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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, | |
93 | labelsKMB: false, | |
afefbcdb | 94 | labelsKMG2: false, |
285a6bda DV |
95 | |
96 | strokeWidth: 1.0, | |
8e4a6af3 | 97 | |
8846615a DV |
98 | axisTickSize: 3, |
99 | axisLabelFontSize: 14, | |
100 | xAxisLabelWidth: 50, | |
101 | yAxisLabelWidth: 50, | |
102 | rightGap: 5, | |
285a6bda DV |
103 | |
104 | showRoller: false, | |
105 | xValueFormatter: Dygraph.dateString_, | |
106 | xValueParser: Dygraph.dateParser, | |
107 | xTicker: Dygraph.dateTicker, | |
108 | ||
3d67f03b DV |
109 | delimiter: ',', |
110 | ||
ff00d3e2 | 111 | logScale: false, |
285a6bda DV |
112 | sigma: 2.0, |
113 | errorBars: false, | |
114 | fractions: false, | |
115 | wilsonInterval: true, // only relevant if fractions is true | |
5954ef32 | 116 | customBars: false, |
43af96e7 NK |
117 | fillGraph: false, |
118 | fillAlpha: 0.15, | |
119 | ||
120 | stackedGraph: false, | |
121 | hideOverlayOnMouseOut: true | |
285a6bda DV |
122 | }; |
123 | ||
124 | // Various logging levels. | |
125 | Dygraph.DEBUG = 1; | |
126 | Dygraph.INFO = 2; | |
127 | Dygraph.WARNING = 3; | |
128 | Dygraph.ERROR = 3; | |
129 | ||
130 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { | |
131 | // Labels is no longer a constructor parameter, since it's typically set | |
132 | // directly from the data source. It also conains a name for the x-axis, | |
133 | // which the previous constructor form did not. | |
134 | if (labels != null) { | |
135 | var new_labels = ["Date"]; | |
136 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); | |
fc80a396 | 137 | Dygraph.update(attrs, { 'labels': new_labels }); |
285a6bda DV |
138 | } |
139 | this.__init__(div, file, attrs); | |
8e4a6af3 DV |
140 | }; |
141 | ||
6a1aa64f | 142 | /** |
285a6bda | 143 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
6a1aa64f DV |
144 | * and interaction <canvas> inside of it. See the constructor for details |
145 | * on the parameters. | |
146 | * @param {String | Function} file Source data | |
147 | * @param {Array.<String>} labels Names of the data series | |
148 | * @param {Object} attrs Miscellaneous other options | |
149 | * @private | |
150 | */ | |
285a6bda DV |
151 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
152 | // Support two-argument constructor | |
153 | if (attrs == null) { attrs = {}; } | |
154 | ||
6a1aa64f | 155 | // Copy the important bits into the object |
32988383 | 156 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
6a1aa64f | 157 | this.maindiv_ = div; |
6a1aa64f | 158 | this.file_ = file; |
285a6bda | 159 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
6a1aa64f | 160 | this.previousVerticalX_ = -1; |
6a1aa64f | 161 | this.fractions_ = attrs.fractions || false; |
6a1aa64f DV |
162 | this.dateWindow_ = attrs.dateWindow || null; |
163 | this.valueRange_ = attrs.valueRange || null; | |
6a1aa64f | 164 | this.wilsonInterval_ = attrs.wilsonInterval || true; |
fe0b7c03 | 165 | this.is_initial_draw_ = true; |
8e4a6af3 | 166 | |
f7d6278e DV |
167 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
168 | // div, then only one will be drawn. | |
169 | div.innerHTML = ""; | |
170 | ||
c21d2c2d | 171 | // If the div isn't already sized then inherit from our attrs or |
172 | // give it a default size. | |
285a6bda | 173 | if (div.style.width == '') { |
c21d2c2d | 174 | div.style.width = attrs.width || Dygraph.DEFAULT_WIDTH + "px"; |
285a6bda DV |
175 | } |
176 | if (div.style.height == '') { | |
c21d2c2d | 177 | div.style.height = attrs.height || Dygraph.DEFAULT_HEIGHT + "px"; |
32988383 | 178 | } |
285a6bda DV |
179 | this.width_ = parseInt(div.style.width, 10); |
180 | this.height_ = parseInt(div.style.height, 10); | |
c21d2c2d | 181 | // The div might have been specified as percent of the current window size, |
182 | // convert that to an appropriate number of pixels. | |
183 | if (div.style.width.indexOf("%") == div.style.width.length - 1) { | |
184 | // Minus ten pixels keeps scrollbars from showing up for a 100% width div. | |
185 | this.width_ = (this.width_ * self.innerWidth / 100) - 10; | |
186 | } | |
187 | if (div.style.height.indexOf("%") == div.style.height.length - 1) { | |
188 | this.height_ = (this.height_ * self.innerHeight / 100) - 10; | |
189 | } | |
32988383 | 190 | |
344ba8c0 | 191 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
43af96e7 NK |
192 | if (attrs['stackedGraph']) { |
193 | attrs['fillGraph'] = true; | |
194 | // TODO(nikhilk): Add any other stackedGraph checks here. | |
195 | } | |
196 | ||
285a6bda DV |
197 | // Dygraphs has many options, some of which interact with one another. |
198 | // To keep track of everything, we maintain two sets of options: | |
199 | // | |
c21d2c2d | 200 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
201 | // this.attrs_ defaults, options derived from user_attrs_, data. |
202 | // | |
203 | // Options are then accessed this.attr_('attr'), which first looks at | |
204 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
205 | // defaults without overriding behavior that the user specifically asks for. | |
206 | this.user_attrs_ = {}; | |
fc80a396 | 207 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 208 | |
285a6bda | 209 | this.attrs_ = {}; |
fc80a396 | 210 | Dygraph.update(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 211 | |
285a6bda DV |
212 | // Make a note of whether labels will be pulled from the CSV file. |
213 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
6a1aa64f DV |
214 | |
215 | // Create the containing DIV and other interactive elements | |
216 | this.createInterface_(); | |
217 | ||
738fc797 | 218 | this.start_(); |
6a1aa64f DV |
219 | }; |
220 | ||
285a6bda DV |
221 | Dygraph.prototype.attr_ = function(name) { |
222 | if (typeof(this.user_attrs_[name]) != 'undefined') { | |
223 | return this.user_attrs_[name]; | |
224 | } else if (typeof(this.attrs_[name]) != 'undefined') { | |
225 | return this.attrs_[name]; | |
226 | } else { | |
227 | return null; | |
228 | } | |
229 | }; | |
230 | ||
231 | // TODO(danvk): any way I can get the line numbers to be this.warn call? | |
232 | Dygraph.prototype.log = function(severity, message) { | |
233 | if (typeof(console) != 'undefined') { | |
234 | switch (severity) { | |
235 | case Dygraph.DEBUG: | |
236 | console.debug('dygraphs: ' + message); | |
237 | break; | |
238 | case Dygraph.INFO: | |
239 | console.info('dygraphs: ' + message); | |
240 | break; | |
241 | case Dygraph.WARNING: | |
242 | console.warn('dygraphs: ' + message); | |
243 | break; | |
244 | case Dygraph.ERROR: | |
245 | console.error('dygraphs: ' + message); | |
246 | break; | |
247 | } | |
248 | } | |
249 | } | |
250 | Dygraph.prototype.info = function(message) { | |
251 | this.log(Dygraph.INFO, message); | |
252 | } | |
253 | Dygraph.prototype.warn = function(message) { | |
254 | this.log(Dygraph.WARNING, message); | |
255 | } | |
256 | Dygraph.prototype.error = function(message) { | |
257 | this.log(Dygraph.ERROR, message); | |
258 | } | |
259 | ||
6a1aa64f DV |
260 | /** |
261 | * Returns the current rolling period, as set by the user or an option. | |
262 | * @return {Number} The number of days in the rolling window | |
263 | */ | |
285a6bda | 264 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 265 | return this.rollPeriod_; |
76171648 DV |
266 | }; |
267 | ||
599fb4ad DV |
268 | /** |
269 | * Returns the currently-visible x-range. This can be affected by zooming, | |
270 | * panning or a call to updateOptions. | |
271 | * Returns a two-element array: [left, right]. | |
272 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
273 | */ | |
274 | Dygraph.prototype.xAxisRange = function() { | |
275 | if (this.dateWindow_) return this.dateWindow_; | |
276 | ||
277 | // The entire chart is visible. | |
278 | var left = this.rawData_[0][0]; | |
279 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
280 | return [left, right]; | |
281 | }; | |
282 | ||
3230c662 DV |
283 | /** |
284 | * Returns the currently-visible y-range. This can be affected by zooming, | |
285 | * panning or a call to updateOptions. | |
286 | * Returns a two-element array: [bottom, top]. | |
287 | */ | |
288 | Dygraph.prototype.yAxisRange = function() { | |
289 | return this.displayedYRange_; | |
290 | }; | |
291 | ||
292 | /** | |
293 | * Convert from data coordinates to canvas/div X/Y coordinates. | |
294 | * Returns a two-element array: [X, Y] | |
295 | */ | |
296 | Dygraph.prototype.toDomCoords = function(x, y) { | |
297 | var ret = [null, null]; | |
298 | var area = this.plotter_.area; | |
299 | if (x !== null) { | |
300 | var xRange = this.xAxisRange(); | |
301 | ret[0] = area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; | |
302 | } | |
303 | ||
304 | if (y !== null) { | |
305 | var yRange = this.yAxisRange(); | |
891ad846 | 306 | ret[1] = area.y + (yRange[1] - y) / (yRange[1] - yRange[0]) * area.h; |
3230c662 DV |
307 | } |
308 | ||
309 | return ret; | |
310 | }; | |
311 | ||
56623f3b | 312 | // TODO(danvk): use these functions throughout dygraphs. |
3230c662 DV |
313 | /** |
314 | * Convert from canvas/div coords to data coordinates. | |
315 | * Returns a two-element array: [X, Y] | |
316 | */ | |
317 | Dygraph.prototype.toDataCoords = function(x, y) { | |
318 | var ret = [null, null]; | |
319 | var area = this.plotter_.area; | |
320 | if (x !== null) { | |
321 | var xRange = this.xAxisRange(); | |
322 | ret[0] = xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); | |
323 | } | |
324 | ||
325 | if (y !== null) { | |
326 | var yRange = this.yAxisRange(); | |
327 | ret[1] = yRange[0] + (area.h - y) / area.h * (yRange[1] - yRange[0]); | |
328 | } | |
329 | ||
330 | return ret; | |
331 | }; | |
332 | ||
76171648 DV |
333 | Dygraph.addEvent = function(el, evt, fn) { |
334 | var normed_fn = function(e) { | |
335 | if (!e) var e = window.event; | |
336 | fn(e); | |
337 | }; | |
338 | if (window.addEventListener) { // Mozilla, Netscape, Firefox | |
339 | el.addEventListener(evt, normed_fn, false); | |
340 | } else { // IE | |
341 | el.attachEvent('on' + evt, normed_fn); | |
342 | } | |
343 | }; | |
6a1aa64f | 344 | |
4c47502d DV |
345 | Dygraph.clipCanvas_ = function(cnv, clip) { |
346 | var ctx = cnv.getContext("2d"); | |
347 | ctx.beginPath(); | |
348 | ctx.rect(clip.left, clip.top, clip.width, clip.height); | |
349 | ctx.clip(); | |
350 | }; | |
351 | ||
6a1aa64f | 352 | /** |
285a6bda | 353 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 354 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 355 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
356 | * @private |
357 | */ | |
285a6bda | 358 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
359 | // Create the all-enclosing graph div |
360 | var enclosing = this.maindiv_; | |
361 | ||
b0c3b730 DV |
362 | this.graphDiv = document.createElement("div"); |
363 | this.graphDiv.style.width = this.width_ + "px"; | |
364 | this.graphDiv.style.height = this.height_ + "px"; | |
365 | enclosing.appendChild(this.graphDiv); | |
366 | ||
4c47502d DV |
367 | var clip = { |
368 | top: 0, | |
369 | left: this.attr_("yAxisLabelWidth") + 2 * this.attr_("axisTickSize") | |
370 | }; | |
371 | clip.width = this.width_ - clip.left - this.attr_("rightGap"); | |
372 | clip.height = this.height_ - this.attr_("axisLabelFontSize") | |
373 | - 2 * this.attr_("axisTickSize"); | |
374 | this.clippingArea_ = clip; | |
375 | ||
b0c3b730 | 376 | // Create the canvas for interactive parts of the chart. |
f8cfec73 | 377 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 DV |
378 | this.canvas_.style.position = "absolute"; |
379 | this.canvas_.width = this.width_; | |
380 | this.canvas_.height = this.height_; | |
f8cfec73 DV |
381 | this.canvas_.style.width = this.width_ + "px"; // for IE |
382 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
b0c3b730 DV |
383 | this.graphDiv.appendChild(this.canvas_); |
384 | ||
385 | // ... and for static parts of the chart. | |
6a1aa64f | 386 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
76171648 | 387 | |
4c47502d DV |
388 | // Make sure we don't overdraw. |
389 | Dygraph.clipCanvas_(this.hidden_, this.clippingArea_); | |
390 | Dygraph.clipCanvas_(this.canvas_, this.clippingArea_); | |
391 | ||
76171648 DV |
392 | var dygraph = this; |
393 | Dygraph.addEvent(this.hidden_, 'mousemove', function(e) { | |
394 | dygraph.mouseMove_(e); | |
395 | }); | |
396 | Dygraph.addEvent(this.hidden_, 'mouseout', function(e) { | |
397 | dygraph.mouseOut_(e); | |
398 | }); | |
697e70b2 DV |
399 | |
400 | // Create the grapher | |
401 | // TODO(danvk): why does the Layout need its own set of options? | |
402 | this.layoutOptions_ = { 'xOriginIsZero': false }; | |
403 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
404 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
405 | Dygraph.update(this.layoutOptions_, { | |
406 | 'errorBars': (this.attr_("errorBars") || this.attr_("customBars")) }); | |
407 | ||
408 | this.layout_ = new DygraphLayout(this, this.layoutOptions_); | |
409 | ||
410 | // TODO(danvk): why does the Renderer need its own set of options? | |
411 | this.renderOptions_ = { colorScheme: this.colors_, | |
412 | strokeColor: null, | |
413 | axisLineWidth: Dygraph.AXIS_LINE_WIDTH }; | |
414 | Dygraph.update(this.renderOptions_, this.attrs_); | |
415 | Dygraph.update(this.renderOptions_, this.user_attrs_); | |
416 | this.plotter_ = new DygraphCanvasRenderer(this, | |
417 | this.hidden_, this.layout_, | |
418 | this.renderOptions_); | |
419 | ||
420 | this.createStatusMessage_(); | |
421 | this.createRollInterface_(); | |
422 | this.createDragInterface_(); | |
4cfcc38c DV |
423 | }; |
424 | ||
425 | /** | |
426 | * Detach DOM elements in the dygraph and null out all data references. | |
427 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
428 | * usage. See, e.g., the tests/perf.html example. | |
429 | */ | |
430 | Dygraph.prototype.destroy = function() { | |
431 | var removeRecursive = function(node) { | |
432 | while (node.hasChildNodes()) { | |
433 | removeRecursive(node.firstChild); | |
434 | node.removeChild(node.firstChild); | |
435 | } | |
436 | }; | |
437 | removeRecursive(this.maindiv_); | |
438 | ||
439 | var nullOut = function(obj) { | |
440 | for (var n in obj) { | |
441 | if (typeof(obj[n]) === 'object') { | |
442 | obj[n] = null; | |
443 | } | |
444 | } | |
445 | }; | |
446 | ||
447 | // These may not all be necessary, but it can't hurt... | |
448 | nullOut(this.layout_); | |
449 | nullOut(this.plotter_); | |
450 | nullOut(this); | |
451 | }; | |
6a1aa64f DV |
452 | |
453 | /** | |
454 | * Creates the canvas containing the PlotKit graph. Only plotkit ever draws on | |
285a6bda | 455 | * this particular canvas. All Dygraph work is done on this.canvas_. |
8846615a | 456 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
457 | * @return {Object} The newly-created canvas |
458 | * @private | |
459 | */ | |
285a6bda | 460 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 | 461 | var h = Dygraph.createCanvas(); |
6a1aa64f | 462 | h.style.position = "absolute"; |
9ac5e4ae DV |
463 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
464 | // some extra area to make it easier to zoom in on the far left and far | |
465 | // right. h needs to be precisely the plot area, so that clipping occurs. | |
6a1aa64f DV |
466 | h.style.top = canvas.style.top; |
467 | h.style.left = canvas.style.left; | |
468 | h.width = this.width_; | |
469 | h.height = this.height_; | |
f8cfec73 DV |
470 | h.style.width = this.width_ + "px"; // for IE |
471 | h.style.height = this.height_ + "px"; // for IE | |
b0c3b730 | 472 | this.graphDiv.appendChild(h); |
6a1aa64f DV |
473 | return h; |
474 | }; | |
475 | ||
f474c2a3 DV |
476 | // Taken from MochiKit.Color |
477 | Dygraph.hsvToRGB = function (hue, saturation, value) { | |
478 | var red; | |
479 | var green; | |
480 | var blue; | |
481 | if (saturation === 0) { | |
482 | red = value; | |
483 | green = value; | |
484 | blue = value; | |
485 | } else { | |
486 | var i = Math.floor(hue * 6); | |
487 | var f = (hue * 6) - i; | |
488 | var p = value * (1 - saturation); | |
489 | var q = value * (1 - (saturation * f)); | |
490 | var t = value * (1 - (saturation * (1 - f))); | |
491 | switch (i) { | |
492 | case 1: red = q; green = value; blue = p; break; | |
493 | case 2: red = p; green = value; blue = t; break; | |
494 | case 3: red = p; green = q; blue = value; break; | |
495 | case 4: red = t; green = p; blue = value; break; | |
496 | case 5: red = value; green = p; blue = q; break; | |
497 | case 6: // fall through | |
498 | case 0: red = value; green = t; blue = p; break; | |
499 | } | |
500 | } | |
501 | red = Math.floor(255 * red + 0.5); | |
502 | green = Math.floor(255 * green + 0.5); | |
503 | blue = Math.floor(255 * blue + 0.5); | |
504 | return 'rgb(' + red + ',' + green + ',' + blue + ')'; | |
505 | }; | |
506 | ||
507 | ||
6a1aa64f DV |
508 | /** |
509 | * Generate a set of distinct colors for the data series. This is done with a | |
510 | * color wheel. Saturation/Value are customizable, and the hue is | |
511 | * equally-spaced around the color wheel. If a custom set of colors is | |
512 | * specified, that is used instead. | |
6a1aa64f DV |
513 | * @private |
514 | */ | |
285a6bda DV |
515 | Dygraph.prototype.setColors_ = function() { |
516 | // TODO(danvk): compute this directly into this.attrs_['colorScheme'] and do | |
517 | // away with this.renderOptions_. | |
518 | var num = this.attr_("labels").length - 1; | |
6a1aa64f | 519 | this.colors_ = []; |
285a6bda DV |
520 | var colors = this.attr_('colors'); |
521 | if (!colors) { | |
522 | var sat = this.attr_('colorSaturation') || 1.0; | |
523 | var val = this.attr_('colorValue') || 0.5; | |
6a1aa64f | 524 | for (var i = 1; i <= num; i++) { |
ec1959eb | 525 | if (!this.visibility()[i-1]) continue; |
43af96e7 NK |
526 | // alternate colors for high contrast. |
527 | var idx = i - parseInt(i % 2 ? i / 2 : (i - num)/2, 10); | |
528 | var hue = (1.0 * idx/ (1 + num)); | |
529 | this.colors_.push(Dygraph.hsvToRGB(hue, sat, val)); | |
6a1aa64f DV |
530 | } |
531 | } else { | |
532 | for (var i = 0; i < num; i++) { | |
ec1959eb | 533 | if (!this.visibility()[i]) continue; |
285a6bda | 534 | var colorStr = colors[i % colors.length]; |
f474c2a3 | 535 | this.colors_.push(colorStr); |
6a1aa64f DV |
536 | } |
537 | } | |
285a6bda | 538 | |
c21d2c2d | 539 | // TODO(danvk): update this w/r/t/ the new options system. |
285a6bda | 540 | this.renderOptions_.colorScheme = this.colors_; |
fc80a396 DV |
541 | Dygraph.update(this.plotter_.options, this.renderOptions_); |
542 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
543 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
6a1aa64f DV |
544 | } |
545 | ||
43af96e7 NK |
546 | /** |
547 | * Return the list of colors. This is either the list of colors passed in the | |
548 | * attributes, or the autogenerated list of rgb(r,g,b) strings. | |
549 | * @return {Array<string>} The list of colors. | |
550 | */ | |
551 | Dygraph.prototype.getColors = function() { | |
552 | return this.colors_; | |
553 | }; | |
554 | ||
5e60386d DV |
555 | // The following functions are from quirksmode.org with a modification for Safari from |
556 | // http://blog.firetree.net/2005/07/04/javascript-find-position/ | |
3df0ccf0 DV |
557 | // http://www.quirksmode.org/js/findpos.html |
558 | Dygraph.findPosX = function(obj) { | |
559 | var curleft = 0; | |
5e60386d DV |
560 | if(obj.offsetParent) |
561 | while(1) | |
562 | { | |
3df0ccf0 | 563 | curleft += obj.offsetLeft; |
5e60386d DV |
564 | if(!obj.offsetParent) |
565 | break; | |
3df0ccf0 DV |
566 | obj = obj.offsetParent; |
567 | } | |
5e60386d | 568 | else if(obj.x) |
3df0ccf0 DV |
569 | curleft += obj.x; |
570 | return curleft; | |
571 | }; | |
c21d2c2d | 572 | |
3df0ccf0 DV |
573 | Dygraph.findPosY = function(obj) { |
574 | var curtop = 0; | |
5e60386d DV |
575 | if(obj.offsetParent) |
576 | while(1) | |
577 | { | |
3df0ccf0 | 578 | curtop += obj.offsetTop; |
5e60386d DV |
579 | if(!obj.offsetParent) |
580 | break; | |
3df0ccf0 DV |
581 | obj = obj.offsetParent; |
582 | } | |
5e60386d | 583 | else if(obj.y) |
3df0ccf0 DV |
584 | curtop += obj.y; |
585 | return curtop; | |
586 | }; | |
587 | ||
5e60386d | 588 | |
71a11a8e | 589 | |
6a1aa64f DV |
590 | /** |
591 | * Create the div that contains information on the selected point(s) | |
592 | * This goes in the top right of the canvas, unless an external div has already | |
593 | * been specified. | |
594 | * @private | |
595 | */ | |
285a6bda DV |
596 | Dygraph.prototype.createStatusMessage_ = function(){ |
597 | if (!this.attr_("labelsDiv")) { | |
598 | var divWidth = this.attr_('labelsDivWidth'); | |
b0c3b730 | 599 | var messagestyle = { |
6a1aa64f DV |
600 | "position": "absolute", |
601 | "fontSize": "14px", | |
602 | "zIndex": 10, | |
603 | "width": divWidth + "px", | |
604 | "top": "0px", | |
8846615a | 605 | "left": (this.width_ - divWidth - 2) + "px", |
6a1aa64f DV |
606 | "background": "white", |
607 | "textAlign": "left", | |
b0c3b730 | 608 | "overflow": "hidden"}; |
fc80a396 | 609 | Dygraph.update(messagestyle, this.attr_('labelsDivStyles')); |
b0c3b730 DV |
610 | var div = document.createElement("div"); |
611 | for (var name in messagestyle) { | |
85b99f0b DV |
612 | if (messagestyle.hasOwnProperty(name)) { |
613 | div.style[name] = messagestyle[name]; | |
614 | } | |
b0c3b730 DV |
615 | } |
616 | this.graphDiv.appendChild(div); | |
285a6bda | 617 | this.attrs_.labelsDiv = div; |
6a1aa64f DV |
618 | } |
619 | }; | |
620 | ||
621 | /** | |
622 | * Create the text box to adjust the averaging period | |
623 | * @return {Object} The newly-created text box | |
624 | * @private | |
625 | */ | |
285a6bda | 626 | Dygraph.prototype.createRollInterface_ = function() { |
285a6bda | 627 | var display = this.attr_('showRoller') ? "block" : "none"; |
b0c3b730 DV |
628 | var textAttr = { "position": "absolute", |
629 | "zIndex": 10, | |
630 | "top": (this.plotter_.area.h - 25) + "px", | |
631 | "left": (this.plotter_.area.x + 1) + "px", | |
632 | "display": display | |
6a1aa64f | 633 | }; |
b0c3b730 DV |
634 | var roller = document.createElement("input"); |
635 | roller.type = "text"; | |
636 | roller.size = "2"; | |
637 | roller.value = this.rollPeriod_; | |
638 | for (var name in textAttr) { | |
85b99f0b DV |
639 | if (textAttr.hasOwnProperty(name)) { |
640 | roller.style[name] = textAttr[name]; | |
641 | } | |
b0c3b730 DV |
642 | } |
643 | ||
6a1aa64f | 644 | var pa = this.graphDiv; |
b0c3b730 | 645 | pa.appendChild(roller); |
76171648 DV |
646 | var dygraph = this; |
647 | roller.onchange = function() { dygraph.adjustRoll(roller.value); }; | |
6a1aa64f | 648 | return roller; |
76171648 DV |
649 | }; |
650 | ||
651 | // These functions are taken from MochiKit.Signal | |
652 | Dygraph.pageX = function(e) { | |
653 | if (e.pageX) { | |
654 | return (!e.pageX || e.pageX < 0) ? 0 : e.pageX; | |
655 | } else { | |
656 | var de = document; | |
657 | var b = document.body; | |
658 | return e.clientX + | |
659 | (de.scrollLeft || b.scrollLeft) - | |
660 | (de.clientLeft || 0); | |
661 | } | |
662 | }; | |
663 | ||
664 | Dygraph.pageY = function(e) { | |
665 | if (e.pageY) { | |
666 | return (!e.pageY || e.pageY < 0) ? 0 : e.pageY; | |
667 | } else { | |
668 | var de = document; | |
669 | var b = document.body; | |
670 | return e.clientY + | |
671 | (de.scrollTop || b.scrollTop) - | |
672 | (de.clientTop || 0); | |
673 | } | |
674 | }; | |
6a1aa64f DV |
675 | |
676 | /** | |
677 | * Set up all the mouse handlers needed to capture dragging behavior for zoom | |
27385109 | 678 | * events. |
6a1aa64f DV |
679 | * @private |
680 | */ | |
285a6bda | 681 | Dygraph.prototype.createDragInterface_ = function() { |
6a1aa64f DV |
682 | var self = this; |
683 | ||
684 | // Tracks whether the mouse is down right now | |
bce01b0f | 685 | var isZooming = false; |
c776c216 | 686 | var isPanning = false; |
6a1aa64f DV |
687 | var dragStartX = null; |
688 | var dragStartY = null; | |
689 | var dragEndX = null; | |
690 | var dragEndY = null; | |
691 | var prevEndX = null; | |
bce01b0f DV |
692 | var draggingDate = null; |
693 | var dateRange = null; | |
6a1aa64f DV |
694 | |
695 | // Utility function to convert page-wide coordinates to canvas coords | |
67e650dc DV |
696 | var px = 0; |
697 | var py = 0; | |
76171648 DV |
698 | var getX = function(e) { return Dygraph.pageX(e) - px }; |
699 | var getY = function(e) { return Dygraph.pageX(e) - py }; | |
6a1aa64f DV |
700 | |
701 | // Draw zoom rectangles when the mouse is down and the user moves around | |
76171648 | 702 | Dygraph.addEvent(this.hidden_, 'mousemove', function(event) { |
bce01b0f | 703 | if (isZooming) { |
6a1aa64f DV |
704 | dragEndX = getX(event); |
705 | dragEndY = getY(event); | |
706 | ||
707 | self.drawZoomRect_(dragStartX, dragEndX, prevEndX); | |
708 | prevEndX = dragEndX; | |
bce01b0f DV |
709 | } else if (isPanning) { |
710 | dragEndX = getX(event); | |
711 | dragEndY = getY(event); | |
712 | ||
713 | // Want to have it so that: | |
714 | // 1. draggingDate appears at dragEndX | |
715 | // 2. daterange = (dateWindow_[1] - dateWindow_[0]) is unaltered. | |
716 | ||
717 | self.dateWindow_[0] = draggingDate - (dragEndX / self.width_) * dateRange; | |
718 | self.dateWindow_[1] = self.dateWindow_[0] + dateRange; | |
719 | self.drawGraph_(self.rawData_); | |
6a1aa64f DV |
720 | } |
721 | }); | |
722 | ||
723 | // Track the beginning of drag events | |
76171648 | 724 | Dygraph.addEvent(this.hidden_, 'mousedown', function(event) { |
3df0ccf0 DV |
725 | px = Dygraph.findPosX(self.canvas_); |
726 | py = Dygraph.findPosY(self.canvas_); | |
6a1aa64f DV |
727 | dragStartX = getX(event); |
728 | dragStartY = getY(event); | |
bce01b0f | 729 | |
2dab69c3 | 730 | if (event.altKey || event.shiftKey) { |
d12999d3 | 731 | if (!self.dateWindow_) return; // have to be zoomed in to pan. |
bce01b0f DV |
732 | isPanning = true; |
733 | dateRange = self.dateWindow_[1] - self.dateWindow_[0]; | |
d12999d3 DV |
734 | draggingDate = (dragStartX / self.width_) * dateRange + |
735 | self.dateWindow_[0]; | |
bce01b0f DV |
736 | } else { |
737 | isZooming = true; | |
738 | } | |
6a1aa64f DV |
739 | }); |
740 | ||
741 | // If the user releases the mouse button during a drag, but not over the | |
742 | // canvas, then it doesn't count as a zooming action. | |
76171648 | 743 | Dygraph.addEvent(document, 'mouseup', function(event) { |
bce01b0f DV |
744 | if (isZooming || isPanning) { |
745 | isZooming = false; | |
6a1aa64f DV |
746 | dragStartX = null; |
747 | dragStartY = null; | |
748 | } | |
bce01b0f DV |
749 | |
750 | if (isPanning) { | |
751 | isPanning = false; | |
752 | draggingDate = null; | |
753 | dateRange = null; | |
754 | } | |
6a1aa64f DV |
755 | }); |
756 | ||
757 | // Temporarily cancel the dragging event when the mouse leaves the graph | |
76171648 | 758 | Dygraph.addEvent(this.hidden_, 'mouseout', function(event) { |
bce01b0f | 759 | if (isZooming) { |
6a1aa64f DV |
760 | dragEndX = null; |
761 | dragEndY = null; | |
762 | } | |
763 | }); | |
764 | ||
765 | // If the mouse is released on the canvas during a drag event, then it's a | |
766 | // zoom. Only do the zoom if it's over a large enough area (>= 10 pixels) | |
76171648 | 767 | Dygraph.addEvent(this.hidden_, 'mouseup', function(event) { |
bce01b0f DV |
768 | if (isZooming) { |
769 | isZooming = false; | |
6a1aa64f DV |
770 | dragEndX = getX(event); |
771 | dragEndY = getY(event); | |
772 | var regionWidth = Math.abs(dragEndX - dragStartX); | |
773 | var regionHeight = Math.abs(dragEndY - dragStartY); | |
774 | ||
775 | if (regionWidth < 2 && regionHeight < 2 && | |
285a6bda | 776 | self.attr_('clickCallback') != null && |
6a1aa64f | 777 | self.lastx_ != undefined) { |
b258a3da DV |
778 | // TODO(danvk): pass along more info about the points. |
779 | self.attr_('clickCallback')(event, self.lastx_, self.selPoints_); | |
6a1aa64f DV |
780 | } |
781 | ||
782 | if (regionWidth >= 10) { | |
783 | self.doZoom_(Math.min(dragStartX, dragEndX), | |
784 | Math.max(dragStartX, dragEndX)); | |
785 | } else { | |
786 | self.canvas_.getContext("2d").clearRect(0, 0, | |
787 | self.canvas_.width, | |
788 | self.canvas_.height); | |
789 | } | |
790 | ||
791 | dragStartX = null; | |
792 | dragStartY = null; | |
793 | } | |
bce01b0f DV |
794 | |
795 | if (isPanning) { | |
796 | isPanning = false; | |
797 | draggingDate = null; | |
798 | dateRange = null; | |
799 | } | |
6a1aa64f DV |
800 | }); |
801 | ||
802 | // Double-clicking zooms back out | |
76171648 | 803 | Dygraph.addEvent(this.hidden_, 'dblclick', function(event) { |
b258a3da | 804 | if (self.dateWindow_ == null) return; |
6a1aa64f DV |
805 | self.dateWindow_ = null; |
806 | self.drawGraph_(self.rawData_); | |
807 | var minDate = self.rawData_[0][0]; | |
808 | var maxDate = self.rawData_[self.rawData_.length - 1][0]; | |
285a6bda DV |
809 | if (self.attr_("zoomCallback")) { |
810 | self.attr_("zoomCallback")(minDate, maxDate); | |
67e650dc | 811 | } |
6a1aa64f DV |
812 | }); |
813 | }; | |
814 | ||
815 | /** | |
816 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
817 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
818 | * avoid extra redrawing, but it's tricky to avoid interactions with the status | |
819 | * dots. | |
820 | * @param {Number} startX The X position where the drag started, in canvas | |
821 | * coordinates. | |
822 | * @param {Number} endX The current X position of the drag, in canvas coords. | |
823 | * @param {Number} prevEndX The value of endX on the previous call to this | |
824 | * function. Used to avoid excess redrawing | |
825 | * @private | |
826 | */ | |
285a6bda | 827 | Dygraph.prototype.drawZoomRect_ = function(startX, endX, prevEndX) { |
6a1aa64f DV |
828 | var ctx = this.canvas_.getContext("2d"); |
829 | ||
830 | // Clean up from the previous rect if necessary | |
831 | if (prevEndX) { | |
832 | ctx.clearRect(Math.min(startX, prevEndX), 0, | |
833 | Math.abs(startX - prevEndX), this.height_); | |
834 | } | |
835 | ||
836 | // Draw a light-grey rectangle to show the new viewing area | |
837 | if (endX && startX) { | |
838 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
839 | ctx.fillRect(Math.min(startX, endX), 0, | |
840 | Math.abs(endX - startX), this.height_); | |
841 | } | |
842 | }; | |
843 | ||
844 | /** | |
845 | * Zoom to something containing [lowX, highX]. These are pixel coordinates | |
846 | * in the canvas. The exact zoom window may be slightly larger if there are no | |
847 | * data points near lowX or highX. This function redraws the graph. | |
848 | * @param {Number} lowX The leftmost pixel value that should be visible. | |
849 | * @param {Number} highX The rightmost pixel value that should be visible. | |
850 | * @private | |
851 | */ | |
285a6bda | 852 | Dygraph.prototype.doZoom_ = function(lowX, highX) { |
6a1aa64f | 853 | // Find the earliest and latest dates contained in this canvasx range. |
56623f3b DV |
854 | var r = this.toDataCoords(lowX, null); |
855 | var minDate = r[0]; | |
856 | r = this.toDataCoords(highX, null); | |
857 | var maxDate = r[0]; | |
6a1aa64f DV |
858 | |
859 | this.dateWindow_ = [minDate, maxDate]; | |
860 | this.drawGraph_(this.rawData_); | |
285a6bda DV |
861 | if (this.attr_("zoomCallback")) { |
862 | this.attr_("zoomCallback")(minDate, maxDate); | |
67e650dc | 863 | } |
6a1aa64f DV |
864 | }; |
865 | ||
866 | /** | |
867 | * When the mouse moves in the canvas, display information about a nearby data | |
868 | * point and draw dots over those points in the data series. This function | |
869 | * takes care of cleanup of previously-drawn dots. | |
870 | * @param {Object} event The mousemove event from the browser. | |
871 | * @private | |
872 | */ | |
285a6bda | 873 | Dygraph.prototype.mouseMove_ = function(event) { |
76171648 | 874 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.hidden_); |
6a1aa64f DV |
875 | var points = this.layout_.points; |
876 | ||
877 | var lastx = -1; | |
878 | var lasty = -1; | |
879 | ||
880 | // Loop through all the points and find the date nearest to our current | |
881 | // location. | |
882 | var minDist = 1e+100; | |
883 | var idx = -1; | |
884 | for (var i = 0; i < points.length; i++) { | |
885 | var dist = Math.abs(points[i].canvasx - canvasx); | |
886 | if (dist > minDist) break; | |
887 | minDist = dist; | |
888 | idx = i; | |
889 | } | |
890 | if (idx >= 0) lastx = points[idx].xval; | |
891 | // Check that you can really highlight the last day's data | |
892 | if (canvasx > points[points.length-1].canvasx) | |
893 | lastx = points[points.length-1].xval; | |
894 | ||
895 | // Extract the points we've selected | |
b258a3da | 896 | this.selPoints_ = []; |
6a1aa64f DV |
897 | for (var i = 0; i < points.length; i++) { |
898 | if (points[i].xval == lastx) { | |
b258a3da | 899 | this.selPoints_.push(points[i]); |
6a1aa64f DV |
900 | } |
901 | } | |
902 | ||
b258a3da | 903 | if (this.attr_("highlightCallback")) { |
dd082dda DV |
904 | var px = this.lastHighlightCallbackX; |
905 | if (px !== null && lastx != px) { | |
344ba8c0 | 906 | // only fire if the selected point has changed. |
dd082dda | 907 | this.lastHighlightCallbackX = lastx; |
344ba8c0 DV |
908 | if (!this.attr_("stackedGraph")) { |
909 | this.attr_("highlightCallback")(event, lastx, this.selPoints_); | |
910 | } else { | |
71a11a8e | 911 | // "unstack" the points. |
344ba8c0 DV |
912 | var callbackPoints = this.selPoints_.map( |
913 | function(p) { return {xval: p.xval, yval: p.yval, name: p.name} }); | |
71a11a8e DV |
914 | var cumulative_sum = 0; |
915 | for (var j = callbackPoints.length - 1; j >= 0; j--) { | |
916 | callbackPoints[j].yval -= cumulative_sum; | |
917 | cumulative_sum += callbackPoints[j].yval; | |
918 | } | |
344ba8c0 | 919 | this.attr_("highlightCallback")(event, lastx, callbackPoints); |
43af96e7 | 920 | } |
dd082dda | 921 | } |
b258a3da DV |
922 | } |
923 | ||
239c712d NAG |
924 | // Save last x position for callbacks. |
925 | this.lastx_ = lastx; | |
926 | ||
927 | this.updateSelection_(); | |
928 | }; | |
929 | ||
930 | /** | |
931 | * Draw dots over the selectied points in the data series. This function | |
932 | * takes care of cleanup of previously-drawn dots. | |
933 | * @private | |
934 | */ | |
935 | Dygraph.prototype.updateSelection_ = function() { | |
6a1aa64f | 936 | // Clear the previously drawn vertical, if there is one |
285a6bda | 937 | var circleSize = this.attr_('highlightCircleSize'); |
6a1aa64f DV |
938 | var ctx = this.canvas_.getContext("2d"); |
939 | if (this.previousVerticalX_ >= 0) { | |
940 | var px = this.previousVerticalX_; | |
941 | ctx.clearRect(px - circleSize - 1, 0, 2 * circleSize + 2, this.height_); | |
942 | } | |
943 | ||
584ceeaa DV |
944 | var isOK = function(x) { return x && !isNaN(x); }; |
945 | ||
b258a3da DV |
946 | if (this.selPoints_.length > 0) { |
947 | var canvasx = this.selPoints_[0].canvasx; | |
6a1aa64f DV |
948 | |
949 | // Set the status message to indicate the selected point(s) | |
239c712d | 950 | var replace = this.attr_('xValueFormatter')(this.lastx_, this) + ":"; |
6a1aa64f | 951 | var clen = this.colors_.length; |
b258a3da DV |
952 | for (var i = 0; i < this.selPoints_.length; i++) { |
953 | if (!isOK(this.selPoints_[i].canvasy)) continue; | |
285a6bda | 954 | if (this.attr_("labelsSeparateLines")) { |
6a1aa64f DV |
955 | replace += "<br/>"; |
956 | } | |
b258a3da | 957 | var point = this.selPoints_[i]; |
f474c2a3 DV |
958 | var c = new RGBColor(this.colors_[i%clen]); |
959 | replace += " <b><font color='" + c.toHex() + "'>" | |
6a1aa64f DV |
960 | + point.name + "</font></b>:" |
961 | + this.round_(point.yval, 2); | |
962 | } | |
285a6bda | 963 | this.attr_("labelsDiv").innerHTML = replace; |
6a1aa64f | 964 | |
6a1aa64f | 965 | // Draw colored circles over the center of each selected point |
43af96e7 | 966 | ctx.save(); |
b258a3da DV |
967 | for (var i = 0; i < this.selPoints_.length; i++) { |
968 | if (!isOK(this.selPoints_[i%clen].canvasy)) continue; | |
6a1aa64f | 969 | ctx.beginPath(); |
f474c2a3 | 970 | ctx.fillStyle = this.colors_[i%clen]; |
b258a3da | 971 | ctx.arc(canvasx, this.selPoints_[i%clen].canvasy, circleSize, |
7bf6a9fe | 972 | 0, 2 * Math.PI, false); |
6a1aa64f DV |
973 | ctx.fill(); |
974 | } | |
975 | ctx.restore(); | |
976 | ||
977 | this.previousVerticalX_ = canvasx; | |
978 | } | |
979 | }; | |
980 | ||
981 | /** | |
239c712d NAG |
982 | * Set manually set selected dots, and display information about them |
983 | * @param int row number that should by highlighted | |
984 | * false value clears the selection | |
985 | * @public | |
986 | */ | |
987 | Dygraph.prototype.setSelection = function(row) { | |
988 | // Extract the points we've selected | |
989 | this.selPoints_ = []; | |
990 | var pos = 0; | |
991 | ||
992 | if (row !== false) { | |
993 | for (var i in this.layout_.datasets) { | |
994 | this.selPoints_.push(this.layout_.points[pos+row]); | |
995 | pos += this.layout_.datasets[i].length; | |
996 | } | |
997 | ||
998 | this.lastx_ = this.selPoints_[0].xval; | |
999 | this.updateSelection_(); | |
1000 | } else { | |
1001 | this.lastx_ = -1; | |
1002 | this.clearSelection(); | |
1003 | } | |
1004 | ||
1005 | }; | |
1006 | ||
1007 | /** | |
6a1aa64f DV |
1008 | * The mouse has left the canvas. Clear out whatever artifacts remain |
1009 | * @param {Object} event the mouseout event from the browser. | |
1010 | * @private | |
1011 | */ | |
285a6bda | 1012 | Dygraph.prototype.mouseOut_ = function(event) { |
43af96e7 | 1013 | if (this.attr_("hideOverlayOnMouseOut")) { |
239c712d | 1014 | this.clearSelection(); |
43af96e7 | 1015 | } |
6a1aa64f DV |
1016 | }; |
1017 | ||
239c712d NAG |
1018 | /** |
1019 | * Remove all selection from the canvas | |
1020 | * @public | |
1021 | */ | |
1022 | Dygraph.prototype.clearSelection = function() { | |
1023 | // Get rid of the overlay data | |
1024 | var ctx = this.canvas_.getContext("2d"); | |
1025 | ctx.clearRect(0, 0, this.width_, this.height_); | |
1026 | this.attr_("labelsDiv").innerHTML = ""; | |
1027 | this.selPoints_ = []; | |
1028 | this.lastx_ = -1; | |
1029 | } | |
1030 | ||
103b7292 NAG |
1031 | /** |
1032 | * Returns the number of the currently selected row | |
1033 | * @return int row number, of -1 if nothing is selected | |
1034 | * @public | |
1035 | */ | |
1036 | Dygraph.prototype.getSelection = function() { | |
1037 | if (!this.selPoints_ || this.selPoints_.length < 1) { | |
1038 | return -1; | |
1039 | } | |
1040 | ||
1041 | for (var row=0; row<this.layout_.points.length; row++ ) { | |
1042 | if (this.layout_.points[row].x == this.selPoints_[0].x) { | |
1043 | return row; | |
1044 | } | |
1045 | } | |
1046 | return -1; | |
1047 | } | |
1048 | ||
285a6bda | 1049 | Dygraph.zeropad = function(x) { |
32988383 DV |
1050 | if (x < 10) return "0" + x; else return "" + x; |
1051 | } | |
1052 | ||
6a1aa64f | 1053 | /** |
6b8e33dd DV |
1054 | * Return a string version of the hours, minutes and seconds portion of a date. |
1055 | * @param {Number} date The JavaScript date (ms since epoch) | |
1056 | * @return {String} A time of the form "HH:MM:SS" | |
1057 | * @private | |
1058 | */ | |
285a6bda DV |
1059 | Dygraph.prototype.hmsString_ = function(date) { |
1060 | var zeropad = Dygraph.zeropad; | |
6b8e33dd DV |
1061 | var d = new Date(date); |
1062 | if (d.getSeconds()) { | |
1063 | return zeropad(d.getHours()) + ":" + | |
1064 | zeropad(d.getMinutes()) + ":" + | |
1065 | zeropad(d.getSeconds()); | |
6b8e33dd | 1066 | } else { |
054531ca | 1067 | return zeropad(d.getHours()) + ":" + zeropad(d.getMinutes()); |
6b8e33dd DV |
1068 | } |
1069 | } | |
1070 | ||
1071 | /** | |
6a1aa64f DV |
1072 | * Convert a JS date (millis since epoch) to YYYY/MM/DD |
1073 | * @param {Number} date The JavaScript date (ms since epoch) | |
1074 | * @return {String} A date of the form "YYYY/MM/DD" | |
1075 | * @private | |
285a6bda | 1076 | * TODO(danvk): why is this part of the prototype? |
6a1aa64f | 1077 | */ |
285a6bda DV |
1078 | Dygraph.dateString_ = function(date, self) { |
1079 | var zeropad = Dygraph.zeropad; | |
6a1aa64f DV |
1080 | var d = new Date(date); |
1081 | ||
1082 | // Get the year: | |
1083 | var year = "" + d.getFullYear(); | |
1084 | // Get a 0 padded month string | |
6b8e33dd | 1085 | var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh |
6a1aa64f | 1086 | // Get a 0 padded day string |
6b8e33dd | 1087 | var day = zeropad(d.getDate()); |
6a1aa64f | 1088 | |
6b8e33dd DV |
1089 | var ret = ""; |
1090 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); | |
285a6bda | 1091 | if (frac) ret = " " + self.hmsString_(date); |
6b8e33dd DV |
1092 | |
1093 | return year + "/" + month + "/" + day + ret; | |
6a1aa64f DV |
1094 | }; |
1095 | ||
1096 | /** | |
1097 | * Round a number to the specified number of digits past the decimal point. | |
1098 | * @param {Number} num The number to round | |
1099 | * @param {Number} places The number of decimals to which to round | |
1100 | * @return {Number} The rounded number | |
1101 | * @private | |
1102 | */ | |
285a6bda | 1103 | Dygraph.prototype.round_ = function(num, places) { |
6a1aa64f DV |
1104 | var shift = Math.pow(10, places); |
1105 | return Math.round(num * shift)/shift; | |
1106 | }; | |
1107 | ||
1108 | /** | |
1109 | * Fires when there's data available to be graphed. | |
1110 | * @param {String} data Raw CSV data to be plotted | |
1111 | * @private | |
1112 | */ | |
285a6bda | 1113 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f DV |
1114 | this.rawData_ = this.parseCSV_(data); |
1115 | this.drawGraph_(this.rawData_); | |
1116 | }; | |
1117 | ||
285a6bda | 1118 | Dygraph.prototype.months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", |
8846615a | 1119 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]; |
285a6bda | 1120 | Dygraph.prototype.quarters = ["Jan", "Apr", "Jul", "Oct"]; |
6a1aa64f DV |
1121 | |
1122 | /** | |
1123 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
1124 | * @private | |
1125 | */ | |
285a6bda | 1126 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f DV |
1127 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
1128 | var startDate, endDate; | |
1129 | if (this.dateWindow_) { | |
1130 | startDate = this.dateWindow_[0]; | |
1131 | endDate = this.dateWindow_[1]; | |
1132 | } else { | |
1133 | startDate = this.rawData_[0][0]; | |
1134 | endDate = this.rawData_[this.rawData_.length - 1][0]; | |
1135 | } | |
1136 | ||
285a6bda | 1137 | var xTicks = this.attr_('xTicker')(startDate, endDate, this); |
6a1aa64f | 1138 | this.layout_.updateOptions({xTicks: xTicks}); |
32988383 DV |
1139 | }; |
1140 | ||
1141 | // Time granularity enumeration | |
285a6bda | 1142 | Dygraph.SECONDLY = 0; |
20a41c17 DV |
1143 | Dygraph.TWO_SECONDLY = 1; |
1144 | Dygraph.FIVE_SECONDLY = 2; | |
1145 | Dygraph.TEN_SECONDLY = 3; | |
1146 | Dygraph.THIRTY_SECONDLY = 4; | |
1147 | Dygraph.MINUTELY = 5; | |
1148 | Dygraph.TWO_MINUTELY = 6; | |
1149 | Dygraph.FIVE_MINUTELY = 7; | |
1150 | Dygraph.TEN_MINUTELY = 8; | |
1151 | Dygraph.THIRTY_MINUTELY = 9; | |
1152 | Dygraph.HOURLY = 10; | |
1153 | Dygraph.TWO_HOURLY = 11; | |
1154 | Dygraph.SIX_HOURLY = 12; | |
1155 | Dygraph.DAILY = 13; | |
1156 | Dygraph.WEEKLY = 14; | |
1157 | Dygraph.MONTHLY = 15; | |
1158 | Dygraph.QUARTERLY = 16; | |
1159 | Dygraph.BIANNUAL = 17; | |
1160 | Dygraph.ANNUAL = 18; | |
1161 | Dygraph.DECADAL = 19; | |
1162 | Dygraph.NUM_GRANULARITIES = 20; | |
285a6bda DV |
1163 | |
1164 | Dygraph.SHORT_SPACINGS = []; | |
1165 | Dygraph.SHORT_SPACINGS[Dygraph.SECONDLY] = 1000 * 1; | |
20a41c17 DV |
1166 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_SECONDLY] = 1000 * 2; |
1167 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_SECONDLY] = 1000 * 5; | |
285a6bda DV |
1168 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_SECONDLY] = 1000 * 10; |
1169 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_SECONDLY] = 1000 * 30; | |
1170 | Dygraph.SHORT_SPACINGS[Dygraph.MINUTELY] = 1000 * 60; | |
20a41c17 DV |
1171 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_MINUTELY] = 1000 * 60 * 2; |
1172 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_MINUTELY] = 1000 * 60 * 5; | |
285a6bda DV |
1173 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_MINUTELY] = 1000 * 60 * 10; |
1174 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_MINUTELY] = 1000 * 60 * 30; | |
1175 | Dygraph.SHORT_SPACINGS[Dygraph.HOURLY] = 1000 * 3600; | |
20a41c17 | 1176 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_HOURLY] = 1000 * 3600 * 2; |
805d5519 | 1177 | Dygraph.SHORT_SPACINGS[Dygraph.SIX_HOURLY] = 1000 * 3600 * 6; |
285a6bda DV |
1178 | Dygraph.SHORT_SPACINGS[Dygraph.DAILY] = 1000 * 86400; |
1179 | Dygraph.SHORT_SPACINGS[Dygraph.WEEKLY] = 1000 * 604800; | |
32988383 DV |
1180 | |
1181 | // NumXTicks() | |
1182 | // | |
1183 | // If we used this time granularity, how many ticks would there be? | |
1184 | // This is only an approximation, but it's generally good enough. | |
1185 | // | |
285a6bda DV |
1186 | Dygraph.prototype.NumXTicks = function(start_time, end_time, granularity) { |
1187 | if (granularity < Dygraph.MONTHLY) { | |
32988383 | 1188 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1189 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
32988383 DV |
1190 | return Math.floor(0.5 + 1.0 * (end_time - start_time) / spacing); |
1191 | } else { | |
1192 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1193 | var num_months = 12; | |
285a6bda DV |
1194 | if (granularity == Dygraph.QUARTERLY) num_months = 3; |
1195 | if (granularity == Dygraph.BIANNUAL) num_months = 2; | |
1196 | if (granularity == Dygraph.ANNUAL) num_months = 1; | |
1197 | if (granularity == Dygraph.DECADAL) { num_months = 1; year_mod = 10; } | |
32988383 DV |
1198 | |
1199 | var msInYear = 365.2524 * 24 * 3600 * 1000; | |
1200 | var num_years = 1.0 * (end_time - start_time) / msInYear; | |
1201 | return Math.floor(0.5 + 1.0 * num_years * num_months / year_mod); | |
1202 | } | |
1203 | }; | |
1204 | ||
1205 | // GetXAxis() | |
1206 | // | |
1207 | // Construct an x-axis of nicely-formatted times on meaningful boundaries | |
1208 | // (e.g. 'Jan 09' rather than 'Jan 22, 2009'). | |
1209 | // | |
1210 | // Returns an array containing {v: millis, label: label} dictionaries. | |
1211 | // | |
285a6bda | 1212 | Dygraph.prototype.GetXAxis = function(start_time, end_time, granularity) { |
32988383 | 1213 | var ticks = []; |
285a6bda | 1214 | if (granularity < Dygraph.MONTHLY) { |
32988383 | 1215 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1216 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
3d29302c | 1217 | var format = '%d%b'; // e.g. "1Jan" |
076c9622 DV |
1218 | |
1219 | // Find a time less than start_time which occurs on a "nice" time boundary | |
1220 | // for this granularity. | |
1221 | var g = spacing / 1000; | |
076c9622 DV |
1222 | var d = new Date(start_time); |
1223 | if (g <= 60) { // seconds | |
1224 | var x = d.getSeconds(); d.setSeconds(x - x % g); | |
1225 | } else { | |
1226 | d.setSeconds(0); | |
1227 | g /= 60; | |
1228 | if (g <= 60) { // minutes | |
1229 | var x = d.getMinutes(); d.setMinutes(x - x % g); | |
1230 | } else { | |
1231 | d.setMinutes(0); | |
1232 | g /= 60; | |
1233 | ||
1234 | if (g <= 24) { // days | |
1235 | var x = d.getHours(); d.setHours(x - x % g); | |
1236 | } else { | |
1237 | d.setHours(0); | |
1238 | g /= 24; | |
1239 | ||
1240 | if (g == 7) { // one week | |
20a41c17 | 1241 | d.setDate(d.getDate() - d.getDay()); |
076c9622 DV |
1242 | } |
1243 | } | |
1244 | } | |
328bb812 | 1245 | } |
076c9622 DV |
1246 | start_time = d.getTime(); |
1247 | ||
32988383 DV |
1248 | for (var t = start_time; t <= end_time; t += spacing) { |
1249 | var d = new Date(t); | |
1250 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); | |
285a6bda | 1251 | if (frac == 0 || granularity >= Dygraph.DAILY) { |
32988383 DV |
1252 | // the extra hour covers DST problems. |
1253 | ticks.push({ v:t, label: new Date(t + 3600*1000).strftime(format) }); | |
1254 | } else { | |
1255 | ticks.push({ v:t, label: this.hmsString_(t) }); | |
1256 | } | |
1257 | } | |
1258 | } else { | |
1259 | // Display a tick mark on the first of a set of months of each year. | |
1260 | // Years get a tick mark iff y % year_mod == 0. This is useful for | |
1261 | // displaying a tick mark once every 10 years, say, on long time scales. | |
1262 | var months; | |
1263 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1264 | ||
285a6bda | 1265 | if (granularity == Dygraph.MONTHLY) { |
32988383 | 1266 | months = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ]; |
285a6bda | 1267 | } else if (granularity == Dygraph.QUARTERLY) { |
32988383 | 1268 | months = [ 0, 3, 6, 9 ]; |
285a6bda | 1269 | } else if (granularity == Dygraph.BIANNUAL) { |
32988383 | 1270 | months = [ 0, 6 ]; |
285a6bda | 1271 | } else if (granularity == Dygraph.ANNUAL) { |
32988383 | 1272 | months = [ 0 ]; |
285a6bda | 1273 | } else if (granularity == Dygraph.DECADAL) { |
32988383 DV |
1274 | months = [ 0 ]; |
1275 | year_mod = 10; | |
1276 | } | |
1277 | ||
1278 | var start_year = new Date(start_time).getFullYear(); | |
1279 | var end_year = new Date(end_time).getFullYear(); | |
285a6bda | 1280 | var zeropad = Dygraph.zeropad; |
32988383 DV |
1281 | for (var i = start_year; i <= end_year; i++) { |
1282 | if (i % year_mod != 0) continue; | |
1283 | for (var j = 0; j < months.length; j++) { | |
1284 | var date_str = i + "/" + zeropad(1 + months[j]) + "/01"; | |
1285 | var t = Date.parse(date_str); | |
1286 | if (t < start_time || t > end_time) continue; | |
1287 | ticks.push({ v:t, label: new Date(t).strftime('%b %y') }); | |
1288 | } | |
1289 | } | |
1290 | } | |
1291 | ||
1292 | return ticks; | |
1293 | }; | |
1294 | ||
6a1aa64f DV |
1295 | |
1296 | /** | |
1297 | * Add ticks to the x-axis based on a date range. | |
1298 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1299 | * @param {Number} endDate End of the date window (millis since epoch) | |
1300 | * @return {Array.<Object>} Array of {label, value} tuples. | |
1301 | * @public | |
1302 | */ | |
285a6bda | 1303 | Dygraph.dateTicker = function(startDate, endDate, self) { |
32988383 | 1304 | var chosen = -1; |
285a6bda DV |
1305 | for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) { |
1306 | var num_ticks = self.NumXTicks(startDate, endDate, i); | |
1307 | if (self.width_ / num_ticks >= self.attr_('pixelsPerXLabel')) { | |
32988383 DV |
1308 | chosen = i; |
1309 | break; | |
2769de62 | 1310 | } |
6a1aa64f DV |
1311 | } |
1312 | ||
32988383 | 1313 | if (chosen >= 0) { |
285a6bda | 1314 | return self.GetXAxis(startDate, endDate, chosen); |
6a1aa64f | 1315 | } else { |
32988383 | 1316 | // TODO(danvk): signal error. |
6a1aa64f | 1317 | } |
6a1aa64f DV |
1318 | }; |
1319 | ||
1320 | /** | |
1321 | * Add ticks when the x axis has numbers on it (instead of dates) | |
1322 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1323 | * @param {Number} endDate End of the date window (millis since epoch) | |
1324 | * @return {Array.<Object>} Array of {label, value} tuples. | |
1325 | * @public | |
1326 | */ | |
285a6bda | 1327 | Dygraph.numericTicks = function(minV, maxV, self) { |
c6336f04 DV |
1328 | // Basic idea: |
1329 | // Try labels every 1, 2, 5, 10, 20, 50, 100, etc. | |
1330 | // Calculate the resulting tick spacing (i.e. this.height_ / nTicks). | |
285a6bda | 1331 | // The first spacing greater than pixelsPerYLabel is what we use. |
ff00d3e2 | 1332 | // TODO(danvk): version that works on a log scale. |
f09e46d4 DV |
1333 | if (self.attr_("labelsKMG2")) { |
1334 | var mults = [1, 2, 4, 8]; | |
1335 | } else { | |
1336 | var mults = [1, 2, 5]; | |
1337 | } | |
c6336f04 | 1338 | var scale, low_val, high_val, nTicks; |
285a6bda DV |
1339 | // TODO(danvk): make it possible to set this for x- and y-axes independently. |
1340 | var pixelsPerTick = self.attr_('pixelsPerYLabel'); | |
c6336f04 | 1341 | for (var i = -10; i < 50; i++) { |
f09e46d4 DV |
1342 | if (self.attr_("labelsKMG2")) { |
1343 | var base_scale = Math.pow(16, i); | |
1344 | } else { | |
1345 | var base_scale = Math.pow(10, i); | |
1346 | } | |
c6336f04 DV |
1347 | for (var j = 0; j < mults.length; j++) { |
1348 | scale = base_scale * mults[j]; | |
c6336f04 DV |
1349 | low_val = Math.floor(minV / scale) * scale; |
1350 | high_val = Math.ceil(maxV / scale) * scale; | |
1351 | nTicks = (high_val - low_val) / scale; | |
285a6bda | 1352 | var spacing = self.height_ / nTicks; |
c6336f04 | 1353 | // wish I could break out of both loops at once... |
285a6bda | 1354 | if (spacing > pixelsPerTick) break; |
c6336f04 | 1355 | } |
285a6bda | 1356 | if (spacing > pixelsPerTick) break; |
6a1aa64f DV |
1357 | } |
1358 | ||
1359 | // Construct labels for the ticks | |
1360 | var ticks = []; | |
ed11be50 DV |
1361 | var k; |
1362 | var k_labels = []; | |
1363 | if (self.attr_("labelsKMB")) { | |
1364 | k = 1000; | |
1365 | k_labels = [ "K", "M", "B", "T" ]; | |
1366 | } | |
1367 | if (self.attr_("labelsKMG2")) { | |
1368 | if (k) self.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); | |
1369 | k = 1024; | |
1370 | k_labels = [ "k", "M", "G", "T" ]; | |
1371 | } | |
1372 | ||
c6336f04 DV |
1373 | for (var i = 0; i < nTicks; i++) { |
1374 | var tickV = low_val + i * scale; | |
0af6e346 | 1375 | var absTickV = Math.abs(tickV); |
285a6bda | 1376 | var label = self.round_(tickV, 2); |
ed11be50 DV |
1377 | if (k_labels.length) { |
1378 | // Round up to an appropriate unit. | |
1379 | var n = k*k*k*k; | |
1380 | for (var j = 3; j >= 0; j--, n /= k) { | |
1381 | if (absTickV >= n) { | |
1382 | label = self.round_(tickV / n, 1) + k_labels[j]; | |
1383 | break; | |
1384 | } | |
afefbcdb | 1385 | } |
6a1aa64f DV |
1386 | } |
1387 | ticks.push( {label: label, v: tickV} ); | |
1388 | } | |
1389 | return ticks; | |
1390 | }; | |
1391 | ||
1392 | /** | |
1393 | * Adds appropriate ticks on the y-axis | |
1394 | * @param {Number} minY The minimum Y value in the data set | |
1395 | * @param {Number} maxY The maximum Y value in the data set | |
1396 | * @private | |
1397 | */ | |
285a6bda | 1398 | Dygraph.prototype.addYTicks_ = function(minY, maxY) { |
6a1aa64f | 1399 | // Set the number of ticks so that the labels are human-friendly. |
285a6bda DV |
1400 | // TODO(danvk): make this an attribute as well. |
1401 | var ticks = Dygraph.numericTicks(minY, maxY, this); | |
6a1aa64f DV |
1402 | this.layout_.updateOptions( { yAxis: [minY, maxY], |
1403 | yTicks: ticks } ); | |
1404 | }; | |
1405 | ||
5011e7a1 DV |
1406 | // Computes the range of the data series (including confidence intervals). |
1407 | // series is either [ [x1, y1], [x2, y2], ... ] or | |
1408 | // [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... | |
1409 | // Returns [low, high] | |
1410 | Dygraph.prototype.extremeValues_ = function(series) { | |
1411 | var minY = null, maxY = null; | |
1412 | ||
9922b78b | 1413 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
5011e7a1 DV |
1414 | if (bars) { |
1415 | // With custom bars, maxY is the max of the high values. | |
1416 | for (var j = 0; j < series.length; j++) { | |
1417 | var y = series[j][1][0]; | |
1418 | if (!y) continue; | |
1419 | var low = y - series[j][1][1]; | |
1420 | var high = y + series[j][1][2]; | |
1421 | if (low > y) low = y; // this can happen with custom bars, | |
1422 | if (high < y) high = y; // e.g. in tests/custom-bars.html | |
1423 | if (maxY == null || high > maxY) { | |
1424 | maxY = high; | |
1425 | } | |
1426 | if (minY == null || low < minY) { | |
1427 | minY = low; | |
1428 | } | |
1429 | } | |
1430 | } else { | |
1431 | for (var j = 0; j < series.length; j++) { | |
1432 | var y = series[j][1]; | |
d12999d3 | 1433 | if (y === null || isNaN(y)) continue; |
5011e7a1 DV |
1434 | if (maxY == null || y > maxY) { |
1435 | maxY = y; | |
1436 | } | |
1437 | if (minY == null || y < minY) { | |
1438 | minY = y; | |
1439 | } | |
1440 | } | |
1441 | } | |
1442 | ||
1443 | return [minY, maxY]; | |
1444 | }; | |
1445 | ||
6a1aa64f DV |
1446 | /** |
1447 | * Update the graph with new data. Data is in the format | |
1448 | * [ [date1, val1, val2, ...], [date2, val1, val2, ...] if errorBars=false | |
1449 | * or, if errorBars=true, | |
1450 | * [ [date1, [val1,stddev1], [val2,stddev2], ...], [date2, ...], ...] | |
1451 | * @param {Array.<Object>} data The data (see above) | |
1452 | * @private | |
1453 | */ | |
285a6bda | 1454 | Dygraph.prototype.drawGraph_ = function(data) { |
fe0b7c03 DV |
1455 | // This is used to set the second parameter to drawCallback, below. |
1456 | var is_initial_draw = this.is_initial_draw_; | |
1457 | this.is_initial_draw_ = false; | |
1458 | ||
3bd9c228 | 1459 | var minY = null, maxY = null; |
6a1aa64f | 1460 | this.layout_.removeAllDatasets(); |
285a6bda | 1461 | this.setColors_(); |
9317362d | 1462 | this.attrs_['pointSize'] = 0.5 * this.attr_('highlightCircleSize'); |
285a6bda | 1463 | |
43af96e7 NK |
1464 | // For stacked series. |
1465 | var cumulative_y = []; | |
344ba8c0 | 1466 | var stacked_datasets = []; |
43af96e7 | 1467 | |
6a1aa64f DV |
1468 | // Loop over all fields in the dataset |
1469 | for (var i = 1; i < data[0].length; i++) { | |
1cf11047 DV |
1470 | if (!this.visibility()[i - 1]) continue; |
1471 | ||
6a1aa64f DV |
1472 | var series = []; |
1473 | for (var j = 0; j < data.length; j++) { | |
1474 | var date = data[j][0]; | |
1475 | series[j] = [date, data[j][i]]; | |
1476 | } | |
1477 | series = this.rollingAverage(series, this.rollPeriod_); | |
1478 | ||
1479 | // Prune down to the desired range, if necessary (for zooming) | |
1a26f3fb DV |
1480 | // Because there can be lines going to points outside of the visible area, |
1481 | // we actually prune to visible points, plus one on either side. | |
9922b78b | 1482 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
6a1aa64f DV |
1483 | if (this.dateWindow_) { |
1484 | var low = this.dateWindow_[0]; | |
1485 | var high= this.dateWindow_[1]; | |
1486 | var pruned = []; | |
1a26f3fb DV |
1487 | // TODO(danvk): do binary search instead of linear search. |
1488 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. | |
1489 | var firstIdx = null, lastIdx = null; | |
6a1aa64f | 1490 | for (var k = 0; k < series.length; k++) { |
1a26f3fb DV |
1491 | if (series[k][0] >= low && firstIdx === null) { |
1492 | firstIdx = k; | |
1493 | } | |
1494 | if (series[k][0] <= high) { | |
1495 | lastIdx = k; | |
1496 | } | |
1497 | } | |
1498 | if (firstIdx === null) firstIdx = 0; | |
1499 | if (firstIdx > 0) firstIdx--; | |
1500 | if (lastIdx === null) lastIdx = series.length - 1; | |
1501 | if (lastIdx < series.length - 1) lastIdx++; | |
1502 | for (var k = firstIdx; k <= lastIdx; k++) { | |
1503 | pruned.push(series[k]); | |
6a1aa64f DV |
1504 | } |
1505 | series = pruned; | |
6a1aa64f DV |
1506 | } |
1507 | ||
648acd28 DV |
1508 | var extremes = this.extremeValues_(series); |
1509 | var thisMinY = extremes[0]; | |
1510 | var thisMaxY = extremes[1]; | |
5011e7a1 DV |
1511 | if (!minY || thisMinY < minY) minY = thisMinY; |
1512 | if (!maxY || thisMaxY > maxY) maxY = thisMaxY; | |
1513 | ||
6a1aa64f DV |
1514 | if (bars) { |
1515 | var vals = []; | |
1516 | for (var j=0; j<series.length; j++) | |
1517 | vals[j] = [series[j][0], | |
1518 | series[j][1][0], series[j][1][1], series[j][1][2]]; | |
285a6bda | 1519 | this.layout_.addDataset(this.attr_("labels")[i], vals); |
43af96e7 NK |
1520 | } else if (this.attr_("stackedGraph")) { |
1521 | var vals = []; | |
1522 | var l = series.length; | |
1523 | var actual_y; | |
1524 | for (var j = 0; j < l; j++) { | |
1525 | if (cumulative_y[series[j][0]] === undefined) | |
1526 | cumulative_y[series[j][0]] = 0; | |
1527 | ||
1528 | actual_y = series[j][1]; | |
1529 | cumulative_y[series[j][0]] += actual_y; | |
1530 | ||
1531 | vals[j] = [series[j][0], cumulative_y[series[j][0]]] | |
1532 | ||
1533 | if (!maxY || cumulative_y[series[j][0]] > maxY) | |
1534 | maxY = cumulative_y[series[j][0]]; | |
1535 | } | |
344ba8c0 | 1536 | stacked_datasets.push([this.attr_("labels")[i], vals]); |
43af96e7 | 1537 | //this.layout_.addDataset(this.attr_("labels")[i], vals); |
6a1aa64f | 1538 | } else { |
285a6bda | 1539 | this.layout_.addDataset(this.attr_("labels")[i], series); |
6a1aa64f DV |
1540 | } |
1541 | } | |
1542 | ||
344ba8c0 DV |
1543 | if (stacked_datasets.length > 0) { |
1544 | for (var i = (stacked_datasets.length - 1); i >= 0; i--) { | |
1545 | this.layout_.addDataset(stacked_datasets[i][0], stacked_datasets[i][1]); | |
43af96e7 NK |
1546 | } |
1547 | } | |
1548 | ||
6a1aa64f DV |
1549 | // Use some heuristics to come up with a good maxY value, unless it's been |
1550 | // set explicitly by the user. | |
1551 | if (this.valueRange_ != null) { | |
1552 | this.addYTicks_(this.valueRange_[0], this.valueRange_[1]); | |
3230c662 | 1553 | this.displayedYRange_ = this.valueRange_; |
6a1aa64f | 1554 | } else { |
d053ab5a DV |
1555 | // This affects the calculation of span, below. |
1556 | if (this.attr_("includeZero") && minY > 0) { | |
1557 | minY = 0; | |
1558 | } | |
1559 | ||
6a1aa64f | 1560 | // Add some padding and round up to an integer to be human-friendly. |
3bd9c228 | 1561 | var span = maxY - minY; |
93dfacfd DV |
1562 | // special case: if we have no sense of scale, use +/-10% of the sole value. |
1563 | if (span == 0) { span = maxY; } | |
3bd9c228 DV |
1564 | var maxAxisY = maxY + 0.1 * span; |
1565 | var minAxisY = minY - 0.1 * span; | |
1566 | ||
1567 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. | |
ceb009dd DV |
1568 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; |
1569 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
3bd9c228 DV |
1570 | |
1571 | if (this.attr_("includeZero")) { | |
1572 | if (maxY < 0) maxAxisY = 0; | |
1573 | if (minY > 0) minAxisY = 0; | |
1574 | } | |
1575 | ||
1576 | this.addYTicks_(minAxisY, maxAxisY); | |
3230c662 | 1577 | this.displayedYRange_ = [minAxisY, maxAxisY]; |
6a1aa64f DV |
1578 | } |
1579 | ||
1580 | this.addXTicks_(); | |
1581 | ||
1582 | // Tell PlotKit to use this new data and render itself | |
d033ae1c | 1583 | this.layout_.updateOptions({dateWindow: this.dateWindow_}); |
6a1aa64f DV |
1584 | this.layout_.evaluateWithError(); |
1585 | this.plotter_.clear(); | |
1586 | this.plotter_.render(); | |
f6401bf6 DV |
1587 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
1588 | this.canvas_.height); | |
599fb4ad DV |
1589 | |
1590 | if (this.attr_("drawCallback") !== null) { | |
fe0b7c03 | 1591 | this.attr_("drawCallback")(this, is_initial_draw); |
599fb4ad | 1592 | } |
6a1aa64f DV |
1593 | }; |
1594 | ||
1595 | /** | |
1596 | * Calculates the rolling average of a data set. | |
1597 | * If originalData is [label, val], rolls the average of those. | |
1598 | * If originalData is [label, [, it's interpreted as [value, stddev] | |
1599 | * and the roll is returned in the same form, with appropriately reduced | |
1600 | * stddev for each value. | |
1601 | * Note that this is where fractional input (i.e. '5/10') is converted into | |
1602 | * decimal values. | |
1603 | * @param {Array} originalData The data in the appropriate format (see above) | |
1604 | * @param {Number} rollPeriod The number of days over which to average the data | |
1605 | */ | |
285a6bda | 1606 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
6a1aa64f DV |
1607 | if (originalData.length < 2) |
1608 | return originalData; | |
1609 | var rollPeriod = Math.min(rollPeriod, originalData.length - 1); | |
1610 | var rollingData = []; | |
285a6bda | 1611 | var sigma = this.attr_("sigma"); |
6a1aa64f DV |
1612 | |
1613 | if (this.fractions_) { | |
1614 | var num = 0; | |
1615 | var den = 0; // numerator/denominator | |
1616 | var mult = 100.0; | |
1617 | for (var i = 0; i < originalData.length; i++) { | |
1618 | num += originalData[i][1][0]; | |
1619 | den += originalData[i][1][1]; | |
1620 | if (i - rollPeriod >= 0) { | |
1621 | num -= originalData[i - rollPeriod][1][0]; | |
1622 | den -= originalData[i - rollPeriod][1][1]; | |
1623 | } | |
1624 | ||
1625 | var date = originalData[i][0]; | |
1626 | var value = den ? num / den : 0.0; | |
285a6bda | 1627 | if (this.attr_("errorBars")) { |
6a1aa64f DV |
1628 | if (this.wilsonInterval_) { |
1629 | // For more details on this confidence interval, see: | |
1630 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval | |
1631 | if (den) { | |
1632 | var p = value < 0 ? 0 : value, n = den; | |
1633 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); | |
1634 | var denom = 1 + sigma * sigma / den; | |
1635 | var low = (p + sigma * sigma / (2 * den) - pm) / denom; | |
1636 | var high = (p + sigma * sigma / (2 * den) + pm) / denom; | |
1637 | rollingData[i] = [date, | |
1638 | [p * mult, (p - low) * mult, (high - p) * mult]]; | |
1639 | } else { | |
1640 | rollingData[i] = [date, [0, 0, 0]]; | |
1641 | } | |
1642 | } else { | |
1643 | var stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; | |
1644 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; | |
1645 | } | |
1646 | } else { | |
1647 | rollingData[i] = [date, mult * value]; | |
1648 | } | |
1649 | } | |
9922b78b | 1650 | } else if (this.attr_("customBars")) { |
f6885d6a DV |
1651 | var low = 0; |
1652 | var mid = 0; | |
1653 | var high = 0; | |
1654 | var count = 0; | |
6a1aa64f DV |
1655 | for (var i = 0; i < originalData.length; i++) { |
1656 | var data = originalData[i][1]; | |
1657 | var y = data[1]; | |
1658 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; | |
f6885d6a | 1659 | |
8b91c51f | 1660 | if (y != null && !isNaN(y)) { |
49a7d0d5 DV |
1661 | low += data[0]; |
1662 | mid += y; | |
1663 | high += data[2]; | |
1664 | count += 1; | |
1665 | } | |
f6885d6a DV |
1666 | if (i - rollPeriod >= 0) { |
1667 | var prev = originalData[i - rollPeriod]; | |
8b91c51f | 1668 | if (prev[1][1] != null && !isNaN(prev[1][1])) { |
49a7d0d5 DV |
1669 | low -= prev[1][0]; |
1670 | mid -= prev[1][1]; | |
1671 | high -= prev[1][2]; | |
1672 | count -= 1; | |
1673 | } | |
f6885d6a DV |
1674 | } |
1675 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, | |
1676 | 1.0 * (mid - low) / count, | |
1677 | 1.0 * (high - mid) / count ]]; | |
2769de62 | 1678 | } |
6a1aa64f DV |
1679 | } else { |
1680 | // Calculate the rolling average for the first rollPeriod - 1 points where | |
1681 | // there is not enough data to roll over the full number of days | |
1682 | var num_init_points = Math.min(rollPeriod - 1, originalData.length - 2); | |
285a6bda | 1683 | if (!this.attr_("errorBars")){ |
5011e7a1 DV |
1684 | if (rollPeriod == 1) { |
1685 | return originalData; | |
1686 | } | |
1687 | ||
2847c1cf | 1688 | for (var i = 0; i < originalData.length; i++) { |
6a1aa64f | 1689 | var sum = 0; |
5011e7a1 | 1690 | var num_ok = 0; |
2847c1cf DV |
1691 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
1692 | var y = originalData[j][1]; | |
8b91c51f | 1693 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 1694 | num_ok++; |
2847c1cf | 1695 | sum += originalData[j][1]; |
6a1aa64f | 1696 | } |
5011e7a1 | 1697 | if (num_ok) { |
2847c1cf | 1698 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
5011e7a1 | 1699 | } else { |
2847c1cf | 1700 | rollingData[i] = [originalData[i][0], null]; |
5011e7a1 | 1701 | } |
6a1aa64f | 1702 | } |
2847c1cf DV |
1703 | |
1704 | } else { | |
1705 | for (var i = 0; i < originalData.length; i++) { | |
6a1aa64f DV |
1706 | var sum = 0; |
1707 | var variance = 0; | |
5011e7a1 | 1708 | var num_ok = 0; |
2847c1cf | 1709 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
5011e7a1 | 1710 | var y = originalData[j][1][0]; |
8b91c51f | 1711 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 1712 | num_ok++; |
6a1aa64f DV |
1713 | sum += originalData[j][1][0]; |
1714 | variance += Math.pow(originalData[j][1][1], 2); | |
1715 | } | |
5011e7a1 DV |
1716 | if (num_ok) { |
1717 | var stddev = Math.sqrt(variance) / num_ok; | |
1718 | rollingData[i] = [originalData[i][0], | |
1719 | [sum / num_ok, sigma * stddev, sigma * stddev]]; | |
1720 | } else { | |
1721 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
1722 | } | |
6a1aa64f DV |
1723 | } |
1724 | } | |
1725 | } | |
1726 | ||
1727 | return rollingData; | |
1728 | }; | |
1729 | ||
1730 | /** | |
1731 | * Parses a date, returning the number of milliseconds since epoch. This can be | |
285a6bda DV |
1732 | * passed in as an xValueParser in the Dygraph constructor. |
1733 | * TODO(danvk): enumerate formats that this understands. | |
6a1aa64f DV |
1734 | * @param {String} A date in YYYYMMDD format. |
1735 | * @return {Number} Milliseconds since epoch. | |
1736 | * @public | |
1737 | */ | |
285a6bda | 1738 | Dygraph.dateParser = function(dateStr, self) { |
6a1aa64f | 1739 | var dateStrSlashed; |
285a6bda | 1740 | var d; |
986a5026 | 1741 | if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12' |
6a1aa64f | 1742 | dateStrSlashed = dateStr.replace("-", "/", "g"); |
353a0294 DV |
1743 | while (dateStrSlashed.search("-") != -1) { |
1744 | dateStrSlashed = dateStrSlashed.replace("-", "/"); | |
1745 | } | |
285a6bda | 1746 | d = Date.parse(dateStrSlashed); |
2769de62 | 1747 | } else if (dateStr.length == 8) { // e.g. '20090712' |
285a6bda | 1748 | // TODO(danvk): remove support for this format. It's confusing. |
6a1aa64f DV |
1749 | dateStrSlashed = dateStr.substr(0,4) + "/" + dateStr.substr(4,2) |
1750 | + "/" + dateStr.substr(6,2); | |
285a6bda | 1751 | d = Date.parse(dateStrSlashed); |
2769de62 DV |
1752 | } else { |
1753 | // Any format that Date.parse will accept, e.g. "2009/07/12" or | |
1754 | // "2009/07/12 12:34:56" | |
285a6bda DV |
1755 | d = Date.parse(dateStr); |
1756 | } | |
1757 | ||
1758 | if (!d || isNaN(d)) { | |
1759 | self.error("Couldn't parse " + dateStr + " as a date"); | |
1760 | } | |
1761 | return d; | |
1762 | }; | |
1763 | ||
1764 | /** | |
1765 | * Detects the type of the str (date or numeric) and sets the various | |
1766 | * formatting attributes in this.attrs_ based on this type. | |
1767 | * @param {String} str An x value. | |
1768 | * @private | |
1769 | */ | |
1770 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
1771 | var isDate = false; | |
1772 | if (str.indexOf('-') >= 0 || | |
1773 | str.indexOf('/') >= 0 || | |
1774 | isNaN(parseFloat(str))) { | |
1775 | isDate = true; | |
1776 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
1777 | // TODO(danvk): remove support for this format. | |
1778 | isDate = true; | |
1779 | } | |
1780 | ||
1781 | if (isDate) { | |
1782 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
1783 | this.attrs_.xValueParser = Dygraph.dateParser; | |
1784 | this.attrs_.xTicker = Dygraph.dateTicker; | |
1785 | } else { | |
1786 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
1787 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
1788 | this.attrs_.xTicker = Dygraph.numericTicks; | |
6a1aa64f | 1789 | } |
6a1aa64f DV |
1790 | }; |
1791 | ||
1792 | /** | |
1793 | * Parses a string in a special csv format. We expect a csv file where each | |
1794 | * line is a date point, and the first field in each line is the date string. | |
1795 | * We also expect that all remaining fields represent series. | |
285a6bda | 1796 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f DV |
1797 | * date, series1, stddev1, series2, stddev2, ... |
1798 | * @param {Array.<Object>} data See above. | |
1799 | * @private | |
285a6bda DV |
1800 | * |
1801 | * @return Array.<Object> An array with one entry for each row. These entries | |
1802 | * are an array of cells in that row. The first entry is the parsed x-value for | |
1803 | * the row. The second, third, etc. are the y-values. These can take on one of | |
1804 | * three forms, depending on the CSV and constructor parameters: | |
1805 | * 1. numeric value | |
1806 | * 2. [ value, stddev ] | |
1807 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 1808 | */ |
285a6bda | 1809 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f DV |
1810 | var ret = []; |
1811 | var lines = data.split("\n"); | |
3d67f03b DV |
1812 | |
1813 | // Use the default delimiter or fall back to a tab if that makes sense. | |
1814 | var delim = this.attr_('delimiter'); | |
1815 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { | |
1816 | delim = '\t'; | |
1817 | } | |
1818 | ||
285a6bda | 1819 | var start = 0; |
6a1aa64f | 1820 | if (this.labelsFromCSV_) { |
285a6bda | 1821 | start = 1; |
3d67f03b | 1822 | this.attrs_.labels = lines[0].split(delim); |
6a1aa64f DV |
1823 | } |
1824 | ||
285a6bda DV |
1825 | var xParser; |
1826 | var defaultParserSet = false; // attempt to auto-detect x value type | |
1827 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 1828 | var outOfOrder = false; |
6a1aa64f DV |
1829 | for (var i = start; i < lines.length; i++) { |
1830 | var line = lines[i]; | |
1831 | if (line.length == 0) continue; // skip blank lines | |
3d67f03b DV |
1832 | if (line[0] == '#') continue; // skip comment lines |
1833 | var inFields = line.split(delim); | |
285a6bda | 1834 | if (inFields.length < 2) continue; |
6a1aa64f DV |
1835 | |
1836 | var fields = []; | |
285a6bda DV |
1837 | if (!defaultParserSet) { |
1838 | this.detectTypeFromString_(inFields[0]); | |
1839 | xParser = this.attr_("xValueParser"); | |
1840 | defaultParserSet = true; | |
1841 | } | |
1842 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
1843 | |
1844 | // If fractions are expected, parse the numbers as "A/B" | |
1845 | if (this.fractions_) { | |
1846 | for (var j = 1; j < inFields.length; j++) { | |
1847 | // TODO(danvk): figure out an appropriate way to flag parse errors. | |
1848 | var vals = inFields[j].split("/"); | |
1849 | fields[j] = [parseFloat(vals[0]), parseFloat(vals[1])]; | |
1850 | } | |
285a6bda | 1851 | } else if (this.attr_("errorBars")) { |
6a1aa64f DV |
1852 | // If there are error bars, values are (value, stddev) pairs |
1853 | for (var j = 1; j < inFields.length; j += 2) | |
1854 | fields[(j + 1) / 2] = [parseFloat(inFields[j]), | |
1855 | parseFloat(inFields[j + 1])]; | |
9922b78b | 1856 | } else if (this.attr_("customBars")) { |
6a1aa64f DV |
1857 | // Bars are a low;center;high tuple |
1858 | for (var j = 1; j < inFields.length; j++) { | |
1859 | var vals = inFields[j].split(";"); | |
1860 | fields[j] = [ parseFloat(vals[0]), | |
1861 | parseFloat(vals[1]), | |
1862 | parseFloat(vals[2]) ]; | |
1863 | } | |
1864 | } else { | |
1865 | // Values are just numbers | |
285a6bda | 1866 | for (var j = 1; j < inFields.length; j++) { |
6a1aa64f | 1867 | fields[j] = parseFloat(inFields[j]); |
285a6bda | 1868 | } |
6a1aa64f | 1869 | } |
987840a2 DV |
1870 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
1871 | outOfOrder = true; | |
1872 | } | |
6a1aa64f | 1873 | ret.push(fields); |
285a6bda DV |
1874 | |
1875 | if (fields.length != expectedCols) { | |
1876 | this.error("Number of columns in line " + i + " (" + fields.length + | |
1877 | ") does not agree with number of labels (" + expectedCols + | |
1878 | ") " + line); | |
1879 | } | |
6a1aa64f | 1880 | } |
987840a2 DV |
1881 | |
1882 | if (outOfOrder) { | |
1883 | this.warn("CSV is out of order; order it correctly to speed loading."); | |
1884 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
1885 | } | |
1886 | ||
6a1aa64f DV |
1887 | return ret; |
1888 | }; | |
1889 | ||
1890 | /** | |
285a6bda DV |
1891 | * The user has provided their data as a pre-packaged JS array. If the x values |
1892 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
1893 | * are dates, we need to convert them from Date objects to ms since epoch. | |
1894 | * @param {Array.<Object>} data | |
1895 | * @return {Array.<Object>} data with numeric x values. | |
1896 | */ | |
1897 | Dygraph.prototype.parseArray_ = function(data) { | |
1898 | // Peek at the first x value to see if it's numeric. | |
1899 | if (data.length == 0) { | |
1900 | this.error("Can't plot empty data set"); | |
1901 | return null; | |
1902 | } | |
1903 | if (data[0].length == 0) { | |
1904 | this.error("Data set cannot contain an empty row"); | |
1905 | return null; | |
1906 | } | |
1907 | ||
1908 | if (this.attr_("labels") == null) { | |
1909 | this.warn("Using default labels. Set labels explicitly via 'labels' " + | |
1910 | "in the options parameter"); | |
1911 | this.attrs_.labels = [ "X" ]; | |
1912 | for (var i = 1; i < data[0].length; i++) { | |
1913 | this.attrs_.labels.push("Y" + i); | |
1914 | } | |
1915 | } | |
1916 | ||
2dda3850 | 1917 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda DV |
1918 | // Some intelligent defaults for a date x-axis. |
1919 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
1920 | this.attrs_.xTicker = Dygraph.dateTicker; | |
1921 | ||
1922 | // Assume they're all dates. | |
e3ab7b40 | 1923 | var parsedData = Dygraph.clone(data); |
285a6bda DV |
1924 | for (var i = 0; i < data.length; i++) { |
1925 | if (parsedData[i].length == 0) { | |
1926 | this.error("Row " << (1 + i) << " of data is empty"); | |
1927 | return null; | |
1928 | } | |
1929 | if (parsedData[i][0] == null | |
3a909ec5 DV |
1930 | || typeof(parsedData[i][0].getTime) != 'function' |
1931 | || isNaN(parsedData[i][0].getTime())) { | |
be96a1f5 | 1932 | this.error("x value in row " + (1 + i) + " is not a Date"); |
285a6bda DV |
1933 | return null; |
1934 | } | |
1935 | parsedData[i][0] = parsedData[i][0].getTime(); | |
1936 | } | |
1937 | return parsedData; | |
1938 | } else { | |
1939 | // Some intelligent defaults for a numeric x-axis. | |
1940 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
1941 | this.attrs_.xTicker = Dygraph.numericTicks; | |
1942 | return data; | |
1943 | } | |
1944 | }; | |
1945 | ||
1946 | /** | |
79420a1e DV |
1947 | * Parses a DataTable object from gviz. |
1948 | * The data is expected to have a first column that is either a date or a | |
1949 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
1950 | * between this.xValueParser_ and the type of the first column, it will be | |
1951 | * fixed. Returned value is in the same format as return value of parseCSV_. | |
1952 | * @param {Array.<Object>} data See above. | |
1953 | * @private | |
1954 | */ | |
285a6bda | 1955 | Dygraph.prototype.parseDataTable_ = function(data) { |
79420a1e DV |
1956 | var cols = data.getNumberOfColumns(); |
1957 | var rows = data.getNumberOfRows(); | |
1958 | ||
1959 | // Read column labels | |
1960 | var labels = []; | |
1961 | for (var i = 0; i < cols; i++) { | |
1962 | labels.push(data.getColumnLabel(i)); | |
3e3f84e4 | 1963 | if (i != 0 && this.attr_("errorBars")) i += 1; |
79420a1e | 1964 | } |
285a6bda | 1965 | this.attrs_.labels = labels; |
3e3f84e4 | 1966 | cols = labels.length; |
79420a1e | 1967 | |
d955e223 | 1968 | var indepType = data.getColumnType(0); |
4440f6c8 | 1969 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda DV |
1970 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
1971 | this.attrs_.xValueParser = Dygraph.dateParser; | |
1972 | this.attrs_.xTicker = Dygraph.dateTicker; | |
33127159 | 1973 | } else if (indepType == 'number') { |
285a6bda DV |
1974 | this.attrs_.xValueFormatter = function(x) { return x; }; |
1975 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
1976 | this.attrs_.xTicker = Dygraph.numericTicks; | |
1977 | } else { | |
987840a2 DV |
1978 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
1979 | "column 1 of DataTable input (Got '" + indepType + "')"); | |
79420a1e DV |
1980 | return null; |
1981 | } | |
1982 | ||
1983 | var ret = []; | |
987840a2 | 1984 | var outOfOrder = false; |
79420a1e DV |
1985 | for (var i = 0; i < rows; i++) { |
1986 | var row = []; | |
debe4434 DV |
1987 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
1988 | data.getValue(i, 0) === null) { | |
1989 | this.warning("Ignoring row " + i + | |
1990 | " of DataTable because of undefined or null first column."); | |
1991 | continue; | |
1992 | } | |
1993 | ||
c21d2c2d | 1994 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
1995 | row.push(data.getValue(i, 0).getTime()); |
1996 | } else { | |
1997 | row.push(data.getValue(i, 0)); | |
1998 | } | |
3e3f84e4 DV |
1999 | if (!this.attr_("errorBars")) { |
2000 | for (var j = 1; j < cols; j++) { | |
2001 | row.push(data.getValue(i, j)); | |
2002 | } | |
2003 | } else { | |
2004 | for (var j = 0; j < cols - 1; j++) { | |
2005 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); | |
2006 | } | |
79420a1e | 2007 | } |
987840a2 DV |
2008 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
2009 | outOfOrder = true; | |
2010 | } | |
243d96e8 | 2011 | ret.push(row); |
79420a1e | 2012 | } |
987840a2 DV |
2013 | |
2014 | if (outOfOrder) { | |
2015 | this.warn("DataTable is out of order; order it correctly to speed loading."); | |
2016 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2017 | } | |
79420a1e DV |
2018 | return ret; |
2019 | } | |
2020 | ||
24e5350c | 2021 | // These functions are all based on MochiKit. |
fc80a396 DV |
2022 | Dygraph.update = function (self, o) { |
2023 | if (typeof(o) != 'undefined' && o !== null) { | |
2024 | for (var k in o) { | |
85b99f0b DV |
2025 | if (o.hasOwnProperty(k)) { |
2026 | self[k] = o[k]; | |
2027 | } | |
fc80a396 DV |
2028 | } |
2029 | } | |
2030 | return self; | |
2031 | }; | |
2032 | ||
2dda3850 DV |
2033 | Dygraph.isArrayLike = function (o) { |
2034 | var typ = typeof(o); | |
2035 | if ( | |
c21d2c2d | 2036 | (typ != 'object' && !(typ == 'function' && |
2dda3850 DV |
2037 | typeof(o.item) == 'function')) || |
2038 | o === null || | |
2039 | typeof(o.length) != 'number' || | |
2040 | o.nodeType === 3 | |
2041 | ) { | |
2042 | return false; | |
2043 | } | |
2044 | return true; | |
2045 | }; | |
2046 | ||
2047 | Dygraph.isDateLike = function (o) { | |
2048 | if (typeof(o) != "object" || o === null || | |
2049 | typeof(o.getTime) != 'function') { | |
2050 | return false; | |
2051 | } | |
2052 | return true; | |
2053 | }; | |
2054 | ||
e3ab7b40 DV |
2055 | Dygraph.clone = function(o) { |
2056 | // TODO(danvk): figure out how MochiKit's version works | |
2057 | var r = []; | |
2058 | for (var i = 0; i < o.length; i++) { | |
2059 | if (Dygraph.isArrayLike(o[i])) { | |
2060 | r.push(Dygraph.clone(o[i])); | |
2061 | } else { | |
2062 | r.push(o[i]); | |
2063 | } | |
2064 | } | |
2065 | return r; | |
24e5350c DV |
2066 | }; |
2067 | ||
2dda3850 | 2068 | |
79420a1e | 2069 | /** |
6a1aa64f DV |
2070 | * Get the CSV data. If it's in a function, call that function. If it's in a |
2071 | * file, do an XMLHttpRequest to get it. | |
2072 | * @private | |
2073 | */ | |
285a6bda | 2074 | Dygraph.prototype.start_ = function() { |
6a1aa64f | 2075 | if (typeof this.file_ == 'function') { |
285a6bda | 2076 | // CSV string. Pretend we got it via XHR. |
6a1aa64f | 2077 | this.loadedEvent_(this.file_()); |
2dda3850 | 2078 | } else if (Dygraph.isArrayLike(this.file_)) { |
285a6bda DV |
2079 | this.rawData_ = this.parseArray_(this.file_); |
2080 | this.drawGraph_(this.rawData_); | |
79420a1e DV |
2081 | } else if (typeof this.file_ == 'object' && |
2082 | typeof this.file_.getColumnRange == 'function') { | |
2083 | // must be a DataTable from gviz. | |
2084 | this.rawData_ = this.parseDataTable_(this.file_); | |
2085 | this.drawGraph_(this.rawData_); | |
285a6bda DV |
2086 | } else if (typeof this.file_ == 'string') { |
2087 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. | |
2088 | if (this.file_.indexOf('\n') >= 0) { | |
2089 | this.loadedEvent_(this.file_); | |
2090 | } else { | |
2091 | var req = new XMLHttpRequest(); | |
2092 | var caller = this; | |
2093 | req.onreadystatechange = function () { | |
2094 | if (req.readyState == 4) { | |
2095 | if (req.status == 200) { | |
2096 | caller.loadedEvent_(req.responseText); | |
2097 | } | |
6a1aa64f | 2098 | } |
285a6bda | 2099 | }; |
6a1aa64f | 2100 | |
285a6bda DV |
2101 | req.open("GET", this.file_, true); |
2102 | req.send(null); | |
2103 | } | |
2104 | } else { | |
2105 | this.error("Unknown data format: " + (typeof this.file_)); | |
6a1aa64f DV |
2106 | } |
2107 | }; | |
2108 | ||
2109 | /** | |
2110 | * Changes various properties of the graph. These can include: | |
2111 | * <ul> | |
2112 | * <li>file: changes the source data for the graph</li> | |
2113 | * <li>errorBars: changes whether the data contains stddev</li> | |
2114 | * </ul> | |
2115 | * @param {Object} attrs The new properties and values | |
2116 | */ | |
285a6bda DV |
2117 | Dygraph.prototype.updateOptions = function(attrs) { |
2118 | // TODO(danvk): this is a mess. Rethink this function. | |
6a1aa64f DV |
2119 | if (attrs.rollPeriod) { |
2120 | this.rollPeriod_ = attrs.rollPeriod; | |
2121 | } | |
2122 | if (attrs.dateWindow) { | |
2123 | this.dateWindow_ = attrs.dateWindow; | |
2124 | } | |
2125 | if (attrs.valueRange) { | |
2126 | this.valueRange_ = attrs.valueRange; | |
2127 | } | |
fc80a396 | 2128 | Dygraph.update(this.user_attrs_, attrs); |
285a6bda DV |
2129 | |
2130 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
2131 | ||
2132 | // TODO(danvk): this doesn't match the constructor logic | |
2133 | this.layout_.updateOptions({ 'errorBars': this.attr_("errorBars") }); | |
6a1aa64f DV |
2134 | if (attrs['file'] && attrs['file'] != this.file_) { |
2135 | this.file_ = attrs['file']; | |
2136 | this.start_(); | |
2137 | } else { | |
2138 | this.drawGraph_(this.rawData_); | |
2139 | } | |
2140 | }; | |
2141 | ||
2142 | /** | |
697e70b2 DV |
2143 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
2144 | * containing div (which has presumably changed size since the dygraph was | |
2145 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
2146 | * |
2147 | * This is far more efficient than destroying and re-instantiating a | |
2148 | * Dygraph, since it doesn't have to reparse the underlying data. | |
2149 | * | |
697e70b2 DV |
2150 | * @param {Number} width Width (in pixels) |
2151 | * @param {Number} height Height (in pixels) | |
2152 | */ | |
2153 | Dygraph.prototype.resize = function(width, height) { | |
2154 | if ((width === null) != (height === null)) { | |
2155 | this.warn("Dygraph.resize() should be called with zero parameters or " + | |
2156 | "two non-NULL parameters. Pretending it was zero."); | |
2157 | width = height = null; | |
2158 | } | |
2159 | ||
b16e6369 | 2160 | // TODO(danvk): there should be a clear() method. |
697e70b2 | 2161 | this.maindiv_.innerHTML = ""; |
b16e6369 DV |
2162 | this.attrs_.labelsDiv = null; |
2163 | ||
697e70b2 DV |
2164 | if (width) { |
2165 | this.maindiv_.style.width = width + "px"; | |
2166 | this.maindiv_.style.height = height + "px"; | |
2167 | this.width_ = width; | |
2168 | this.height_ = height; | |
2169 | } else { | |
2170 | this.width_ = this.maindiv_.offsetWidth; | |
2171 | this.height_ = this.maindiv_.offsetHeight; | |
2172 | } | |
2173 | ||
2174 | this.createInterface_(); | |
964f30c6 | 2175 | this.drawGraph_(this.rawData_); |
697e70b2 DV |
2176 | }; |
2177 | ||
2178 | /** | |
6a1aa64f DV |
2179 | * Adjusts the number of days in the rolling average. Updates the graph to |
2180 | * reflect the new averaging period. | |
2181 | * @param {Number} length Number of days over which to average the data. | |
2182 | */ | |
285a6bda | 2183 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f DV |
2184 | this.rollPeriod_ = length; |
2185 | this.drawGraph_(this.rawData_); | |
2186 | }; | |
540d00f1 | 2187 | |
f8cfec73 | 2188 | /** |
1cf11047 DV |
2189 | * Returns a boolean array of visibility statuses. |
2190 | */ | |
2191 | Dygraph.prototype.visibility = function() { | |
2192 | // Do lazy-initialization, so that this happens after we know the number of | |
2193 | // data series. | |
2194 | if (!this.attr_("visibility")) { | |
f38dec01 | 2195 | this.attrs_["visibility"] = []; |
1cf11047 DV |
2196 | } |
2197 | while (this.attr_("visibility").length < this.rawData_[0].length - 1) { | |
f38dec01 | 2198 | this.attr_("visibility").push(true); |
1cf11047 DV |
2199 | } |
2200 | return this.attr_("visibility"); | |
2201 | }; | |
2202 | ||
2203 | /** | |
2204 | * Changes the visiblity of a series. | |
2205 | */ | |
2206 | Dygraph.prototype.setVisibility = function(num, value) { | |
2207 | var x = this.visibility(); | |
2208 | if (num < 0 && num >= x.length) { | |
2209 | this.warn("invalid series number in setVisibility: " + num); | |
2210 | } else { | |
2211 | x[num] = value; | |
2212 | this.drawGraph_(this.rawData_); | |
2213 | } | |
2214 | }; | |
2215 | ||
2216 | /** | |
f8cfec73 DV |
2217 | * Create a new canvas element. This is more complex than a simple |
2218 | * document.createElement("canvas") because of IE and excanvas. | |
2219 | */ | |
2220 | Dygraph.createCanvas = function() { | |
2221 | var canvas = document.createElement("canvas"); | |
2222 | ||
2223 | isIE = (/MSIE/.test(navigator.userAgent) && !window.opera); | |
2224 | if (isIE) { | |
2225 | canvas = G_vmlCanvasManager.initElement(canvas); | |
2226 | } | |
2227 | ||
2228 | return canvas; | |
2229 | }; | |
2230 | ||
540d00f1 DV |
2231 | |
2232 | /** | |
285a6bda | 2233 | * A wrapper around Dygraph that implements the gviz API. |
540d00f1 DV |
2234 | * @param {Object} container The DOM object the visualization should live in. |
2235 | */ | |
285a6bda | 2236 | Dygraph.GVizChart = function(container) { |
540d00f1 DV |
2237 | this.container = container; |
2238 | } | |
2239 | ||
285a6bda | 2240 | Dygraph.GVizChart.prototype.draw = function(data, options) { |
540d00f1 | 2241 | this.container.innerHTML = ''; |
285a6bda | 2242 | this.date_graph = new Dygraph(this.container, data, options); |
540d00f1 | 2243 | } |
285a6bda | 2244 | |
239c712d NAG |
2245 | /** |
2246 | * Google charts compatible setSelection | |
2247 | * Only row selection is supported, all points in the | |
2248 | * row will be highlighted | |
2249 | * @param {Array} array of the selected cells | |
2250 | * @public | |
2251 | */ | |
2252 | Dygraph.GVizChart.prototype.setSelection = function(selection_array) { | |
2253 | var row = false; | |
2254 | if (selection_array.length) { | |
2255 | row = selection_array[0].row; | |
2256 | } | |
2257 | this.date_graph.setSelection(row); | |
2258 | } | |
2259 | ||
103b7292 NAG |
2260 | /** |
2261 | * Google charts compatible getSelection implementation | |
2262 | * @return {Array} array of the selected cells | |
2263 | * @public | |
2264 | */ | |
2265 | Dygraph.GVizChart.prototype.getSelection = function() { | |
2266 | var selection = []; | |
2267 | ||
2268 | var row = this.date_graph.getSelection(); | |
2269 | ||
2270 | if (row < 0) return selection; | |
2271 | ||
2272 | col = 1; | |
2273 | for (var i in this.date_graph.layout_.datasets) { | |
2274 | selection.push({row: row, column: col}); | |
2275 | col++; | |
2276 | } | |
2277 | ||
2278 | return selection; | |
2279 | } | |
2280 | ||
285a6bda DV |
2281 | // Older pages may still use this name. |
2282 | DateGraph = Dygraph; |