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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 | ||
727439b4 | 40 | For further documentation and examples, see http://dygraphs.com/ |
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 | |
3c1d225b JB |
98 | yValueFormatter: function(x, opt_numDigits) { |
99 | return x.toPrecision(opt_numDigits || 2); | |
100 | }, | |
285a6bda DV |
101 | |
102 | strokeWidth: 1.0, | |
8e4a6af3 | 103 | |
8846615a DV |
104 | axisTickSize: 3, |
105 | axisLabelFontSize: 14, | |
106 | xAxisLabelWidth: 50, | |
107 | yAxisLabelWidth: 50, | |
bf640e56 | 108 | xAxisLabelFormatter: Dygraph.dateAxisFormatter, |
8846615a | 109 | rightGap: 5, |
285a6bda DV |
110 | |
111 | showRoller: false, | |
112 | xValueFormatter: Dygraph.dateString_, | |
113 | xValueParser: Dygraph.dateParser, | |
114 | xTicker: Dygraph.dateTicker, | |
115 | ||
3d67f03b DV |
116 | delimiter: ',', |
117 | ||
ff00d3e2 | 118 | logScale: false, |
285a6bda DV |
119 | sigma: 2.0, |
120 | errorBars: false, | |
121 | fractions: false, | |
122 | wilsonInterval: true, // only relevant if fractions is true | |
5954ef32 | 123 | customBars: false, |
43af96e7 NK |
124 | fillGraph: false, |
125 | fillAlpha: 0.15, | |
f032c51d | 126 | connectSeparatedPoints: false, |
43af96e7 NK |
127 | |
128 | stackedGraph: false, | |
afdc483f NN |
129 | hideOverlayOnMouseOut: true, |
130 | ||
00c281d4 NN |
131 | stepPlot: false, |
132 | avoidMinZero: false | |
285a6bda DV |
133 | }; |
134 | ||
135 | // Various logging levels. | |
136 | Dygraph.DEBUG = 1; | |
137 | Dygraph.INFO = 2; | |
138 | Dygraph.WARNING = 3; | |
139 | Dygraph.ERROR = 3; | |
140 | ||
39b0e098 RK |
141 | // Directions for panning and zooming. Use bit operations when combined |
142 | // values are possible. | |
143 | Dygraph.HORIZONTAL = 1; | |
144 | Dygraph.VERTICAL = 2; | |
145 | ||
5c528fa2 DV |
146 | // Used for initializing annotation CSS rules only once. |
147 | Dygraph.addedAnnotationCSS = false; | |
148 | ||
285a6bda DV |
149 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { |
150 | // Labels is no longer a constructor parameter, since it's typically set | |
151 | // directly from the data source. It also conains a name for the x-axis, | |
152 | // which the previous constructor form did not. | |
153 | if (labels != null) { | |
154 | var new_labels = ["Date"]; | |
155 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); | |
fc80a396 | 156 | Dygraph.update(attrs, { 'labels': new_labels }); |
285a6bda DV |
157 | } |
158 | this.__init__(div, file, attrs); | |
8e4a6af3 DV |
159 | }; |
160 | ||
6a1aa64f | 161 | /** |
285a6bda | 162 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
6a1aa64f DV |
163 | * and interaction <canvas> inside of it. See the constructor for details |
164 | * on the parameters. | |
12e4c741 | 165 | * @param {Element} div the Element to render the graph into. |
6a1aa64f | 166 | * @param {String | Function} file Source data |
6a1aa64f DV |
167 | * @param {Object} attrs Miscellaneous other options |
168 | * @private | |
169 | */ | |
285a6bda | 170 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
a2c8fff4 DV |
171 | // Hack for IE: if we're using excanvas and the document hasn't finished |
172 | // loading yet (and hence may not have initialized whatever it needs to | |
173 | // initialize), then keep calling this routine periodically until it has. | |
174 | if (/MSIE/.test(navigator.userAgent) && !window.opera && | |
175 | typeof(G_vmlCanvasManager) != 'undefined' && | |
176 | document.readyState != 'complete') { | |
177 | var self = this; | |
178 | setTimeout(function() { self.__init__(div, file, attrs) }, 100); | |
179 | } | |
180 | ||
285a6bda DV |
181 | // Support two-argument constructor |
182 | if (attrs == null) { attrs = {}; } | |
183 | ||
6a1aa64f | 184 | // Copy the important bits into the object |
32988383 | 185 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
6a1aa64f | 186 | this.maindiv_ = div; |
6a1aa64f | 187 | this.file_ = file; |
285a6bda | 188 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
6a1aa64f | 189 | this.previousVerticalX_ = -1; |
6a1aa64f | 190 | this.fractions_ = attrs.fractions || false; |
6a1aa64f | 191 | this.dateWindow_ = attrs.dateWindow || null; |
8b83c6cc | 192 | |
6a1aa64f | 193 | this.wilsonInterval_ = attrs.wilsonInterval || true; |
fe0b7c03 | 194 | this.is_initial_draw_ = true; |
5c528fa2 | 195 | this.annotations_ = []; |
3c1d225b | 196 | this.numDigits_ = 2; |
8e4a6af3 | 197 | |
f7d6278e DV |
198 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
199 | // div, then only one will be drawn. | |
200 | div.innerHTML = ""; | |
201 | ||
c21d2c2d | 202 | // If the div isn't already sized then inherit from our attrs or |
203 | // give it a default size. | |
285a6bda | 204 | if (div.style.width == '') { |
ddd1b11f | 205 | div.style.width = (attrs.width || Dygraph.DEFAULT_WIDTH) + "px"; |
285a6bda DV |
206 | } |
207 | if (div.style.height == '') { | |
ddd1b11f | 208 | div.style.height = (attrs.height || Dygraph.DEFAULT_HEIGHT) + "px"; |
32988383 | 209 | } |
285a6bda DV |
210 | this.width_ = parseInt(div.style.width, 10); |
211 | this.height_ = parseInt(div.style.height, 10); | |
c21d2c2d | 212 | // The div might have been specified as percent of the current window size, |
213 | // convert that to an appropriate number of pixels. | |
214 | if (div.style.width.indexOf("%") == div.style.width.length - 1) { | |
c6f45033 | 215 | this.width_ = div.offsetWidth; |
c21d2c2d | 216 | } |
217 | if (div.style.height.indexOf("%") == div.style.height.length - 1) { | |
c6f45033 | 218 | this.height_ = div.offsetHeight; |
c21d2c2d | 219 | } |
32988383 | 220 | |
10a6456d DV |
221 | if (this.width_ == 0) { |
222 | this.error("dygraph has zero width. Please specify a width in pixels."); | |
223 | } | |
224 | if (this.height_ == 0) { | |
225 | this.error("dygraph has zero height. Please specify a height in pixels."); | |
226 | } | |
227 | ||
344ba8c0 | 228 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
43af96e7 NK |
229 | if (attrs['stackedGraph']) { |
230 | attrs['fillGraph'] = true; | |
231 | // TODO(nikhilk): Add any other stackedGraph checks here. | |
232 | } | |
233 | ||
285a6bda DV |
234 | // Dygraphs has many options, some of which interact with one another. |
235 | // To keep track of everything, we maintain two sets of options: | |
236 | // | |
c21d2c2d | 237 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
238 | // this.attrs_ defaults, options derived from user_attrs_, data. |
239 | // | |
240 | // Options are then accessed this.attr_('attr'), which first looks at | |
241 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
242 | // defaults without overriding behavior that the user specifically asks for. | |
243 | this.user_attrs_ = {}; | |
fc80a396 | 244 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 245 | |
285a6bda | 246 | this.attrs_ = {}; |
fc80a396 | 247 | Dygraph.update(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 248 | |
16269f6e | 249 | this.boundaryIds_ = []; |
6a1aa64f | 250 | |
285a6bda DV |
251 | // Make a note of whether labels will be pulled from the CSV file. |
252 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
6a1aa64f DV |
253 | |
254 | // Create the containing DIV and other interactive elements | |
255 | this.createInterface_(); | |
256 | ||
738fc797 | 257 | this.start_(); |
6a1aa64f DV |
258 | }; |
259 | ||
227b93cc DV |
260 | Dygraph.prototype.attr_ = function(name, seriesName) { |
261 | if (seriesName && | |
262 | typeof(this.user_attrs_[seriesName]) != 'undefined' && | |
263 | this.user_attrs_[seriesName] != null && | |
264 | typeof(this.user_attrs_[seriesName][name]) != 'undefined') { | |
265 | return this.user_attrs_[seriesName][name]; | |
450fe64b | 266 | } else if (typeof(this.user_attrs_[name]) != 'undefined') { |
285a6bda DV |
267 | return this.user_attrs_[name]; |
268 | } else if (typeof(this.attrs_[name]) != 'undefined') { | |
269 | return this.attrs_[name]; | |
270 | } else { | |
271 | return null; | |
272 | } | |
273 | }; | |
274 | ||
275 | // TODO(danvk): any way I can get the line numbers to be this.warn call? | |
276 | Dygraph.prototype.log = function(severity, message) { | |
277 | if (typeof(console) != 'undefined') { | |
278 | switch (severity) { | |
279 | case Dygraph.DEBUG: | |
280 | console.debug('dygraphs: ' + message); | |
281 | break; | |
282 | case Dygraph.INFO: | |
283 | console.info('dygraphs: ' + message); | |
284 | break; | |
285 | case Dygraph.WARNING: | |
286 | console.warn('dygraphs: ' + message); | |
287 | break; | |
288 | case Dygraph.ERROR: | |
289 | console.error('dygraphs: ' + message); | |
290 | break; | |
291 | } | |
292 | } | |
293 | } | |
294 | Dygraph.prototype.info = function(message) { | |
295 | this.log(Dygraph.INFO, message); | |
296 | } | |
297 | Dygraph.prototype.warn = function(message) { | |
298 | this.log(Dygraph.WARNING, message); | |
299 | } | |
300 | Dygraph.prototype.error = function(message) { | |
301 | this.log(Dygraph.ERROR, message); | |
302 | } | |
303 | ||
6a1aa64f DV |
304 | /** |
305 | * Returns the current rolling period, as set by the user or an option. | |
3c1d225b | 306 | * @return {Number} The number of points in the rolling window |
6a1aa64f | 307 | */ |
285a6bda | 308 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 309 | return this.rollPeriod_; |
76171648 DV |
310 | }; |
311 | ||
599fb4ad DV |
312 | /** |
313 | * Returns the currently-visible x-range. This can be affected by zooming, | |
314 | * panning or a call to updateOptions. | |
315 | * Returns a two-element array: [left, right]. | |
316 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
317 | */ | |
318 | Dygraph.prototype.xAxisRange = function() { | |
319 | if (this.dateWindow_) return this.dateWindow_; | |
320 | ||
321 | // The entire chart is visible. | |
322 | var left = this.rawData_[0][0]; | |
323 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
324 | return [left, right]; | |
325 | }; | |
326 | ||
3230c662 | 327 | /** |
d58ae307 DV |
328 | * Returns the currently-visible y-range for an axis. This can be affected by |
329 | * zooming, panning or a call to updateOptions. Axis indices are zero-based. If | |
330 | * called with no arguments, returns the range of the first axis. | |
3230c662 DV |
331 | * Returns a two-element array: [bottom, top]. |
332 | */ | |
d58ae307 | 333 | Dygraph.prototype.yAxisRange = function(idx) { |
d63e6799 | 334 | if (typeof(idx) == "undefined") idx = 0; |
d58ae307 DV |
335 | if (idx < 0 || idx >= this.axes_.length) return null; |
336 | return [ this.axes_[idx].computedValueRange[0], | |
337 | this.axes_[idx].computedValueRange[1] ]; | |
338 | }; | |
339 | ||
340 | /** | |
341 | * Returns the currently-visible y-ranges for each axis. This can be affected by | |
342 | * zooming, panning, calls to updateOptions, etc. | |
343 | * Returns an array of [bottom, top] pairs, one for each y-axis. | |
344 | */ | |
345 | Dygraph.prototype.yAxisRanges = function() { | |
346 | var ret = []; | |
347 | for (var i = 0; i < this.axes_.length; i++) { | |
348 | ret.push(this.yAxisRange(i)); | |
349 | } | |
350 | return ret; | |
3230c662 DV |
351 | }; |
352 | ||
d58ae307 | 353 | // TODO(danvk): use these functions throughout dygraphs. |
3230c662 DV |
354 | /** |
355 | * Convert from data coordinates to canvas/div X/Y coordinates. | |
d58ae307 DV |
356 | * If specified, do this conversion for the coordinate system of a particular |
357 | * axis. Uses the first axis by default. | |
3230c662 DV |
358 | * Returns a two-element array: [X, Y] |
359 | */ | |
d58ae307 | 360 | Dygraph.prototype.toDomCoords = function(x, y, axis) { |
3230c662 DV |
361 | var ret = [null, null]; |
362 | var area = this.plotter_.area; | |
363 | if (x !== null) { | |
364 | var xRange = this.xAxisRange(); | |
365 | ret[0] = area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; | |
366 | } | |
367 | ||
368 | if (y !== null) { | |
d58ae307 | 369 | var yRange = this.yAxisRange(axis); |
891ad846 | 370 | ret[1] = area.y + (yRange[1] - y) / (yRange[1] - yRange[0]) * area.h; |
3230c662 DV |
371 | } |
372 | ||
373 | return ret; | |
374 | }; | |
375 | ||
376 | /** | |
377 | * Convert from canvas/div coords to data coordinates. | |
d58ae307 DV |
378 | * If specified, do this conversion for the coordinate system of a particular |
379 | * axis. Uses the first axis by default. | |
3230c662 DV |
380 | * Returns a two-element array: [X, Y] |
381 | */ | |
d58ae307 | 382 | Dygraph.prototype.toDataCoords = function(x, y, axis) { |
3230c662 DV |
383 | var ret = [null, null]; |
384 | var area = this.plotter_.area; | |
385 | if (x !== null) { | |
386 | var xRange = this.xAxisRange(); | |
387 | ret[0] = xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); | |
388 | } | |
389 | ||
390 | if (y !== null) { | |
d58ae307 | 391 | var yRange = this.yAxisRange(axis); |
3230c662 DV |
392 | ret[1] = yRange[0] + (area.h - y) / area.h * (yRange[1] - yRange[0]); |
393 | } | |
394 | ||
395 | return ret; | |
396 | }; | |
397 | ||
e99fde05 DV |
398 | /** |
399 | * Returns the number of columns (including the independent variable). | |
400 | */ | |
401 | Dygraph.prototype.numColumns = function() { | |
402 | return this.rawData_[0].length; | |
403 | }; | |
404 | ||
405 | /** | |
406 | * Returns the number of rows (excluding any header/label row). | |
407 | */ | |
408 | Dygraph.prototype.numRows = function() { | |
409 | return this.rawData_.length; | |
410 | }; | |
411 | ||
412 | /** | |
413 | * Returns the value in the given row and column. If the row and column exceed | |
414 | * the bounds on the data, returns null. Also returns null if the value is | |
415 | * missing. | |
416 | */ | |
417 | Dygraph.prototype.getValue = function(row, col) { | |
418 | if (row < 0 || row > this.rawData_.length) return null; | |
419 | if (col < 0 || col > this.rawData_[row].length) return null; | |
420 | ||
421 | return this.rawData_[row][col]; | |
422 | }; | |
423 | ||
76171648 DV |
424 | Dygraph.addEvent = function(el, evt, fn) { |
425 | var normed_fn = function(e) { | |
426 | if (!e) var e = window.event; | |
427 | fn(e); | |
428 | }; | |
429 | if (window.addEventListener) { // Mozilla, Netscape, Firefox | |
430 | el.addEventListener(evt, normed_fn, false); | |
431 | } else { // IE | |
432 | el.attachEvent('on' + evt, normed_fn); | |
433 | } | |
434 | }; | |
6a1aa64f DV |
435 | |
436 | /** | |
285a6bda | 437 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 438 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 439 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
440 | * @private |
441 | */ | |
285a6bda | 442 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
443 | // Create the all-enclosing graph div |
444 | var enclosing = this.maindiv_; | |
445 | ||
b0c3b730 DV |
446 | this.graphDiv = document.createElement("div"); |
447 | this.graphDiv.style.width = this.width_ + "px"; | |
448 | this.graphDiv.style.height = this.height_ + "px"; | |
449 | enclosing.appendChild(this.graphDiv); | |
450 | ||
451 | // Create the canvas for interactive parts of the chart. | |
f8cfec73 | 452 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 DV |
453 | this.canvas_.style.position = "absolute"; |
454 | this.canvas_.width = this.width_; | |
455 | this.canvas_.height = this.height_; | |
f8cfec73 DV |
456 | this.canvas_.style.width = this.width_ + "px"; // for IE |
457 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
b0c3b730 DV |
458 | |
459 | // ... and for static parts of the chart. | |
6a1aa64f | 460 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
76171648 | 461 | |
eb7bf005 EC |
462 | // The interactive parts of the graph are drawn on top of the chart. |
463 | this.graphDiv.appendChild(this.hidden_); | |
464 | this.graphDiv.appendChild(this.canvas_); | |
465 | this.mouseEventElement_ = this.canvas_; | |
466 | ||
76171648 | 467 | var dygraph = this; |
eb7bf005 | 468 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(e) { |
76171648 DV |
469 | dygraph.mouseMove_(e); |
470 | }); | |
eb7bf005 | 471 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(e) { |
76171648 DV |
472 | dygraph.mouseOut_(e); |
473 | }); | |
697e70b2 DV |
474 | |
475 | // Create the grapher | |
476 | // TODO(danvk): why does the Layout need its own set of options? | |
477 | this.layoutOptions_ = { 'xOriginIsZero': false }; | |
478 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
479 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
480 | Dygraph.update(this.layoutOptions_, { | |
481 | 'errorBars': (this.attr_("errorBars") || this.attr_("customBars")) }); | |
482 | ||
483 | this.layout_ = new DygraphLayout(this, this.layoutOptions_); | |
484 | ||
485 | // TODO(danvk): why does the Renderer need its own set of options? | |
486 | this.renderOptions_ = { colorScheme: this.colors_, | |
487 | strokeColor: null, | |
488 | axisLineWidth: Dygraph.AXIS_LINE_WIDTH }; | |
489 | Dygraph.update(this.renderOptions_, this.attrs_); | |
490 | Dygraph.update(this.renderOptions_, this.user_attrs_); | |
697e70b2 DV |
491 | |
492 | this.createStatusMessage_(); | |
697e70b2 | 493 | this.createDragInterface_(); |
4cfcc38c DV |
494 | }; |
495 | ||
496 | /** | |
497 | * Detach DOM elements in the dygraph and null out all data references. | |
498 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
499 | * usage. See, e.g., the tests/perf.html example. | |
500 | */ | |
501 | Dygraph.prototype.destroy = function() { | |
502 | var removeRecursive = function(node) { | |
503 | while (node.hasChildNodes()) { | |
504 | removeRecursive(node.firstChild); | |
505 | node.removeChild(node.firstChild); | |
506 | } | |
507 | }; | |
508 | removeRecursive(this.maindiv_); | |
509 | ||
510 | var nullOut = function(obj) { | |
511 | for (var n in obj) { | |
512 | if (typeof(obj[n]) === 'object') { | |
513 | obj[n] = null; | |
514 | } | |
515 | } | |
516 | }; | |
517 | ||
518 | // These may not all be necessary, but it can't hurt... | |
519 | nullOut(this.layout_); | |
520 | nullOut(this.plotter_); | |
521 | nullOut(this); | |
522 | }; | |
6a1aa64f DV |
523 | |
524 | /** | |
525 | * Creates the canvas containing the PlotKit graph. Only plotkit ever draws on | |
285a6bda | 526 | * this particular canvas. All Dygraph work is done on this.canvas_. |
8846615a | 527 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
528 | * @return {Object} The newly-created canvas |
529 | * @private | |
530 | */ | |
285a6bda | 531 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 | 532 | var h = Dygraph.createCanvas(); |
6a1aa64f | 533 | h.style.position = "absolute"; |
9ac5e4ae DV |
534 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
535 | // some extra area to make it easier to zoom in on the far left and far | |
536 | // right. h needs to be precisely the plot area, so that clipping occurs. | |
6a1aa64f DV |
537 | h.style.top = canvas.style.top; |
538 | h.style.left = canvas.style.left; | |
539 | h.width = this.width_; | |
540 | h.height = this.height_; | |
f8cfec73 DV |
541 | h.style.width = this.width_ + "px"; // for IE |
542 | h.style.height = this.height_ + "px"; // for IE | |
6a1aa64f DV |
543 | return h; |
544 | }; | |
545 | ||
f474c2a3 DV |
546 | // Taken from MochiKit.Color |
547 | Dygraph.hsvToRGB = function (hue, saturation, value) { | |
548 | var red; | |
549 | var green; | |
550 | var blue; | |
551 | if (saturation === 0) { | |
552 | red = value; | |
553 | green = value; | |
554 | blue = value; | |
555 | } else { | |
556 | var i = Math.floor(hue * 6); | |
557 | var f = (hue * 6) - i; | |
558 | var p = value * (1 - saturation); | |
559 | var q = value * (1 - (saturation * f)); | |
560 | var t = value * (1 - (saturation * (1 - f))); | |
561 | switch (i) { | |
562 | case 1: red = q; green = value; blue = p; break; | |
563 | case 2: red = p; green = value; blue = t; break; | |
564 | case 3: red = p; green = q; blue = value; break; | |
565 | case 4: red = t; green = p; blue = value; break; | |
566 | case 5: red = value; green = p; blue = q; break; | |
567 | case 6: // fall through | |
568 | case 0: red = value; green = t; blue = p; break; | |
569 | } | |
570 | } | |
571 | red = Math.floor(255 * red + 0.5); | |
572 | green = Math.floor(255 * green + 0.5); | |
573 | blue = Math.floor(255 * blue + 0.5); | |
574 | return 'rgb(' + red + ',' + green + ',' + blue + ')'; | |
575 | }; | |
576 | ||
577 | ||
6a1aa64f DV |
578 | /** |
579 | * Generate a set of distinct colors for the data series. This is done with a | |
580 | * color wheel. Saturation/Value are customizable, and the hue is | |
581 | * equally-spaced around the color wheel. If a custom set of colors is | |
582 | * specified, that is used instead. | |
6a1aa64f DV |
583 | * @private |
584 | */ | |
285a6bda DV |
585 | Dygraph.prototype.setColors_ = function() { |
586 | // TODO(danvk): compute this directly into this.attrs_['colorScheme'] and do | |
587 | // away with this.renderOptions_. | |
588 | var num = this.attr_("labels").length - 1; | |
6a1aa64f | 589 | this.colors_ = []; |
285a6bda DV |
590 | var colors = this.attr_('colors'); |
591 | if (!colors) { | |
592 | var sat = this.attr_('colorSaturation') || 1.0; | |
593 | var val = this.attr_('colorValue') || 0.5; | |
2aa21213 | 594 | var half = Math.ceil(num / 2); |
6a1aa64f | 595 | for (var i = 1; i <= num; i++) { |
ec1959eb | 596 | if (!this.visibility()[i-1]) continue; |
43af96e7 | 597 | // alternate colors for high contrast. |
2aa21213 | 598 | var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2); |
43af96e7 NK |
599 | var hue = (1.0 * idx/ (1 + num)); |
600 | this.colors_.push(Dygraph.hsvToRGB(hue, sat, val)); | |
6a1aa64f DV |
601 | } |
602 | } else { | |
603 | for (var i = 0; i < num; i++) { | |
ec1959eb | 604 | if (!this.visibility()[i]) continue; |
285a6bda | 605 | var colorStr = colors[i % colors.length]; |
f474c2a3 | 606 | this.colors_.push(colorStr); |
6a1aa64f DV |
607 | } |
608 | } | |
285a6bda | 609 | |
c21d2c2d | 610 | // TODO(danvk): update this w/r/t/ the new options system. |
285a6bda | 611 | this.renderOptions_.colorScheme = this.colors_; |
fc80a396 DV |
612 | Dygraph.update(this.plotter_.options, this.renderOptions_); |
613 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
614 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
6a1aa64f DV |
615 | } |
616 | ||
43af96e7 NK |
617 | /** |
618 | * Return the list of colors. This is either the list of colors passed in the | |
619 | * attributes, or the autogenerated list of rgb(r,g,b) strings. | |
620 | * @return {Array<string>} The list of colors. | |
621 | */ | |
622 | Dygraph.prototype.getColors = function() { | |
623 | return this.colors_; | |
624 | }; | |
625 | ||
5e60386d DV |
626 | // The following functions are from quirksmode.org with a modification for Safari from |
627 | // http://blog.firetree.net/2005/07/04/javascript-find-position/ | |
3df0ccf0 DV |
628 | // http://www.quirksmode.org/js/findpos.html |
629 | Dygraph.findPosX = function(obj) { | |
630 | var curleft = 0; | |
5e60386d | 631 | if(obj.offsetParent) |
50360fd0 | 632 | while(1) |
5e60386d | 633 | { |
3df0ccf0 | 634 | curleft += obj.offsetLeft; |
5e60386d DV |
635 | if(!obj.offsetParent) |
636 | break; | |
3df0ccf0 DV |
637 | obj = obj.offsetParent; |
638 | } | |
5e60386d | 639 | else if(obj.x) |
3df0ccf0 DV |
640 | curleft += obj.x; |
641 | return curleft; | |
642 | }; | |
c21d2c2d | 643 | |
3df0ccf0 DV |
644 | Dygraph.findPosY = function(obj) { |
645 | var curtop = 0; | |
5e60386d DV |
646 | if(obj.offsetParent) |
647 | while(1) | |
648 | { | |
3df0ccf0 | 649 | curtop += obj.offsetTop; |
5e60386d DV |
650 | if(!obj.offsetParent) |
651 | break; | |
3df0ccf0 DV |
652 | obj = obj.offsetParent; |
653 | } | |
5e60386d | 654 | else if(obj.y) |
3df0ccf0 DV |
655 | curtop += obj.y; |
656 | return curtop; | |
657 | }; | |
658 | ||
5e60386d | 659 | |
71a11a8e | 660 | |
6a1aa64f DV |
661 | /** |
662 | * Create the div that contains information on the selected point(s) | |
663 | * This goes in the top right of the canvas, unless an external div has already | |
664 | * been specified. | |
665 | * @private | |
666 | */ | |
fedbd797 | 667 | Dygraph.prototype.createStatusMessage_ = function() { |
668 | var userLabelsDiv = this.user_attrs_["labelsDiv"]; | |
669 | if (userLabelsDiv && null != userLabelsDiv | |
670 | && (typeof(userLabelsDiv) == "string" || userLabelsDiv instanceof String)) { | |
671 | this.user_attrs_["labelsDiv"] = document.getElementById(userLabelsDiv); | |
672 | } | |
285a6bda DV |
673 | if (!this.attr_("labelsDiv")) { |
674 | var divWidth = this.attr_('labelsDivWidth'); | |
b0c3b730 | 675 | var messagestyle = { |
6a1aa64f DV |
676 | "position": "absolute", |
677 | "fontSize": "14px", | |
678 | "zIndex": 10, | |
679 | "width": divWidth + "px", | |
680 | "top": "0px", | |
8846615a | 681 | "left": (this.width_ - divWidth - 2) + "px", |
6a1aa64f DV |
682 | "background": "white", |
683 | "textAlign": "left", | |
b0c3b730 | 684 | "overflow": "hidden"}; |
fc80a396 | 685 | Dygraph.update(messagestyle, this.attr_('labelsDivStyles')); |
b0c3b730 DV |
686 | var div = document.createElement("div"); |
687 | for (var name in messagestyle) { | |
85b99f0b DV |
688 | if (messagestyle.hasOwnProperty(name)) { |
689 | div.style[name] = messagestyle[name]; | |
690 | } | |
b0c3b730 DV |
691 | } |
692 | this.graphDiv.appendChild(div); | |
285a6bda | 693 | this.attrs_.labelsDiv = div; |
6a1aa64f DV |
694 | } |
695 | }; | |
696 | ||
697 | /** | |
0abfbd7e DV |
698 | * Position the labels div so that its right edge is flush with the right edge |
699 | * of the charting area. | |
700 | */ | |
701 | Dygraph.prototype.positionLabelsDiv_ = function() { | |
702 | // Don't touch a user-specified labelsDiv. | |
703 | if (this.user_attrs_.hasOwnProperty("labelsDiv")) return; | |
704 | ||
705 | var area = this.plotter_.area; | |
706 | var div = this.attr_("labelsDiv"); | |
8c21adcf | 707 | div.style.left = area.x + area.w - this.attr_("labelsDivWidth") - 1 + "px"; |
0abfbd7e DV |
708 | }; |
709 | ||
710 | /** | |
6a1aa64f | 711 | * Create the text box to adjust the averaging period |
6a1aa64f DV |
712 | * @private |
713 | */ | |
285a6bda | 714 | Dygraph.prototype.createRollInterface_ = function() { |
8c69de65 DV |
715 | // Create a roller if one doesn't exist already. |
716 | if (!this.roller_) { | |
717 | this.roller_ = document.createElement("input"); | |
718 | this.roller_.type = "text"; | |
719 | this.roller_.style.display = "none"; | |
720 | this.graphDiv.appendChild(this.roller_); | |
721 | } | |
722 | ||
723 | var display = this.attr_('showRoller') ? 'block' : 'none'; | |
26ca7938 | 724 | |
b0c3b730 DV |
725 | var textAttr = { "position": "absolute", |
726 | "zIndex": 10, | |
727 | "top": (this.plotter_.area.h - 25) + "px", | |
728 | "left": (this.plotter_.area.x + 1) + "px", | |
729 | "display": display | |
6a1aa64f | 730 | }; |
8c69de65 DV |
731 | this.roller_.size = "2"; |
732 | this.roller_.value = this.rollPeriod_; | |
b0c3b730 | 733 | for (var name in textAttr) { |
85b99f0b | 734 | if (textAttr.hasOwnProperty(name)) { |
8c69de65 | 735 | this.roller_.style[name] = textAttr[name]; |
85b99f0b | 736 | } |
b0c3b730 DV |
737 | } |
738 | ||
76171648 | 739 | var dygraph = this; |
8c69de65 | 740 | this.roller_.onchange = function() { dygraph.adjustRoll(dygraph.roller_.value); }; |
76171648 DV |
741 | }; |
742 | ||
743 | // These functions are taken from MochiKit.Signal | |
744 | Dygraph.pageX = function(e) { | |
745 | if (e.pageX) { | |
746 | return (!e.pageX || e.pageX < 0) ? 0 : e.pageX; | |
747 | } else { | |
748 | var de = document; | |
749 | var b = document.body; | |
750 | return e.clientX + | |
751 | (de.scrollLeft || b.scrollLeft) - | |
752 | (de.clientLeft || 0); | |
753 | } | |
754 | }; | |
755 | ||
756 | Dygraph.pageY = function(e) { | |
757 | if (e.pageY) { | |
758 | return (!e.pageY || e.pageY < 0) ? 0 : e.pageY; | |
759 | } else { | |
760 | var de = document; | |
761 | var b = document.body; | |
762 | return e.clientY + | |
763 | (de.scrollTop || b.scrollTop) - | |
764 | (de.clientTop || 0); | |
765 | } | |
766 | }; | |
6a1aa64f DV |
767 | |
768 | /** | |
769 | * Set up all the mouse handlers needed to capture dragging behavior for zoom | |
27385109 | 770 | * events. |
6a1aa64f DV |
771 | * @private |
772 | */ | |
285a6bda | 773 | Dygraph.prototype.createDragInterface_ = function() { |
6a1aa64f DV |
774 | var self = this; |
775 | ||
776 | // Tracks whether the mouse is down right now | |
bce01b0f | 777 | var isZooming = false; |
d58ae307 DV |
778 | var isPanning = false; // is this drag part of a pan? |
779 | var is2DPan = false; // if so, is that pan 1- or 2-dimensional? | |
6a1aa64f DV |
780 | var dragStartX = null; |
781 | var dragStartY = null; | |
782 | var dragEndX = null; | |
783 | var dragEndY = null; | |
eeab5025 | 784 | var dragDirection = null; |
6a1aa64f | 785 | var prevEndX = null; |
8b83c6cc RK |
786 | var prevEndY = null; |
787 | var prevDragDirection = null; | |
e3489f4f | 788 | |
d58ae307 | 789 | // TODO(danvk): update this comment |
e3489f4f RK |
790 | // draggingDate and draggingValue represent the [date,value] point on the |
791 | // graph at which the mouse was pressed. As the mouse moves while panning, | |
792 | // the viewport must pan so that the mouse position points to | |
793 | // [draggingDate, draggingValue] | |
bce01b0f | 794 | var draggingDate = null; |
e3489f4f | 795 | |
d58ae307 | 796 | // TODO(danvk): update this comment |
e3489f4f RK |
797 | // The range in second/value units that the viewport encompasses during a |
798 | // panning operation. | |
bce01b0f | 799 | var dateRange = null; |
6a1aa64f DV |
800 | |
801 | // Utility function to convert page-wide coordinates to canvas coords | |
67e650dc DV |
802 | var px = 0; |
803 | var py = 0; | |
76171648 | 804 | var getX = function(e) { return Dygraph.pageX(e) - px }; |
1e1bf7df | 805 | var getY = function(e) { return Dygraph.pageY(e) - py }; |
6a1aa64f DV |
806 | |
807 | // Draw zoom rectangles when the mouse is down and the user moves around | |
eb7bf005 | 808 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(event) { |
bce01b0f | 809 | if (isZooming) { |
6a1aa64f DV |
810 | dragEndX = getX(event); |
811 | dragEndY = getY(event); | |
812 | ||
8b83c6cc RK |
813 | var xDelta = Math.abs(dragStartX - dragEndX); |
814 | var yDelta = Math.abs(dragStartY - dragEndY); | |
8b211dd6 RK |
815 | |
816 | // drag direction threshold for y axis is twice as large as x axis | |
eeab5025 | 817 | dragDirection = (xDelta < yDelta / 2) ? Dygraph.VERTICAL : Dygraph.HORIZONTAL; |
8b83c6cc RK |
818 | |
819 | self.drawZoomRect_(dragDirection, dragStartX, dragEndX, dragStartY, dragEndY, | |
820 | prevDragDirection, prevEndX, prevEndY); | |
821 | ||
6a1aa64f | 822 | prevEndX = dragEndX; |
8b83c6cc RK |
823 | prevEndY = dragEndY; |
824 | prevDragDirection = dragDirection; | |
bce01b0f DV |
825 | } else if (isPanning) { |
826 | dragEndX = getX(event); | |
827 | dragEndY = getY(event); | |
828 | ||
d58ae307 | 829 | // TODO(danvk): update this comment |
bce01b0f | 830 | // Want to have it so that: |
e3489f4f | 831 | // 1. draggingDate appears at dragEndX, draggingValue appears at dragEndY. |
bce01b0f | 832 | // 2. daterange = (dateWindow_[1] - dateWindow_[0]) is unaltered. |
e3489f4f RK |
833 | // 3. draggingValue appears at dragEndY. |
834 | // 4. valueRange is unaltered. | |
835 | ||
836 | var minDate = draggingDate - (dragEndX / self.width_) * dateRange; | |
837 | var maxDate = minDate + dateRange; | |
838 | self.dateWindow_ = [minDate, maxDate]; | |
bce01b0f | 839 | |
ef0b205b | 840 | |
d58ae307 DV |
841 | // y-axis scaling is automatic unless this is a full 2D pan. |
842 | if (is2DPan) { | |
843 | // Adjust each axis appropriately. | |
844 | var y_frac = dragEndY / self.height_; | |
845 | for (var i = 0; i < self.axes_.length; i++) { | |
846 | var axis = self.axes_[i]; | |
847 | var maxValue = axis.draggingValue + y_frac * axis.dragValueRange; | |
848 | var minValue = maxValue - axis.dragValueRange; | |
849 | axis.valueWindow = [ minValue, maxValue ]; | |
850 | } | |
74f09e22 | 851 | } |
bce01b0f | 852 | |
26ca7938 | 853 | self.drawGraph_(); |
6a1aa64f DV |
854 | } |
855 | }); | |
856 | ||
857 | // Track the beginning of drag events | |
eb7bf005 | 858 | Dygraph.addEvent(this.mouseEventElement_, 'mousedown', function(event) { |
79b3ee42 DV |
859 | // prevents mouse drags from selecting page text. |
860 | if (event.preventDefault) { | |
861 | event.preventDefault(); // Firefox, Chrome, etc. | |
862 | } else { | |
863 | event.returnValue = false; // IE | |
864 | event.cancelBubble = true; | |
865 | } | |
866 | ||
3df0ccf0 DV |
867 | px = Dygraph.findPosX(self.canvas_); |
868 | py = Dygraph.findPosY(self.canvas_); | |
6a1aa64f DV |
869 | dragStartX = getX(event); |
870 | dragStartY = getY(event); | |
bce01b0f | 871 | |
2dab69c3 | 872 | if (event.altKey || event.shiftKey) { |
e3489f4f | 873 | // have to be zoomed in to pan. |
d58ae307 DV |
874 | var zoomedY = false; |
875 | for (var i = 0; i < self.axes_.length; i++) { | |
876 | if (self.axes_[i].valueWindow || self.axes_[i].valueRange) { | |
877 | zoomedY = true; | |
878 | break; | |
879 | } | |
880 | } | |
881 | if (!self.dateWindow_ && !zoomedY) return; | |
e3489f4f | 882 | |
bce01b0f | 883 | isPanning = true; |
e3489f4f RK |
884 | var xRange = self.xAxisRange(); |
885 | dateRange = xRange[1] - xRange[0]; | |
d58ae307 DV |
886 | |
887 | // Record the range of each y-axis at the start of the drag. | |
888 | // If any axis has a valueRange or valueWindow, then we want a 2D pan. | |
889 | is2DPan = false; | |
890 | for (var i = 0; i < self.axes_.length; i++) { | |
891 | var axis = self.axes_[i]; | |
892 | var yRange = self.yAxisRange(i); | |
893 | axis.dragValueRange = yRange[1] - yRange[0]; | |
894 | var r = self.toDataCoords(null, dragStartY, i); | |
895 | axis.draggingValue = r[1]; | |
896 | if (axis.valueWindow || axis.valueRange) is2DPan = true; | |
897 | } | |
e3489f4f RK |
898 | |
899 | // TODO(konigsberg): Switch from all this math to toDataCoords? | |
900 | // Seems to work for the dragging value. | |
d58ae307 | 901 | draggingDate = (dragStartX / self.width_) * dateRange + xRange[0]; |
bce01b0f DV |
902 | } else { |
903 | isZooming = true; | |
904 | } | |
6a1aa64f DV |
905 | }); |
906 | ||
907 | // If the user releases the mouse button during a drag, but not over the | |
908 | // canvas, then it doesn't count as a zooming action. | |
76171648 | 909 | Dygraph.addEvent(document, 'mouseup', function(event) { |
bce01b0f DV |
910 | if (isZooming || isPanning) { |
911 | isZooming = false; | |
6a1aa64f DV |
912 | dragStartX = null; |
913 | dragStartY = null; | |
914 | } | |
bce01b0f DV |
915 | |
916 | if (isPanning) { | |
917 | isPanning = false; | |
918 | draggingDate = null; | |
919 | dateRange = null; | |
d58ae307 | 920 | for (var i = 0; i < self.axes_.length; i++) { |
d63e6799 DV |
921 | delete self.axes_[i].draggingValue; |
922 | delete self.axes_[i].dragValueRange; | |
d58ae307 | 923 | } |
bce01b0f | 924 | } |
6a1aa64f DV |
925 | }); |
926 | ||
927 | // Temporarily cancel the dragging event when the mouse leaves the graph | |
eb7bf005 | 928 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(event) { |
bce01b0f | 929 | if (isZooming) { |
6a1aa64f DV |
930 | dragEndX = null; |
931 | dragEndY = null; | |
932 | } | |
933 | }); | |
934 | ||
935 | // If the mouse is released on the canvas during a drag event, then it's a | |
936 | // zoom. Only do the zoom if it's over a large enough area (>= 10 pixels) | |
eb7bf005 | 937 | Dygraph.addEvent(this.mouseEventElement_, 'mouseup', function(event) { |
bce01b0f DV |
938 | if (isZooming) { |
939 | isZooming = false; | |
6a1aa64f DV |
940 | dragEndX = getX(event); |
941 | dragEndY = getY(event); | |
942 | var regionWidth = Math.abs(dragEndX - dragStartX); | |
943 | var regionHeight = Math.abs(dragEndY - dragStartY); | |
944 | ||
e2b5f2bc DV |
945 | if (regionWidth < 2 && regionHeight < 2 && |
946 | self.lastx_ != undefined && self.lastx_ != -1) { | |
2ad87eaa | 947 | // TODO(danvk): pass along more info about the points, e.g. 'x' |
1e1bf7df | 948 | if (self.attr_('clickCallback') != null) { |
1e1bf7df DV |
949 | self.attr_('clickCallback')(event, self.lastx_, self.selPoints_); |
950 | } | |
951 | if (self.attr_('pointClickCallback')) { | |
952 | // check if the click was on a particular point. | |
953 | var closestIdx = -1; | |
954 | var closestDistance = 0; | |
955 | for (var i = 0; i < self.selPoints_.length; i++) { | |
956 | var p = self.selPoints_[i]; | |
957 | var distance = Math.pow(p.canvasx - dragEndX, 2) + | |
958 | Math.pow(p.canvasy - dragEndY, 2); | |
959 | if (closestIdx == -1 || distance < closestDistance) { | |
960 | closestDistance = distance; | |
961 | closestIdx = i; | |
962 | } | |
963 | } | |
964 | ||
965 | // Allow any click within two pixels of the dot. | |
2ad87eaa | 966 | var radius = self.attr_('highlightCircleSize') + 2; |
1e1bf7df DV |
967 | if (closestDistance <= 5 * 5) { |
968 | self.attr_('pointClickCallback')(event, self.selPoints_[closestIdx]); | |
969 | } | |
970 | } | |
6a1aa64f DV |
971 | } |
972 | ||
eeab5025 | 973 | if (regionWidth >= 10 && dragDirection == Dygraph.HORIZONTAL) { |
8b83c6cc | 974 | self.doZoomX_(Math.min(dragStartX, dragEndX), |
6a1aa64f | 975 | Math.max(dragStartX, dragEndX)); |
eeab5025 | 976 | } else if (regionHeight >= 10 && dragDirection == Dygraph.VERTICAL){ |
8b83c6cc RK |
977 | self.doZoomY_(Math.min(dragStartY, dragEndY), |
978 | Math.max(dragStartY, dragEndY)); | |
6a1aa64f DV |
979 | } else { |
980 | self.canvas_.getContext("2d").clearRect(0, 0, | |
981 | self.canvas_.width, | |
982 | self.canvas_.height); | |
983 | } | |
984 | ||
985 | dragStartX = null; | |
986 | dragStartY = null; | |
987 | } | |
bce01b0f DV |
988 | |
989 | if (isPanning) { | |
990 | isPanning = false; | |
d58ae307 | 991 | is2DPan = false; |
bce01b0f DV |
992 | draggingDate = null; |
993 | dateRange = null; | |
e3489f4f | 994 | valueRange = null; |
bce01b0f | 995 | } |
6a1aa64f DV |
996 | }); |
997 | ||
998 | // Double-clicking zooms back out | |
eb7bf005 | 999 | Dygraph.addEvent(this.mouseEventElement_, 'dblclick', function(event) { |
8b83c6cc RK |
1000 | // Disable zooming out if panning. |
1001 | if (event.altKey || event.shiftKey) return; | |
1002 | ||
1003 | self.doUnzoom_(); | |
6a1aa64f DV |
1004 | }); |
1005 | }; | |
1006 | ||
1007 | /** | |
1008 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
1009 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
1010 | * avoid extra redrawing, but it's tricky to avoid interactions with the status | |
1011 | * dots. | |
8b83c6cc | 1012 | * |
39b0e098 RK |
1013 | * @param {Number} direction the direction of the zoom rectangle. Acceptable |
1014 | * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL. | |
6a1aa64f DV |
1015 | * @param {Number} startX The X position where the drag started, in canvas |
1016 | * coordinates. | |
1017 | * @param {Number} endX The current X position of the drag, in canvas coords. | |
8b83c6cc RK |
1018 | * @param {Number} startY The Y position where the drag started, in canvas |
1019 | * coordinates. | |
1020 | * @param {Number} endY The current Y position of the drag, in canvas coords. | |
39b0e098 | 1021 | * @param {Number} prevDirection the value of direction on the previous call to |
8b83c6cc | 1022 | * this function. Used to avoid excess redrawing |
6a1aa64f DV |
1023 | * @param {Number} prevEndX The value of endX on the previous call to this |
1024 | * function. Used to avoid excess redrawing | |
8b83c6cc RK |
1025 | * @param {Number} prevEndY The value of endY on the previous call to this |
1026 | * function. Used to avoid excess redrawing | |
6a1aa64f DV |
1027 | * @private |
1028 | */ | |
8b83c6cc RK |
1029 | Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY, endY, |
1030 | prevDirection, prevEndX, prevEndY) { | |
6a1aa64f DV |
1031 | var ctx = this.canvas_.getContext("2d"); |
1032 | ||
1033 | // Clean up from the previous rect if necessary | |
39b0e098 | 1034 | if (prevDirection == Dygraph.HORIZONTAL) { |
6a1aa64f DV |
1035 | ctx.clearRect(Math.min(startX, prevEndX), 0, |
1036 | Math.abs(startX - prevEndX), this.height_); | |
39b0e098 | 1037 | } else if (prevDirection == Dygraph.VERTICAL){ |
8b83c6cc RK |
1038 | ctx.clearRect(0, Math.min(startY, prevEndY), |
1039 | this.width_, Math.abs(startY - prevEndY)); | |
6a1aa64f DV |
1040 | } |
1041 | ||
1042 | // Draw a light-grey rectangle to show the new viewing area | |
39b0e098 | 1043 | if (direction == Dygraph.HORIZONTAL) { |
8b83c6cc RK |
1044 | if (endX && startX) { |
1045 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
1046 | ctx.fillRect(Math.min(startX, endX), 0, | |
1047 | Math.abs(endX - startX), this.height_); | |
1048 | } | |
1049 | } | |
39b0e098 | 1050 | if (direction == Dygraph.VERTICAL) { |
8b83c6cc RK |
1051 | if (endY && startY) { |
1052 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
1053 | ctx.fillRect(0, Math.min(startY, endY), | |
1054 | this.width_, Math.abs(endY - startY)); | |
1055 | } | |
6a1aa64f DV |
1056 | } |
1057 | }; | |
1058 | ||
1059 | /** | |
8b83c6cc RK |
1060 | * Zoom to something containing [lowX, highX]. These are pixel coordinates in |
1061 | * the canvas. The exact zoom window may be slightly larger if there are no data | |
1062 | * points near lowX or highX. Don't confuse this function with doZoomXDates, | |
1063 | * which accepts dates that match the raw data. This function redraws the graph. | |
d58ae307 | 1064 | * |
6a1aa64f DV |
1065 | * @param {Number} lowX The leftmost pixel value that should be visible. |
1066 | * @param {Number} highX The rightmost pixel value that should be visible. | |
1067 | * @private | |
1068 | */ | |
8b83c6cc | 1069 | Dygraph.prototype.doZoomX_ = function(lowX, highX) { |
6a1aa64f | 1070 | // Find the earliest and latest dates contained in this canvasx range. |
8b83c6cc | 1071 | // Convert the call to date ranges of the raw data. |
56623f3b DV |
1072 | var r = this.toDataCoords(lowX, null); |
1073 | var minDate = r[0]; | |
1074 | r = this.toDataCoords(highX, null); | |
1075 | var maxDate = r[0]; | |
8b83c6cc RK |
1076 | this.doZoomXDates_(minDate, maxDate); |
1077 | }; | |
6a1aa64f | 1078 | |
8b83c6cc RK |
1079 | /** |
1080 | * Zoom to something containing [minDate, maxDate] values. Don't confuse this | |
1081 | * method with doZoomX which accepts pixel coordinates. This function redraws | |
1082 | * the graph. | |
d58ae307 | 1083 | * |
8b83c6cc RK |
1084 | * @param {Number} minDate The minimum date that should be visible. |
1085 | * @param {Number} maxDate The maximum date that should be visible. | |
1086 | * @private | |
1087 | */ | |
1088 | Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) { | |
6a1aa64f | 1089 | this.dateWindow_ = [minDate, maxDate]; |
26ca7938 | 1090 | this.drawGraph_(); |
285a6bda | 1091 | if (this.attr_("zoomCallback")) { |
ac139d19 | 1092 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); |
8b83c6cc RK |
1093 | } |
1094 | }; | |
1095 | ||
1096 | /** | |
1097 | * Zoom to something containing [lowY, highY]. These are pixel coordinates in | |
d58ae307 DV |
1098 | * the canvas. This function redraws the graph. |
1099 | * | |
8b83c6cc RK |
1100 | * @param {Number} lowY The topmost pixel value that should be visible. |
1101 | * @param {Number} highY The lowest pixel value that should be visible. | |
1102 | * @private | |
1103 | */ | |
1104 | Dygraph.prototype.doZoomY_ = function(lowY, highY) { | |
d58ae307 DV |
1105 | // Find the highest and lowest values in pixel range for each axis. |
1106 | // Note that lowY (in pixels) corresponds to the max Value (in data coords). | |
1107 | // This is because pixels increase as you go down on the screen, whereas data | |
1108 | // coordinates increase as you go up the screen. | |
1109 | var valueRanges = []; | |
1110 | for (var i = 0; i < this.axes_.length; i++) { | |
1111 | var hi = this.toDataCoords(null, lowY, i); | |
1112 | var low = this.toDataCoords(null, highY, i); | |
1113 | this.axes_[i].valueWindow = [low[1], hi[1]]; | |
1114 | valueRanges.push([low[1], hi[1]]); | |
1115 | } | |
8b83c6cc | 1116 | |
66c380c4 | 1117 | this.drawGraph_(); |
8b83c6cc | 1118 | if (this.attr_("zoomCallback")) { |
d58ae307 DV |
1119 | var xRange = this.xAxisRange(); |
1120 | this.attr_("zoomCallback")(xRange[0], xRange[1], this.yAxisRanges()); | |
8b83c6cc RK |
1121 | } |
1122 | }; | |
1123 | ||
1124 | /** | |
1125 | * Reset the zoom to the original view coordinates. This is the same as | |
1126 | * double-clicking on the graph. | |
d58ae307 | 1127 | * |
8b83c6cc RK |
1128 | * @private |
1129 | */ | |
1130 | Dygraph.prototype.doUnzoom_ = function() { | |
d58ae307 | 1131 | var dirty = false; |
8b83c6cc | 1132 | if (this.dateWindow_ != null) { |
d58ae307 | 1133 | dirty = true; |
8b83c6cc RK |
1134 | this.dateWindow_ = null; |
1135 | } | |
d58ae307 DV |
1136 | |
1137 | for (var i = 0; i < this.axes_.length; i++) { | |
1138 | if (this.axes_[i].valueWindow != null) { | |
1139 | dirty = true; | |
1140 | delete this.axes_[i].valueWindow; | |
1141 | } | |
8b83c6cc RK |
1142 | } |
1143 | ||
1144 | if (dirty) { | |
437c0979 RK |
1145 | // Putting the drawing operation before the callback because it resets |
1146 | // yAxisRange. | |
66c380c4 | 1147 | this.drawGraph_(); |
8b83c6cc RK |
1148 | if (this.attr_("zoomCallback")) { |
1149 | var minDate = this.rawData_[0][0]; | |
1150 | var maxDate = this.rawData_[this.rawData_.length - 1][0]; | |
d58ae307 | 1151 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); |
8b83c6cc | 1152 | } |
67e650dc | 1153 | } |
6a1aa64f DV |
1154 | }; |
1155 | ||
1156 | /** | |
1157 | * When the mouse moves in the canvas, display information about a nearby data | |
1158 | * point and draw dots over those points in the data series. This function | |
1159 | * takes care of cleanup of previously-drawn dots. | |
1160 | * @param {Object} event The mousemove event from the browser. | |
1161 | * @private | |
1162 | */ | |
285a6bda | 1163 | Dygraph.prototype.mouseMove_ = function(event) { |
eb7bf005 | 1164 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_); |
6a1aa64f DV |
1165 | var points = this.layout_.points; |
1166 | ||
1167 | var lastx = -1; | |
1168 | var lasty = -1; | |
1169 | ||
1170 | // Loop through all the points and find the date nearest to our current | |
1171 | // location. | |
1172 | var minDist = 1e+100; | |
1173 | var idx = -1; | |
1174 | for (var i = 0; i < points.length; i++) { | |
8a7cc60e RK |
1175 | var point = points[i]; |
1176 | if (point == null) continue; | |
6a1aa64f | 1177 | var dist = Math.abs(points[i].canvasx - canvasx); |
f032c51d | 1178 | if (dist > minDist) continue; |
6a1aa64f DV |
1179 | minDist = dist; |
1180 | idx = i; | |
1181 | } | |
1182 | if (idx >= 0) lastx = points[idx].xval; | |
1183 | // Check that you can really highlight the last day's data | |
8a7cc60e RK |
1184 | var last = points[points.length-1]; |
1185 | if (last != null && canvasx > last.canvasx) | |
6a1aa64f DV |
1186 | lastx = points[points.length-1].xval; |
1187 | ||
1188 | // Extract the points we've selected | |
b258a3da | 1189 | this.selPoints_ = []; |
50360fd0 | 1190 | var l = points.length; |
416b05ad NK |
1191 | if (!this.attr_("stackedGraph")) { |
1192 | for (var i = 0; i < l; i++) { | |
1193 | if (points[i].xval == lastx) { | |
1194 | this.selPoints_.push(points[i]); | |
1195 | } | |
1196 | } | |
1197 | } else { | |
354e15ab DE |
1198 | // Need to 'unstack' points starting from the bottom |
1199 | var cumulative_sum = 0; | |
416b05ad NK |
1200 | for (var i = l - 1; i >= 0; i--) { |
1201 | if (points[i].xval == lastx) { | |
354e15ab | 1202 | var p = {}; // Clone the point since we modify it |
d4139cd8 NK |
1203 | for (var k in points[i]) { |
1204 | p[k] = points[i][k]; | |
50360fd0 NK |
1205 | } |
1206 | p.yval -= cumulative_sum; | |
1207 | cumulative_sum += p.yval; | |
d4139cd8 | 1208 | this.selPoints_.push(p); |
12e4c741 | 1209 | } |
6a1aa64f | 1210 | } |
354e15ab | 1211 | this.selPoints_.reverse(); |
6a1aa64f DV |
1212 | } |
1213 | ||
b258a3da | 1214 | if (this.attr_("highlightCallback")) { |
a4c6a67c | 1215 | var px = this.lastx_; |
dd082dda | 1216 | if (px !== null && lastx != px) { |
344ba8c0 | 1217 | // only fire if the selected point has changed. |
2ddb1197 | 1218 | this.attr_("highlightCallback")(event, lastx, this.selPoints_, this.idxToRow_(idx)); |
43af96e7 | 1219 | } |
12e4c741 | 1220 | } |
43af96e7 | 1221 | |
239c712d NAG |
1222 | // Save last x position for callbacks. |
1223 | this.lastx_ = lastx; | |
50360fd0 | 1224 | |
239c712d NAG |
1225 | this.updateSelection_(); |
1226 | }; | |
b258a3da | 1227 | |
239c712d | 1228 | /** |
1903f1e4 | 1229 | * Transforms layout_.points index into data row number. |
2ddb1197 | 1230 | * @param int layout_.points index |
1903f1e4 | 1231 | * @return int row number, or -1 if none could be found. |
2ddb1197 SC |
1232 | * @private |
1233 | */ | |
1234 | Dygraph.prototype.idxToRow_ = function(idx) { | |
1903f1e4 | 1235 | if (idx < 0) return -1; |
2ddb1197 | 1236 | |
1903f1e4 DV |
1237 | for (var i in this.layout_.datasets) { |
1238 | if (idx < this.layout_.datasets[i].length) { | |
1239 | return this.boundaryIds_[0][0]+idx; | |
1240 | } | |
1241 | idx -= this.layout_.datasets[i].length; | |
1242 | } | |
1243 | return -1; | |
1244 | }; | |
2ddb1197 SC |
1245 | |
1246 | /** | |
239c712d NAG |
1247 | * Draw dots over the selectied points in the data series. This function |
1248 | * takes care of cleanup of previously-drawn dots. | |
1249 | * @private | |
1250 | */ | |
1251 | Dygraph.prototype.updateSelection_ = function() { | |
6a1aa64f | 1252 | // Clear the previously drawn vertical, if there is one |
6a1aa64f DV |
1253 | var ctx = this.canvas_.getContext("2d"); |
1254 | if (this.previousVerticalX_ >= 0) { | |
46dde5f9 DV |
1255 | // Determine the maximum highlight circle size. |
1256 | var maxCircleSize = 0; | |
227b93cc DV |
1257 | var labels = this.attr_('labels'); |
1258 | for (var i = 1; i < labels.length; i++) { | |
1259 | var r = this.attr_('highlightCircleSize', labels[i]); | |
46dde5f9 DV |
1260 | if (r > maxCircleSize) maxCircleSize = r; |
1261 | } | |
6a1aa64f | 1262 | var px = this.previousVerticalX_; |
46dde5f9 DV |
1263 | ctx.clearRect(px - maxCircleSize - 1, 0, |
1264 | 2 * maxCircleSize + 2, this.height_); | |
6a1aa64f DV |
1265 | } |
1266 | ||
584ceeaa DV |
1267 | var isOK = function(x) { return x && !isNaN(x); }; |
1268 | ||
d160cc3b | 1269 | if (this.selPoints_.length > 0) { |
b258a3da | 1270 | var canvasx = this.selPoints_[0].canvasx; |
6a1aa64f DV |
1271 | |
1272 | // Set the status message to indicate the selected point(s) | |
239c712d | 1273 | var replace = this.attr_('xValueFormatter')(this.lastx_, this) + ":"; |
50360fd0 | 1274 | var fmtFunc = this.attr_('yValueFormatter'); |
6a1aa64f | 1275 | var clen = this.colors_.length; |
d160cc3b NK |
1276 | |
1277 | if (this.attr_('showLabelsOnHighlight')) { | |
1278 | // Set the status message to indicate the selected point(s) | |
d160cc3b | 1279 | for (var i = 0; i < this.selPoints_.length; i++) { |
129569a5 | 1280 | if (!this.attr_("labelsShowZeroValues") && this.selPoints_[i].yval == 0) continue; |
d160cc3b NK |
1281 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
1282 | if (this.attr_("labelsSeparateLines")) { | |
1283 | replace += "<br/>"; | |
1284 | } | |
1285 | var point = this.selPoints_[i]; | |
8fb6dc24 | 1286 | var c = new RGBColor(this.plotter_.colors[point.name]); |
3c1d225b | 1287 | var yval = fmtFunc(point.yval, this.numDigits_ + 1); // In tenths. |
d160cc3b NK |
1288 | replace += " <b><font color='" + c.toHex() + "'>" |
1289 | + point.name + "</font></b>:" | |
1290 | + yval; | |
6a1aa64f | 1291 | } |
50360fd0 | 1292 | |
d160cc3b | 1293 | this.attr_("labelsDiv").innerHTML = replace; |
6a1aa64f | 1294 | } |
6a1aa64f | 1295 | |
6a1aa64f | 1296 | // Draw colored circles over the center of each selected point |
43af96e7 | 1297 | ctx.save(); |
b258a3da | 1298 | for (var i = 0; i < this.selPoints_.length; i++) { |
f032c51d | 1299 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
227b93cc DV |
1300 | var circleSize = |
1301 | this.attr_('highlightCircleSize', this.selPoints_[i].name); | |
6a1aa64f | 1302 | ctx.beginPath(); |
563c70ca | 1303 | ctx.fillStyle = this.plotter_.colors[this.selPoints_[i].name]; |
f032c51d | 1304 | ctx.arc(canvasx, this.selPoints_[i].canvasy, circleSize, |
7bf6a9fe | 1305 | 0, 2 * Math.PI, false); |
6a1aa64f DV |
1306 | ctx.fill(); |
1307 | } | |
1308 | ctx.restore(); | |
1309 | ||
1310 | this.previousVerticalX_ = canvasx; | |
1311 | } | |
1312 | }; | |
1313 | ||
1314 | /** | |
239c712d NAG |
1315 | * Set manually set selected dots, and display information about them |
1316 | * @param int row number that should by highlighted | |
1317 | * false value clears the selection | |
1318 | * @public | |
1319 | */ | |
1320 | Dygraph.prototype.setSelection = function(row) { | |
1321 | // Extract the points we've selected | |
1322 | this.selPoints_ = []; | |
1323 | var pos = 0; | |
50360fd0 | 1324 | |
239c712d | 1325 | if (row !== false) { |
16269f6e NAG |
1326 | row = row-this.boundaryIds_[0][0]; |
1327 | } | |
50360fd0 | 1328 | |
16269f6e | 1329 | if (row !== false && row >= 0) { |
239c712d | 1330 | for (var i in this.layout_.datasets) { |
16269f6e | 1331 | if (row < this.layout_.datasets[i].length) { |
38f33a44 | 1332 | var point = this.layout_.points[pos+row]; |
1333 | ||
1334 | if (this.attr_("stackedGraph")) { | |
8c03ba63 | 1335 | point = this.layout_.unstackPointAtIndex(pos+row); |
38f33a44 | 1336 | } |
1337 | ||
1338 | this.selPoints_.push(point); | |
16269f6e | 1339 | } |
239c712d NAG |
1340 | pos += this.layout_.datasets[i].length; |
1341 | } | |
16269f6e | 1342 | } |
50360fd0 | 1343 | |
16269f6e | 1344 | if (this.selPoints_.length) { |
239c712d NAG |
1345 | this.lastx_ = this.selPoints_[0].xval; |
1346 | this.updateSelection_(); | |
1347 | } else { | |
1348 | this.lastx_ = -1; | |
1349 | this.clearSelection(); | |
1350 | } | |
1351 | ||
1352 | }; | |
1353 | ||
1354 | /** | |
6a1aa64f DV |
1355 | * The mouse has left the canvas. Clear out whatever artifacts remain |
1356 | * @param {Object} event the mouseout event from the browser. | |
1357 | * @private | |
1358 | */ | |
285a6bda | 1359 | Dygraph.prototype.mouseOut_ = function(event) { |
a4c6a67c AV |
1360 | if (this.attr_("unhighlightCallback")) { |
1361 | this.attr_("unhighlightCallback")(event); | |
1362 | } | |
1363 | ||
43af96e7 | 1364 | if (this.attr_("hideOverlayOnMouseOut")) { |
239c712d | 1365 | this.clearSelection(); |
43af96e7 | 1366 | } |
6a1aa64f DV |
1367 | }; |
1368 | ||
239c712d NAG |
1369 | /** |
1370 | * Remove all selection from the canvas | |
1371 | * @public | |
1372 | */ | |
1373 | Dygraph.prototype.clearSelection = function() { | |
1374 | // Get rid of the overlay data | |
1375 | var ctx = this.canvas_.getContext("2d"); | |
1376 | ctx.clearRect(0, 0, this.width_, this.height_); | |
1377 | this.attr_("labelsDiv").innerHTML = ""; | |
1378 | this.selPoints_ = []; | |
1379 | this.lastx_ = -1; | |
1380 | } | |
1381 | ||
103b7292 NAG |
1382 | /** |
1383 | * Returns the number of the currently selected row | |
1384 | * @return int row number, of -1 if nothing is selected | |
1385 | * @public | |
1386 | */ | |
1387 | Dygraph.prototype.getSelection = function() { | |
1388 | if (!this.selPoints_ || this.selPoints_.length < 1) { | |
1389 | return -1; | |
1390 | } | |
50360fd0 | 1391 | |
103b7292 NAG |
1392 | for (var row=0; row<this.layout_.points.length; row++ ) { |
1393 | if (this.layout_.points[row].x == this.selPoints_[0].x) { | |
16269f6e | 1394 | return row + this.boundaryIds_[0][0]; |
103b7292 NAG |
1395 | } |
1396 | } | |
1397 | return -1; | |
1398 | } | |
1399 | ||
285a6bda | 1400 | Dygraph.zeropad = function(x) { |
32988383 DV |
1401 | if (x < 10) return "0" + x; else return "" + x; |
1402 | } | |
1403 | ||
6a1aa64f | 1404 | /** |
6b8e33dd DV |
1405 | * Return a string version of the hours, minutes and seconds portion of a date. |
1406 | * @param {Number} date The JavaScript date (ms since epoch) | |
1407 | * @return {String} A time of the form "HH:MM:SS" | |
1408 | * @private | |
1409 | */ | |
bf640e56 | 1410 | Dygraph.hmsString_ = function(date) { |
285a6bda | 1411 | var zeropad = Dygraph.zeropad; |
6b8e33dd DV |
1412 | var d = new Date(date); |
1413 | if (d.getSeconds()) { | |
1414 | return zeropad(d.getHours()) + ":" + | |
1415 | zeropad(d.getMinutes()) + ":" + | |
1416 | zeropad(d.getSeconds()); | |
6b8e33dd | 1417 | } else { |
054531ca | 1418 | return zeropad(d.getHours()) + ":" + zeropad(d.getMinutes()); |
6b8e33dd DV |
1419 | } |
1420 | } | |
1421 | ||
1422 | /** | |
bf640e56 AV |
1423 | * Convert a JS date to a string appropriate to display on an axis that |
1424 | * is displaying values at the stated granularity. | |
1425 | * @param {Date} date The date to format | |
1426 | * @param {Number} granularity One of the Dygraph granularity constants | |
1427 | * @return {String} The formatted date | |
1428 | * @private | |
1429 | */ | |
1430 | Dygraph.dateAxisFormatter = function(date, granularity) { | |
1431 | if (granularity >= Dygraph.MONTHLY) { | |
1432 | return date.strftime('%b %y'); | |
1433 | } else { | |
31eddad3 | 1434 | var frac = date.getHours() * 3600 + date.getMinutes() * 60 + date.getSeconds() + date.getMilliseconds(); |
bf640e56 AV |
1435 | if (frac == 0 || granularity >= Dygraph.DAILY) { |
1436 | return new Date(date.getTime() + 3600*1000).strftime('%d%b'); | |
1437 | } else { | |
1438 | return Dygraph.hmsString_(date.getTime()); | |
1439 | } | |
1440 | } | |
1441 | } | |
1442 | ||
1443 | /** | |
6a1aa64f DV |
1444 | * Convert a JS date (millis since epoch) to YYYY/MM/DD |
1445 | * @param {Number} date The JavaScript date (ms since epoch) | |
1446 | * @return {String} A date of the form "YYYY/MM/DD" | |
1447 | * @private | |
1448 | */ | |
285a6bda DV |
1449 | Dygraph.dateString_ = function(date, self) { |
1450 | var zeropad = Dygraph.zeropad; | |
6a1aa64f DV |
1451 | var d = new Date(date); |
1452 | ||
1453 | // Get the year: | |
1454 | var year = "" + d.getFullYear(); | |
1455 | // Get a 0 padded month string | |
6b8e33dd | 1456 | var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh |
6a1aa64f | 1457 | // Get a 0 padded day string |
6b8e33dd | 1458 | var day = zeropad(d.getDate()); |
6a1aa64f | 1459 | |
6b8e33dd DV |
1460 | var ret = ""; |
1461 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); | |
bf640e56 | 1462 | if (frac) ret = " " + Dygraph.hmsString_(date); |
6b8e33dd DV |
1463 | |
1464 | return year + "/" + month + "/" + day + ret; | |
6a1aa64f DV |
1465 | }; |
1466 | ||
1467 | /** | |
6a1aa64f DV |
1468 | * Fires when there's data available to be graphed. |
1469 | * @param {String} data Raw CSV data to be plotted | |
1470 | * @private | |
1471 | */ | |
285a6bda | 1472 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f | 1473 | this.rawData_ = this.parseCSV_(data); |
26ca7938 | 1474 | this.predraw_(); |
6a1aa64f DV |
1475 | }; |
1476 | ||
285a6bda | 1477 | Dygraph.prototype.months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", |
8846615a | 1478 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]; |
285a6bda | 1479 | Dygraph.prototype.quarters = ["Jan", "Apr", "Jul", "Oct"]; |
6a1aa64f DV |
1480 | |
1481 | /** | |
1482 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
1483 | * @private | |
1484 | */ | |
285a6bda | 1485 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f DV |
1486 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
1487 | var startDate, endDate; | |
1488 | if (this.dateWindow_) { | |
1489 | startDate = this.dateWindow_[0]; | |
1490 | endDate = this.dateWindow_[1]; | |
1491 | } else { | |
1492 | startDate = this.rawData_[0][0]; | |
1493 | endDate = this.rawData_[this.rawData_.length - 1][0]; | |
1494 | } | |
1495 | ||
3c1d225b JB |
1496 | var ret = this.attr_('xTicker')(startDate, endDate, this); |
1497 | if (ret.ticks !== undefined) { // Used numericTicks()? | |
1498 | this.layout_.updateOptions({xTicks: ret.ticks}); | |
1499 | } else { // Used dateTicker() instead. | |
1500 | this.layout_.updateOptions({xTicks: ret}); | |
1501 | } | |
32988383 DV |
1502 | }; |
1503 | ||
1504 | // Time granularity enumeration | |
285a6bda | 1505 | Dygraph.SECONDLY = 0; |
20a41c17 DV |
1506 | Dygraph.TWO_SECONDLY = 1; |
1507 | Dygraph.FIVE_SECONDLY = 2; | |
1508 | Dygraph.TEN_SECONDLY = 3; | |
1509 | Dygraph.THIRTY_SECONDLY = 4; | |
1510 | Dygraph.MINUTELY = 5; | |
1511 | Dygraph.TWO_MINUTELY = 6; | |
1512 | Dygraph.FIVE_MINUTELY = 7; | |
1513 | Dygraph.TEN_MINUTELY = 8; | |
1514 | Dygraph.THIRTY_MINUTELY = 9; | |
1515 | Dygraph.HOURLY = 10; | |
1516 | Dygraph.TWO_HOURLY = 11; | |
1517 | Dygraph.SIX_HOURLY = 12; | |
1518 | Dygraph.DAILY = 13; | |
1519 | Dygraph.WEEKLY = 14; | |
1520 | Dygraph.MONTHLY = 15; | |
1521 | Dygraph.QUARTERLY = 16; | |
1522 | Dygraph.BIANNUAL = 17; | |
1523 | Dygraph.ANNUAL = 18; | |
1524 | Dygraph.DECADAL = 19; | |
1525 | Dygraph.NUM_GRANULARITIES = 20; | |
285a6bda DV |
1526 | |
1527 | Dygraph.SHORT_SPACINGS = []; | |
1528 | Dygraph.SHORT_SPACINGS[Dygraph.SECONDLY] = 1000 * 1; | |
20a41c17 DV |
1529 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_SECONDLY] = 1000 * 2; |
1530 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_SECONDLY] = 1000 * 5; | |
285a6bda DV |
1531 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_SECONDLY] = 1000 * 10; |
1532 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_SECONDLY] = 1000 * 30; | |
1533 | Dygraph.SHORT_SPACINGS[Dygraph.MINUTELY] = 1000 * 60; | |
20a41c17 DV |
1534 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_MINUTELY] = 1000 * 60 * 2; |
1535 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_MINUTELY] = 1000 * 60 * 5; | |
285a6bda DV |
1536 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_MINUTELY] = 1000 * 60 * 10; |
1537 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_MINUTELY] = 1000 * 60 * 30; | |
1538 | Dygraph.SHORT_SPACINGS[Dygraph.HOURLY] = 1000 * 3600; | |
20a41c17 | 1539 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_HOURLY] = 1000 * 3600 * 2; |
805d5519 | 1540 | Dygraph.SHORT_SPACINGS[Dygraph.SIX_HOURLY] = 1000 * 3600 * 6; |
285a6bda DV |
1541 | Dygraph.SHORT_SPACINGS[Dygraph.DAILY] = 1000 * 86400; |
1542 | Dygraph.SHORT_SPACINGS[Dygraph.WEEKLY] = 1000 * 604800; | |
32988383 DV |
1543 | |
1544 | // NumXTicks() | |
1545 | // | |
1546 | // If we used this time granularity, how many ticks would there be? | |
1547 | // This is only an approximation, but it's generally good enough. | |
1548 | // | |
285a6bda DV |
1549 | Dygraph.prototype.NumXTicks = function(start_time, end_time, granularity) { |
1550 | if (granularity < Dygraph.MONTHLY) { | |
32988383 | 1551 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1552 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
32988383 DV |
1553 | return Math.floor(0.5 + 1.0 * (end_time - start_time) / spacing); |
1554 | } else { | |
1555 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1556 | var num_months = 12; | |
285a6bda DV |
1557 | if (granularity == Dygraph.QUARTERLY) num_months = 3; |
1558 | if (granularity == Dygraph.BIANNUAL) num_months = 2; | |
1559 | if (granularity == Dygraph.ANNUAL) num_months = 1; | |
1560 | if (granularity == Dygraph.DECADAL) { num_months = 1; year_mod = 10; } | |
32988383 DV |
1561 | |
1562 | var msInYear = 365.2524 * 24 * 3600 * 1000; | |
1563 | var num_years = 1.0 * (end_time - start_time) / msInYear; | |
1564 | return Math.floor(0.5 + 1.0 * num_years * num_months / year_mod); | |
1565 | } | |
1566 | }; | |
1567 | ||
1568 | // GetXAxis() | |
1569 | // | |
1570 | // Construct an x-axis of nicely-formatted times on meaningful boundaries | |
1571 | // (e.g. 'Jan 09' rather than 'Jan 22, 2009'). | |
1572 | // | |
1573 | // Returns an array containing {v: millis, label: label} dictionaries. | |
1574 | // | |
285a6bda | 1575 | Dygraph.prototype.GetXAxis = function(start_time, end_time, granularity) { |
bf640e56 | 1576 | var formatter = this.attr_("xAxisLabelFormatter"); |
32988383 | 1577 | var ticks = []; |
285a6bda | 1578 | if (granularity < Dygraph.MONTHLY) { |
32988383 | 1579 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1580 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
3d29302c | 1581 | var format = '%d%b'; // e.g. "1Jan" |
076c9622 DV |
1582 | |
1583 | // Find a time less than start_time which occurs on a "nice" time boundary | |
1584 | // for this granularity. | |
1585 | var g = spacing / 1000; | |
076c9622 DV |
1586 | var d = new Date(start_time); |
1587 | if (g <= 60) { // seconds | |
1588 | var x = d.getSeconds(); d.setSeconds(x - x % g); | |
1589 | } else { | |
1590 | d.setSeconds(0); | |
1591 | g /= 60; | |
1592 | if (g <= 60) { // minutes | |
1593 | var x = d.getMinutes(); d.setMinutes(x - x % g); | |
1594 | } else { | |
1595 | d.setMinutes(0); | |
1596 | g /= 60; | |
1597 | ||
1598 | if (g <= 24) { // days | |
1599 | var x = d.getHours(); d.setHours(x - x % g); | |
1600 | } else { | |
1601 | d.setHours(0); | |
1602 | g /= 24; | |
1603 | ||
1604 | if (g == 7) { // one week | |
20a41c17 | 1605 | d.setDate(d.getDate() - d.getDay()); |
076c9622 DV |
1606 | } |
1607 | } | |
1608 | } | |
328bb812 | 1609 | } |
076c9622 DV |
1610 | start_time = d.getTime(); |
1611 | ||
32988383 | 1612 | for (var t = start_time; t <= end_time; t += spacing) { |
bf640e56 | 1613 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1614 | } |
1615 | } else { | |
1616 | // Display a tick mark on the first of a set of months of each year. | |
1617 | // Years get a tick mark iff y % year_mod == 0. This is useful for | |
1618 | // displaying a tick mark once every 10 years, say, on long time scales. | |
1619 | var months; | |
1620 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1621 | ||
285a6bda | 1622 | if (granularity == Dygraph.MONTHLY) { |
32988383 | 1623 | months = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ]; |
285a6bda | 1624 | } else if (granularity == Dygraph.QUARTERLY) { |
32988383 | 1625 | months = [ 0, 3, 6, 9 ]; |
285a6bda | 1626 | } else if (granularity == Dygraph.BIANNUAL) { |
32988383 | 1627 | months = [ 0, 6 ]; |
285a6bda | 1628 | } else if (granularity == Dygraph.ANNUAL) { |
32988383 | 1629 | months = [ 0 ]; |
285a6bda | 1630 | } else if (granularity == Dygraph.DECADAL) { |
32988383 DV |
1631 | months = [ 0 ]; |
1632 | year_mod = 10; | |
1633 | } | |
1634 | ||
1635 | var start_year = new Date(start_time).getFullYear(); | |
1636 | var end_year = new Date(end_time).getFullYear(); | |
285a6bda | 1637 | var zeropad = Dygraph.zeropad; |
32988383 DV |
1638 | for (var i = start_year; i <= end_year; i++) { |
1639 | if (i % year_mod != 0) continue; | |
1640 | for (var j = 0; j < months.length; j++) { | |
1641 | var date_str = i + "/" + zeropad(1 + months[j]) + "/01"; | |
1642 | var t = Date.parse(date_str); | |
1643 | if (t < start_time || t > end_time) continue; | |
bf640e56 | 1644 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1645 | } |
1646 | } | |
1647 | } | |
1648 | ||
1649 | return ticks; | |
1650 | }; | |
1651 | ||
6a1aa64f DV |
1652 | |
1653 | /** | |
1654 | * Add ticks to the x-axis based on a date range. | |
1655 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1656 | * @param {Number} endDate End of the date window (millis since epoch) | |
1657 | * @return {Array.<Object>} Array of {label, value} tuples. | |
1658 | * @public | |
1659 | */ | |
285a6bda | 1660 | Dygraph.dateTicker = function(startDate, endDate, self) { |
32988383 | 1661 | var chosen = -1; |
285a6bda DV |
1662 | for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) { |
1663 | var num_ticks = self.NumXTicks(startDate, endDate, i); | |
1664 | if (self.width_ / num_ticks >= self.attr_('pixelsPerXLabel')) { | |
32988383 DV |
1665 | chosen = i; |
1666 | break; | |
2769de62 | 1667 | } |
6a1aa64f DV |
1668 | } |
1669 | ||
32988383 | 1670 | if (chosen >= 0) { |
285a6bda | 1671 | return self.GetXAxis(startDate, endDate, chosen); |
6a1aa64f | 1672 | } else { |
32988383 | 1673 | // TODO(danvk): signal error. |
6a1aa64f | 1674 | } |
6a1aa64f DV |
1675 | }; |
1676 | ||
1677 | /** | |
3c1d225b JB |
1678 | * Determine the number of significant figures in a Number up to the specified |
1679 | * precision. Note that there is no way to determine if a trailing '0' is | |
1680 | * significant or not, so by convention we return 1 for all of the following | |
1681 | * inputs: 1, 1.0, 1.00, 1.000 etc. | |
1682 | * @param {Number} x The input value. | |
1683 | * @param {Number} opt_maxPrecision Optional maximum precision to consider. | |
1684 | * Default and maximum allowed value is 13. | |
1685 | * @return {Number} The number of significant figures which is >= 1. | |
1686 | */ | |
1687 | Dygraph.significantFigures = function(x, opt_maxPrecision) { | |
1688 | var precision = Math.max(opt_maxPrecision || 13, 13); | |
1689 | ||
1690 | // Convert the number to it's exponential notation form and work backwards, | |
1691 | // ignoring the 'e+xx' bit. This may seem like a hack, but doing a loop and | |
1692 | // dividing by 10 leads to roundoff errors. By using toExponential(), we let | |
1693 | // the JavaScript interpreter handle the low level bits of the Number for us. | |
1694 | var s = x.toExponential(precision); | |
1695 | var ePos = s.lastIndexOf('e'); // -1 case handled by return below. | |
1696 | ||
1697 | for (var i = ePos - 1; i >= 0; i--) { | |
1698 | if (s[i] == '.') { | |
1699 | // Got to the decimal place. We'll call this 1 digit of precision because | |
1700 | // we can't know for sure how many trailing 0s are significant. | |
1701 | return 1; | |
1702 | } else if (s[i] != '0') { | |
1703 | // Found the first non-zero digit. Return the number of characters | |
1704 | // except for the '.'. | |
1705 | return i; // This is i - 1 + 1 (-1 is for '.', +1 is for 0 based index). | |
1706 | } | |
1707 | } | |
1708 | ||
1709 | // Occurs if toExponential() doesn't return a string containing 'e', which | |
1710 | // should never happen. | |
1711 | return 1; | |
1712 | }; | |
1713 | ||
1714 | /** | |
6a1aa64f DV |
1715 | * Add ticks when the x axis has numbers on it (instead of dates) |
1716 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1717 | * @param {Number} endDate End of the date window (millis since epoch) | |
84fc6aa7 | 1718 | * @param self |
f30cf740 | 1719 | * @param {function} attribute accessor function. |
6a1aa64f DV |
1720 | * @return {Array.<Object>} Array of {label, value} tuples. |
1721 | * @public | |
1722 | */ | |
0d64e596 | 1723 | Dygraph.numericTicks = function(minV, maxV, self, axis_props, vals) { |
70c80071 DV |
1724 | var attr = function(k) { |
1725 | if (axis_props && axis_props.hasOwnProperty(k)) return axis_props[k]; | |
1726 | return self.attr_(k); | |
1727 | }; | |
f09fc545 | 1728 | |
0d64e596 DV |
1729 | var ticks = []; |
1730 | if (vals) { | |
1731 | for (var i = 0; i < vals.length; i++) { | |
3c1d225b | 1732 | ticks[i] = {v: vals[i]}; |
0d64e596 | 1733 | } |
f09e46d4 | 1734 | } else { |
0d64e596 DV |
1735 | // Basic idea: |
1736 | // Try labels every 1, 2, 5, 10, 20, 50, 100, etc. | |
1737 | // Calculate the resulting tick spacing (i.e. this.height_ / nTicks). | |
1738 | // The first spacing greater than pixelsPerYLabel is what we use. | |
1739 | // TODO(danvk): version that works on a log scale. | |
f09fc545 | 1740 | if (attr("labelsKMG2")) { |
0d64e596 | 1741 | var mults = [1, 2, 4, 8]; |
f09e46d4 | 1742 | } else { |
0d64e596 | 1743 | var mults = [1, 2, 5]; |
f09e46d4 | 1744 | } |
0d64e596 DV |
1745 | var scale, low_val, high_val, nTicks; |
1746 | // TODO(danvk): make it possible to set this for x- and y-axes independently. | |
1747 | var pixelsPerTick = attr('pixelsPerYLabel'); | |
1748 | for (var i = -10; i < 50; i++) { | |
1749 | if (attr("labelsKMG2")) { | |
1750 | var base_scale = Math.pow(16, i); | |
1751 | } else { | |
1752 | var base_scale = Math.pow(10, i); | |
1753 | } | |
1754 | for (var j = 0; j < mults.length; j++) { | |
1755 | scale = base_scale * mults[j]; | |
1756 | low_val = Math.floor(minV / scale) * scale; | |
1757 | high_val = Math.ceil(maxV / scale) * scale; | |
1758 | nTicks = Math.abs(high_val - low_val) / scale; | |
1759 | var spacing = self.height_ / nTicks; | |
1760 | // wish I could break out of both loops at once... | |
1761 | if (spacing > pixelsPerTick) break; | |
1762 | } | |
285a6bda | 1763 | if (spacing > pixelsPerTick) break; |
c6336f04 | 1764 | } |
0d64e596 DV |
1765 | |
1766 | // Construct the set of ticks. | |
1767 | // Allow reverse y-axis if it's explicitly requested. | |
1768 | if (low_val > high_val) scale *= -1; | |
1769 | for (var i = 0; i < nTicks; i++) { | |
1770 | var tickV = low_val + i * scale; | |
3c1d225b | 1771 | ticks[i] = {v: tickV}; |
0d64e596 | 1772 | } |
6a1aa64f DV |
1773 | } |
1774 | ||
0d64e596 | 1775 | // Add formatted labels to the ticks. |
ed11be50 DV |
1776 | var k; |
1777 | var k_labels = []; | |
f09fc545 | 1778 | if (attr("labelsKMB")) { |
ed11be50 DV |
1779 | k = 1000; |
1780 | k_labels = [ "K", "M", "B", "T" ]; | |
1781 | } | |
f09fc545 | 1782 | if (attr("labelsKMG2")) { |
ed11be50 DV |
1783 | if (k) self.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); |
1784 | k = 1024; | |
1785 | k_labels = [ "k", "M", "G", "T" ]; | |
1786 | } | |
3c1d225b JB |
1787 | var formatter = attr('yAxisLabelFormatter') ? |
1788 | attr('yAxisLabelFormatter') : attr('yValueFormatter'); | |
1789 | ||
1790 | // Determine the number of decimal places needed for the labels below by | |
1791 | // taking the maximum number of significant figures for any label. We must | |
1792 | // take the max because we can't tell if trailing 0s are significant. | |
1793 | var numDigits = 0; | |
1794 | for (var i = 0; i < ticks.length; i++) { | |
1795 | var tickV = ticks[i].v; | |
1796 | numDigits = Math.max(Dygraph.significantFigures(tickV), numDigits); | |
1797 | } | |
ed11be50 | 1798 | |
0d64e596 DV |
1799 | for (var i = 0; i < ticks.length; i++) { |
1800 | var tickV = ticks[i].v; | |
0af6e346 | 1801 | var absTickV = Math.abs(tickV); |
3c1d225b JB |
1802 | var label = (formatter !== undefined) ? |
1803 | formatter(tickV, numDigits) : tickV.toPrecision(numDigits); | |
1804 | if (k_labels.length > 0) { | |
ed11be50 DV |
1805 | // Round up to an appropriate unit. |
1806 | var n = k*k*k*k; | |
1807 | for (var j = 3; j >= 0; j--, n /= k) { | |
1808 | if (absTickV >= n) { | |
3c1d225b | 1809 | label = (tickV / n).toPrecision(numDigits) + k_labels[j]; |
ed11be50 DV |
1810 | break; |
1811 | } | |
afefbcdb | 1812 | } |
6a1aa64f | 1813 | } |
0d64e596 | 1814 | ticks[i].label = label; |
6a1aa64f | 1815 | } |
3c1d225b | 1816 | return {ticks: ticks, numDigits: numDigits}; |
6a1aa64f DV |
1817 | }; |
1818 | ||
5011e7a1 DV |
1819 | // Computes the range of the data series (including confidence intervals). |
1820 | // series is either [ [x1, y1], [x2, y2], ... ] or | |
1821 | // [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... | |
1822 | // Returns [low, high] | |
1823 | Dygraph.prototype.extremeValues_ = function(series) { | |
1824 | var minY = null, maxY = null; | |
1825 | ||
9922b78b | 1826 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
5011e7a1 DV |
1827 | if (bars) { |
1828 | // With custom bars, maxY is the max of the high values. | |
1829 | for (var j = 0; j < series.length; j++) { | |
1830 | var y = series[j][1][0]; | |
1831 | if (!y) continue; | |
1832 | var low = y - series[j][1][1]; | |
1833 | var high = y + series[j][1][2]; | |
1834 | if (low > y) low = y; // this can happen with custom bars, | |
1835 | if (high < y) high = y; // e.g. in tests/custom-bars.html | |
1836 | if (maxY == null || high > maxY) { | |
1837 | maxY = high; | |
1838 | } | |
1839 | if (minY == null || low < minY) { | |
1840 | minY = low; | |
1841 | } | |
1842 | } | |
1843 | } else { | |
1844 | for (var j = 0; j < series.length; j++) { | |
1845 | var y = series[j][1]; | |
d12999d3 | 1846 | if (y === null || isNaN(y)) continue; |
5011e7a1 DV |
1847 | if (maxY == null || y > maxY) { |
1848 | maxY = y; | |
1849 | } | |
1850 | if (minY == null || y < minY) { | |
1851 | minY = y; | |
1852 | } | |
1853 | } | |
1854 | } | |
1855 | ||
1856 | return [minY, maxY]; | |
1857 | }; | |
1858 | ||
6a1aa64f | 1859 | /** |
26ca7938 DV |
1860 | * This function is called once when the chart's data is changed or the options |
1861 | * dictionary is updated. It is _not_ called when the user pans or zooms. The | |
1862 | * idea is that values derived from the chart's data can be computed here, | |
1863 | * rather than every time the chart is drawn. This includes things like the | |
1864 | * number of axes, rolling averages, etc. | |
1865 | */ | |
1866 | Dygraph.prototype.predraw_ = function() { | |
1867 | // TODO(danvk): move more computations out of drawGraph_ and into here. | |
1868 | this.computeYAxes_(); | |
1869 | ||
1870 | // Create a new plotter. | |
70c80071 | 1871 | if (this.plotter_) this.plotter_.clear(); |
26ca7938 DV |
1872 | this.plotter_ = new DygraphCanvasRenderer(this, |
1873 | this.hidden_, this.layout_, | |
1874 | this.renderOptions_); | |
1875 | ||
0abfbd7e DV |
1876 | // The roller sits in the bottom left corner of the chart. We don't know where |
1877 | // this will be until the options are available, so it's positioned here. | |
8c69de65 | 1878 | this.createRollInterface_(); |
26ca7938 | 1879 | |
0abfbd7e DV |
1880 | // Same thing applies for the labelsDiv. It's right edge should be flush with |
1881 | // the right edge of the charting area (which may not be the same as the right | |
1882 | // edge of the div, if we have two y-axes. | |
1883 | this.positionLabelsDiv_(); | |
1884 | ||
26ca7938 DV |
1885 | // If the data or options have changed, then we'd better redraw. |
1886 | this.drawGraph_(); | |
1887 | }; | |
1888 | ||
1889 | /** | |
2f5e7e1a | 1890 | ======= |
26ca7938 DV |
1891 | * Update the graph with new data. This method is called when the viewing area |
1892 | * has changed. If the underlying data or options have changed, predraw_ will | |
1893 | * be called before drawGraph_ is called. | |
6a1aa64f DV |
1894 | * @private |
1895 | */ | |
26ca7938 DV |
1896 | Dygraph.prototype.drawGraph_ = function() { |
1897 | var data = this.rawData_; | |
1898 | ||
fe0b7c03 DV |
1899 | // This is used to set the second parameter to drawCallback, below. |
1900 | var is_initial_draw = this.is_initial_draw_; | |
1901 | this.is_initial_draw_ = false; | |
1902 | ||
3bd9c228 | 1903 | var minY = null, maxY = null; |
6a1aa64f | 1904 | this.layout_.removeAllDatasets(); |
285a6bda | 1905 | this.setColors_(); |
9317362d | 1906 | this.attrs_['pointSize'] = 0.5 * this.attr_('highlightCircleSize'); |
285a6bda | 1907 | |
354e15ab DE |
1908 | // Loop over the fields (series). Go from the last to the first, |
1909 | // because if they're stacked that's how we accumulate the values. | |
43af96e7 | 1910 | |
354e15ab DE |
1911 | var cumulative_y = []; // For stacked series. |
1912 | var datasets = []; | |
1913 | ||
f09fc545 DV |
1914 | var extremes = {}; // series name -> [low, high] |
1915 | ||
354e15ab DE |
1916 | // Loop over all fields and create datasets |
1917 | for (var i = data[0].length - 1; i >= 1; i--) { | |
1cf11047 DV |
1918 | if (!this.visibility()[i - 1]) continue; |
1919 | ||
f09fc545 | 1920 | var seriesName = this.attr_("labels")[i]; |
450fe64b DV |
1921 | var connectSeparatedPoints = this.attr_('connectSeparatedPoints', i); |
1922 | ||
6a1aa64f DV |
1923 | var series = []; |
1924 | for (var j = 0; j < data.length; j++) { | |
4a634fc7 | 1925 | if (data[j][i] != null || !connectSeparatedPoints) { |
f032c51d | 1926 | var date = data[j][0]; |
563c70ca | 1927 | series.push([date, data[j][i]]); |
f032c51d | 1928 | } |
6a1aa64f | 1929 | } |
2f5e7e1a DV |
1930 | |
1931 | // TODO(danvk): move this into predraw_. It's insane to do it here. | |
6a1aa64f DV |
1932 | series = this.rollingAverage(series, this.rollPeriod_); |
1933 | ||
1934 | // Prune down to the desired range, if necessary (for zooming) | |
1a26f3fb DV |
1935 | // Because there can be lines going to points outside of the visible area, |
1936 | // we actually prune to visible points, plus one on either side. | |
9922b78b | 1937 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
6a1aa64f DV |
1938 | if (this.dateWindow_) { |
1939 | var low = this.dateWindow_[0]; | |
1940 | var high= this.dateWindow_[1]; | |
1941 | var pruned = []; | |
1a26f3fb DV |
1942 | // TODO(danvk): do binary search instead of linear search. |
1943 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. | |
1944 | var firstIdx = null, lastIdx = null; | |
6a1aa64f | 1945 | for (var k = 0; k < series.length; k++) { |
1a26f3fb DV |
1946 | if (series[k][0] >= low && firstIdx === null) { |
1947 | firstIdx = k; | |
1948 | } | |
1949 | if (series[k][0] <= high) { | |
1950 | lastIdx = k; | |
6a1aa64f DV |
1951 | } |
1952 | } | |
1a26f3fb DV |
1953 | if (firstIdx === null) firstIdx = 0; |
1954 | if (firstIdx > 0) firstIdx--; | |
1955 | if (lastIdx === null) lastIdx = series.length - 1; | |
1956 | if (lastIdx < series.length - 1) lastIdx++; | |
16269f6e | 1957 | this.boundaryIds_[i-1] = [firstIdx, lastIdx]; |
1a26f3fb DV |
1958 | for (var k = firstIdx; k <= lastIdx; k++) { |
1959 | pruned.push(series[k]); | |
6a1aa64f DV |
1960 | } |
1961 | series = pruned; | |
16269f6e NAG |
1962 | } else { |
1963 | this.boundaryIds_[i-1] = [0, series.length-1]; | |
6a1aa64f DV |
1964 | } |
1965 | ||
f09fc545 | 1966 | var seriesExtremes = this.extremeValues_(series); |
5011e7a1 | 1967 | |
6a1aa64f | 1968 | if (bars) { |
354e15ab DE |
1969 | for (var j=0; j<series.length; j++) { |
1970 | val = [series[j][0], series[j][1][0], series[j][1][1], series[j][1][2]]; | |
1971 | series[j] = val; | |
1972 | } | |
43af96e7 | 1973 | } else if (this.attr_("stackedGraph")) { |
43af96e7 NK |
1974 | var l = series.length; |
1975 | var actual_y; | |
1976 | for (var j = 0; j < l; j++) { | |
354e15ab DE |
1977 | // If one data set has a NaN, let all subsequent stacked |
1978 | // sets inherit the NaN -- only start at 0 for the first set. | |
1979 | var x = series[j][0]; | |
41b0f691 | 1980 | if (cumulative_y[x] === undefined) { |
354e15ab | 1981 | cumulative_y[x] = 0; |
41b0f691 | 1982 | } |
43af96e7 NK |
1983 | |
1984 | actual_y = series[j][1]; | |
354e15ab | 1985 | cumulative_y[x] += actual_y; |
43af96e7 | 1986 | |
354e15ab | 1987 | series[j] = [x, cumulative_y[x]] |
43af96e7 | 1988 | |
41b0f691 DV |
1989 | if (cumulative_y[x] > seriesExtremes[1]) { |
1990 | seriesExtremes[1] = cumulative_y[x]; | |
1991 | } | |
1992 | if (cumulative_y[x] < seriesExtremes[0]) { | |
1993 | seriesExtremes[0] = cumulative_y[x]; | |
1994 | } | |
43af96e7 | 1995 | } |
6a1aa64f | 1996 | } |
41b0f691 | 1997 | extremes[seriesName] = seriesExtremes; |
354e15ab DE |
1998 | |
1999 | datasets[i] = series; | |
6a1aa64f DV |
2000 | } |
2001 | ||
354e15ab | 2002 | for (var i = 1; i < datasets.length; i++) { |
4523c1f6 | 2003 | if (!this.visibility()[i - 1]) continue; |
354e15ab | 2004 | this.layout_.addDataset(this.attr_("labels")[i], datasets[i]); |
43af96e7 NK |
2005 | } |
2006 | ||
3c1d225b JB |
2007 | this.computeYAxisRanges_(extremes); |
2008 | this.layout_.updateOptions( { yAxes: this.axes_, | |
2009 | seriesToAxisMap: this.seriesToAxisMap_ | |
9012dd21 | 2010 | } ); |
f09fc545 | 2011 | |
6a1aa64f DV |
2012 | this.addXTicks_(); |
2013 | ||
2014 | // Tell PlotKit to use this new data and render itself | |
d033ae1c | 2015 | this.layout_.updateOptions({dateWindow: this.dateWindow_}); |
6a1aa64f DV |
2016 | this.layout_.evaluateWithError(); |
2017 | this.plotter_.clear(); | |
2018 | this.plotter_.render(); | |
f6401bf6 | 2019 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
2f5e7e1a | 2020 | this.canvas_.height); |
599fb4ad DV |
2021 | |
2022 | if (this.attr_("drawCallback") !== null) { | |
fe0b7c03 | 2023 | this.attr_("drawCallback")(this, is_initial_draw); |
599fb4ad | 2024 | } |
6a1aa64f DV |
2025 | }; |
2026 | ||
2027 | /** | |
26ca7938 DV |
2028 | * Determine properties of the y-axes which are independent of the data |
2029 | * currently being displayed. This includes things like the number of axes and | |
2030 | * the style of the axes. It does not include the range of each axis and its | |
2031 | * tick marks. | |
2032 | * This fills in this.axes_ and this.seriesToAxisMap_. | |
2033 | * axes_ = [ { options } ] | |
2034 | * seriesToAxisMap_ = { seriesName: 0, seriesName2: 1, ... } | |
2035 | * indices are into the axes_ array. | |
f09fc545 | 2036 | */ |
26ca7938 DV |
2037 | Dygraph.prototype.computeYAxes_ = function() { |
2038 | this.axes_ = [{}]; // always have at least one y-axis. | |
2039 | this.seriesToAxisMap_ = {}; | |
2040 | ||
2041 | // Get a list of series names. | |
2042 | var labels = this.attr_("labels"); | |
1c77a3a1 | 2043 | var series = {}; |
26ca7938 | 2044 | for (var i = 1; i < labels.length; i++) series[labels[i]] = (i - 1); |
f09fc545 DV |
2045 | |
2046 | // all options which could be applied per-axis: | |
2047 | var axisOptions = [ | |
2048 | 'includeZero', | |
2049 | 'valueRange', | |
2050 | 'labelsKMB', | |
2051 | 'labelsKMG2', | |
2052 | 'pixelsPerYLabel', | |
2053 | 'yAxisLabelWidth', | |
2054 | 'axisLabelFontSize', | |
2055 | 'axisTickSize' | |
2056 | ]; | |
2057 | ||
2058 | // Copy global axis options over to the first axis. | |
2059 | for (var i = 0; i < axisOptions.length; i++) { | |
2060 | var k = axisOptions[i]; | |
2061 | var v = this.attr_(k); | |
26ca7938 | 2062 | if (v) this.axes_[0][k] = v; |
f09fc545 DV |
2063 | } |
2064 | ||
2065 | // Go through once and add all the axes. | |
26ca7938 DV |
2066 | for (var seriesName in series) { |
2067 | if (!series.hasOwnProperty(seriesName)) continue; | |
f09fc545 DV |
2068 | var axis = this.attr_("axis", seriesName); |
2069 | if (axis == null) { | |
26ca7938 | 2070 | this.seriesToAxisMap_[seriesName] = 0; |
f09fc545 DV |
2071 | continue; |
2072 | } | |
2073 | if (typeof(axis) == 'object') { | |
2074 | // Add a new axis, making a copy of its per-axis options. | |
2075 | var opts = {}; | |
26ca7938 | 2076 | Dygraph.update(opts, this.axes_[0]); |
f09fc545 DV |
2077 | Dygraph.update(opts, { valueRange: null }); // shouldn't inherit this. |
2078 | Dygraph.update(opts, axis); | |
26ca7938 DV |
2079 | this.axes_.push(opts); |
2080 | this.seriesToAxisMap_[seriesName] = this.axes_.length - 1; | |
f09fc545 DV |
2081 | } |
2082 | } | |
2083 | ||
2084 | // Go through one more time and assign series to an axis defined by another | |
2085 | // series, e.g. { 'Y1: { axis: {} }, 'Y2': { axis: 'Y1' } } | |
26ca7938 DV |
2086 | for (var seriesName in series) { |
2087 | if (!series.hasOwnProperty(seriesName)) continue; | |
f09fc545 DV |
2088 | var axis = this.attr_("axis", seriesName); |
2089 | if (typeof(axis) == 'string') { | |
26ca7938 | 2090 | if (!this.seriesToAxisMap_.hasOwnProperty(axis)) { |
f09fc545 DV |
2091 | this.error("Series " + seriesName + " wants to share a y-axis with " + |
2092 | "series " + axis + ", which does not define its own axis."); | |
2093 | return null; | |
2094 | } | |
26ca7938 DV |
2095 | var idx = this.seriesToAxisMap_[axis]; |
2096 | this.seriesToAxisMap_[seriesName] = idx; | |
f09fc545 DV |
2097 | } |
2098 | } | |
1c77a3a1 DV |
2099 | |
2100 | // Now we remove series from seriesToAxisMap_ which are not visible. We do | |
2101 | // this last so that hiding the first series doesn't destroy the axis | |
2102 | // properties of the primary axis. | |
2103 | var seriesToAxisFiltered = {}; | |
2104 | var vis = this.visibility(); | |
2105 | for (var i = 1; i < labels.length; i++) { | |
2106 | var s = labels[i]; | |
2107 | if (vis[i - 1]) seriesToAxisFiltered[s] = this.seriesToAxisMap_[s]; | |
2108 | } | |
2109 | this.seriesToAxisMap_ = seriesToAxisFiltered; | |
26ca7938 DV |
2110 | }; |
2111 | ||
2112 | /** | |
2113 | * Returns the number of y-axes on the chart. | |
2114 | * @return {Number} the number of axes. | |
2115 | */ | |
2116 | Dygraph.prototype.numAxes = function() { | |
2117 | var last_axis = 0; | |
2118 | for (var series in this.seriesToAxisMap_) { | |
2119 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; | |
2120 | var idx = this.seriesToAxisMap_[series]; | |
2121 | if (idx > last_axis) last_axis = idx; | |
2122 | } | |
2123 | return 1 + last_axis; | |
2124 | }; | |
2125 | ||
2126 | /** | |
2127 | * Determine the value range and tick marks for each axis. | |
2128 | * @param {Object} extremes A mapping from seriesName -> [low, high] | |
2129 | * This fills in the valueRange and ticks fields in each entry of this.axes_. | |
2130 | */ | |
2131 | Dygraph.prototype.computeYAxisRanges_ = function(extremes) { | |
2132 | // Build a map from axis number -> [list of series names] | |
2133 | var seriesForAxis = []; | |
2134 | for (var series in this.seriesToAxisMap_) { | |
2135 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; | |
2136 | var idx = this.seriesToAxisMap_[series]; | |
2137 | while (seriesForAxis.length <= idx) seriesForAxis.push([]); | |
2138 | seriesForAxis[idx].push(series); | |
2139 | } | |
f09fc545 DV |
2140 | |
2141 | // Compute extreme values, a span and tick marks for each axis. | |
26ca7938 DV |
2142 | for (var i = 0; i < this.axes_.length; i++) { |
2143 | var axis = this.axes_[i]; | |
d58ae307 DV |
2144 | if (axis.valueWindow) { |
2145 | // This is only set if the user has zoomed on the y-axis. It is never set | |
2146 | // by a user. It takes precedence over axis.valueRange because, if you set | |
2147 | // valueRange, you'd still expect to be able to pan. | |
2148 | axis.computedValueRange = [axis.valueWindow[0], axis.valueWindow[1]]; | |
2149 | } else if (axis.valueRange) { | |
2150 | // This is a user-set value range for this axis. | |
26ca7938 DV |
2151 | axis.computedValueRange = [axis.valueRange[0], axis.valueRange[1]]; |
2152 | } else { | |
1c77a3a1 | 2153 | // Calculate the extremes of extremes. |
f09fc545 DV |
2154 | var series = seriesForAxis[i]; |
2155 | var minY = Infinity; // extremes[series[0]][0]; | |
2156 | var maxY = -Infinity; // extremes[series[0]][1]; | |
2157 | for (var j = 0; j < series.length; j++) { | |
2158 | minY = Math.min(extremes[series[j]][0], minY); | |
e3b6727e | 2159 | maxY = Math.max(extremes[series[j]][1], maxY); |
f09fc545 DV |
2160 | } |
2161 | if (axis.includeZero && minY > 0) minY = 0; | |
2162 | ||
2163 | // Add some padding and round up to an integer to be human-friendly. | |
2164 | var span = maxY - minY; | |
2165 | // special case: if we have no sense of scale, use +/-10% of the sole value. | |
2166 | if (span == 0) { span = maxY; } | |
2167 | var maxAxisY = maxY + 0.1 * span; | |
2168 | var minAxisY = minY - 0.1 * span; | |
2169 | ||
2170 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. | |
2f5e7e1a DV |
2171 | if (!this.attr_("avoidMinZero")) { |
2172 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; | |
2173 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
2174 | } | |
f09fc545 DV |
2175 | |
2176 | if (this.attr_("includeZero")) { | |
2177 | if (maxY < 0) maxAxisY = 0; | |
2178 | if (minY > 0) minAxisY = 0; | |
2179 | } | |
2180 | ||
26ca7938 | 2181 | axis.computedValueRange = [minAxisY, maxAxisY]; |
f09fc545 DV |
2182 | } |
2183 | ||
0d64e596 DV |
2184 | // Add ticks. By default, all axes inherit the tick positions of the |
2185 | // primary axis. However, if an axis is specifically marked as having | |
2186 | // independent ticks, then that is permissible as well. | |
2187 | if (i == 0 || axis.independentTicks) { | |
3c1d225b | 2188 | var ret = |
0d64e596 DV |
2189 | Dygraph.numericTicks(axis.computedValueRange[0], |
2190 | axis.computedValueRange[1], | |
2191 | this, | |
2192 | axis); | |
3c1d225b JB |
2193 | axis.ticks = ret.ticks; |
2194 | this.numDigits_ = ret.numDigits; | |
0d64e596 DV |
2195 | } else { |
2196 | var p_axis = this.axes_[0]; | |
2197 | var p_ticks = p_axis.ticks; | |
2198 | var p_scale = p_axis.computedValueRange[1] - p_axis.computedValueRange[0]; | |
2199 | var scale = axis.computedValueRange[1] - axis.computedValueRange[0]; | |
2200 | var tick_values = []; | |
2201 | for (var i = 0; i < p_ticks.length; i++) { | |
2202 | var y_frac = (p_ticks[i].v - p_axis.computedValueRange[0]) / p_scale; | |
2203 | var y_val = axis.computedValueRange[0] + y_frac * scale; | |
2204 | tick_values.push(y_val); | |
2205 | } | |
2206 | ||
3c1d225b | 2207 | var ret = |
0d64e596 DV |
2208 | Dygraph.numericTicks(axis.computedValueRange[0], |
2209 | axis.computedValueRange[1], | |
2210 | this, axis, tick_values); | |
3c1d225b JB |
2211 | axis.ticks = ret.ticks; |
2212 | this.numDigits_ = ret.numDigits; | |
0d64e596 | 2213 | } |
f09fc545 | 2214 | } |
f09fc545 DV |
2215 | }; |
2216 | ||
2217 | /** | |
6a1aa64f DV |
2218 | * Calculates the rolling average of a data set. |
2219 | * If originalData is [label, val], rolls the average of those. | |
2220 | * If originalData is [label, [, it's interpreted as [value, stddev] | |
2221 | * and the roll is returned in the same form, with appropriately reduced | |
2222 | * stddev for each value. | |
2223 | * Note that this is where fractional input (i.e. '5/10') is converted into | |
2224 | * decimal values. | |
2225 | * @param {Array} originalData The data in the appropriate format (see above) | |
3c1d225b JB |
2226 | * @param {Number} rollPeriod The number of points over which to average the |
2227 | * data | |
6a1aa64f | 2228 | */ |
285a6bda | 2229 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
6a1aa64f DV |
2230 | if (originalData.length < 2) |
2231 | return originalData; | |
2232 | var rollPeriod = Math.min(rollPeriod, originalData.length - 1); | |
2233 | var rollingData = []; | |
285a6bda | 2234 | var sigma = this.attr_("sigma"); |
6a1aa64f DV |
2235 | |
2236 | if (this.fractions_) { | |
2237 | var num = 0; | |
2238 | var den = 0; // numerator/denominator | |
2239 | var mult = 100.0; | |
2240 | for (var i = 0; i < originalData.length; i++) { | |
2241 | num += originalData[i][1][0]; | |
2242 | den += originalData[i][1][1]; | |
2243 | if (i - rollPeriod >= 0) { | |
2244 | num -= originalData[i - rollPeriod][1][0]; | |
2245 | den -= originalData[i - rollPeriod][1][1]; | |
2246 | } | |
2247 | ||
2248 | var date = originalData[i][0]; | |
2249 | var value = den ? num / den : 0.0; | |
285a6bda | 2250 | if (this.attr_("errorBars")) { |
6a1aa64f DV |
2251 | if (this.wilsonInterval_) { |
2252 | // For more details on this confidence interval, see: | |
2253 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval | |
2254 | if (den) { | |
2255 | var p = value < 0 ? 0 : value, n = den; | |
2256 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); | |
2257 | var denom = 1 + sigma * sigma / den; | |
2258 | var low = (p + sigma * sigma / (2 * den) - pm) / denom; | |
2259 | var high = (p + sigma * sigma / (2 * den) + pm) / denom; | |
2260 | rollingData[i] = [date, | |
2261 | [p * mult, (p - low) * mult, (high - p) * mult]]; | |
2262 | } else { | |
2263 | rollingData[i] = [date, [0, 0, 0]]; | |
2264 | } | |
2265 | } else { | |
2266 | var stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; | |
2267 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; | |
2268 | } | |
2269 | } else { | |
2270 | rollingData[i] = [date, mult * value]; | |
2271 | } | |
2272 | } | |
9922b78b | 2273 | } else if (this.attr_("customBars")) { |
f6885d6a DV |
2274 | var low = 0; |
2275 | var mid = 0; | |
2276 | var high = 0; | |
2277 | var count = 0; | |
6a1aa64f DV |
2278 | for (var i = 0; i < originalData.length; i++) { |
2279 | var data = originalData[i][1]; | |
2280 | var y = data[1]; | |
2281 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; | |
f6885d6a | 2282 | |
8b91c51f | 2283 | if (y != null && !isNaN(y)) { |
49a7d0d5 DV |
2284 | low += data[0]; |
2285 | mid += y; | |
2286 | high += data[2]; | |
2287 | count += 1; | |
2288 | } | |
f6885d6a DV |
2289 | if (i - rollPeriod >= 0) { |
2290 | var prev = originalData[i - rollPeriod]; | |
8b91c51f | 2291 | if (prev[1][1] != null && !isNaN(prev[1][1])) { |
49a7d0d5 DV |
2292 | low -= prev[1][0]; |
2293 | mid -= prev[1][1]; | |
2294 | high -= prev[1][2]; | |
2295 | count -= 1; | |
2296 | } | |
f6885d6a DV |
2297 | } |
2298 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, | |
2299 | 1.0 * (mid - low) / count, | |
2300 | 1.0 * (high - mid) / count ]]; | |
2769de62 | 2301 | } |
6a1aa64f DV |
2302 | } else { |
2303 | // Calculate the rolling average for the first rollPeriod - 1 points where | |
3c1d225b | 2304 | // there is not enough data to roll over the full number of points |
6a1aa64f | 2305 | var num_init_points = Math.min(rollPeriod - 1, originalData.length - 2); |
285a6bda | 2306 | if (!this.attr_("errorBars")){ |
5011e7a1 DV |
2307 | if (rollPeriod == 1) { |
2308 | return originalData; | |
2309 | } | |
2310 | ||
2847c1cf | 2311 | for (var i = 0; i < originalData.length; i++) { |
6a1aa64f | 2312 | var sum = 0; |
5011e7a1 | 2313 | var num_ok = 0; |
2847c1cf DV |
2314 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
2315 | var y = originalData[j][1]; | |
8b91c51f | 2316 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 2317 | num_ok++; |
2847c1cf | 2318 | sum += originalData[j][1]; |
6a1aa64f | 2319 | } |
5011e7a1 | 2320 | if (num_ok) { |
2847c1cf | 2321 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
5011e7a1 | 2322 | } else { |
2847c1cf | 2323 | rollingData[i] = [originalData[i][0], null]; |
5011e7a1 | 2324 | } |
6a1aa64f | 2325 | } |
2847c1cf DV |
2326 | |
2327 | } else { | |
2328 | for (var i = 0; i < originalData.length; i++) { | |
6a1aa64f DV |
2329 | var sum = 0; |
2330 | var variance = 0; | |
5011e7a1 | 2331 | var num_ok = 0; |
2847c1cf | 2332 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
5011e7a1 | 2333 | var y = originalData[j][1][0]; |
8b91c51f | 2334 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 2335 | num_ok++; |
6a1aa64f DV |
2336 | sum += originalData[j][1][0]; |
2337 | variance += Math.pow(originalData[j][1][1], 2); | |
2338 | } | |
5011e7a1 DV |
2339 | if (num_ok) { |
2340 | var stddev = Math.sqrt(variance) / num_ok; | |
2341 | rollingData[i] = [originalData[i][0], | |
2342 | [sum / num_ok, sigma * stddev, sigma * stddev]]; | |
2343 | } else { | |
2344 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
2345 | } | |
6a1aa64f DV |
2346 | } |
2347 | } | |
2348 | } | |
2349 | ||
2350 | return rollingData; | |
2351 | }; | |
2352 | ||
2353 | /** | |
2354 | * Parses a date, returning the number of milliseconds since epoch. This can be | |
285a6bda DV |
2355 | * passed in as an xValueParser in the Dygraph constructor. |
2356 | * TODO(danvk): enumerate formats that this understands. | |
6a1aa64f DV |
2357 | * @param {String} A date in YYYYMMDD format. |
2358 | * @return {Number} Milliseconds since epoch. | |
2359 | * @public | |
2360 | */ | |
285a6bda | 2361 | Dygraph.dateParser = function(dateStr, self) { |
6a1aa64f | 2362 | var dateStrSlashed; |
285a6bda | 2363 | var d; |
986a5026 | 2364 | if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12' |
6a1aa64f | 2365 | dateStrSlashed = dateStr.replace("-", "/", "g"); |
353a0294 DV |
2366 | while (dateStrSlashed.search("-") != -1) { |
2367 | dateStrSlashed = dateStrSlashed.replace("-", "/"); | |
2368 | } | |
285a6bda | 2369 | d = Date.parse(dateStrSlashed); |
2769de62 | 2370 | } else if (dateStr.length == 8) { // e.g. '20090712' |
285a6bda | 2371 | // TODO(danvk): remove support for this format. It's confusing. |
6a1aa64f DV |
2372 | dateStrSlashed = dateStr.substr(0,4) + "/" + dateStr.substr(4,2) |
2373 | + "/" + dateStr.substr(6,2); | |
285a6bda | 2374 | d = Date.parse(dateStrSlashed); |
2769de62 DV |
2375 | } else { |
2376 | // Any format that Date.parse will accept, e.g. "2009/07/12" or | |
2377 | // "2009/07/12 12:34:56" | |
285a6bda DV |
2378 | d = Date.parse(dateStr); |
2379 | } | |
2380 | ||
2381 | if (!d || isNaN(d)) { | |
2382 | self.error("Couldn't parse " + dateStr + " as a date"); | |
2383 | } | |
2384 | return d; | |
2385 | }; | |
2386 | ||
2387 | /** | |
2388 | * Detects the type of the str (date or numeric) and sets the various | |
2389 | * formatting attributes in this.attrs_ based on this type. | |
2390 | * @param {String} str An x value. | |
2391 | * @private | |
2392 | */ | |
2393 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
2394 | var isDate = false; | |
2395 | if (str.indexOf('-') >= 0 || | |
2396 | str.indexOf('/') >= 0 || | |
2397 | isNaN(parseFloat(str))) { | |
2398 | isDate = true; | |
2399 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
2400 | // TODO(danvk): remove support for this format. | |
2401 | isDate = true; | |
2402 | } | |
2403 | ||
2404 | if (isDate) { | |
2405 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
2406 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2407 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2408 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
2409 | } else { |
2410 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
2411 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
2412 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2413 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
6a1aa64f | 2414 | } |
6a1aa64f DV |
2415 | }; |
2416 | ||
2417 | /** | |
2418 | * Parses a string in a special csv format. We expect a csv file where each | |
2419 | * line is a date point, and the first field in each line is the date string. | |
2420 | * We also expect that all remaining fields represent series. | |
285a6bda | 2421 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f DV |
2422 | * date, series1, stddev1, series2, stddev2, ... |
2423 | * @param {Array.<Object>} data See above. | |
2424 | * @private | |
285a6bda DV |
2425 | * |
2426 | * @return Array.<Object> An array with one entry for each row. These entries | |
2427 | * are an array of cells in that row. The first entry is the parsed x-value for | |
2428 | * the row. The second, third, etc. are the y-values. These can take on one of | |
2429 | * three forms, depending on the CSV and constructor parameters: | |
2430 | * 1. numeric value | |
2431 | * 2. [ value, stddev ] | |
2432 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 2433 | */ |
285a6bda | 2434 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f DV |
2435 | var ret = []; |
2436 | var lines = data.split("\n"); | |
3d67f03b DV |
2437 | |
2438 | // Use the default delimiter or fall back to a tab if that makes sense. | |
2439 | var delim = this.attr_('delimiter'); | |
2440 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { | |
2441 | delim = '\t'; | |
2442 | } | |
2443 | ||
285a6bda | 2444 | var start = 0; |
6a1aa64f | 2445 | if (this.labelsFromCSV_) { |
285a6bda | 2446 | start = 1; |
3d67f03b | 2447 | this.attrs_.labels = lines[0].split(delim); |
6a1aa64f DV |
2448 | } |
2449 | ||
03b522a4 DV |
2450 | // Parse the x as a float or return null if it's not a number. |
2451 | var parseFloatOrNull = function(x) { | |
41333ec0 | 2452 | var val = parseFloat(x); |
1f7f664b DV |
2453 | // isFinite() returns false for NaN and +/-Infinity. |
2454 | return isFinite(val) ? val : null; | |
03b522a4 DV |
2455 | }; |
2456 | ||
285a6bda DV |
2457 | var xParser; |
2458 | var defaultParserSet = false; // attempt to auto-detect x value type | |
2459 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 2460 | var outOfOrder = false; |
6a1aa64f DV |
2461 | for (var i = start; i < lines.length; i++) { |
2462 | var line = lines[i]; | |
2463 | if (line.length == 0) continue; // skip blank lines | |
3d67f03b DV |
2464 | if (line[0] == '#') continue; // skip comment lines |
2465 | var inFields = line.split(delim); | |
285a6bda | 2466 | if (inFields.length < 2) continue; |
6a1aa64f DV |
2467 | |
2468 | var fields = []; | |
285a6bda DV |
2469 | if (!defaultParserSet) { |
2470 | this.detectTypeFromString_(inFields[0]); | |
2471 | xParser = this.attr_("xValueParser"); | |
2472 | defaultParserSet = true; | |
2473 | } | |
2474 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
2475 | |
2476 | // If fractions are expected, parse the numbers as "A/B" | |
2477 | if (this.fractions_) { | |
2478 | for (var j = 1; j < inFields.length; j++) { | |
2479 | // TODO(danvk): figure out an appropriate way to flag parse errors. | |
2480 | var vals = inFields[j].split("/"); | |
03b522a4 | 2481 | fields[j] = [parseFloatOrNull(vals[0]), parseFloatOrNull(vals[1])]; |
6a1aa64f | 2482 | } |
285a6bda | 2483 | } else if (this.attr_("errorBars")) { |
6a1aa64f DV |
2484 | // If there are error bars, values are (value, stddev) pairs |
2485 | for (var j = 1; j < inFields.length; j += 2) | |
03b522a4 DV |
2486 | fields[(j + 1) / 2] = [parseFloatOrNull(inFields[j]), |
2487 | parseFloatOrNull(inFields[j + 1])]; | |
9922b78b | 2488 | } else if (this.attr_("customBars")) { |
6a1aa64f DV |
2489 | // Bars are a low;center;high tuple |
2490 | for (var j = 1; j < inFields.length; j++) { | |
2491 | var vals = inFields[j].split(";"); | |
03b522a4 DV |
2492 | fields[j] = [ parseFloatOrNull(vals[0]), |
2493 | parseFloatOrNull(vals[1]), | |
2494 | parseFloatOrNull(vals[2]) ]; | |
6a1aa64f DV |
2495 | } |
2496 | } else { | |
2497 | // Values are just numbers | |
285a6bda | 2498 | for (var j = 1; j < inFields.length; j++) { |
03b522a4 | 2499 | fields[j] = parseFloatOrNull(inFields[j]); |
285a6bda | 2500 | } |
6a1aa64f | 2501 | } |
987840a2 DV |
2502 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
2503 | outOfOrder = true; | |
2504 | } | |
6a1aa64f | 2505 | ret.push(fields); |
285a6bda DV |
2506 | |
2507 | if (fields.length != expectedCols) { | |
2508 | this.error("Number of columns in line " + i + " (" + fields.length + | |
2509 | ") does not agree with number of labels (" + expectedCols + | |
2510 | ") " + line); | |
2511 | } | |
6a1aa64f | 2512 | } |
987840a2 DV |
2513 | |
2514 | if (outOfOrder) { | |
2515 | this.warn("CSV is out of order; order it correctly to speed loading."); | |
2516 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2517 | } | |
2518 | ||
6a1aa64f DV |
2519 | return ret; |
2520 | }; | |
2521 | ||
2522 | /** | |
285a6bda DV |
2523 | * The user has provided their data as a pre-packaged JS array. If the x values |
2524 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
2525 | * are dates, we need to convert them from Date objects to ms since epoch. | |
2526 | * @param {Array.<Object>} data | |
2527 | * @return {Array.<Object>} data with numeric x values. | |
2528 | */ | |
2529 | Dygraph.prototype.parseArray_ = function(data) { | |
2530 | // Peek at the first x value to see if it's numeric. | |
2531 | if (data.length == 0) { | |
2532 | this.error("Can't plot empty data set"); | |
2533 | return null; | |
2534 | } | |
2535 | if (data[0].length == 0) { | |
2536 | this.error("Data set cannot contain an empty row"); | |
2537 | return null; | |
2538 | } | |
2539 | ||
2540 | if (this.attr_("labels") == null) { | |
2541 | this.warn("Using default labels. Set labels explicitly via 'labels' " + | |
2542 | "in the options parameter"); | |
2543 | this.attrs_.labels = [ "X" ]; | |
2544 | for (var i = 1; i < data[0].length; i++) { | |
2545 | this.attrs_.labels.push("Y" + i); | |
2546 | } | |
2547 | } | |
2548 | ||
2dda3850 | 2549 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda DV |
2550 | // Some intelligent defaults for a date x-axis. |
2551 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
bf640e56 | 2552 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
2553 | this.attrs_.xTicker = Dygraph.dateTicker; |
2554 | ||
2555 | // Assume they're all dates. | |
e3ab7b40 | 2556 | var parsedData = Dygraph.clone(data); |
285a6bda DV |
2557 | for (var i = 0; i < data.length; i++) { |
2558 | if (parsedData[i].length == 0) { | |
a323ff4a | 2559 | this.error("Row " + (1 + i) + " of data is empty"); |
285a6bda DV |
2560 | return null; |
2561 | } | |
2562 | if (parsedData[i][0] == null | |
3a909ec5 DV |
2563 | || typeof(parsedData[i][0].getTime) != 'function' |
2564 | || isNaN(parsedData[i][0].getTime())) { | |
be96a1f5 | 2565 | this.error("x value in row " + (1 + i) + " is not a Date"); |
285a6bda DV |
2566 | return null; |
2567 | } | |
2568 | parsedData[i][0] = parsedData[i][0].getTime(); | |
2569 | } | |
2570 | return parsedData; | |
2571 | } else { | |
2572 | // Some intelligent defaults for a numeric x-axis. | |
2573 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
2574 | this.attrs_.xTicker = Dygraph.numericTicks; | |
2575 | return data; | |
2576 | } | |
2577 | }; | |
2578 | ||
2579 | /** | |
79420a1e DV |
2580 | * Parses a DataTable object from gviz. |
2581 | * The data is expected to have a first column that is either a date or a | |
2582 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
2583 | * between this.xValueParser_ and the type of the first column, it will be | |
a685723c | 2584 | * fixed. Fills out rawData_. |
79420a1e DV |
2585 | * @param {Array.<Object>} data See above. |
2586 | * @private | |
2587 | */ | |
285a6bda | 2588 | Dygraph.prototype.parseDataTable_ = function(data) { |
79420a1e DV |
2589 | var cols = data.getNumberOfColumns(); |
2590 | var rows = data.getNumberOfRows(); | |
2591 | ||
d955e223 | 2592 | var indepType = data.getColumnType(0); |
4440f6c8 | 2593 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda DV |
2594 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
2595 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2596 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2597 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
33127159 | 2598 | } else if (indepType == 'number') { |
285a6bda DV |
2599 | this.attrs_.xValueFormatter = function(x) { return x; }; |
2600 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
2601 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2602 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
285a6bda | 2603 | } else { |
987840a2 DV |
2604 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
2605 | "column 1 of DataTable input (Got '" + indepType + "')"); | |
79420a1e DV |
2606 | return null; |
2607 | } | |
2608 | ||
a685723c DV |
2609 | // Array of the column indices which contain data (and not annotations). |
2610 | var colIdx = []; | |
2611 | var annotationCols = {}; // data index -> [annotation cols] | |
2612 | var hasAnnotations = false; | |
2613 | for (var i = 1; i < cols; i++) { | |
2614 | var type = data.getColumnType(i); | |
2615 | if (type == 'number') { | |
2616 | colIdx.push(i); | |
2617 | } else if (type == 'string' && this.attr_('displayAnnotations')) { | |
2618 | // This is OK -- it's an annotation column. | |
2619 | var dataIdx = colIdx[colIdx.length - 1]; | |
2620 | if (!annotationCols.hasOwnProperty(dataIdx)) { | |
2621 | annotationCols[dataIdx] = [i]; | |
2622 | } else { | |
2623 | annotationCols[dataIdx].push(i); | |
2624 | } | |
2625 | hasAnnotations = true; | |
2626 | } else { | |
2627 | this.error("Only 'number' is supported as a dependent type with Gviz." + | |
2628 | " 'string' is only supported if displayAnnotations is true"); | |
2629 | } | |
2630 | } | |
2631 | ||
2632 | // Read column labels | |
2633 | // TODO(danvk): add support back for errorBars | |
2634 | var labels = [data.getColumnLabel(0)]; | |
2635 | for (var i = 0; i < colIdx.length; i++) { | |
2636 | labels.push(data.getColumnLabel(colIdx[i])); | |
f9348814 | 2637 | if (this.attr_("errorBars")) i += 1; |
a685723c DV |
2638 | } |
2639 | this.attrs_.labels = labels; | |
2640 | cols = labels.length; | |
2641 | ||
79420a1e | 2642 | var ret = []; |
987840a2 | 2643 | var outOfOrder = false; |
a685723c | 2644 | var annotations = []; |
79420a1e DV |
2645 | for (var i = 0; i < rows; i++) { |
2646 | var row = []; | |
debe4434 DV |
2647 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
2648 | data.getValue(i, 0) === null) { | |
129569a5 FD |
2649 | this.warn("Ignoring row " + i + |
2650 | " of DataTable because of undefined or null first column."); | |
debe4434 DV |
2651 | continue; |
2652 | } | |
2653 | ||
c21d2c2d | 2654 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
2655 | row.push(data.getValue(i, 0).getTime()); |
2656 | } else { | |
2657 | row.push(data.getValue(i, 0)); | |
2658 | } | |
3e3f84e4 | 2659 | if (!this.attr_("errorBars")) { |
a685723c DV |
2660 | for (var j = 0; j < colIdx.length; j++) { |
2661 | var col = colIdx[j]; | |
2662 | row.push(data.getValue(i, col)); | |
2663 | if (hasAnnotations && | |
2664 | annotationCols.hasOwnProperty(col) && | |
2665 | data.getValue(i, annotationCols[col][0]) != null) { | |
2666 | var ann = {}; | |
2667 | ann.series = data.getColumnLabel(col); | |
2668 | ann.xval = row[0]; | |
2669 | ann.shortText = String.fromCharCode(65 /* A */ + annotations.length) | |
2670 | ann.text = ''; | |
2671 | for (var k = 0; k < annotationCols[col].length; k++) { | |
2672 | if (k) ann.text += "\n"; | |
2673 | ann.text += data.getValue(i, annotationCols[col][k]); | |
2674 | } | |
2675 | annotations.push(ann); | |
2676 | } | |
3e3f84e4 DV |
2677 | } |
2678 | } else { | |
2679 | for (var j = 0; j < cols - 1; j++) { | |
2680 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); | |
2681 | } | |
79420a1e | 2682 | } |
987840a2 DV |
2683 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
2684 | outOfOrder = true; | |
2685 | } | |
1f7f664b DV |
2686 | |
2687 | // Strip out infinities, which give dygraphs problems later on. | |
2688 | for (var j = 0; j < row.length; j++) { | |
2689 | if (!isFinite(row[j])) row[j] = null; | |
2690 | } | |
243d96e8 | 2691 | ret.push(row); |
79420a1e | 2692 | } |
987840a2 DV |
2693 | |
2694 | if (outOfOrder) { | |
2695 | this.warn("DataTable is out of order; order it correctly to speed loading."); | |
2696 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2697 | } | |
a685723c DV |
2698 | this.rawData_ = ret; |
2699 | ||
2700 | if (annotations.length > 0) { | |
2701 | this.setAnnotations(annotations, true); | |
2702 | } | |
79420a1e DV |
2703 | } |
2704 | ||
24e5350c | 2705 | // These functions are all based on MochiKit. |
fc80a396 DV |
2706 | Dygraph.update = function (self, o) { |
2707 | if (typeof(o) != 'undefined' && o !== null) { | |
2708 | for (var k in o) { | |
85b99f0b DV |
2709 | if (o.hasOwnProperty(k)) { |
2710 | self[k] = o[k]; | |
2711 | } | |
fc80a396 DV |
2712 | } |
2713 | } | |
2714 | return self; | |
2715 | }; | |
2716 | ||
2dda3850 DV |
2717 | Dygraph.isArrayLike = function (o) { |
2718 | var typ = typeof(o); | |
2719 | if ( | |
c21d2c2d | 2720 | (typ != 'object' && !(typ == 'function' && |
2dda3850 DV |
2721 | typeof(o.item) == 'function')) || |
2722 | o === null || | |
2723 | typeof(o.length) != 'number' || | |
2724 | o.nodeType === 3 | |
2725 | ) { | |
2726 | return false; | |
2727 | } | |
2728 | return true; | |
2729 | }; | |
2730 | ||
2731 | Dygraph.isDateLike = function (o) { | |
2732 | if (typeof(o) != "object" || o === null || | |
2733 | typeof(o.getTime) != 'function') { | |
2734 | return false; | |
2735 | } | |
2736 | return true; | |
2737 | }; | |
2738 | ||
e3ab7b40 DV |
2739 | Dygraph.clone = function(o) { |
2740 | // TODO(danvk): figure out how MochiKit's version works | |
2741 | var r = []; | |
2742 | for (var i = 0; i < o.length; i++) { | |
2743 | if (Dygraph.isArrayLike(o[i])) { | |
2744 | r.push(Dygraph.clone(o[i])); | |
2745 | } else { | |
2746 | r.push(o[i]); | |
2747 | } | |
2748 | } | |
2749 | return r; | |
24e5350c DV |
2750 | }; |
2751 | ||
2dda3850 | 2752 | |
79420a1e | 2753 | /** |
6a1aa64f DV |
2754 | * Get the CSV data. If it's in a function, call that function. If it's in a |
2755 | * file, do an XMLHttpRequest to get it. | |
2756 | * @private | |
2757 | */ | |
285a6bda | 2758 | Dygraph.prototype.start_ = function() { |
6a1aa64f | 2759 | if (typeof this.file_ == 'function') { |
285a6bda | 2760 | // CSV string. Pretend we got it via XHR. |
6a1aa64f | 2761 | this.loadedEvent_(this.file_()); |
2dda3850 | 2762 | } else if (Dygraph.isArrayLike(this.file_)) { |
285a6bda | 2763 | this.rawData_ = this.parseArray_(this.file_); |
26ca7938 | 2764 | this.predraw_(); |
79420a1e DV |
2765 | } else if (typeof this.file_ == 'object' && |
2766 | typeof this.file_.getColumnRange == 'function') { | |
2767 | // must be a DataTable from gviz. | |
a685723c | 2768 | this.parseDataTable_(this.file_); |
26ca7938 | 2769 | this.predraw_(); |
285a6bda DV |
2770 | } else if (typeof this.file_ == 'string') { |
2771 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. | |
2772 | if (this.file_.indexOf('\n') >= 0) { | |
2773 | this.loadedEvent_(this.file_); | |
2774 | } else { | |
2775 | var req = new XMLHttpRequest(); | |
2776 | var caller = this; | |
2777 | req.onreadystatechange = function () { | |
2778 | if (req.readyState == 4) { | |
2779 | if (req.status == 200) { | |
2780 | caller.loadedEvent_(req.responseText); | |
2781 | } | |
6a1aa64f | 2782 | } |
285a6bda | 2783 | }; |
6a1aa64f | 2784 | |
285a6bda DV |
2785 | req.open("GET", this.file_, true); |
2786 | req.send(null); | |
2787 | } | |
2788 | } else { | |
2789 | this.error("Unknown data format: " + (typeof this.file_)); | |
6a1aa64f DV |
2790 | } |
2791 | }; | |
2792 | ||
2793 | /** | |
2794 | * Changes various properties of the graph. These can include: | |
2795 | * <ul> | |
2796 | * <li>file: changes the source data for the graph</li> | |
2797 | * <li>errorBars: changes whether the data contains stddev</li> | |
2798 | * </ul> | |
2799 | * @param {Object} attrs The new properties and values | |
2800 | */ | |
285a6bda DV |
2801 | Dygraph.prototype.updateOptions = function(attrs) { |
2802 | // TODO(danvk): this is a mess. Rethink this function. | |
c65f2303 | 2803 | if ('rollPeriod' in attrs) { |
6a1aa64f DV |
2804 | this.rollPeriod_ = attrs.rollPeriod; |
2805 | } | |
c65f2303 | 2806 | if ('dateWindow' in attrs) { |
6a1aa64f DV |
2807 | this.dateWindow_ = attrs.dateWindow; |
2808 | } | |
450fe64b DV |
2809 | |
2810 | // TODO(danvk): validate per-series options. | |
46dde5f9 DV |
2811 | // Supported: |
2812 | // strokeWidth | |
2813 | // pointSize | |
2814 | // drawPoints | |
2815 | // highlightCircleSize | |
450fe64b | 2816 | |
fc80a396 | 2817 | Dygraph.update(this.user_attrs_, attrs); |
87bb7958 | 2818 | Dygraph.update(this.renderOptions_, attrs); |
285a6bda DV |
2819 | |
2820 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
2821 | ||
2822 | // TODO(danvk): this doesn't match the constructor logic | |
2823 | this.layout_.updateOptions({ 'errorBars': this.attr_("errorBars") }); | |
5e50289f | 2824 | if (attrs['file']) { |
6a1aa64f DV |
2825 | this.file_ = attrs['file']; |
2826 | this.start_(); | |
2827 | } else { | |
26ca7938 | 2828 | this.predraw_(); |
6a1aa64f DV |
2829 | } |
2830 | }; | |
2831 | ||
2832 | /** | |
697e70b2 DV |
2833 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
2834 | * containing div (which has presumably changed size since the dygraph was | |
2835 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
2836 | * |
2837 | * This is far more efficient than destroying and re-instantiating a | |
2838 | * Dygraph, since it doesn't have to reparse the underlying data. | |
2839 | * | |
697e70b2 DV |
2840 | * @param {Number} width Width (in pixels) |
2841 | * @param {Number} height Height (in pixels) | |
2842 | */ | |
2843 | Dygraph.prototype.resize = function(width, height) { | |
e8c7ef86 DV |
2844 | if (this.resize_lock) { |
2845 | return; | |
2846 | } | |
2847 | this.resize_lock = true; | |
2848 | ||
697e70b2 DV |
2849 | if ((width === null) != (height === null)) { |
2850 | this.warn("Dygraph.resize() should be called with zero parameters or " + | |
2851 | "two non-NULL parameters. Pretending it was zero."); | |
2852 | width = height = null; | |
2853 | } | |
2854 | ||
b16e6369 | 2855 | // TODO(danvk): there should be a clear() method. |
697e70b2 | 2856 | this.maindiv_.innerHTML = ""; |
b16e6369 DV |
2857 | this.attrs_.labelsDiv = null; |
2858 | ||
697e70b2 DV |
2859 | if (width) { |
2860 | this.maindiv_.style.width = width + "px"; | |
2861 | this.maindiv_.style.height = height + "px"; | |
2862 | this.width_ = width; | |
2863 | this.height_ = height; | |
2864 | } else { | |
2865 | this.width_ = this.maindiv_.offsetWidth; | |
2866 | this.height_ = this.maindiv_.offsetHeight; | |
2867 | } | |
2868 | ||
2869 | this.createInterface_(); | |
26ca7938 | 2870 | this.predraw_(); |
e8c7ef86 DV |
2871 | |
2872 | this.resize_lock = false; | |
697e70b2 DV |
2873 | }; |
2874 | ||
2875 | /** | |
3c1d225b | 2876 | * Adjusts the number of points in the rolling average. Updates the graph to |
6a1aa64f | 2877 | * reflect the new averaging period. |
3c1d225b | 2878 | * @param {Number} length Number of points over which to average the data. |
6a1aa64f | 2879 | */ |
285a6bda | 2880 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f | 2881 | this.rollPeriod_ = length; |
26ca7938 | 2882 | this.predraw_(); |
6a1aa64f | 2883 | }; |
540d00f1 | 2884 | |
f8cfec73 | 2885 | /** |
1cf11047 DV |
2886 | * Returns a boolean array of visibility statuses. |
2887 | */ | |
2888 | Dygraph.prototype.visibility = function() { | |
2889 | // Do lazy-initialization, so that this happens after we know the number of | |
2890 | // data series. | |
2891 | if (!this.attr_("visibility")) { | |
f38dec01 | 2892 | this.attrs_["visibility"] = []; |
1cf11047 DV |
2893 | } |
2894 | while (this.attr_("visibility").length < this.rawData_[0].length - 1) { | |
f38dec01 | 2895 | this.attr_("visibility").push(true); |
1cf11047 DV |
2896 | } |
2897 | return this.attr_("visibility"); | |
2898 | }; | |
2899 | ||
2900 | /** | |
2901 | * Changes the visiblity of a series. | |
2902 | */ | |
2903 | Dygraph.prototype.setVisibility = function(num, value) { | |
2904 | var x = this.visibility(); | |
a6c109c1 | 2905 | if (num < 0 || num >= x.length) { |
1cf11047 DV |
2906 | this.warn("invalid series number in setVisibility: " + num); |
2907 | } else { | |
2908 | x[num] = value; | |
26ca7938 | 2909 | this.predraw_(); |
1cf11047 DV |
2910 | } |
2911 | }; | |
2912 | ||
2913 | /** | |
5c528fa2 DV |
2914 | * Update the list of annotations and redraw the chart. |
2915 | */ | |
a685723c | 2916 | Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { |
3c51ab74 DV |
2917 | // Only add the annotation CSS rule once we know it will be used. |
2918 | Dygraph.addAnnotationRule(); | |
5c528fa2 DV |
2919 | this.annotations_ = ann; |
2920 | this.layout_.setAnnotations(this.annotations_); | |
a685723c | 2921 | if (!suppressDraw) { |
26ca7938 | 2922 | this.predraw_(); |
a685723c | 2923 | } |
5c528fa2 DV |
2924 | }; |
2925 | ||
2926 | /** | |
2927 | * Return the list of annotations. | |
2928 | */ | |
2929 | Dygraph.prototype.annotations = function() { | |
2930 | return this.annotations_; | |
2931 | }; | |
2932 | ||
46dde5f9 DV |
2933 | /** |
2934 | * Get the index of a series (column) given its name. The first column is the | |
2935 | * x-axis, so the data series start with index 1. | |
2936 | */ | |
2937 | Dygraph.prototype.indexFromSetName = function(name) { | |
2938 | var labels = this.attr_("labels"); | |
2939 | for (var i = 0; i < labels.length; i++) { | |
2940 | if (labels[i] == name) return i; | |
2941 | } | |
2942 | return null; | |
2943 | }; | |
2944 | ||
5c528fa2 DV |
2945 | Dygraph.addAnnotationRule = function() { |
2946 | if (Dygraph.addedAnnotationCSS) return; | |
2947 | ||
5c528fa2 DV |
2948 | var rule = "border: 1px solid black; " + |
2949 | "background-color: white; " + | |
2950 | "text-align: center;"; | |
22186871 DV |
2951 | |
2952 | var styleSheetElement = document.createElement("style"); | |
2953 | styleSheetElement.type = "text/css"; | |
2954 | document.getElementsByTagName("head")[0].appendChild(styleSheetElement); | |
2955 | ||
2956 | // Find the first style sheet that we can access. | |
2957 | // We may not add a rule to a style sheet from another domain for security | |
2958 | // reasons. This sometimes comes up when using gviz, since the Google gviz JS | |
2959 | // adds its own style sheets from google.com. | |
2960 | for (var i = 0; i < document.styleSheets.length; i++) { | |
2961 | if (document.styleSheets[i].disabled) continue; | |
2962 | var mysheet = document.styleSheets[i]; | |
2963 | try { | |
2964 | if (mysheet.insertRule) { // Firefox | |
2965 | var idx = mysheet.cssRules ? mysheet.cssRules.length : 0; | |
2966 | mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", idx); | |
2967 | } else if (mysheet.addRule) { // IE | |
2968 | mysheet.addRule(".dygraphDefaultAnnotation", rule); | |
2969 | } | |
2970 | Dygraph.addedAnnotationCSS = true; | |
2971 | return; | |
2972 | } catch(err) { | |
2973 | // Was likely a security exception. | |
2974 | } | |
5c528fa2 DV |
2975 | } |
2976 | ||
22186871 | 2977 | this.warn("Unable to add default annotation CSS rule; display may be off."); |
5c528fa2 DV |
2978 | } |
2979 | ||
2980 | /** | |
f8cfec73 DV |
2981 | * Create a new canvas element. This is more complex than a simple |
2982 | * document.createElement("canvas") because of IE and excanvas. | |
2983 | */ | |
2984 | Dygraph.createCanvas = function() { | |
2985 | var canvas = document.createElement("canvas"); | |
2986 | ||
2987 | isIE = (/MSIE/.test(navigator.userAgent) && !window.opera); | |
8b8f2d59 | 2988 | if (isIE && (typeof(G_vmlCanvasManager) != 'undefined')) { |
f8cfec73 DV |
2989 | canvas = G_vmlCanvasManager.initElement(canvas); |
2990 | } | |
2991 | ||
2992 | return canvas; | |
2993 | }; | |
2994 | ||
540d00f1 DV |
2995 | |
2996 | /** | |
285a6bda | 2997 | * A wrapper around Dygraph that implements the gviz API. |
540d00f1 DV |
2998 | * @param {Object} container The DOM object the visualization should live in. |
2999 | */ | |
285a6bda | 3000 | Dygraph.GVizChart = function(container) { |
540d00f1 DV |
3001 | this.container = container; |
3002 | } | |
3003 | ||
285a6bda | 3004 | Dygraph.GVizChart.prototype.draw = function(data, options) { |
c91f4ae8 DV |
3005 | // Clear out any existing dygraph. |
3006 | // TODO(danvk): would it make more sense to simply redraw using the current | |
3007 | // date_graph object? | |
540d00f1 | 3008 | this.container.innerHTML = ''; |
c91f4ae8 DV |
3009 | if (typeof(this.date_graph) != 'undefined') { |
3010 | this.date_graph.destroy(); | |
3011 | } | |
3012 | ||
285a6bda | 3013 | this.date_graph = new Dygraph(this.container, data, options); |
540d00f1 | 3014 | } |
285a6bda | 3015 | |
239c712d NAG |
3016 | /** |
3017 | * Google charts compatible setSelection | |
50360fd0 | 3018 | * Only row selection is supported, all points in the row will be highlighted |
239c712d NAG |
3019 | * @param {Array} array of the selected cells |
3020 | * @public | |
3021 | */ | |
3022 | Dygraph.GVizChart.prototype.setSelection = function(selection_array) { | |
3023 | var row = false; | |
3024 | if (selection_array.length) { | |
3025 | row = selection_array[0].row; | |
3026 | } | |
3027 | this.date_graph.setSelection(row); | |
3028 | } | |
3029 | ||
103b7292 NAG |
3030 | /** |
3031 | * Google charts compatible getSelection implementation | |
3032 | * @return {Array} array of the selected cells | |
3033 | * @public | |
3034 | */ | |
3035 | Dygraph.GVizChart.prototype.getSelection = function() { | |
3036 | var selection = []; | |
50360fd0 | 3037 | |
103b7292 | 3038 | var row = this.date_graph.getSelection(); |
50360fd0 | 3039 | |
103b7292 | 3040 | if (row < 0) return selection; |
50360fd0 | 3041 | |
103b7292 NAG |
3042 | col = 1; |
3043 | for (var i in this.date_graph.layout_.datasets) { | |
3044 | selection.push({row: row, column: col}); | |
3045 | col++; | |
3046 | } | |
3047 | ||
3048 | return selection; | |
3049 | } | |
3050 | ||
285a6bda DV |
3051 | // Older pages may still use this name. |
3052 | DateGraph = Dygraph; |