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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 | ||
129 | stepPlot: false | |
285a6bda DV |
130 | }; |
131 | ||
132 | // Various logging levels. | |
133 | Dygraph.DEBUG = 1; | |
134 | Dygraph.INFO = 2; | |
135 | Dygraph.WARNING = 3; | |
136 | Dygraph.ERROR = 3; | |
137 | ||
39b0e098 RK |
138 | // Directions for panning and zooming. Use bit operations when combined |
139 | // values are possible. | |
140 | Dygraph.HORIZONTAL = 1; | |
141 | Dygraph.VERTICAL = 2; | |
142 | ||
5c528fa2 DV |
143 | // Used for initializing annotation CSS rules only once. |
144 | Dygraph.addedAnnotationCSS = false; | |
145 | ||
285a6bda DV |
146 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { |
147 | // Labels is no longer a constructor parameter, since it's typically set | |
148 | // directly from the data source. It also conains a name for the x-axis, | |
149 | // which the previous constructor form did not. | |
150 | if (labels != null) { | |
151 | var new_labels = ["Date"]; | |
152 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); | |
fc80a396 | 153 | Dygraph.update(attrs, { 'labels': new_labels }); |
285a6bda DV |
154 | } |
155 | this.__init__(div, file, attrs); | |
8e4a6af3 DV |
156 | }; |
157 | ||
6a1aa64f | 158 | /** |
285a6bda | 159 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
6a1aa64f DV |
160 | * and interaction <canvas> inside of it. See the constructor for details |
161 | * on the parameters. | |
12e4c741 | 162 | * @param {Element} div the Element to render the graph into. |
6a1aa64f | 163 | * @param {String | Function} file Source data |
6a1aa64f DV |
164 | * @param {Object} attrs Miscellaneous other options |
165 | * @private | |
166 | */ | |
285a6bda DV |
167 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
168 | // Support two-argument constructor | |
169 | if (attrs == null) { attrs = {}; } | |
170 | ||
6a1aa64f | 171 | // Copy the important bits into the object |
32988383 | 172 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
6a1aa64f | 173 | this.maindiv_ = div; |
6a1aa64f | 174 | this.file_ = file; |
285a6bda | 175 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
6a1aa64f | 176 | this.previousVerticalX_ = -1; |
6a1aa64f | 177 | this.fractions_ = attrs.fractions || false; |
6a1aa64f | 178 | this.dateWindow_ = attrs.dateWindow || null; |
8b83c6cc RK |
179 | // valueRange and valueWindow are similar, but not the same. valueRange is a |
180 | // locally-stored copy of the attribute. valueWindow starts off the same as | |
181 | // valueRange but is impacted by zoom or pan effects. valueRange is kept | |
182 | // around to restore the original value back to valueRange. | |
6a1aa64f | 183 | this.valueRange_ = attrs.valueRange || null; |
8b83c6cc RK |
184 | this.valueWindow_ = this.valueRange_; |
185 | ||
6a1aa64f | 186 | this.wilsonInterval_ = attrs.wilsonInterval || true; |
fe0b7c03 | 187 | this.is_initial_draw_ = true; |
5c528fa2 | 188 | this.annotations_ = []; |
8e4a6af3 | 189 | |
f7d6278e DV |
190 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
191 | // div, then only one will be drawn. | |
192 | div.innerHTML = ""; | |
193 | ||
c21d2c2d | 194 | // If the div isn't already sized then inherit from our attrs or |
195 | // give it a default size. | |
285a6bda | 196 | if (div.style.width == '') { |
c21d2c2d | 197 | div.style.width = attrs.width || Dygraph.DEFAULT_WIDTH + "px"; |
285a6bda DV |
198 | } |
199 | if (div.style.height == '') { | |
c21d2c2d | 200 | div.style.height = attrs.height || Dygraph.DEFAULT_HEIGHT + "px"; |
32988383 | 201 | } |
285a6bda DV |
202 | this.width_ = parseInt(div.style.width, 10); |
203 | this.height_ = parseInt(div.style.height, 10); | |
c21d2c2d | 204 | // The div might have been specified as percent of the current window size, |
205 | // convert that to an appropriate number of pixels. | |
206 | if (div.style.width.indexOf("%") == div.style.width.length - 1) { | |
c6f45033 | 207 | this.width_ = div.offsetWidth; |
c21d2c2d | 208 | } |
209 | if (div.style.height.indexOf("%") == div.style.height.length - 1) { | |
c6f45033 | 210 | this.height_ = div.offsetHeight; |
c21d2c2d | 211 | } |
32988383 | 212 | |
10a6456d DV |
213 | if (this.width_ == 0) { |
214 | this.error("dygraph has zero width. Please specify a width in pixels."); | |
215 | } | |
216 | if (this.height_ == 0) { | |
217 | this.error("dygraph has zero height. Please specify a height in pixels."); | |
218 | } | |
219 | ||
344ba8c0 | 220 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
43af96e7 NK |
221 | if (attrs['stackedGraph']) { |
222 | attrs['fillGraph'] = true; | |
223 | // TODO(nikhilk): Add any other stackedGraph checks here. | |
224 | } | |
225 | ||
285a6bda DV |
226 | // Dygraphs has many options, some of which interact with one another. |
227 | // To keep track of everything, we maintain two sets of options: | |
228 | // | |
c21d2c2d | 229 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
230 | // this.attrs_ defaults, options derived from user_attrs_, data. |
231 | // | |
232 | // Options are then accessed this.attr_('attr'), which first looks at | |
233 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
234 | // defaults without overriding behavior that the user specifically asks for. | |
235 | this.user_attrs_ = {}; | |
fc80a396 | 236 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 237 | |
285a6bda | 238 | this.attrs_ = {}; |
fc80a396 | 239 | Dygraph.update(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 240 | |
16269f6e | 241 | this.boundaryIds_ = []; |
6a1aa64f | 242 | |
285a6bda DV |
243 | // Make a note of whether labels will be pulled from the CSV file. |
244 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
6a1aa64f | 245 | |
5c528fa2 DV |
246 | Dygraph.addAnnotationRule(); |
247 | ||
6a1aa64f DV |
248 | // Create the containing DIV and other interactive elements |
249 | this.createInterface_(); | |
250 | ||
738fc797 | 251 | this.start_(); |
6a1aa64f DV |
252 | }; |
253 | ||
285a6bda DV |
254 | Dygraph.prototype.attr_ = function(name) { |
255 | if (typeof(this.user_attrs_[name]) != 'undefined') { | |
256 | return this.user_attrs_[name]; | |
257 | } else if (typeof(this.attrs_[name]) != 'undefined') { | |
258 | return this.attrs_[name]; | |
259 | } else { | |
260 | return null; | |
261 | } | |
262 | }; | |
263 | ||
264 | // TODO(danvk): any way I can get the line numbers to be this.warn call? | |
265 | Dygraph.prototype.log = function(severity, message) { | |
266 | if (typeof(console) != 'undefined') { | |
267 | switch (severity) { | |
268 | case Dygraph.DEBUG: | |
269 | console.debug('dygraphs: ' + message); | |
270 | break; | |
271 | case Dygraph.INFO: | |
272 | console.info('dygraphs: ' + message); | |
273 | break; | |
274 | case Dygraph.WARNING: | |
275 | console.warn('dygraphs: ' + message); | |
276 | break; | |
277 | case Dygraph.ERROR: | |
278 | console.error('dygraphs: ' + message); | |
279 | break; | |
280 | } | |
281 | } | |
282 | } | |
283 | Dygraph.prototype.info = function(message) { | |
284 | this.log(Dygraph.INFO, message); | |
285 | } | |
286 | Dygraph.prototype.warn = function(message) { | |
287 | this.log(Dygraph.WARNING, message); | |
288 | } | |
289 | Dygraph.prototype.error = function(message) { | |
290 | this.log(Dygraph.ERROR, message); | |
291 | } | |
292 | ||
6a1aa64f DV |
293 | /** |
294 | * Returns the current rolling period, as set by the user or an option. | |
295 | * @return {Number} The number of days in the rolling window | |
296 | */ | |
285a6bda | 297 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 298 | return this.rollPeriod_; |
76171648 DV |
299 | }; |
300 | ||
599fb4ad DV |
301 | /** |
302 | * Returns the currently-visible x-range. This can be affected by zooming, | |
303 | * panning or a call to updateOptions. | |
304 | * Returns a two-element array: [left, right]. | |
305 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
306 | */ | |
307 | Dygraph.prototype.xAxisRange = function() { | |
308 | if (this.dateWindow_) return this.dateWindow_; | |
309 | ||
310 | // The entire chart is visible. | |
311 | var left = this.rawData_[0][0]; | |
312 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
313 | return [left, right]; | |
314 | }; | |
315 | ||
3230c662 DV |
316 | /** |
317 | * Returns the currently-visible y-range. This can be affected by zooming, | |
318 | * panning or a call to updateOptions. | |
319 | * Returns a two-element array: [bottom, top]. | |
320 | */ | |
321 | Dygraph.prototype.yAxisRange = function() { | |
322 | return this.displayedYRange_; | |
323 | }; | |
324 | ||
325 | /** | |
326 | * Convert from data coordinates to canvas/div X/Y coordinates. | |
327 | * Returns a two-element array: [X, Y] | |
328 | */ | |
329 | Dygraph.prototype.toDomCoords = function(x, y) { | |
330 | var ret = [null, null]; | |
331 | var area = this.plotter_.area; | |
332 | if (x !== null) { | |
333 | var xRange = this.xAxisRange(); | |
334 | ret[0] = area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; | |
335 | } | |
336 | ||
337 | if (y !== null) { | |
338 | var yRange = this.yAxisRange(); | |
891ad846 | 339 | ret[1] = area.y + (yRange[1] - y) / (yRange[1] - yRange[0]) * area.h; |
3230c662 DV |
340 | } |
341 | ||
342 | return ret; | |
343 | }; | |
344 | ||
56623f3b | 345 | // TODO(danvk): use these functions throughout dygraphs. |
3230c662 DV |
346 | /** |
347 | * Convert from canvas/div coords to data coordinates. | |
348 | * Returns a two-element array: [X, Y] | |
349 | */ | |
350 | Dygraph.prototype.toDataCoords = function(x, y) { | |
351 | var ret = [null, null]; | |
352 | var area = this.plotter_.area; | |
353 | if (x !== null) { | |
354 | var xRange = this.xAxisRange(); | |
355 | ret[0] = xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); | |
356 | } | |
357 | ||
358 | if (y !== null) { | |
359 | var yRange = this.yAxisRange(); | |
360 | ret[1] = yRange[0] + (area.h - y) / area.h * (yRange[1] - yRange[0]); | |
361 | } | |
362 | ||
363 | return ret; | |
364 | }; | |
365 | ||
e99fde05 DV |
366 | /** |
367 | * Returns the number of columns (including the independent variable). | |
368 | */ | |
369 | Dygraph.prototype.numColumns = function() { | |
370 | return this.rawData_[0].length; | |
371 | }; | |
372 | ||
373 | /** | |
374 | * Returns the number of rows (excluding any header/label row). | |
375 | */ | |
376 | Dygraph.prototype.numRows = function() { | |
377 | return this.rawData_.length; | |
378 | }; | |
379 | ||
380 | /** | |
381 | * Returns the value in the given row and column. If the row and column exceed | |
382 | * the bounds on the data, returns null. Also returns null if the value is | |
383 | * missing. | |
384 | */ | |
385 | Dygraph.prototype.getValue = function(row, col) { | |
386 | if (row < 0 || row > this.rawData_.length) return null; | |
387 | if (col < 0 || col > this.rawData_[row].length) return null; | |
388 | ||
389 | return this.rawData_[row][col]; | |
390 | }; | |
391 | ||
76171648 DV |
392 | Dygraph.addEvent = function(el, evt, fn) { |
393 | var normed_fn = function(e) { | |
394 | if (!e) var e = window.event; | |
395 | fn(e); | |
396 | }; | |
397 | if (window.addEventListener) { // Mozilla, Netscape, Firefox | |
398 | el.addEventListener(evt, normed_fn, false); | |
399 | } else { // IE | |
400 | el.attachEvent('on' + evt, normed_fn); | |
401 | } | |
402 | }; | |
6a1aa64f | 403 | |
4c47502d DV |
404 | Dygraph.clipCanvas_ = function(cnv, clip) { |
405 | var ctx = cnv.getContext("2d"); | |
406 | ctx.beginPath(); | |
407 | ctx.rect(clip.left, clip.top, clip.width, clip.height); | |
408 | ctx.clip(); | |
409 | }; | |
410 | ||
6a1aa64f | 411 | /** |
285a6bda | 412 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 413 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 414 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
415 | * @private |
416 | */ | |
285a6bda | 417 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
418 | // Create the all-enclosing graph div |
419 | var enclosing = this.maindiv_; | |
420 | ||
b0c3b730 DV |
421 | this.graphDiv = document.createElement("div"); |
422 | this.graphDiv.style.width = this.width_ + "px"; | |
423 | this.graphDiv.style.height = this.height_ + "px"; | |
424 | enclosing.appendChild(this.graphDiv); | |
425 | ||
4c47502d DV |
426 | var clip = { |
427 | top: 0, | |
428 | left: this.attr_("yAxisLabelWidth") + 2 * this.attr_("axisTickSize") | |
429 | }; | |
430 | clip.width = this.width_ - clip.left - this.attr_("rightGap"); | |
431 | clip.height = this.height_ - this.attr_("axisLabelFontSize") | |
432 | - 2 * this.attr_("axisTickSize"); | |
433 | this.clippingArea_ = clip; | |
434 | ||
b0c3b730 | 435 | // Create the canvas for interactive parts of the chart. |
f8cfec73 | 436 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 DV |
437 | this.canvas_.style.position = "absolute"; |
438 | this.canvas_.width = this.width_; | |
439 | this.canvas_.height = this.height_; | |
f8cfec73 DV |
440 | this.canvas_.style.width = this.width_ + "px"; // for IE |
441 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
b0c3b730 DV |
442 | |
443 | // ... and for static parts of the chart. | |
6a1aa64f | 444 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
76171648 | 445 | |
eb7bf005 EC |
446 | // The interactive parts of the graph are drawn on top of the chart. |
447 | this.graphDiv.appendChild(this.hidden_); | |
448 | this.graphDiv.appendChild(this.canvas_); | |
449 | this.mouseEventElement_ = this.canvas_; | |
450 | ||
4c47502d DV |
451 | // Make sure we don't overdraw. |
452 | Dygraph.clipCanvas_(this.hidden_, this.clippingArea_); | |
453 | Dygraph.clipCanvas_(this.canvas_, this.clippingArea_); | |
454 | ||
76171648 | 455 | var dygraph = this; |
eb7bf005 | 456 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(e) { |
76171648 DV |
457 | dygraph.mouseMove_(e); |
458 | }); | |
eb7bf005 | 459 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(e) { |
76171648 DV |
460 | dygraph.mouseOut_(e); |
461 | }); | |
697e70b2 DV |
462 | |
463 | // Create the grapher | |
464 | // TODO(danvk): why does the Layout need its own set of options? | |
465 | this.layoutOptions_ = { 'xOriginIsZero': false }; | |
466 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
467 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
468 | Dygraph.update(this.layoutOptions_, { | |
469 | 'errorBars': (this.attr_("errorBars") || this.attr_("customBars")) }); | |
470 | ||
471 | this.layout_ = new DygraphLayout(this, this.layoutOptions_); | |
472 | ||
473 | // TODO(danvk): why does the Renderer need its own set of options? | |
474 | this.renderOptions_ = { colorScheme: this.colors_, | |
475 | strokeColor: null, | |
476 | axisLineWidth: Dygraph.AXIS_LINE_WIDTH }; | |
477 | Dygraph.update(this.renderOptions_, this.attrs_); | |
478 | Dygraph.update(this.renderOptions_, this.user_attrs_); | |
479 | this.plotter_ = new DygraphCanvasRenderer(this, | |
480 | this.hidden_, this.layout_, | |
481 | this.renderOptions_); | |
482 | ||
483 | this.createStatusMessage_(); | |
484 | this.createRollInterface_(); | |
485 | this.createDragInterface_(); | |
4cfcc38c DV |
486 | }; |
487 | ||
488 | /** | |
489 | * Detach DOM elements in the dygraph and null out all data references. | |
490 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
491 | * usage. See, e.g., the tests/perf.html example. | |
492 | */ | |
493 | Dygraph.prototype.destroy = function() { | |
494 | var removeRecursive = function(node) { | |
495 | while (node.hasChildNodes()) { | |
496 | removeRecursive(node.firstChild); | |
497 | node.removeChild(node.firstChild); | |
498 | } | |
499 | }; | |
500 | removeRecursive(this.maindiv_); | |
501 | ||
502 | var nullOut = function(obj) { | |
503 | for (var n in obj) { | |
504 | if (typeof(obj[n]) === 'object') { | |
505 | obj[n] = null; | |
506 | } | |
507 | } | |
508 | }; | |
509 | ||
510 | // These may not all be necessary, but it can't hurt... | |
511 | nullOut(this.layout_); | |
512 | nullOut(this.plotter_); | |
513 | nullOut(this); | |
514 | }; | |
6a1aa64f DV |
515 | |
516 | /** | |
517 | * Creates the canvas containing the PlotKit graph. Only plotkit ever draws on | |
285a6bda | 518 | * this particular canvas. All Dygraph work is done on this.canvas_. |
8846615a | 519 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
520 | * @return {Object} The newly-created canvas |
521 | * @private | |
522 | */ | |
285a6bda | 523 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 | 524 | var h = Dygraph.createCanvas(); |
6a1aa64f | 525 | h.style.position = "absolute"; |
9ac5e4ae DV |
526 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
527 | // some extra area to make it easier to zoom in on the far left and far | |
528 | // right. h needs to be precisely the plot area, so that clipping occurs. | |
6a1aa64f DV |
529 | h.style.top = canvas.style.top; |
530 | h.style.left = canvas.style.left; | |
531 | h.width = this.width_; | |
532 | h.height = this.height_; | |
f8cfec73 DV |
533 | h.style.width = this.width_ + "px"; // for IE |
534 | h.style.height = this.height_ + "px"; // for IE | |
6a1aa64f DV |
535 | return h; |
536 | }; | |
537 | ||
f474c2a3 DV |
538 | // Taken from MochiKit.Color |
539 | Dygraph.hsvToRGB = function (hue, saturation, value) { | |
540 | var red; | |
541 | var green; | |
542 | var blue; | |
543 | if (saturation === 0) { | |
544 | red = value; | |
545 | green = value; | |
546 | blue = value; | |
547 | } else { | |
548 | var i = Math.floor(hue * 6); | |
549 | var f = (hue * 6) - i; | |
550 | var p = value * (1 - saturation); | |
551 | var q = value * (1 - (saturation * f)); | |
552 | var t = value * (1 - (saturation * (1 - f))); | |
553 | switch (i) { | |
554 | case 1: red = q; green = value; blue = p; break; | |
555 | case 2: red = p; green = value; blue = t; break; | |
556 | case 3: red = p; green = q; blue = value; break; | |
557 | case 4: red = t; green = p; blue = value; break; | |
558 | case 5: red = value; green = p; blue = q; break; | |
559 | case 6: // fall through | |
560 | case 0: red = value; green = t; blue = p; break; | |
561 | } | |
562 | } | |
563 | red = Math.floor(255 * red + 0.5); | |
564 | green = Math.floor(255 * green + 0.5); | |
565 | blue = Math.floor(255 * blue + 0.5); | |
566 | return 'rgb(' + red + ',' + green + ',' + blue + ')'; | |
567 | }; | |
568 | ||
569 | ||
6a1aa64f DV |
570 | /** |
571 | * Generate a set of distinct colors for the data series. This is done with a | |
572 | * color wheel. Saturation/Value are customizable, and the hue is | |
573 | * equally-spaced around the color wheel. If a custom set of colors is | |
574 | * specified, that is used instead. | |
6a1aa64f DV |
575 | * @private |
576 | */ | |
285a6bda DV |
577 | Dygraph.prototype.setColors_ = function() { |
578 | // TODO(danvk): compute this directly into this.attrs_['colorScheme'] and do | |
579 | // away with this.renderOptions_. | |
580 | var num = this.attr_("labels").length - 1; | |
6a1aa64f | 581 | this.colors_ = []; |
285a6bda DV |
582 | var colors = this.attr_('colors'); |
583 | if (!colors) { | |
584 | var sat = this.attr_('colorSaturation') || 1.0; | |
585 | var val = this.attr_('colorValue') || 0.5; | |
2aa21213 | 586 | var half = Math.ceil(num / 2); |
6a1aa64f | 587 | for (var i = 1; i <= num; i++) { |
ec1959eb | 588 | if (!this.visibility()[i-1]) continue; |
43af96e7 | 589 | // alternate colors for high contrast. |
2aa21213 | 590 | var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2); |
43af96e7 NK |
591 | var hue = (1.0 * idx/ (1 + num)); |
592 | this.colors_.push(Dygraph.hsvToRGB(hue, sat, val)); | |
6a1aa64f DV |
593 | } |
594 | } else { | |
595 | for (var i = 0; i < num; i++) { | |
ec1959eb | 596 | if (!this.visibility()[i]) continue; |
285a6bda | 597 | var colorStr = colors[i % colors.length]; |
f474c2a3 | 598 | this.colors_.push(colorStr); |
6a1aa64f DV |
599 | } |
600 | } | |
285a6bda | 601 | |
c21d2c2d | 602 | // TODO(danvk): update this w/r/t/ the new options system. |
285a6bda | 603 | this.renderOptions_.colorScheme = this.colors_; |
fc80a396 DV |
604 | Dygraph.update(this.plotter_.options, this.renderOptions_); |
605 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
606 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
6a1aa64f DV |
607 | } |
608 | ||
43af96e7 NK |
609 | /** |
610 | * Return the list of colors. This is either the list of colors passed in the | |
611 | * attributes, or the autogenerated list of rgb(r,g,b) strings. | |
612 | * @return {Array<string>} The list of colors. | |
613 | */ | |
614 | Dygraph.prototype.getColors = function() { | |
615 | return this.colors_; | |
616 | }; | |
617 | ||
5e60386d DV |
618 | // The following functions are from quirksmode.org with a modification for Safari from |
619 | // http://blog.firetree.net/2005/07/04/javascript-find-position/ | |
3df0ccf0 DV |
620 | // http://www.quirksmode.org/js/findpos.html |
621 | Dygraph.findPosX = function(obj) { | |
622 | var curleft = 0; | |
5e60386d | 623 | if(obj.offsetParent) |
50360fd0 | 624 | while(1) |
5e60386d | 625 | { |
3df0ccf0 | 626 | curleft += obj.offsetLeft; |
5e60386d DV |
627 | if(!obj.offsetParent) |
628 | break; | |
3df0ccf0 DV |
629 | obj = obj.offsetParent; |
630 | } | |
5e60386d | 631 | else if(obj.x) |
3df0ccf0 DV |
632 | curleft += obj.x; |
633 | return curleft; | |
634 | }; | |
c21d2c2d | 635 | |
3df0ccf0 DV |
636 | Dygraph.findPosY = function(obj) { |
637 | var curtop = 0; | |
5e60386d DV |
638 | if(obj.offsetParent) |
639 | while(1) | |
640 | { | |
3df0ccf0 | 641 | curtop += obj.offsetTop; |
5e60386d DV |
642 | if(!obj.offsetParent) |
643 | break; | |
3df0ccf0 DV |
644 | obj = obj.offsetParent; |
645 | } | |
5e60386d | 646 | else if(obj.y) |
3df0ccf0 DV |
647 | curtop += obj.y; |
648 | return curtop; | |
649 | }; | |
650 | ||
5e60386d | 651 | |
71a11a8e | 652 | |
6a1aa64f DV |
653 | /** |
654 | * Create the div that contains information on the selected point(s) | |
655 | * This goes in the top right of the canvas, unless an external div has already | |
656 | * been specified. | |
657 | * @private | |
658 | */ | |
fedbd797 | 659 | Dygraph.prototype.createStatusMessage_ = function() { |
660 | var userLabelsDiv = this.user_attrs_["labelsDiv"]; | |
661 | if (userLabelsDiv && null != userLabelsDiv | |
662 | && (typeof(userLabelsDiv) == "string" || userLabelsDiv instanceof String)) { | |
663 | this.user_attrs_["labelsDiv"] = document.getElementById(userLabelsDiv); | |
664 | } | |
285a6bda DV |
665 | if (!this.attr_("labelsDiv")) { |
666 | var divWidth = this.attr_('labelsDivWidth'); | |
b0c3b730 | 667 | var messagestyle = { |
6a1aa64f DV |
668 | "position": "absolute", |
669 | "fontSize": "14px", | |
670 | "zIndex": 10, | |
671 | "width": divWidth + "px", | |
672 | "top": "0px", | |
8846615a | 673 | "left": (this.width_ - divWidth - 2) + "px", |
6a1aa64f DV |
674 | "background": "white", |
675 | "textAlign": "left", | |
b0c3b730 | 676 | "overflow": "hidden"}; |
fc80a396 | 677 | Dygraph.update(messagestyle, this.attr_('labelsDivStyles')); |
b0c3b730 DV |
678 | var div = document.createElement("div"); |
679 | for (var name in messagestyle) { | |
85b99f0b DV |
680 | if (messagestyle.hasOwnProperty(name)) { |
681 | div.style[name] = messagestyle[name]; | |
682 | } | |
b0c3b730 DV |
683 | } |
684 | this.graphDiv.appendChild(div); | |
285a6bda | 685 | this.attrs_.labelsDiv = div; |
6a1aa64f DV |
686 | } |
687 | }; | |
688 | ||
689 | /** | |
690 | * Create the text box to adjust the averaging period | |
691 | * @return {Object} The newly-created text box | |
692 | * @private | |
693 | */ | |
285a6bda | 694 | Dygraph.prototype.createRollInterface_ = function() { |
285a6bda | 695 | var display = this.attr_('showRoller') ? "block" : "none"; |
b0c3b730 DV |
696 | var textAttr = { "position": "absolute", |
697 | "zIndex": 10, | |
698 | "top": (this.plotter_.area.h - 25) + "px", | |
699 | "left": (this.plotter_.area.x + 1) + "px", | |
700 | "display": display | |
6a1aa64f | 701 | }; |
b0c3b730 DV |
702 | var roller = document.createElement("input"); |
703 | roller.type = "text"; | |
704 | roller.size = "2"; | |
705 | roller.value = this.rollPeriod_; | |
706 | for (var name in textAttr) { | |
85b99f0b DV |
707 | if (textAttr.hasOwnProperty(name)) { |
708 | roller.style[name] = textAttr[name]; | |
709 | } | |
b0c3b730 DV |
710 | } |
711 | ||
6a1aa64f | 712 | var pa = this.graphDiv; |
b0c3b730 | 713 | pa.appendChild(roller); |
76171648 DV |
714 | var dygraph = this; |
715 | roller.onchange = function() { dygraph.adjustRoll(roller.value); }; | |
6a1aa64f | 716 | return roller; |
76171648 DV |
717 | }; |
718 | ||
719 | // These functions are taken from MochiKit.Signal | |
720 | Dygraph.pageX = function(e) { | |
721 | if (e.pageX) { | |
722 | return (!e.pageX || e.pageX < 0) ? 0 : e.pageX; | |
723 | } else { | |
724 | var de = document; | |
725 | var b = document.body; | |
726 | return e.clientX + | |
727 | (de.scrollLeft || b.scrollLeft) - | |
728 | (de.clientLeft || 0); | |
729 | } | |
730 | }; | |
731 | ||
732 | Dygraph.pageY = function(e) { | |
733 | if (e.pageY) { | |
734 | return (!e.pageY || e.pageY < 0) ? 0 : e.pageY; | |
735 | } else { | |
736 | var de = document; | |
737 | var b = document.body; | |
738 | return e.clientY + | |
739 | (de.scrollTop || b.scrollTop) - | |
740 | (de.clientTop || 0); | |
741 | } | |
742 | }; | |
6a1aa64f DV |
743 | |
744 | /** | |
745 | * Set up all the mouse handlers needed to capture dragging behavior for zoom | |
27385109 | 746 | * events. |
6a1aa64f DV |
747 | * @private |
748 | */ | |
285a6bda | 749 | Dygraph.prototype.createDragInterface_ = function() { |
6a1aa64f DV |
750 | var self = this; |
751 | ||
752 | // Tracks whether the mouse is down right now | |
bce01b0f | 753 | var isZooming = false; |
c776c216 | 754 | var isPanning = false; |
6a1aa64f DV |
755 | var dragStartX = null; |
756 | var dragStartY = null; | |
757 | var dragEndX = null; | |
758 | var dragEndY = null; | |
759 | var prevEndX = null; | |
8b83c6cc RK |
760 | var prevEndY = null; |
761 | var prevDragDirection = null; | |
e3489f4f RK |
762 | |
763 | // draggingDate and draggingValue represent the [date,value] point on the | |
764 | // graph at which the mouse was pressed. As the mouse moves while panning, | |
765 | // the viewport must pan so that the mouse position points to | |
766 | // [draggingDate, draggingValue] | |
bce01b0f | 767 | var draggingDate = null; |
e3489f4f RK |
768 | var draggingValue = null; |
769 | ||
770 | // The range in second/value units that the viewport encompasses during a | |
771 | // panning operation. | |
bce01b0f | 772 | var dateRange = null; |
e3489f4f | 773 | var valueRange = null; |
6a1aa64f DV |
774 | |
775 | // Utility function to convert page-wide coordinates to canvas coords | |
67e650dc DV |
776 | var px = 0; |
777 | var py = 0; | |
76171648 | 778 | var getX = function(e) { return Dygraph.pageX(e) - px }; |
1e1bf7df | 779 | var getY = function(e) { return Dygraph.pageY(e) - py }; |
6a1aa64f DV |
780 | |
781 | // Draw zoom rectangles when the mouse is down and the user moves around | |
eb7bf005 | 782 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(event) { |
bce01b0f | 783 | if (isZooming) { |
6a1aa64f DV |
784 | dragEndX = getX(event); |
785 | dragEndY = getY(event); | |
786 | ||
8b83c6cc RK |
787 | var xDelta = Math.abs(dragStartX - dragEndX); |
788 | var yDelta = Math.abs(dragStartY - dragEndY); | |
8b211dd6 RK |
789 | |
790 | // drag direction threshold for y axis is twice as large as x axis | |
791 | var dragDirection = (xDelta < yDelta / 2) ? Dygraph.VERTICAL : Dygraph.HORIZONTAL; | |
8b83c6cc RK |
792 | |
793 | self.drawZoomRect_(dragDirection, dragStartX, dragEndX, dragStartY, dragEndY, | |
794 | prevDragDirection, prevEndX, prevEndY); | |
795 | ||
6a1aa64f | 796 | prevEndX = dragEndX; |
8b83c6cc RK |
797 | prevEndY = dragEndY; |
798 | prevDragDirection = dragDirection; | |
bce01b0f DV |
799 | } else if (isPanning) { |
800 | dragEndX = getX(event); | |
801 | dragEndY = getY(event); | |
802 | ||
803 | // Want to have it so that: | |
e3489f4f | 804 | // 1. draggingDate appears at dragEndX, draggingValue appears at dragEndY. |
bce01b0f | 805 | // 2. daterange = (dateWindow_[1] - dateWindow_[0]) is unaltered. |
e3489f4f RK |
806 | // 3. draggingValue appears at dragEndY. |
807 | // 4. valueRange is unaltered. | |
808 | ||
809 | var minDate = draggingDate - (dragEndX / self.width_) * dateRange; | |
810 | var maxDate = minDate + dateRange; | |
811 | self.dateWindow_ = [minDate, maxDate]; | |
bce01b0f | 812 | |
e3489f4f RK |
813 | var maxValue = draggingValue + (dragEndY / self.height_) * valueRange; |
814 | var minValue = maxValue - valueRange; | |
815 | self.valueWindow_ = [ minValue, maxValue ]; | |
bce01b0f | 816 | self.drawGraph_(self.rawData_); |
6a1aa64f DV |
817 | } |
818 | }); | |
819 | ||
820 | // Track the beginning of drag events | |
eb7bf005 | 821 | Dygraph.addEvent(this.mouseEventElement_, 'mousedown', function(event) { |
3df0ccf0 DV |
822 | px = Dygraph.findPosX(self.canvas_); |
823 | py = Dygraph.findPosY(self.canvas_); | |
6a1aa64f DV |
824 | dragStartX = getX(event); |
825 | dragStartY = getY(event); | |
bce01b0f | 826 | |
2dab69c3 | 827 | if (event.altKey || event.shiftKey) { |
e3489f4f RK |
828 | // have to be zoomed in to pan. |
829 | if (!self.dateWindow_ && !self.valueWindow_) return; | |
830 | ||
bce01b0f | 831 | isPanning = true; |
e3489f4f RK |
832 | var xRange = self.xAxisRange(); |
833 | dateRange = xRange[1] - xRange[0]; | |
834 | var yRange = self.yAxisRange(); | |
835 | valueRange = yRange[1] - yRange[0]; | |
836 | ||
837 | // TODO(konigsberg): Switch from all this math to toDataCoords? | |
838 | // Seems to work for the dragging value. | |
d12999d3 | 839 | draggingDate = (dragStartX / self.width_) * dateRange + |
e3489f4f RK |
840 | xRange[0]; |
841 | var r = self.toDataCoords(null, dragStartY); | |
842 | draggingValue = r[1]; | |
bce01b0f DV |
843 | } else { |
844 | isZooming = true; | |
845 | } | |
6a1aa64f DV |
846 | }); |
847 | ||
848 | // If the user releases the mouse button during a drag, but not over the | |
849 | // canvas, then it doesn't count as a zooming action. | |
76171648 | 850 | Dygraph.addEvent(document, 'mouseup', function(event) { |
bce01b0f DV |
851 | if (isZooming || isPanning) { |
852 | isZooming = false; | |
6a1aa64f DV |
853 | dragStartX = null; |
854 | dragStartY = null; | |
855 | } | |
bce01b0f DV |
856 | |
857 | if (isPanning) { | |
858 | isPanning = false; | |
859 | draggingDate = null; | |
e3489f4f | 860 | draggingValue = null; |
bce01b0f | 861 | dateRange = null; |
e3489f4f | 862 | valueRange = null; |
bce01b0f | 863 | } |
6a1aa64f DV |
864 | }); |
865 | ||
866 | // Temporarily cancel the dragging event when the mouse leaves the graph | |
eb7bf005 | 867 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(event) { |
bce01b0f | 868 | if (isZooming) { |
6a1aa64f DV |
869 | dragEndX = null; |
870 | dragEndY = null; | |
871 | } | |
872 | }); | |
873 | ||
874 | // If the mouse is released on the canvas during a drag event, then it's a | |
875 | // zoom. Only do the zoom if it's over a large enough area (>= 10 pixels) | |
eb7bf005 | 876 | Dygraph.addEvent(this.mouseEventElement_, 'mouseup', function(event) { |
bce01b0f DV |
877 | if (isZooming) { |
878 | isZooming = false; | |
6a1aa64f DV |
879 | dragEndX = getX(event); |
880 | dragEndY = getY(event); | |
881 | var regionWidth = Math.abs(dragEndX - dragStartX); | |
882 | var regionHeight = Math.abs(dragEndY - dragStartY); | |
883 | ||
e2b5f2bc DV |
884 | if (regionWidth < 2 && regionHeight < 2 && |
885 | self.lastx_ != undefined && self.lastx_ != -1) { | |
2ad87eaa | 886 | // TODO(danvk): pass along more info about the points, e.g. 'x' |
1e1bf7df | 887 | if (self.attr_('clickCallback') != null) { |
1e1bf7df DV |
888 | self.attr_('clickCallback')(event, self.lastx_, self.selPoints_); |
889 | } | |
890 | if (self.attr_('pointClickCallback')) { | |
891 | // check if the click was on a particular point. | |
892 | var closestIdx = -1; | |
893 | var closestDistance = 0; | |
894 | for (var i = 0; i < self.selPoints_.length; i++) { | |
895 | var p = self.selPoints_[i]; | |
896 | var distance = Math.pow(p.canvasx - dragEndX, 2) + | |
897 | Math.pow(p.canvasy - dragEndY, 2); | |
898 | if (closestIdx == -1 || distance < closestDistance) { | |
899 | closestDistance = distance; | |
900 | closestIdx = i; | |
901 | } | |
902 | } | |
903 | ||
904 | // Allow any click within two pixels of the dot. | |
2ad87eaa | 905 | var radius = self.attr_('highlightCircleSize') + 2; |
1e1bf7df DV |
906 | if (closestDistance <= 5 * 5) { |
907 | self.attr_('pointClickCallback')(event, self.selPoints_[closestIdx]); | |
908 | } | |
909 | } | |
6a1aa64f DV |
910 | } |
911 | ||
8b83c6cc RK |
912 | if (regionWidth >= 10 && regionWidth > regionHeight) { |
913 | self.doZoomX_(Math.min(dragStartX, dragEndX), | |
6a1aa64f | 914 | Math.max(dragStartX, dragEndX)); |
8b83c6cc RK |
915 | } else if (regionHeight >= 10 && regionHeight > regionWidth){ |
916 | self.doZoomY_(Math.min(dragStartY, dragEndY), | |
917 | Math.max(dragStartY, dragEndY)); | |
6a1aa64f DV |
918 | } else { |
919 | self.canvas_.getContext("2d").clearRect(0, 0, | |
920 | self.canvas_.width, | |
921 | self.canvas_.height); | |
922 | } | |
923 | ||
924 | dragStartX = null; | |
925 | dragStartY = null; | |
926 | } | |
bce01b0f DV |
927 | |
928 | if (isPanning) { | |
929 | isPanning = false; | |
930 | draggingDate = null; | |
e3489f4f | 931 | draggingValue = null; |
bce01b0f | 932 | dateRange = null; |
e3489f4f | 933 | valueRange = null; |
bce01b0f | 934 | } |
6a1aa64f DV |
935 | }); |
936 | ||
937 | // Double-clicking zooms back out | |
eb7bf005 | 938 | Dygraph.addEvent(this.mouseEventElement_, 'dblclick', function(event) { |
8b83c6cc RK |
939 | // Disable zooming out if panning. |
940 | if (event.altKey || event.shiftKey) return; | |
941 | ||
942 | self.doUnzoom_(); | |
6a1aa64f DV |
943 | }); |
944 | }; | |
945 | ||
946 | /** | |
947 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
948 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
949 | * avoid extra redrawing, but it's tricky to avoid interactions with the status | |
950 | * dots. | |
8b83c6cc | 951 | * |
39b0e098 RK |
952 | * @param {Number} direction the direction of the zoom rectangle. Acceptable |
953 | * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL. | |
6a1aa64f DV |
954 | * @param {Number} startX The X position where the drag started, in canvas |
955 | * coordinates. | |
956 | * @param {Number} endX The current X position of the drag, in canvas coords. | |
8b83c6cc RK |
957 | * @param {Number} startY The Y position where the drag started, in canvas |
958 | * coordinates. | |
959 | * @param {Number} endY The current Y position of the drag, in canvas coords. | |
39b0e098 | 960 | * @param {Number} prevDirection the value of direction on the previous call to |
8b83c6cc | 961 | * this function. Used to avoid excess redrawing |
6a1aa64f DV |
962 | * @param {Number} prevEndX The value of endX on the previous call to this |
963 | * function. Used to avoid excess redrawing | |
8b83c6cc RK |
964 | * @param {Number} prevEndY The value of endY on the previous call to this |
965 | * function. Used to avoid excess redrawing | |
6a1aa64f DV |
966 | * @private |
967 | */ | |
8b83c6cc RK |
968 | Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY, endY, |
969 | prevDirection, prevEndX, prevEndY) { | |
6a1aa64f DV |
970 | var ctx = this.canvas_.getContext("2d"); |
971 | ||
972 | // Clean up from the previous rect if necessary | |
39b0e098 | 973 | if (prevDirection == Dygraph.HORIZONTAL) { |
6a1aa64f DV |
974 | ctx.clearRect(Math.min(startX, prevEndX), 0, |
975 | Math.abs(startX - prevEndX), this.height_); | |
39b0e098 | 976 | } else if (prevDirection == Dygraph.VERTICAL){ |
8b83c6cc RK |
977 | ctx.clearRect(0, Math.min(startY, prevEndY), |
978 | this.width_, Math.abs(startY - prevEndY)); | |
6a1aa64f DV |
979 | } |
980 | ||
981 | // Draw a light-grey rectangle to show the new viewing area | |
39b0e098 | 982 | if (direction == Dygraph.HORIZONTAL) { |
8b83c6cc RK |
983 | if (endX && startX) { |
984 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
985 | ctx.fillRect(Math.min(startX, endX), 0, | |
986 | Math.abs(endX - startX), this.height_); | |
987 | } | |
988 | } | |
39b0e098 | 989 | if (direction == Dygraph.VERTICAL) { |
8b83c6cc RK |
990 | if (endY && startY) { |
991 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
992 | ctx.fillRect(0, Math.min(startY, endY), | |
993 | this.width_, Math.abs(endY - startY)); | |
994 | } | |
6a1aa64f DV |
995 | } |
996 | }; | |
997 | ||
998 | /** | |
8b83c6cc RK |
999 | * Zoom to something containing [lowX, highX]. These are pixel coordinates in |
1000 | * the canvas. The exact zoom window may be slightly larger if there are no data | |
1001 | * points near lowX or highX. Don't confuse this function with doZoomXDates, | |
1002 | * which accepts dates that match the raw data. This function redraws the graph. | |
1003 | * | |
6a1aa64f DV |
1004 | * @param {Number} lowX The leftmost pixel value that should be visible. |
1005 | * @param {Number} highX The rightmost pixel value that should be visible. | |
1006 | * @private | |
1007 | */ | |
8b83c6cc | 1008 | Dygraph.prototype.doZoomX_ = function(lowX, highX) { |
6a1aa64f | 1009 | // Find the earliest and latest dates contained in this canvasx range. |
8b83c6cc | 1010 | // Convert the call to date ranges of the raw data. |
56623f3b DV |
1011 | var r = this.toDataCoords(lowX, null); |
1012 | var minDate = r[0]; | |
1013 | r = this.toDataCoords(highX, null); | |
1014 | var maxDate = r[0]; | |
8b83c6cc RK |
1015 | this.doZoomXDates_(minDate, maxDate); |
1016 | }; | |
6a1aa64f | 1017 | |
8b83c6cc RK |
1018 | /** |
1019 | * Zoom to something containing [minDate, maxDate] values. Don't confuse this | |
1020 | * method with doZoomX which accepts pixel coordinates. This function redraws | |
1021 | * the graph. | |
1022 | * | |
1023 | * @param {Number} minDate The minimum date that should be visible. | |
1024 | * @param {Number} maxDate The maximum date that should be visible. | |
1025 | * @private | |
1026 | */ | |
1027 | Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) { | |
6a1aa64f DV |
1028 | this.dateWindow_ = [minDate, maxDate]; |
1029 | this.drawGraph_(this.rawData_); | |
285a6bda | 1030 | if (this.attr_("zoomCallback")) { |
8b83c6cc RK |
1031 | var yRange = this.yAxisRange(); |
1032 | this.attr_("zoomCallback")(minDate, maxDate, yRange[0], yRange[1]); | |
1033 | } | |
1034 | }; | |
1035 | ||
1036 | /** | |
1037 | * Zoom to something containing [lowY, highY]. These are pixel coordinates in | |
1038 | * the canvas. The exact zoom window may be slightly larger if there are no | |
1039 | * data points near lowY or highY. Don't confuse this function with | |
1040 | * doZoomYValues, which accepts parameters that match the raw data. This | |
1041 | * function redraws the graph. | |
1042 | * | |
1043 | * @param {Number} lowY The topmost pixel value that should be visible. | |
1044 | * @param {Number} highY The lowest pixel value that should be visible. | |
1045 | * @private | |
1046 | */ | |
1047 | Dygraph.prototype.doZoomY_ = function(lowY, highY) { | |
1048 | // Find the highest and lowest values in pixel range. | |
1049 | var r = this.toDataCoords(null, lowY); | |
8b83c6cc | 1050 | var maxValue = r[1]; |
937029df RK |
1051 | r = this.toDataCoords(null, highY); |
1052 | var minValue = r[1]; | |
8b83c6cc RK |
1053 | |
1054 | this.doZoomYValues_(minValue, maxValue); | |
1055 | }; | |
1056 | ||
1057 | /** | |
1058 | * Zoom to something containing [minValue, maxValue] values. Don't confuse this | |
1059 | * method with doZoomY which accepts pixel coordinates. This function redraws | |
1060 | * the graph. | |
1061 | * | |
1062 | * @param {Number} minValue The minimum Value that should be visible. | |
1063 | * @param {Number} maxValue The maximum value that should be visible. | |
1064 | * @private | |
1065 | */ | |
1066 | Dygraph.prototype.doZoomYValues_ = function(minValue, maxValue) { | |
937029df | 1067 | this.valueWindow_ = [minValue, maxValue]; |
8b83c6cc RK |
1068 | this.drawGraph_(this.rawData_); |
1069 | if (this.attr_("zoomCallback")) { | |
1070 | var xRange = this.xAxisRange(); | |
1071 | this.attr_("zoomCallback")(xRange[0], xRange[1], minValue, maxValue); | |
1072 | } | |
1073 | }; | |
1074 | ||
1075 | /** | |
1076 | * Reset the zoom to the original view coordinates. This is the same as | |
1077 | * double-clicking on the graph. | |
1078 | * | |
1079 | * @private | |
1080 | */ | |
1081 | Dygraph.prototype.doUnzoom_ = function() { | |
1082 | var dirty = null; | |
1083 | if (this.dateWindow_ != null) { | |
1084 | dirty = 1; | |
1085 | this.dateWindow_ = null; | |
1086 | } | |
1087 | if (this.valueWindow_ != null) { | |
1088 | dirty = 1; | |
1089 | this.valueWindow_ = this.valueRange_; | |
1090 | } | |
1091 | ||
1092 | if (dirty) { | |
437c0979 RK |
1093 | // Putting the drawing operation before the callback because it resets |
1094 | // yAxisRange. | |
1095 | this.drawGraph_(this.rawData_); | |
8b83c6cc RK |
1096 | if (this.attr_("zoomCallback")) { |
1097 | var minDate = this.rawData_[0][0]; | |
1098 | var maxDate = this.rawData_[this.rawData_.length - 1][0]; | |
a2db51b5 RK |
1099 | var minValue = this.yAxisRange()[0]; |
1100 | var maxValue = this.yAxisRange()[1]; | |
8b83c6cc RK |
1101 | this.attr_("zoomCallback")(minDate, maxDate, minValue, maxValue); |
1102 | } | |
67e650dc | 1103 | } |
6a1aa64f DV |
1104 | }; |
1105 | ||
1106 | /** | |
1107 | * When the mouse moves in the canvas, display information about a nearby data | |
1108 | * point and draw dots over those points in the data series. This function | |
1109 | * takes care of cleanup of previously-drawn dots. | |
1110 | * @param {Object} event The mousemove event from the browser. | |
1111 | * @private | |
1112 | */ | |
285a6bda | 1113 | Dygraph.prototype.mouseMove_ = function(event) { |
eb7bf005 | 1114 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_); |
6a1aa64f DV |
1115 | var points = this.layout_.points; |
1116 | ||
1117 | var lastx = -1; | |
1118 | var lasty = -1; | |
1119 | ||
1120 | // Loop through all the points and find the date nearest to our current | |
1121 | // location. | |
1122 | var minDist = 1e+100; | |
1123 | var idx = -1; | |
1124 | for (var i = 0; i < points.length; i++) { | |
1125 | var dist = Math.abs(points[i].canvasx - canvasx); | |
f032c51d | 1126 | if (dist > minDist) continue; |
6a1aa64f DV |
1127 | minDist = dist; |
1128 | idx = i; | |
1129 | } | |
1130 | if (idx >= 0) lastx = points[idx].xval; | |
1131 | // Check that you can really highlight the last day's data | |
1132 | if (canvasx > points[points.length-1].canvasx) | |
1133 | lastx = points[points.length-1].xval; | |
1134 | ||
1135 | // Extract the points we've selected | |
b258a3da | 1136 | this.selPoints_ = []; |
50360fd0 | 1137 | var l = points.length; |
416b05ad NK |
1138 | if (!this.attr_("stackedGraph")) { |
1139 | for (var i = 0; i < l; i++) { | |
1140 | if (points[i].xval == lastx) { | |
1141 | this.selPoints_.push(points[i]); | |
1142 | } | |
1143 | } | |
1144 | } else { | |
354e15ab DE |
1145 | // Need to 'unstack' points starting from the bottom |
1146 | var cumulative_sum = 0; | |
416b05ad NK |
1147 | for (var i = l - 1; i >= 0; i--) { |
1148 | if (points[i].xval == lastx) { | |
354e15ab | 1149 | var p = {}; // Clone the point since we modify it |
d4139cd8 NK |
1150 | for (var k in points[i]) { |
1151 | p[k] = points[i][k]; | |
50360fd0 NK |
1152 | } |
1153 | p.yval -= cumulative_sum; | |
1154 | cumulative_sum += p.yval; | |
d4139cd8 | 1155 | this.selPoints_.push(p); |
12e4c741 | 1156 | } |
6a1aa64f | 1157 | } |
354e15ab | 1158 | this.selPoints_.reverse(); |
6a1aa64f DV |
1159 | } |
1160 | ||
b258a3da | 1161 | if (this.attr_("highlightCallback")) { |
a4c6a67c | 1162 | var px = this.lastx_; |
dd082dda | 1163 | if (px !== null && lastx != px) { |
344ba8c0 | 1164 | // only fire if the selected point has changed. |
50360fd0 | 1165 | this.attr_("highlightCallback")(event, lastx, this.selPoints_); |
43af96e7 | 1166 | } |
12e4c741 | 1167 | } |
43af96e7 | 1168 | |
239c712d NAG |
1169 | // Save last x position for callbacks. |
1170 | this.lastx_ = lastx; | |
50360fd0 | 1171 | |
239c712d NAG |
1172 | this.updateSelection_(); |
1173 | }; | |
b258a3da | 1174 | |
239c712d NAG |
1175 | /** |
1176 | * Draw dots over the selectied points in the data series. This function | |
1177 | * takes care of cleanup of previously-drawn dots. | |
1178 | * @private | |
1179 | */ | |
1180 | Dygraph.prototype.updateSelection_ = function() { | |
6a1aa64f | 1181 | // Clear the previously drawn vertical, if there is one |
285a6bda | 1182 | var circleSize = this.attr_('highlightCircleSize'); |
6a1aa64f DV |
1183 | var ctx = this.canvas_.getContext("2d"); |
1184 | if (this.previousVerticalX_ >= 0) { | |
1185 | var px = this.previousVerticalX_; | |
1186 | ctx.clearRect(px - circleSize - 1, 0, 2 * circleSize + 2, this.height_); | |
1187 | } | |
1188 | ||
584ceeaa DV |
1189 | var isOK = function(x) { return x && !isNaN(x); }; |
1190 | ||
d160cc3b | 1191 | if (this.selPoints_.length > 0) { |
b258a3da | 1192 | var canvasx = this.selPoints_[0].canvasx; |
6a1aa64f DV |
1193 | |
1194 | // Set the status message to indicate the selected point(s) | |
239c712d | 1195 | var replace = this.attr_('xValueFormatter')(this.lastx_, this) + ":"; |
50360fd0 | 1196 | var fmtFunc = this.attr_('yValueFormatter'); |
6a1aa64f | 1197 | var clen = this.colors_.length; |
d160cc3b NK |
1198 | |
1199 | if (this.attr_('showLabelsOnHighlight')) { | |
1200 | // Set the status message to indicate the selected point(s) | |
d160cc3b | 1201 | for (var i = 0; i < this.selPoints_.length; i++) { |
bcd3ebf0 | 1202 | if (!this.attr_("labelsShowZeroValues") && this.selPoints_[i].yval == 0) continue; |
d160cc3b NK |
1203 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
1204 | if (this.attr_("labelsSeparateLines")) { | |
1205 | replace += "<br/>"; | |
1206 | } | |
1207 | var point = this.selPoints_[i]; | |
1208 | var c = new RGBColor(this.colors_[i%clen]); | |
029da4b6 | 1209 | var yval = fmtFunc(point.yval); |
d160cc3b NK |
1210 | replace += " <b><font color='" + c.toHex() + "'>" |
1211 | + point.name + "</font></b>:" | |
1212 | + yval; | |
6a1aa64f | 1213 | } |
50360fd0 | 1214 | |
d160cc3b | 1215 | this.attr_("labelsDiv").innerHTML = replace; |
6a1aa64f | 1216 | } |
6a1aa64f | 1217 | |
6a1aa64f | 1218 | // Draw colored circles over the center of each selected point |
43af96e7 | 1219 | ctx.save(); |
b258a3da | 1220 | for (var i = 0; i < this.selPoints_.length; i++) { |
f032c51d | 1221 | if (!isOK(this.selPoints_[i].canvasy)) continue; |
6a1aa64f | 1222 | ctx.beginPath(); |
563c70ca | 1223 | ctx.fillStyle = this.plotter_.colors[this.selPoints_[i].name]; |
f032c51d | 1224 | ctx.arc(canvasx, this.selPoints_[i].canvasy, circleSize, |
7bf6a9fe | 1225 | 0, 2 * Math.PI, false); |
6a1aa64f DV |
1226 | ctx.fill(); |
1227 | } | |
1228 | ctx.restore(); | |
1229 | ||
1230 | this.previousVerticalX_ = canvasx; | |
1231 | } | |
1232 | }; | |
1233 | ||
1234 | /** | |
239c712d NAG |
1235 | * Set manually set selected dots, and display information about them |
1236 | * @param int row number that should by highlighted | |
1237 | * false value clears the selection | |
1238 | * @public | |
1239 | */ | |
1240 | Dygraph.prototype.setSelection = function(row) { | |
1241 | // Extract the points we've selected | |
1242 | this.selPoints_ = []; | |
1243 | var pos = 0; | |
50360fd0 | 1244 | |
239c712d | 1245 | if (row !== false) { |
16269f6e NAG |
1246 | row = row-this.boundaryIds_[0][0]; |
1247 | } | |
50360fd0 | 1248 | |
16269f6e | 1249 | if (row !== false && row >= 0) { |
239c712d | 1250 | for (var i in this.layout_.datasets) { |
16269f6e NAG |
1251 | if (row < this.layout_.datasets[i].length) { |
1252 | this.selPoints_.push(this.layout_.points[pos+row]); | |
1253 | } | |
239c712d NAG |
1254 | pos += this.layout_.datasets[i].length; |
1255 | } | |
16269f6e | 1256 | } |
50360fd0 | 1257 | |
16269f6e | 1258 | if (this.selPoints_.length) { |
239c712d NAG |
1259 | this.lastx_ = this.selPoints_[0].xval; |
1260 | this.updateSelection_(); | |
1261 | } else { | |
1262 | this.lastx_ = -1; | |
1263 | this.clearSelection(); | |
1264 | } | |
1265 | ||
1266 | }; | |
1267 | ||
1268 | /** | |
6a1aa64f DV |
1269 | * The mouse has left the canvas. Clear out whatever artifacts remain |
1270 | * @param {Object} event the mouseout event from the browser. | |
1271 | * @private | |
1272 | */ | |
285a6bda | 1273 | Dygraph.prototype.mouseOut_ = function(event) { |
a4c6a67c AV |
1274 | if (this.attr_("unhighlightCallback")) { |
1275 | this.attr_("unhighlightCallback")(event); | |
1276 | } | |
1277 | ||
43af96e7 | 1278 | if (this.attr_("hideOverlayOnMouseOut")) { |
239c712d | 1279 | this.clearSelection(); |
43af96e7 | 1280 | } |
6a1aa64f DV |
1281 | }; |
1282 | ||
239c712d NAG |
1283 | /** |
1284 | * Remove all selection from the canvas | |
1285 | * @public | |
1286 | */ | |
1287 | Dygraph.prototype.clearSelection = function() { | |
1288 | // Get rid of the overlay data | |
1289 | var ctx = this.canvas_.getContext("2d"); | |
1290 | ctx.clearRect(0, 0, this.width_, this.height_); | |
1291 | this.attr_("labelsDiv").innerHTML = ""; | |
1292 | this.selPoints_ = []; | |
1293 | this.lastx_ = -1; | |
1294 | } | |
1295 | ||
103b7292 NAG |
1296 | /** |
1297 | * Returns the number of the currently selected row | |
1298 | * @return int row number, of -1 if nothing is selected | |
1299 | * @public | |
1300 | */ | |
1301 | Dygraph.prototype.getSelection = function() { | |
1302 | if (!this.selPoints_ || this.selPoints_.length < 1) { | |
1303 | return -1; | |
1304 | } | |
50360fd0 | 1305 | |
103b7292 NAG |
1306 | for (var row=0; row<this.layout_.points.length; row++ ) { |
1307 | if (this.layout_.points[row].x == this.selPoints_[0].x) { | |
16269f6e | 1308 | return row + this.boundaryIds_[0][0]; |
103b7292 NAG |
1309 | } |
1310 | } | |
1311 | return -1; | |
1312 | } | |
1313 | ||
285a6bda | 1314 | Dygraph.zeropad = function(x) { |
32988383 DV |
1315 | if (x < 10) return "0" + x; else return "" + x; |
1316 | } | |
1317 | ||
6a1aa64f | 1318 | /** |
6b8e33dd DV |
1319 | * Return a string version of the hours, minutes and seconds portion of a date. |
1320 | * @param {Number} date The JavaScript date (ms since epoch) | |
1321 | * @return {String} A time of the form "HH:MM:SS" | |
1322 | * @private | |
1323 | */ | |
bf640e56 | 1324 | Dygraph.hmsString_ = function(date) { |
285a6bda | 1325 | var zeropad = Dygraph.zeropad; |
6b8e33dd DV |
1326 | var d = new Date(date); |
1327 | if (d.getSeconds()) { | |
1328 | return zeropad(d.getHours()) + ":" + | |
1329 | zeropad(d.getMinutes()) + ":" + | |
1330 | zeropad(d.getSeconds()); | |
6b8e33dd | 1331 | } else { |
054531ca | 1332 | return zeropad(d.getHours()) + ":" + zeropad(d.getMinutes()); |
6b8e33dd DV |
1333 | } |
1334 | } | |
1335 | ||
1336 | /** | |
bf640e56 AV |
1337 | * Convert a JS date to a string appropriate to display on an axis that |
1338 | * is displaying values at the stated granularity. | |
1339 | * @param {Date} date The date to format | |
1340 | * @param {Number} granularity One of the Dygraph granularity constants | |
1341 | * @return {String} The formatted date | |
1342 | * @private | |
1343 | */ | |
1344 | Dygraph.dateAxisFormatter = function(date, granularity) { | |
1345 | if (granularity >= Dygraph.MONTHLY) { | |
1346 | return date.strftime('%b %y'); | |
1347 | } else { | |
31eddad3 | 1348 | var frac = date.getHours() * 3600 + date.getMinutes() * 60 + date.getSeconds() + date.getMilliseconds(); |
bf640e56 AV |
1349 | if (frac == 0 || granularity >= Dygraph.DAILY) { |
1350 | return new Date(date.getTime() + 3600*1000).strftime('%d%b'); | |
1351 | } else { | |
1352 | return Dygraph.hmsString_(date.getTime()); | |
1353 | } | |
1354 | } | |
1355 | } | |
1356 | ||
1357 | /** | |
6a1aa64f DV |
1358 | * Convert a JS date (millis since epoch) to YYYY/MM/DD |
1359 | * @param {Number} date The JavaScript date (ms since epoch) | |
1360 | * @return {String} A date of the form "YYYY/MM/DD" | |
1361 | * @private | |
1362 | */ | |
285a6bda DV |
1363 | Dygraph.dateString_ = function(date, self) { |
1364 | var zeropad = Dygraph.zeropad; | |
6a1aa64f DV |
1365 | var d = new Date(date); |
1366 | ||
1367 | // Get the year: | |
1368 | var year = "" + d.getFullYear(); | |
1369 | // Get a 0 padded month string | |
6b8e33dd | 1370 | var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh |
6a1aa64f | 1371 | // Get a 0 padded day string |
6b8e33dd | 1372 | var day = zeropad(d.getDate()); |
6a1aa64f | 1373 | |
6b8e33dd DV |
1374 | var ret = ""; |
1375 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); | |
bf640e56 | 1376 | if (frac) ret = " " + Dygraph.hmsString_(date); |
6b8e33dd DV |
1377 | |
1378 | return year + "/" + month + "/" + day + ret; | |
6a1aa64f DV |
1379 | }; |
1380 | ||
1381 | /** | |
1382 | * Round a number to the specified number of digits past the decimal point. | |
1383 | * @param {Number} num The number to round | |
1384 | * @param {Number} places The number of decimals to which to round | |
1385 | * @return {Number} The rounded number | |
1386 | * @private | |
1387 | */ | |
029da4b6 | 1388 | Dygraph.round_ = function(num, places) { |
6a1aa64f DV |
1389 | var shift = Math.pow(10, places); |
1390 | return Math.round(num * shift)/shift; | |
1391 | }; | |
1392 | ||
1393 | /** | |
1394 | * Fires when there's data available to be graphed. | |
1395 | * @param {String} data Raw CSV data to be plotted | |
1396 | * @private | |
1397 | */ | |
285a6bda | 1398 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f DV |
1399 | this.rawData_ = this.parseCSV_(data); |
1400 | this.drawGraph_(this.rawData_); | |
1401 | }; | |
1402 | ||
285a6bda | 1403 | Dygraph.prototype.months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", |
8846615a | 1404 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]; |
285a6bda | 1405 | Dygraph.prototype.quarters = ["Jan", "Apr", "Jul", "Oct"]; |
6a1aa64f DV |
1406 | |
1407 | /** | |
1408 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
1409 | * @private | |
1410 | */ | |
285a6bda | 1411 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f DV |
1412 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
1413 | var startDate, endDate; | |
1414 | if (this.dateWindow_) { | |
1415 | startDate = this.dateWindow_[0]; | |
1416 | endDate = this.dateWindow_[1]; | |
1417 | } else { | |
1418 | startDate = this.rawData_[0][0]; | |
1419 | endDate = this.rawData_[this.rawData_.length - 1][0]; | |
1420 | } | |
1421 | ||
285a6bda | 1422 | var xTicks = this.attr_('xTicker')(startDate, endDate, this); |
6a1aa64f | 1423 | this.layout_.updateOptions({xTicks: xTicks}); |
32988383 DV |
1424 | }; |
1425 | ||
1426 | // Time granularity enumeration | |
285a6bda | 1427 | Dygraph.SECONDLY = 0; |
20a41c17 DV |
1428 | Dygraph.TWO_SECONDLY = 1; |
1429 | Dygraph.FIVE_SECONDLY = 2; | |
1430 | Dygraph.TEN_SECONDLY = 3; | |
1431 | Dygraph.THIRTY_SECONDLY = 4; | |
1432 | Dygraph.MINUTELY = 5; | |
1433 | Dygraph.TWO_MINUTELY = 6; | |
1434 | Dygraph.FIVE_MINUTELY = 7; | |
1435 | Dygraph.TEN_MINUTELY = 8; | |
1436 | Dygraph.THIRTY_MINUTELY = 9; | |
1437 | Dygraph.HOURLY = 10; | |
1438 | Dygraph.TWO_HOURLY = 11; | |
1439 | Dygraph.SIX_HOURLY = 12; | |
1440 | Dygraph.DAILY = 13; | |
1441 | Dygraph.WEEKLY = 14; | |
1442 | Dygraph.MONTHLY = 15; | |
1443 | Dygraph.QUARTERLY = 16; | |
1444 | Dygraph.BIANNUAL = 17; | |
1445 | Dygraph.ANNUAL = 18; | |
1446 | Dygraph.DECADAL = 19; | |
1447 | Dygraph.NUM_GRANULARITIES = 20; | |
285a6bda DV |
1448 | |
1449 | Dygraph.SHORT_SPACINGS = []; | |
1450 | Dygraph.SHORT_SPACINGS[Dygraph.SECONDLY] = 1000 * 1; | |
20a41c17 DV |
1451 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_SECONDLY] = 1000 * 2; |
1452 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_SECONDLY] = 1000 * 5; | |
285a6bda DV |
1453 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_SECONDLY] = 1000 * 10; |
1454 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_SECONDLY] = 1000 * 30; | |
1455 | Dygraph.SHORT_SPACINGS[Dygraph.MINUTELY] = 1000 * 60; | |
20a41c17 DV |
1456 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_MINUTELY] = 1000 * 60 * 2; |
1457 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_MINUTELY] = 1000 * 60 * 5; | |
285a6bda DV |
1458 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_MINUTELY] = 1000 * 60 * 10; |
1459 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_MINUTELY] = 1000 * 60 * 30; | |
1460 | Dygraph.SHORT_SPACINGS[Dygraph.HOURLY] = 1000 * 3600; | |
20a41c17 | 1461 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_HOURLY] = 1000 * 3600 * 2; |
805d5519 | 1462 | Dygraph.SHORT_SPACINGS[Dygraph.SIX_HOURLY] = 1000 * 3600 * 6; |
285a6bda DV |
1463 | Dygraph.SHORT_SPACINGS[Dygraph.DAILY] = 1000 * 86400; |
1464 | Dygraph.SHORT_SPACINGS[Dygraph.WEEKLY] = 1000 * 604800; | |
32988383 DV |
1465 | |
1466 | // NumXTicks() | |
1467 | // | |
1468 | // If we used this time granularity, how many ticks would there be? | |
1469 | // This is only an approximation, but it's generally good enough. | |
1470 | // | |
285a6bda DV |
1471 | Dygraph.prototype.NumXTicks = function(start_time, end_time, granularity) { |
1472 | if (granularity < Dygraph.MONTHLY) { | |
32988383 | 1473 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1474 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
32988383 DV |
1475 | return Math.floor(0.5 + 1.0 * (end_time - start_time) / spacing); |
1476 | } else { | |
1477 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1478 | var num_months = 12; | |
285a6bda DV |
1479 | if (granularity == Dygraph.QUARTERLY) num_months = 3; |
1480 | if (granularity == Dygraph.BIANNUAL) num_months = 2; | |
1481 | if (granularity == Dygraph.ANNUAL) num_months = 1; | |
1482 | if (granularity == Dygraph.DECADAL) { num_months = 1; year_mod = 10; } | |
32988383 DV |
1483 | |
1484 | var msInYear = 365.2524 * 24 * 3600 * 1000; | |
1485 | var num_years = 1.0 * (end_time - start_time) / msInYear; | |
1486 | return Math.floor(0.5 + 1.0 * num_years * num_months / year_mod); | |
1487 | } | |
1488 | }; | |
1489 | ||
1490 | // GetXAxis() | |
1491 | // | |
1492 | // Construct an x-axis of nicely-formatted times on meaningful boundaries | |
1493 | // (e.g. 'Jan 09' rather than 'Jan 22, 2009'). | |
1494 | // | |
1495 | // Returns an array containing {v: millis, label: label} dictionaries. | |
1496 | // | |
285a6bda | 1497 | Dygraph.prototype.GetXAxis = function(start_time, end_time, granularity) { |
bf640e56 | 1498 | var formatter = this.attr_("xAxisLabelFormatter"); |
32988383 | 1499 | var ticks = []; |
285a6bda | 1500 | if (granularity < Dygraph.MONTHLY) { |
32988383 | 1501 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1502 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
3d29302c | 1503 | var format = '%d%b'; // e.g. "1Jan" |
076c9622 DV |
1504 | |
1505 | // Find a time less than start_time which occurs on a "nice" time boundary | |
1506 | // for this granularity. | |
1507 | var g = spacing / 1000; | |
076c9622 DV |
1508 | var d = new Date(start_time); |
1509 | if (g <= 60) { // seconds | |
1510 | var x = d.getSeconds(); d.setSeconds(x - x % g); | |
1511 | } else { | |
1512 | d.setSeconds(0); | |
1513 | g /= 60; | |
1514 | if (g <= 60) { // minutes | |
1515 | var x = d.getMinutes(); d.setMinutes(x - x % g); | |
1516 | } else { | |
1517 | d.setMinutes(0); | |
1518 | g /= 60; | |
1519 | ||
1520 | if (g <= 24) { // days | |
1521 | var x = d.getHours(); d.setHours(x - x % g); | |
1522 | } else { | |
1523 | d.setHours(0); | |
1524 | g /= 24; | |
1525 | ||
1526 | if (g == 7) { // one week | |
20a41c17 | 1527 | d.setDate(d.getDate() - d.getDay()); |
076c9622 DV |
1528 | } |
1529 | } | |
1530 | } | |
328bb812 | 1531 | } |
076c9622 DV |
1532 | start_time = d.getTime(); |
1533 | ||
32988383 | 1534 | for (var t = start_time; t <= end_time; t += spacing) { |
bf640e56 | 1535 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1536 | } |
1537 | } else { | |
1538 | // Display a tick mark on the first of a set of months of each year. | |
1539 | // Years get a tick mark iff y % year_mod == 0. This is useful for | |
1540 | // displaying a tick mark once every 10 years, say, on long time scales. | |
1541 | var months; | |
1542 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1543 | ||
285a6bda | 1544 | if (granularity == Dygraph.MONTHLY) { |
32988383 | 1545 | months = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ]; |
285a6bda | 1546 | } else if (granularity == Dygraph.QUARTERLY) { |
32988383 | 1547 | months = [ 0, 3, 6, 9 ]; |
285a6bda | 1548 | } else if (granularity == Dygraph.BIANNUAL) { |
32988383 | 1549 | months = [ 0, 6 ]; |
285a6bda | 1550 | } else if (granularity == Dygraph.ANNUAL) { |
32988383 | 1551 | months = [ 0 ]; |
285a6bda | 1552 | } else if (granularity == Dygraph.DECADAL) { |
32988383 DV |
1553 | months = [ 0 ]; |
1554 | year_mod = 10; | |
1555 | } | |
1556 | ||
1557 | var start_year = new Date(start_time).getFullYear(); | |
1558 | var end_year = new Date(end_time).getFullYear(); | |
285a6bda | 1559 | var zeropad = Dygraph.zeropad; |
32988383 DV |
1560 | for (var i = start_year; i <= end_year; i++) { |
1561 | if (i % year_mod != 0) continue; | |
1562 | for (var j = 0; j < months.length; j++) { | |
1563 | var date_str = i + "/" + zeropad(1 + months[j]) + "/01"; | |
1564 | var t = Date.parse(date_str); | |
1565 | if (t < start_time || t > end_time) continue; | |
bf640e56 | 1566 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1567 | } |
1568 | } | |
1569 | } | |
1570 | ||
1571 | return ticks; | |
1572 | }; | |
1573 | ||
6a1aa64f DV |
1574 | |
1575 | /** | |
1576 | * Add ticks to the x-axis based on a date range. | |
1577 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1578 | * @param {Number} endDate End of the date window (millis since epoch) | |
1579 | * @return {Array.<Object>} Array of {label, value} tuples. | |
1580 | * @public | |
1581 | */ | |
285a6bda | 1582 | Dygraph.dateTicker = function(startDate, endDate, self) { |
32988383 | 1583 | var chosen = -1; |
285a6bda DV |
1584 | for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) { |
1585 | var num_ticks = self.NumXTicks(startDate, endDate, i); | |
1586 | if (self.width_ / num_ticks >= self.attr_('pixelsPerXLabel')) { | |
32988383 DV |
1587 | chosen = i; |
1588 | break; | |
2769de62 | 1589 | } |
6a1aa64f DV |
1590 | } |
1591 | ||
32988383 | 1592 | if (chosen >= 0) { |
285a6bda | 1593 | return self.GetXAxis(startDate, endDate, chosen); |
6a1aa64f | 1594 | } else { |
32988383 | 1595 | // TODO(danvk): signal error. |
6a1aa64f | 1596 | } |
6a1aa64f DV |
1597 | }; |
1598 | ||
1599 | /** | |
1600 | * Add ticks when the x axis has numbers on it (instead of dates) | |
1601 | * @param {Number} startDate Start of the date window (millis since epoch) | |
1602 | * @param {Number} endDate End of the date window (millis since epoch) | |
1603 | * @return {Array.<Object>} Array of {label, value} tuples. | |
1604 | * @public | |
1605 | */ | |
285a6bda | 1606 | Dygraph.numericTicks = function(minV, maxV, self) { |
c6336f04 DV |
1607 | // Basic idea: |
1608 | // Try labels every 1, 2, 5, 10, 20, 50, 100, etc. | |
1609 | // Calculate the resulting tick spacing (i.e. this.height_ / nTicks). | |
285a6bda | 1610 | // The first spacing greater than pixelsPerYLabel is what we use. |
ff00d3e2 | 1611 | // TODO(danvk): version that works on a log scale. |
f09e46d4 DV |
1612 | if (self.attr_("labelsKMG2")) { |
1613 | var mults = [1, 2, 4, 8]; | |
1614 | } else { | |
1615 | var mults = [1, 2, 5]; | |
1616 | } | |
c6336f04 | 1617 | var scale, low_val, high_val, nTicks; |
285a6bda DV |
1618 | // TODO(danvk): make it possible to set this for x- and y-axes independently. |
1619 | var pixelsPerTick = self.attr_('pixelsPerYLabel'); | |
c6336f04 | 1620 | for (var i = -10; i < 50; i++) { |
f09e46d4 DV |
1621 | if (self.attr_("labelsKMG2")) { |
1622 | var base_scale = Math.pow(16, i); | |
1623 | } else { | |
1624 | var base_scale = Math.pow(10, i); | |
1625 | } | |
c6336f04 DV |
1626 | for (var j = 0; j < mults.length; j++) { |
1627 | scale = base_scale * mults[j]; | |
c6336f04 DV |
1628 | low_val = Math.floor(minV / scale) * scale; |
1629 | high_val = Math.ceil(maxV / scale) * scale; | |
48a0ac91 | 1630 | nTicks = Math.abs(high_val - low_val) / scale; |
285a6bda | 1631 | var spacing = self.height_ / nTicks; |
c6336f04 | 1632 | // wish I could break out of both loops at once... |
285a6bda | 1633 | if (spacing > pixelsPerTick) break; |
c6336f04 | 1634 | } |
285a6bda | 1635 | if (spacing > pixelsPerTick) break; |
6a1aa64f DV |
1636 | } |
1637 | ||
1638 | // Construct labels for the ticks | |
1639 | var ticks = []; | |
ed11be50 DV |
1640 | var k; |
1641 | var k_labels = []; | |
1642 | if (self.attr_("labelsKMB")) { | |
1643 | k = 1000; | |
1644 | k_labels = [ "K", "M", "B", "T" ]; | |
1645 | } | |
1646 | if (self.attr_("labelsKMG2")) { | |
1647 | if (k) self.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); | |
1648 | k = 1024; | |
1649 | k_labels = [ "k", "M", "G", "T" ]; | |
1650 | } | |
1651 | ||
e21e69e2 | 1652 | // Allow reverse y-axis if it's explicitly requested. |
be7cdb11 | 1653 | if (low_val > high_val) scale *= -1; |
48a0ac91 | 1654 | |
c6336f04 DV |
1655 | for (var i = 0; i < nTicks; i++) { |
1656 | var tickV = low_val + i * scale; | |
0af6e346 | 1657 | var absTickV = Math.abs(tickV); |
029da4b6 | 1658 | var label = Dygraph.round_(tickV, 2); |
ed11be50 DV |
1659 | if (k_labels.length) { |
1660 | // Round up to an appropriate unit. | |
1661 | var n = k*k*k*k; | |
1662 | for (var j = 3; j >= 0; j--, n /= k) { | |
1663 | if (absTickV >= n) { | |
029da4b6 | 1664 | label = Dygraph.round_(tickV / n, 1) + k_labels[j]; |
ed11be50 DV |
1665 | break; |
1666 | } | |
afefbcdb | 1667 | } |
6a1aa64f DV |
1668 | } |
1669 | ticks.push( {label: label, v: tickV} ); | |
1670 | } | |
1671 | return ticks; | |
1672 | }; | |
1673 | ||
1674 | /** | |
1675 | * Adds appropriate ticks on the y-axis | |
1676 | * @param {Number} minY The minimum Y value in the data set | |
1677 | * @param {Number} maxY The maximum Y value in the data set | |
1678 | * @private | |
1679 | */ | |
285a6bda | 1680 | Dygraph.prototype.addYTicks_ = function(minY, maxY) { |
6a1aa64f | 1681 | // Set the number of ticks so that the labels are human-friendly. |
285a6bda DV |
1682 | // TODO(danvk): make this an attribute as well. |
1683 | var ticks = Dygraph.numericTicks(minY, maxY, this); | |
6a1aa64f DV |
1684 | this.layout_.updateOptions( { yAxis: [minY, maxY], |
1685 | yTicks: ticks } ); | |
1686 | }; | |
1687 | ||
5011e7a1 DV |
1688 | // Computes the range of the data series (including confidence intervals). |
1689 | // series is either [ [x1, y1], [x2, y2], ... ] or | |
1690 | // [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... | |
1691 | // Returns [low, high] | |
1692 | Dygraph.prototype.extremeValues_ = function(series) { | |
1693 | var minY = null, maxY = null; | |
1694 | ||
9922b78b | 1695 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
5011e7a1 DV |
1696 | if (bars) { |
1697 | // With custom bars, maxY is the max of the high values. | |
1698 | for (var j = 0; j < series.length; j++) { | |
1699 | var y = series[j][1][0]; | |
1700 | if (!y) continue; | |
1701 | var low = y - series[j][1][1]; | |
1702 | var high = y + series[j][1][2]; | |
1703 | if (low > y) low = y; // this can happen with custom bars, | |
1704 | if (high < y) high = y; // e.g. in tests/custom-bars.html | |
1705 | if (maxY == null || high > maxY) { | |
1706 | maxY = high; | |
1707 | } | |
1708 | if (minY == null || low < minY) { | |
1709 | minY = low; | |
1710 | } | |
1711 | } | |
1712 | } else { | |
1713 | for (var j = 0; j < series.length; j++) { | |
1714 | var y = series[j][1]; | |
d12999d3 | 1715 | if (y === null || isNaN(y)) continue; |
5011e7a1 DV |
1716 | if (maxY == null || y > maxY) { |
1717 | maxY = y; | |
1718 | } | |
1719 | if (minY == null || y < minY) { | |
1720 | minY = y; | |
1721 | } | |
1722 | } | |
1723 | } | |
1724 | ||
1725 | return [minY, maxY]; | |
1726 | }; | |
1727 | ||
6a1aa64f DV |
1728 | /** |
1729 | * Update the graph with new data. Data is in the format | |
1730 | * [ [date1, val1, val2, ...], [date2, val1, val2, ...] if errorBars=false | |
1731 | * or, if errorBars=true, | |
1732 | * [ [date1, [val1,stddev1], [val2,stddev2], ...], [date2, ...], ...] | |
1733 | * @param {Array.<Object>} data The data (see above) | |
1734 | * @private | |
1735 | */ | |
285a6bda | 1736 | Dygraph.prototype.drawGraph_ = function(data) { |
fe0b7c03 DV |
1737 | // This is used to set the second parameter to drawCallback, below. |
1738 | var is_initial_draw = this.is_initial_draw_; | |
1739 | this.is_initial_draw_ = false; | |
1740 | ||
3bd9c228 | 1741 | var minY = null, maxY = null; |
6a1aa64f | 1742 | this.layout_.removeAllDatasets(); |
285a6bda | 1743 | this.setColors_(); |
9317362d | 1744 | this.attrs_['pointSize'] = 0.5 * this.attr_('highlightCircleSize'); |
285a6bda | 1745 | |
f032c51d AV |
1746 | var connectSeparatedPoints = this.attr_('connectSeparatedPoints'); |
1747 | ||
354e15ab DE |
1748 | // Loop over the fields (series). Go from the last to the first, |
1749 | // because if they're stacked that's how we accumulate the values. | |
43af96e7 | 1750 | |
354e15ab DE |
1751 | var cumulative_y = []; // For stacked series. |
1752 | var datasets = []; | |
1753 | ||
1754 | // Loop over all fields and create datasets | |
1755 | for (var i = data[0].length - 1; i >= 1; i--) { | |
1cf11047 DV |
1756 | if (!this.visibility()[i - 1]) continue; |
1757 | ||
6a1aa64f DV |
1758 | var series = []; |
1759 | for (var j = 0; j < data.length; j++) { | |
4a634fc7 | 1760 | if (data[j][i] != null || !connectSeparatedPoints) { |
f032c51d | 1761 | var date = data[j][0]; |
563c70ca | 1762 | series.push([date, data[j][i]]); |
f032c51d | 1763 | } |
6a1aa64f DV |
1764 | } |
1765 | series = this.rollingAverage(series, this.rollPeriod_); | |
1766 | ||
1767 | // Prune down to the desired range, if necessary (for zooming) | |
1a26f3fb DV |
1768 | // Because there can be lines going to points outside of the visible area, |
1769 | // we actually prune to visible points, plus one on either side. | |
9922b78b | 1770 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
6a1aa64f DV |
1771 | if (this.dateWindow_) { |
1772 | var low = this.dateWindow_[0]; | |
1773 | var high= this.dateWindow_[1]; | |
1774 | var pruned = []; | |
1a26f3fb DV |
1775 | // TODO(danvk): do binary search instead of linear search. |
1776 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. | |
1777 | var firstIdx = null, lastIdx = null; | |
6a1aa64f | 1778 | for (var k = 0; k < series.length; k++) { |
1a26f3fb DV |
1779 | if (series[k][0] >= low && firstIdx === null) { |
1780 | firstIdx = k; | |
1781 | } | |
1782 | if (series[k][0] <= high) { | |
1783 | lastIdx = k; | |
6a1aa64f DV |
1784 | } |
1785 | } | |
1a26f3fb DV |
1786 | if (firstIdx === null) firstIdx = 0; |
1787 | if (firstIdx > 0) firstIdx--; | |
1788 | if (lastIdx === null) lastIdx = series.length - 1; | |
1789 | if (lastIdx < series.length - 1) lastIdx++; | |
16269f6e | 1790 | this.boundaryIds_[i-1] = [firstIdx, lastIdx]; |
1a26f3fb DV |
1791 | for (var k = firstIdx; k <= lastIdx; k++) { |
1792 | pruned.push(series[k]); | |
6a1aa64f DV |
1793 | } |
1794 | series = pruned; | |
16269f6e NAG |
1795 | } else { |
1796 | this.boundaryIds_[i-1] = [0, series.length-1]; | |
6a1aa64f DV |
1797 | } |
1798 | ||
648acd28 DV |
1799 | var extremes = this.extremeValues_(series); |
1800 | var thisMinY = extremes[0]; | |
1801 | var thisMaxY = extremes[1]; | |
61b78cd6 DV |
1802 | if (minY === null || thisMinY < minY) minY = thisMinY; |
1803 | if (maxY === null || thisMaxY > maxY) maxY = thisMaxY; | |
5011e7a1 | 1804 | |
6a1aa64f | 1805 | if (bars) { |
354e15ab DE |
1806 | for (var j=0; j<series.length; j++) { |
1807 | val = [series[j][0], series[j][1][0], series[j][1][1], series[j][1][2]]; | |
1808 | series[j] = val; | |
1809 | } | |
43af96e7 | 1810 | } else if (this.attr_("stackedGraph")) { |
43af96e7 NK |
1811 | var l = series.length; |
1812 | var actual_y; | |
1813 | for (var j = 0; j < l; j++) { | |
354e15ab DE |
1814 | // If one data set has a NaN, let all subsequent stacked |
1815 | // sets inherit the NaN -- only start at 0 for the first set. | |
1816 | var x = series[j][0]; | |
1817 | if (cumulative_y[x] === undefined) | |
1818 | cumulative_y[x] = 0; | |
43af96e7 NK |
1819 | |
1820 | actual_y = series[j][1]; | |
354e15ab | 1821 | cumulative_y[x] += actual_y; |
43af96e7 | 1822 | |
354e15ab | 1823 | series[j] = [x, cumulative_y[x]] |
43af96e7 | 1824 | |
354e15ab DE |
1825 | if (!maxY || cumulative_y[x] > maxY) |
1826 | maxY = cumulative_y[x]; | |
43af96e7 | 1827 | } |
6a1aa64f | 1828 | } |
354e15ab DE |
1829 | |
1830 | datasets[i] = series; | |
6a1aa64f DV |
1831 | } |
1832 | ||
354e15ab | 1833 | for (var i = 1; i < datasets.length; i++) { |
4523c1f6 | 1834 | if (!this.visibility()[i - 1]) continue; |
354e15ab | 1835 | this.layout_.addDataset(this.attr_("labels")[i], datasets[i]); |
43af96e7 NK |
1836 | } |
1837 | ||
6a1aa64f | 1838 | // Use some heuristics to come up with a good maxY value, unless it's been |
8b83c6cc RK |
1839 | // set explicitly by the developer or end-user (via drag) |
1840 | if (this.valueWindow_ != null) { | |
1841 | this.addYTicks_(this.valueWindow_[0], this.valueWindow_[1]); | |
1842 | this.displayedYRange_ = this.valueWindow_; | |
6a1aa64f | 1843 | } else { |
d053ab5a DV |
1844 | // This affects the calculation of span, below. |
1845 | if (this.attr_("includeZero") && minY > 0) { | |
1846 | minY = 0; | |
1847 | } | |
1848 | ||
6a1aa64f | 1849 | // Add some padding and round up to an integer to be human-friendly. |
3bd9c228 | 1850 | var span = maxY - minY; |
93dfacfd DV |
1851 | // special case: if we have no sense of scale, use +/-10% of the sole value. |
1852 | if (span == 0) { span = maxY; } | |
3bd9c228 DV |
1853 | var maxAxisY = maxY + 0.1 * span; |
1854 | var minAxisY = minY - 0.1 * span; | |
1855 | ||
1856 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. | |
ceb009dd DV |
1857 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; |
1858 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
3bd9c228 DV |
1859 | |
1860 | if (this.attr_("includeZero")) { | |
1861 | if (maxY < 0) maxAxisY = 0; | |
1862 | if (minY > 0) minAxisY = 0; | |
1863 | } | |
1864 | ||
1865 | this.addYTicks_(minAxisY, maxAxisY); | |
3230c662 | 1866 | this.displayedYRange_ = [minAxisY, maxAxisY]; |
6a1aa64f DV |
1867 | } |
1868 | ||
1869 | this.addXTicks_(); | |
1870 | ||
1871 | // Tell PlotKit to use this new data and render itself | |
d033ae1c | 1872 | this.layout_.updateOptions({dateWindow: this.dateWindow_}); |
6a1aa64f DV |
1873 | this.layout_.evaluateWithError(); |
1874 | this.plotter_.clear(); | |
1875 | this.plotter_.render(); | |
f6401bf6 DV |
1876 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
1877 | this.canvas_.height); | |
599fb4ad DV |
1878 | |
1879 | if (this.attr_("drawCallback") !== null) { | |
fe0b7c03 | 1880 | this.attr_("drawCallback")(this, is_initial_draw); |
599fb4ad | 1881 | } |
6a1aa64f DV |
1882 | }; |
1883 | ||
1884 | /** | |
1885 | * Calculates the rolling average of a data set. | |
1886 | * If originalData is [label, val], rolls the average of those. | |
1887 | * If originalData is [label, [, it's interpreted as [value, stddev] | |
1888 | * and the roll is returned in the same form, with appropriately reduced | |
1889 | * stddev for each value. | |
1890 | * Note that this is where fractional input (i.e. '5/10') is converted into | |
1891 | * decimal values. | |
1892 | * @param {Array} originalData The data in the appropriate format (see above) | |
1893 | * @param {Number} rollPeriod The number of days over which to average the data | |
1894 | */ | |
285a6bda | 1895 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
6a1aa64f DV |
1896 | if (originalData.length < 2) |
1897 | return originalData; | |
1898 | var rollPeriod = Math.min(rollPeriod, originalData.length - 1); | |
1899 | var rollingData = []; | |
285a6bda | 1900 | var sigma = this.attr_("sigma"); |
6a1aa64f DV |
1901 | |
1902 | if (this.fractions_) { | |
1903 | var num = 0; | |
1904 | var den = 0; // numerator/denominator | |
1905 | var mult = 100.0; | |
1906 | for (var i = 0; i < originalData.length; i++) { | |
1907 | num += originalData[i][1][0]; | |
1908 | den += originalData[i][1][1]; | |
1909 | if (i - rollPeriod >= 0) { | |
1910 | num -= originalData[i - rollPeriod][1][0]; | |
1911 | den -= originalData[i - rollPeriod][1][1]; | |
1912 | } | |
1913 | ||
1914 | var date = originalData[i][0]; | |
1915 | var value = den ? num / den : 0.0; | |
285a6bda | 1916 | if (this.attr_("errorBars")) { |
6a1aa64f DV |
1917 | if (this.wilsonInterval_) { |
1918 | // For more details on this confidence interval, see: | |
1919 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval | |
1920 | if (den) { | |
1921 | var p = value < 0 ? 0 : value, n = den; | |
1922 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); | |
1923 | var denom = 1 + sigma * sigma / den; | |
1924 | var low = (p + sigma * sigma / (2 * den) - pm) / denom; | |
1925 | var high = (p + sigma * sigma / (2 * den) + pm) / denom; | |
1926 | rollingData[i] = [date, | |
1927 | [p * mult, (p - low) * mult, (high - p) * mult]]; | |
1928 | } else { | |
1929 | rollingData[i] = [date, [0, 0, 0]]; | |
1930 | } | |
1931 | } else { | |
1932 | var stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; | |
1933 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; | |
1934 | } | |
1935 | } else { | |
1936 | rollingData[i] = [date, mult * value]; | |
1937 | } | |
1938 | } | |
9922b78b | 1939 | } else if (this.attr_("customBars")) { |
f6885d6a DV |
1940 | var low = 0; |
1941 | var mid = 0; | |
1942 | var high = 0; | |
1943 | var count = 0; | |
6a1aa64f DV |
1944 | for (var i = 0; i < originalData.length; i++) { |
1945 | var data = originalData[i][1]; | |
1946 | var y = data[1]; | |
1947 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; | |
f6885d6a | 1948 | |
8b91c51f | 1949 | if (y != null && !isNaN(y)) { |
49a7d0d5 DV |
1950 | low += data[0]; |
1951 | mid += y; | |
1952 | high += data[2]; | |
1953 | count += 1; | |
1954 | } | |
f6885d6a DV |
1955 | if (i - rollPeriod >= 0) { |
1956 | var prev = originalData[i - rollPeriod]; | |
8b91c51f | 1957 | if (prev[1][1] != null && !isNaN(prev[1][1])) { |
49a7d0d5 DV |
1958 | low -= prev[1][0]; |
1959 | mid -= prev[1][1]; | |
1960 | high -= prev[1][2]; | |
1961 | count -= 1; | |
1962 | } | |
f6885d6a DV |
1963 | } |
1964 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, | |
1965 | 1.0 * (mid - low) / count, | |
1966 | 1.0 * (high - mid) / count ]]; | |
2769de62 | 1967 | } |
6a1aa64f DV |
1968 | } else { |
1969 | // Calculate the rolling average for the first rollPeriod - 1 points where | |
1970 | // there is not enough data to roll over the full number of days | |
1971 | var num_init_points = Math.min(rollPeriod - 1, originalData.length - 2); | |
285a6bda | 1972 | if (!this.attr_("errorBars")){ |
5011e7a1 DV |
1973 | if (rollPeriod == 1) { |
1974 | return originalData; | |
1975 | } | |
1976 | ||
2847c1cf | 1977 | for (var i = 0; i < originalData.length; i++) { |
6a1aa64f | 1978 | var sum = 0; |
5011e7a1 | 1979 | var num_ok = 0; |
2847c1cf DV |
1980 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
1981 | var y = originalData[j][1]; | |
8b91c51f | 1982 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 1983 | num_ok++; |
2847c1cf | 1984 | sum += originalData[j][1]; |
6a1aa64f | 1985 | } |
5011e7a1 | 1986 | if (num_ok) { |
2847c1cf | 1987 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
5011e7a1 | 1988 | } else { |
2847c1cf | 1989 | rollingData[i] = [originalData[i][0], null]; |
5011e7a1 | 1990 | } |
6a1aa64f | 1991 | } |
2847c1cf DV |
1992 | |
1993 | } else { | |
1994 | for (var i = 0; i < originalData.length; i++) { | |
6a1aa64f DV |
1995 | var sum = 0; |
1996 | var variance = 0; | |
5011e7a1 | 1997 | var num_ok = 0; |
2847c1cf | 1998 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
5011e7a1 | 1999 | var y = originalData[j][1][0]; |
8b91c51f | 2000 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 2001 | num_ok++; |
6a1aa64f DV |
2002 | sum += originalData[j][1][0]; |
2003 | variance += Math.pow(originalData[j][1][1], 2); | |
2004 | } | |
5011e7a1 DV |
2005 | if (num_ok) { |
2006 | var stddev = Math.sqrt(variance) / num_ok; | |
2007 | rollingData[i] = [originalData[i][0], | |
2008 | [sum / num_ok, sigma * stddev, sigma * stddev]]; | |
2009 | } else { | |
2010 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
2011 | } | |
6a1aa64f DV |
2012 | } |
2013 | } | |
2014 | } | |
2015 | ||
2016 | return rollingData; | |
2017 | }; | |
2018 | ||
2019 | /** | |
2020 | * Parses a date, returning the number of milliseconds since epoch. This can be | |
285a6bda DV |
2021 | * passed in as an xValueParser in the Dygraph constructor. |
2022 | * TODO(danvk): enumerate formats that this understands. | |
6a1aa64f DV |
2023 | * @param {String} A date in YYYYMMDD format. |
2024 | * @return {Number} Milliseconds since epoch. | |
2025 | * @public | |
2026 | */ | |
285a6bda | 2027 | Dygraph.dateParser = function(dateStr, self) { |
6a1aa64f | 2028 | var dateStrSlashed; |
285a6bda | 2029 | var d; |
986a5026 | 2030 | if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12' |
6a1aa64f | 2031 | dateStrSlashed = dateStr.replace("-", "/", "g"); |
353a0294 DV |
2032 | while (dateStrSlashed.search("-") != -1) { |
2033 | dateStrSlashed = dateStrSlashed.replace("-", "/"); | |
2034 | } | |
285a6bda | 2035 | d = Date.parse(dateStrSlashed); |
2769de62 | 2036 | } else if (dateStr.length == 8) { // e.g. '20090712' |
285a6bda | 2037 | // TODO(danvk): remove support for this format. It's confusing. |
6a1aa64f DV |
2038 | dateStrSlashed = dateStr.substr(0,4) + "/" + dateStr.substr(4,2) |
2039 | + "/" + dateStr.substr(6,2); | |
285a6bda | 2040 | d = Date.parse(dateStrSlashed); |
2769de62 DV |
2041 | } else { |
2042 | // Any format that Date.parse will accept, e.g. "2009/07/12" or | |
2043 | // "2009/07/12 12:34:56" | |
285a6bda DV |
2044 | d = Date.parse(dateStr); |
2045 | } | |
2046 | ||
2047 | if (!d || isNaN(d)) { | |
2048 | self.error("Couldn't parse " + dateStr + " as a date"); | |
2049 | } | |
2050 | return d; | |
2051 | }; | |
2052 | ||
2053 | /** | |
2054 | * Detects the type of the str (date or numeric) and sets the various | |
2055 | * formatting attributes in this.attrs_ based on this type. | |
2056 | * @param {String} str An x value. | |
2057 | * @private | |
2058 | */ | |
2059 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
2060 | var isDate = false; | |
2061 | if (str.indexOf('-') >= 0 || | |
2062 | str.indexOf('/') >= 0 || | |
2063 | isNaN(parseFloat(str))) { | |
2064 | isDate = true; | |
2065 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
2066 | // TODO(danvk): remove support for this format. | |
2067 | isDate = true; | |
2068 | } | |
2069 | ||
2070 | if (isDate) { | |
2071 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
2072 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2073 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2074 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
2075 | } else { |
2076 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
2077 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
2078 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2079 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
6a1aa64f | 2080 | } |
6a1aa64f DV |
2081 | }; |
2082 | ||
2083 | /** | |
2084 | * Parses a string in a special csv format. We expect a csv file where each | |
2085 | * line is a date point, and the first field in each line is the date string. | |
2086 | * We also expect that all remaining fields represent series. | |
285a6bda | 2087 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f DV |
2088 | * date, series1, stddev1, series2, stddev2, ... |
2089 | * @param {Array.<Object>} data See above. | |
2090 | * @private | |
285a6bda DV |
2091 | * |
2092 | * @return Array.<Object> An array with one entry for each row. These entries | |
2093 | * are an array of cells in that row. The first entry is the parsed x-value for | |
2094 | * the row. The second, third, etc. are the y-values. These can take on one of | |
2095 | * three forms, depending on the CSV and constructor parameters: | |
2096 | * 1. numeric value | |
2097 | * 2. [ value, stddev ] | |
2098 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 2099 | */ |
285a6bda | 2100 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f DV |
2101 | var ret = []; |
2102 | var lines = data.split("\n"); | |
3d67f03b DV |
2103 | |
2104 | // Use the default delimiter or fall back to a tab if that makes sense. | |
2105 | var delim = this.attr_('delimiter'); | |
2106 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { | |
2107 | delim = '\t'; | |
2108 | } | |
2109 | ||
285a6bda | 2110 | var start = 0; |
6a1aa64f | 2111 | if (this.labelsFromCSV_) { |
285a6bda | 2112 | start = 1; |
3d67f03b | 2113 | this.attrs_.labels = lines[0].split(delim); |
6a1aa64f DV |
2114 | } |
2115 | ||
03b522a4 DV |
2116 | // Parse the x as a float or return null if it's not a number. |
2117 | var parseFloatOrNull = function(x) { | |
41333ec0 DV |
2118 | var val = parseFloat(x); |
2119 | return isNaN(val) ? null : val; | |
03b522a4 DV |
2120 | }; |
2121 | ||
285a6bda DV |
2122 | var xParser; |
2123 | var defaultParserSet = false; // attempt to auto-detect x value type | |
2124 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 2125 | var outOfOrder = false; |
6a1aa64f DV |
2126 | for (var i = start; i < lines.length; i++) { |
2127 | var line = lines[i]; | |
2128 | if (line.length == 0) continue; // skip blank lines | |
3d67f03b DV |
2129 | if (line[0] == '#') continue; // skip comment lines |
2130 | var inFields = line.split(delim); | |
285a6bda | 2131 | if (inFields.length < 2) continue; |
6a1aa64f DV |
2132 | |
2133 | var fields = []; | |
285a6bda DV |
2134 | if (!defaultParserSet) { |
2135 | this.detectTypeFromString_(inFields[0]); | |
2136 | xParser = this.attr_("xValueParser"); | |
2137 | defaultParserSet = true; | |
2138 | } | |
2139 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
2140 | |
2141 | // If fractions are expected, parse the numbers as "A/B" | |
2142 | if (this.fractions_) { | |
2143 | for (var j = 1; j < inFields.length; j++) { | |
2144 | // TODO(danvk): figure out an appropriate way to flag parse errors. | |
2145 | var vals = inFields[j].split("/"); | |
03b522a4 | 2146 | fields[j] = [parseFloatOrNull(vals[0]), parseFloatOrNull(vals[1])]; |
6a1aa64f | 2147 | } |
285a6bda | 2148 | } else if (this.attr_("errorBars")) { |
6a1aa64f DV |
2149 | // If there are error bars, values are (value, stddev) pairs |
2150 | for (var j = 1; j < inFields.length; j += 2) | |
03b522a4 DV |
2151 | fields[(j + 1) / 2] = [parseFloatOrNull(inFields[j]), |
2152 | parseFloatOrNull(inFields[j + 1])]; | |
9922b78b | 2153 | } else if (this.attr_("customBars")) { |
6a1aa64f DV |
2154 | // Bars are a low;center;high tuple |
2155 | for (var j = 1; j < inFields.length; j++) { | |
2156 | var vals = inFields[j].split(";"); | |
03b522a4 DV |
2157 | fields[j] = [ parseFloatOrNull(vals[0]), |
2158 | parseFloatOrNull(vals[1]), | |
2159 | parseFloatOrNull(vals[2]) ]; | |
6a1aa64f DV |
2160 | } |
2161 | } else { | |
2162 | // Values are just numbers | |
285a6bda | 2163 | for (var j = 1; j < inFields.length; j++) { |
03b522a4 | 2164 | fields[j] = parseFloatOrNull(inFields[j]); |
285a6bda | 2165 | } |
6a1aa64f | 2166 | } |
987840a2 DV |
2167 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
2168 | outOfOrder = true; | |
2169 | } | |
6a1aa64f | 2170 | ret.push(fields); |
285a6bda DV |
2171 | |
2172 | if (fields.length != expectedCols) { | |
2173 | this.error("Number of columns in line " + i + " (" + fields.length + | |
2174 | ") does not agree with number of labels (" + expectedCols + | |
2175 | ") " + line); | |
2176 | } | |
6a1aa64f | 2177 | } |
987840a2 DV |
2178 | |
2179 | if (outOfOrder) { | |
2180 | this.warn("CSV is out of order; order it correctly to speed loading."); | |
2181 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2182 | } | |
2183 | ||
6a1aa64f DV |
2184 | return ret; |
2185 | }; | |
2186 | ||
2187 | /** | |
285a6bda DV |
2188 | * The user has provided their data as a pre-packaged JS array. If the x values |
2189 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
2190 | * are dates, we need to convert them from Date objects to ms since epoch. | |
2191 | * @param {Array.<Object>} data | |
2192 | * @return {Array.<Object>} data with numeric x values. | |
2193 | */ | |
2194 | Dygraph.prototype.parseArray_ = function(data) { | |
2195 | // Peek at the first x value to see if it's numeric. | |
2196 | if (data.length == 0) { | |
2197 | this.error("Can't plot empty data set"); | |
2198 | return null; | |
2199 | } | |
2200 | if (data[0].length == 0) { | |
2201 | this.error("Data set cannot contain an empty row"); | |
2202 | return null; | |
2203 | } | |
2204 | ||
2205 | if (this.attr_("labels") == null) { | |
2206 | this.warn("Using default labels. Set labels explicitly via 'labels' " + | |
2207 | "in the options parameter"); | |
2208 | this.attrs_.labels = [ "X" ]; | |
2209 | for (var i = 1; i < data[0].length; i++) { | |
2210 | this.attrs_.labels.push("Y" + i); | |
2211 | } | |
2212 | } | |
2213 | ||
2dda3850 | 2214 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda DV |
2215 | // Some intelligent defaults for a date x-axis. |
2216 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
bf640e56 | 2217 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
2218 | this.attrs_.xTicker = Dygraph.dateTicker; |
2219 | ||
2220 | // Assume they're all dates. | |
e3ab7b40 | 2221 | var parsedData = Dygraph.clone(data); |
285a6bda DV |
2222 | for (var i = 0; i < data.length; i++) { |
2223 | if (parsedData[i].length == 0) { | |
a323ff4a | 2224 | this.error("Row " + (1 + i) + " of data is empty"); |
285a6bda DV |
2225 | return null; |
2226 | } | |
2227 | if (parsedData[i][0] == null | |
3a909ec5 DV |
2228 | || typeof(parsedData[i][0].getTime) != 'function' |
2229 | || isNaN(parsedData[i][0].getTime())) { | |
be96a1f5 | 2230 | this.error("x value in row " + (1 + i) + " is not a Date"); |
285a6bda DV |
2231 | return null; |
2232 | } | |
2233 | parsedData[i][0] = parsedData[i][0].getTime(); | |
2234 | } | |
2235 | return parsedData; | |
2236 | } else { | |
2237 | // Some intelligent defaults for a numeric x-axis. | |
2238 | this.attrs_.xValueFormatter = function(x) { return x; }; | |
2239 | this.attrs_.xTicker = Dygraph.numericTicks; | |
2240 | return data; | |
2241 | } | |
2242 | }; | |
2243 | ||
2244 | /** | |
79420a1e DV |
2245 | * Parses a DataTable object from gviz. |
2246 | * The data is expected to have a first column that is either a date or a | |
2247 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
2248 | * between this.xValueParser_ and the type of the first column, it will be | |
a685723c | 2249 | * fixed. Fills out rawData_. |
79420a1e DV |
2250 | * @param {Array.<Object>} data See above. |
2251 | * @private | |
2252 | */ | |
285a6bda | 2253 | Dygraph.prototype.parseDataTable_ = function(data) { |
79420a1e DV |
2254 | var cols = data.getNumberOfColumns(); |
2255 | var rows = data.getNumberOfRows(); | |
2256 | ||
d955e223 | 2257 | var indepType = data.getColumnType(0); |
4440f6c8 | 2258 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda DV |
2259 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
2260 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2261 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2262 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
33127159 | 2263 | } else if (indepType == 'number') { |
285a6bda DV |
2264 | this.attrs_.xValueFormatter = function(x) { return x; }; |
2265 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; | |
2266 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2267 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
285a6bda | 2268 | } else { |
987840a2 DV |
2269 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
2270 | "column 1 of DataTable input (Got '" + indepType + "')"); | |
79420a1e DV |
2271 | return null; |
2272 | } | |
2273 | ||
a685723c DV |
2274 | // Array of the column indices which contain data (and not annotations). |
2275 | var colIdx = []; | |
2276 | var annotationCols = {}; // data index -> [annotation cols] | |
2277 | var hasAnnotations = false; | |
2278 | for (var i = 1; i < cols; i++) { | |
2279 | var type = data.getColumnType(i); | |
2280 | if (type == 'number') { | |
2281 | colIdx.push(i); | |
2282 | } else if (type == 'string' && this.attr_('displayAnnotations')) { | |
2283 | // This is OK -- it's an annotation column. | |
2284 | var dataIdx = colIdx[colIdx.length - 1]; | |
2285 | if (!annotationCols.hasOwnProperty(dataIdx)) { | |
2286 | annotationCols[dataIdx] = [i]; | |
2287 | } else { | |
2288 | annotationCols[dataIdx].push(i); | |
2289 | } | |
2290 | hasAnnotations = true; | |
2291 | } else { | |
2292 | this.error("Only 'number' is supported as a dependent type with Gviz." + | |
2293 | " 'string' is only supported if displayAnnotations is true"); | |
2294 | } | |
2295 | } | |
2296 | ||
2297 | // Read column labels | |
2298 | // TODO(danvk): add support back for errorBars | |
2299 | var labels = [data.getColumnLabel(0)]; | |
2300 | for (var i = 0; i < colIdx.length; i++) { | |
2301 | labels.push(data.getColumnLabel(colIdx[i])); | |
2302 | } | |
2303 | this.attrs_.labels = labels; | |
2304 | cols = labels.length; | |
2305 | ||
79420a1e | 2306 | var ret = []; |
987840a2 | 2307 | var outOfOrder = false; |
a685723c | 2308 | var annotations = []; |
79420a1e DV |
2309 | for (var i = 0; i < rows; i++) { |
2310 | var row = []; | |
debe4434 DV |
2311 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
2312 | data.getValue(i, 0) === null) { | |
2313 | this.warning("Ignoring row " + i + | |
2314 | " of DataTable because of undefined or null first column."); | |
2315 | continue; | |
2316 | } | |
2317 | ||
c21d2c2d | 2318 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
2319 | row.push(data.getValue(i, 0).getTime()); |
2320 | } else { | |
2321 | row.push(data.getValue(i, 0)); | |
2322 | } | |
3e3f84e4 | 2323 | if (!this.attr_("errorBars")) { |
a685723c DV |
2324 | for (var j = 0; j < colIdx.length; j++) { |
2325 | var col = colIdx[j]; | |
2326 | row.push(data.getValue(i, col)); | |
2327 | if (hasAnnotations && | |
2328 | annotationCols.hasOwnProperty(col) && | |
2329 | data.getValue(i, annotationCols[col][0]) != null) { | |
2330 | var ann = {}; | |
2331 | ann.series = data.getColumnLabel(col); | |
2332 | ann.xval = row[0]; | |
2333 | ann.shortText = String.fromCharCode(65 /* A */ + annotations.length) | |
2334 | ann.text = ''; | |
2335 | for (var k = 0; k < annotationCols[col].length; k++) { | |
2336 | if (k) ann.text += "\n"; | |
2337 | ann.text += data.getValue(i, annotationCols[col][k]); | |
2338 | } | |
2339 | annotations.push(ann); | |
2340 | } | |
3e3f84e4 DV |
2341 | } |
2342 | } else { | |
2343 | for (var j = 0; j < cols - 1; j++) { | |
2344 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); | |
2345 | } | |
79420a1e | 2346 | } |
987840a2 DV |
2347 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
2348 | outOfOrder = true; | |
2349 | } | |
243d96e8 | 2350 | ret.push(row); |
79420a1e | 2351 | } |
987840a2 DV |
2352 | |
2353 | if (outOfOrder) { | |
2354 | this.warn("DataTable is out of order; order it correctly to speed loading."); | |
2355 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
2356 | } | |
a685723c DV |
2357 | this.rawData_ = ret; |
2358 | ||
2359 | if (annotations.length > 0) { | |
2360 | this.setAnnotations(annotations, true); | |
2361 | } | |
79420a1e DV |
2362 | } |
2363 | ||
24e5350c | 2364 | // These functions are all based on MochiKit. |
fc80a396 DV |
2365 | Dygraph.update = function (self, o) { |
2366 | if (typeof(o) != 'undefined' && o !== null) { | |
2367 | for (var k in o) { | |
85b99f0b DV |
2368 | if (o.hasOwnProperty(k)) { |
2369 | self[k] = o[k]; | |
2370 | } | |
fc80a396 DV |
2371 | } |
2372 | } | |
2373 | return self; | |
2374 | }; | |
2375 | ||
2dda3850 DV |
2376 | Dygraph.isArrayLike = function (o) { |
2377 | var typ = typeof(o); | |
2378 | if ( | |
c21d2c2d | 2379 | (typ != 'object' && !(typ == 'function' && |
2dda3850 DV |
2380 | typeof(o.item) == 'function')) || |
2381 | o === null || | |
2382 | typeof(o.length) != 'number' || | |
2383 | o.nodeType === 3 | |
2384 | ) { | |
2385 | return false; | |
2386 | } | |
2387 | return true; | |
2388 | }; | |
2389 | ||
2390 | Dygraph.isDateLike = function (o) { | |
2391 | if (typeof(o) != "object" || o === null || | |
2392 | typeof(o.getTime) != 'function') { | |
2393 | return false; | |
2394 | } | |
2395 | return true; | |
2396 | }; | |
2397 | ||
e3ab7b40 DV |
2398 | Dygraph.clone = function(o) { |
2399 | // TODO(danvk): figure out how MochiKit's version works | |
2400 | var r = []; | |
2401 | for (var i = 0; i < o.length; i++) { | |
2402 | if (Dygraph.isArrayLike(o[i])) { | |
2403 | r.push(Dygraph.clone(o[i])); | |
2404 | } else { | |
2405 | r.push(o[i]); | |
2406 | } | |
2407 | } | |
2408 | return r; | |
24e5350c DV |
2409 | }; |
2410 | ||
2dda3850 | 2411 | |
79420a1e | 2412 | /** |
6a1aa64f DV |
2413 | * Get the CSV data. If it's in a function, call that function. If it's in a |
2414 | * file, do an XMLHttpRequest to get it. | |
2415 | * @private | |
2416 | */ | |
285a6bda | 2417 | Dygraph.prototype.start_ = function() { |
6a1aa64f | 2418 | if (typeof this.file_ == 'function') { |
285a6bda | 2419 | // CSV string. Pretend we got it via XHR. |
6a1aa64f | 2420 | this.loadedEvent_(this.file_()); |
2dda3850 | 2421 | } else if (Dygraph.isArrayLike(this.file_)) { |
285a6bda DV |
2422 | this.rawData_ = this.parseArray_(this.file_); |
2423 | this.drawGraph_(this.rawData_); | |
79420a1e DV |
2424 | } else if (typeof this.file_ == 'object' && |
2425 | typeof this.file_.getColumnRange == 'function') { | |
2426 | // must be a DataTable from gviz. | |
a685723c | 2427 | this.parseDataTable_(this.file_); |
79420a1e | 2428 | this.drawGraph_(this.rawData_); |
285a6bda DV |
2429 | } else if (typeof this.file_ == 'string') { |
2430 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. | |
2431 | if (this.file_.indexOf('\n') >= 0) { | |
2432 | this.loadedEvent_(this.file_); | |
2433 | } else { | |
2434 | var req = new XMLHttpRequest(); | |
2435 | var caller = this; | |
2436 | req.onreadystatechange = function () { | |
2437 | if (req.readyState == 4) { | |
2438 | if (req.status == 200) { | |
2439 | caller.loadedEvent_(req.responseText); | |
2440 | } | |
6a1aa64f | 2441 | } |
285a6bda | 2442 | }; |
6a1aa64f | 2443 | |
285a6bda DV |
2444 | req.open("GET", this.file_, true); |
2445 | req.send(null); | |
2446 | } | |
2447 | } else { | |
2448 | this.error("Unknown data format: " + (typeof this.file_)); | |
6a1aa64f DV |
2449 | } |
2450 | }; | |
2451 | ||
2452 | /** | |
2453 | * Changes various properties of the graph. These can include: | |
2454 | * <ul> | |
2455 | * <li>file: changes the source data for the graph</li> | |
2456 | * <li>errorBars: changes whether the data contains stddev</li> | |
2457 | * </ul> | |
2458 | * @param {Object} attrs The new properties and values | |
2459 | */ | |
285a6bda DV |
2460 | Dygraph.prototype.updateOptions = function(attrs) { |
2461 | // TODO(danvk): this is a mess. Rethink this function. | |
6a1aa64f DV |
2462 | if (attrs.rollPeriod) { |
2463 | this.rollPeriod_ = attrs.rollPeriod; | |
2464 | } | |
2465 | if (attrs.dateWindow) { | |
2466 | this.dateWindow_ = attrs.dateWindow; | |
2467 | } | |
2468 | if (attrs.valueRange) { | |
2469 | this.valueRange_ = attrs.valueRange; | |
2470 | } | |
fc80a396 | 2471 | Dygraph.update(this.user_attrs_, attrs); |
87bb7958 | 2472 | Dygraph.update(this.renderOptions_, attrs); |
285a6bda DV |
2473 | |
2474 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
2475 | ||
2476 | // TODO(danvk): this doesn't match the constructor logic | |
2477 | this.layout_.updateOptions({ 'errorBars': this.attr_("errorBars") }); | |
5e50289f | 2478 | if (attrs['file']) { |
6a1aa64f DV |
2479 | this.file_ = attrs['file']; |
2480 | this.start_(); | |
2481 | } else { | |
2482 | this.drawGraph_(this.rawData_); | |
2483 | } | |
2484 | }; | |
2485 | ||
2486 | /** | |
697e70b2 DV |
2487 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
2488 | * containing div (which has presumably changed size since the dygraph was | |
2489 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
2490 | * |
2491 | * This is far more efficient than destroying and re-instantiating a | |
2492 | * Dygraph, since it doesn't have to reparse the underlying data. | |
2493 | * | |
697e70b2 DV |
2494 | * @param {Number} width Width (in pixels) |
2495 | * @param {Number} height Height (in pixels) | |
2496 | */ | |
2497 | Dygraph.prototype.resize = function(width, height) { | |
e8c7ef86 DV |
2498 | if (this.resize_lock) { |
2499 | return; | |
2500 | } | |
2501 | this.resize_lock = true; | |
2502 | ||
697e70b2 DV |
2503 | if ((width === null) != (height === null)) { |
2504 | this.warn("Dygraph.resize() should be called with zero parameters or " + | |
2505 | "two non-NULL parameters. Pretending it was zero."); | |
2506 | width = height = null; | |
2507 | } | |
2508 | ||
b16e6369 | 2509 | // TODO(danvk): there should be a clear() method. |
697e70b2 | 2510 | this.maindiv_.innerHTML = ""; |
b16e6369 DV |
2511 | this.attrs_.labelsDiv = null; |
2512 | ||
697e70b2 DV |
2513 | if (width) { |
2514 | this.maindiv_.style.width = width + "px"; | |
2515 | this.maindiv_.style.height = height + "px"; | |
2516 | this.width_ = width; | |
2517 | this.height_ = height; | |
2518 | } else { | |
2519 | this.width_ = this.maindiv_.offsetWidth; | |
2520 | this.height_ = this.maindiv_.offsetHeight; | |
2521 | } | |
2522 | ||
2523 | this.createInterface_(); | |
964f30c6 | 2524 | this.drawGraph_(this.rawData_); |
e8c7ef86 DV |
2525 | |
2526 | this.resize_lock = false; | |
697e70b2 DV |
2527 | }; |
2528 | ||
2529 | /** | |
6a1aa64f DV |
2530 | * Adjusts the number of days in the rolling average. Updates the graph to |
2531 | * reflect the new averaging period. | |
2532 | * @param {Number} length Number of days over which to average the data. | |
2533 | */ | |
285a6bda | 2534 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f DV |
2535 | this.rollPeriod_ = length; |
2536 | this.drawGraph_(this.rawData_); | |
2537 | }; | |
540d00f1 | 2538 | |
f8cfec73 | 2539 | /** |
1cf11047 DV |
2540 | * Returns a boolean array of visibility statuses. |
2541 | */ | |
2542 | Dygraph.prototype.visibility = function() { | |
2543 | // Do lazy-initialization, so that this happens after we know the number of | |
2544 | // data series. | |
2545 | if (!this.attr_("visibility")) { | |
f38dec01 | 2546 | this.attrs_["visibility"] = []; |
1cf11047 DV |
2547 | } |
2548 | while (this.attr_("visibility").length < this.rawData_[0].length - 1) { | |
f38dec01 | 2549 | this.attr_("visibility").push(true); |
1cf11047 DV |
2550 | } |
2551 | return this.attr_("visibility"); | |
2552 | }; | |
2553 | ||
2554 | /** | |
2555 | * Changes the visiblity of a series. | |
2556 | */ | |
2557 | Dygraph.prototype.setVisibility = function(num, value) { | |
2558 | var x = this.visibility(); | |
2559 | if (num < 0 && num >= x.length) { | |
2560 | this.warn("invalid series number in setVisibility: " + num); | |
2561 | } else { | |
2562 | x[num] = value; | |
2563 | this.drawGraph_(this.rawData_); | |
2564 | } | |
2565 | }; | |
2566 | ||
2567 | /** | |
5c528fa2 DV |
2568 | * Update the list of annotations and redraw the chart. |
2569 | */ | |
a685723c | 2570 | Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { |
5c528fa2 DV |
2571 | this.annotations_ = ann; |
2572 | this.layout_.setAnnotations(this.annotations_); | |
a685723c DV |
2573 | if (!suppressDraw) { |
2574 | this.drawGraph_(this.rawData_); | |
2575 | } | |
5c528fa2 DV |
2576 | }; |
2577 | ||
2578 | /** | |
2579 | * Return the list of annotations. | |
2580 | */ | |
2581 | Dygraph.prototype.annotations = function() { | |
2582 | return this.annotations_; | |
2583 | }; | |
2584 | ||
2585 | Dygraph.addAnnotationRule = function() { | |
2586 | if (Dygraph.addedAnnotationCSS) return; | |
2587 | ||
18a016b1 DV |
2588 | var mysheet; |
2589 | if (document.styleSheets.length > 0) { | |
2590 | mysheet = document.styleSheets[0]; | |
2591 | } else { | |
2592 | var styleSheetElement = document.createElement("style"); | |
2593 | styleSheetElement.type = "text/css"; | |
2594 | document.getElementsByTagName("head")[0].appendChild(styleSheetElement); | |
2595 | for(i = 0; i < document.styleSheets.length; i++) { | |
2596 | if (document.styleSheets[i].disabled) continue; | |
2597 | mysheet = document.styleSheets[i]; | |
2598 | } | |
2599 | } | |
2600 | ||
5c528fa2 DV |
2601 | var rule = "border: 1px solid black; " + |
2602 | "background-color: white; " + | |
2603 | "text-align: center;"; | |
2604 | if (mysheet.insertRule) { // Firefox | |
b39466eb | 2605 | mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", 0); |
5c528fa2 DV |
2606 | } else if (mysheet.addRule) { // IE |
2607 | mysheet.addRule(".dygraphDefaultAnnotation", rule); | |
2608 | } | |
2609 | ||
2610 | Dygraph.addedAnnotationCSS = true; | |
2611 | } | |
2612 | ||
2613 | /** | |
f8cfec73 DV |
2614 | * Create a new canvas element. This is more complex than a simple |
2615 | * document.createElement("canvas") because of IE and excanvas. | |
2616 | */ | |
2617 | Dygraph.createCanvas = function() { | |
2618 | var canvas = document.createElement("canvas"); | |
2619 | ||
2620 | isIE = (/MSIE/.test(navigator.userAgent) && !window.opera); | |
2621 | if (isIE) { | |
2622 | canvas = G_vmlCanvasManager.initElement(canvas); | |
2623 | } | |
2624 | ||
2625 | return canvas; | |
2626 | }; | |
2627 | ||
540d00f1 DV |
2628 | |
2629 | /** | |
285a6bda | 2630 | * A wrapper around Dygraph that implements the gviz API. |
540d00f1 DV |
2631 | * @param {Object} container The DOM object the visualization should live in. |
2632 | */ | |
285a6bda | 2633 | Dygraph.GVizChart = function(container) { |
540d00f1 DV |
2634 | this.container = container; |
2635 | } | |
2636 | ||
285a6bda | 2637 | Dygraph.GVizChart.prototype.draw = function(data, options) { |
540d00f1 | 2638 | this.container.innerHTML = ''; |
285a6bda | 2639 | this.date_graph = new Dygraph(this.container, data, options); |
540d00f1 | 2640 | } |
285a6bda | 2641 | |
239c712d NAG |
2642 | /** |
2643 | * Google charts compatible setSelection | |
50360fd0 | 2644 | * Only row selection is supported, all points in the row will be highlighted |
239c712d NAG |
2645 | * @param {Array} array of the selected cells |
2646 | * @public | |
2647 | */ | |
2648 | Dygraph.GVizChart.prototype.setSelection = function(selection_array) { | |
2649 | var row = false; | |
2650 | if (selection_array.length) { | |
2651 | row = selection_array[0].row; | |
2652 | } | |
2653 | this.date_graph.setSelection(row); | |
2654 | } | |
2655 | ||
103b7292 NAG |
2656 | /** |
2657 | * Google charts compatible getSelection implementation | |
2658 | * @return {Array} array of the selected cells | |
2659 | * @public | |
2660 | */ | |
2661 | Dygraph.GVizChart.prototype.getSelection = function() { | |
2662 | var selection = []; | |
50360fd0 | 2663 | |
103b7292 | 2664 | var row = this.date_graph.getSelection(); |
50360fd0 | 2665 | |
103b7292 | 2666 | if (row < 0) return selection; |
50360fd0 | 2667 | |
103b7292 NAG |
2668 | col = 1; |
2669 | for (var i in this.date_graph.layout_.datasets) { | |
2670 | selection.push({row: row, column: col}); | |
2671 | col++; | |
2672 | } | |
2673 | ||
2674 | return selection; | |
2675 | } | |
2676 | ||
285a6bda DV |
2677 | // Older pages may still use this name. |
2678 | DateGraph = Dygraph; |