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6a1aa64f DV |
1 | // Copyright 2006 Dan Vanderkam (danvdk@gmail.com) |
2 | // All Rights Reserved. | |
3 | ||
4 | /** | |
5 | * @fileoverview Creates an interactive, zoomable graph based on a CSV file or | |
285a6bda DV |
6 | * string. Dygraph can handle multiple series with or without error bars. The |
7 | * date/value ranges will be automatically set. Dygraph uses the | |
6a1aa64f DV |
8 | * <canvas> tag, so it only works in FF1.5+. |
9 | * @author danvdk@gmail.com (Dan Vanderkam) | |
10 | ||
11 | Usage: | |
12 | <div id="graphdiv" style="width:800px; height:500px;"></div> | |
13 | <script type="text/javascript"> | |
285a6bda DV |
14 | new Dygraph(document.getElementById("graphdiv"), |
15 | "datafile.csv", // CSV file with headers | |
16 | { }); // options | |
6a1aa64f DV |
17 | </script> |
18 | ||
19 | The CSV file is of the form | |
20 | ||
285a6bda | 21 | Date,SeriesA,SeriesB,SeriesC |
6a1aa64f DV |
22 | YYYYMMDD,A1,B1,C1 |
23 | YYYYMMDD,A2,B2,C2 | |
24 | ||
6a1aa64f DV |
25 | If the 'errorBars' option is set in the constructor, the input should be of |
26 | the form | |
27 | ||
285a6bda | 28 | Date,SeriesA,SeriesB,... |
6a1aa64f DV |
29 | YYYYMMDD,A1,sigmaA1,B1,sigmaB1,... |
30 | YYYYMMDD,A2,sigmaA2,B2,sigmaB2,... | |
31 | ||
32 | If the 'fractions' option is set, the input should be of the form: | |
33 | ||
285a6bda | 34 | Date,SeriesA,SeriesB,... |
6a1aa64f DV |
35 | YYYYMMDD,A1/B1,A2/B2,... |
36 | YYYYMMDD,A1/B1,A2/B2,... | |
37 | ||
38 | And error bars will be calculated automatically using a binomial distribution. | |
39 | ||
285a6bda | 40 | For further documentation and examples, see http://www.danvk.org/dygraphs |
6a1aa64f DV |
41 | |
42 | */ | |
43 | ||
44 | /** | |
45 | * An interactive, zoomable graph | |
46 | * @param {String | Function} file A file containing CSV data or a function that | |
47 | * returns this data. The expected format for each line is | |
48 | * YYYYMMDD,val1,val2,... or, if attrs.errorBars is set, | |
49 | * YYYYMMDD,val1,stddev1,val2,stddev2,... | |
6a1aa64f DV |
50 | * @param {Object} attrs Various other attributes, e.g. errorBars determines |
51 | * whether the input data contains error ranges. | |
52 | */ | |
285a6bda DV |
53 | Dygraph = function(div, data, opts) { |
54 | if (arguments.length > 0) { | |
55 | if (arguments.length == 4) { | |
56 | // Old versions of dygraphs took in the series labels as a constructor | |
57 | // parameter. This doesn't make sense anymore, but it's easy to continue | |
58 | // to support this usage. | |
59 | this.warn("Using deprecated four-argument dygraph constructor"); | |
60 | this.__old_init__(div, data, arguments[2], arguments[3]); | |
61 | } else { | |
62 | this.__init__(div, data, opts); | |
63 | } | |
64 | } | |
6a1aa64f DV |
65 | }; |
66 | ||
285a6bda DV |
67 | Dygraph.NAME = "Dygraph"; |
68 | Dygraph.VERSION = "1.2"; | |
69 | Dygraph.__repr__ = function() { | |
6a1aa64f DV |
70 | return "[" + this.NAME + " " + this.VERSION + "]"; |
71 | }; | |
285a6bda | 72 | Dygraph.toString = function() { |
6a1aa64f DV |
73 | return this.__repr__(); |
74 | }; | |
75 | ||
76 | // Various default values | |
285a6bda DV |
77 | Dygraph.DEFAULT_ROLL_PERIOD = 1; |
78 | Dygraph.DEFAULT_WIDTH = 480; | |
79 | Dygraph.DEFAULT_HEIGHT = 320; | |
80 | Dygraph.AXIS_LINE_WIDTH = 0.3; | |
6a1aa64f | 81 | |
8e4a6af3 | 82 | // Default attribute values. |
285a6bda | 83 | Dygraph.DEFAULT_ATTRS = { |
a9fc39ab | 84 | highlightCircleSize: 3, |
8e4a6af3 | 85 | pixelsPerXLabel: 60, |
c6336f04 | 86 | pixelsPerYLabel: 30, |
285a6bda | 87 | |
8e4a6af3 DV |
88 | labelsDivWidth: 250, |
89 | labelsDivStyles: { | |
90 | // TODO(danvk): move defaults from createStatusMessage_ here. | |
285a6bda DV |
91 | }, |
92 | labelsSeparateLines: false, | |
bcd3ebf0 | 93 | labelsShowZeroValues: true, |
285a6bda | 94 | labelsKMB: false, |
afefbcdb | 95 | labelsKMG2: false, |
d160cc3b | 96 | showLabelsOnHighlight: true, |
12e4c741 | 97 | |
029da4b6 | 98 | yValueFormatter: function(x) { return Dygraph.round_(x, 2); }, |
285a6bda DV |
99 | |
100 | strokeWidth: 1.0, | |
8e4a6af3 | 101 | |
8846615a DV |
102 | axisTickSize: 3, |
103 | axisLabelFontSize: 14, | |
104 | xAxisLabelWidth: 50, | |
105 | yAxisLabelWidth: 50, | |
bf640e56 | 106 | xAxisLabelFormatter: Dygraph.dateAxisFormatter, |
8846615a | 107 | rightGap: 5, |
285a6bda DV |
108 | |
109 | showRoller: false, | |
110 | xValueFormatter: Dygraph.dateString_, | |
111 | xValueParser: Dygraph.dateParser, | |
112 | xTicker: Dygraph.dateTicker, | |
113 | ||
3d67f03b DV |
114 | delimiter: ',', |
115 | ||
ff00d3e2 | 116 | logScale: false, |
285a6bda DV |
117 | sigma: 2.0, |
118 | errorBars: false, | |
119 | fractions: false, | |
120 | wilsonInterval: true, // only relevant if fractions is true | |
5954ef32 | 121 | customBars: false, |
43af96e7 NK |
122 | fillGraph: false, |
123 | fillAlpha: 0.15, | |
f032c51d | 124 | connectSeparatedPoints: false, |
43af96e7 NK |
125 | |
126 | stackedGraph: false, | |
afdc483f NN |
127 | hideOverlayOnMouseOut: true, |
128 | ||
00c281d4 NN |
129 | stepPlot: false, |
130 | avoidMinZero: false | |
285a6bda DV |
131 | }; |
132 | ||
133 | // Various logging levels. | |
134 | Dygraph.DEBUG = 1; | |
135 | Dygraph.INFO = 2; | |
136 | Dygraph.WARNING = 3; | |
137 | Dygraph.ERROR = 3; | |
138 | ||
5c528fa2 DV |
139 | // Used for initializing annotation CSS rules only once. |
140 | Dygraph.addedAnnotationCSS = false; | |
141 | ||
285a6bda DV |
142 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { |
143 | // Labels is no longer a constructor parameter, since it's typically set | |
144 | // directly from the data source. It also conains a name for the x-axis, | |
145 | // which the previous constructor form did not. | |
146 | if (labels != null) { | |
147 | var new_labels = ["Date"]; | |
148 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); | |
fc80a396 | 149 | Dygraph.update(attrs, { 'labels': new_labels }); |
285a6bda DV |
150 | } |
151 | this.__init__(div, file, attrs); | |
8e4a6af3 DV |
152 | }; |
153 | ||
6a1aa64f | 154 | /** |
285a6bda | 155 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
6a1aa64f DV |
156 | * and interaction <canvas> inside of it. See the constructor for details |
157 | * on the parameters. | |
12e4c741 | 158 | * @param {Element} div the Element to render the graph into. |
6a1aa64f | 159 | * @param {String | Function} file Source data |
6a1aa64f DV |
160 | * @param {Object} attrs Miscellaneous other options |
161 | * @private | |
162 | */ | |
285a6bda DV |
163 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
164 | // Support two-argument constructor | |
165 | if (attrs == null) { attrs = {}; } | |
166 | ||
6a1aa64f | 167 | // Copy the important bits into the object |
32988383 | 168 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
6a1aa64f | 169 | this.maindiv_ = div; |
6a1aa64f | 170 | this.file_ = file; |
285a6bda | 171 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
6a1aa64f | 172 | this.previousVerticalX_ = -1; |
6a1aa64f | 173 | this.fractions_ = attrs.fractions || false; |
6a1aa64f | 174 | this.dateWindow_ = attrs.dateWindow || null; |
6a1aa64f | 175 | this.wilsonInterval_ = attrs.wilsonInterval || true; |
fe0b7c03 | 176 | this.is_initial_draw_ = true; |
5c528fa2 | 177 | this.annotations_ = []; |
8e4a6af3 | 178 | |
f7d6278e DV |
179 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
180 | // div, then only one will be drawn. | |
181 | div.innerHTML = ""; | |
182 | ||
c21d2c2d | 183 | // If the div isn't already sized then inherit from our attrs or |
184 | // give it a default size. | |
285a6bda | 185 | if (div.style.width == '') { |
c21d2c2d | 186 | div.style.width = attrs.width || Dygraph.DEFAULT_WIDTH + "px"; |
285a6bda DV |
187 | } |
188 | if (div.style.height == '') { | |
c21d2c2d | 189 | div.style.height = attrs.height || Dygraph.DEFAULT_HEIGHT + "px"; |
32988383 | 190 | } |
285a6bda DV |
191 | this.width_ = parseInt(div.style.width, 10); |
192 | this.height_ = parseInt(div.style.height, 10); | |
c21d2c2d | 193 | // The div might have been specified as percent of the current window size, |
194 | // convert that to an appropriate number of pixels. | |
195 | if (div.style.width.indexOf("%") == div.style.width.length - 1) { | |
c6f45033 | 196 | this.width_ = div.offsetWidth; |
c21d2c2d | 197 | } |
198 | if (div.style.height.indexOf("%") == div.style.height.length - 1) { | |
c6f45033 | 199 | this.height_ = div.offsetHeight; |
c21d2c2d | 200 | } |
32988383 | 201 | |
10a6456d DV |
202 | if (this.width_ == 0) { |
203 | this.error("dygraph has zero width. Please specify a width in pixels."); | |
204 | } | |
205 | if (this.height_ == 0) { | |
206 | this.error("dygraph has zero height. Please specify a height in pixels."); | |
207 | } | |
208 | ||
344ba8c0 | 209 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
43af96e7 NK |
210 | if (attrs['stackedGraph']) { |
211 | attrs['fillGraph'] = true; | |
212 | // TODO(nikhilk): Add any other stackedGraph checks here. | |
213 | } | |
214 | ||
285a6bda DV |
215 | // Dygraphs has many options, some of which interact with one another. |
216 | // To keep track of everything, we maintain two sets of options: | |
217 | // | |
c21d2c2d | 218 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
219 | // this.attrs_ defaults, options derived from user_attrs_, data. |
220 | // | |
221 | // Options are then accessed this.attr_('attr'), which first looks at | |
222 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
223 | // defaults without overriding behavior that the user specifically asks for. | |
224 | this.user_attrs_ = {}; | |
fc80a396 | 225 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 226 | |
285a6bda | 227 | this.attrs_ = {}; |
fc80a396 | 228 | Dygraph.update(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 229 | |
16269f6e | 230 | this.boundaryIds_ = []; |
6a1aa64f | 231 | |
285a6bda DV |
232 | // Make a note of whether labels will be pulled from the CSV file. |
233 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
6a1aa64f DV |
234 | |
235 | // Create the containing DIV and other interactive elements | |
236 | this.createInterface_(); | |
237 | ||
738fc797 | 238 | this.start_(); |
6a1aa64f DV |
239 | }; |
240 | ||
227b93cc DV |
241 | Dygraph.prototype.attr_ = function(name, seriesName) { |
242 | if (seriesName && | |
243 | typeof(this.user_attrs_[seriesName]) != 'undefined' && | |
244 | this.user_attrs_[seriesName] != null && | |
245 | typeof(this.user_attrs_[seriesName][name]) != 'undefined') { | |
246 | return this.user_attrs_[seriesName][name]; | |
450fe64b | 247 | } else if (typeof(this.user_attrs_[name]) != 'undefined') { |
285a6bda DV |
248 | return this.user_attrs_[name]; |
249 | } else if (typeof(this.attrs_[name]) != 'undefined') { | |
250 | return this.attrs_[name]; | |
251 | } else { | |
252 | return null; | |
253 | } | |
254 | }; | |
255 | ||
256 | // TODO(danvk): any way I can get the line numbers to be this.warn call? | |
257 | Dygraph.prototype.log = function(severity, message) { | |
258 | if (typeof(console) != 'undefined') { | |
259 | switch (severity) { | |
260 | case Dygraph.DEBUG: | |
261 | console.debug('dygraphs: ' + message); | |
262 | break; | |
263 | case Dygraph.INFO: | |
264 | console.info('dygraphs: ' + message); | |
265 | break; | |
266 | case Dygraph.WARNING: | |
267 | console.warn('dygraphs: ' + message); | |
268 | break; | |
269 | case Dygraph.ERROR: | |
270 | console.error('dygraphs: ' + message); | |
271 | break; | |
272 | } | |
273 | } | |
274 | } | |
275 | Dygraph.prototype.info = function(message) { | |
276 | this.log(Dygraph.INFO, message); | |
277 | } | |
278 | Dygraph.prototype.warn = function(message) { | |
279 | this.log(Dygraph.WARNING, message); | |
280 | } | |
281 | Dygraph.prototype.error = function(message) { | |
282 | this.log(Dygraph.ERROR, message); | |
283 | } | |
284 | ||
6a1aa64f DV |
285 | /** |
286 | * Returns the current rolling period, as set by the user or an option. | |
287 | * @return {Number} The number of days in the rolling window | |
288 | */ | |
285a6bda | 289 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 290 | return this.rollPeriod_; |
76171648 DV |
291 | }; |
292 | ||
599fb4ad DV |
293 | /** |
294 | * Returns the currently-visible x-range. This can be affected by zooming, | |
295 | * panning or a call to updateOptions. | |
296 | * Returns a two-element array: [left, right]. | |
297 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
298 | */ | |
299 | Dygraph.prototype.xAxisRange = function() { | |
300 | if (this.dateWindow_) return this.dateWindow_; | |
301 | ||
302 | // The entire chart is visible. | |
303 | var left = this.rawData_[0][0]; | |
304 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
305 | return [left, right]; | |
306 | }; | |
307 | ||
3230c662 DV |
308 | /** |
309 | * Returns the currently-visible y-range. This can be affected by zooming, | |
310 | * panning or a call to updateOptions. | |
311 | * Returns a two-element array: [bottom, top]. | |
312 | */ | |
313 | Dygraph.prototype.yAxisRange = function() { | |
314 | return this.displayedYRange_; | |
315 | }; | |
316 | ||
317 | /** | |
318 | * Convert from data coordinates to canvas/div X/Y coordinates. | |
319 | * Returns a two-element array: [X, Y] | |
320 | */ | |
321 | Dygraph.prototype.toDomCoords = function(x, y) { | |
322 | var ret = [null, null]; | |
323 | var area = this.plotter_.area; | |
324 | if (x !== null) { | |
325 | var xRange = this.xAxisRange(); | |
326 | ret[0] = area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; | |
327 | } | |
328 | ||
329 | if (y !== null) { | |
330 | var yRange = this.yAxisRange(); | |
891ad846 | 331 | ret[1] = area.y + (yRange[1] - y) / (yRange[1] - yRange[0]) * area.h; |
3230c662 DV |
332 | } |
333 | ||
334 | return ret; | |
335 | }; | |
336 | ||
56623f3b | 337 | // TODO(danvk): use these functions throughout dygraphs. |
3230c662 DV |
338 | /** |
339 | * Convert from canvas/div coords to data coordinates. | |
340 | * Returns a two-element array: [X, Y] | |
341 | */ | |
342 | Dygraph.prototype.toDataCoords = function(x, y) { | |
343 | var ret = [null, null]; | |
344 | var area = this.plotter_.area; | |
345 | if (x !== null) { | |
346 | var xRange = this.xAxisRange(); | |
347 | ret[0] = xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); | |
348 | } | |
349 | ||
350 | if (y !== null) { | |
351 | var yRange = this.yAxisRange(); | |
352 | ret[1] = yRange[0] + (area.h - y) / area.h * (yRange[1] - yRange[0]); | |
353 | } | |
354 | ||
355 | return ret; | |
356 | }; | |
357 | ||
e99fde05 DV |
358 | /** |
359 | * Returns the number of columns (including the independent variable). | |
360 | */ | |
361 | Dygraph.prototype.numColumns = function() { | |
362 | return this.rawData_[0].length; | |
363 | }; | |
364 | ||
365 | /** | |
366 | * Returns the number of rows (excluding any header/label row). | |
367 | */ | |
368 | Dygraph.prototype.numRows = function() { | |
369 | return this.rawData_.length; | |
370 | }; | |
371 | ||
372 | /** | |
373 | * Returns the value in the given row and column. If the row and column exceed | |
374 | * the bounds on the data, returns null. Also returns null if the value is | |
375 | * missing. | |
376 | */ | |
377 | Dygraph.prototype.getValue = function(row, col) { | |
378 | if (row < 0 || row > this.rawData_.length) return null; | |
379 | if (col < 0 || col > this.rawData_[row].length) return null; | |
380 | ||
381 | return this.rawData_[row][col]; | |
382 | }; | |
383 | ||
76171648 DV |
384 | Dygraph.addEvent = function(el, evt, fn) { |
385 | var normed_fn = function(e) { | |
386 | if (!e) var e = window.event; | |
387 | fn(e); | |
388 | }; | |
389 | if (window.addEventListener) { // Mozilla, Netscape, Firefox | |
390 | el.addEventListener(evt, normed_fn, false); | |
391 | } else { // IE | |
392 | el.attachEvent('on' + evt, normed_fn); | |
393 | } | |
394 | }; | |
6a1aa64f | 395 | |
4c47502d DV |
396 | Dygraph.clipCanvas_ = function(cnv, clip) { |
397 | var ctx = cnv.getContext("2d"); | |
398 | ctx.beginPath(); | |
399 | ctx.rect(clip.left, clip.top, clip.width, clip.height); | |
400 | ctx.clip(); | |
401 | }; | |
402 | ||
6a1aa64f | 403 | /** |
285a6bda | 404 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 405 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 406 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
407 | * @private |
408 | */ | |
285a6bda | 409 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
410 | // Create the all-enclosing graph div |
411 | var enclosing = this.maindiv_; | |
412 | ||
b0c3b730 DV |
413 | this.graphDiv = document.createElement("div"); |
414 | this.graphDiv.style.width = this.width_ + "px"; | |
415 | this.graphDiv.style.height = this.height_ + "px"; | |
416 | enclosing.appendChild(this.graphDiv); | |
417 | ||
4c47502d DV |
418 | var clip = { |
419 | top: 0, | |
420 | left: this.attr_("yAxisLabelWidth") + 2 * this.attr_("axisTickSize") | |
421 | }; | |
422 | clip.width = this.width_ - clip.left - this.attr_("rightGap"); | |
423 | clip.height = this.height_ - this.attr_("axisLabelFontSize") | |
424 | - 2 * this.attr_("axisTickSize"); | |
425 | this.clippingArea_ = clip; | |
426 | ||
b0c3b730 | 427 | // Create the canvas for interactive parts of the chart. |
f8cfec73 | 428 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 DV |
429 | this.canvas_.style.position = "absolute"; |
430 | this.canvas_.width = this.width_; | |
431 | this.canvas_.height = this.height_; | |
f8cfec73 DV |
432 | this.canvas_.style.width = this.width_ + "px"; // for IE |
433 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
b0c3b730 DV |
434 | |
435 | // ... and for static parts of the chart. | |
6a1aa64f | 436 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
76171648 | 437 | |
eb7bf005 EC |
438 | // The interactive parts of the graph are drawn on top of the chart. |
439 | this.graphDiv.appendChild(this.hidden_); | |
440 | this.graphDiv.appendChild(this.canvas_); | |
441 | this.mouseEventElement_ = this.canvas_; | |
442 | ||
4c47502d DV |
443 | // Make sure we don't overdraw. |
444 | Dygraph.clipCanvas_(this.hidden_, this.clippingArea_); | |
445 | Dygraph.clipCanvas_(this.canvas_, this.clippingArea_); | |
446 | ||
76171648 | 447 | var dygraph = this; |
eb7bf005 | 448 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(e) { |
76171648 DV |
449 | dygraph.mouseMove_(e); |
450 | }); | |
eb7bf005 | 451 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(e) { |
76171648 DV |
452 | dygraph.mouseOut_(e); |
453 | }); | |
697e70b2 DV |
454 | |
455 | // Create the grapher | |
456 | // TODO(danvk): why does the Layout need its own set of options? | |
457 | this.layoutOptions_ = { 'xOriginIsZero': false }; | |
458 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
459 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
460 | Dygraph.update(this.layoutOptions_, { | |
461 | 'errorBars': (this.attr_("errorBars") || this.attr_("customBars")) }); | |
462 | ||
463 | this.layout_ = new DygraphLayout(this, this.layoutOptions_); | |
464 | ||
465 | // TODO(danvk): why does the Renderer need its own set of options? | |
466 | this.renderOptions_ = { colorScheme: this.colors_, | |
467 | strokeColor: null, | |
468 | axisLineWidth: Dygraph.AXIS_LINE_WIDTH }; | |
469 | Dygraph.update(this.renderOptions_, this.attrs_); | |
470 | Dygraph.update(this.renderOptions_, this.user_attrs_); | |
471 | this.plotter_ = new DygraphCanvasRenderer(this, | |
472 | this.hidden_, this.layout_, | |
473 | this.renderOptions_); | |
474 | ||
475 | this.createStatusMessage_(); | |
476 | this.createRollInterface_(); | |
477 | this.createDragInterface_(); | |
4cfcc38c DV |
478 | }; |
479 | ||
480 | /** | |
481 | * Detach DOM elements in the dygraph and null out all data references. | |
482 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
483 | * usage. See, e.g., the tests/perf.html example. | |
484 | */ | |
485 | Dygraph.prototype.destroy = function() { | |
486 | var removeRecursive = function(node) { | |
487 | while (node.hasChildNodes()) { | |
488 | removeRecursive(node.firstChild); | |
489 | node.removeChild(node.firstChild); | |
490 | } | |
491 | }; | |
492 | removeRecursive(this.maindiv_); | |
493 | ||
494 | var nullOut = function(obj) { | |
495 | for (var n in obj) { | |
496 | if (typeof(obj[n]) === 'object') { | |
497 | obj[n] = null; | |
498 | } | |
499 | } | |
500 | }; | |
501 | ||
502 | // These may not all be necessary, but it can't hurt... | |
503 | nullOut(this.layout_); | |
504 | nullOut(this.plotter_); | |
505 | nullOut(this); | |
506 | }; | |
6a1aa64f DV |
507 | |
508 | /** | |
509 | * Creates the canvas containing the PlotKit graph. Only plotkit ever draws on | |
285a6bda | 510 | * this particular canvas. All Dygraph work is done on this.canvas_. |
8846615a | 511 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
512 | * @return {Object} The newly-created canvas |
513 | * @private | |
514 | */ | |
285a6bda | 515 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 | 516 | var h = Dygraph.createCanvas(); |
6a1aa64f | 517 | h.style.position = "absolute"; |
9ac5e4ae DV |
518 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
519 | // some extra area to make it easier to zoom in on the far left and far | |
520 | // right. h needs to be precisely the plot area, so that clipping occurs. | |
6a1aa64f DV |
521 | h.style.top = canvas.style.top; |
522 | h.style.left = canvas.style.left; | |
523 | h.width = this.width_; | |
524 | h.height = this.height_; | |
f8cfec73 DV |
525 | h.style.width = this.width_ + "px"; // for IE |
526 | h.style.height = this.height_ + "px"; // for IE | |
6a1aa64f DV |
527 | return h; |
528 | }; | |
529 | ||
f474c2a3 DV |
530 | // Taken from MochiKit.Color |
531 | Dygraph.hsvToRGB = function (hue, saturation, value) { | |
532 | var red; | |
533 | var green; | |
534 | var blue; | |
535 | if (saturation === 0) { | |
536 | red = value; | |
537 | green = value; | |
538 | blue = value; | |
539 | } else { | |
540 | var i = Math.floor(hue * 6); | |
541 | var f = (hue * 6) - i; | |
542 | var p = value * (1 - saturation); | |
543 | var q = value * (1 - (saturation * f)); | |
544 | var t = value * (1 - (saturation * (1 - f))); | |
545 | switch (i) { | |
546 | case 1: red = q; green = value; blue = p; break; | |
547 | case 2: red = p; green = value; blue = t; break; | |
548 | case 3: red = p; green = q; blue = value; break; | |
549 | case 4: red = t; green = p; blue = value; break; | |
550 | case 5: red = value; green = p; blue = q; break; | |
551 | case 6: // fall through | |
552 | case 0: red = value; green = t; blue = p; break; | |
553 | } | |
554 | } | |
555 | red = Math.floor(255 * red + 0.5); | |
556 | green = Math.floor(255 * green + 0.5); | |
557 | blue = Math.floor(255 * blue + 0.5); | |
558 | return 'rgb(' + red + ',' + green + ',' + blue + ')'; | |
559 | }; | |
560 | ||
561 | ||
6a1aa64f DV |
562 | /** |
563 | * Generate a set of distinct colors for the data series. This is done with a | |
564 | * color wheel. Saturation/Value are customizable, and the hue is | |
565 | * equally-spaced around the color wheel. If a custom set of colors is | |
566 | * specified, that is used instead. | |
6a1aa64f DV |
567 | * @private |
568 | */ | |
285a6bda DV |
569 | Dygraph.prototype.setColors_ = function() { |
570 | // TODO(danvk): compute this directly into this.attrs_['colorScheme'] and do | |
571 | // away with this.renderOptions_. | |
572 | var num = this.attr_("labels").length - 1; | |
6a1aa64f | 573 | this.colors_ = []; |
285a6bda DV |
574 | var colors = this.attr_('colors'); |
575 | if (!colors) { | |
576 | var sat = this.attr_('colorSaturation') || 1.0; | |
577 | var val = this.attr_('colorValue') || 0.5; | |
2aa21213 | 578 | var half = Math.ceil(num / 2); |
6a1aa64f | 579 | for (var i = 1; i <= num; i++) { |
ec1959eb | 580 | if (!this.visibility()[i-1]) continue; |
43af96e7 | 581 | // alternate colors for high contrast. |
2aa21213 | 582 | var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2); |
43af96e7 NK |
583 | var hue = (1.0 * idx/ (1 + num)); |
584 | this.colors_.push(Dygraph.hsvToRGB(hue, sat, val)); | |
6a1aa64f DV |
585 | } |
586 | } else { | |
587 | for (var i = 0; i < num; i++) { | |
ec1959eb | 588 | if (!this.visibility()[i]) continue; |
285a6bda | 589 | var colorStr = colors[i % colors.length]; |
f474c2a3 | 590 | this.colors_.push(colorStr); |
6a1aa64f DV |
591 | } |
592 | } | |
285a6bda | 593 | |
c21d2c2d | 594 | // TODO(danvk): update this w/r/t/ the new options system. |
285a6bda | 595 | this.renderOptions_.colorScheme = this.colors_; |
fc80a396 DV |
596 | Dygraph.update(this.plotter_.options, this.renderOptions_); |
597 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
598 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
6a1aa64f DV |
599 | } |
600 | ||
43af96e7 NK |
601 | /** |
602 | * Return the list of colors. This is either the list of colors passed in the | |
603 | * attributes, or the autogenerated list of rgb(r,g,b) strings. | |
604 | * @return {Array<string>} The list of colors. | |
605 | */ | |
606 | Dygraph.prototype.getColors = function() { | |
607 | return this.colors_; | |
608 | }; | |
609 | ||
5e60386d DV |
610 | // The following functions are from quirksmode.org with a modification for Safari from |
611 | // http://blog.firetree.net/2005/07/04/javascript-find-position/ | |
3df0ccf0 DV |
612 | // http://www.quirksmode.org/js/findpos.html |
613 | Dygraph.findPosX = function(obj) { | |
614 | var curleft = 0; | |
5e60386d | 615 | if(obj.offsetParent) |
50360fd0 | 616 | while(1) |
5e60386d | 617 | { |
3df0ccf0 | 618 | curleft += obj.offsetLeft; |
5e60386d DV |
619 | if(!obj.offsetParent) |
620 | break; | |
3df0ccf0 DV |
621 | obj = obj.offsetParent; |
622 | } | |
5e60386d | 623 | else if(obj.x) |
3df0ccf0 DV |
624 | curleft += obj.x; |
625 | return curleft; | |
626 | }; | |
c21d2c2d | 627 | |
3df0ccf0 DV |
628 | Dygraph.findPosY = function(obj) { |
629 | var curtop = 0; | |
5e60386d DV |
630 | if(obj.offsetParent) |
631 | while(1) | |
632 | { | |
3df0ccf0 | 633 | curtop += obj.offsetTop; |
5e60386d DV |
634 | if(!obj.offsetParent) |
635 | break; | |
3df0ccf0 DV |
636 | obj = obj.offsetParent; |
637 | } | |
5e60386d | 638 | else if(obj.y) |
3df0ccf0 DV |
639 | curtop += obj.y; |
640 | return curtop; | |
641 | }; | |
642 | ||
5e60386d | 643 | |
71a11a8e | 644 | |
6a1aa64f DV |
645 | /** |
646 | * Create the div that contains information on the selected point(s) | |
647 | * This goes in the top right of the canvas, unless an external div has already | |
648 | * been specified. | |
649 | * @private | |
650 | */ | |
fedbd797 | 651 | Dygraph.prototype.createStatusMessage_ = function() { |
652 | var userLabelsDiv = this.user_attrs_["labelsDiv"]; | |
653 | if (userLabelsDiv && null != userLabelsDiv | |
654 | && (typeof(userLabelsDiv) == "string" || userLabelsDiv instanceof String)) { | |
655 | this.user_attrs_["labelsDiv"] = document.getElementById(userLabelsDiv); | |
656 | } | |
285a6bda DV |
657 | if (!this.attr_("labelsDiv")) { |
658 | var divWidth = this.attr_('labelsDivWidth'); | |
b0c3b730 | 659 | var messagestyle = { |
6a1aa64f DV |
660 | "position": "absolute", |
661 | "fontSize": "14px", | |
662 | "zIndex": 10, | |
663 | "width": divWidth + "px", | |
664 | "top": "0px", | |
8846615a | 665 | "left": (this.width_ - divWidth - 2) + "px", |
6a1aa64f DV |
666 | "background": "white", |
667 | "textAlign": "left", | |
b0c3b730 | 668 | "overflow": "hidden"}; |
fc80a396 | 669 | Dygraph.update(messagestyle, this.attr_('labelsDivStyles')); |
b0c3b730 DV |
670 | var div = document.createElement("div"); |
671 | for (var name in messagestyle) { | |
85b99f0b DV |
672 | if (messagestyle.hasOwnProperty(name)) { |
673 | div.style[name] = messagestyle[name]; | |
674 | } | |
b0c3b730 DV |
675 | } |
676 | this.graphDiv.appendChild(div); | |
285a6bda | 677 | this.attrs_.labelsDiv = div; |
6a1aa64f DV |
678 | } |
679 | }; | |
680 | ||
681 | /** | |
682 | * Create the text box to adjust the averaging period | |
683 | * @return {Object} The newly-created text box | |
684 | * @private | |
685 | */ | |
285a6bda | 686 | Dygraph.prototype.createRollInterface_ = function() { |
285a6bda | 687 | var display = this.attr_('showRoller') ? "block" : "none"; |
b0c3b730 DV |
688 | var textAttr = { "position": "absolute", |
689 | "zIndex": 10, | |
690 | "top": (this.plotter_.area.h - 25) + "px", | |
691 | "left": (this.plotter_.area.x + 1) + "px", | |
692 | "display": display | |
6a1aa64f | 693 | }; |
b0c3b730 DV |
694 | var roller = document.createElement("input"); |
695 | roller.type = "text"; | |
696 | roller.size = "2"; | |
697 | roller.value = this.rollPeriod_; | |
698 | for (var name in textAttr) { | |
85b99f0b DV |
699 | if (textAttr.hasOwnProperty(name)) { |
700 | roller.style[name] = textAttr[name]; | |
701 | } | |
b0c3b730 DV |
702 | } |
703 | ||
6a1aa64f | 704 | var pa = this.graphDiv; |
b0c3b730 | 705 | pa.appendChild(roller); |
76171648 DV |
706 | var dygraph = this; |
707 | roller.onchange = function() { dygraph.adjustRoll(roller.value); }; | |
6a1aa64f | 708 | return roller; |
76171648 DV |
709 | }; |
710 | ||
711 | // These functions are taken from MochiKit.Signal | |
712 | Dygraph.pageX = function(e) { | |
713 | if (e.pageX) { | |
714 | return (!e.pageX || e.pageX < 0) ? 0 : e.pageX; | |
715 | } else { | |
716 | var de = document; | |
717 | var b = document.body; | |
718 | return e.clientX + | |
719 | (de.scrollLeft || b.scrollLeft) - | |
720 | (de.clientLeft || 0); | |
721 | } | |
722 | }; | |
723 | ||
724 | Dygraph.pageY = function(e) { | |
725 | if (e.pageY) { | |
726 | return (!e.pageY || e.pageY < 0) ? 0 : e.pageY; | |
727 | } else { | |
728 | var de = document; | |
729 | var b = document.body; | |
730 | return e.clientY + | |
731 | (de.scrollTop || b.scrollTop) - | |
732 | (de.clientTop || 0); | |
733 | } | |
734 | }; | |
6a1aa64f DV |
735 | |
736 | /** | |
737 | * Set up all the mouse handlers needed to capture dragging behavior for zoom | |
27385109 | 738 | * events. |
6a1aa64f DV |
739 | * @private |
740 | */ | |
285a6bda | 741 | Dygraph.prototype.createDragInterface_ = function() { |
6a1aa64f DV |
742 | var self = this; |
743 | ||
744 | // Tracks whether the mouse is down right now | |
bce01b0f | 745 | var isZooming = false; |
c776c216 | 746 | var isPanning = false; |
6a1aa64f DV |
747 | var dragStartX = null; |
748 | var dragStartY = null; | |
749 | var dragEndX = null; | |
750 | var dragEndY = null; | |
751 | var prevEndX = null; | |
bce01b0f DV |
752 | var draggingDate = null; |
753 | var dateRange = null; | |
6a1aa64f DV |
754 | |
755 | // Utility function to convert page-wide coordinates to canvas coords | |
67e650dc DV |
756 | var px = 0; |
757 | var py = 0; | |
76171648 | 758 | var getX = function(e) { return Dygraph.pageX(e) - px }; |
1e1bf7df | 759 | var getY = function(e) { return Dygraph.pageY(e) - py }; |
6a1aa64f DV |
760 | |
761 | // Draw zoom rectangles when the mouse is down and the user moves around | |
eb7bf005 | 762 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(event) { |
bce01b0f | 763 | if (isZooming) { |
6a1aa64f DV |
764 | dragEndX = getX(event); |
765 | dragEndY = getY(event); | |
766 | ||
767 | self.drawZoomRect_(dragStartX, dragEndX, prevEndX); | |
768 | prevEndX = dragEndX; | |
bce01b0f DV |
769 | } else if (isPanning) { |
770 | dragEndX = getX(event); | |
771 | dragEndY = getY(event); | |
772 | ||
773 | // Want to have it so that: | |
774 | // 1. draggingDate appears at dragEndX | |
775 | // 2. daterange = (dateWindow_[1] - dateWindow_[0]) is unaltered. | |
776 | ||
777 | self.dateWindow_[0] = draggingDate - (dragEndX / self.width_) * dateRange; | |
778 | self.dateWindow_[1] = self.dateWindow_[0] + dateRange; | |
779 | self.drawGraph_(self.rawData_); | |
6a1aa64f DV |
780 | } |
781 | }); | |
782 | ||
783 | // Track the beginning of drag events | |
eb7bf005 | 784 | Dygraph.addEvent(this.mouseEventElement_, 'mousedown', function(event) { |
3df0ccf0 DV |
785 | px = Dygraph.findPosX(self.canvas_); |
786 | py = Dygraph.findPosY(self.canvas_); | |
6a1aa64f DV |
787 | dragStartX = getX(event); |
788 | dragStartY = getY(event); | |
bce01b0f | 789 | |
2dab69c3 | 790 | if (event.altKey || event.shiftKey) { |
d12999d3 | 791 | if (!self.dateWindow_) return; // have to be zoomed in to pan. |
bce01b0f DV |
792 | isPanning = true; |
793 | dateRange = self.dateWindow_[1] - self.dateWindow_[0]; | |
d12999d3 DV |
794 | draggingDate = (dragStartX / self.width_) * dateRange + |
795 | self.dateWindow_[0]; | |
bce01b0f DV |
796 | } else { |
797 | isZooming = true; | |
798 | } | |
6a1aa64f DV |
799 | }); |
800 | ||
801 | // If the user releases the mouse button during a drag, but not over the | |
802 | // canvas, then it doesn't count as a zooming action. | |
76171648 | 803 | Dygraph.addEvent(document, 'mouseup', function(event) { |
bce01b0f DV |
804 | if (isZooming || isPanning) { |
805 | isZooming = false; | |
6a1aa64f DV |
806 | dragStartX = null; |
807 | dragStartY = null; | |
808 | } | |
bce01b0f DV |
809 | |
810 | if (isPanning) { | |
811 | isPanning = false; | |
812 | draggingDate = null; | |
813 | dateRange = null; | |
814 | } | |
6a1aa64f DV |
815 | }); |
816 | ||
817 | // Temporarily cancel the dragging event when the mouse leaves the graph | |
eb7bf005 | 818 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(event) { |
bce01b0f | 819 | if (isZooming) { |
6a1aa64f DV |
820 | dragEndX = null; |
821 | dragEndY = null; | |
822 | } | |
823 | }); | |
824 | ||
825 | // If the mouse is released on the canvas during a drag event, then it's a | |
826 | // zoom. Only do the zoom if it's over a large enough area (>= 10 pixels) | |
eb7bf005 | 827 | Dygraph.addEvent(this.mouseEventElement_, 'mouseup', function(event) { |
bce01b0f DV |
828 | if (isZooming) { |
829 | isZooming = false; | |
6a1aa64f DV |
830 | dragEndX = getX(event); |
831 | dragEndY = getY(event); | |
832 | var regionWidth = Math.abs(dragEndX - dragStartX); | |
833 | var regionHeight = Math.abs(dragEndY - dragStartY); | |
834 | ||
e2b5f2bc DV |
835 | if (regionWidth < 2 && regionHeight < 2 && |
836 | self.lastx_ != undefined && self.lastx_ != -1) { | |
2ad87eaa | 837 | // TODO(danvk): pass along more info about the points, e.g. 'x' |
1e1bf7df | 838 | if (self.attr_('clickCallback') != null) { |
1e1bf7df DV |
839 | self.attr_('clickCallback')(event, self.lastx_, self.selPoints_); |
840 | } | |
841 | if (self.attr_('pointClickCallback')) { | |
842 | // check if the click was on a particular point. | |
843 | var closestIdx = -1; | |
844 | var closestDistance = 0; | |
845 | for (var i = 0; i < self.selPoints_.length; i++) { | |
846 | var p = self.selPoints_[i]; | |
847 | var distance = Math.pow(p.canvasx - dragEndX, 2) + | |
848 | Math.pow(p.canvasy - dragEndY, 2); | |
849 | if (closestIdx == -1 || distance < closestDistance) { | |
850 | closestDistance = distance; | |
851 | closestIdx = i; | |
852 | } | |
853 | } | |
854 | ||
855 | // Allow any click within two pixels of the dot. | |
2ad87eaa | 856 | var radius = self.attr_('highlightCircleSize') + 2; |
1e1bf7df DV |
857 | if (closestDistance <= 5 * 5) { |
858 | self.attr_('pointClickCallback')(event, self.selPoints_[closestIdx]); | |
859 | } | |
860 | } | |
6a1aa64f DV |
861 | } |
862 | ||
863 | if (regionWidth >= 10) { | |
864 | self.doZoom_(Math.min(dragStartX, dragEndX), | |
865 | Math.max(dragStartX, dragEndX)); | |
866 | } else { | |
867 | self.canvas_.getContext("2d").clearRect(0, 0, | |
868 | self.canvas_.width, | |
869 | self.canvas_.height); | |
870 | } | |
871 | ||
872 | dragStartX = null; | |
873 | dragStartY = null; | |
874 | } | |
bce01b0f DV |
875 | |
876 | if (isPanning) { | |
877 | isPanning = false; | |
878 | draggingDate = null; | |
879 | dateRange = null; | |
880 | } | |
6a1aa64f DV |
881 | }); |
882 | ||
883 | // Double-clicking zooms back out | |
eb7bf005 | 884 | Dygraph.addEvent(this.mouseEventElement_, 'dblclick', function(event) { |
b258a3da | 885 | if (self.dateWindow_ == null) return; |
6a1aa64f DV |
886 | self.dateWindow_ = null; |
887 | self.drawGraph_(self.rawData_); | |
888 | var minDate = self.rawData_[0][0]; | |
889 | var maxDate = self.rawData_[self.rawData_.length - 1][0]; | |
285a6bda DV |
890 | if (self.attr_("zoomCallback")) { |
891 | self.attr_("zoomCallback")(minDate, maxDate); | |
67e650dc | 892 | } |
6a1aa64f DV |
893 | }); |
894 | }; | |
895 | ||
896 | /** | |
897 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
898 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
899 | * avoid extra redrawing, but it's tricky to avoid interactions with the status | |
900 | * dots. | |
901 | * @param {Number} startX The X position where the drag started, in canvas | |
902 | * coordinates. | |
903 | * @param {Number} endX The current X position of the drag, in canvas coords. | |
904 | * @param {Number} prevEndX The value of endX on the previous call to this | |
905 | * function. Used to avoid excess redrawing | |
906 | * @private | |
907 | */ | |
285a6bda | 908 | Dygraph.prototype.drawZoomRect_ = function(startX, endX, prevEndX) { |
6a1aa64f DV |
909 | var ctx = this.canvas_.getContext("2d"); |
910 | ||
911 | // Clean up from the previous rect if necessary | |
912 | if (prevEndX) { | |
913 | ctx.clearRect(Math.min(startX, prevEndX), 0, | |
914 | Math.abs(startX - prevEndX), this.height_); | |
915 | } | |
916 | ||
917 | // Draw a light-grey rectangle to show the new viewing area | |
918 | if (endX && startX) { | |
919 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
920 | ctx.fillRect(Math.min(startX, endX), 0, | |
921 | Math.abs(endX - startX), this.height_); | |
922 | } | |
923 | }; | |
924 | ||
925 | /** | |
926 | * Zoom to something containing [lowX, highX]. These are pixel coordinates | |
927 | * in the canvas. The exact zoom window may be slightly larger if there are no | |
928 | * data points near lowX or highX. This function redraws the graph. | |
929 | * @param {Number} lowX The leftmost pixel value that should be visible. | |
930 | * @param {Number} highX The rightmost pixel value that should be visible. | |
931 | * @private | |
932 | */ | |
285a6bda | 933 | Dygraph.prototype.doZoom_ = function(lowX, highX) { |
6a1aa64f | 934 | // Find the earliest and latest dates contained in this canvasx range. |
56623f3b DV |
935 | var r = this.toDataCoords(lowX, null); |
936 | var minDate = r[0]; | |
937 | r = this.toDataCoords(highX, null); | |
938 | var maxDate = r[0]; | |
6a1aa64f DV |
939 | |
940 | this.dateWindow_ = [minDate, maxDate]; | |
941 | this.drawGraph_(this.rawData_); | |
285a6bda DV |
942 | if (this.attr_("zoomCallback")) { |
943 | this.attr_("zoomCallback")(minDate, maxDate); | |
67e650dc | 944 | } |
6a1aa64f DV |
945 | }; |
946 | ||
947 | /** | |
948 | * When the mouse moves in the canvas, display information about a nearby data | |
949 | * point and draw dots over those points in the data series. This function | |
950 | * takes care of cleanup of previously-drawn dots. | |
951 | * @param {Object} event The mousemove event from the browser. | |
952 | * @private | |
953 | */ | |
285a6bda | 954 | Dygraph.prototype.mouseMove_ = function(event) { |
eb7bf005 | 955 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_); |
6a1aa64f DV |
956 | var points = this.layout_.points; |
957 | ||
958 | var lastx = -1; | |
959 | var lasty = -1; | |
960 | ||
961 | // Loop through all the points and find the date nearest to our current | |
962 | // location. | |
963 | var minDist = 1e+100; | |
964 | var idx = -1; | |
965 | for (var i = 0; i < points.length; i++) { | |
966 | var dist = Math.abs(points[i].canvasx - canvasx); | |
f032c51d | 967 | if (dist > minDist) continue; |
6a1aa64f DV |
968 | minDist = dist; |
969 | idx = i; | |
970 | } | |
971 | if (idx >= 0) lastx = points[idx].xval; | |
972 | // Check that you can really highlight the last day's data | |
973 | if (canvasx > points[points.length-1].canvasx) | |
974 | lastx = points[points.length-1].xval; | |
975 | ||
976 | // Extract the points we've selected | |
b258a3da | 977 | this.selPoints_ = []; |
50360fd0 | 978 | var l = points.length; |
416b05ad NK |
979 | if (!this.attr_("stackedGraph")) { |
980 | for (var i = 0; i < l; i++) { | |
981 | if (points[i].xval == lastx) { | |
982 | this.selPoints_.push(points[i]); | |
983 | } | |
984 | } | |
985 | } else { | |
354e15ab DE |
986 | // Need to 'unstack' points starting from the bottom |
987 | var cumulative_sum = 0; | |
416b05ad NK |
988 | for (var i = l - 1; i >= 0; i--) { |
989 | if (points[i].xval == lastx) { | |
354e15ab | 990 | var p = {}; // Clone the point since we modify it |
d4139cd8 NK |
991 | for (var k in points[i]) { |
992 | p[k] = points[i][k]; | |
50360fd0 NK |
993 | } |
994 | p.yval -= cumulative_sum; | |
995 | cumulative_sum += p.yval; | |
d4139cd8 | 996 | this.selPoints_.push(p); |
12e4c741 | 997 | } |
6a1aa64f | 998 | } |
354e15ab | 999 | this.selPoints_.reverse(); |
6a1aa64f DV |
1000 | } |
1001 | ||
b258a3da | 1002 | if (this.attr_("highlightCallback")) { |
a4c6a67c | 1003 | var px = this.lastx_; |
dd082dda | 1004 | if (px !== null && lastx != px) { |
344ba8c0 | 1005 | // only fire if the selected point has changed. |
50360fd0 | 1006 | this.attr_("highlightCallback")(event, lastx, this.selPoints_); |
43af96e7 | 1007 | } |
12e4c741 | 1008 | } |
43af96e7 | 1009 | |
239c712d NAG |
1010 | // Save last x position for callbacks. |
1011 | this.lastx_ = lastx; | |
50360fd0 | 1012 | |
239c712d NAG |
1013 | this.updateSelection_(); |
1014 | }; | |
b258a3da | 1015 | |
239c712d NAG |
1016 | /** |
1017 | * Draw dots over the selectied points in the data series. This function | |
1018 | * takes care of cleanup of previously-drawn dots. | |
1019 | * @private | |
1020 | */ | |
1021 | Dygraph.prototype.updateSelection_ = function() { | |
6a1aa64f | 1022 | // Clear the previously drawn vertical, if there is one |
6a1aa64f DV |
1023 | var ctx = this.canvas_.getContext("2d"); |
1024 | if (this.previousVerticalX_ >= 0) { | |
46dde5f9 DV |
1025 | // Determine the maximum highlight circle size. |
1026 | var maxCircleSize = 0; | |
227b93cc DV |
1027 | var labels = this.attr_('labels'); |
1028 | for (var i = 1; i < labels.length; i++) { | |
1029 | var r = this.attr_('highlightCircleSize', labels[i]); | |
46dde5f9 DV |
1030 | if (r > maxCircleSize) maxCircleSize = r; |
1031 | } | |
6a1aa64f | 1032 | var px = this.previousVerticalX_; |
46dde5f9 DV |
1033 | ctx.clearRect(px - maxCircleSize - 1, 0, |
1034 | 2 * maxCircleSize + 2, this.height_); | |
6a1aa64f DV |
1035 | } |
1036 | ||
584ceeaa DV |
1037 | var isOK = function(x) { return x && !isNaN(x); }; |
1038 | ||
d160cc3b | 1039 | if (this.selPoints_.length > 0) { |
b258a3da | 1040 | var canvasx = this.selPoints_[0].canvasx; |
6a1aa64f DV |
1041 | |
1042 | // Set the status message to indicate the selected point(s) | |
239c712d | 1043 | var replace = this.attr_('xValueFormatter')(this.lastx_, this) + ":"; |
50360fd0 | 1044 | var fmtFunc = this.attr_('yValueFormatter'); |
6a1aa64f | 1045 | var clen = this.colors_.length; |
d160cc3b NK |
1046 | |
1047 | if (this.attr_('showLabelsOnHighlight')) { | |
1048 | // Set the status message to indicate the selected point(s) | |
d160cc3b | 1049 | for (var i = 0; i < this.selPoints_.length; i++) { |
129569a5 | 1050 | if (!this.attr_("labelsShowZeroValues") && this.selPoints_[i].yval == 0) continue; |
d160cc3b NK |
1051 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
1052 | if (this.attr_("labelsSeparateLines")) { | |
1053 | replace += "<br/>"; | |
1054 | } | |
1055 | var point = this.selPoints_[i]; | |
8fb6dc24 | 1056 | var c = new RGBColor(this.plotter_.colors[point.name]); |
029da4b6 | 1057 | var yval = fmtFunc(point.yval); |
d160cc3b NK |
1058 | replace += " <b><font color='" + c.toHex() + "'>" |
1059 | + point.name + "</font></b>:" | |
1060 | + yval; | |
6a1aa64f | 1061 | } |
50360fd0 | 1062 | |
d160cc3b | 1063 | this.attr_("labelsDiv").innerHTML = replace; |
6a1aa64f | 1064 | } |
6a1aa64f | 1065 | |
6a1aa64f | 1066 | // Draw colored circles over the center of each selected point |
43af96e7 | 1067 | ctx.save(); |
b258a3da | 1068 | for (var i = 0; i < this.selPoints_.length; i++) { |
f032c51d | 1069 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
227b93cc DV |
1070 | var circleSize = |
1071 | this.attr_('highlightCircleSize', this.selPoints_[i].name); | |
6a1aa64f | 1072 | ctx.beginPath(); |
563c70ca | 1073 | ctx.fillStyle = this.plotter_.colors[this.selPoints_[i].name]; |
f032c51d | 1074 | ctx.arc(canvasx, this.selPoints_[i].canvasy, circleSize, |
7bf6a9fe | 1075 | 0, 2 * Math.PI, false); |
6a1aa64f DV |
1076 | ctx.fill(); |
1077 | } | |
1078 | ctx.restore(); | |
1079 | ||
1080 | this.previousVerticalX_ = canvasx; | |
1081 | } | |
1082 | }; | |
1083 | ||
1084 | /** | |
239c712d NAG |
1085 | * Set manually set selected dots, and display information about them |
1086 | * @param int row number that should by highlighted | |
1087 | * false value clears the selection | |
1088 | * @public | |
1089 | */ | |
1090 | Dygraph.prototype.setSelection = function(row) { | |
1091 | // Extract the points we've selected | |
1092 | this.selPoints_ = []; | |
1093 | var pos = 0; | |
50360fd0 | 1094 | |
239c712d | 1095 | if (row !== false) { |
16269f6e NAG |
1096 | row = row-this.boundaryIds_[0][0]; |
1097 | } | |
50360fd0 | 1098 | |
16269f6e | 1099 | if (row !== false && row >= 0) { |
239c712d | 1100 | for (var i in this.layout_.datasets) { |
16269f6e | 1101 | if (row < this.layout_.datasets[i].length) { |
38f33a44 | 1102 | var point = this.layout_.points[pos+row]; |
1103 | ||
1104 | if (this.attr_("stackedGraph")) { | |
8c03ba63 | 1105 | point = this.layout_.unstackPointAtIndex(pos+row); |
38f33a44 | 1106 | } |
1107 | ||
1108 | this.selPoints_.push(point); | |
16269f6e | 1109 | } |
239c712d NAG |
1110 | pos += this.layout_.datasets[i].length; |
1111 | } | |
16269f6e | 1112 | } |
50360fd0 | 1113 | |
16269f6e | 1114 | if (this.selPoints_.length) { |
239c712d NAG |
1115 | this.lastx_ = this.selPoints_[0].xval; |
1116 | this.updateSelection_(); | |
1117 | } else { | |
1118 | this.lastx_ = -1; | |
1119 | this.clearSelection(); | |
1120 | } | |
1121 | ||
1122 | }; | |
1123 | ||
1124 | /** | |
6a1aa64f DV |
1125 | * The mouse has left the canvas. Clear out whatever artifacts remain |
1126 | * @param {Object} event the mouseout event from the browser. | |
1127 | * @private | |
1128 | */ | |
285a6bda | 1129 | Dygraph.prototype.mouseOut_ = function(event) { |
a4c6a67c AV |
1130 | if (this.attr_("unhighlightCallback")) { |
1131 | this.attr_("unhighlightCallback")(event); | |
1132 | } | |
1133 | ||
43af96e7 | 1134 | if (this.attr_("hideOverlayOnMouseOut")) { |
239c712d | 1135 | this.clearSelection(); |
43af96e7 | 1136 | } |
6a1aa64f DV |
1137 | }; |
1138 | ||
239c712d NAG |
1139 | /** |
1140 | * Remove all selection from the canvas | |
1141 | * @public | |
1142 | */ | |
1143 | Dygraph.prototype.clearSelection = function() { | |
1144 | // Get rid of the overlay data | |
1145 | var ctx = this.canvas_.getContext("2d"); | |
1146 | ctx.clearRect(0, 0, this.width_, this.height_); | |
1147 | this.attr_("labelsDiv").innerHTML = ""; | |
1148 | this.selPoints_ = []; | |
1149 | this.lastx_ = -1; | |
1150 | } | |
1151 | ||
103b7292 NAG |
1152 | /** |
1153 | * Returns the number of the currently selected row | |
1154 | * @return int row number, of -1 if nothing is selected | |
1155 | * @public | |
1156 | */ | |
1157 | Dygraph.prototype.getSelection = function() { | |
1158 | if (!this.selPoints_ || this.selPoints_.length < 1) { | |
1159 | return -1; | |
1160 | } | |
50360fd0 | 1161 | |
103b7292 NAG |
1162 | for (var row=0; row<this.layout_.points.length; row++ ) { |
1163 | if (this.layout_.points[row].x == this.selPoints_[0].x) { | |
16269f6e | 1164 | return row + this.boundaryIds_[0][0]; |
103b7292 NAG |
1165 | } |
1166 | } | |
1167 | return -1; | |
1168 | } | |
1169 | ||
285a6bda | 1170 | Dygraph.zeropad = function(x) { |
32988383 DV |
1171 | if (x < 10) return "0" + x; else return "" + x; |
1172 | } | |
1173 | ||
6a1aa64f | 1174 | /** |
6b8e33dd DV |
1175 | * Return a string version of the hours, minutes and seconds portion of a date. |
1176 | * @param {Number} date The JavaScript date (ms since epoch) | |
1177 | * @return {String} A time of the form "HH:MM:SS" | |
1178 | * @private | |
1179 | */ | |
bf640e56 | 1180 | Dygraph.hmsString_ = function(date) { |
285a6bda | 1181 | var zeropad = Dygraph.zeropad; |
6b8e33dd DV |
1182 | var d = new Date(date); |
1183 | if (d.getSeconds()) { | |
1184 | return zeropad(d.getHours()) + ":" + | |
1185 | zeropad(d.getMinutes()) + ":" + | |
1186 | zeropad(d.getSeconds()); | |
6b8e33dd | 1187 | } else { |
054531ca | 1188 | return zeropad(d.getHours()) + ":" + zeropad(d.getMinutes()); |
6b8e33dd DV |
1189 | } |
1190 | } | |
1191 | ||
1192 | /** | |
bf640e56 AV |
1193 | * Convert a JS date to a string appropriate to display on an axis that |
1194 | * is displaying values at the stated granularity. | |
1195 | * @param {Date} date The date to format | |
1196 | * @param {Number} granularity One of the Dygraph granularity constants | |
1197 | * @return {String} The formatted date | |
1198 | * @private | |
1199 | */ | |
1200 | Dygraph.dateAxisFormatter = function(date, granularity) { | |
1201 | if (granularity >= Dygraph.MONTHLY) { | |
1202 | return date.strftime('%b %y'); | |
1203 | } else { | |
31eddad3 | 1204 | var frac = date.getHours() * 3600 + date.getMinutes() * 60 + date.getSeconds() + date.getMilliseconds(); |
bf640e56 AV |
1205 | if (frac == 0 || granularity >= Dygraph.DAILY) { |
1206 | return new Date(date.getTime() + 3600*1000).strftime('%d%b'); | |
1207 | } else { | |
1208 | return Dygraph.hmsString_(date.getTime()); | |
1209 | } | |
1210 | } | |
1211 | } | |
1212 | ||
1213 | /** | |
6a1aa64f DV |
1214 | * Convert a JS date (millis since epoch) to YYYY/MM/DD |
1215 | * @param {Number} date The JavaScript date (ms since epoch) | |
1216 | * @return {String} A date of the form "YYYY/MM/DD" | |
1217 | * @private | |
1218 | */ | |
285a6bda DV |
1219 | Dygraph.dateString_ = function(date, self) { |
1220 | var zeropad = Dygraph.zeropad; | |
6a1aa64f DV |
1221 | var d = new Date(date); |
1222 | ||
1223 | // Get the year: | |
1224 | var year = "" + d.getFullYear(); | |
1225 | // Get a 0 padded month string | |
6b8e33dd | 1226 | var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh |
6a1aa64f | 1227 | // Get a 0 padded day string |
6b8e33dd | 1228 | var day = zeropad(d.getDate()); |
6a1aa64f | 1229 | |
6b8e33dd DV |
1230 | var ret = ""; |
1231 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); | |
bf640e56 | 1232 | if (frac) ret = " " + Dygraph.hmsString_(date); |
6b8e33dd DV |
1233 | |
1234 | return year + "/" + month + "/" + day + ret; | |
6a1aa64f DV |
1235 | }; |
1236 | ||
1237 | /** | |
1238 | * Round a number to the specified number of digits past the decimal point. | |
1239 | * @param {Number} num The number to round | |
1240 | * @param {Number} places The number of decimals to which to round | |
1241 | * @return {Number} The rounded number | |
1242 | * @private | |
1243 | */ | |
029da4b6 | 1244 | Dygraph.round_ = function(num, places) { |
6a1aa64f DV |
1245 | var shift = Math.pow(10, places); |
1246 | return Math.round(num * shift)/shift; | |
1247 | }; | |
1248 | ||
1249 | /** | |
1250 | * Fires when there's data available to be graphed. | |
1251 | * @param {String} data Raw CSV data to be plotted | |
1252 | * @private | |
1253 | */ | |
285a6bda | 1254 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f DV |
1255 | this.rawData_ = this.parseCSV_(data); |
1256 | this.drawGraph_(this.rawData_); | |
1257 | }; | |
1258 | ||
285a6bda | 1259 | Dygraph.prototype.months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", |
8846615a | 1260 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]; |
285a6bda | 1261 | Dygraph.prototype.quarters = ["Jan", "Apr", "Jul", "Oct"]; |
6a1aa64f DV |
1262 | |
1263 | /** | |
1264 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
1265 | * @private | |
1266 | */ | |
285a6bda | 1267 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f DV |
1268 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
1269 | var startDate, endDate; | |
1270 | if (this.dateWindow_) { | |
1271 | startDate = this.dateWindow_[0]; | |
1272 | endDate = this.dateWindow_[1]; | |
1273 | } else { | |
1274 | startDate = this.rawData_[0][0]; | |
1275 | endDate = this.rawData_[this.rawData_.length - 1][0]; | |
1276 | } | |
1277 | ||
285a6bda | 1278 | var xTicks = this.attr_('xTicker')(startDate, endDate, this); |
6a1aa64f | 1279 | this.layout_.updateOptions({xTicks: xTicks}); |
32988383 DV |
1280 | }; |
1281 | ||
1282 | // Time granularity enumeration | |
285a6bda | 1283 | Dygraph.SECONDLY = 0; |
20a41c17 DV |
1284 | Dygraph.TWO_SECONDLY = 1; |
1285 | Dygraph.FIVE_SECONDLY = 2; | |
1286 | Dygraph.TEN_SECONDLY = 3; | |
1287 | Dygraph.THIRTY_SECONDLY = 4; | |
1288 | Dygraph.MINUTELY = 5; | |
1289 | Dygraph.TWO_MINUTELY = 6; | |
1290 | Dygraph.FIVE_MINUTELY = 7; | |
1291 | Dygraph.TEN_MINUTELY = 8; | |
1292 | Dygraph.THIRTY_MINUTELY = 9; | |
1293 | Dygraph.HOURLY = 10; | |
1294 | Dygraph.TWO_HOURLY = 11; | |
1295 | Dygraph.SIX_HOURLY = 12; | |
1296 | Dygraph.DAILY = 13; | |
1297 | Dygraph.WEEKLY = 14; | |
1298 | Dygraph.MONTHLY = 15; | |
1299 | Dygraph.QUARTERLY = 16; | |
1300 | Dygraph.BIANNUAL = 17; | |
1301 | Dygraph.ANNUAL = 18; | |
1302 | Dygraph.DECADAL = 19; | |
1303 | Dygraph.NUM_GRANULARITIES = 20; | |
285a6bda DV |
1304 | |
1305 | Dygraph.SHORT_SPACINGS = []; | |
1306 | Dygraph.SHORT_SPACINGS[Dygraph.SECONDLY] = 1000 * 1; | |
20a41c17 DV |
1307 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_SECONDLY] = 1000 * 2; |
1308 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_SECONDLY] = 1000 * 5; | |
285a6bda DV |
1309 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_SECONDLY] = 1000 * 10; |
1310 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_SECONDLY] = 1000 * 30; | |
1311 | Dygraph.SHORT_SPACINGS[Dygraph.MINUTELY] = 1000 * 60; | |
20a41c17 DV |
1312 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_MINUTELY] = 1000 * 60 * 2; |
1313 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_MINUTELY] = 1000 * 60 * 5; | |
285a6bda DV |
1314 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_MINUTELY] = 1000 * 60 * 10; |
1315 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_MINUTELY] = 1000 * 60 * 30; | |
1316 | Dygraph.SHORT_SPACINGS[Dygraph.HOURLY] = 1000 * 3600; | |
20a41c17 | 1317 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_HOURLY] = 1000 * 3600 * 2; |
805d5519 | 1318 | Dygraph.SHORT_SPACINGS[Dygraph.SIX_HOURLY] = 1000 * 3600 * 6; |
285a6bda DV |
1319 | Dygraph.SHORT_SPACINGS[Dygraph.DAILY] = 1000 * 86400; |
1320 | Dygraph.SHORT_SPACINGS[Dygraph.WEEKLY] = 1000 * 604800; | |
32988383 DV |
1321 | |
1322 | // NumXTicks() | |
1323 | // | |
1324 | // If we used this time granularity, how many ticks would there be? | |
1325 | // This is only an approximation, but it's generally good enough. | |
1326 | // | |
285a6bda DV |
1327 | Dygraph.prototype.NumXTicks = function(start_time, end_time, granularity) { |
1328 | if (granularity < Dygraph.MONTHLY) { | |
32988383 | 1329 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1330 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
32988383 DV |
1331 | return Math.floor(0.5 + 1.0 * (end_time - start_time) / spacing); |
1332 | } else { | |
1333 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1334 | var num_months = 12; | |
285a6bda DV |
1335 | if (granularity == Dygraph.QUARTERLY) num_months = 3; |
1336 | if (granularity == Dygraph.BIANNUAL) num_months = 2; | |
1337 | if (granularity == Dygraph.ANNUAL) num_months = 1; | |
1338 | if (granularity == Dygraph.DECADAL) { num_months = 1; year_mod = 10; } | |
32988383 DV |
1339 | |
1340 | var msInYear = 365.2524 * 24 * 3600 * 1000; | |
1341 | var num_years = 1.0 * (end_time - start_time) / msInYear; | |
1342 | return Math.floor(0.5 + 1.0 * num_years * num_months / year_mod); | |
1343 | } | |
1344 | }; | |
1345 | ||
1346 | // GetXAxis() | |
1347 | // | |
1348 | // Construct an x-axis of nicely-formatted times on meaningful boundaries | |
1349 | // (e.g. 'Jan 09' rather than 'Jan 22, 2009'). | |
1350 | // | |
1351 | // Returns an array containing {v: millis, label: label} dictionaries. | |
1352 | // | |
285a6bda | 1353 | Dygraph.prototype.GetXAxis = function(start_time, end_time, granularity) { |
bf640e56 | 1354 | var formatter = this.attr_("xAxisLabelFormatter"); |
32988383 | 1355 | var ticks = []; |
285a6bda | 1356 | if (granularity < Dygraph.MONTHLY) { |
32988383 | 1357 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1358 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
3d29302c | 1359 | var format = '%d%b'; // e.g. "1Jan" |
076c9622 DV |
1360 | |
1361 | // Find a time less than start_time which occurs on a "nice" time boundary | |
1362 | // for this granularity. | |
1363 | var g = spacing / 1000; | |
076c9622 DV |
1364 | var d = new Date(start_time); |
1365 | if (g <= 60) { // seconds | |
1366 | var x = d.getSeconds(); d.setSeconds(x - x % g); | |
1367 | } else { | |
1368 | d.setSeconds(0); | |
1369 | g /= 60; | |
1370 | if (g <= 60) { // minutes | |
1371 | var x = d.getMinutes(); d.setMinutes(x - x % g); | |
1372 | } else { | |
1373 | d.setMinutes(0); | |
1374 | g /= 60; | |
1375 | ||
1376 | if (g <= 24) { // days | |
1377 | var x = d.getHours(); d.setHours(x - x % g); | |
1378 | } else { | |
1379 | d.setHours(0); | |
1380 | g /= 24; | |
1381 | ||
1382 | if (g == 7) { // one week | |
20a41c17 | 1383 | d.setDate(d.getDate() - d.getDay()); |
076c9622 DV |
1384 | } |
1385 | } | |
1386 | } | |
328bb812 | 1387 | } |
076c9622 DV |
1388 | start_time = d.getTime(); |
1389 | ||
32988383 | 1390 | for (var t = start_time; t <= end_time; t += spacing) { |
bf640e56 | 1391 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1392 | } |
1393 | } else { | |
1394 | // Display a tick mark on the first of a set of months of each year. | |
1395 | // Years get a tick mark iff y % year_mod == 0. This is useful for | |
1396 | // displaying a tick mark once every 10 years, say, on long time scales. | |
1397 | var months; | |
1398 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1399 | ||
285a6bda | 1400 | if (granularity == Dygraph.MONTHLY) { |
32988383 | 1401 | months = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ]; |
285a6bda | 1402 | } else if (granularity == Dygraph.QUARTERLY) { |
32988383 | 1403 | months = [ 0, 3, 6, 9 ]; |
285a6bda | 1404 | } else if (granularity == Dygraph.BIANNUAL) { |
32988383 | 1405 | months = [ 0, 6 ]; |
285a6bda | 1406 | } else if (granularity == Dygraph.ANNUAL) { |
32988383 | 1407 | months = [ 0 ]; |
285a6bda | 1408 | } else if (granularity == Dygraph.DECADAL) { |
32988383 DV |
1409 | months = [ 0 ]; |
1410 | year_mod = 10; | |
1411 | } | |
1412 | ||
1413 | var start_year = new Date(start_time).getFullYear(); | |
1414 | var end_year = new Date(end_time).getFullYear(); | |
285a6bda | 1415 | var zeropad = Dygraph.zeropad; |
32988383 DV |
1416 | for (var i = start_year; i <= end_year; i++) { |
1417 | if (i % year_mod != 0) continue; | |
1418 | for (var j = 0; j < months.length; j++) { | |
1419 | var date_str = i + "/" + zeropad(1 + months[j]) + "/01"; | |
1420 | var t = Date.parse(date_str); | |
1421 | if (t < start_time || t > end_time) continue; | |
bf640e56 | 1422 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1423 | } |
1424 | } | |
1425 | } | |
1426 | ||
1427 | return ticks; | |
1428 | }; | |
1429 | ||
6a1aa64f DV |
1430 | |
1431 | /** | |
1432 | * Add ticks to the x-axis based on a date range. | |
1433 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1434 | * @param {Number} endDate End of the date window (millis since epoch) | |
1435 | * @return {Array.<Object>} Array of {label, value} tuples. | |
1436 | * @public | |
1437 | */ | |
285a6bda | 1438 | Dygraph.dateTicker = function(startDate, endDate, self) { |
32988383 | 1439 | var chosen = -1; |
285a6bda DV |
1440 | for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) { |
1441 | var num_ticks = self.NumXTicks(startDate, endDate, i); | |
1442 | if (self.width_ / num_ticks >= self.attr_('pixelsPerXLabel')) { | |
32988383 DV |
1443 | chosen = i; |
1444 | break; | |
2769de62 | 1445 | } |
6a1aa64f DV |
1446 | } |
1447 | ||
32988383 | 1448 | if (chosen >= 0) { |
285a6bda | 1449 | return self.GetXAxis(startDate, endDate, chosen); |
6a1aa64f | 1450 | } else { |
32988383 | 1451 | // TODO(danvk): signal error. |
6a1aa64f | 1452 | } |
6a1aa64f DV |
1453 | }; |
1454 | ||
1455 | /** | |
1456 | * Add ticks when the x axis has numbers on it (instead of dates) | |
1457 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1458 | * @param {Number} endDate End of the date window (millis since epoch) | |
84fc6aa7 | 1459 | * @param self |
f30cf740 | 1460 | * @param {function} attribute accessor function. |
6a1aa64f DV |
1461 | * @return {Array.<Object>} Array of {label, value} tuples. |
1462 | * @public | |
1463 | */ | |
f09fc545 DV |
1464 | Dygraph.numericTicks = function(minV, maxV, self, attr) { |
1465 | // This is a bit of a hack to allow per-axis attributes. | |
1466 | if (!attr) attr = self.attr_; | |
1467 | ||
c6336f04 DV |
1468 | // Basic idea: |
1469 | // Try labels every 1, 2, 5, 10, 20, 50, 100, etc. | |
1470 | // Calculate the resulting tick spacing (i.e. this.height_ / nTicks). | |
285a6bda | 1471 | // The first spacing greater than pixelsPerYLabel is what we use. |
ff00d3e2 | 1472 | // TODO(danvk): version that works on a log scale. |
f09fc545 | 1473 | if (attr("labelsKMG2")) { |
f09e46d4 DV |
1474 | var mults = [1, 2, 4, 8]; |
1475 | } else { | |
1476 | var mults = [1, 2, 5]; | |
1477 | } | |
c6336f04 | 1478 | var scale, low_val, high_val, nTicks; |
285a6bda | 1479 | // TODO(danvk): make it possible to set this for x- and y-axes independently. |
f09fc545 | 1480 | var pixelsPerTick = attr('pixelsPerYLabel'); |
c6336f04 | 1481 | for (var i = -10; i < 50; i++) { |
f09fc545 | 1482 | if (attr("labelsKMG2")) { |
f09e46d4 DV |
1483 | var base_scale = Math.pow(16, i); |
1484 | } else { | |
1485 | var base_scale = Math.pow(10, i); | |
1486 | } | |
c6336f04 DV |
1487 | for (var j = 0; j < mults.length; j++) { |
1488 | scale = base_scale * mults[j]; | |
c6336f04 DV |
1489 | low_val = Math.floor(minV / scale) * scale; |
1490 | high_val = Math.ceil(maxV / scale) * scale; | |
48a0ac91 | 1491 | nTicks = Math.abs(high_val - low_val) / scale; |
285a6bda | 1492 | var spacing = self.height_ / nTicks; |
c6336f04 | 1493 | // wish I could break out of both loops at once... |
285a6bda | 1494 | if (spacing > pixelsPerTick) break; |
c6336f04 | 1495 | } |
285a6bda | 1496 | if (spacing > pixelsPerTick) break; |
6a1aa64f DV |
1497 | } |
1498 | ||
1499 | // Construct labels for the ticks | |
1500 | var ticks = []; | |
ed11be50 DV |
1501 | var k; |
1502 | var k_labels = []; | |
f09fc545 | 1503 | if (attr("labelsKMB")) { |
ed11be50 DV |
1504 | k = 1000; |
1505 | k_labels = [ "K", "M", "B", "T" ]; | |
1506 | } | |
f09fc545 | 1507 | if (attr("labelsKMG2")) { |
ed11be50 DV |
1508 | if (k) self.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); |
1509 | k = 1024; | |
1510 | k_labels = [ "k", "M", "G", "T" ]; | |
1511 | } | |
c94eee24 | 1512 | var formatter = attr('yAxisLabelFormatter') ? attr('yAxisLabelFormatter') : attr('yValueFormatter'); |
ed11be50 | 1513 | |
e21e69e2 | 1514 | // Allow reverse y-axis if it's explicitly requested. |
be7cdb11 | 1515 | if (low_val > high_val) scale *= -1; |
48a0ac91 | 1516 | |
c6336f04 DV |
1517 | for (var i = 0; i < nTicks; i++) { |
1518 | var tickV = low_val + i * scale; | |
0af6e346 | 1519 | var absTickV = Math.abs(tickV); |
84fc6aa7 NN |
1520 | var label; |
1521 | if (formatter != undefined) { | |
1522 | label = formatter(tickV); | |
1523 | } else { | |
1524 | label = Dygraph.round_(tickV, 2); | |
1525 | } | |
ed11be50 DV |
1526 | if (k_labels.length) { |
1527 | // Round up to an appropriate unit. | |
1528 | var n = k*k*k*k; | |
1529 | for (var j = 3; j >= 0; j--, n /= k) { | |
1530 | if (absTickV >= n) { | |
029da4b6 | 1531 | label = Dygraph.round_(tickV / n, 1) + k_labels[j]; |
ed11be50 DV |
1532 | break; |
1533 | } | |
afefbcdb | 1534 | } |
6a1aa64f DV |
1535 | } |
1536 | ticks.push( {label: label, v: tickV} ); | |
1537 | } | |
1538 | return ticks; | |
1539 | }; | |
1540 | ||
1541 | /** | |
1542 | * Adds appropriate ticks on the y-axis | |
1543 | * @param {Number} minY The minimum Y value in the data set | |
1544 | * @param {Number} maxY The maximum Y value in the data set | |
1545 | * @private | |
1546 | */ | |
285a6bda | 1547 | Dygraph.prototype.addYTicks_ = function(minY, maxY) { |
6a1aa64f | 1548 | // Set the number of ticks so that the labels are human-friendly. |
285a6bda | 1549 | // TODO(danvk): make this an attribute as well. |
84fc6aa7 NN |
1550 | var formatter = this.attr_('yAxisLabelFormatter') ? this.attr_('yAxisLabelFormatter') : this.attr_('yValueFormatter'); |
1551 | var ticks = Dygraph.numericTicks(minY, maxY, this, formatter); | |
6a1aa64f DV |
1552 | this.layout_.updateOptions( { yAxis: [minY, maxY], |
1553 | yTicks: ticks } ); | |
1554 | }; | |
1555 | ||
5011e7a1 DV |
1556 | // Computes the range of the data series (including confidence intervals). |
1557 | // series is either [ [x1, y1], [x2, y2], ... ] or | |
1558 | // [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... | |
1559 | // Returns [low, high] | |
1560 | Dygraph.prototype.extremeValues_ = function(series) { | |
1561 | var minY = null, maxY = null; | |
1562 | ||
9922b78b | 1563 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
5011e7a1 DV |
1564 | if (bars) { |
1565 | // With custom bars, maxY is the max of the high values. | |
1566 | for (var j = 0; j < series.length; j++) { | |
1567 | var y = series[j][1][0]; | |
1568 | if (!y) continue; | |
1569 | var low = y - series[j][1][1]; | |
1570 | var high = y + series[j][1][2]; | |
1571 | if (low > y) low = y; // this can happen with custom bars, | |
1572 | if (high < y) high = y; // e.g. in tests/custom-bars.html | |
1573 | if (maxY == null || high > maxY) { | |
1574 | maxY = high; | |
1575 | } | |
1576 | if (minY == null || low < minY) { | |
1577 | minY = low; | |
1578 | } | |
1579 | } | |
1580 | } else { | |
1581 | for (var j = 0; j < series.length; j++) { | |
1582 | var y = series[j][1]; | |
d12999d3 | 1583 | if (y === null || isNaN(y)) continue; |
5011e7a1 DV |
1584 | if (maxY == null || y > maxY) { |
1585 | maxY = y; | |
1586 | } | |
1587 | if (minY == null || y < minY) { | |
1588 | minY = y; | |
1589 | } | |
1590 | } | |
1591 | } | |
1592 | ||
1593 | return [minY, maxY]; | |
1594 | }; | |
1595 | ||
6a1aa64f DV |
1596 | /** |
1597 | * Update the graph with new data. Data is in the format | |
1598 | * [ [date1, val1, val2, ...], [date2, val1, val2, ...] if errorBars=false | |
1599 | * or, if errorBars=true, | |
1600 | * [ [date1, [val1,stddev1], [val2,stddev2], ...], [date2, ...], ...] | |
1601 | * @param {Array.<Object>} data The data (see above) | |
1602 | * @private | |
1603 | */ | |
285a6bda | 1604 | Dygraph.prototype.drawGraph_ = function(data) { |
fe0b7c03 DV |
1605 | // This is used to set the second parameter to drawCallback, below. |
1606 | var is_initial_draw = this.is_initial_draw_; | |
1607 | this.is_initial_draw_ = false; | |
1608 | ||
3bd9c228 | 1609 | var minY = null, maxY = null; |
6a1aa64f | 1610 | this.layout_.removeAllDatasets(); |
285a6bda | 1611 | this.setColors_(); |
9317362d | 1612 | this.attrs_['pointSize'] = 0.5 * this.attr_('highlightCircleSize'); |
285a6bda | 1613 | |
354e15ab DE |
1614 | // Loop over the fields (series). Go from the last to the first, |
1615 | // because if they're stacked that's how we accumulate the values. | |
43af96e7 | 1616 | |
354e15ab DE |
1617 | var cumulative_y = []; // For stacked series. |
1618 | var datasets = []; | |
1619 | ||
f09fc545 DV |
1620 | var extremes = {}; // series name -> [low, high] |
1621 | ||
354e15ab DE |
1622 | // Loop over all fields and create datasets |
1623 | for (var i = data[0].length - 1; i >= 1; i--) { | |
1cf11047 DV |
1624 | if (!this.visibility()[i - 1]) continue; |
1625 | ||
f09fc545 | 1626 | var seriesName = this.attr_("labels")[i]; |
450fe64b DV |
1627 | var connectSeparatedPoints = this.attr_('connectSeparatedPoints', i); |
1628 | ||
6a1aa64f DV |
1629 | var series = []; |
1630 | for (var j = 0; j < data.length; j++) { | |
4a634fc7 | 1631 | if (data[j][i] != null || !connectSeparatedPoints) { |
f032c51d | 1632 | var date = data[j][0]; |
563c70ca | 1633 | series.push([date, data[j][i]]); |
f032c51d | 1634 | } |
6a1aa64f DV |
1635 | } |
1636 | series = this.rollingAverage(series, this.rollPeriod_); | |
1637 | ||
1638 | // Prune down to the desired range, if necessary (for zooming) | |
1a26f3fb DV |
1639 | // Because there can be lines going to points outside of the visible area, |
1640 | // we actually prune to visible points, plus one on either side. | |
9922b78b | 1641 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
6a1aa64f DV |
1642 | if (this.dateWindow_) { |
1643 | var low = this.dateWindow_[0]; | |
1644 | var high= this.dateWindow_[1]; | |
1645 | var pruned = []; | |
1a26f3fb DV |
1646 | // TODO(danvk): do binary search instead of linear search. |
1647 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. | |
1648 | var firstIdx = null, lastIdx = null; | |
6a1aa64f | 1649 | for (var k = 0; k < series.length; k++) { |
1a26f3fb DV |
1650 | if (series[k][0] >= low && firstIdx === null) { |
1651 | firstIdx = k; | |
1652 | } | |
1653 | if (series[k][0] <= high) { | |
1654 | lastIdx = k; | |
6a1aa64f DV |
1655 | } |
1656 | } | |
1a26f3fb DV |
1657 | if (firstIdx === null) firstIdx = 0; |
1658 | if (firstIdx > 0) firstIdx--; | |
1659 | if (lastIdx === null) lastIdx = series.length - 1; | |
1660 | if (lastIdx < series.length - 1) lastIdx++; | |
16269f6e | 1661 | this.boundaryIds_[i-1] = [firstIdx, lastIdx]; |
1a26f3fb DV |
1662 | for (var k = firstIdx; k <= lastIdx; k++) { |
1663 | pruned.push(series[k]); | |
6a1aa64f DV |
1664 | } |
1665 | series = pruned; | |
16269f6e NAG |
1666 | } else { |
1667 | this.boundaryIds_[i-1] = [0, series.length-1]; | |
6a1aa64f DV |
1668 | } |
1669 | ||
f09fc545 DV |
1670 | var seriesExtremes = this.extremeValues_(series); |
1671 | extremes[seriesName] = seriesExtremes; | |
1672 | var thisMinY = seriesExtremes[0]; | |
1673 | var thisMaxY = seriesExtremes[1]; | |
af4cad8b NN |
1674 | if (minY === null || (thisMinY != null && thisMinY < minY)) minY = thisMinY; |
1675 | if (maxY === null || (thisMaxY != null && thisMaxY > maxY)) maxY = thisMaxY; | |
5011e7a1 | 1676 | |
6a1aa64f | 1677 | if (bars) { |
354e15ab DE |
1678 | for (var j=0; j<series.length; j++) { |
1679 | val = [series[j][0], series[j][1][0], series[j][1][1], series[j][1][2]]; | |
1680 | series[j] = val; | |
1681 | } | |
43af96e7 | 1682 | } else if (this.attr_("stackedGraph")) { |
43af96e7 NK |
1683 | var l = series.length; |
1684 | var actual_y; | |
1685 | for (var j = 0; j < l; j++) { | |
354e15ab DE |
1686 | // If one data set has a NaN, let all subsequent stacked |
1687 | // sets inherit the NaN -- only start at 0 for the first set. | |
1688 | var x = series[j][0]; | |
1689 | if (cumulative_y[x] === undefined) | |
1690 | cumulative_y[x] = 0; | |
43af96e7 NK |
1691 | |
1692 | actual_y = series[j][1]; | |
354e15ab | 1693 | cumulative_y[x] += actual_y; |
43af96e7 | 1694 | |
354e15ab | 1695 | series[j] = [x, cumulative_y[x]] |
43af96e7 | 1696 | |
354e15ab DE |
1697 | if (!maxY || cumulative_y[x] > maxY) |
1698 | maxY = cumulative_y[x]; | |
43af96e7 | 1699 | } |
6a1aa64f | 1700 | } |
354e15ab DE |
1701 | |
1702 | datasets[i] = series; | |
6a1aa64f DV |
1703 | } |
1704 | ||
354e15ab | 1705 | for (var i = 1; i < datasets.length; i++) { |
4523c1f6 | 1706 | if (!this.visibility()[i - 1]) continue; |
354e15ab | 1707 | this.layout_.addDataset(this.attr_("labels")[i], datasets[i]); |
43af96e7 NK |
1708 | } |
1709 | ||
f09fc545 DV |
1710 | var out = this.computeYaxes_(extremes); |
1711 | var axes = out[0]; | |
1712 | var seriesToAxisMap = out[1]; | |
1713 | this.displayedYRange_ = axes[0].valueRange; | |
9012dd21 | 1714 | this.layout_.updateOptions( { yAxes: axes, |
ea4942ed | 1715 | seriesToAxisMap: seriesToAxisMap |
9012dd21 | 1716 | } ); |
f09fc545 | 1717 | |
6a1aa64f DV |
1718 | this.addXTicks_(); |
1719 | ||
1720 | // Tell PlotKit to use this new data and render itself | |
d033ae1c | 1721 | this.layout_.updateOptions({dateWindow: this.dateWindow_}); |
6a1aa64f DV |
1722 | this.layout_.evaluateWithError(); |
1723 | this.plotter_.clear(); | |
1724 | this.plotter_.render(); | |
f6401bf6 DV |
1725 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
1726 | this.canvas_.height); | |
599fb4ad DV |
1727 | |
1728 | if (this.attr_("drawCallback") !== null) { | |
fe0b7c03 | 1729 | this.attr_("drawCallback")(this, is_initial_draw); |
599fb4ad | 1730 | } |
6a1aa64f DV |
1731 | }; |
1732 | ||
1733 | /** | |
b1ec0060 DV |
1734 | * Determine properties of the y axes. These include the number of axes and |
1735 | * data series/styles associated with each. This does not compute the range of | |
1736 | * each axis, since that can only be determined when drawing. | |
f09fc545 | 1737 | * Returns [ axes, seriesToAxisMap ] |
9012dd21 | 1738 | * axes = [ { options } ] |
f09fc545 DV |
1739 | * seriesToAxisMap = { seriesName: 0, seriesName2: 1, ... } |
1740 | * indices are into the axes array. | |
1741 | */ | |
1742 | Dygraph.prototype.computeYaxes_ = function(extremes) { | |
1743 | var axes = [{}]; // always have at least one y-axis. | |
1744 | var seriesToAxisMap = {}; | |
1745 | var seriesForAxis = [[]]; | |
1746 | ||
1747 | // all options which could be applied per-axis: | |
1748 | var axisOptions = [ | |
1749 | 'includeZero', | |
1750 | 'valueRange', | |
1751 | 'labelsKMB', | |
1752 | 'labelsKMG2', | |
1753 | 'pixelsPerYLabel', | |
1754 | 'yAxisLabelWidth', | |
1755 | 'axisLabelFontSize', | |
1756 | 'axisTickSize' | |
1757 | ]; | |
1758 | ||
1759 | // Copy global axis options over to the first axis. | |
1760 | for (var i = 0; i < axisOptions.length; i++) { | |
1761 | var k = axisOptions[i]; | |
1762 | var v = this.attr_(k); | |
1763 | if (v) axes[0][k] = v; | |
1764 | } | |
1765 | ||
1766 | // Go through once and add all the axes. | |
1767 | for (var seriesName in extremes) { | |
1768 | if (!extremes.hasOwnProperty(seriesName)) continue; | |
1769 | var axis = this.attr_("axis", seriesName); | |
1770 | if (axis == null) { | |
1771 | seriesToAxisMap[seriesName] = 0; | |
1772 | seriesForAxis[0].push(seriesName); | |
1773 | continue; | |
1774 | } | |
1775 | if (typeof(axis) == 'object') { | |
1776 | // Add a new axis, making a copy of its per-axis options. | |
1777 | var opts = {}; | |
1778 | Dygraph.update(opts, axes[0]); | |
1779 | Dygraph.update(opts, { valueRange: null }); // shouldn't inherit this. | |
1780 | Dygraph.update(opts, axis); | |
1781 | axes.push(opts); | |
1782 | seriesToAxisMap[seriesName] = axes.length - 1; | |
1783 | seriesForAxis.push([seriesName]); | |
1784 | } | |
1785 | } | |
1786 | ||
1787 | // Go through one more time and assign series to an axis defined by another | |
1788 | // series, e.g. { 'Y1: { axis: {} }, 'Y2': { axis: 'Y1' } } | |
1789 | for (var seriesName in extremes) { | |
1790 | if (!extremes.hasOwnProperty(seriesName)) continue; | |
1791 | var axis = this.attr_("axis", seriesName); | |
1792 | if (typeof(axis) == 'string') { | |
1793 | if (!seriesToAxisMap.hasOwnProperty(axis)) { | |
1794 | this.error("Series " + seriesName + " wants to share a y-axis with " + | |
1795 | "series " + axis + ", which does not define its own axis."); | |
1796 | return null; | |
1797 | } | |
1798 | var idx = seriesToAxisMap[axis]; | |
1799 | seriesToAxisMap[seriesName] = idx; | |
1800 | seriesForAxis[idx].push(seriesName); | |
1801 | } | |
1802 | } | |
1803 | ||
1804 | // Compute extreme values, a span and tick marks for each axis. | |
1805 | for (var i = 0; i < axes.length; i++) { | |
1806 | var axis = axes[i]; | |
1807 | if (!axis.valueRange) { | |
1808 | // Calcuate the extremes of extremes. | |
1809 | var series = seriesForAxis[i]; | |
1810 | var minY = Infinity; // extremes[series[0]][0]; | |
1811 | var maxY = -Infinity; // extremes[series[0]][1]; | |
1812 | for (var j = 0; j < series.length; j++) { | |
1813 | minY = Math.min(extremes[series[j]][0], minY); | |
e3b6727e | 1814 | maxY = Math.max(extremes[series[j]][1], maxY); |
f09fc545 DV |
1815 | } |
1816 | if (axis.includeZero && minY > 0) minY = 0; | |
1817 | ||
1818 | // Add some padding and round up to an integer to be human-friendly. | |
1819 | var span = maxY - minY; | |
1820 | // special case: if we have no sense of scale, use +/-10% of the sole value. | |
1821 | if (span == 0) { span = maxY; } | |
1822 | var maxAxisY = maxY + 0.1 * span; | |
1823 | var minAxisY = minY - 0.1 * span; | |
1824 | ||
1825 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. | |
1826 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; | |
1827 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
1828 | ||
1829 | if (this.attr_("includeZero")) { | |
1830 | if (maxY < 0) maxAxisY = 0; | |
1831 | if (minY > 0) minAxisY = 0; | |
1832 | } | |
1833 | ||
1834 | axis.valueRange = [minAxisY, maxAxisY]; | |
1835 | } | |
1836 | ||
1837 | // Add ticks. | |
1838 | axis.ticks = | |
1839 | Dygraph.numericTicks(axis.valueRange[0], | |
1840 | axis.valueRange[1], | |
1841 | this, | |
1842 | function(self, axis) { | |
1843 | return function(a) { | |
1844 | if (axis.hasOwnProperty(a)) return axis[a]; | |
1845 | return self.attr_(a); | |
1846 | }; | |
1847 | }(this, axis)); | |
1848 | } | |
1849 | ||
1850 | return [axes, seriesToAxisMap]; | |
1851 | }; | |
1852 | ||
1853 | /** | |
6a1aa64f DV |
1854 | * Calculates the rolling average of a data set. |
1855 | * If originalData is [label, val], rolls the average of those. | |
1856 | * If originalData is [label, [, it's interpreted as [value, stddev] | |
1857 | * and the roll is returned in the same form, with appropriately reduced | |
1858 | * stddev for each value. | |
1859 | * Note that this is where fractional input (i.e. '5/10') is converted into | |
1860 | * decimal values. | |
1861 | * @param {Array} originalData The data in the appropriate format (see above) | |
1862 | * @param {Number} rollPeriod The number of days over which to average the data | |
1863 | */ | |
285a6bda | 1864 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
6a1aa64f DV |
1865 | if (originalData.length < 2) |
1866 | return originalData; | |
1867 | var rollPeriod = Math.min(rollPeriod, originalData.length - 1); | |
1868 | var rollingData = []; | |
285a6bda | 1869 | var sigma = this.attr_("sigma"); |
6a1aa64f DV |
1870 | |
1871 | if (this.fractions_) { | |
1872 | var num = 0; | |
1873 | var den = 0; // numerator/denominator | |
1874 | var mult = 100.0; | |
1875 | for (var i = 0; i < originalData.length; i++) { | |
1876 | num += originalData[i][1][0]; | |
1877 | den += originalData[i][1][1]; | |
1878 | if (i - rollPeriod >= 0) { | |
1879 | num -= originalData[i - rollPeriod][1][0]; | |
1880 | den -= originalData[i - rollPeriod][1][1]; | |
1881 | } | |
1882 | ||
1883 | var date = originalData[i][0]; | |
1884 | var value = den ? num / den : 0.0; | |
285a6bda | 1885 | if (this.attr_("errorBars")) { |
6a1aa64f DV |
1886 | if (this.wilsonInterval_) { |
1887 | // For more details on this confidence interval, see: | |
1888 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval | |
1889 | if (den) { | |
1890 | var p = value < 0 ? 0 : value, n = den; | |
1891 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); | |
1892 | var denom = 1 + sigma * sigma / den; | |
1893 | var low = (p + sigma * sigma / (2 * den) - pm) / denom; | |
1894 | var high = (p + sigma * sigma / (2 * den) + pm) / denom; | |
1895 | rollingData[i] = [date, | |
1896 | [p * mult, (p - low) * mult, (high - p) * mult]]; | |
1897 | } else { | |
1898 | rollingData[i] = [date, [0, 0, 0]]; | |
1899 | } | |
1900 | } else { | |
1901 | var stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; | |
1902 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; | |
1903 | } | |
1904 | } else { | |
1905 | rollingData[i] = [date, mult * value]; | |
1906 | } | |
1907 | } | |
9922b78b | 1908 | } else if (this.attr_("customBars")) { |
f6885d6a DV |
1909 | var low = 0; |
1910 | var mid = 0; | |
1911 | var high = 0; | |
1912 | var count = 0; | |
6a1aa64f DV |
1913 | for (var i = 0; i < originalData.length; i++) { |
1914 | var data = originalData[i][1]; | |
1915 | var y = data[1]; | |
1916 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; | |
f6885d6a | 1917 | |
8b91c51f | 1918 | if (y != null && !isNaN(y)) { |
49a7d0d5 DV |
1919 | low += data[0]; |
1920 | mid += y; | |
1921 | high += data[2]; | |
1922 | count += 1; | |
1923 | } | |
f6885d6a DV |
1924 | if (i - rollPeriod >= 0) { |
1925 | var prev = originalData[i - rollPeriod]; | |
8b91c51f | 1926 | if (prev[1][1] != null && !isNaN(prev[1][1])) { |
49a7d0d5 DV |
1927 | low -= prev[1][0]; |
1928 | mid -= prev[1][1]; | |
1929 | high -= prev[1][2]; | |
1930 | count -= 1; | |
1931 | } | |
f6885d6a DV |
1932 | } |
1933 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, | |
1934 | 1.0 * (mid - low) / count, | |
1935 | 1.0 * (high - mid) / count ]]; | |
2769de62 | 1936 | } |
6a1aa64f DV |
1937 | } else { |
1938 | // Calculate the rolling average for the first rollPeriod - 1 points where | |
1939 | // there is not enough data to roll over the full number of days | |
1940 | var num_init_points = Math.min(rollPeriod - 1, originalData.length - 2); | |
285a6bda | 1941 | if (!this.attr_("errorBars")){ |
5011e7a1 DV |
1942 | if (rollPeriod == 1) { |
1943 | return originalData; | |
1944 | } | |
1945 | ||
2847c1cf | 1946 | for (var i = 0; i < originalData.length; i++) { |
6a1aa64f | 1947 | var sum = 0; |
5011e7a1 | 1948 | var num_ok = 0; |
2847c1cf DV |
1949 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
1950 | var y = originalData[j][1]; | |
8b91c51f | 1951 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 1952 | num_ok++; |
2847c1cf | 1953 | sum += originalData[j][1]; |
6a1aa64f | 1954 | } |
5011e7a1 | 1955 | if (num_ok) { |
2847c1cf | 1956 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
5011e7a1 | 1957 | } else { |
2847c1cf | 1958 | rollingData[i] = [originalData[i][0], null]; |
5011e7a1 | 1959 | } |
6a1aa64f | 1960 | } |
2847c1cf DV |
1961 | |
1962 | } else { | |
1963 | for (var i = 0; i < originalData.length; i++) { | |
6a1aa64f DV |
1964 | var sum = 0; |
1965 | var variance = 0; | |
5011e7a1 | 1966 | var num_ok = 0; |
2847c1cf | 1967 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
5011e7a1 | 1968 | var y = originalData[j][1][0]; |
8b91c51f | 1969 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 1970 | num_ok++; |
6a1aa64f DV |
1971 | sum += originalData[j][1][0]; |
1972 | variance += Math.pow(originalData[j][1][1], 2); | |
1973 | } | |
5011e7a1 DV |
1974 | if (num_ok) { |
1975 | var stddev = Math.sqrt(variance) / num_ok; | |
1976 | rollingData[i] = [originalData[i][0], | |
1977 | [sum / num_ok, sigma * stddev, sigma * stddev]]; | |
1978 | } else { | |
1979 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
1980 | } | |
6a1aa64f DV |
1981 | } |
1982 | } | |
1983 | } | |
1984 | ||
1985 | return rollingData; | |
1986 | }; | |
1987 | ||
1988 | /** | |
1989 | * Parses a date, returning the number of milliseconds since epoch. This can be | |
285a6bda DV |
1990 | * passed in as an xValueParser in the Dygraph constructor. |
1991 | * TODO(danvk): enumerate formats that this understands. | |
6a1aa64f DV |
1992 | * @param {String} A date in YYYYMMDD format. |
1993 | * @return {Number} Milliseconds since epoch. | |
1994 | * @public | |
1995 | */ | |
285a6bda | 1996 | Dygraph.dateParser = function(dateStr, self) { |
6a1aa64f | 1997 | var dateStrSlashed; |
285a6bda | 1998 | var d; |
986a5026 | 1999 | if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12' |
6a1aa64f | 2000 | dateStrSlashed = dateStr.replace("-", "/", "g"); |
353a0294 DV |
2001 | while (dateStrSlashed.search("-") != -1) { |
2002 | dateStrSlashed = dateStrSlashed.replace("-", "/"); | |
2003 | } | |
285a6bda | 2004 | d = Date.parse(dateStrSlashed); |
2769de62 | 2005 | } else if (dateStr.length == 8) { // e.g. '20090712' |
285a6bda | 2006 | // TODO(danvk): remove support for this format. It's confusing. |
6a1aa64f DV |
2007 | dateStrSlashed = dateStr.substr(0,4) + "/" + dateStr.substr(4,2) |
2008 | + "/" + dateStr.substr(6,2); | |
285a6bda | 2009 | d = Date.parse(dateStrSlashed); |
2769de62 DV |
2010 | } else { |
2011 | // Any format that Date.parse will accept, e.g. "2009/07/12" or | |
2012 | // "2009/07/12 12:34:56" | |
285a6bda DV |
2013 | d = Date.parse(dateStr); |
2014 | } | |
2015 | ||
2016 | if (!d || isNaN(d)) { | |
2017 | self.error("Couldn't parse " + dateStr + " as a date"); | |
2018 | } | |
2019 | return d; | |
2020 | }; | |
2021 | ||
2022 | /** | |
2023 | * Detects the type of the str (date or numeric) and sets the various | |
2024 | * formatting attributes in this.attrs_ based on this type. | |
2025 | * @param {String} str An x value. | |
2026 | * @private | |
2027 | */ | |
2028 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
2029 | var isDate = false; | |
2030 | if (str.indexOf('-') >= 0 || | |
2031 | str.indexOf('/') >= 0 || | |
2032 | isNaN(parseFloat(str))) { | |
2033 | isDate = true; | |
2034 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
2035 | // TODO(danvk): remove support for this format. | |
2036 | isDate = true; | |
2037 | } | |
2038 | ||
2039 | if (isDate) { | |
2040 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
2041 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2042 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2043 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
2044 | } else { |
2045 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
2046 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
2047 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2048 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
6a1aa64f | 2049 | } |
6a1aa64f DV |
2050 | }; |
2051 | ||
2052 | /** | |
2053 | * Parses a string in a special csv format. We expect a csv file where each | |
2054 | * line is a date point, and the first field in each line is the date string. | |
2055 | * We also expect that all remaining fields represent series. | |
285a6bda | 2056 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f DV |
2057 | * date, series1, stddev1, series2, stddev2, ... |
2058 | * @param {Array.<Object>} data See above. | |
2059 | * @private | |
285a6bda DV |
2060 | * |
2061 | * @return Array.<Object> An array with one entry for each row. These entries | |
2062 | * are an array of cells in that row. The first entry is the parsed x-value for | |
2063 | * the row. The second, third, etc. are the y-values. These can take on one of | |
2064 | * three forms, depending on the CSV and constructor parameters: | |
2065 | * 1. numeric value | |
2066 | * 2. [ value, stddev ] | |
2067 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 2068 | */ |
285a6bda | 2069 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f DV |
2070 | var ret = []; |
2071 | var lines = data.split("\n"); | |
3d67f03b DV |
2072 | |
2073 | // Use the default delimiter or fall back to a tab if that makes sense. | |
2074 | var delim = this.attr_('delimiter'); | |
2075 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { | |
2076 | delim = '\t'; | |
2077 | } | |
2078 | ||
285a6bda | 2079 | var start = 0; |
6a1aa64f | 2080 | if (this.labelsFromCSV_) { |
285a6bda | 2081 | start = 1; |
3d67f03b | 2082 | this.attrs_.labels = lines[0].split(delim); |
6a1aa64f DV |
2083 | } |
2084 | ||
03b522a4 DV |
2085 | // Parse the x as a float or return null if it's not a number. |
2086 | var parseFloatOrNull = function(x) { | |
41333ec0 DV |
2087 | var val = parseFloat(x); |
2088 | return isNaN(val) ? null : val; | |
03b522a4 DV |
2089 | }; |
2090 | ||
285a6bda DV |
2091 | var xParser; |
2092 | var defaultParserSet = false; // attempt to auto-detect x value type | |
2093 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 2094 | var outOfOrder = false; |
6a1aa64f DV |
2095 | for (var i = start; i < lines.length; i++) { |
2096 | var line = lines[i]; | |
2097 | if (line.length == 0) continue; // skip blank lines | |
3d67f03b DV |
2098 | if (line[0] == '#') continue; // skip comment lines |
2099 | var inFields = line.split(delim); | |
285a6bda | 2100 | if (inFields.length < 2) continue; |
6a1aa64f DV |
2101 | |
2102 | var fields = []; | |
285a6bda DV |
2103 | if (!defaultParserSet) { |
2104 | this.detectTypeFromString_(inFields[0]); | |
2105 | xParser = this.attr_("xValueParser"); | |
2106 | defaultParserSet = true; | |
2107 | } | |
2108 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
2109 | |
2110 | // If fractions are expected, parse the numbers as "A/B" | |
2111 | if (this.fractions_) { | |
2112 | for (var j = 1; j < inFields.length; j++) { | |
2113 | // TODO(danvk): figure out an appropriate way to flag parse errors. | |
2114 | var vals = inFields[j].split("/"); | |
03b522a4 | 2115 | fields[j] = [parseFloatOrNull(vals[0]), parseFloatOrNull(vals[1])]; |
6a1aa64f | 2116 | } |
285a6bda | 2117 | } else if (this.attr_("errorBars")) { |
6a1aa64f DV |
2118 | // If there are error bars, values are (value, stddev) pairs |
2119 | for (var j = 1; j < inFields.length; j += 2) | |
03b522a4 DV |
2120 | fields[(j + 1) / 2] = [parseFloatOrNull(inFields[j]), |
2121 | parseFloatOrNull(inFields[j + 1])]; | |
9922b78b | 2122 | } else if (this.attr_("customBars")) { |
6a1aa64f DV |
2123 | // Bars are a low;center;high tuple |
2124 | for (var j = 1; j < inFields.length; j++) { | |
2125 | var vals = inFields[j].split(";"); | |
03b522a4 DV |
2126 | fields[j] = [ parseFloatOrNull(vals[0]), |
2127 | parseFloatOrNull(vals[1]), | |
2128 | parseFloatOrNull(vals[2]) ]; | |
6a1aa64f DV |
2129 | } |
2130 | } else { | |
2131 | // Values are just numbers | |
285a6bda | 2132 | for (var j = 1; j < inFields.length; j++) { |
03b522a4 | 2133 | fields[j] = parseFloatOrNull(inFields[j]); |
285a6bda | 2134 | } |
6a1aa64f | 2135 | } |
987840a2 DV |
2136 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
2137 | outOfOrder = true; | |
2138 | } | |
6a1aa64f | 2139 | ret.push(fields); |
285a6bda DV |
2140 | |
2141 | if (fields.length != expectedCols) { | |
2142 | this.error("Number of columns in line " + i + " (" + fields.length + | |
2143 | ") does not agree with number of labels (" + expectedCols + | |
2144 | ") " + line); | |
2145 | } | |
6a1aa64f | 2146 | } |
987840a2 DV |
2147 | |
2148 | if (outOfOrder) { | |
2149 | this.warn("CSV is out of order; order it correctly to speed loading."); | |
2150 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2151 | } | |
2152 | ||
6a1aa64f DV |
2153 | return ret; |
2154 | }; | |
2155 | ||
2156 | /** | |
285a6bda DV |
2157 | * The user has provided their data as a pre-packaged JS array. If the x values |
2158 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
2159 | * are dates, we need to convert them from Date objects to ms since epoch. | |
2160 | * @param {Array.<Object>} data | |
2161 | * @return {Array.<Object>} data with numeric x values. | |
2162 | */ | |
2163 | Dygraph.prototype.parseArray_ = function(data) { | |
2164 | // Peek at the first x value to see if it's numeric. | |
2165 | if (data.length == 0) { | |
2166 | this.error("Can't plot empty data set"); | |
2167 | return null; | |
2168 | } | |
2169 | if (data[0].length == 0) { | |
2170 | this.error("Data set cannot contain an empty row"); | |
2171 | return null; | |
2172 | } | |
2173 | ||
2174 | if (this.attr_("labels") == null) { | |
2175 | this.warn("Using default labels. Set labels explicitly via 'labels' " + | |
2176 | "in the options parameter"); | |
2177 | this.attrs_.labels = [ "X" ]; | |
2178 | for (var i = 1; i < data[0].length; i++) { | |
2179 | this.attrs_.labels.push("Y" + i); | |
2180 | } | |
2181 | } | |
2182 | ||
2dda3850 | 2183 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda DV |
2184 | // Some intelligent defaults for a date x-axis. |
2185 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
bf640e56 | 2186 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
2187 | this.attrs_.xTicker = Dygraph.dateTicker; |
2188 | ||
2189 | // Assume they're all dates. | |
e3ab7b40 | 2190 | var parsedData = Dygraph.clone(data); |
285a6bda DV |
2191 | for (var i = 0; i < data.length; i++) { |
2192 | if (parsedData[i].length == 0) { | |
a323ff4a | 2193 | this.error("Row " + (1 + i) + " of data is empty"); |
285a6bda DV |
2194 | return null; |
2195 | } | |
2196 | if (parsedData[i][0] == null | |
3a909ec5 DV |
2197 | || typeof(parsedData[i][0].getTime) != 'function' |
2198 | || isNaN(parsedData[i][0].getTime())) { | |
be96a1f5 | 2199 | this.error("x value in row " + (1 + i) + " is not a Date"); |
285a6bda DV |
2200 | return null; |
2201 | } | |
2202 | parsedData[i][0] = parsedData[i][0].getTime(); | |
2203 | } | |
2204 | return parsedData; | |
2205 | } else { | |
2206 | // Some intelligent defaults for a numeric x-axis. | |
2207 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
2208 | this.attrs_.xTicker = Dygraph.numericTicks; | |
2209 | return data; | |
2210 | } | |
2211 | }; | |
2212 | ||
2213 | /** | |
79420a1e DV |
2214 | * Parses a DataTable object from gviz. |
2215 | * The data is expected to have a first column that is either a date or a | |
2216 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
2217 | * between this.xValueParser_ and the type of the first column, it will be | |
a685723c | 2218 | * fixed. Fills out rawData_. |
79420a1e DV |
2219 | * @param {Array.<Object>} data See above. |
2220 | * @private | |
2221 | */ | |
285a6bda | 2222 | Dygraph.prototype.parseDataTable_ = function(data) { |
79420a1e DV |
2223 | var cols = data.getNumberOfColumns(); |
2224 | var rows = data.getNumberOfRows(); | |
2225 | ||
d955e223 | 2226 | var indepType = data.getColumnType(0); |
4440f6c8 | 2227 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda DV |
2228 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
2229 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2230 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2231 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
33127159 | 2232 | } else if (indepType == 'number') { |
285a6bda DV |
2233 | this.attrs_.xValueFormatter = function(x) { return x; }; |
2234 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
2235 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2236 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
285a6bda | 2237 | } else { |
987840a2 DV |
2238 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
2239 | "column 1 of DataTable input (Got '" + indepType + "')"); | |
79420a1e DV |
2240 | return null; |
2241 | } | |
2242 | ||
a685723c DV |
2243 | // Array of the column indices which contain data (and not annotations). |
2244 | var colIdx = []; | |
2245 | var annotationCols = {}; // data index -> [annotation cols] | |
2246 | var hasAnnotations = false; | |
2247 | for (var i = 1; i < cols; i++) { | |
2248 | var type = data.getColumnType(i); | |
2249 | if (type == 'number') { | |
2250 | colIdx.push(i); | |
2251 | } else if (type == 'string' && this.attr_('displayAnnotations')) { | |
2252 | // This is OK -- it's an annotation column. | |
2253 | var dataIdx = colIdx[colIdx.length - 1]; | |
2254 | if (!annotationCols.hasOwnProperty(dataIdx)) { | |
2255 | annotationCols[dataIdx] = [i]; | |
2256 | } else { | |
2257 | annotationCols[dataIdx].push(i); | |
2258 | } | |
2259 | hasAnnotations = true; | |
2260 | } else { | |
2261 | this.error("Only 'number' is supported as a dependent type with Gviz." + | |
2262 | " 'string' is only supported if displayAnnotations is true"); | |
2263 | } | |
2264 | } | |
2265 | ||
2266 | // Read column labels | |
2267 | // TODO(danvk): add support back for errorBars | |
2268 | var labels = [data.getColumnLabel(0)]; | |
2269 | for (var i = 0; i < colIdx.length; i++) { | |
2270 | labels.push(data.getColumnLabel(colIdx[i])); | |
f9348814 | 2271 | if (this.attr_("errorBars")) i += 1; |
a685723c DV |
2272 | } |
2273 | this.attrs_.labels = labels; | |
2274 | cols = labels.length; | |
2275 | ||
79420a1e | 2276 | var ret = []; |
987840a2 | 2277 | var outOfOrder = false; |
a685723c | 2278 | var annotations = []; |
79420a1e DV |
2279 | for (var i = 0; i < rows; i++) { |
2280 | var row = []; | |
debe4434 DV |
2281 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
2282 | data.getValue(i, 0) === null) { | |
129569a5 FD |
2283 | this.warn("Ignoring row " + i + |
2284 | " of DataTable because of undefined or null first column."); | |
debe4434 DV |
2285 | continue; |
2286 | } | |
2287 | ||
c21d2c2d | 2288 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
2289 | row.push(data.getValue(i, 0).getTime()); |
2290 | } else { | |
2291 | row.push(data.getValue(i, 0)); | |
2292 | } | |
3e3f84e4 | 2293 | if (!this.attr_("errorBars")) { |
a685723c DV |
2294 | for (var j = 0; j < colIdx.length; j++) { |
2295 | var col = colIdx[j]; | |
2296 | row.push(data.getValue(i, col)); | |
2297 | if (hasAnnotations && | |
2298 | annotationCols.hasOwnProperty(col) && | |
2299 | data.getValue(i, annotationCols[col][0]) != null) { | |
2300 | var ann = {}; | |
2301 | ann.series = data.getColumnLabel(col); | |
2302 | ann.xval = row[0]; | |
2303 | ann.shortText = String.fromCharCode(65 /* A */ + annotations.length) | |
2304 | ann.text = ''; | |
2305 | for (var k = 0; k < annotationCols[col].length; k++) { | |
2306 | if (k) ann.text += "\n"; | |
2307 | ann.text += data.getValue(i, annotationCols[col][k]); | |
2308 | } | |
2309 | annotations.push(ann); | |
2310 | } | |
3e3f84e4 DV |
2311 | } |
2312 | } else { | |
2313 | for (var j = 0; j < cols - 1; j++) { | |
2314 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); | |
2315 | } | |
79420a1e | 2316 | } |
987840a2 DV |
2317 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
2318 | outOfOrder = true; | |
2319 | } | |
243d96e8 | 2320 | ret.push(row); |
79420a1e | 2321 | } |
987840a2 DV |
2322 | |
2323 | if (outOfOrder) { | |
2324 | this.warn("DataTable is out of order; order it correctly to speed loading."); | |
2325 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2326 | } | |
a685723c DV |
2327 | this.rawData_ = ret; |
2328 | ||
2329 | if (annotations.length > 0) { | |
2330 | this.setAnnotations(annotations, true); | |
2331 | } | |
79420a1e DV |
2332 | } |
2333 | ||
24e5350c | 2334 | // These functions are all based on MochiKit. |
fc80a396 DV |
2335 | Dygraph.update = function (self, o) { |
2336 | if (typeof(o) != 'undefined' && o !== null) { | |
2337 | for (var k in o) { | |
85b99f0b DV |
2338 | if (o.hasOwnProperty(k)) { |
2339 | self[k] = o[k]; | |
2340 | } | |
fc80a396 DV |
2341 | } |
2342 | } | |
2343 | return self; | |
2344 | }; | |
2345 | ||
2dda3850 DV |
2346 | Dygraph.isArrayLike = function (o) { |
2347 | var typ = typeof(o); | |
2348 | if ( | |
c21d2c2d | 2349 | (typ != 'object' && !(typ == 'function' && |
2dda3850 DV |
2350 | typeof(o.item) == 'function')) || |
2351 | o === null || | |
2352 | typeof(o.length) != 'number' || | |
2353 | o.nodeType === 3 | |
2354 | ) { | |
2355 | return false; | |
2356 | } | |
2357 | return true; | |
2358 | }; | |
2359 | ||
2360 | Dygraph.isDateLike = function (o) { | |
2361 | if (typeof(o) != "object" || o === null || | |
2362 | typeof(o.getTime) != 'function') { | |
2363 | return false; | |
2364 | } | |
2365 | return true; | |
2366 | }; | |
2367 | ||
e3ab7b40 DV |
2368 | Dygraph.clone = function(o) { |
2369 | // TODO(danvk): figure out how MochiKit's version works | |
2370 | var r = []; | |
2371 | for (var i = 0; i < o.length; i++) { | |
2372 | if (Dygraph.isArrayLike(o[i])) { | |
2373 | r.push(Dygraph.clone(o[i])); | |
2374 | } else { | |
2375 | r.push(o[i]); | |
2376 | } | |
2377 | } | |
2378 | return r; | |
24e5350c DV |
2379 | }; |
2380 | ||
2dda3850 | 2381 | |
79420a1e | 2382 | /** |
6a1aa64f DV |
2383 | * Get the CSV data. If it's in a function, call that function. If it's in a |
2384 | * file, do an XMLHttpRequest to get it. | |
2385 | * @private | |
2386 | */ | |
285a6bda | 2387 | Dygraph.prototype.start_ = function() { |
6a1aa64f | 2388 | if (typeof this.file_ == 'function') { |
285a6bda | 2389 | // CSV string. Pretend we got it via XHR. |
6a1aa64f | 2390 | this.loadedEvent_(this.file_()); |
2dda3850 | 2391 | } else if (Dygraph.isArrayLike(this.file_)) { |
285a6bda DV |
2392 | this.rawData_ = this.parseArray_(this.file_); |
2393 | this.drawGraph_(this.rawData_); | |
79420a1e DV |
2394 | } else if (typeof this.file_ == 'object' && |
2395 | typeof this.file_.getColumnRange == 'function') { | |
2396 | // must be a DataTable from gviz. | |
a685723c | 2397 | this.parseDataTable_(this.file_); |
79420a1e | 2398 | this.drawGraph_(this.rawData_); |
285a6bda DV |
2399 | } else if (typeof this.file_ == 'string') { |
2400 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. | |
2401 | if (this.file_.indexOf('\n') >= 0) { | |
2402 | this.loadedEvent_(this.file_); | |
2403 | } else { | |
2404 | var req = new XMLHttpRequest(); | |
2405 | var caller = this; | |
2406 | req.onreadystatechange = function () { | |
2407 | if (req.readyState == 4) { | |
2408 | if (req.status == 200) { | |
2409 | caller.loadedEvent_(req.responseText); | |
2410 | } | |
6a1aa64f | 2411 | } |
285a6bda | 2412 | }; |
6a1aa64f | 2413 | |
285a6bda DV |
2414 | req.open("GET", this.file_, true); |
2415 | req.send(null); | |
2416 | } | |
2417 | } else { | |
2418 | this.error("Unknown data format: " + (typeof this.file_)); | |
6a1aa64f DV |
2419 | } |
2420 | }; | |
2421 | ||
2422 | /** | |
2423 | * Changes various properties of the graph. These can include: | |
2424 | * <ul> | |
2425 | * <li>file: changes the source data for the graph</li> | |
2426 | * <li>errorBars: changes whether the data contains stddev</li> | |
2427 | * </ul> | |
2428 | * @param {Object} attrs The new properties and values | |
2429 | */ | |
285a6bda DV |
2430 | Dygraph.prototype.updateOptions = function(attrs) { |
2431 | // TODO(danvk): this is a mess. Rethink this function. | |
6a1aa64f DV |
2432 | if (attrs.rollPeriod) { |
2433 | this.rollPeriod_ = attrs.rollPeriod; | |
2434 | } | |
2435 | if (attrs.dateWindow) { | |
2436 | this.dateWindow_ = attrs.dateWindow; | |
2437 | } | |
450fe64b DV |
2438 | |
2439 | // TODO(danvk): validate per-series options. | |
46dde5f9 DV |
2440 | // Supported: |
2441 | // strokeWidth | |
2442 | // pointSize | |
2443 | // drawPoints | |
2444 | // highlightCircleSize | |
450fe64b | 2445 | |
fc80a396 | 2446 | Dygraph.update(this.user_attrs_, attrs); |
87bb7958 | 2447 | Dygraph.update(this.renderOptions_, attrs); |
285a6bda DV |
2448 | |
2449 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
9012dd21 | 2450 | this.computeYaxes_(); |
285a6bda DV |
2451 | |
2452 | // TODO(danvk): this doesn't match the constructor logic | |
2453 | this.layout_.updateOptions({ 'errorBars': this.attr_("errorBars") }); | |
5e50289f | 2454 | if (attrs['file']) { |
6a1aa64f DV |
2455 | this.file_ = attrs['file']; |
2456 | this.start_(); | |
2457 | } else { | |
2458 | this.drawGraph_(this.rawData_); | |
2459 | } | |
2460 | }; | |
2461 | ||
2462 | /** | |
697e70b2 DV |
2463 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
2464 | * containing div (which has presumably changed size since the dygraph was | |
2465 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
2466 | * |
2467 | * This is far more efficient than destroying and re-instantiating a | |
2468 | * Dygraph, since it doesn't have to reparse the underlying data. | |
2469 | * | |
697e70b2 DV |
2470 | * @param {Number} width Width (in pixels) |
2471 | * @param {Number} height Height (in pixels) | |
2472 | */ | |
2473 | Dygraph.prototype.resize = function(width, height) { | |
e8c7ef86 DV |
2474 | if (this.resize_lock) { |
2475 | return; | |
2476 | } | |
2477 | this.resize_lock = true; | |
2478 | ||
697e70b2 DV |
2479 | if ((width === null) != (height === null)) { |
2480 | this.warn("Dygraph.resize() should be called with zero parameters or " + | |
2481 | "two non-NULL parameters. Pretending it was zero."); | |
2482 | width = height = null; | |
2483 | } | |
2484 | ||
b16e6369 | 2485 | // TODO(danvk): there should be a clear() method. |
697e70b2 | 2486 | this.maindiv_.innerHTML = ""; |
b16e6369 DV |
2487 | this.attrs_.labelsDiv = null; |
2488 | ||
697e70b2 DV |
2489 | if (width) { |
2490 | this.maindiv_.style.width = width + "px"; | |
2491 | this.maindiv_.style.height = height + "px"; | |
2492 | this.width_ = width; | |
2493 | this.height_ = height; | |
2494 | } else { | |
2495 | this.width_ = this.maindiv_.offsetWidth; | |
2496 | this.height_ = this.maindiv_.offsetHeight; | |
2497 | } | |
2498 | ||
2499 | this.createInterface_(); | |
964f30c6 | 2500 | this.drawGraph_(this.rawData_); |
e8c7ef86 DV |
2501 | |
2502 | this.resize_lock = false; | |
697e70b2 DV |
2503 | }; |
2504 | ||
2505 | /** | |
6a1aa64f DV |
2506 | * Adjusts the number of days in the rolling average. Updates the graph to |
2507 | * reflect the new averaging period. | |
2508 | * @param {Number} length Number of days over which to average the data. | |
2509 | */ | |
285a6bda | 2510 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f DV |
2511 | this.rollPeriod_ = length; |
2512 | this.drawGraph_(this.rawData_); | |
2513 | }; | |
540d00f1 | 2514 | |
f8cfec73 | 2515 | /** |
1cf11047 DV |
2516 | * Returns a boolean array of visibility statuses. |
2517 | */ | |
2518 | Dygraph.prototype.visibility = function() { | |
2519 | // Do lazy-initialization, so that this happens after we know the number of | |
2520 | // data series. | |
2521 | if (!this.attr_("visibility")) { | |
f38dec01 | 2522 | this.attrs_["visibility"] = []; |
1cf11047 DV |
2523 | } |
2524 | while (this.attr_("visibility").length < this.rawData_[0].length - 1) { | |
f38dec01 | 2525 | this.attr_("visibility").push(true); |
1cf11047 DV |
2526 | } |
2527 | return this.attr_("visibility"); | |
2528 | }; | |
2529 | ||
2530 | /** | |
2531 | * Changes the visiblity of a series. | |
2532 | */ | |
2533 | Dygraph.prototype.setVisibility = function(num, value) { | |
2534 | var x = this.visibility(); | |
2535 | if (num < 0 && num >= x.length) { | |
2536 | this.warn("invalid series number in setVisibility: " + num); | |
2537 | } else { | |
2538 | x[num] = value; | |
2539 | this.drawGraph_(this.rawData_); | |
2540 | } | |
2541 | }; | |
2542 | ||
2543 | /** | |
5c528fa2 DV |
2544 | * Update the list of annotations and redraw the chart. |
2545 | */ | |
a685723c | 2546 | Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { |
3c51ab74 DV |
2547 | // Only add the annotation CSS rule once we know it will be used. |
2548 | Dygraph.addAnnotationRule(); | |
5c528fa2 DV |
2549 | this.annotations_ = ann; |
2550 | this.layout_.setAnnotations(this.annotations_); | |
a685723c DV |
2551 | if (!suppressDraw) { |
2552 | this.drawGraph_(this.rawData_); | |
2553 | } | |
5c528fa2 DV |
2554 | }; |
2555 | ||
2556 | /** | |
2557 | * Return the list of annotations. | |
2558 | */ | |
2559 | Dygraph.prototype.annotations = function() { | |
2560 | return this.annotations_; | |
2561 | }; | |
2562 | ||
46dde5f9 DV |
2563 | /** |
2564 | * Get the index of a series (column) given its name. The first column is the | |
2565 | * x-axis, so the data series start with index 1. | |
2566 | */ | |
2567 | Dygraph.prototype.indexFromSetName = function(name) { | |
2568 | var labels = this.attr_("labels"); | |
2569 | for (var i = 0; i < labels.length; i++) { | |
2570 | if (labels[i] == name) return i; | |
2571 | } | |
2572 | return null; | |
2573 | }; | |
2574 | ||
5c528fa2 DV |
2575 | Dygraph.addAnnotationRule = function() { |
2576 | if (Dygraph.addedAnnotationCSS) return; | |
2577 | ||
18a016b1 DV |
2578 | var mysheet; |
2579 | if (document.styleSheets.length > 0) { | |
2580 | mysheet = document.styleSheets[0]; | |
2581 | } else { | |
2582 | var styleSheetElement = document.createElement("style"); | |
2583 | styleSheetElement.type = "text/css"; | |
2584 | document.getElementsByTagName("head")[0].appendChild(styleSheetElement); | |
2585 | for(i = 0; i < document.styleSheets.length; i++) { | |
2586 | if (document.styleSheets[i].disabled) continue; | |
2587 | mysheet = document.styleSheets[i]; | |
2588 | } | |
2589 | } | |
2590 | ||
5c528fa2 DV |
2591 | var rule = "border: 1px solid black; " + |
2592 | "background-color: white; " + | |
2593 | "text-align: center;"; | |
2594 | if (mysheet.insertRule) { // Firefox | |
52e266a3 DV |
2595 | var idx = mysheet.cssRules ? mysheet.cssRules.length : 0; |
2596 | mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", idx); | |
5c528fa2 DV |
2597 | } else if (mysheet.addRule) { // IE |
2598 | mysheet.addRule(".dygraphDefaultAnnotation", rule); | |
2599 | } | |
2600 | ||
2601 | Dygraph.addedAnnotationCSS = true; | |
2602 | } | |
2603 | ||
2604 | /** | |
f8cfec73 DV |
2605 | * Create a new canvas element. This is more complex than a simple |
2606 | * document.createElement("canvas") because of IE and excanvas. | |
2607 | */ | |
2608 | Dygraph.createCanvas = function() { | |
2609 | var canvas = document.createElement("canvas"); | |
2610 | ||
2611 | isIE = (/MSIE/.test(navigator.userAgent) && !window.opera); | |
8b8f2d59 | 2612 | if (isIE && (typeof(G_vmlCanvasManager) != 'undefined')) { |
f8cfec73 DV |
2613 | canvas = G_vmlCanvasManager.initElement(canvas); |
2614 | } | |
2615 | ||
2616 | return canvas; | |
2617 | }; | |
2618 | ||
540d00f1 DV |
2619 | |
2620 | /** | |
285a6bda | 2621 | * A wrapper around Dygraph that implements the gviz API. |
540d00f1 DV |
2622 | * @param {Object} container The DOM object the visualization should live in. |
2623 | */ | |
285a6bda | 2624 | Dygraph.GVizChart = function(container) { |
540d00f1 DV |
2625 | this.container = container; |
2626 | } | |
2627 | ||
285a6bda | 2628 | Dygraph.GVizChart.prototype.draw = function(data, options) { |
540d00f1 | 2629 | this.container.innerHTML = ''; |
285a6bda | 2630 | this.date_graph = new Dygraph(this.container, data, options); |
540d00f1 | 2631 | } |
285a6bda | 2632 | |
239c712d NAG |
2633 | /** |
2634 | * Google charts compatible setSelection | |
50360fd0 | 2635 | * Only row selection is supported, all points in the row will be highlighted |
239c712d NAG |
2636 | * @param {Array} array of the selected cells |
2637 | * @public | |
2638 | */ | |
2639 | Dygraph.GVizChart.prototype.setSelection = function(selection_array) { | |
2640 | var row = false; | |
2641 | if (selection_array.length) { | |
2642 | row = selection_array[0].row; | |
2643 | } | |
2644 | this.date_graph.setSelection(row); | |
2645 | } | |
2646 | ||
103b7292 NAG |
2647 | /** |
2648 | * Google charts compatible getSelection implementation | |
2649 | * @return {Array} array of the selected cells | |
2650 | * @public | |
2651 | */ | |
2652 | Dygraph.GVizChart.prototype.getSelection = function() { | |
2653 | var selection = []; | |
50360fd0 | 2654 | |
103b7292 | 2655 | var row = this.date_graph.getSelection(); |
50360fd0 | 2656 | |
103b7292 | 2657 | if (row < 0) return selection; |
50360fd0 | 2658 | |
103b7292 NAG |
2659 | col = 1; |
2660 | for (var i in this.date_graph.layout_.datasets) { | |
2661 | selection.push({row: row, column: col}); | |
2662 | col++; | |
2663 | } | |
2664 | ||
2665 | return selection; | |
2666 | } | |
2667 | ||
285a6bda DV |
2668 | // Older pages may still use this name. |
2669 | DateGraph = Dygraph; |