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6a1aa64f DV |
1 | // Copyright 2006 Dan Vanderkam (danvdk@gmail.com) |
2 | // All Rights Reserved. | |
3 | ||
4 | /** | |
5 | * @fileoverview Creates an interactive, zoomable graph based on a CSV file or | |
285a6bda DV |
6 | * string. Dygraph can handle multiple series with or without error bars. The |
7 | * date/value ranges will be automatically set. Dygraph uses the | |
6a1aa64f DV |
8 | * <canvas> tag, so it only works in FF1.5+. |
9 | * @author danvdk@gmail.com (Dan Vanderkam) | |
10 | ||
11 | Usage: | |
12 | <div id="graphdiv" style="width:800px; height:500px;"></div> | |
13 | <script type="text/javascript"> | |
285a6bda DV |
14 | new Dygraph(document.getElementById("graphdiv"), |
15 | "datafile.csv", // CSV file with headers | |
16 | { }); // options | |
6a1aa64f DV |
17 | </script> |
18 | ||
19 | The CSV file is of the form | |
20 | ||
285a6bda | 21 | Date,SeriesA,SeriesB,SeriesC |
6a1aa64f DV |
22 | YYYYMMDD,A1,B1,C1 |
23 | YYYYMMDD,A2,B2,C2 | |
24 | ||
6a1aa64f DV |
25 | If the 'errorBars' option is set in the constructor, the input should be of |
26 | the form | |
27 | ||
285a6bda | 28 | Date,SeriesA,SeriesB,... |
6a1aa64f DV |
29 | YYYYMMDD,A1,sigmaA1,B1,sigmaB1,... |
30 | YYYYMMDD,A2,sigmaA2,B2,sigmaB2,... | |
31 | ||
32 | If the 'fractions' option is set, the input should be of the form: | |
33 | ||
285a6bda | 34 | Date,SeriesA,SeriesB,... |
6a1aa64f DV |
35 | YYYYMMDD,A1/B1,A2/B2,... |
36 | YYYYMMDD,A1/B1,A2/B2,... | |
37 | ||
38 | And error bars will be calculated automatically using a binomial distribution. | |
39 | ||
285a6bda | 40 | For further documentation and examples, see http://www.danvk.org/dygraphs |
6a1aa64f DV |
41 | |
42 | */ | |
43 | ||
44 | /** | |
45 | * An interactive, zoomable graph | |
46 | * @param {String | Function} file A file containing CSV data or a function that | |
47 | * returns this data. The expected format for each line is | |
48 | * YYYYMMDD,val1,val2,... or, if attrs.errorBars is set, | |
49 | * YYYYMMDD,val1,stddev1,val2,stddev2,... | |
6a1aa64f DV |
50 | * @param {Object} attrs Various other attributes, e.g. errorBars determines |
51 | * whether the input data contains error ranges. | |
52 | */ | |
285a6bda DV |
53 | Dygraph = function(div, data, opts) { |
54 | if (arguments.length > 0) { | |
55 | if (arguments.length == 4) { | |
56 | // Old versions of dygraphs took in the series labels as a constructor | |
57 | // parameter. This doesn't make sense anymore, but it's easy to continue | |
58 | // to support this usage. | |
59 | this.warn("Using deprecated four-argument dygraph constructor"); | |
60 | this.__old_init__(div, data, arguments[2], arguments[3]); | |
61 | } else { | |
62 | this.__init__(div, data, opts); | |
63 | } | |
64 | } | |
6a1aa64f DV |
65 | }; |
66 | ||
285a6bda DV |
67 | Dygraph.NAME = "Dygraph"; |
68 | Dygraph.VERSION = "1.2"; | |
69 | Dygraph.__repr__ = function() { | |
6a1aa64f DV |
70 | return "[" + this.NAME + " " + this.VERSION + "]"; |
71 | }; | |
285a6bda | 72 | Dygraph.toString = function() { |
6a1aa64f DV |
73 | return this.__repr__(); |
74 | }; | |
75 | ||
76 | // Various default values | |
285a6bda DV |
77 | Dygraph.DEFAULT_ROLL_PERIOD = 1; |
78 | Dygraph.DEFAULT_WIDTH = 480; | |
79 | Dygraph.DEFAULT_HEIGHT = 320; | |
80 | Dygraph.AXIS_LINE_WIDTH = 0.3; | |
6a1aa64f | 81 | |
8e4a6af3 | 82 | // Default attribute values. |
285a6bda | 83 | Dygraph.DEFAULT_ATTRS = { |
a9fc39ab | 84 | highlightCircleSize: 3, |
8e4a6af3 | 85 | pixelsPerXLabel: 60, |
c6336f04 | 86 | pixelsPerYLabel: 30, |
285a6bda | 87 | |
8e4a6af3 DV |
88 | labelsDivWidth: 250, |
89 | labelsDivStyles: { | |
90 | // TODO(danvk): move defaults from createStatusMessage_ here. | |
285a6bda DV |
91 | }, |
92 | labelsSeparateLines: false, | |
93 | labelsKMB: false, | |
afefbcdb | 94 | labelsKMG2: false, |
285a6bda DV |
95 | |
96 | strokeWidth: 1.0, | |
8e4a6af3 | 97 | |
8846615a DV |
98 | axisTickSize: 3, |
99 | axisLabelFontSize: 14, | |
100 | xAxisLabelWidth: 50, | |
101 | yAxisLabelWidth: 50, | |
102 | rightGap: 5, | |
285a6bda DV |
103 | |
104 | showRoller: false, | |
105 | xValueFormatter: Dygraph.dateString_, | |
106 | xValueParser: Dygraph.dateParser, | |
107 | xTicker: Dygraph.dateTicker, | |
108 | ||
3d67f03b DV |
109 | delimiter: ',', |
110 | ||
ff00d3e2 | 111 | logScale: false, |
285a6bda DV |
112 | sigma: 2.0, |
113 | errorBars: false, | |
114 | fractions: false, | |
115 | wilsonInterval: true, // only relevant if fractions is true | |
5954ef32 | 116 | customBars: false, |
43af96e7 NK |
117 | fillGraph: false, |
118 | fillAlpha: 0.15, | |
119 | ||
120 | stackedGraph: false, | |
121 | hideOverlayOnMouseOut: true | |
285a6bda DV |
122 | }; |
123 | ||
124 | // Various logging levels. | |
125 | Dygraph.DEBUG = 1; | |
126 | Dygraph.INFO = 2; | |
127 | Dygraph.WARNING = 3; | |
128 | Dygraph.ERROR = 3; | |
129 | ||
130 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { | |
131 | // Labels is no longer a constructor parameter, since it's typically set | |
132 | // directly from the data source. It also conains a name for the x-axis, | |
133 | // which the previous constructor form did not. | |
134 | if (labels != null) { | |
135 | var new_labels = ["Date"]; | |
136 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); | |
fc80a396 | 137 | Dygraph.update(attrs, { 'labels': new_labels }); |
285a6bda DV |
138 | } |
139 | this.__init__(div, file, attrs); | |
8e4a6af3 DV |
140 | }; |
141 | ||
6a1aa64f | 142 | /** |
285a6bda | 143 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
6a1aa64f DV |
144 | * and interaction <canvas> inside of it. See the constructor for details |
145 | * on the parameters. | |
146 | * @param {String | Function} file Source data | |
147 | * @param {Array.<String>} labels Names of the data series | |
148 | * @param {Object} attrs Miscellaneous other options | |
149 | * @private | |
150 | */ | |
285a6bda DV |
151 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
152 | // Support two-argument constructor | |
153 | if (attrs == null) { attrs = {}; } | |
154 | ||
6a1aa64f | 155 | // Copy the important bits into the object |
32988383 | 156 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
6a1aa64f | 157 | this.maindiv_ = div; |
6a1aa64f | 158 | this.file_ = file; |
285a6bda | 159 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
6a1aa64f | 160 | this.previousVerticalX_ = -1; |
6a1aa64f | 161 | this.fractions_ = attrs.fractions || false; |
6a1aa64f DV |
162 | this.dateWindow_ = attrs.dateWindow || null; |
163 | this.valueRange_ = attrs.valueRange || null; | |
6a1aa64f | 164 | this.wilsonInterval_ = attrs.wilsonInterval || true; |
fe0b7c03 | 165 | this.is_initial_draw_ = true; |
8e4a6af3 | 166 | |
f7d6278e DV |
167 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
168 | // div, then only one will be drawn. | |
169 | div.innerHTML = ""; | |
170 | ||
c21d2c2d | 171 | // If the div isn't already sized then inherit from our attrs or |
172 | // give it a default size. | |
285a6bda | 173 | if (div.style.width == '') { |
c21d2c2d | 174 | div.style.width = attrs.width || Dygraph.DEFAULT_WIDTH + "px"; |
285a6bda DV |
175 | } |
176 | if (div.style.height == '') { | |
c21d2c2d | 177 | div.style.height = attrs.height || Dygraph.DEFAULT_HEIGHT + "px"; |
32988383 | 178 | } |
285a6bda DV |
179 | this.width_ = parseInt(div.style.width, 10); |
180 | this.height_ = parseInt(div.style.height, 10); | |
c21d2c2d | 181 | // The div might have been specified as percent of the current window size, |
182 | // convert that to an appropriate number of pixels. | |
183 | if (div.style.width.indexOf("%") == div.style.width.length - 1) { | |
184 | // Minus ten pixels keeps scrollbars from showing up for a 100% width div. | |
185 | this.width_ = (this.width_ * self.innerWidth / 100) - 10; | |
186 | } | |
187 | if (div.style.height.indexOf("%") == div.style.height.length - 1) { | |
188 | this.height_ = (this.height_ * self.innerHeight / 100) - 10; | |
189 | } | |
32988383 | 190 | |
344ba8c0 | 191 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
43af96e7 NK |
192 | if (attrs['stackedGraph']) { |
193 | attrs['fillGraph'] = true; | |
194 | // TODO(nikhilk): Add any other stackedGraph checks here. | |
195 | } | |
196 | ||
285a6bda DV |
197 | // Dygraphs has many options, some of which interact with one another. |
198 | // To keep track of everything, we maintain two sets of options: | |
199 | // | |
c21d2c2d | 200 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
201 | // this.attrs_ defaults, options derived from user_attrs_, data. |
202 | // | |
203 | // Options are then accessed this.attr_('attr'), which first looks at | |
204 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
205 | // defaults without overriding behavior that the user specifically asks for. | |
206 | this.user_attrs_ = {}; | |
fc80a396 | 207 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 208 | |
285a6bda | 209 | this.attrs_ = {}; |
fc80a396 | 210 | Dygraph.update(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 211 | |
285a6bda DV |
212 | // Make a note of whether labels will be pulled from the CSV file. |
213 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
6a1aa64f DV |
214 | |
215 | // Create the containing DIV and other interactive elements | |
216 | this.createInterface_(); | |
217 | ||
738fc797 | 218 | this.start_(); |
6a1aa64f DV |
219 | }; |
220 | ||
285a6bda DV |
221 | Dygraph.prototype.attr_ = function(name) { |
222 | if (typeof(this.user_attrs_[name]) != 'undefined') { | |
223 | return this.user_attrs_[name]; | |
224 | } else if (typeof(this.attrs_[name]) != 'undefined') { | |
225 | return this.attrs_[name]; | |
226 | } else { | |
227 | return null; | |
228 | } | |
229 | }; | |
230 | ||
231 | // TODO(danvk): any way I can get the line numbers to be this.warn call? | |
232 | Dygraph.prototype.log = function(severity, message) { | |
233 | if (typeof(console) != 'undefined') { | |
234 | switch (severity) { | |
235 | case Dygraph.DEBUG: | |
236 | console.debug('dygraphs: ' + message); | |
237 | break; | |
238 | case Dygraph.INFO: | |
239 | console.info('dygraphs: ' + message); | |
240 | break; | |
241 | case Dygraph.WARNING: | |
242 | console.warn('dygraphs: ' + message); | |
243 | break; | |
244 | case Dygraph.ERROR: | |
245 | console.error('dygraphs: ' + message); | |
246 | break; | |
247 | } | |
248 | } | |
249 | } | |
250 | Dygraph.prototype.info = function(message) { | |
251 | this.log(Dygraph.INFO, message); | |
252 | } | |
253 | Dygraph.prototype.warn = function(message) { | |
254 | this.log(Dygraph.WARNING, message); | |
255 | } | |
256 | Dygraph.prototype.error = function(message) { | |
257 | this.log(Dygraph.ERROR, message); | |
258 | } | |
259 | ||
6a1aa64f DV |
260 | /** |
261 | * Returns the current rolling period, as set by the user or an option. | |
262 | * @return {Number} The number of days in the rolling window | |
263 | */ | |
285a6bda | 264 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 265 | return this.rollPeriod_; |
76171648 DV |
266 | }; |
267 | ||
599fb4ad DV |
268 | /** |
269 | * Returns the currently-visible x-range. This can be affected by zooming, | |
270 | * panning or a call to updateOptions. | |
271 | * Returns a two-element array: [left, right]. | |
272 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
273 | */ | |
274 | Dygraph.prototype.xAxisRange = function() { | |
275 | if (this.dateWindow_) return this.dateWindow_; | |
276 | ||
277 | // The entire chart is visible. | |
278 | var left = this.rawData_[0][0]; | |
279 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
280 | return [left, right]; | |
281 | }; | |
282 | ||
76171648 DV |
283 | Dygraph.addEvent = function(el, evt, fn) { |
284 | var normed_fn = function(e) { | |
285 | if (!e) var e = window.event; | |
286 | fn(e); | |
287 | }; | |
288 | if (window.addEventListener) { // Mozilla, Netscape, Firefox | |
289 | el.addEventListener(evt, normed_fn, false); | |
290 | } else { // IE | |
291 | el.attachEvent('on' + evt, normed_fn); | |
292 | } | |
293 | }; | |
6a1aa64f DV |
294 | |
295 | /** | |
285a6bda | 296 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 297 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 298 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
299 | * @private |
300 | */ | |
285a6bda | 301 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
302 | // Create the all-enclosing graph div |
303 | var enclosing = this.maindiv_; | |
304 | ||
b0c3b730 DV |
305 | this.graphDiv = document.createElement("div"); |
306 | this.graphDiv.style.width = this.width_ + "px"; | |
307 | this.graphDiv.style.height = this.height_ + "px"; | |
308 | enclosing.appendChild(this.graphDiv); | |
309 | ||
310 | // Create the canvas for interactive parts of the chart. | |
f8cfec73 | 311 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 DV |
312 | this.canvas_.style.position = "absolute"; |
313 | this.canvas_.width = this.width_; | |
314 | this.canvas_.height = this.height_; | |
f8cfec73 DV |
315 | this.canvas_.style.width = this.width_ + "px"; // for IE |
316 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
b0c3b730 DV |
317 | this.graphDiv.appendChild(this.canvas_); |
318 | ||
319 | // ... and for static parts of the chart. | |
6a1aa64f | 320 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
76171648 DV |
321 | |
322 | var dygraph = this; | |
323 | Dygraph.addEvent(this.hidden_, 'mousemove', function(e) { | |
324 | dygraph.mouseMove_(e); | |
325 | }); | |
326 | Dygraph.addEvent(this.hidden_, 'mouseout', function(e) { | |
327 | dygraph.mouseOut_(e); | |
328 | }); | |
697e70b2 DV |
329 | |
330 | // Create the grapher | |
331 | // TODO(danvk): why does the Layout need its own set of options? | |
332 | this.layoutOptions_ = { 'xOriginIsZero': false }; | |
333 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
334 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
335 | Dygraph.update(this.layoutOptions_, { | |
336 | 'errorBars': (this.attr_("errorBars") || this.attr_("customBars")) }); | |
337 | ||
338 | this.layout_ = new DygraphLayout(this, this.layoutOptions_); | |
339 | ||
340 | // TODO(danvk): why does the Renderer need its own set of options? | |
341 | this.renderOptions_ = { colorScheme: this.colors_, | |
342 | strokeColor: null, | |
343 | axisLineWidth: Dygraph.AXIS_LINE_WIDTH }; | |
344 | Dygraph.update(this.renderOptions_, this.attrs_); | |
345 | Dygraph.update(this.renderOptions_, this.user_attrs_); | |
346 | this.plotter_ = new DygraphCanvasRenderer(this, | |
347 | this.hidden_, this.layout_, | |
348 | this.renderOptions_); | |
349 | ||
350 | this.createStatusMessage_(); | |
351 | this.createRollInterface_(); | |
352 | this.createDragInterface_(); | |
4cfcc38c DV |
353 | }; |
354 | ||
355 | /** | |
356 | * Detach DOM elements in the dygraph and null out all data references. | |
357 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
358 | * usage. See, e.g., the tests/perf.html example. | |
359 | */ | |
360 | Dygraph.prototype.destroy = function() { | |
361 | var removeRecursive = function(node) { | |
362 | while (node.hasChildNodes()) { | |
363 | removeRecursive(node.firstChild); | |
364 | node.removeChild(node.firstChild); | |
365 | } | |
366 | }; | |
367 | removeRecursive(this.maindiv_); | |
368 | ||
369 | var nullOut = function(obj) { | |
370 | for (var n in obj) { | |
371 | if (typeof(obj[n]) === 'object') { | |
372 | obj[n] = null; | |
373 | } | |
374 | } | |
375 | }; | |
376 | ||
377 | // These may not all be necessary, but it can't hurt... | |
378 | nullOut(this.layout_); | |
379 | nullOut(this.plotter_); | |
380 | nullOut(this); | |
381 | }; | |
6a1aa64f DV |
382 | |
383 | /** | |
384 | * Creates the canvas containing the PlotKit graph. Only plotkit ever draws on | |
285a6bda | 385 | * this particular canvas. All Dygraph work is done on this.canvas_. |
8846615a | 386 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
387 | * @return {Object} The newly-created canvas |
388 | * @private | |
389 | */ | |
285a6bda | 390 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 DV |
391 | // var h = document.createElement("canvas"); |
392 | var h = Dygraph.createCanvas(); | |
6a1aa64f DV |
393 | h.style.position = "absolute"; |
394 | h.style.top = canvas.style.top; | |
395 | h.style.left = canvas.style.left; | |
396 | h.width = this.width_; | |
397 | h.height = this.height_; | |
f8cfec73 DV |
398 | h.style.width = this.width_ + "px"; // for IE |
399 | h.style.height = this.height_ + "px"; // for IE | |
b0c3b730 | 400 | this.graphDiv.appendChild(h); |
6a1aa64f DV |
401 | return h; |
402 | }; | |
403 | ||
f474c2a3 DV |
404 | // Taken from MochiKit.Color |
405 | Dygraph.hsvToRGB = function (hue, saturation, value) { | |
406 | var red; | |
407 | var green; | |
408 | var blue; | |
409 | if (saturation === 0) { | |
410 | red = value; | |
411 | green = value; | |
412 | blue = value; | |
413 | } else { | |
414 | var i = Math.floor(hue * 6); | |
415 | var f = (hue * 6) - i; | |
416 | var p = value * (1 - saturation); | |
417 | var q = value * (1 - (saturation * f)); | |
418 | var t = value * (1 - (saturation * (1 - f))); | |
419 | switch (i) { | |
420 | case 1: red = q; green = value; blue = p; break; | |
421 | case 2: red = p; green = value; blue = t; break; | |
422 | case 3: red = p; green = q; blue = value; break; | |
423 | case 4: red = t; green = p; blue = value; break; | |
424 | case 5: red = value; green = p; blue = q; break; | |
425 | case 6: // fall through | |
426 | case 0: red = value; green = t; blue = p; break; | |
427 | } | |
428 | } | |
429 | red = Math.floor(255 * red + 0.5); | |
430 | green = Math.floor(255 * green + 0.5); | |
431 | blue = Math.floor(255 * blue + 0.5); | |
432 | return 'rgb(' + red + ',' + green + ',' + blue + ')'; | |
433 | }; | |
434 | ||
435 | ||
6a1aa64f DV |
436 | /** |
437 | * Generate a set of distinct colors for the data series. This is done with a | |
438 | * color wheel. Saturation/Value are customizable, and the hue is | |
439 | * equally-spaced around the color wheel. If a custom set of colors is | |
440 | * specified, that is used instead. | |
6a1aa64f DV |
441 | * @private |
442 | */ | |
285a6bda DV |
443 | Dygraph.prototype.setColors_ = function() { |
444 | // TODO(danvk): compute this directly into this.attrs_['colorScheme'] and do | |
445 | // away with this.renderOptions_. | |
446 | var num = this.attr_("labels").length - 1; | |
6a1aa64f | 447 | this.colors_ = []; |
285a6bda DV |
448 | var colors = this.attr_('colors'); |
449 | if (!colors) { | |
450 | var sat = this.attr_('colorSaturation') || 1.0; | |
451 | var val = this.attr_('colorValue') || 0.5; | |
6a1aa64f | 452 | for (var i = 1; i <= num; i++) { |
ec1959eb | 453 | if (!this.visibility()[i-1]) continue; |
43af96e7 NK |
454 | // alternate colors for high contrast. |
455 | var idx = i - parseInt(i % 2 ? i / 2 : (i - num)/2, 10); | |
456 | var hue = (1.0 * idx/ (1 + num)); | |
457 | this.colors_.push(Dygraph.hsvToRGB(hue, sat, val)); | |
6a1aa64f DV |
458 | } |
459 | } else { | |
460 | for (var i = 0; i < num; i++) { | |
ec1959eb | 461 | if (!this.visibility()[i]) continue; |
285a6bda | 462 | var colorStr = colors[i % colors.length]; |
f474c2a3 | 463 | this.colors_.push(colorStr); |
6a1aa64f DV |
464 | } |
465 | } | |
285a6bda | 466 | |
c21d2c2d | 467 | // TODO(danvk): update this w/r/t/ the new options system. |
285a6bda | 468 | this.renderOptions_.colorScheme = this.colors_; |
fc80a396 DV |
469 | Dygraph.update(this.plotter_.options, this.renderOptions_); |
470 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
471 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
6a1aa64f DV |
472 | } |
473 | ||
43af96e7 NK |
474 | /** |
475 | * Return the list of colors. This is either the list of colors passed in the | |
476 | * attributes, or the autogenerated list of rgb(r,g,b) strings. | |
477 | * @return {Array<string>} The list of colors. | |
478 | */ | |
479 | Dygraph.prototype.getColors = function() { | |
480 | return this.colors_; | |
481 | }; | |
482 | ||
5e60386d DV |
483 | // The following functions are from quirksmode.org with a modification for Safari from |
484 | // http://blog.firetree.net/2005/07/04/javascript-find-position/ | |
3df0ccf0 DV |
485 | // http://www.quirksmode.org/js/findpos.html |
486 | Dygraph.findPosX = function(obj) { | |
487 | var curleft = 0; | |
5e60386d DV |
488 | if(obj.offsetParent) |
489 | while(1) | |
490 | { | |
3df0ccf0 | 491 | curleft += obj.offsetLeft; |
5e60386d DV |
492 | if(!obj.offsetParent) |
493 | break; | |
3df0ccf0 DV |
494 | obj = obj.offsetParent; |
495 | } | |
5e60386d | 496 | else if(obj.x) |
3df0ccf0 DV |
497 | curleft += obj.x; |
498 | return curleft; | |
499 | }; | |
c21d2c2d | 500 | |
3df0ccf0 DV |
501 | Dygraph.findPosY = function(obj) { |
502 | var curtop = 0; | |
5e60386d DV |
503 | if(obj.offsetParent) |
504 | while(1) | |
505 | { | |
3df0ccf0 | 506 | curtop += obj.offsetTop; |
5e60386d DV |
507 | if(!obj.offsetParent) |
508 | break; | |
3df0ccf0 DV |
509 | obj = obj.offsetParent; |
510 | } | |
5e60386d | 511 | else if(obj.y) |
3df0ccf0 DV |
512 | curtop += obj.y; |
513 | return curtop; | |
514 | }; | |
515 | ||
5e60386d | 516 | |
71a11a8e | 517 | |
6a1aa64f DV |
518 | /** |
519 | * Create the div that contains information on the selected point(s) | |
520 | * This goes in the top right of the canvas, unless an external div has already | |
521 | * been specified. | |
522 | * @private | |
523 | */ | |
285a6bda DV |
524 | Dygraph.prototype.createStatusMessage_ = function(){ |
525 | if (!this.attr_("labelsDiv")) { | |
526 | var divWidth = this.attr_('labelsDivWidth'); | |
b0c3b730 | 527 | var messagestyle = { |
6a1aa64f DV |
528 | "position": "absolute", |
529 | "fontSize": "14px", | |
530 | "zIndex": 10, | |
531 | "width": divWidth + "px", | |
532 | "top": "0px", | |
8846615a | 533 | "left": (this.width_ - divWidth - 2) + "px", |
6a1aa64f DV |
534 | "background": "white", |
535 | "textAlign": "left", | |
b0c3b730 | 536 | "overflow": "hidden"}; |
fc80a396 | 537 | Dygraph.update(messagestyle, this.attr_('labelsDivStyles')); |
b0c3b730 DV |
538 | var div = document.createElement("div"); |
539 | for (var name in messagestyle) { | |
85b99f0b DV |
540 | if (messagestyle.hasOwnProperty(name)) { |
541 | div.style[name] = messagestyle[name]; | |
542 | } | |
b0c3b730 DV |
543 | } |
544 | this.graphDiv.appendChild(div); | |
285a6bda | 545 | this.attrs_.labelsDiv = div; |
6a1aa64f DV |
546 | } |
547 | }; | |
548 | ||
549 | /** | |
550 | * Create the text box to adjust the averaging period | |
551 | * @return {Object} The newly-created text box | |
552 | * @private | |
553 | */ | |
285a6bda | 554 | Dygraph.prototype.createRollInterface_ = function() { |
285a6bda | 555 | var display = this.attr_('showRoller') ? "block" : "none"; |
b0c3b730 DV |
556 | var textAttr = { "position": "absolute", |
557 | "zIndex": 10, | |
558 | "top": (this.plotter_.area.h - 25) + "px", | |
559 | "left": (this.plotter_.area.x + 1) + "px", | |
560 | "display": display | |
6a1aa64f | 561 | }; |
b0c3b730 DV |
562 | var roller = document.createElement("input"); |
563 | roller.type = "text"; | |
564 | roller.size = "2"; | |
565 | roller.value = this.rollPeriod_; | |
566 | for (var name in textAttr) { | |
85b99f0b DV |
567 | if (textAttr.hasOwnProperty(name)) { |
568 | roller.style[name] = textAttr[name]; | |
569 | } | |
b0c3b730 DV |
570 | } |
571 | ||
6a1aa64f | 572 | var pa = this.graphDiv; |
b0c3b730 | 573 | pa.appendChild(roller); |
76171648 DV |
574 | var dygraph = this; |
575 | roller.onchange = function() { dygraph.adjustRoll(roller.value); }; | |
6a1aa64f | 576 | return roller; |
76171648 DV |
577 | }; |
578 | ||
579 | // These functions are taken from MochiKit.Signal | |
580 | Dygraph.pageX = function(e) { | |
581 | if (e.pageX) { | |
582 | return (!e.pageX || e.pageX < 0) ? 0 : e.pageX; | |
583 | } else { | |
584 | var de = document; | |
585 | var b = document.body; | |
586 | return e.clientX + | |
587 | (de.scrollLeft || b.scrollLeft) - | |
588 | (de.clientLeft || 0); | |
589 | } | |
590 | }; | |
591 | ||
592 | Dygraph.pageY = function(e) { | |
593 | if (e.pageY) { | |
594 | return (!e.pageY || e.pageY < 0) ? 0 : e.pageY; | |
595 | } else { | |
596 | var de = document; | |
597 | var b = document.body; | |
598 | return e.clientY + | |
599 | (de.scrollTop || b.scrollTop) - | |
600 | (de.clientTop || 0); | |
601 | } | |
602 | }; | |
6a1aa64f DV |
603 | |
604 | /** | |
605 | * Set up all the mouse handlers needed to capture dragging behavior for zoom | |
27385109 | 606 | * events. |
6a1aa64f DV |
607 | * @private |
608 | */ | |
285a6bda | 609 | Dygraph.prototype.createDragInterface_ = function() { |
6a1aa64f DV |
610 | var self = this; |
611 | ||
612 | // Tracks whether the mouse is down right now | |
bce01b0f | 613 | var isZooming = false; |
c776c216 | 614 | var isPanning = false; |
6a1aa64f DV |
615 | var dragStartX = null; |
616 | var dragStartY = null; | |
617 | var dragEndX = null; | |
618 | var dragEndY = null; | |
619 | var prevEndX = null; | |
bce01b0f DV |
620 | var draggingDate = null; |
621 | var dateRange = null; | |
6a1aa64f DV |
622 | |
623 | // Utility function to convert page-wide coordinates to canvas coords | |
67e650dc DV |
624 | var px = 0; |
625 | var py = 0; | |
76171648 DV |
626 | var getX = function(e) { return Dygraph.pageX(e) - px }; |
627 | var getY = function(e) { return Dygraph.pageX(e) - py }; | |
6a1aa64f DV |
628 | |
629 | // Draw zoom rectangles when the mouse is down and the user moves around | |
76171648 | 630 | Dygraph.addEvent(this.hidden_, 'mousemove', function(event) { |
bce01b0f | 631 | if (isZooming) { |
6a1aa64f DV |
632 | dragEndX = getX(event); |
633 | dragEndY = getY(event); | |
634 | ||
635 | self.drawZoomRect_(dragStartX, dragEndX, prevEndX); | |
636 | prevEndX = dragEndX; | |
bce01b0f DV |
637 | } else if (isPanning) { |
638 | dragEndX = getX(event); | |
639 | dragEndY = getY(event); | |
640 | ||
641 | // Want to have it so that: | |
642 | // 1. draggingDate appears at dragEndX | |
643 | // 2. daterange = (dateWindow_[1] - dateWindow_[0]) is unaltered. | |
644 | ||
645 | self.dateWindow_[0] = draggingDate - (dragEndX / self.width_) * dateRange; | |
646 | self.dateWindow_[1] = self.dateWindow_[0] + dateRange; | |
647 | self.drawGraph_(self.rawData_); | |
6a1aa64f DV |
648 | } |
649 | }); | |
650 | ||
651 | // Track the beginning of drag events | |
76171648 | 652 | Dygraph.addEvent(this.hidden_, 'mousedown', function(event) { |
3df0ccf0 DV |
653 | px = Dygraph.findPosX(self.canvas_); |
654 | py = Dygraph.findPosY(self.canvas_); | |
6a1aa64f DV |
655 | dragStartX = getX(event); |
656 | dragStartY = getY(event); | |
bce01b0f | 657 | |
2dab69c3 | 658 | if (event.altKey || event.shiftKey) { |
d12999d3 | 659 | if (!self.dateWindow_) return; // have to be zoomed in to pan. |
bce01b0f DV |
660 | isPanning = true; |
661 | dateRange = self.dateWindow_[1] - self.dateWindow_[0]; | |
d12999d3 DV |
662 | draggingDate = (dragStartX / self.width_) * dateRange + |
663 | self.dateWindow_[0]; | |
bce01b0f DV |
664 | } else { |
665 | isZooming = true; | |
666 | } | |
6a1aa64f DV |
667 | }); |
668 | ||
669 | // If the user releases the mouse button during a drag, but not over the | |
670 | // canvas, then it doesn't count as a zooming action. | |
76171648 | 671 | Dygraph.addEvent(document, 'mouseup', function(event) { |
bce01b0f DV |
672 | if (isZooming || isPanning) { |
673 | isZooming = false; | |
6a1aa64f DV |
674 | dragStartX = null; |
675 | dragStartY = null; | |
676 | } | |
bce01b0f DV |
677 | |
678 | if (isPanning) { | |
679 | isPanning = false; | |
680 | draggingDate = null; | |
681 | dateRange = null; | |
682 | } | |
6a1aa64f DV |
683 | }); |
684 | ||
685 | // Temporarily cancel the dragging event when the mouse leaves the graph | |
76171648 | 686 | Dygraph.addEvent(this.hidden_, 'mouseout', function(event) { |
bce01b0f | 687 | if (isZooming) { |
6a1aa64f DV |
688 | dragEndX = null; |
689 | dragEndY = null; | |
690 | } | |
691 | }); | |
692 | ||
693 | // If the mouse is released on the canvas during a drag event, then it's a | |
694 | // zoom. Only do the zoom if it's over a large enough area (>= 10 pixels) | |
76171648 | 695 | Dygraph.addEvent(this.hidden_, 'mouseup', function(event) { |
bce01b0f DV |
696 | if (isZooming) { |
697 | isZooming = false; | |
6a1aa64f DV |
698 | dragEndX = getX(event); |
699 | dragEndY = getY(event); | |
700 | var regionWidth = Math.abs(dragEndX - dragStartX); | |
701 | var regionHeight = Math.abs(dragEndY - dragStartY); | |
702 | ||
703 | if (regionWidth < 2 && regionHeight < 2 && | |
285a6bda | 704 | self.attr_('clickCallback') != null && |
6a1aa64f | 705 | self.lastx_ != undefined) { |
b258a3da DV |
706 | // TODO(danvk): pass along more info about the points. |
707 | self.attr_('clickCallback')(event, self.lastx_, self.selPoints_); | |
6a1aa64f DV |
708 | } |
709 | ||
710 | if (regionWidth >= 10) { | |
711 | self.doZoom_(Math.min(dragStartX, dragEndX), | |
712 | Math.max(dragStartX, dragEndX)); | |
713 | } else { | |
714 | self.canvas_.getContext("2d").clearRect(0, 0, | |
715 | self.canvas_.width, | |
716 | self.canvas_.height); | |
717 | } | |
718 | ||
719 | dragStartX = null; | |
720 | dragStartY = null; | |
721 | } | |
bce01b0f DV |
722 | |
723 | if (isPanning) { | |
724 | isPanning = false; | |
725 | draggingDate = null; | |
726 | dateRange = null; | |
727 | } | |
6a1aa64f DV |
728 | }); |
729 | ||
730 | // Double-clicking zooms back out | |
76171648 | 731 | Dygraph.addEvent(this.hidden_, 'dblclick', function(event) { |
b258a3da | 732 | if (self.dateWindow_ == null) return; |
6a1aa64f DV |
733 | self.dateWindow_ = null; |
734 | self.drawGraph_(self.rawData_); | |
735 | var minDate = self.rawData_[0][0]; | |
736 | var maxDate = self.rawData_[self.rawData_.length - 1][0]; | |
285a6bda DV |
737 | if (self.attr_("zoomCallback")) { |
738 | self.attr_("zoomCallback")(minDate, maxDate); | |
67e650dc | 739 | } |
6a1aa64f DV |
740 | }); |
741 | }; | |
742 | ||
743 | /** | |
744 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
745 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
746 | * avoid extra redrawing, but it's tricky to avoid interactions with the status | |
747 | * dots. | |
748 | * @param {Number} startX The X position where the drag started, in canvas | |
749 | * coordinates. | |
750 | * @param {Number} endX The current X position of the drag, in canvas coords. | |
751 | * @param {Number} prevEndX The value of endX on the previous call to this | |
752 | * function. Used to avoid excess redrawing | |
753 | * @private | |
754 | */ | |
285a6bda | 755 | Dygraph.prototype.drawZoomRect_ = function(startX, endX, prevEndX) { |
6a1aa64f DV |
756 | var ctx = this.canvas_.getContext("2d"); |
757 | ||
758 | // Clean up from the previous rect if necessary | |
759 | if (prevEndX) { | |
760 | ctx.clearRect(Math.min(startX, prevEndX), 0, | |
761 | Math.abs(startX - prevEndX), this.height_); | |
762 | } | |
763 | ||
764 | // Draw a light-grey rectangle to show the new viewing area | |
765 | if (endX && startX) { | |
766 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
767 | ctx.fillRect(Math.min(startX, endX), 0, | |
768 | Math.abs(endX - startX), this.height_); | |
769 | } | |
770 | }; | |
771 | ||
772 | /** | |
773 | * Zoom to something containing [lowX, highX]. These are pixel coordinates | |
774 | * in the canvas. The exact zoom window may be slightly larger if there are no | |
775 | * data points near lowX or highX. This function redraws the graph. | |
776 | * @param {Number} lowX The leftmost pixel value that should be visible. | |
777 | * @param {Number} highX The rightmost pixel value that should be visible. | |
778 | * @private | |
779 | */ | |
285a6bda | 780 | Dygraph.prototype.doZoom_ = function(lowX, highX) { |
6a1aa64f DV |
781 | // Find the earliest and latest dates contained in this canvasx range. |
782 | var points = this.layout_.points; | |
783 | var minDate = null; | |
784 | var maxDate = null; | |
785 | // Find the nearest [minDate, maxDate] that contains [lowX, highX] | |
786 | for (var i = 0; i < points.length; i++) { | |
787 | var cx = points[i].canvasx; | |
788 | var x = points[i].xval; | |
789 | if (cx < lowX && (minDate == null || x > minDate)) minDate = x; | |
790 | if (cx > highX && (maxDate == null || x < maxDate)) maxDate = x; | |
791 | } | |
792 | // Use the extremes if either is missing | |
793 | if (minDate == null) minDate = points[0].xval; | |
794 | if (maxDate == null) maxDate = points[points.length-1].xval; | |
795 | ||
796 | this.dateWindow_ = [minDate, maxDate]; | |
797 | this.drawGraph_(this.rawData_); | |
285a6bda DV |
798 | if (this.attr_("zoomCallback")) { |
799 | this.attr_("zoomCallback")(minDate, maxDate); | |
67e650dc | 800 | } |
6a1aa64f DV |
801 | }; |
802 | ||
803 | /** | |
804 | * When the mouse moves in the canvas, display information about a nearby data | |
805 | * point and draw dots over those points in the data series. This function | |
806 | * takes care of cleanup of previously-drawn dots. | |
807 | * @param {Object} event The mousemove event from the browser. | |
808 | * @private | |
809 | */ | |
285a6bda | 810 | Dygraph.prototype.mouseMove_ = function(event) { |
76171648 | 811 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.hidden_); |
6a1aa64f DV |
812 | var points = this.layout_.points; |
813 | ||
814 | var lastx = -1; | |
815 | var lasty = -1; | |
816 | ||
817 | // Loop through all the points and find the date nearest to our current | |
818 | // location. | |
819 | var minDist = 1e+100; | |
820 | var idx = -1; | |
821 | for (var i = 0; i < points.length; i++) { | |
822 | var dist = Math.abs(points[i].canvasx - canvasx); | |
823 | if (dist > minDist) break; | |
824 | minDist = dist; | |
825 | idx = i; | |
826 | } | |
827 | if (idx >= 0) lastx = points[idx].xval; | |
828 | // Check that you can really highlight the last day's data | |
829 | if (canvasx > points[points.length-1].canvasx) | |
830 | lastx = points[points.length-1].xval; | |
831 | ||
832 | // Extract the points we've selected | |
b258a3da | 833 | this.selPoints_ = []; |
6a1aa64f DV |
834 | for (var i = 0; i < points.length; i++) { |
835 | if (points[i].xval == lastx) { | |
b258a3da | 836 | this.selPoints_.push(points[i]); |
6a1aa64f DV |
837 | } |
838 | } | |
839 | ||
b258a3da | 840 | if (this.attr_("highlightCallback")) { |
dd082dda DV |
841 | var px = this.lastHighlightCallbackX; |
842 | if (px !== null && lastx != px) { | |
344ba8c0 | 843 | // only fire if the selected point has changed. |
dd082dda | 844 | this.lastHighlightCallbackX = lastx; |
344ba8c0 DV |
845 | if (!this.attr_("stackedGraph")) { |
846 | this.attr_("highlightCallback")(event, lastx, this.selPoints_); | |
847 | } else { | |
71a11a8e | 848 | // "unstack" the points. |
344ba8c0 DV |
849 | var callbackPoints = this.selPoints_.map( |
850 | function(p) { return {xval: p.xval, yval: p.yval, name: p.name} }); | |
71a11a8e DV |
851 | var cumulative_sum = 0; |
852 | for (var j = callbackPoints.length - 1; j >= 0; j--) { | |
853 | callbackPoints[j].yval -= cumulative_sum; | |
854 | cumulative_sum += callbackPoints[j].yval; | |
855 | } | |
344ba8c0 | 856 | this.attr_("highlightCallback")(event, lastx, callbackPoints); |
43af96e7 | 857 | } |
dd082dda | 858 | } |
b258a3da DV |
859 | } |
860 | ||
6a1aa64f | 861 | // Clear the previously drawn vertical, if there is one |
285a6bda | 862 | var circleSize = this.attr_('highlightCircleSize'); |
6a1aa64f DV |
863 | var ctx = this.canvas_.getContext("2d"); |
864 | if (this.previousVerticalX_ >= 0) { | |
865 | var px = this.previousVerticalX_; | |
866 | ctx.clearRect(px - circleSize - 1, 0, 2 * circleSize + 2, this.height_); | |
867 | } | |
868 | ||
584ceeaa DV |
869 | var isOK = function(x) { return x && !isNaN(x); }; |
870 | ||
b258a3da DV |
871 | if (this.selPoints_.length > 0) { |
872 | var canvasx = this.selPoints_[0].canvasx; | |
6a1aa64f DV |
873 | |
874 | // Set the status message to indicate the selected point(s) | |
285a6bda | 875 | var replace = this.attr_('xValueFormatter')(lastx, this) + ":"; |
6a1aa64f | 876 | var clen = this.colors_.length; |
b258a3da DV |
877 | for (var i = 0; i < this.selPoints_.length; i++) { |
878 | if (!isOK(this.selPoints_[i].canvasy)) continue; | |
285a6bda | 879 | if (this.attr_("labelsSeparateLines")) { |
6a1aa64f DV |
880 | replace += "<br/>"; |
881 | } | |
b258a3da | 882 | var point = this.selPoints_[i]; |
f474c2a3 DV |
883 | var c = new RGBColor(this.colors_[i%clen]); |
884 | replace += " <b><font color='" + c.toHex() + "'>" | |
6a1aa64f DV |
885 | + point.name + "</font></b>:" |
886 | + this.round_(point.yval, 2); | |
887 | } | |
285a6bda | 888 | this.attr_("labelsDiv").innerHTML = replace; |
6a1aa64f DV |
889 | |
890 | // Save last x position for callbacks. | |
891 | this.lastx_ = lastx; | |
892 | ||
893 | // Draw colored circles over the center of each selected point | |
43af96e7 | 894 | ctx.save(); |
b258a3da DV |
895 | for (var i = 0; i < this.selPoints_.length; i++) { |
896 | if (!isOK(this.selPoints_[i%clen].canvasy)) continue; | |
6a1aa64f | 897 | ctx.beginPath(); |
f474c2a3 | 898 | ctx.fillStyle = this.colors_[i%clen]; |
b258a3da | 899 | ctx.arc(canvasx, this.selPoints_[i%clen].canvasy, circleSize, |
7bf6a9fe | 900 | 0, 2 * Math.PI, false); |
6a1aa64f DV |
901 | ctx.fill(); |
902 | } | |
903 | ctx.restore(); | |
904 | ||
905 | this.previousVerticalX_ = canvasx; | |
906 | } | |
907 | }; | |
908 | ||
909 | /** | |
910 | * The mouse has left the canvas. Clear out whatever artifacts remain | |
911 | * @param {Object} event the mouseout event from the browser. | |
912 | * @private | |
913 | */ | |
285a6bda | 914 | Dygraph.prototype.mouseOut_ = function(event) { |
43af96e7 NK |
915 | if (this.attr_("hideOverlayOnMouseOut")) { |
916 | // Get rid of the overlay data | |
917 | var ctx = this.canvas_.getContext("2d"); | |
918 | ctx.clearRect(0, 0, this.width_, this.height_); | |
919 | this.attr_("labelsDiv").innerHTML = ""; | |
920 | } | |
6a1aa64f DV |
921 | }; |
922 | ||
285a6bda | 923 | Dygraph.zeropad = function(x) { |
32988383 DV |
924 | if (x < 10) return "0" + x; else return "" + x; |
925 | } | |
926 | ||
6a1aa64f | 927 | /** |
6b8e33dd DV |
928 | * Return a string version of the hours, minutes and seconds portion of a date. |
929 | * @param {Number} date The JavaScript date (ms since epoch) | |
930 | * @return {String} A time of the form "HH:MM:SS" | |
931 | * @private | |
932 | */ | |
285a6bda DV |
933 | Dygraph.prototype.hmsString_ = function(date) { |
934 | var zeropad = Dygraph.zeropad; | |
6b8e33dd DV |
935 | var d = new Date(date); |
936 | if (d.getSeconds()) { | |
937 | return zeropad(d.getHours()) + ":" + | |
938 | zeropad(d.getMinutes()) + ":" + | |
939 | zeropad(d.getSeconds()); | |
6b8e33dd | 940 | } else { |
054531ca | 941 | return zeropad(d.getHours()) + ":" + zeropad(d.getMinutes()); |
6b8e33dd DV |
942 | } |
943 | } | |
944 | ||
945 | /** | |
6a1aa64f DV |
946 | * Convert a JS date (millis since epoch) to YYYY/MM/DD |
947 | * @param {Number} date The JavaScript date (ms since epoch) | |
948 | * @return {String} A date of the form "YYYY/MM/DD" | |
949 | * @private | |
285a6bda | 950 | * TODO(danvk): why is this part of the prototype? |
6a1aa64f | 951 | */ |
285a6bda DV |
952 | Dygraph.dateString_ = function(date, self) { |
953 | var zeropad = Dygraph.zeropad; | |
6a1aa64f DV |
954 | var d = new Date(date); |
955 | ||
956 | // Get the year: | |
957 | var year = "" + d.getFullYear(); | |
958 | // Get a 0 padded month string | |
6b8e33dd | 959 | var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh |
6a1aa64f | 960 | // Get a 0 padded day string |
6b8e33dd | 961 | var day = zeropad(d.getDate()); |
6a1aa64f | 962 | |
6b8e33dd DV |
963 | var ret = ""; |
964 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); | |
285a6bda | 965 | if (frac) ret = " " + self.hmsString_(date); |
6b8e33dd DV |
966 | |
967 | return year + "/" + month + "/" + day + ret; | |
6a1aa64f DV |
968 | }; |
969 | ||
970 | /** | |
971 | * Round a number to the specified number of digits past the decimal point. | |
972 | * @param {Number} num The number to round | |
973 | * @param {Number} places The number of decimals to which to round | |
974 | * @return {Number} The rounded number | |
975 | * @private | |
976 | */ | |
285a6bda | 977 | Dygraph.prototype.round_ = function(num, places) { |
6a1aa64f DV |
978 | var shift = Math.pow(10, places); |
979 | return Math.round(num * shift)/shift; | |
980 | }; | |
981 | ||
982 | /** | |
983 | * Fires when there's data available to be graphed. | |
984 | * @param {String} data Raw CSV data to be plotted | |
985 | * @private | |
986 | */ | |
285a6bda | 987 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f DV |
988 | this.rawData_ = this.parseCSV_(data); |
989 | this.drawGraph_(this.rawData_); | |
990 | }; | |
991 | ||
285a6bda | 992 | Dygraph.prototype.months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", |
8846615a | 993 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]; |
285a6bda | 994 | Dygraph.prototype.quarters = ["Jan", "Apr", "Jul", "Oct"]; |
6a1aa64f DV |
995 | |
996 | /** | |
997 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
998 | * @private | |
999 | */ | |
285a6bda | 1000 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f DV |
1001 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
1002 | var startDate, endDate; | |
1003 | if (this.dateWindow_) { | |
1004 | startDate = this.dateWindow_[0]; | |
1005 | endDate = this.dateWindow_[1]; | |
1006 | } else { | |
1007 | startDate = this.rawData_[0][0]; | |
1008 | endDate = this.rawData_[this.rawData_.length - 1][0]; | |
1009 | } | |
1010 | ||
285a6bda | 1011 | var xTicks = this.attr_('xTicker')(startDate, endDate, this); |
6a1aa64f | 1012 | this.layout_.updateOptions({xTicks: xTicks}); |
32988383 DV |
1013 | }; |
1014 | ||
1015 | // Time granularity enumeration | |
285a6bda | 1016 | Dygraph.SECONDLY = 0; |
20a41c17 DV |
1017 | Dygraph.TWO_SECONDLY = 1; |
1018 | Dygraph.FIVE_SECONDLY = 2; | |
1019 | Dygraph.TEN_SECONDLY = 3; | |
1020 | Dygraph.THIRTY_SECONDLY = 4; | |
1021 | Dygraph.MINUTELY = 5; | |
1022 | Dygraph.TWO_MINUTELY = 6; | |
1023 | Dygraph.FIVE_MINUTELY = 7; | |
1024 | Dygraph.TEN_MINUTELY = 8; | |
1025 | Dygraph.THIRTY_MINUTELY = 9; | |
1026 | Dygraph.HOURLY = 10; | |
1027 | Dygraph.TWO_HOURLY = 11; | |
1028 | Dygraph.SIX_HOURLY = 12; | |
1029 | Dygraph.DAILY = 13; | |
1030 | Dygraph.WEEKLY = 14; | |
1031 | Dygraph.MONTHLY = 15; | |
1032 | Dygraph.QUARTERLY = 16; | |
1033 | Dygraph.BIANNUAL = 17; | |
1034 | Dygraph.ANNUAL = 18; | |
1035 | Dygraph.DECADAL = 19; | |
1036 | Dygraph.NUM_GRANULARITIES = 20; | |
285a6bda DV |
1037 | |
1038 | Dygraph.SHORT_SPACINGS = []; | |
1039 | Dygraph.SHORT_SPACINGS[Dygraph.SECONDLY] = 1000 * 1; | |
20a41c17 DV |
1040 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_SECONDLY] = 1000 * 2; |
1041 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_SECONDLY] = 1000 * 5; | |
285a6bda DV |
1042 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_SECONDLY] = 1000 * 10; |
1043 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_SECONDLY] = 1000 * 30; | |
1044 | Dygraph.SHORT_SPACINGS[Dygraph.MINUTELY] = 1000 * 60; | |
20a41c17 DV |
1045 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_MINUTELY] = 1000 * 60 * 2; |
1046 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_MINUTELY] = 1000 * 60 * 5; | |
285a6bda DV |
1047 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_MINUTELY] = 1000 * 60 * 10; |
1048 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_MINUTELY] = 1000 * 60 * 30; | |
1049 | Dygraph.SHORT_SPACINGS[Dygraph.HOURLY] = 1000 * 3600; | |
20a41c17 | 1050 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_HOURLY] = 1000 * 3600 * 2; |
805d5519 | 1051 | Dygraph.SHORT_SPACINGS[Dygraph.SIX_HOURLY] = 1000 * 3600 * 6; |
285a6bda DV |
1052 | Dygraph.SHORT_SPACINGS[Dygraph.DAILY] = 1000 * 86400; |
1053 | Dygraph.SHORT_SPACINGS[Dygraph.WEEKLY] = 1000 * 604800; | |
32988383 DV |
1054 | |
1055 | // NumXTicks() | |
1056 | // | |
1057 | // If we used this time granularity, how many ticks would there be? | |
1058 | // This is only an approximation, but it's generally good enough. | |
1059 | // | |
285a6bda DV |
1060 | Dygraph.prototype.NumXTicks = function(start_time, end_time, granularity) { |
1061 | if (granularity < Dygraph.MONTHLY) { | |
32988383 | 1062 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1063 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
32988383 DV |
1064 | return Math.floor(0.5 + 1.0 * (end_time - start_time) / spacing); |
1065 | } else { | |
1066 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1067 | var num_months = 12; | |
285a6bda DV |
1068 | if (granularity == Dygraph.QUARTERLY) num_months = 3; |
1069 | if (granularity == Dygraph.BIANNUAL) num_months = 2; | |
1070 | if (granularity == Dygraph.ANNUAL) num_months = 1; | |
1071 | if (granularity == Dygraph.DECADAL) { num_months = 1; year_mod = 10; } | |
32988383 DV |
1072 | |
1073 | var msInYear = 365.2524 * 24 * 3600 * 1000; | |
1074 | var num_years = 1.0 * (end_time - start_time) / msInYear; | |
1075 | return Math.floor(0.5 + 1.0 * num_years * num_months / year_mod); | |
1076 | } | |
1077 | }; | |
1078 | ||
1079 | // GetXAxis() | |
1080 | // | |
1081 | // Construct an x-axis of nicely-formatted times on meaningful boundaries | |
1082 | // (e.g. 'Jan 09' rather than 'Jan 22, 2009'). | |
1083 | // | |
1084 | // Returns an array containing {v: millis, label: label} dictionaries. | |
1085 | // | |
285a6bda | 1086 | Dygraph.prototype.GetXAxis = function(start_time, end_time, granularity) { |
32988383 | 1087 | var ticks = []; |
285a6bda | 1088 | if (granularity < Dygraph.MONTHLY) { |
32988383 | 1089 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1090 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
3d29302c | 1091 | var format = '%d%b'; // e.g. "1Jan" |
076c9622 DV |
1092 | |
1093 | // Find a time less than start_time which occurs on a "nice" time boundary | |
1094 | // for this granularity. | |
1095 | var g = spacing / 1000; | |
076c9622 DV |
1096 | var d = new Date(start_time); |
1097 | if (g <= 60) { // seconds | |
1098 | var x = d.getSeconds(); d.setSeconds(x - x % g); | |
1099 | } else { | |
1100 | d.setSeconds(0); | |
1101 | g /= 60; | |
1102 | if (g <= 60) { // minutes | |
1103 | var x = d.getMinutes(); d.setMinutes(x - x % g); | |
1104 | } else { | |
1105 | d.setMinutes(0); | |
1106 | g /= 60; | |
1107 | ||
1108 | if (g <= 24) { // days | |
1109 | var x = d.getHours(); d.setHours(x - x % g); | |
1110 | } else { | |
1111 | d.setHours(0); | |
1112 | g /= 24; | |
1113 | ||
1114 | if (g == 7) { // one week | |
20a41c17 | 1115 | d.setDate(d.getDate() - d.getDay()); |
076c9622 DV |
1116 | } |
1117 | } | |
1118 | } | |
328bb812 | 1119 | } |
076c9622 DV |
1120 | start_time = d.getTime(); |
1121 | ||
32988383 DV |
1122 | for (var t = start_time; t <= end_time; t += spacing) { |
1123 | var d = new Date(t); | |
1124 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); | |
285a6bda | 1125 | if (frac == 0 || granularity >= Dygraph.DAILY) { |
32988383 DV |
1126 | // the extra hour covers DST problems. |
1127 | ticks.push({ v:t, label: new Date(t + 3600*1000).strftime(format) }); | |
1128 | } else { | |
1129 | ticks.push({ v:t, label: this.hmsString_(t) }); | |
1130 | } | |
1131 | } | |
1132 | } else { | |
1133 | // Display a tick mark on the first of a set of months of each year. | |
1134 | // Years get a tick mark iff y % year_mod == 0. This is useful for | |
1135 | // displaying a tick mark once every 10 years, say, on long time scales. | |
1136 | var months; | |
1137 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1138 | ||
285a6bda | 1139 | if (granularity == Dygraph.MONTHLY) { |
32988383 | 1140 | months = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ]; |
285a6bda | 1141 | } else if (granularity == Dygraph.QUARTERLY) { |
32988383 | 1142 | months = [ 0, 3, 6, 9 ]; |
285a6bda | 1143 | } else if (granularity == Dygraph.BIANNUAL) { |
32988383 | 1144 | months = [ 0, 6 ]; |
285a6bda | 1145 | } else if (granularity == Dygraph.ANNUAL) { |
32988383 | 1146 | months = [ 0 ]; |
285a6bda | 1147 | } else if (granularity == Dygraph.DECADAL) { |
32988383 DV |
1148 | months = [ 0 ]; |
1149 | year_mod = 10; | |
1150 | } | |
1151 | ||
1152 | var start_year = new Date(start_time).getFullYear(); | |
1153 | var end_year = new Date(end_time).getFullYear(); | |
285a6bda | 1154 | var zeropad = Dygraph.zeropad; |
32988383 DV |
1155 | for (var i = start_year; i <= end_year; i++) { |
1156 | if (i % year_mod != 0) continue; | |
1157 | for (var j = 0; j < months.length; j++) { | |
1158 | var date_str = i + "/" + zeropad(1 + months[j]) + "/01"; | |
1159 | var t = Date.parse(date_str); | |
1160 | if (t < start_time || t > end_time) continue; | |
1161 | ticks.push({ v:t, label: new Date(t).strftime('%b %y') }); | |
1162 | } | |
1163 | } | |
1164 | } | |
1165 | ||
1166 | return ticks; | |
1167 | }; | |
1168 | ||
6a1aa64f DV |
1169 | |
1170 | /** | |
1171 | * Add ticks to the x-axis based on a date range. | |
1172 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1173 | * @param {Number} endDate End of the date window (millis since epoch) | |
1174 | * @return {Array.<Object>} Array of {label, value} tuples. | |
1175 | * @public | |
1176 | */ | |
285a6bda | 1177 | Dygraph.dateTicker = function(startDate, endDate, self) { |
32988383 | 1178 | var chosen = -1; |
285a6bda DV |
1179 | for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) { |
1180 | var num_ticks = self.NumXTicks(startDate, endDate, i); | |
1181 | if (self.width_ / num_ticks >= self.attr_('pixelsPerXLabel')) { | |
32988383 DV |
1182 | chosen = i; |
1183 | break; | |
2769de62 | 1184 | } |
6a1aa64f DV |
1185 | } |
1186 | ||
32988383 | 1187 | if (chosen >= 0) { |
285a6bda | 1188 | return self.GetXAxis(startDate, endDate, chosen); |
6a1aa64f | 1189 | } else { |
32988383 | 1190 | // TODO(danvk): signal error. |
6a1aa64f | 1191 | } |
6a1aa64f DV |
1192 | }; |
1193 | ||
1194 | /** | |
1195 | * Add ticks when the x axis has numbers on it (instead of dates) | |
1196 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1197 | * @param {Number} endDate End of the date window (millis since epoch) | |
1198 | * @return {Array.<Object>} Array of {label, value} tuples. | |
1199 | * @public | |
1200 | */ | |
285a6bda | 1201 | Dygraph.numericTicks = function(minV, maxV, self) { |
c6336f04 DV |
1202 | // Basic idea: |
1203 | // Try labels every 1, 2, 5, 10, 20, 50, 100, etc. | |
1204 | // Calculate the resulting tick spacing (i.e. this.height_ / nTicks). | |
285a6bda | 1205 | // The first spacing greater than pixelsPerYLabel is what we use. |
ff00d3e2 | 1206 | // TODO(danvk): version that works on a log scale. |
f09e46d4 DV |
1207 | if (self.attr_("labelsKMG2")) { |
1208 | var mults = [1, 2, 4, 8]; | |
1209 | } else { | |
1210 | var mults = [1, 2, 5]; | |
1211 | } | |
c6336f04 | 1212 | var scale, low_val, high_val, nTicks; |
285a6bda DV |
1213 | // TODO(danvk): make it possible to set this for x- and y-axes independently. |
1214 | var pixelsPerTick = self.attr_('pixelsPerYLabel'); | |
c6336f04 | 1215 | for (var i = -10; i < 50; i++) { |
f09e46d4 DV |
1216 | if (self.attr_("labelsKMG2")) { |
1217 | var base_scale = Math.pow(16, i); | |
1218 | } else { | |
1219 | var base_scale = Math.pow(10, i); | |
1220 | } | |
c6336f04 DV |
1221 | for (var j = 0; j < mults.length; j++) { |
1222 | scale = base_scale * mults[j]; | |
c6336f04 DV |
1223 | low_val = Math.floor(minV / scale) * scale; |
1224 | high_val = Math.ceil(maxV / scale) * scale; | |
1225 | nTicks = (high_val - low_val) / scale; | |
285a6bda | 1226 | var spacing = self.height_ / nTicks; |
c6336f04 | 1227 | // wish I could break out of both loops at once... |
285a6bda | 1228 | if (spacing > pixelsPerTick) break; |
c6336f04 | 1229 | } |
285a6bda | 1230 | if (spacing > pixelsPerTick) break; |
6a1aa64f DV |
1231 | } |
1232 | ||
1233 | // Construct labels for the ticks | |
1234 | var ticks = []; | |
ed11be50 DV |
1235 | var k; |
1236 | var k_labels = []; | |
1237 | if (self.attr_("labelsKMB")) { | |
1238 | k = 1000; | |
1239 | k_labels = [ "K", "M", "B", "T" ]; | |
1240 | } | |
1241 | if (self.attr_("labelsKMG2")) { | |
1242 | if (k) self.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); | |
1243 | k = 1024; | |
1244 | k_labels = [ "k", "M", "G", "T" ]; | |
1245 | } | |
1246 | ||
c6336f04 DV |
1247 | for (var i = 0; i < nTicks; i++) { |
1248 | var tickV = low_val + i * scale; | |
0af6e346 | 1249 | var absTickV = Math.abs(tickV); |
285a6bda | 1250 | var label = self.round_(tickV, 2); |
ed11be50 DV |
1251 | if (k_labels.length) { |
1252 | // Round up to an appropriate unit. | |
1253 | var n = k*k*k*k; | |
1254 | for (var j = 3; j >= 0; j--, n /= k) { | |
1255 | if (absTickV >= n) { | |
1256 | label = self.round_(tickV / n, 1) + k_labels[j]; | |
1257 | break; | |
1258 | } | |
afefbcdb | 1259 | } |
6a1aa64f DV |
1260 | } |
1261 | ticks.push( {label: label, v: tickV} ); | |
1262 | } | |
1263 | return ticks; | |
1264 | }; | |
1265 | ||
1266 | /** | |
1267 | * Adds appropriate ticks on the y-axis | |
1268 | * @param {Number} minY The minimum Y value in the data set | |
1269 | * @param {Number} maxY The maximum Y value in the data set | |
1270 | * @private | |
1271 | */ | |
285a6bda | 1272 | Dygraph.prototype.addYTicks_ = function(minY, maxY) { |
6a1aa64f | 1273 | // Set the number of ticks so that the labels are human-friendly. |
285a6bda DV |
1274 | // TODO(danvk): make this an attribute as well. |
1275 | var ticks = Dygraph.numericTicks(minY, maxY, this); | |
6a1aa64f DV |
1276 | this.layout_.updateOptions( { yAxis: [minY, maxY], |
1277 | yTicks: ticks } ); | |
1278 | }; | |
1279 | ||
5011e7a1 DV |
1280 | // Computes the range of the data series (including confidence intervals). |
1281 | // series is either [ [x1, y1], [x2, y2], ... ] or | |
1282 | // [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... | |
1283 | // Returns [low, high] | |
1284 | Dygraph.prototype.extremeValues_ = function(series) { | |
1285 | var minY = null, maxY = null; | |
1286 | ||
9922b78b | 1287 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
5011e7a1 DV |
1288 | if (bars) { |
1289 | // With custom bars, maxY is the max of the high values. | |
1290 | for (var j = 0; j < series.length; j++) { | |
1291 | var y = series[j][1][0]; | |
1292 | if (!y) continue; | |
1293 | var low = y - series[j][1][1]; | |
1294 | var high = y + series[j][1][2]; | |
1295 | if (low > y) low = y; // this can happen with custom bars, | |
1296 | if (high < y) high = y; // e.g. in tests/custom-bars.html | |
1297 | if (maxY == null || high > maxY) { | |
1298 | maxY = high; | |
1299 | } | |
1300 | if (minY == null || low < minY) { | |
1301 | minY = low; | |
1302 | } | |
1303 | } | |
1304 | } else { | |
1305 | for (var j = 0; j < series.length; j++) { | |
1306 | var y = series[j][1]; | |
d12999d3 | 1307 | if (y === null || isNaN(y)) continue; |
5011e7a1 DV |
1308 | if (maxY == null || y > maxY) { |
1309 | maxY = y; | |
1310 | } | |
1311 | if (minY == null || y < minY) { | |
1312 | minY = y; | |
1313 | } | |
1314 | } | |
1315 | } | |
1316 | ||
1317 | return [minY, maxY]; | |
1318 | }; | |
1319 | ||
6a1aa64f DV |
1320 | /** |
1321 | * Update the graph with new data. Data is in the format | |
1322 | * [ [date1, val1, val2, ...], [date2, val1, val2, ...] if errorBars=false | |
1323 | * or, if errorBars=true, | |
1324 | * [ [date1, [val1,stddev1], [val2,stddev2], ...], [date2, ...], ...] | |
1325 | * @param {Array.<Object>} data The data (see above) | |
1326 | * @private | |
1327 | */ | |
285a6bda | 1328 | Dygraph.prototype.drawGraph_ = function(data) { |
fe0b7c03 DV |
1329 | // This is used to set the second parameter to drawCallback, below. |
1330 | var is_initial_draw = this.is_initial_draw_; | |
1331 | this.is_initial_draw_ = false; | |
1332 | ||
3bd9c228 | 1333 | var minY = null, maxY = null; |
6a1aa64f | 1334 | this.layout_.removeAllDatasets(); |
285a6bda | 1335 | this.setColors_(); |
9317362d | 1336 | this.attrs_['pointSize'] = 0.5 * this.attr_('highlightCircleSize'); |
285a6bda | 1337 | |
43af96e7 NK |
1338 | // For stacked series. |
1339 | var cumulative_y = []; | |
344ba8c0 | 1340 | var stacked_datasets = []; |
43af96e7 | 1341 | |
6a1aa64f | 1342 | // Loop over all fields in the dataset |
43af96e7 | 1343 | |
6a1aa64f | 1344 | for (var i = 1; i < data[0].length; i++) { |
1cf11047 DV |
1345 | if (!this.visibility()[i - 1]) continue; |
1346 | ||
6a1aa64f DV |
1347 | var series = []; |
1348 | for (var j = 0; j < data.length; j++) { | |
1349 | var date = data[j][0]; | |
1350 | series[j] = [date, data[j][i]]; | |
1351 | } | |
1352 | series = this.rollingAverage(series, this.rollPeriod_); | |
1353 | ||
1354 | // Prune down to the desired range, if necessary (for zooming) | |
9922b78b | 1355 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
6a1aa64f DV |
1356 | if (this.dateWindow_) { |
1357 | var low = this.dateWindow_[0]; | |
1358 | var high= this.dateWindow_[1]; | |
1359 | var pruned = []; | |
1360 | for (var k = 0; k < series.length; k++) { | |
1361 | if (series[k][0] >= low && series[k][0] <= high) { | |
1362 | pruned.push(series[k]); | |
6a1aa64f DV |
1363 | } |
1364 | } | |
1365 | series = pruned; | |
6a1aa64f DV |
1366 | } |
1367 | ||
648acd28 DV |
1368 | var extremes = this.extremeValues_(series); |
1369 | var thisMinY = extremes[0]; | |
1370 | var thisMaxY = extremes[1]; | |
5011e7a1 DV |
1371 | if (!minY || thisMinY < minY) minY = thisMinY; |
1372 | if (!maxY || thisMaxY > maxY) maxY = thisMaxY; | |
1373 | ||
6a1aa64f DV |
1374 | if (bars) { |
1375 | var vals = []; | |
1376 | for (var j=0; j<series.length; j++) | |
1377 | vals[j] = [series[j][0], | |
1378 | series[j][1][0], series[j][1][1], series[j][1][2]]; | |
285a6bda | 1379 | this.layout_.addDataset(this.attr_("labels")[i], vals); |
43af96e7 NK |
1380 | } else if (this.attr_("stackedGraph")) { |
1381 | var vals = []; | |
1382 | var l = series.length; | |
1383 | var actual_y; | |
1384 | for (var j = 0; j < l; j++) { | |
1385 | if (cumulative_y[series[j][0]] === undefined) | |
1386 | cumulative_y[series[j][0]] = 0; | |
1387 | ||
1388 | actual_y = series[j][1]; | |
1389 | cumulative_y[series[j][0]] += actual_y; | |
1390 | ||
1391 | vals[j] = [series[j][0], cumulative_y[series[j][0]]] | |
1392 | ||
1393 | if (!maxY || cumulative_y[series[j][0]] > maxY) | |
1394 | maxY = cumulative_y[series[j][0]]; | |
1395 | } | |
344ba8c0 | 1396 | stacked_datasets.push([this.attr_("labels")[i], vals]); |
43af96e7 | 1397 | //this.layout_.addDataset(this.attr_("labels")[i], vals); |
6a1aa64f | 1398 | } else { |
285a6bda | 1399 | this.layout_.addDataset(this.attr_("labels")[i], series); |
6a1aa64f DV |
1400 | } |
1401 | } | |
1402 | ||
344ba8c0 DV |
1403 | if (stacked_datasets.length > 0) { |
1404 | for (var i = (stacked_datasets.length - 1); i >= 0; i--) { | |
1405 | this.layout_.addDataset(stacked_datasets[i][0], stacked_datasets[i][1]); | |
43af96e7 NK |
1406 | } |
1407 | } | |
1408 | ||
6a1aa64f DV |
1409 | // Use some heuristics to come up with a good maxY value, unless it's been |
1410 | // set explicitly by the user. | |
1411 | if (this.valueRange_ != null) { | |
1412 | this.addYTicks_(this.valueRange_[0], this.valueRange_[1]); | |
1413 | } else { | |
d053ab5a DV |
1414 | // This affects the calculation of span, below. |
1415 | if (this.attr_("includeZero") && minY > 0) { | |
1416 | minY = 0; | |
1417 | } | |
1418 | ||
6a1aa64f | 1419 | // Add some padding and round up to an integer to be human-friendly. |
3bd9c228 | 1420 | var span = maxY - minY; |
93dfacfd DV |
1421 | // special case: if we have no sense of scale, use +/-10% of the sole value. |
1422 | if (span == 0) { span = maxY; } | |
3bd9c228 DV |
1423 | var maxAxisY = maxY + 0.1 * span; |
1424 | var minAxisY = minY - 0.1 * span; | |
1425 | ||
1426 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. | |
ceb009dd DV |
1427 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; |
1428 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
3bd9c228 DV |
1429 | |
1430 | if (this.attr_("includeZero")) { | |
1431 | if (maxY < 0) maxAxisY = 0; | |
1432 | if (minY > 0) minAxisY = 0; | |
1433 | } | |
1434 | ||
1435 | this.addYTicks_(minAxisY, maxAxisY); | |
6a1aa64f DV |
1436 | } |
1437 | ||
1438 | this.addXTicks_(); | |
1439 | ||
1440 | // Tell PlotKit to use this new data and render itself | |
d033ae1c | 1441 | this.layout_.updateOptions({dateWindow: this.dateWindow_}); |
6a1aa64f DV |
1442 | this.layout_.evaluateWithError(); |
1443 | this.plotter_.clear(); | |
1444 | this.plotter_.render(); | |
f6401bf6 DV |
1445 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
1446 | this.canvas_.height); | |
599fb4ad DV |
1447 | |
1448 | if (this.attr_("drawCallback") !== null) { | |
fe0b7c03 | 1449 | this.attr_("drawCallback")(this, is_initial_draw); |
599fb4ad | 1450 | } |
6a1aa64f DV |
1451 | }; |
1452 | ||
1453 | /** | |
1454 | * Calculates the rolling average of a data set. | |
1455 | * If originalData is [label, val], rolls the average of those. | |
1456 | * If originalData is [label, [, it's interpreted as [value, stddev] | |
1457 | * and the roll is returned in the same form, with appropriately reduced | |
1458 | * stddev for each value. | |
1459 | * Note that this is where fractional input (i.e. '5/10') is converted into | |
1460 | * decimal values. | |
1461 | * @param {Array} originalData The data in the appropriate format (see above) | |
1462 | * @param {Number} rollPeriod The number of days over which to average the data | |
1463 | */ | |
285a6bda | 1464 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
6a1aa64f DV |
1465 | if (originalData.length < 2) |
1466 | return originalData; | |
1467 | var rollPeriod = Math.min(rollPeriod, originalData.length - 1); | |
1468 | var rollingData = []; | |
285a6bda | 1469 | var sigma = this.attr_("sigma"); |
6a1aa64f DV |
1470 | |
1471 | if (this.fractions_) { | |
1472 | var num = 0; | |
1473 | var den = 0; // numerator/denominator | |
1474 | var mult = 100.0; | |
1475 | for (var i = 0; i < originalData.length; i++) { | |
1476 | num += originalData[i][1][0]; | |
1477 | den += originalData[i][1][1]; | |
1478 | if (i - rollPeriod >= 0) { | |
1479 | num -= originalData[i - rollPeriod][1][0]; | |
1480 | den -= originalData[i - rollPeriod][1][1]; | |
1481 | } | |
1482 | ||
1483 | var date = originalData[i][0]; | |
1484 | var value = den ? num / den : 0.0; | |
285a6bda | 1485 | if (this.attr_("errorBars")) { |
6a1aa64f DV |
1486 | if (this.wilsonInterval_) { |
1487 | // For more details on this confidence interval, see: | |
1488 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval | |
1489 | if (den) { | |
1490 | var p = value < 0 ? 0 : value, n = den; | |
1491 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); | |
1492 | var denom = 1 + sigma * sigma / den; | |
1493 | var low = (p + sigma * sigma / (2 * den) - pm) / denom; | |
1494 | var high = (p + sigma * sigma / (2 * den) + pm) / denom; | |
1495 | rollingData[i] = [date, | |
1496 | [p * mult, (p - low) * mult, (high - p) * mult]]; | |
1497 | } else { | |
1498 | rollingData[i] = [date, [0, 0, 0]]; | |
1499 | } | |
1500 | } else { | |
1501 | var stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; | |
1502 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; | |
1503 | } | |
1504 | } else { | |
1505 | rollingData[i] = [date, mult * value]; | |
1506 | } | |
1507 | } | |
9922b78b | 1508 | } else if (this.attr_("customBars")) { |
f6885d6a DV |
1509 | var low = 0; |
1510 | var mid = 0; | |
1511 | var high = 0; | |
1512 | var count = 0; | |
6a1aa64f DV |
1513 | for (var i = 0; i < originalData.length; i++) { |
1514 | var data = originalData[i][1]; | |
1515 | var y = data[1]; | |
1516 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; | |
f6885d6a | 1517 | |
8b91c51f | 1518 | if (y != null && !isNaN(y)) { |
49a7d0d5 DV |
1519 | low += data[0]; |
1520 | mid += y; | |
1521 | high += data[2]; | |
1522 | count += 1; | |
1523 | } | |
f6885d6a DV |
1524 | if (i - rollPeriod >= 0) { |
1525 | var prev = originalData[i - rollPeriod]; | |
8b91c51f | 1526 | if (prev[1][1] != null && !isNaN(prev[1][1])) { |
49a7d0d5 DV |
1527 | low -= prev[1][0]; |
1528 | mid -= prev[1][1]; | |
1529 | high -= prev[1][2]; | |
1530 | count -= 1; | |
1531 | } | |
f6885d6a DV |
1532 | } |
1533 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, | |
1534 | 1.0 * (mid - low) / count, | |
1535 | 1.0 * (high - mid) / count ]]; | |
2769de62 | 1536 | } |
6a1aa64f DV |
1537 | } else { |
1538 | // Calculate the rolling average for the first rollPeriod - 1 points where | |
1539 | // there is not enough data to roll over the full number of days | |
1540 | var num_init_points = Math.min(rollPeriod - 1, originalData.length - 2); | |
285a6bda | 1541 | if (!this.attr_("errorBars")){ |
5011e7a1 DV |
1542 | if (rollPeriod == 1) { |
1543 | return originalData; | |
1544 | } | |
1545 | ||
2847c1cf | 1546 | for (var i = 0; i < originalData.length; i++) { |
6a1aa64f | 1547 | var sum = 0; |
5011e7a1 | 1548 | var num_ok = 0; |
2847c1cf DV |
1549 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
1550 | var y = originalData[j][1]; | |
8b91c51f | 1551 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 1552 | num_ok++; |
2847c1cf | 1553 | sum += originalData[j][1]; |
6a1aa64f | 1554 | } |
5011e7a1 | 1555 | if (num_ok) { |
2847c1cf | 1556 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
5011e7a1 | 1557 | } else { |
2847c1cf | 1558 | rollingData[i] = [originalData[i][0], null]; |
5011e7a1 | 1559 | } |
6a1aa64f | 1560 | } |
2847c1cf DV |
1561 | |
1562 | } else { | |
1563 | for (var i = 0; i < originalData.length; i++) { | |
6a1aa64f DV |
1564 | var sum = 0; |
1565 | var variance = 0; | |
5011e7a1 | 1566 | var num_ok = 0; |
2847c1cf | 1567 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
5011e7a1 | 1568 | var y = originalData[j][1][0]; |
8b91c51f | 1569 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 1570 | num_ok++; |
6a1aa64f DV |
1571 | sum += originalData[j][1][0]; |
1572 | variance += Math.pow(originalData[j][1][1], 2); | |
1573 | } | |
5011e7a1 DV |
1574 | if (num_ok) { |
1575 | var stddev = Math.sqrt(variance) / num_ok; | |
1576 | rollingData[i] = [originalData[i][0], | |
1577 | [sum / num_ok, sigma * stddev, sigma * stddev]]; | |
1578 | } else { | |
1579 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
1580 | } | |
6a1aa64f DV |
1581 | } |
1582 | } | |
1583 | } | |
1584 | ||
1585 | return rollingData; | |
1586 | }; | |
1587 | ||
1588 | /** | |
1589 | * Parses a date, returning the number of milliseconds since epoch. This can be | |
285a6bda DV |
1590 | * passed in as an xValueParser in the Dygraph constructor. |
1591 | * TODO(danvk): enumerate formats that this understands. | |
6a1aa64f DV |
1592 | * @param {String} A date in YYYYMMDD format. |
1593 | * @return {Number} Milliseconds since epoch. | |
1594 | * @public | |
1595 | */ | |
285a6bda | 1596 | Dygraph.dateParser = function(dateStr, self) { |
6a1aa64f | 1597 | var dateStrSlashed; |
285a6bda | 1598 | var d; |
986a5026 | 1599 | if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12' |
6a1aa64f | 1600 | dateStrSlashed = dateStr.replace("-", "/", "g"); |
353a0294 DV |
1601 | while (dateStrSlashed.search("-") != -1) { |
1602 | dateStrSlashed = dateStrSlashed.replace("-", "/"); | |
1603 | } | |
285a6bda | 1604 | d = Date.parse(dateStrSlashed); |
2769de62 | 1605 | } else if (dateStr.length == 8) { // e.g. '20090712' |
285a6bda | 1606 | // TODO(danvk): remove support for this format. It's confusing. |
6a1aa64f DV |
1607 | dateStrSlashed = dateStr.substr(0,4) + "/" + dateStr.substr(4,2) |
1608 | + "/" + dateStr.substr(6,2); | |
285a6bda | 1609 | d = Date.parse(dateStrSlashed); |
2769de62 DV |
1610 | } else { |
1611 | // Any format that Date.parse will accept, e.g. "2009/07/12" or | |
1612 | // "2009/07/12 12:34:56" | |
285a6bda DV |
1613 | d = Date.parse(dateStr); |
1614 | } | |
1615 | ||
1616 | if (!d || isNaN(d)) { | |
1617 | self.error("Couldn't parse " + dateStr + " as a date"); | |
1618 | } | |
1619 | return d; | |
1620 | }; | |
1621 | ||
1622 | /** | |
1623 | * Detects the type of the str (date or numeric) and sets the various | |
1624 | * formatting attributes in this.attrs_ based on this type. | |
1625 | * @param {String} str An x value. | |
1626 | * @private | |
1627 | */ | |
1628 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
1629 | var isDate = false; | |
1630 | if (str.indexOf('-') >= 0 || | |
1631 | str.indexOf('/') >= 0 || | |
1632 | isNaN(parseFloat(str))) { | |
1633 | isDate = true; | |
1634 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
1635 | // TODO(danvk): remove support for this format. | |
1636 | isDate = true; | |
1637 | } | |
1638 | ||
1639 | if (isDate) { | |
1640 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
1641 | this.attrs_.xValueParser = Dygraph.dateParser; | |
1642 | this.attrs_.xTicker = Dygraph.dateTicker; | |
1643 | } else { | |
1644 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
1645 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
1646 | this.attrs_.xTicker = Dygraph.numericTicks; | |
6a1aa64f | 1647 | } |
6a1aa64f DV |
1648 | }; |
1649 | ||
1650 | /** | |
1651 | * Parses a string in a special csv format. We expect a csv file where each | |
1652 | * line is a date point, and the first field in each line is the date string. | |
1653 | * We also expect that all remaining fields represent series. | |
285a6bda | 1654 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f DV |
1655 | * date, series1, stddev1, series2, stddev2, ... |
1656 | * @param {Array.<Object>} data See above. | |
1657 | * @private | |
285a6bda DV |
1658 | * |
1659 | * @return Array.<Object> An array with one entry for each row. These entries | |
1660 | * are an array of cells in that row. The first entry is the parsed x-value for | |
1661 | * the row. The second, third, etc. are the y-values. These can take on one of | |
1662 | * three forms, depending on the CSV and constructor parameters: | |
1663 | * 1. numeric value | |
1664 | * 2. [ value, stddev ] | |
1665 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 1666 | */ |
285a6bda | 1667 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f DV |
1668 | var ret = []; |
1669 | var lines = data.split("\n"); | |
3d67f03b DV |
1670 | |
1671 | // Use the default delimiter or fall back to a tab if that makes sense. | |
1672 | var delim = this.attr_('delimiter'); | |
1673 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { | |
1674 | delim = '\t'; | |
1675 | } | |
1676 | ||
285a6bda | 1677 | var start = 0; |
6a1aa64f | 1678 | if (this.labelsFromCSV_) { |
285a6bda | 1679 | start = 1; |
3d67f03b | 1680 | this.attrs_.labels = lines[0].split(delim); |
6a1aa64f DV |
1681 | } |
1682 | ||
285a6bda DV |
1683 | var xParser; |
1684 | var defaultParserSet = false; // attempt to auto-detect x value type | |
1685 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 1686 | var outOfOrder = false; |
6a1aa64f DV |
1687 | for (var i = start; i < lines.length; i++) { |
1688 | var line = lines[i]; | |
1689 | if (line.length == 0) continue; // skip blank lines | |
3d67f03b DV |
1690 | if (line[0] == '#') continue; // skip comment lines |
1691 | var inFields = line.split(delim); | |
285a6bda | 1692 | if (inFields.length < 2) continue; |
6a1aa64f DV |
1693 | |
1694 | var fields = []; | |
285a6bda DV |
1695 | if (!defaultParserSet) { |
1696 | this.detectTypeFromString_(inFields[0]); | |
1697 | xParser = this.attr_("xValueParser"); | |
1698 | defaultParserSet = true; | |
1699 | } | |
1700 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
1701 | |
1702 | // If fractions are expected, parse the numbers as "A/B" | |
1703 | if (this.fractions_) { | |
1704 | for (var j = 1; j < inFields.length; j++) { | |
1705 | // TODO(danvk): figure out an appropriate way to flag parse errors. | |
1706 | var vals = inFields[j].split("/"); | |
1707 | fields[j] = [parseFloat(vals[0]), parseFloat(vals[1])]; | |
1708 | } | |
285a6bda | 1709 | } else if (this.attr_("errorBars")) { |
6a1aa64f DV |
1710 | // If there are error bars, values are (value, stddev) pairs |
1711 | for (var j = 1; j < inFields.length; j += 2) | |
1712 | fields[(j + 1) / 2] = [parseFloat(inFields[j]), | |
1713 | parseFloat(inFields[j + 1])]; | |
9922b78b | 1714 | } else if (this.attr_("customBars")) { |
6a1aa64f DV |
1715 | // Bars are a low;center;high tuple |
1716 | for (var j = 1; j < inFields.length; j++) { | |
1717 | var vals = inFields[j].split(";"); | |
1718 | fields[j] = [ parseFloat(vals[0]), | |
1719 | parseFloat(vals[1]), | |
1720 | parseFloat(vals[2]) ]; | |
1721 | } | |
1722 | } else { | |
1723 | // Values are just numbers | |
285a6bda | 1724 | for (var j = 1; j < inFields.length; j++) { |
6a1aa64f | 1725 | fields[j] = parseFloat(inFields[j]); |
285a6bda | 1726 | } |
6a1aa64f | 1727 | } |
987840a2 DV |
1728 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
1729 | outOfOrder = true; | |
1730 | } | |
6a1aa64f | 1731 | ret.push(fields); |
285a6bda DV |
1732 | |
1733 | if (fields.length != expectedCols) { | |
1734 | this.error("Number of columns in line " + i + " (" + fields.length + | |
1735 | ") does not agree with number of labels (" + expectedCols + | |
1736 | ") " + line); | |
1737 | } | |
6a1aa64f | 1738 | } |
987840a2 DV |
1739 | |
1740 | if (outOfOrder) { | |
1741 | this.warn("CSV is out of order; order it correctly to speed loading."); | |
1742 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
1743 | } | |
1744 | ||
6a1aa64f DV |
1745 | return ret; |
1746 | }; | |
1747 | ||
1748 | /** | |
285a6bda DV |
1749 | * The user has provided their data as a pre-packaged JS array. If the x values |
1750 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
1751 | * are dates, we need to convert them from Date objects to ms since epoch. | |
1752 | * @param {Array.<Object>} data | |
1753 | * @return {Array.<Object>} data with numeric x values. | |
1754 | */ | |
1755 | Dygraph.prototype.parseArray_ = function(data) { | |
1756 | // Peek at the first x value to see if it's numeric. | |
1757 | if (data.length == 0) { | |
1758 | this.error("Can't plot empty data set"); | |
1759 | return null; | |
1760 | } | |
1761 | if (data[0].length == 0) { | |
1762 | this.error("Data set cannot contain an empty row"); | |
1763 | return null; | |
1764 | } | |
1765 | ||
1766 | if (this.attr_("labels") == null) { | |
1767 | this.warn("Using default labels. Set labels explicitly via 'labels' " + | |
1768 | "in the options parameter"); | |
1769 | this.attrs_.labels = [ "X" ]; | |
1770 | for (var i = 1; i < data[0].length; i++) { | |
1771 | this.attrs_.labels.push("Y" + i); | |
1772 | } | |
1773 | } | |
1774 | ||
2dda3850 | 1775 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda DV |
1776 | // Some intelligent defaults for a date x-axis. |
1777 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
1778 | this.attrs_.xTicker = Dygraph.dateTicker; | |
1779 | ||
1780 | // Assume they're all dates. | |
e3ab7b40 | 1781 | var parsedData = Dygraph.clone(data); |
285a6bda DV |
1782 | for (var i = 0; i < data.length; i++) { |
1783 | if (parsedData[i].length == 0) { | |
1784 | this.error("Row " << (1 + i) << " of data is empty"); | |
1785 | return null; | |
1786 | } | |
1787 | if (parsedData[i][0] == null | |
1788 | || typeof(parsedData[i][0].getTime) != 'function') { | |
1789 | this.error("x value in row " << (1 + i) << " is not a Date"); | |
1790 | return null; | |
1791 | } | |
1792 | parsedData[i][0] = parsedData[i][0].getTime(); | |
1793 | } | |
1794 | return parsedData; | |
1795 | } else { | |
1796 | // Some intelligent defaults for a numeric x-axis. | |
1797 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
1798 | this.attrs_.xTicker = Dygraph.numericTicks; | |
1799 | return data; | |
1800 | } | |
1801 | }; | |
1802 | ||
1803 | /** | |
79420a1e DV |
1804 | * Parses a DataTable object from gviz. |
1805 | * The data is expected to have a first column that is either a date or a | |
1806 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
1807 | * between this.xValueParser_ and the type of the first column, it will be | |
1808 | * fixed. Returned value is in the same format as return value of parseCSV_. | |
1809 | * @param {Array.<Object>} data See above. | |
1810 | * @private | |
1811 | */ | |
285a6bda | 1812 | Dygraph.prototype.parseDataTable_ = function(data) { |
79420a1e DV |
1813 | var cols = data.getNumberOfColumns(); |
1814 | var rows = data.getNumberOfRows(); | |
1815 | ||
1816 | // Read column labels | |
1817 | var labels = []; | |
1818 | for (var i = 0; i < cols; i++) { | |
1819 | labels.push(data.getColumnLabel(i)); | |
3e3f84e4 | 1820 | if (i != 0 && this.attr_("errorBars")) i += 1; |
79420a1e | 1821 | } |
285a6bda | 1822 | this.attrs_.labels = labels; |
3e3f84e4 | 1823 | cols = labels.length; |
79420a1e | 1824 | |
d955e223 | 1825 | var indepType = data.getColumnType(0); |
4440f6c8 | 1826 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda DV |
1827 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
1828 | this.attrs_.xValueParser = Dygraph.dateParser; | |
1829 | this.attrs_.xTicker = Dygraph.dateTicker; | |
33127159 | 1830 | } else if (indepType == 'number') { |
285a6bda DV |
1831 | this.attrs_.xValueFormatter = function(x) { return x; }; |
1832 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
1833 | this.attrs_.xTicker = Dygraph.numericTicks; | |
1834 | } else { | |
987840a2 DV |
1835 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
1836 | "column 1 of DataTable input (Got '" + indepType + "')"); | |
79420a1e DV |
1837 | return null; |
1838 | } | |
1839 | ||
1840 | var ret = []; | |
987840a2 | 1841 | var outOfOrder = false; |
79420a1e DV |
1842 | for (var i = 0; i < rows; i++) { |
1843 | var row = []; | |
debe4434 DV |
1844 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
1845 | data.getValue(i, 0) === null) { | |
1846 | this.warning("Ignoring row " + i + | |
1847 | " of DataTable because of undefined or null first column."); | |
1848 | continue; | |
1849 | } | |
1850 | ||
c21d2c2d | 1851 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
1852 | row.push(data.getValue(i, 0).getTime()); |
1853 | } else { | |
1854 | row.push(data.getValue(i, 0)); | |
1855 | } | |
3e3f84e4 DV |
1856 | if (!this.attr_("errorBars")) { |
1857 | for (var j = 1; j < cols; j++) { | |
1858 | row.push(data.getValue(i, j)); | |
1859 | } | |
1860 | } else { | |
1861 | for (var j = 0; j < cols - 1; j++) { | |
1862 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); | |
1863 | } | |
79420a1e | 1864 | } |
987840a2 DV |
1865 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
1866 | outOfOrder = true; | |
1867 | } | |
243d96e8 | 1868 | ret.push(row); |
79420a1e | 1869 | } |
987840a2 DV |
1870 | |
1871 | if (outOfOrder) { | |
1872 | this.warn("DataTable is out of order; order it correctly to speed loading."); | |
1873 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
1874 | } | |
79420a1e DV |
1875 | return ret; |
1876 | } | |
1877 | ||
24e5350c | 1878 | // These functions are all based on MochiKit. |
fc80a396 DV |
1879 | Dygraph.update = function (self, o) { |
1880 | if (typeof(o) != 'undefined' && o !== null) { | |
1881 | for (var k in o) { | |
85b99f0b DV |
1882 | if (o.hasOwnProperty(k)) { |
1883 | self[k] = o[k]; | |
1884 | } | |
fc80a396 DV |
1885 | } |
1886 | } | |
1887 | return self; | |
1888 | }; | |
1889 | ||
2dda3850 DV |
1890 | Dygraph.isArrayLike = function (o) { |
1891 | var typ = typeof(o); | |
1892 | if ( | |
c21d2c2d | 1893 | (typ != 'object' && !(typ == 'function' && |
2dda3850 DV |
1894 | typeof(o.item) == 'function')) || |
1895 | o === null || | |
1896 | typeof(o.length) != 'number' || | |
1897 | o.nodeType === 3 | |
1898 | ) { | |
1899 | return false; | |
1900 | } | |
1901 | return true; | |
1902 | }; | |
1903 | ||
1904 | Dygraph.isDateLike = function (o) { | |
1905 | if (typeof(o) != "object" || o === null || | |
1906 | typeof(o.getTime) != 'function') { | |
1907 | return false; | |
1908 | } | |
1909 | return true; | |
1910 | }; | |
1911 | ||
e3ab7b40 DV |
1912 | Dygraph.clone = function(o) { |
1913 | // TODO(danvk): figure out how MochiKit's version works | |
1914 | var r = []; | |
1915 | for (var i = 0; i < o.length; i++) { | |
1916 | if (Dygraph.isArrayLike(o[i])) { | |
1917 | r.push(Dygraph.clone(o[i])); | |
1918 | } else { | |
1919 | r.push(o[i]); | |
1920 | } | |
1921 | } | |
1922 | return r; | |
24e5350c DV |
1923 | }; |
1924 | ||
2dda3850 | 1925 | |
79420a1e | 1926 | /** |
6a1aa64f DV |
1927 | * Get the CSV data. If it's in a function, call that function. If it's in a |
1928 | * file, do an XMLHttpRequest to get it. | |
1929 | * @private | |
1930 | */ | |
285a6bda | 1931 | Dygraph.prototype.start_ = function() { |
6a1aa64f | 1932 | if (typeof this.file_ == 'function') { |
285a6bda | 1933 | // CSV string. Pretend we got it via XHR. |
6a1aa64f | 1934 | this.loadedEvent_(this.file_()); |
2dda3850 | 1935 | } else if (Dygraph.isArrayLike(this.file_)) { |
285a6bda DV |
1936 | this.rawData_ = this.parseArray_(this.file_); |
1937 | this.drawGraph_(this.rawData_); | |
79420a1e DV |
1938 | } else if (typeof this.file_ == 'object' && |
1939 | typeof this.file_.getColumnRange == 'function') { | |
1940 | // must be a DataTable from gviz. | |
1941 | this.rawData_ = this.parseDataTable_(this.file_); | |
1942 | this.drawGraph_(this.rawData_); | |
285a6bda DV |
1943 | } else if (typeof this.file_ == 'string') { |
1944 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. | |
1945 | if (this.file_.indexOf('\n') >= 0) { | |
1946 | this.loadedEvent_(this.file_); | |
1947 | } else { | |
1948 | var req = new XMLHttpRequest(); | |
1949 | var caller = this; | |
1950 | req.onreadystatechange = function () { | |
1951 | if (req.readyState == 4) { | |
1952 | if (req.status == 200) { | |
1953 | caller.loadedEvent_(req.responseText); | |
1954 | } | |
6a1aa64f | 1955 | } |
285a6bda | 1956 | }; |
6a1aa64f | 1957 | |
285a6bda DV |
1958 | req.open("GET", this.file_, true); |
1959 | req.send(null); | |
1960 | } | |
1961 | } else { | |
1962 | this.error("Unknown data format: " + (typeof this.file_)); | |
6a1aa64f DV |
1963 | } |
1964 | }; | |
1965 | ||
1966 | /** | |
1967 | * Changes various properties of the graph. These can include: | |
1968 | * <ul> | |
1969 | * <li>file: changes the source data for the graph</li> | |
1970 | * <li>errorBars: changes whether the data contains stddev</li> | |
1971 | * </ul> | |
1972 | * @param {Object} attrs The new properties and values | |
1973 | */ | |
285a6bda DV |
1974 | Dygraph.prototype.updateOptions = function(attrs) { |
1975 | // TODO(danvk): this is a mess. Rethink this function. | |
6a1aa64f DV |
1976 | if (attrs.rollPeriod) { |
1977 | this.rollPeriod_ = attrs.rollPeriod; | |
1978 | } | |
1979 | if (attrs.dateWindow) { | |
1980 | this.dateWindow_ = attrs.dateWindow; | |
1981 | } | |
1982 | if (attrs.valueRange) { | |
1983 | this.valueRange_ = attrs.valueRange; | |
1984 | } | |
fc80a396 | 1985 | Dygraph.update(this.user_attrs_, attrs); |
285a6bda DV |
1986 | |
1987 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
1988 | ||
1989 | // TODO(danvk): this doesn't match the constructor logic | |
1990 | this.layout_.updateOptions({ 'errorBars': this.attr_("errorBars") }); | |
6a1aa64f DV |
1991 | if (attrs['file'] && attrs['file'] != this.file_) { |
1992 | this.file_ = attrs['file']; | |
1993 | this.start_(); | |
1994 | } else { | |
1995 | this.drawGraph_(this.rawData_); | |
1996 | } | |
1997 | }; | |
1998 | ||
1999 | /** | |
697e70b2 DV |
2000 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
2001 | * containing div (which has presumably changed size since the dygraph was | |
2002 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
2003 | * |
2004 | * This is far more efficient than destroying and re-instantiating a | |
2005 | * Dygraph, since it doesn't have to reparse the underlying data. | |
2006 | * | |
697e70b2 DV |
2007 | * @param {Number} width Width (in pixels) |
2008 | * @param {Number} height Height (in pixels) | |
2009 | */ | |
2010 | Dygraph.prototype.resize = function(width, height) { | |
2011 | if ((width === null) != (height === null)) { | |
2012 | this.warn("Dygraph.resize() should be called with zero parameters or " + | |
2013 | "two non-NULL parameters. Pretending it was zero."); | |
2014 | width = height = null; | |
2015 | } | |
2016 | ||
b16e6369 | 2017 | // TODO(danvk): there should be a clear() method. |
697e70b2 | 2018 | this.maindiv_.innerHTML = ""; |
b16e6369 DV |
2019 | this.attrs_.labelsDiv = null; |
2020 | ||
697e70b2 DV |
2021 | if (width) { |
2022 | this.maindiv_.style.width = width + "px"; | |
2023 | this.maindiv_.style.height = height + "px"; | |
2024 | this.width_ = width; | |
2025 | this.height_ = height; | |
2026 | } else { | |
2027 | this.width_ = this.maindiv_.offsetWidth; | |
2028 | this.height_ = this.maindiv_.offsetHeight; | |
2029 | } | |
2030 | ||
2031 | this.createInterface_(); | |
964f30c6 | 2032 | this.drawGraph_(this.rawData_); |
697e70b2 DV |
2033 | }; |
2034 | ||
2035 | /** | |
6a1aa64f DV |
2036 | * Adjusts the number of days in the rolling average. Updates the graph to |
2037 | * reflect the new averaging period. | |
2038 | * @param {Number} length Number of days over which to average the data. | |
2039 | */ | |
285a6bda | 2040 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f DV |
2041 | this.rollPeriod_ = length; |
2042 | this.drawGraph_(this.rawData_); | |
2043 | }; | |
540d00f1 | 2044 | |
f8cfec73 | 2045 | /** |
1cf11047 DV |
2046 | * Returns a boolean array of visibility statuses. |
2047 | */ | |
2048 | Dygraph.prototype.visibility = function() { | |
2049 | // Do lazy-initialization, so that this happens after we know the number of | |
2050 | // data series. | |
2051 | if (!this.attr_("visibility")) { | |
f38dec01 | 2052 | this.attrs_["visibility"] = []; |
1cf11047 DV |
2053 | } |
2054 | while (this.attr_("visibility").length < this.rawData_[0].length - 1) { | |
f38dec01 | 2055 | this.attr_("visibility").push(true); |
1cf11047 DV |
2056 | } |
2057 | return this.attr_("visibility"); | |
2058 | }; | |
2059 | ||
2060 | /** | |
2061 | * Changes the visiblity of a series. | |
2062 | */ | |
2063 | Dygraph.prototype.setVisibility = function(num, value) { | |
2064 | var x = this.visibility(); | |
2065 | if (num < 0 && num >= x.length) { | |
2066 | this.warn("invalid series number in setVisibility: " + num); | |
2067 | } else { | |
2068 | x[num] = value; | |
2069 | this.drawGraph_(this.rawData_); | |
2070 | } | |
2071 | }; | |
2072 | ||
2073 | /** | |
f8cfec73 DV |
2074 | * Create a new canvas element. This is more complex than a simple |
2075 | * document.createElement("canvas") because of IE and excanvas. | |
2076 | */ | |
2077 | Dygraph.createCanvas = function() { | |
2078 | var canvas = document.createElement("canvas"); | |
2079 | ||
2080 | isIE = (/MSIE/.test(navigator.userAgent) && !window.opera); | |
2081 | if (isIE) { | |
2082 | canvas = G_vmlCanvasManager.initElement(canvas); | |
2083 | } | |
2084 | ||
2085 | return canvas; | |
2086 | }; | |
2087 | ||
540d00f1 DV |
2088 | |
2089 | /** | |
285a6bda | 2090 | * A wrapper around Dygraph that implements the gviz API. |
540d00f1 DV |
2091 | * @param {Object} container The DOM object the visualization should live in. |
2092 | */ | |
285a6bda | 2093 | Dygraph.GVizChart = function(container) { |
540d00f1 DV |
2094 | this.container = container; |
2095 | } | |
2096 | ||
285a6bda | 2097 | Dygraph.GVizChart.prototype.draw = function(data, options) { |
540d00f1 | 2098 | this.container.innerHTML = ''; |
285a6bda | 2099 | this.date_graph = new Dygraph(this.container, data, options); |
540d00f1 | 2100 | } |
285a6bda DV |
2101 | |
2102 | // Older pages may still use this name. | |
2103 | DateGraph = Dygraph; |