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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 | ||
129 | stepPlot: false | |
285a6bda DV |
130 | }; |
131 | ||
132 | // Various logging levels. | |
133 | Dygraph.DEBUG = 1; | |
134 | Dygraph.INFO = 2; | |
135 | Dygraph.WARNING = 3; | |
136 | Dygraph.ERROR = 3; | |
137 | ||
5c528fa2 DV |
138 | // Used for initializing annotation CSS rules only once. |
139 | Dygraph.addedAnnotationCSS = false; | |
140 | ||
285a6bda DV |
141 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { |
142 | // Labels is no longer a constructor parameter, since it's typically set | |
143 | // directly from the data source. It also conains a name for the x-axis, | |
144 | // which the previous constructor form did not. | |
145 | if (labels != null) { | |
146 | var new_labels = ["Date"]; | |
147 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); | |
fc80a396 | 148 | Dygraph.update(attrs, { 'labels': new_labels }); |
285a6bda DV |
149 | } |
150 | this.__init__(div, file, attrs); | |
8e4a6af3 DV |
151 | }; |
152 | ||
6a1aa64f | 153 | /** |
285a6bda | 154 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
6a1aa64f DV |
155 | * and interaction <canvas> inside of it. See the constructor for details |
156 | * on the parameters. | |
12e4c741 | 157 | * @param {Element} div the Element to render the graph into. |
6a1aa64f | 158 | * @param {String | Function} file Source data |
6a1aa64f DV |
159 | * @param {Object} attrs Miscellaneous other options |
160 | * @private | |
161 | */ | |
285a6bda DV |
162 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
163 | // Support two-argument constructor | |
164 | if (attrs == null) { attrs = {}; } | |
165 | ||
6a1aa64f | 166 | // Copy the important bits into the object |
32988383 | 167 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
6a1aa64f | 168 | this.maindiv_ = div; |
6a1aa64f | 169 | this.file_ = file; |
285a6bda | 170 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
6a1aa64f | 171 | this.previousVerticalX_ = -1; |
6a1aa64f | 172 | this.fractions_ = attrs.fractions || false; |
6a1aa64f DV |
173 | this.dateWindow_ = attrs.dateWindow || null; |
174 | this.valueRange_ = attrs.valueRange || null; | |
6a1aa64f | 175 | this.wilsonInterval_ = attrs.wilsonInterval || true; |
fe0b7c03 | 176 | this.is_initial_draw_ = true; |
5c528fa2 | 177 | this.annotations_ = []; |
8e4a6af3 | 178 | |
f7d6278e DV |
179 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
180 | // div, then only one will be drawn. | |
181 | div.innerHTML = ""; | |
182 | ||
c21d2c2d | 183 | // If the div isn't already sized then inherit from our attrs or |
184 | // give it a default size. | |
285a6bda | 185 | if (div.style.width == '') { |
c21d2c2d | 186 | div.style.width = attrs.width || Dygraph.DEFAULT_WIDTH + "px"; |
285a6bda DV |
187 | } |
188 | if (div.style.height == '') { | |
c21d2c2d | 189 | div.style.height = attrs.height || Dygraph.DEFAULT_HEIGHT + "px"; |
32988383 | 190 | } |
285a6bda DV |
191 | this.width_ = parseInt(div.style.width, 10); |
192 | this.height_ = parseInt(div.style.height, 10); | |
c21d2c2d | 193 | // The div might have been specified as percent of the current window size, |
194 | // convert that to an appropriate number of pixels. | |
195 | if (div.style.width.indexOf("%") == div.style.width.length - 1) { | |
c6f45033 | 196 | this.width_ = div.offsetWidth; |
c21d2c2d | 197 | } |
198 | if (div.style.height.indexOf("%") == div.style.height.length - 1) { | |
c6f45033 | 199 | this.height_ = div.offsetHeight; |
c21d2c2d | 200 | } |
32988383 | 201 | |
10a6456d DV |
202 | if (this.width_ == 0) { |
203 | this.error("dygraph has zero width. Please specify a width in pixels."); | |
204 | } | |
205 | if (this.height_ == 0) { | |
206 | this.error("dygraph has zero height. Please specify a height in pixels."); | |
207 | } | |
208 | ||
344ba8c0 | 209 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
43af96e7 NK |
210 | if (attrs['stackedGraph']) { |
211 | attrs['fillGraph'] = true; | |
212 | // TODO(nikhilk): Add any other stackedGraph checks here. | |
213 | } | |
214 | ||
285a6bda DV |
215 | // Dygraphs has many options, some of which interact with one another. |
216 | // To keep track of everything, we maintain two sets of options: | |
217 | // | |
c21d2c2d | 218 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
219 | // this.attrs_ defaults, options derived from user_attrs_, data. |
220 | // | |
221 | // Options are then accessed this.attr_('attr'), which first looks at | |
222 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
223 | // defaults without overriding behavior that the user specifically asks for. | |
224 | this.user_attrs_ = {}; | |
fc80a396 | 225 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 226 | |
285a6bda | 227 | this.attrs_ = {}; |
fc80a396 | 228 | Dygraph.update(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 229 | |
16269f6e | 230 | this.boundaryIds_ = []; |
6a1aa64f | 231 | |
285a6bda DV |
232 | // Make a note of whether labels will be pulled from the CSV file. |
233 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
6a1aa64f | 234 | |
5c528fa2 DV |
235 | Dygraph.addAnnotationRule(); |
236 | ||
6a1aa64f DV |
237 | // Create the containing DIV and other interactive elements |
238 | this.createInterface_(); | |
239 | ||
738fc797 | 240 | this.start_(); |
6a1aa64f DV |
241 | }; |
242 | ||
450fe64b DV |
243 | Dygraph.prototype.attr_ = function(name, series) { |
244 | if (series && | |
245 | typeof(this.user_attrs_[series]) != 'undefined' && | |
de0445fc | 246 | this.user_attrs_[series] != null && |
450fe64b DV |
247 | typeof(this.user_attrs_[series][name]) != 'undefined') { |
248 | return this.user_attrs_[series][name]; | |
249 | } else if (typeof(this.user_attrs_[name]) != 'undefined') { | |
285a6bda DV |
250 | return this.user_attrs_[name]; |
251 | } else if (typeof(this.attrs_[name]) != 'undefined') { | |
252 | return this.attrs_[name]; | |
253 | } else { | |
254 | return null; | |
255 | } | |
256 | }; | |
257 | ||
258 | // TODO(danvk): any way I can get the line numbers to be this.warn call? | |
259 | Dygraph.prototype.log = function(severity, message) { | |
260 | if (typeof(console) != 'undefined') { | |
261 | switch (severity) { | |
262 | case Dygraph.DEBUG: | |
263 | console.debug('dygraphs: ' + message); | |
264 | break; | |
265 | case Dygraph.INFO: | |
266 | console.info('dygraphs: ' + message); | |
267 | break; | |
268 | case Dygraph.WARNING: | |
269 | console.warn('dygraphs: ' + message); | |
270 | break; | |
271 | case Dygraph.ERROR: | |
272 | console.error('dygraphs: ' + message); | |
273 | break; | |
274 | } | |
275 | } | |
276 | } | |
277 | Dygraph.prototype.info = function(message) { | |
278 | this.log(Dygraph.INFO, message); | |
279 | } | |
280 | Dygraph.prototype.warn = function(message) { | |
281 | this.log(Dygraph.WARNING, message); | |
282 | } | |
283 | Dygraph.prototype.error = function(message) { | |
284 | this.log(Dygraph.ERROR, message); | |
285 | } | |
286 | ||
6a1aa64f DV |
287 | /** |
288 | * Returns the current rolling period, as set by the user or an option. | |
289 | * @return {Number} The number of days in the rolling window | |
290 | */ | |
285a6bda | 291 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 292 | return this.rollPeriod_; |
76171648 DV |
293 | }; |
294 | ||
599fb4ad DV |
295 | /** |
296 | * Returns the currently-visible x-range. This can be affected by zooming, | |
297 | * panning or a call to updateOptions. | |
298 | * Returns a two-element array: [left, right]. | |
299 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
300 | */ | |
301 | Dygraph.prototype.xAxisRange = function() { | |
302 | if (this.dateWindow_) return this.dateWindow_; | |
303 | ||
304 | // The entire chart is visible. | |
305 | var left = this.rawData_[0][0]; | |
306 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
307 | return [left, right]; | |
308 | }; | |
309 | ||
3230c662 DV |
310 | /** |
311 | * Returns the currently-visible y-range. This can be affected by zooming, | |
312 | * panning or a call to updateOptions. | |
313 | * Returns a two-element array: [bottom, top]. | |
314 | */ | |
315 | Dygraph.prototype.yAxisRange = function() { | |
316 | return this.displayedYRange_; | |
317 | }; | |
318 | ||
319 | /** | |
320 | * Convert from data coordinates to canvas/div X/Y coordinates. | |
321 | * Returns a two-element array: [X, Y] | |
322 | */ | |
323 | Dygraph.prototype.toDomCoords = function(x, y) { | |
324 | var ret = [null, null]; | |
325 | var area = this.plotter_.area; | |
326 | if (x !== null) { | |
327 | var xRange = this.xAxisRange(); | |
328 | ret[0] = area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; | |
329 | } | |
330 | ||
331 | if (y !== null) { | |
332 | var yRange = this.yAxisRange(); | |
891ad846 | 333 | ret[1] = area.y + (yRange[1] - y) / (yRange[1] - yRange[0]) * area.h; |
3230c662 DV |
334 | } |
335 | ||
336 | return ret; | |
337 | }; | |
338 | ||
56623f3b | 339 | // TODO(danvk): use these functions throughout dygraphs. |
3230c662 DV |
340 | /** |
341 | * Convert from canvas/div coords to data coordinates. | |
342 | * Returns a two-element array: [X, Y] | |
343 | */ | |
344 | Dygraph.prototype.toDataCoords = function(x, y) { | |
345 | var ret = [null, null]; | |
346 | var area = this.plotter_.area; | |
347 | if (x !== null) { | |
348 | var xRange = this.xAxisRange(); | |
349 | ret[0] = xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); | |
350 | } | |
351 | ||
352 | if (y !== null) { | |
353 | var yRange = this.yAxisRange(); | |
354 | ret[1] = yRange[0] + (area.h - y) / area.h * (yRange[1] - yRange[0]); | |
355 | } | |
356 | ||
357 | return ret; | |
358 | }; | |
359 | ||
e99fde05 DV |
360 | /** |
361 | * Returns the number of columns (including the independent variable). | |
362 | */ | |
363 | Dygraph.prototype.numColumns = function() { | |
364 | return this.rawData_[0].length; | |
365 | }; | |
366 | ||
367 | /** | |
368 | * Returns the number of rows (excluding any header/label row). | |
369 | */ | |
370 | Dygraph.prototype.numRows = function() { | |
371 | return this.rawData_.length; | |
372 | }; | |
373 | ||
374 | /** | |
375 | * Returns the value in the given row and column. If the row and column exceed | |
376 | * the bounds on the data, returns null. Also returns null if the value is | |
377 | * missing. | |
378 | */ | |
379 | Dygraph.prototype.getValue = function(row, col) { | |
380 | if (row < 0 || row > this.rawData_.length) return null; | |
381 | if (col < 0 || col > this.rawData_[row].length) return null; | |
382 | ||
383 | return this.rawData_[row][col]; | |
384 | }; | |
385 | ||
76171648 DV |
386 | Dygraph.addEvent = function(el, evt, fn) { |
387 | var normed_fn = function(e) { | |
388 | if (!e) var e = window.event; | |
389 | fn(e); | |
390 | }; | |
391 | if (window.addEventListener) { // Mozilla, Netscape, Firefox | |
392 | el.addEventListener(evt, normed_fn, false); | |
393 | } else { // IE | |
394 | el.attachEvent('on' + evt, normed_fn); | |
395 | } | |
396 | }; | |
6a1aa64f | 397 | |
4c47502d DV |
398 | Dygraph.clipCanvas_ = function(cnv, clip) { |
399 | var ctx = cnv.getContext("2d"); | |
400 | ctx.beginPath(); | |
401 | ctx.rect(clip.left, clip.top, clip.width, clip.height); | |
402 | ctx.clip(); | |
403 | }; | |
404 | ||
6a1aa64f | 405 | /** |
285a6bda | 406 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 407 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 408 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
409 | * @private |
410 | */ | |
285a6bda | 411 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
412 | // Create the all-enclosing graph div |
413 | var enclosing = this.maindiv_; | |
414 | ||
b0c3b730 DV |
415 | this.graphDiv = document.createElement("div"); |
416 | this.graphDiv.style.width = this.width_ + "px"; | |
417 | this.graphDiv.style.height = this.height_ + "px"; | |
418 | enclosing.appendChild(this.graphDiv); | |
419 | ||
4c47502d DV |
420 | var clip = { |
421 | top: 0, | |
422 | left: this.attr_("yAxisLabelWidth") + 2 * this.attr_("axisTickSize") | |
423 | }; | |
424 | clip.width = this.width_ - clip.left - this.attr_("rightGap"); | |
425 | clip.height = this.height_ - this.attr_("axisLabelFontSize") | |
426 | - 2 * this.attr_("axisTickSize"); | |
427 | this.clippingArea_ = clip; | |
428 | ||
b0c3b730 | 429 | // Create the canvas for interactive parts of the chart. |
f8cfec73 | 430 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 DV |
431 | this.canvas_.style.position = "absolute"; |
432 | this.canvas_.width = this.width_; | |
433 | this.canvas_.height = this.height_; | |
f8cfec73 DV |
434 | this.canvas_.style.width = this.width_ + "px"; // for IE |
435 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
b0c3b730 DV |
436 | |
437 | // ... and for static parts of the chart. | |
6a1aa64f | 438 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
76171648 | 439 | |
eb7bf005 EC |
440 | // The interactive parts of the graph are drawn on top of the chart. |
441 | this.graphDiv.appendChild(this.hidden_); | |
442 | this.graphDiv.appendChild(this.canvas_); | |
443 | this.mouseEventElement_ = this.canvas_; | |
444 | ||
4c47502d DV |
445 | // Make sure we don't overdraw. |
446 | Dygraph.clipCanvas_(this.hidden_, this.clippingArea_); | |
447 | Dygraph.clipCanvas_(this.canvas_, this.clippingArea_); | |
448 | ||
76171648 | 449 | var dygraph = this; |
eb7bf005 | 450 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(e) { |
76171648 DV |
451 | dygraph.mouseMove_(e); |
452 | }); | |
eb7bf005 | 453 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(e) { |
76171648 DV |
454 | dygraph.mouseOut_(e); |
455 | }); | |
697e70b2 DV |
456 | |
457 | // Create the grapher | |
458 | // TODO(danvk): why does the Layout need its own set of options? | |
459 | this.layoutOptions_ = { 'xOriginIsZero': false }; | |
460 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
461 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
462 | Dygraph.update(this.layoutOptions_, { | |
463 | 'errorBars': (this.attr_("errorBars") || this.attr_("customBars")) }); | |
464 | ||
465 | this.layout_ = new DygraphLayout(this, this.layoutOptions_); | |
466 | ||
467 | // TODO(danvk): why does the Renderer need its own set of options? | |
468 | this.renderOptions_ = { colorScheme: this.colors_, | |
469 | strokeColor: null, | |
470 | axisLineWidth: Dygraph.AXIS_LINE_WIDTH }; | |
471 | Dygraph.update(this.renderOptions_, this.attrs_); | |
472 | Dygraph.update(this.renderOptions_, this.user_attrs_); | |
473 | this.plotter_ = new DygraphCanvasRenderer(this, | |
474 | this.hidden_, this.layout_, | |
475 | this.renderOptions_); | |
476 | ||
477 | this.createStatusMessage_(); | |
478 | this.createRollInterface_(); | |
479 | this.createDragInterface_(); | |
4cfcc38c DV |
480 | }; |
481 | ||
482 | /** | |
483 | * Detach DOM elements in the dygraph and null out all data references. | |
484 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
485 | * usage. See, e.g., the tests/perf.html example. | |
486 | */ | |
487 | Dygraph.prototype.destroy = function() { | |
488 | var removeRecursive = function(node) { | |
489 | while (node.hasChildNodes()) { | |
490 | removeRecursive(node.firstChild); | |
491 | node.removeChild(node.firstChild); | |
492 | } | |
493 | }; | |
494 | removeRecursive(this.maindiv_); | |
495 | ||
496 | var nullOut = function(obj) { | |
497 | for (var n in obj) { | |
498 | if (typeof(obj[n]) === 'object') { | |
499 | obj[n] = null; | |
500 | } | |
501 | } | |
502 | }; | |
503 | ||
504 | // These may not all be necessary, but it can't hurt... | |
505 | nullOut(this.layout_); | |
506 | nullOut(this.plotter_); | |
507 | nullOut(this); | |
508 | }; | |
6a1aa64f DV |
509 | |
510 | /** | |
511 | * Creates the canvas containing the PlotKit graph. Only plotkit ever draws on | |
285a6bda | 512 | * this particular canvas. All Dygraph work is done on this.canvas_. |
8846615a | 513 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
514 | * @return {Object} The newly-created canvas |
515 | * @private | |
516 | */ | |
285a6bda | 517 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 | 518 | var h = Dygraph.createCanvas(); |
6a1aa64f | 519 | h.style.position = "absolute"; |
9ac5e4ae DV |
520 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
521 | // some extra area to make it easier to zoom in on the far left and far | |
522 | // right. h needs to be precisely the plot area, so that clipping occurs. | |
6a1aa64f DV |
523 | h.style.top = canvas.style.top; |
524 | h.style.left = canvas.style.left; | |
525 | h.width = this.width_; | |
526 | h.height = this.height_; | |
f8cfec73 DV |
527 | h.style.width = this.width_ + "px"; // for IE |
528 | h.style.height = this.height_ + "px"; // for IE | |
6a1aa64f DV |
529 | return h; |
530 | }; | |
531 | ||
f474c2a3 DV |
532 | // Taken from MochiKit.Color |
533 | Dygraph.hsvToRGB = function (hue, saturation, value) { | |
534 | var red; | |
535 | var green; | |
536 | var blue; | |
537 | if (saturation === 0) { | |
538 | red = value; | |
539 | green = value; | |
540 | blue = value; | |
541 | } else { | |
542 | var i = Math.floor(hue * 6); | |
543 | var f = (hue * 6) - i; | |
544 | var p = value * (1 - saturation); | |
545 | var q = value * (1 - (saturation * f)); | |
546 | var t = value * (1 - (saturation * (1 - f))); | |
547 | switch (i) { | |
548 | case 1: red = q; green = value; blue = p; break; | |
549 | case 2: red = p; green = value; blue = t; break; | |
550 | case 3: red = p; green = q; blue = value; break; | |
551 | case 4: red = t; green = p; blue = value; break; | |
552 | case 5: red = value; green = p; blue = q; break; | |
553 | case 6: // fall through | |
554 | case 0: red = value; green = t; blue = p; break; | |
555 | } | |
556 | } | |
557 | red = Math.floor(255 * red + 0.5); | |
558 | green = Math.floor(255 * green + 0.5); | |
559 | blue = Math.floor(255 * blue + 0.5); | |
560 | return 'rgb(' + red + ',' + green + ',' + blue + ')'; | |
561 | }; | |
562 | ||
563 | ||
6a1aa64f DV |
564 | /** |
565 | * Generate a set of distinct colors for the data series. This is done with a | |
566 | * color wheel. Saturation/Value are customizable, and the hue is | |
567 | * equally-spaced around the color wheel. If a custom set of colors is | |
568 | * specified, that is used instead. | |
6a1aa64f DV |
569 | * @private |
570 | */ | |
285a6bda DV |
571 | Dygraph.prototype.setColors_ = function() { |
572 | // TODO(danvk): compute this directly into this.attrs_['colorScheme'] and do | |
573 | // away with this.renderOptions_. | |
574 | var num = this.attr_("labels").length - 1; | |
6a1aa64f | 575 | this.colors_ = []; |
285a6bda DV |
576 | var colors = this.attr_('colors'); |
577 | if (!colors) { | |
578 | var sat = this.attr_('colorSaturation') || 1.0; | |
579 | var val = this.attr_('colorValue') || 0.5; | |
2aa21213 | 580 | var half = Math.ceil(num / 2); |
6a1aa64f | 581 | for (var i = 1; i <= num; i++) { |
ec1959eb | 582 | if (!this.visibility()[i-1]) continue; |
43af96e7 | 583 | // alternate colors for high contrast. |
2aa21213 | 584 | var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2); |
43af96e7 NK |
585 | var hue = (1.0 * idx/ (1 + num)); |
586 | this.colors_.push(Dygraph.hsvToRGB(hue, sat, val)); | |
6a1aa64f DV |
587 | } |
588 | } else { | |
589 | for (var i = 0; i < num; i++) { | |
ec1959eb | 590 | if (!this.visibility()[i]) continue; |
285a6bda | 591 | var colorStr = colors[i % colors.length]; |
f474c2a3 | 592 | this.colors_.push(colorStr); |
6a1aa64f DV |
593 | } |
594 | } | |
285a6bda | 595 | |
c21d2c2d | 596 | // TODO(danvk): update this w/r/t/ the new options system. |
285a6bda | 597 | this.renderOptions_.colorScheme = this.colors_; |
fc80a396 DV |
598 | Dygraph.update(this.plotter_.options, this.renderOptions_); |
599 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
600 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
6a1aa64f DV |
601 | } |
602 | ||
43af96e7 NK |
603 | /** |
604 | * Return the list of colors. This is either the list of colors passed in the | |
605 | * attributes, or the autogenerated list of rgb(r,g,b) strings. | |
606 | * @return {Array<string>} The list of colors. | |
607 | */ | |
608 | Dygraph.prototype.getColors = function() { | |
609 | return this.colors_; | |
610 | }; | |
611 | ||
5e60386d DV |
612 | // The following functions are from quirksmode.org with a modification for Safari from |
613 | // http://blog.firetree.net/2005/07/04/javascript-find-position/ | |
3df0ccf0 DV |
614 | // http://www.quirksmode.org/js/findpos.html |
615 | Dygraph.findPosX = function(obj) { | |
616 | var curleft = 0; | |
5e60386d | 617 | if(obj.offsetParent) |
50360fd0 | 618 | while(1) |
5e60386d | 619 | { |
3df0ccf0 | 620 | curleft += obj.offsetLeft; |
5e60386d DV |
621 | if(!obj.offsetParent) |
622 | break; | |
3df0ccf0 DV |
623 | obj = obj.offsetParent; |
624 | } | |
5e60386d | 625 | else if(obj.x) |
3df0ccf0 DV |
626 | curleft += obj.x; |
627 | return curleft; | |
628 | }; | |
c21d2c2d | 629 | |
3df0ccf0 DV |
630 | Dygraph.findPosY = function(obj) { |
631 | var curtop = 0; | |
5e60386d DV |
632 | if(obj.offsetParent) |
633 | while(1) | |
634 | { | |
3df0ccf0 | 635 | curtop += obj.offsetTop; |
5e60386d DV |
636 | if(!obj.offsetParent) |
637 | break; | |
3df0ccf0 DV |
638 | obj = obj.offsetParent; |
639 | } | |
5e60386d | 640 | else if(obj.y) |
3df0ccf0 DV |
641 | curtop += obj.y; |
642 | return curtop; | |
643 | }; | |
644 | ||
5e60386d | 645 | |
71a11a8e | 646 | |
6a1aa64f DV |
647 | /** |
648 | * Create the div that contains information on the selected point(s) | |
649 | * This goes in the top right of the canvas, unless an external div has already | |
650 | * been specified. | |
651 | * @private | |
652 | */ | |
fedbd797 | 653 | Dygraph.prototype.createStatusMessage_ = function() { |
654 | var userLabelsDiv = this.user_attrs_["labelsDiv"]; | |
655 | if (userLabelsDiv && null != userLabelsDiv | |
656 | && (typeof(userLabelsDiv) == "string" || userLabelsDiv instanceof String)) { | |
657 | this.user_attrs_["labelsDiv"] = document.getElementById(userLabelsDiv); | |
658 | } | |
285a6bda DV |
659 | if (!this.attr_("labelsDiv")) { |
660 | var divWidth = this.attr_('labelsDivWidth'); | |
b0c3b730 | 661 | var messagestyle = { |
6a1aa64f DV |
662 | "position": "absolute", |
663 | "fontSize": "14px", | |
664 | "zIndex": 10, | |
665 | "width": divWidth + "px", | |
666 | "top": "0px", | |
8846615a | 667 | "left": (this.width_ - divWidth - 2) + "px", |
6a1aa64f DV |
668 | "background": "white", |
669 | "textAlign": "left", | |
b0c3b730 | 670 | "overflow": "hidden"}; |
fc80a396 | 671 | Dygraph.update(messagestyle, this.attr_('labelsDivStyles')); |
b0c3b730 DV |
672 | var div = document.createElement("div"); |
673 | for (var name in messagestyle) { | |
85b99f0b DV |
674 | if (messagestyle.hasOwnProperty(name)) { |
675 | div.style[name] = messagestyle[name]; | |
676 | } | |
b0c3b730 DV |
677 | } |
678 | this.graphDiv.appendChild(div); | |
285a6bda | 679 | this.attrs_.labelsDiv = div; |
6a1aa64f DV |
680 | } |
681 | }; | |
682 | ||
683 | /** | |
684 | * Create the text box to adjust the averaging period | |
685 | * @return {Object} The newly-created text box | |
686 | * @private | |
687 | */ | |
285a6bda | 688 | Dygraph.prototype.createRollInterface_ = function() { |
285a6bda | 689 | var display = this.attr_('showRoller') ? "block" : "none"; |
b0c3b730 DV |
690 | var textAttr = { "position": "absolute", |
691 | "zIndex": 10, | |
692 | "top": (this.plotter_.area.h - 25) + "px", | |
693 | "left": (this.plotter_.area.x + 1) + "px", | |
694 | "display": display | |
6a1aa64f | 695 | }; |
b0c3b730 DV |
696 | var roller = document.createElement("input"); |
697 | roller.type = "text"; | |
698 | roller.size = "2"; | |
699 | roller.value = this.rollPeriod_; | |
700 | for (var name in textAttr) { | |
85b99f0b DV |
701 | if (textAttr.hasOwnProperty(name)) { |
702 | roller.style[name] = textAttr[name]; | |
703 | } | |
b0c3b730 DV |
704 | } |
705 | ||
6a1aa64f | 706 | var pa = this.graphDiv; |
b0c3b730 | 707 | pa.appendChild(roller); |
76171648 DV |
708 | var dygraph = this; |
709 | roller.onchange = function() { dygraph.adjustRoll(roller.value); }; | |
6a1aa64f | 710 | return roller; |
76171648 DV |
711 | }; |
712 | ||
713 | // These functions are taken from MochiKit.Signal | |
714 | Dygraph.pageX = function(e) { | |
715 | if (e.pageX) { | |
716 | return (!e.pageX || e.pageX < 0) ? 0 : e.pageX; | |
717 | } else { | |
718 | var de = document; | |
719 | var b = document.body; | |
720 | return e.clientX + | |
721 | (de.scrollLeft || b.scrollLeft) - | |
722 | (de.clientLeft || 0); | |
723 | } | |
724 | }; | |
725 | ||
726 | Dygraph.pageY = function(e) { | |
727 | if (e.pageY) { | |
728 | return (!e.pageY || e.pageY < 0) ? 0 : e.pageY; | |
729 | } else { | |
730 | var de = document; | |
731 | var b = document.body; | |
732 | return e.clientY + | |
733 | (de.scrollTop || b.scrollTop) - | |
734 | (de.clientTop || 0); | |
735 | } | |
736 | }; | |
6a1aa64f DV |
737 | |
738 | /** | |
739 | * Set up all the mouse handlers needed to capture dragging behavior for zoom | |
27385109 | 740 | * events. |
6a1aa64f DV |
741 | * @private |
742 | */ | |
285a6bda | 743 | Dygraph.prototype.createDragInterface_ = function() { |
6a1aa64f DV |
744 | var self = this; |
745 | ||
746 | // Tracks whether the mouse is down right now | |
bce01b0f | 747 | var isZooming = false; |
c776c216 | 748 | var isPanning = false; |
6a1aa64f DV |
749 | var dragStartX = null; |
750 | var dragStartY = null; | |
751 | var dragEndX = null; | |
752 | var dragEndY = null; | |
753 | var prevEndX = null; | |
bce01b0f DV |
754 | var draggingDate = null; |
755 | var dateRange = null; | |
6a1aa64f DV |
756 | |
757 | // Utility function to convert page-wide coordinates to canvas coords | |
67e650dc DV |
758 | var px = 0; |
759 | var py = 0; | |
76171648 | 760 | var getX = function(e) { return Dygraph.pageX(e) - px }; |
1e1bf7df | 761 | var getY = function(e) { return Dygraph.pageY(e) - py }; |
6a1aa64f DV |
762 | |
763 | // Draw zoom rectangles when the mouse is down and the user moves around | |
eb7bf005 | 764 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(event) { |
bce01b0f | 765 | if (isZooming) { |
6a1aa64f DV |
766 | dragEndX = getX(event); |
767 | dragEndY = getY(event); | |
768 | ||
769 | self.drawZoomRect_(dragStartX, dragEndX, prevEndX); | |
770 | prevEndX = dragEndX; | |
bce01b0f DV |
771 | } else if (isPanning) { |
772 | dragEndX = getX(event); | |
773 | dragEndY = getY(event); | |
774 | ||
775 | // Want to have it so that: | |
776 | // 1. draggingDate appears at dragEndX | |
777 | // 2. daterange = (dateWindow_[1] - dateWindow_[0]) is unaltered. | |
778 | ||
779 | self.dateWindow_[0] = draggingDate - (dragEndX / self.width_) * dateRange; | |
780 | self.dateWindow_[1] = self.dateWindow_[0] + dateRange; | |
781 | self.drawGraph_(self.rawData_); | |
6a1aa64f DV |
782 | } |
783 | }); | |
784 | ||
785 | // Track the beginning of drag events | |
eb7bf005 | 786 | Dygraph.addEvent(this.mouseEventElement_, 'mousedown', function(event) { |
3df0ccf0 DV |
787 | px = Dygraph.findPosX(self.canvas_); |
788 | py = Dygraph.findPosY(self.canvas_); | |
6a1aa64f DV |
789 | dragStartX = getX(event); |
790 | dragStartY = getY(event); | |
bce01b0f | 791 | |
2dab69c3 | 792 | if (event.altKey || event.shiftKey) { |
d12999d3 | 793 | if (!self.dateWindow_) return; // have to be zoomed in to pan. |
bce01b0f DV |
794 | isPanning = true; |
795 | dateRange = self.dateWindow_[1] - self.dateWindow_[0]; | |
d12999d3 DV |
796 | draggingDate = (dragStartX / self.width_) * dateRange + |
797 | self.dateWindow_[0]; | |
bce01b0f DV |
798 | } else { |
799 | isZooming = true; | |
800 | } | |
6a1aa64f DV |
801 | }); |
802 | ||
803 | // If the user releases the mouse button during a drag, but not over the | |
804 | // canvas, then it doesn't count as a zooming action. | |
76171648 | 805 | Dygraph.addEvent(document, 'mouseup', function(event) { |
bce01b0f DV |
806 | if (isZooming || isPanning) { |
807 | isZooming = false; | |
6a1aa64f DV |
808 | dragStartX = null; |
809 | dragStartY = null; | |
810 | } | |
bce01b0f DV |
811 | |
812 | if (isPanning) { | |
813 | isPanning = false; | |
814 | draggingDate = null; | |
815 | dateRange = null; | |
816 | } | |
6a1aa64f DV |
817 | }); |
818 | ||
819 | // Temporarily cancel the dragging event when the mouse leaves the graph | |
eb7bf005 | 820 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(event) { |
bce01b0f | 821 | if (isZooming) { |
6a1aa64f DV |
822 | dragEndX = null; |
823 | dragEndY = null; | |
824 | } | |
825 | }); | |
826 | ||
827 | // If the mouse is released on the canvas during a drag event, then it's a | |
828 | // zoom. Only do the zoom if it's over a large enough area (>= 10 pixels) | |
eb7bf005 | 829 | Dygraph.addEvent(this.mouseEventElement_, 'mouseup', function(event) { |
bce01b0f DV |
830 | if (isZooming) { |
831 | isZooming = false; | |
6a1aa64f DV |
832 | dragEndX = getX(event); |
833 | dragEndY = getY(event); | |
834 | var regionWidth = Math.abs(dragEndX - dragStartX); | |
835 | var regionHeight = Math.abs(dragEndY - dragStartY); | |
836 | ||
e2b5f2bc DV |
837 | if (regionWidth < 2 && regionHeight < 2 && |
838 | self.lastx_ != undefined && self.lastx_ != -1) { | |
2ad87eaa | 839 | // TODO(danvk): pass along more info about the points, e.g. 'x' |
1e1bf7df | 840 | if (self.attr_('clickCallback') != null) { |
1e1bf7df DV |
841 | self.attr_('clickCallback')(event, self.lastx_, self.selPoints_); |
842 | } | |
843 | if (self.attr_('pointClickCallback')) { | |
844 | // check if the click was on a particular point. | |
845 | var closestIdx = -1; | |
846 | var closestDistance = 0; | |
847 | for (var i = 0; i < self.selPoints_.length; i++) { | |
848 | var p = self.selPoints_[i]; | |
849 | var distance = Math.pow(p.canvasx - dragEndX, 2) + | |
850 | Math.pow(p.canvasy - dragEndY, 2); | |
851 | if (closestIdx == -1 || distance < closestDistance) { | |
852 | closestDistance = distance; | |
853 | closestIdx = i; | |
854 | } | |
855 | } | |
856 | ||
857 | // Allow any click within two pixels of the dot. | |
2ad87eaa | 858 | var radius = self.attr_('highlightCircleSize') + 2; |
1e1bf7df DV |
859 | if (closestDistance <= 5 * 5) { |
860 | self.attr_('pointClickCallback')(event, self.selPoints_[closestIdx]); | |
861 | } | |
862 | } | |
6a1aa64f DV |
863 | } |
864 | ||
865 | if (regionWidth >= 10) { | |
866 | self.doZoom_(Math.min(dragStartX, dragEndX), | |
867 | Math.max(dragStartX, dragEndX)); | |
868 | } else { | |
869 | self.canvas_.getContext("2d").clearRect(0, 0, | |
870 | self.canvas_.width, | |
871 | self.canvas_.height); | |
872 | } | |
873 | ||
874 | dragStartX = null; | |
875 | dragStartY = null; | |
876 | } | |
bce01b0f DV |
877 | |
878 | if (isPanning) { | |
879 | isPanning = false; | |
880 | draggingDate = null; | |
881 | dateRange = null; | |
882 | } | |
6a1aa64f DV |
883 | }); |
884 | ||
885 | // Double-clicking zooms back out | |
eb7bf005 | 886 | Dygraph.addEvent(this.mouseEventElement_, 'dblclick', function(event) { |
b258a3da | 887 | if (self.dateWindow_ == null) return; |
6a1aa64f DV |
888 | self.dateWindow_ = null; |
889 | self.drawGraph_(self.rawData_); | |
890 | var minDate = self.rawData_[0][0]; | |
891 | var maxDate = self.rawData_[self.rawData_.length - 1][0]; | |
285a6bda DV |
892 | if (self.attr_("zoomCallback")) { |
893 | self.attr_("zoomCallback")(minDate, maxDate); | |
67e650dc | 894 | } |
6a1aa64f DV |
895 | }); |
896 | }; | |
897 | ||
898 | /** | |
899 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
900 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
901 | * avoid extra redrawing, but it's tricky to avoid interactions with the status | |
902 | * dots. | |
903 | * @param {Number} startX The X position where the drag started, in canvas | |
904 | * coordinates. | |
905 | * @param {Number} endX The current X position of the drag, in canvas coords. | |
906 | * @param {Number} prevEndX The value of endX on the previous call to this | |
907 | * function. Used to avoid excess redrawing | |
908 | * @private | |
909 | */ | |
285a6bda | 910 | Dygraph.prototype.drawZoomRect_ = function(startX, endX, prevEndX) { |
6a1aa64f DV |
911 | var ctx = this.canvas_.getContext("2d"); |
912 | ||
913 | // Clean up from the previous rect if necessary | |
914 | if (prevEndX) { | |
915 | ctx.clearRect(Math.min(startX, prevEndX), 0, | |
916 | Math.abs(startX - prevEndX), this.height_); | |
917 | } | |
918 | ||
919 | // Draw a light-grey rectangle to show the new viewing area | |
920 | if (endX && startX) { | |
921 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
922 | ctx.fillRect(Math.min(startX, endX), 0, | |
923 | Math.abs(endX - startX), this.height_); | |
924 | } | |
925 | }; | |
926 | ||
927 | /** | |
928 | * Zoom to something containing [lowX, highX]. These are pixel coordinates | |
929 | * in the canvas. The exact zoom window may be slightly larger if there are no | |
930 | * data points near lowX or highX. This function redraws the graph. | |
931 | * @param {Number} lowX The leftmost pixel value that should be visible. | |
932 | * @param {Number} highX The rightmost pixel value that should be visible. | |
933 | * @private | |
934 | */ | |
285a6bda | 935 | Dygraph.prototype.doZoom_ = function(lowX, highX) { |
6a1aa64f | 936 | // Find the earliest and latest dates contained in this canvasx range. |
56623f3b DV |
937 | var r = this.toDataCoords(lowX, null); |
938 | var minDate = r[0]; | |
939 | r = this.toDataCoords(highX, null); | |
940 | var maxDate = r[0]; | |
6a1aa64f DV |
941 | |
942 | this.dateWindow_ = [minDate, maxDate]; | |
943 | this.drawGraph_(this.rawData_); | |
285a6bda DV |
944 | if (this.attr_("zoomCallback")) { |
945 | this.attr_("zoomCallback")(minDate, maxDate); | |
67e650dc | 946 | } |
6a1aa64f DV |
947 | }; |
948 | ||
949 | /** | |
950 | * When the mouse moves in the canvas, display information about a nearby data | |
951 | * point and draw dots over those points in the data series. This function | |
952 | * takes care of cleanup of previously-drawn dots. | |
953 | * @param {Object} event The mousemove event from the browser. | |
954 | * @private | |
955 | */ | |
285a6bda | 956 | Dygraph.prototype.mouseMove_ = function(event) { |
eb7bf005 | 957 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_); |
6a1aa64f DV |
958 | var points = this.layout_.points; |
959 | ||
960 | var lastx = -1; | |
961 | var lasty = -1; | |
962 | ||
963 | // Loop through all the points and find the date nearest to our current | |
964 | // location. | |
965 | var minDist = 1e+100; | |
966 | var idx = -1; | |
967 | for (var i = 0; i < points.length; i++) { | |
968 | var dist = Math.abs(points[i].canvasx - canvasx); | |
f032c51d | 969 | if (dist > minDist) continue; |
6a1aa64f DV |
970 | minDist = dist; |
971 | idx = i; | |
972 | } | |
973 | if (idx >= 0) lastx = points[idx].xval; | |
974 | // Check that you can really highlight the last day's data | |
975 | if (canvasx > points[points.length-1].canvasx) | |
976 | lastx = points[points.length-1].xval; | |
977 | ||
978 | // Extract the points we've selected | |
b258a3da | 979 | this.selPoints_ = []; |
50360fd0 | 980 | var l = points.length; |
416b05ad NK |
981 | if (!this.attr_("stackedGraph")) { |
982 | for (var i = 0; i < l; i++) { | |
983 | if (points[i].xval == lastx) { | |
984 | this.selPoints_.push(points[i]); | |
985 | } | |
986 | } | |
987 | } else { | |
354e15ab DE |
988 | // Need to 'unstack' points starting from the bottom |
989 | var cumulative_sum = 0; | |
416b05ad NK |
990 | for (var i = l - 1; i >= 0; i--) { |
991 | if (points[i].xval == lastx) { | |
354e15ab | 992 | var p = {}; // Clone the point since we modify it |
d4139cd8 NK |
993 | for (var k in points[i]) { |
994 | p[k] = points[i][k]; | |
50360fd0 NK |
995 | } |
996 | p.yval -= cumulative_sum; | |
997 | cumulative_sum += p.yval; | |
d4139cd8 | 998 | this.selPoints_.push(p); |
12e4c741 | 999 | } |
6a1aa64f | 1000 | } |
354e15ab | 1001 | this.selPoints_.reverse(); |
6a1aa64f DV |
1002 | } |
1003 | ||
b258a3da | 1004 | if (this.attr_("highlightCallback")) { |
a4c6a67c | 1005 | var px = this.lastx_; |
dd082dda | 1006 | if (px !== null && lastx != px) { |
344ba8c0 | 1007 | // only fire if the selected point has changed. |
50360fd0 | 1008 | this.attr_("highlightCallback")(event, lastx, this.selPoints_); |
43af96e7 | 1009 | } |
12e4c741 | 1010 | } |
43af96e7 | 1011 | |
239c712d NAG |
1012 | // Save last x position for callbacks. |
1013 | this.lastx_ = lastx; | |
50360fd0 | 1014 | |
239c712d NAG |
1015 | this.updateSelection_(); |
1016 | }; | |
b258a3da | 1017 | |
239c712d NAG |
1018 | /** |
1019 | * Draw dots over the selectied points in the data series. This function | |
1020 | * takes care of cleanup of previously-drawn dots. | |
1021 | * @private | |
1022 | */ | |
1023 | Dygraph.prototype.updateSelection_ = function() { | |
6a1aa64f | 1024 | // Clear the previously drawn vertical, if there is one |
6a1aa64f DV |
1025 | var ctx = this.canvas_.getContext("2d"); |
1026 | if (this.previousVerticalX_ >= 0) { | |
46dde5f9 DV |
1027 | // Determine the maximum highlight circle size. |
1028 | var maxCircleSize = 0; | |
1029 | var num_series = this.attr_('labels').length; | |
1030 | for (var i = 1; i < num_series; i++) { | |
1031 | var r = this.attr_('highlightCircleSize', i); | |
1032 | if (r > maxCircleSize) maxCircleSize = r; | |
1033 | } | |
6a1aa64f | 1034 | var px = this.previousVerticalX_; |
46dde5f9 DV |
1035 | ctx.clearRect(px - maxCircleSize - 1, 0, |
1036 | 2 * maxCircleSize + 2, this.height_); | |
6a1aa64f DV |
1037 | } |
1038 | ||
584ceeaa DV |
1039 | var isOK = function(x) { return x && !isNaN(x); }; |
1040 | ||
d160cc3b | 1041 | if (this.selPoints_.length > 0) { |
b258a3da | 1042 | var canvasx = this.selPoints_[0].canvasx; |
6a1aa64f DV |
1043 | |
1044 | // Set the status message to indicate the selected point(s) | |
239c712d | 1045 | var replace = this.attr_('xValueFormatter')(this.lastx_, this) + ":"; |
50360fd0 | 1046 | var fmtFunc = this.attr_('yValueFormatter'); |
6a1aa64f | 1047 | var clen = this.colors_.length; |
d160cc3b NK |
1048 | |
1049 | if (this.attr_('showLabelsOnHighlight')) { | |
1050 | // Set the status message to indicate the selected point(s) | |
d160cc3b | 1051 | for (var i = 0; i < this.selPoints_.length; i++) { |
129569a5 | 1052 | if (!this.attr_("labelsShowZeroValues") && this.selPoints_[i].yval == 0) continue; |
d160cc3b NK |
1053 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
1054 | if (this.attr_("labelsSeparateLines")) { | |
1055 | replace += "<br/>"; | |
1056 | } | |
1057 | var point = this.selPoints_[i]; | |
1058 | var c = new RGBColor(this.colors_[i%clen]); | |
029da4b6 | 1059 | var yval = fmtFunc(point.yval); |
d160cc3b NK |
1060 | replace += " <b><font color='" + c.toHex() + "'>" |
1061 | + point.name + "</font></b>:" | |
1062 | + yval; | |
6a1aa64f | 1063 | } |
50360fd0 | 1064 | |
d160cc3b | 1065 | this.attr_("labelsDiv").innerHTML = replace; |
6a1aa64f | 1066 | } |
6a1aa64f | 1067 | |
6a1aa64f | 1068 | // Draw colored circles over the center of each selected point |
43af96e7 | 1069 | ctx.save(); |
b258a3da | 1070 | for (var i = 0; i < this.selPoints_.length; i++) { |
f032c51d | 1071 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
46dde5f9 DV |
1072 | var setIdx = this.indexFromSetName(this.selPoints_[i].name); |
1073 | var circleSize = this.attr_('highlightCircleSize', setIdx); | |
6a1aa64f | 1074 | ctx.beginPath(); |
563c70ca | 1075 | ctx.fillStyle = this.plotter_.colors[this.selPoints_[i].name]; |
f032c51d | 1076 | ctx.arc(canvasx, this.selPoints_[i].canvasy, circleSize, |
7bf6a9fe | 1077 | 0, 2 * Math.PI, false); |
6a1aa64f DV |
1078 | ctx.fill(); |
1079 | } | |
1080 | ctx.restore(); | |
1081 | ||
1082 | this.previousVerticalX_ = canvasx; | |
1083 | } | |
1084 | }; | |
1085 | ||
1086 | /** | |
239c712d NAG |
1087 | * Set manually set selected dots, and display information about them |
1088 | * @param int row number that should by highlighted | |
1089 | * false value clears the selection | |
1090 | * @public | |
1091 | */ | |
1092 | Dygraph.prototype.setSelection = function(row) { | |
1093 | // Extract the points we've selected | |
1094 | this.selPoints_ = []; | |
1095 | var pos = 0; | |
50360fd0 | 1096 | |
239c712d | 1097 | if (row !== false) { |
16269f6e NAG |
1098 | row = row-this.boundaryIds_[0][0]; |
1099 | } | |
50360fd0 | 1100 | |
16269f6e | 1101 | if (row !== false && row >= 0) { |
239c712d | 1102 | for (var i in this.layout_.datasets) { |
16269f6e NAG |
1103 | if (row < this.layout_.datasets[i].length) { |
1104 | this.selPoints_.push(this.layout_.points[pos+row]); | |
1105 | } | |
239c712d NAG |
1106 | pos += this.layout_.datasets[i].length; |
1107 | } | |
16269f6e | 1108 | } |
50360fd0 | 1109 | |
16269f6e | 1110 | if (this.selPoints_.length) { |
239c712d NAG |
1111 | this.lastx_ = this.selPoints_[0].xval; |
1112 | this.updateSelection_(); | |
1113 | } else { | |
1114 | this.lastx_ = -1; | |
1115 | this.clearSelection(); | |
1116 | } | |
1117 | ||
1118 | }; | |
1119 | ||
1120 | /** | |
6a1aa64f DV |
1121 | * The mouse has left the canvas. Clear out whatever artifacts remain |
1122 | * @param {Object} event the mouseout event from the browser. | |
1123 | * @private | |
1124 | */ | |
285a6bda | 1125 | Dygraph.prototype.mouseOut_ = function(event) { |
a4c6a67c AV |
1126 | if (this.attr_("unhighlightCallback")) { |
1127 | this.attr_("unhighlightCallback")(event); | |
1128 | } | |
1129 | ||
43af96e7 | 1130 | if (this.attr_("hideOverlayOnMouseOut")) { |
239c712d | 1131 | this.clearSelection(); |
43af96e7 | 1132 | } |
6a1aa64f DV |
1133 | }; |
1134 | ||
239c712d NAG |
1135 | /** |
1136 | * Remove all selection from the canvas | |
1137 | * @public | |
1138 | */ | |
1139 | Dygraph.prototype.clearSelection = function() { | |
1140 | // Get rid of the overlay data | |
1141 | var ctx = this.canvas_.getContext("2d"); | |
1142 | ctx.clearRect(0, 0, this.width_, this.height_); | |
1143 | this.attr_("labelsDiv").innerHTML = ""; | |
1144 | this.selPoints_ = []; | |
1145 | this.lastx_ = -1; | |
1146 | } | |
1147 | ||
103b7292 NAG |
1148 | /** |
1149 | * Returns the number of the currently selected row | |
1150 | * @return int row number, of -1 if nothing is selected | |
1151 | * @public | |
1152 | */ | |
1153 | Dygraph.prototype.getSelection = function() { | |
1154 | if (!this.selPoints_ || this.selPoints_.length < 1) { | |
1155 | return -1; | |
1156 | } | |
50360fd0 | 1157 | |
103b7292 NAG |
1158 | for (var row=0; row<this.layout_.points.length; row++ ) { |
1159 | if (this.layout_.points[row].x == this.selPoints_[0].x) { | |
16269f6e | 1160 | return row + this.boundaryIds_[0][0]; |
103b7292 NAG |
1161 | } |
1162 | } | |
1163 | return -1; | |
1164 | } | |
1165 | ||
285a6bda | 1166 | Dygraph.zeropad = function(x) { |
32988383 DV |
1167 | if (x < 10) return "0" + x; else return "" + x; |
1168 | } | |
1169 | ||
6a1aa64f | 1170 | /** |
6b8e33dd DV |
1171 | * Return a string version of the hours, minutes and seconds portion of a date. |
1172 | * @param {Number} date The JavaScript date (ms since epoch) | |
1173 | * @return {String} A time of the form "HH:MM:SS" | |
1174 | * @private | |
1175 | */ | |
bf640e56 | 1176 | Dygraph.hmsString_ = function(date) { |
285a6bda | 1177 | var zeropad = Dygraph.zeropad; |
6b8e33dd DV |
1178 | var d = new Date(date); |
1179 | if (d.getSeconds()) { | |
1180 | return zeropad(d.getHours()) + ":" + | |
1181 | zeropad(d.getMinutes()) + ":" + | |
1182 | zeropad(d.getSeconds()); | |
6b8e33dd | 1183 | } else { |
054531ca | 1184 | return zeropad(d.getHours()) + ":" + zeropad(d.getMinutes()); |
6b8e33dd DV |
1185 | } |
1186 | } | |
1187 | ||
1188 | /** | |
bf640e56 AV |
1189 | * Convert a JS date to a string appropriate to display on an axis that |
1190 | * is displaying values at the stated granularity. | |
1191 | * @param {Date} date The date to format | |
1192 | * @param {Number} granularity One of the Dygraph granularity constants | |
1193 | * @return {String} The formatted date | |
1194 | * @private | |
1195 | */ | |
1196 | Dygraph.dateAxisFormatter = function(date, granularity) { | |
1197 | if (granularity >= Dygraph.MONTHLY) { | |
1198 | return date.strftime('%b %y'); | |
1199 | } else { | |
31eddad3 | 1200 | var frac = date.getHours() * 3600 + date.getMinutes() * 60 + date.getSeconds() + date.getMilliseconds(); |
bf640e56 AV |
1201 | if (frac == 0 || granularity >= Dygraph.DAILY) { |
1202 | return new Date(date.getTime() + 3600*1000).strftime('%d%b'); | |
1203 | } else { | |
1204 | return Dygraph.hmsString_(date.getTime()); | |
1205 | } | |
1206 | } | |
1207 | } | |
1208 | ||
1209 | /** | |
6a1aa64f DV |
1210 | * Convert a JS date (millis since epoch) to YYYY/MM/DD |
1211 | * @param {Number} date The JavaScript date (ms since epoch) | |
1212 | * @return {String} A date of the form "YYYY/MM/DD" | |
1213 | * @private | |
1214 | */ | |
285a6bda DV |
1215 | Dygraph.dateString_ = function(date, self) { |
1216 | var zeropad = Dygraph.zeropad; | |
6a1aa64f DV |
1217 | var d = new Date(date); |
1218 | ||
1219 | // Get the year: | |
1220 | var year = "" + d.getFullYear(); | |
1221 | // Get a 0 padded month string | |
6b8e33dd | 1222 | var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh |
6a1aa64f | 1223 | // Get a 0 padded day string |
6b8e33dd | 1224 | var day = zeropad(d.getDate()); |
6a1aa64f | 1225 | |
6b8e33dd DV |
1226 | var ret = ""; |
1227 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); | |
bf640e56 | 1228 | if (frac) ret = " " + Dygraph.hmsString_(date); |
6b8e33dd DV |
1229 | |
1230 | return year + "/" + month + "/" + day + ret; | |
6a1aa64f DV |
1231 | }; |
1232 | ||
1233 | /** | |
1234 | * Round a number to the specified number of digits past the decimal point. | |
1235 | * @param {Number} num The number to round | |
1236 | * @param {Number} places The number of decimals to which to round | |
1237 | * @return {Number} The rounded number | |
1238 | * @private | |
1239 | */ | |
029da4b6 | 1240 | Dygraph.round_ = function(num, places) { |
6a1aa64f DV |
1241 | var shift = Math.pow(10, places); |
1242 | return Math.round(num * shift)/shift; | |
1243 | }; | |
1244 | ||
1245 | /** | |
1246 | * Fires when there's data available to be graphed. | |
1247 | * @param {String} data Raw CSV data to be plotted | |
1248 | * @private | |
1249 | */ | |
285a6bda | 1250 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f DV |
1251 | this.rawData_ = this.parseCSV_(data); |
1252 | this.drawGraph_(this.rawData_); | |
1253 | }; | |
1254 | ||
285a6bda | 1255 | Dygraph.prototype.months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", |
8846615a | 1256 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]; |
285a6bda | 1257 | Dygraph.prototype.quarters = ["Jan", "Apr", "Jul", "Oct"]; |
6a1aa64f DV |
1258 | |
1259 | /** | |
1260 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
1261 | * @private | |
1262 | */ | |
285a6bda | 1263 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f DV |
1264 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
1265 | var startDate, endDate; | |
1266 | if (this.dateWindow_) { | |
1267 | startDate = this.dateWindow_[0]; | |
1268 | endDate = this.dateWindow_[1]; | |
1269 | } else { | |
1270 | startDate = this.rawData_[0][0]; | |
1271 | endDate = this.rawData_[this.rawData_.length - 1][0]; | |
1272 | } | |
1273 | ||
285a6bda | 1274 | var xTicks = this.attr_('xTicker')(startDate, endDate, this); |
6a1aa64f | 1275 | this.layout_.updateOptions({xTicks: xTicks}); |
32988383 DV |
1276 | }; |
1277 | ||
1278 | // Time granularity enumeration | |
285a6bda | 1279 | Dygraph.SECONDLY = 0; |
20a41c17 DV |
1280 | Dygraph.TWO_SECONDLY = 1; |
1281 | Dygraph.FIVE_SECONDLY = 2; | |
1282 | Dygraph.TEN_SECONDLY = 3; | |
1283 | Dygraph.THIRTY_SECONDLY = 4; | |
1284 | Dygraph.MINUTELY = 5; | |
1285 | Dygraph.TWO_MINUTELY = 6; | |
1286 | Dygraph.FIVE_MINUTELY = 7; | |
1287 | Dygraph.TEN_MINUTELY = 8; | |
1288 | Dygraph.THIRTY_MINUTELY = 9; | |
1289 | Dygraph.HOURLY = 10; | |
1290 | Dygraph.TWO_HOURLY = 11; | |
1291 | Dygraph.SIX_HOURLY = 12; | |
1292 | Dygraph.DAILY = 13; | |
1293 | Dygraph.WEEKLY = 14; | |
1294 | Dygraph.MONTHLY = 15; | |
1295 | Dygraph.QUARTERLY = 16; | |
1296 | Dygraph.BIANNUAL = 17; | |
1297 | Dygraph.ANNUAL = 18; | |
1298 | Dygraph.DECADAL = 19; | |
1299 | Dygraph.NUM_GRANULARITIES = 20; | |
285a6bda DV |
1300 | |
1301 | Dygraph.SHORT_SPACINGS = []; | |
1302 | Dygraph.SHORT_SPACINGS[Dygraph.SECONDLY] = 1000 * 1; | |
20a41c17 DV |
1303 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_SECONDLY] = 1000 * 2; |
1304 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_SECONDLY] = 1000 * 5; | |
285a6bda DV |
1305 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_SECONDLY] = 1000 * 10; |
1306 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_SECONDLY] = 1000 * 30; | |
1307 | Dygraph.SHORT_SPACINGS[Dygraph.MINUTELY] = 1000 * 60; | |
20a41c17 DV |
1308 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_MINUTELY] = 1000 * 60 * 2; |
1309 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_MINUTELY] = 1000 * 60 * 5; | |
285a6bda DV |
1310 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_MINUTELY] = 1000 * 60 * 10; |
1311 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_MINUTELY] = 1000 * 60 * 30; | |
1312 | Dygraph.SHORT_SPACINGS[Dygraph.HOURLY] = 1000 * 3600; | |
20a41c17 | 1313 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_HOURLY] = 1000 * 3600 * 2; |
805d5519 | 1314 | Dygraph.SHORT_SPACINGS[Dygraph.SIX_HOURLY] = 1000 * 3600 * 6; |
285a6bda DV |
1315 | Dygraph.SHORT_SPACINGS[Dygraph.DAILY] = 1000 * 86400; |
1316 | Dygraph.SHORT_SPACINGS[Dygraph.WEEKLY] = 1000 * 604800; | |
32988383 DV |
1317 | |
1318 | // NumXTicks() | |
1319 | // | |
1320 | // If we used this time granularity, how many ticks would there be? | |
1321 | // This is only an approximation, but it's generally good enough. | |
1322 | // | |
285a6bda DV |
1323 | Dygraph.prototype.NumXTicks = function(start_time, end_time, granularity) { |
1324 | if (granularity < Dygraph.MONTHLY) { | |
32988383 | 1325 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1326 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
32988383 DV |
1327 | return Math.floor(0.5 + 1.0 * (end_time - start_time) / spacing); |
1328 | } else { | |
1329 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1330 | var num_months = 12; | |
285a6bda DV |
1331 | if (granularity == Dygraph.QUARTERLY) num_months = 3; |
1332 | if (granularity == Dygraph.BIANNUAL) num_months = 2; | |
1333 | if (granularity == Dygraph.ANNUAL) num_months = 1; | |
1334 | if (granularity == Dygraph.DECADAL) { num_months = 1; year_mod = 10; } | |
32988383 DV |
1335 | |
1336 | var msInYear = 365.2524 * 24 * 3600 * 1000; | |
1337 | var num_years = 1.0 * (end_time - start_time) / msInYear; | |
1338 | return Math.floor(0.5 + 1.0 * num_years * num_months / year_mod); | |
1339 | } | |
1340 | }; | |
1341 | ||
1342 | // GetXAxis() | |
1343 | // | |
1344 | // Construct an x-axis of nicely-formatted times on meaningful boundaries | |
1345 | // (e.g. 'Jan 09' rather than 'Jan 22, 2009'). | |
1346 | // | |
1347 | // Returns an array containing {v: millis, label: label} dictionaries. | |
1348 | // | |
285a6bda | 1349 | Dygraph.prototype.GetXAxis = function(start_time, end_time, granularity) { |
bf640e56 | 1350 | var formatter = this.attr_("xAxisLabelFormatter"); |
32988383 | 1351 | var ticks = []; |
285a6bda | 1352 | if (granularity < Dygraph.MONTHLY) { |
32988383 | 1353 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1354 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
3d29302c | 1355 | var format = '%d%b'; // e.g. "1Jan" |
076c9622 DV |
1356 | |
1357 | // Find a time less than start_time which occurs on a "nice" time boundary | |
1358 | // for this granularity. | |
1359 | var g = spacing / 1000; | |
076c9622 DV |
1360 | var d = new Date(start_time); |
1361 | if (g <= 60) { // seconds | |
1362 | var x = d.getSeconds(); d.setSeconds(x - x % g); | |
1363 | } else { | |
1364 | d.setSeconds(0); | |
1365 | g /= 60; | |
1366 | if (g <= 60) { // minutes | |
1367 | var x = d.getMinutes(); d.setMinutes(x - x % g); | |
1368 | } else { | |
1369 | d.setMinutes(0); | |
1370 | g /= 60; | |
1371 | ||
1372 | if (g <= 24) { // days | |
1373 | var x = d.getHours(); d.setHours(x - x % g); | |
1374 | } else { | |
1375 | d.setHours(0); | |
1376 | g /= 24; | |
1377 | ||
1378 | if (g == 7) { // one week | |
20a41c17 | 1379 | d.setDate(d.getDate() - d.getDay()); |
076c9622 DV |
1380 | } |
1381 | } | |
1382 | } | |
328bb812 | 1383 | } |
076c9622 DV |
1384 | start_time = d.getTime(); |
1385 | ||
32988383 | 1386 | for (var t = start_time; t <= end_time; t += spacing) { |
bf640e56 | 1387 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1388 | } |
1389 | } else { | |
1390 | // Display a tick mark on the first of a set of months of each year. | |
1391 | // Years get a tick mark iff y % year_mod == 0. This is useful for | |
1392 | // displaying a tick mark once every 10 years, say, on long time scales. | |
1393 | var months; | |
1394 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1395 | ||
285a6bda | 1396 | if (granularity == Dygraph.MONTHLY) { |
32988383 | 1397 | months = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ]; |
285a6bda | 1398 | } else if (granularity == Dygraph.QUARTERLY) { |
32988383 | 1399 | months = [ 0, 3, 6, 9 ]; |
285a6bda | 1400 | } else if (granularity == Dygraph.BIANNUAL) { |
32988383 | 1401 | months = [ 0, 6 ]; |
285a6bda | 1402 | } else if (granularity == Dygraph.ANNUAL) { |
32988383 | 1403 | months = [ 0 ]; |
285a6bda | 1404 | } else if (granularity == Dygraph.DECADAL) { |
32988383 DV |
1405 | months = [ 0 ]; |
1406 | year_mod = 10; | |
1407 | } | |
1408 | ||
1409 | var start_year = new Date(start_time).getFullYear(); | |
1410 | var end_year = new Date(end_time).getFullYear(); | |
285a6bda | 1411 | var zeropad = Dygraph.zeropad; |
32988383 DV |
1412 | for (var i = start_year; i <= end_year; i++) { |
1413 | if (i % year_mod != 0) continue; | |
1414 | for (var j = 0; j < months.length; j++) { | |
1415 | var date_str = i + "/" + zeropad(1 + months[j]) + "/01"; | |
1416 | var t = Date.parse(date_str); | |
1417 | if (t < start_time || t > end_time) continue; | |
bf640e56 | 1418 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1419 | } |
1420 | } | |
1421 | } | |
1422 | ||
1423 | return ticks; | |
1424 | }; | |
1425 | ||
6a1aa64f DV |
1426 | |
1427 | /** | |
1428 | * Add ticks to the x-axis based on a date range. | |
1429 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1430 | * @param {Number} endDate End of the date window (millis since epoch) | |
1431 | * @return {Array.<Object>} Array of {label, value} tuples. | |
1432 | * @public | |
1433 | */ | |
285a6bda | 1434 | Dygraph.dateTicker = function(startDate, endDate, self) { |
32988383 | 1435 | var chosen = -1; |
285a6bda DV |
1436 | for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) { |
1437 | var num_ticks = self.NumXTicks(startDate, endDate, i); | |
1438 | if (self.width_ / num_ticks >= self.attr_('pixelsPerXLabel')) { | |
32988383 DV |
1439 | chosen = i; |
1440 | break; | |
2769de62 | 1441 | } |
6a1aa64f DV |
1442 | } |
1443 | ||
32988383 | 1444 | if (chosen >= 0) { |
285a6bda | 1445 | return self.GetXAxis(startDate, endDate, chosen); |
6a1aa64f | 1446 | } else { |
32988383 | 1447 | // TODO(danvk): signal error. |
6a1aa64f | 1448 | } |
6a1aa64f DV |
1449 | }; |
1450 | ||
1451 | /** | |
1452 | * Add ticks when the x axis has numbers on it (instead of dates) | |
1453 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1454 | * @param {Number} endDate End of the date window (millis since epoch) | |
1455 | * @return {Array.<Object>} Array of {label, value} tuples. | |
1456 | * @public | |
1457 | */ | |
285a6bda | 1458 | Dygraph.numericTicks = function(minV, maxV, self) { |
c6336f04 DV |
1459 | // Basic idea: |
1460 | // Try labels every 1, 2, 5, 10, 20, 50, 100, etc. | |
1461 | // Calculate the resulting tick spacing (i.e. this.height_ / nTicks). | |
285a6bda | 1462 | // The first spacing greater than pixelsPerYLabel is what we use. |
ff00d3e2 | 1463 | // TODO(danvk): version that works on a log scale. |
f09e46d4 DV |
1464 | if (self.attr_("labelsKMG2")) { |
1465 | var mults = [1, 2, 4, 8]; | |
1466 | } else { | |
1467 | var mults = [1, 2, 5]; | |
1468 | } | |
c6336f04 | 1469 | var scale, low_val, high_val, nTicks; |
285a6bda DV |
1470 | // TODO(danvk): make it possible to set this for x- and y-axes independently. |
1471 | var pixelsPerTick = self.attr_('pixelsPerYLabel'); | |
c6336f04 | 1472 | for (var i = -10; i < 50; i++) { |
f09e46d4 DV |
1473 | if (self.attr_("labelsKMG2")) { |
1474 | var base_scale = Math.pow(16, i); | |
1475 | } else { | |
1476 | var base_scale = Math.pow(10, i); | |
1477 | } | |
c6336f04 DV |
1478 | for (var j = 0; j < mults.length; j++) { |
1479 | scale = base_scale * mults[j]; | |
c6336f04 DV |
1480 | low_val = Math.floor(minV / scale) * scale; |
1481 | high_val = Math.ceil(maxV / scale) * scale; | |
48a0ac91 | 1482 | nTicks = Math.abs(high_val - low_val) / scale; |
285a6bda | 1483 | var spacing = self.height_ / nTicks; |
c6336f04 | 1484 | // wish I could break out of both loops at once... |
285a6bda | 1485 | if (spacing > pixelsPerTick) break; |
c6336f04 | 1486 | } |
285a6bda | 1487 | if (spacing > pixelsPerTick) break; |
6a1aa64f DV |
1488 | } |
1489 | ||
1490 | // Construct labels for the ticks | |
1491 | var ticks = []; | |
ed11be50 DV |
1492 | var k; |
1493 | var k_labels = []; | |
1494 | if (self.attr_("labelsKMB")) { | |
1495 | k = 1000; | |
1496 | k_labels = [ "K", "M", "B", "T" ]; | |
1497 | } | |
1498 | if (self.attr_("labelsKMG2")) { | |
1499 | if (k) self.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); | |
1500 | k = 1024; | |
1501 | k_labels = [ "k", "M", "G", "T" ]; | |
1502 | } | |
1503 | ||
e21e69e2 | 1504 | // Allow reverse y-axis if it's explicitly requested. |
be7cdb11 | 1505 | if (low_val > high_val) scale *= -1; |
48a0ac91 | 1506 | |
c6336f04 DV |
1507 | for (var i = 0; i < nTicks; i++) { |
1508 | var tickV = low_val + i * scale; | |
0af6e346 | 1509 | var absTickV = Math.abs(tickV); |
029da4b6 | 1510 | var label = Dygraph.round_(tickV, 2); |
ed11be50 DV |
1511 | if (k_labels.length) { |
1512 | // Round up to an appropriate unit. | |
1513 | var n = k*k*k*k; | |
1514 | for (var j = 3; j >= 0; j--, n /= k) { | |
1515 | if (absTickV >= n) { | |
029da4b6 | 1516 | label = Dygraph.round_(tickV / n, 1) + k_labels[j]; |
ed11be50 DV |
1517 | break; |
1518 | } | |
afefbcdb | 1519 | } |
6a1aa64f DV |
1520 | } |
1521 | ticks.push( {label: label, v: tickV} ); | |
1522 | } | |
1523 | return ticks; | |
1524 | }; | |
1525 | ||
1526 | /** | |
1527 | * Adds appropriate ticks on the y-axis | |
1528 | * @param {Number} minY The minimum Y value in the data set | |
1529 | * @param {Number} maxY The maximum Y value in the data set | |
1530 | * @private | |
1531 | */ | |
285a6bda | 1532 | Dygraph.prototype.addYTicks_ = function(minY, maxY) { |
6a1aa64f | 1533 | // Set the number of ticks so that the labels are human-friendly. |
285a6bda DV |
1534 | // TODO(danvk): make this an attribute as well. |
1535 | var ticks = Dygraph.numericTicks(minY, maxY, this); | |
6a1aa64f DV |
1536 | this.layout_.updateOptions( { yAxis: [minY, maxY], |
1537 | yTicks: ticks } ); | |
1538 | }; | |
1539 | ||
5011e7a1 DV |
1540 | // Computes the range of the data series (including confidence intervals). |
1541 | // series is either [ [x1, y1], [x2, y2], ... ] or | |
1542 | // [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... | |
1543 | // Returns [low, high] | |
1544 | Dygraph.prototype.extremeValues_ = function(series) { | |
1545 | var minY = null, maxY = null; | |
1546 | ||
9922b78b | 1547 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
5011e7a1 DV |
1548 | if (bars) { |
1549 | // With custom bars, maxY is the max of the high values. | |
1550 | for (var j = 0; j < series.length; j++) { | |
1551 | var y = series[j][1][0]; | |
1552 | if (!y) continue; | |
1553 | var low = y - series[j][1][1]; | |
1554 | var high = y + series[j][1][2]; | |
1555 | if (low > y) low = y; // this can happen with custom bars, | |
1556 | if (high < y) high = y; // e.g. in tests/custom-bars.html | |
1557 | if (maxY == null || high > maxY) { | |
1558 | maxY = high; | |
1559 | } | |
1560 | if (minY == null || low < minY) { | |
1561 | minY = low; | |
1562 | } | |
1563 | } | |
1564 | } else { | |
1565 | for (var j = 0; j < series.length; j++) { | |
1566 | var y = series[j][1]; | |
d12999d3 | 1567 | if (y === null || isNaN(y)) continue; |
5011e7a1 DV |
1568 | if (maxY == null || y > maxY) { |
1569 | maxY = y; | |
1570 | } | |
1571 | if (minY == null || y < minY) { | |
1572 | minY = y; | |
1573 | } | |
1574 | } | |
1575 | } | |
1576 | ||
1577 | return [minY, maxY]; | |
1578 | }; | |
1579 | ||
6a1aa64f DV |
1580 | /** |
1581 | * Update the graph with new data. Data is in the format | |
1582 | * [ [date1, val1, val2, ...], [date2, val1, val2, ...] if errorBars=false | |
1583 | * or, if errorBars=true, | |
1584 | * [ [date1, [val1,stddev1], [val2,stddev2], ...], [date2, ...], ...] | |
1585 | * @param {Array.<Object>} data The data (see above) | |
1586 | * @private | |
1587 | */ | |
285a6bda | 1588 | Dygraph.prototype.drawGraph_ = function(data) { |
fe0b7c03 DV |
1589 | // This is used to set the second parameter to drawCallback, below. |
1590 | var is_initial_draw = this.is_initial_draw_; | |
1591 | this.is_initial_draw_ = false; | |
1592 | ||
3bd9c228 | 1593 | var minY = null, maxY = null; |
6a1aa64f | 1594 | this.layout_.removeAllDatasets(); |
285a6bda | 1595 | this.setColors_(); |
9317362d | 1596 | this.attrs_['pointSize'] = 0.5 * this.attr_('highlightCircleSize'); |
285a6bda | 1597 | |
354e15ab DE |
1598 | // Loop over the fields (series). Go from the last to the first, |
1599 | // because if they're stacked that's how we accumulate the values. | |
43af96e7 | 1600 | |
354e15ab DE |
1601 | var cumulative_y = []; // For stacked series. |
1602 | var datasets = []; | |
1603 | ||
1604 | // Loop over all fields and create datasets | |
1605 | for (var i = data[0].length - 1; i >= 1; i--) { | |
1cf11047 DV |
1606 | if (!this.visibility()[i - 1]) continue; |
1607 | ||
450fe64b DV |
1608 | var connectSeparatedPoints = this.attr_('connectSeparatedPoints', i); |
1609 | ||
6a1aa64f DV |
1610 | var series = []; |
1611 | for (var j = 0; j < data.length; j++) { | |
4a634fc7 | 1612 | if (data[j][i] != null || !connectSeparatedPoints) { |
f032c51d | 1613 | var date = data[j][0]; |
563c70ca | 1614 | series.push([date, data[j][i]]); |
f032c51d | 1615 | } |
6a1aa64f DV |
1616 | } |
1617 | series = this.rollingAverage(series, this.rollPeriod_); | |
1618 | ||
1619 | // Prune down to the desired range, if necessary (for zooming) | |
1a26f3fb DV |
1620 | // Because there can be lines going to points outside of the visible area, |
1621 | // we actually prune to visible points, plus one on either side. | |
9922b78b | 1622 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
6a1aa64f DV |
1623 | if (this.dateWindow_) { |
1624 | var low = this.dateWindow_[0]; | |
1625 | var high= this.dateWindow_[1]; | |
1626 | var pruned = []; | |
1a26f3fb DV |
1627 | // TODO(danvk): do binary search instead of linear search. |
1628 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. | |
1629 | var firstIdx = null, lastIdx = null; | |
6a1aa64f | 1630 | for (var k = 0; k < series.length; k++) { |
1a26f3fb DV |
1631 | if (series[k][0] >= low && firstIdx === null) { |
1632 | firstIdx = k; | |
1633 | } | |
1634 | if (series[k][0] <= high) { | |
1635 | lastIdx = k; | |
6a1aa64f DV |
1636 | } |
1637 | } | |
1a26f3fb DV |
1638 | if (firstIdx === null) firstIdx = 0; |
1639 | if (firstIdx > 0) firstIdx--; | |
1640 | if (lastIdx === null) lastIdx = series.length - 1; | |
1641 | if (lastIdx < series.length - 1) lastIdx++; | |
16269f6e | 1642 | this.boundaryIds_[i-1] = [firstIdx, lastIdx]; |
1a26f3fb DV |
1643 | for (var k = firstIdx; k <= lastIdx; k++) { |
1644 | pruned.push(series[k]); | |
6a1aa64f DV |
1645 | } |
1646 | series = pruned; | |
16269f6e NAG |
1647 | } else { |
1648 | this.boundaryIds_[i-1] = [0, series.length-1]; | |
6a1aa64f DV |
1649 | } |
1650 | ||
648acd28 DV |
1651 | var extremes = this.extremeValues_(series); |
1652 | var thisMinY = extremes[0]; | |
1653 | var thisMaxY = extremes[1]; | |
61b78cd6 DV |
1654 | if (minY === null || thisMinY < minY) minY = thisMinY; |
1655 | if (maxY === null || thisMaxY > maxY) maxY = thisMaxY; | |
5011e7a1 | 1656 | |
6a1aa64f | 1657 | if (bars) { |
354e15ab DE |
1658 | for (var j=0; j<series.length; j++) { |
1659 | val = [series[j][0], series[j][1][0], series[j][1][1], series[j][1][2]]; | |
1660 | series[j] = val; | |
1661 | } | |
43af96e7 | 1662 | } else if (this.attr_("stackedGraph")) { |
43af96e7 NK |
1663 | var l = series.length; |
1664 | var actual_y; | |
1665 | for (var j = 0; j < l; j++) { | |
354e15ab DE |
1666 | // If one data set has a NaN, let all subsequent stacked |
1667 | // sets inherit the NaN -- only start at 0 for the first set. | |
1668 | var x = series[j][0]; | |
1669 | if (cumulative_y[x] === undefined) | |
1670 | cumulative_y[x] = 0; | |
43af96e7 NK |
1671 | |
1672 | actual_y = series[j][1]; | |
354e15ab | 1673 | cumulative_y[x] += actual_y; |
43af96e7 | 1674 | |
354e15ab | 1675 | series[j] = [x, cumulative_y[x]] |
43af96e7 | 1676 | |
354e15ab DE |
1677 | if (!maxY || cumulative_y[x] > maxY) |
1678 | maxY = cumulative_y[x]; | |
43af96e7 | 1679 | } |
6a1aa64f | 1680 | } |
354e15ab DE |
1681 | |
1682 | datasets[i] = series; | |
6a1aa64f DV |
1683 | } |
1684 | ||
354e15ab | 1685 | for (var i = 1; i < datasets.length; i++) { |
4523c1f6 | 1686 | if (!this.visibility()[i - 1]) continue; |
354e15ab | 1687 | this.layout_.addDataset(this.attr_("labels")[i], datasets[i]); |
43af96e7 NK |
1688 | } |
1689 | ||
6a1aa64f DV |
1690 | // Use some heuristics to come up with a good maxY value, unless it's been |
1691 | // set explicitly by the user. | |
1692 | if (this.valueRange_ != null) { | |
1693 | this.addYTicks_(this.valueRange_[0], this.valueRange_[1]); | |
3230c662 | 1694 | this.displayedYRange_ = this.valueRange_; |
6a1aa64f | 1695 | } else { |
d053ab5a DV |
1696 | // This affects the calculation of span, below. |
1697 | if (this.attr_("includeZero") && minY > 0) { | |
1698 | minY = 0; | |
1699 | } | |
1700 | ||
6a1aa64f | 1701 | // Add some padding and round up to an integer to be human-friendly. |
3bd9c228 | 1702 | var span = maxY - minY; |
93dfacfd DV |
1703 | // special case: if we have no sense of scale, use +/-10% of the sole value. |
1704 | if (span == 0) { span = maxY; } | |
3bd9c228 DV |
1705 | var maxAxisY = maxY + 0.1 * span; |
1706 | var minAxisY = minY - 0.1 * span; | |
1707 | ||
1708 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. | |
ceb009dd DV |
1709 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; |
1710 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
3bd9c228 DV |
1711 | |
1712 | if (this.attr_("includeZero")) { | |
1713 | if (maxY < 0) maxAxisY = 0; | |
1714 | if (minY > 0) minAxisY = 0; | |
1715 | } | |
1716 | ||
1717 | this.addYTicks_(minAxisY, maxAxisY); | |
3230c662 | 1718 | this.displayedYRange_ = [minAxisY, maxAxisY]; |
6a1aa64f DV |
1719 | } |
1720 | ||
1721 | this.addXTicks_(); | |
1722 | ||
1723 | // Tell PlotKit to use this new data and render itself | |
d033ae1c | 1724 | this.layout_.updateOptions({dateWindow: this.dateWindow_}); |
6a1aa64f DV |
1725 | this.layout_.evaluateWithError(); |
1726 | this.plotter_.clear(); | |
1727 | this.plotter_.render(); | |
f6401bf6 DV |
1728 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
1729 | this.canvas_.height); | |
599fb4ad DV |
1730 | |
1731 | if (this.attr_("drawCallback") !== null) { | |
fe0b7c03 | 1732 | this.attr_("drawCallback")(this, is_initial_draw); |
599fb4ad | 1733 | } |
6a1aa64f DV |
1734 | }; |
1735 | ||
1736 | /** | |
1737 | * Calculates the rolling average of a data set. | |
1738 | * If originalData is [label, val], rolls the average of those. | |
1739 | * If originalData is [label, [, it's interpreted as [value, stddev] | |
1740 | * and the roll is returned in the same form, with appropriately reduced | |
1741 | * stddev for each value. | |
1742 | * Note that this is where fractional input (i.e. '5/10') is converted into | |
1743 | * decimal values. | |
1744 | * @param {Array} originalData The data in the appropriate format (see above) | |
1745 | * @param {Number} rollPeriod The number of days over which to average the data | |
1746 | */ | |
285a6bda | 1747 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
6a1aa64f DV |
1748 | if (originalData.length < 2) |
1749 | return originalData; | |
1750 | var rollPeriod = Math.min(rollPeriod, originalData.length - 1); | |
1751 | var rollingData = []; | |
285a6bda | 1752 | var sigma = this.attr_("sigma"); |
6a1aa64f DV |
1753 | |
1754 | if (this.fractions_) { | |
1755 | var num = 0; | |
1756 | var den = 0; // numerator/denominator | |
1757 | var mult = 100.0; | |
1758 | for (var i = 0; i < originalData.length; i++) { | |
1759 | num += originalData[i][1][0]; | |
1760 | den += originalData[i][1][1]; | |
1761 | if (i - rollPeriod >= 0) { | |
1762 | num -= originalData[i - rollPeriod][1][0]; | |
1763 | den -= originalData[i - rollPeriod][1][1]; | |
1764 | } | |
1765 | ||
1766 | var date = originalData[i][0]; | |
1767 | var value = den ? num / den : 0.0; | |
285a6bda | 1768 | if (this.attr_("errorBars")) { |
6a1aa64f DV |
1769 | if (this.wilsonInterval_) { |
1770 | // For more details on this confidence interval, see: | |
1771 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval | |
1772 | if (den) { | |
1773 | var p = value < 0 ? 0 : value, n = den; | |
1774 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); | |
1775 | var denom = 1 + sigma * sigma / den; | |
1776 | var low = (p + sigma * sigma / (2 * den) - pm) / denom; | |
1777 | var high = (p + sigma * sigma / (2 * den) + pm) / denom; | |
1778 | rollingData[i] = [date, | |
1779 | [p * mult, (p - low) * mult, (high - p) * mult]]; | |
1780 | } else { | |
1781 | rollingData[i] = [date, [0, 0, 0]]; | |
1782 | } | |
1783 | } else { | |
1784 | var stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; | |
1785 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; | |
1786 | } | |
1787 | } else { | |
1788 | rollingData[i] = [date, mult * value]; | |
1789 | } | |
1790 | } | |
9922b78b | 1791 | } else if (this.attr_("customBars")) { |
f6885d6a DV |
1792 | var low = 0; |
1793 | var mid = 0; | |
1794 | var high = 0; | |
1795 | var count = 0; | |
6a1aa64f DV |
1796 | for (var i = 0; i < originalData.length; i++) { |
1797 | var data = originalData[i][1]; | |
1798 | var y = data[1]; | |
1799 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; | |
f6885d6a | 1800 | |
8b91c51f | 1801 | if (y != null && !isNaN(y)) { |
49a7d0d5 DV |
1802 | low += data[0]; |
1803 | mid += y; | |
1804 | high += data[2]; | |
1805 | count += 1; | |
1806 | } | |
f6885d6a DV |
1807 | if (i - rollPeriod >= 0) { |
1808 | var prev = originalData[i - rollPeriod]; | |
8b91c51f | 1809 | if (prev[1][1] != null && !isNaN(prev[1][1])) { |
49a7d0d5 DV |
1810 | low -= prev[1][0]; |
1811 | mid -= prev[1][1]; | |
1812 | high -= prev[1][2]; | |
1813 | count -= 1; | |
1814 | } | |
f6885d6a DV |
1815 | } |
1816 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, | |
1817 | 1.0 * (mid - low) / count, | |
1818 | 1.0 * (high - mid) / count ]]; | |
2769de62 | 1819 | } |
6a1aa64f DV |
1820 | } else { |
1821 | // Calculate the rolling average for the first rollPeriod - 1 points where | |
1822 | // there is not enough data to roll over the full number of days | |
1823 | var num_init_points = Math.min(rollPeriod - 1, originalData.length - 2); | |
285a6bda | 1824 | if (!this.attr_("errorBars")){ |
5011e7a1 DV |
1825 | if (rollPeriod == 1) { |
1826 | return originalData; | |
1827 | } | |
1828 | ||
2847c1cf | 1829 | for (var i = 0; i < originalData.length; i++) { |
6a1aa64f | 1830 | var sum = 0; |
5011e7a1 | 1831 | var num_ok = 0; |
2847c1cf DV |
1832 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
1833 | var y = originalData[j][1]; | |
8b91c51f | 1834 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 1835 | num_ok++; |
2847c1cf | 1836 | sum += originalData[j][1]; |
6a1aa64f | 1837 | } |
5011e7a1 | 1838 | if (num_ok) { |
2847c1cf | 1839 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
5011e7a1 | 1840 | } else { |
2847c1cf | 1841 | rollingData[i] = [originalData[i][0], null]; |
5011e7a1 | 1842 | } |
6a1aa64f | 1843 | } |
2847c1cf DV |
1844 | |
1845 | } else { | |
1846 | for (var i = 0; i < originalData.length; i++) { | |
6a1aa64f DV |
1847 | var sum = 0; |
1848 | var variance = 0; | |
5011e7a1 | 1849 | var num_ok = 0; |
2847c1cf | 1850 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
5011e7a1 | 1851 | var y = originalData[j][1][0]; |
8b91c51f | 1852 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 1853 | num_ok++; |
6a1aa64f DV |
1854 | sum += originalData[j][1][0]; |
1855 | variance += Math.pow(originalData[j][1][1], 2); | |
1856 | } | |
5011e7a1 DV |
1857 | if (num_ok) { |
1858 | var stddev = Math.sqrt(variance) / num_ok; | |
1859 | rollingData[i] = [originalData[i][0], | |
1860 | [sum / num_ok, sigma * stddev, sigma * stddev]]; | |
1861 | } else { | |
1862 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
1863 | } | |
6a1aa64f DV |
1864 | } |
1865 | } | |
1866 | } | |
1867 | ||
1868 | return rollingData; | |
1869 | }; | |
1870 | ||
1871 | /** | |
1872 | * Parses a date, returning the number of milliseconds since epoch. This can be | |
285a6bda DV |
1873 | * passed in as an xValueParser in the Dygraph constructor. |
1874 | * TODO(danvk): enumerate formats that this understands. | |
6a1aa64f DV |
1875 | * @param {String} A date in YYYYMMDD format. |
1876 | * @return {Number} Milliseconds since epoch. | |
1877 | * @public | |
1878 | */ | |
285a6bda | 1879 | Dygraph.dateParser = function(dateStr, self) { |
6a1aa64f | 1880 | var dateStrSlashed; |
285a6bda | 1881 | var d; |
986a5026 | 1882 | if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12' |
6a1aa64f | 1883 | dateStrSlashed = dateStr.replace("-", "/", "g"); |
353a0294 DV |
1884 | while (dateStrSlashed.search("-") != -1) { |
1885 | dateStrSlashed = dateStrSlashed.replace("-", "/"); | |
1886 | } | |
285a6bda | 1887 | d = Date.parse(dateStrSlashed); |
2769de62 | 1888 | } else if (dateStr.length == 8) { // e.g. '20090712' |
285a6bda | 1889 | // TODO(danvk): remove support for this format. It's confusing. |
6a1aa64f DV |
1890 | dateStrSlashed = dateStr.substr(0,4) + "/" + dateStr.substr(4,2) |
1891 | + "/" + dateStr.substr(6,2); | |
285a6bda | 1892 | d = Date.parse(dateStrSlashed); |
2769de62 DV |
1893 | } else { |
1894 | // Any format that Date.parse will accept, e.g. "2009/07/12" or | |
1895 | // "2009/07/12 12:34:56" | |
285a6bda DV |
1896 | d = Date.parse(dateStr); |
1897 | } | |
1898 | ||
1899 | if (!d || isNaN(d)) { | |
1900 | self.error("Couldn't parse " + dateStr + " as a date"); | |
1901 | } | |
1902 | return d; | |
1903 | }; | |
1904 | ||
1905 | /** | |
1906 | * Detects the type of the str (date or numeric) and sets the various | |
1907 | * formatting attributes in this.attrs_ based on this type. | |
1908 | * @param {String} str An x value. | |
1909 | * @private | |
1910 | */ | |
1911 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
1912 | var isDate = false; | |
1913 | if (str.indexOf('-') >= 0 || | |
1914 | str.indexOf('/') >= 0 || | |
1915 | isNaN(parseFloat(str))) { | |
1916 | isDate = true; | |
1917 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
1918 | // TODO(danvk): remove support for this format. | |
1919 | isDate = true; | |
1920 | } | |
1921 | ||
1922 | if (isDate) { | |
1923 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
1924 | this.attrs_.xValueParser = Dygraph.dateParser; | |
1925 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 1926 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
1927 | } else { |
1928 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
1929 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
1930 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 1931 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
6a1aa64f | 1932 | } |
6a1aa64f DV |
1933 | }; |
1934 | ||
1935 | /** | |
1936 | * Parses a string in a special csv format. We expect a csv file where each | |
1937 | * line is a date point, and the first field in each line is the date string. | |
1938 | * We also expect that all remaining fields represent series. | |
285a6bda | 1939 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f DV |
1940 | * date, series1, stddev1, series2, stddev2, ... |
1941 | * @param {Array.<Object>} data See above. | |
1942 | * @private | |
285a6bda DV |
1943 | * |
1944 | * @return Array.<Object> An array with one entry for each row. These entries | |
1945 | * are an array of cells in that row. The first entry is the parsed x-value for | |
1946 | * the row. The second, third, etc. are the y-values. These can take on one of | |
1947 | * three forms, depending on the CSV and constructor parameters: | |
1948 | * 1. numeric value | |
1949 | * 2. [ value, stddev ] | |
1950 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 1951 | */ |
285a6bda | 1952 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f DV |
1953 | var ret = []; |
1954 | var lines = data.split("\n"); | |
3d67f03b DV |
1955 | |
1956 | // Use the default delimiter or fall back to a tab if that makes sense. | |
1957 | var delim = this.attr_('delimiter'); | |
1958 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { | |
1959 | delim = '\t'; | |
1960 | } | |
1961 | ||
285a6bda | 1962 | var start = 0; |
6a1aa64f | 1963 | if (this.labelsFromCSV_) { |
285a6bda | 1964 | start = 1; |
3d67f03b | 1965 | this.attrs_.labels = lines[0].split(delim); |
6a1aa64f DV |
1966 | } |
1967 | ||
03b522a4 DV |
1968 | // Parse the x as a float or return null if it's not a number. |
1969 | var parseFloatOrNull = function(x) { | |
41333ec0 DV |
1970 | var val = parseFloat(x); |
1971 | return isNaN(val) ? null : val; | |
03b522a4 DV |
1972 | }; |
1973 | ||
285a6bda DV |
1974 | var xParser; |
1975 | var defaultParserSet = false; // attempt to auto-detect x value type | |
1976 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 1977 | var outOfOrder = false; |
6a1aa64f DV |
1978 | for (var i = start; i < lines.length; i++) { |
1979 | var line = lines[i]; | |
1980 | if (line.length == 0) continue; // skip blank lines | |
3d67f03b DV |
1981 | if (line[0] == '#') continue; // skip comment lines |
1982 | var inFields = line.split(delim); | |
285a6bda | 1983 | if (inFields.length < 2) continue; |
6a1aa64f DV |
1984 | |
1985 | var fields = []; | |
285a6bda DV |
1986 | if (!defaultParserSet) { |
1987 | this.detectTypeFromString_(inFields[0]); | |
1988 | xParser = this.attr_("xValueParser"); | |
1989 | defaultParserSet = true; | |
1990 | } | |
1991 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
1992 | |
1993 | // If fractions are expected, parse the numbers as "A/B" | |
1994 | if (this.fractions_) { | |
1995 | for (var j = 1; j < inFields.length; j++) { | |
1996 | // TODO(danvk): figure out an appropriate way to flag parse errors. | |
1997 | var vals = inFields[j].split("/"); | |
03b522a4 | 1998 | fields[j] = [parseFloatOrNull(vals[0]), parseFloatOrNull(vals[1])]; |
6a1aa64f | 1999 | } |
285a6bda | 2000 | } else if (this.attr_("errorBars")) { |
6a1aa64f DV |
2001 | // If there are error bars, values are (value, stddev) pairs |
2002 | for (var j = 1; j < inFields.length; j += 2) | |
03b522a4 DV |
2003 | fields[(j + 1) / 2] = [parseFloatOrNull(inFields[j]), |
2004 | parseFloatOrNull(inFields[j + 1])]; | |
9922b78b | 2005 | } else if (this.attr_("customBars")) { |
6a1aa64f DV |
2006 | // Bars are a low;center;high tuple |
2007 | for (var j = 1; j < inFields.length; j++) { | |
2008 | var vals = inFields[j].split(";"); | |
03b522a4 DV |
2009 | fields[j] = [ parseFloatOrNull(vals[0]), |
2010 | parseFloatOrNull(vals[1]), | |
2011 | parseFloatOrNull(vals[2]) ]; | |
6a1aa64f DV |
2012 | } |
2013 | } else { | |
2014 | // Values are just numbers | |
285a6bda | 2015 | for (var j = 1; j < inFields.length; j++) { |
03b522a4 | 2016 | fields[j] = parseFloatOrNull(inFields[j]); |
285a6bda | 2017 | } |
6a1aa64f | 2018 | } |
987840a2 DV |
2019 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
2020 | outOfOrder = true; | |
2021 | } | |
6a1aa64f | 2022 | ret.push(fields); |
285a6bda DV |
2023 | |
2024 | if (fields.length != expectedCols) { | |
2025 | this.error("Number of columns in line " + i + " (" + fields.length + | |
2026 | ") does not agree with number of labels (" + expectedCols + | |
2027 | ") " + line); | |
2028 | } | |
6a1aa64f | 2029 | } |
987840a2 DV |
2030 | |
2031 | if (outOfOrder) { | |
2032 | this.warn("CSV is out of order; order it correctly to speed loading."); | |
2033 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2034 | } | |
2035 | ||
6a1aa64f DV |
2036 | return ret; |
2037 | }; | |
2038 | ||
2039 | /** | |
285a6bda DV |
2040 | * The user has provided their data as a pre-packaged JS array. If the x values |
2041 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
2042 | * are dates, we need to convert them from Date objects to ms since epoch. | |
2043 | * @param {Array.<Object>} data | |
2044 | * @return {Array.<Object>} data with numeric x values. | |
2045 | */ | |
2046 | Dygraph.prototype.parseArray_ = function(data) { | |
2047 | // Peek at the first x value to see if it's numeric. | |
2048 | if (data.length == 0) { | |
2049 | this.error("Can't plot empty data set"); | |
2050 | return null; | |
2051 | } | |
2052 | if (data[0].length == 0) { | |
2053 | this.error("Data set cannot contain an empty row"); | |
2054 | return null; | |
2055 | } | |
2056 | ||
2057 | if (this.attr_("labels") == null) { | |
2058 | this.warn("Using default labels. Set labels explicitly via 'labels' " + | |
2059 | "in the options parameter"); | |
2060 | this.attrs_.labels = [ "X" ]; | |
2061 | for (var i = 1; i < data[0].length; i++) { | |
2062 | this.attrs_.labels.push("Y" + i); | |
2063 | } | |
2064 | } | |
2065 | ||
2dda3850 | 2066 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda DV |
2067 | // Some intelligent defaults for a date x-axis. |
2068 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
bf640e56 | 2069 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
2070 | this.attrs_.xTicker = Dygraph.dateTicker; |
2071 | ||
2072 | // Assume they're all dates. | |
e3ab7b40 | 2073 | var parsedData = Dygraph.clone(data); |
285a6bda DV |
2074 | for (var i = 0; i < data.length; i++) { |
2075 | if (parsedData[i].length == 0) { | |
a323ff4a | 2076 | this.error("Row " + (1 + i) + " of data is empty"); |
285a6bda DV |
2077 | return null; |
2078 | } | |
2079 | if (parsedData[i][0] == null | |
3a909ec5 DV |
2080 | || typeof(parsedData[i][0].getTime) != 'function' |
2081 | || isNaN(parsedData[i][0].getTime())) { | |
be96a1f5 | 2082 | this.error("x value in row " + (1 + i) + " is not a Date"); |
285a6bda DV |
2083 | return null; |
2084 | } | |
2085 | parsedData[i][0] = parsedData[i][0].getTime(); | |
2086 | } | |
2087 | return parsedData; | |
2088 | } else { | |
2089 | // Some intelligent defaults for a numeric x-axis. | |
2090 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
2091 | this.attrs_.xTicker = Dygraph.numericTicks; | |
2092 | return data; | |
2093 | } | |
2094 | }; | |
2095 | ||
2096 | /** | |
79420a1e DV |
2097 | * Parses a DataTable object from gviz. |
2098 | * The data is expected to have a first column that is either a date or a | |
2099 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
2100 | * between this.xValueParser_ and the type of the first column, it will be | |
a685723c | 2101 | * fixed. Fills out rawData_. |
79420a1e DV |
2102 | * @param {Array.<Object>} data See above. |
2103 | * @private | |
2104 | */ | |
285a6bda | 2105 | Dygraph.prototype.parseDataTable_ = function(data) { |
79420a1e DV |
2106 | var cols = data.getNumberOfColumns(); |
2107 | var rows = data.getNumberOfRows(); | |
2108 | ||
d955e223 | 2109 | var indepType = data.getColumnType(0); |
4440f6c8 | 2110 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda DV |
2111 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
2112 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2113 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2114 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
33127159 | 2115 | } else if (indepType == 'number') { |
285a6bda DV |
2116 | this.attrs_.xValueFormatter = function(x) { return x; }; |
2117 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
2118 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2119 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
285a6bda | 2120 | } else { |
987840a2 DV |
2121 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
2122 | "column 1 of DataTable input (Got '" + indepType + "')"); | |
79420a1e DV |
2123 | return null; |
2124 | } | |
2125 | ||
a685723c DV |
2126 | // Array of the column indices which contain data (and not annotations). |
2127 | var colIdx = []; | |
2128 | var annotationCols = {}; // data index -> [annotation cols] | |
2129 | var hasAnnotations = false; | |
2130 | for (var i = 1; i < cols; i++) { | |
2131 | var type = data.getColumnType(i); | |
2132 | if (type == 'number') { | |
2133 | colIdx.push(i); | |
2134 | } else if (type == 'string' && this.attr_('displayAnnotations')) { | |
2135 | // This is OK -- it's an annotation column. | |
2136 | var dataIdx = colIdx[colIdx.length - 1]; | |
2137 | if (!annotationCols.hasOwnProperty(dataIdx)) { | |
2138 | annotationCols[dataIdx] = [i]; | |
2139 | } else { | |
2140 | annotationCols[dataIdx].push(i); | |
2141 | } | |
2142 | hasAnnotations = true; | |
2143 | } else { | |
2144 | this.error("Only 'number' is supported as a dependent type with Gviz." + | |
2145 | " 'string' is only supported if displayAnnotations is true"); | |
2146 | } | |
2147 | } | |
2148 | ||
2149 | // Read column labels | |
2150 | // TODO(danvk): add support back for errorBars | |
2151 | var labels = [data.getColumnLabel(0)]; | |
2152 | for (var i = 0; i < colIdx.length; i++) { | |
2153 | labels.push(data.getColumnLabel(colIdx[i])); | |
2154 | } | |
2155 | this.attrs_.labels = labels; | |
2156 | cols = labels.length; | |
2157 | ||
79420a1e | 2158 | var ret = []; |
987840a2 | 2159 | var outOfOrder = false; |
a685723c | 2160 | var annotations = []; |
79420a1e DV |
2161 | for (var i = 0; i < rows; i++) { |
2162 | var row = []; | |
debe4434 DV |
2163 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
2164 | data.getValue(i, 0) === null) { | |
129569a5 FD |
2165 | this.warn("Ignoring row " + i + |
2166 | " of DataTable because of undefined or null first column."); | |
debe4434 DV |
2167 | continue; |
2168 | } | |
2169 | ||
c21d2c2d | 2170 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
2171 | row.push(data.getValue(i, 0).getTime()); |
2172 | } else { | |
2173 | row.push(data.getValue(i, 0)); | |
2174 | } | |
3e3f84e4 | 2175 | if (!this.attr_("errorBars")) { |
a685723c DV |
2176 | for (var j = 0; j < colIdx.length; j++) { |
2177 | var col = colIdx[j]; | |
2178 | row.push(data.getValue(i, col)); | |
2179 | if (hasAnnotations && | |
2180 | annotationCols.hasOwnProperty(col) && | |
2181 | data.getValue(i, annotationCols[col][0]) != null) { | |
2182 | var ann = {}; | |
2183 | ann.series = data.getColumnLabel(col); | |
2184 | ann.xval = row[0]; | |
2185 | ann.shortText = String.fromCharCode(65 /* A */ + annotations.length) | |
2186 | ann.text = ''; | |
2187 | for (var k = 0; k < annotationCols[col].length; k++) { | |
2188 | if (k) ann.text += "\n"; | |
2189 | ann.text += data.getValue(i, annotationCols[col][k]); | |
2190 | } | |
2191 | annotations.push(ann); | |
2192 | } | |
3e3f84e4 DV |
2193 | } |
2194 | } else { | |
2195 | for (var j = 0; j < cols - 1; j++) { | |
2196 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); | |
2197 | } | |
79420a1e | 2198 | } |
987840a2 DV |
2199 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
2200 | outOfOrder = true; | |
2201 | } | |
243d96e8 | 2202 | ret.push(row); |
79420a1e | 2203 | } |
987840a2 DV |
2204 | |
2205 | if (outOfOrder) { | |
2206 | this.warn("DataTable is out of order; order it correctly to speed loading."); | |
2207 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2208 | } | |
a685723c DV |
2209 | this.rawData_ = ret; |
2210 | ||
2211 | if (annotations.length > 0) { | |
2212 | this.setAnnotations(annotations, true); | |
2213 | } | |
79420a1e DV |
2214 | } |
2215 | ||
24e5350c | 2216 | // These functions are all based on MochiKit. |
fc80a396 DV |
2217 | Dygraph.update = function (self, o) { |
2218 | if (typeof(o) != 'undefined' && o !== null) { | |
2219 | for (var k in o) { | |
85b99f0b DV |
2220 | if (o.hasOwnProperty(k)) { |
2221 | self[k] = o[k]; | |
2222 | } | |
fc80a396 DV |
2223 | } |
2224 | } | |
2225 | return self; | |
2226 | }; | |
2227 | ||
2dda3850 DV |
2228 | Dygraph.isArrayLike = function (o) { |
2229 | var typ = typeof(o); | |
2230 | if ( | |
c21d2c2d | 2231 | (typ != 'object' && !(typ == 'function' && |
2dda3850 DV |
2232 | typeof(o.item) == 'function')) || |
2233 | o === null || | |
2234 | typeof(o.length) != 'number' || | |
2235 | o.nodeType === 3 | |
2236 | ) { | |
2237 | return false; | |
2238 | } | |
2239 | return true; | |
2240 | }; | |
2241 | ||
2242 | Dygraph.isDateLike = function (o) { | |
2243 | if (typeof(o) != "object" || o === null || | |
2244 | typeof(o.getTime) != 'function') { | |
2245 | return false; | |
2246 | } | |
2247 | return true; | |
2248 | }; | |
2249 | ||
e3ab7b40 DV |
2250 | Dygraph.clone = function(o) { |
2251 | // TODO(danvk): figure out how MochiKit's version works | |
2252 | var r = []; | |
2253 | for (var i = 0; i < o.length; i++) { | |
2254 | if (Dygraph.isArrayLike(o[i])) { | |
2255 | r.push(Dygraph.clone(o[i])); | |
2256 | } else { | |
2257 | r.push(o[i]); | |
2258 | } | |
2259 | } | |
2260 | return r; | |
24e5350c DV |
2261 | }; |
2262 | ||
2dda3850 | 2263 | |
79420a1e | 2264 | /** |
6a1aa64f DV |
2265 | * Get the CSV data. If it's in a function, call that function. If it's in a |
2266 | * file, do an XMLHttpRequest to get it. | |
2267 | * @private | |
2268 | */ | |
285a6bda | 2269 | Dygraph.prototype.start_ = function() { |
6a1aa64f | 2270 | if (typeof this.file_ == 'function') { |
285a6bda | 2271 | // CSV string. Pretend we got it via XHR. |
6a1aa64f | 2272 | this.loadedEvent_(this.file_()); |
2dda3850 | 2273 | } else if (Dygraph.isArrayLike(this.file_)) { |
285a6bda DV |
2274 | this.rawData_ = this.parseArray_(this.file_); |
2275 | this.drawGraph_(this.rawData_); | |
79420a1e DV |
2276 | } else if (typeof this.file_ == 'object' && |
2277 | typeof this.file_.getColumnRange == 'function') { | |
2278 | // must be a DataTable from gviz. | |
a685723c | 2279 | this.parseDataTable_(this.file_); |
79420a1e | 2280 | this.drawGraph_(this.rawData_); |
285a6bda DV |
2281 | } else if (typeof this.file_ == 'string') { |
2282 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. | |
2283 | if (this.file_.indexOf('\n') >= 0) { | |
2284 | this.loadedEvent_(this.file_); | |
2285 | } else { | |
2286 | var req = new XMLHttpRequest(); | |
2287 | var caller = this; | |
2288 | req.onreadystatechange = function () { | |
2289 | if (req.readyState == 4) { | |
2290 | if (req.status == 200) { | |
2291 | caller.loadedEvent_(req.responseText); | |
2292 | } | |
6a1aa64f | 2293 | } |
285a6bda | 2294 | }; |
6a1aa64f | 2295 | |
285a6bda DV |
2296 | req.open("GET", this.file_, true); |
2297 | req.send(null); | |
2298 | } | |
2299 | } else { | |
2300 | this.error("Unknown data format: " + (typeof this.file_)); | |
6a1aa64f DV |
2301 | } |
2302 | }; | |
2303 | ||
2304 | /** | |
2305 | * Changes various properties of the graph. These can include: | |
2306 | * <ul> | |
2307 | * <li>file: changes the source data for the graph</li> | |
2308 | * <li>errorBars: changes whether the data contains stddev</li> | |
2309 | * </ul> | |
2310 | * @param {Object} attrs The new properties and values | |
2311 | */ | |
285a6bda DV |
2312 | Dygraph.prototype.updateOptions = function(attrs) { |
2313 | // TODO(danvk): this is a mess. Rethink this function. | |
6a1aa64f DV |
2314 | if (attrs.rollPeriod) { |
2315 | this.rollPeriod_ = attrs.rollPeriod; | |
2316 | } | |
2317 | if (attrs.dateWindow) { | |
2318 | this.dateWindow_ = attrs.dateWindow; | |
2319 | } | |
2320 | if (attrs.valueRange) { | |
2321 | this.valueRange_ = attrs.valueRange; | |
2322 | } | |
450fe64b DV |
2323 | |
2324 | // TODO(danvk): validate per-series options. | |
46dde5f9 DV |
2325 | // Supported: |
2326 | // strokeWidth | |
2327 | // pointSize | |
2328 | // drawPoints | |
2329 | // highlightCircleSize | |
450fe64b | 2330 | |
fc80a396 | 2331 | Dygraph.update(this.user_attrs_, attrs); |
87bb7958 | 2332 | Dygraph.update(this.renderOptions_, attrs); |
285a6bda DV |
2333 | |
2334 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
2335 | ||
2336 | // TODO(danvk): this doesn't match the constructor logic | |
2337 | this.layout_.updateOptions({ 'errorBars': this.attr_("errorBars") }); | |
5e50289f | 2338 | if (attrs['file']) { |
6a1aa64f DV |
2339 | this.file_ = attrs['file']; |
2340 | this.start_(); | |
2341 | } else { | |
2342 | this.drawGraph_(this.rawData_); | |
2343 | } | |
2344 | }; | |
2345 | ||
2346 | /** | |
697e70b2 DV |
2347 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
2348 | * containing div (which has presumably changed size since the dygraph was | |
2349 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
2350 | * |
2351 | * This is far more efficient than destroying and re-instantiating a | |
2352 | * Dygraph, since it doesn't have to reparse the underlying data. | |
2353 | * | |
697e70b2 DV |
2354 | * @param {Number} width Width (in pixels) |
2355 | * @param {Number} height Height (in pixels) | |
2356 | */ | |
2357 | Dygraph.prototype.resize = function(width, height) { | |
e8c7ef86 DV |
2358 | if (this.resize_lock) { |
2359 | return; | |
2360 | } | |
2361 | this.resize_lock = true; | |
2362 | ||
697e70b2 DV |
2363 | if ((width === null) != (height === null)) { |
2364 | this.warn("Dygraph.resize() should be called with zero parameters or " + | |
2365 | "two non-NULL parameters. Pretending it was zero."); | |
2366 | width = height = null; | |
2367 | } | |
2368 | ||
b16e6369 | 2369 | // TODO(danvk): there should be a clear() method. |
697e70b2 | 2370 | this.maindiv_.innerHTML = ""; |
b16e6369 DV |
2371 | this.attrs_.labelsDiv = null; |
2372 | ||
697e70b2 DV |
2373 | if (width) { |
2374 | this.maindiv_.style.width = width + "px"; | |
2375 | this.maindiv_.style.height = height + "px"; | |
2376 | this.width_ = width; | |
2377 | this.height_ = height; | |
2378 | } else { | |
2379 | this.width_ = this.maindiv_.offsetWidth; | |
2380 | this.height_ = this.maindiv_.offsetHeight; | |
2381 | } | |
2382 | ||
2383 | this.createInterface_(); | |
964f30c6 | 2384 | this.drawGraph_(this.rawData_); |
e8c7ef86 DV |
2385 | |
2386 | this.resize_lock = false; | |
697e70b2 DV |
2387 | }; |
2388 | ||
2389 | /** | |
6a1aa64f DV |
2390 | * Adjusts the number of days in the rolling average. Updates the graph to |
2391 | * reflect the new averaging period. | |
2392 | * @param {Number} length Number of days over which to average the data. | |
2393 | */ | |
285a6bda | 2394 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f DV |
2395 | this.rollPeriod_ = length; |
2396 | this.drawGraph_(this.rawData_); | |
2397 | }; | |
540d00f1 | 2398 | |
f8cfec73 | 2399 | /** |
1cf11047 DV |
2400 | * Returns a boolean array of visibility statuses. |
2401 | */ | |
2402 | Dygraph.prototype.visibility = function() { | |
2403 | // Do lazy-initialization, so that this happens after we know the number of | |
2404 | // data series. | |
2405 | if (!this.attr_("visibility")) { | |
f38dec01 | 2406 | this.attrs_["visibility"] = []; |
1cf11047 DV |
2407 | } |
2408 | while (this.attr_("visibility").length < this.rawData_[0].length - 1) { | |
f38dec01 | 2409 | this.attr_("visibility").push(true); |
1cf11047 DV |
2410 | } |
2411 | return this.attr_("visibility"); | |
2412 | }; | |
2413 | ||
2414 | /** | |
2415 | * Changes the visiblity of a series. | |
2416 | */ | |
2417 | Dygraph.prototype.setVisibility = function(num, value) { | |
2418 | var x = this.visibility(); | |
2419 | if (num < 0 && num >= x.length) { | |
2420 | this.warn("invalid series number in setVisibility: " + num); | |
2421 | } else { | |
2422 | x[num] = value; | |
2423 | this.drawGraph_(this.rawData_); | |
2424 | } | |
2425 | }; | |
2426 | ||
2427 | /** | |
5c528fa2 DV |
2428 | * Update the list of annotations and redraw the chart. |
2429 | */ | |
a685723c | 2430 | Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { |
5c528fa2 DV |
2431 | this.annotations_ = ann; |
2432 | this.layout_.setAnnotations(this.annotations_); | |
a685723c DV |
2433 | if (!suppressDraw) { |
2434 | this.drawGraph_(this.rawData_); | |
2435 | } | |
5c528fa2 DV |
2436 | }; |
2437 | ||
2438 | /** | |
2439 | * Return the list of annotations. | |
2440 | */ | |
2441 | Dygraph.prototype.annotations = function() { | |
2442 | return this.annotations_; | |
2443 | }; | |
2444 | ||
46dde5f9 DV |
2445 | /** |
2446 | * Get the index of a series (column) given its name. The first column is the | |
2447 | * x-axis, so the data series start with index 1. | |
2448 | */ | |
2449 | Dygraph.prototype.indexFromSetName = function(name) { | |
2450 | var labels = this.attr_("labels"); | |
2451 | for (var i = 0; i < labels.length; i++) { | |
2452 | if (labels[i] == name) return i; | |
2453 | } | |
2454 | return null; | |
2455 | }; | |
2456 | ||
5c528fa2 DV |
2457 | Dygraph.addAnnotationRule = function() { |
2458 | if (Dygraph.addedAnnotationCSS) return; | |
2459 | ||
18a016b1 DV |
2460 | var mysheet; |
2461 | if (document.styleSheets.length > 0) { | |
2462 | mysheet = document.styleSheets[0]; | |
2463 | } else { | |
2464 | var styleSheetElement = document.createElement("style"); | |
2465 | styleSheetElement.type = "text/css"; | |
2466 | document.getElementsByTagName("head")[0].appendChild(styleSheetElement); | |
2467 | for(i = 0; i < document.styleSheets.length; i++) { | |
2468 | if (document.styleSheets[i].disabled) continue; | |
2469 | mysheet = document.styleSheets[i]; | |
2470 | } | |
2471 | } | |
2472 | ||
5c528fa2 DV |
2473 | var rule = "border: 1px solid black; " + |
2474 | "background-color: white; " + | |
2475 | "text-align: center;"; | |
2476 | if (mysheet.insertRule) { // Firefox | |
b39466eb | 2477 | mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", 0); |
5c528fa2 DV |
2478 | } else if (mysheet.addRule) { // IE |
2479 | mysheet.addRule(".dygraphDefaultAnnotation", rule); | |
2480 | } | |
2481 | ||
2482 | Dygraph.addedAnnotationCSS = true; | |
2483 | } | |
2484 | ||
2485 | /** | |
f8cfec73 DV |
2486 | * Create a new canvas element. This is more complex than a simple |
2487 | * document.createElement("canvas") because of IE and excanvas. | |
2488 | */ | |
2489 | Dygraph.createCanvas = function() { | |
2490 | var canvas = document.createElement("canvas"); | |
2491 | ||
2492 | isIE = (/MSIE/.test(navigator.userAgent) && !window.opera); | |
2493 | if (isIE) { | |
2494 | canvas = G_vmlCanvasManager.initElement(canvas); | |
2495 | } | |
2496 | ||
2497 | return canvas; | |
2498 | }; | |
2499 | ||
540d00f1 DV |
2500 | |
2501 | /** | |
285a6bda | 2502 | * A wrapper around Dygraph that implements the gviz API. |
540d00f1 DV |
2503 | * @param {Object} container The DOM object the visualization should live in. |
2504 | */ | |
285a6bda | 2505 | Dygraph.GVizChart = function(container) { |
540d00f1 DV |
2506 | this.container = container; |
2507 | } | |
2508 | ||
285a6bda | 2509 | Dygraph.GVizChart.prototype.draw = function(data, options) { |
540d00f1 | 2510 | this.container.innerHTML = ''; |
285a6bda | 2511 | this.date_graph = new Dygraph(this.container, data, options); |
540d00f1 | 2512 | } |
285a6bda | 2513 | |
239c712d NAG |
2514 | /** |
2515 | * Google charts compatible setSelection | |
50360fd0 | 2516 | * Only row selection is supported, all points in the row will be highlighted |
239c712d NAG |
2517 | * @param {Array} array of the selected cells |
2518 | * @public | |
2519 | */ | |
2520 | Dygraph.GVizChart.prototype.setSelection = function(selection_array) { | |
2521 | var row = false; | |
2522 | if (selection_array.length) { | |
2523 | row = selection_array[0].row; | |
2524 | } | |
2525 | this.date_graph.setSelection(row); | |
2526 | } | |
2527 | ||
103b7292 NAG |
2528 | /** |
2529 | * Google charts compatible getSelection implementation | |
2530 | * @return {Array} array of the selected cells | |
2531 | * @public | |
2532 | */ | |
2533 | Dygraph.GVizChart.prototype.getSelection = function() { | |
2534 | var selection = []; | |
50360fd0 | 2535 | |
103b7292 | 2536 | var row = this.date_graph.getSelection(); |
50360fd0 | 2537 | |
103b7292 | 2538 | if (row < 0) return selection; |
50360fd0 | 2539 | |
103b7292 NAG |
2540 | col = 1; |
2541 | for (var i in this.date_graph.layout_.datasets) { | |
2542 | selection.push({row: row, column: col}); | |
2543 | col++; | |
2544 | } | |
2545 | ||
2546 | return selection; | |
2547 | } | |
2548 | ||
285a6bda DV |
2549 | // Older pages may still use this name. |
2550 | DateGraph = Dygraph; |