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6a1aa64f DV |
1 | // Copyright 2006 Dan Vanderkam (danvdk@gmail.com) |
2 | // All Rights Reserved. | |
3 | ||
4 | /** | |
5 | * @fileoverview Creates an interactive, zoomable graph based on a CSV file or | |
285a6bda DV |
6 | * string. Dygraph can handle multiple series with or without error bars. The |
7 | * date/value ranges will be automatically set. Dygraph uses the | |
6a1aa64f DV |
8 | * <canvas> tag, so it only works in FF1.5+. |
9 | * @author danvdk@gmail.com (Dan Vanderkam) | |
10 | ||
11 | Usage: | |
12 | <div id="graphdiv" style="width:800px; height:500px;"></div> | |
13 | <script type="text/javascript"> | |
285a6bda DV |
14 | new Dygraph(document.getElementById("graphdiv"), |
15 | "datafile.csv", // CSV file with headers | |
16 | { }); // options | |
6a1aa64f DV |
17 | </script> |
18 | ||
19 | The CSV file is of the form | |
20 | ||
285a6bda | 21 | Date,SeriesA,SeriesB,SeriesC |
6a1aa64f DV |
22 | YYYYMMDD,A1,B1,C1 |
23 | YYYYMMDD,A2,B2,C2 | |
24 | ||
6a1aa64f DV |
25 | If the 'errorBars' option is set in the constructor, the input should be of |
26 | the form | |
27 | ||
285a6bda | 28 | Date,SeriesA,SeriesB,... |
6a1aa64f DV |
29 | YYYYMMDD,A1,sigmaA1,B1,sigmaB1,... |
30 | YYYYMMDD,A2,sigmaA2,B2,sigmaB2,... | |
31 | ||
32 | If the 'fractions' option is set, the input should be of the form: | |
33 | ||
285a6bda | 34 | Date,SeriesA,SeriesB,... |
6a1aa64f DV |
35 | YYYYMMDD,A1/B1,A2/B2,... |
36 | YYYYMMDD,A1/B1,A2/B2,... | |
37 | ||
38 | And error bars will be calculated automatically using a binomial distribution. | |
39 | ||
285a6bda | 40 | For further documentation and examples, see http://www.danvk.org/dygraphs |
6a1aa64f DV |
41 | |
42 | */ | |
43 | ||
44 | /** | |
45 | * An interactive, zoomable graph | |
46 | * @param {String | Function} file A file containing CSV data or a function that | |
47 | * returns this data. The expected format for each line is | |
48 | * YYYYMMDD,val1,val2,... or, if attrs.errorBars is set, | |
49 | * YYYYMMDD,val1,stddev1,val2,stddev2,... | |
6a1aa64f DV |
50 | * @param {Object} attrs Various other attributes, e.g. errorBars determines |
51 | * whether the input data contains error ranges. | |
52 | */ | |
285a6bda DV |
53 | Dygraph = function(div, data, opts) { |
54 | if (arguments.length > 0) { | |
55 | if (arguments.length == 4) { | |
56 | // Old versions of dygraphs took in the series labels as a constructor | |
57 | // parameter. This doesn't make sense anymore, but it's easy to continue | |
58 | // to support this usage. | |
59 | this.warn("Using deprecated four-argument dygraph constructor"); | |
60 | this.__old_init__(div, data, arguments[2], arguments[3]); | |
61 | } else { | |
62 | this.__init__(div, data, opts); | |
63 | } | |
64 | } | |
6a1aa64f DV |
65 | }; |
66 | ||
285a6bda DV |
67 | Dygraph.NAME = "Dygraph"; |
68 | Dygraph.VERSION = "1.2"; | |
69 | Dygraph.__repr__ = function() { | |
6a1aa64f DV |
70 | return "[" + this.NAME + " " + this.VERSION + "]"; |
71 | }; | |
285a6bda | 72 | Dygraph.toString = function() { |
6a1aa64f DV |
73 | return this.__repr__(); |
74 | }; | |
75 | ||
76 | // Various default values | |
285a6bda DV |
77 | Dygraph.DEFAULT_ROLL_PERIOD = 1; |
78 | Dygraph.DEFAULT_WIDTH = 480; | |
79 | Dygraph.DEFAULT_HEIGHT = 320; | |
80 | Dygraph.AXIS_LINE_WIDTH = 0.3; | |
6a1aa64f | 81 | |
8e4a6af3 | 82 | // Default attribute values. |
285a6bda | 83 | Dygraph.DEFAULT_ATTRS = { |
a9fc39ab | 84 | highlightCircleSize: 3, |
8e4a6af3 | 85 | pixelsPerXLabel: 60, |
c6336f04 | 86 | pixelsPerYLabel: 30, |
285a6bda | 87 | |
8e4a6af3 DV |
88 | labelsDivWidth: 250, |
89 | labelsDivStyles: { | |
90 | // TODO(danvk): move defaults from createStatusMessage_ here. | |
285a6bda DV |
91 | }, |
92 | labelsSeparateLines: false, | |
bcd3ebf0 | 93 | labelsShowZeroValues: true, |
285a6bda | 94 | labelsKMB: false, |
afefbcdb | 95 | labelsKMG2: false, |
d160cc3b | 96 | showLabelsOnHighlight: true, |
12e4c741 | 97 | |
029da4b6 | 98 | yValueFormatter: function(x) { return Dygraph.round_(x, 2); }, |
285a6bda DV |
99 | |
100 | strokeWidth: 1.0, | |
8e4a6af3 | 101 | |
8846615a DV |
102 | axisTickSize: 3, |
103 | axisLabelFontSize: 14, | |
104 | xAxisLabelWidth: 50, | |
105 | yAxisLabelWidth: 50, | |
bf640e56 | 106 | xAxisLabelFormatter: Dygraph.dateAxisFormatter, |
8846615a | 107 | rightGap: 5, |
285a6bda DV |
108 | |
109 | showRoller: false, | |
110 | xValueFormatter: Dygraph.dateString_, | |
111 | xValueParser: Dygraph.dateParser, | |
112 | xTicker: Dygraph.dateTicker, | |
113 | ||
3d67f03b DV |
114 | delimiter: ',', |
115 | ||
ff00d3e2 | 116 | logScale: false, |
285a6bda DV |
117 | sigma: 2.0, |
118 | errorBars: false, | |
119 | fractions: false, | |
120 | wilsonInterval: true, // only relevant if fractions is true | |
5954ef32 | 121 | customBars: false, |
43af96e7 NK |
122 | fillGraph: false, |
123 | fillAlpha: 0.15, | |
f032c51d | 124 | connectSeparatedPoints: false, |
43af96e7 NK |
125 | |
126 | stackedGraph: false, | |
afdc483f NN |
127 | hideOverlayOnMouseOut: true, |
128 | ||
00c281d4 NN |
129 | stepPlot: false, |
130 | avoidMinZero: false | |
285a6bda DV |
131 | }; |
132 | ||
133 | // Various logging levels. | |
134 | Dygraph.DEBUG = 1; | |
135 | Dygraph.INFO = 2; | |
136 | Dygraph.WARNING = 3; | |
137 | Dygraph.ERROR = 3; | |
138 | ||
39b0e098 RK |
139 | // Directions for panning and zooming. Use bit operations when combined |
140 | // values are possible. | |
141 | Dygraph.HORIZONTAL = 1; | |
142 | Dygraph.VERTICAL = 2; | |
143 | ||
5c528fa2 DV |
144 | // Used for initializing annotation CSS rules only once. |
145 | Dygraph.addedAnnotationCSS = false; | |
146 | ||
285a6bda DV |
147 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { |
148 | // Labels is no longer a constructor parameter, since it's typically set | |
149 | // directly from the data source. It also conains a name for the x-axis, | |
150 | // which the previous constructor form did not. | |
151 | if (labels != null) { | |
152 | var new_labels = ["Date"]; | |
153 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); | |
fc80a396 | 154 | Dygraph.update(attrs, { 'labels': new_labels }); |
285a6bda DV |
155 | } |
156 | this.__init__(div, file, attrs); | |
8e4a6af3 DV |
157 | }; |
158 | ||
6a1aa64f | 159 | /** |
285a6bda | 160 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
6a1aa64f DV |
161 | * and interaction <canvas> inside of it. See the constructor for details |
162 | * on the parameters. | |
12e4c741 | 163 | * @param {Element} div the Element to render the graph into. |
6a1aa64f | 164 | * @param {String | Function} file Source data |
6a1aa64f DV |
165 | * @param {Object} attrs Miscellaneous other options |
166 | * @private | |
167 | */ | |
285a6bda DV |
168 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
169 | // Support two-argument constructor | |
170 | if (attrs == null) { attrs = {}; } | |
171 | ||
6a1aa64f | 172 | // Copy the important bits into the object |
32988383 | 173 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
6a1aa64f | 174 | this.maindiv_ = div; |
6a1aa64f | 175 | this.file_ = file; |
285a6bda | 176 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
6a1aa64f | 177 | this.previousVerticalX_ = -1; |
6a1aa64f | 178 | this.fractions_ = attrs.fractions || false; |
6a1aa64f | 179 | this.dateWindow_ = attrs.dateWindow || null; |
8b83c6cc RK |
180 | // valueRange and valueWindow are similar, but not the same. valueRange is a |
181 | // locally-stored copy of the attribute. valueWindow starts off the same as | |
182 | // valueRange but is impacted by zoom or pan effects. valueRange is kept | |
183 | // around to restore the original value back to valueRange. | |
6a1aa64f | 184 | this.valueRange_ = attrs.valueRange || null; |
8b83c6cc RK |
185 | this.valueWindow_ = this.valueRange_; |
186 | ||
6a1aa64f | 187 | this.wilsonInterval_ = attrs.wilsonInterval || true; |
fe0b7c03 | 188 | this.is_initial_draw_ = true; |
5c528fa2 | 189 | this.annotations_ = []; |
8e4a6af3 | 190 | |
f7d6278e DV |
191 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
192 | // div, then only one will be drawn. | |
193 | div.innerHTML = ""; | |
194 | ||
c21d2c2d | 195 | // If the div isn't already sized then inherit from our attrs or |
196 | // give it a default size. | |
285a6bda | 197 | if (div.style.width == '') { |
c21d2c2d | 198 | div.style.width = attrs.width || Dygraph.DEFAULT_WIDTH + "px"; |
285a6bda DV |
199 | } |
200 | if (div.style.height == '') { | |
c21d2c2d | 201 | div.style.height = attrs.height || Dygraph.DEFAULT_HEIGHT + "px"; |
32988383 | 202 | } |
285a6bda DV |
203 | this.width_ = parseInt(div.style.width, 10); |
204 | this.height_ = parseInt(div.style.height, 10); | |
c21d2c2d | 205 | // The div might have been specified as percent of the current window size, |
206 | // convert that to an appropriate number of pixels. | |
207 | if (div.style.width.indexOf("%") == div.style.width.length - 1) { | |
c6f45033 | 208 | this.width_ = div.offsetWidth; |
c21d2c2d | 209 | } |
210 | if (div.style.height.indexOf("%") == div.style.height.length - 1) { | |
c6f45033 | 211 | this.height_ = div.offsetHeight; |
c21d2c2d | 212 | } |
32988383 | 213 | |
10a6456d DV |
214 | if (this.width_ == 0) { |
215 | this.error("dygraph has zero width. Please specify a width in pixels."); | |
216 | } | |
217 | if (this.height_ == 0) { | |
218 | this.error("dygraph has zero height. Please specify a height in pixels."); | |
219 | } | |
220 | ||
344ba8c0 | 221 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
43af96e7 NK |
222 | if (attrs['stackedGraph']) { |
223 | attrs['fillGraph'] = true; | |
224 | // TODO(nikhilk): Add any other stackedGraph checks here. | |
225 | } | |
226 | ||
285a6bda DV |
227 | // Dygraphs has many options, some of which interact with one another. |
228 | // To keep track of everything, we maintain two sets of options: | |
229 | // | |
c21d2c2d | 230 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
231 | // this.attrs_ defaults, options derived from user_attrs_, data. |
232 | // | |
233 | // Options are then accessed this.attr_('attr'), which first looks at | |
234 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
235 | // defaults without overriding behavior that the user specifically asks for. | |
236 | this.user_attrs_ = {}; | |
fc80a396 | 237 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 238 | |
285a6bda | 239 | this.attrs_ = {}; |
fc80a396 | 240 | Dygraph.update(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 241 | |
16269f6e | 242 | this.boundaryIds_ = []; |
6a1aa64f | 243 | |
285a6bda DV |
244 | // Make a note of whether labels will be pulled from the CSV file. |
245 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
6a1aa64f DV |
246 | |
247 | // Create the containing DIV and other interactive elements | |
248 | this.createInterface_(); | |
249 | ||
738fc797 | 250 | this.start_(); |
6a1aa64f DV |
251 | }; |
252 | ||
227b93cc DV |
253 | Dygraph.prototype.attr_ = function(name, seriesName) { |
254 | if (seriesName && | |
255 | typeof(this.user_attrs_[seriesName]) != 'undefined' && | |
256 | this.user_attrs_[seriesName] != null && | |
257 | typeof(this.user_attrs_[seriesName][name]) != 'undefined') { | |
258 | return this.user_attrs_[seriesName][name]; | |
450fe64b | 259 | } else if (typeof(this.user_attrs_[name]) != 'undefined') { |
285a6bda DV |
260 | return this.user_attrs_[name]; |
261 | } else if (typeof(this.attrs_[name]) != 'undefined') { | |
262 | return this.attrs_[name]; | |
263 | } else { | |
264 | return null; | |
265 | } | |
266 | }; | |
267 | ||
268 | // TODO(danvk): any way I can get the line numbers to be this.warn call? | |
269 | Dygraph.prototype.log = function(severity, message) { | |
270 | if (typeof(console) != 'undefined') { | |
271 | switch (severity) { | |
272 | case Dygraph.DEBUG: | |
273 | console.debug('dygraphs: ' + message); | |
274 | break; | |
275 | case Dygraph.INFO: | |
276 | console.info('dygraphs: ' + message); | |
277 | break; | |
278 | case Dygraph.WARNING: | |
279 | console.warn('dygraphs: ' + message); | |
280 | break; | |
281 | case Dygraph.ERROR: | |
282 | console.error('dygraphs: ' + message); | |
283 | break; | |
284 | } | |
285 | } | |
286 | } | |
287 | Dygraph.prototype.info = function(message) { | |
288 | this.log(Dygraph.INFO, message); | |
289 | } | |
290 | Dygraph.prototype.warn = function(message) { | |
291 | this.log(Dygraph.WARNING, message); | |
292 | } | |
293 | Dygraph.prototype.error = function(message) { | |
294 | this.log(Dygraph.ERROR, message); | |
295 | } | |
296 | ||
6a1aa64f DV |
297 | /** |
298 | * Returns the current rolling period, as set by the user or an option. | |
299 | * @return {Number} The number of days in the rolling window | |
300 | */ | |
285a6bda | 301 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 302 | return this.rollPeriod_; |
76171648 DV |
303 | }; |
304 | ||
599fb4ad DV |
305 | /** |
306 | * Returns the currently-visible x-range. This can be affected by zooming, | |
307 | * panning or a call to updateOptions. | |
308 | * Returns a two-element array: [left, right]. | |
309 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
310 | */ | |
311 | Dygraph.prototype.xAxisRange = function() { | |
312 | if (this.dateWindow_) return this.dateWindow_; | |
313 | ||
314 | // The entire chart is visible. | |
315 | var left = this.rawData_[0][0]; | |
316 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
317 | return [left, right]; | |
318 | }; | |
319 | ||
3230c662 DV |
320 | /** |
321 | * Returns the currently-visible y-range. This can be affected by zooming, | |
322 | * panning or a call to updateOptions. | |
323 | * Returns a two-element array: [bottom, top]. | |
324 | */ | |
325 | Dygraph.prototype.yAxisRange = function() { | |
326 | return this.displayedYRange_; | |
327 | }; | |
328 | ||
329 | /** | |
330 | * Convert from data coordinates to canvas/div X/Y coordinates. | |
331 | * Returns a two-element array: [X, Y] | |
332 | */ | |
333 | Dygraph.prototype.toDomCoords = function(x, y) { | |
334 | var ret = [null, null]; | |
335 | var area = this.plotter_.area; | |
336 | if (x !== null) { | |
337 | var xRange = this.xAxisRange(); | |
338 | ret[0] = area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; | |
339 | } | |
340 | ||
341 | if (y !== null) { | |
342 | var yRange = this.yAxisRange(); | |
891ad846 | 343 | ret[1] = area.y + (yRange[1] - y) / (yRange[1] - yRange[0]) * area.h; |
3230c662 DV |
344 | } |
345 | ||
346 | return ret; | |
347 | }; | |
348 | ||
56623f3b | 349 | // TODO(danvk): use these functions throughout dygraphs. |
3230c662 DV |
350 | /** |
351 | * Convert from canvas/div coords to data coordinates. | |
352 | * Returns a two-element array: [X, Y] | |
353 | */ | |
354 | Dygraph.prototype.toDataCoords = function(x, y) { | |
355 | var ret = [null, null]; | |
356 | var area = this.plotter_.area; | |
357 | if (x !== null) { | |
358 | var xRange = this.xAxisRange(); | |
359 | ret[0] = xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); | |
360 | } | |
361 | ||
362 | if (y !== null) { | |
363 | var yRange = this.yAxisRange(); | |
364 | ret[1] = yRange[0] + (area.h - y) / area.h * (yRange[1] - yRange[0]); | |
365 | } | |
366 | ||
367 | return ret; | |
368 | }; | |
369 | ||
e99fde05 DV |
370 | /** |
371 | * Returns the number of columns (including the independent variable). | |
372 | */ | |
373 | Dygraph.prototype.numColumns = function() { | |
374 | return this.rawData_[0].length; | |
375 | }; | |
376 | ||
377 | /** | |
378 | * Returns the number of rows (excluding any header/label row). | |
379 | */ | |
380 | Dygraph.prototype.numRows = function() { | |
381 | return this.rawData_.length; | |
382 | }; | |
383 | ||
384 | /** | |
385 | * Returns the value in the given row and column. If the row and column exceed | |
386 | * the bounds on the data, returns null. Also returns null if the value is | |
387 | * missing. | |
388 | */ | |
389 | Dygraph.prototype.getValue = function(row, col) { | |
390 | if (row < 0 || row > this.rawData_.length) return null; | |
391 | if (col < 0 || col > this.rawData_[row].length) return null; | |
392 | ||
393 | return this.rawData_[row][col]; | |
394 | }; | |
395 | ||
76171648 DV |
396 | Dygraph.addEvent = function(el, evt, fn) { |
397 | var normed_fn = function(e) { | |
398 | if (!e) var e = window.event; | |
399 | fn(e); | |
400 | }; | |
401 | if (window.addEventListener) { // Mozilla, Netscape, Firefox | |
402 | el.addEventListener(evt, normed_fn, false); | |
403 | } else { // IE | |
404 | el.attachEvent('on' + evt, normed_fn); | |
405 | } | |
406 | }; | |
6a1aa64f | 407 | |
4c47502d DV |
408 | Dygraph.clipCanvas_ = function(cnv, clip) { |
409 | var ctx = cnv.getContext("2d"); | |
410 | ctx.beginPath(); | |
411 | ctx.rect(clip.left, clip.top, clip.width, clip.height); | |
412 | ctx.clip(); | |
413 | }; | |
414 | ||
6a1aa64f | 415 | /** |
285a6bda | 416 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 417 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 418 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
419 | * @private |
420 | */ | |
285a6bda | 421 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
422 | // Create the all-enclosing graph div |
423 | var enclosing = this.maindiv_; | |
424 | ||
b0c3b730 DV |
425 | this.graphDiv = document.createElement("div"); |
426 | this.graphDiv.style.width = this.width_ + "px"; | |
427 | this.graphDiv.style.height = this.height_ + "px"; | |
428 | enclosing.appendChild(this.graphDiv); | |
429 | ||
4c47502d DV |
430 | var clip = { |
431 | top: 0, | |
432 | left: this.attr_("yAxisLabelWidth") + 2 * this.attr_("axisTickSize") | |
433 | }; | |
434 | clip.width = this.width_ - clip.left - this.attr_("rightGap"); | |
435 | clip.height = this.height_ - this.attr_("axisLabelFontSize") | |
436 | - 2 * this.attr_("axisTickSize"); | |
437 | this.clippingArea_ = clip; | |
438 | ||
b0c3b730 | 439 | // Create the canvas for interactive parts of the chart. |
f8cfec73 | 440 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 DV |
441 | this.canvas_.style.position = "absolute"; |
442 | this.canvas_.width = this.width_; | |
443 | this.canvas_.height = this.height_; | |
f8cfec73 DV |
444 | this.canvas_.style.width = this.width_ + "px"; // for IE |
445 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
b0c3b730 DV |
446 | |
447 | // ... and for static parts of the chart. | |
6a1aa64f | 448 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
76171648 | 449 | |
eb7bf005 EC |
450 | // The interactive parts of the graph are drawn on top of the chart. |
451 | this.graphDiv.appendChild(this.hidden_); | |
452 | this.graphDiv.appendChild(this.canvas_); | |
453 | this.mouseEventElement_ = this.canvas_; | |
454 | ||
4c47502d DV |
455 | // Make sure we don't overdraw. |
456 | Dygraph.clipCanvas_(this.hidden_, this.clippingArea_); | |
457 | Dygraph.clipCanvas_(this.canvas_, this.clippingArea_); | |
458 | ||
76171648 | 459 | var dygraph = this; |
eb7bf005 | 460 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(e) { |
76171648 DV |
461 | dygraph.mouseMove_(e); |
462 | }); | |
eb7bf005 | 463 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(e) { |
76171648 DV |
464 | dygraph.mouseOut_(e); |
465 | }); | |
697e70b2 DV |
466 | |
467 | // Create the grapher | |
468 | // TODO(danvk): why does the Layout need its own set of options? | |
469 | this.layoutOptions_ = { 'xOriginIsZero': false }; | |
470 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
471 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
472 | Dygraph.update(this.layoutOptions_, { | |
473 | 'errorBars': (this.attr_("errorBars") || this.attr_("customBars")) }); | |
474 | ||
475 | this.layout_ = new DygraphLayout(this, this.layoutOptions_); | |
476 | ||
477 | // TODO(danvk): why does the Renderer need its own set of options? | |
478 | this.renderOptions_ = { colorScheme: this.colors_, | |
479 | strokeColor: null, | |
480 | axisLineWidth: Dygraph.AXIS_LINE_WIDTH }; | |
481 | Dygraph.update(this.renderOptions_, this.attrs_); | |
482 | Dygraph.update(this.renderOptions_, this.user_attrs_); | |
483 | this.plotter_ = new DygraphCanvasRenderer(this, | |
484 | this.hidden_, this.layout_, | |
485 | this.renderOptions_); | |
486 | ||
487 | this.createStatusMessage_(); | |
488 | this.createRollInterface_(); | |
489 | this.createDragInterface_(); | |
4cfcc38c DV |
490 | }; |
491 | ||
492 | /** | |
493 | * Detach DOM elements in the dygraph and null out all data references. | |
494 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
495 | * usage. See, e.g., the tests/perf.html example. | |
496 | */ | |
497 | Dygraph.prototype.destroy = function() { | |
498 | var removeRecursive = function(node) { | |
499 | while (node.hasChildNodes()) { | |
500 | removeRecursive(node.firstChild); | |
501 | node.removeChild(node.firstChild); | |
502 | } | |
503 | }; | |
504 | removeRecursive(this.maindiv_); | |
505 | ||
506 | var nullOut = function(obj) { | |
507 | for (var n in obj) { | |
508 | if (typeof(obj[n]) === 'object') { | |
509 | obj[n] = null; | |
510 | } | |
511 | } | |
512 | }; | |
513 | ||
514 | // These may not all be necessary, but it can't hurt... | |
515 | nullOut(this.layout_); | |
516 | nullOut(this.plotter_); | |
517 | nullOut(this); | |
518 | }; | |
6a1aa64f DV |
519 | |
520 | /** | |
521 | * Creates the canvas containing the PlotKit graph. Only plotkit ever draws on | |
285a6bda | 522 | * this particular canvas. All Dygraph work is done on this.canvas_. |
8846615a | 523 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
524 | * @return {Object} The newly-created canvas |
525 | * @private | |
526 | */ | |
285a6bda | 527 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 | 528 | var h = Dygraph.createCanvas(); |
6a1aa64f | 529 | h.style.position = "absolute"; |
9ac5e4ae DV |
530 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
531 | // some extra area to make it easier to zoom in on the far left and far | |
532 | // right. h needs to be precisely the plot area, so that clipping occurs. | |
6a1aa64f DV |
533 | h.style.top = canvas.style.top; |
534 | h.style.left = canvas.style.left; | |
535 | h.width = this.width_; | |
536 | h.height = this.height_; | |
f8cfec73 DV |
537 | h.style.width = this.width_ + "px"; // for IE |
538 | h.style.height = this.height_ + "px"; // for IE | |
6a1aa64f DV |
539 | return h; |
540 | }; | |
541 | ||
f474c2a3 DV |
542 | // Taken from MochiKit.Color |
543 | Dygraph.hsvToRGB = function (hue, saturation, value) { | |
544 | var red; | |
545 | var green; | |
546 | var blue; | |
547 | if (saturation === 0) { | |
548 | red = value; | |
549 | green = value; | |
550 | blue = value; | |
551 | } else { | |
552 | var i = Math.floor(hue * 6); | |
553 | var f = (hue * 6) - i; | |
554 | var p = value * (1 - saturation); | |
555 | var q = value * (1 - (saturation * f)); | |
556 | var t = value * (1 - (saturation * (1 - f))); | |
557 | switch (i) { | |
558 | case 1: red = q; green = value; blue = p; break; | |
559 | case 2: red = p; green = value; blue = t; break; | |
560 | case 3: red = p; green = q; blue = value; break; | |
561 | case 4: red = t; green = p; blue = value; break; | |
562 | case 5: red = value; green = p; blue = q; break; | |
563 | case 6: // fall through | |
564 | case 0: red = value; green = t; blue = p; break; | |
565 | } | |
566 | } | |
567 | red = Math.floor(255 * red + 0.5); | |
568 | green = Math.floor(255 * green + 0.5); | |
569 | blue = Math.floor(255 * blue + 0.5); | |
570 | return 'rgb(' + red + ',' + green + ',' + blue + ')'; | |
571 | }; | |
572 | ||
573 | ||
6a1aa64f DV |
574 | /** |
575 | * Generate a set of distinct colors for the data series. This is done with a | |
576 | * color wheel. Saturation/Value are customizable, and the hue is | |
577 | * equally-spaced around the color wheel. If a custom set of colors is | |
578 | * specified, that is used instead. | |
6a1aa64f DV |
579 | * @private |
580 | */ | |
285a6bda DV |
581 | Dygraph.prototype.setColors_ = function() { |
582 | // TODO(danvk): compute this directly into this.attrs_['colorScheme'] and do | |
583 | // away with this.renderOptions_. | |
584 | var num = this.attr_("labels").length - 1; | |
6a1aa64f | 585 | this.colors_ = []; |
285a6bda DV |
586 | var colors = this.attr_('colors'); |
587 | if (!colors) { | |
588 | var sat = this.attr_('colorSaturation') || 1.0; | |
589 | var val = this.attr_('colorValue') || 0.5; | |
2aa21213 | 590 | var half = Math.ceil(num / 2); |
6a1aa64f | 591 | for (var i = 1; i <= num; i++) { |
ec1959eb | 592 | if (!this.visibility()[i-1]) continue; |
43af96e7 | 593 | // alternate colors for high contrast. |
2aa21213 | 594 | var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2); |
43af96e7 NK |
595 | var hue = (1.0 * idx/ (1 + num)); |
596 | this.colors_.push(Dygraph.hsvToRGB(hue, sat, val)); | |
6a1aa64f DV |
597 | } |
598 | } else { | |
599 | for (var i = 0; i < num; i++) { | |
ec1959eb | 600 | if (!this.visibility()[i]) continue; |
285a6bda | 601 | var colorStr = colors[i % colors.length]; |
f474c2a3 | 602 | this.colors_.push(colorStr); |
6a1aa64f DV |
603 | } |
604 | } | |
285a6bda | 605 | |
c21d2c2d | 606 | // TODO(danvk): update this w/r/t/ the new options system. |
285a6bda | 607 | this.renderOptions_.colorScheme = this.colors_; |
fc80a396 DV |
608 | Dygraph.update(this.plotter_.options, this.renderOptions_); |
609 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
610 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
6a1aa64f DV |
611 | } |
612 | ||
43af96e7 NK |
613 | /** |
614 | * Return the list of colors. This is either the list of colors passed in the | |
615 | * attributes, or the autogenerated list of rgb(r,g,b) strings. | |
616 | * @return {Array<string>} The list of colors. | |
617 | */ | |
618 | Dygraph.prototype.getColors = function() { | |
619 | return this.colors_; | |
620 | }; | |
621 | ||
5e60386d DV |
622 | // The following functions are from quirksmode.org with a modification for Safari from |
623 | // http://blog.firetree.net/2005/07/04/javascript-find-position/ | |
3df0ccf0 DV |
624 | // http://www.quirksmode.org/js/findpos.html |
625 | Dygraph.findPosX = function(obj) { | |
626 | var curleft = 0; | |
5e60386d | 627 | if(obj.offsetParent) |
50360fd0 | 628 | while(1) |
5e60386d | 629 | { |
3df0ccf0 | 630 | curleft += obj.offsetLeft; |
5e60386d DV |
631 | if(!obj.offsetParent) |
632 | break; | |
3df0ccf0 DV |
633 | obj = obj.offsetParent; |
634 | } | |
5e60386d | 635 | else if(obj.x) |
3df0ccf0 DV |
636 | curleft += obj.x; |
637 | return curleft; | |
638 | }; | |
c21d2c2d | 639 | |
3df0ccf0 DV |
640 | Dygraph.findPosY = function(obj) { |
641 | var curtop = 0; | |
5e60386d DV |
642 | if(obj.offsetParent) |
643 | while(1) | |
644 | { | |
3df0ccf0 | 645 | curtop += obj.offsetTop; |
5e60386d DV |
646 | if(!obj.offsetParent) |
647 | break; | |
3df0ccf0 DV |
648 | obj = obj.offsetParent; |
649 | } | |
5e60386d | 650 | else if(obj.y) |
3df0ccf0 DV |
651 | curtop += obj.y; |
652 | return curtop; | |
653 | }; | |
654 | ||
5e60386d | 655 | |
71a11a8e | 656 | |
6a1aa64f DV |
657 | /** |
658 | * Create the div that contains information on the selected point(s) | |
659 | * This goes in the top right of the canvas, unless an external div has already | |
660 | * been specified. | |
661 | * @private | |
662 | */ | |
fedbd797 | 663 | Dygraph.prototype.createStatusMessage_ = function() { |
664 | var userLabelsDiv = this.user_attrs_["labelsDiv"]; | |
665 | if (userLabelsDiv && null != userLabelsDiv | |
666 | && (typeof(userLabelsDiv) == "string" || userLabelsDiv instanceof String)) { | |
667 | this.user_attrs_["labelsDiv"] = document.getElementById(userLabelsDiv); | |
668 | } | |
285a6bda DV |
669 | if (!this.attr_("labelsDiv")) { |
670 | var divWidth = this.attr_('labelsDivWidth'); | |
b0c3b730 | 671 | var messagestyle = { |
6a1aa64f DV |
672 | "position": "absolute", |
673 | "fontSize": "14px", | |
674 | "zIndex": 10, | |
675 | "width": divWidth + "px", | |
676 | "top": "0px", | |
8846615a | 677 | "left": (this.width_ - divWidth - 2) + "px", |
6a1aa64f DV |
678 | "background": "white", |
679 | "textAlign": "left", | |
b0c3b730 | 680 | "overflow": "hidden"}; |
fc80a396 | 681 | Dygraph.update(messagestyle, this.attr_('labelsDivStyles')); |
b0c3b730 DV |
682 | var div = document.createElement("div"); |
683 | for (var name in messagestyle) { | |
85b99f0b DV |
684 | if (messagestyle.hasOwnProperty(name)) { |
685 | div.style[name] = messagestyle[name]; | |
686 | } | |
b0c3b730 DV |
687 | } |
688 | this.graphDiv.appendChild(div); | |
285a6bda | 689 | this.attrs_.labelsDiv = div; |
6a1aa64f DV |
690 | } |
691 | }; | |
692 | ||
693 | /** | |
694 | * Create the text box to adjust the averaging period | |
695 | * @return {Object} The newly-created text box | |
696 | * @private | |
697 | */ | |
285a6bda | 698 | Dygraph.prototype.createRollInterface_ = function() { |
285a6bda | 699 | var display = this.attr_('showRoller') ? "block" : "none"; |
b0c3b730 DV |
700 | var textAttr = { "position": "absolute", |
701 | "zIndex": 10, | |
702 | "top": (this.plotter_.area.h - 25) + "px", | |
703 | "left": (this.plotter_.area.x + 1) + "px", | |
704 | "display": display | |
6a1aa64f | 705 | }; |
b0c3b730 DV |
706 | var roller = document.createElement("input"); |
707 | roller.type = "text"; | |
708 | roller.size = "2"; | |
709 | roller.value = this.rollPeriod_; | |
710 | for (var name in textAttr) { | |
85b99f0b DV |
711 | if (textAttr.hasOwnProperty(name)) { |
712 | roller.style[name] = textAttr[name]; | |
713 | } | |
b0c3b730 DV |
714 | } |
715 | ||
6a1aa64f | 716 | var pa = this.graphDiv; |
b0c3b730 | 717 | pa.appendChild(roller); |
76171648 DV |
718 | var dygraph = this; |
719 | roller.onchange = function() { dygraph.adjustRoll(roller.value); }; | |
6a1aa64f | 720 | return roller; |
76171648 DV |
721 | }; |
722 | ||
723 | // These functions are taken from MochiKit.Signal | |
724 | Dygraph.pageX = function(e) { | |
725 | if (e.pageX) { | |
726 | return (!e.pageX || e.pageX < 0) ? 0 : e.pageX; | |
727 | } else { | |
728 | var de = document; | |
729 | var b = document.body; | |
730 | return e.clientX + | |
731 | (de.scrollLeft || b.scrollLeft) - | |
732 | (de.clientLeft || 0); | |
733 | } | |
734 | }; | |
735 | ||
736 | Dygraph.pageY = function(e) { | |
737 | if (e.pageY) { | |
738 | return (!e.pageY || e.pageY < 0) ? 0 : e.pageY; | |
739 | } else { | |
740 | var de = document; | |
741 | var b = document.body; | |
742 | return e.clientY + | |
743 | (de.scrollTop || b.scrollTop) - | |
744 | (de.clientTop || 0); | |
745 | } | |
746 | }; | |
6a1aa64f DV |
747 | |
748 | /** | |
749 | * Set up all the mouse handlers needed to capture dragging behavior for zoom | |
27385109 | 750 | * events. |
6a1aa64f DV |
751 | * @private |
752 | */ | |
285a6bda | 753 | Dygraph.prototype.createDragInterface_ = function() { |
6a1aa64f DV |
754 | var self = this; |
755 | ||
756 | // Tracks whether the mouse is down right now | |
bce01b0f | 757 | var isZooming = false; |
c776c216 | 758 | var isPanning = false; |
6a1aa64f DV |
759 | var dragStartX = null; |
760 | var dragStartY = null; | |
761 | var dragEndX = null; | |
762 | var dragEndY = null; | |
eeab5025 | 763 | var dragDirection = null; |
6a1aa64f | 764 | var prevEndX = null; |
8b83c6cc RK |
765 | var prevEndY = null; |
766 | var prevDragDirection = null; | |
e3489f4f RK |
767 | |
768 | // draggingDate and draggingValue represent the [date,value] point on the | |
769 | // graph at which the mouse was pressed. As the mouse moves while panning, | |
770 | // the viewport must pan so that the mouse position points to | |
771 | // [draggingDate, draggingValue] | |
bce01b0f | 772 | var draggingDate = null; |
e3489f4f RK |
773 | var draggingValue = null; |
774 | ||
775 | // The range in second/value units that the viewport encompasses during a | |
776 | // panning operation. | |
bce01b0f | 777 | var dateRange = null; |
e3489f4f | 778 | var valueRange = null; |
6a1aa64f DV |
779 | |
780 | // Utility function to convert page-wide coordinates to canvas coords | |
67e650dc DV |
781 | var px = 0; |
782 | var py = 0; | |
76171648 | 783 | var getX = function(e) { return Dygraph.pageX(e) - px }; |
1e1bf7df | 784 | var getY = function(e) { return Dygraph.pageY(e) - py }; |
6a1aa64f DV |
785 | |
786 | // Draw zoom rectangles when the mouse is down and the user moves around | |
eb7bf005 | 787 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(event) { |
bce01b0f | 788 | if (isZooming) { |
6a1aa64f DV |
789 | dragEndX = getX(event); |
790 | dragEndY = getY(event); | |
791 | ||
8b83c6cc RK |
792 | var xDelta = Math.abs(dragStartX - dragEndX); |
793 | var yDelta = Math.abs(dragStartY - dragEndY); | |
8b211dd6 RK |
794 | |
795 | // drag direction threshold for y axis is twice as large as x axis | |
eeab5025 | 796 | dragDirection = (xDelta < yDelta / 2) ? Dygraph.VERTICAL : Dygraph.HORIZONTAL; |
8b83c6cc RK |
797 | |
798 | self.drawZoomRect_(dragDirection, dragStartX, dragEndX, dragStartY, dragEndY, | |
799 | prevDragDirection, prevEndX, prevEndY); | |
800 | ||
6a1aa64f | 801 | prevEndX = dragEndX; |
8b83c6cc RK |
802 | prevEndY = dragEndY; |
803 | prevDragDirection = dragDirection; | |
bce01b0f DV |
804 | } else if (isPanning) { |
805 | dragEndX = getX(event); | |
806 | dragEndY = getY(event); | |
807 | ||
808 | // Want to have it so that: | |
e3489f4f | 809 | // 1. draggingDate appears at dragEndX, draggingValue appears at dragEndY. |
bce01b0f | 810 | // 2. daterange = (dateWindow_[1] - dateWindow_[0]) is unaltered. |
e3489f4f RK |
811 | // 3. draggingValue appears at dragEndY. |
812 | // 4. valueRange is unaltered. | |
813 | ||
814 | var minDate = draggingDate - (dragEndX / self.width_) * dateRange; | |
815 | var maxDate = minDate + dateRange; | |
816 | self.dateWindow_ = [minDate, maxDate]; | |
bce01b0f | 817 | |
ef0b205b | 818 | |
64ae9ab8 RK |
819 | // y-axis scaling is automatic unless a valueRange is defined or |
820 | // if the user zooms in on the y-axis. If neither is true, valueWindow_ | |
ef0b205b | 821 | // will be null. |
74f09e22 RK |
822 | if (self.valueWindow_) { |
823 | var maxValue = draggingValue + (dragEndY / self.height_) * valueRange; | |
824 | var minValue = maxValue - valueRange; | |
825 | self.valueWindow_ = [ minValue, maxValue ]; | |
826 | } | |
bce01b0f | 827 | self.drawGraph_(self.rawData_); |
6a1aa64f DV |
828 | } |
829 | }); | |
830 | ||
831 | // Track the beginning of drag events | |
eb7bf005 | 832 | Dygraph.addEvent(this.mouseEventElement_, 'mousedown', function(event) { |
3df0ccf0 DV |
833 | px = Dygraph.findPosX(self.canvas_); |
834 | py = Dygraph.findPosY(self.canvas_); | |
6a1aa64f DV |
835 | dragStartX = getX(event); |
836 | dragStartY = getY(event); | |
bce01b0f | 837 | |
2dab69c3 | 838 | if (event.altKey || event.shiftKey) { |
e3489f4f | 839 | // have to be zoomed in to pan. |
313d2805 | 840 | if (!self.dateWindow_ && !self.valueWindow_) return; |
e3489f4f | 841 | |
bce01b0f | 842 | isPanning = true; |
e3489f4f RK |
843 | var xRange = self.xAxisRange(); |
844 | dateRange = xRange[1] - xRange[0]; | |
845 | var yRange = self.yAxisRange(); | |
846 | valueRange = yRange[1] - yRange[0]; | |
847 | ||
848 | // TODO(konigsberg): Switch from all this math to toDataCoords? | |
849 | // Seems to work for the dragging value. | |
d12999d3 | 850 | draggingDate = (dragStartX / self.width_) * dateRange + |
e3489f4f RK |
851 | xRange[0]; |
852 | var r = self.toDataCoords(null, dragStartY); | |
853 | draggingValue = r[1]; | |
bce01b0f DV |
854 | } else { |
855 | isZooming = true; | |
856 | } | |
6a1aa64f DV |
857 | }); |
858 | ||
859 | // If the user releases the mouse button during a drag, but not over the | |
860 | // canvas, then it doesn't count as a zooming action. | |
76171648 | 861 | Dygraph.addEvent(document, 'mouseup', function(event) { |
bce01b0f DV |
862 | if (isZooming || isPanning) { |
863 | isZooming = false; | |
6a1aa64f DV |
864 | dragStartX = null; |
865 | dragStartY = null; | |
866 | } | |
bce01b0f DV |
867 | |
868 | if (isPanning) { | |
869 | isPanning = false; | |
870 | draggingDate = null; | |
e3489f4f | 871 | draggingValue = null; |
bce01b0f | 872 | dateRange = null; |
e3489f4f | 873 | valueRange = null; |
bce01b0f | 874 | } |
6a1aa64f DV |
875 | }); |
876 | ||
877 | // Temporarily cancel the dragging event when the mouse leaves the graph | |
eb7bf005 | 878 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(event) { |
bce01b0f | 879 | if (isZooming) { |
6a1aa64f DV |
880 | dragEndX = null; |
881 | dragEndY = null; | |
882 | } | |
883 | }); | |
884 | ||
885 | // If the mouse is released on the canvas during a drag event, then it's a | |
886 | // zoom. Only do the zoom if it's over a large enough area (>= 10 pixels) | |
eb7bf005 | 887 | Dygraph.addEvent(this.mouseEventElement_, 'mouseup', function(event) { |
bce01b0f DV |
888 | if (isZooming) { |
889 | isZooming = false; | |
6a1aa64f DV |
890 | dragEndX = getX(event); |
891 | dragEndY = getY(event); | |
892 | var regionWidth = Math.abs(dragEndX - dragStartX); | |
893 | var regionHeight = Math.abs(dragEndY - dragStartY); | |
894 | ||
e2b5f2bc DV |
895 | if (regionWidth < 2 && regionHeight < 2 && |
896 | self.lastx_ != undefined && self.lastx_ != -1) { | |
2ad87eaa | 897 | // TODO(danvk): pass along more info about the points, e.g. 'x' |
1e1bf7df | 898 | if (self.attr_('clickCallback') != null) { |
1e1bf7df DV |
899 | self.attr_('clickCallback')(event, self.lastx_, self.selPoints_); |
900 | } | |
901 | if (self.attr_('pointClickCallback')) { | |
902 | // check if the click was on a particular point. | |
903 | var closestIdx = -1; | |
904 | var closestDistance = 0; | |
905 | for (var i = 0; i < self.selPoints_.length; i++) { | |
906 | var p = self.selPoints_[i]; | |
907 | var distance = Math.pow(p.canvasx - dragEndX, 2) + | |
908 | Math.pow(p.canvasy - dragEndY, 2); | |
909 | if (closestIdx == -1 || distance < closestDistance) { | |
910 | closestDistance = distance; | |
911 | closestIdx = i; | |
912 | } | |
913 | } | |
914 | ||
915 | // Allow any click within two pixels of the dot. | |
2ad87eaa | 916 | var radius = self.attr_('highlightCircleSize') + 2; |
1e1bf7df DV |
917 | if (closestDistance <= 5 * 5) { |
918 | self.attr_('pointClickCallback')(event, self.selPoints_[closestIdx]); | |
919 | } | |
920 | } | |
6a1aa64f DV |
921 | } |
922 | ||
eeab5025 | 923 | if (regionWidth >= 10 && dragDirection == Dygraph.HORIZONTAL) { |
8b83c6cc | 924 | self.doZoomX_(Math.min(dragStartX, dragEndX), |
6a1aa64f | 925 | Math.max(dragStartX, dragEndX)); |
eeab5025 | 926 | } else if (regionHeight >= 10 && dragDirection == Dygraph.VERTICAL){ |
8b83c6cc RK |
927 | self.doZoomY_(Math.min(dragStartY, dragEndY), |
928 | Math.max(dragStartY, dragEndY)); | |
6a1aa64f DV |
929 | } else { |
930 | self.canvas_.getContext("2d").clearRect(0, 0, | |
931 | self.canvas_.width, | |
932 | self.canvas_.height); | |
933 | } | |
934 | ||
935 | dragStartX = null; | |
936 | dragStartY = null; | |
937 | } | |
bce01b0f DV |
938 | |
939 | if (isPanning) { | |
940 | isPanning = false; | |
941 | draggingDate = null; | |
e3489f4f | 942 | draggingValue = null; |
bce01b0f | 943 | dateRange = null; |
e3489f4f | 944 | valueRange = null; |
bce01b0f | 945 | } |
6a1aa64f DV |
946 | }); |
947 | ||
948 | // Double-clicking zooms back out | |
eb7bf005 | 949 | Dygraph.addEvent(this.mouseEventElement_, 'dblclick', function(event) { |
8b83c6cc RK |
950 | // Disable zooming out if panning. |
951 | if (event.altKey || event.shiftKey) return; | |
952 | ||
953 | self.doUnzoom_(); | |
6a1aa64f DV |
954 | }); |
955 | }; | |
956 | ||
957 | /** | |
958 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
959 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
960 | * avoid extra redrawing, but it's tricky to avoid interactions with the status | |
961 | * dots. | |
8b83c6cc | 962 | * |
39b0e098 RK |
963 | * @param {Number} direction the direction of the zoom rectangle. Acceptable |
964 | * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL. | |
6a1aa64f DV |
965 | * @param {Number} startX The X position where the drag started, in canvas |
966 | * coordinates. | |
967 | * @param {Number} endX The current X position of the drag, in canvas coords. | |
8b83c6cc RK |
968 | * @param {Number} startY The Y position where the drag started, in canvas |
969 | * coordinates. | |
970 | * @param {Number} endY The current Y position of the drag, in canvas coords. | |
39b0e098 | 971 | * @param {Number} prevDirection the value of direction on the previous call to |
8b83c6cc | 972 | * this function. Used to avoid excess redrawing |
6a1aa64f DV |
973 | * @param {Number} prevEndX The value of endX on the previous call to this |
974 | * function. Used to avoid excess redrawing | |
8b83c6cc RK |
975 | * @param {Number} prevEndY The value of endY on the previous call to this |
976 | * function. Used to avoid excess redrawing | |
6a1aa64f DV |
977 | * @private |
978 | */ | |
8b83c6cc RK |
979 | Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY, endY, |
980 | prevDirection, prevEndX, prevEndY) { | |
6a1aa64f DV |
981 | var ctx = this.canvas_.getContext("2d"); |
982 | ||
983 | // Clean up from the previous rect if necessary | |
39b0e098 | 984 | if (prevDirection == Dygraph.HORIZONTAL) { |
6a1aa64f DV |
985 | ctx.clearRect(Math.min(startX, prevEndX), 0, |
986 | Math.abs(startX - prevEndX), this.height_); | |
39b0e098 | 987 | } else if (prevDirection == Dygraph.VERTICAL){ |
8b83c6cc RK |
988 | ctx.clearRect(0, Math.min(startY, prevEndY), |
989 | this.width_, Math.abs(startY - prevEndY)); | |
6a1aa64f DV |
990 | } |
991 | ||
992 | // Draw a light-grey rectangle to show the new viewing area | |
39b0e098 | 993 | if (direction == Dygraph.HORIZONTAL) { |
8b83c6cc RK |
994 | if (endX && startX) { |
995 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
996 | ctx.fillRect(Math.min(startX, endX), 0, | |
997 | Math.abs(endX - startX), this.height_); | |
998 | } | |
999 | } | |
39b0e098 | 1000 | if (direction == Dygraph.VERTICAL) { |
8b83c6cc RK |
1001 | if (endY && startY) { |
1002 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
1003 | ctx.fillRect(0, Math.min(startY, endY), | |
1004 | this.width_, Math.abs(endY - startY)); | |
1005 | } | |
6a1aa64f DV |
1006 | } |
1007 | }; | |
1008 | ||
1009 | /** | |
8b83c6cc RK |
1010 | * Zoom to something containing [lowX, highX]. These are pixel coordinates in |
1011 | * the canvas. The exact zoom window may be slightly larger if there are no data | |
1012 | * points near lowX or highX. Don't confuse this function with doZoomXDates, | |
1013 | * which accepts dates that match the raw data. This function redraws the graph. | |
1014 | * | |
6a1aa64f DV |
1015 | * @param {Number} lowX The leftmost pixel value that should be visible. |
1016 | * @param {Number} highX The rightmost pixel value that should be visible. | |
1017 | * @private | |
1018 | */ | |
8b83c6cc | 1019 | Dygraph.prototype.doZoomX_ = function(lowX, highX) { |
6a1aa64f | 1020 | // Find the earliest and latest dates contained in this canvasx range. |
8b83c6cc | 1021 | // Convert the call to date ranges of the raw data. |
56623f3b DV |
1022 | var r = this.toDataCoords(lowX, null); |
1023 | var minDate = r[0]; | |
1024 | r = this.toDataCoords(highX, null); | |
1025 | var maxDate = r[0]; | |
8b83c6cc RK |
1026 | this.doZoomXDates_(minDate, maxDate); |
1027 | }; | |
6a1aa64f | 1028 | |
8b83c6cc RK |
1029 | /** |
1030 | * Zoom to something containing [minDate, maxDate] values. Don't confuse this | |
1031 | * method with doZoomX which accepts pixel coordinates. This function redraws | |
1032 | * the graph. | |
1033 | * | |
1034 | * @param {Number} minDate The minimum date that should be visible. | |
1035 | * @param {Number} maxDate The maximum date that should be visible. | |
1036 | * @private | |
1037 | */ | |
1038 | Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) { | |
6a1aa64f DV |
1039 | this.dateWindow_ = [minDate, maxDate]; |
1040 | this.drawGraph_(this.rawData_); | |
285a6bda | 1041 | if (this.attr_("zoomCallback")) { |
8b83c6cc RK |
1042 | var yRange = this.yAxisRange(); |
1043 | this.attr_("zoomCallback")(minDate, maxDate, yRange[0], yRange[1]); | |
1044 | } | |
1045 | }; | |
1046 | ||
1047 | /** | |
1048 | * Zoom to something containing [lowY, highY]. These are pixel coordinates in | |
1049 | * the canvas. The exact zoom window may be slightly larger if there are no | |
1050 | * data points near lowY or highY. Don't confuse this function with | |
1051 | * doZoomYValues, which accepts parameters that match the raw data. This | |
1052 | * function redraws the graph. | |
1053 | * | |
1054 | * @param {Number} lowY The topmost pixel value that should be visible. | |
1055 | * @param {Number} highY The lowest pixel value that should be visible. | |
1056 | * @private | |
1057 | */ | |
1058 | Dygraph.prototype.doZoomY_ = function(lowY, highY) { | |
1059 | // Find the highest and lowest values in pixel range. | |
1060 | var r = this.toDataCoords(null, lowY); | |
8b83c6cc | 1061 | var maxValue = r[1]; |
937029df RK |
1062 | r = this.toDataCoords(null, highY); |
1063 | var minValue = r[1]; | |
8b83c6cc RK |
1064 | |
1065 | this.doZoomYValues_(minValue, maxValue); | |
1066 | }; | |
1067 | ||
1068 | /** | |
1069 | * Zoom to something containing [minValue, maxValue] values. Don't confuse this | |
1070 | * method with doZoomY which accepts pixel coordinates. This function redraws | |
1071 | * the graph. | |
1072 | * | |
1073 | * @param {Number} minValue The minimum Value that should be visible. | |
1074 | * @param {Number} maxValue The maximum value that should be visible. | |
1075 | * @private | |
1076 | */ | |
1077 | Dygraph.prototype.doZoomYValues_ = function(minValue, maxValue) { | |
937029df | 1078 | this.valueWindow_ = [minValue, maxValue]; |
8b83c6cc RK |
1079 | this.drawGraph_(this.rawData_); |
1080 | if (this.attr_("zoomCallback")) { | |
1081 | var xRange = this.xAxisRange(); | |
1082 | this.attr_("zoomCallback")(xRange[0], xRange[1], minValue, maxValue); | |
1083 | } | |
1084 | }; | |
1085 | ||
1086 | /** | |
1087 | * Reset the zoom to the original view coordinates. This is the same as | |
1088 | * double-clicking on the graph. | |
1089 | * | |
1090 | * @private | |
1091 | */ | |
1092 | Dygraph.prototype.doUnzoom_ = function() { | |
1093 | var dirty = null; | |
1094 | if (this.dateWindow_ != null) { | |
1095 | dirty = 1; | |
1096 | this.dateWindow_ = null; | |
1097 | } | |
1098 | if (this.valueWindow_ != null) { | |
1099 | dirty = 1; | |
1100 | this.valueWindow_ = this.valueRange_; | |
1101 | } | |
1102 | ||
1103 | if (dirty) { | |
437c0979 RK |
1104 | // Putting the drawing operation before the callback because it resets |
1105 | // yAxisRange. | |
1106 | this.drawGraph_(this.rawData_); | |
8b83c6cc RK |
1107 | if (this.attr_("zoomCallback")) { |
1108 | var minDate = this.rawData_[0][0]; | |
1109 | var maxDate = this.rawData_[this.rawData_.length - 1][0]; | |
a2db51b5 RK |
1110 | var minValue = this.yAxisRange()[0]; |
1111 | var maxValue = this.yAxisRange()[1]; | |
8b83c6cc RK |
1112 | this.attr_("zoomCallback")(minDate, maxDate, minValue, maxValue); |
1113 | } | |
67e650dc | 1114 | } |
6a1aa64f DV |
1115 | }; |
1116 | ||
1117 | /** | |
1118 | * When the mouse moves in the canvas, display information about a nearby data | |
1119 | * point and draw dots over those points in the data series. This function | |
1120 | * takes care of cleanup of previously-drawn dots. | |
1121 | * @param {Object} event The mousemove event from the browser. | |
1122 | * @private | |
1123 | */ | |
285a6bda | 1124 | Dygraph.prototype.mouseMove_ = function(event) { |
eb7bf005 | 1125 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_); |
6a1aa64f DV |
1126 | var points = this.layout_.points; |
1127 | ||
1128 | var lastx = -1; | |
1129 | var lasty = -1; | |
1130 | ||
1131 | // Loop through all the points and find the date nearest to our current | |
1132 | // location. | |
1133 | var minDist = 1e+100; | |
1134 | var idx = -1; | |
1135 | for (var i = 0; i < points.length; i++) { | |
8a7cc60e RK |
1136 | var point = points[i]; |
1137 | if (point == null) continue; | |
6a1aa64f | 1138 | var dist = Math.abs(points[i].canvasx - canvasx); |
f032c51d | 1139 | if (dist > minDist) continue; |
6a1aa64f DV |
1140 | minDist = dist; |
1141 | idx = i; | |
1142 | } | |
1143 | if (idx >= 0) lastx = points[idx].xval; | |
1144 | // Check that you can really highlight the last day's data | |
8a7cc60e RK |
1145 | var last = points[points.length-1]; |
1146 | if (last != null && canvasx > last.canvasx) | |
6a1aa64f DV |
1147 | lastx = points[points.length-1].xval; |
1148 | ||
1149 | // Extract the points we've selected | |
b258a3da | 1150 | this.selPoints_ = []; |
50360fd0 | 1151 | var l = points.length; |
416b05ad NK |
1152 | if (!this.attr_("stackedGraph")) { |
1153 | for (var i = 0; i < l; i++) { | |
1154 | if (points[i].xval == lastx) { | |
1155 | this.selPoints_.push(points[i]); | |
1156 | } | |
1157 | } | |
1158 | } else { | |
354e15ab DE |
1159 | // Need to 'unstack' points starting from the bottom |
1160 | var cumulative_sum = 0; | |
416b05ad NK |
1161 | for (var i = l - 1; i >= 0; i--) { |
1162 | if (points[i].xval == lastx) { | |
354e15ab | 1163 | var p = {}; // Clone the point since we modify it |
d4139cd8 NK |
1164 | for (var k in points[i]) { |
1165 | p[k] = points[i][k]; | |
50360fd0 NK |
1166 | } |
1167 | p.yval -= cumulative_sum; | |
1168 | cumulative_sum += p.yval; | |
d4139cd8 | 1169 | this.selPoints_.push(p); |
12e4c741 | 1170 | } |
6a1aa64f | 1171 | } |
354e15ab | 1172 | this.selPoints_.reverse(); |
6a1aa64f DV |
1173 | } |
1174 | ||
b258a3da | 1175 | if (this.attr_("highlightCallback")) { |
a4c6a67c | 1176 | var px = this.lastx_; |
dd082dda | 1177 | if (px !== null && lastx != px) { |
344ba8c0 | 1178 | // only fire if the selected point has changed. |
50360fd0 | 1179 | this.attr_("highlightCallback")(event, lastx, this.selPoints_); |
43af96e7 | 1180 | } |
12e4c741 | 1181 | } |
43af96e7 | 1182 | |
239c712d NAG |
1183 | // Save last x position for callbacks. |
1184 | this.lastx_ = lastx; | |
50360fd0 | 1185 | |
239c712d NAG |
1186 | this.updateSelection_(); |
1187 | }; | |
b258a3da | 1188 | |
239c712d NAG |
1189 | /** |
1190 | * Draw dots over the selectied points in the data series. This function | |
1191 | * takes care of cleanup of previously-drawn dots. | |
1192 | * @private | |
1193 | */ | |
1194 | Dygraph.prototype.updateSelection_ = function() { | |
6a1aa64f | 1195 | // Clear the previously drawn vertical, if there is one |
6a1aa64f DV |
1196 | var ctx = this.canvas_.getContext("2d"); |
1197 | if (this.previousVerticalX_ >= 0) { | |
46dde5f9 DV |
1198 | // Determine the maximum highlight circle size. |
1199 | var maxCircleSize = 0; | |
227b93cc DV |
1200 | var labels = this.attr_('labels'); |
1201 | for (var i = 1; i < labels.length; i++) { | |
1202 | var r = this.attr_('highlightCircleSize', labels[i]); | |
46dde5f9 DV |
1203 | if (r > maxCircleSize) maxCircleSize = r; |
1204 | } | |
6a1aa64f | 1205 | var px = this.previousVerticalX_; |
46dde5f9 DV |
1206 | ctx.clearRect(px - maxCircleSize - 1, 0, |
1207 | 2 * maxCircleSize + 2, this.height_); | |
6a1aa64f DV |
1208 | } |
1209 | ||
584ceeaa DV |
1210 | var isOK = function(x) { return x && !isNaN(x); }; |
1211 | ||
d160cc3b | 1212 | if (this.selPoints_.length > 0) { |
b258a3da | 1213 | var canvasx = this.selPoints_[0].canvasx; |
6a1aa64f DV |
1214 | |
1215 | // Set the status message to indicate the selected point(s) | |
239c712d | 1216 | var replace = this.attr_('xValueFormatter')(this.lastx_, this) + ":"; |
50360fd0 | 1217 | var fmtFunc = this.attr_('yValueFormatter'); |
6a1aa64f | 1218 | var clen = this.colors_.length; |
d160cc3b NK |
1219 | |
1220 | if (this.attr_('showLabelsOnHighlight')) { | |
1221 | // Set the status message to indicate the selected point(s) | |
d160cc3b | 1222 | for (var i = 0; i < this.selPoints_.length; i++) { |
129569a5 | 1223 | if (!this.attr_("labelsShowZeroValues") && this.selPoints_[i].yval == 0) continue; |
d160cc3b NK |
1224 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
1225 | if (this.attr_("labelsSeparateLines")) { | |
1226 | replace += "<br/>"; | |
1227 | } | |
1228 | var point = this.selPoints_[i]; | |
8fb6dc24 | 1229 | var c = new RGBColor(this.plotter_.colors[point.name]); |
029da4b6 | 1230 | var yval = fmtFunc(point.yval); |
d160cc3b NK |
1231 | replace += " <b><font color='" + c.toHex() + "'>" |
1232 | + point.name + "</font></b>:" | |
1233 | + yval; | |
6a1aa64f | 1234 | } |
50360fd0 | 1235 | |
d160cc3b | 1236 | this.attr_("labelsDiv").innerHTML = replace; |
6a1aa64f | 1237 | } |
6a1aa64f | 1238 | |
6a1aa64f | 1239 | // Draw colored circles over the center of each selected point |
43af96e7 | 1240 | ctx.save(); |
b258a3da | 1241 | for (var i = 0; i < this.selPoints_.length; i++) { |
f032c51d | 1242 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
227b93cc DV |
1243 | var circleSize = |
1244 | this.attr_('highlightCircleSize', this.selPoints_[i].name); | |
6a1aa64f | 1245 | ctx.beginPath(); |
563c70ca | 1246 | ctx.fillStyle = this.plotter_.colors[this.selPoints_[i].name]; |
f032c51d | 1247 | ctx.arc(canvasx, this.selPoints_[i].canvasy, circleSize, |
7bf6a9fe | 1248 | 0, 2 * Math.PI, false); |
6a1aa64f DV |
1249 | ctx.fill(); |
1250 | } | |
1251 | ctx.restore(); | |
1252 | ||
1253 | this.previousVerticalX_ = canvasx; | |
1254 | } | |
1255 | }; | |
1256 | ||
1257 | /** | |
239c712d NAG |
1258 | * Set manually set selected dots, and display information about them |
1259 | * @param int row number that should by highlighted | |
1260 | * false value clears the selection | |
1261 | * @public | |
1262 | */ | |
1263 | Dygraph.prototype.setSelection = function(row) { | |
1264 | // Extract the points we've selected | |
1265 | this.selPoints_ = []; | |
1266 | var pos = 0; | |
50360fd0 | 1267 | |
239c712d | 1268 | if (row !== false) { |
16269f6e NAG |
1269 | row = row-this.boundaryIds_[0][0]; |
1270 | } | |
50360fd0 | 1271 | |
16269f6e | 1272 | if (row !== false && row >= 0) { |
239c712d | 1273 | for (var i in this.layout_.datasets) { |
16269f6e | 1274 | if (row < this.layout_.datasets[i].length) { |
38f33a44 | 1275 | var point = this.layout_.points[pos+row]; |
1276 | ||
1277 | if (this.attr_("stackedGraph")) { | |
8c03ba63 | 1278 | point = this.layout_.unstackPointAtIndex(pos+row); |
38f33a44 | 1279 | } |
1280 | ||
1281 | this.selPoints_.push(point); | |
16269f6e | 1282 | } |
239c712d NAG |
1283 | pos += this.layout_.datasets[i].length; |
1284 | } | |
16269f6e | 1285 | } |
50360fd0 | 1286 | |
16269f6e | 1287 | if (this.selPoints_.length) { |
239c712d NAG |
1288 | this.lastx_ = this.selPoints_[0].xval; |
1289 | this.updateSelection_(); | |
1290 | } else { | |
1291 | this.lastx_ = -1; | |
1292 | this.clearSelection(); | |
1293 | } | |
1294 | ||
1295 | }; | |
1296 | ||
1297 | /** | |
6a1aa64f DV |
1298 | * The mouse has left the canvas. Clear out whatever artifacts remain |
1299 | * @param {Object} event the mouseout event from the browser. | |
1300 | * @private | |
1301 | */ | |
285a6bda | 1302 | Dygraph.prototype.mouseOut_ = function(event) { |
a4c6a67c AV |
1303 | if (this.attr_("unhighlightCallback")) { |
1304 | this.attr_("unhighlightCallback")(event); | |
1305 | } | |
1306 | ||
43af96e7 | 1307 | if (this.attr_("hideOverlayOnMouseOut")) { |
239c712d | 1308 | this.clearSelection(); |
43af96e7 | 1309 | } |
6a1aa64f DV |
1310 | }; |
1311 | ||
239c712d NAG |
1312 | /** |
1313 | * Remove all selection from the canvas | |
1314 | * @public | |
1315 | */ | |
1316 | Dygraph.prototype.clearSelection = function() { | |
1317 | // Get rid of the overlay data | |
1318 | var ctx = this.canvas_.getContext("2d"); | |
1319 | ctx.clearRect(0, 0, this.width_, this.height_); | |
1320 | this.attr_("labelsDiv").innerHTML = ""; | |
1321 | this.selPoints_ = []; | |
1322 | this.lastx_ = -1; | |
1323 | } | |
1324 | ||
103b7292 NAG |
1325 | /** |
1326 | * Returns the number of the currently selected row | |
1327 | * @return int row number, of -1 if nothing is selected | |
1328 | * @public | |
1329 | */ | |
1330 | Dygraph.prototype.getSelection = function() { | |
1331 | if (!this.selPoints_ || this.selPoints_.length < 1) { | |
1332 | return -1; | |
1333 | } | |
50360fd0 | 1334 | |
103b7292 NAG |
1335 | for (var row=0; row<this.layout_.points.length; row++ ) { |
1336 | if (this.layout_.points[row].x == this.selPoints_[0].x) { | |
16269f6e | 1337 | return row + this.boundaryIds_[0][0]; |
103b7292 NAG |
1338 | } |
1339 | } | |
1340 | return -1; | |
1341 | } | |
1342 | ||
285a6bda | 1343 | Dygraph.zeropad = function(x) { |
32988383 DV |
1344 | if (x < 10) return "0" + x; else return "" + x; |
1345 | } | |
1346 | ||
6a1aa64f | 1347 | /** |
6b8e33dd DV |
1348 | * Return a string version of the hours, minutes and seconds portion of a date. |
1349 | * @param {Number} date The JavaScript date (ms since epoch) | |
1350 | * @return {String} A time of the form "HH:MM:SS" | |
1351 | * @private | |
1352 | */ | |
bf640e56 | 1353 | Dygraph.hmsString_ = function(date) { |
285a6bda | 1354 | var zeropad = Dygraph.zeropad; |
6b8e33dd DV |
1355 | var d = new Date(date); |
1356 | if (d.getSeconds()) { | |
1357 | return zeropad(d.getHours()) + ":" + | |
1358 | zeropad(d.getMinutes()) + ":" + | |
1359 | zeropad(d.getSeconds()); | |
6b8e33dd | 1360 | } else { |
054531ca | 1361 | return zeropad(d.getHours()) + ":" + zeropad(d.getMinutes()); |
6b8e33dd DV |
1362 | } |
1363 | } | |
1364 | ||
1365 | /** | |
bf640e56 AV |
1366 | * Convert a JS date to a string appropriate to display on an axis that |
1367 | * is displaying values at the stated granularity. | |
1368 | * @param {Date} date The date to format | |
1369 | * @param {Number} granularity One of the Dygraph granularity constants | |
1370 | * @return {String} The formatted date | |
1371 | * @private | |
1372 | */ | |
1373 | Dygraph.dateAxisFormatter = function(date, granularity) { | |
1374 | if (granularity >= Dygraph.MONTHLY) { | |
1375 | return date.strftime('%b %y'); | |
1376 | } else { | |
31eddad3 | 1377 | var frac = date.getHours() * 3600 + date.getMinutes() * 60 + date.getSeconds() + date.getMilliseconds(); |
bf640e56 AV |
1378 | if (frac == 0 || granularity >= Dygraph.DAILY) { |
1379 | return new Date(date.getTime() + 3600*1000).strftime('%d%b'); | |
1380 | } else { | |
1381 | return Dygraph.hmsString_(date.getTime()); | |
1382 | } | |
1383 | } | |
1384 | } | |
1385 | ||
1386 | /** | |
6a1aa64f DV |
1387 | * Convert a JS date (millis since epoch) to YYYY/MM/DD |
1388 | * @param {Number} date The JavaScript date (ms since epoch) | |
1389 | * @return {String} A date of the form "YYYY/MM/DD" | |
1390 | * @private | |
1391 | */ | |
285a6bda DV |
1392 | Dygraph.dateString_ = function(date, self) { |
1393 | var zeropad = Dygraph.zeropad; | |
6a1aa64f DV |
1394 | var d = new Date(date); |
1395 | ||
1396 | // Get the year: | |
1397 | var year = "" + d.getFullYear(); | |
1398 | // Get a 0 padded month string | |
6b8e33dd | 1399 | var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh |
6a1aa64f | 1400 | // Get a 0 padded day string |
6b8e33dd | 1401 | var day = zeropad(d.getDate()); |
6a1aa64f | 1402 | |
6b8e33dd DV |
1403 | var ret = ""; |
1404 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); | |
bf640e56 | 1405 | if (frac) ret = " " + Dygraph.hmsString_(date); |
6b8e33dd DV |
1406 | |
1407 | return year + "/" + month + "/" + day + ret; | |
6a1aa64f DV |
1408 | }; |
1409 | ||
1410 | /** | |
1411 | * Round a number to the specified number of digits past the decimal point. | |
1412 | * @param {Number} num The number to round | |
1413 | * @param {Number} places The number of decimals to which to round | |
1414 | * @return {Number} The rounded number | |
1415 | * @private | |
1416 | */ | |
029da4b6 | 1417 | Dygraph.round_ = function(num, places) { |
6a1aa64f DV |
1418 | var shift = Math.pow(10, places); |
1419 | return Math.round(num * shift)/shift; | |
1420 | }; | |
1421 | ||
1422 | /** | |
1423 | * Fires when there's data available to be graphed. | |
1424 | * @param {String} data Raw CSV data to be plotted | |
1425 | * @private | |
1426 | */ | |
285a6bda | 1427 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f DV |
1428 | this.rawData_ = this.parseCSV_(data); |
1429 | this.drawGraph_(this.rawData_); | |
1430 | }; | |
1431 | ||
285a6bda | 1432 | Dygraph.prototype.months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", |
8846615a | 1433 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]; |
285a6bda | 1434 | Dygraph.prototype.quarters = ["Jan", "Apr", "Jul", "Oct"]; |
6a1aa64f DV |
1435 | |
1436 | /** | |
1437 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
1438 | * @private | |
1439 | */ | |
285a6bda | 1440 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f DV |
1441 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
1442 | var startDate, endDate; | |
1443 | if (this.dateWindow_) { | |
1444 | startDate = this.dateWindow_[0]; | |
1445 | endDate = this.dateWindow_[1]; | |
1446 | } else { | |
1447 | startDate = this.rawData_[0][0]; | |
1448 | endDate = this.rawData_[this.rawData_.length - 1][0]; | |
1449 | } | |
1450 | ||
285a6bda | 1451 | var xTicks = this.attr_('xTicker')(startDate, endDate, this); |
6a1aa64f | 1452 | this.layout_.updateOptions({xTicks: xTicks}); |
32988383 DV |
1453 | }; |
1454 | ||
1455 | // Time granularity enumeration | |
285a6bda | 1456 | Dygraph.SECONDLY = 0; |
20a41c17 DV |
1457 | Dygraph.TWO_SECONDLY = 1; |
1458 | Dygraph.FIVE_SECONDLY = 2; | |
1459 | Dygraph.TEN_SECONDLY = 3; | |
1460 | Dygraph.THIRTY_SECONDLY = 4; | |
1461 | Dygraph.MINUTELY = 5; | |
1462 | Dygraph.TWO_MINUTELY = 6; | |
1463 | Dygraph.FIVE_MINUTELY = 7; | |
1464 | Dygraph.TEN_MINUTELY = 8; | |
1465 | Dygraph.THIRTY_MINUTELY = 9; | |
1466 | Dygraph.HOURLY = 10; | |
1467 | Dygraph.TWO_HOURLY = 11; | |
1468 | Dygraph.SIX_HOURLY = 12; | |
1469 | Dygraph.DAILY = 13; | |
1470 | Dygraph.WEEKLY = 14; | |
1471 | Dygraph.MONTHLY = 15; | |
1472 | Dygraph.QUARTERLY = 16; | |
1473 | Dygraph.BIANNUAL = 17; | |
1474 | Dygraph.ANNUAL = 18; | |
1475 | Dygraph.DECADAL = 19; | |
1476 | Dygraph.NUM_GRANULARITIES = 20; | |
285a6bda DV |
1477 | |
1478 | Dygraph.SHORT_SPACINGS = []; | |
1479 | Dygraph.SHORT_SPACINGS[Dygraph.SECONDLY] = 1000 * 1; | |
20a41c17 DV |
1480 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_SECONDLY] = 1000 * 2; |
1481 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_SECONDLY] = 1000 * 5; | |
285a6bda DV |
1482 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_SECONDLY] = 1000 * 10; |
1483 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_SECONDLY] = 1000 * 30; | |
1484 | Dygraph.SHORT_SPACINGS[Dygraph.MINUTELY] = 1000 * 60; | |
20a41c17 DV |
1485 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_MINUTELY] = 1000 * 60 * 2; |
1486 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_MINUTELY] = 1000 * 60 * 5; | |
285a6bda DV |
1487 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_MINUTELY] = 1000 * 60 * 10; |
1488 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_MINUTELY] = 1000 * 60 * 30; | |
1489 | Dygraph.SHORT_SPACINGS[Dygraph.HOURLY] = 1000 * 3600; | |
20a41c17 | 1490 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_HOURLY] = 1000 * 3600 * 2; |
805d5519 | 1491 | Dygraph.SHORT_SPACINGS[Dygraph.SIX_HOURLY] = 1000 * 3600 * 6; |
285a6bda DV |
1492 | Dygraph.SHORT_SPACINGS[Dygraph.DAILY] = 1000 * 86400; |
1493 | Dygraph.SHORT_SPACINGS[Dygraph.WEEKLY] = 1000 * 604800; | |
32988383 DV |
1494 | |
1495 | // NumXTicks() | |
1496 | // | |
1497 | // If we used this time granularity, how many ticks would there be? | |
1498 | // This is only an approximation, but it's generally good enough. | |
1499 | // | |
285a6bda DV |
1500 | Dygraph.prototype.NumXTicks = function(start_time, end_time, granularity) { |
1501 | if (granularity < Dygraph.MONTHLY) { | |
32988383 | 1502 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1503 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
32988383 DV |
1504 | return Math.floor(0.5 + 1.0 * (end_time - start_time) / spacing); |
1505 | } else { | |
1506 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1507 | var num_months = 12; | |
285a6bda DV |
1508 | if (granularity == Dygraph.QUARTERLY) num_months = 3; |
1509 | if (granularity == Dygraph.BIANNUAL) num_months = 2; | |
1510 | if (granularity == Dygraph.ANNUAL) num_months = 1; | |
1511 | if (granularity == Dygraph.DECADAL) { num_months = 1; year_mod = 10; } | |
32988383 DV |
1512 | |
1513 | var msInYear = 365.2524 * 24 * 3600 * 1000; | |
1514 | var num_years = 1.0 * (end_time - start_time) / msInYear; | |
1515 | return Math.floor(0.5 + 1.0 * num_years * num_months / year_mod); | |
1516 | } | |
1517 | }; | |
1518 | ||
1519 | // GetXAxis() | |
1520 | // | |
1521 | // Construct an x-axis of nicely-formatted times on meaningful boundaries | |
1522 | // (e.g. 'Jan 09' rather than 'Jan 22, 2009'). | |
1523 | // | |
1524 | // Returns an array containing {v: millis, label: label} dictionaries. | |
1525 | // | |
285a6bda | 1526 | Dygraph.prototype.GetXAxis = function(start_time, end_time, granularity) { |
bf640e56 | 1527 | var formatter = this.attr_("xAxisLabelFormatter"); |
32988383 | 1528 | var ticks = []; |
285a6bda | 1529 | if (granularity < Dygraph.MONTHLY) { |
32988383 | 1530 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1531 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
3d29302c | 1532 | var format = '%d%b'; // e.g. "1Jan" |
076c9622 DV |
1533 | |
1534 | // Find a time less than start_time which occurs on a "nice" time boundary | |
1535 | // for this granularity. | |
1536 | var g = spacing / 1000; | |
076c9622 DV |
1537 | var d = new Date(start_time); |
1538 | if (g <= 60) { // seconds | |
1539 | var x = d.getSeconds(); d.setSeconds(x - x % g); | |
1540 | } else { | |
1541 | d.setSeconds(0); | |
1542 | g /= 60; | |
1543 | if (g <= 60) { // minutes | |
1544 | var x = d.getMinutes(); d.setMinutes(x - x % g); | |
1545 | } else { | |
1546 | d.setMinutes(0); | |
1547 | g /= 60; | |
1548 | ||
1549 | if (g <= 24) { // days | |
1550 | var x = d.getHours(); d.setHours(x - x % g); | |
1551 | } else { | |
1552 | d.setHours(0); | |
1553 | g /= 24; | |
1554 | ||
1555 | if (g == 7) { // one week | |
20a41c17 | 1556 | d.setDate(d.getDate() - d.getDay()); |
076c9622 DV |
1557 | } |
1558 | } | |
1559 | } | |
328bb812 | 1560 | } |
076c9622 DV |
1561 | start_time = d.getTime(); |
1562 | ||
32988383 | 1563 | for (var t = start_time; t <= end_time; t += spacing) { |
bf640e56 | 1564 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1565 | } |
1566 | } else { | |
1567 | // Display a tick mark on the first of a set of months of each year. | |
1568 | // Years get a tick mark iff y % year_mod == 0. This is useful for | |
1569 | // displaying a tick mark once every 10 years, say, on long time scales. | |
1570 | var months; | |
1571 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1572 | ||
285a6bda | 1573 | if (granularity == Dygraph.MONTHLY) { |
32988383 | 1574 | months = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ]; |
285a6bda | 1575 | } else if (granularity == Dygraph.QUARTERLY) { |
32988383 | 1576 | months = [ 0, 3, 6, 9 ]; |
285a6bda | 1577 | } else if (granularity == Dygraph.BIANNUAL) { |
32988383 | 1578 | months = [ 0, 6 ]; |
285a6bda | 1579 | } else if (granularity == Dygraph.ANNUAL) { |
32988383 | 1580 | months = [ 0 ]; |
285a6bda | 1581 | } else if (granularity == Dygraph.DECADAL) { |
32988383 DV |
1582 | months = [ 0 ]; |
1583 | year_mod = 10; | |
1584 | } | |
1585 | ||
1586 | var start_year = new Date(start_time).getFullYear(); | |
1587 | var end_year = new Date(end_time).getFullYear(); | |
285a6bda | 1588 | var zeropad = Dygraph.zeropad; |
32988383 DV |
1589 | for (var i = start_year; i <= end_year; i++) { |
1590 | if (i % year_mod != 0) continue; | |
1591 | for (var j = 0; j < months.length; j++) { | |
1592 | var date_str = i + "/" + zeropad(1 + months[j]) + "/01"; | |
1593 | var t = Date.parse(date_str); | |
1594 | if (t < start_time || t > end_time) continue; | |
bf640e56 | 1595 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1596 | } |
1597 | } | |
1598 | } | |
1599 | ||
1600 | return ticks; | |
1601 | }; | |
1602 | ||
6a1aa64f DV |
1603 | |
1604 | /** | |
1605 | * Add ticks to the x-axis based on a date range. | |
1606 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1607 | * @param {Number} endDate End of the date window (millis since epoch) | |
1608 | * @return {Array.<Object>} Array of {label, value} tuples. | |
1609 | * @public | |
1610 | */ | |
285a6bda | 1611 | Dygraph.dateTicker = function(startDate, endDate, self) { |
32988383 | 1612 | var chosen = -1; |
285a6bda DV |
1613 | for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) { |
1614 | var num_ticks = self.NumXTicks(startDate, endDate, i); | |
1615 | if (self.width_ / num_ticks >= self.attr_('pixelsPerXLabel')) { | |
32988383 DV |
1616 | chosen = i; |
1617 | break; | |
2769de62 | 1618 | } |
6a1aa64f DV |
1619 | } |
1620 | ||
32988383 | 1621 | if (chosen >= 0) { |
285a6bda | 1622 | return self.GetXAxis(startDate, endDate, chosen); |
6a1aa64f | 1623 | } else { |
32988383 | 1624 | // TODO(danvk): signal error. |
6a1aa64f | 1625 | } |
6a1aa64f DV |
1626 | }; |
1627 | ||
1628 | /** | |
1629 | * Add ticks when the x axis has numbers on it (instead of dates) | |
1630 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1631 | * @param {Number} endDate End of the date window (millis since epoch) | |
84fc6aa7 NN |
1632 | * @param self |
1633 | * @param {function} formatter: Optional formatter to use for each tick value | |
6a1aa64f DV |
1634 | * @return {Array.<Object>} Array of {label, value} tuples. |
1635 | * @public | |
1636 | */ | |
84fc6aa7 | 1637 | Dygraph.numericTicks = function(minV, maxV, self, formatter) { |
c6336f04 DV |
1638 | // Basic idea: |
1639 | // Try labels every 1, 2, 5, 10, 20, 50, 100, etc. | |
1640 | // Calculate the resulting tick spacing (i.e. this.height_ / nTicks). | |
285a6bda | 1641 | // The first spacing greater than pixelsPerYLabel is what we use. |
ff00d3e2 | 1642 | // TODO(danvk): version that works on a log scale. |
f09e46d4 DV |
1643 | if (self.attr_("labelsKMG2")) { |
1644 | var mults = [1, 2, 4, 8]; | |
1645 | } else { | |
1646 | var mults = [1, 2, 5]; | |
1647 | } | |
c6336f04 | 1648 | var scale, low_val, high_val, nTicks; |
285a6bda DV |
1649 | // TODO(danvk): make it possible to set this for x- and y-axes independently. |
1650 | var pixelsPerTick = self.attr_('pixelsPerYLabel'); | |
c6336f04 | 1651 | for (var i = -10; i < 50; i++) { |
f09e46d4 DV |
1652 | if (self.attr_("labelsKMG2")) { |
1653 | var base_scale = Math.pow(16, i); | |
1654 | } else { | |
1655 | var base_scale = Math.pow(10, i); | |
1656 | } | |
c6336f04 DV |
1657 | for (var j = 0; j < mults.length; j++) { |
1658 | scale = base_scale * mults[j]; | |
c6336f04 DV |
1659 | low_val = Math.floor(minV / scale) * scale; |
1660 | high_val = Math.ceil(maxV / scale) * scale; | |
48a0ac91 | 1661 | nTicks = Math.abs(high_val - low_val) / scale; |
285a6bda | 1662 | var spacing = self.height_ / nTicks; |
c6336f04 | 1663 | // wish I could break out of both loops at once... |
285a6bda | 1664 | if (spacing > pixelsPerTick) break; |
c6336f04 | 1665 | } |
285a6bda | 1666 | if (spacing > pixelsPerTick) break; |
6a1aa64f DV |
1667 | } |
1668 | ||
1669 | // Construct labels for the ticks | |
1670 | var ticks = []; | |
ed11be50 DV |
1671 | var k; |
1672 | var k_labels = []; | |
1673 | if (self.attr_("labelsKMB")) { | |
1674 | k = 1000; | |
1675 | k_labels = [ "K", "M", "B", "T" ]; | |
1676 | } | |
1677 | if (self.attr_("labelsKMG2")) { | |
1678 | if (k) self.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); | |
1679 | k = 1024; | |
1680 | k_labels = [ "k", "M", "G", "T" ]; | |
1681 | } | |
1682 | ||
e21e69e2 | 1683 | // Allow reverse y-axis if it's explicitly requested. |
be7cdb11 | 1684 | if (low_val > high_val) scale *= -1; |
48a0ac91 | 1685 | |
c6336f04 DV |
1686 | for (var i = 0; i < nTicks; i++) { |
1687 | var tickV = low_val + i * scale; | |
0af6e346 | 1688 | var absTickV = Math.abs(tickV); |
84fc6aa7 NN |
1689 | var label; |
1690 | if (formatter != undefined) { | |
1691 | label = formatter(tickV); | |
1692 | } else { | |
1693 | label = Dygraph.round_(tickV, 2); | |
1694 | } | |
ed11be50 DV |
1695 | if (k_labels.length) { |
1696 | // Round up to an appropriate unit. | |
1697 | var n = k*k*k*k; | |
1698 | for (var j = 3; j >= 0; j--, n /= k) { | |
1699 | if (absTickV >= n) { | |
029da4b6 | 1700 | label = Dygraph.round_(tickV / n, 1) + k_labels[j]; |
ed11be50 DV |
1701 | break; |
1702 | } | |
afefbcdb | 1703 | } |
6a1aa64f DV |
1704 | } |
1705 | ticks.push( {label: label, v: tickV} ); | |
1706 | } | |
1707 | return ticks; | |
1708 | }; | |
1709 | ||
1710 | /** | |
1711 | * Adds appropriate ticks on the y-axis | |
1712 | * @param {Number} minY The minimum Y value in the data set | |
1713 | * @param {Number} maxY The maximum Y value in the data set | |
1714 | * @private | |
1715 | */ | |
285a6bda | 1716 | Dygraph.prototype.addYTicks_ = function(minY, maxY) { |
6a1aa64f | 1717 | // Set the number of ticks so that the labels are human-friendly. |
285a6bda | 1718 | // TODO(danvk): make this an attribute as well. |
84fc6aa7 NN |
1719 | var formatter = this.attr_('yAxisLabelFormatter') ? this.attr_('yAxisLabelFormatter') : this.attr_('yValueFormatter'); |
1720 | var ticks = Dygraph.numericTicks(minY, maxY, this, formatter); | |
6a1aa64f DV |
1721 | this.layout_.updateOptions( { yAxis: [minY, maxY], |
1722 | yTicks: ticks } ); | |
1723 | }; | |
1724 | ||
5011e7a1 DV |
1725 | // Computes the range of the data series (including confidence intervals). |
1726 | // series is either [ [x1, y1], [x2, y2], ... ] or | |
1727 | // [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... | |
1728 | // Returns [low, high] | |
1729 | Dygraph.prototype.extremeValues_ = function(series) { | |
1730 | var minY = null, maxY = null; | |
1731 | ||
9922b78b | 1732 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
5011e7a1 DV |
1733 | if (bars) { |
1734 | // With custom bars, maxY is the max of the high values. | |
1735 | for (var j = 0; j < series.length; j++) { | |
1736 | var y = series[j][1][0]; | |
1737 | if (!y) continue; | |
1738 | var low = y - series[j][1][1]; | |
1739 | var high = y + series[j][1][2]; | |
1740 | if (low > y) low = y; // this can happen with custom bars, | |
1741 | if (high < y) high = y; // e.g. in tests/custom-bars.html | |
1742 | if (maxY == null || high > maxY) { | |
1743 | maxY = high; | |
1744 | } | |
1745 | if (minY == null || low < minY) { | |
1746 | minY = low; | |
1747 | } | |
1748 | } | |
1749 | } else { | |
1750 | for (var j = 0; j < series.length; j++) { | |
1751 | var y = series[j][1]; | |
d12999d3 | 1752 | if (y === null || isNaN(y)) continue; |
5011e7a1 DV |
1753 | if (maxY == null || y > maxY) { |
1754 | maxY = y; | |
1755 | } | |
1756 | if (minY == null || y < minY) { | |
1757 | minY = y; | |
1758 | } | |
1759 | } | |
1760 | } | |
1761 | ||
1762 | return [minY, maxY]; | |
1763 | }; | |
1764 | ||
6a1aa64f DV |
1765 | /** |
1766 | * Update the graph with new data. Data is in the format | |
1767 | * [ [date1, val1, val2, ...], [date2, val1, val2, ...] if errorBars=false | |
1768 | * or, if errorBars=true, | |
1769 | * [ [date1, [val1,stddev1], [val2,stddev2], ...], [date2, ...], ...] | |
1770 | * @param {Array.<Object>} data The data (see above) | |
1771 | * @private | |
1772 | */ | |
285a6bda | 1773 | Dygraph.prototype.drawGraph_ = function(data) { |
fe0b7c03 DV |
1774 | // This is used to set the second parameter to drawCallback, below. |
1775 | var is_initial_draw = this.is_initial_draw_; | |
1776 | this.is_initial_draw_ = false; | |
1777 | ||
3bd9c228 | 1778 | var minY = null, maxY = null; |
6a1aa64f | 1779 | this.layout_.removeAllDatasets(); |
285a6bda | 1780 | this.setColors_(); |
9317362d | 1781 | this.attrs_['pointSize'] = 0.5 * this.attr_('highlightCircleSize'); |
285a6bda | 1782 | |
354e15ab DE |
1783 | // Loop over the fields (series). Go from the last to the first, |
1784 | // because if they're stacked that's how we accumulate the values. | |
43af96e7 | 1785 | |
354e15ab DE |
1786 | var cumulative_y = []; // For stacked series. |
1787 | var datasets = []; | |
1788 | ||
1789 | // Loop over all fields and create datasets | |
1790 | for (var i = data[0].length - 1; i >= 1; i--) { | |
1cf11047 DV |
1791 | if (!this.visibility()[i - 1]) continue; |
1792 | ||
450fe64b DV |
1793 | var connectSeparatedPoints = this.attr_('connectSeparatedPoints', i); |
1794 | ||
6a1aa64f DV |
1795 | var series = []; |
1796 | for (var j = 0; j < data.length; j++) { | |
4a634fc7 | 1797 | if (data[j][i] != null || !connectSeparatedPoints) { |
f032c51d | 1798 | var date = data[j][0]; |
563c70ca | 1799 | series.push([date, data[j][i]]); |
f032c51d | 1800 | } |
6a1aa64f DV |
1801 | } |
1802 | series = this.rollingAverage(series, this.rollPeriod_); | |
1803 | ||
1804 | // Prune down to the desired range, if necessary (for zooming) | |
1a26f3fb DV |
1805 | // Because there can be lines going to points outside of the visible area, |
1806 | // we actually prune to visible points, plus one on either side. | |
9922b78b | 1807 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
6a1aa64f DV |
1808 | if (this.dateWindow_) { |
1809 | var low = this.dateWindow_[0]; | |
1810 | var high= this.dateWindow_[1]; | |
1811 | var pruned = []; | |
1a26f3fb DV |
1812 | // TODO(danvk): do binary search instead of linear search. |
1813 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. | |
1814 | var firstIdx = null, lastIdx = null; | |
6a1aa64f | 1815 | for (var k = 0; k < series.length; k++) { |
1a26f3fb DV |
1816 | if (series[k][0] >= low && firstIdx === null) { |
1817 | firstIdx = k; | |
1818 | } | |
1819 | if (series[k][0] <= high) { | |
1820 | lastIdx = k; | |
6a1aa64f DV |
1821 | } |
1822 | } | |
1a26f3fb DV |
1823 | if (firstIdx === null) firstIdx = 0; |
1824 | if (firstIdx > 0) firstIdx--; | |
1825 | if (lastIdx === null) lastIdx = series.length - 1; | |
1826 | if (lastIdx < series.length - 1) lastIdx++; | |
16269f6e | 1827 | this.boundaryIds_[i-1] = [firstIdx, lastIdx]; |
1a26f3fb DV |
1828 | for (var k = firstIdx; k <= lastIdx; k++) { |
1829 | pruned.push(series[k]); | |
6a1aa64f DV |
1830 | } |
1831 | series = pruned; | |
16269f6e NAG |
1832 | } else { |
1833 | this.boundaryIds_[i-1] = [0, series.length-1]; | |
6a1aa64f DV |
1834 | } |
1835 | ||
648acd28 DV |
1836 | var extremes = this.extremeValues_(series); |
1837 | var thisMinY = extremes[0]; | |
1838 | var thisMaxY = extremes[1]; | |
af4cad8b NN |
1839 | if (minY === null || (thisMinY != null && thisMinY < minY)) minY = thisMinY; |
1840 | if (maxY === null || (thisMaxY != null && thisMaxY > maxY)) maxY = thisMaxY; | |
5011e7a1 | 1841 | |
6a1aa64f | 1842 | if (bars) { |
354e15ab DE |
1843 | for (var j=0; j<series.length; j++) { |
1844 | val = [series[j][0], series[j][1][0], series[j][1][1], series[j][1][2]]; | |
1845 | series[j] = val; | |
1846 | } | |
43af96e7 | 1847 | } else if (this.attr_("stackedGraph")) { |
43af96e7 NK |
1848 | var l = series.length; |
1849 | var actual_y; | |
1850 | for (var j = 0; j < l; j++) { | |
354e15ab DE |
1851 | // If one data set has a NaN, let all subsequent stacked |
1852 | // sets inherit the NaN -- only start at 0 for the first set. | |
1853 | var x = series[j][0]; | |
1854 | if (cumulative_y[x] === undefined) | |
1855 | cumulative_y[x] = 0; | |
43af96e7 NK |
1856 | |
1857 | actual_y = series[j][1]; | |
354e15ab | 1858 | cumulative_y[x] += actual_y; |
43af96e7 | 1859 | |
354e15ab | 1860 | series[j] = [x, cumulative_y[x]] |
43af96e7 | 1861 | |
354e15ab DE |
1862 | if (!maxY || cumulative_y[x] > maxY) |
1863 | maxY = cumulative_y[x]; | |
43af96e7 | 1864 | } |
6a1aa64f | 1865 | } |
354e15ab DE |
1866 | |
1867 | datasets[i] = series; | |
6a1aa64f DV |
1868 | } |
1869 | ||
354e15ab | 1870 | for (var i = 1; i < datasets.length; i++) { |
4523c1f6 | 1871 | if (!this.visibility()[i - 1]) continue; |
354e15ab | 1872 | this.layout_.addDataset(this.attr_("labels")[i], datasets[i]); |
43af96e7 NK |
1873 | } |
1874 | ||
6a1aa64f | 1875 | // Use some heuristics to come up with a good maxY value, unless it's been |
8b83c6cc RK |
1876 | // set explicitly by the developer or end-user (via drag) |
1877 | if (this.valueWindow_ != null) { | |
1878 | this.addYTicks_(this.valueWindow_[0], this.valueWindow_[1]); | |
1879 | this.displayedYRange_ = this.valueWindow_; | |
6a1aa64f | 1880 | } else { |
d053ab5a DV |
1881 | // This affects the calculation of span, below. |
1882 | if (this.attr_("includeZero") && minY > 0) { | |
1883 | minY = 0; | |
1884 | } | |
1885 | ||
6a1aa64f | 1886 | // Add some padding and round up to an integer to be human-friendly. |
3bd9c228 | 1887 | var span = maxY - minY; |
93dfacfd DV |
1888 | // special case: if we have no sense of scale, use +/-10% of the sole value. |
1889 | if (span == 0) { span = maxY; } | |
3bd9c228 DV |
1890 | var maxAxisY = maxY + 0.1 * span; |
1891 | var minAxisY = minY - 0.1 * span; | |
1892 | ||
1893 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. | |
00c281d4 NN |
1894 | if (!this.attr_("avoidMinZero")) { |
1895 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; | |
1896 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
1897 | } | |
3bd9c228 DV |
1898 | |
1899 | if (this.attr_("includeZero")) { | |
1900 | if (maxY < 0) maxAxisY = 0; | |
1901 | if (minY > 0) minAxisY = 0; | |
1902 | } | |
1903 | ||
1904 | this.addYTicks_(minAxisY, maxAxisY); | |
3230c662 | 1905 | this.displayedYRange_ = [minAxisY, maxAxisY]; |
6a1aa64f DV |
1906 | } |
1907 | ||
1908 | this.addXTicks_(); | |
1909 | ||
1910 | // Tell PlotKit to use this new data and render itself | |
d033ae1c | 1911 | this.layout_.updateOptions({dateWindow: this.dateWindow_}); |
6a1aa64f DV |
1912 | this.layout_.evaluateWithError(); |
1913 | this.plotter_.clear(); | |
1914 | this.plotter_.render(); | |
f6401bf6 DV |
1915 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
1916 | this.canvas_.height); | |
599fb4ad DV |
1917 | |
1918 | if (this.attr_("drawCallback") !== null) { | |
fe0b7c03 | 1919 | this.attr_("drawCallback")(this, is_initial_draw); |
599fb4ad | 1920 | } |
6a1aa64f DV |
1921 | }; |
1922 | ||
1923 | /** | |
1924 | * Calculates the rolling average of a data set. | |
1925 | * If originalData is [label, val], rolls the average of those. | |
1926 | * If originalData is [label, [, it's interpreted as [value, stddev] | |
1927 | * and the roll is returned in the same form, with appropriately reduced | |
1928 | * stddev for each value. | |
1929 | * Note that this is where fractional input (i.e. '5/10') is converted into | |
1930 | * decimal values. | |
1931 | * @param {Array} originalData The data in the appropriate format (see above) | |
1932 | * @param {Number} rollPeriod The number of days over which to average the data | |
1933 | */ | |
285a6bda | 1934 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
6a1aa64f DV |
1935 | if (originalData.length < 2) |
1936 | return originalData; | |
1937 | var rollPeriod = Math.min(rollPeriod, originalData.length - 1); | |
1938 | var rollingData = []; | |
285a6bda | 1939 | var sigma = this.attr_("sigma"); |
6a1aa64f DV |
1940 | |
1941 | if (this.fractions_) { | |
1942 | var num = 0; | |
1943 | var den = 0; // numerator/denominator | |
1944 | var mult = 100.0; | |
1945 | for (var i = 0; i < originalData.length; i++) { | |
1946 | num += originalData[i][1][0]; | |
1947 | den += originalData[i][1][1]; | |
1948 | if (i - rollPeriod >= 0) { | |
1949 | num -= originalData[i - rollPeriod][1][0]; | |
1950 | den -= originalData[i - rollPeriod][1][1]; | |
1951 | } | |
1952 | ||
1953 | var date = originalData[i][0]; | |
1954 | var value = den ? num / den : 0.0; | |
285a6bda | 1955 | if (this.attr_("errorBars")) { |
6a1aa64f DV |
1956 | if (this.wilsonInterval_) { |
1957 | // For more details on this confidence interval, see: | |
1958 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval | |
1959 | if (den) { | |
1960 | var p = value < 0 ? 0 : value, n = den; | |
1961 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); | |
1962 | var denom = 1 + sigma * sigma / den; | |
1963 | var low = (p + sigma * sigma / (2 * den) - pm) / denom; | |
1964 | var high = (p + sigma * sigma / (2 * den) + pm) / denom; | |
1965 | rollingData[i] = [date, | |
1966 | [p * mult, (p - low) * mult, (high - p) * mult]]; | |
1967 | } else { | |
1968 | rollingData[i] = [date, [0, 0, 0]]; | |
1969 | } | |
1970 | } else { | |
1971 | var stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; | |
1972 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; | |
1973 | } | |
1974 | } else { | |
1975 | rollingData[i] = [date, mult * value]; | |
1976 | } | |
1977 | } | |
9922b78b | 1978 | } else if (this.attr_("customBars")) { |
f6885d6a DV |
1979 | var low = 0; |
1980 | var mid = 0; | |
1981 | var high = 0; | |
1982 | var count = 0; | |
6a1aa64f DV |
1983 | for (var i = 0; i < originalData.length; i++) { |
1984 | var data = originalData[i][1]; | |
1985 | var y = data[1]; | |
1986 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; | |
f6885d6a | 1987 | |
8b91c51f | 1988 | if (y != null && !isNaN(y)) { |
49a7d0d5 DV |
1989 | low += data[0]; |
1990 | mid += y; | |
1991 | high += data[2]; | |
1992 | count += 1; | |
1993 | } | |
f6885d6a DV |
1994 | if (i - rollPeriod >= 0) { |
1995 | var prev = originalData[i - rollPeriod]; | |
8b91c51f | 1996 | if (prev[1][1] != null && !isNaN(prev[1][1])) { |
49a7d0d5 DV |
1997 | low -= prev[1][0]; |
1998 | mid -= prev[1][1]; | |
1999 | high -= prev[1][2]; | |
2000 | count -= 1; | |
2001 | } | |
f6885d6a DV |
2002 | } |
2003 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, | |
2004 | 1.0 * (mid - low) / count, | |
2005 | 1.0 * (high - mid) / count ]]; | |
2769de62 | 2006 | } |
6a1aa64f DV |
2007 | } else { |
2008 | // Calculate the rolling average for the first rollPeriod - 1 points where | |
2009 | // there is not enough data to roll over the full number of days | |
2010 | var num_init_points = Math.min(rollPeriod - 1, originalData.length - 2); | |
285a6bda | 2011 | if (!this.attr_("errorBars")){ |
5011e7a1 DV |
2012 | if (rollPeriod == 1) { |
2013 | return originalData; | |
2014 | } | |
2015 | ||
2847c1cf | 2016 | for (var i = 0; i < originalData.length; i++) { |
6a1aa64f | 2017 | var sum = 0; |
5011e7a1 | 2018 | var num_ok = 0; |
2847c1cf DV |
2019 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
2020 | var y = originalData[j][1]; | |
8b91c51f | 2021 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 2022 | num_ok++; |
2847c1cf | 2023 | sum += originalData[j][1]; |
6a1aa64f | 2024 | } |
5011e7a1 | 2025 | if (num_ok) { |
2847c1cf | 2026 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
5011e7a1 | 2027 | } else { |
2847c1cf | 2028 | rollingData[i] = [originalData[i][0], null]; |
5011e7a1 | 2029 | } |
6a1aa64f | 2030 | } |
2847c1cf DV |
2031 | |
2032 | } else { | |
2033 | for (var i = 0; i < originalData.length; i++) { | |
6a1aa64f DV |
2034 | var sum = 0; |
2035 | var variance = 0; | |
5011e7a1 | 2036 | var num_ok = 0; |
2847c1cf | 2037 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
5011e7a1 | 2038 | var y = originalData[j][1][0]; |
8b91c51f | 2039 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 2040 | num_ok++; |
6a1aa64f DV |
2041 | sum += originalData[j][1][0]; |
2042 | variance += Math.pow(originalData[j][1][1], 2); | |
2043 | } | |
5011e7a1 DV |
2044 | if (num_ok) { |
2045 | var stddev = Math.sqrt(variance) / num_ok; | |
2046 | rollingData[i] = [originalData[i][0], | |
2047 | [sum / num_ok, sigma * stddev, sigma * stddev]]; | |
2048 | } else { | |
2049 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
2050 | } | |
6a1aa64f DV |
2051 | } |
2052 | } | |
2053 | } | |
2054 | ||
2055 | return rollingData; | |
2056 | }; | |
2057 | ||
2058 | /** | |
2059 | * Parses a date, returning the number of milliseconds since epoch. This can be | |
285a6bda DV |
2060 | * passed in as an xValueParser in the Dygraph constructor. |
2061 | * TODO(danvk): enumerate formats that this understands. | |
6a1aa64f DV |
2062 | * @param {String} A date in YYYYMMDD format. |
2063 | * @return {Number} Milliseconds since epoch. | |
2064 | * @public | |
2065 | */ | |
285a6bda | 2066 | Dygraph.dateParser = function(dateStr, self) { |
6a1aa64f | 2067 | var dateStrSlashed; |
285a6bda | 2068 | var d; |
986a5026 | 2069 | if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12' |
6a1aa64f | 2070 | dateStrSlashed = dateStr.replace("-", "/", "g"); |
353a0294 DV |
2071 | while (dateStrSlashed.search("-") != -1) { |
2072 | dateStrSlashed = dateStrSlashed.replace("-", "/"); | |
2073 | } | |
285a6bda | 2074 | d = Date.parse(dateStrSlashed); |
2769de62 | 2075 | } else if (dateStr.length == 8) { // e.g. '20090712' |
285a6bda | 2076 | // TODO(danvk): remove support for this format. It's confusing. |
6a1aa64f DV |
2077 | dateStrSlashed = dateStr.substr(0,4) + "/" + dateStr.substr(4,2) |
2078 | + "/" + dateStr.substr(6,2); | |
285a6bda | 2079 | d = Date.parse(dateStrSlashed); |
2769de62 DV |
2080 | } else { |
2081 | // Any format that Date.parse will accept, e.g. "2009/07/12" or | |
2082 | // "2009/07/12 12:34:56" | |
285a6bda DV |
2083 | d = Date.parse(dateStr); |
2084 | } | |
2085 | ||
2086 | if (!d || isNaN(d)) { | |
2087 | self.error("Couldn't parse " + dateStr + " as a date"); | |
2088 | } | |
2089 | return d; | |
2090 | }; | |
2091 | ||
2092 | /** | |
2093 | * Detects the type of the str (date or numeric) and sets the various | |
2094 | * formatting attributes in this.attrs_ based on this type. | |
2095 | * @param {String} str An x value. | |
2096 | * @private | |
2097 | */ | |
2098 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
2099 | var isDate = false; | |
2100 | if (str.indexOf('-') >= 0 || | |
2101 | str.indexOf('/') >= 0 || | |
2102 | isNaN(parseFloat(str))) { | |
2103 | isDate = true; | |
2104 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
2105 | // TODO(danvk): remove support for this format. | |
2106 | isDate = true; | |
2107 | } | |
2108 | ||
2109 | if (isDate) { | |
2110 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
2111 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2112 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2113 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
2114 | } else { |
2115 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
2116 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
2117 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2118 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
6a1aa64f | 2119 | } |
6a1aa64f DV |
2120 | }; |
2121 | ||
2122 | /** | |
2123 | * Parses a string in a special csv format. We expect a csv file where each | |
2124 | * line is a date point, and the first field in each line is the date string. | |
2125 | * We also expect that all remaining fields represent series. | |
285a6bda | 2126 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f DV |
2127 | * date, series1, stddev1, series2, stddev2, ... |
2128 | * @param {Array.<Object>} data See above. | |
2129 | * @private | |
285a6bda DV |
2130 | * |
2131 | * @return Array.<Object> An array with one entry for each row. These entries | |
2132 | * are an array of cells in that row. The first entry is the parsed x-value for | |
2133 | * the row. The second, third, etc. are the y-values. These can take on one of | |
2134 | * three forms, depending on the CSV and constructor parameters: | |
2135 | * 1. numeric value | |
2136 | * 2. [ value, stddev ] | |
2137 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 2138 | */ |
285a6bda | 2139 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f DV |
2140 | var ret = []; |
2141 | var lines = data.split("\n"); | |
3d67f03b DV |
2142 | |
2143 | // Use the default delimiter or fall back to a tab if that makes sense. | |
2144 | var delim = this.attr_('delimiter'); | |
2145 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { | |
2146 | delim = '\t'; | |
2147 | } | |
2148 | ||
285a6bda | 2149 | var start = 0; |
6a1aa64f | 2150 | if (this.labelsFromCSV_) { |
285a6bda | 2151 | start = 1; |
3d67f03b | 2152 | this.attrs_.labels = lines[0].split(delim); |
6a1aa64f DV |
2153 | } |
2154 | ||
03b522a4 DV |
2155 | // Parse the x as a float or return null if it's not a number. |
2156 | var parseFloatOrNull = function(x) { | |
41333ec0 DV |
2157 | var val = parseFloat(x); |
2158 | return isNaN(val) ? null : val; | |
03b522a4 DV |
2159 | }; |
2160 | ||
285a6bda DV |
2161 | var xParser; |
2162 | var defaultParserSet = false; // attempt to auto-detect x value type | |
2163 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 2164 | var outOfOrder = false; |
6a1aa64f DV |
2165 | for (var i = start; i < lines.length; i++) { |
2166 | var line = lines[i]; | |
2167 | if (line.length == 0) continue; // skip blank lines | |
3d67f03b DV |
2168 | if (line[0] == '#') continue; // skip comment lines |
2169 | var inFields = line.split(delim); | |
285a6bda | 2170 | if (inFields.length < 2) continue; |
6a1aa64f DV |
2171 | |
2172 | var fields = []; | |
285a6bda DV |
2173 | if (!defaultParserSet) { |
2174 | this.detectTypeFromString_(inFields[0]); | |
2175 | xParser = this.attr_("xValueParser"); | |
2176 | defaultParserSet = true; | |
2177 | } | |
2178 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
2179 | |
2180 | // If fractions are expected, parse the numbers as "A/B" | |
2181 | if (this.fractions_) { | |
2182 | for (var j = 1; j < inFields.length; j++) { | |
2183 | // TODO(danvk): figure out an appropriate way to flag parse errors. | |
2184 | var vals = inFields[j].split("/"); | |
03b522a4 | 2185 | fields[j] = [parseFloatOrNull(vals[0]), parseFloatOrNull(vals[1])]; |
6a1aa64f | 2186 | } |
285a6bda | 2187 | } else if (this.attr_("errorBars")) { |
6a1aa64f DV |
2188 | // If there are error bars, values are (value, stddev) pairs |
2189 | for (var j = 1; j < inFields.length; j += 2) | |
03b522a4 DV |
2190 | fields[(j + 1) / 2] = [parseFloatOrNull(inFields[j]), |
2191 | parseFloatOrNull(inFields[j + 1])]; | |
9922b78b | 2192 | } else if (this.attr_("customBars")) { |
6a1aa64f DV |
2193 | // Bars are a low;center;high tuple |
2194 | for (var j = 1; j < inFields.length; j++) { | |
2195 | var vals = inFields[j].split(";"); | |
03b522a4 DV |
2196 | fields[j] = [ parseFloatOrNull(vals[0]), |
2197 | parseFloatOrNull(vals[1]), | |
2198 | parseFloatOrNull(vals[2]) ]; | |
6a1aa64f DV |
2199 | } |
2200 | } else { | |
2201 | // Values are just numbers | |
285a6bda | 2202 | for (var j = 1; j < inFields.length; j++) { |
03b522a4 | 2203 | fields[j] = parseFloatOrNull(inFields[j]); |
285a6bda | 2204 | } |
6a1aa64f | 2205 | } |
987840a2 DV |
2206 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
2207 | outOfOrder = true; | |
2208 | } | |
6a1aa64f | 2209 | ret.push(fields); |
285a6bda DV |
2210 | |
2211 | if (fields.length != expectedCols) { | |
2212 | this.error("Number of columns in line " + i + " (" + fields.length + | |
2213 | ") does not agree with number of labels (" + expectedCols + | |
2214 | ") " + line); | |
2215 | } | |
6a1aa64f | 2216 | } |
987840a2 DV |
2217 | |
2218 | if (outOfOrder) { | |
2219 | this.warn("CSV is out of order; order it correctly to speed loading."); | |
2220 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2221 | } | |
2222 | ||
6a1aa64f DV |
2223 | return ret; |
2224 | }; | |
2225 | ||
2226 | /** | |
285a6bda DV |
2227 | * The user has provided their data as a pre-packaged JS array. If the x values |
2228 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
2229 | * are dates, we need to convert them from Date objects to ms since epoch. | |
2230 | * @param {Array.<Object>} data | |
2231 | * @return {Array.<Object>} data with numeric x values. | |
2232 | */ | |
2233 | Dygraph.prototype.parseArray_ = function(data) { | |
2234 | // Peek at the first x value to see if it's numeric. | |
2235 | if (data.length == 0) { | |
2236 | this.error("Can't plot empty data set"); | |
2237 | return null; | |
2238 | } | |
2239 | if (data[0].length == 0) { | |
2240 | this.error("Data set cannot contain an empty row"); | |
2241 | return null; | |
2242 | } | |
2243 | ||
2244 | if (this.attr_("labels") == null) { | |
2245 | this.warn("Using default labels. Set labels explicitly via 'labels' " + | |
2246 | "in the options parameter"); | |
2247 | this.attrs_.labels = [ "X" ]; | |
2248 | for (var i = 1; i < data[0].length; i++) { | |
2249 | this.attrs_.labels.push("Y" + i); | |
2250 | } | |
2251 | } | |
2252 | ||
2dda3850 | 2253 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda DV |
2254 | // Some intelligent defaults for a date x-axis. |
2255 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
bf640e56 | 2256 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
2257 | this.attrs_.xTicker = Dygraph.dateTicker; |
2258 | ||
2259 | // Assume they're all dates. | |
e3ab7b40 | 2260 | var parsedData = Dygraph.clone(data); |
285a6bda DV |
2261 | for (var i = 0; i < data.length; i++) { |
2262 | if (parsedData[i].length == 0) { | |
a323ff4a | 2263 | this.error("Row " + (1 + i) + " of data is empty"); |
285a6bda DV |
2264 | return null; |
2265 | } | |
2266 | if (parsedData[i][0] == null | |
3a909ec5 DV |
2267 | || typeof(parsedData[i][0].getTime) != 'function' |
2268 | || isNaN(parsedData[i][0].getTime())) { | |
be96a1f5 | 2269 | this.error("x value in row " + (1 + i) + " is not a Date"); |
285a6bda DV |
2270 | return null; |
2271 | } | |
2272 | parsedData[i][0] = parsedData[i][0].getTime(); | |
2273 | } | |
2274 | return parsedData; | |
2275 | } else { | |
2276 | // Some intelligent defaults for a numeric x-axis. | |
2277 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
2278 | this.attrs_.xTicker = Dygraph.numericTicks; | |
2279 | return data; | |
2280 | } | |
2281 | }; | |
2282 | ||
2283 | /** | |
79420a1e DV |
2284 | * Parses a DataTable object from gviz. |
2285 | * The data is expected to have a first column that is either a date or a | |
2286 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
2287 | * between this.xValueParser_ and the type of the first column, it will be | |
a685723c | 2288 | * fixed. Fills out rawData_. |
79420a1e DV |
2289 | * @param {Array.<Object>} data See above. |
2290 | * @private | |
2291 | */ | |
285a6bda | 2292 | Dygraph.prototype.parseDataTable_ = function(data) { |
79420a1e DV |
2293 | var cols = data.getNumberOfColumns(); |
2294 | var rows = data.getNumberOfRows(); | |
2295 | ||
d955e223 | 2296 | var indepType = data.getColumnType(0); |
4440f6c8 | 2297 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda DV |
2298 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
2299 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2300 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2301 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
33127159 | 2302 | } else if (indepType == 'number') { |
285a6bda DV |
2303 | this.attrs_.xValueFormatter = function(x) { return x; }; |
2304 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
2305 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2306 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
285a6bda | 2307 | } else { |
987840a2 DV |
2308 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
2309 | "column 1 of DataTable input (Got '" + indepType + "')"); | |
79420a1e DV |
2310 | return null; |
2311 | } | |
2312 | ||
a685723c DV |
2313 | // Array of the column indices which contain data (and not annotations). |
2314 | var colIdx = []; | |
2315 | var annotationCols = {}; // data index -> [annotation cols] | |
2316 | var hasAnnotations = false; | |
2317 | for (var i = 1; i < cols; i++) { | |
2318 | var type = data.getColumnType(i); | |
2319 | if (type == 'number') { | |
2320 | colIdx.push(i); | |
2321 | } else if (type == 'string' && this.attr_('displayAnnotations')) { | |
2322 | // This is OK -- it's an annotation column. | |
2323 | var dataIdx = colIdx[colIdx.length - 1]; | |
2324 | if (!annotationCols.hasOwnProperty(dataIdx)) { | |
2325 | annotationCols[dataIdx] = [i]; | |
2326 | } else { | |
2327 | annotationCols[dataIdx].push(i); | |
2328 | } | |
2329 | hasAnnotations = true; | |
2330 | } else { | |
2331 | this.error("Only 'number' is supported as a dependent type with Gviz." + | |
2332 | " 'string' is only supported if displayAnnotations is true"); | |
2333 | } | |
2334 | } | |
2335 | ||
2336 | // Read column labels | |
2337 | // TODO(danvk): add support back for errorBars | |
2338 | var labels = [data.getColumnLabel(0)]; | |
2339 | for (var i = 0; i < colIdx.length; i++) { | |
2340 | labels.push(data.getColumnLabel(colIdx[i])); | |
f9348814 | 2341 | if (this.attr_("errorBars")) i += 1; |
a685723c DV |
2342 | } |
2343 | this.attrs_.labels = labels; | |
2344 | cols = labels.length; | |
2345 | ||
79420a1e | 2346 | var ret = []; |
987840a2 | 2347 | var outOfOrder = false; |
a685723c | 2348 | var annotations = []; |
79420a1e DV |
2349 | for (var i = 0; i < rows; i++) { |
2350 | var row = []; | |
debe4434 DV |
2351 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
2352 | data.getValue(i, 0) === null) { | |
129569a5 FD |
2353 | this.warn("Ignoring row " + i + |
2354 | " of DataTable because of undefined or null first column."); | |
debe4434 DV |
2355 | continue; |
2356 | } | |
2357 | ||
c21d2c2d | 2358 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
2359 | row.push(data.getValue(i, 0).getTime()); |
2360 | } else { | |
2361 | row.push(data.getValue(i, 0)); | |
2362 | } | |
3e3f84e4 | 2363 | if (!this.attr_("errorBars")) { |
a685723c DV |
2364 | for (var j = 0; j < colIdx.length; j++) { |
2365 | var col = colIdx[j]; | |
2366 | row.push(data.getValue(i, col)); | |
2367 | if (hasAnnotations && | |
2368 | annotationCols.hasOwnProperty(col) && | |
2369 | data.getValue(i, annotationCols[col][0]) != null) { | |
2370 | var ann = {}; | |
2371 | ann.series = data.getColumnLabel(col); | |
2372 | ann.xval = row[0]; | |
2373 | ann.shortText = String.fromCharCode(65 /* A */ + annotations.length) | |
2374 | ann.text = ''; | |
2375 | for (var k = 0; k < annotationCols[col].length; k++) { | |
2376 | if (k) ann.text += "\n"; | |
2377 | ann.text += data.getValue(i, annotationCols[col][k]); | |
2378 | } | |
2379 | annotations.push(ann); | |
2380 | } | |
3e3f84e4 DV |
2381 | } |
2382 | } else { | |
2383 | for (var j = 0; j < cols - 1; j++) { | |
2384 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); | |
2385 | } | |
79420a1e | 2386 | } |
987840a2 DV |
2387 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
2388 | outOfOrder = true; | |
2389 | } | |
243d96e8 | 2390 | ret.push(row); |
79420a1e | 2391 | } |
987840a2 DV |
2392 | |
2393 | if (outOfOrder) { | |
2394 | this.warn("DataTable is out of order; order it correctly to speed loading."); | |
2395 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2396 | } | |
a685723c DV |
2397 | this.rawData_ = ret; |
2398 | ||
2399 | if (annotations.length > 0) { | |
2400 | this.setAnnotations(annotations, true); | |
2401 | } | |
79420a1e DV |
2402 | } |
2403 | ||
24e5350c | 2404 | // These functions are all based on MochiKit. |
fc80a396 DV |
2405 | Dygraph.update = function (self, o) { |
2406 | if (typeof(o) != 'undefined' && o !== null) { | |
2407 | for (var k in o) { | |
85b99f0b DV |
2408 | if (o.hasOwnProperty(k)) { |
2409 | self[k] = o[k]; | |
2410 | } | |
fc80a396 DV |
2411 | } |
2412 | } | |
2413 | return self; | |
2414 | }; | |
2415 | ||
2dda3850 DV |
2416 | Dygraph.isArrayLike = function (o) { |
2417 | var typ = typeof(o); | |
2418 | if ( | |
c21d2c2d | 2419 | (typ != 'object' && !(typ == 'function' && |
2dda3850 DV |
2420 | typeof(o.item) == 'function')) || |
2421 | o === null || | |
2422 | typeof(o.length) != 'number' || | |
2423 | o.nodeType === 3 | |
2424 | ) { | |
2425 | return false; | |
2426 | } | |
2427 | return true; | |
2428 | }; | |
2429 | ||
2430 | Dygraph.isDateLike = function (o) { | |
2431 | if (typeof(o) != "object" || o === null || | |
2432 | typeof(o.getTime) != 'function') { | |
2433 | return false; | |
2434 | } | |
2435 | return true; | |
2436 | }; | |
2437 | ||
e3ab7b40 DV |
2438 | Dygraph.clone = function(o) { |
2439 | // TODO(danvk): figure out how MochiKit's version works | |
2440 | var r = []; | |
2441 | for (var i = 0; i < o.length; i++) { | |
2442 | if (Dygraph.isArrayLike(o[i])) { | |
2443 | r.push(Dygraph.clone(o[i])); | |
2444 | } else { | |
2445 | r.push(o[i]); | |
2446 | } | |
2447 | } | |
2448 | return r; | |
24e5350c DV |
2449 | }; |
2450 | ||
2dda3850 | 2451 | |
79420a1e | 2452 | /** |
6a1aa64f DV |
2453 | * Get the CSV data. If it's in a function, call that function. If it's in a |
2454 | * file, do an XMLHttpRequest to get it. | |
2455 | * @private | |
2456 | */ | |
285a6bda | 2457 | Dygraph.prototype.start_ = function() { |
6a1aa64f | 2458 | if (typeof this.file_ == 'function') { |
285a6bda | 2459 | // CSV string. Pretend we got it via XHR. |
6a1aa64f | 2460 | this.loadedEvent_(this.file_()); |
2dda3850 | 2461 | } else if (Dygraph.isArrayLike(this.file_)) { |
285a6bda DV |
2462 | this.rawData_ = this.parseArray_(this.file_); |
2463 | this.drawGraph_(this.rawData_); | |
79420a1e DV |
2464 | } else if (typeof this.file_ == 'object' && |
2465 | typeof this.file_.getColumnRange == 'function') { | |
2466 | // must be a DataTable from gviz. | |
a685723c | 2467 | this.parseDataTable_(this.file_); |
79420a1e | 2468 | this.drawGraph_(this.rawData_); |
285a6bda DV |
2469 | } else if (typeof this.file_ == 'string') { |
2470 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. | |
2471 | if (this.file_.indexOf('\n') >= 0) { | |
2472 | this.loadedEvent_(this.file_); | |
2473 | } else { | |
2474 | var req = new XMLHttpRequest(); | |
2475 | var caller = this; | |
2476 | req.onreadystatechange = function () { | |
2477 | if (req.readyState == 4) { | |
2478 | if (req.status == 200) { | |
2479 | caller.loadedEvent_(req.responseText); | |
2480 | } | |
6a1aa64f | 2481 | } |
285a6bda | 2482 | }; |
6a1aa64f | 2483 | |
285a6bda DV |
2484 | req.open("GET", this.file_, true); |
2485 | req.send(null); | |
2486 | } | |
2487 | } else { | |
2488 | this.error("Unknown data format: " + (typeof this.file_)); | |
6a1aa64f DV |
2489 | } |
2490 | }; | |
2491 | ||
2492 | /** | |
2493 | * Changes various properties of the graph. These can include: | |
2494 | * <ul> | |
2495 | * <li>file: changes the source data for the graph</li> | |
2496 | * <li>errorBars: changes whether the data contains stddev</li> | |
2497 | * </ul> | |
2498 | * @param {Object} attrs The new properties and values | |
2499 | */ | |
285a6bda DV |
2500 | Dygraph.prototype.updateOptions = function(attrs) { |
2501 | // TODO(danvk): this is a mess. Rethink this function. | |
c65f2303 | 2502 | if ('rollPeriod' in attrs) { |
6a1aa64f DV |
2503 | this.rollPeriod_ = attrs.rollPeriod; |
2504 | } | |
c65f2303 | 2505 | if ('dateWindow' in attrs) { |
6a1aa64f DV |
2506 | this.dateWindow_ = attrs.dateWindow; |
2507 | } | |
c65f2303 | 2508 | if ('valueRange' in attrs) { |
6a1aa64f | 2509 | this.valueRange_ = attrs.valueRange; |
c65f2303 | 2510 | this.valueWindow_ = attrs.valueRange; |
6a1aa64f | 2511 | } |
450fe64b DV |
2512 | |
2513 | // TODO(danvk): validate per-series options. | |
46dde5f9 DV |
2514 | // Supported: |
2515 | // strokeWidth | |
2516 | // pointSize | |
2517 | // drawPoints | |
2518 | // highlightCircleSize | |
450fe64b | 2519 | |
fc80a396 | 2520 | Dygraph.update(this.user_attrs_, attrs); |
87bb7958 | 2521 | Dygraph.update(this.renderOptions_, attrs); |
285a6bda DV |
2522 | |
2523 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
2524 | ||
2525 | // TODO(danvk): this doesn't match the constructor logic | |
2526 | this.layout_.updateOptions({ 'errorBars': this.attr_("errorBars") }); | |
5e50289f | 2527 | if (attrs['file']) { |
6a1aa64f DV |
2528 | this.file_ = attrs['file']; |
2529 | this.start_(); | |
2530 | } else { | |
2531 | this.drawGraph_(this.rawData_); | |
2532 | } | |
2533 | }; | |
2534 | ||
2535 | /** | |
697e70b2 DV |
2536 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
2537 | * containing div (which has presumably changed size since the dygraph was | |
2538 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
2539 | * |
2540 | * This is far more efficient than destroying and re-instantiating a | |
2541 | * Dygraph, since it doesn't have to reparse the underlying data. | |
2542 | * | |
697e70b2 DV |
2543 | * @param {Number} width Width (in pixels) |
2544 | * @param {Number} height Height (in pixels) | |
2545 | */ | |
2546 | Dygraph.prototype.resize = function(width, height) { | |
e8c7ef86 DV |
2547 | if (this.resize_lock) { |
2548 | return; | |
2549 | } | |
2550 | this.resize_lock = true; | |
2551 | ||
697e70b2 DV |
2552 | if ((width === null) != (height === null)) { |
2553 | this.warn("Dygraph.resize() should be called with zero parameters or " + | |
2554 | "two non-NULL parameters. Pretending it was zero."); | |
2555 | width = height = null; | |
2556 | } | |
2557 | ||
b16e6369 | 2558 | // TODO(danvk): there should be a clear() method. |
697e70b2 | 2559 | this.maindiv_.innerHTML = ""; |
b16e6369 DV |
2560 | this.attrs_.labelsDiv = null; |
2561 | ||
697e70b2 DV |
2562 | if (width) { |
2563 | this.maindiv_.style.width = width + "px"; | |
2564 | this.maindiv_.style.height = height + "px"; | |
2565 | this.width_ = width; | |
2566 | this.height_ = height; | |
2567 | } else { | |
2568 | this.width_ = this.maindiv_.offsetWidth; | |
2569 | this.height_ = this.maindiv_.offsetHeight; | |
2570 | } | |
2571 | ||
2572 | this.createInterface_(); | |
964f30c6 | 2573 | this.drawGraph_(this.rawData_); |
e8c7ef86 DV |
2574 | |
2575 | this.resize_lock = false; | |
697e70b2 DV |
2576 | }; |
2577 | ||
2578 | /** | |
6a1aa64f DV |
2579 | * Adjusts the number of days in the rolling average. Updates the graph to |
2580 | * reflect the new averaging period. | |
2581 | * @param {Number} length Number of days over which to average the data. | |
2582 | */ | |
285a6bda | 2583 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f DV |
2584 | this.rollPeriod_ = length; |
2585 | this.drawGraph_(this.rawData_); | |
2586 | }; | |
540d00f1 | 2587 | |
f8cfec73 | 2588 | /** |
1cf11047 DV |
2589 | * Returns a boolean array of visibility statuses. |
2590 | */ | |
2591 | Dygraph.prototype.visibility = function() { | |
2592 | // Do lazy-initialization, so that this happens after we know the number of | |
2593 | // data series. | |
2594 | if (!this.attr_("visibility")) { | |
f38dec01 | 2595 | this.attrs_["visibility"] = []; |
1cf11047 DV |
2596 | } |
2597 | while (this.attr_("visibility").length < this.rawData_[0].length - 1) { | |
f38dec01 | 2598 | this.attr_("visibility").push(true); |
1cf11047 DV |
2599 | } |
2600 | return this.attr_("visibility"); | |
2601 | }; | |
2602 | ||
2603 | /** | |
2604 | * Changes the visiblity of a series. | |
2605 | */ | |
2606 | Dygraph.prototype.setVisibility = function(num, value) { | |
2607 | var x = this.visibility(); | |
2608 | if (num < 0 && num >= x.length) { | |
2609 | this.warn("invalid series number in setVisibility: " + num); | |
2610 | } else { | |
2611 | x[num] = value; | |
2612 | this.drawGraph_(this.rawData_); | |
2613 | } | |
2614 | }; | |
2615 | ||
2616 | /** | |
5c528fa2 DV |
2617 | * Update the list of annotations and redraw the chart. |
2618 | */ | |
a685723c | 2619 | Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { |
3c51ab74 DV |
2620 | // Only add the annotation CSS rule once we know it will be used. |
2621 | Dygraph.addAnnotationRule(); | |
5c528fa2 DV |
2622 | this.annotations_ = ann; |
2623 | this.layout_.setAnnotations(this.annotations_); | |
a685723c DV |
2624 | if (!suppressDraw) { |
2625 | this.drawGraph_(this.rawData_); | |
2626 | } | |
5c528fa2 DV |
2627 | }; |
2628 | ||
2629 | /** | |
2630 | * Return the list of annotations. | |
2631 | */ | |
2632 | Dygraph.prototype.annotations = function() { | |
2633 | return this.annotations_; | |
2634 | }; | |
2635 | ||
46dde5f9 DV |
2636 | /** |
2637 | * Get the index of a series (column) given its name. The first column is the | |
2638 | * x-axis, so the data series start with index 1. | |
2639 | */ | |
2640 | Dygraph.prototype.indexFromSetName = function(name) { | |
2641 | var labels = this.attr_("labels"); | |
2642 | for (var i = 0; i < labels.length; i++) { | |
2643 | if (labels[i] == name) return i; | |
2644 | } | |
2645 | return null; | |
2646 | }; | |
2647 | ||
5c528fa2 DV |
2648 | Dygraph.addAnnotationRule = function() { |
2649 | if (Dygraph.addedAnnotationCSS) return; | |
2650 | ||
18a016b1 DV |
2651 | var mysheet; |
2652 | if (document.styleSheets.length > 0) { | |
2653 | mysheet = document.styleSheets[0]; | |
2654 | } else { | |
2655 | var styleSheetElement = document.createElement("style"); | |
2656 | styleSheetElement.type = "text/css"; | |
2657 | document.getElementsByTagName("head")[0].appendChild(styleSheetElement); | |
2658 | for(i = 0; i < document.styleSheets.length; i++) { | |
2659 | if (document.styleSheets[i].disabled) continue; | |
2660 | mysheet = document.styleSheets[i]; | |
2661 | } | |
2662 | } | |
2663 | ||
5c528fa2 DV |
2664 | var rule = "border: 1px solid black; " + |
2665 | "background-color: white; " + | |
2666 | "text-align: center;"; | |
2667 | if (mysheet.insertRule) { // Firefox | |
52e266a3 DV |
2668 | var idx = mysheet.cssRules ? mysheet.cssRules.length : 0; |
2669 | mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", idx); | |
5c528fa2 DV |
2670 | } else if (mysheet.addRule) { // IE |
2671 | mysheet.addRule(".dygraphDefaultAnnotation", rule); | |
2672 | } | |
2673 | ||
2674 | Dygraph.addedAnnotationCSS = true; | |
2675 | } | |
2676 | ||
2677 | /** | |
f8cfec73 DV |
2678 | * Create a new canvas element. This is more complex than a simple |
2679 | * document.createElement("canvas") because of IE and excanvas. | |
2680 | */ | |
2681 | Dygraph.createCanvas = function() { | |
2682 | var canvas = document.createElement("canvas"); | |
2683 | ||
2684 | isIE = (/MSIE/.test(navigator.userAgent) && !window.opera); | |
8b8f2d59 | 2685 | if (isIE && (typeof(G_vmlCanvasManager) != 'undefined')) { |
f8cfec73 DV |
2686 | canvas = G_vmlCanvasManager.initElement(canvas); |
2687 | } | |
2688 | ||
2689 | return canvas; | |
2690 | }; | |
2691 | ||
540d00f1 DV |
2692 | |
2693 | /** | |
285a6bda | 2694 | * A wrapper around Dygraph that implements the gviz API. |
540d00f1 DV |
2695 | * @param {Object} container The DOM object the visualization should live in. |
2696 | */ | |
285a6bda | 2697 | Dygraph.GVizChart = function(container) { |
540d00f1 DV |
2698 | this.container = container; |
2699 | } | |
2700 | ||
285a6bda | 2701 | Dygraph.GVizChart.prototype.draw = function(data, options) { |
540d00f1 | 2702 | this.container.innerHTML = ''; |
285a6bda | 2703 | this.date_graph = new Dygraph(this.container, data, options); |
540d00f1 | 2704 | } |
285a6bda | 2705 | |
239c712d NAG |
2706 | /** |
2707 | * Google charts compatible setSelection | |
50360fd0 | 2708 | * Only row selection is supported, all points in the row will be highlighted |
239c712d NAG |
2709 | * @param {Array} array of the selected cells |
2710 | * @public | |
2711 | */ | |
2712 | Dygraph.GVizChart.prototype.setSelection = function(selection_array) { | |
2713 | var row = false; | |
2714 | if (selection_array.length) { | |
2715 | row = selection_array[0].row; | |
2716 | } | |
2717 | this.date_graph.setSelection(row); | |
2718 | } | |
2719 | ||
103b7292 NAG |
2720 | /** |
2721 | * Google charts compatible getSelection implementation | |
2722 | * @return {Array} array of the selected cells | |
2723 | * @public | |
2724 | */ | |
2725 | Dygraph.GVizChart.prototype.getSelection = function() { | |
2726 | var selection = []; | |
50360fd0 | 2727 | |
103b7292 | 2728 | var row = this.date_graph.getSelection(); |
50360fd0 | 2729 | |
103b7292 | 2730 | if (row < 0) return selection; |
50360fd0 | 2731 | |
103b7292 NAG |
2732 | col = 1; |
2733 | for (var i in this.date_graph.layout_.datasets) { | |
2734 | selection.push({row: row, column: col}); | |
2735 | col++; | |
2736 | } | |
2737 | ||
2738 | return selection; | |
2739 | } | |
2740 | ||
285a6bda DV |
2741 | // Older pages may still use this name. |
2742 | DateGraph = Dygraph; |