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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, |
d160cc3b | 95 | showLabelsOnHighlight: true, |
12e4c741 | 96 | |
029da4b6 | 97 | yValueFormatter: function(x) { return Dygraph.round_(x, 2); }, |
285a6bda DV |
98 | |
99 | strokeWidth: 1.0, | |
8e4a6af3 | 100 | |
8846615a DV |
101 | axisTickSize: 3, |
102 | axisLabelFontSize: 14, | |
103 | xAxisLabelWidth: 50, | |
104 | yAxisLabelWidth: 50, | |
bf640e56 | 105 | xAxisLabelFormatter: Dygraph.dateAxisFormatter, |
8846615a | 106 | rightGap: 5, |
285a6bda DV |
107 | |
108 | showRoller: false, | |
109 | xValueFormatter: Dygraph.dateString_, | |
110 | xValueParser: Dygraph.dateParser, | |
111 | xTicker: Dygraph.dateTicker, | |
112 | ||
3d67f03b DV |
113 | delimiter: ',', |
114 | ||
ff00d3e2 | 115 | logScale: false, |
285a6bda DV |
116 | sigma: 2.0, |
117 | errorBars: false, | |
118 | fractions: false, | |
119 | wilsonInterval: true, // only relevant if fractions is true | |
5954ef32 | 120 | customBars: false, |
43af96e7 NK |
121 | fillGraph: false, |
122 | fillAlpha: 0.15, | |
f032c51d | 123 | connectSeparatedPoints: false, |
43af96e7 NK |
124 | |
125 | stackedGraph: false, | |
afdc483f NN |
126 | hideOverlayOnMouseOut: true, |
127 | ||
128 | stepPlot: false | |
285a6bda DV |
129 | }; |
130 | ||
131 | // Various logging levels. | |
132 | Dygraph.DEBUG = 1; | |
133 | Dygraph.INFO = 2; | |
134 | Dygraph.WARNING = 3; | |
135 | Dygraph.ERROR = 3; | |
136 | ||
137 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { | |
138 | // Labels is no longer a constructor parameter, since it's typically set | |
139 | // directly from the data source. It also conains a name for the x-axis, | |
140 | // which the previous constructor form did not. | |
141 | if (labels != null) { | |
142 | var new_labels = ["Date"]; | |
143 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); | |
fc80a396 | 144 | Dygraph.update(attrs, { 'labels': new_labels }); |
285a6bda DV |
145 | } |
146 | this.__init__(div, file, attrs); | |
8e4a6af3 DV |
147 | }; |
148 | ||
6a1aa64f | 149 | /** |
285a6bda | 150 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
6a1aa64f DV |
151 | * and interaction <canvas> inside of it. See the constructor for details |
152 | * on the parameters. | |
12e4c741 | 153 | * @param {Element} div the Element to render the graph into. |
6a1aa64f | 154 | * @param {String | Function} file Source data |
6a1aa64f DV |
155 | * @param {Object} attrs Miscellaneous other options |
156 | * @private | |
157 | */ | |
285a6bda DV |
158 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
159 | // Support two-argument constructor | |
160 | if (attrs == null) { attrs = {}; } | |
161 | ||
6a1aa64f | 162 | // Copy the important bits into the object |
32988383 | 163 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
6a1aa64f | 164 | this.maindiv_ = div; |
6a1aa64f | 165 | this.file_ = file; |
285a6bda | 166 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
6a1aa64f | 167 | this.previousVerticalX_ = -1; |
6a1aa64f | 168 | this.fractions_ = attrs.fractions || false; |
6a1aa64f DV |
169 | this.dateWindow_ = attrs.dateWindow || null; |
170 | this.valueRange_ = attrs.valueRange || null; | |
6a1aa64f | 171 | this.wilsonInterval_ = attrs.wilsonInterval || true; |
fe0b7c03 | 172 | this.is_initial_draw_ = true; |
8e4a6af3 | 173 | |
f7d6278e DV |
174 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
175 | // div, then only one will be drawn. | |
176 | div.innerHTML = ""; | |
177 | ||
c21d2c2d | 178 | // If the div isn't already sized then inherit from our attrs or |
179 | // give it a default size. | |
285a6bda | 180 | if (div.style.width == '') { |
c21d2c2d | 181 | div.style.width = attrs.width || Dygraph.DEFAULT_WIDTH + "px"; |
285a6bda DV |
182 | } |
183 | if (div.style.height == '') { | |
c21d2c2d | 184 | div.style.height = attrs.height || Dygraph.DEFAULT_HEIGHT + "px"; |
32988383 | 185 | } |
285a6bda DV |
186 | this.width_ = parseInt(div.style.width, 10); |
187 | this.height_ = parseInt(div.style.height, 10); | |
c21d2c2d | 188 | // The div might have been specified as percent of the current window size, |
189 | // convert that to an appropriate number of pixels. | |
190 | if (div.style.width.indexOf("%") == div.style.width.length - 1) { | |
c6f45033 | 191 | this.width_ = div.offsetWidth; |
c21d2c2d | 192 | } |
193 | if (div.style.height.indexOf("%") == div.style.height.length - 1) { | |
c6f45033 | 194 | this.height_ = div.offsetHeight; |
c21d2c2d | 195 | } |
32988383 | 196 | |
10a6456d DV |
197 | if (this.width_ == 0) { |
198 | this.error("dygraph has zero width. Please specify a width in pixels."); | |
199 | } | |
200 | if (this.height_ == 0) { | |
201 | this.error("dygraph has zero height. Please specify a height in pixels."); | |
202 | } | |
203 | ||
344ba8c0 | 204 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
43af96e7 NK |
205 | if (attrs['stackedGraph']) { |
206 | attrs['fillGraph'] = true; | |
207 | // TODO(nikhilk): Add any other stackedGraph checks here. | |
208 | } | |
209 | ||
285a6bda DV |
210 | // Dygraphs has many options, some of which interact with one another. |
211 | // To keep track of everything, we maintain two sets of options: | |
212 | // | |
c21d2c2d | 213 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
214 | // this.attrs_ defaults, options derived from user_attrs_, data. |
215 | // | |
216 | // Options are then accessed this.attr_('attr'), which first looks at | |
217 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
218 | // defaults without overriding behavior that the user specifically asks for. | |
219 | this.user_attrs_ = {}; | |
fc80a396 | 220 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 221 | |
285a6bda | 222 | this.attrs_ = {}; |
fc80a396 | 223 | Dygraph.update(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 224 | |
16269f6e | 225 | this.boundaryIds_ = []; |
6a1aa64f | 226 | |
285a6bda DV |
227 | // Make a note of whether labels will be pulled from the CSV file. |
228 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
6a1aa64f DV |
229 | |
230 | // Create the containing DIV and other interactive elements | |
231 | this.createInterface_(); | |
232 | ||
738fc797 | 233 | this.start_(); |
6a1aa64f DV |
234 | }; |
235 | ||
285a6bda DV |
236 | Dygraph.prototype.attr_ = function(name) { |
237 | if (typeof(this.user_attrs_[name]) != 'undefined') { | |
238 | return this.user_attrs_[name]; | |
239 | } else if (typeof(this.attrs_[name]) != 'undefined') { | |
240 | return this.attrs_[name]; | |
241 | } else { | |
242 | return null; | |
243 | } | |
244 | }; | |
245 | ||
246 | // TODO(danvk): any way I can get the line numbers to be this.warn call? | |
247 | Dygraph.prototype.log = function(severity, message) { | |
248 | if (typeof(console) != 'undefined') { | |
249 | switch (severity) { | |
250 | case Dygraph.DEBUG: | |
251 | console.debug('dygraphs: ' + message); | |
252 | break; | |
253 | case Dygraph.INFO: | |
254 | console.info('dygraphs: ' + message); | |
255 | break; | |
256 | case Dygraph.WARNING: | |
257 | console.warn('dygraphs: ' + message); | |
258 | break; | |
259 | case Dygraph.ERROR: | |
260 | console.error('dygraphs: ' + message); | |
261 | break; | |
262 | } | |
263 | } | |
264 | } | |
265 | Dygraph.prototype.info = function(message) { | |
266 | this.log(Dygraph.INFO, message); | |
267 | } | |
268 | Dygraph.prototype.warn = function(message) { | |
269 | this.log(Dygraph.WARNING, message); | |
270 | } | |
271 | Dygraph.prototype.error = function(message) { | |
272 | this.log(Dygraph.ERROR, message); | |
273 | } | |
274 | ||
6a1aa64f DV |
275 | /** |
276 | * Returns the current rolling period, as set by the user or an option. | |
277 | * @return {Number} The number of days in the rolling window | |
278 | */ | |
285a6bda | 279 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 280 | return this.rollPeriod_; |
76171648 DV |
281 | }; |
282 | ||
599fb4ad DV |
283 | /** |
284 | * Returns the currently-visible x-range. This can be affected by zooming, | |
285 | * panning or a call to updateOptions. | |
286 | * Returns a two-element array: [left, right]. | |
287 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
288 | */ | |
289 | Dygraph.prototype.xAxisRange = function() { | |
290 | if (this.dateWindow_) return this.dateWindow_; | |
291 | ||
292 | // The entire chart is visible. | |
293 | var left = this.rawData_[0][0]; | |
294 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
295 | return [left, right]; | |
296 | }; | |
297 | ||
3230c662 DV |
298 | /** |
299 | * Returns the currently-visible y-range. This can be affected by zooming, | |
300 | * panning or a call to updateOptions. | |
301 | * Returns a two-element array: [bottom, top]. | |
302 | */ | |
303 | Dygraph.prototype.yAxisRange = function() { | |
304 | return this.displayedYRange_; | |
305 | }; | |
306 | ||
307 | /** | |
308 | * Convert from data coordinates to canvas/div X/Y coordinates. | |
309 | * Returns a two-element array: [X, Y] | |
310 | */ | |
311 | Dygraph.prototype.toDomCoords = function(x, y) { | |
312 | var ret = [null, null]; | |
313 | var area = this.plotter_.area; | |
314 | if (x !== null) { | |
315 | var xRange = this.xAxisRange(); | |
316 | ret[0] = area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; | |
317 | } | |
318 | ||
319 | if (y !== null) { | |
320 | var yRange = this.yAxisRange(); | |
891ad846 | 321 | ret[1] = area.y + (yRange[1] - y) / (yRange[1] - yRange[0]) * area.h; |
3230c662 DV |
322 | } |
323 | ||
324 | return ret; | |
325 | }; | |
326 | ||
56623f3b | 327 | // TODO(danvk): use these functions throughout dygraphs. |
3230c662 DV |
328 | /** |
329 | * Convert from canvas/div coords to data coordinates. | |
330 | * Returns a two-element array: [X, Y] | |
331 | */ | |
332 | Dygraph.prototype.toDataCoords = function(x, y) { | |
333 | var ret = [null, null]; | |
334 | var area = this.plotter_.area; | |
335 | if (x !== null) { | |
336 | var xRange = this.xAxisRange(); | |
337 | ret[0] = xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); | |
338 | } | |
339 | ||
340 | if (y !== null) { | |
341 | var yRange = this.yAxisRange(); | |
342 | ret[1] = yRange[0] + (area.h - y) / area.h * (yRange[1] - yRange[0]); | |
343 | } | |
344 | ||
345 | return ret; | |
346 | }; | |
347 | ||
76171648 DV |
348 | Dygraph.addEvent = function(el, evt, fn) { |
349 | var normed_fn = function(e) { | |
350 | if (!e) var e = window.event; | |
351 | fn(e); | |
352 | }; | |
353 | if (window.addEventListener) { // Mozilla, Netscape, Firefox | |
354 | el.addEventListener(evt, normed_fn, false); | |
355 | } else { // IE | |
356 | el.attachEvent('on' + evt, normed_fn); | |
357 | } | |
358 | }; | |
6a1aa64f | 359 | |
4c47502d DV |
360 | Dygraph.clipCanvas_ = function(cnv, clip) { |
361 | var ctx = cnv.getContext("2d"); | |
362 | ctx.beginPath(); | |
363 | ctx.rect(clip.left, clip.top, clip.width, clip.height); | |
364 | ctx.clip(); | |
365 | }; | |
366 | ||
6a1aa64f | 367 | /** |
285a6bda | 368 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 369 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 370 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
371 | * @private |
372 | */ | |
285a6bda | 373 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
374 | // Create the all-enclosing graph div |
375 | var enclosing = this.maindiv_; | |
376 | ||
b0c3b730 DV |
377 | this.graphDiv = document.createElement("div"); |
378 | this.graphDiv.style.width = this.width_ + "px"; | |
379 | this.graphDiv.style.height = this.height_ + "px"; | |
380 | enclosing.appendChild(this.graphDiv); | |
381 | ||
4c47502d DV |
382 | var clip = { |
383 | top: 0, | |
384 | left: this.attr_("yAxisLabelWidth") + 2 * this.attr_("axisTickSize") | |
385 | }; | |
386 | clip.width = this.width_ - clip.left - this.attr_("rightGap"); | |
387 | clip.height = this.height_ - this.attr_("axisLabelFontSize") | |
388 | - 2 * this.attr_("axisTickSize"); | |
389 | this.clippingArea_ = clip; | |
390 | ||
b0c3b730 | 391 | // Create the canvas for interactive parts of the chart. |
f8cfec73 | 392 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 DV |
393 | this.canvas_.style.position = "absolute"; |
394 | this.canvas_.width = this.width_; | |
395 | this.canvas_.height = this.height_; | |
f8cfec73 DV |
396 | this.canvas_.style.width = this.width_ + "px"; // for IE |
397 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
b0c3b730 DV |
398 | |
399 | // ... and for static parts of the chart. | |
6a1aa64f | 400 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
76171648 | 401 | |
eb7bf005 EC |
402 | // The interactive parts of the graph are drawn on top of the chart. |
403 | this.graphDiv.appendChild(this.hidden_); | |
404 | this.graphDiv.appendChild(this.canvas_); | |
405 | this.mouseEventElement_ = this.canvas_; | |
406 | ||
4c47502d DV |
407 | // Make sure we don't overdraw. |
408 | Dygraph.clipCanvas_(this.hidden_, this.clippingArea_); | |
409 | Dygraph.clipCanvas_(this.canvas_, this.clippingArea_); | |
410 | ||
76171648 | 411 | var dygraph = this; |
eb7bf005 | 412 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(e) { |
76171648 DV |
413 | dygraph.mouseMove_(e); |
414 | }); | |
eb7bf005 | 415 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(e) { |
76171648 DV |
416 | dygraph.mouseOut_(e); |
417 | }); | |
697e70b2 DV |
418 | |
419 | // Create the grapher | |
420 | // TODO(danvk): why does the Layout need its own set of options? | |
421 | this.layoutOptions_ = { 'xOriginIsZero': false }; | |
422 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
423 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
424 | Dygraph.update(this.layoutOptions_, { | |
425 | 'errorBars': (this.attr_("errorBars") || this.attr_("customBars")) }); | |
426 | ||
427 | this.layout_ = new DygraphLayout(this, this.layoutOptions_); | |
428 | ||
429 | // TODO(danvk): why does the Renderer need its own set of options? | |
430 | this.renderOptions_ = { colorScheme: this.colors_, | |
431 | strokeColor: null, | |
432 | axisLineWidth: Dygraph.AXIS_LINE_WIDTH }; | |
433 | Dygraph.update(this.renderOptions_, this.attrs_); | |
434 | Dygraph.update(this.renderOptions_, this.user_attrs_); | |
435 | this.plotter_ = new DygraphCanvasRenderer(this, | |
436 | this.hidden_, this.layout_, | |
437 | this.renderOptions_); | |
438 | ||
439 | this.createStatusMessage_(); | |
440 | this.createRollInterface_(); | |
441 | this.createDragInterface_(); | |
4cfcc38c DV |
442 | }; |
443 | ||
444 | /** | |
445 | * Detach DOM elements in the dygraph and null out all data references. | |
446 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
447 | * usage. See, e.g., the tests/perf.html example. | |
448 | */ | |
449 | Dygraph.prototype.destroy = function() { | |
450 | var removeRecursive = function(node) { | |
451 | while (node.hasChildNodes()) { | |
452 | removeRecursive(node.firstChild); | |
453 | node.removeChild(node.firstChild); | |
454 | } | |
455 | }; | |
456 | removeRecursive(this.maindiv_); | |
457 | ||
458 | var nullOut = function(obj) { | |
459 | for (var n in obj) { | |
460 | if (typeof(obj[n]) === 'object') { | |
461 | obj[n] = null; | |
462 | } | |
463 | } | |
464 | }; | |
465 | ||
466 | // These may not all be necessary, but it can't hurt... | |
467 | nullOut(this.layout_); | |
468 | nullOut(this.plotter_); | |
469 | nullOut(this); | |
470 | }; | |
6a1aa64f DV |
471 | |
472 | /** | |
473 | * Creates the canvas containing the PlotKit graph. Only plotkit ever draws on | |
285a6bda | 474 | * this particular canvas. All Dygraph work is done on this.canvas_. |
8846615a | 475 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
476 | * @return {Object} The newly-created canvas |
477 | * @private | |
478 | */ | |
285a6bda | 479 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 | 480 | var h = Dygraph.createCanvas(); |
6a1aa64f | 481 | h.style.position = "absolute"; |
9ac5e4ae DV |
482 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
483 | // some extra area to make it easier to zoom in on the far left and far | |
484 | // right. h needs to be precisely the plot area, so that clipping occurs. | |
6a1aa64f DV |
485 | h.style.top = canvas.style.top; |
486 | h.style.left = canvas.style.left; | |
487 | h.width = this.width_; | |
488 | h.height = this.height_; | |
f8cfec73 DV |
489 | h.style.width = this.width_ + "px"; // for IE |
490 | h.style.height = this.height_ + "px"; // for IE | |
6a1aa64f DV |
491 | return h; |
492 | }; | |
493 | ||
f474c2a3 DV |
494 | // Taken from MochiKit.Color |
495 | Dygraph.hsvToRGB = function (hue, saturation, value) { | |
496 | var red; | |
497 | var green; | |
498 | var blue; | |
499 | if (saturation === 0) { | |
500 | red = value; | |
501 | green = value; | |
502 | blue = value; | |
503 | } else { | |
504 | var i = Math.floor(hue * 6); | |
505 | var f = (hue * 6) - i; | |
506 | var p = value * (1 - saturation); | |
507 | var q = value * (1 - (saturation * f)); | |
508 | var t = value * (1 - (saturation * (1 - f))); | |
509 | switch (i) { | |
510 | case 1: red = q; green = value; blue = p; break; | |
511 | case 2: red = p; green = value; blue = t; break; | |
512 | case 3: red = p; green = q; blue = value; break; | |
513 | case 4: red = t; green = p; blue = value; break; | |
514 | case 5: red = value; green = p; blue = q; break; | |
515 | case 6: // fall through | |
516 | case 0: red = value; green = t; blue = p; break; | |
517 | } | |
518 | } | |
519 | red = Math.floor(255 * red + 0.5); | |
520 | green = Math.floor(255 * green + 0.5); | |
521 | blue = Math.floor(255 * blue + 0.5); | |
522 | return 'rgb(' + red + ',' + green + ',' + blue + ')'; | |
523 | }; | |
524 | ||
525 | ||
6a1aa64f DV |
526 | /** |
527 | * Generate a set of distinct colors for the data series. This is done with a | |
528 | * color wheel. Saturation/Value are customizable, and the hue is | |
529 | * equally-spaced around the color wheel. If a custom set of colors is | |
530 | * specified, that is used instead. | |
6a1aa64f DV |
531 | * @private |
532 | */ | |
285a6bda DV |
533 | Dygraph.prototype.setColors_ = function() { |
534 | // TODO(danvk): compute this directly into this.attrs_['colorScheme'] and do | |
535 | // away with this.renderOptions_. | |
536 | var num = this.attr_("labels").length - 1; | |
6a1aa64f | 537 | this.colors_ = []; |
285a6bda DV |
538 | var colors = this.attr_('colors'); |
539 | if (!colors) { | |
540 | var sat = this.attr_('colorSaturation') || 1.0; | |
541 | var val = this.attr_('colorValue') || 0.5; | |
2aa21213 | 542 | var half = Math.ceil(num / 2); |
6a1aa64f | 543 | for (var i = 1; i <= num; i++) { |
ec1959eb | 544 | if (!this.visibility()[i-1]) continue; |
43af96e7 | 545 | // alternate colors for high contrast. |
2aa21213 | 546 | var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2); |
43af96e7 NK |
547 | var hue = (1.0 * idx/ (1 + num)); |
548 | this.colors_.push(Dygraph.hsvToRGB(hue, sat, val)); | |
6a1aa64f DV |
549 | } |
550 | } else { | |
551 | for (var i = 0; i < num; i++) { | |
ec1959eb | 552 | if (!this.visibility()[i]) continue; |
285a6bda | 553 | var colorStr = colors[i % colors.length]; |
f474c2a3 | 554 | this.colors_.push(colorStr); |
6a1aa64f DV |
555 | } |
556 | } | |
285a6bda | 557 | |
c21d2c2d | 558 | // TODO(danvk): update this w/r/t/ the new options system. |
285a6bda | 559 | this.renderOptions_.colorScheme = this.colors_; |
fc80a396 DV |
560 | Dygraph.update(this.plotter_.options, this.renderOptions_); |
561 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
562 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
6a1aa64f DV |
563 | } |
564 | ||
43af96e7 NK |
565 | /** |
566 | * Return the list of colors. This is either the list of colors passed in the | |
567 | * attributes, or the autogenerated list of rgb(r,g,b) strings. | |
568 | * @return {Array<string>} The list of colors. | |
569 | */ | |
570 | Dygraph.prototype.getColors = function() { | |
571 | return this.colors_; | |
572 | }; | |
573 | ||
5e60386d DV |
574 | // The following functions are from quirksmode.org with a modification for Safari from |
575 | // http://blog.firetree.net/2005/07/04/javascript-find-position/ | |
3df0ccf0 DV |
576 | // http://www.quirksmode.org/js/findpos.html |
577 | Dygraph.findPosX = function(obj) { | |
578 | var curleft = 0; | |
5e60386d | 579 | if(obj.offsetParent) |
50360fd0 | 580 | while(1) |
5e60386d | 581 | { |
3df0ccf0 | 582 | curleft += obj.offsetLeft; |
5e60386d DV |
583 | if(!obj.offsetParent) |
584 | break; | |
3df0ccf0 DV |
585 | obj = obj.offsetParent; |
586 | } | |
5e60386d | 587 | else if(obj.x) |
3df0ccf0 DV |
588 | curleft += obj.x; |
589 | return curleft; | |
590 | }; | |
c21d2c2d | 591 | |
3df0ccf0 DV |
592 | Dygraph.findPosY = function(obj) { |
593 | var curtop = 0; | |
5e60386d DV |
594 | if(obj.offsetParent) |
595 | while(1) | |
596 | { | |
3df0ccf0 | 597 | curtop += obj.offsetTop; |
5e60386d DV |
598 | if(!obj.offsetParent) |
599 | break; | |
3df0ccf0 DV |
600 | obj = obj.offsetParent; |
601 | } | |
5e60386d | 602 | else if(obj.y) |
3df0ccf0 DV |
603 | curtop += obj.y; |
604 | return curtop; | |
605 | }; | |
606 | ||
5e60386d | 607 | |
71a11a8e | 608 | |
6a1aa64f DV |
609 | /** |
610 | * Create the div that contains information on the selected point(s) | |
611 | * This goes in the top right of the canvas, unless an external div has already | |
612 | * been specified. | |
613 | * @private | |
614 | */ | |
fedbd797 | 615 | Dygraph.prototype.createStatusMessage_ = function() { |
616 | var userLabelsDiv = this.user_attrs_["labelsDiv"]; | |
617 | if (userLabelsDiv && null != userLabelsDiv | |
618 | && (typeof(userLabelsDiv) == "string" || userLabelsDiv instanceof String)) { | |
619 | this.user_attrs_["labelsDiv"] = document.getElementById(userLabelsDiv); | |
620 | } | |
285a6bda DV |
621 | if (!this.attr_("labelsDiv")) { |
622 | var divWidth = this.attr_('labelsDivWidth'); | |
b0c3b730 | 623 | var messagestyle = { |
6a1aa64f DV |
624 | "position": "absolute", |
625 | "fontSize": "14px", | |
626 | "zIndex": 10, | |
627 | "width": divWidth + "px", | |
628 | "top": "0px", | |
8846615a | 629 | "left": (this.width_ - divWidth - 2) + "px", |
6a1aa64f DV |
630 | "background": "white", |
631 | "textAlign": "left", | |
b0c3b730 | 632 | "overflow": "hidden"}; |
fc80a396 | 633 | Dygraph.update(messagestyle, this.attr_('labelsDivStyles')); |
b0c3b730 DV |
634 | var div = document.createElement("div"); |
635 | for (var name in messagestyle) { | |
85b99f0b DV |
636 | if (messagestyle.hasOwnProperty(name)) { |
637 | div.style[name] = messagestyle[name]; | |
638 | } | |
b0c3b730 DV |
639 | } |
640 | this.graphDiv.appendChild(div); | |
285a6bda | 641 | this.attrs_.labelsDiv = div; |
6a1aa64f DV |
642 | } |
643 | }; | |
644 | ||
645 | /** | |
646 | * Create the text box to adjust the averaging period | |
647 | * @return {Object} The newly-created text box | |
648 | * @private | |
649 | */ | |
285a6bda | 650 | Dygraph.prototype.createRollInterface_ = function() { |
285a6bda | 651 | var display = this.attr_('showRoller') ? "block" : "none"; |
b0c3b730 DV |
652 | var textAttr = { "position": "absolute", |
653 | "zIndex": 10, | |
654 | "top": (this.plotter_.area.h - 25) + "px", | |
655 | "left": (this.plotter_.area.x + 1) + "px", | |
656 | "display": display | |
6a1aa64f | 657 | }; |
b0c3b730 DV |
658 | var roller = document.createElement("input"); |
659 | roller.type = "text"; | |
660 | roller.size = "2"; | |
661 | roller.value = this.rollPeriod_; | |
662 | for (var name in textAttr) { | |
85b99f0b DV |
663 | if (textAttr.hasOwnProperty(name)) { |
664 | roller.style[name] = textAttr[name]; | |
665 | } | |
b0c3b730 DV |
666 | } |
667 | ||
6a1aa64f | 668 | var pa = this.graphDiv; |
b0c3b730 | 669 | pa.appendChild(roller); |
76171648 DV |
670 | var dygraph = this; |
671 | roller.onchange = function() { dygraph.adjustRoll(roller.value); }; | |
6a1aa64f | 672 | return roller; |
76171648 DV |
673 | }; |
674 | ||
675 | // These functions are taken from MochiKit.Signal | |
676 | Dygraph.pageX = function(e) { | |
677 | if (e.pageX) { | |
678 | return (!e.pageX || e.pageX < 0) ? 0 : e.pageX; | |
679 | } else { | |
680 | var de = document; | |
681 | var b = document.body; | |
682 | return e.clientX + | |
683 | (de.scrollLeft || b.scrollLeft) - | |
684 | (de.clientLeft || 0); | |
685 | } | |
686 | }; | |
687 | ||
688 | Dygraph.pageY = function(e) { | |
689 | if (e.pageY) { | |
690 | return (!e.pageY || e.pageY < 0) ? 0 : e.pageY; | |
691 | } else { | |
692 | var de = document; | |
693 | var b = document.body; | |
694 | return e.clientY + | |
695 | (de.scrollTop || b.scrollTop) - | |
696 | (de.clientTop || 0); | |
697 | } | |
698 | }; | |
6a1aa64f DV |
699 | |
700 | /** | |
701 | * Set up all the mouse handlers needed to capture dragging behavior for zoom | |
27385109 | 702 | * events. |
6a1aa64f DV |
703 | * @private |
704 | */ | |
285a6bda | 705 | Dygraph.prototype.createDragInterface_ = function() { |
6a1aa64f DV |
706 | var self = this; |
707 | ||
708 | // Tracks whether the mouse is down right now | |
bce01b0f | 709 | var isZooming = false; |
c776c216 | 710 | var isPanning = false; |
6a1aa64f DV |
711 | var dragStartX = null; |
712 | var dragStartY = null; | |
713 | var dragEndX = null; | |
714 | var dragEndY = null; | |
715 | var prevEndX = null; | |
bce01b0f DV |
716 | var draggingDate = null; |
717 | var dateRange = null; | |
6a1aa64f DV |
718 | |
719 | // Utility function to convert page-wide coordinates to canvas coords | |
67e650dc DV |
720 | var px = 0; |
721 | var py = 0; | |
76171648 DV |
722 | var getX = function(e) { return Dygraph.pageX(e) - px }; |
723 | var getY = function(e) { return Dygraph.pageX(e) - py }; | |
6a1aa64f DV |
724 | |
725 | // Draw zoom rectangles when the mouse is down and the user moves around | |
eb7bf005 | 726 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(event) { |
bce01b0f | 727 | if (isZooming) { |
6a1aa64f DV |
728 | dragEndX = getX(event); |
729 | dragEndY = getY(event); | |
730 | ||
731 | self.drawZoomRect_(dragStartX, dragEndX, prevEndX); | |
732 | prevEndX = dragEndX; | |
bce01b0f DV |
733 | } else if (isPanning) { |
734 | dragEndX = getX(event); | |
735 | dragEndY = getY(event); | |
736 | ||
737 | // Want to have it so that: | |
738 | // 1. draggingDate appears at dragEndX | |
739 | // 2. daterange = (dateWindow_[1] - dateWindow_[0]) is unaltered. | |
740 | ||
741 | self.dateWindow_[0] = draggingDate - (dragEndX / self.width_) * dateRange; | |
742 | self.dateWindow_[1] = self.dateWindow_[0] + dateRange; | |
743 | self.drawGraph_(self.rawData_); | |
6a1aa64f DV |
744 | } |
745 | }); | |
746 | ||
747 | // Track the beginning of drag events | |
eb7bf005 | 748 | Dygraph.addEvent(this.mouseEventElement_, 'mousedown', function(event) { |
3df0ccf0 DV |
749 | px = Dygraph.findPosX(self.canvas_); |
750 | py = Dygraph.findPosY(self.canvas_); | |
6a1aa64f DV |
751 | dragStartX = getX(event); |
752 | dragStartY = getY(event); | |
bce01b0f | 753 | |
2dab69c3 | 754 | if (event.altKey || event.shiftKey) { |
d12999d3 | 755 | if (!self.dateWindow_) return; // have to be zoomed in to pan. |
bce01b0f DV |
756 | isPanning = true; |
757 | dateRange = self.dateWindow_[1] - self.dateWindow_[0]; | |
d12999d3 DV |
758 | draggingDate = (dragStartX / self.width_) * dateRange + |
759 | self.dateWindow_[0]; | |
bce01b0f DV |
760 | } else { |
761 | isZooming = true; | |
762 | } | |
6a1aa64f DV |
763 | }); |
764 | ||
765 | // If the user releases the mouse button during a drag, but not over the | |
766 | // canvas, then it doesn't count as a zooming action. | |
76171648 | 767 | Dygraph.addEvent(document, 'mouseup', function(event) { |
bce01b0f DV |
768 | if (isZooming || isPanning) { |
769 | isZooming = false; | |
6a1aa64f DV |
770 | dragStartX = null; |
771 | dragStartY = null; | |
772 | } | |
bce01b0f DV |
773 | |
774 | if (isPanning) { | |
775 | isPanning = false; | |
776 | draggingDate = null; | |
777 | dateRange = null; | |
778 | } | |
6a1aa64f DV |
779 | }); |
780 | ||
781 | // Temporarily cancel the dragging event when the mouse leaves the graph | |
eb7bf005 | 782 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(event) { |
bce01b0f | 783 | if (isZooming) { |
6a1aa64f DV |
784 | dragEndX = null; |
785 | dragEndY = null; | |
786 | } | |
787 | }); | |
788 | ||
789 | // If the mouse is released on the canvas during a drag event, then it's a | |
790 | // zoom. Only do the zoom if it's over a large enough area (>= 10 pixels) | |
eb7bf005 | 791 | Dygraph.addEvent(this.mouseEventElement_, 'mouseup', function(event) { |
bce01b0f DV |
792 | if (isZooming) { |
793 | isZooming = false; | |
6a1aa64f DV |
794 | dragEndX = getX(event); |
795 | dragEndY = getY(event); | |
796 | var regionWidth = Math.abs(dragEndX - dragStartX); | |
797 | var regionHeight = Math.abs(dragEndY - dragStartY); | |
798 | ||
799 | if (regionWidth < 2 && regionHeight < 2 && | |
285a6bda | 800 | self.attr_('clickCallback') != null && |
6a1aa64f | 801 | self.lastx_ != undefined) { |
b258a3da DV |
802 | // TODO(danvk): pass along more info about the points. |
803 | self.attr_('clickCallback')(event, self.lastx_, self.selPoints_); | |
6a1aa64f DV |
804 | } |
805 | ||
806 | if (regionWidth >= 10) { | |
807 | self.doZoom_(Math.min(dragStartX, dragEndX), | |
808 | Math.max(dragStartX, dragEndX)); | |
809 | } else { | |
810 | self.canvas_.getContext("2d").clearRect(0, 0, | |
811 | self.canvas_.width, | |
812 | self.canvas_.height); | |
813 | } | |
814 | ||
815 | dragStartX = null; | |
816 | dragStartY = null; | |
817 | } | |
bce01b0f DV |
818 | |
819 | if (isPanning) { | |
820 | isPanning = false; | |
821 | draggingDate = null; | |
822 | dateRange = null; | |
823 | } | |
6a1aa64f DV |
824 | }); |
825 | ||
826 | // Double-clicking zooms back out | |
eb7bf005 | 827 | Dygraph.addEvent(this.mouseEventElement_, 'dblclick', function(event) { |
b258a3da | 828 | if (self.dateWindow_ == null) return; |
6a1aa64f DV |
829 | self.dateWindow_ = null; |
830 | self.drawGraph_(self.rawData_); | |
831 | var minDate = self.rawData_[0][0]; | |
832 | var maxDate = self.rawData_[self.rawData_.length - 1][0]; | |
285a6bda DV |
833 | if (self.attr_("zoomCallback")) { |
834 | self.attr_("zoomCallback")(minDate, maxDate); | |
67e650dc | 835 | } |
6a1aa64f DV |
836 | }); |
837 | }; | |
838 | ||
839 | /** | |
840 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
841 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
842 | * avoid extra redrawing, but it's tricky to avoid interactions with the status | |
843 | * dots. | |
844 | * @param {Number} startX The X position where the drag started, in canvas | |
845 | * coordinates. | |
846 | * @param {Number} endX The current X position of the drag, in canvas coords. | |
847 | * @param {Number} prevEndX The value of endX on the previous call to this | |
848 | * function. Used to avoid excess redrawing | |
849 | * @private | |
850 | */ | |
285a6bda | 851 | Dygraph.prototype.drawZoomRect_ = function(startX, endX, prevEndX) { |
6a1aa64f DV |
852 | var ctx = this.canvas_.getContext("2d"); |
853 | ||
854 | // Clean up from the previous rect if necessary | |
855 | if (prevEndX) { | |
856 | ctx.clearRect(Math.min(startX, prevEndX), 0, | |
857 | Math.abs(startX - prevEndX), this.height_); | |
858 | } | |
859 | ||
860 | // Draw a light-grey rectangle to show the new viewing area | |
861 | if (endX && startX) { | |
862 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
863 | ctx.fillRect(Math.min(startX, endX), 0, | |
864 | Math.abs(endX - startX), this.height_); | |
865 | } | |
866 | }; | |
867 | ||
868 | /** | |
869 | * Zoom to something containing [lowX, highX]. These are pixel coordinates | |
870 | * in the canvas. The exact zoom window may be slightly larger if there are no | |
871 | * data points near lowX or highX. This function redraws the graph. | |
872 | * @param {Number} lowX The leftmost pixel value that should be visible. | |
873 | * @param {Number} highX The rightmost pixel value that should be visible. | |
874 | * @private | |
875 | */ | |
285a6bda | 876 | Dygraph.prototype.doZoom_ = function(lowX, highX) { |
6a1aa64f | 877 | // Find the earliest and latest dates contained in this canvasx range. |
56623f3b DV |
878 | var r = this.toDataCoords(lowX, null); |
879 | var minDate = r[0]; | |
880 | r = this.toDataCoords(highX, null); | |
881 | var maxDate = r[0]; | |
6a1aa64f DV |
882 | |
883 | this.dateWindow_ = [minDate, maxDate]; | |
884 | this.drawGraph_(this.rawData_); | |
285a6bda DV |
885 | if (this.attr_("zoomCallback")) { |
886 | this.attr_("zoomCallback")(minDate, maxDate); | |
67e650dc | 887 | } |
6a1aa64f DV |
888 | }; |
889 | ||
890 | /** | |
891 | * When the mouse moves in the canvas, display information about a nearby data | |
892 | * point and draw dots over those points in the data series. This function | |
893 | * takes care of cleanup of previously-drawn dots. | |
894 | * @param {Object} event The mousemove event from the browser. | |
895 | * @private | |
896 | */ | |
285a6bda | 897 | Dygraph.prototype.mouseMove_ = function(event) { |
eb7bf005 | 898 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_); |
6a1aa64f DV |
899 | var points = this.layout_.points; |
900 | ||
901 | var lastx = -1; | |
902 | var lasty = -1; | |
903 | ||
904 | // Loop through all the points and find the date nearest to our current | |
905 | // location. | |
906 | var minDist = 1e+100; | |
907 | var idx = -1; | |
908 | for (var i = 0; i < points.length; i++) { | |
909 | var dist = Math.abs(points[i].canvasx - canvasx); | |
f032c51d | 910 | if (dist > minDist) continue; |
6a1aa64f DV |
911 | minDist = dist; |
912 | idx = i; | |
913 | } | |
914 | if (idx >= 0) lastx = points[idx].xval; | |
915 | // Check that you can really highlight the last day's data | |
916 | if (canvasx > points[points.length-1].canvasx) | |
917 | lastx = points[points.length-1].xval; | |
918 | ||
919 | // Extract the points we've selected | |
b258a3da | 920 | this.selPoints_ = []; |
50360fd0 | 921 | var l = points.length; |
416b05ad NK |
922 | if (!this.attr_("stackedGraph")) { |
923 | for (var i = 0; i < l; i++) { | |
924 | if (points[i].xval == lastx) { | |
925 | this.selPoints_.push(points[i]); | |
926 | } | |
927 | } | |
928 | } else { | |
354e15ab DE |
929 | // Need to 'unstack' points starting from the bottom |
930 | var cumulative_sum = 0; | |
416b05ad NK |
931 | for (var i = l - 1; i >= 0; i--) { |
932 | if (points[i].xval == lastx) { | |
354e15ab | 933 | var p = {}; // Clone the point since we modify it |
d4139cd8 NK |
934 | for (var k in points[i]) { |
935 | p[k] = points[i][k]; | |
50360fd0 NK |
936 | } |
937 | p.yval -= cumulative_sum; | |
938 | cumulative_sum += p.yval; | |
d4139cd8 | 939 | this.selPoints_.push(p); |
12e4c741 | 940 | } |
6a1aa64f | 941 | } |
354e15ab | 942 | this.selPoints_.reverse(); |
6a1aa64f DV |
943 | } |
944 | ||
b258a3da | 945 | if (this.attr_("highlightCallback")) { |
a4c6a67c | 946 | var px = this.lastx_; |
dd082dda | 947 | if (px !== null && lastx != px) { |
344ba8c0 | 948 | // only fire if the selected point has changed. |
50360fd0 | 949 | this.attr_("highlightCallback")(event, lastx, this.selPoints_); |
43af96e7 | 950 | } |
12e4c741 | 951 | } |
43af96e7 | 952 | |
239c712d NAG |
953 | // Save last x position for callbacks. |
954 | this.lastx_ = lastx; | |
50360fd0 | 955 | |
239c712d NAG |
956 | this.updateSelection_(); |
957 | }; | |
b258a3da | 958 | |
239c712d NAG |
959 | /** |
960 | * Draw dots over the selectied points in the data series. This function | |
961 | * takes care of cleanup of previously-drawn dots. | |
962 | * @private | |
963 | */ | |
964 | Dygraph.prototype.updateSelection_ = function() { | |
6a1aa64f | 965 | // Clear the previously drawn vertical, if there is one |
285a6bda | 966 | var circleSize = this.attr_('highlightCircleSize'); |
6a1aa64f DV |
967 | var ctx = this.canvas_.getContext("2d"); |
968 | if (this.previousVerticalX_ >= 0) { | |
969 | var px = this.previousVerticalX_; | |
970 | ctx.clearRect(px - circleSize - 1, 0, 2 * circleSize + 2, this.height_); | |
971 | } | |
972 | ||
584ceeaa DV |
973 | var isOK = function(x) { return x && !isNaN(x); }; |
974 | ||
d160cc3b | 975 | if (this.selPoints_.length > 0) { |
b258a3da | 976 | var canvasx = this.selPoints_[0].canvasx; |
6a1aa64f DV |
977 | |
978 | // Set the status message to indicate the selected point(s) | |
239c712d | 979 | var replace = this.attr_('xValueFormatter')(this.lastx_, this) + ":"; |
50360fd0 | 980 | var fmtFunc = this.attr_('yValueFormatter'); |
6a1aa64f | 981 | var clen = this.colors_.length; |
d160cc3b NK |
982 | |
983 | if (this.attr_('showLabelsOnHighlight')) { | |
984 | // Set the status message to indicate the selected point(s) | |
d160cc3b NK |
985 | for (var i = 0; i < this.selPoints_.length; i++) { |
986 | if (!isOK(this.selPoints_[i].canvasy)) continue; | |
987 | if (this.attr_("labelsSeparateLines")) { | |
988 | replace += "<br/>"; | |
989 | } | |
990 | var point = this.selPoints_[i]; | |
991 | var c = new RGBColor(this.colors_[i%clen]); | |
029da4b6 | 992 | var yval = fmtFunc(point.yval); |
d160cc3b NK |
993 | replace += " <b><font color='" + c.toHex() + "'>" |
994 | + point.name + "</font></b>:" | |
995 | + yval; | |
6a1aa64f | 996 | } |
50360fd0 | 997 | |
d160cc3b | 998 | this.attr_("labelsDiv").innerHTML = replace; |
6a1aa64f | 999 | } |
6a1aa64f | 1000 | |
6a1aa64f | 1001 | // Draw colored circles over the center of each selected point |
43af96e7 | 1002 | ctx.save(); |
b258a3da | 1003 | for (var i = 0; i < this.selPoints_.length; i++) { |
f032c51d | 1004 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
6a1aa64f | 1005 | ctx.beginPath(); |
563c70ca | 1006 | ctx.fillStyle = this.plotter_.colors[this.selPoints_[i].name]; |
f032c51d | 1007 | ctx.arc(canvasx, this.selPoints_[i].canvasy, circleSize, |
7bf6a9fe | 1008 | 0, 2 * Math.PI, false); |
6a1aa64f DV |
1009 | ctx.fill(); |
1010 | } | |
1011 | ctx.restore(); | |
1012 | ||
1013 | this.previousVerticalX_ = canvasx; | |
1014 | } | |
1015 | }; | |
1016 | ||
1017 | /** | |
239c712d NAG |
1018 | * Set manually set selected dots, and display information about them |
1019 | * @param int row number that should by highlighted | |
1020 | * false value clears the selection | |
1021 | * @public | |
1022 | */ | |
1023 | Dygraph.prototype.setSelection = function(row) { | |
1024 | // Extract the points we've selected | |
1025 | this.selPoints_ = []; | |
1026 | var pos = 0; | |
50360fd0 | 1027 | |
239c712d | 1028 | if (row !== false) { |
16269f6e NAG |
1029 | row = row-this.boundaryIds_[0][0]; |
1030 | } | |
50360fd0 | 1031 | |
16269f6e | 1032 | if (row !== false && row >= 0) { |
239c712d | 1033 | for (var i in this.layout_.datasets) { |
16269f6e NAG |
1034 | if (row < this.layout_.datasets[i].length) { |
1035 | this.selPoints_.push(this.layout_.points[pos+row]); | |
1036 | } | |
239c712d NAG |
1037 | pos += this.layout_.datasets[i].length; |
1038 | } | |
16269f6e | 1039 | } |
50360fd0 | 1040 | |
16269f6e | 1041 | if (this.selPoints_.length) { |
239c712d NAG |
1042 | this.lastx_ = this.selPoints_[0].xval; |
1043 | this.updateSelection_(); | |
1044 | } else { | |
1045 | this.lastx_ = -1; | |
1046 | this.clearSelection(); | |
1047 | } | |
1048 | ||
1049 | }; | |
1050 | ||
1051 | /** | |
6a1aa64f DV |
1052 | * The mouse has left the canvas. Clear out whatever artifacts remain |
1053 | * @param {Object} event the mouseout event from the browser. | |
1054 | * @private | |
1055 | */ | |
285a6bda | 1056 | Dygraph.prototype.mouseOut_ = function(event) { |
a4c6a67c AV |
1057 | if (this.attr_("unhighlightCallback")) { |
1058 | this.attr_("unhighlightCallback")(event); | |
1059 | } | |
1060 | ||
43af96e7 | 1061 | if (this.attr_("hideOverlayOnMouseOut")) { |
239c712d | 1062 | this.clearSelection(); |
43af96e7 | 1063 | } |
6a1aa64f DV |
1064 | }; |
1065 | ||
239c712d NAG |
1066 | /** |
1067 | * Remove all selection from the canvas | |
1068 | * @public | |
1069 | */ | |
1070 | Dygraph.prototype.clearSelection = function() { | |
1071 | // Get rid of the overlay data | |
1072 | var ctx = this.canvas_.getContext("2d"); | |
1073 | ctx.clearRect(0, 0, this.width_, this.height_); | |
1074 | this.attr_("labelsDiv").innerHTML = ""; | |
1075 | this.selPoints_ = []; | |
1076 | this.lastx_ = -1; | |
1077 | } | |
1078 | ||
103b7292 NAG |
1079 | /** |
1080 | * Returns the number of the currently selected row | |
1081 | * @return int row number, of -1 if nothing is selected | |
1082 | * @public | |
1083 | */ | |
1084 | Dygraph.prototype.getSelection = function() { | |
1085 | if (!this.selPoints_ || this.selPoints_.length < 1) { | |
1086 | return -1; | |
1087 | } | |
50360fd0 | 1088 | |
103b7292 NAG |
1089 | for (var row=0; row<this.layout_.points.length; row++ ) { |
1090 | if (this.layout_.points[row].x == this.selPoints_[0].x) { | |
16269f6e | 1091 | return row + this.boundaryIds_[0][0]; |
103b7292 NAG |
1092 | } |
1093 | } | |
1094 | return -1; | |
1095 | } | |
1096 | ||
285a6bda | 1097 | Dygraph.zeropad = function(x) { |
32988383 DV |
1098 | if (x < 10) return "0" + x; else return "" + x; |
1099 | } | |
1100 | ||
6a1aa64f | 1101 | /** |
6b8e33dd DV |
1102 | * Return a string version of the hours, minutes and seconds portion of a date. |
1103 | * @param {Number} date The JavaScript date (ms since epoch) | |
1104 | * @return {String} A time of the form "HH:MM:SS" | |
1105 | * @private | |
1106 | */ | |
bf640e56 | 1107 | Dygraph.hmsString_ = function(date) { |
285a6bda | 1108 | var zeropad = Dygraph.zeropad; |
6b8e33dd DV |
1109 | var d = new Date(date); |
1110 | if (d.getSeconds()) { | |
1111 | return zeropad(d.getHours()) + ":" + | |
1112 | zeropad(d.getMinutes()) + ":" + | |
1113 | zeropad(d.getSeconds()); | |
6b8e33dd | 1114 | } else { |
054531ca | 1115 | return zeropad(d.getHours()) + ":" + zeropad(d.getMinutes()); |
6b8e33dd DV |
1116 | } |
1117 | } | |
1118 | ||
1119 | /** | |
bf640e56 AV |
1120 | * Convert a JS date to a string appropriate to display on an axis that |
1121 | * is displaying values at the stated granularity. | |
1122 | * @param {Date} date The date to format | |
1123 | * @param {Number} granularity One of the Dygraph granularity constants | |
1124 | * @return {String} The formatted date | |
1125 | * @private | |
1126 | */ | |
1127 | Dygraph.dateAxisFormatter = function(date, granularity) { | |
1128 | if (granularity >= Dygraph.MONTHLY) { | |
1129 | return date.strftime('%b %y'); | |
1130 | } else { | |
31eddad3 | 1131 | var frac = date.getHours() * 3600 + date.getMinutes() * 60 + date.getSeconds() + date.getMilliseconds(); |
bf640e56 AV |
1132 | if (frac == 0 || granularity >= Dygraph.DAILY) { |
1133 | return new Date(date.getTime() + 3600*1000).strftime('%d%b'); | |
1134 | } else { | |
1135 | return Dygraph.hmsString_(date.getTime()); | |
1136 | } | |
1137 | } | |
1138 | } | |
1139 | ||
1140 | /** | |
6a1aa64f DV |
1141 | * Convert a JS date (millis since epoch) to YYYY/MM/DD |
1142 | * @param {Number} date The JavaScript date (ms since epoch) | |
1143 | * @return {String} A date of the form "YYYY/MM/DD" | |
1144 | * @private | |
1145 | */ | |
285a6bda DV |
1146 | Dygraph.dateString_ = function(date, self) { |
1147 | var zeropad = Dygraph.zeropad; | |
6a1aa64f DV |
1148 | var d = new Date(date); |
1149 | ||
1150 | // Get the year: | |
1151 | var year = "" + d.getFullYear(); | |
1152 | // Get a 0 padded month string | |
6b8e33dd | 1153 | var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh |
6a1aa64f | 1154 | // Get a 0 padded day string |
6b8e33dd | 1155 | var day = zeropad(d.getDate()); |
6a1aa64f | 1156 | |
6b8e33dd DV |
1157 | var ret = ""; |
1158 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); | |
bf640e56 | 1159 | if (frac) ret = " " + Dygraph.hmsString_(date); |
6b8e33dd DV |
1160 | |
1161 | return year + "/" + month + "/" + day + ret; | |
6a1aa64f DV |
1162 | }; |
1163 | ||
1164 | /** | |
1165 | * Round a number to the specified number of digits past the decimal point. | |
1166 | * @param {Number} num The number to round | |
1167 | * @param {Number} places The number of decimals to which to round | |
1168 | * @return {Number} The rounded number | |
1169 | * @private | |
1170 | */ | |
029da4b6 | 1171 | Dygraph.round_ = function(num, places) { |
6a1aa64f DV |
1172 | var shift = Math.pow(10, places); |
1173 | return Math.round(num * shift)/shift; | |
1174 | }; | |
1175 | ||
1176 | /** | |
1177 | * Fires when there's data available to be graphed. | |
1178 | * @param {String} data Raw CSV data to be plotted | |
1179 | * @private | |
1180 | */ | |
285a6bda | 1181 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f DV |
1182 | this.rawData_ = this.parseCSV_(data); |
1183 | this.drawGraph_(this.rawData_); | |
1184 | }; | |
1185 | ||
285a6bda | 1186 | Dygraph.prototype.months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", |
8846615a | 1187 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]; |
285a6bda | 1188 | Dygraph.prototype.quarters = ["Jan", "Apr", "Jul", "Oct"]; |
6a1aa64f DV |
1189 | |
1190 | /** | |
1191 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
1192 | * @private | |
1193 | */ | |
285a6bda | 1194 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f DV |
1195 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
1196 | var startDate, endDate; | |
1197 | if (this.dateWindow_) { | |
1198 | startDate = this.dateWindow_[0]; | |
1199 | endDate = this.dateWindow_[1]; | |
1200 | } else { | |
1201 | startDate = this.rawData_[0][0]; | |
1202 | endDate = this.rawData_[this.rawData_.length - 1][0]; | |
1203 | } | |
1204 | ||
285a6bda | 1205 | var xTicks = this.attr_('xTicker')(startDate, endDate, this); |
6a1aa64f | 1206 | this.layout_.updateOptions({xTicks: xTicks}); |
32988383 DV |
1207 | }; |
1208 | ||
1209 | // Time granularity enumeration | |
285a6bda | 1210 | Dygraph.SECONDLY = 0; |
20a41c17 DV |
1211 | Dygraph.TWO_SECONDLY = 1; |
1212 | Dygraph.FIVE_SECONDLY = 2; | |
1213 | Dygraph.TEN_SECONDLY = 3; | |
1214 | Dygraph.THIRTY_SECONDLY = 4; | |
1215 | Dygraph.MINUTELY = 5; | |
1216 | Dygraph.TWO_MINUTELY = 6; | |
1217 | Dygraph.FIVE_MINUTELY = 7; | |
1218 | Dygraph.TEN_MINUTELY = 8; | |
1219 | Dygraph.THIRTY_MINUTELY = 9; | |
1220 | Dygraph.HOURLY = 10; | |
1221 | Dygraph.TWO_HOURLY = 11; | |
1222 | Dygraph.SIX_HOURLY = 12; | |
1223 | Dygraph.DAILY = 13; | |
1224 | Dygraph.WEEKLY = 14; | |
1225 | Dygraph.MONTHLY = 15; | |
1226 | Dygraph.QUARTERLY = 16; | |
1227 | Dygraph.BIANNUAL = 17; | |
1228 | Dygraph.ANNUAL = 18; | |
1229 | Dygraph.DECADAL = 19; | |
1230 | Dygraph.NUM_GRANULARITIES = 20; | |
285a6bda DV |
1231 | |
1232 | Dygraph.SHORT_SPACINGS = []; | |
1233 | Dygraph.SHORT_SPACINGS[Dygraph.SECONDLY] = 1000 * 1; | |
20a41c17 DV |
1234 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_SECONDLY] = 1000 * 2; |
1235 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_SECONDLY] = 1000 * 5; | |
285a6bda DV |
1236 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_SECONDLY] = 1000 * 10; |
1237 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_SECONDLY] = 1000 * 30; | |
1238 | Dygraph.SHORT_SPACINGS[Dygraph.MINUTELY] = 1000 * 60; | |
20a41c17 DV |
1239 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_MINUTELY] = 1000 * 60 * 2; |
1240 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_MINUTELY] = 1000 * 60 * 5; | |
285a6bda DV |
1241 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_MINUTELY] = 1000 * 60 * 10; |
1242 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_MINUTELY] = 1000 * 60 * 30; | |
1243 | Dygraph.SHORT_SPACINGS[Dygraph.HOURLY] = 1000 * 3600; | |
20a41c17 | 1244 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_HOURLY] = 1000 * 3600 * 2; |
805d5519 | 1245 | Dygraph.SHORT_SPACINGS[Dygraph.SIX_HOURLY] = 1000 * 3600 * 6; |
285a6bda DV |
1246 | Dygraph.SHORT_SPACINGS[Dygraph.DAILY] = 1000 * 86400; |
1247 | Dygraph.SHORT_SPACINGS[Dygraph.WEEKLY] = 1000 * 604800; | |
32988383 DV |
1248 | |
1249 | // NumXTicks() | |
1250 | // | |
1251 | // If we used this time granularity, how many ticks would there be? | |
1252 | // This is only an approximation, but it's generally good enough. | |
1253 | // | |
285a6bda DV |
1254 | Dygraph.prototype.NumXTicks = function(start_time, end_time, granularity) { |
1255 | if (granularity < Dygraph.MONTHLY) { | |
32988383 | 1256 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1257 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
32988383 DV |
1258 | return Math.floor(0.5 + 1.0 * (end_time - start_time) / spacing); |
1259 | } else { | |
1260 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1261 | var num_months = 12; | |
285a6bda DV |
1262 | if (granularity == Dygraph.QUARTERLY) num_months = 3; |
1263 | if (granularity == Dygraph.BIANNUAL) num_months = 2; | |
1264 | if (granularity == Dygraph.ANNUAL) num_months = 1; | |
1265 | if (granularity == Dygraph.DECADAL) { num_months = 1; year_mod = 10; } | |
32988383 DV |
1266 | |
1267 | var msInYear = 365.2524 * 24 * 3600 * 1000; | |
1268 | var num_years = 1.0 * (end_time - start_time) / msInYear; | |
1269 | return Math.floor(0.5 + 1.0 * num_years * num_months / year_mod); | |
1270 | } | |
1271 | }; | |
1272 | ||
1273 | // GetXAxis() | |
1274 | // | |
1275 | // Construct an x-axis of nicely-formatted times on meaningful boundaries | |
1276 | // (e.g. 'Jan 09' rather than 'Jan 22, 2009'). | |
1277 | // | |
1278 | // Returns an array containing {v: millis, label: label} dictionaries. | |
1279 | // | |
285a6bda | 1280 | Dygraph.prototype.GetXAxis = function(start_time, end_time, granularity) { |
bf640e56 | 1281 | var formatter = this.attr_("xAxisLabelFormatter"); |
32988383 | 1282 | var ticks = []; |
285a6bda | 1283 | if (granularity < Dygraph.MONTHLY) { |
32988383 | 1284 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1285 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
3d29302c | 1286 | var format = '%d%b'; // e.g. "1Jan" |
076c9622 DV |
1287 | |
1288 | // Find a time less than start_time which occurs on a "nice" time boundary | |
1289 | // for this granularity. | |
1290 | var g = spacing / 1000; | |
076c9622 DV |
1291 | var d = new Date(start_time); |
1292 | if (g <= 60) { // seconds | |
1293 | var x = d.getSeconds(); d.setSeconds(x - x % g); | |
1294 | } else { | |
1295 | d.setSeconds(0); | |
1296 | g /= 60; | |
1297 | if (g <= 60) { // minutes | |
1298 | var x = d.getMinutes(); d.setMinutes(x - x % g); | |
1299 | } else { | |
1300 | d.setMinutes(0); | |
1301 | g /= 60; | |
1302 | ||
1303 | if (g <= 24) { // days | |
1304 | var x = d.getHours(); d.setHours(x - x % g); | |
1305 | } else { | |
1306 | d.setHours(0); | |
1307 | g /= 24; | |
1308 | ||
1309 | if (g == 7) { // one week | |
20a41c17 | 1310 | d.setDate(d.getDate() - d.getDay()); |
076c9622 DV |
1311 | } |
1312 | } | |
1313 | } | |
328bb812 | 1314 | } |
076c9622 DV |
1315 | start_time = d.getTime(); |
1316 | ||
32988383 | 1317 | for (var t = start_time; t <= end_time; t += spacing) { |
bf640e56 | 1318 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1319 | } |
1320 | } else { | |
1321 | // Display a tick mark on the first of a set of months of each year. | |
1322 | // Years get a tick mark iff y % year_mod == 0. This is useful for | |
1323 | // displaying a tick mark once every 10 years, say, on long time scales. | |
1324 | var months; | |
1325 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1326 | ||
285a6bda | 1327 | if (granularity == Dygraph.MONTHLY) { |
32988383 | 1328 | months = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ]; |
285a6bda | 1329 | } else if (granularity == Dygraph.QUARTERLY) { |
32988383 | 1330 | months = [ 0, 3, 6, 9 ]; |
285a6bda | 1331 | } else if (granularity == Dygraph.BIANNUAL) { |
32988383 | 1332 | months = [ 0, 6 ]; |
285a6bda | 1333 | } else if (granularity == Dygraph.ANNUAL) { |
32988383 | 1334 | months = [ 0 ]; |
285a6bda | 1335 | } else if (granularity == Dygraph.DECADAL) { |
32988383 DV |
1336 | months = [ 0 ]; |
1337 | year_mod = 10; | |
1338 | } | |
1339 | ||
1340 | var start_year = new Date(start_time).getFullYear(); | |
1341 | var end_year = new Date(end_time).getFullYear(); | |
285a6bda | 1342 | var zeropad = Dygraph.zeropad; |
32988383 DV |
1343 | for (var i = start_year; i <= end_year; i++) { |
1344 | if (i % year_mod != 0) continue; | |
1345 | for (var j = 0; j < months.length; j++) { | |
1346 | var date_str = i + "/" + zeropad(1 + months[j]) + "/01"; | |
1347 | var t = Date.parse(date_str); | |
1348 | if (t < start_time || t > end_time) continue; | |
bf640e56 | 1349 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1350 | } |
1351 | } | |
1352 | } | |
1353 | ||
1354 | return ticks; | |
1355 | }; | |
1356 | ||
6a1aa64f DV |
1357 | |
1358 | /** | |
1359 | * Add ticks to the x-axis based on a date range. | |
1360 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1361 | * @param {Number} endDate End of the date window (millis since epoch) | |
1362 | * @return {Array.<Object>} Array of {label, value} tuples. | |
1363 | * @public | |
1364 | */ | |
285a6bda | 1365 | Dygraph.dateTicker = function(startDate, endDate, self) { |
32988383 | 1366 | var chosen = -1; |
285a6bda DV |
1367 | for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) { |
1368 | var num_ticks = self.NumXTicks(startDate, endDate, i); | |
1369 | if (self.width_ / num_ticks >= self.attr_('pixelsPerXLabel')) { | |
32988383 DV |
1370 | chosen = i; |
1371 | break; | |
2769de62 | 1372 | } |
6a1aa64f DV |
1373 | } |
1374 | ||
32988383 | 1375 | if (chosen >= 0) { |
285a6bda | 1376 | return self.GetXAxis(startDate, endDate, chosen); |
6a1aa64f | 1377 | } else { |
32988383 | 1378 | // TODO(danvk): signal error. |
6a1aa64f | 1379 | } |
6a1aa64f DV |
1380 | }; |
1381 | ||
1382 | /** | |
1383 | * Add ticks when the x axis has numbers on it (instead of dates) | |
1384 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1385 | * @param {Number} endDate End of the date window (millis since epoch) | |
1386 | * @return {Array.<Object>} Array of {label, value} tuples. | |
1387 | * @public | |
1388 | */ | |
285a6bda | 1389 | Dygraph.numericTicks = function(minV, maxV, self) { |
c6336f04 DV |
1390 | // Basic idea: |
1391 | // Try labels every 1, 2, 5, 10, 20, 50, 100, etc. | |
1392 | // Calculate the resulting tick spacing (i.e. this.height_ / nTicks). | |
285a6bda | 1393 | // The first spacing greater than pixelsPerYLabel is what we use. |
ff00d3e2 | 1394 | // TODO(danvk): version that works on a log scale. |
f09e46d4 DV |
1395 | if (self.attr_("labelsKMG2")) { |
1396 | var mults = [1, 2, 4, 8]; | |
1397 | } else { | |
1398 | var mults = [1, 2, 5]; | |
1399 | } | |
c6336f04 | 1400 | var scale, low_val, high_val, nTicks; |
285a6bda DV |
1401 | // TODO(danvk): make it possible to set this for x- and y-axes independently. |
1402 | var pixelsPerTick = self.attr_('pixelsPerYLabel'); | |
c6336f04 | 1403 | for (var i = -10; i < 50; i++) { |
f09e46d4 DV |
1404 | if (self.attr_("labelsKMG2")) { |
1405 | var base_scale = Math.pow(16, i); | |
1406 | } else { | |
1407 | var base_scale = Math.pow(10, i); | |
1408 | } | |
c6336f04 DV |
1409 | for (var j = 0; j < mults.length; j++) { |
1410 | scale = base_scale * mults[j]; | |
c6336f04 DV |
1411 | low_val = Math.floor(minV / scale) * scale; |
1412 | high_val = Math.ceil(maxV / scale) * scale; | |
48a0ac91 | 1413 | nTicks = Math.abs(high_val - low_val) / scale; |
285a6bda | 1414 | var spacing = self.height_ / nTicks; |
c6336f04 | 1415 | // wish I could break out of both loops at once... |
285a6bda | 1416 | if (spacing > pixelsPerTick) break; |
c6336f04 | 1417 | } |
285a6bda | 1418 | if (spacing > pixelsPerTick) break; |
6a1aa64f DV |
1419 | } |
1420 | ||
1421 | // Construct labels for the ticks | |
1422 | var ticks = []; | |
ed11be50 DV |
1423 | var k; |
1424 | var k_labels = []; | |
1425 | if (self.attr_("labelsKMB")) { | |
1426 | k = 1000; | |
1427 | k_labels = [ "K", "M", "B", "T" ]; | |
1428 | } | |
1429 | if (self.attr_("labelsKMG2")) { | |
1430 | if (k) self.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); | |
1431 | k = 1024; | |
1432 | k_labels = [ "k", "M", "G", "T" ]; | |
1433 | } | |
1434 | ||
e21e69e2 | 1435 | // Allow reverse y-axis if it's explicitly requested. |
be7cdb11 | 1436 | if (low_val > high_val) scale *= -1; |
48a0ac91 | 1437 | |
c6336f04 DV |
1438 | for (var i = 0; i < nTicks; i++) { |
1439 | var tickV = low_val + i * scale; | |
0af6e346 | 1440 | var absTickV = Math.abs(tickV); |
029da4b6 | 1441 | var label = Dygraph.round_(tickV, 2); |
ed11be50 DV |
1442 | if (k_labels.length) { |
1443 | // Round up to an appropriate unit. | |
1444 | var n = k*k*k*k; | |
1445 | for (var j = 3; j >= 0; j--, n /= k) { | |
1446 | if (absTickV >= n) { | |
029da4b6 | 1447 | label = Dygraph.round_(tickV / n, 1) + k_labels[j]; |
ed11be50 DV |
1448 | break; |
1449 | } | |
afefbcdb | 1450 | } |
6a1aa64f DV |
1451 | } |
1452 | ticks.push( {label: label, v: tickV} ); | |
1453 | } | |
1454 | return ticks; | |
1455 | }; | |
1456 | ||
1457 | /** | |
1458 | * Adds appropriate ticks on the y-axis | |
1459 | * @param {Number} minY The minimum Y value in the data set | |
1460 | * @param {Number} maxY The maximum Y value in the data set | |
1461 | * @private | |
1462 | */ | |
285a6bda | 1463 | Dygraph.prototype.addYTicks_ = function(minY, maxY) { |
6a1aa64f | 1464 | // Set the number of ticks so that the labels are human-friendly. |
285a6bda DV |
1465 | // TODO(danvk): make this an attribute as well. |
1466 | var ticks = Dygraph.numericTicks(minY, maxY, this); | |
6a1aa64f DV |
1467 | this.layout_.updateOptions( { yAxis: [minY, maxY], |
1468 | yTicks: ticks } ); | |
1469 | }; | |
1470 | ||
5011e7a1 DV |
1471 | // Computes the range of the data series (including confidence intervals). |
1472 | // series is either [ [x1, y1], [x2, y2], ... ] or | |
1473 | // [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... | |
1474 | // Returns [low, high] | |
1475 | Dygraph.prototype.extremeValues_ = function(series) { | |
1476 | var minY = null, maxY = null; | |
1477 | ||
9922b78b | 1478 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
5011e7a1 DV |
1479 | if (bars) { |
1480 | // With custom bars, maxY is the max of the high values. | |
1481 | for (var j = 0; j < series.length; j++) { | |
1482 | var y = series[j][1][0]; | |
1483 | if (!y) continue; | |
1484 | var low = y - series[j][1][1]; | |
1485 | var high = y + series[j][1][2]; | |
1486 | if (low > y) low = y; // this can happen with custom bars, | |
1487 | if (high < y) high = y; // e.g. in tests/custom-bars.html | |
1488 | if (maxY == null || high > maxY) { | |
1489 | maxY = high; | |
1490 | } | |
1491 | if (minY == null || low < minY) { | |
1492 | minY = low; | |
1493 | } | |
1494 | } | |
1495 | } else { | |
1496 | for (var j = 0; j < series.length; j++) { | |
1497 | var y = series[j][1]; | |
d12999d3 | 1498 | if (y === null || isNaN(y)) continue; |
5011e7a1 DV |
1499 | if (maxY == null || y > maxY) { |
1500 | maxY = y; | |
1501 | } | |
1502 | if (minY == null || y < minY) { | |
1503 | minY = y; | |
1504 | } | |
1505 | } | |
1506 | } | |
1507 | ||
1508 | return [minY, maxY]; | |
1509 | }; | |
1510 | ||
6a1aa64f DV |
1511 | /** |
1512 | * Update the graph with new data. Data is in the format | |
1513 | * [ [date1, val1, val2, ...], [date2, val1, val2, ...] if errorBars=false | |
1514 | * or, if errorBars=true, | |
1515 | * [ [date1, [val1,stddev1], [val2,stddev2], ...], [date2, ...], ...] | |
1516 | * @param {Array.<Object>} data The data (see above) | |
1517 | * @private | |
1518 | */ | |
285a6bda | 1519 | Dygraph.prototype.drawGraph_ = function(data) { |
fe0b7c03 DV |
1520 | // This is used to set the second parameter to drawCallback, below. |
1521 | var is_initial_draw = this.is_initial_draw_; | |
1522 | this.is_initial_draw_ = false; | |
1523 | ||
3bd9c228 | 1524 | var minY = null, maxY = null; |
6a1aa64f | 1525 | this.layout_.removeAllDatasets(); |
285a6bda | 1526 | this.setColors_(); |
9317362d | 1527 | this.attrs_['pointSize'] = 0.5 * this.attr_('highlightCircleSize'); |
285a6bda | 1528 | |
f032c51d AV |
1529 | var connectSeparatedPoints = this.attr_('connectSeparatedPoints'); |
1530 | ||
354e15ab DE |
1531 | // Loop over the fields (series). Go from the last to the first, |
1532 | // because if they're stacked that's how we accumulate the values. | |
43af96e7 | 1533 | |
354e15ab DE |
1534 | var cumulative_y = []; // For stacked series. |
1535 | var datasets = []; | |
1536 | ||
1537 | // Loop over all fields and create datasets | |
1538 | for (var i = data[0].length - 1; i >= 1; i--) { | |
1cf11047 DV |
1539 | if (!this.visibility()[i - 1]) continue; |
1540 | ||
6a1aa64f DV |
1541 | var series = []; |
1542 | for (var j = 0; j < data.length; j++) { | |
4a634fc7 | 1543 | if (data[j][i] != null || !connectSeparatedPoints) { |
f032c51d | 1544 | var date = data[j][0]; |
563c70ca | 1545 | series.push([date, data[j][i]]); |
f032c51d | 1546 | } |
6a1aa64f DV |
1547 | } |
1548 | series = this.rollingAverage(series, this.rollPeriod_); | |
1549 | ||
1550 | // Prune down to the desired range, if necessary (for zooming) | |
1a26f3fb DV |
1551 | // Because there can be lines going to points outside of the visible area, |
1552 | // we actually prune to visible points, plus one on either side. | |
9922b78b | 1553 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
6a1aa64f DV |
1554 | if (this.dateWindow_) { |
1555 | var low = this.dateWindow_[0]; | |
1556 | var high= this.dateWindow_[1]; | |
1557 | var pruned = []; | |
1a26f3fb DV |
1558 | // TODO(danvk): do binary search instead of linear search. |
1559 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. | |
1560 | var firstIdx = null, lastIdx = null; | |
6a1aa64f | 1561 | for (var k = 0; k < series.length; k++) { |
1a26f3fb DV |
1562 | if (series[k][0] >= low && firstIdx === null) { |
1563 | firstIdx = k; | |
1564 | } | |
1565 | if (series[k][0] <= high) { | |
1566 | lastIdx = k; | |
6a1aa64f DV |
1567 | } |
1568 | } | |
1a26f3fb DV |
1569 | if (firstIdx === null) firstIdx = 0; |
1570 | if (firstIdx > 0) firstIdx--; | |
1571 | if (lastIdx === null) lastIdx = series.length - 1; | |
1572 | if (lastIdx < series.length - 1) lastIdx++; | |
16269f6e | 1573 | this.boundaryIds_[i-1] = [firstIdx, lastIdx]; |
1a26f3fb DV |
1574 | for (var k = firstIdx; k <= lastIdx; k++) { |
1575 | pruned.push(series[k]); | |
6a1aa64f DV |
1576 | } |
1577 | series = pruned; | |
16269f6e NAG |
1578 | } else { |
1579 | this.boundaryIds_[i-1] = [0, series.length-1]; | |
6a1aa64f DV |
1580 | } |
1581 | ||
648acd28 DV |
1582 | var extremes = this.extremeValues_(series); |
1583 | var thisMinY = extremes[0]; | |
1584 | var thisMaxY = extremes[1]; | |
61b78cd6 DV |
1585 | if (minY === null || thisMinY < minY) minY = thisMinY; |
1586 | if (maxY === null || thisMaxY > maxY) maxY = thisMaxY; | |
5011e7a1 | 1587 | |
6a1aa64f | 1588 | if (bars) { |
354e15ab DE |
1589 | for (var j=0; j<series.length; j++) { |
1590 | val = [series[j][0], series[j][1][0], series[j][1][1], series[j][1][2]]; | |
1591 | series[j] = val; | |
1592 | } | |
43af96e7 | 1593 | } else if (this.attr_("stackedGraph")) { |
43af96e7 NK |
1594 | var l = series.length; |
1595 | var actual_y; | |
1596 | for (var j = 0; j < l; j++) { | |
354e15ab DE |
1597 | // If one data set has a NaN, let all subsequent stacked |
1598 | // sets inherit the NaN -- only start at 0 for the first set. | |
1599 | var x = series[j][0]; | |
1600 | if (cumulative_y[x] === undefined) | |
1601 | cumulative_y[x] = 0; | |
43af96e7 NK |
1602 | |
1603 | actual_y = series[j][1]; | |
354e15ab | 1604 | cumulative_y[x] += actual_y; |
43af96e7 | 1605 | |
354e15ab | 1606 | series[j] = [x, cumulative_y[x]] |
43af96e7 | 1607 | |
354e15ab DE |
1608 | if (!maxY || cumulative_y[x] > maxY) |
1609 | maxY = cumulative_y[x]; | |
43af96e7 | 1610 | } |
6a1aa64f | 1611 | } |
354e15ab DE |
1612 | |
1613 | datasets[i] = series; | |
6a1aa64f DV |
1614 | } |
1615 | ||
354e15ab | 1616 | for (var i = 1; i < datasets.length; i++) { |
4523c1f6 | 1617 | if (!this.visibility()[i - 1]) continue; |
354e15ab | 1618 | this.layout_.addDataset(this.attr_("labels")[i], datasets[i]); |
43af96e7 NK |
1619 | } |
1620 | ||
6a1aa64f DV |
1621 | // Use some heuristics to come up with a good maxY value, unless it's been |
1622 | // set explicitly by the user. | |
1623 | if (this.valueRange_ != null) { | |
1624 | this.addYTicks_(this.valueRange_[0], this.valueRange_[1]); | |
3230c662 | 1625 | this.displayedYRange_ = this.valueRange_; |
6a1aa64f | 1626 | } else { |
d053ab5a DV |
1627 | // This affects the calculation of span, below. |
1628 | if (this.attr_("includeZero") && minY > 0) { | |
1629 | minY = 0; | |
1630 | } | |
1631 | ||
6a1aa64f | 1632 | // Add some padding and round up to an integer to be human-friendly. |
3bd9c228 | 1633 | var span = maxY - minY; |
93dfacfd DV |
1634 | // special case: if we have no sense of scale, use +/-10% of the sole value. |
1635 | if (span == 0) { span = maxY; } | |
3bd9c228 DV |
1636 | var maxAxisY = maxY + 0.1 * span; |
1637 | var minAxisY = minY - 0.1 * span; | |
1638 | ||
1639 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. | |
ceb009dd DV |
1640 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; |
1641 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
3bd9c228 DV |
1642 | |
1643 | if (this.attr_("includeZero")) { | |
1644 | if (maxY < 0) maxAxisY = 0; | |
1645 | if (minY > 0) minAxisY = 0; | |
1646 | } | |
1647 | ||
1648 | this.addYTicks_(minAxisY, maxAxisY); | |
3230c662 | 1649 | this.displayedYRange_ = [minAxisY, maxAxisY]; |
6a1aa64f DV |
1650 | } |
1651 | ||
1652 | this.addXTicks_(); | |
1653 | ||
1654 | // Tell PlotKit to use this new data and render itself | |
d033ae1c | 1655 | this.layout_.updateOptions({dateWindow: this.dateWindow_}); |
6a1aa64f DV |
1656 | this.layout_.evaluateWithError(); |
1657 | this.plotter_.clear(); | |
1658 | this.plotter_.render(); | |
f6401bf6 DV |
1659 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
1660 | this.canvas_.height); | |
599fb4ad DV |
1661 | |
1662 | if (this.attr_("drawCallback") !== null) { | |
fe0b7c03 | 1663 | this.attr_("drawCallback")(this, is_initial_draw); |
599fb4ad | 1664 | } |
6a1aa64f DV |
1665 | }; |
1666 | ||
1667 | /** | |
1668 | * Calculates the rolling average of a data set. | |
1669 | * If originalData is [label, val], rolls the average of those. | |
1670 | * If originalData is [label, [, it's interpreted as [value, stddev] | |
1671 | * and the roll is returned in the same form, with appropriately reduced | |
1672 | * stddev for each value. | |
1673 | * Note that this is where fractional input (i.e. '5/10') is converted into | |
1674 | * decimal values. | |
1675 | * @param {Array} originalData The data in the appropriate format (see above) | |
1676 | * @param {Number} rollPeriod The number of days over which to average the data | |
1677 | */ | |
285a6bda | 1678 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
6a1aa64f DV |
1679 | if (originalData.length < 2) |
1680 | return originalData; | |
1681 | var rollPeriod = Math.min(rollPeriod, originalData.length - 1); | |
1682 | var rollingData = []; | |
285a6bda | 1683 | var sigma = this.attr_("sigma"); |
6a1aa64f DV |
1684 | |
1685 | if (this.fractions_) { | |
1686 | var num = 0; | |
1687 | var den = 0; // numerator/denominator | |
1688 | var mult = 100.0; | |
1689 | for (var i = 0; i < originalData.length; i++) { | |
1690 | num += originalData[i][1][0]; | |
1691 | den += originalData[i][1][1]; | |
1692 | if (i - rollPeriod >= 0) { | |
1693 | num -= originalData[i - rollPeriod][1][0]; | |
1694 | den -= originalData[i - rollPeriod][1][1]; | |
1695 | } | |
1696 | ||
1697 | var date = originalData[i][0]; | |
1698 | var value = den ? num / den : 0.0; | |
285a6bda | 1699 | if (this.attr_("errorBars")) { |
6a1aa64f DV |
1700 | if (this.wilsonInterval_) { |
1701 | // For more details on this confidence interval, see: | |
1702 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval | |
1703 | if (den) { | |
1704 | var p = value < 0 ? 0 : value, n = den; | |
1705 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); | |
1706 | var denom = 1 + sigma * sigma / den; | |
1707 | var low = (p + sigma * sigma / (2 * den) - pm) / denom; | |
1708 | var high = (p + sigma * sigma / (2 * den) + pm) / denom; | |
1709 | rollingData[i] = [date, | |
1710 | [p * mult, (p - low) * mult, (high - p) * mult]]; | |
1711 | } else { | |
1712 | rollingData[i] = [date, [0, 0, 0]]; | |
1713 | } | |
1714 | } else { | |
1715 | var stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; | |
1716 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; | |
1717 | } | |
1718 | } else { | |
1719 | rollingData[i] = [date, mult * value]; | |
1720 | } | |
1721 | } | |
9922b78b | 1722 | } else if (this.attr_("customBars")) { |
f6885d6a DV |
1723 | var low = 0; |
1724 | var mid = 0; | |
1725 | var high = 0; | |
1726 | var count = 0; | |
6a1aa64f DV |
1727 | for (var i = 0; i < originalData.length; i++) { |
1728 | var data = originalData[i][1]; | |
1729 | var y = data[1]; | |
1730 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; | |
f6885d6a | 1731 | |
8b91c51f | 1732 | if (y != null && !isNaN(y)) { |
49a7d0d5 DV |
1733 | low += data[0]; |
1734 | mid += y; | |
1735 | high += data[2]; | |
1736 | count += 1; | |
1737 | } | |
f6885d6a DV |
1738 | if (i - rollPeriod >= 0) { |
1739 | var prev = originalData[i - rollPeriod]; | |
8b91c51f | 1740 | if (prev[1][1] != null && !isNaN(prev[1][1])) { |
49a7d0d5 DV |
1741 | low -= prev[1][0]; |
1742 | mid -= prev[1][1]; | |
1743 | high -= prev[1][2]; | |
1744 | count -= 1; | |
1745 | } | |
f6885d6a DV |
1746 | } |
1747 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, | |
1748 | 1.0 * (mid - low) / count, | |
1749 | 1.0 * (high - mid) / count ]]; | |
2769de62 | 1750 | } |
6a1aa64f DV |
1751 | } else { |
1752 | // Calculate the rolling average for the first rollPeriod - 1 points where | |
1753 | // there is not enough data to roll over the full number of days | |
1754 | var num_init_points = Math.min(rollPeriod - 1, originalData.length - 2); | |
285a6bda | 1755 | if (!this.attr_("errorBars")){ |
5011e7a1 DV |
1756 | if (rollPeriod == 1) { |
1757 | return originalData; | |
1758 | } | |
1759 | ||
2847c1cf | 1760 | for (var i = 0; i < originalData.length; i++) { |
6a1aa64f | 1761 | var sum = 0; |
5011e7a1 | 1762 | var num_ok = 0; |
2847c1cf DV |
1763 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
1764 | var y = originalData[j][1]; | |
8b91c51f | 1765 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 1766 | num_ok++; |
2847c1cf | 1767 | sum += originalData[j][1]; |
6a1aa64f | 1768 | } |
5011e7a1 | 1769 | if (num_ok) { |
2847c1cf | 1770 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
5011e7a1 | 1771 | } else { |
2847c1cf | 1772 | rollingData[i] = [originalData[i][0], null]; |
5011e7a1 | 1773 | } |
6a1aa64f | 1774 | } |
2847c1cf DV |
1775 | |
1776 | } else { | |
1777 | for (var i = 0; i < originalData.length; i++) { | |
6a1aa64f DV |
1778 | var sum = 0; |
1779 | var variance = 0; | |
5011e7a1 | 1780 | var num_ok = 0; |
2847c1cf | 1781 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
5011e7a1 | 1782 | var y = originalData[j][1][0]; |
8b91c51f | 1783 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 1784 | num_ok++; |
6a1aa64f DV |
1785 | sum += originalData[j][1][0]; |
1786 | variance += Math.pow(originalData[j][1][1], 2); | |
1787 | } | |
5011e7a1 DV |
1788 | if (num_ok) { |
1789 | var stddev = Math.sqrt(variance) / num_ok; | |
1790 | rollingData[i] = [originalData[i][0], | |
1791 | [sum / num_ok, sigma * stddev, sigma * stddev]]; | |
1792 | } else { | |
1793 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
1794 | } | |
6a1aa64f DV |
1795 | } |
1796 | } | |
1797 | } | |
1798 | ||
1799 | return rollingData; | |
1800 | }; | |
1801 | ||
1802 | /** | |
1803 | * Parses a date, returning the number of milliseconds since epoch. This can be | |
285a6bda DV |
1804 | * passed in as an xValueParser in the Dygraph constructor. |
1805 | * TODO(danvk): enumerate formats that this understands. | |
6a1aa64f DV |
1806 | * @param {String} A date in YYYYMMDD format. |
1807 | * @return {Number} Milliseconds since epoch. | |
1808 | * @public | |
1809 | */ | |
285a6bda | 1810 | Dygraph.dateParser = function(dateStr, self) { |
6a1aa64f | 1811 | var dateStrSlashed; |
285a6bda | 1812 | var d; |
986a5026 | 1813 | if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12' |
6a1aa64f | 1814 | dateStrSlashed = dateStr.replace("-", "/", "g"); |
353a0294 DV |
1815 | while (dateStrSlashed.search("-") != -1) { |
1816 | dateStrSlashed = dateStrSlashed.replace("-", "/"); | |
1817 | } | |
285a6bda | 1818 | d = Date.parse(dateStrSlashed); |
2769de62 | 1819 | } else if (dateStr.length == 8) { // e.g. '20090712' |
285a6bda | 1820 | // TODO(danvk): remove support for this format. It's confusing. |
6a1aa64f DV |
1821 | dateStrSlashed = dateStr.substr(0,4) + "/" + dateStr.substr(4,2) |
1822 | + "/" + dateStr.substr(6,2); | |
285a6bda | 1823 | d = Date.parse(dateStrSlashed); |
2769de62 DV |
1824 | } else { |
1825 | // Any format that Date.parse will accept, e.g. "2009/07/12" or | |
1826 | // "2009/07/12 12:34:56" | |
285a6bda DV |
1827 | d = Date.parse(dateStr); |
1828 | } | |
1829 | ||
1830 | if (!d || isNaN(d)) { | |
1831 | self.error("Couldn't parse " + dateStr + " as a date"); | |
1832 | } | |
1833 | return d; | |
1834 | }; | |
1835 | ||
1836 | /** | |
1837 | * Detects the type of the str (date or numeric) and sets the various | |
1838 | * formatting attributes in this.attrs_ based on this type. | |
1839 | * @param {String} str An x value. | |
1840 | * @private | |
1841 | */ | |
1842 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
1843 | var isDate = false; | |
1844 | if (str.indexOf('-') >= 0 || | |
1845 | str.indexOf('/') >= 0 || | |
1846 | isNaN(parseFloat(str))) { | |
1847 | isDate = true; | |
1848 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
1849 | // TODO(danvk): remove support for this format. | |
1850 | isDate = true; | |
1851 | } | |
1852 | ||
1853 | if (isDate) { | |
1854 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
1855 | this.attrs_.xValueParser = Dygraph.dateParser; | |
1856 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 1857 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
1858 | } else { |
1859 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
1860 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
1861 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 1862 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
6a1aa64f | 1863 | } |
6a1aa64f DV |
1864 | }; |
1865 | ||
1866 | /** | |
1867 | * Parses a string in a special csv format. We expect a csv file where each | |
1868 | * line is a date point, and the first field in each line is the date string. | |
1869 | * We also expect that all remaining fields represent series. | |
285a6bda | 1870 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f DV |
1871 | * date, series1, stddev1, series2, stddev2, ... |
1872 | * @param {Array.<Object>} data See above. | |
1873 | * @private | |
285a6bda DV |
1874 | * |
1875 | * @return Array.<Object> An array with one entry for each row. These entries | |
1876 | * are an array of cells in that row. The first entry is the parsed x-value for | |
1877 | * the row. The second, third, etc. are the y-values. These can take on one of | |
1878 | * three forms, depending on the CSV and constructor parameters: | |
1879 | * 1. numeric value | |
1880 | * 2. [ value, stddev ] | |
1881 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 1882 | */ |
285a6bda | 1883 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f DV |
1884 | var ret = []; |
1885 | var lines = data.split("\n"); | |
3d67f03b DV |
1886 | |
1887 | // Use the default delimiter or fall back to a tab if that makes sense. | |
1888 | var delim = this.attr_('delimiter'); | |
1889 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { | |
1890 | delim = '\t'; | |
1891 | } | |
1892 | ||
285a6bda | 1893 | var start = 0; |
6a1aa64f | 1894 | if (this.labelsFromCSV_) { |
285a6bda | 1895 | start = 1; |
3d67f03b | 1896 | this.attrs_.labels = lines[0].split(delim); |
6a1aa64f DV |
1897 | } |
1898 | ||
285a6bda DV |
1899 | var xParser; |
1900 | var defaultParserSet = false; // attempt to auto-detect x value type | |
1901 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 1902 | var outOfOrder = false; |
6a1aa64f DV |
1903 | for (var i = start; i < lines.length; i++) { |
1904 | var line = lines[i]; | |
1905 | if (line.length == 0) continue; // skip blank lines | |
3d67f03b DV |
1906 | if (line[0] == '#') continue; // skip comment lines |
1907 | var inFields = line.split(delim); | |
285a6bda | 1908 | if (inFields.length < 2) continue; |
6a1aa64f DV |
1909 | |
1910 | var fields = []; | |
285a6bda DV |
1911 | if (!defaultParserSet) { |
1912 | this.detectTypeFromString_(inFields[0]); | |
1913 | xParser = this.attr_("xValueParser"); | |
1914 | defaultParserSet = true; | |
1915 | } | |
1916 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
1917 | |
1918 | // If fractions are expected, parse the numbers as "A/B" | |
1919 | if (this.fractions_) { | |
1920 | for (var j = 1; j < inFields.length; j++) { | |
1921 | // TODO(danvk): figure out an appropriate way to flag parse errors. | |
1922 | var vals = inFields[j].split("/"); | |
1923 | fields[j] = [parseFloat(vals[0]), parseFloat(vals[1])]; | |
1924 | } | |
285a6bda | 1925 | } else if (this.attr_("errorBars")) { |
6a1aa64f DV |
1926 | // If there are error bars, values are (value, stddev) pairs |
1927 | for (var j = 1; j < inFields.length; j += 2) | |
1928 | fields[(j + 1) / 2] = [parseFloat(inFields[j]), | |
1929 | parseFloat(inFields[j + 1])]; | |
9922b78b | 1930 | } else if (this.attr_("customBars")) { |
6a1aa64f DV |
1931 | // Bars are a low;center;high tuple |
1932 | for (var j = 1; j < inFields.length; j++) { | |
1933 | var vals = inFields[j].split(";"); | |
1934 | fields[j] = [ parseFloat(vals[0]), | |
1935 | parseFloat(vals[1]), | |
1936 | parseFloat(vals[2]) ]; | |
1937 | } | |
1938 | } else { | |
1939 | // Values are just numbers | |
285a6bda | 1940 | for (var j = 1; j < inFields.length; j++) { |
6a1aa64f | 1941 | fields[j] = parseFloat(inFields[j]); |
285a6bda | 1942 | } |
6a1aa64f | 1943 | } |
987840a2 DV |
1944 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
1945 | outOfOrder = true; | |
1946 | } | |
6a1aa64f | 1947 | ret.push(fields); |
285a6bda DV |
1948 | |
1949 | if (fields.length != expectedCols) { | |
1950 | this.error("Number of columns in line " + i + " (" + fields.length + | |
1951 | ") does not agree with number of labels (" + expectedCols + | |
1952 | ") " + line); | |
1953 | } | |
6a1aa64f | 1954 | } |
987840a2 DV |
1955 | |
1956 | if (outOfOrder) { | |
1957 | this.warn("CSV is out of order; order it correctly to speed loading."); | |
1958 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
1959 | } | |
1960 | ||
6a1aa64f DV |
1961 | return ret; |
1962 | }; | |
1963 | ||
1964 | /** | |
285a6bda DV |
1965 | * The user has provided their data as a pre-packaged JS array. If the x values |
1966 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
1967 | * are dates, we need to convert them from Date objects to ms since epoch. | |
1968 | * @param {Array.<Object>} data | |
1969 | * @return {Array.<Object>} data with numeric x values. | |
1970 | */ | |
1971 | Dygraph.prototype.parseArray_ = function(data) { | |
1972 | // Peek at the first x value to see if it's numeric. | |
1973 | if (data.length == 0) { | |
1974 | this.error("Can't plot empty data set"); | |
1975 | return null; | |
1976 | } | |
1977 | if (data[0].length == 0) { | |
1978 | this.error("Data set cannot contain an empty row"); | |
1979 | return null; | |
1980 | } | |
1981 | ||
1982 | if (this.attr_("labels") == null) { | |
1983 | this.warn("Using default labels. Set labels explicitly via 'labels' " + | |
1984 | "in the options parameter"); | |
1985 | this.attrs_.labels = [ "X" ]; | |
1986 | for (var i = 1; i < data[0].length; i++) { | |
1987 | this.attrs_.labels.push("Y" + i); | |
1988 | } | |
1989 | } | |
1990 | ||
2dda3850 | 1991 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda DV |
1992 | // Some intelligent defaults for a date x-axis. |
1993 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
bf640e56 | 1994 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
1995 | this.attrs_.xTicker = Dygraph.dateTicker; |
1996 | ||
1997 | // Assume they're all dates. | |
e3ab7b40 | 1998 | var parsedData = Dygraph.clone(data); |
285a6bda DV |
1999 | for (var i = 0; i < data.length; i++) { |
2000 | if (parsedData[i].length == 0) { | |
2001 | this.error("Row " << (1 + i) << " of data is empty"); | |
2002 | return null; | |
2003 | } | |
2004 | if (parsedData[i][0] == null | |
3a909ec5 DV |
2005 | || typeof(parsedData[i][0].getTime) != 'function' |
2006 | || isNaN(parsedData[i][0].getTime())) { | |
be96a1f5 | 2007 | this.error("x value in row " + (1 + i) + " is not a Date"); |
285a6bda DV |
2008 | return null; |
2009 | } | |
2010 | parsedData[i][0] = parsedData[i][0].getTime(); | |
2011 | } | |
2012 | return parsedData; | |
2013 | } else { | |
2014 | // Some intelligent defaults for a numeric x-axis. | |
2015 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
2016 | this.attrs_.xTicker = Dygraph.numericTicks; | |
2017 | return data; | |
2018 | } | |
2019 | }; | |
2020 | ||
2021 | /** | |
79420a1e DV |
2022 | * Parses a DataTable object from gviz. |
2023 | * The data is expected to have a first column that is either a date or a | |
2024 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
2025 | * between this.xValueParser_ and the type of the first column, it will be | |
2026 | * fixed. Returned value is in the same format as return value of parseCSV_. | |
2027 | * @param {Array.<Object>} data See above. | |
2028 | * @private | |
2029 | */ | |
285a6bda | 2030 | Dygraph.prototype.parseDataTable_ = function(data) { |
79420a1e DV |
2031 | var cols = data.getNumberOfColumns(); |
2032 | var rows = data.getNumberOfRows(); | |
2033 | ||
2034 | // Read column labels | |
2035 | var labels = []; | |
2036 | for (var i = 0; i < cols; i++) { | |
2037 | labels.push(data.getColumnLabel(i)); | |
3e3f84e4 | 2038 | if (i != 0 && this.attr_("errorBars")) i += 1; |
79420a1e | 2039 | } |
285a6bda | 2040 | this.attrs_.labels = labels; |
3e3f84e4 | 2041 | cols = labels.length; |
79420a1e | 2042 | |
d955e223 | 2043 | var indepType = data.getColumnType(0); |
4440f6c8 | 2044 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda DV |
2045 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
2046 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2047 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2048 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
33127159 | 2049 | } else if (indepType == 'number') { |
285a6bda DV |
2050 | this.attrs_.xValueFormatter = function(x) { return x; }; |
2051 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
2052 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2053 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
285a6bda | 2054 | } else { |
987840a2 DV |
2055 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
2056 | "column 1 of DataTable input (Got '" + indepType + "')"); | |
79420a1e DV |
2057 | return null; |
2058 | } | |
2059 | ||
2060 | var ret = []; | |
987840a2 | 2061 | var outOfOrder = false; |
79420a1e DV |
2062 | for (var i = 0; i < rows; i++) { |
2063 | var row = []; | |
debe4434 DV |
2064 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
2065 | data.getValue(i, 0) === null) { | |
2066 | this.warning("Ignoring row " + i + | |
2067 | " of DataTable because of undefined or null first column."); | |
2068 | continue; | |
2069 | } | |
2070 | ||
c21d2c2d | 2071 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
2072 | row.push(data.getValue(i, 0).getTime()); |
2073 | } else { | |
2074 | row.push(data.getValue(i, 0)); | |
2075 | } | |
3e3f84e4 DV |
2076 | if (!this.attr_("errorBars")) { |
2077 | for (var j = 1; j < cols; j++) { | |
2078 | row.push(data.getValue(i, j)); | |
2079 | } | |
2080 | } else { | |
2081 | for (var j = 0; j < cols - 1; j++) { | |
2082 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); | |
2083 | } | |
79420a1e | 2084 | } |
987840a2 DV |
2085 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
2086 | outOfOrder = true; | |
2087 | } | |
243d96e8 | 2088 | ret.push(row); |
79420a1e | 2089 | } |
987840a2 DV |
2090 | |
2091 | if (outOfOrder) { | |
2092 | this.warn("DataTable is out of order; order it correctly to speed loading."); | |
2093 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2094 | } | |
79420a1e DV |
2095 | return ret; |
2096 | } | |
2097 | ||
24e5350c | 2098 | // These functions are all based on MochiKit. |
fc80a396 DV |
2099 | Dygraph.update = function (self, o) { |
2100 | if (typeof(o) != 'undefined' && o !== null) { | |
2101 | for (var k in o) { | |
85b99f0b DV |
2102 | if (o.hasOwnProperty(k)) { |
2103 | self[k] = o[k]; | |
2104 | } | |
fc80a396 DV |
2105 | } |
2106 | } | |
2107 | return self; | |
2108 | }; | |
2109 | ||
2dda3850 DV |
2110 | Dygraph.isArrayLike = function (o) { |
2111 | var typ = typeof(o); | |
2112 | if ( | |
c21d2c2d | 2113 | (typ != 'object' && !(typ == 'function' && |
2dda3850 DV |
2114 | typeof(o.item) == 'function')) || |
2115 | o === null || | |
2116 | typeof(o.length) != 'number' || | |
2117 | o.nodeType === 3 | |
2118 | ) { | |
2119 | return false; | |
2120 | } | |
2121 | return true; | |
2122 | }; | |
2123 | ||
2124 | Dygraph.isDateLike = function (o) { | |
2125 | if (typeof(o) != "object" || o === null || | |
2126 | typeof(o.getTime) != 'function') { | |
2127 | return false; | |
2128 | } | |
2129 | return true; | |
2130 | }; | |
2131 | ||
e3ab7b40 DV |
2132 | Dygraph.clone = function(o) { |
2133 | // TODO(danvk): figure out how MochiKit's version works | |
2134 | var r = []; | |
2135 | for (var i = 0; i < o.length; i++) { | |
2136 | if (Dygraph.isArrayLike(o[i])) { | |
2137 | r.push(Dygraph.clone(o[i])); | |
2138 | } else { | |
2139 | r.push(o[i]); | |
2140 | } | |
2141 | } | |
2142 | return r; | |
24e5350c DV |
2143 | }; |
2144 | ||
2dda3850 | 2145 | |
79420a1e | 2146 | /** |
6a1aa64f DV |
2147 | * Get the CSV data. If it's in a function, call that function. If it's in a |
2148 | * file, do an XMLHttpRequest to get it. | |
2149 | * @private | |
2150 | */ | |
285a6bda | 2151 | Dygraph.prototype.start_ = function() { |
6a1aa64f | 2152 | if (typeof this.file_ == 'function') { |
285a6bda | 2153 | // CSV string. Pretend we got it via XHR. |
6a1aa64f | 2154 | this.loadedEvent_(this.file_()); |
2dda3850 | 2155 | } else if (Dygraph.isArrayLike(this.file_)) { |
285a6bda DV |
2156 | this.rawData_ = this.parseArray_(this.file_); |
2157 | this.drawGraph_(this.rawData_); | |
79420a1e DV |
2158 | } else if (typeof this.file_ == 'object' && |
2159 | typeof this.file_.getColumnRange == 'function') { | |
2160 | // must be a DataTable from gviz. | |
2161 | this.rawData_ = this.parseDataTable_(this.file_); | |
2162 | this.drawGraph_(this.rawData_); | |
285a6bda DV |
2163 | } else if (typeof this.file_ == 'string') { |
2164 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. | |
2165 | if (this.file_.indexOf('\n') >= 0) { | |
2166 | this.loadedEvent_(this.file_); | |
2167 | } else { | |
2168 | var req = new XMLHttpRequest(); | |
2169 | var caller = this; | |
2170 | req.onreadystatechange = function () { | |
2171 | if (req.readyState == 4) { | |
2172 | if (req.status == 200) { | |
2173 | caller.loadedEvent_(req.responseText); | |
2174 | } | |
6a1aa64f | 2175 | } |
285a6bda | 2176 | }; |
6a1aa64f | 2177 | |
285a6bda DV |
2178 | req.open("GET", this.file_, true); |
2179 | req.send(null); | |
2180 | } | |
2181 | } else { | |
2182 | this.error("Unknown data format: " + (typeof this.file_)); | |
6a1aa64f DV |
2183 | } |
2184 | }; | |
2185 | ||
2186 | /** | |
2187 | * Changes various properties of the graph. These can include: | |
2188 | * <ul> | |
2189 | * <li>file: changes the source data for the graph</li> | |
2190 | * <li>errorBars: changes whether the data contains stddev</li> | |
2191 | * </ul> | |
2192 | * @param {Object} attrs The new properties and values | |
2193 | */ | |
285a6bda DV |
2194 | Dygraph.prototype.updateOptions = function(attrs) { |
2195 | // TODO(danvk): this is a mess. Rethink this function. | |
6a1aa64f DV |
2196 | if (attrs.rollPeriod) { |
2197 | this.rollPeriod_ = attrs.rollPeriod; | |
2198 | } | |
2199 | if (attrs.dateWindow) { | |
2200 | this.dateWindow_ = attrs.dateWindow; | |
2201 | } | |
2202 | if (attrs.valueRange) { | |
2203 | this.valueRange_ = attrs.valueRange; | |
2204 | } | |
fc80a396 | 2205 | Dygraph.update(this.user_attrs_, attrs); |
87bb7958 | 2206 | Dygraph.update(this.renderOptions_, attrs); |
285a6bda DV |
2207 | |
2208 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
2209 | ||
2210 | // TODO(danvk): this doesn't match the constructor logic | |
2211 | this.layout_.updateOptions({ 'errorBars': this.attr_("errorBars") }); | |
5e50289f | 2212 | if (attrs['file']) { |
6a1aa64f DV |
2213 | this.file_ = attrs['file']; |
2214 | this.start_(); | |
2215 | } else { | |
2216 | this.drawGraph_(this.rawData_); | |
2217 | } | |
2218 | }; | |
2219 | ||
2220 | /** | |
697e70b2 DV |
2221 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
2222 | * containing div (which has presumably changed size since the dygraph was | |
2223 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
2224 | * |
2225 | * This is far more efficient than destroying and re-instantiating a | |
2226 | * Dygraph, since it doesn't have to reparse the underlying data. | |
2227 | * | |
697e70b2 DV |
2228 | * @param {Number} width Width (in pixels) |
2229 | * @param {Number} height Height (in pixels) | |
2230 | */ | |
2231 | Dygraph.prototype.resize = function(width, height) { | |
e8c7ef86 DV |
2232 | if (this.resize_lock) { |
2233 | return; | |
2234 | } | |
2235 | this.resize_lock = true; | |
2236 | ||
697e70b2 DV |
2237 | if ((width === null) != (height === null)) { |
2238 | this.warn("Dygraph.resize() should be called with zero parameters or " + | |
2239 | "two non-NULL parameters. Pretending it was zero."); | |
2240 | width = height = null; | |
2241 | } | |
2242 | ||
b16e6369 | 2243 | // TODO(danvk): there should be a clear() method. |
697e70b2 | 2244 | this.maindiv_.innerHTML = ""; |
b16e6369 DV |
2245 | this.attrs_.labelsDiv = null; |
2246 | ||
697e70b2 DV |
2247 | if (width) { |
2248 | this.maindiv_.style.width = width + "px"; | |
2249 | this.maindiv_.style.height = height + "px"; | |
2250 | this.width_ = width; | |
2251 | this.height_ = height; | |
2252 | } else { | |
2253 | this.width_ = this.maindiv_.offsetWidth; | |
2254 | this.height_ = this.maindiv_.offsetHeight; | |
2255 | } | |
2256 | ||
2257 | this.createInterface_(); | |
964f30c6 | 2258 | this.drawGraph_(this.rawData_); |
e8c7ef86 DV |
2259 | |
2260 | this.resize_lock = false; | |
697e70b2 DV |
2261 | }; |
2262 | ||
2263 | /** | |
6a1aa64f DV |
2264 | * Adjusts the number of days in the rolling average. Updates the graph to |
2265 | * reflect the new averaging period. | |
2266 | * @param {Number} length Number of days over which to average the data. | |
2267 | */ | |
285a6bda | 2268 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f DV |
2269 | this.rollPeriod_ = length; |
2270 | this.drawGraph_(this.rawData_); | |
2271 | }; | |
540d00f1 | 2272 | |
f8cfec73 | 2273 | /** |
1cf11047 DV |
2274 | * Returns a boolean array of visibility statuses. |
2275 | */ | |
2276 | Dygraph.prototype.visibility = function() { | |
2277 | // Do lazy-initialization, so that this happens after we know the number of | |
2278 | // data series. | |
2279 | if (!this.attr_("visibility")) { | |
f38dec01 | 2280 | this.attrs_["visibility"] = []; |
1cf11047 DV |
2281 | } |
2282 | while (this.attr_("visibility").length < this.rawData_[0].length - 1) { | |
f38dec01 | 2283 | this.attr_("visibility").push(true); |
1cf11047 DV |
2284 | } |
2285 | return this.attr_("visibility"); | |
2286 | }; | |
2287 | ||
2288 | /** | |
2289 | * Changes the visiblity of a series. | |
2290 | */ | |
2291 | Dygraph.prototype.setVisibility = function(num, value) { | |
2292 | var x = this.visibility(); | |
2293 | if (num < 0 && num >= x.length) { | |
2294 | this.warn("invalid series number in setVisibility: " + num); | |
2295 | } else { | |
2296 | x[num] = value; | |
2297 | this.drawGraph_(this.rawData_); | |
2298 | } | |
2299 | }; | |
2300 | ||
2301 | /** | |
f8cfec73 DV |
2302 | * Create a new canvas element. This is more complex than a simple |
2303 | * document.createElement("canvas") because of IE and excanvas. | |
2304 | */ | |
2305 | Dygraph.createCanvas = function() { | |
2306 | var canvas = document.createElement("canvas"); | |
2307 | ||
2308 | isIE = (/MSIE/.test(navigator.userAgent) && !window.opera); | |
2309 | if (isIE) { | |
2310 | canvas = G_vmlCanvasManager.initElement(canvas); | |
2311 | } | |
2312 | ||
2313 | return canvas; | |
2314 | }; | |
2315 | ||
540d00f1 DV |
2316 | |
2317 | /** | |
285a6bda | 2318 | * A wrapper around Dygraph that implements the gviz API. |
540d00f1 DV |
2319 | * @param {Object} container The DOM object the visualization should live in. |
2320 | */ | |
285a6bda | 2321 | Dygraph.GVizChart = function(container) { |
540d00f1 DV |
2322 | this.container = container; |
2323 | } | |
2324 | ||
285a6bda | 2325 | Dygraph.GVizChart.prototype.draw = function(data, options) { |
540d00f1 | 2326 | this.container.innerHTML = ''; |
285a6bda | 2327 | this.date_graph = new Dygraph(this.container, data, options); |
540d00f1 | 2328 | } |
285a6bda | 2329 | |
239c712d NAG |
2330 | /** |
2331 | * Google charts compatible setSelection | |
50360fd0 | 2332 | * Only row selection is supported, all points in the row will be highlighted |
239c712d NAG |
2333 | * @param {Array} array of the selected cells |
2334 | * @public | |
2335 | */ | |
2336 | Dygraph.GVizChart.prototype.setSelection = function(selection_array) { | |
2337 | var row = false; | |
2338 | if (selection_array.length) { | |
2339 | row = selection_array[0].row; | |
2340 | } | |
2341 | this.date_graph.setSelection(row); | |
2342 | } | |
2343 | ||
103b7292 NAG |
2344 | /** |
2345 | * Google charts compatible getSelection implementation | |
2346 | * @return {Array} array of the selected cells | |
2347 | * @public | |
2348 | */ | |
2349 | Dygraph.GVizChart.prototype.getSelection = function() { | |
2350 | var selection = []; | |
50360fd0 | 2351 | |
103b7292 | 2352 | var row = this.date_graph.getSelection(); |
50360fd0 | 2353 | |
103b7292 | 2354 | if (row < 0) return selection; |
50360fd0 | 2355 | |
103b7292 NAG |
2356 | col = 1; |
2357 | for (var i in this.date_graph.layout_.datasets) { | |
2358 | selection.push({row: row, column: col}); | |
2359 | col++; | |
2360 | } | |
2361 | ||
2362 | return selection; | |
2363 | } | |
2364 | ||
285a6bda DV |
2365 | // Older pages may still use this name. |
2366 | DateGraph = Dygraph; |