
2229 | for (var i = 0; i < originalData.length; i++) { |
2230 | var data = originalData[i][1]; | |
2231 | var y = data[1]; | |
2232 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; | |
f6885d6a | 2233 | |
8b91c51f | 2234 | if (y != null && !isNaN(y)) { |
49a7d0d5 DV |
2235 | low += data[0]; |
2236 | mid += y; | |
2237 | high += data[2]; | |
2238 | count += 1; | |
2239 | } | |
f6885d6a DV |
2240 | if (i - rollPeriod >= 0) { |
2241 | var prev = originalData[i - rollPeriod]; | |
8b91c51f | 2242 | if (prev[1][1] != null && !isNaN(prev[1][1])) { |
49a7d0d5 DV |
2243 | low -= prev[1][0]; |
2244 | mid -= prev[1][1]; | |
2245 | high -= prev[1][2]; | |
2246 | count -= 1; | |
2247 | } | |
f6885d6a DV |
2248 | } |
2249 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, | |
2250 | 1.0 * (mid - low) / count, | |
2251 | 1.0 * (high - mid) / count ]]; | |
2769de62 | 2252 | } |
6a1aa64f DV |
2253 | } else { |
2254 | // Calculate the rolling average for the first rollPeriod - 1 points where | |
2255 | // there is not enough data to roll over the full number of days | |
2256 | var num_init_points = Math.min(rollPeriod - 1, originalData.length - 2); | |
285a6bda | 2257 | if (!this.attr_("errorBars")){ |
5011e7a1 DV |
2258 | if (rollPeriod == 1) { |
2259 | return originalData; | |
2260 | } | |
2261 | ||
2847c1cf | 2262 | for (var i = 0; i < originalData.length; i++) { |
6a1aa64f | 2263 | var sum = 0; |
5011e7a1 | 2264 | var num_ok = 0; |
2847c1cf DV |
2265 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
2266 | var y = originalData[j][1]; | |
8b91c51f | 2267 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 2268 | num_ok++; |
2847c1cf | 2269 | sum += originalData[j][1]; |
6a1aa64f | 2270 | } |
5011e7a1 | 2271 | if (num_ok) { |
2847c1cf | 2272 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
5011e7a1 | 2273 | } else { |
2847c1cf | 2274 | rollingData[i] = [originalData[i][0], null]; |
5011e7a1 | 2275 | } |
6a1aa64f | 2276 | } |
2847c1cf DV |
2277 | |
2278 | } else { | |
2279 | for (var i = 0; i < originalData.length; i++) { | |
6a1aa64f DV |
2280 | var sum = 0; |
2281 | var variance = 0; | |
5011e7a1 | 2282 | var num_ok = 0; |
2847c1cf | 2283 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
5011e7a1 | 2284 | var y = originalData[j][1][0]; |
8b91c51f | 2285 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 2286 | num_ok++; |
6a1aa64f DV |
2287 | sum += originalData[j][1][0]; |
2288 | variance += Math.pow(originalData[j][1][1], 2); | |
2289 | } | |
5011e7a1 DV |
2290 | if (num_ok) { |
2291 | var stddev = Math.sqrt(variance) / num_ok; | |
2292 | rollingData[i] = [originalData[i][0], | |
2293 | [sum / num_ok, sigma * stddev, sigma * stddev]]; | |
2294 | } else { | |
2295 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
2296 | } | |
6a1aa64f DV |
2297 | } |
2298 | } | |
2299 | } | |
2300 | ||
2301 | return rollingData; | |
2302 | }; | |
2303 | ||
2304 | /** | |
2305 | * Parses a date, returning the number of milliseconds since epoch. This can be | |
285a6bda DV |
2306 | * passed in as an xValueParser in the Dygraph constructor. |
2307 | * TODO(danvk): enumerate formats that this understands. | |
6a1aa64f DV |
2308 | * @param {String} A date in YYYYMMDD format. |
2309 | * @return {Number} Milliseconds since epoch. | |
2310 | * @public | |
2311 | */ | |
285a6bda | 2312 | Dygraph.dateParser = function(dateStr, self) { |
6a1aa64f | 2313 | var dateStrSlashed; |
285a6bda | 2314 | var d; |
986a5026 | 2315 | if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12' |
6a1aa64f | 2316 | dateStrSlashed = dateStr.replace("-", "/", "g"); |
353a0294 DV |
2317 | while (dateStrSlashed.search("-") != -1) { |
2318 | dateStrSlashed = dateStrSlashed.replace("-", "/"); | |
2319 | } | |
285a6bda | 2320 | d = Date.parse(dateStrSlashed); |
2769de62 | 2321 | } else if (dateStr.length == 8) { // e.g. '20090712' |
285a6bda | 2322 | // TODO(danvk): remove support for this format. It's confusing. |
6a1aa64f DV |
2323 | dateStrSlashed = dateStr.substr(0,4) + "/" + dateStr.substr(4,2) |
2324 | + "/" + dateStr.substr(6,2); | |
285a6bda | 2325 | d = Date.parse(dateStrSlashed); |
2769de62 DV |
2326 | } else { |
2327 | // Any format that Date.parse will accept, e.g. "2009/07/12" or | |
2328 | // "2009/07/12 12:34:56" | |
285a6bda DV |
2329 | d = Date.parse(dateStr); |
2330 | } | |
2331 | ||
2332 | if (!d || isNaN(d)) { | |
2333 | self.error("Couldn't parse " + dateStr + " as a date"); | |
2334 | } | |
2335 | return d; | |
2336 | }; | |
2337 | ||
2338 | /** | |
2339 | * Detects the type of the str (date or numeric) and sets the various | |
2340 | * formatting attributes in this.attrs_ based on this type. | |
2341 | * @param {String} str An x value. | |
2342 | * @private | |
2343 | */ | |
2344 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
2345 | var isDate = false; | |
2346 | if (str.indexOf('-') >= 0 || | |
2347 | str.indexOf('/') >= 0 || | |
2348 | isNaN(parseFloat(str))) { | |
2349 | isDate = true; | |
2350 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
2351 | // TODO(danvk): remove support for this format. | |
2352 | isDate = true; | |
2353 | } | |
2354 | ||
2355 | if (isDate) { | |
2356 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
2357 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2358 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2359 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
2360 | } else { |
2361 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
2362 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
2363 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2364 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
6a1aa64f | 2365 | } |
6a1aa64f DV |
2366 | }; |
2367 | ||
2368 | /** | |
2369 | * Parses a string in a special csv format. We expect a csv file where each | |
2370 | * line is a date point, and the first field in each line is the date string. | |
2371 | * We also expect that all remaining fields represent series. | |
285a6bda | 2372 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f DV |
2373 | * date, series1, stddev1, series2, stddev2, ... |
2374 | * @param {Array.<Object>} data See above. | |
2375 | * @private | |
285a6bda DV |
2376 | * |
2377 | * @return Array.<Object> An array with one entry for each row. These entries | |
2378 | * are an array of cells in that row. The first entry is the parsed x-value for | |
2379 | * the row. The second, third, etc. are the y-values. These can take on one of | |
2380 | * three forms, depending on the CSV and constructor parameters: | |
2381 | * 1. numeric value | |
2382 | * 2. [ value, stddev ] | |
2383 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 2384 | */ |
285a6bda | 2385 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f DV |
2386 | var ret = []; |
2387 | var lines = data.split("\n"); | |
3d67f03b DV |
2388 | |
2389 | // Use the default delimiter or fall back to a tab if that makes sense. | |
2390 | var delim = this.attr_('delimiter'); | |
2391 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { | |
2392 | delim = '\t'; | |
2393 | } | |
2394 | ||
285a6bda | 2395 | var start = 0; |
6a1aa64f | 2396 | if (this.labelsFromCSV_) { |
285a6bda | 2397 | start = 1; |
3d67f03b | 2398 | this.attrs_.labels = lines[0].split(delim); |
6a1aa64f DV |
2399 | } |
2400 | ||
03b522a4 DV |
2401 | // Parse the x as a float or return null if it's not a number. |
2402 | var parseFloatOrNull = function(x) { | |
41333ec0 DV |
2403 | var val = parseFloat(x); |
2404 | return isNaN(val) ? null : val; | |
03b522a4 DV |
2405 | }; |
2406 | ||
285a6bda DV |
2407 | var xParser; |
2408 | var defaultParserSet = false; // attempt to auto-detect x value type | |
2409 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 2410 | var outOfOrder = false; |
6a1aa64f DV |
2411 | for (var i = start; i < lines.length; i++) { |
2412 | var line = lines[i]; | |
2413 | if (line.length == 0) continue; // skip blank lines | |
3d67f03b DV |
2414 | if (line[0] == '#') continue; // skip comment lines |
2415 | var inFields = line.split(delim); | |
285a6bda | 2416 | if (inFields.length < 2) continue; |
6a1aa64f DV |
2417 | |
2418 | var fields = []; | |
285a6bda DV |
2419 | if (!defaultParserSet) { |
2420 | this.detectTypeFromString_(inFields[0]); | |
2421 | xParser = this.attr_("xValueParser"); | |
2422 | defaultParserSet = true; | |
2423 | } | |
2424 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
2425 | |
2426 | // If fractions are expected, parse the numbers as "A/B" | |
2427 | if (this.fractions_) { | |
2428 | for (var j = 1; j < inFields.length; j++) { | |
2429 | // TODO(danvk): figure out an appropriate way to flag parse errors. | |
2430 | var vals = inFields[j].split("/"); | |
03b522a4 | 2431 | fields[j] = [parseFloatOrNull(vals[0]), parseFloatOrNull(vals[1])]; |
6a1aa64f | 2432 | } |
285a6bda | 2433 | } else if (this.attr_("errorBars")) { |
6a1aa64f DV |
2434 | // If there are error bars, values are (value, stddev) pairs |
2435 | for (var j = 1; j < inFields.length; j += 2) | |
03b522a4 DV |
2436 | fields[(j + 1) / 2] = [parseFloatOrNull(inFields[j]), |
2437 | parseFloatOrNull(inFields[j + 1])]; | |
9922b78b | 2438 | } else if (this.attr_("customBars")) { |
6a1aa64f DV |
2439 | // Bars are a low;center;high tuple |
2440 | for (var j = 1; j < inFields.length; j++) { | |
2441 | var vals = inFields[j].split(";"); | |
03b522a4 DV |
2442 | fields[j] = [ parseFloatOrNull(vals[0]), |
2443 | parseFloatOrNull(vals[1]), | |
2444 | parseFloatOrNull(vals[2]) ]; | |
6a1aa64f DV |
2445 | } |
2446 | } else { | |
2447 | // Values are just numbers | |
285a6bda | 2448 | for (var j = 1; j < inFields.length; j++) { |
03b522a4 | 2449 | fields[j] = parseFloatOrNull(inFields[j]); |
285a6bda | 2450 | } |
6a1aa64f | 2451 | } |
987840a2 DV |
2452 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
2453 | outOfOrder = true; | |
2454 | } | |
6a1aa64f | 2455 | ret.push(fields); |
285a6bda DV |
2456 | |
2457 | if (fields.length != expectedCols) { | |
2458 | this.error("Number of columns in line " + i + " (" + fields.length + | |
2459 | ") does not agree with number of labels (" + expectedCols + | |
2460 | ") " + line); | |
2461 | } | |
6a1aa64f | 2462 | } |
987840a2 DV |
2463 | |
2464 | if (outOfOrder) { | |
2465 | this.warn("CSV is out of order; order it correctly to speed loading."); | |
2466 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2467 | } | |
2468 | ||
6a1aa64f DV |
2469 | return ret; |
2470 | }; | |
2471 | ||
2472 | /** | |
285a6bda DV |
2473 | * The user has provided their data as a pre-packaged JS array. If the x values |
2474 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
2475 | * are dates, we need to convert them from Date objects to ms since epoch. | |
2476 | * @param {Array.<Object>} data | |
2477 | * @return {Array.<Object>} data with numeric x values. | |
2478 | */ | |
2479 | Dygraph.prototype.parseArray_ = function(data) { | |
2480 | // Peek at the first x value to see if it's numeric. | |
2481 | if (data.length == 0) { | |
2482 | this.error("Can't plot empty data set"); | |
2483 | return null; | |
2484 | } | |
2485 | if (data[0].length == 0) { | |
2486 | this.error("Data set cannot contain an empty row"); | |
2487 | return null; | |
2488 | } | |
2489 | ||
2490 | if (this.attr_("labels") == null) { | |
2491 | this.warn("Using default labels. Set labels explicitly via 'labels' " + | |
2492 | "in the options parameter"); | |
2493 | this.attrs_.labels = [ "X" ]; | |
2494 | for (var i = 1; i < data[0].length; i++) { | |
2495 | this.attrs_.labels.push("Y" + i); | |
2496 | } | |
2497 | } | |
2498 | ||
2dda3850 | 2499 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda DV |
2500 | // Some intelligent defaults for a date x-axis. |
2501 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
bf640e56 | 2502 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
2503 | this.attrs_.xTicker = Dygraph.dateTicker; |
2504 | ||
2505 | // Assume they're all dates. | |
e3ab7b40 | 2506 | var parsedData = Dygraph.clone(data); |
285a6bda DV |
2507 | for (var i = 0; i < data.length; i++) { |
2508 | if (parsedData[i].length == 0) { | |
a323ff4a | 2509 | this.error("Row " + (1 + i) + " of data is empty"); |
285a6bda DV |
2510 | return null; |
2511 | } | |
2512 | if (parsedData[i][0] == null | |
3a909ec5 DV |
2513 | || typeof(parsedData[i][0].getTime) != 'function' |
2514 | || isNaN(parsedData[i][0].getTime())) { | |
be96a1f5 | 2515 | this.error("x value in row " + (1 + i) + " is not a Date"); |
285a6bda DV |
2516 | return null; |
2517 | } | |
2518 | parsedData[i][0] = parsedData[i][0].getTime(); | |
2519 | } | |
2520 | return parsedData; | |
2521 | } else { | |
2522 | // Some intelligent defaults for a numeric x-axis. | |
2523 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
2524 | this.attrs_.xTicker = Dygraph.numericTicks; | |
2525 | return data; | |
2526 | } | |
2527 | }; | |
2528 | ||
2529 | /** | |
79420a1e DV |
2530 | * Parses a DataTable object from gviz. |
2531 | * The data is expected to have a first column that is either a date or a | |
2532 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
2533 | * between this.xValueParser_ and the type of the first column, it will be | |
a685723c | 2534 | * fixed. Fills out rawData_. |
79420a1e DV |
2535 | * @param {Array.<Object>} data See above. |
2536 | * @private | |
2537 | */ | |
285a6bda | 2538 | Dygraph.prototype.parseDataTable_ = function(data) { |
79420a1e DV |
2539 | var cols = data.getNumberOfColumns(); |
2540 | var rows = data.getNumberOfRows(); | |
2541 | ||
d955e223 | 2542 | var indepType = data.getColumnType(0); |
4440f6c8 | 2543 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda DV |
2544 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
2545 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2546 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2547 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
33127159 | 2548 | } else if (indepType == 'number') { |
285a6bda DV |
2549 | this.attrs_.xValueFormatter = function(x) { return x; }; |
2550 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
2551 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2552 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
285a6bda | 2553 | } else { |
987840a2 DV |
2554 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
2555 | "column 1 of DataTable input (Got '" + indepType + "')"); | |
79420a1e DV |
2556 | return null; |
2557 | } | |
2558 | ||
a685723c DV |
2559 | // Array of the column indices which contain data (and not annotations). |
2560 | var colIdx = []; | |
2561 | var annotationCols = {}; // data index -> [annotation cols] | |
2562 | var hasAnnotations = false; | |
2563 | for (var i = 1; i < cols; i++) { | |
2564 | var type = data.getColumnType(i); | |
2565 | if (type == 'number') { | |
2566 | colIdx.push(i); | |
2567 | } else if (type == 'string' && this.attr_('displayAnnotations')) { | |
2568 | // This is OK -- it's an annotation column. | |
2569 | var dataIdx = colIdx[colIdx.length - 1]; | |
2570 | if (!annotationCols.hasOwnProperty(dataIdx)) { | |
2571 | annotationCols[dataIdx] = [i]; | |
2572 | } else { | |
2573 | annotationCols[dataIdx].push(i); | |
2574 | } | |
2575 | hasAnnotations = true; | |
2576 | } else { | |
2577 | this.error("Only 'number' is supported as a dependent type with Gviz." + | |
2578 | " 'string' is only supported if displayAnnotations is true"); | |
2579 | } | |
2580 | } | |
2581 | ||
2582 | // Read column labels | |
2583 | // TODO(danvk): add support back for errorBars | |
2584 | var labels = [data.getColumnLabel(0)]; | |
2585 | for (var i = 0; i < colIdx.length; i++) { | |
2586 | labels.push(data.getColumnLabel(colIdx[i])); | |
f9348814 | 2587 | if (this.attr_("errorBars")) i += 1; |
a685723c DV |
2588 | } |
2589 | this.attrs_.labels = labels; | |
2590 | cols = labels.length; | |
2591 | ||
79420a1e | 2592 | var ret = []; |
987840a2 | 2593 | var outOfOrder = false; |
a685723c | 2594 | var annotations = []; |
79420a1e DV |
2595 | for (var i = 0; i < rows; i++) { |
2596 | var row = []; | |
debe4434 DV |
2597 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
2598 | data.getValue(i, 0) === null) { | |
129569a5 FD |
2599 | this.warn("Ignoring row " + i + |
2600 | " of DataTable because of undefined or null first column."); | |
debe4434 DV |
2601 | continue; |
2602 | } | |
2603 | ||
c21d2c2d | 2604 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
2605 | row.push(data.getValue(i, 0).getTime()); |
2606 | } else { | |
2607 | row.push(data.getValue(i, 0)); | |
2608 | } | |
3e3f84e4 | 2609 | if (!this.attr_("errorBars")) { |
a685723c DV |
2610 | for (var j = 0; j < colIdx.length; j++) { |
2611 | var col = colIdx[j]; | |
2612 | row.push(data.getValue(i, col)); | |
2613 | if (hasAnnotations && | |
2614 | annotationCols.hasOwnProperty(col) && | |
2615 | data.getValue(i, annotationCols[col][0]) != null) { | |
2616 | var ann = {}; | |
2617 | ann.series = data.getColumnLabel(col); | |
2618 | ann.xval = row[0]; | |
2619 | ann.shortText = String.fromCharCode(65 /* A */ + annotations.length) | |
2620 | ann.text = ''; | |
2621 | for (var k = 0; k < annotationCols[col].length; k++) { | |
2622 | if (k) ann.text += "\n"; | |
2623 | ann.text += data.getValue(i, annotationCols[col][k]); | |
2624 | } | |
2625 | annotations.push(ann); | |
2626 | } | |
3e3f84e4 DV |
2627 | } |
2628 | } else { | |
2629 | for (var j = 0; j < cols - 1; j++) { | |
2630 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); | |
2631 | } | |
79420a1e | 2632 | } |
987840a2 DV |
2633 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
2634 | outOfOrder = true; | |
2635 | } | |
243d96e8 | 2636 | ret.push(row); |
79420a1e | 2637 | } |
987840a2 DV |
2638 | |
2639 | if (outOfOrder) { | |
2640 | this.warn("DataTable is out of order; order it correctly to speed loading."); | |
2641 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2642 | } | |
a685723c DV |
2643 | this.rawData_ = ret; |
2644 | ||
2645 | if (annotations.length > 0) { | |
2646 | this.setAnnotations(annotations, true); | |
2647 | } | |
79420a1e DV |
2648 | } |
2649 | ||
24e5350c | 2650 | // These functions are all based on MochiKit. |
fc80a396 DV |
2651 | Dygraph.update = function (self, o) { |
2652 | if (typeof(o) != 'undefined' && o !== null) { | |
2653 | for (var k in o) { | |
85b99f0b DV |
2654 | if (o.hasOwnProperty(k)) { |
2655 | self[k] = o[k]; | |
2656 | } | |
fc80a396 DV |
2657 | } |
2658 | } | |
2659 | return self; | |
2660 | }; | |
2661 | ||
2dda3850 DV |
2662 | Dygraph.isArrayLike = function (o) { |
2663 | var typ = typeof(o); | |
2664 | if ( | |
c21d2c2d | 2665 | (typ != 'object' && !(typ == 'function' && |
2dda3850 DV |
2666 | typeof(o.item) == 'function')) || |
2667 | o === null || | |
2668 | typeof(o.length) != 'number' || | |
2669 | o.nodeType === 3 | |
2670 | ) { | |
2671 | return false; | |
2672 | } | |
2673 | return true; | |
2674 | }; | |
2675 | ||
2676 | Dygraph.isDateLike = function (o) { | |
2677 | if (typeof(o) != "object" || o === null || | |
2678 | typeof(o.getTime) != 'function') { | |
2679 | return false; | |
2680 | } | |
2681 | return true; | |
2682 | }; | |
2683 | ||
e3ab7b40 DV |
2684 | Dygraph.clone = function(o) { |
2685 | // TODO(danvk): figure out how MochiKit's version works | |
2686 | var r = []; | |
2687 | for (var i = 0; i < o.length; i++) { | |
2688 | if (Dygraph.isArrayLike(o[i])) { | |
2689 | r.push(Dygraph.clone(o[i])); | |
2690 | } else { | |
2691 | r.push(o[i]); | |
2692 | } | |
2693 | } | |
2694 | return r; | |
24e5350c DV |
2695 | }; |
2696 | ||
2dda3850 | 2697 | |
79420a1e | 2698 | /** |
6a1aa64f DV |
2699 | * Get the CSV data. If it's in a function, call that function. If it's in a |
2700 | * file, do an XMLHttpRequest to get it. | |
2701 | * @private | |
2702 | */ | |
285a6bda | 2703 | Dygraph.prototype.start_ = function() { |
6a1aa64f | 2704 | if (typeof this.file_ == 'function') { |
285a6bda | 2705 | // CSV string. Pretend we got it via XHR. |
6a1aa64f | 2706 | this.loadedEvent_(this.file_()); |
2dda3850 | 2707 | } else if (Dygraph.isArrayLike(this.file_)) { |
285a6bda | 2708 | this.rawData_ = this.parseArray_(this.file_); |
26ca7938 | 2709 | this.predraw_(); |
79420a1e DV |
2710 | } else if (typeof this.file_ == 'object' && |
2711 | typeof this.file_.getColumnRange == 'function') { | |
2712 | // must be a DataTable from gviz. | |
a685723c | 2713 | this.parseDataTable_(this.file_); |
26ca7938 | 2714 | this.predraw_(); |
285a6bda DV |
2715 | } else if (typeof this.file_ == 'string') { |
2716 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. | |
2717 | if (this.file_.indexOf('\n') >= 0) { | |
2718 | this.loadedEvent_(this.file_); | |
2719 | } else { | |
2720 | var req = new XMLHttpRequest(); | |
2721 | var caller = this; | |
2722 | req.onreadystatechange = function () { | |
2723 | if (req.readyState == 4) { | |
2724 | if (req.status == 200) { | |
2725 | caller.loadedEvent_(req.responseText); | |
2726 | } | |
6a1aa64f | 2727 | } |
285a6bda | 2728 | }; |
6a1aa64f | 2729 | |
285a6bda DV |
2730 | req.open("GET", this.file_, true); |
2731 | req.send(null); | |
2732 | } | |
2733 | } else { | |
2734 | this.error("Unknown data format: " + (typeof this.file_)); | |
6a1aa64f DV |
2735 | } |
2736 | }; | |
2737 | ||
2738 | /** | |
2739 | * Changes various properties of the graph. These can include: | |
2740 | * <ul> | |
2741 | * <li>file: changes the source data for the graph</li> | |
2742 | * <li>errorBars: changes whether the data contains stddev</li> | |
2743 | * </ul> | |
2744 | * @param {Object} attrs The new properties and values | |
2745 | */ | |
285a6bda DV |
2746 | Dygraph.prototype.updateOptions = function(attrs) { |
2747 | // TODO(danvk): this is a mess. Rethink this function. | |
c65f2303 | 2748 | if ('rollPeriod' in attrs) { |
6a1aa64f DV |
2749 | this.rollPeriod_ = attrs.rollPeriod; |
2750 | } | |
c65f2303 | 2751 | if ('dateWindow' in attrs) { |
6a1aa64f DV |
2752 | this.dateWindow_ = attrs.dateWindow; |
2753 | } | |
450fe64b DV |
2754 | |
2755 | // TODO(danvk): validate per-series options. | |
46dde5f9 DV |
2756 | // Supported: |
2757 | // strokeWidth | |
2758 | // pointSize | |
2759 | // drawPoints | |
2760 | // highlightCircleSize | |
450fe64b | 2761 | |
fc80a396 | 2762 | Dygraph.update(this.user_attrs_, attrs); |
87bb7958 | 2763 | Dygraph.update(this.renderOptions_, attrs); |
285a6bda DV |
2764 | |
2765 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
2766 | ||
2767 | // TODO(danvk): this doesn't match the constructor logic | |
2768 | this.layout_.updateOptions({ 'errorBars': this.attr_("errorBars") }); | |
5e50289f | 2769 | if (attrs['file']) { |
6a1aa64f DV |
2770 | this.file_ = attrs['file']; |
2771 | this.start_(); | |
2772 | } else { | |
26ca7938 | 2773 | this.predraw_(); |
6a1aa64f DV |
2774 | } |
2775 | }; | |
2776 | ||
2777 | /** | |
697e70b2 DV |
2778 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
2779 | * containing div (which has presumably changed size since the dygraph was | |
2780 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
2781 | * |
2782 | * This is far more efficient than destroying and re-instantiating a | |
2783 | * Dygraph, since it doesn't have to reparse the underlying data. | |
2784 | * | |
697e70b2 DV |
2785 | * @param {Number} width Width (in pixels) |
2786 | * @param {Number} height Height (in pixels) | |
2787 | */ | |
2788 | Dygraph.prototype.resize = function(width, height) { | |
e8c7ef86 DV |
2789 | if (this.resize_lock) { |
2790 | return; | |
2791 | } | |
2792 | this.resize_lock = true; | |
2793 | ||
697e70b2 DV |
2794 | if ((width === null) != (height === null)) { |
2795 | this.warn("Dygraph.resize() should be called with zero parameters or " + | |
2796 | "two non-NULL parameters. Pretending it was zero."); | |
2797 | width = height = null; | |
2798 | } | |
2799 | ||
b16e6369 | 2800 | // TODO(danvk): there should be a clear() method. |
697e70b2 | 2801 | this.maindiv_.innerHTML = ""; |
b16e6369 DV |
2802 | this.attrs_.labelsDiv = null; |
2803 | ||
697e70b2 DV |
2804 | if (width) { |
2805 | this.maindiv_.style.width = width + "px"; | |
2806 | this.maindiv_.style.height = height + "px"; | |
2807 | this.width_ = width; | |
2808 | this.height_ = height; | |
2809 | } else { | |
2810 | this.width_ = this.maindiv_.offsetWidth; | |
2811 | this.height_ = this.maindiv_.offsetHeight; | |
2812 | } | |
2813 | ||
2814 | this.createInterface_(); | |
26ca7938 | 2815 | this.predraw_(); |
e8c7ef86 DV |
2816 | |
2817 | this.resize_lock = false; | |
697e70b2 DV |
2818 | }; |
2819 | ||
2820 | /** | |
6a1aa64f DV |
2821 | * Adjusts the number of days in the rolling average. Updates the graph to |
2822 | * reflect the new averaging period. | |
2823 | * @param {Number} length Number of days over which to average the data. | |
2824 | */ | |
285a6bda | 2825 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f | 2826 | this.rollPeriod_ = length; |
26ca7938 | 2827 | this.predraw_(); |
6a1aa64f | 2828 | }; |
540d00f1 | 2829 | |
f8cfec73 | 2830 | /** |
1cf11047 DV |
2831 | * Returns a boolean array of visibility statuses. |
2832 | */ | |
2833 | Dygraph.prototype.visibility = function() { | |
2834 | // Do lazy-initialization, so that this happens after we know the number of | |
2835 | // data series. | |
2836 | if (!this.attr_("visibility")) { | |
f38dec01 | 2837 | this.attrs_["visibility"] = []; |
1cf11047 DV |
2838 | } |
2839 | while (this.attr_("visibility").length < this.rawData_[0].length - 1) { | |
f38dec01 | 2840 | this.attr_("visibility").push(true); |
1cf11047 DV |
2841 | } |
2842 | return this.attr_("visibility"); | |
2843 | }; | |
2844 | ||
2845 | /** | |
2846 | * Changes the visiblity of a series. | |
2847 | */ | |
2848 | Dygraph.prototype.setVisibility = function(num, value) { | |
2849 | var x = this.visibility(); | |
a6c109c1 | 2850 | if (num < 0 || num >= x.length) { |
1cf11047 DV |
2851 | this.warn("invalid series number in setVisibility: " + num); |
2852 | } else { | |
2853 | x[num] = value; | |
26ca7938 | 2854 | this.predraw_(); |
1cf11047 DV |
2855 | } |
2856 | }; | |
2857 | ||
2858 | /** | |
5c528fa2 DV |
2859 | * Update the list of annotations and redraw the chart. |
2860 | */ | |
a685723c | 2861 | Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { |
3c51ab74 DV |
2862 | // Only add the annotation CSS rule once we know it will be used. |
2863 | Dygraph.addAnnotationRule(); | |
5c528fa2 DV |
2864 | this.annotations_ = ann; |
2865 | this.layout_.setAnnotations(this.annotations_); | |
a685723c | 2866 | if (!suppressDraw) { |
26ca7938 | 2867 | this.predraw_(); |
a685723c | 2868 | } |
5c528fa2 DV |
2869 | }; |
2870 | ||
2871 | /** | |
2872 | * Return the list of annotations. | |
2873 | */ | |
2874 | Dygraph.prototype.annotations = function() { | |
2875 | return this.annotations_; | |
2876 | }; | |
2877 | ||
46dde5f9 DV |
2878 | /** |
2879 | * Get the index of a series (column) given its name. The first column is the | |
2880 | * x-axis, so the data series start with index 1. | |
2881 | */ | |
2882 | Dygraph.prototype.indexFromSetName = function(name) { | |
2883 | var labels = this.attr_("labels"); | |
2884 | for (var i = 0; i < labels.length; i++) { | |
2885 | if (labels[i] == name) return i; | |
2886 | } | |
2887 | return null; | |
2888 | }; | |
2889 | ||
5c528fa2 DV |
2890 | Dygraph.addAnnotationRule = function() { |
2891 | if (Dygraph.addedAnnotationCSS) return; | |
2892 | ||
5c528fa2 DV |
2893 | var rule = "border: 1px solid black; " + |
2894 | "background-color: white; " + | |
2895 | "text-align: center;"; | |
22186871 DV |
2896 | |
2897 | var styleSheetElement = document.createElement("style"); | |
2898 | styleSheetElement.type = "text/css"; | |
2899 | document.getElementsByTagName("head")[0].appendChild(styleSheetElement); | |
2900 | ||
2901 | // Find the first style sheet that we can access. | |
2902 | // We may not add a rule to a style sheet from another domain for security | |
2903 | // reasons. This sometimes comes up when using gviz, since the Google gviz JS | |
2904 | // adds its own style sheets from google.com. | |
2905 | for (var i = 0; i < document.styleSheets.length; i++) { | |
2906 | if (document.styleSheets[i].disabled) continue; | |
2907 | var mysheet = document.styleSheets[i]; | |
2908 | try { | |
2909 | if (mysheet.insertRule) { // Firefox | |
2910 | var idx = mysheet.cssRules ? mysheet.cssRules.length : 0; | |
2911 | mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", idx); | |
2912 | } else if (mysheet.addRule) { // IE | |
2913 | mysheet.addRule(".dygraphDefaultAnnotation", rule); | |
2914 | } | |
2915 | Dygraph.addedAnnotationCSS = true; | |
2916 | return; | |
2917 | } catch(err) { | |
2918 | // Was likely a security exception. | |
2919 | } | |
5c528fa2 DV |
2920 | } |
2921 | ||
22186871 | 2922 | this.warn("Unable to add default annotation CSS rule; display may be off."); |
5c528fa2 DV |
2923 | } |
2924 | ||
2925 | /** | |
f8cfec73 DV |
2926 | * Create a new canvas element. This is more complex than a simple |
2927 | * document.createElement("canvas") because of IE and excanvas. | |
2928 | */ | |
2929 | Dygraph.createCanvas = function() { | |
2930 | var canvas = document.createElement("canvas"); | |
2931 | ||
2932 | isIE = (/MSIE/.test(navigator.userAgent) && !window.opera); | |
8b8f2d59 | 2933 | if (isIE && (typeof(G_vmlCanvasManager) != 'undefined')) { |
f8cfec73 DV |
2934 | canvas = G_vmlCanvasManager.initElement(canvas); |
2935 | } | |
2936 | ||
2937 | return canvas; | |
2938 | }; | |
2939 | ||
540d00f1 DV |
2940 | |
2941 | /** | |
285a6bda | 2942 | * A wrapper around Dygraph that implements the gviz API. |
540d00f1 DV |
2943 | * @param {Object} container The DOM object the visualization should live in. |
2944 | */ | |
285a6bda | 2945 | Dygraph.GVizChart = function(container) { |
540d00f1 DV |
2946 | this.container = container; |
2947 | } | |
2948 | ||
285a6bda | 2949 | Dygraph.GVizChart.prototype.draw = function(data, options) { |
c91f4ae8 DV |
2950 | // Clear out any existing dygraph. |
2951 | // TODO(danvk): would it make more sense to simply redraw using the current | |
2952 | // date_graph object? | |
540d00f1 | 2953 | this.container.innerHTML = ''; |
c91f4ae8 DV |
2954 | if (typeof(this.date_graph) != 'undefined') { |
2955 | this.date_graph.destroy(); | |
2956 | } | |
2957 | ||
285a6bda | 2958 | this.date_graph = new Dygraph(this.container, data, options); |
540d00f1 | 2959 | } |
285a6bda | 2960 | |
239c712d NAG |
2961 | /** |
2962 | * Google charts compatible setSelection | |
50360fd0 | 2963 | * Only row selection is supported, all points in the row will be highlighted |
239c712d NAG |
2964 | * @param {Array} array of the selected cells |
2965 | * @public | |
2966 | */ | |
2967 | Dygraph.GVizChart.prototype.setSelection = function(selection_array) { | |
2968 | var row = false; | |
2969 | if (selection_array.length) { | |
2970 | row = selection_array[0].row; | |
2971 | } | |
2972 | this.date_graph.setSelection(row); | |
2973 | } | |
2974 | ||
103b7292 NAG |
2975 | /** |
2976 | * Google charts compatible getSelection implementation | |
2977 | * @return {Array} array of the selected cells | |
2978 | * @public | |
2979 | */ | |
2980 | Dygraph.GVizChart.prototype.getSelection = function() { | |
2981 | var selection = []; | |
50360fd0 | 2982 | |
103b7292 | 2983 | var row = this.date_graph.getSelection(); |
50360fd0 | 2984 | |
103b7292 | 2985 | if (row < 0) return selection; |
50360fd0 | 2986 | |
103b7292 NAG |
2987 | col = 1; |
2988 | for (var i in this.date_graph.layout_.datasets) { | |
2989 | selection.push({row: row, column: col}); | |
2990 | col++; | |
2991 | } | |
2992 | ||
2993 | return selection; | |
2994 | } | |
2995 | ||
285a6bda DV |
2996 | // Older pages may still use this name. |
2997 | DateGraph = Dygraph; |