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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 | ||
15b00ba8 JB |
76 | /** |
77 | * Number formatting function which mimicks the behavior of %g in printf, i.e. | |
78 | * either exponential or fixed format (without trailing 0s) is used depending on | |
79 | * the length of the generated string. The advantage of this format is that | |
80 | * there is a predictable upper bound on the resulting string length and | |
81 | * significant figures are not dropped. | |
82 | * | |
83 | * NOTE: JavaScript's native toPrecision() is NOT a drop-in replacement for %g. | |
84 | * It creates strings which are too long for absolute values between 10^-4 and | |
85 | * 10^-6. See tests/number-format.html for examples. | |
86 | * | |
87 | * @param {Number} x The number to format | |
88 | * @param {Number} opt_precision The precision to use, default 2. | |
89 | * @return {String} A string formatted like %g in printf. The max generated | |
90 | * string length should be precision + | |
91 | */ | |
92 | Dygraph.defaultFormat = function(x, opt_precision) { | |
93 | // Avoid invalid precision values; [1, 21] is the valid range. | |
94 | var p = Math.min(Math.max(1, opt_precision || 2), 21); | |
95 | ||
96 | // This is deceptively simple. The actual algorithm comes from: | |
97 | // | |
98 | // Max allowed length = p + 4 | |
99 | // where 4 comes from 'e+n' and '.'. | |
100 | // | |
101 | // Length of fixed format = 2 + y + p | |
102 | // where 2 comes from '0.' and y = # of leading zeroes. | |
103 | // | |
104 | // Equating the two and solving for y yields y = 2, or 0.00xxxx which is | |
105 | // 1.0e-3. | |
106 | // | |
107 | // Since the behavior of toPrecision() is identical for larger numbers, we | |
108 | // don't have to worry about the other bound. | |
109 | // | |
110 | // Finally, the argument for toExponential() is the number of trailing digits, | |
111 | // so we take off 1 for the value before the '.'. | |
112 | return (Math.abs(x) < 1.0e-3 && x != 0.0) ? | |
113 | x.toExponential(p - 1) : x.toPrecision(p); | |
114 | }; | |
115 | ||
6a1aa64f | 116 | // Various default values |
285a6bda DV |
117 | Dygraph.DEFAULT_ROLL_PERIOD = 1; |
118 | Dygraph.DEFAULT_WIDTH = 480; | |
119 | Dygraph.DEFAULT_HEIGHT = 320; | |
120 | Dygraph.AXIS_LINE_WIDTH = 0.3; | |
6a1aa64f | 121 | |
885c13e4 | 122 | |
8e4a6af3 | 123 | // Default attribute values. |
285a6bda | 124 | Dygraph.DEFAULT_ATTRS = { |
a9fc39ab | 125 | highlightCircleSize: 3, |
8e4a6af3 | 126 | pixelsPerXLabel: 60, |
c6336f04 | 127 | pixelsPerYLabel: 30, |
285a6bda | 128 | |
8e4a6af3 DV |
129 | labelsDivWidth: 250, |
130 | labelsDivStyles: { | |
131 | // TODO(danvk): move defaults from createStatusMessage_ here. | |
285a6bda DV |
132 | }, |
133 | labelsSeparateLines: false, | |
bcd3ebf0 | 134 | labelsShowZeroValues: true, |
285a6bda | 135 | labelsKMB: false, |
afefbcdb | 136 | labelsKMG2: false, |
d160cc3b | 137 | showLabelsOnHighlight: true, |
12e4c741 | 138 | |
15b00ba8 | 139 | yValueFormatter: Dygraph.defaultFormat, |
285a6bda DV |
140 | |
141 | strokeWidth: 1.0, | |
8e4a6af3 | 142 | |
8846615a DV |
143 | axisTickSize: 3, |
144 | axisLabelFontSize: 14, | |
145 | xAxisLabelWidth: 50, | |
146 | yAxisLabelWidth: 50, | |
bf640e56 | 147 | xAxisLabelFormatter: Dygraph.dateAxisFormatter, |
8846615a | 148 | rightGap: 5, |
285a6bda DV |
149 | |
150 | showRoller: false, | |
151 | xValueFormatter: Dygraph.dateString_, | |
152 | xValueParser: Dygraph.dateParser, | |
153 | xTicker: Dygraph.dateTicker, | |
154 | ||
3d67f03b DV |
155 | delimiter: ',', |
156 | ||
ff00d3e2 | 157 | logScale: false, |
285a6bda DV |
158 | sigma: 2.0, |
159 | errorBars: false, | |
160 | fractions: false, | |
161 | wilsonInterval: true, // only relevant if fractions is true | |
5954ef32 | 162 | customBars: false, |
43af96e7 NK |
163 | fillGraph: false, |
164 | fillAlpha: 0.15, | |
f032c51d | 165 | connectSeparatedPoints: false, |
43af96e7 NK |
166 | |
167 | stackedGraph: false, | |
afdc483f NN |
168 | hideOverlayOnMouseOut: true, |
169 | ||
00c281d4 | 170 | stepPlot: false, |
ee672584 | 171 | avoidMinZero: false, |
4f0c5aa0 DV |
172 | |
173 | interactionModel: null // will be set to Dygraph.defaultInteractionModel. | |
285a6bda DV |
174 | }; |
175 | ||
176 | // Various logging levels. | |
177 | Dygraph.DEBUG = 1; | |
178 | Dygraph.INFO = 2; | |
179 | Dygraph.WARNING = 3; | |
180 | Dygraph.ERROR = 3; | |
181 | ||
39b0e098 RK |
182 | // Directions for panning and zooming. Use bit operations when combined |
183 | // values are possible. | |
184 | Dygraph.HORIZONTAL = 1; | |
185 | Dygraph.VERTICAL = 2; | |
186 | ||
5c528fa2 DV |
187 | // Used for initializing annotation CSS rules only once. |
188 | Dygraph.addedAnnotationCSS = false; | |
189 | ||
285a6bda DV |
190 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { |
191 | // Labels is no longer a constructor parameter, since it's typically set | |
192 | // directly from the data source. It also conains a name for the x-axis, | |
193 | // which the previous constructor form did not. | |
194 | if (labels != null) { | |
195 | var new_labels = ["Date"]; | |
196 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); | |
fc80a396 | 197 | Dygraph.update(attrs, { 'labels': new_labels }); |
285a6bda DV |
198 | } |
199 | this.__init__(div, file, attrs); | |
8e4a6af3 DV |
200 | }; |
201 | ||
6a1aa64f | 202 | /** |
285a6bda | 203 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
885c13e4 | 204 | * and context <canvas> inside of it. See the constructor for details. |
6a1aa64f | 205 | * on the parameters. |
12e4c741 | 206 | * @param {Element} div the Element to render the graph into. |
6a1aa64f | 207 | * @param {String | Function} file Source data |
6a1aa64f DV |
208 | * @param {Object} attrs Miscellaneous other options |
209 | * @private | |
210 | */ | |
285a6bda | 211 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
a2c8fff4 DV |
212 | // Hack for IE: if we're using excanvas and the document hasn't finished |
213 | // loading yet (and hence may not have initialized whatever it needs to | |
214 | // initialize), then keep calling this routine periodically until it has. | |
215 | if (/MSIE/.test(navigator.userAgent) && !window.opera && | |
216 | typeof(G_vmlCanvasManager) != 'undefined' && | |
217 | document.readyState != 'complete') { | |
218 | var self = this; | |
219 | setTimeout(function() { self.__init__(div, file, attrs) }, 100); | |
220 | } | |
221 | ||
285a6bda DV |
222 | // Support two-argument constructor |
223 | if (attrs == null) { attrs = {}; } | |
224 | ||
6a1aa64f | 225 | // Copy the important bits into the object |
32988383 | 226 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
6a1aa64f | 227 | this.maindiv_ = div; |
6a1aa64f | 228 | this.file_ = file; |
285a6bda | 229 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
6a1aa64f | 230 | this.previousVerticalX_ = -1; |
6a1aa64f | 231 | this.fractions_ = attrs.fractions || false; |
6a1aa64f | 232 | this.dateWindow_ = attrs.dateWindow || null; |
8b83c6cc | 233 | |
6a1aa64f | 234 | this.wilsonInterval_ = attrs.wilsonInterval || true; |
fe0b7c03 | 235 | this.is_initial_draw_ = true; |
5c528fa2 | 236 | this.annotations_ = []; |
6be8e54c JB |
237 | |
238 | // Number of digits to use when labeling the x (if numeric) and y axis | |
239 | // ticks. | |
240 | this.numXDigits_ = 2; | |
241 | this.numYDigits_ = 2; | |
242 | ||
243 | // When labeling x (if numeric) or y values in the legend, there are | |
244 | // numDigits + numExtraDigits of precision used. For axes labels with N | |
245 | // digits of precision, the data should be displayed with at least N+1 digits | |
246 | // of precision. The reason for this is to divide each interval between | |
247 | // successive ticks into tenths (for 1) or hundredths (for 2), etc. For | |
248 | // example, if the labels are [0, 1, 2], we want data to be displayed as | |
249 | // 0.1, 1.3, etc. | |
250 | this.numExtraDigits_ = 1; | |
8e4a6af3 | 251 | |
f7d6278e DV |
252 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
253 | // div, then only one will be drawn. | |
254 | div.innerHTML = ""; | |
255 | ||
c21d2c2d | 256 | // If the div isn't already sized then inherit from our attrs or |
257 | // give it a default size. | |
285a6bda | 258 | if (div.style.width == '') { |
ddd1b11f | 259 | div.style.width = (attrs.width || Dygraph.DEFAULT_WIDTH) + "px"; |
285a6bda DV |
260 | } |
261 | if (div.style.height == '') { | |
ddd1b11f | 262 | div.style.height = (attrs.height || Dygraph.DEFAULT_HEIGHT) + "px"; |
32988383 | 263 | } |
285a6bda DV |
264 | this.width_ = parseInt(div.style.width, 10); |
265 | this.height_ = parseInt(div.style.height, 10); | |
c21d2c2d | 266 | // The div might have been specified as percent of the current window size, |
267 | // convert that to an appropriate number of pixels. | |
268 | if (div.style.width.indexOf("%") == div.style.width.length - 1) { | |
c6f45033 | 269 | this.width_ = div.offsetWidth; |
c21d2c2d | 270 | } |
271 | if (div.style.height.indexOf("%") == div.style.height.length - 1) { | |
c6f45033 | 272 | this.height_ = div.offsetHeight; |
c21d2c2d | 273 | } |
32988383 | 274 | |
10a6456d DV |
275 | if (this.width_ == 0) { |
276 | this.error("dygraph has zero width. Please specify a width in pixels."); | |
277 | } | |
278 | if (this.height_ == 0) { | |
279 | this.error("dygraph has zero height. Please specify a height in pixels."); | |
280 | } | |
281 | ||
344ba8c0 | 282 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
43af96e7 NK |
283 | if (attrs['stackedGraph']) { |
284 | attrs['fillGraph'] = true; | |
285 | // TODO(nikhilk): Add any other stackedGraph checks here. | |
286 | } | |
287 | ||
285a6bda DV |
288 | // Dygraphs has many options, some of which interact with one another. |
289 | // To keep track of everything, we maintain two sets of options: | |
290 | // | |
c21d2c2d | 291 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
292 | // this.attrs_ defaults, options derived from user_attrs_, data. |
293 | // | |
294 | // Options are then accessed this.attr_('attr'), which first looks at | |
295 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
296 | // defaults without overriding behavior that the user specifically asks for. | |
297 | this.user_attrs_ = {}; | |
fc80a396 | 298 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 299 | |
285a6bda | 300 | this.attrs_ = {}; |
fc80a396 | 301 | Dygraph.update(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 302 | |
16269f6e | 303 | this.boundaryIds_ = []; |
6a1aa64f | 304 | |
285a6bda DV |
305 | // Make a note of whether labels will be pulled from the CSV file. |
306 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
6a1aa64f DV |
307 | |
308 | // Create the containing DIV and other interactive elements | |
309 | this.createInterface_(); | |
310 | ||
738fc797 | 311 | this.start_(); |
6a1aa64f DV |
312 | }; |
313 | ||
227b93cc DV |
314 | Dygraph.prototype.attr_ = function(name, seriesName) { |
315 | if (seriesName && | |
316 | typeof(this.user_attrs_[seriesName]) != 'undefined' && | |
317 | this.user_attrs_[seriesName] != null && | |
318 | typeof(this.user_attrs_[seriesName][name]) != 'undefined') { | |
319 | return this.user_attrs_[seriesName][name]; | |
450fe64b | 320 | } else if (typeof(this.user_attrs_[name]) != 'undefined') { |
285a6bda DV |
321 | return this.user_attrs_[name]; |
322 | } else if (typeof(this.attrs_[name]) != 'undefined') { | |
323 | return this.attrs_[name]; | |
324 | } else { | |
325 | return null; | |
326 | } | |
327 | }; | |
328 | ||
329 | // TODO(danvk): any way I can get the line numbers to be this.warn call? | |
330 | Dygraph.prototype.log = function(severity, message) { | |
331 | if (typeof(console) != 'undefined') { | |
332 | switch (severity) { | |
333 | case Dygraph.DEBUG: | |
334 | console.debug('dygraphs: ' + message); | |
335 | break; | |
336 | case Dygraph.INFO: | |
337 | console.info('dygraphs: ' + message); | |
338 | break; | |
339 | case Dygraph.WARNING: | |
340 | console.warn('dygraphs: ' + message); | |
341 | break; | |
342 | case Dygraph.ERROR: | |
343 | console.error('dygraphs: ' + message); | |
344 | break; | |
345 | } | |
346 | } | |
347 | } | |
348 | Dygraph.prototype.info = function(message) { | |
349 | this.log(Dygraph.INFO, message); | |
350 | } | |
351 | Dygraph.prototype.warn = function(message) { | |
352 | this.log(Dygraph.WARNING, message); | |
353 | } | |
354 | Dygraph.prototype.error = function(message) { | |
355 | this.log(Dygraph.ERROR, message); | |
356 | } | |
357 | ||
6a1aa64f DV |
358 | /** |
359 | * Returns the current rolling period, as set by the user or an option. | |
33aaaca3 | 360 | * @return {Number} The number of days in the rolling window |
6a1aa64f | 361 | */ |
285a6bda | 362 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 363 | return this.rollPeriod_; |
76171648 DV |
364 | }; |
365 | ||
599fb4ad DV |
366 | /** |
367 | * Returns the currently-visible x-range. This can be affected by zooming, | |
368 | * panning or a call to updateOptions. | |
369 | * Returns a two-element array: [left, right]. | |
370 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
371 | */ | |
372 | Dygraph.prototype.xAxisRange = function() { | |
373 | if (this.dateWindow_) return this.dateWindow_; | |
374 | ||
375 | // The entire chart is visible. | |
376 | var left = this.rawData_[0][0]; | |
377 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
378 | return [left, right]; | |
379 | }; | |
380 | ||
3230c662 | 381 | /** |
d58ae307 DV |
382 | * Returns the currently-visible y-range for an axis. This can be affected by |
383 | * zooming, panning or a call to updateOptions. Axis indices are zero-based. If | |
384 | * called with no arguments, returns the range of the first axis. | |
3230c662 DV |
385 | * Returns a two-element array: [bottom, top]. |
386 | */ | |
d58ae307 | 387 | Dygraph.prototype.yAxisRange = function(idx) { |
d63e6799 | 388 | if (typeof(idx) == "undefined") idx = 0; |
d58ae307 DV |
389 | if (idx < 0 || idx >= this.axes_.length) return null; |
390 | return [ this.axes_[idx].computedValueRange[0], | |
391 | this.axes_[idx].computedValueRange[1] ]; | |
392 | }; | |
393 | ||
394 | /** | |
395 | * Returns the currently-visible y-ranges for each axis. This can be affected by | |
396 | * zooming, panning, calls to updateOptions, etc. | |
397 | * Returns an array of [bottom, top] pairs, one for each y-axis. | |
398 | */ | |
399 | Dygraph.prototype.yAxisRanges = function() { | |
400 | var ret = []; | |
401 | for (var i = 0; i < this.axes_.length; i++) { | |
402 | ret.push(this.yAxisRange(i)); | |
403 | } | |
404 | return ret; | |
3230c662 DV |
405 | }; |
406 | ||
d58ae307 | 407 | // TODO(danvk): use these functions throughout dygraphs. |
3230c662 DV |
408 | /** |
409 | * Convert from data coordinates to canvas/div X/Y coordinates. | |
d58ae307 DV |
410 | * If specified, do this conversion for the coordinate system of a particular |
411 | * axis. Uses the first axis by default. | |
3230c662 DV |
412 | * Returns a two-element array: [X, Y] |
413 | */ | |
d58ae307 | 414 | Dygraph.prototype.toDomCoords = function(x, y, axis) { |
3230c662 DV |
415 | var ret = [null, null]; |
416 | var area = this.plotter_.area; | |
417 | if (x !== null) { | |
418 | var xRange = this.xAxisRange(); | |
419 | ret[0] = area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; | |
420 | } | |
421 | ||
422 | if (y !== null) { | |
d58ae307 | 423 | var yRange = this.yAxisRange(axis); |
891ad846 | 424 | ret[1] = area.y + (yRange[1] - y) / (yRange[1] - yRange[0]) * area.h; |
3230c662 DV |
425 | } |
426 | ||
427 | return ret; | |
428 | }; | |
429 | ||
430 | /** | |
431 | * Convert from canvas/div coords to data coordinates. | |
d58ae307 DV |
432 | * If specified, do this conversion for the coordinate system of a particular |
433 | * axis. Uses the first axis by default. | |
3230c662 DV |
434 | * Returns a two-element array: [X, Y] |
435 | */ | |
d58ae307 | 436 | Dygraph.prototype.toDataCoords = function(x, y, axis) { |
3230c662 DV |
437 | var ret = [null, null]; |
438 | var area = this.plotter_.area; | |
439 | if (x !== null) { | |
440 | var xRange = this.xAxisRange(); | |
441 | ret[0] = xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); | |
442 | } | |
443 | ||
444 | if (y !== null) { | |
d58ae307 | 445 | var yRange = this.yAxisRange(axis); |
3230c662 DV |
446 | ret[1] = yRange[0] + (area.h - y) / area.h * (yRange[1] - yRange[0]); |
447 | } | |
448 | ||
449 | return ret; | |
450 | }; | |
451 | ||
e99fde05 DV |
452 | /** |
453 | * Returns the number of columns (including the independent variable). | |
454 | */ | |
455 | Dygraph.prototype.numColumns = function() { | |
456 | return this.rawData_[0].length; | |
457 | }; | |
458 | ||
459 | /** | |
460 | * Returns the number of rows (excluding any header/label row). | |
461 | */ | |
462 | Dygraph.prototype.numRows = function() { | |
463 | return this.rawData_.length; | |
464 | }; | |
465 | ||
466 | /** | |
467 | * Returns the value in the given row and column. If the row and column exceed | |
468 | * the bounds on the data, returns null. Also returns null if the value is | |
469 | * missing. | |
470 | */ | |
471 | Dygraph.prototype.getValue = function(row, col) { | |
472 | if (row < 0 || row > this.rawData_.length) return null; | |
473 | if (col < 0 || col > this.rawData_[row].length) return null; | |
474 | ||
475 | return this.rawData_[row][col]; | |
476 | }; | |
477 | ||
76171648 DV |
478 | Dygraph.addEvent = function(el, evt, fn) { |
479 | var normed_fn = function(e) { | |
480 | if (!e) var e = window.event; | |
481 | fn(e); | |
482 | }; | |
483 | if (window.addEventListener) { // Mozilla, Netscape, Firefox | |
484 | el.addEventListener(evt, normed_fn, false); | |
485 | } else { // IE | |
486 | el.attachEvent('on' + evt, normed_fn); | |
487 | } | |
488 | }; | |
6a1aa64f | 489 | |
ee672584 | 490 | |
ee672584 RK |
491 | // Based on the article at |
492 | // http://www.switchonthecode.com/tutorials/javascript-tutorial-the-scroll-wheel | |
ee672584 RK |
493 | Dygraph.cancelEvent = function(e) { |
494 | e = e ? e : window.event; | |
495 | if (e.stopPropagation) { | |
496 | e.stopPropagation(); | |
497 | } | |
498 | if (e.preventDefault) { | |
499 | e.preventDefault(); | |
500 | } | |
501 | e.cancelBubble = true; | |
502 | e.cancel = true; | |
503 | e.returnValue = false; | |
504 | return false; | |
505 | } | |
506 | ||
6a1aa64f | 507 | /** |
285a6bda | 508 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 509 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 510 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
511 | * @private |
512 | */ | |
285a6bda | 513 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
514 | // Create the all-enclosing graph div |
515 | var enclosing = this.maindiv_; | |
516 | ||
b0c3b730 DV |
517 | this.graphDiv = document.createElement("div"); |
518 | this.graphDiv.style.width = this.width_ + "px"; | |
519 | this.graphDiv.style.height = this.height_ + "px"; | |
520 | enclosing.appendChild(this.graphDiv); | |
521 | ||
522 | // Create the canvas for interactive parts of the chart. | |
f8cfec73 | 523 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 DV |
524 | this.canvas_.style.position = "absolute"; |
525 | this.canvas_.width = this.width_; | |
526 | this.canvas_.height = this.height_; | |
f8cfec73 DV |
527 | this.canvas_.style.width = this.width_ + "px"; // for IE |
528 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
b0c3b730 DV |
529 | |
530 | // ... and for static parts of the chart. | |
6a1aa64f | 531 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
76171648 | 532 | |
eb7bf005 EC |
533 | // The interactive parts of the graph are drawn on top of the chart. |
534 | this.graphDiv.appendChild(this.hidden_); | |
535 | this.graphDiv.appendChild(this.canvas_); | |
536 | this.mouseEventElement_ = this.canvas_; | |
537 | ||
76171648 | 538 | var dygraph = this; |
eb7bf005 | 539 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(e) { |
76171648 DV |
540 | dygraph.mouseMove_(e); |
541 | }); | |
eb7bf005 | 542 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(e) { |
76171648 DV |
543 | dygraph.mouseOut_(e); |
544 | }); | |
697e70b2 DV |
545 | |
546 | // Create the grapher | |
547 | // TODO(danvk): why does the Layout need its own set of options? | |
548 | this.layoutOptions_ = { 'xOriginIsZero': false }; | |
549 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
550 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
551 | Dygraph.update(this.layoutOptions_, { | |
552 | 'errorBars': (this.attr_("errorBars") || this.attr_("customBars")) }); | |
553 | ||
554 | this.layout_ = new DygraphLayout(this, this.layoutOptions_); | |
555 | ||
556 | // TODO(danvk): why does the Renderer need its own set of options? | |
557 | this.renderOptions_ = { colorScheme: this.colors_, | |
558 | strokeColor: null, | |
559 | axisLineWidth: Dygraph.AXIS_LINE_WIDTH }; | |
560 | Dygraph.update(this.renderOptions_, this.attrs_); | |
561 | Dygraph.update(this.renderOptions_, this.user_attrs_); | |
697e70b2 DV |
562 | |
563 | this.createStatusMessage_(); | |
697e70b2 | 564 | this.createDragInterface_(); |
4cfcc38c DV |
565 | }; |
566 | ||
567 | /** | |
568 | * Detach DOM elements in the dygraph and null out all data references. | |
569 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
570 | * usage. See, e.g., the tests/perf.html example. | |
571 | */ | |
572 | Dygraph.prototype.destroy = function() { | |
573 | var removeRecursive = function(node) { | |
574 | while (node.hasChildNodes()) { | |
575 | removeRecursive(node.firstChild); | |
576 | node.removeChild(node.firstChild); | |
577 | } | |
578 | }; | |
579 | removeRecursive(this.maindiv_); | |
580 | ||
581 | var nullOut = function(obj) { | |
582 | for (var n in obj) { | |
583 | if (typeof(obj[n]) === 'object') { | |
584 | obj[n] = null; | |
585 | } | |
586 | } | |
587 | }; | |
588 | ||
589 | // These may not all be necessary, but it can't hurt... | |
590 | nullOut(this.layout_); | |
591 | nullOut(this.plotter_); | |
592 | nullOut(this); | |
593 | }; | |
6a1aa64f DV |
594 | |
595 | /** | |
596 | * Creates the canvas containing the PlotKit graph. Only plotkit ever draws on | |
285a6bda | 597 | * this particular canvas. All Dygraph work is done on this.canvas_. |
8846615a | 598 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
599 | * @return {Object} The newly-created canvas |
600 | * @private | |
601 | */ | |
285a6bda | 602 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 | 603 | var h = Dygraph.createCanvas(); |
6a1aa64f | 604 | h.style.position = "absolute"; |
9ac5e4ae DV |
605 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
606 | // some extra area to make it easier to zoom in on the far left and far | |
607 | // right. h needs to be precisely the plot area, so that clipping occurs. | |
6a1aa64f DV |
608 | h.style.top = canvas.style.top; |
609 | h.style.left = canvas.style.left; | |
610 | h.width = this.width_; | |
611 | h.height = this.height_; | |
f8cfec73 DV |
612 | h.style.width = this.width_ + "px"; // for IE |
613 | h.style.height = this.height_ + "px"; // for IE | |
6a1aa64f DV |
614 | return h; |
615 | }; | |
616 | ||
f474c2a3 DV |
617 | // Taken from MochiKit.Color |
618 | Dygraph.hsvToRGB = function (hue, saturation, value) { | |
619 | var red; | |
620 | var green; | |
621 | var blue; | |
622 | if (saturation === 0) { | |
623 | red = value; | |
624 | green = value; | |
625 | blue = value; | |
626 | } else { | |
627 | var i = Math.floor(hue * 6); | |
628 | var f = (hue * 6) - i; | |
629 | var p = value * (1 - saturation); | |
630 | var q = value * (1 - (saturation * f)); | |
631 | var t = value * (1 - (saturation * (1 - f))); | |
632 | switch (i) { | |
633 | case 1: red = q; green = value; blue = p; break; | |
634 | case 2: red = p; green = value; blue = t; break; | |
635 | case 3: red = p; green = q; blue = value; break; | |
636 | case 4: red = t; green = p; blue = value; break; | |
637 | case 5: red = value; green = p; blue = q; break; | |
638 | case 6: // fall through | |
639 | case 0: red = value; green = t; blue = p; break; | |
640 | } | |
641 | } | |
642 | red = Math.floor(255 * red + 0.5); | |
643 | green = Math.floor(255 * green + 0.5); | |
644 | blue = Math.floor(255 * blue + 0.5); | |
645 | return 'rgb(' + red + ',' + green + ',' + blue + ')'; | |
646 | }; | |
647 | ||
648 | ||
6a1aa64f DV |
649 | /** |
650 | * Generate a set of distinct colors for the data series. This is done with a | |
651 | * color wheel. Saturation/Value are customizable, and the hue is | |
652 | * equally-spaced around the color wheel. If a custom set of colors is | |
653 | * specified, that is used instead. | |
6a1aa64f DV |
654 | * @private |
655 | */ | |
285a6bda DV |
656 | Dygraph.prototype.setColors_ = function() { |
657 | // TODO(danvk): compute this directly into this.attrs_['colorScheme'] and do | |
658 | // away with this.renderOptions_. | |
659 | var num = this.attr_("labels").length - 1; | |
6a1aa64f | 660 | this.colors_ = []; |
285a6bda DV |
661 | var colors = this.attr_('colors'); |
662 | if (!colors) { | |
663 | var sat = this.attr_('colorSaturation') || 1.0; | |
664 | var val = this.attr_('colorValue') || 0.5; | |
2aa21213 | 665 | var half = Math.ceil(num / 2); |
6a1aa64f | 666 | for (var i = 1; i <= num; i++) { |
ec1959eb | 667 | if (!this.visibility()[i-1]) continue; |
43af96e7 | 668 | // alternate colors for high contrast. |
2aa21213 | 669 | var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2); |
43af96e7 NK |
670 | var hue = (1.0 * idx/ (1 + num)); |
671 | this.colors_.push(Dygraph.hsvToRGB(hue, sat, val)); | |
6a1aa64f DV |
672 | } |
673 | } else { | |
674 | for (var i = 0; i < num; i++) { | |
ec1959eb | 675 | if (!this.visibility()[i]) continue; |
285a6bda | 676 | var colorStr = colors[i % colors.length]; |
f474c2a3 | 677 | this.colors_.push(colorStr); |
6a1aa64f DV |
678 | } |
679 | } | |
285a6bda | 680 | |
c21d2c2d | 681 | // TODO(danvk): update this w/r/t/ the new options system. |
285a6bda | 682 | this.renderOptions_.colorScheme = this.colors_; |
fc80a396 DV |
683 | Dygraph.update(this.plotter_.options, this.renderOptions_); |
684 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
685 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
6a1aa64f DV |
686 | } |
687 | ||
43af96e7 NK |
688 | /** |
689 | * Return the list of colors. This is either the list of colors passed in the | |
690 | * attributes, or the autogenerated list of rgb(r,g,b) strings. | |
691 | * @return {Array<string>} The list of colors. | |
692 | */ | |
693 | Dygraph.prototype.getColors = function() { | |
694 | return this.colors_; | |
695 | }; | |
696 | ||
5e60386d DV |
697 | // The following functions are from quirksmode.org with a modification for Safari from |
698 | // http://blog.firetree.net/2005/07/04/javascript-find-position/ | |
3df0ccf0 DV |
699 | // http://www.quirksmode.org/js/findpos.html |
700 | Dygraph.findPosX = function(obj) { | |
701 | var curleft = 0; | |
5e60386d | 702 | if(obj.offsetParent) |
50360fd0 | 703 | while(1) |
5e60386d | 704 | { |
3df0ccf0 | 705 | curleft += obj.offsetLeft; |
5e60386d DV |
706 | if(!obj.offsetParent) |
707 | break; | |
3df0ccf0 DV |
708 | obj = obj.offsetParent; |
709 | } | |
5e60386d | 710 | else if(obj.x) |
3df0ccf0 DV |
711 | curleft += obj.x; |
712 | return curleft; | |
713 | }; | |
c21d2c2d | 714 | |
3df0ccf0 DV |
715 | Dygraph.findPosY = function(obj) { |
716 | var curtop = 0; | |
5e60386d DV |
717 | if(obj.offsetParent) |
718 | while(1) | |
719 | { | |
3df0ccf0 | 720 | curtop += obj.offsetTop; |
5e60386d DV |
721 | if(!obj.offsetParent) |
722 | break; | |
3df0ccf0 DV |
723 | obj = obj.offsetParent; |
724 | } | |
5e60386d | 725 | else if(obj.y) |
3df0ccf0 DV |
726 | curtop += obj.y; |
727 | return curtop; | |
728 | }; | |
729 | ||
5e60386d | 730 | |
71a11a8e | 731 | |
6a1aa64f DV |
732 | /** |
733 | * Create the div that contains information on the selected point(s) | |
734 | * This goes in the top right of the canvas, unless an external div has already | |
735 | * been specified. | |
736 | * @private | |
737 | */ | |
fedbd797 | 738 | Dygraph.prototype.createStatusMessage_ = function() { |
739 | var userLabelsDiv = this.user_attrs_["labelsDiv"]; | |
740 | if (userLabelsDiv && null != userLabelsDiv | |
741 | && (typeof(userLabelsDiv) == "string" || userLabelsDiv instanceof String)) { | |
742 | this.user_attrs_["labelsDiv"] = document.getElementById(userLabelsDiv); | |
743 | } | |
285a6bda DV |
744 | if (!this.attr_("labelsDiv")) { |
745 | var divWidth = this.attr_('labelsDivWidth'); | |
b0c3b730 | 746 | var messagestyle = { |
6a1aa64f DV |
747 | "position": "absolute", |
748 | "fontSize": "14px", | |
749 | "zIndex": 10, | |
750 | "width": divWidth + "px", | |
751 | "top": "0px", | |
8846615a | 752 | "left": (this.width_ - divWidth - 2) + "px", |
6a1aa64f DV |
753 | "background": "white", |
754 | "textAlign": "left", | |
b0c3b730 | 755 | "overflow": "hidden"}; |
fc80a396 | 756 | Dygraph.update(messagestyle, this.attr_('labelsDivStyles')); |
b0c3b730 DV |
757 | var div = document.createElement("div"); |
758 | for (var name in messagestyle) { | |
85b99f0b DV |
759 | if (messagestyle.hasOwnProperty(name)) { |
760 | div.style[name] = messagestyle[name]; | |
761 | } | |
b0c3b730 DV |
762 | } |
763 | this.graphDiv.appendChild(div); | |
285a6bda | 764 | this.attrs_.labelsDiv = div; |
6a1aa64f DV |
765 | } |
766 | }; | |
767 | ||
768 | /** | |
0abfbd7e DV |
769 | * Position the labels div so that its right edge is flush with the right edge |
770 | * of the charting area. | |
771 | */ | |
772 | Dygraph.prototype.positionLabelsDiv_ = function() { | |
773 | // Don't touch a user-specified labelsDiv. | |
774 | if (this.user_attrs_.hasOwnProperty("labelsDiv")) return; | |
775 | ||
776 | var area = this.plotter_.area; | |
777 | var div = this.attr_("labelsDiv"); | |
8c21adcf | 778 | div.style.left = area.x + area.w - this.attr_("labelsDivWidth") - 1 + "px"; |
0abfbd7e DV |
779 | }; |
780 | ||
781 | /** | |
6a1aa64f | 782 | * Create the text box to adjust the averaging period |
6a1aa64f DV |
783 | * @private |
784 | */ | |
285a6bda | 785 | Dygraph.prototype.createRollInterface_ = function() { |
8c69de65 DV |
786 | // Create a roller if one doesn't exist already. |
787 | if (!this.roller_) { | |
788 | this.roller_ = document.createElement("input"); | |
789 | this.roller_.type = "text"; | |
790 | this.roller_.style.display = "none"; | |
791 | this.graphDiv.appendChild(this.roller_); | |
792 | } | |
793 | ||
794 | var display = this.attr_('showRoller') ? 'block' : 'none'; | |
26ca7938 | 795 | |
b0c3b730 DV |
796 | var textAttr = { "position": "absolute", |
797 | "zIndex": 10, | |
798 | "top": (this.plotter_.area.h - 25) + "px", | |
799 | "left": (this.plotter_.area.x + 1) + "px", | |
800 | "display": display | |
6a1aa64f | 801 | }; |
8c69de65 DV |
802 | this.roller_.size = "2"; |
803 | this.roller_.value = this.rollPeriod_; | |
b0c3b730 | 804 | for (var name in textAttr) { |
85b99f0b | 805 | if (textAttr.hasOwnProperty(name)) { |
8c69de65 | 806 | this.roller_.style[name] = textAttr[name]; |
85b99f0b | 807 | } |
b0c3b730 DV |
808 | } |
809 | ||
76171648 | 810 | var dygraph = this; |
8c69de65 | 811 | this.roller_.onchange = function() { dygraph.adjustRoll(dygraph.roller_.value); }; |
76171648 DV |
812 | }; |
813 | ||
814 | // These functions are taken from MochiKit.Signal | |
815 | Dygraph.pageX = function(e) { | |
816 | if (e.pageX) { | |
817 | return (!e.pageX || e.pageX < 0) ? 0 : e.pageX; | |
818 | } else { | |
819 | var de = document; | |
820 | var b = document.body; | |
821 | return e.clientX + | |
822 | (de.scrollLeft || b.scrollLeft) - | |
823 | (de.clientLeft || 0); | |
824 | } | |
825 | }; | |
826 | ||
827 | Dygraph.pageY = function(e) { | |
828 | if (e.pageY) { | |
829 | return (!e.pageY || e.pageY < 0) ? 0 : e.pageY; | |
830 | } else { | |
831 | var de = document; | |
832 | var b = document.body; | |
833 | return e.clientY + | |
834 | (de.scrollTop || b.scrollTop) - | |
835 | (de.clientTop || 0); | |
836 | } | |
837 | }; | |
6a1aa64f | 838 | |
ee672584 RK |
839 | Dygraph.prototype.dragGetX_ = function(e, context) { |
840 | return Dygraph.pageX(e) - context.px | |
841 | }; | |
e3489f4f | 842 | |
ee672584 RK |
843 | Dygraph.prototype.dragGetY_ = function(e, context) { |
844 | return Dygraph.pageY(e) - context.py | |
845 | }; | |
e3489f4f | 846 | |
885c13e4 RK |
847 | // Called in response to an interaction model operation that |
848 | // should start the default panning behavior. | |
849 | // | |
850 | // It's used in the default callback for "mousedown" operations. | |
851 | // Custom interaction model builders can use it to provide the default | |
852 | // panning behavior. | |
853 | // | |
ee672584 RK |
854 | Dygraph.startPan = function(event, g, context) { |
855 | // have to be zoomed in to pan. | |
0a52ab7a RK |
856 | // TODO(konigsberg): Let's loosen this zoom-to-pan restriction, also |
857 | // perhaps create panning boundaries? A more flexible pan would make it, | |
858 | // ahem, 'pan-useful'. | |
ee672584 RK |
859 | var zoomedY = false; |
860 | for (var i = 0; i < g.axes_.length; i++) { | |
861 | if (g.axes_[i].valueWindow || g.axes_[i].valueRange) { | |
862 | zoomedY = true; | |
863 | break; | |
864 | } | |
865 | } | |
866 | if (!g.dateWindow_ && !zoomedY) return; | |
867 | ||
868 | context.isPanning = true; | |
869 | var xRange = g.xAxisRange(); | |
870 | context.dateRange = xRange[1] - xRange[0]; | |
871 | ||
872 | // Record the range of each y-axis at the start of the drag. | |
873 | // If any axis has a valueRange or valueWindow, then we want a 2D pan. | |
874 | context.is2DPan = false; | |
875 | for (var i = 0; i < g.axes_.length; i++) { | |
876 | var axis = g.axes_[i]; | |
877 | var yRange = g.yAxisRange(i); | |
878 | axis.dragValueRange = yRange[1] - yRange[0]; | |
879 | var r = g.toDataCoords(null, context.dragStartY, i); | |
880 | axis.draggingValue = r[1]; | |
881 | if (axis.valueWindow || axis.valueRange) context.is2DPan = true; | |
882 | } | |
6a1aa64f | 883 | |
ee672584 RK |
884 | // TODO(konigsberg): Switch from all this math to toDataCoords? |
885 | // Seems to work for the dragging value. | |
886 | context.draggingDate = (context.dragStartX / g.width_) * context.dateRange + xRange[0]; | |
887 | }; | |
6a1aa64f | 888 | |
885c13e4 RK |
889 | // Called in response to an interaction model operation that |
890 | // responds to an event that pans the view. | |
891 | // | |
892 | // It's used in the default callback for "mousemove" operations. | |
893 | // Custom interaction model builders can use it to provide the default | |
894 | // panning behavior. | |
895 | // | |
ee672584 RK |
896 | Dygraph.movePan = function(event, g, context) { |
897 | context.dragEndX = g.dragGetX_(event, context); | |
898 | context.dragEndY = g.dragGetY_(event, context); | |
bce01b0f | 899 | |
d58ae307 | 900 | // TODO(danvk): update this comment |
ee672584 RK |
901 | // Want to have it so that: |
902 | // 1. draggingDate appears at dragEndX, draggingValue appears at dragEndY. | |
903 | // 2. daterange = (dateWindow_[1] - dateWindow_[0]) is unaltered. | |
904 | // 3. draggingValue appears at dragEndY. | |
905 | // 4. valueRange is unaltered. | |
906 | ||
907 | var minDate = context.draggingDate - (context.dragEndX / g.width_) * context.dateRange; | |
908 | var maxDate = minDate + context.dateRange; | |
909 | g.dateWindow_ = [minDate, maxDate]; | |
910 | ||
911 | // y-axis scaling is automatic unless this is a full 2D pan. | |
912 | if (context.is2DPan) { | |
913 | // Adjust each axis appropriately. | |
914 | var y_frac = context.dragEndY / g.height_; | |
915 | for (var i = 0; i < g.axes_.length; i++) { | |
916 | var axis = g.axes_[i]; | |
917 | var maxValue = axis.draggingValue + y_frac * axis.dragValueRange; | |
918 | var minValue = maxValue - axis.dragValueRange; | |
919 | axis.valueWindow = [ minValue, maxValue ]; | |
6a1aa64f | 920 | } |
ee672584 | 921 | } |
6a1aa64f | 922 | |
ee672584 RK |
923 | g.drawGraph_(); |
924 | } | |
79b3ee42 | 925 | |
885c13e4 RK |
926 | // Called in response to an interaction model operation that |
927 | // responds to an event that ends panning. | |
928 | // | |
929 | // It's used in the default callback for "mouseup" operations. | |
930 | // Custom interaction model builders can use it to provide the default | |
931 | // panning behavior. | |
932 | // | |
ee672584 RK |
933 | Dygraph.endPan = function(event, g, context) { |
934 | context.isPanning = false; | |
935 | context.is2DPan = false; | |
936 | context.draggingDate = null; | |
937 | context.dateRange = null; | |
938 | context.valueRange = null; | |
939 | } | |
bce01b0f | 940 | |
885c13e4 RK |
941 | // Called in response to an interaction model operation that |
942 | // responds to an event that starts zooming. | |
943 | // | |
944 | // It's used in the default callback for "mousedown" operations. | |
945 | // Custom interaction model builders can use it to provide the default | |
946 | // zooming behavior. | |
947 | // | |
ee672584 RK |
948 | Dygraph.startZoom = function(event, g, context) { |
949 | context.isZooming = true; | |
950 | } | |
951 | ||
885c13e4 RK |
952 | // Called in response to an interaction model operation that |
953 | // responds to an event that defines zoom boundaries. | |
954 | // | |
955 | // It's used in the default callback for "mousemove" operations. | |
956 | // Custom interaction model builders can use it to provide the default | |
957 | // zooming behavior. | |
958 | // | |
ee672584 RK |
959 | Dygraph.moveZoom = function(event, g, context) { |
960 | context.dragEndX = g.dragGetX_(event, context); | |
961 | context.dragEndY = g.dragGetY_(event, context); | |
962 | ||
963 | var xDelta = Math.abs(context.dragStartX - context.dragEndX); | |
964 | var yDelta = Math.abs(context.dragStartY - context.dragEndY); | |
965 | ||
966 | // drag direction threshold for y axis is twice as large as x axis | |
967 | context.dragDirection = (xDelta < yDelta / 2) ? Dygraph.VERTICAL : Dygraph.HORIZONTAL; | |
968 | ||
969 | g.drawZoomRect_( | |
970 | context.dragDirection, | |
971 | context.dragStartX, | |
972 | context.dragEndX, | |
973 | context.dragStartY, | |
974 | context.dragEndY, | |
975 | context.prevDragDirection, | |
976 | context.prevEndX, | |
977 | context.prevEndY); | |
978 | ||
979 | context.prevEndX = context.dragEndX; | |
980 | context.prevEndY = context.dragEndY; | |
981 | context.prevDragDirection = context.dragDirection; | |
982 | } | |
983 | ||
885c13e4 RK |
984 | // Called in response to an interaction model operation that |
985 | // responds to an event that performs a zoom based on previously defined | |
986 | // bounds.. | |
987 | // | |
988 | // It's used in the default callback for "mouseup" operations. | |
989 | // Custom interaction model builders can use it to provide the default | |
990 | // zooming behavior. | |
991 | // | |
ee672584 RK |
992 | Dygraph.endZoom = function(event, g, context) { |
993 | context.isZooming = false; | |
994 | context.dragEndX = g.dragGetX_(event, context); | |
995 | context.dragEndY = g.dragGetY_(event, context); | |
996 | var regionWidth = Math.abs(context.dragEndX - context.dragStartX); | |
997 | var regionHeight = Math.abs(context.dragEndY - context.dragStartY); | |
998 | ||
999 | if (regionWidth < 2 && regionHeight < 2 && | |
1000 | g.lastx_ != undefined && g.lastx_ != -1) { | |
1001 | // TODO(danvk): pass along more info about the points, e.g. 'x' | |
1002 | if (g.attr_('clickCallback') != null) { | |
1003 | g.attr_('clickCallback')(event, g.lastx_, g.selPoints_); | |
1004 | } | |
1005 | if (g.attr_('pointClickCallback')) { | |
1006 | // check if the click was on a particular point. | |
1007 | var closestIdx = -1; | |
1008 | var closestDistance = 0; | |
1009 | for (var i = 0; i < g.selPoints_.length; i++) { | |
1010 | var p = g.selPoints_[i]; | |
1011 | var distance = Math.pow(p.canvasx - context.dragEndX, 2) + | |
1012 | Math.pow(p.canvasy - context.dragEndY, 2); | |
1013 | if (closestIdx == -1 || distance < closestDistance) { | |
1014 | closestDistance = distance; | |
1015 | closestIdx = i; | |
d58ae307 DV |
1016 | } |
1017 | } | |
d58ae307 | 1018 | |
ee672584 RK |
1019 | // Allow any click within two pixels of the dot. |
1020 | var radius = g.attr_('highlightCircleSize') + 2; | |
1021 | if (closestDistance <= 5 * 5) { | |
1022 | g.attr_('pointClickCallback')(event, g.selPoints_[closestIdx]); | |
d58ae307 | 1023 | } |
6a1aa64f | 1024 | } |
ee672584 | 1025 | } |
e3489f4f | 1026 | |
ee672584 RK |
1027 | if (regionWidth >= 10 && context.dragDirection == Dygraph.HORIZONTAL) { |
1028 | g.doZoomX_(Math.min(context.dragStartX, context.dragEndX), | |
1029 | Math.max(context.dragStartX, context.dragEndX)); | |
1030 | } else if (regionHeight >= 10 && context.dragDirection == Dygraph.VERTICAL) { | |
1031 | g.doZoomY_(Math.min(context.dragStartY, context.dragEndY), | |
1032 | Math.max(context.dragStartY, context.dragEndY)); | |
1033 | } else { | |
1034 | g.canvas_.getContext("2d").clearRect(0, 0, | |
1035 | g.canvas_.width, | |
1036 | g.canvas_.height); | |
1037 | } | |
1038 | context.dragStartX = null; | |
1039 | context.dragStartY = null; | |
1040 | } | |
79b3ee42 | 1041 | |
0a52ab7a RK |
1042 | Dygraph.defaultInteractionModel = { |
1043 | // Track the beginning of drag events | |
4f0c5aa0 DV |
1044 | mousedown: function(event, g, context) { |
1045 | context.initializeMouseDown(event, g, context); | |
0a52ab7a | 1046 | |
4f0c5aa0 DV |
1047 | if (event.altKey || event.shiftKey) { |
1048 | Dygraph.startPan(event, g, context); | |
bce01b0f | 1049 | } else { |
4f0c5aa0 | 1050 | Dygraph.startZoom(event, g, context); |
bce01b0f | 1051 | } |
4f0c5aa0 | 1052 | }, |
6a1aa64f | 1053 | |
0a52ab7a | 1054 | // Draw zoom rectangles when the mouse is down and the user moves around |
4f0c5aa0 DV |
1055 | mousemove: function(event, g, context) { |
1056 | if (context.isZooming) { | |
1057 | Dygraph.moveZoom(event, g, context); | |
1058 | } else if (context.isPanning) { | |
1059 | Dygraph.movePan(event, g, context); | |
6a1aa64f | 1060 | } |
4f0c5aa0 | 1061 | }, |
bce01b0f | 1062 | |
4f0c5aa0 DV |
1063 | mouseup: function(event, g, context) { |
1064 | if (context.isZooming) { | |
1065 | Dygraph.endZoom(event, g, context); | |
1066 | } else if (context.isPanning) { | |
1067 | Dygraph.endPan(event, g, context); | |
bce01b0f | 1068 | } |
4f0c5aa0 | 1069 | }, |
6a1aa64f DV |
1070 | |
1071 | // Temporarily cancel the dragging event when the mouse leaves the graph | |
4f0c5aa0 DV |
1072 | mouseout: function(event, g, context) { |
1073 | if (context.isZooming) { | |
1074 | context.dragEndX = null; | |
1075 | context.dragEndY = null; | |
6a1aa64f | 1076 | } |
4f0c5aa0 | 1077 | }, |
6a1aa64f | 1078 | |
0a52ab7a | 1079 | // Disable zooming out if panning. |
4f0c5aa0 DV |
1080 | dblclick: function(event, g, context) { |
1081 | if (event.altKey || event.shiftKey) { | |
1082 | return; | |
0a52ab7a | 1083 | } |
4f0c5aa0 DV |
1084 | // TODO(konigsberg): replace g.doUnzoom()_ with something that is |
1085 | // friendlier to public use. | |
1086 | g.doUnzoom_(); | |
1087 | } | |
0a52ab7a | 1088 | }; |
1e1bf7df | 1089 | |
0a52ab7a | 1090 | Dygraph.DEFAULT_ATTRS.interactionModel = Dygraph.defaultInteractionModel; |
6a1aa64f | 1091 | |
ee672584 RK |
1092 | /** |
1093 | * Set up all the mouse handlers needed to capture dragging behavior for zoom | |
1094 | * events. | |
1095 | * @private | |
1096 | */ | |
1097 | Dygraph.prototype.createDragInterface_ = function() { | |
1098 | var context = { | |
1099 | // Tracks whether the mouse is down right now | |
4f0c5aa0 DV |
1100 | isZooming: false, |
1101 | isPanning: false, // is this drag part of a pan? | |
1102 | is2DPan: false, // if so, is that pan 1- or 2-dimensional? | |
1103 | dragStartX: null, | |
1104 | dragStartY: null, | |
1105 | dragEndX: null, | |
1106 | dragEndY: null, | |
1107 | dragDirection: null, | |
1108 | prevEndX: null, | |
1109 | prevEndY: null, | |
1110 | prevDragDirection: null, | |
ee672584 RK |
1111 | |
1112 | // TODO(danvk): update this comment | |
1113 | // draggingDate and draggingValue represent the [date,value] point on the | |
1114 | // graph at which the mouse was pressed. As the mouse moves while panning, | |
1115 | // the viewport must pan so that the mouse position points to | |
1116 | // [draggingDate, draggingValue] | |
4f0c5aa0 | 1117 | draggingDate: null, |
ee672584 RK |
1118 | |
1119 | // TODO(danvk): update this comment | |
1120 | // The range in second/value units that the viewport encompasses during a | |
1121 | // panning operation. | |
4f0c5aa0 | 1122 | dateRange: null, |
ee672584 RK |
1123 | |
1124 | // Utility function to convert page-wide coordinates to canvas coords | |
4f0c5aa0 DV |
1125 | px: 0, |
1126 | py: 0, | |
ee672584 | 1127 | |
4f0c5aa0 | 1128 | initializeMouseDown: function(event, g, context) { |
885c13e4 | 1129 | // prevents mouse drags from selecting page text. |
ee672584 RK |
1130 | if (event.preventDefault) { |
1131 | event.preventDefault(); // Firefox, Chrome, etc. | |
6a1aa64f | 1132 | } else { |
ee672584 | 1133 | event.returnValue = false; // IE |
4f0c5aa0 | 1134 | event.cancelBubble = true; |
6a1aa64f DV |
1135 | } |
1136 | ||
ee672584 RK |
1137 | context.px = Dygraph.findPosX(g.canvas_); |
1138 | context.py = Dygraph.findPosY(g.canvas_); | |
1139 | context.dragStartX = g.dragGetX_(event, context); | |
1140 | context.dragStartY = g.dragGetY_(event, context); | |
6a1aa64f | 1141 | } |
ee672584 | 1142 | }; |
bce01b0f | 1143 | |
885c13e4 RK |
1144 | var interactionModel = this.attr_("interactionModel"); |
1145 | ||
2b188b3d RK |
1146 | // Self is the graph. |
1147 | var self = this; | |
1148 | ||
1149 | // Function that binds the graph and context to the handler. | |
1150 | var bindHandler = function(handler) { | |
ee672584 | 1151 | return function(event) { |
2b188b3d | 1152 | handler(event, self, context); |
ee672584 RK |
1153 | }; |
1154 | }; | |
1155 | ||
885c13e4 RK |
1156 | for (var eventName in interactionModel) { |
1157 | if (!interactionModel.hasOwnProperty(eventName)) continue; | |
ee672584 | 1158 | Dygraph.addEvent(this.mouseEventElement_, eventName, |
2b188b3d | 1159 | bindHandler(interactionModel[eventName])); |
ee672584 | 1160 | } |
6a1aa64f | 1161 | |
6a1aa64f DV |
1162 | // If the user releases the mouse button during a drag, but not over the |
1163 | // canvas, then it doesn't count as a zooming action. | |
76171648 | 1164 | Dygraph.addEvent(document, 'mouseup', function(event) { |
ee672584 RK |
1165 | if (context.isZooming || context.isPanning) { |
1166 | context.isZooming = false; | |
1167 | context.dragStartX = null; | |
1168 | context.dragStartY = null; | |
6a1aa64f | 1169 | } |
8b83c6cc | 1170 | |
ee672584 RK |
1171 | if (context.isPanning) { |
1172 | context.isPanning = false; | |
1173 | context.draggingDate = null; | |
1174 | context.dateRange = null; | |
d58ae307 | 1175 | for (var i = 0; i < self.axes_.length; i++) { |
d63e6799 DV |
1176 | delete self.axes_[i].draggingValue; |
1177 | delete self.axes_[i].dragValueRange; | |
d58ae307 | 1178 | } |
bce01b0f | 1179 | } |
6a1aa64f DV |
1180 | }); |
1181 | }; | |
1182 | ||
1183 | /** | |
1184 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
1185 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
1186 | * avoid extra redrawing, but it's tricky to avoid interactions with the status | |
1187 | * dots. | |
8b83c6cc | 1188 | * |
39b0e098 RK |
1189 | * @param {Number} direction the direction of the zoom rectangle. Acceptable |
1190 | * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL. | |
6a1aa64f DV |
1191 | * @param {Number} startX The X position where the drag started, in canvas |
1192 | * coordinates. | |
1193 | * @param {Number} endX The current X position of the drag, in canvas coords. | |
8b83c6cc RK |
1194 | * @param {Number} startY The Y position where the drag started, in canvas |
1195 | * coordinates. | |
1196 | * @param {Number} endY The current Y position of the drag, in canvas coords. | |
39b0e098 | 1197 | * @param {Number} prevDirection the value of direction on the previous call to |
8b83c6cc | 1198 | * this function. Used to avoid excess redrawing |
6a1aa64f DV |
1199 | * @param {Number} prevEndX The value of endX on the previous call to this |
1200 | * function. Used to avoid excess redrawing | |
8b83c6cc RK |
1201 | * @param {Number} prevEndY The value of endY on the previous call to this |
1202 | * function. Used to avoid excess redrawing | |
6a1aa64f DV |
1203 | * @private |
1204 | */ | |
8b83c6cc RK |
1205 | Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY, endY, |
1206 | prevDirection, prevEndX, prevEndY) { | |
6a1aa64f DV |
1207 | var ctx = this.canvas_.getContext("2d"); |
1208 | ||
1209 | // Clean up from the previous rect if necessary | |
39b0e098 | 1210 | if (prevDirection == Dygraph.HORIZONTAL) { |
6a1aa64f DV |
1211 | ctx.clearRect(Math.min(startX, prevEndX), 0, |
1212 | Math.abs(startX - prevEndX), this.height_); | |
39b0e098 | 1213 | } else if (prevDirection == Dygraph.VERTICAL){ |
8b83c6cc RK |
1214 | ctx.clearRect(0, Math.min(startY, prevEndY), |
1215 | this.width_, Math.abs(startY - prevEndY)); | |
6a1aa64f DV |
1216 | } |
1217 | ||
1218 | // Draw a light-grey rectangle to show the new viewing area | |
39b0e098 | 1219 | if (direction == Dygraph.HORIZONTAL) { |
8b83c6cc RK |
1220 | if (endX && startX) { |
1221 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
1222 | ctx.fillRect(Math.min(startX, endX), 0, | |
1223 | Math.abs(endX - startX), this.height_); | |
1224 | } | |
1225 | } | |
39b0e098 | 1226 | if (direction == Dygraph.VERTICAL) { |
8b83c6cc RK |
1227 | if (endY && startY) { |
1228 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
1229 | ctx.fillRect(0, Math.min(startY, endY), | |
1230 | this.width_, Math.abs(endY - startY)); | |
1231 | } | |
6a1aa64f DV |
1232 | } |
1233 | }; | |
1234 | ||
1235 | /** | |
8b83c6cc RK |
1236 | * Zoom to something containing [lowX, highX]. These are pixel coordinates in |
1237 | * the canvas. The exact zoom window may be slightly larger if there are no data | |
1238 | * points near lowX or highX. Don't confuse this function with doZoomXDates, | |
1239 | * which accepts dates that match the raw data. This function redraws the graph. | |
d58ae307 | 1240 | * |
6a1aa64f DV |
1241 | * @param {Number} lowX The leftmost pixel value that should be visible. |
1242 | * @param {Number} highX The rightmost pixel value that should be visible. | |
1243 | * @private | |
1244 | */ | |
8b83c6cc | 1245 | Dygraph.prototype.doZoomX_ = function(lowX, highX) { |
6a1aa64f | 1246 | // Find the earliest and latest dates contained in this canvasx range. |
8b83c6cc | 1247 | // Convert the call to date ranges of the raw data. |
56623f3b DV |
1248 | var r = this.toDataCoords(lowX, null); |
1249 | var minDate = r[0]; | |
1250 | r = this.toDataCoords(highX, null); | |
1251 | var maxDate = r[0]; | |
8b83c6cc RK |
1252 | this.doZoomXDates_(minDate, maxDate); |
1253 | }; | |
6a1aa64f | 1254 | |
8b83c6cc RK |
1255 | /** |
1256 | * Zoom to something containing [minDate, maxDate] values. Don't confuse this | |
1257 | * method with doZoomX which accepts pixel coordinates. This function redraws | |
1258 | * the graph. | |
d58ae307 | 1259 | * |
8b83c6cc RK |
1260 | * @param {Number} minDate The minimum date that should be visible. |
1261 | * @param {Number} maxDate The maximum date that should be visible. | |
1262 | * @private | |
1263 | */ | |
1264 | Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) { | |
6a1aa64f | 1265 | this.dateWindow_ = [minDate, maxDate]; |
26ca7938 | 1266 | this.drawGraph_(); |
285a6bda | 1267 | if (this.attr_("zoomCallback")) { |
ac139d19 | 1268 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); |
8b83c6cc RK |
1269 | } |
1270 | }; | |
1271 | ||
1272 | /** | |
1273 | * Zoom to something containing [lowY, highY]. These are pixel coordinates in | |
d58ae307 DV |
1274 | * the canvas. This function redraws the graph. |
1275 | * | |
8b83c6cc RK |
1276 | * @param {Number} lowY The topmost pixel value that should be visible. |
1277 | * @param {Number} highY The lowest pixel value that should be visible. | |
1278 | * @private | |
1279 | */ | |
1280 | Dygraph.prototype.doZoomY_ = function(lowY, highY) { | |
d58ae307 DV |
1281 | // Find the highest and lowest values in pixel range for each axis. |
1282 | // Note that lowY (in pixels) corresponds to the max Value (in data coords). | |
1283 | // This is because pixels increase as you go down on the screen, whereas data | |
1284 | // coordinates increase as you go up the screen. | |
1285 | var valueRanges = []; | |
1286 | for (var i = 0; i < this.axes_.length; i++) { | |
1287 | var hi = this.toDataCoords(null, lowY, i); | |
1288 | var low = this.toDataCoords(null, highY, i); | |
1289 | this.axes_[i].valueWindow = [low[1], hi[1]]; | |
1290 | valueRanges.push([low[1], hi[1]]); | |
1291 | } | |
8b83c6cc | 1292 | |
66c380c4 | 1293 | this.drawGraph_(); |
8b83c6cc | 1294 | if (this.attr_("zoomCallback")) { |
d58ae307 DV |
1295 | var xRange = this.xAxisRange(); |
1296 | this.attr_("zoomCallback")(xRange[0], xRange[1], this.yAxisRanges()); | |
8b83c6cc RK |
1297 | } |
1298 | }; | |
1299 | ||
1300 | /** | |
1301 | * Reset the zoom to the original view coordinates. This is the same as | |
1302 | * double-clicking on the graph. | |
d58ae307 | 1303 | * |
8b83c6cc RK |
1304 | * @private |
1305 | */ | |
1306 | Dygraph.prototype.doUnzoom_ = function() { | |
d58ae307 | 1307 | var dirty = false; |
8b83c6cc | 1308 | if (this.dateWindow_ != null) { |
d58ae307 | 1309 | dirty = true; |
8b83c6cc RK |
1310 | this.dateWindow_ = null; |
1311 | } | |
d58ae307 DV |
1312 | |
1313 | for (var i = 0; i < this.axes_.length; i++) { | |
1314 | if (this.axes_[i].valueWindow != null) { | |
1315 | dirty = true; | |
1316 | delete this.axes_[i].valueWindow; | |
1317 | } | |
8b83c6cc RK |
1318 | } |
1319 | ||
1320 | if (dirty) { | |
437c0979 RK |
1321 | // Putting the drawing operation before the callback because it resets |
1322 | // yAxisRange. | |
66c380c4 | 1323 | this.drawGraph_(); |
8b83c6cc RK |
1324 | if (this.attr_("zoomCallback")) { |
1325 | var minDate = this.rawData_[0][0]; | |
1326 | var maxDate = this.rawData_[this.rawData_.length - 1][0]; | |
d58ae307 | 1327 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); |
8b83c6cc | 1328 | } |
67e650dc | 1329 | } |
6a1aa64f DV |
1330 | }; |
1331 | ||
1332 | /** | |
1333 | * When the mouse moves in the canvas, display information about a nearby data | |
1334 | * point and draw dots over those points in the data series. This function | |
1335 | * takes care of cleanup of previously-drawn dots. | |
1336 | * @param {Object} event The mousemove event from the browser. | |
1337 | * @private | |
1338 | */ | |
285a6bda | 1339 | Dygraph.prototype.mouseMove_ = function(event) { |
eb7bf005 | 1340 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_); |
6a1aa64f DV |
1341 | var points = this.layout_.points; |
1342 | ||
1343 | var lastx = -1; | |
1344 | var lasty = -1; | |
1345 | ||
1346 | // Loop through all the points and find the date nearest to our current | |
1347 | // location. | |
1348 | var minDist = 1e+100; | |
1349 | var idx = -1; | |
1350 | for (var i = 0; i < points.length; i++) { | |
8a7cc60e RK |
1351 | var point = points[i]; |
1352 | if (point == null) continue; | |
ee672584 | 1353 | var dist = Math.abs(point.canvasx - canvasx); |
f032c51d | 1354 | if (dist > minDist) continue; |
6a1aa64f DV |
1355 | minDist = dist; |
1356 | idx = i; | |
1357 | } | |
1358 | if (idx >= 0) lastx = points[idx].xval; | |
1359 | // Check that you can really highlight the last day's data | |
8a7cc60e RK |
1360 | var last = points[points.length-1]; |
1361 | if (last != null && canvasx > last.canvasx) | |
6a1aa64f DV |
1362 | lastx = points[points.length-1].xval; |
1363 | ||
1364 | // Extract the points we've selected | |
b258a3da | 1365 | this.selPoints_ = []; |
50360fd0 | 1366 | var l = points.length; |
416b05ad NK |
1367 | if (!this.attr_("stackedGraph")) { |
1368 | for (var i = 0; i < l; i++) { | |
1369 | if (points[i].xval == lastx) { | |
1370 | this.selPoints_.push(points[i]); | |
1371 | } | |
1372 | } | |
1373 | } else { | |
354e15ab DE |
1374 | // Need to 'unstack' points starting from the bottom |
1375 | var cumulative_sum = 0; | |
416b05ad NK |
1376 | for (var i = l - 1; i >= 0; i--) { |
1377 | if (points[i].xval == lastx) { | |
354e15ab | 1378 | var p = {}; // Clone the point since we modify it |
d4139cd8 NK |
1379 | for (var k in points[i]) { |
1380 | p[k] = points[i][k]; | |
50360fd0 NK |
1381 | } |
1382 | p.yval -= cumulative_sum; | |
1383 | cumulative_sum += p.yval; | |
d4139cd8 | 1384 | this.selPoints_.push(p); |
12e4c741 | 1385 | } |
6a1aa64f | 1386 | } |
354e15ab | 1387 | this.selPoints_.reverse(); |
6a1aa64f DV |
1388 | } |
1389 | ||
b258a3da | 1390 | if (this.attr_("highlightCallback")) { |
a4c6a67c | 1391 | var px = this.lastx_; |
dd082dda | 1392 | if (px !== null && lastx != px) { |
344ba8c0 | 1393 | // only fire if the selected point has changed. |
2ddb1197 | 1394 | this.attr_("highlightCallback")(event, lastx, this.selPoints_, this.idxToRow_(idx)); |
43af96e7 | 1395 | } |
12e4c741 | 1396 | } |
43af96e7 | 1397 | |
239c712d NAG |
1398 | // Save last x position for callbacks. |
1399 | this.lastx_ = lastx; | |
50360fd0 | 1400 | |
239c712d NAG |
1401 | this.updateSelection_(); |
1402 | }; | |
b258a3da | 1403 | |
239c712d | 1404 | /** |
1903f1e4 | 1405 | * Transforms layout_.points index into data row number. |
2ddb1197 | 1406 | * @param int layout_.points index |
1903f1e4 | 1407 | * @return int row number, or -1 if none could be found. |
2ddb1197 SC |
1408 | * @private |
1409 | */ | |
1410 | Dygraph.prototype.idxToRow_ = function(idx) { | |
1903f1e4 | 1411 | if (idx < 0) return -1; |
2ddb1197 | 1412 | |
1903f1e4 DV |
1413 | for (var i in this.layout_.datasets) { |
1414 | if (idx < this.layout_.datasets[i].length) { | |
1415 | return this.boundaryIds_[0][0]+idx; | |
1416 | } | |
1417 | idx -= this.layout_.datasets[i].length; | |
1418 | } | |
1419 | return -1; | |
1420 | }; | |
2ddb1197 SC |
1421 | |
1422 | /** | |
239c712d NAG |
1423 | * Draw dots over the selectied points in the data series. This function |
1424 | * takes care of cleanup of previously-drawn dots. | |
1425 | * @private | |
1426 | */ | |
1427 | Dygraph.prototype.updateSelection_ = function() { | |
6a1aa64f | 1428 | // Clear the previously drawn vertical, if there is one |
6a1aa64f DV |
1429 | var ctx = this.canvas_.getContext("2d"); |
1430 | if (this.previousVerticalX_ >= 0) { | |
46dde5f9 DV |
1431 | // Determine the maximum highlight circle size. |
1432 | var maxCircleSize = 0; | |
227b93cc DV |
1433 | var labels = this.attr_('labels'); |
1434 | for (var i = 1; i < labels.length; i++) { | |
1435 | var r = this.attr_('highlightCircleSize', labels[i]); | |
46dde5f9 DV |
1436 | if (r > maxCircleSize) maxCircleSize = r; |
1437 | } | |
6a1aa64f | 1438 | var px = this.previousVerticalX_; |
46dde5f9 DV |
1439 | ctx.clearRect(px - maxCircleSize - 1, 0, |
1440 | 2 * maxCircleSize + 2, this.height_); | |
6a1aa64f DV |
1441 | } |
1442 | ||
584ceeaa DV |
1443 | var isOK = function(x) { return x && !isNaN(x); }; |
1444 | ||
d160cc3b | 1445 | if (this.selPoints_.length > 0) { |
b258a3da | 1446 | var canvasx = this.selPoints_[0].canvasx; |
6a1aa64f DV |
1447 | |
1448 | // Set the status message to indicate the selected point(s) | |
6be8e54c JB |
1449 | var replace = this.attr_('xValueFormatter')( |
1450 | this.lastx_, this.numXDigits_ + this.numExtraDigits_) + ":"; | |
50360fd0 | 1451 | var fmtFunc = this.attr_('yValueFormatter'); |
6a1aa64f | 1452 | var clen = this.colors_.length; |
d160cc3b NK |
1453 | |
1454 | if (this.attr_('showLabelsOnHighlight')) { | |
1455 | // Set the status message to indicate the selected point(s) | |
d160cc3b | 1456 | for (var i = 0; i < this.selPoints_.length; i++) { |
129569a5 | 1457 | if (!this.attr_("labelsShowZeroValues") && this.selPoints_[i].yval == 0) continue; |
d160cc3b NK |
1458 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
1459 | if (this.attr_("labelsSeparateLines")) { | |
1460 | replace += "<br/>"; | |
1461 | } | |
1462 | var point = this.selPoints_[i]; | |
8fb6dc24 | 1463 | var c = new RGBColor(this.plotter_.colors[point.name]); |
6be8e54c | 1464 | var yval = fmtFunc(point.yval, this.numYDigits_ + this.numExtraDigits_); |
d160cc3b NK |
1465 | replace += " <b><font color='" + c.toHex() + "'>" |
1466 | + point.name + "</font></b>:" | |
1467 | + yval; | |
6a1aa64f | 1468 | } |
50360fd0 | 1469 | |
d160cc3b | 1470 | this.attr_("labelsDiv").innerHTML = replace; |
6a1aa64f | 1471 | } |
6a1aa64f | 1472 | |
6a1aa64f | 1473 | // Draw colored circles over the center of each selected point |
43af96e7 | 1474 | ctx.save(); |
b258a3da | 1475 | for (var i = 0; i < this.selPoints_.length; i++) { |
f032c51d | 1476 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
227b93cc DV |
1477 | var circleSize = |
1478 | this.attr_('highlightCircleSize', this.selPoints_[i].name); | |
6a1aa64f | 1479 | ctx.beginPath(); |
563c70ca | 1480 | ctx.fillStyle = this.plotter_.colors[this.selPoints_[i].name]; |
f032c51d | 1481 | ctx.arc(canvasx, this.selPoints_[i].canvasy, circleSize, |
7bf6a9fe | 1482 | 0, 2 * Math.PI, false); |
6a1aa64f DV |
1483 | ctx.fill(); |
1484 | } | |
1485 | ctx.restore(); | |
1486 | ||
1487 | this.previousVerticalX_ = canvasx; | |
1488 | } | |
1489 | }; | |
1490 | ||
1491 | /** | |
239c712d NAG |
1492 | * Set manually set selected dots, and display information about them |
1493 | * @param int row number that should by highlighted | |
1494 | * false value clears the selection | |
1495 | * @public | |
1496 | */ | |
1497 | Dygraph.prototype.setSelection = function(row) { | |
1498 | // Extract the points we've selected | |
1499 | this.selPoints_ = []; | |
1500 | var pos = 0; | |
50360fd0 | 1501 | |
239c712d | 1502 | if (row !== false) { |
16269f6e NAG |
1503 | row = row-this.boundaryIds_[0][0]; |
1504 | } | |
50360fd0 | 1505 | |
16269f6e | 1506 | if (row !== false && row >= 0) { |
239c712d | 1507 | for (var i in this.layout_.datasets) { |
16269f6e | 1508 | if (row < this.layout_.datasets[i].length) { |
38f33a44 | 1509 | var point = this.layout_.points[pos+row]; |
1510 | ||
1511 | if (this.attr_("stackedGraph")) { | |
8c03ba63 | 1512 | point = this.layout_.unstackPointAtIndex(pos+row); |
38f33a44 | 1513 | } |
1514 | ||
1515 | this.selPoints_.push(point); | |
16269f6e | 1516 | } |
239c712d NAG |
1517 | pos += this.layout_.datasets[i].length; |
1518 | } | |
16269f6e | 1519 | } |
50360fd0 | 1520 | |
16269f6e | 1521 | if (this.selPoints_.length) { |
239c712d NAG |
1522 | this.lastx_ = this.selPoints_[0].xval; |
1523 | this.updateSelection_(); | |
1524 | } else { | |
1525 | this.lastx_ = -1; | |
1526 | this.clearSelection(); | |
1527 | } | |
1528 | ||
1529 | }; | |
1530 | ||
1531 | /** | |
6a1aa64f DV |
1532 | * The mouse has left the canvas. Clear out whatever artifacts remain |
1533 | * @param {Object} event the mouseout event from the browser. | |
1534 | * @private | |
1535 | */ | |
285a6bda | 1536 | Dygraph.prototype.mouseOut_ = function(event) { |
a4c6a67c AV |
1537 | if (this.attr_("unhighlightCallback")) { |
1538 | this.attr_("unhighlightCallback")(event); | |
1539 | } | |
1540 | ||
43af96e7 | 1541 | if (this.attr_("hideOverlayOnMouseOut")) { |
239c712d | 1542 | this.clearSelection(); |
43af96e7 | 1543 | } |
6a1aa64f DV |
1544 | }; |
1545 | ||
239c712d NAG |
1546 | /** |
1547 | * Remove all selection from the canvas | |
1548 | * @public | |
1549 | */ | |
1550 | Dygraph.prototype.clearSelection = function() { | |
1551 | // Get rid of the overlay data | |
1552 | var ctx = this.canvas_.getContext("2d"); | |
1553 | ctx.clearRect(0, 0, this.width_, this.height_); | |
1554 | this.attr_("labelsDiv").innerHTML = ""; | |
1555 | this.selPoints_ = []; | |
1556 | this.lastx_ = -1; | |
1557 | } | |
1558 | ||
103b7292 NAG |
1559 | /** |
1560 | * Returns the number of the currently selected row | |
1561 | * @return int row number, of -1 if nothing is selected | |
1562 | * @public | |
1563 | */ | |
1564 | Dygraph.prototype.getSelection = function() { | |
1565 | if (!this.selPoints_ || this.selPoints_.length < 1) { | |
1566 | return -1; | |
1567 | } | |
50360fd0 | 1568 | |
103b7292 NAG |
1569 | for (var row=0; row<this.layout_.points.length; row++ ) { |
1570 | if (this.layout_.points[row].x == this.selPoints_[0].x) { | |
16269f6e | 1571 | return row + this.boundaryIds_[0][0]; |
103b7292 NAG |
1572 | } |
1573 | } | |
1574 | return -1; | |
1575 | } | |
1576 | ||
285a6bda | 1577 | Dygraph.zeropad = function(x) { |
32988383 DV |
1578 | if (x < 10) return "0" + x; else return "" + x; |
1579 | } | |
1580 | ||
6a1aa64f | 1581 | /** |
6b8e33dd DV |
1582 | * Return a string version of the hours, minutes and seconds portion of a date. |
1583 | * @param {Number} date The JavaScript date (ms since epoch) | |
1584 | * @return {String} A time of the form "HH:MM:SS" | |
1585 | * @private | |
1586 | */ | |
bf640e56 | 1587 | Dygraph.hmsString_ = function(date) { |
285a6bda | 1588 | var zeropad = Dygraph.zeropad; |
6b8e33dd DV |
1589 | var d = new Date(date); |
1590 | if (d.getSeconds()) { | |
1591 | return zeropad(d.getHours()) + ":" + | |
1592 | zeropad(d.getMinutes()) + ":" + | |
1593 | zeropad(d.getSeconds()); | |
6b8e33dd | 1594 | } else { |
054531ca | 1595 | return zeropad(d.getHours()) + ":" + zeropad(d.getMinutes()); |
6b8e33dd DV |
1596 | } |
1597 | } | |
1598 | ||
1599 | /** | |
bf640e56 AV |
1600 | * Convert a JS date to a string appropriate to display on an axis that |
1601 | * is displaying values at the stated granularity. | |
1602 | * @param {Date} date The date to format | |
1603 | * @param {Number} granularity One of the Dygraph granularity constants | |
1604 | * @return {String} The formatted date | |
1605 | * @private | |
1606 | */ | |
1607 | Dygraph.dateAxisFormatter = function(date, granularity) { | |
5f70132f DV |
1608 | if (granularity >= Dygraph.DECADAL) { |
1609 | return date.strftime('%Y'); | |
1610 | } else if (granularity >= Dygraph.MONTHLY) { | |
bf640e56 AV |
1611 | return date.strftime('%b %y'); |
1612 | } else { | |
31eddad3 | 1613 | var frac = date.getHours() * 3600 + date.getMinutes() * 60 + date.getSeconds() + date.getMilliseconds(); |
bf640e56 AV |
1614 | if (frac == 0 || granularity >= Dygraph.DAILY) { |
1615 | return new Date(date.getTime() + 3600*1000).strftime('%d%b'); | |
1616 | } else { | |
1617 | return Dygraph.hmsString_(date.getTime()); | |
1618 | } | |
1619 | } | |
1620 | } | |
1621 | ||
1622 | /** | |
6a1aa64f DV |
1623 | * Convert a JS date (millis since epoch) to YYYY/MM/DD |
1624 | * @param {Number} date The JavaScript date (ms since epoch) | |
1625 | * @return {String} A date of the form "YYYY/MM/DD" | |
1626 | * @private | |
1627 | */ | |
6be8e54c | 1628 | Dygraph.dateString_ = function(date) { |
285a6bda | 1629 | var zeropad = Dygraph.zeropad; |
6a1aa64f DV |
1630 | var d = new Date(date); |
1631 | ||
1632 | // Get the year: | |
1633 | var year = "" + d.getFullYear(); | |
1634 | // Get a 0 padded month string | |
6b8e33dd | 1635 | var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh |
6a1aa64f | 1636 | // Get a 0 padded day string |
6b8e33dd | 1637 | var day = zeropad(d.getDate()); |
6a1aa64f | 1638 | |
6b8e33dd DV |
1639 | var ret = ""; |
1640 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); | |
bf640e56 | 1641 | if (frac) ret = " " + Dygraph.hmsString_(date); |
6b8e33dd DV |
1642 | |
1643 | return year + "/" + month + "/" + day + ret; | |
6a1aa64f DV |
1644 | }; |
1645 | ||
1646 | /** | |
33aaaca3 DV |
1647 | * Round a number to the specified number of digits past the decimal point. |
1648 | * @param {Number} num The number to round | |
1649 | * @param {Number} places The number of decimals to which to round | |
1650 | * @return {Number} The rounded number | |
1651 | * @private | |
1652 | */ | |
1653 | Dygraph.round_ = function(num, places) { | |
1654 | var shift = Math.pow(10, places); | |
1655 | return Math.round(num * shift)/shift; | |
1656 | }; | |
1657 | ||
1658 | /** | |
6a1aa64f DV |
1659 | * Fires when there's data available to be graphed. |
1660 | * @param {String} data Raw CSV data to be plotted | |
1661 | * @private | |
1662 | */ | |
285a6bda | 1663 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f | 1664 | this.rawData_ = this.parseCSV_(data); |
26ca7938 | 1665 | this.predraw_(); |
6a1aa64f DV |
1666 | }; |
1667 | ||
285a6bda | 1668 | Dygraph.prototype.months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", |
8846615a | 1669 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]; |
285a6bda | 1670 | Dygraph.prototype.quarters = ["Jan", "Apr", "Jul", "Oct"]; |
6a1aa64f DV |
1671 | |
1672 | /** | |
1673 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
1674 | * @private | |
1675 | */ | |
285a6bda | 1676 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f | 1677 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
6be8e54c JB |
1678 | var opts = {xTicks: []}; |
1679 | var formatter = this.attr_('xTicker'); | |
6a1aa64f | 1680 | if (this.dateWindow_) { |
6be8e54c | 1681 | opts.xTicks = formatter(this.dateWindow_[0], this.dateWindow_[1], this); |
6a1aa64f | 1682 | } else { |
6be8e54c JB |
1683 | // numericTicks() returns multiple values. |
1684 | var ret = formatter(this.rawData_[0][0], | |
1685 | this.rawData_[this.rawData_.length - 1][0], this); | |
1686 | opts.xTicks = ret.ticks; | |
1687 | this.numXDigits_ = ret.numDigits; | |
3c1d225b | 1688 | } |
6be8e54c | 1689 | this.layout_.updateOptions(opts); |
32988383 DV |
1690 | }; |
1691 | ||
1692 | // Time granularity enumeration | |
285a6bda | 1693 | Dygraph.SECONDLY = 0; |
20a41c17 DV |
1694 | Dygraph.TWO_SECONDLY = 1; |
1695 | Dygraph.FIVE_SECONDLY = 2; | |
1696 | Dygraph.TEN_SECONDLY = 3; | |
1697 | Dygraph.THIRTY_SECONDLY = 4; | |
1698 | Dygraph.MINUTELY = 5; | |
1699 | Dygraph.TWO_MINUTELY = 6; | |
1700 | Dygraph.FIVE_MINUTELY = 7; | |
1701 | Dygraph.TEN_MINUTELY = 8; | |
1702 | Dygraph.THIRTY_MINUTELY = 9; | |
1703 | Dygraph.HOURLY = 10; | |
1704 | Dygraph.TWO_HOURLY = 11; | |
1705 | Dygraph.SIX_HOURLY = 12; | |
1706 | Dygraph.DAILY = 13; | |
1707 | Dygraph.WEEKLY = 14; | |
1708 | Dygraph.MONTHLY = 15; | |
1709 | Dygraph.QUARTERLY = 16; | |
1710 | Dygraph.BIANNUAL = 17; | |
1711 | Dygraph.ANNUAL = 18; | |
1712 | Dygraph.DECADAL = 19; | |
3db4c464 | 1713 | Dygraph.CENTENNIAL = 20; |
5f70132f | 1714 | Dygraph.NUM_GRANULARITIES = 21; |
285a6bda DV |
1715 | |
1716 | Dygraph.SHORT_SPACINGS = []; | |
1717 | Dygraph.SHORT_SPACINGS[Dygraph.SECONDLY] = 1000 * 1; | |
20a41c17 DV |
1718 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_SECONDLY] = 1000 * 2; |
1719 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_SECONDLY] = 1000 * 5; | |
285a6bda DV |
1720 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_SECONDLY] = 1000 * 10; |
1721 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_SECONDLY] = 1000 * 30; | |
1722 | Dygraph.SHORT_SPACINGS[Dygraph.MINUTELY] = 1000 * 60; | |
20a41c17 DV |
1723 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_MINUTELY] = 1000 * 60 * 2; |
1724 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_MINUTELY] = 1000 * 60 * 5; | |
285a6bda DV |
1725 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_MINUTELY] = 1000 * 60 * 10; |
1726 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_MINUTELY] = 1000 * 60 * 30; | |
1727 | Dygraph.SHORT_SPACINGS[Dygraph.HOURLY] = 1000 * 3600; | |
20a41c17 | 1728 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_HOURLY] = 1000 * 3600 * 2; |
805d5519 | 1729 | Dygraph.SHORT_SPACINGS[Dygraph.SIX_HOURLY] = 1000 * 3600 * 6; |
285a6bda DV |
1730 | Dygraph.SHORT_SPACINGS[Dygraph.DAILY] = 1000 * 86400; |
1731 | Dygraph.SHORT_SPACINGS[Dygraph.WEEKLY] = 1000 * 604800; | |
32988383 DV |
1732 | |
1733 | // NumXTicks() | |
1734 | // | |
1735 | // If we used this time granularity, how many ticks would there be? | |
1736 | // This is only an approximation, but it's generally good enough. | |
1737 | // | |
285a6bda DV |
1738 | Dygraph.prototype.NumXTicks = function(start_time, end_time, granularity) { |
1739 | if (granularity < Dygraph.MONTHLY) { | |
32988383 | 1740 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1741 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
32988383 DV |
1742 | return Math.floor(0.5 + 1.0 * (end_time - start_time) / spacing); |
1743 | } else { | |
1744 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1745 | var num_months = 12; | |
285a6bda DV |
1746 | if (granularity == Dygraph.QUARTERLY) num_months = 3; |
1747 | if (granularity == Dygraph.BIANNUAL) num_months = 2; | |
1748 | if (granularity == Dygraph.ANNUAL) num_months = 1; | |
1749 | if (granularity == Dygraph.DECADAL) { num_months = 1; year_mod = 10; } | |
3db4c464 | 1750 | if (granularity == Dygraph.CENTENNIAL) { num_months = 1; year_mod = 100; } |
32988383 DV |
1751 | |
1752 | var msInYear = 365.2524 * 24 * 3600 * 1000; | |
1753 | var num_years = 1.0 * (end_time - start_time) / msInYear; | |
1754 | return Math.floor(0.5 + 1.0 * num_years * num_months / year_mod); | |
1755 | } | |
1756 | }; | |
1757 | ||
1758 | // GetXAxis() | |
1759 | // | |
1760 | // Construct an x-axis of nicely-formatted times on meaningful boundaries | |
1761 | // (e.g. 'Jan 09' rather than 'Jan 22, 2009'). | |
1762 | // | |
1763 | // Returns an array containing {v: millis, label: label} dictionaries. | |
1764 | // | |
285a6bda | 1765 | Dygraph.prototype.GetXAxis = function(start_time, end_time, granularity) { |
bf640e56 | 1766 | var formatter = this.attr_("xAxisLabelFormatter"); |
32988383 | 1767 | var ticks = []; |
285a6bda | 1768 | if (granularity < Dygraph.MONTHLY) { |
32988383 | 1769 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1770 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
3d29302c | 1771 | var format = '%d%b'; // e.g. "1Jan" |
076c9622 DV |
1772 | |
1773 | // Find a time less than start_time which occurs on a "nice" time boundary | |
1774 | // for this granularity. | |
1775 | var g = spacing / 1000; | |
076c9622 DV |
1776 | var d = new Date(start_time); |
1777 | if (g <= 60) { // seconds | |
1778 | var x = d.getSeconds(); d.setSeconds(x - x % g); | |
1779 | } else { | |
1780 | d.setSeconds(0); | |
1781 | g /= 60; | |
1782 | if (g <= 60) { // minutes | |
1783 | var x = d.getMinutes(); d.setMinutes(x - x % g); | |
1784 | } else { | |
1785 | d.setMinutes(0); | |
1786 | g /= 60; | |
1787 | ||
1788 | if (g <= 24) { // days | |
1789 | var x = d.getHours(); d.setHours(x - x % g); | |
1790 | } else { | |
1791 | d.setHours(0); | |
1792 | g /= 24; | |
1793 | ||
1794 | if (g == 7) { // one week | |
20a41c17 | 1795 | d.setDate(d.getDate() - d.getDay()); |
076c9622 DV |
1796 | } |
1797 | } | |
1798 | } | |
328bb812 | 1799 | } |
076c9622 DV |
1800 | start_time = d.getTime(); |
1801 | ||
32988383 | 1802 | for (var t = start_time; t <= end_time; t += spacing) { |
bf640e56 | 1803 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1804 | } |
1805 | } else { | |
1806 | // Display a tick mark on the first of a set of months of each year. | |
1807 | // Years get a tick mark iff y % year_mod == 0. This is useful for | |
1808 | // displaying a tick mark once every 10 years, say, on long time scales. | |
1809 | var months; | |
1810 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1811 | ||
285a6bda | 1812 | if (granularity == Dygraph.MONTHLY) { |
32988383 | 1813 | months = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ]; |
285a6bda | 1814 | } else if (granularity == Dygraph.QUARTERLY) { |
32988383 | 1815 | months = [ 0, 3, 6, 9 ]; |
285a6bda | 1816 | } else if (granularity == Dygraph.BIANNUAL) { |
32988383 | 1817 | months = [ 0, 6 ]; |
285a6bda | 1818 | } else if (granularity == Dygraph.ANNUAL) { |
32988383 | 1819 | months = [ 0 ]; |
285a6bda | 1820 | } else if (granularity == Dygraph.DECADAL) { |
32988383 DV |
1821 | months = [ 0 ]; |
1822 | year_mod = 10; | |
3db4c464 | 1823 | } else if (granularity == Dygraph.CENTENNIAL) { |
5f70132f DV |
1824 | months = [ 0 ]; |
1825 | year_mod = 100; | |
1826 | } else { | |
1827 | this.warn("Span of dates is too long"); | |
32988383 DV |
1828 | } |
1829 | ||
1830 | var start_year = new Date(start_time).getFullYear(); | |
1831 | var end_year = new Date(end_time).getFullYear(); | |
285a6bda | 1832 | var zeropad = Dygraph.zeropad; |
32988383 DV |
1833 | for (var i = start_year; i <= end_year; i++) { |
1834 | if (i % year_mod != 0) continue; | |
1835 | for (var j = 0; j < months.length; j++) { | |
1836 | var date_str = i + "/" + zeropad(1 + months[j]) + "/01"; | |
1837 | var t = Date.parse(date_str); | |
1838 | if (t < start_time || t > end_time) continue; | |
bf640e56 | 1839 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1840 | } |
1841 | } | |
1842 | } | |
1843 | ||
1844 | return ticks; | |
1845 | }; | |
1846 | ||
6a1aa64f DV |
1847 | |
1848 | /** | |
1849 | * Add ticks to the x-axis based on a date range. | |
1850 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1851 | * @param {Number} endDate End of the date window (millis since epoch) | |
1852 | * @return {Array.<Object>} Array of {label, value} tuples. | |
1853 | * @public | |
1854 | */ | |
285a6bda | 1855 | Dygraph.dateTicker = function(startDate, endDate, self) { |
32988383 | 1856 | var chosen = -1; |
285a6bda DV |
1857 | for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) { |
1858 | var num_ticks = self.NumXTicks(startDate, endDate, i); | |
1859 | if (self.width_ / num_ticks >= self.attr_('pixelsPerXLabel')) { | |
32988383 DV |
1860 | chosen = i; |
1861 | break; | |
2769de62 | 1862 | } |
6a1aa64f DV |
1863 | } |
1864 | ||
32988383 | 1865 | if (chosen >= 0) { |
285a6bda | 1866 | return self.GetXAxis(startDate, endDate, chosen); |
6a1aa64f | 1867 | } else { |
32988383 | 1868 | // TODO(danvk): signal error. |
6a1aa64f | 1869 | } |
6a1aa64f DV |
1870 | }; |
1871 | ||
1872 | /** | |
3c1d225b JB |
1873 | * Determine the number of significant figures in a Number up to the specified |
1874 | * precision. Note that there is no way to determine if a trailing '0' is | |
1875 | * significant or not, so by convention we return 1 for all of the following | |
1876 | * inputs: 1, 1.0, 1.00, 1.000 etc. | |
1877 | * @param {Number} x The input value. | |
1878 | * @param {Number} opt_maxPrecision Optional maximum precision to consider. | |
1879 | * Default and maximum allowed value is 13. | |
1880 | * @return {Number} The number of significant figures which is >= 1. | |
1881 | */ | |
1882 | Dygraph.significantFigures = function(x, opt_maxPrecision) { | |
1883 | var precision = Math.max(opt_maxPrecision || 13, 13); | |
1884 | ||
fff1de86 | 1885 | // Convert the number to its exponential notation form and work backwards, |
3c1d225b JB |
1886 | // ignoring the 'e+xx' bit. This may seem like a hack, but doing a loop and |
1887 | // dividing by 10 leads to roundoff errors. By using toExponential(), we let | |
1888 | // the JavaScript interpreter handle the low level bits of the Number for us. | |
1889 | var s = x.toExponential(precision); | |
1890 | var ePos = s.lastIndexOf('e'); // -1 case handled by return below. | |
1891 | ||
1892 | for (var i = ePos - 1; i >= 0; i--) { | |
1893 | if (s[i] == '.') { | |
1894 | // Got to the decimal place. We'll call this 1 digit of precision because | |
1895 | // we can't know for sure how many trailing 0s are significant. | |
1896 | return 1; | |
1897 | } else if (s[i] != '0') { | |
1898 | // Found the first non-zero digit. Return the number of characters | |
1899 | // except for the '.'. | |
1900 | return i; // This is i - 1 + 1 (-1 is for '.', +1 is for 0 based index). | |
1901 | } | |
1902 | } | |
1903 | ||
1904 | // Occurs if toExponential() doesn't return a string containing 'e', which | |
1905 | // should never happen. | |
1906 | return 1; | |
1907 | }; | |
1908 | ||
1909 | /** | |
6a1aa64f DV |
1910 | * Add ticks when the x axis has numbers on it (instead of dates) |
1911 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1912 | * @param {Number} endDate End of the date window (millis since epoch) | |
84fc6aa7 | 1913 | * @param self |
f30cf740 | 1914 | * @param {function} attribute accessor function. |
6a1aa64f DV |
1915 | * @return {Array.<Object>} Array of {label, value} tuples. |
1916 | * @public | |
1917 | */ | |
0d64e596 | 1918 | Dygraph.numericTicks = function(minV, maxV, self, axis_props, vals) { |
70c80071 DV |
1919 | var attr = function(k) { |
1920 | if (axis_props && axis_props.hasOwnProperty(k)) return axis_props[k]; | |
1921 | return self.attr_(k); | |
1922 | }; | |
f09fc545 | 1923 | |
0d64e596 DV |
1924 | var ticks = []; |
1925 | if (vals) { | |
1926 | for (var i = 0; i < vals.length; i++) { | |
fff1de86 | 1927 | ticks[i].push({v: vals[i]}); |
0d64e596 | 1928 | } |
f09e46d4 | 1929 | } else { |
0d64e596 DV |
1930 | // Basic idea: |
1931 | // Try labels every 1, 2, 5, 10, 20, 50, 100, etc. | |
1932 | // Calculate the resulting tick spacing (i.e. this.height_ / nTicks). | |
1933 | // The first spacing greater than pixelsPerYLabel is what we use. | |
1934 | // TODO(danvk): version that works on a log scale. | |
f09fc545 | 1935 | if (attr("labelsKMG2")) { |
0d64e596 | 1936 | var mults = [1, 2, 4, 8]; |
f09e46d4 | 1937 | } else { |
0d64e596 | 1938 | var mults = [1, 2, 5]; |
f09e46d4 | 1939 | } |
0d64e596 DV |
1940 | var scale, low_val, high_val, nTicks; |
1941 | // TODO(danvk): make it possible to set this for x- and y-axes independently. | |
1942 | var pixelsPerTick = attr('pixelsPerYLabel'); | |
1943 | for (var i = -10; i < 50; i++) { | |
1944 | if (attr("labelsKMG2")) { | |
1945 | var base_scale = Math.pow(16, i); | |
1946 | } else { | |
1947 | var base_scale = Math.pow(10, i); | |
1948 | } | |
1949 | for (var j = 0; j < mults.length; j++) { | |
1950 | scale = base_scale * mults[j]; | |
1951 | low_val = Math.floor(minV / scale) * scale; | |
1952 | high_val = Math.ceil(maxV / scale) * scale; | |
1953 | nTicks = Math.abs(high_val - low_val) / scale; | |
1954 | var spacing = self.height_ / nTicks; | |
1955 | // wish I could break out of both loops at once... | |
1956 | if (spacing > pixelsPerTick) break; | |
1957 | } | |
285a6bda | 1958 | if (spacing > pixelsPerTick) break; |
c6336f04 | 1959 | } |
0d64e596 DV |
1960 | |
1961 | // Construct the set of ticks. | |
1962 | // Allow reverse y-axis if it's explicitly requested. | |
1963 | if (low_val > high_val) scale *= -1; | |
1964 | for (var i = 0; i < nTicks; i++) { | |
1965 | var tickV = low_val + i * scale; | |
fff1de86 | 1966 | ticks.push( {v: tickV} ); |
0d64e596 | 1967 | } |
6a1aa64f DV |
1968 | } |
1969 | ||
0d64e596 | 1970 | // Add formatted labels to the ticks. |
ed11be50 DV |
1971 | var k; |
1972 | var k_labels = []; | |
f09fc545 | 1973 | if (attr("labelsKMB")) { |
ed11be50 DV |
1974 | k = 1000; |
1975 | k_labels = [ "K", "M", "B", "T" ]; | |
1976 | } | |
f09fc545 | 1977 | if (attr("labelsKMG2")) { |
ed11be50 DV |
1978 | if (k) self.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); |
1979 | k = 1024; | |
1980 | k_labels = [ "k", "M", "G", "T" ]; | |
1981 | } | |
3c1d225b JB |
1982 | var formatter = attr('yAxisLabelFormatter') ? |
1983 | attr('yAxisLabelFormatter') : attr('yValueFormatter'); | |
1984 | ||
1985 | // Determine the number of decimal places needed for the labels below by | |
1986 | // taking the maximum number of significant figures for any label. We must | |
1987 | // take the max because we can't tell if trailing 0s are significant. | |
1988 | var numDigits = 0; | |
1989 | for (var i = 0; i < ticks.length; i++) { | |
fff1de86 | 1990 | numDigits = Math.max(Dygraph.significantFigures(ticks[i].v), numDigits); |
3c1d225b | 1991 | } |
ed11be50 | 1992 | |
0d64e596 DV |
1993 | for (var i = 0; i < ticks.length; i++) { |
1994 | var tickV = ticks[i].v; | |
0af6e346 | 1995 | var absTickV = Math.abs(tickV); |
3c1d225b JB |
1996 | var label = (formatter !== undefined) ? |
1997 | formatter(tickV, numDigits) : tickV.toPrecision(numDigits); | |
1998 | if (k_labels.length > 0) { | |
ed11be50 DV |
1999 | // Round up to an appropriate unit. |
2000 | var n = k*k*k*k; | |
2001 | for (var j = 3; j >= 0; j--, n /= k) { | |
2002 | if (absTickV >= n) { | |
3c1d225b | 2003 | label = (tickV / n).toPrecision(numDigits) + k_labels[j]; |
ed11be50 DV |
2004 | break; |
2005 | } | |
afefbcdb | 2006 | } |
6a1aa64f | 2007 | } |
0d64e596 | 2008 | ticks[i].label = label; |
6a1aa64f | 2009 | } |
3c1d225b | 2010 | return {ticks: ticks, numDigits: numDigits}; |
6a1aa64f DV |
2011 | }; |
2012 | ||
5011e7a1 DV |
2013 | // Computes the range of the data series (including confidence intervals). |
2014 | // series is either [ [x1, y1], [x2, y2], ... ] or | |
2015 | // [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... | |
2016 | // Returns [low, high] | |
2017 | Dygraph.prototype.extremeValues_ = function(series) { | |
2018 | var minY = null, maxY = null; | |
2019 | ||
9922b78b | 2020 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
5011e7a1 DV |
2021 | if (bars) { |
2022 | // With custom bars, maxY is the max of the high values. | |
2023 | for (var j = 0; j < series.length; j++) { | |
2024 | var y = series[j][1][0]; | |
2025 | if (!y) continue; | |
2026 | var low = y - series[j][1][1]; | |
2027 | var high = y + series[j][1][2]; | |
2028 | if (low > y) low = y; // this can happen with custom bars, | |
2029 | if (high < y) high = y; // e.g. in tests/custom-bars.html | |
2030 | if (maxY == null || high > maxY) { | |
2031 | maxY = high; | |
2032 | } | |
2033 | if (minY == null || low < minY) { | |
2034 | minY = low; | |
2035 | } | |
2036 | } | |
2037 | } else { | |
2038 | for (var j = 0; j < series.length; j++) { | |
2039 | var y = series[j][1]; | |
d12999d3 | 2040 | if (y === null || isNaN(y)) continue; |
5011e7a1 DV |
2041 | if (maxY == null || y > maxY) { |
2042 | maxY = y; | |
2043 | } | |
2044 | if (minY == null || y < minY) { | |
2045 | minY = y; | |
2046 | } | |
2047 | } | |
2048 | } | |
2049 | ||
2050 | return [minY, maxY]; | |
2051 | }; | |
2052 | ||
6a1aa64f | 2053 | /** |
26ca7938 DV |
2054 | * This function is called once when the chart's data is changed or the options |
2055 | * dictionary is updated. It is _not_ called when the user pans or zooms. The | |
2056 | * idea is that values derived from the chart's data can be computed here, | |
2057 | * rather than every time the chart is drawn. This includes things like the | |
2058 | * number of axes, rolling averages, etc. | |
2059 | */ | |
2060 | Dygraph.prototype.predraw_ = function() { | |
2061 | // TODO(danvk): move more computations out of drawGraph_ and into here. | |
2062 | this.computeYAxes_(); | |
2063 | ||
2064 | // Create a new plotter. | |
70c80071 | 2065 | if (this.plotter_) this.plotter_.clear(); |
26ca7938 DV |
2066 | this.plotter_ = new DygraphCanvasRenderer(this, |
2067 | this.hidden_, this.layout_, | |
2068 | this.renderOptions_); | |
2069 | ||
0abfbd7e DV |
2070 | // The roller sits in the bottom left corner of the chart. We don't know where |
2071 | // this will be until the options are available, so it's positioned here. | |
8c69de65 | 2072 | this.createRollInterface_(); |
26ca7938 | 2073 | |
0abfbd7e DV |
2074 | // Same thing applies for the labelsDiv. It's right edge should be flush with |
2075 | // the right edge of the charting area (which may not be the same as the right | |
2076 | // edge of the div, if we have two y-axes. | |
2077 | this.positionLabelsDiv_(); | |
2078 | ||
26ca7938 DV |
2079 | // If the data or options have changed, then we'd better redraw. |
2080 | this.drawGraph_(); | |
2081 | }; | |
2082 | ||
2083 | /** | |
2f5e7e1a | 2084 | ======= |
26ca7938 DV |
2085 | * Update the graph with new data. This method is called when the viewing area |
2086 | * has changed. If the underlying data or options have changed, predraw_ will | |
2087 | * be called before drawGraph_ is called. | |
6a1aa64f DV |
2088 | * @private |
2089 | */ | |
26ca7938 DV |
2090 | Dygraph.prototype.drawGraph_ = function() { |
2091 | var data = this.rawData_; | |
2092 | ||
fe0b7c03 DV |
2093 | // This is used to set the second parameter to drawCallback, below. |
2094 | var is_initial_draw = this.is_initial_draw_; | |
2095 | this.is_initial_draw_ = false; | |
2096 | ||
3bd9c228 | 2097 | var minY = null, maxY = null; |
6a1aa64f | 2098 | this.layout_.removeAllDatasets(); |
285a6bda | 2099 | this.setColors_(); |
9317362d | 2100 | this.attrs_['pointSize'] = 0.5 * this.attr_('highlightCircleSize'); |
285a6bda | 2101 | |
354e15ab DE |
2102 | // Loop over the fields (series). Go from the last to the first, |
2103 | // because if they're stacked that's how we accumulate the values. | |
43af96e7 | 2104 | |
354e15ab DE |
2105 | var cumulative_y = []; // For stacked series. |
2106 | var datasets = []; | |
2107 | ||
f09fc545 DV |
2108 | var extremes = {}; // series name -> [low, high] |
2109 | ||
354e15ab DE |
2110 | // Loop over all fields and create datasets |
2111 | for (var i = data[0].length - 1; i >= 1; i--) { | |
1cf11047 DV |
2112 | if (!this.visibility()[i - 1]) continue; |
2113 | ||
f09fc545 | 2114 | var seriesName = this.attr_("labels")[i]; |
450fe64b DV |
2115 | var connectSeparatedPoints = this.attr_('connectSeparatedPoints', i); |
2116 | ||
6a1aa64f DV |
2117 | var series = []; |
2118 | for (var j = 0; j < data.length; j++) { | |
4a634fc7 | 2119 | if (data[j][i] != null || !connectSeparatedPoints) { |
f032c51d | 2120 | var date = data[j][0]; |
563c70ca | 2121 | series.push([date, data[j][i]]); |
f032c51d | 2122 | } |
6a1aa64f | 2123 | } |
2f5e7e1a DV |
2124 | |
2125 | // TODO(danvk): move this into predraw_. It's insane to do it here. | |
6a1aa64f DV |
2126 | series = this.rollingAverage(series, this.rollPeriod_); |
2127 | ||
2128 | // Prune down to the desired range, if necessary (for zooming) | |
1a26f3fb DV |
2129 | // Because there can be lines going to points outside of the visible area, |
2130 | // we actually prune to visible points, plus one on either side. | |
9922b78b | 2131 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
6a1aa64f DV |
2132 | if (this.dateWindow_) { |
2133 | var low = this.dateWindow_[0]; | |
2134 | var high= this.dateWindow_[1]; | |
2135 | var pruned = []; | |
1a26f3fb DV |
2136 | // TODO(danvk): do binary search instead of linear search. |
2137 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. | |
2138 | var firstIdx = null, lastIdx = null; | |
6a1aa64f | 2139 | for (var k = 0; k < series.length; k++) { |
1a26f3fb DV |
2140 | if (series[k][0] >= low && firstIdx === null) { |
2141 | firstIdx = k; | |
2142 | } | |
2143 | if (series[k][0] <= high) { | |
2144 | lastIdx = k; | |
6a1aa64f DV |
2145 | } |
2146 | } | |
1a26f3fb DV |
2147 | if (firstIdx === null) firstIdx = 0; |
2148 | if (firstIdx > 0) firstIdx--; | |
2149 | if (lastIdx === null) lastIdx = series.length - 1; | |
2150 | if (lastIdx < series.length - 1) lastIdx++; | |
16269f6e | 2151 | this.boundaryIds_[i-1] = [firstIdx, lastIdx]; |
1a26f3fb DV |
2152 | for (var k = firstIdx; k <= lastIdx; k++) { |
2153 | pruned.push(series[k]); | |
6a1aa64f DV |
2154 | } |
2155 | series = pruned; | |
16269f6e NAG |
2156 | } else { |
2157 | this.boundaryIds_[i-1] = [0, series.length-1]; | |
6a1aa64f DV |
2158 | } |
2159 | ||
f09fc545 | 2160 | var seriesExtremes = this.extremeValues_(series); |
5011e7a1 | 2161 | |
6a1aa64f | 2162 | if (bars) { |
354e15ab DE |
2163 | for (var j=0; j<series.length; j++) { |
2164 | val = [series[j][0], series[j][1][0], series[j][1][1], series[j][1][2]]; | |
2165 | series[j] = val; | |
2166 | } | |
43af96e7 | 2167 | } else if (this.attr_("stackedGraph")) { |
43af96e7 NK |
2168 | var l = series.length; |
2169 | var actual_y; | |
2170 | for (var j = 0; j < l; j++) { | |
354e15ab DE |
2171 | // If one data set has a NaN, let all subsequent stacked |
2172 | // sets inherit the NaN -- only start at 0 for the first set. | |
2173 | var x = series[j][0]; | |
41b0f691 | 2174 | if (cumulative_y[x] === undefined) { |
354e15ab | 2175 | cumulative_y[x] = 0; |
41b0f691 | 2176 | } |
43af96e7 NK |
2177 | |
2178 | actual_y = series[j][1]; | |
354e15ab | 2179 | cumulative_y[x] += actual_y; |
43af96e7 | 2180 | |
354e15ab | 2181 | series[j] = [x, cumulative_y[x]] |
43af96e7 | 2182 | |
41b0f691 DV |
2183 | if (cumulative_y[x] > seriesExtremes[1]) { |
2184 | seriesExtremes[1] = cumulative_y[x]; | |
2185 | } | |
2186 | if (cumulative_y[x] < seriesExtremes[0]) { | |
2187 | seriesExtremes[0] = cumulative_y[x]; | |
2188 | } | |
43af96e7 | 2189 | } |
6a1aa64f | 2190 | } |
41b0f691 | 2191 | extremes[seriesName] = seriesExtremes; |
354e15ab DE |
2192 | |
2193 | datasets[i] = series; | |
6a1aa64f DV |
2194 | } |
2195 | ||
354e15ab | 2196 | for (var i = 1; i < datasets.length; i++) { |
4523c1f6 | 2197 | if (!this.visibility()[i - 1]) continue; |
354e15ab | 2198 | this.layout_.addDataset(this.attr_("labels")[i], datasets[i]); |
43af96e7 NK |
2199 | } |
2200 | ||
33aaaca3 DV |
2201 | // TODO(danvk): this method doesn't need to return anything. |
2202 | var out = this.computeYAxisRanges_(extremes); | |
2203 | var axes = out[0]; | |
2204 | var seriesToAxisMap = out[1]; | |
2205 | this.layout_.updateOptions( { yAxes: axes, | |
2206 | seriesToAxisMap: seriesToAxisMap | |
9012dd21 | 2207 | } ); |
f09fc545 | 2208 | |
6a1aa64f DV |
2209 | this.addXTicks_(); |
2210 | ||
2211 | // Tell PlotKit to use this new data and render itself | |
d033ae1c | 2212 | this.layout_.updateOptions({dateWindow: this.dateWindow_}); |
6a1aa64f DV |
2213 | this.layout_.evaluateWithError(); |
2214 | this.plotter_.clear(); | |
2215 | this.plotter_.render(); | |
f6401bf6 | 2216 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
2f5e7e1a | 2217 | this.canvas_.height); |
599fb4ad DV |
2218 | |
2219 | if (this.attr_("drawCallback") !== null) { | |
fe0b7c03 | 2220 | this.attr_("drawCallback")(this, is_initial_draw); |
599fb4ad | 2221 | } |
6a1aa64f DV |
2222 | }; |
2223 | ||
2224 | /** | |
26ca7938 DV |
2225 | * Determine properties of the y-axes which are independent of the data |
2226 | * currently being displayed. This includes things like the number of axes and | |
2227 | * the style of the axes. It does not include the range of each axis and its | |
2228 | * tick marks. | |
2229 | * This fills in this.axes_ and this.seriesToAxisMap_. | |
2230 | * axes_ = [ { options } ] | |
2231 | * seriesToAxisMap_ = { seriesName: 0, seriesName2: 1, ... } | |
2232 | * indices are into the axes_ array. | |
f09fc545 | 2233 | */ |
26ca7938 DV |
2234 | Dygraph.prototype.computeYAxes_ = function() { |
2235 | this.axes_ = [{}]; // always have at least one y-axis. | |
2236 | this.seriesToAxisMap_ = {}; | |
2237 | ||
2238 | // Get a list of series names. | |
2239 | var labels = this.attr_("labels"); | |
1c77a3a1 | 2240 | var series = {}; |
26ca7938 | 2241 | for (var i = 1; i < labels.length; i++) series[labels[i]] = (i - 1); |
f09fc545 DV |
2242 | |
2243 | // all options which could be applied per-axis: | |
2244 | var axisOptions = [ | |
2245 | 'includeZero', | |
2246 | 'valueRange', | |
2247 | 'labelsKMB', | |
2248 | 'labelsKMG2', | |
2249 | 'pixelsPerYLabel', | |
2250 | 'yAxisLabelWidth', | |
2251 | 'axisLabelFontSize', | |
2252 | 'axisTickSize' | |
2253 | ]; | |
2254 | ||
2255 | // Copy global axis options over to the first axis. | |
2256 | for (var i = 0; i < axisOptions.length; i++) { | |
2257 | var k = axisOptions[i]; | |
2258 | var v = this.attr_(k); | |
26ca7938 | 2259 | if (v) this.axes_[0][k] = v; |
f09fc545 DV |
2260 | } |
2261 | ||
2262 | // Go through once and add all the axes. | |
26ca7938 DV |
2263 | for (var seriesName in series) { |
2264 | if (!series.hasOwnProperty(seriesName)) continue; | |
f09fc545 DV |
2265 | var axis = this.attr_("axis", seriesName); |
2266 | if (axis == null) { | |
26ca7938 | 2267 | this.seriesToAxisMap_[seriesName] = 0; |
f09fc545 DV |
2268 | continue; |
2269 | } | |
2270 | if (typeof(axis) == 'object') { | |
2271 | // Add a new axis, making a copy of its per-axis options. | |
2272 | var opts = {}; | |
26ca7938 | 2273 | Dygraph.update(opts, this.axes_[0]); |
f09fc545 DV |
2274 | Dygraph.update(opts, { valueRange: null }); // shouldn't inherit this. |
2275 | Dygraph.update(opts, axis); | |
26ca7938 DV |
2276 | this.axes_.push(opts); |
2277 | this.seriesToAxisMap_[seriesName] = this.axes_.length - 1; | |
f09fc545 DV |
2278 | } |
2279 | } | |
2280 | ||
2281 | // Go through one more time and assign series to an axis defined by another | |
2282 | // series, e.g. { 'Y1: { axis: {} }, 'Y2': { axis: 'Y1' } } | |
26ca7938 DV |
2283 | for (var seriesName in series) { |
2284 | if (!series.hasOwnProperty(seriesName)) continue; | |
f09fc545 DV |
2285 | var axis = this.attr_("axis", seriesName); |
2286 | if (typeof(axis) == 'string') { | |
26ca7938 | 2287 | if (!this.seriesToAxisMap_.hasOwnProperty(axis)) { |
f09fc545 DV |
2288 | this.error("Series " + seriesName + " wants to share a y-axis with " + |
2289 | "series " + axis + ", which does not define its own axis."); | |
2290 | return null; | |
2291 | } | |
26ca7938 DV |
2292 | var idx = this.seriesToAxisMap_[axis]; |
2293 | this.seriesToAxisMap_[seriesName] = idx; | |
f09fc545 DV |
2294 | } |
2295 | } | |
1c77a3a1 DV |
2296 | |
2297 | // Now we remove series from seriesToAxisMap_ which are not visible. We do | |
2298 | // this last so that hiding the first series doesn't destroy the axis | |
2299 | // properties of the primary axis. | |
2300 | var seriesToAxisFiltered = {}; | |
2301 | var vis = this.visibility(); | |
2302 | for (var i = 1; i < labels.length; i++) { | |
2303 | var s = labels[i]; | |
2304 | if (vis[i - 1]) seriesToAxisFiltered[s] = this.seriesToAxisMap_[s]; | |
2305 | } | |
2306 | this.seriesToAxisMap_ = seriesToAxisFiltered; | |
26ca7938 DV |
2307 | }; |
2308 | ||
2309 | /** | |
2310 | * Returns the number of y-axes on the chart. | |
2311 | * @return {Number} the number of axes. | |
2312 | */ | |
2313 | Dygraph.prototype.numAxes = function() { | |
2314 | var last_axis = 0; | |
2315 | for (var series in this.seriesToAxisMap_) { | |
2316 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; | |
2317 | var idx = this.seriesToAxisMap_[series]; | |
2318 | if (idx > last_axis) last_axis = idx; | |
2319 | } | |
2320 | return 1 + last_axis; | |
2321 | }; | |
2322 | ||
2323 | /** | |
2324 | * Determine the value range and tick marks for each axis. | |
2325 | * @param {Object} extremes A mapping from seriesName -> [low, high] | |
2326 | * This fills in the valueRange and ticks fields in each entry of this.axes_. | |
2327 | */ | |
2328 | Dygraph.prototype.computeYAxisRanges_ = function(extremes) { | |
2329 | // Build a map from axis number -> [list of series names] | |
2330 | var seriesForAxis = []; | |
2331 | for (var series in this.seriesToAxisMap_) { | |
2332 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; | |
2333 | var idx = this.seriesToAxisMap_[series]; | |
2334 | while (seriesForAxis.length <= idx) seriesForAxis.push([]); | |
2335 | seriesForAxis[idx].push(series); | |
2336 | } | |
f09fc545 DV |
2337 | |
2338 | // Compute extreme values, a span and tick marks for each axis. | |
26ca7938 DV |
2339 | for (var i = 0; i < this.axes_.length; i++) { |
2340 | var axis = this.axes_[i]; | |
d58ae307 DV |
2341 | if (axis.valueWindow) { |
2342 | // This is only set if the user has zoomed on the y-axis. It is never set | |
2343 | // by a user. It takes precedence over axis.valueRange because, if you set | |
2344 | // valueRange, you'd still expect to be able to pan. | |
2345 | axis.computedValueRange = [axis.valueWindow[0], axis.valueWindow[1]]; | |
2346 | } else if (axis.valueRange) { | |
2347 | // This is a user-set value range for this axis. | |
26ca7938 DV |
2348 | axis.computedValueRange = [axis.valueRange[0], axis.valueRange[1]]; |
2349 | } else { | |
1c77a3a1 | 2350 | // Calculate the extremes of extremes. |
f09fc545 DV |
2351 | var series = seriesForAxis[i]; |
2352 | var minY = Infinity; // extremes[series[0]][0]; | |
2353 | var maxY = -Infinity; // extremes[series[0]][1]; | |
2354 | for (var j = 0; j < series.length; j++) { | |
2355 | minY = Math.min(extremes[series[j]][0], minY); | |
e3b6727e | 2356 | maxY = Math.max(extremes[series[j]][1], maxY); |
f09fc545 DV |
2357 | } |
2358 | if (axis.includeZero && minY > 0) minY = 0; | |
2359 | ||
2360 | // Add some padding and round up to an integer to be human-friendly. | |
2361 | var span = maxY - minY; | |
2362 | // special case: if we have no sense of scale, use +/-10% of the sole value. | |
2363 | if (span == 0) { span = maxY; } | |
2364 | var maxAxisY = maxY + 0.1 * span; | |
2365 | var minAxisY = minY - 0.1 * span; | |
2366 | ||
2367 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. | |
2f5e7e1a DV |
2368 | if (!this.attr_("avoidMinZero")) { |
2369 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; | |
2370 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
2371 | } | |
f09fc545 DV |
2372 | |
2373 | if (this.attr_("includeZero")) { | |
2374 | if (maxY < 0) maxAxisY = 0; | |
2375 | if (minY > 0) minAxisY = 0; | |
2376 | } | |
2377 | ||
26ca7938 | 2378 | axis.computedValueRange = [minAxisY, maxAxisY]; |
f09fc545 DV |
2379 | } |
2380 | ||
0d64e596 DV |
2381 | // Add ticks. By default, all axes inherit the tick positions of the |
2382 | // primary axis. However, if an axis is specifically marked as having | |
2383 | // independent ticks, then that is permissible as well. | |
2384 | if (i == 0 || axis.independentTicks) { | |
3c1d225b | 2385 | var ret = |
0d64e596 DV |
2386 | Dygraph.numericTicks(axis.computedValueRange[0], |
2387 | axis.computedValueRange[1], | |
2388 | this, | |
2389 | axis); | |
3c1d225b | 2390 | axis.ticks = ret.ticks; |
6be8e54c | 2391 | this.numYDigits_ = ret.numDigits; |
0d64e596 DV |
2392 | } else { |
2393 | var p_axis = this.axes_[0]; | |
2394 | var p_ticks = p_axis.ticks; | |
2395 | var p_scale = p_axis.computedValueRange[1] - p_axis.computedValueRange[0]; | |
2396 | var scale = axis.computedValueRange[1] - axis.computedValueRange[0]; | |
2397 | var tick_values = []; | |
2398 | for (var i = 0; i < p_ticks.length; i++) { | |
2399 | var y_frac = (p_ticks[i].v - p_axis.computedValueRange[0]) / p_scale; | |
2400 | var y_val = axis.computedValueRange[0] + y_frac * scale; | |
2401 | tick_values.push(y_val); | |
2402 | } | |
2403 | ||
3c1d225b | 2404 | var ret = |
0d64e596 DV |
2405 | Dygraph.numericTicks(axis.computedValueRange[0], |
2406 | axis.computedValueRange[1], | |
2407 | this, axis, tick_values); | |
3c1d225b | 2408 | axis.ticks = ret.ticks; |
6be8e54c | 2409 | this.numYDigits_ = ret.numDigits; |
0d64e596 | 2410 | } |
f09fc545 | 2411 | } |
33aaaca3 DV |
2412 | |
2413 | return [this.axes_, this.seriesToAxisMap_]; | |
f09fc545 DV |
2414 | }; |
2415 | ||
2416 | /** | |
6a1aa64f DV |
2417 | * Calculates the rolling average of a data set. |
2418 | * If originalData is [label, val], rolls the average of those. | |
2419 | * If originalData is [label, [, it's interpreted as [value, stddev] | |
2420 | * and the roll is returned in the same form, with appropriately reduced | |
2421 | * stddev for each value. | |
2422 | * Note that this is where fractional input (i.e. '5/10') is converted into | |
2423 | * decimal values. | |
2424 | * @param {Array} originalData The data in the appropriate format (see above) | |
33aaaca3 | 2425 | * @param {Number} rollPeriod The number of days over which to average the data |
6a1aa64f | 2426 | */ |
285a6bda | 2427 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
6a1aa64f DV |
2428 | if (originalData.length < 2) |
2429 | return originalData; | |
2430 | var rollPeriod = Math.min(rollPeriod, originalData.length - 1); | |
2431 | var rollingData = []; | |
285a6bda | 2432 | var sigma = this.attr_("sigma"); |
6a1aa64f DV |
2433 | |
2434 | if (this.fractions_) { | |
2435 | var num = 0; | |
2436 | var den = 0; // numerator/denominator | |
2437 | var mult = 100.0; | |
2438 | for (var i = 0; i < originalData.length; i++) { | |
2439 | num += originalData[i][1][0]; | |
2440 | den += originalData[i][1][1]; | |
2441 | if (i - rollPeriod >= 0) { | |
2442 | num -= originalData[i - rollPeriod][1][0]; | |
2443 | den -= originalData[i - rollPeriod][1][1]; | |
2444 | } | |
2445 | ||
2446 | var date = originalData[i][0]; | |
2447 | var value = den ? num / den : 0.0; | |
285a6bda | 2448 | if (this.attr_("errorBars")) { |
6a1aa64f DV |
2449 | if (this.wilsonInterval_) { |
2450 | // For more details on this confidence interval, see: | |
2451 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval | |
2452 | if (den) { | |
2453 | var p = value < 0 ? 0 : value, n = den; | |
2454 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); | |
2455 | var denom = 1 + sigma * sigma / den; | |
2456 | var low = (p + sigma * sigma / (2 * den) - pm) / denom; | |
2457 | var high = (p + sigma * sigma / (2 * den) + pm) / denom; | |
2458 | rollingData[i] = [date, | |
2459 | [p * mult, (p - low) * mult, (high - p) * mult]]; | |
2460 | } else { | |
2461 | rollingData[i] = [date, [0, 0, 0]]; | |
2462 | } | |
2463 | } else { | |
2464 | var stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; | |
2465 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; | |
2466 | } | |
2467 | } else { | |
2468 | rollingData[i] = [date, mult * value]; | |
2469 | } | |
2470 | } | |
9922b78b | 2471 | } else if (this.attr_("customBars")) { |
f6885d6a DV |
2472 | var low = 0; |
2473 | var mid = 0; | |
2474 | var high = 0; | |
2475 | var count = 0; | |
6a1aa64f DV |
2476 | for (var i = 0; i < originalData.length; i++) { |
2477 | var data = originalData[i][1]; | |
2478 | var y = data[1]; | |
2479 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; | |
f6885d6a | 2480 | |
8b91c51f | 2481 | if (y != null && !isNaN(y)) { |
49a7d0d5 DV |
2482 | low += data[0]; |
2483 | mid += y; | |
2484 | high += data[2]; | |
2485 | count += 1; | |
2486 | } | |
f6885d6a DV |
2487 | if (i - rollPeriod >= 0) { |
2488 | var prev = originalData[i - rollPeriod]; | |
8b91c51f | 2489 | if (prev[1][1] != null && !isNaN(prev[1][1])) { |
49a7d0d5 DV |
2490 | low -= prev[1][0]; |
2491 | mid -= prev[1][1]; | |
2492 | high -= prev[1][2]; | |
2493 | count -= 1; | |
2494 | } | |
f6885d6a DV |
2495 | } |
2496 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, | |
2497 | 1.0 * (mid - low) / count, | |
2498 | 1.0 * (high - mid) / count ]]; | |
2769de62 | 2499 | } |
6a1aa64f DV |
2500 | } else { |
2501 | // Calculate the rolling average for the first rollPeriod - 1 points where | |
33aaaca3 | 2502 | // there is not enough data to roll over the full number of days |
6a1aa64f | 2503 | var num_init_points = Math.min(rollPeriod - 1, originalData.length - 2); |
285a6bda | 2504 | if (!this.attr_("errorBars")){ |
5011e7a1 DV |
2505 | if (rollPeriod == 1) { |
2506 | return originalData; | |
2507 | } | |
2508 | ||
2847c1cf | 2509 | for (var i = 0; i < originalData.length; i++) { |
6a1aa64f | 2510 | var sum = 0; |
5011e7a1 | 2511 | var num_ok = 0; |
2847c1cf DV |
2512 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
2513 | var y = originalData[j][1]; | |
8b91c51f | 2514 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 2515 | num_ok++; |
2847c1cf | 2516 | sum += originalData[j][1]; |
6a1aa64f | 2517 | } |
5011e7a1 | 2518 | if (num_ok) { |
2847c1cf | 2519 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
5011e7a1 | 2520 | } else { |
2847c1cf | 2521 | rollingData[i] = [originalData[i][0], null]; |
5011e7a1 | 2522 | } |
6a1aa64f | 2523 | } |
2847c1cf DV |
2524 | |
2525 | } else { | |
2526 | for (var i = 0; i < originalData.length; i++) { | |
6a1aa64f DV |
2527 | var sum = 0; |
2528 | var variance = 0; | |
5011e7a1 | 2529 | var num_ok = 0; |
2847c1cf | 2530 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
5011e7a1 | 2531 | var y = originalData[j][1][0]; |
8b91c51f | 2532 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 2533 | num_ok++; |
6a1aa64f DV |
2534 | sum += originalData[j][1][0]; |
2535 | variance += Math.pow(originalData[j][1][1], 2); | |
2536 | } | |
5011e7a1 DV |
2537 | if (num_ok) { |
2538 | var stddev = Math.sqrt(variance) / num_ok; | |
2539 | rollingData[i] = [originalData[i][0], | |
2540 | [sum / num_ok, sigma * stddev, sigma * stddev]]; | |
2541 | } else { | |
2542 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
2543 | } | |
6a1aa64f DV |
2544 | } |
2545 | } | |
2546 | } | |
2547 | ||
2548 | return rollingData; | |
2549 | }; | |
2550 | ||
2551 | /** | |
2552 | * Parses a date, returning the number of milliseconds since epoch. This can be | |
285a6bda DV |
2553 | * passed in as an xValueParser in the Dygraph constructor. |
2554 | * TODO(danvk): enumerate formats that this understands. | |
6a1aa64f DV |
2555 | * @param {String} A date in YYYYMMDD format. |
2556 | * @return {Number} Milliseconds since epoch. | |
2557 | * @public | |
2558 | */ | |
285a6bda | 2559 | Dygraph.dateParser = function(dateStr, self) { |
6a1aa64f | 2560 | var dateStrSlashed; |
285a6bda | 2561 | var d; |
986a5026 | 2562 | if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12' |
6a1aa64f | 2563 | dateStrSlashed = dateStr.replace("-", "/", "g"); |
353a0294 DV |
2564 | while (dateStrSlashed.search("-") != -1) { |
2565 | dateStrSlashed = dateStrSlashed.replace("-", "/"); | |
2566 | } | |
285a6bda | 2567 | d = Date.parse(dateStrSlashed); |
2769de62 | 2568 | } else if (dateStr.length == 8) { // e.g. '20090712' |
285a6bda | 2569 | // TODO(danvk): remove support for this format. It's confusing. |
6a1aa64f DV |
2570 | dateStrSlashed = dateStr.substr(0,4) + "/" + dateStr.substr(4,2) |
2571 | + "/" + dateStr.substr(6,2); | |
285a6bda | 2572 | d = Date.parse(dateStrSlashed); |
2769de62 DV |
2573 | } else { |
2574 | // Any format that Date.parse will accept, e.g. "2009/07/12" or | |
2575 | // "2009/07/12 12:34:56" | |
285a6bda DV |
2576 | d = Date.parse(dateStr); |
2577 | } | |
2578 | ||
2579 | if (!d || isNaN(d)) { | |
2580 | self.error("Couldn't parse " + dateStr + " as a date"); | |
2581 | } | |
2582 | return d; | |
2583 | }; | |
2584 | ||
2585 | /** | |
2586 | * Detects the type of the str (date or numeric) and sets the various | |
2587 | * formatting attributes in this.attrs_ based on this type. | |
2588 | * @param {String} str An x value. | |
2589 | * @private | |
2590 | */ | |
2591 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
2592 | var isDate = false; | |
2593 | if (str.indexOf('-') >= 0 || | |
2594 | str.indexOf('/') >= 0 || | |
2595 | isNaN(parseFloat(str))) { | |
2596 | isDate = true; | |
2597 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
2598 | // TODO(danvk): remove support for this format. | |
2599 | isDate = true; | |
2600 | } | |
2601 | ||
2602 | if (isDate) { | |
2603 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
2604 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2605 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2606 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda | 2607 | } else { |
6be8e54c | 2608 | this.attrs_.xValueFormatter = this.attrs_.yValueFormatter; |
285a6bda DV |
2609 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
2610 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2611 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
6a1aa64f | 2612 | } |
6a1aa64f DV |
2613 | }; |
2614 | ||
2615 | /** | |
2616 | * Parses a string in a special csv format. We expect a csv file where each | |
2617 | * line is a date point, and the first field in each line is the date string. | |
2618 | * We also expect that all remaining fields represent series. | |
285a6bda | 2619 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f DV |
2620 | * date, series1, stddev1, series2, stddev2, ... |
2621 | * @param {Array.<Object>} data See above. | |
2622 | * @private | |
285a6bda DV |
2623 | * |
2624 | * @return Array.<Object> An array with one entry for each row. These entries | |
2625 | * are an array of cells in that row. The first entry is the parsed x-value for | |
2626 | * the row. The second, third, etc. are the y-values. These can take on one of | |
2627 | * three forms, depending on the CSV and constructor parameters: | |
2628 | * 1. numeric value | |
2629 | * 2. [ value, stddev ] | |
2630 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 2631 | */ |
285a6bda | 2632 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f DV |
2633 | var ret = []; |
2634 | var lines = data.split("\n"); | |
3d67f03b DV |
2635 | |
2636 | // Use the default delimiter or fall back to a tab if that makes sense. | |
2637 | var delim = this.attr_('delimiter'); | |
2638 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { | |
2639 | delim = '\t'; | |
2640 | } | |
2641 | ||
285a6bda | 2642 | var start = 0; |
6a1aa64f | 2643 | if (this.labelsFromCSV_) { |
285a6bda | 2644 | start = 1; |
3d67f03b | 2645 | this.attrs_.labels = lines[0].split(delim); |
6a1aa64f DV |
2646 | } |
2647 | ||
03b522a4 DV |
2648 | // Parse the x as a float or return null if it's not a number. |
2649 | var parseFloatOrNull = function(x) { | |
41333ec0 | 2650 | var val = parseFloat(x); |
1f7f664b DV |
2651 | // isFinite() returns false for NaN and +/-Infinity. |
2652 | return isFinite(val) ? val : null; | |
03b522a4 DV |
2653 | }; |
2654 | ||
285a6bda DV |
2655 | var xParser; |
2656 | var defaultParserSet = false; // attempt to auto-detect x value type | |
2657 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 2658 | var outOfOrder = false; |
6a1aa64f DV |
2659 | for (var i = start; i < lines.length; i++) { |
2660 | var line = lines[i]; | |
2661 | if (line.length == 0) continue; // skip blank lines | |
3d67f03b DV |
2662 | if (line[0] == '#') continue; // skip comment lines |
2663 | var inFields = line.split(delim); | |
285a6bda | 2664 | if (inFields.length < 2) continue; |
6a1aa64f DV |
2665 | |
2666 | var fields = []; | |
285a6bda DV |
2667 | if (!defaultParserSet) { |
2668 | this.detectTypeFromString_(inFields[0]); | |
2669 | xParser = this.attr_("xValueParser"); | |
2670 | defaultParserSet = true; | |
2671 | } | |
2672 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
2673 | |
2674 | // If fractions are expected, parse the numbers as "A/B" | |
2675 | if (this.fractions_) { | |
2676 | for (var j = 1; j < inFields.length; j++) { | |
2677 | // TODO(danvk): figure out an appropriate way to flag parse errors. | |
2678 | var vals = inFields[j].split("/"); | |
03b522a4 | 2679 | fields[j] = [parseFloatOrNull(vals[0]), parseFloatOrNull(vals[1])]; |
6a1aa64f | 2680 | } |
285a6bda | 2681 | } else if (this.attr_("errorBars")) { |
6a1aa64f DV |
2682 | // If there are error bars, values are (value, stddev) pairs |
2683 | for (var j = 1; j < inFields.length; j += 2) | |
03b522a4 DV |
2684 | fields[(j + 1) / 2] = [parseFloatOrNull(inFields[j]), |
2685 | parseFloatOrNull(inFields[j + 1])]; | |
9922b78b | 2686 | } else if (this.attr_("customBars")) { |
6a1aa64f DV |
2687 | // Bars are a low;center;high tuple |
2688 | for (var j = 1; j < inFields.length; j++) { | |
2689 | var vals = inFields[j].split(";"); | |
03b522a4 DV |
2690 | fields[j] = [ parseFloatOrNull(vals[0]), |
2691 | parseFloatOrNull(vals[1]), | |
2692 | parseFloatOrNull(vals[2]) ]; | |
6a1aa64f DV |
2693 | } |
2694 | } else { | |
2695 | // Values are just numbers | |
285a6bda | 2696 | for (var j = 1; j < inFields.length; j++) { |
03b522a4 | 2697 | fields[j] = parseFloatOrNull(inFields[j]); |
285a6bda | 2698 | } |
6a1aa64f | 2699 | } |
987840a2 DV |
2700 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
2701 | outOfOrder = true; | |
2702 | } | |
6a1aa64f | 2703 | ret.push(fields); |
285a6bda DV |
2704 | |
2705 | if (fields.length != expectedCols) { | |
2706 | this.error("Number of columns in line " + i + " (" + fields.length + | |
2707 | ") does not agree with number of labels (" + expectedCols + | |
2708 | ") " + line); | |
2709 | } | |
6a1aa64f | 2710 | } |
987840a2 DV |
2711 | |
2712 | if (outOfOrder) { | |
2713 | this.warn("CSV is out of order; order it correctly to speed loading."); | |
2714 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2715 | } | |
2716 | ||
6a1aa64f DV |
2717 | return ret; |
2718 | }; | |
2719 | ||
2720 | /** | |
285a6bda DV |
2721 | * The user has provided their data as a pre-packaged JS array. If the x values |
2722 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
2723 | * are dates, we need to convert them from Date objects to ms since epoch. | |
2724 | * @param {Array.<Object>} data | |
2725 | * @return {Array.<Object>} data with numeric x values. | |
2726 | */ | |
2727 | Dygraph.prototype.parseArray_ = function(data) { | |
2728 | // Peek at the first x value to see if it's numeric. | |
2729 | if (data.length == 0) { | |
2730 | this.error("Can't plot empty data set"); | |
2731 | return null; | |
2732 | } | |
2733 | if (data[0].length == 0) { | |
2734 | this.error("Data set cannot contain an empty row"); | |
2735 | return null; | |
2736 | } | |
2737 | ||
2738 | if (this.attr_("labels") == null) { | |
2739 | this.warn("Using default labels. Set labels explicitly via 'labels' " + | |
2740 | "in the options parameter"); | |
2741 | this.attrs_.labels = [ "X" ]; | |
2742 | for (var i = 1; i < data[0].length; i++) { | |
2743 | this.attrs_.labels.push("Y" + i); | |
2744 | } | |
2745 | } | |
2746 | ||
2dda3850 | 2747 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda DV |
2748 | // Some intelligent defaults for a date x-axis. |
2749 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
bf640e56 | 2750 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
2751 | this.attrs_.xTicker = Dygraph.dateTicker; |
2752 | ||
2753 | // Assume they're all dates. | |
e3ab7b40 | 2754 | var parsedData = Dygraph.clone(data); |
285a6bda DV |
2755 | for (var i = 0; i < data.length; i++) { |
2756 | if (parsedData[i].length == 0) { | |
a323ff4a | 2757 | this.error("Row " + (1 + i) + " of data is empty"); |
285a6bda DV |
2758 | return null; |
2759 | } | |
2760 | if (parsedData[i][0] == null | |
3a909ec5 DV |
2761 | || typeof(parsedData[i][0].getTime) != 'function' |
2762 | || isNaN(parsedData[i][0].getTime())) { | |
be96a1f5 | 2763 | this.error("x value in row " + (1 + i) + " is not a Date"); |
285a6bda DV |
2764 | return null; |
2765 | } | |
2766 | parsedData[i][0] = parsedData[i][0].getTime(); | |
2767 | } | |
2768 | return parsedData; | |
2769 | } else { | |
2770 | // Some intelligent defaults for a numeric x-axis. | |
6be8e54c | 2771 | this.attrs_.xValueFormatter = this.attrs_.yValueFormatter; |
285a6bda DV |
2772 | this.attrs_.xTicker = Dygraph.numericTicks; |
2773 | return data; | |
2774 | } | |
2775 | }; | |
2776 | ||
2777 | /** | |
79420a1e DV |
2778 | * Parses a DataTable object from gviz. |
2779 | * The data is expected to have a first column that is either a date or a | |
2780 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
2781 | * between this.xValueParser_ and the type of the first column, it will be | |
a685723c | 2782 | * fixed. Fills out rawData_. |
79420a1e DV |
2783 | * @param {Array.<Object>} data See above. |
2784 | * @private | |
2785 | */ | |
285a6bda | 2786 | Dygraph.prototype.parseDataTable_ = function(data) { |
79420a1e DV |
2787 | var cols = data.getNumberOfColumns(); |
2788 | var rows = data.getNumberOfRows(); | |
2789 | ||
d955e223 | 2790 | var indepType = data.getColumnType(0); |
4440f6c8 | 2791 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda DV |
2792 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
2793 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2794 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2795 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
33127159 | 2796 | } else if (indepType == 'number') { |
6be8e54c | 2797 | this.attrs_.xValueFormatter = this.attrs_.yValueFormatter; |
285a6bda DV |
2798 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
2799 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2800 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
285a6bda | 2801 | } else { |
987840a2 DV |
2802 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
2803 | "column 1 of DataTable input (Got '" + indepType + "')"); | |
79420a1e DV |
2804 | return null; |
2805 | } | |
2806 | ||
a685723c DV |
2807 | // Array of the column indices which contain data (and not annotations). |
2808 | var colIdx = []; | |
2809 | var annotationCols = {}; // data index -> [annotation cols] | |
2810 | var hasAnnotations = false; | |
2811 | for (var i = 1; i < cols; i++) { | |
2812 | var type = data.getColumnType(i); | |
2813 | if (type == 'number') { | |
2814 | colIdx.push(i); | |
2815 | } else if (type == 'string' && this.attr_('displayAnnotations')) { | |
2816 | // This is OK -- it's an annotation column. | |
2817 | var dataIdx = colIdx[colIdx.length - 1]; | |
2818 | if (!annotationCols.hasOwnProperty(dataIdx)) { | |
2819 | annotationCols[dataIdx] = [i]; | |
2820 | } else { | |
2821 | annotationCols[dataIdx].push(i); | |
2822 | } | |
2823 | hasAnnotations = true; | |
2824 | } else { | |
2825 | this.error("Only 'number' is supported as a dependent type with Gviz." + | |
2826 | " 'string' is only supported if displayAnnotations is true"); | |
2827 | } | |
2828 | } | |
2829 | ||
2830 | // Read column labels | |
2831 | // TODO(danvk): add support back for errorBars | |
2832 | var labels = [data.getColumnLabel(0)]; | |
2833 | for (var i = 0; i < colIdx.length; i++) { | |
2834 | labels.push(data.getColumnLabel(colIdx[i])); | |
f9348814 | 2835 | if (this.attr_("errorBars")) i += 1; |
a685723c DV |
2836 | } |
2837 | this.attrs_.labels = labels; | |
2838 | cols = labels.length; | |
2839 | ||
79420a1e | 2840 | var ret = []; |
987840a2 | 2841 | var outOfOrder = false; |
a685723c | 2842 | var annotations = []; |
79420a1e DV |
2843 | for (var i = 0; i < rows; i++) { |
2844 | var row = []; | |
debe4434 DV |
2845 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
2846 | data.getValue(i, 0) === null) { | |
129569a5 FD |
2847 | this.warn("Ignoring row " + i + |
2848 | " of DataTable because of undefined or null first column."); | |
debe4434 DV |
2849 | continue; |
2850 | } | |
2851 | ||
c21d2c2d | 2852 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
2853 | row.push(data.getValue(i, 0).getTime()); |
2854 | } else { | |
2855 | row.push(data.getValue(i, 0)); | |
2856 | } | |
3e3f84e4 | 2857 | if (!this.attr_("errorBars")) { |
a685723c DV |
2858 | for (var j = 0; j < colIdx.length; j++) { |
2859 | var col = colIdx[j]; | |
2860 | row.push(data.getValue(i, col)); | |
2861 | if (hasAnnotations && | |
2862 | annotationCols.hasOwnProperty(col) && | |
2863 | data.getValue(i, annotationCols[col][0]) != null) { | |
2864 | var ann = {}; | |
2865 | ann.series = data.getColumnLabel(col); | |
2866 | ann.xval = row[0]; | |
2867 | ann.shortText = String.fromCharCode(65 /* A */ + annotations.length) | |
2868 | ann.text = ''; | |
2869 | for (var k = 0; k < annotationCols[col].length; k++) { | |
2870 | if (k) ann.text += "\n"; | |
2871 | ann.text += data.getValue(i, annotationCols[col][k]); | |
2872 | } | |
2873 | annotations.push(ann); | |
2874 | } | |
3e3f84e4 DV |
2875 | } |
2876 | } else { | |
2877 | for (var j = 0; j < cols - 1; j++) { | |
2878 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); | |
2879 | } | |
79420a1e | 2880 | } |
987840a2 DV |
2881 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
2882 | outOfOrder = true; | |
2883 | } | |
1f7f664b DV |
2884 | |
2885 | // Strip out infinities, which give dygraphs problems later on. | |
2886 | for (var j = 0; j < row.length; j++) { | |
2887 | if (!isFinite(row[j])) row[j] = null; | |
2888 | } | |
243d96e8 | 2889 | ret.push(row); |
79420a1e | 2890 | } |
987840a2 DV |
2891 | |
2892 | if (outOfOrder) { | |
2893 | this.warn("DataTable is out of order; order it correctly to speed loading."); | |
2894 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2895 | } | |
a685723c DV |
2896 | this.rawData_ = ret; |
2897 | ||
2898 | if (annotations.length > 0) { | |
2899 | this.setAnnotations(annotations, true); | |
2900 | } | |
79420a1e DV |
2901 | } |
2902 | ||
24e5350c | 2903 | // These functions are all based on MochiKit. |
fc80a396 DV |
2904 | Dygraph.update = function (self, o) { |
2905 | if (typeof(o) != 'undefined' && o !== null) { | |
2906 | for (var k in o) { | |
85b99f0b DV |
2907 | if (o.hasOwnProperty(k)) { |
2908 | self[k] = o[k]; | |
2909 | } | |
fc80a396 DV |
2910 | } |
2911 | } | |
2912 | return self; | |
2913 | }; | |
2914 | ||
2dda3850 DV |
2915 | Dygraph.isArrayLike = function (o) { |
2916 | var typ = typeof(o); | |
2917 | if ( | |
c21d2c2d | 2918 | (typ != 'object' && !(typ == 'function' && |
2dda3850 DV |
2919 | typeof(o.item) == 'function')) || |
2920 | o === null || | |
2921 | typeof(o.length) != 'number' || | |
2922 | o.nodeType === 3 | |
2923 | ) { | |
2924 | return false; | |
2925 | } | |
2926 | return true; | |
2927 | }; | |
2928 | ||
2929 | Dygraph.isDateLike = function (o) { | |
2930 | if (typeof(o) != "object" || o === null || | |
2931 | typeof(o.getTime) != 'function') { | |
2932 | return false; | |
2933 | } | |
2934 | return true; | |
2935 | }; | |
2936 | ||
e3ab7b40 DV |
2937 | Dygraph.clone = function(o) { |
2938 | // TODO(danvk): figure out how MochiKit's version works | |
2939 | var r = []; | |
2940 | for (var i = 0; i < o.length; i++) { | |
2941 | if (Dygraph.isArrayLike(o[i])) { | |
2942 | r.push(Dygraph.clone(o[i])); | |
2943 | } else { | |
2944 | r.push(o[i]); | |
2945 | } | |
2946 | } | |
2947 | return r; | |
24e5350c DV |
2948 | }; |
2949 | ||
2dda3850 | 2950 | |
79420a1e | 2951 | /** |
6a1aa64f DV |
2952 | * Get the CSV data. If it's in a function, call that function. If it's in a |
2953 | * file, do an XMLHttpRequest to get it. | |
2954 | * @private | |
2955 | */ | |
285a6bda | 2956 | Dygraph.prototype.start_ = function() { |
6a1aa64f | 2957 | if (typeof this.file_ == 'function') { |
285a6bda | 2958 | // CSV string. Pretend we got it via XHR. |
6a1aa64f | 2959 | this.loadedEvent_(this.file_()); |
2dda3850 | 2960 | } else if (Dygraph.isArrayLike(this.file_)) { |
285a6bda | 2961 | this.rawData_ = this.parseArray_(this.file_); |
26ca7938 | 2962 | this.predraw_(); |
79420a1e DV |
2963 | } else if (typeof this.file_ == 'object' && |
2964 | typeof this.file_.getColumnRange == 'function') { | |
2965 | // must be a DataTable from gviz. | |
a685723c | 2966 | this.parseDataTable_(this.file_); |
26ca7938 | 2967 | this.predraw_(); |
285a6bda DV |
2968 | } else if (typeof this.file_ == 'string') { |
2969 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. | |
2970 | if (this.file_.indexOf('\n') >= 0) { | |
2971 | this.loadedEvent_(this.file_); | |
2972 | } else { | |
2973 | var req = new XMLHttpRequest(); | |
2974 | var caller = this; | |
2975 | req.onreadystatechange = function () { | |
2976 | if (req.readyState == 4) { | |
2977 | if (req.status == 200) { | |
2978 | caller.loadedEvent_(req.responseText); | |
2979 | } | |
6a1aa64f | 2980 | } |
285a6bda | 2981 | }; |
6a1aa64f | 2982 | |
285a6bda DV |
2983 | req.open("GET", this.file_, true); |
2984 | req.send(null); | |
2985 | } | |
2986 | } else { | |
2987 | this.error("Unknown data format: " + (typeof this.file_)); | |
6a1aa64f DV |
2988 | } |
2989 | }; | |
2990 | ||
2991 | /** | |
2992 | * Changes various properties of the graph. These can include: | |
2993 | * <ul> | |
2994 | * <li>file: changes the source data for the graph</li> | |
2995 | * <li>errorBars: changes whether the data contains stddev</li> | |
2996 | * </ul> | |
2997 | * @param {Object} attrs The new properties and values | |
2998 | */ | |
285a6bda DV |
2999 | Dygraph.prototype.updateOptions = function(attrs) { |
3000 | // TODO(danvk): this is a mess. Rethink this function. | |
c65f2303 | 3001 | if ('rollPeriod' in attrs) { |
6a1aa64f DV |
3002 | this.rollPeriod_ = attrs.rollPeriod; |
3003 | } | |
c65f2303 | 3004 | if ('dateWindow' in attrs) { |
6a1aa64f DV |
3005 | this.dateWindow_ = attrs.dateWindow; |
3006 | } | |
450fe64b DV |
3007 | |
3008 | // TODO(danvk): validate per-series options. | |
46dde5f9 DV |
3009 | // Supported: |
3010 | // strokeWidth | |
3011 | // pointSize | |
3012 | // drawPoints | |
3013 | // highlightCircleSize | |
450fe64b | 3014 | |
fc80a396 | 3015 | Dygraph.update(this.user_attrs_, attrs); |
87bb7958 | 3016 | Dygraph.update(this.renderOptions_, attrs); |
285a6bda DV |
3017 | |
3018 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
3019 | ||
3020 | // TODO(danvk): this doesn't match the constructor logic | |
3021 | this.layout_.updateOptions({ 'errorBars': this.attr_("errorBars") }); | |
5e50289f | 3022 | if (attrs['file']) { |
6a1aa64f DV |
3023 | this.file_ = attrs['file']; |
3024 | this.start_(); | |
3025 | } else { | |
26ca7938 | 3026 | this.predraw_(); |
6a1aa64f DV |
3027 | } |
3028 | }; | |
3029 | ||
3030 | /** | |
697e70b2 DV |
3031 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
3032 | * containing div (which has presumably changed size since the dygraph was | |
3033 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
3034 | * |
3035 | * This is far more efficient than destroying and re-instantiating a | |
3036 | * Dygraph, since it doesn't have to reparse the underlying data. | |
3037 | * | |
697e70b2 DV |
3038 | * @param {Number} width Width (in pixels) |
3039 | * @param {Number} height Height (in pixels) | |
3040 | */ | |
3041 | Dygraph.prototype.resize = function(width, height) { | |
e8c7ef86 DV |
3042 | if (this.resize_lock) { |
3043 | return; | |
3044 | } | |
3045 | this.resize_lock = true; | |
3046 | ||
697e70b2 DV |
3047 | if ((width === null) != (height === null)) { |
3048 | this.warn("Dygraph.resize() should be called with zero parameters or " + | |
3049 | "two non-NULL parameters. Pretending it was zero."); | |
3050 | width = height = null; | |
3051 | } | |
3052 | ||
b16e6369 | 3053 | // TODO(danvk): there should be a clear() method. |
697e70b2 | 3054 | this.maindiv_.innerHTML = ""; |
b16e6369 DV |
3055 | this.attrs_.labelsDiv = null; |
3056 | ||
697e70b2 DV |
3057 | if (width) { |
3058 | this.maindiv_.style.width = width + "px"; | |
3059 | this.maindiv_.style.height = height + "px"; | |
3060 | this.width_ = width; | |
3061 | this.height_ = height; | |
3062 | } else { | |
3063 | this.width_ = this.maindiv_.offsetWidth; | |
3064 | this.height_ = this.maindiv_.offsetHeight; | |
3065 | } | |
3066 | ||
3067 | this.createInterface_(); | |
26ca7938 | 3068 | this.predraw_(); |
e8c7ef86 DV |
3069 | |
3070 | this.resize_lock = false; | |
697e70b2 DV |
3071 | }; |
3072 | ||
3073 | /** | |
33aaaca3 | 3074 | * Adjusts the number of days in the rolling average. Updates the graph to |
6a1aa64f | 3075 | * reflect the new averaging period. |
33aaaca3 | 3076 | * @param {Number} length Number of days over which to average the data. |
6a1aa64f | 3077 | */ |
285a6bda | 3078 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f | 3079 | this.rollPeriod_ = length; |
26ca7938 | 3080 | this.predraw_(); |
6a1aa64f | 3081 | }; |
540d00f1 | 3082 | |
f8cfec73 | 3083 | /** |
1cf11047 DV |
3084 | * Returns a boolean array of visibility statuses. |
3085 | */ | |
3086 | Dygraph.prototype.visibility = function() { | |
3087 | // Do lazy-initialization, so that this happens after we know the number of | |
3088 | // data series. | |
3089 | if (!this.attr_("visibility")) { | |
f38dec01 | 3090 | this.attrs_["visibility"] = []; |
1cf11047 DV |
3091 | } |
3092 | while (this.attr_("visibility").length < this.rawData_[0].length - 1) { | |
f38dec01 | 3093 | this.attr_("visibility").push(true); |
1cf11047 DV |
3094 | } |
3095 | return this.attr_("visibility"); | |
3096 | }; | |
3097 | ||
3098 | /** | |
3099 | * Changes the visiblity of a series. | |
3100 | */ | |
3101 | Dygraph.prototype.setVisibility = function(num, value) { | |
3102 | var x = this.visibility(); | |
a6c109c1 | 3103 | if (num < 0 || num >= x.length) { |
1cf11047 DV |
3104 | this.warn("invalid series number in setVisibility: " + num); |
3105 | } else { | |
3106 | x[num] = value; | |
26ca7938 | 3107 | this.predraw_(); |
1cf11047 DV |
3108 | } |
3109 | }; | |
3110 | ||
3111 | /** | |
5c528fa2 DV |
3112 | * Update the list of annotations and redraw the chart. |
3113 | */ | |
a685723c | 3114 | Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { |
3c51ab74 DV |
3115 | // Only add the annotation CSS rule once we know it will be used. |
3116 | Dygraph.addAnnotationRule(); | |
5c528fa2 DV |
3117 | this.annotations_ = ann; |
3118 | this.layout_.setAnnotations(this.annotations_); | |
a685723c | 3119 | if (!suppressDraw) { |
26ca7938 | 3120 | this.predraw_(); |
a685723c | 3121 | } |
5c528fa2 DV |
3122 | }; |
3123 | ||
3124 | /** | |
3125 | * Return the list of annotations. | |
3126 | */ | |
3127 | Dygraph.prototype.annotations = function() { | |
3128 | return this.annotations_; | |
3129 | }; | |
3130 | ||
46dde5f9 DV |
3131 | /** |
3132 | * Get the index of a series (column) given its name. The first column is the | |
3133 | * x-axis, so the data series start with index 1. | |
3134 | */ | |
3135 | Dygraph.prototype.indexFromSetName = function(name) { | |
3136 | var labels = this.attr_("labels"); | |
3137 | for (var i = 0; i < labels.length; i++) { | |
3138 | if (labels[i] == name) return i; | |
3139 | } | |
3140 | return null; | |
3141 | }; | |
3142 | ||
5c528fa2 DV |
3143 | Dygraph.addAnnotationRule = function() { |
3144 | if (Dygraph.addedAnnotationCSS) return; | |
3145 | ||
5c528fa2 DV |
3146 | var rule = "border: 1px solid black; " + |
3147 | "background-color: white; " + | |
3148 | "text-align: center;"; | |
22186871 DV |
3149 | |
3150 | var styleSheetElement = document.createElement("style"); | |
3151 | styleSheetElement.type = "text/css"; | |
3152 | document.getElementsByTagName("head")[0].appendChild(styleSheetElement); | |
3153 | ||
3154 | // Find the first style sheet that we can access. | |
3155 | // We may not add a rule to a style sheet from another domain for security | |
3156 | // reasons. This sometimes comes up when using gviz, since the Google gviz JS | |
3157 | // adds its own style sheets from google.com. | |
3158 | for (var i = 0; i < document.styleSheets.length; i++) { | |
3159 | if (document.styleSheets[i].disabled) continue; | |
3160 | var mysheet = document.styleSheets[i]; | |
3161 | try { | |
3162 | if (mysheet.insertRule) { // Firefox | |
3163 | var idx = mysheet.cssRules ? mysheet.cssRules.length : 0; | |
3164 | mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", idx); | |
3165 | } else if (mysheet.addRule) { // IE | |
3166 | mysheet.addRule(".dygraphDefaultAnnotation", rule); | |
3167 | } | |
3168 | Dygraph.addedAnnotationCSS = true; | |
3169 | return; | |
3170 | } catch(err) { | |
3171 | // Was likely a security exception. | |
3172 | } | |
5c528fa2 DV |
3173 | } |
3174 | ||
22186871 | 3175 | this.warn("Unable to add default annotation CSS rule; display may be off."); |
5c528fa2 DV |
3176 | } |
3177 | ||
3178 | /** | |
f8cfec73 DV |
3179 | * Create a new canvas element. This is more complex than a simple |
3180 | * document.createElement("canvas") because of IE and excanvas. | |
3181 | */ | |
3182 | Dygraph.createCanvas = function() { | |
3183 | var canvas = document.createElement("canvas"); | |
3184 | ||
3185 | isIE = (/MSIE/.test(navigator.userAgent) && !window.opera); | |
8b8f2d59 | 3186 | if (isIE && (typeof(G_vmlCanvasManager) != 'undefined')) { |
f8cfec73 DV |
3187 | canvas = G_vmlCanvasManager.initElement(canvas); |
3188 | } | |
3189 | ||
3190 | return canvas; | |
3191 | }; | |
3192 | ||
540d00f1 DV |
3193 | |
3194 | /** | |
285a6bda | 3195 | * A wrapper around Dygraph that implements the gviz API. |
540d00f1 DV |
3196 | * @param {Object} container The DOM object the visualization should live in. |
3197 | */ | |
285a6bda | 3198 | Dygraph.GVizChart = function(container) { |
540d00f1 DV |
3199 | this.container = container; |
3200 | } | |
3201 | ||
285a6bda | 3202 | Dygraph.GVizChart.prototype.draw = function(data, options) { |
c91f4ae8 DV |
3203 | // Clear out any existing dygraph. |
3204 | // TODO(danvk): would it make more sense to simply redraw using the current | |
3205 | // date_graph object? | |
540d00f1 | 3206 | this.container.innerHTML = ''; |
c91f4ae8 DV |
3207 | if (typeof(this.date_graph) != 'undefined') { |
3208 | this.date_graph.destroy(); | |
3209 | } | |
3210 | ||
285a6bda | 3211 | this.date_graph = new Dygraph(this.container, data, options); |
540d00f1 | 3212 | } |
285a6bda | 3213 | |
239c712d NAG |
3214 | /** |
3215 | * Google charts compatible setSelection | |
50360fd0 | 3216 | * Only row selection is supported, all points in the row will be highlighted |
239c712d NAG |
3217 | * @param {Array} array of the selected cells |
3218 | * @public | |
3219 | */ | |
3220 | Dygraph.GVizChart.prototype.setSelection = function(selection_array) { | |
3221 | var row = false; | |
3222 | if (selection_array.length) { | |
3223 | row = selection_array[0].row; | |
3224 | } | |
3225 | this.date_graph.setSelection(row); | |
3226 | } | |
3227 | ||
103b7292 NAG |
3228 | /** |
3229 | * Google charts compatible getSelection implementation | |
3230 | * @return {Array} array of the selected cells | |
3231 | * @public | |
3232 | */ | |
3233 | Dygraph.GVizChart.prototype.getSelection = function() { | |
3234 | var selection = []; | |
50360fd0 | 3235 | |
103b7292 | 3236 | var row = this.date_graph.getSelection(); |
50360fd0 | 3237 | |
103b7292 | 3238 | if (row < 0) return selection; |
50360fd0 | 3239 | |
103b7292 NAG |
3240 | col = 1; |
3241 | for (var i in this.date_graph.layout_.datasets) { | |
3242 | selection.push({row: row, column: col}); | |
3243 | col++; | |
3244 | } | |
3245 | ||
3246 | return selection; | |
3247 | } | |
3248 | ||
285a6bda DV |
3249 | // Older pages may still use this name. |
3250 | DateGraph = Dygraph; |