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88e95c46 DV |
1 | /** |
2 | * @license | |
3 | * Copyright 2006 Dan Vanderkam (danvdk@gmail.com) | |
4 | * MIT-licensed (http://opensource.org/licenses/MIT) | |
5 | */ | |
6a1aa64f DV |
6 | |
7 | /** | |
8 | * @fileoverview Creates an interactive, zoomable graph based on a CSV file or | |
285a6bda DV |
9 | * string. Dygraph can handle multiple series with or without error bars. The |
10 | * date/value ranges will be automatically set. Dygraph uses the | |
6a1aa64f DV |
11 | * <canvas> tag, so it only works in FF1.5+. |
12 | * @author danvdk@gmail.com (Dan Vanderkam) | |
13 | ||
14 | Usage: | |
15 | <div id="graphdiv" style="width:800px; height:500px;"></div> | |
16 | <script type="text/javascript"> | |
285a6bda DV |
17 | new Dygraph(document.getElementById("graphdiv"), |
18 | "datafile.csv", // CSV file with headers | |
19 | { }); // options | |
6a1aa64f DV |
20 | </script> |
21 | ||
22 | The CSV file is of the form | |
23 | ||
285a6bda | 24 | Date,SeriesA,SeriesB,SeriesC |
6a1aa64f DV |
25 | YYYYMMDD,A1,B1,C1 |
26 | YYYYMMDD,A2,B2,C2 | |
27 | ||
6a1aa64f DV |
28 | If the 'errorBars' option is set in the constructor, the input should be of |
29 | the form | |
285a6bda | 30 | Date,SeriesA,SeriesB,... |
6a1aa64f DV |
31 | YYYYMMDD,A1,sigmaA1,B1,sigmaB1,... |
32 | YYYYMMDD,A2,sigmaA2,B2,sigmaB2,... | |
33 | ||
34 | If the 'fractions' option is set, the input should be of the form: | |
35 | ||
285a6bda | 36 | Date,SeriesA,SeriesB,... |
6a1aa64f DV |
37 | YYYYMMDD,A1/B1,A2/B2,... |
38 | YYYYMMDD,A1/B1,A2/B2,... | |
39 | ||
40 | And error bars will be calculated automatically using a binomial distribution. | |
41 | ||
727439b4 | 42 | For further documentation and examples, see http://dygraphs.com/ |
6a1aa64f DV |
43 | |
44 | */ | |
45 | ||
758a629f | 46 | /*jshint globalstrict: true */ |
ac6a9c2b | 47 | /*global DygraphLayout:false, DygraphCanvasRenderer:false, DygraphOptions:false, G_vmlCanvasManager:false,ActiveXObject:false */ |
c0f54d4f DV |
48 | "use strict"; |
49 | ||
6a1aa64f | 50 | /** |
629a09ae DV |
51 | * Creates an interactive, zoomable chart. |
52 | * | |
53 | * @constructor | |
54 | * @param {div | String} div A div or the id of a div into which to construct | |
55 | * the chart. | |
56 | * @param {String | Function} file A file containing CSV data or a function | |
57 | * that returns this data. The most basic expected format for each line is | |
58 | * "YYYY/MM/DD,val1,val2,...". For more information, see | |
59 | * http://dygraphs.com/data.html. | |
6a1aa64f | 60 | * @param {Object} attrs Various other attributes, e.g. errorBars determines |
629a09ae DV |
61 | * whether the input data contains error ranges. For a complete list of |
62 | * options, see http://dygraphs.com/options.html. | |
6a1aa64f | 63 | */ |
86a3e64f | 64 | var Dygraph = function(div, data, opts, opt_fourth_param) { |
28eb1748 DV |
65 | // These have to go above the "Hack for IE" in __init__ since .ready() can be |
66 | // called as soon as the constructor returns. Once support for OldIE is | |
67 | // dropped, this can go down with the rest of the initializers. | |
68 | this.is_initial_draw_ = true; | |
69 | this.readyFns_ = []; | |
70 | ||
86a3e64f DV |
71 | if (opt_fourth_param !== undefined) { |
72 | // Old versions of dygraphs took in the series labels as a constructor | |
73 | // parameter. This doesn't make sense anymore, but it's easy to continue | |
74 | // to support this usage. | |
464b5f50 | 75 | Dygraph.warn("Using deprecated four-argument dygraph constructor"); |
86a3e64f DV |
76 | this.__old_init__(div, data, opts, opt_fourth_param); |
77 | } else { | |
78 | this.__init__(div, data, opts); | |
285a6bda | 79 | } |
6a1aa64f DV |
80 | }; |
81 | ||
285a6bda | 82 | Dygraph.NAME = "Dygraph"; |
e4b58391 | 83 | Dygraph.VERSION = "1.0.1"; |
285a6bda | 84 | Dygraph.__repr__ = function() { |
1bc88216 | 85 | return "[" + Dygraph.NAME + " " + Dygraph.VERSION + "]"; |
6a1aa64f | 86 | }; |
629a09ae DV |
87 | |
88 | /** | |
89 | * Returns information about the Dygraph class. | |
90 | */ | |
285a6bda | 91 | Dygraph.toString = function() { |
1bc88216 | 92 | return Dygraph.__repr__(); |
6a1aa64f DV |
93 | }; |
94 | ||
95 | // Various default values | |
285a6bda DV |
96 | Dygraph.DEFAULT_ROLL_PERIOD = 1; |
97 | Dygraph.DEFAULT_WIDTH = 480; | |
98 | Dygraph.DEFAULT_HEIGHT = 320; | |
6a1aa64f | 99 | |
a96b8ba3 A |
100 | // For max 60 Hz. animation: |
101 | Dygraph.ANIMATION_STEPS = 12; | |
b1a3b195 DV |
102 | Dygraph.ANIMATION_DURATION = 200; |
103 | ||
6108122b DV |
104 | // Label constants for the labelsKMB and labelsKMG2 options. |
105 | // (i.e. '100000' -> '100K') | |
2fd143d3 DV |
106 | Dygraph.KMB_LABELS = [ 'K', 'M', 'B', 'T', 'Q' ]; |
107 | Dygraph.KMG2_BIG_LABELS = [ 'k', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y' ]; | |
108 | Dygraph.KMG2_SMALL_LABELS = [ 'm', 'u', 'n', 'p', 'f', 'a', 'z', 'y' ]; | |
109 | ||
48e614ac DV |
110 | // These are defined before DEFAULT_ATTRS so that it can refer to them. |
111 | /** | |
112 | * @private | |
113 | * Return a string version of a number. This respects the digitsAfterDecimal | |
114 | * and maxNumberWidth options. | |
1bc88216 | 115 | * @param {number} x The number to be formatted |
48e614ac | 116 | * @param {Dygraph} opts An options view |
1bc88216 | 117 | * @param {string} name The name of the point's data series |
48e614ac DV |
118 | * @param {Dygraph} g The dygraph object |
119 | */ | |
120 | Dygraph.numberValueFormatter = function(x, opts, pt, g) { | |
121 | var sigFigs = opts('sigFigs'); | |
122 | ||
123 | if (sigFigs !== null) { | |
124 | // User has opted for a fixed number of significant figures. | |
125 | return Dygraph.floatFormat(x, sigFigs); | |
126 | } | |
127 | ||
128 | var digits = opts('digitsAfterDecimal'); | |
129 | var maxNumberWidth = opts('maxNumberWidth'); | |
130 | ||
2fd143d3 DV |
131 | var kmb = opts('labelsKMB'); |
132 | var kmg2 = opts('labelsKMG2'); | |
133 | ||
134 | var label; | |
135 | ||
48e614ac DV |
136 | // switch to scientific notation if we underflow or overflow fixed display. |
137 | if (x !== 0.0 && | |
138 | (Math.abs(x) >= Math.pow(10, maxNumberWidth) || | |
139 | Math.abs(x) < Math.pow(10, -digits))) { | |
2fd143d3 | 140 | label = x.toExponential(digits); |
48e614ac | 141 | } else { |
2fd143d3 | 142 | label = '' + Dygraph.round_(x, digits); |
48e614ac | 143 | } |
2fd143d3 DV |
144 | |
145 | if (kmb || kmg2) { | |
146 | var k; | |
147 | var k_labels = []; | |
148 | var m_labels = []; | |
149 | if (kmb) { | |
150 | k = 1000; | |
6108122b | 151 | k_labels = Dygraph.KMB_LABELS; |
2fd143d3 DV |
152 | } |
153 | if (kmg2) { | |
154 | if (kmb) Dygraph.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); | |
155 | k = 1024; | |
6108122b DV |
156 | k_labels = Dygraph.KMG2_BIG_LABELS; |
157 | m_labels = Dygraph.KMG2_SMALL_LABELS; | |
2fd143d3 DV |
158 | } |
159 | ||
160 | var absx = Math.abs(x); | |
161 | var n = Dygraph.pow(k, k_labels.length); | |
162 | for (var j = k_labels.length - 1; j >= 0; j--, n /= k) { | |
163 | if (absx >= n) { | |
164 | label = Dygraph.round_(x / n, digits) + k_labels[j]; | |
165 | break; | |
166 | } | |
167 | } | |
168 | if (kmg2) { | |
169 | // TODO(danvk): clean up this logic. Why so different than kmb? | |
170 | var x_parts = String(x.toExponential()).split('e-'); | |
171 | if (x_parts.length === 2 && x_parts[1] >= 3 && x_parts[1] <= 24) { | |
172 | if (x_parts[1] % 3 > 0) { | |
173 | label = Dygraph.round_(x_parts[0] / | |
174 | Dygraph.pow(10, (x_parts[1] % 3)), | |
175 | digits); | |
176 | } else { | |
177 | label = Number(x_parts[0]).toFixed(2); | |
178 | } | |
179 | label += m_labels[Math.floor(x_parts[1] / 3) - 1]; | |
180 | } | |
181 | } | |
182 | } | |
183 | ||
184 | return label; | |
48e614ac DV |
185 | }; |
186 | ||
187 | /** | |
188 | * variant for use as an axisLabelFormatter. | |
189 | * @private | |
190 | */ | |
191 | Dygraph.numberAxisLabelFormatter = function(x, granularity, opts, g) { | |
192 | return Dygraph.numberValueFormatter(x, opts, g); | |
193 | }; | |
194 | ||
195 | /** | |
7b2dfd06 | 196 | * @type {!Array.<string>} |
48e614ac | 197 | * @private |
7b2dfd06 | 198 | * @constant |
48e614ac | 199 | */ |
7b2dfd06 | 200 | Dygraph.SHORT_MONTH_NAMES_ = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']; |
48e614ac | 201 | |
48e614ac DV |
202 | |
203 | /** | |
204 | * Convert a JS date to a string appropriate to display on an axis that | |
872a6a00 DV |
205 | * is displaying values at the stated granularity. This respects the |
206 | * labelsDateUTC option. | |
48e614ac | 207 | * @param {Date} date The date to format |
1bc88216 | 208 | * @param {number} granularity One of the Dygraph granularity constants |
872a6a00 DV |
209 | * @param {Dygraph} opts An options view |
210 | * @return {string} The date formatted as local time | |
48e614ac DV |
211 | * @private |
212 | */ | |
872a6a00 DV |
213 | Dygraph.dateAxisLabelFormatter = function(date, granularity, opts) { |
214 | var utc = opts('labelsDateUTC'); | |
215 | var year, month, day, hours, mins, secs, millis; | |
216 | if (utc) { | |
217 | year = date.getUTCFullYear(); | |
218 | month = date.getUTCMonth(); | |
219 | day = date.getUTCDate(); | |
220 | hours = date.getUTCHours(); | |
221 | mins = date.getUTCMinutes(); | |
222 | secs = date.getUTCSeconds(); | |
223 | millis = date.getUTCMilliseconds(); | |
224 | } else { | |
225 | year = date.getFullYear(); | |
226 | month = date.getMonth(); | |
227 | day = date.getDate(); | |
228 | hours = date.getHours(); | |
229 | mins = date.getMinutes(); | |
230 | secs = date.getSeconds(); | |
231 | millis = date.getMilliseconds(); | |
232 | } | |
48e614ac | 233 | if (granularity >= Dygraph.DECADAL) { |
872a6a00 | 234 | return '' + year; |
48e614ac | 235 | } else if (granularity >= Dygraph.MONTHLY) { |
128f6d54 | 236 | return Dygraph.SHORT_MONTH_NAMES_[month] + ' ' + Dygraph.zeropad(year); |
48e614ac | 237 | } else { |
872a6a00 | 238 | var frac = hours * 3600 + mins * 60 + secs + 1e-3 * millis; |
758a629f | 239 | if (frac === 0 || granularity >= Dygraph.DAILY) { |
7b2dfd06 | 240 | // e.g. '21Jan' (%d%b) |
872a6a00 | 241 | return Dygraph.zeropad(day) + Dygraph.SHORT_MONTH_NAMES_[month]; |
48e614ac | 242 | } else { |
872a6a00 | 243 | return Dygraph.hmsString_(hours, mins, secs); |
48e614ac DV |
244 | } |
245 | } | |
246 | }; | |
247 | ||
38e3d209 | 248 | /** |
872a6a00 DV |
249 | * Return a string version of a JS date for a value label. This respects the |
250 | * labelsDateUTC option. | |
251 | * @param {Date} date The date to be formatted | |
252 | * @param {Dygraph} opts An options view | |
aaaf030e | 253 | * @private |
872a6a00 DV |
254 | */ |
255 | Dygraph.dateValueFormatter = function(d, opts) { | |
256 | return Dygraph.dateString_(d, opts('labelsDateUTC')); | |
257 | }; | |
258 | ||
259 | /** | |
38e3d209 DV |
260 | * Standard plotters. These may be used by clients. |
261 | * Available plotters are: | |
262 | * - Dygraph.Plotters.linePlotter: draws central lines (most common) | |
263 | * - Dygraph.Plotters.errorPlotter: draws error bars | |
264 | * - Dygraph.Plotters.fillPlotter: draws fills under lines (used with fillGraph) | |
265 | * | |
266 | * By default, the plotter is [fillPlotter, errorPlotter, linePlotter]. | |
267 | * This causes all the lines to be drawn over all the fills/error bars. | |
268 | */ | |
269 | Dygraph.Plotters = DygraphCanvasRenderer._Plotters; | |
270 | ||
48e614ac | 271 | |
8e4a6af3 | 272 | // Default attribute values. |
285a6bda | 273 | Dygraph.DEFAULT_ATTRS = { |
a9fc39ab | 274 | highlightCircleSize: 3, |
857a6931 | 275 | highlightSeriesOpts: null, |
afdb20d8 | 276 | highlightSeriesBackgroundAlpha: 0.5, |
285a6bda | 277 | |
8e4a6af3 DV |
278 | labelsDivWidth: 250, |
279 | labelsDivStyles: { | |
280 | // TODO(danvk): move defaults from createStatusMessage_ here. | |
285a6bda DV |
281 | }, |
282 | labelsSeparateLines: false, | |
bcd3ebf0 | 283 | labelsShowZeroValues: true, |
285a6bda | 284 | labelsKMB: false, |
afefbcdb | 285 | labelsKMG2: false, |
d160cc3b | 286 | showLabelsOnHighlight: true, |
12e4c741 | 287 | |
2e1fcf1a DV |
288 | digitsAfterDecimal: 2, |
289 | maxNumberWidth: 6, | |
19589a3e | 290 | sigFigs: null, |
285a6bda DV |
291 | |
292 | strokeWidth: 1.0, | |
857a6931 KW |
293 | strokeBorderWidth: 0, |
294 | strokeBorderColor: "white", | |
8e4a6af3 | 295 | |
8846615a DV |
296 | axisTickSize: 3, |
297 | axisLabelFontSize: 14, | |
298 | xAxisLabelWidth: 50, | |
299 | yAxisLabelWidth: 50, | |
300 | rightGap: 5, | |
285a6bda DV |
301 | |
302 | showRoller: false, | |
285a6bda | 303 | xValueParser: Dygraph.dateParser, |
285a6bda | 304 | |
3d67f03b DV |
305 | delimiter: ',', |
306 | ||
285a6bda DV |
307 | sigma: 2.0, |
308 | errorBars: false, | |
309 | fractions: false, | |
310 | wilsonInterval: true, // only relevant if fractions is true | |
5954ef32 | 311 | customBars: false, |
43af96e7 NK |
312 | fillGraph: false, |
313 | fillAlpha: 0.15, | |
f032c51d | 314 | connectSeparatedPoints: false, |
43af96e7 NK |
315 | |
316 | stackedGraph: false, | |
30a5cfc6 | 317 | stackedGraphNaNFill: 'all', |
afdc483f NN |
318 | hideOverlayOnMouseOut: true, |
319 | ||
2fccd3dc DV |
320 | // TODO(danvk): support 'onmouseover' and 'never', and remove synonyms. |
321 | legend: 'onmouseover', // the only relevant value at the moment is 'always'. | |
322 | ||
00c281d4 | 323 | stepPlot: false, |
062ef401 | 324 | avoidMinZero: false, |
fa460473 KW |
325 | xRangePad: 0, |
326 | yRangePad: null, | |
f4b87da2 | 327 | drawAxesAtZero: false, |
062ef401 | 328 | |
ad1798c2 | 329 | // Sizes of the various chart labels. |
b4202b3d | 330 | titleHeight: 28, |
86cce9e8 DV |
331 | xLabelHeight: 18, |
332 | yLabelWidth: 18, | |
ad1798c2 | 333 | |
423f5ed3 DV |
334 | drawXAxis: true, |
335 | drawYAxis: true, | |
336 | axisLineColor: "black", | |
990d6a35 DV |
337 | axisLineWidth: 0.3, |
338 | gridLineWidth: 0.3, | |
339 | axisLabelColor: "black", | |
340 | axisLabelFont: "Arial", // TODO(danvk): is this implemented? | |
341 | axisLabelWidth: 50, | |
342 | drawYGrid: true, | |
343 | drawXGrid: true, | |
344 | gridLineColor: "rgb(128,128,128)", | |
423f5ed3 | 345 | |
48e614ac | 346 | interactionModel: null, // will be set to Dygraph.Interaction.defaultModel |
b1a3b195 | 347 | animatedZooms: false, // (for now) |
48e614ac | 348 | |
ccd9d7c2 PF |
349 | // Range selector options |
350 | showRangeSelector: false, | |
351 | rangeSelectorHeight: 40, | |
352 | rangeSelectorPlotStrokeColor: "#808FAB", | |
353 | rangeSelectorPlotFillColor: "#A7B1C4", | |
354 | ||
38e3d209 DV |
355 | // The ordering here ensures that central lines always appear above any |
356 | // fill bars/error bars. | |
357 | plotter: [ | |
358 | Dygraph.Plotters.fillPlotter, | |
359 | Dygraph.Plotters.errorPlotter, | |
360 | Dygraph.Plotters.linePlotter | |
361 | ], | |
362 | ||
eced46cf | 363 | plugins: [ ], |
d9fbba56 | 364 | |
48e614ac DV |
365 | // per-axis options |
366 | axes: { | |
367 | x: { | |
368 | pixelsPerLabel: 60, | |
872a6a00 DV |
369 | axisLabelFormatter: Dygraph.dateAxisLabelFormatter, |
370 | valueFormatter: Dygraph.dateValueFormatter, | |
9e906ae6 | 371 | drawGrid: true, |
7f6a7190 | 372 | drawAxis: true, |
9e906ae6 | 373 | independentTicks: true, |
48e614ac DV |
374 | ticker: null // will be set in dygraph-tickers.js |
375 | }, | |
376 | y: { | |
377 | pixelsPerLabel: 30, | |
378 | valueFormatter: Dygraph.numberValueFormatter, | |
379 | axisLabelFormatter: Dygraph.numberAxisLabelFormatter, | |
9e906ae6 | 380 | drawGrid: true, |
7f6a7190 | 381 | drawAxis: true, |
9e906ae6 | 382 | independentTicks: true, |
48e614ac DV |
383 | ticker: null // will be set in dygraph-tickers.js |
384 | }, | |
385 | y2: { | |
386 | pixelsPerLabel: 30, | |
387 | valueFormatter: Dygraph.numberValueFormatter, | |
388 | axisLabelFormatter: Dygraph.numberAxisLabelFormatter, | |
7f6a7190 | 389 | drawAxis: false, |
9e906ae6 DE |
390 | drawGrid: false, |
391 | independentTicks: false, | |
48e614ac DV |
392 | ticker: null // will be set in dygraph-tickers.js |
393 | } | |
394 | } | |
285a6bda DV |
395 | }; |
396 | ||
39b0e098 RK |
397 | // Directions for panning and zooming. Use bit operations when combined |
398 | // values are possible. | |
399 | Dygraph.HORIZONTAL = 1; | |
400 | Dygraph.VERTICAL = 2; | |
401 | ||
e2c21500 DV |
402 | // Installed plugins, in order of precedence (most-general to most-specific). |
403 | // Plugins are installed after they are defined, in plugins/install.js. | |
404 | Dygraph.PLUGINS = [ | |
405 | ]; | |
406 | ||
5c528fa2 DV |
407 | // Used for initializing annotation CSS rules only once. |
408 | Dygraph.addedAnnotationCSS = false; | |
409 | ||
285a6bda DV |
410 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { |
411 | // Labels is no longer a constructor parameter, since it's typically set | |
412 | // directly from the data source. It also conains a name for the x-axis, | |
413 | // which the previous constructor form did not. | |
758a629f | 414 | if (labels !== null) { |
285a6bda DV |
415 | var new_labels = ["Date"]; |
416 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); | |
fc80a396 | 417 | Dygraph.update(attrs, { 'labels': new_labels }); |
285a6bda DV |
418 | } |
419 | this.__init__(div, file, attrs); | |
8e4a6af3 DV |
420 | }; |
421 | ||
6a1aa64f | 422 | /** |
285a6bda | 423 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
7aedf6fe | 424 | * and context <canvas> inside of it. See the constructor for details. |
6a1aa64f | 425 | * on the parameters. |
12e4c741 | 426 | * @param {Element} div the Element to render the graph into. |
1bc88216 | 427 | * @param {string | Function} file Source data |
6a1aa64f DV |
428 | * @param {Object} attrs Miscellaneous other options |
429 | * @private | |
430 | */ | |
285a6bda | 431 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
a2c8fff4 DV |
432 | // Hack for IE: if we're using excanvas and the document hasn't finished |
433 | // loading yet (and hence may not have initialized whatever it needs to | |
434 | // initialize), then keep calling this routine periodically until it has. | |
435 | if (/MSIE/.test(navigator.userAgent) && !window.opera && | |
436 | typeof(G_vmlCanvasManager) != 'undefined' && | |
437 | document.readyState != 'complete') { | |
438 | var self = this; | |
758a629f | 439 | setTimeout(function() { self.__init__(div, file, attrs); }, 100); |
ccd9d7c2 | 440 | return; |
a2c8fff4 DV |
441 | } |
442 | ||
285a6bda | 443 | // Support two-argument constructor |
758a629f | 444 | if (attrs === null || attrs === undefined) { attrs = {}; } |
285a6bda | 445 | |
48e614ac DV |
446 | attrs = Dygraph.mapLegacyOptions_(attrs); |
447 | ||
8a870376 RK |
448 | if (typeof(div) == 'string') { |
449 | div = document.getElementById(div); | |
450 | } | |
451 | ||
48e614ac DV |
452 | if (!div) { |
453 | Dygraph.error("Constructing dygraph with a non-existent div!"); | |
454 | return; | |
455 | } | |
456 | ||
920208fb PF |
457 | this.isUsingExcanvas_ = typeof(G_vmlCanvasManager) != 'undefined'; |
458 | ||
6a1aa64f | 459 | // Copy the important bits into the object |
32988383 | 460 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
6a1aa64f | 461 | this.maindiv_ = div; |
6a1aa64f | 462 | this.file_ = file; |
285a6bda | 463 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
6a1aa64f | 464 | this.previousVerticalX_ = -1; |
6a1aa64f | 465 | this.fractions_ = attrs.fractions || false; |
6a1aa64f | 466 | this.dateWindow_ = attrs.dateWindow || null; |
8b83c6cc | 467 | |
5c528fa2 | 468 | this.annotations_ = []; |
7aedf6fe | 469 | |
45f2c689 | 470 | // Zoomed indicators - These indicate when the graph has been zoomed and on what axis. |
57baab03 NN |
471 | this.zoomed_x_ = false; |
472 | this.zoomed_y_ = false; | |
45f2c689 | 473 | |
f7d6278e DV |
474 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
475 | // div, then only one will be drawn. | |
476 | div.innerHTML = ""; | |
477 | ||
0cb9bd91 DV |
478 | // For historical reasons, the 'width' and 'height' options trump all CSS |
479 | // rules _except_ for an explicit 'width' or 'height' on the div. | |
480 | // As an added convenience, if the div has zero height (like <div></div> does | |
481 | // without any styles), then we use a default height/width. | |
758a629f | 482 | if (div.style.width === '' && attrs.width) { |
0cb9bd91 | 483 | div.style.width = attrs.width + "px"; |
285a6bda | 484 | } |
758a629f | 485 | if (div.style.height === '' && attrs.height) { |
0cb9bd91 | 486 | div.style.height = attrs.height + "px"; |
32988383 | 487 | } |
758a629f | 488 | if (div.style.height === '' && div.clientHeight === 0) { |
0cb9bd91 | 489 | div.style.height = Dygraph.DEFAULT_HEIGHT + "px"; |
758a629f | 490 | if (div.style.width === '') { |
0cb9bd91 DV |
491 | div.style.width = Dygraph.DEFAULT_WIDTH + "px"; |
492 | } | |
c21d2c2d | 493 | } |
c28088bc KW |
494 | // These will be zero if the dygraph's div is hidden. In that case, |
495 | // use the user-specified attributes if present. If not, use zero | |
496 | // and assume the user will call resize to fix things later. | |
497 | this.width_ = div.clientWidth || attrs.width || 0; | |
498 | this.height_ = div.clientHeight || attrs.height || 0; | |
32988383 | 499 | |
344ba8c0 | 500 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
758a629f DV |
501 | if (attrs.stackedGraph) { |
502 | attrs.fillGraph = true; | |
43af96e7 NK |
503 | // TODO(nikhilk): Add any other stackedGraph checks here. |
504 | } | |
505 | ||
a9172eb1 RK |
506 | // DEPRECATION WARNING: All option processing should be moved from |
507 | // attrs_ and user_attrs_ to options_, which holds all this information. | |
508 | // | |
285a6bda DV |
509 | // Dygraphs has many options, some of which interact with one another. |
510 | // To keep track of everything, we maintain two sets of options: | |
511 | // | |
c21d2c2d | 512 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
513 | // this.attrs_ defaults, options derived from user_attrs_, data. |
514 | // | |
515 | // Options are then accessed this.attr_('attr'), which first looks at | |
516 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
517 | // defaults without overriding behavior that the user specifically asks for. | |
518 | this.user_attrs_ = {}; | |
fc80a396 | 519 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 520 | |
48e614ac | 521 | // This sequence ensures that Dygraph.DEFAULT_ATTRS is never modified. |
285a6bda | 522 | this.attrs_ = {}; |
48e614ac | 523 | Dygraph.updateDeep(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 524 | |
16269f6e | 525 | this.boundaryIds_ = []; |
82c6fe4d | 526 | this.setIndexByName_ = {}; |
857a6931 | 527 | this.datasetIndex_ = []; |
6a1aa64f | 528 | |
6a4587ac | 529 | this.registeredEvents_ = []; |
de8f284f | 530 | this.eventListeners_ = {}; |
6a4587ac | 531 | |
c1780ad0 RK |
532 | this.attributes_ = new DygraphOptions(this); |
533 | ||
6a1aa64f DV |
534 | // Create the containing DIV and other interactive elements |
535 | this.createInterface_(); | |
536 | ||
e2c21500 DV |
537 | // Activate plugins. |
538 | this.plugins_ = []; | |
d9fbba56 RK |
539 | var plugins = Dygraph.PLUGINS.concat(this.getOption('plugins')); |
540 | for (var i = 0; i < plugins.length; i++) { | |
541 | var Plugin = plugins[i]; | |
42a9ebb8 | 542 | var pluginInstance = new Plugin(); |
e2c21500 DV |
543 | var pluginDict = { |
544 | plugin: pluginInstance, | |
545 | events: {}, | |
546 | options: {}, | |
547 | pluginOptions: {} | |
548 | }; | |
549 | ||
6a4457b4 KW |
550 | var handlers = pluginInstance.activate(this); |
551 | for (var eventName in handlers) { | |
28aa77ac | 552 | // TODO(danvk): validate eventName. |
6a4457b4 KW |
553 | pluginDict.events[eventName] = handlers[eventName]; |
554 | } | |
e2c21500 DV |
555 | |
556 | this.plugins_.push(pluginDict); | |
557 | } | |
558 | ||
559 | // At this point, plugins can no longer register event handlers. | |
560 | // Construct a map from event -> ordered list of [callback, plugin]. | |
e2c21500 DV |
561 | for (var i = 0; i < this.plugins_.length; i++) { |
562 | var plugin_dict = this.plugins_[i]; | |
563 | for (var eventName in plugin_dict.events) { | |
564 | if (!plugin_dict.events.hasOwnProperty(eventName)) continue; | |
565 | var callback = plugin_dict.events[eventName]; | |
566 | ||
567 | var pair = [plugin_dict.plugin, callback]; | |
568 | if (!(eventName in this.eventListeners_)) { | |
569 | this.eventListeners_[eventName] = [pair]; | |
570 | } else { | |
571 | this.eventListeners_[eventName].push(pair); | |
572 | } | |
573 | } | |
574 | } | |
575 | ||
487f5523 PF |
576 | this.createDragInterface_(); |
577 | ||
738fc797 | 578 | this.start_(); |
6a1aa64f DV |
579 | }; |
580 | ||
dcb25130 | 581 | /** |
e2c21500 DV |
582 | * Triggers a cascade of events to the various plugins which are interested in them. |
583 | * Returns true if the "default behavior" should be performed, i.e. if none of | |
584 | * the event listeners called event.preventDefault(). | |
585 | * @private | |
586 | */ | |
587 | Dygraph.prototype.cascadeEvents_ = function(name, extra_props) { | |
42a9ebb8 | 588 | if (!(name in this.eventListeners_)) return true; |
e2c21500 DV |
589 | |
590 | // QUESTION: can we use objects & prototypes to speed this up? | |
591 | var e = { | |
592 | dygraph: this, | |
593 | cancelable: false, | |
594 | defaultPrevented: false, | |
595 | preventDefault: function() { | |
596 | if (!e.cancelable) throw "Cannot call preventDefault on non-cancelable event."; | |
597 | e.defaultPrevented = true; | |
598 | }, | |
599 | propagationStopped: false, | |
600 | stopPropagation: function() { | |
5bd29cf4 | 601 | e.propagationStopped = true; |
e2c21500 DV |
602 | } |
603 | }; | |
604 | Dygraph.update(e, extra_props); | |
605 | ||
606 | var callback_plugin_pairs = this.eventListeners_[name]; | |
da1c187b KW |
607 | if (callback_plugin_pairs) { |
608 | for (var i = callback_plugin_pairs.length - 1; i >= 0; i--) { | |
609 | var plugin = callback_plugin_pairs[i][0]; | |
610 | var callback = callback_plugin_pairs[i][1]; | |
611 | callback.call(plugin, e); | |
612 | if (e.propagationStopped) break; | |
613 | } | |
e2c21500 DV |
614 | } |
615 | return e.defaultPrevented; | |
616 | }; | |
617 | ||
618 | /** | |
b1a96215 DV |
619 | * Fetch a plugin instance of a particular class. Only for testing. |
620 | * @private | |
621 | * @param {!Class} type The type of the plugin. | |
622 | * @return {Object} Instance of the plugin, or null if there is none. | |
623 | */ | |
624 | Dygraph.prototype.getPluginInstance_ = function(type) { | |
625 | for (var i = 0; i < this.plugins_.length; i++) { | |
626 | var p = this.plugins_[i]; | |
627 | if (p.plugin instanceof type) { | |
628 | return p.plugin; | |
629 | } | |
630 | } | |
631 | return null; | |
632 | }; | |
633 | ||
634 | /** | |
dcb25130 NN |
635 | * Returns the zoomed status of the chart for one or both axes. |
636 | * | |
637 | * Axis is an optional parameter. Can be set to 'x' or 'y'. | |
638 | * | |
639 | * The zoomed status for an axis is set whenever a user zooms using the mouse | |
42a9ebb8 DV |
640 | * or when the dateWindow or valueRange are updated (unless the |
641 | * isZoomedIgnoreProgrammaticZoom option is also specified). | |
dcb25130 | 642 | */ |
57baab03 | 643 | Dygraph.prototype.isZoomed = function(axis) { |
42a9ebb8 DV |
644 | if (axis === null || axis === undefined) { |
645 | return this.zoomed_x_ || this.zoomed_y_; | |
646 | } | |
758a629f DV |
647 | if (axis === 'x') return this.zoomed_x_; |
648 | if (axis === 'y') return this.zoomed_y_; | |
94ea5744 | 649 | throw "axis parameter is [" + axis + "] must be null, 'x' or 'y'."; |
57baab03 NN |
650 | }; |
651 | ||
629a09ae DV |
652 | /** |
653 | * Returns information about the Dygraph object, including its containing ID. | |
654 | */ | |
22bd1dfb RK |
655 | Dygraph.prototype.toString = function() { |
656 | var maindiv = this.maindiv_; | |
758a629f | 657 | var id = (maindiv && maindiv.id) ? maindiv.id : maindiv; |
22bd1dfb | 658 | return "[Dygraph " + id + "]"; |
758a629f | 659 | }; |
22bd1dfb | 660 | |
629a09ae DV |
661 | /** |
662 | * @private | |
663 | * Returns the value of an option. This may be set by the user (either in the | |
664 | * constructor or by calling updateOptions) or by dygraphs, and may be set to a | |
665 | * per-series value. | |
1bc88216 DV |
666 | * @param {string} name The name of the option, e.g. 'rollPeriod'. |
667 | * @param {string} [seriesName] The name of the series to which the option | |
629a09ae DV |
668 | * will be applied. If no per-series value of this option is available, then |
669 | * the global value is returned. This is optional. | |
670 | * @return { ... } The value of the option. | |
671 | */ | |
227b93cc | 672 | Dygraph.prototype.attr_ = function(name, seriesName) { |
028ddf8a DV |
673 | // <REMOVE_FOR_COMBINED> |
674 | if (typeof(Dygraph.OPTIONS_REFERENCE) === 'undefined') { | |
464b5f50 | 675 | Dygraph.error('Must include options reference JS for testing'); |
028ddf8a | 676 | } else if (!Dygraph.OPTIONS_REFERENCE.hasOwnProperty(name)) { |
464b5f50 DV |
677 | Dygraph.error('Dygraphs is using property ' + name + ', which has no ' + |
678 | 'entry in the Dygraphs.OPTIONS_REFERENCE listing.'); | |
028ddf8a DV |
679 | // Only log this error once. |
680 | Dygraph.OPTIONS_REFERENCE[name] = true; | |
681 | } | |
682 | // </REMOVE_FOR_COMBINED> | |
5daa462d | 683 | return seriesName ? this.attributes_.getForSeries(name, seriesName) : this.attributes_.get(name); |
285a6bda DV |
684 | }; |
685 | ||
6a1aa64f | 686 | /** |
e2c21500 DV |
687 | * Returns the current value for an option, as set in the constructor or via |
688 | * updateOptions. You may pass in an (optional) series name to get per-series | |
689 | * values for the option. | |
690 | * | |
691 | * All values returned by this method should be considered immutable. If you | |
692 | * modify them, there is no guarantee that the changes will be honored or that | |
693 | * dygraphs will remain in a consistent state. If you want to modify an option, | |
694 | * use updateOptions() instead. | |
695 | * | |
1bc88216 DV |
696 | * @param {string} name The name of the option (e.g. 'strokeWidth') |
697 | * @param {string=} opt_seriesName Series name to get per-series values. | |
698 | * @return {*} The value of the option. | |
e2c21500 DV |
699 | */ |
700 | Dygraph.prototype.getOption = function(name, opt_seriesName) { | |
701 | return this.attr_(name, opt_seriesName); | |
702 | }; | |
703 | ||
5266fc00 | 704 | /** |
1c420f2f | 705 | * Like getOption(), but specifically returns a number. |
5266fc00 DV |
706 | * This is a convenience function for working with the Closure Compiler. |
707 | * @param {string} name The name of the option (e.g. 'strokeWidth') | |
708 | * @param {string=} opt_seriesName Series name to get per-series values. | |
709 | * @return {number} The value of the option. | |
710 | * @private | |
711 | */ | |
712 | Dygraph.prototype.getNumericOption = function(name, opt_seriesName) { | |
713 | return /** @type{number} */(this.getOption(name, opt_seriesName)); | |
714 | }; | |
715 | ||
716 | /** | |
1c420f2f | 717 | * Like getOption(), but specifically returns a string. |
5266fc00 DV |
718 | * This is a convenience function for working with the Closure Compiler. |
719 | * @param {string} name The name of the option (e.g. 'strokeWidth') | |
720 | * @param {string=} opt_seriesName Series name to get per-series values. | |
721 | * @return {string} The value of the option. | |
722 | * @private | |
723 | */ | |
724 | Dygraph.prototype.getStringOption = function(name, opt_seriesName) { | |
725 | return /** @type{string} */(this.getOption(name, opt_seriesName)); | |
726 | }; | |
727 | ||
728 | /** | |
1c420f2f | 729 | * Like getOption(), but specifically returns a boolean. |
5266fc00 DV |
730 | * This is a convenience function for working with the Closure Compiler. |
731 | * @param {string} name The name of the option (e.g. 'strokeWidth') | |
732 | * @param {string=} opt_seriesName Series name to get per-series values. | |
733 | * @return {boolean} The value of the option. | |
734 | * @private | |
735 | */ | |
736 | Dygraph.prototype.getBooleanOption = function(name, opt_seriesName) { | |
737 | return /** @type{boolean} */(this.getOption(name, opt_seriesName)); | |
738 | }; | |
739 | ||
740 | /** | |
1c420f2f | 741 | * Like getOption(), but specifically returns a function. |
5266fc00 DV |
742 | * This is a convenience function for working with the Closure Compiler. |
743 | * @param {string} name The name of the option (e.g. 'strokeWidth') | |
744 | * @param {string=} opt_seriesName Series name to get per-series values. | |
745 | * @return {function(...)} The value of the option. | |
746 | * @private | |
747 | */ | |
748 | Dygraph.prototype.getFunctionOption = function(name, opt_seriesName) { | |
749 | return /** @type{function(...)} */(this.getOption(name, opt_seriesName)); | |
750 | }; | |
751 | ||
48dc3815 RK |
752 | Dygraph.prototype.getOptionForAxis = function(name, axis) { |
753 | return this.attributes_.getForAxis(name, axis); | |
83b0c192 DV |
754 | }; |
755 | ||
e2c21500 | 756 | /** |
48e614ac | 757 | * @private |
5266fc00 | 758 | * @param {string} axis The name of the axis (i.e. 'x', 'y' or 'y2') |
48e614ac DV |
759 | * @return { ... } A function mapping string -> option value |
760 | */ | |
761 | Dygraph.prototype.optionsViewForAxis_ = function(axis) { | |
762 | var self = this; | |
763 | return function(opt) { | |
758a629f | 764 | var axis_opts = self.user_attrs_.axes; |
2fd143d3 | 765 | if (axis_opts && axis_opts[axis] && axis_opts[axis].hasOwnProperty(opt)) { |
48e614ac DV |
766 | return axis_opts[axis][opt]; |
767 | } | |
5b9b2142 RK |
768 | |
769 | // I don't like that this is in a second spot. | |
770 | if (axis === 'x' && opt === 'logscale') { | |
771 | // return the default value. | |
772 | // TODO(konigsberg): pull the default from a global default. | |
773 | return false; | |
774 | } | |
775 | ||
48e614ac DV |
776 | // user-specified attributes always trump defaults, even if they're less |
777 | // specific. | |
778 | if (typeof(self.user_attrs_[opt]) != 'undefined') { | |
779 | return self.user_attrs_[opt]; | |
780 | } | |
781 | ||
758a629f | 782 | axis_opts = self.attrs_.axes; |
2fd143d3 | 783 | if (axis_opts && axis_opts[axis] && axis_opts[axis].hasOwnProperty(opt)) { |
48e614ac DV |
784 | return axis_opts[axis][opt]; |
785 | } | |
786 | // check old-style axis options | |
787 | // TODO(danvk): add a deprecation warning if either of these match. | |
788 | if (axis == 'y' && self.axes_[0].hasOwnProperty(opt)) { | |
789 | return self.axes_[0][opt]; | |
790 | } else if (axis == 'y2' && self.axes_[1].hasOwnProperty(opt)) { | |
791 | return self.axes_[1][opt]; | |
792 | } | |
793 | return self.attr_(opt); | |
794 | }; | |
795 | }; | |
796 | ||
797 | /** | |
6a1aa64f | 798 | * Returns the current rolling period, as set by the user or an option. |
1bc88216 | 799 | * @return {number} The number of points in the rolling window |
6a1aa64f | 800 | */ |
285a6bda | 801 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 802 | return this.rollPeriod_; |
76171648 DV |
803 | }; |
804 | ||
599fb4ad DV |
805 | /** |
806 | * Returns the currently-visible x-range. This can be affected by zooming, | |
807 | * panning or a call to updateOptions. | |
808 | * Returns a two-element array: [left, right]. | |
809 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
810 | */ | |
811 | Dygraph.prototype.xAxisRange = function() { | |
4cac8c7a RK |
812 | return this.dateWindow_ ? this.dateWindow_ : this.xAxisExtremes(); |
813 | }; | |
599fb4ad | 814 | |
4cac8c7a RK |
815 | /** |
816 | * Returns the lower- and upper-bound x-axis values of the | |
817 | * data set. | |
818 | */ | |
819 | Dygraph.prototype.xAxisExtremes = function() { | |
b0963cdb | 820 | var pad = this.getNumericOption('xRangePad') / this.plotter_.area.w; |
4bac38d8 | 821 | if (this.numRows() === 0) { |
fa460473 KW |
822 | return [0 - pad, 1 + pad]; |
823 | } | |
599fb4ad DV |
824 | var left = this.rawData_[0][0]; |
825 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
fa460473 KW |
826 | if (pad) { |
827 | // Must keep this in sync with dygraph-layout _evaluateLimits() | |
828 | var range = right - left; | |
829 | left -= range * pad; | |
830 | right += range * pad; | |
831 | } | |
599fb4ad DV |
832 | return [left, right]; |
833 | }; | |
834 | ||
3230c662 | 835 | /** |
d58ae307 DV |
836 | * Returns the currently-visible y-range for an axis. This can be affected by |
837 | * zooming, panning or a call to updateOptions. Axis indices are zero-based. If | |
838 | * called with no arguments, returns the range of the first axis. | |
3230c662 DV |
839 | * Returns a two-element array: [bottom, top]. |
840 | */ | |
d58ae307 | 841 | Dygraph.prototype.yAxisRange = function(idx) { |
d63e6799 | 842 | if (typeof(idx) == "undefined") idx = 0; |
d64b8fea RK |
843 | if (idx < 0 || idx >= this.axes_.length) { |
844 | return null; | |
845 | } | |
846 | var axis = this.axes_[idx]; | |
847 | return [ axis.computedValueRange[0], axis.computedValueRange[1] ]; | |
d58ae307 DV |
848 | }; |
849 | ||
850 | /** | |
851 | * Returns the currently-visible y-ranges for each axis. This can be affected by | |
852 | * zooming, panning, calls to updateOptions, etc. | |
853 | * Returns an array of [bottom, top] pairs, one for each y-axis. | |
854 | */ | |
855 | Dygraph.prototype.yAxisRanges = function() { | |
856 | var ret = []; | |
857 | for (var i = 0; i < this.axes_.length; i++) { | |
858 | ret.push(this.yAxisRange(i)); | |
859 | } | |
860 | return ret; | |
3230c662 DV |
861 | }; |
862 | ||
d58ae307 | 863 | // TODO(danvk): use these functions throughout dygraphs. |
3230c662 DV |
864 | /** |
865 | * Convert from data coordinates to canvas/div X/Y coordinates. | |
d58ae307 DV |
866 | * If specified, do this conversion for the coordinate system of a particular |
867 | * axis. Uses the first axis by default. | |
3230c662 | 868 | * Returns a two-element array: [X, Y] |
ff022deb | 869 | * |
0747928a | 870 | * Note: use toDomXCoord instead of toDomCoords(x, null) and use toDomYCoord |
ff022deb | 871 | * instead of toDomCoords(null, y, axis). |
3230c662 | 872 | */ |
d58ae307 | 873 | Dygraph.prototype.toDomCoords = function(x, y, axis) { |
ff022deb RK |
874 | return [ this.toDomXCoord(x), this.toDomYCoord(y, axis) ]; |
875 | }; | |
876 | ||
877 | /** | |
878 | * Convert from data x coordinates to canvas/div X coordinate. | |
879 | * If specified, do this conversion for the coordinate system of a particular | |
0037b2a4 RK |
880 | * axis. |
881 | * Returns a single value or null if x is null. | |
ff022deb RK |
882 | */ |
883 | Dygraph.prototype.toDomXCoord = function(x) { | |
758a629f | 884 | if (x === null) { |
ff022deb | 885 | return null; |
758a629f | 886 | } |
ff022deb | 887 | |
3230c662 | 888 | var area = this.plotter_.area; |
ff022deb RK |
889 | var xRange = this.xAxisRange(); |
890 | return area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; | |
758a629f | 891 | }; |
3230c662 | 892 | |
ff022deb RK |
893 | /** |
894 | * Convert from data x coordinates to canvas/div Y coordinate and optional | |
895 | * axis. Uses the first axis by default. | |
896 | * | |
897 | * returns a single value or null if y is null. | |
898 | */ | |
899 | Dygraph.prototype.toDomYCoord = function(y, axis) { | |
0747928a | 900 | var pct = this.toPercentYCoord(y, axis); |
3230c662 | 901 | |
758a629f | 902 | if (pct === null) { |
ff022deb RK |
903 | return null; |
904 | } | |
e4416fb9 | 905 | var area = this.plotter_.area; |
ff022deb | 906 | return area.y + pct * area.h; |
758a629f | 907 | }; |
3230c662 DV |
908 | |
909 | /** | |
910 | * Convert from canvas/div coords to data coordinates. | |
d58ae307 DV |
911 | * If specified, do this conversion for the coordinate system of a particular |
912 | * axis. Uses the first axis by default. | |
ff022deb RK |
913 | * Returns a two-element array: [X, Y]. |
914 | * | |
0747928a | 915 | * Note: use toDataXCoord instead of toDataCoords(x, null) and use toDataYCoord |
ff022deb | 916 | * instead of toDataCoords(null, y, axis). |
3230c662 | 917 | */ |
d58ae307 | 918 | Dygraph.prototype.toDataCoords = function(x, y, axis) { |
ff022deb RK |
919 | return [ this.toDataXCoord(x), this.toDataYCoord(y, axis) ]; |
920 | }; | |
921 | ||
922 | /** | |
923 | * Convert from canvas/div x coordinate to data coordinate. | |
924 | * | |
925 | * If x is null, this returns null. | |
926 | */ | |
927 | Dygraph.prototype.toDataXCoord = function(x) { | |
758a629f | 928 | if (x === null) { |
ff022deb | 929 | return null; |
3230c662 DV |
930 | } |
931 | ||
ff022deb RK |
932 | var area = this.plotter_.area; |
933 | var xRange = this.xAxisRange(); | |
5b9b2142 RK |
934 | |
935 | if (!this.attributes_.getForAxis("logscale", 'x')) { | |
936 | return xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); | |
937 | } else { | |
938 | // TODO: remove duplicate code? | |
939 | // Computing the inverse of toDomCoord. | |
940 | var pct = (x - area.x) / area.w; | |
941 | ||
942 | // Computing the inverse of toPercentXCoord. The function was arrived at with | |
943 | // the following steps: | |
944 | // | |
945 | // Original calcuation: | |
946 | // pct = (log(x) - log(xRange[0])) / (log(xRange[1]) - log(xRange[0]))); | |
947 | // | |
948 | // Multiply both sides by the right-side demoninator. | |
949 | // pct * (log(xRange[1] - log(xRange[0]))) = log(x) - log(xRange[0]) | |
950 | // | |
951 | // add log(xRange[0]) to both sides | |
952 | // log(xRange[0]) + (pct * (log(xRange[1]) - log(xRange[0])) = log(x); | |
953 | // | |
954 | // Swap both sides of the equation, | |
955 | // log(x) = log(xRange[0]) + (pct * (log(xRange[1]) - log(xRange[0])) | |
956 | // | |
957 | // Use both sides as the exponent in 10^exp and we're done. | |
958 | // x = 10 ^ (log(xRange[0]) + (pct * (log(xRange[1]) - log(xRange[0]))) | |
959 | var logr0 = Dygraph.log10(xRange[0]); | |
960 | var logr1 = Dygraph.log10(xRange[1]); | |
961 | var exponent = logr0 + (pct * (logr1 - logr0)); | |
962 | var value = Math.pow(Dygraph.LOG_SCALE, exponent); | |
963 | return value; | |
964 | } | |
ff022deb RK |
965 | }; |
966 | ||
967 | /** | |
968 | * Convert from canvas/div y coord to value. | |
969 | * | |
970 | * If y is null, this returns null. | |
971 | * if axis is null, this uses the first axis. | |
972 | */ | |
973 | Dygraph.prototype.toDataYCoord = function(y, axis) { | |
758a629f | 974 | if (y === null) { |
ff022deb | 975 | return null; |
3230c662 DV |
976 | } |
977 | ||
ff022deb RK |
978 | var area = this.plotter_.area; |
979 | var yRange = this.yAxisRange(axis); | |
980 | ||
b70247dc | 981 | if (typeof(axis) == "undefined") axis = 0; |
1f8c95d8 | 982 | if (!this.attributes_.getForAxis("logscale", axis)) { |
d9816e62 | 983 | return yRange[0] + (area.y + area.h - y) / area.h * (yRange[1] - yRange[0]); |
ff022deb RK |
984 | } else { |
985 | // Computing the inverse of toDomCoord. | |
758a629f | 986 | var pct = (y - area.y) / area.h; |
ff022deb RK |
987 | |
988 | // Computing the inverse of toPercentYCoord. The function was arrived at with | |
989 | // the following steps: | |
990 | // | |
991 | // Original calcuation: | |
5b9b2142 | 992 | // pct = (log(yRange[1]) - log(y)) / (log(yRange[1]) - log(yRange[0])); |
ff022deb | 993 | // |
5b9b2142 RK |
994 | // Multiply both sides by the right-side demoninator. |
995 | // pct * (log(yRange[1]) - log(yRange[0])) = log(yRange[1]) - log(y); | |
ff022deb | 996 | // |
5b9b2142 RK |
997 | // subtract log(yRange[1]) from both sides. |
998 | // (pct * (log(yRange[1]) - log(yRange[0]))) - log(yRange[1]) = -log(y); | |
ff022deb | 999 | // |
5b9b2142 RK |
1000 | // and multiply both sides by -1. |
1001 | // log(yRange[1]) - (pct * (logr1 - log(yRange[0])) = log(y); | |
1002 | // | |
1003 | // Swap both sides of the equation, | |
1004 | // log(y) = log(yRange[1]) - (pct * (log(yRange[1]) - log(yRange[0]))); | |
1005 | // | |
1006 | // Use both sides as the exponent in 10^exp and we're done. | |
1007 | // y = 10 ^ (log(yRange[1]) - (pct * (log(yRange[1]) - log(yRange[0])))); | |
1008 | var logr0 = Dygraph.log10(yRange[0]); | |
d59b6f34 | 1009 | var logr1 = Dygraph.log10(yRange[1]); |
5b9b2142 | 1010 | var exponent = logr1 - (pct * (logr1 - logr0)); |
d59b6f34 | 1011 | var value = Math.pow(Dygraph.LOG_SCALE, exponent); |
ff022deb RK |
1012 | return value; |
1013 | } | |
3230c662 DV |
1014 | }; |
1015 | ||
e99fde05 | 1016 | /** |
ff022deb | 1017 | * Converts a y for an axis to a percentage from the top to the |
4cac8c7a | 1018 | * bottom of the drawing area. |
ff022deb RK |
1019 | * |
1020 | * If the coordinate represents a value visible on the canvas, then | |
1021 | * the value will be between 0 and 1, where 0 is the top of the canvas. | |
1022 | * However, this method will return values outside the range, as | |
1023 | * values can fall outside the canvas. | |
1024 | * | |
1025 | * If y is null, this returns null. | |
1026 | * if axis is null, this uses the first axis. | |
629a09ae | 1027 | * |
1bc88216 DV |
1028 | * @param {number} y The data y-coordinate. |
1029 | * @param {number} [axis] The axis number on which the data coordinate lives. | |
1030 | * @return {number} A fraction in [0, 1] where 0 = the top edge. | |
ff022deb RK |
1031 | */ |
1032 | Dygraph.prototype.toPercentYCoord = function(y, axis) { | |
758a629f | 1033 | if (y === null) { |
ff022deb RK |
1034 | return null; |
1035 | } | |
7d0e7a0d | 1036 | if (typeof(axis) == "undefined") axis = 0; |
ff022deb | 1037 | |
ff022deb RK |
1038 | var yRange = this.yAxisRange(axis); |
1039 | ||
1040 | var pct; | |
1761e6ed | 1041 | var logscale = this.attributes_.getForAxis("logscale", axis); |
5b9b2142 RK |
1042 | if (logscale) { |
1043 | var logr0 = Dygraph.log10(yRange[0]); | |
1044 | var logr1 = Dygraph.log10(yRange[1]); | |
1045 | pct = (logr1 - Dygraph.log10(y)) / (logr1 - logr0); | |
1046 | } else { | |
4cac8c7a RK |
1047 | // yRange[1] - y is unit distance from the bottom. |
1048 | // yRange[1] - yRange[0] is the scale of the range. | |
ff022deb RK |
1049 | // (yRange[1] - y) / (yRange[1] - yRange[0]) is the % from the bottom. |
1050 | pct = (yRange[1] - y) / (yRange[1] - yRange[0]); | |
ff022deb RK |
1051 | } |
1052 | return pct; | |
758a629f | 1053 | }; |
ff022deb RK |
1054 | |
1055 | /** | |
4cac8c7a RK |
1056 | * Converts an x value to a percentage from the left to the right of |
1057 | * the drawing area. | |
1058 | * | |
1059 | * If the coordinate represents a value visible on the canvas, then | |
1060 | * the value will be between 0 and 1, where 0 is the left of the canvas. | |
1061 | * However, this method will return values outside the range, as | |
1062 | * values can fall outside the canvas. | |
1063 | * | |
1064 | * If x is null, this returns null. | |
1bc88216 DV |
1065 | * @param {number} x The data x-coordinate. |
1066 | * @return {number} A fraction in [0, 1] where 0 = the left edge. | |
4cac8c7a RK |
1067 | */ |
1068 | Dygraph.prototype.toPercentXCoord = function(x) { | |
758a629f | 1069 | if (x === null) { |
4cac8c7a RK |
1070 | return null; |
1071 | } | |
1072 | ||
4cac8c7a | 1073 | var xRange = this.xAxisRange(); |
5b9b2142 RK |
1074 | var pct; |
1075 | var logscale = this.attributes_.getForAxis("logscale", 'x') ; | |
1076 | if (logscale == true) { // logscale can be null so we test for true explicitly. | |
1077 | var logr0 = Dygraph.log10(xRange[0]); | |
1078 | var logr1 = Dygraph.log10(xRange[1]); | |
1079 | pct = (Dygraph.log10(x) - logr0) / (logr1 - logr0); | |
1080 | } else { | |
1081 | // x - xRange[0] is unit distance from the left. | |
1082 | // xRange[1] - xRange[0] is the scale of the range. | |
1083 | // The full expression below is the % from the left. | |
1084 | pct = (x - xRange[0]) / (xRange[1] - xRange[0]); | |
1085 | } | |
1086 | return pct; | |
629a09ae | 1087 | }; |
4cac8c7a RK |
1088 | |
1089 | /** | |
e99fde05 | 1090 | * Returns the number of columns (including the independent variable). |
1bc88216 | 1091 | * @return {number} The number of columns. |
e99fde05 DV |
1092 | */ |
1093 | Dygraph.prototype.numColumns = function() { | |
fa460473 | 1094 | if (!this.rawData_) return 0; |
395e98a3 | 1095 | return this.rawData_[0] ? this.rawData_[0].length : this.attr_("labels").length; |
e99fde05 DV |
1096 | }; |
1097 | ||
1098 | /** | |
1099 | * Returns the number of rows (excluding any header/label row). | |
1bc88216 | 1100 | * @return {number} The number of rows, less any header. |
e99fde05 DV |
1101 | */ |
1102 | Dygraph.prototype.numRows = function() { | |
fa460473 | 1103 | if (!this.rawData_) return 0; |
e99fde05 DV |
1104 | return this.rawData_.length; |
1105 | }; | |
1106 | ||
1107 | /** | |
1108 | * Returns the value in the given row and column. If the row and column exceed | |
1109 | * the bounds on the data, returns null. Also returns null if the value is | |
1110 | * missing. | |
1bc88216 DV |
1111 | * @param {number} row The row number of the data (0-based). Row 0 is the |
1112 | * first row of data, not a header row. | |
1113 | * @param {number} col The column number of the data (0-based) | |
1114 | * @return {number} The value in the specified cell or null if the row/col | |
1115 | * were out of range. | |
e99fde05 DV |
1116 | */ |
1117 | Dygraph.prototype.getValue = function(row, col) { | |
1118 | if (row < 0 || row > this.rawData_.length) return null; | |
1119 | if (col < 0 || col > this.rawData_[row].length) return null; | |
1120 | ||
1121 | return this.rawData_[row][col]; | |
1122 | }; | |
1123 | ||
629a09ae | 1124 | /** |
285a6bda | 1125 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 1126 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 1127 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
1128 | * @private |
1129 | */ | |
285a6bda | 1130 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
1131 | // Create the all-enclosing graph div |
1132 | var enclosing = this.maindiv_; | |
1133 | ||
b0c3b730 | 1134 | this.graphDiv = document.createElement("div"); |
aeca29ac | 1135 | |
e0629007 DV |
1136 | // TODO(danvk): any other styles that are useful to set here? |
1137 | this.graphDiv.style.textAlign = 'left'; // This is a CSS "reset" | |
cb8bb6a6 | 1138 | this.graphDiv.style.position = 'relative'; |
b0c3b730 DV |
1139 | enclosing.appendChild(this.graphDiv); |
1140 | ||
1141 | // Create the canvas for interactive parts of the chart. | |
f8cfec73 | 1142 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 | 1143 | this.canvas_.style.position = "absolute"; |
aeca29ac | 1144 | |
c28088bc KW |
1145 | // ... and for static parts of the chart. |
1146 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); | |
1147 | ||
2cf95fff | 1148 | this.canvas_ctx_ = Dygraph.getContext(this.canvas_); |
2cf95fff | 1149 | this.hidden_ctx_ = Dygraph.getContext(this.hidden_); |
76171648 | 1150 | |
37819481 PH |
1151 | this.resizeElements_(); |
1152 | ||
eb7bf005 EC |
1153 | // The interactive parts of the graph are drawn on top of the chart. |
1154 | this.graphDiv.appendChild(this.hidden_); | |
1155 | this.graphDiv.appendChild(this.canvas_); | |
920208fb PF |
1156 | this.mouseEventElement_ = this.createMouseEventElement_(); |
1157 | ||
1158 | // Create the grapher | |
1159 | this.layout_ = new DygraphLayout(this); | |
1160 | ||
76171648 | 1161 | var dygraph = this; |
de8f284f | 1162 | |
9fd9bbbb | 1163 | this.mouseMoveHandler_ = function(e) { |
1164 | dygraph.mouseMove_(e); | |
1165 | }; | |
de8f284f | 1166 | |
9fd9bbbb | 1167 | this.mouseOutHandler_ = function(e) { |
def24194 DV |
1168 | // The mouse has left the chart if: |
1169 | // 1. e.target is inside the chart | |
1170 | // 2. e.relatedTarget is outside the chart | |
1171 | var target = e.target || e.fromElement; | |
1172 | var relatedTarget = e.relatedTarget || e.toElement; | |
bcb545f4 LB |
1173 | if (Dygraph.isNodeContainedBy(target, dygraph.graphDiv) && |
1174 | !Dygraph.isNodeContainedBy(relatedTarget, dygraph.graphDiv)) { | |
def24194 DV |
1175 | dygraph.mouseOut_(e); |
1176 | } | |
9fd9bbbb | 1177 | }; |
1178 | ||
aeca29ac RK |
1179 | this.addAndTrackEvent(window, 'mouseout', this.mouseOutHandler_); |
1180 | this.addAndTrackEvent(this.mouseEventElement_, 'mousemove', this.mouseMoveHandler_); | |
697e70b2 | 1181 | |
9fd9bbbb | 1182 | // Don't recreate and register the resize handler on subsequent calls. |
1183 | // This happens when the graph is resized. | |
1184 | if (!this.resizeHandler_) { | |
e0b3afad RK |
1185 | this.resizeHandler_ = function(e) { |
1186 | dygraph.resize(); | |
1187 | }; | |
1c6b239c | 1188 | |
e0b3afad RK |
1189 | // Update when the window is resized. |
1190 | // TODO(danvk): drop frames depending on complexity of the chart. | |
aeca29ac | 1191 | this.addAndTrackEvent(window, 'resize', this.resizeHandler_); |
e0b3afad | 1192 | } |
4cfcc38c DV |
1193 | }; |
1194 | ||
aeca29ac RK |
1195 | Dygraph.prototype.resizeElements_ = function() { |
1196 | this.graphDiv.style.width = this.width_ + "px"; | |
1197 | this.graphDiv.style.height = this.height_ + "px"; | |
37819481 PH |
1198 | |
1199 | var canvasScale = Dygraph.getContextPixelRatio(this.canvas_ctx_); | |
1200 | this.canvas_.width = this.width_ * canvasScale; | |
1201 | this.canvas_.height = this.height_ * canvasScale; | |
aeca29ac RK |
1202 | this.canvas_.style.width = this.width_ + "px"; // for IE |
1203 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
37819481 PH |
1204 | if (canvasScale !== 1) { |
1205 | this.canvas_ctx_.scale(canvasScale, canvasScale); | |
1206 | } | |
1207 | ||
1208 | var hiddenScale = Dygraph.getContextPixelRatio(this.hidden_ctx_); | |
1209 | this.hidden_.width = this.width_ * hiddenScale; | |
1210 | this.hidden_.height = this.height_ * hiddenScale; | |
c28088bc KW |
1211 | this.hidden_.style.width = this.width_ + "px"; // for IE |
1212 | this.hidden_.style.height = this.height_ + "px"; // for IE | |
37819481 PH |
1213 | if (hiddenScale !== 1) { |
1214 | this.hidden_ctx_.scale(hiddenScale, hiddenScale); | |
1215 | } | |
f914bed1 | 1216 | }; |
aeca29ac | 1217 | |
4cfcc38c DV |
1218 | /** |
1219 | * Detach DOM elements in the dygraph and null out all data references. | |
1220 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
1221 | * usage. See, e.g., the tests/perf.html example. | |
1222 | */ | |
1223 | Dygraph.prototype.destroy = function() { | |
aeca29ac RK |
1224 | this.canvas_ctx_.restore(); |
1225 | this.hidden_ctx_.restore(); | |
1226 | ||
4cfcc38c DV |
1227 | var removeRecursive = function(node) { |
1228 | while (node.hasChildNodes()) { | |
1229 | removeRecursive(node.firstChild); | |
1230 | node.removeChild(node.firstChild); | |
1231 | } | |
1232 | }; | |
de8f284f | 1233 | |
aeca29ac | 1234 | this.removeTrackedEvents_(); |
6a4587ac RK |
1235 | |
1236 | // remove mouse event handlers (This may not be necessary anymore) | |
def24194 | 1237 | Dygraph.removeEvent(window, 'mouseout', this.mouseOutHandler_); |
7d6df48d | 1238 | Dygraph.removeEvent(this.mouseEventElement_, 'mousemove', this.mouseMoveHandler_); |
7d6df48d RK |
1239 | |
1240 | // remove window handlers | |
1241 | Dygraph.removeEvent(window,'resize',this.resizeHandler_); | |
1242 | this.resizeHandler_ = null; | |
1243 | ||
4cfcc38c DV |
1244 | removeRecursive(this.maindiv_); |
1245 | ||
1246 | var nullOut = function(obj) { | |
1247 | for (var n in obj) { | |
1248 | if (typeof(obj[n]) === 'object') { | |
1249 | obj[n] = null; | |
1250 | } | |
1251 | } | |
1252 | }; | |
4cfcc38c DV |
1253 | // These may not all be necessary, but it can't hurt... |
1254 | nullOut(this.layout_); | |
1255 | nullOut(this.plotter_); | |
1256 | nullOut(this); | |
1257 | }; | |
6a1aa64f DV |
1258 | |
1259 | /** | |
629a09ae DV |
1260 | * Creates the canvas on which the chart will be drawn. Only the Renderer ever |
1261 | * draws on this particular canvas. All Dygraph work (i.e. drawing hover dots | |
1262 | * or the zoom rectangles) is done on this.canvas_. | |
8846615a | 1263 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
1264 | * @return {Object} The newly-created canvas |
1265 | * @private | |
1266 | */ | |
285a6bda | 1267 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 | 1268 | var h = Dygraph.createCanvas(); |
6a1aa64f | 1269 | h.style.position = "absolute"; |
9ac5e4ae DV |
1270 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
1271 | // some extra area to make it easier to zoom in on the far left and far | |
1272 | // right. h needs to be precisely the plot area, so that clipping occurs. | |
6a1aa64f DV |
1273 | h.style.top = canvas.style.top; |
1274 | h.style.left = canvas.style.left; | |
1275 | h.width = this.width_; | |
1276 | h.height = this.height_; | |
f8cfec73 DV |
1277 | h.style.width = this.width_ + "px"; // for IE |
1278 | h.style.height = this.height_ + "px"; // for IE | |
6a1aa64f DV |
1279 | return h; |
1280 | }; | |
1281 | ||
629a09ae | 1282 | /** |
920208fb PF |
1283 | * Creates an overlay element used to handle mouse events. |
1284 | * @return {Object} The mouse event element. | |
1285 | * @private | |
1286 | */ | |
1287 | Dygraph.prototype.createMouseEventElement_ = function() { | |
1288 | if (this.isUsingExcanvas_) { | |
1289 | var elem = document.createElement("div"); | |
1290 | elem.style.position = 'absolute'; | |
1291 | elem.style.backgroundColor = 'white'; | |
1292 | elem.style.filter = 'alpha(opacity=0)'; | |
1293 | elem.style.width = this.width_ + "px"; | |
1294 | elem.style.height = this.height_ + "px"; | |
1295 | this.graphDiv.appendChild(elem); | |
1296 | return elem; | |
1297 | } else { | |
1298 | return this.canvas_; | |
1299 | } | |
1300 | }; | |
1301 | ||
1302 | /** | |
6a1aa64f DV |
1303 | * Generate a set of distinct colors for the data series. This is done with a |
1304 | * color wheel. Saturation/Value are customizable, and the hue is | |
1305 | * equally-spaced around the color wheel. If a custom set of colors is | |
1306 | * specified, that is used instead. | |
6a1aa64f DV |
1307 | * @private |
1308 | */ | |
285a6bda | 1309 | Dygraph.prototype.setColors_ = function() { |
ee53deb9 DV |
1310 | var labels = this.getLabels(); |
1311 | var num = labels.length - 1; | |
6a1aa64f | 1312 | this.colors_ = []; |
ee53deb9 | 1313 | this.colorsMap_ = {}; |
48423521 RK |
1314 | |
1315 | // These are used for when no custom colors are specified. | |
b0963cdb DV |
1316 | var sat = this.getNumericOption('colorSaturation') || 1.0; |
1317 | var val = this.getNumericOption('colorValue') || 0.5; | |
48423521 RK |
1318 | var half = Math.ceil(num / 2); |
1319 | ||
b0963cdb | 1320 | var colors = this.getOption('colors'); |
48423521 RK |
1321 | var visibility = this.visibility(); |
1322 | for (var i = 0; i < num; i++) { | |
1323 | if (!visibility[i]) { | |
1324 | continue; | |
1325 | } | |
1326 | var label = labels[i + 1]; | |
1327 | var colorStr = this.attributes_.getForSeries('color', label); | |
1328 | if (!colorStr) { | |
1329 | if (colors) { | |
1330 | colorStr = colors[i % colors.length]; | |
1331 | } else { | |
1332 | // alternate colors for high contrast. | |
1333 | var idx = i % 2 ? (half + (i + 1)/ 2) : Math.ceil((i + 1) / 2); | |
1334 | var hue = (1.0 * idx / (1 + num)); | |
1335 | colorStr = Dygraph.hsvToRGB(hue, sat, val); | |
1336 | } | |
1337 | } | |
1338 | this.colors_.push(colorStr); | |
1339 | this.colorsMap_[label] = colorStr; | |
1340 | } | |
629a09ae | 1341 | }; |
6a1aa64f | 1342 | |
43af96e7 NK |
1343 | /** |
1344 | * Return the list of colors. This is either the list of colors passed in the | |
629a09ae | 1345 | * attributes or the autogenerated list of rgb(r,g,b) strings. |
e2c21500 | 1346 | * This does not return colors for invisible series. |
8ef9d44d | 1347 | * @return {Array.<string>} The list of colors. |
43af96e7 NK |
1348 | */ |
1349 | Dygraph.prototype.getColors = function() { | |
1350 | return this.colors_; | |
1351 | }; | |
1352 | ||
6a1aa64f | 1353 | /** |
e2c21500 DV |
1354 | * Returns a few attributes of a series, i.e. its color, its visibility, which |
1355 | * axis it's assigned to, and its column in the original data. | |
1356 | * Returns null if the series does not exist. | |
1357 | * Otherwise, returns an object with column, visibility, color and axis properties. | |
1358 | * The "axis" property will be set to 1 for y1 and 2 for y2. | |
1359 | * The "column" property can be fed back into getValue(row, column) to get | |
1360 | * values for this series. | |
6a1aa64f | 1361 | */ |
e2c21500 DV |
1362 | Dygraph.prototype.getPropertiesForSeries = function(series_name) { |
1363 | var idx = -1; | |
1364 | var labels = this.getLabels(); | |
1365 | for (var i = 1; i < labels.length; i++) { | |
1366 | if (labels[i] == series_name) { | |
1367 | idx = i; | |
1368 | break; | |
b0c3b730 | 1369 | } |
6a1aa64f | 1370 | } |
e2c21500 | 1371 | if (idx == -1) return null; |
0abfbd7e | 1372 | |
e2c21500 DV |
1373 | return { |
1374 | name: series_name, | |
1375 | column: idx, | |
1376 | visible: this.visibility()[idx - 1], | |
189f8030 | 1377 | color: this.colorsMap_[series_name], |
16f00742 | 1378 | axis: 1 + this.attributes_.axisForSeries(series_name) |
e2c21500 | 1379 | }; |
0abfbd7e DV |
1380 | }; |
1381 | ||
1382 | /** | |
6a1aa64f | 1383 | * Create the text box to adjust the averaging period |
6a1aa64f DV |
1384 | * @private |
1385 | */ | |
285a6bda | 1386 | Dygraph.prototype.createRollInterface_ = function() { |
8c69de65 DV |
1387 | // Create a roller if one doesn't exist already. |
1388 | if (!this.roller_) { | |
1389 | this.roller_ = document.createElement("input"); | |
1390 | this.roller_.type = "text"; | |
1391 | this.roller_.style.display = "none"; | |
1392 | this.graphDiv.appendChild(this.roller_); | |
1393 | } | |
1394 | ||
b0963cdb | 1395 | var display = this.getBooleanOption('showRoller') ? 'block' : 'none'; |
26ca7938 | 1396 | |
0c38f187 | 1397 | var area = this.plotter_.area; |
b0c3b730 DV |
1398 | var textAttr = { "position": "absolute", |
1399 | "zIndex": 10, | |
0c38f187 DV |
1400 | "top": (area.y + area.h - 25) + "px", |
1401 | "left": (area.x + 1) + "px", | |
b0c3b730 | 1402 | "display": display |
6a1aa64f | 1403 | }; |
8c69de65 DV |
1404 | this.roller_.size = "2"; |
1405 | this.roller_.value = this.rollPeriod_; | |
b0c3b730 | 1406 | for (var name in textAttr) { |
85b99f0b | 1407 | if (textAttr.hasOwnProperty(name)) { |
8c69de65 | 1408 | this.roller_.style[name] = textAttr[name]; |
85b99f0b | 1409 | } |
b0c3b730 DV |
1410 | } |
1411 | ||
76171648 | 1412 | var dygraph = this; |
8c69de65 | 1413 | this.roller_.onchange = function() { dygraph.adjustRoll(dygraph.roller_.value); }; |
76171648 DV |
1414 | }; |
1415 | ||
629a09ae | 1416 | /** |
062ef401 JB |
1417 | * Set up all the mouse handlers needed to capture dragging behavior for zoom |
1418 | * events. | |
1419 | * @private | |
1420 | */ | |
1421 | Dygraph.prototype.createDragInterface_ = function() { | |
1422 | var context = { | |
1423 | // Tracks whether the mouse is down right now | |
1424 | isZooming: false, | |
1425 | isPanning: false, // is this drag part of a pan? | |
1426 | is2DPan: false, // if so, is that pan 1- or 2-dimensional? | |
8442269f RK |
1427 | dragStartX: null, // pixel coordinates |
1428 | dragStartY: null, // pixel coordinates | |
1429 | dragEndX: null, // pixel coordinates | |
1430 | dragEndY: null, // pixel coordinates | |
062ef401 | 1431 | dragDirection: null, |
8442269f RK |
1432 | prevEndX: null, // pixel coordinates |
1433 | prevEndY: null, // pixel coordinates | |
062ef401 | 1434 | prevDragDirection: null, |
421f1773 | 1435 | cancelNextDblclick: false, // see comment in dygraph-interaction-model.js |
062ef401 | 1436 | |
ec291cbe RK |
1437 | // The value on the left side of the graph when a pan operation starts. |
1438 | initialLeftmostDate: null, | |
1439 | ||
1440 | // The number of units each pixel spans. (This won't be valid for log | |
1441 | // scales) | |
1442 | xUnitsPerPixel: null, | |
062ef401 JB |
1443 | |
1444 | // TODO(danvk): update this comment | |
1445 | // The range in second/value units that the viewport encompasses during a | |
1446 | // panning operation. | |
1447 | dateRange: null, | |
1448 | ||
8442269f RK |
1449 | // Top-left corner of the canvas, in DOM coords |
1450 | // TODO(konigsberg): Rename topLeftCanvasX, topLeftCanvasY. | |
062ef401 JB |
1451 | px: 0, |
1452 | py: 0, | |
1453 | ||
965a030e | 1454 | // Values for use with panEdgeFraction, which limit how far outside the |
4cac8c7a RK |
1455 | // graph's data boundaries it can be panned. |
1456 | boundedDates: null, // [minDate, maxDate] | |
1457 | boundedValues: null, // [[minValue, maxValue] ...] | |
1458 | ||
2bad4d92 DV |
1459 | // We cover iframes during mouse interactions. See comments in |
1460 | // dygraph-utils.js for more info on why this is a good idea. | |
1461 | tarp: new Dygraph.IFrameTarp(), | |
1462 | ||
6a4587ac RK |
1463 | // contextB is the same thing as this context object but renamed. |
1464 | initializeMouseDown: function(event, g, contextB) { | |
062ef401 JB |
1465 | // prevents mouse drags from selecting page text. |
1466 | if (event.preventDefault) { | |
1467 | event.preventDefault(); // Firefox, Chrome, etc. | |
6a1aa64f | 1468 | } else { |
062ef401 JB |
1469 | event.returnValue = false; // IE |
1470 | event.cancelBubble = true; | |
6a1aa64f DV |
1471 | } |
1472 | ||
f381ac71 | 1473 | var canvasPos = Dygraph.findPos(g.canvas_); |
464b5f50 DV |
1474 | contextB.px = canvasPos.x; |
1475 | contextB.py = canvasPos.y; | |
806f92c1 DV |
1476 | contextB.dragStartX = Dygraph.dragGetX_(event, contextB); |
1477 | contextB.dragStartY = Dygraph.dragGetY_(event, contextB); | |
6a4587ac | 1478 | contextB.cancelNextDblclick = false; |
2bad4d92 | 1479 | contextB.tarp.cover(); |
6a1aa64f | 1480 | } |
062ef401 | 1481 | }; |
2b188b3d | 1482 | |
b0963cdb | 1483 | var interactionModel = this.getOption("interactionModel"); |
8b83c6cc | 1484 | |
062ef401 JB |
1485 | // Self is the graph. |
1486 | var self = this; | |
6faebb69 | 1487 | |
062ef401 JB |
1488 | // Function that binds the graph and context to the handler. |
1489 | var bindHandler = function(handler) { | |
1490 | return function(event) { | |
1491 | handler(event, self, context); | |
1492 | }; | |
1493 | }; | |
1494 | ||
1495 | for (var eventName in interactionModel) { | |
1496 | if (!interactionModel.hasOwnProperty(eventName)) continue; | |
aeca29ac | 1497 | this.addAndTrackEvent(this.mouseEventElement_, eventName, |
062ef401 JB |
1498 | bindHandler(interactionModel[eventName])); |
1499 | } | |
1500 | ||
1501 | // If the user releases the mouse button during a drag, but not over the | |
1502 | // canvas, then it doesn't count as a zooming action. | |
aeca29ac | 1503 | var mouseUpHandler = function(event) { |
062ef401 JB |
1504 | if (context.isZooming || context.isPanning) { |
1505 | context.isZooming = false; | |
1506 | context.dragStartX = null; | |
1507 | context.dragStartY = null; | |
1508 | } | |
1509 | ||
1510 | if (context.isPanning) { | |
1511 | context.isPanning = false; | |
1512 | context.draggingDate = null; | |
1513 | context.dateRange = null; | |
1514 | for (var i = 0; i < self.axes_.length; i++) { | |
1515 | delete self.axes_[i].draggingValue; | |
1516 | delete self.axes_[i].dragValueRange; | |
1517 | } | |
1518 | } | |
2bad4d92 DV |
1519 | |
1520 | context.tarp.uncover(); | |
cb1261cb DV |
1521 | }; |
1522 | ||
f914bed1 | 1523 | this.addAndTrackEvent(document, 'mouseup', mouseUpHandler); |
6a1aa64f DV |
1524 | }; |
1525 | ||
1526 | /** | |
1527 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
1528 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
1529 | * avoid extra redrawing, but it's tricky to avoid interactions with the status | |
1530 | * dots. | |
ccd9d7c2 | 1531 | * |
1bc88216 DV |
1532 | * @param {number} direction the direction of the zoom rectangle. Acceptable |
1533 | * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL. | |
1534 | * @param {number} startX The X position where the drag started, in canvas | |
1535 | * coordinates. | |
1536 | * @param {number} endX The current X position of the drag, in canvas coords. | |
1537 | * @param {number} startY The Y position where the drag started, in canvas | |
1538 | * coordinates. | |
1539 | * @param {number} endY The current Y position of the drag, in canvas coords. | |
1540 | * @param {number} prevDirection the value of direction on the previous call to | |
1541 | * this function. Used to avoid excess redrawing | |
1542 | * @param {number} prevEndX The value of endX on the previous call to this | |
1543 | * function. Used to avoid excess redrawing | |
1544 | * @param {number} prevEndY The value of endY on the previous call to this | |
1545 | * function. Used to avoid excess redrawing | |
6a1aa64f DV |
1546 | * @private |
1547 | */ | |
7201b11e JB |
1548 | Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY, |
1549 | endY, prevDirection, prevEndX, | |
1550 | prevEndY) { | |
2cf95fff | 1551 | var ctx = this.canvas_ctx_; |
6a1aa64f DV |
1552 | |
1553 | // Clean up from the previous rect if necessary | |
39b0e098 | 1554 | if (prevDirection == Dygraph.HORIZONTAL) { |
fa54c193 FXB |
1555 | ctx.clearRect(Math.min(startX, prevEndX), this.layout_.getPlotArea().y, |
1556 | Math.abs(startX - prevEndX), this.layout_.getPlotArea().h); | |
383d8473 | 1557 | } else if (prevDirection == Dygraph.VERTICAL) { |
fa54c193 FXB |
1558 | ctx.clearRect(this.layout_.getPlotArea().x, Math.min(startY, prevEndY), |
1559 | this.layout_.getPlotArea().w, Math.abs(startY - prevEndY)); | |
6a1aa64f DV |
1560 | } |
1561 | ||
1562 | // Draw a light-grey rectangle to show the new viewing area | |
39b0e098 | 1563 | if (direction == Dygraph.HORIZONTAL) { |
8b83c6cc RK |
1564 | if (endX && startX) { |
1565 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
fa54c193 FXB |
1566 | ctx.fillRect(Math.min(startX, endX), this.layout_.getPlotArea().y, |
1567 | Math.abs(endX - startX), this.layout_.getPlotArea().h); | |
8b83c6cc | 1568 | } |
920208fb | 1569 | } else if (direction == Dygraph.VERTICAL) { |
8b83c6cc RK |
1570 | if (endY && startY) { |
1571 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
fa54c193 FXB |
1572 | ctx.fillRect(this.layout_.getPlotArea().x, Math.min(startY, endY), |
1573 | this.layout_.getPlotArea().w, Math.abs(endY - startY)); | |
8b83c6cc | 1574 | } |
6a1aa64f | 1575 | } |
920208fb PF |
1576 | |
1577 | if (this.isUsingExcanvas_) { | |
1578 | this.currentZoomRectArgs_ = [direction, startX, endX, startY, endY, 0, 0, 0]; | |
1579 | } | |
1580 | }; | |
1581 | ||
1582 | /** | |
1583 | * Clear the zoom rectangle (and perform no zoom). | |
1584 | * @private | |
1585 | */ | |
1586 | Dygraph.prototype.clearZoomRect_ = function() { | |
1587 | this.currentZoomRectArgs_ = null; | |
1588 | this.canvas_ctx_.clearRect(0, 0, this.canvas_.width, this.canvas_.height); | |
6a1aa64f DV |
1589 | }; |
1590 | ||
1591 | /** | |
8b83c6cc RK |
1592 | * Zoom to something containing [lowX, highX]. These are pixel coordinates in |
1593 | * the canvas. The exact zoom window may be slightly larger if there are no data | |
1594 | * points near lowX or highX. Don't confuse this function with doZoomXDates, | |
1595 | * which accepts dates that match the raw data. This function redraws the graph. | |
d58ae307 | 1596 | * |
1bc88216 DV |
1597 | * @param {number} lowX The leftmost pixel value that should be visible. |
1598 | * @param {number} highX The rightmost pixel value that should be visible. | |
6a1aa64f DV |
1599 | * @private |
1600 | */ | |
8b83c6cc | 1601 | Dygraph.prototype.doZoomX_ = function(lowX, highX) { |
920208fb | 1602 | this.currentZoomRectArgs_ = null; |
6a1aa64f | 1603 | // Find the earliest and latest dates contained in this canvasx range. |
8b83c6cc | 1604 | // Convert the call to date ranges of the raw data. |
ff022deb RK |
1605 | var minDate = this.toDataXCoord(lowX); |
1606 | var maxDate = this.toDataXCoord(highX); | |
8b83c6cc RK |
1607 | this.doZoomXDates_(minDate, maxDate); |
1608 | }; | |
6a1aa64f | 1609 | |
8b83c6cc RK |
1610 | /** |
1611 | * Zoom to something containing [minDate, maxDate] values. Don't confuse this | |
1612 | * method with doZoomX which accepts pixel coordinates. This function redraws | |
1613 | * the graph. | |
d58ae307 | 1614 | * |
1bc88216 DV |
1615 | * @param {number} minDate The minimum date that should be visible. |
1616 | * @param {number} maxDate The maximum date that should be visible. | |
8b83c6cc RK |
1617 | * @private |
1618 | */ | |
1619 | Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) { | |
5b9b2142 RK |
1620 | // TODO(danvk): when xAxisRange is null (i.e. "fit to data", the animation |
1621 | // can produce strange effects. Rather than the x-axis transitioning slowly | |
b1a3b195 DV |
1622 | // between values, it can jerk around.) |
1623 | var old_window = this.xAxisRange(); | |
1624 | var new_window = [minDate, maxDate]; | |
57baab03 | 1625 | this.zoomed_x_ = true; |
b1a3b195 DV |
1626 | var that = this; |
1627 | this.doAnimatedZoom(old_window, new_window, null, null, function() { | |
b0963cdb DV |
1628 | if (that.getFunctionOption("zoomCallback")) { |
1629 | that.getFunctionOption("zoomCallback")( | |
1630 | minDate, maxDate, that.yAxisRanges()); | |
b1a3b195 DV |
1631 | } |
1632 | }); | |
8b83c6cc RK |
1633 | }; |
1634 | ||
1635 | /** | |
1636 | * Zoom to something containing [lowY, highY]. These are pixel coordinates in | |
d58ae307 DV |
1637 | * the canvas. This function redraws the graph. |
1638 | * | |
1bc88216 DV |
1639 | * @param {number} lowY The topmost pixel value that should be visible. |
1640 | * @param {number} highY The lowest pixel value that should be visible. | |
8b83c6cc RK |
1641 | * @private |
1642 | */ | |
1643 | Dygraph.prototype.doZoomY_ = function(lowY, highY) { | |
920208fb | 1644 | this.currentZoomRectArgs_ = null; |
d58ae307 DV |
1645 | // Find the highest and lowest values in pixel range for each axis. |
1646 | // Note that lowY (in pixels) corresponds to the max Value (in data coords). | |
1647 | // This is because pixels increase as you go down on the screen, whereas data | |
1648 | // coordinates increase as you go up the screen. | |
b1a3b195 DV |
1649 | var oldValueRanges = this.yAxisRanges(); |
1650 | var newValueRanges = []; | |
d58ae307 | 1651 | for (var i = 0; i < this.axes_.length; i++) { |
ff022deb RK |
1652 | var hi = this.toDataYCoord(lowY, i); |
1653 | var low = this.toDataYCoord(highY, i); | |
b1a3b195 | 1654 | newValueRanges.push([low, hi]); |
d58ae307 | 1655 | } |
8b83c6cc | 1656 | |
57baab03 | 1657 | this.zoomed_y_ = true; |
b1a3b195 DV |
1658 | var that = this; |
1659 | this.doAnimatedZoom(null, null, oldValueRanges, newValueRanges, function() { | |
b0963cdb | 1660 | if (that.getFunctionOption("zoomCallback")) { |
b1a3b195 | 1661 | var xRange = that.xAxisRange(); |
b0963cdb DV |
1662 | that.getFunctionOption("zoomCallback")( |
1663 | xRange[0], xRange[1], that.yAxisRanges()); | |
b1a3b195 DV |
1664 | } |
1665 | }); | |
8b83c6cc RK |
1666 | }; |
1667 | ||
1668 | /** | |
5b9b2142 RK |
1669 | * Transition function to use in animations. Returns values between 0.0 |
1670 | * (totally old values) and 1.0 (totally new values) for each frame. | |
1671 | * @private | |
1672 | */ | |
1673 | Dygraph.zoomAnimationFunction = function(frame, numFrames) { | |
1674 | var k = 1.5; | |
1675 | return (1.0 - Math.pow(k, -frame)) / (1.0 - Math.pow(k, -numFrames)); | |
1676 | }; | |
1677 | ||
1678 | /** | |
8b83c6cc RK |
1679 | * Reset the zoom to the original view coordinates. This is the same as |
1680 | * double-clicking on the graph. | |
8b83c6cc | 1681 | */ |
e4f6e11a | 1682 | Dygraph.prototype.resetZoom = function() { |
b1a3b195 | 1683 | var dirty = false, dirtyX = false, dirtyY = false; |
758a629f | 1684 | if (this.dateWindow_ !== null) { |
d58ae307 | 1685 | dirty = true; |
b1a3b195 | 1686 | dirtyX = true; |
8b83c6cc | 1687 | } |
d58ae307 DV |
1688 | |
1689 | for (var i = 0; i < this.axes_.length; i++) { | |
1f6a6254 | 1690 | if (typeof(this.axes_[i].valueWindow) !== 'undefined' && this.axes_[i].valueWindow !== null) { |
d58ae307 | 1691 | dirty = true; |
b1a3b195 | 1692 | dirtyY = true; |
d58ae307 | 1693 | } |
8b83c6cc RK |
1694 | } |
1695 | ||
da1369a5 DV |
1696 | // Clear any selection, since it's likely to be drawn in the wrong place. |
1697 | this.clearSelection(); | |
1698 | ||
8b83c6cc | 1699 | if (dirty) { |
57baab03 NN |
1700 | this.zoomed_x_ = false; |
1701 | this.zoomed_y_ = false; | |
b1a3b195 DV |
1702 | |
1703 | var minDate = this.rawData_[0][0]; | |
1704 | var maxDate = this.rawData_[this.rawData_.length - 1][0]; | |
1705 | ||
1706 | // With only one frame, don't bother calculating extreme ranges. | |
1707 | // TODO(danvk): merge this block w/ the code below. | |
b0963cdb | 1708 | if (!this.getBooleanOption("animatedZooms")) { |
b1a3b195 | 1709 | this.dateWindow_ = null; |
758a629f DV |
1710 | for (i = 0; i < this.axes_.length; i++) { |
1711 | if (this.axes_[i].valueWindow !== null) { | |
b1a3b195 DV |
1712 | delete this.axes_[i].valueWindow; |
1713 | } | |
1714 | } | |
1715 | this.drawGraph_(); | |
b0963cdb DV |
1716 | if (this.getFunctionOption("zoomCallback")) { |
1717 | this.getFunctionOption("zoomCallback")( | |
1718 | minDate, maxDate, this.yAxisRanges()); | |
b1a3b195 DV |
1719 | } |
1720 | return; | |
1721 | } | |
1722 | ||
1723 | var oldWindow=null, newWindow=null, oldValueRanges=null, newValueRanges=null; | |
1724 | if (dirtyX) { | |
1725 | oldWindow = this.xAxisRange(); | |
1726 | newWindow = [minDate, maxDate]; | |
1727 | } | |
1728 | ||
1729 | if (dirtyY) { | |
1730 | oldValueRanges = this.yAxisRanges(); | |
1731 | // TODO(danvk): this is pretty inefficient | |
1732 | var packed = this.gatherDatasets_(this.rolledSeries_, null); | |
30a5cfc6 | 1733 | var extremes = packed.extremes; |
b1a3b195 DV |
1734 | |
1735 | // this has the side-effect of modifying this.axes_. | |
1736 | // this doesn't make much sense in this context, but it's convenient (we | |
1737 | // need this.axes_[*].extremeValues) and not harmful since we'll be | |
1738 | // calling drawGraph_ shortly, which clobbers these values. | |
1739 | this.computeYAxisRanges_(extremes); | |
1740 | ||
1741 | newValueRanges = []; | |
758a629f | 1742 | for (i = 0; i < this.axes_.length; i++) { |
1f6a6254 | 1743 | var axis = this.axes_[i]; |
681a215e DV |
1744 | newValueRanges.push((axis.valueRange !== null && |
1745 | axis.valueRange !== undefined) ? | |
42a9ebb8 | 1746 | axis.valueRange : axis.extremeRange); |
b1a3b195 DV |
1747 | } |
1748 | } | |
1749 | ||
1750 | var that = this; | |
1751 | this.doAnimatedZoom(oldWindow, newWindow, oldValueRanges, newValueRanges, | |
1752 | function() { | |
1753 | that.dateWindow_ = null; | |
1754 | for (var i = 0; i < that.axes_.length; i++) { | |
758a629f | 1755 | if (that.axes_[i].valueWindow !== null) { |
b1a3b195 DV |
1756 | delete that.axes_[i].valueWindow; |
1757 | } | |
1758 | } | |
b0963cdb DV |
1759 | if (that.getFunctionOption("zoomCallback")) { |
1760 | that.getFunctionOption("zoomCallback")( | |
1761 | minDate, maxDate, that.yAxisRanges()); | |
b1a3b195 DV |
1762 | } |
1763 | }); | |
1764 | } | |
1765 | }; | |
1766 | ||
1767 | /** | |
1768 | * Combined animation logic for all zoom functions. | |
1769 | * either the x parameters or y parameters may be null. | |
1770 | * @private | |
1771 | */ | |
1772 | Dygraph.prototype.doAnimatedZoom = function(oldXRange, newXRange, oldYRanges, newYRanges, callback) { | |
b0963cdb DV |
1773 | var steps = this.getBooleanOption("animatedZooms") ? |
1774 | Dygraph.ANIMATION_STEPS : 1; | |
b1a3b195 DV |
1775 | |
1776 | var windows = []; | |
1777 | var valueRanges = []; | |
758a629f | 1778 | var step, frac; |
b1a3b195 | 1779 | |
758a629f DV |
1780 | if (oldXRange !== null && newXRange !== null) { |
1781 | for (step = 1; step <= steps; step++) { | |
1782 | frac = Dygraph.zoomAnimationFunction(step, steps); | |
b1a3b195 DV |
1783 | windows[step-1] = [oldXRange[0]*(1-frac) + frac*newXRange[0], |
1784 | oldXRange[1]*(1-frac) + frac*newXRange[1]]; | |
8b83c6cc | 1785 | } |
67e650dc | 1786 | } |
b1a3b195 | 1787 | |
758a629f DV |
1788 | if (oldYRanges !== null && newYRanges !== null) { |
1789 | for (step = 1; step <= steps; step++) { | |
1790 | frac = Dygraph.zoomAnimationFunction(step, steps); | |
b1a3b195 DV |
1791 | var thisRange = []; |
1792 | for (var j = 0; j < this.axes_.length; j++) { | |
1793 | thisRange.push([oldYRanges[j][0]*(1-frac) + frac*newYRanges[j][0], | |
1794 | oldYRanges[j][1]*(1-frac) + frac*newYRanges[j][1]]); | |
1795 | } | |
1796 | valueRanges[step-1] = thisRange; | |
1797 | } | |
1798 | } | |
1799 | ||
1800 | var that = this; | |
1801 | Dygraph.repeatAndCleanup(function(step) { | |
1802 | if (valueRanges.length) { | |
1803 | for (var i = 0; i < that.axes_.length; i++) { | |
1804 | var w = valueRanges[step][i]; | |
1805 | that.axes_[i].valueWindow = [w[0], w[1]]; | |
1806 | } | |
1807 | } | |
1808 | if (windows.length) { | |
1809 | that.dateWindow_ = windows[step]; | |
1810 | } | |
1811 | that.drawGraph_(); | |
1812 | }, steps, Dygraph.ANIMATION_DURATION / steps, callback); | |
6a1aa64f DV |
1813 | }; |
1814 | ||
1815 | /** | |
857a6931 KW |
1816 | * Get the current graph's area object. |
1817 | * | |
1818 | * Returns: {x, y, w, h} | |
6a1aa64f | 1819 | */ |
857a6931 KW |
1820 | Dygraph.prototype.getArea = function() { |
1821 | return this.plotter_.area; | |
1822 | }; | |
e863a17d | 1823 | |
857a6931 KW |
1824 | /** |
1825 | * Convert a mouse event to DOM coordinates relative to the graph origin. | |
1826 | * | |
1827 | * Returns a two-element array: [X, Y]. | |
1828 | */ | |
1829 | Dygraph.prototype.eventToDomCoords = function(event) { | |
abc8c570 RK |
1830 | if (event.offsetX && event.offsetY) { |
1831 | return [ event.offsetX, event.offsetY ]; | |
1832 | } else { | |
4d9f1cb9 | 1833 | var eventElementPos = Dygraph.findPos(this.mouseEventElement_); |
464b5f50 DV |
1834 | var canvasx = Dygraph.pageX(event) - eventElementPos.x; |
1835 | var canvasy = Dygraph.pageY(event) - eventElementPos.y; | |
abc8c570 RK |
1836 | return [canvasx, canvasy]; |
1837 | } | |
857a6931 | 1838 | }; |
4cac8c7a | 1839 | |
857a6931 KW |
1840 | /** |
1841 | * Given a canvas X coordinate, find the closest row. | |
1bc88216 DV |
1842 | * @param {number} domX graph-relative DOM X coordinate |
1843 | * Returns {number} row number. | |
857a6931 KW |
1844 | * @private |
1845 | */ | |
1846 | Dygraph.prototype.findClosestRow = function(domX) { | |
81cb07d6 | 1847 | var minDistX = Infinity; |
a703cbdf | 1848 | var closestRow = -1; |
a12a78ae DV |
1849 | var sets = this.layout_.points; |
1850 | for (var i = 0; i < sets.length; i++) { | |
1851 | var points = sets[i]; | |
1852 | var len = points.length; | |
1853 | for (var j = 0; j < len; j++) { | |
1854 | var point = points[j]; | |
1855 | if (!Dygraph.isValidPoint(point, true)) continue; | |
1856 | var dist = Math.abs(point.canvasx - domX); | |
1857 | if (dist < minDistX) { | |
1858 | minDistX = dist; | |
a703cbdf | 1859 | closestRow = point.idx; |
a12a78ae | 1860 | } |
a937d031 | 1861 | } |
6a1aa64f | 1862 | } |
a12a78ae | 1863 | |
a703cbdf | 1864 | return closestRow; |
857a6931 | 1865 | }; |
6a1aa64f | 1866 | |
857a6931 | 1867 | /** |
2a02e5dd KW |
1868 | * Given canvas X,Y coordinates, find the closest point. |
1869 | * | |
1870 | * This finds the individual data point across all visible series | |
1871 | * that's closest to the supplied DOM coordinates using the standard | |
1872 | * Euclidean X,Y distance. | |
1873 | * | |
1bc88216 DV |
1874 | * @param {number} domX graph-relative DOM X coordinate |
1875 | * @param {number} domY graph-relative DOM Y coordinate | |
857a6931 KW |
1876 | * Returns: {row, seriesName, point} |
1877 | * @private | |
1878 | */ | |
1879 | Dygraph.prototype.findClosestPoint = function(domX, domY) { | |
81cb07d6 | 1880 | var minDist = Infinity; |
55231c07 | 1881 | var dist, dx, dy, point, closestPoint, closestSeries, closestRow; |
30a5cfc6 | 1882 | for ( var setIdx = this.layout_.points.length - 1 ; setIdx >= 0 ; --setIdx ) { |
a12a78ae DV |
1883 | var points = this.layout_.points[setIdx]; |
1884 | for (var i = 0; i < points.length; ++i) { | |
55231c07 | 1885 | point = points[i]; |
62c3d2fd | 1886 | if (!Dygraph.isValidPoint(point)) continue; |
857a6931 KW |
1887 | dx = point.canvasx - domX; |
1888 | dy = point.canvasy - domY; | |
1889 | dist = dx * dx + dy * dy; | |
81cb07d6 | 1890 | if (dist < minDist) { |
62c3d2fd | 1891 | minDist = dist; |
a937d031 KW |
1892 | closestPoint = point; |
1893 | closestSeries = setIdx; | |
55231c07 | 1894 | closestRow = point.idx; |
a937d031 | 1895 | } |
857a6931 KW |
1896 | } |
1897 | } | |
1898 | var name = this.layout_.setNames[closestSeries]; | |
1899 | return { | |
55231c07 | 1900 | row: closestRow, |
857a6931 KW |
1901 | seriesName: name, |
1902 | point: closestPoint | |
1903 | }; | |
1904 | }; | |
1905 | ||
1906 | /** | |
1907 | * Given canvas X,Y coordinates, find the touched area in a stacked graph. | |
2a02e5dd KW |
1908 | * |
1909 | * This first finds the X data point closest to the supplied DOM X coordinate, | |
1910 | * then finds the series which puts the Y coordinate on top of its filled area, | |
1911 | * using linear interpolation between adjacent point pairs. | |
1912 | * | |
1bc88216 DV |
1913 | * @param {number} domX graph-relative DOM X coordinate |
1914 | * @param {number} domY graph-relative DOM Y coordinate | |
857a6931 KW |
1915 | * Returns: {row, seriesName, point} |
1916 | * @private | |
1917 | */ | |
1918 | Dygraph.prototype.findStackedPoint = function(domX, domY) { | |
1919 | var row = this.findClosestRow(domX); | |
857a6931 | 1920 | var closestPoint, closestSeries; |
30a5cfc6 | 1921 | for (var setIdx = 0; setIdx < this.layout_.points.length; ++setIdx) { |
55231c07 DE |
1922 | var boundary = this.getLeftBoundary_(setIdx); |
1923 | var rowIdx = row - boundary; | |
a12a78ae DV |
1924 | var points = this.layout_.points[setIdx]; |
1925 | if (rowIdx >= points.length) continue; | |
1926 | var p1 = points[rowIdx]; | |
62c3d2fd | 1927 | if (!Dygraph.isValidPoint(p1)) continue; |
857a6931 | 1928 | var py = p1.canvasy; |
a12a78ae | 1929 | if (domX > p1.canvasx && rowIdx + 1 < points.length) { |
857a6931 | 1930 | // interpolate series Y value using next point |
a12a78ae | 1931 | var p2 = points[rowIdx + 1]; |
62c3d2fd KW |
1932 | if (Dygraph.isValidPoint(p2)) { |
1933 | var dx = p2.canvasx - p1.canvasx; | |
1934 | if (dx > 0) { | |
1935 | var r = (domX - p1.canvasx) / dx; | |
1936 | py += r * (p2.canvasy - p1.canvasy); | |
1937 | } | |
416b05ad | 1938 | } |
81cb07d6 | 1939 | } else if (domX < p1.canvasx && rowIdx > 0) { |
857a6931 | 1940 | // interpolate series Y value using previous point |
a12a78ae | 1941 | var p0 = points[rowIdx - 1]; |
62c3d2fd KW |
1942 | if (Dygraph.isValidPoint(p0)) { |
1943 | var dx = p1.canvasx - p0.canvasx; | |
1944 | if (dx > 0) { | |
1945 | var r = (p1.canvasx - domX) / dx; | |
1946 | py += r * (p0.canvasy - p1.canvasy); | |
1947 | } | |
12e4c741 | 1948 | } |
6a1aa64f | 1949 | } |
857a6931 | 1950 | // Stop if the point (domX, py) is above this series' upper edge |
42a9ebb8 | 1951 | if (setIdx === 0 || py < domY) { |
a937d031 KW |
1952 | closestPoint = p1; |
1953 | closestSeries = setIdx; | |
1954 | } | |
6a1aa64f | 1955 | } |
857a6931 KW |
1956 | var name = this.layout_.setNames[closestSeries]; |
1957 | return { | |
1958 | row: row, | |
1959 | seriesName: name, | |
1960 | point: closestPoint | |
1961 | }; | |
1962 | }; | |
6a1aa64f | 1963 | |
857a6931 | 1964 | /** |
6a1aa64f DV |
1965 | * When the mouse moves in the canvas, display information about a nearby data |
1966 | * point and draw dots over those points in the data series. This function | |
1967 | * takes care of cleanup of previously-drawn dots. | |
1968 | * @param {Object} event The mousemove event from the browser. | |
1969 | * @private | |
1970 | */ | |
285a6bda | 1971 | Dygraph.prototype.mouseMove_ = function(event) { |
e863a17d | 1972 | // This prevents JS errors when mousing over the canvas before data loads. |
4cac8c7a | 1973 | var points = this.layout_.points; |
a12a78ae | 1974 | if (points === undefined || points === null) return; |
e863a17d | 1975 | |
857a6931 KW |
1976 | var canvasCoords = this.eventToDomCoords(event); |
1977 | var canvasx = canvasCoords[0]; | |
1978 | var canvasy = canvasCoords[1]; | |
6a1aa64f | 1979 | |
b0963cdb | 1980 | var highlightSeriesOpts = this.getOption("highlightSeriesOpts"); |
857a6931 | 1981 | var selectionChanged = false; |
3f55b813 | 1982 | if (highlightSeriesOpts && !this.isSeriesLocked()) { |
857a6931 | 1983 | var closest; |
b0963cdb | 1984 | if (this.getBooleanOption("stackedGraph")) { |
857a6931 KW |
1985 | closest = this.findStackedPoint(canvasx, canvasy); |
1986 | } else { | |
1987 | closest = this.findClosestPoint(canvasx, canvasy); | |
43af96e7 | 1988 | } |
857a6931 | 1989 | selectionChanged = this.setSelection(closest.row, closest.seriesName); |
416b05ad | 1990 | } else { |
857a6931 KW |
1991 | var idx = this.findClosestRow(canvasx); |
1992 | selectionChanged = this.setSelection(idx); | |
12e4c741 | 1993 | } |
43af96e7 | 1994 | |
b0963cdb | 1995 | var callback = this.getFunctionOption("highlightCallback"); |
857a6931 | 1996 | if (callback && selectionChanged) { |
870a309c DV |
1997 | callback(event, |
1998 | this.lastx_, | |
1999 | this.selPoints_, | |
55231c07 | 2000 | this.lastRow_, |
870a309c | 2001 | this.highlightSet_); |
12e4c741 | 2002 | } |
239c712d | 2003 | }; |
b258a3da | 2004 | |
239c712d | 2005 | /** |
55231c07 DE |
2006 | * Fetch left offset from the specified set index or if not passed, the |
2007 | * first defined boundaryIds record (see bug #236). | |
e2c21500 | 2008 | * @private |
81cb07d6 | 2009 | */ |
55231c07 | 2010 | Dygraph.prototype.getLeftBoundary_ = function(setIdx) { |
383d8473 | 2011 | if (this.boundaryIds_[setIdx]) { |
a703cbdf | 2012 | return this.boundaryIds_[setIdx][0]; |
55231c07 DE |
2013 | } else { |
2014 | for (var i = 0; i < this.boundaryIds_.length; i++) { | |
2015 | if (this.boundaryIds_[i] !== undefined) { | |
2016 | return this.boundaryIds_[i][0]; | |
2017 | } | |
81cb07d6 | 2018 | } |
55231c07 | 2019 | return 0; |
81cb07d6 | 2020 | } |
81cb07d6 KW |
2021 | }; |
2022 | ||
857a6931 KW |
2023 | Dygraph.prototype.animateSelection_ = function(direction) { |
2024 | var totalSteps = 10; | |
2025 | var millis = 30; | |
1d44ee5e KW |
2026 | if (this.fadeLevel === undefined) this.fadeLevel = 0; |
2027 | if (this.animateId === undefined) this.animateId = 0; | |
857a6931 KW |
2028 | var start = this.fadeLevel; |
2029 | var steps = direction < 0 ? start : totalSteps - start; | |
2030 | if (steps <= 0) { | |
2031 | if (this.fadeLevel) { | |
2032 | this.updateSelection_(1.0); | |
2033 | } | |
2034 | return; | |
2035 | } | |
2036 | ||
2037 | var thisId = ++this.animateId; | |
2038 | var that = this; | |
475f7420 KW |
2039 | Dygraph.repeatAndCleanup( |
2040 | function(n) { | |
2041 | // ignore simultaneous animations | |
2042 | if (that.animateId != thisId) return; | |
2043 | ||
2044 | that.fadeLevel += direction; | |
2045 | if (that.fadeLevel === 0) { | |
2046 | that.clearSelection(); | |
2047 | } else { | |
2048 | that.updateSelection_(that.fadeLevel / totalSteps); | |
2049 | } | |
2050 | }, | |
2051 | steps, millis, function() {}); | |
857a6931 KW |
2052 | }; |
2053 | ||
2ddb1197 | 2054 | /** |
239c712d NAG |
2055 | * Draw dots over the selectied points in the data series. This function |
2056 | * takes care of cleanup of previously-drawn dots. | |
2057 | * @private | |
2058 | */ | |
857a6931 | 2059 | Dygraph.prototype.updateSelection_ = function(opt_animFraction) { |
0cd1ad15 DV |
2060 | /*var defaultPrevented = */ |
2061 | this.cascadeEvents_('select', { | |
e2c21500 DV |
2062 | selectedX: this.lastx_, |
2063 | selectedPoints: this.selPoints_ | |
2064 | }); | |
2065 | // TODO(danvk): use defaultPrevented here? | |
2066 | ||
6a1aa64f | 2067 | // Clear the previously drawn vertical, if there is one |
758a629f | 2068 | var i; |
2cf95fff | 2069 | var ctx = this.canvas_ctx_; |
b0963cdb | 2070 | if (this.getOption('highlightSeriesOpts')) { |
857a6931 | 2071 | ctx.clearRect(0, 0, this.width_, this.height_); |
b0963cdb | 2072 | var alpha = 1.0 - this.getNumericOption('highlightSeriesBackgroundAlpha'); |
857a6931 | 2073 | if (alpha) { |
2a02e5dd KW |
2074 | // Activating background fade includes an animation effect for a gradual |
2075 | // fade. TODO(klausw): make this independently configurable if it causes | |
2076 | // issues? Use a shared preference to control animations? | |
2077 | var animateBackgroundFade = true; | |
2078 | if (animateBackgroundFade) { | |
857a6931 KW |
2079 | if (opt_animFraction === undefined) { |
2080 | // start a new animation | |
2081 | this.animateSelection_(1); | |
2082 | return; | |
2083 | } | |
2084 | alpha *= opt_animFraction; | |
2085 | } | |
2086 | ctx.fillStyle = 'rgba(255,255,255,' + alpha + ')'; | |
2087 | ctx.fillRect(0, 0, this.width_, this.height_); | |
2088 | } | |
38e3d209 DV |
2089 | |
2090 | // Redraw only the highlighted series in the interactive canvas (not the | |
2091 | // static plot canvas, which is where series are usually drawn). | |
2092 | this.plotter_._renderLineChart(this.highlightSet_, ctx); | |
857a6931 | 2093 | } else if (this.previousVerticalX_ >= 0) { |
46dde5f9 DV |
2094 | // Determine the maximum highlight circle size. |
2095 | var maxCircleSize = 0; | |
227b93cc | 2096 | var labels = this.attr_('labels'); |
758a629f | 2097 | for (i = 1; i < labels.length; i++) { |
b0963cdb | 2098 | var r = this.getNumericOption('highlightCircleSize', labels[i]); |
46dde5f9 DV |
2099 | if (r > maxCircleSize) maxCircleSize = r; |
2100 | } | |
6a1aa64f | 2101 | var px = this.previousVerticalX_; |
46dde5f9 DV |
2102 | ctx.clearRect(px - maxCircleSize - 1, 0, |
2103 | 2 * maxCircleSize + 2, this.height_); | |
6a1aa64f DV |
2104 | } |
2105 | ||
920208fb PF |
2106 | if (this.isUsingExcanvas_ && this.currentZoomRectArgs_) { |
2107 | Dygraph.prototype.drawZoomRect_.apply(this, this.currentZoomRectArgs_); | |
2108 | } | |
2109 | ||
d160cc3b | 2110 | if (this.selPoints_.length > 0) { |
6a1aa64f | 2111 | // Draw colored circles over the center of each selected point |
e9fe4a2f | 2112 | var canvasx = this.selPoints_[0].canvasx; |
43af96e7 | 2113 | ctx.save(); |
758a629f | 2114 | for (i = 0; i < this.selPoints_.length; i++) { |
e9fe4a2f DV |
2115 | var pt = this.selPoints_[i]; |
2116 | if (!Dygraph.isOK(pt.canvasy)) continue; | |
2117 | ||
b0963cdb DV |
2118 | var circleSize = this.getNumericOption('highlightCircleSize', pt.name); |
2119 | var callback = this.getFunctionOption("drawHighlightPointCallback", pt.name); | |
a8ef67a8 | 2120 | var color = this.plotter_.colors[pt.name]; |
78e58af4 RK |
2121 | if (!callback) { |
2122 | callback = Dygraph.Circles.DEFAULT; | |
2123 | } | |
b0963cdb | 2124 | ctx.lineWidth = this.getNumericOption('strokeWidth', pt.name); |
a8ef67a8 KW |
2125 | ctx.strokeStyle = color; |
2126 | ctx.fillStyle = color; | |
df75aef5 | 2127 | callback(this, pt.name, ctx, canvasx, pt.canvasy, |
ba697462 | 2128 | color, circleSize, pt.idx); |
6a1aa64f DV |
2129 | } |
2130 | ctx.restore(); | |
2131 | ||
2132 | this.previousVerticalX_ = canvasx; | |
2133 | } | |
2134 | }; | |
2135 | ||
2136 | /** | |
629a09ae DV |
2137 | * Manually set the selected points and display information about them in the |
2138 | * legend. The selection can be cleared using clearSelection() and queried | |
2139 | * using getSelection(). | |
1bc88216 | 2140 | * @param {number} row Row number that should be highlighted (i.e. appear with |
629a09ae | 2141 | * hover dots on the chart). Set to false to clear any selection. |
1bc88216 | 2142 | * @param {seriesName} optional series name to highlight that series with the |
857a6931 | 2143 | * the highlightSeriesOpts setting. |
b9a3ece4 KW |
2144 | * @param { locked } optional If true, keep seriesName selected when mousing |
2145 | * over the graph, disabling closest-series highlighting. Call clearSelection() | |
2146 | * to unlock it. | |
239c712d | 2147 | */ |
b9a3ece4 | 2148 | Dygraph.prototype.setSelection = function(row, opt_seriesName, opt_locked) { |
239c712d NAG |
2149 | // Extract the points we've selected |
2150 | this.selPoints_ = []; | |
50360fd0 | 2151 | |
857a6931 | 2152 | var changed = false; |
16269f6e | 2153 | if (row !== false && row >= 0) { |
857a6931 KW |
2154 | if (row != this.lastRow_) changed = true; |
2155 | this.lastRow_ = row; | |
30a5cfc6 KW |
2156 | for (var setIdx = 0; setIdx < this.layout_.points.length; ++setIdx) { |
2157 | var points = this.layout_.points[setIdx]; | |
8b7f7651 AV |
2158 | // Check if the point at the appropriate index is the point we're looking |
2159 | // for. If it is, just use it, otherwise search the array for a point | |
2160 | // in the proper place. | |
2161 | var setRow = row - this.getLeftBoundary_(setIdx); | |
2162 | if (setRow < points.length && points[setRow].idx == row) { | |
2163 | var point = points[setRow]; | |
2164 | if (point.yval !== null) this.selPoints_.push(point); | |
2165 | } else { | |
2166 | for (var pointIdx = 0; pointIdx < points.length; ++pointIdx) { | |
2167 | var point = points[pointIdx]; | |
2168 | if (point.idx == row) { | |
2169 | if (point.yval !== null) { | |
2170 | this.selPoints_.push(point); | |
2171 | } | |
2172 | break; | |
ad7785b8 | 2173 | } |
ad7785b8 | 2174 | } |
16269f6e | 2175 | } |
239c712d | 2176 | } |
857a6931 KW |
2177 | } else { |
2178 | if (this.lastRow_ >= 0) changed = true; | |
2179 | this.lastRow_ = -1; | |
16269f6e | 2180 | } |
50360fd0 | 2181 | |
16269f6e | 2182 | if (this.selPoints_.length) { |
239c712d | 2183 | this.lastx_ = this.selPoints_[0].xval; |
239c712d | 2184 | } else { |
857a6931 | 2185 | this.lastx_ = -1; |
239c712d NAG |
2186 | } |
2187 | ||
857a6931 KW |
2188 | if (opt_seriesName !== undefined) { |
2189 | if (this.highlightSet_ !== opt_seriesName) changed = true; | |
2190 | this.highlightSet_ = opt_seriesName; | |
239c712d NAG |
2191 | } |
2192 | ||
b9a3ece4 KW |
2193 | if (opt_locked !== undefined) { |
2194 | this.lockedSet_ = opt_locked; | |
2195 | } | |
2196 | ||
857a6931 KW |
2197 | if (changed) { |
2198 | this.updateSelection_(undefined); | |
2199 | } | |
2200 | return changed; | |
239c712d NAG |
2201 | }; |
2202 | ||
2203 | /** | |
6a1aa64f DV |
2204 | * The mouse has left the canvas. Clear out whatever artifacts remain |
2205 | * @param {Object} event the mouseout event from the browser. | |
2206 | * @private | |
2207 | */ | |
285a6bda | 2208 | Dygraph.prototype.mouseOut_ = function(event) { |
b0963cdb DV |
2209 | if (this.getFunctionOption("unhighlightCallback")) { |
2210 | this.getFunctionOption("unhighlightCallback")(event); | |
a4c6a67c AV |
2211 | } |
2212 | ||
b0963cdb | 2213 | if (this.getFunctionOption("hideOverlayOnMouseOut") && !this.lockedSet_) { |
239c712d | 2214 | this.clearSelection(); |
43af96e7 | 2215 | } |
6a1aa64f DV |
2216 | }; |
2217 | ||
239c712d | 2218 | /** |
629a09ae DV |
2219 | * Clears the current selection (i.e. points that were highlighted by moving |
2220 | * the mouse over the chart). | |
239c712d NAG |
2221 | */ |
2222 | Dygraph.prototype.clearSelection = function() { | |
e2c21500 DV |
2223 | this.cascadeEvents_('deselect', {}); |
2224 | ||
b9a3ece4 | 2225 | this.lockedSet_ = false; |
239c712d | 2226 | // Get rid of the overlay data |
857a6931 KW |
2227 | if (this.fadeLevel) { |
2228 | this.animateSelection_(-1); | |
2229 | return; | |
2230 | } | |
2cf95fff | 2231 | this.canvas_ctx_.clearRect(0, 0, this.width_, this.height_); |
857a6931 | 2232 | this.fadeLevel = 0; |
239c712d NAG |
2233 | this.selPoints_ = []; |
2234 | this.lastx_ = -1; | |
857a6931 KW |
2235 | this.lastRow_ = -1; |
2236 | this.highlightSet_ = null; | |
758a629f | 2237 | }; |
239c712d | 2238 | |
103b7292 | 2239 | /** |
629a09ae DV |
2240 | * Returns the number of the currently selected row. To get data for this row, |
2241 | * you can use the getValue method. | |
1bc88216 | 2242 | * @return {number} row number, or -1 if nothing is selected |
103b7292 NAG |
2243 | */ |
2244 | Dygraph.prototype.getSelection = function() { | |
2245 | if (!this.selPoints_ || this.selPoints_.length < 1) { | |
2246 | return -1; | |
2247 | } | |
50360fd0 | 2248 | |
a12a78ae DV |
2249 | for (var setIdx = 0; setIdx < this.layout_.points.length; setIdx++) { |
2250 | var points = this.layout_.points[setIdx]; | |
2251 | for (var row = 0; row < points.length; row++) { | |
2252 | if (points[row].x == this.selPoints_[0].x) { | |
55231c07 | 2253 | return points[row].idx; |
a12a78ae | 2254 | } |
103b7292 NAG |
2255 | } |
2256 | } | |
2257 | return -1; | |
2e1fcf1a | 2258 | }; |
103b7292 | 2259 | |
e2c21500 DV |
2260 | /** |
2261 | * Returns the name of the currently-highlighted series. | |
2262 | * Only available when the highlightSeriesOpts option is in use. | |
2263 | */ | |
857a6931 KW |
2264 | Dygraph.prototype.getHighlightSeries = function() { |
2265 | return this.highlightSet_; | |
2266 | }; | |
2267 | ||
19589a3e | 2268 | /** |
3f55b813 KW |
2269 | * Returns true if the currently-highlighted series was locked |
2270 | * via setSelection(..., seriesName, true). | |
2271 | */ | |
2272 | Dygraph.prototype.isSeriesLocked = function() { | |
2273 | return this.lockedSet_; | |
2274 | }; | |
2275 | ||
2276 | /** | |
6a1aa64f | 2277 | * Fires when there's data available to be graphed. |
1bc88216 | 2278 | * @param {string} data Raw CSV data to be plotted |
6a1aa64f DV |
2279 | * @private |
2280 | */ | |
285a6bda | 2281 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f | 2282 | this.rawData_ = this.parseCSV_(data); |
26ca7938 | 2283 | this.predraw_(); |
6a1aa64f DV |
2284 | }; |
2285 | ||
6a1aa64f DV |
2286 | /** |
2287 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
2288 | * @private | |
2289 | */ | |
285a6bda | 2290 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f | 2291 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
7201b11e | 2292 | var range; |
6a1aa64f | 2293 | if (this.dateWindow_) { |
7201b11e | 2294 | range = [this.dateWindow_[0], this.dateWindow_[1]]; |
6a1aa64f | 2295 | } else { |
ccecde93 | 2296 | range = this.xAxisExtremes(); |
7201b11e JB |
2297 | } |
2298 | ||
48e614ac DV |
2299 | var xAxisOptionsView = this.optionsViewForAxis_('x'); |
2300 | var xTicks = xAxisOptionsView('ticker')( | |
2301 | range[0], | |
2302 | range[1], | |
2303 | this.width_, // TODO(danvk): should be area.width | |
2304 | xAxisOptionsView, | |
2305 | this); | |
2306 | // var msg = 'ticker(' + range[0] + ', ' + range[1] + ', ' + this.width_ + ', ' + this.attr_('pixelsPerXLabel') + ') -> ' + JSON.stringify(xTicks); | |
2307 | // console.log(msg); | |
b2c9222a | 2308 | this.layout_.setXTicks(xTicks); |
32988383 DV |
2309 | }; |
2310 | ||
629a09ae | 2311 | /** |
3ea41d86 | 2312 | * Returns the correct handler class for the currently set options. |
629a09ae | 2313 | * @private |
3ea41d86 DV |
2314 | */ |
2315 | Dygraph.prototype.getHandlerClass_ = function() { | |
2316 | var handlerClass; | |
2317 | if (this.attr_('dataHandler')) { | |
2318 | handlerClass = this.attr_('dataHandler'); | |
2319 | } else if (this.fractions_) { | |
b0963cdb | 2320 | if (this.getBooleanOption('errorBars')) { |
3ea41d86 | 2321 | handlerClass = Dygraph.DataHandlers.FractionsBarsHandler; |
a49c164a | 2322 | } else { |
3ea41d86 | 2323 | handlerClass = Dygraph.DataHandlers.DefaultFractionHandler; |
5011e7a1 | 2324 | } |
b0963cdb | 2325 | } else if (this.getBooleanOption('customBars')) { |
3ea41d86 | 2326 | handlerClass = Dygraph.DataHandlers.CustomBarsHandler; |
b0963cdb | 2327 | } else if (this.getBooleanOption('errorBars')) { |
3ea41d86 | 2328 | handlerClass = Dygraph.DataHandlers.ErrorBarsHandler; |
5011e7a1 | 2329 | } else { |
3ea41d86 | 2330 | handlerClass = Dygraph.DataHandlers.DefaultHandler; |
5011e7a1 | 2331 | } |
3ea41d86 | 2332 | return handlerClass; |
5011e7a1 DV |
2333 | }; |
2334 | ||
6a1aa64f | 2335 | /** |
629a09ae | 2336 | * @private |
26ca7938 DV |
2337 | * This function is called once when the chart's data is changed or the options |
2338 | * dictionary is updated. It is _not_ called when the user pans or zooms. The | |
2339 | * idea is that values derived from the chart's data can be computed here, | |
2340 | * rather than every time the chart is drawn. This includes things like the | |
2341 | * number of axes, rolling averages, etc. | |
2342 | */ | |
2343 | Dygraph.prototype.predraw_ = function() { | |
7153e001 | 2344 | var start = new Date(); |
a49c164a DE |
2345 | |
2346 | // Create the correct dataHandler | |
3ea41d86 | 2347 | this.dataHandler_ = new (this.getHandlerClass_())(); |
7153e001 | 2348 | |
0d216a60 PF |
2349 | this.layout_.computePlotArea(); |
2350 | ||
26ca7938 DV |
2351 | // TODO(danvk): move more computations out of drawGraph_ and into here. |
2352 | this.computeYAxes_(); | |
2353 | ||
2354 | // Create a new plotter. | |
f417e3d3 | 2355 | if (this.plotter_) { |
1748a51c | 2356 | this.cascadeEvents_('clearChart'); |
f417e3d3 DV |
2357 | this.plotter_.clear(); |
2358 | } | |
aeca29ac | 2359 | |
383d8473 | 2360 | if (!this.is_initial_draw_) { |
aeca29ac RK |
2361 | this.canvas_ctx_.restore(); |
2362 | this.hidden_ctx_.restore(); | |
2363 | } | |
2364 | ||
2365 | this.canvas_ctx_.save(); | |
2366 | this.hidden_ctx_.save(); | |
2367 | ||
26ca7938 | 2368 | this.plotter_ = new DygraphCanvasRenderer(this, |
2cf95fff RK |
2369 | this.hidden_, |
2370 | this.hidden_ctx_, | |
0e23cfc6 | 2371 | this.layout_); |
26ca7938 | 2372 | |
0abfbd7e DV |
2373 | // The roller sits in the bottom left corner of the chart. We don't know where |
2374 | // this will be until the options are available, so it's positioned here. | |
8c69de65 | 2375 | this.createRollInterface_(); |
26ca7938 | 2376 | |
e2c21500 | 2377 | this.cascadeEvents_('predraw'); |
0abfbd7e | 2378 | |
b1a3b195 DV |
2379 | // Convert the raw data (a 2D array) into the internal format and compute |
2380 | // rolling averages. | |
2381 | this.rolledSeries_ = [null]; // x-axis is the first series and it's special | |
395e98a3 | 2382 | for (var i = 1; i < this.numColumns(); i++) { |
c1780ad0 | 2383 | // var logScale = this.attr_('logscale', i); // TODO(klausw): this looks wrong // konigsberg thinks so too. |
a49c164a DE |
2384 | var series = this.dataHandler_.extractSeries(this.rawData_, i, this.attributes_); |
2385 | if (this.rollPeriod_ > 1) { | |
2386 | series = this.dataHandler_.rollingAverage(series, this.rollPeriod_, this.attributes_); | |
2387 | } | |
2388 | ||
b1a3b195 DV |
2389 | this.rolledSeries_.push(series); |
2390 | } | |
2391 | ||
26ca7938 DV |
2392 | // If the data or options have changed, then we'd better redraw. |
2393 | this.drawGraph_(); | |
4b4d1a63 DV |
2394 | |
2395 | // This is used to determine whether to do various animations. | |
2396 | var end = new Date(); | |
2397 | this.drawingTimeMs_ = (end - start); | |
26ca7938 DV |
2398 | }; |
2399 | ||
2400 | /** | |
30a5cfc6 KW |
2401 | * Point structure. |
2402 | * | |
2403 | * xval_* and yval_* are the original unscaled data values, | |
2404 | * while x_* and y_* are scaled to the range (0.0-1.0) for plotting. | |
2405 | * yval_stacked is the cumulative Y value used for stacking graphs, | |
2406 | * and bottom/top/minus/plus are used for error bar graphs. | |
2407 | * | |
2408 | * @typedef {{ | |
2409 | * idx: number, | |
2410 | * name: string, | |
2411 | * x: ?number, | |
2412 | * xval: ?number, | |
2413 | * y_bottom: ?number, | |
2414 | * y: ?number, | |
2415 | * y_stacked: ?number, | |
2416 | * y_top: ?number, | |
2417 | * yval_minus: ?number, | |
2418 | * yval: ?number, | |
2419 | * yval_plus: ?number, | |
2420 | * yval_stacked | |
2421 | * }} | |
2422 | */ | |
bcc53a77 | 2423 | Dygraph.PointType = undefined; |
30a5cfc6 | 2424 | |
30a5cfc6 KW |
2425 | /** |
2426 | * Calculates point stacking for stackedGraph=true. | |
2427 | * | |
2428 | * For stacking purposes, interpolate or extend neighboring data across | |
2429 | * NaN values based on stackedGraphNaNFill settings. This is for display | |
2430 | * only, the underlying data value as shown in the legend remains NaN. | |
2431 | * | |
2432 | * @param {Array.<Dygraph.PointType>} points Point array for a single series. | |
2433 | * Updates each Point's yval_stacked property. | |
2434 | * @param {Array.<number>} cumulativeYval Accumulated top-of-graph stacked Y | |
2435 | * values for the series seen so far. Index is the row number. Updated | |
2436 | * based on the current series's values. | |
2437 | * @param {Array.<number>} seriesExtremes Min and max values, updated | |
2438 | * to reflect the stacked values. | |
2439 | * @param {string} fillMethod Interpolation method, one of 'all', 'inside', or | |
2440 | * 'none'. | |
24f2a74f | 2441 | * @private |
30a5cfc6 KW |
2442 | */ |
2443 | Dygraph.stackPoints_ = function( | |
2444 | points, cumulativeYval, seriesExtremes, fillMethod) { | |
2445 | var lastXval = null; | |
2446 | var prevPoint = null; | |
2447 | var nextPoint = null; | |
2448 | var nextPointIdx = -1; | |
2449 | ||
2450 | // Find the next stackable point starting from the given index. | |
bcc53a77 | 2451 | var updateNextPoint = function(idx) { |
30a5cfc6 KW |
2452 | // If we've previously found a non-NaN point and haven't gone past it yet, |
2453 | // just use that. | |
2454 | if (nextPointIdx >= idx) return; | |
2455 | ||
2456 | // We haven't found a non-NaN point yet or have moved past it, | |
2457 | // look towards the right to find a non-NaN point. | |
2458 | for (var j = idx; j < points.length; ++j) { | |
2459 | // Clear out a previously-found point (if any) since it's no longer | |
2460 | // valid, we shouldn't use it for interpolation anymore. | |
2461 | nextPoint = null; | |
2462 | if (!isNaN(points[j].yval) && points[j].yval !== null) { | |
2463 | nextPointIdx = j; | |
2464 | nextPoint = points[j]; | |
2465 | break; | |
2466 | } | |
2467 | } | |
2468 | }; | |
2469 | ||
2470 | for (var i = 0; i < points.length; ++i) { | |
2471 | var point = points[i]; | |
2472 | var xval = point.xval; | |
2473 | if (cumulativeYval[xval] === undefined) { | |
2474 | cumulativeYval[xval] = 0; | |
2475 | } | |
2476 | ||
2477 | var actualYval = point.yval; | |
2478 | if (isNaN(actualYval) || actualYval === null) { | |
06c0e1ee | 2479 | if(fillMethod == 'none') { |
30a5cfc6 | 2480 | actualYval = 0; |
d68137fd | 2481 | } else { |
06c0e1ee S |
2482 | // Interpolate/extend for stacking purposes if possible. |
2483 | updateNextPoint(i); | |
2484 | if (prevPoint && nextPoint && fillMethod != 'none') { | |
2485 | // Use linear interpolation between prevPoint and nextPoint. | |
2486 | actualYval = prevPoint.yval + (nextPoint.yval - prevPoint.yval) * | |
2487 | ((xval - prevPoint.xval) / (nextPoint.xval - prevPoint.xval)); | |
2488 | } else if (prevPoint && fillMethod == 'all') { | |
2489 | actualYval = prevPoint.yval; | |
2490 | } else if (nextPoint && fillMethod == 'all') { | |
2491 | actualYval = nextPoint.yval; | |
2492 | } else { | |
2493 | actualYval = 0; | |
2494 | } | |
30a5cfc6 KW |
2495 | } |
2496 | } else { | |
2497 | prevPoint = point; | |
2498 | } | |
2499 | ||
2500 | var stackedYval = cumulativeYval[xval]; | |
2501 | if (lastXval != xval) { | |
2502 | // If an x-value is repeated, we ignore the duplicates. | |
2503 | stackedYval += actualYval; | |
2504 | cumulativeYval[xval] = stackedYval; | |
2505 | } | |
2506 | lastXval = xval; | |
2507 | ||
2508 | point.yval_stacked = stackedYval; | |
2509 | ||
2510 | if (stackedYval > seriesExtremes[1]) { | |
2511 | seriesExtremes[1] = stackedYval; | |
2512 | } | |
2513 | if (stackedYval < seriesExtremes[0]) { | |
2514 | seriesExtremes[0] = stackedYval; | |
2515 | } | |
2516 | } | |
2517 | }; | |
2518 | ||
2519 | ||
2520 | /** | |
b1a3b195 DV |
2521 | * Loop over all fields and create datasets, calculating extreme y-values for |
2522 | * each series and extreme x-indices as we go. | |
fc4e84fa | 2523 | * |
b1a3b195 DV |
2524 | * dateWindow is passed in as an explicit parameter so that we can compute |
2525 | * extreme values "speculatively", i.e. without actually setting state on the | |
2526 | * dygraph. | |
fc4e84fa | 2527 | * |
30a5cfc6 KW |
2528 | * @param {Array.<Array.<Array.<(number|Array<number>)>>} rolledSeries, where |
2529 | * rolledSeries[seriesIndex][row] = raw point, where | |
2530 | * seriesIndex is the column number starting with 1, and | |
2531 | * rawPoint is [x,y] or [x, [y, err]] or [x, [y, yminus, yplus]]. | |
2532 | * @param {?Array.<number>} dateWindow [xmin, xmax] pair, or null. | |
2533 | * @return {{ | |
2534 | * points: Array.<Array.<Dygraph.PointType>>, | |
2535 | * seriesExtremes: Array.<Array.<number>>, | |
2536 | * boundaryIds: Array.<number>}} | |
6a1aa64f DV |
2537 | * @private |
2538 | */ | |
b1a3b195 DV |
2539 | Dygraph.prototype.gatherDatasets_ = function(rolledSeries, dateWindow) { |
2540 | var boundaryIds = []; | |
30a5cfc6 KW |
2541 | var points = []; |
2542 | var cumulativeYval = []; // For stacked series. | |
f09fc545 | 2543 | var extremes = {}; // series name -> [low, high] |
a49c164a DE |
2544 | var seriesIdx, sampleIdx; |
2545 | var firstIdx, lastIdx; | |
2546 | ||
b1a3b195 DV |
2547 | // Loop over the fields (series). Go from the last to the first, |
2548 | // because if they're stacked that's how we accumulate the values. | |
2549 | var num_series = rolledSeries.length - 1; | |
bcc53a77 | 2550 | var series; |
a49c164a DE |
2551 | for (seriesIdx = num_series; seriesIdx >= 1; seriesIdx--) { |
2552 | if (!this.visibility()[seriesIdx - 1]) continue; | |
1cf11047 | 2553 | |
6a1aa64f | 2554 | // Prune down to the desired range, if necessary (for zooming) |
1a26f3fb DV |
2555 | // Because there can be lines going to points outside of the visible area, |
2556 | // we actually prune to visible points, plus one on either side. | |
b1a3b195 | 2557 | if (dateWindow) { |
a49c164a | 2558 | series = rolledSeries[seriesIdx]; |
b1a3b195 DV |
2559 | var low = dateWindow[0]; |
2560 | var high = dateWindow[1]; | |
4e59e63e | 2561 | |
1a26f3fb DV |
2562 | // TODO(danvk): do binary search instead of linear search. |
2563 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. | |
a49c164a DE |
2564 | firstIdx = null; |
2565 | lastIdx = null; | |
2566 | for (sampleIdx = 0; sampleIdx < series.length; sampleIdx++) { | |
2567 | if (series[sampleIdx][0] >= low && firstIdx === null) { | |
2568 | firstIdx = sampleIdx; | |
1a26f3fb | 2569 | } |
a49c164a DE |
2570 | if (series[sampleIdx][0] <= high) { |
2571 | lastIdx = sampleIdx; | |
6a1aa64f DV |
2572 | } |
2573 | } | |
4e59e63e | 2574 | |
1a26f3fb | 2575 | if (firstIdx === null) firstIdx = 0; |
14ac984e | 2576 | var correctedFirstIdx = firstIdx; |
b0375a28 | 2577 | var isInvalidValue = true; |
4e59e63e | 2578 | while (isInvalidValue && correctedFirstIdx > 0) { |
14ac984e | 2579 | correctedFirstIdx--; |
a49c164a DE |
2580 | // check if the y value is null. |
2581 | isInvalidValue = series[correctedFirstIdx][1] === null; | |
14ac984e | 2582 | } |
4e59e63e | 2583 | |
1a26f3fb | 2584 | if (lastIdx === null) lastIdx = series.length - 1; |
14ac984e | 2585 | var correctedLastIdx = lastIdx; |
b0375a28 | 2586 | isInvalidValue = true; |
4e59e63e | 2587 | while (isInvalidValue && correctedLastIdx < series.length - 1) { |
14ac984e | 2588 | correctedLastIdx++; |
a49c164a | 2589 | isInvalidValue = series[correctedLastIdx][1] === null; |
14ac984e | 2590 | } |
4e59e63e | 2591 | |
4e59e63e | 2592 | if (correctedFirstIdx!==firstIdx) { |
30a5cfc6 | 2593 | firstIdx = correctedFirstIdx; |
6a1aa64f | 2594 | } |
4e59e63e | 2595 | if (correctedLastIdx !== lastIdx) { |
30a5cfc6 | 2596 | lastIdx = correctedLastIdx; |
4e59e63e | 2597 | } |
55231c07 | 2598 | |
a49c164a | 2599 | boundaryIds[seriesIdx-1] = [firstIdx, lastIdx]; |
55231c07 | 2600 | |
30a5cfc6 KW |
2601 | // .slice's end is exclusive, we want to include lastIdx. |
2602 | series = series.slice(firstIdx, lastIdx + 1); | |
16269f6e | 2603 | } else { |
a49c164a DE |
2604 | series = rolledSeries[seriesIdx]; |
2605 | boundaryIds[seriesIdx-1] = [0, series.length-1]; | |
6a1aa64f DV |
2606 | } |
2607 | ||
a49c164a DE |
2608 | var seriesName = this.attr_("labels")[seriesIdx]; |
2609 | var seriesExtremes = this.dataHandler_.getExtremeYValues(series, | |
b0963cdb | 2610 | dateWindow, this.getBooleanOption("stepPlot",seriesName)); |
5011e7a1 | 2611 | |
a49c164a DE |
2612 | var seriesPoints = this.dataHandler_.seriesToPoints(series, |
2613 | seriesName, boundaryIds[seriesIdx-1][0]); | |
43af96e7 | 2614 | |
b0963cdb | 2615 | if (this.getBooleanOption("stackedGraph")) { |
30a5cfc6 | 2616 | Dygraph.stackPoints_(seriesPoints, cumulativeYval, seriesExtremes, |
b0963cdb | 2617 | this.getBooleanOption("stackedGraphNaNFill")); |
6a1aa64f | 2618 | } |
354e15ab | 2619 | |
b1a3b195 | 2620 | extremes[seriesName] = seriesExtremes; |
a49c164a | 2621 | points[seriesIdx] = seriesPoints; |
7d463f49 KW |
2622 | } |
2623 | ||
30a5cfc6 | 2624 | return { points: points, extremes: extremes, boundaryIds: boundaryIds }; |
b1a3b195 DV |
2625 | }; |
2626 | ||
2627 | /** | |
2628 | * Update the graph with new data. This method is called when the viewing area | |
2629 | * has changed. If the underlying data or options have changed, predraw_ will | |
2630 | * be called before drawGraph_ is called. | |
2631 | * | |
b1a3b195 DV |
2632 | * @private |
2633 | */ | |
e2c21500 | 2634 | Dygraph.prototype.drawGraph_ = function() { |
b1a3b195 DV |
2635 | var start = new Date(); |
2636 | ||
b1a3b195 DV |
2637 | // This is used to set the second parameter to drawCallback, below. |
2638 | var is_initial_draw = this.is_initial_draw_; | |
2639 | this.is_initial_draw_ = false; | |
2640 | ||
b1a3b195 DV |
2641 | this.layout_.removeAllDatasets(); |
2642 | this.setColors_(); | |
b0963cdb | 2643 | this.attrs_.pointSize = 0.5 * this.getNumericOption('highlightCircleSize'); |
b1a3b195 DV |
2644 | |
2645 | var packed = this.gatherDatasets_(this.rolledSeries_, this.dateWindow_); | |
30a5cfc6 KW |
2646 | var points = packed.points; |
2647 | var extremes = packed.extremes; | |
2648 | this.boundaryIds_ = packed.boundaryIds; | |
b1a3b195 | 2649 | |
82c6fe4d KW |
2650 | this.setIndexByName_ = {}; |
2651 | var labels = this.attr_("labels"); | |
2652 | if (labels.length > 0) { | |
2653 | this.setIndexByName_[labels[0]] = 0; | |
2654 | } | |
857a6931 | 2655 | var dataIdx = 0; |
30a5cfc6 | 2656 | for (var i = 1; i < points.length; i++) { |
82c6fe4d | 2657 | this.setIndexByName_[labels[i]] = i; |
4523c1f6 | 2658 | if (!this.visibility()[i - 1]) continue; |
30a5cfc6 | 2659 | this.layout_.addDataset(labels[i], points[i]); |
857a6931 | 2660 | this.datasetIndex_[i] = dataIdx++; |
43af96e7 NK |
2661 | } |
2662 | ||
6faebb69 | 2663 | this.computeYAxisRanges_(extremes); |
b2c9222a DV |
2664 | this.layout_.setYAxes(this.axes_); |
2665 | ||
6a1aa64f DV |
2666 | this.addXTicks_(); |
2667 | ||
b2c9222a | 2668 | // Save the X axis zoomed status as the updateOptions call will tend to set it erroneously |
81856f70 | 2669 | var tmp_zoomed_x = this.zoomed_x_; |
6a1aa64f | 2670 | // Tell PlotKit to use this new data and render itself |
81856f70 | 2671 | this.zoomed_x_ = tmp_zoomed_x; |
30a5cfc6 | 2672 | this.layout_.evaluate(); |
e2c21500 | 2673 | this.renderGraph_(is_initial_draw); |
9ca829f2 | 2674 | |
b0963cdb | 2675 | if (this.getStringOption("timingName")) { |
9ca829f2 | 2676 | var end = new Date(); |
b0963cdb | 2677 | Dygraph.info(this.getStringOption("timingName") + " - drawGraph: " + (end - start) + "ms"); |
9ca829f2 DV |
2678 | } |
2679 | }; | |
2680 | ||
e2c21500 DV |
2681 | /** |
2682 | * This does the work of drawing the chart. It assumes that the layout and axis | |
2683 | * scales have already been set (e.g. by predraw_). | |
2684 | * | |
2685 | * @private | |
2686 | */ | |
2687 | Dygraph.prototype.renderGraph_ = function(is_initial_draw) { | |
1748a51c | 2688 | this.cascadeEvents_('clearChart'); |
6a1aa64f | 2689 | this.plotter_.clear(); |
f417e3d3 | 2690 | |
b0963cdb | 2691 | if (this.getFunctionOption('underlayCallback')) { |
98eb4713 DV |
2692 | // NOTE: we pass the dygraph object to this callback twice to avoid breaking |
2693 | // users who expect a deprecated form of this callback. | |
b0963cdb | 2694 | this.getFunctionOption('underlayCallback')( |
98eb4713 DV |
2695 | this.hidden_ctx_, this.layout_.getPlotArea(), this, this); |
2696 | } | |
2697 | ||
2698 | var e = { | |
189f8030 | 2699 | canvas: this.hidden_, |
2de7166c | 2700 | drawingContext: this.hidden_ctx_ |
98eb4713 DV |
2701 | }; |
2702 | this.cascadeEvents_('willDrawChart', e); | |
6a1aa64f | 2703 | this.plotter_.render(); |
98eb4713 | 2704 | this.cascadeEvents_('didDrawChart', e); |
fa11f4e4 | 2705 | this.lastRow_ = -1; // because plugins/legend.js clears the legend |
8cfe592f DV |
2706 | |
2707 | // TODO(danvk): is this a performance bottleneck when panning? | |
2708 | // The interaction canvas should already be empty in that situation. | |
f6401bf6 | 2709 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
2f5e7e1a | 2710 | this.canvas_.height); |
599fb4ad | 2711 | |
b0963cdb DV |
2712 | if (this.getFunctionOption("drawCallback") !== null) { |
2713 | this.getFunctionOption("drawCallback")(this, is_initial_draw); | |
599fb4ad | 2714 | } |
5bcc58b4 DV |
2715 | if (is_initial_draw) { |
2716 | this.readyFired_ = true; | |
2717 | while (this.readyFns_.length > 0) { | |
2718 | var fn = this.readyFns_.pop(); | |
2719 | fn(this); | |
2720 | } | |
2721 | } | |
6a1aa64f DV |
2722 | }; |
2723 | ||
2724 | /** | |
629a09ae | 2725 | * @private |
26ca7938 DV |
2726 | * Determine properties of the y-axes which are independent of the data |
2727 | * currently being displayed. This includes things like the number of axes and | |
2728 | * the style of the axes. It does not include the range of each axis and its | |
2729 | * tick marks. | |
16f00742 | 2730 | * This fills in this.axes_. |
26ca7938 | 2731 | * axes_ = [ { options } ] |
26ca7938 | 2732 | * indices are into the axes_ array. |
f09fc545 | 2733 | */ |
26ca7938 | 2734 | Dygraph.prototype.computeYAxes_ = function() { |
d64b8fea RK |
2735 | // Preserve valueWindow settings if they exist, and if the user hasn't |
2736 | // specified a new valueRange. | |
0cd1ad15 | 2737 | var valueWindows, axis, index, opts, v; |
758a629f | 2738 | if (this.axes_ !== undefined && this.user_attrs_.hasOwnProperty("valueRange") === false) { |
d64b8fea | 2739 | valueWindows = []; |
758a629f | 2740 | for (index = 0; index < this.axes_.length; index++) { |
d64b8fea RK |
2741 | valueWindows.push(this.axes_[index].valueWindow); |
2742 | } | |
2743 | } | |
2744 | ||
6ad8b6a4 RK |
2745 | // this.axes_ doesn't match this.attributes_.axes_.options. It's used for |
2746 | // data computation as well as options storage. | |
f09fc545 | 2747 | // Go through once and add all the axes. |
02c93ff5 | 2748 | this.axes_ = []; |
0d216a60 | 2749 | |
02c93ff5 | 2750 | for (axis = 0; axis < this.attributes_.numAxes(); axis++) { |
6ad8b6a4 | 2751 | // Add a new axis, making a copy of its per-axis options. |
02c93ff5 | 2752 | opts = { g : this }; |
6ad8b6a4 RK |
2753 | Dygraph.update(opts, this.attributes_.axisOptions(axis)); |
2754 | this.axes_[axis] = opts; | |
f09fc545 | 2755 | } |
1c77a3a1 | 2756 | |
7740dd00 RK |
2757 | |
2758 | // Copy global valueRange option over to the first axis. | |
2759 | // NOTE(konigsberg): Are these two statements necessary? | |
2760 | // I tried removing it. The automated tests pass, and manually | |
2761 | // messing with tests/zoom.html showed no trouble. | |
2762 | v = this.attr_('valueRange'); | |
2763 | if (v) this.axes_[0].valueRange = v; | |
478b866b | 2764 | |
758a629f | 2765 | if (valueWindows !== undefined) { |
d64b8fea | 2766 | // Restore valueWindow settings. |
4ecb55b5 RK |
2767 | |
2768 | // When going from two axes back to one, we only restore | |
2769 | // one axis. | |
2770 | var idxCount = Math.min(valueWindows.length, this.axes_.length); | |
2771 | ||
2772 | for (index = 0; index < idxCount; index++) { | |
d64b8fea RK |
2773 | this.axes_[index].valueWindow = valueWindows[index]; |
2774 | } | |
2775 | } | |
4dd0ac55 | 2776 | |
4dd0ac55 RV |
2777 | for (axis = 0; axis < this.axes_.length; axis++) { |
2778 | if (axis === 0) { | |
2779 | opts = this.optionsViewForAxis_('y' + (axis ? '2' : '')); | |
2780 | v = opts("valueRange"); | |
2781 | if (v) this.axes_[axis].valueRange = v; | |
2782 | } else { // To keep old behavior | |
2783 | var axes = this.user_attrs_.axes; | |
2784 | if (axes && axes.y2) { | |
2785 | v = axes.y2.valueRange; | |
2786 | if (v) this.axes_[axis].valueRange = v; | |
2787 | } | |
2788 | } | |
2789 | } | |
26ca7938 DV |
2790 | }; |
2791 | ||
2792 | /** | |
2793 | * Returns the number of y-axes on the chart. | |
1bc88216 | 2794 | * @return {number} the number of axes. |
26ca7938 DV |
2795 | */ |
2796 | Dygraph.prototype.numAxes = function() { | |
16f00742 | 2797 | return this.attributes_.numAxes(); |
26ca7938 DV |
2798 | }; |
2799 | ||
2800 | /** | |
629a09ae | 2801 | * @private |
b2c9222a | 2802 | * Returns axis properties for the given series. |
1bc88216 | 2803 | * @param {string} setName The name of the series for which to get axis |
b2c9222a | 2804 | * properties, e.g. 'Y1'. |
1bc88216 | 2805 | * @return {Object} The axis properties. |
b2c9222a DV |
2806 | */ |
2807 | Dygraph.prototype.axisPropertiesForSeries = function(series) { | |
2808 | // TODO(danvk): handle errors. | |
16f00742 | 2809 | return this.axes_[this.attributes_.axisForSeries(series)]; |
b2c9222a DV |
2810 | }; |
2811 | ||
2812 | /** | |
2813 | * @private | |
26ca7938 DV |
2814 | * Determine the value range and tick marks for each axis. |
2815 | * @param {Object} extremes A mapping from seriesName -> [low, high] | |
2816 | * This fills in the valueRange and ticks fields in each entry of this.axes_. | |
2817 | */ | |
2818 | Dygraph.prototype.computeYAxisRanges_ = function(extremes) { | |
9adc2c33 | 2819 | var isNullUndefinedOrNaN = function(num) { |
126bf1e3 | 2820 | return isNaN(parseFloat(num)); |
6b05851c | 2821 | }; |
16f00742 | 2822 | var numAxes = this.attributes_.numAxes(); |
4bac38d8 | 2823 | var ypadCompat, span, series, ypad; |
9e906ae6 DE |
2824 | |
2825 | var p_axis; | |
f09fc545 DV |
2826 | |
2827 | // Compute extreme values, a span and tick marks for each axis. | |
16f00742 | 2828 | for (var i = 0; i < numAxes; i++) { |
26ca7938 | 2829 | var axis = this.axes_[i]; |
ec40f67c RK |
2830 | var logscale = this.attributes_.getForAxis("logscale", i); |
2831 | var includeZero = this.attributes_.getForAxis("includeZero", i); | |
9e906ae6 | 2832 | var independentTicks = this.attributes_.getForAxis("independentTicks", i); |
6ad8b6a4 RK |
2833 | series = this.attributes_.seriesForAxis(i); |
2834 | ||
31a8d0cd | 2835 | // Add some padding. This supports two Y padding operation modes: |
2836 | // | |
2837 | // - backwards compatible (yRangePad not set): | |
2838 | // 10% padding for automatic Y ranges, but not for user-supplied | |
2839 | // ranges, and move a close-to-zero edge to zero except if | |
2840 | // avoidMinZero is set, since drawing at the edge results in | |
2841 | // invisible lines. Unfortunately lines drawn at the edge of a | |
2842 | // user-supplied range will still be invisible. If logscale is | |
2843 | // set, add a variable amount of padding at the top but | |
2844 | // none at the bottom. | |
2845 | // | |
2846 | // - new-style (yRangePad set by the user): | |
2847 | // always add the specified Y padding. | |
2848 | // | |
2849 | ypadCompat = true; | |
2850 | ypad = 0.1; // add 10% | |
b0963cdb | 2851 | if (this.getNumericOption('yRangePad') !== null) { |
31a8d0cd | 2852 | ypadCompat = false; |
2853 | // Convert pixel padding to ratio | |
b0963cdb | 2854 | ypad = this.getNumericOption('yRangePad') / this.plotter_.area.h; |
31a8d0cd | 2855 | } |
2856 | ||
83b0c192 | 2857 | if (series.length === 0) { |
06fc69b6 AV |
2858 | // If no series are defined or visible then use a reasonable default |
2859 | axis.extremeRange = [0, 1]; | |
2860 | } else { | |
1c77a3a1 | 2861 | // Calculate the extremes of extremes. |
f09fc545 DV |
2862 | var minY = Infinity; // extremes[series[0]][0]; |
2863 | var maxY = -Infinity; // extremes[series[0]][1]; | |
ba049b89 | 2864 | var extremeMinY, extremeMaxY; |
a2da3777 | 2865 | |
f09fc545 | 2866 | for (var j = 0; j < series.length; j++) { |
a2da3777 DV |
2867 | // this skips invisible series |
2868 | if (!extremes.hasOwnProperty(series[j])) continue; | |
2869 | ||
ba049b89 NN |
2870 | // Only use valid extremes to stop null data series' from corrupting the scale. |
2871 | extremeMinY = extremes[series[j]][0]; | |
758a629f | 2872 | if (extremeMinY !== null) { |
36dfa958 | 2873 | minY = Math.min(extremeMinY, minY); |
ba049b89 NN |
2874 | } |
2875 | extremeMaxY = extremes[series[j]][1]; | |
758a629f | 2876 | if (extremeMaxY !== null) { |
36dfa958 | 2877 | maxY = Math.max(extremeMaxY, maxY); |
ba049b89 | 2878 | } |
f09fc545 | 2879 | } |
fa460473 KW |
2880 | |
2881 | // Include zero if requested by the user. | |
2882 | if (includeZero && !logscale) { | |
2883 | if (minY > 0) minY = 0; | |
2884 | if (maxY < 0) maxY = 0; | |
2885 | } | |
f09fc545 | 2886 | |
a2da3777 | 2887 | // Ensure we have a valid scale, otherwise default to [0, 1] for safety. |
36dfa958 | 2888 | if (minY == Infinity) minY = 0; |
a2da3777 | 2889 | if (maxY == -Infinity) maxY = 1; |
ba049b89 | 2890 | |
4bac38d8 | 2891 | span = maxY - minY; |
fa460473 KW |
2892 | // special case: if we have no sense of scale, center on the sole value. |
2893 | if (span === 0) { | |
2894 | if (maxY !== 0) { | |
2895 | span = Math.abs(maxY); | |
2896 | } else { | |
2897 | // ... and if the sole value is zero, use range 0-1. | |
2898 | maxY = 1; | |
2899 | span = 1; | |
2900 | } | |
2901 | } | |
2902 | ||
758a629f | 2903 | var maxAxisY, minAxisY; |
ec40f67c | 2904 | if (logscale) { |
fa460473 KW |
2905 | if (ypadCompat) { |
2906 | maxAxisY = maxY + ypad * span; | |
2907 | minAxisY = minY; | |
2908 | } else { | |
2909 | var logpad = Math.exp(Math.log(span) * ypad); | |
2910 | maxAxisY = maxY * logpad; | |
2911 | minAxisY = minY / logpad; | |
2912 | } | |
ff022deb | 2913 | } else { |
fa460473 KW |
2914 | maxAxisY = maxY + ypad * span; |
2915 | minAxisY = minY - ypad * span; | |
f09fc545 | 2916 | |
fa460473 KW |
2917 | // Backwards-compatible behavior: Move the span to start or end at zero if it's |
2918 | // close to zero, but not if avoidMinZero is set. | |
b0963cdb | 2919 | if (ypadCompat && !this.getBooleanOption("avoidMinZero")) { |
ff022deb RK |
2920 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; |
2921 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
2922 | } | |
f09fc545 | 2923 | } |
4cac8c7a RK |
2924 | axis.extremeRange = [minAxisY, maxAxisY]; |
2925 | } | |
2926 | if (axis.valueWindow) { | |
2927 | // This is only set if the user has zoomed on the y-axis. It is never set | |
2928 | // by a user. It takes precedence over axis.valueRange because, if you set | |
2929 | // valueRange, you'd still expect to be able to pan. | |
2930 | axis.computedValueRange = [axis.valueWindow[0], axis.valueWindow[1]]; | |
2931 | } else if (axis.valueRange) { | |
2932 | // This is a user-set value range for this axis. | |
fa460473 KW |
2933 | var y0 = isNullUndefinedOrNaN(axis.valueRange[0]) ? axis.extremeRange[0] : axis.valueRange[0]; |
2934 | var y1 = isNullUndefinedOrNaN(axis.valueRange[1]) ? axis.extremeRange[1] : axis.valueRange[1]; | |
2935 | if (!ypadCompat) { | |
2936 | if (axis.logscale) { | |
2937 | var logpad = Math.exp(Math.log(span) * ypad); | |
2938 | y0 *= logpad; | |
2939 | y1 /= logpad; | |
2940 | } else { | |
4bac38d8 | 2941 | span = y1 - y0; |
fa460473 KW |
2942 | y0 -= span * ypad; |
2943 | y1 += span * ypad; | |
2944 | } | |
2945 | } | |
2946 | axis.computedValueRange = [y0, y1]; | |
4cac8c7a RK |
2947 | } else { |
2948 | axis.computedValueRange = axis.extremeRange; | |
f09fc545 | 2949 | } |
9e906ae6 DE |
2950 | |
2951 | ||
383d8473 | 2952 | if (independentTicks) { |
9e906ae6 DE |
2953 | axis.independentTicks = independentTicks; |
2954 | var opts = this.optionsViewForAxis_('y' + (i ? '2' : '')); | |
2955 | var ticker = opts('ticker'); | |
48e614ac | 2956 | axis.ticks = ticker(axis.computedValueRange[0], |
9e906ae6 DE |
2957 | axis.computedValueRange[1], |
2958 | this.height_, // TODO(danvk): should be area.height | |
2959 | opts, | |
2960 | this); | |
6c5f8774 | 2961 | // Define the first independent axis as primary axis. |
e8b3c7b4 | 2962 | if (!p_axis) p_axis = axis; |
9e906ae6 DE |
2963 | } |
2964 | } | |
e8b3c7b4 | 2965 | if (p_axis === undefined) { |
eba6dd23 | 2966 | throw ("Configuration Error: At least one axis has to have the \"independentTicks\" option activated."); |
e8b3c7b4 | 2967 | } |
9e906ae6 DE |
2968 | // Add ticks. By default, all axes inherit the tick positions of the |
2969 | // primary axis. However, if an axis is specifically marked as having | |
2970 | // independent ticks, then that is permissible as well. | |
2971 | for (var i = 0; i < numAxes; i++) { | |
2972 | var axis = this.axes_[i]; | |
2973 | ||
2974 | if (!axis.independentTicks) { | |
2975 | var opts = this.optionsViewForAxis_('y' + (i ? '2' : '')); | |
2976 | var ticker = opts('ticker'); | |
0d64e596 DV |
2977 | var p_ticks = p_axis.ticks; |
2978 | var p_scale = p_axis.computedValueRange[1] - p_axis.computedValueRange[0]; | |
2979 | var scale = axis.computedValueRange[1] - axis.computedValueRange[0]; | |
2980 | var tick_values = []; | |
25f76ae3 DV |
2981 | for (var k = 0; k < p_ticks.length; k++) { |
2982 | var y_frac = (p_ticks[k].v - p_axis.computedValueRange[0]) / p_scale; | |
0d64e596 DV |
2983 | var y_val = axis.computedValueRange[0] + y_frac * scale; |
2984 | tick_values.push(y_val); | |
2985 | } | |
2986 | ||
48e614ac DV |
2987 | axis.ticks = ticker(axis.computedValueRange[0], |
2988 | axis.computedValueRange[1], | |
2989 | this.height_, // TODO(danvk): should be area.height | |
2990 | opts, | |
2991 | this, | |
2992 | tick_values); | |
0d64e596 | 2993 | } |
34fc91d4 | 2994 | } |
f09fc545 | 2995 | }; |
25f76ae3 | 2996 | |
f09fc545 | 2997 | /** |
285a6bda DV |
2998 | * Detects the type of the str (date or numeric) and sets the various |
2999 | * formatting attributes in this.attrs_ based on this type. | |
1bc88216 | 3000 | * @param {string} str An x value. |
285a6bda DV |
3001 | * @private |
3002 | */ | |
3003 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
3004 | var isDate = false; | |
0842b24b DV |
3005 | var dashPos = str.indexOf('-'); // could be 2006-01-01 _or_ 1.0e-2 |
3006 | if ((dashPos > 0 && (str[dashPos-1] != 'e' && str[dashPos-1] != 'E')) || | |
285a6bda DV |
3007 | str.indexOf('/') >= 0 || |
3008 | isNaN(parseFloat(str))) { | |
3009 | isDate = true; | |
3010 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
3011 | // TODO(danvk): remove support for this format. | |
3012 | isDate = true; | |
3013 | } | |
3014 | ||
a716aff2 RK |
3015 | this.setXAxisOptions_(isDate); |
3016 | }; | |
3017 | ||
3018 | Dygraph.prototype.setXAxisOptions_ = function(isDate) { | |
285a6bda | 3019 | if (isDate) { |
285a6bda | 3020 | this.attrs_.xValueParser = Dygraph.dateParser; |
872a6a00 | 3021 | this.attrs_.axes.x.valueFormatter = Dygraph.dateValueFormatter; |
48e614ac | 3022 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; |
872a6a00 | 3023 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisLabelFormatter; |
285a6bda | 3024 | } else { |
c39e1d93 | 3025 | /** @private (shut up, jsdoc!) */ |
285a6bda | 3026 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
48e614ac DV |
3027 | // TODO(danvk): use Dygraph.numberValueFormatter here? |
3028 | /** @private (shut up, jsdoc!) */ | |
3029 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; | |
5b9b2142 | 3030 | this.attrs_.axes.x.ticker = Dygraph.numericTicks; |
48e614ac | 3031 | this.attrs_.axes.x.axisLabelFormatter = this.attrs_.axes.x.valueFormatter; |
6a1aa64f | 3032 | } |
83b0c192 | 3033 | }; |
6a1aa64f DV |
3034 | |
3035 | /** | |
629a09ae | 3036 | * @private |
6a1aa64f DV |
3037 | * Parses a string in a special csv format. We expect a csv file where each |
3038 | * line is a date point, and the first field in each line is the date string. | |
3039 | * We also expect that all remaining fields represent series. | |
285a6bda | 3040 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f | 3041 | * date, series1, stddev1, series2, stddev2, ... |
629a09ae | 3042 | * @param {[Object]} data See above. |
285a6bda | 3043 | * |
629a09ae | 3044 | * @return [Object] An array with one entry for each row. These entries |
285a6bda DV |
3045 | * are an array of cells in that row. The first entry is the parsed x-value for |
3046 | * the row. The second, third, etc. are the y-values. These can take on one of | |
3047 | * three forms, depending on the CSV and constructor parameters: | |
3048 | * 1. numeric value | |
3049 | * 2. [ value, stddev ] | |
3050 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 3051 | */ |
285a6bda | 3052 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f | 3053 | var ret = []; |
e5763589 DV |
3054 | var line_delimiter = Dygraph.detectLineDelimiter(data); |
3055 | var lines = data.split(line_delimiter || "\n"); | |
758a629f | 3056 | var vals, j; |
3d67f03b DV |
3057 | |
3058 | // Use the default delimiter or fall back to a tab if that makes sense. | |
b0963cdb | 3059 | var delim = this.getStringOption('delimiter'); |
3d67f03b DV |
3060 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { |
3061 | delim = '\t'; | |
3062 | } | |
3063 | ||
285a6bda | 3064 | var start = 0; |
d7beab6b DV |
3065 | if (!('labels' in this.user_attrs_)) { |
3066 | // User hasn't explicitly set labels, so they're (presumably) in the CSV. | |
285a6bda | 3067 | start = 1; |
d7beab6b | 3068 | this.attrs_.labels = lines[0].split(delim); // NOTE: _not_ user_attrs_. |
34825ef5 | 3069 | this.attributes_.reparseSeries(); |
6a1aa64f | 3070 | } |
5cd7ac68 | 3071 | var line_no = 0; |
03b522a4 | 3072 | |
285a6bda DV |
3073 | var xParser; |
3074 | var defaultParserSet = false; // attempt to auto-detect x value type | |
3075 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 3076 | var outOfOrder = false; |
6a1aa64f DV |
3077 | for (var i = start; i < lines.length; i++) { |
3078 | var line = lines[i]; | |
5cd7ac68 | 3079 | line_no = i; |
758a629f | 3080 | if (line.length === 0) continue; // skip blank lines |
3d67f03b DV |
3081 | if (line[0] == '#') continue; // skip comment lines |
3082 | var inFields = line.split(delim); | |
285a6bda | 3083 | if (inFields.length < 2) continue; |
6a1aa64f DV |
3084 | |
3085 | var fields = []; | |
285a6bda DV |
3086 | if (!defaultParserSet) { |
3087 | this.detectTypeFromString_(inFields[0]); | |
b0963cdb | 3088 | xParser = this.getFunctionOption("xValueParser"); |
285a6bda DV |
3089 | defaultParserSet = true; |
3090 | } | |
3091 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
3092 | |
3093 | // If fractions are expected, parse the numbers as "A/B" | |
3094 | if (this.fractions_) { | |
758a629f | 3095 | for (j = 1; j < inFields.length; j++) { |
6a1aa64f | 3096 | // TODO(danvk): figure out an appropriate way to flag parse errors. |
758a629f | 3097 | vals = inFields[j].split("/"); |
7219edb3 | 3098 | if (vals.length != 2) { |
464b5f50 DV |
3099 | Dygraph.error('Expected fractional "num/den" values in CSV data ' + |
3100 | "but found a value '" + inFields[j] + "' on line " + | |
3101 | (1 + i) + " ('" + line + "') which is not of this form."); | |
7219edb3 DV |
3102 | fields[j] = [0, 0]; |
3103 | } else { | |
55deb02f DV |
3104 | fields[j] = [Dygraph.parseFloat_(vals[0], i, line), |
3105 | Dygraph.parseFloat_(vals[1], i, line)]; | |
7219edb3 | 3106 | } |
6a1aa64f | 3107 | } |
b0963cdb | 3108 | } else if (this.getBooleanOption("errorBars")) { |
6a1aa64f | 3109 | // If there are error bars, values are (value, stddev) pairs |
7219edb3 | 3110 | if (inFields.length % 2 != 1) { |
464b5f50 DV |
3111 | Dygraph.error('Expected alternating (value, stdev.) pairs in CSV data ' + |
3112 | 'but line ' + (1 + i) + ' has an odd number of values (' + | |
3113 | (inFields.length - 1) + "): '" + line + "'"); | |
7219edb3 | 3114 | } |
758a629f | 3115 | for (j = 1; j < inFields.length; j += 2) { |
55deb02f DV |
3116 | fields[(j + 1) / 2] = [Dygraph.parseFloat_(inFields[j], i, line), |
3117 | Dygraph.parseFloat_(inFields[j + 1], i, line)]; | |
7219edb3 | 3118 | } |
b0963cdb | 3119 | } else if (this.getBooleanOption("customBars")) { |
6a1aa64f | 3120 | // Bars are a low;center;high tuple |
758a629f | 3121 | for (j = 1; j < inFields.length; j++) { |
327a9279 DV |
3122 | var val = inFields[j]; |
3123 | if (/^ *$/.test(val)) { | |
3124 | fields[j] = [null, null, null]; | |
3125 | } else { | |
758a629f | 3126 | vals = val.split(";"); |
327a9279 | 3127 | if (vals.length == 3) { |
55deb02f DV |
3128 | fields[j] = [ Dygraph.parseFloat_(vals[0], i, line), |
3129 | Dygraph.parseFloat_(vals[1], i, line), | |
3130 | Dygraph.parseFloat_(vals[2], i, line) ]; | |
327a9279 | 3131 | } else { |
464b5f50 DV |
3132 | Dygraph.warn('When using customBars, values must be either blank ' + |
3133 | 'or "low;center;high" tuples (got "' + val + | |
3134 | '" on line ' + (1+i)); | |
327a9279 DV |
3135 | } |
3136 | } | |
6a1aa64f DV |
3137 | } |
3138 | } else { | |
3139 | // Values are just numbers | |
758a629f | 3140 | for (j = 1; j < inFields.length; j++) { |
55deb02f | 3141 | fields[j] = Dygraph.parseFloat_(inFields[j], i, line); |
285a6bda | 3142 | } |
6a1aa64f | 3143 | } |
987840a2 DV |
3144 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
3145 | outOfOrder = true; | |
3146 | } | |
285a6bda DV |
3147 | |
3148 | if (fields.length != expectedCols) { | |
464b5f50 DV |
3149 | Dygraph.error("Number of columns in line " + i + " (" + fields.length + |
3150 | ") does not agree with number of labels (" + expectedCols + | |
3151 | ") " + line); | |
285a6bda | 3152 | } |
6d0aaa09 DV |
3153 | |
3154 | // If the user specified the 'labels' option and none of the cells of the | |
3155 | // first row parsed correctly, then they probably double-specified the | |
3156 | // labels. We go with the values set in the option, discard this row and | |
3157 | // log a warning to the JS console. | |
758a629f | 3158 | if (i === 0 && this.attr_('labels')) { |
6d0aaa09 | 3159 | var all_null = true; |
758a629f | 3160 | for (j = 0; all_null && j < fields.length; j++) { |
6d0aaa09 DV |
3161 | if (fields[j]) all_null = false; |
3162 | } | |
3163 | if (all_null) { | |
464b5f50 DV |
3164 | Dygraph.warn("The dygraphs 'labels' option is set, but the first row " + |
3165 | "of CSV data ('" + line + "') appears to also contain " + | |
3166 | "labels. Will drop the CSV labels and use the option " + | |
3167 | "labels."); | |
6d0aaa09 DV |
3168 | continue; |
3169 | } | |
3170 | } | |
3171 | ret.push(fields); | |
6a1aa64f | 3172 | } |
987840a2 DV |
3173 | |
3174 | if (outOfOrder) { | |
464b5f50 | 3175 | Dygraph.warn("CSV is out of order; order it correctly to speed loading."); |
758a629f | 3176 | ret.sort(function(a,b) { return a[0] - b[0]; }); |
987840a2 DV |
3177 | } |
3178 | ||
6a1aa64f DV |
3179 | return ret; |
3180 | }; | |
3181 | ||
3182 | /** | |
285a6bda DV |
3183 | * The user has provided their data as a pre-packaged JS array. If the x values |
3184 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
3185 | * are dates, we need to convert them from Date objects to ms since epoch. | |
8ef9d44d DV |
3186 | * @param {!Array} data |
3187 | * @return {Object} data with numeric x values. | |
3188 | * @private | |
285a6bda DV |
3189 | */ |
3190 | Dygraph.prototype.parseArray_ = function(data) { | |
3191 | // Peek at the first x value to see if it's numeric. | |
758a629f | 3192 | if (data.length === 0) { |
464b5f50 | 3193 | Dygraph.error("Can't plot empty data set"); |
285a6bda DV |
3194 | return null; |
3195 | } | |
758a629f | 3196 | if (data[0].length === 0) { |
464b5f50 | 3197 | Dygraph.error("Data set cannot contain an empty row"); |
285a6bda DV |
3198 | return null; |
3199 | } | |
3200 | ||
758a629f DV |
3201 | var i; |
3202 | if (this.attr_("labels") === null) { | |
464b5f50 DV |
3203 | Dygraph.warn("Using default labels. Set labels explicitly via 'labels' " + |
3204 | "in the options parameter"); | |
285a6bda | 3205 | this.attrs_.labels = [ "X" ]; |
758a629f | 3206 | for (i = 1; i < data[0].length; i++) { |
77812e0e | 3207 | this.attrs_.labels.push("Y" + i); // Not user_attrs_. |
285a6bda | 3208 | } |
77812e0e | 3209 | this.attributes_.reparseSeries(); |
debdb88d DV |
3210 | } else { |
3211 | var num_labels = this.attr_("labels"); | |
3212 | if (num_labels.length != data[0].length) { | |
464b5f50 DV |
3213 | Dygraph.error("Mismatch between number of labels (" + num_labels + ")" + |
3214 | " and number of columns in array (" + data[0].length + ")"); | |
debdb88d DV |
3215 | return null; |
3216 | } | |
285a6bda DV |
3217 | } |
3218 | ||
2dda3850 | 3219 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda | 3220 | // Some intelligent defaults for a date x-axis. |
872a6a00 | 3221 | this.attrs_.axes.x.valueFormatter = Dygraph.dateValueFormatter; |
48e614ac | 3222 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; |
872a6a00 | 3223 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisLabelFormatter; |
285a6bda DV |
3224 | |
3225 | // Assume they're all dates. | |
e3ab7b40 | 3226 | var parsedData = Dygraph.clone(data); |
758a629f DV |
3227 | for (i = 0; i < data.length; i++) { |
3228 | if (parsedData[i].length === 0) { | |
464b5f50 | 3229 | Dygraph.error("Row " + (1 + i) + " of data is empty"); |
285a6bda DV |
3230 | return null; |
3231 | } | |
758a629f DV |
3232 | if (parsedData[i][0] === null || |
3233 | typeof(parsedData[i][0].getTime) != 'function' || | |
3234 | isNaN(parsedData[i][0].getTime())) { | |
464b5f50 | 3235 | Dygraph.error("x value in row " + (1 + i) + " is not a Date"); |
285a6bda DV |
3236 | return null; |
3237 | } | |
3238 | parsedData[i][0] = parsedData[i][0].getTime(); | |
3239 | } | |
3240 | return parsedData; | |
3241 | } else { | |
3242 | // Some intelligent defaults for a numeric x-axis. | |
c39e1d93 | 3243 | /** @private (shut up, jsdoc!) */ |
48e614ac | 3244 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; |
5b9b2142 | 3245 | this.attrs_.axes.x.ticker = Dygraph.numericTicks; |
a716aff2 | 3246 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.numberAxisLabelFormatter; |
285a6bda DV |
3247 | return data; |
3248 | } | |
3249 | }; | |
3250 | ||
3251 | /** | |
79420a1e DV |
3252 | * Parses a DataTable object from gviz. |
3253 | * The data is expected to have a first column that is either a date or a | |
3254 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
3255 | * between this.xValueParser_ and the type of the first column, it will be | |
a685723c | 3256 | * fixed. Fills out rawData_. |
1bc88216 | 3257 | * @param {!google.visualization.DataTable} data See above. |
79420a1e DV |
3258 | * @private |
3259 | */ | |
285a6bda | 3260 | Dygraph.prototype.parseDataTable_ = function(data) { |
5829af3d | 3261 | var shortTextForAnnotationNum = function(num) { |
3262 | // converts [0-9]+ [A-Z][a-z]* | |
3263 | // example: 0=A, 1=B, 25=Z, 26=Aa, 27=Ab | |
3264 | // and continues like.. Ba Bb .. Za .. Zz..Aaa...Zzz Aaaa Zzzz | |
3265 | var shortText = String.fromCharCode(65 /* A */ + num % 26); | |
3266 | num = Math.floor(num / 26); | |
3267 | while ( num > 0 ) { | |
3268 | shortText = String.fromCharCode(65 /* A */ + (num - 1) % 26 ) + shortText.toLowerCase(); | |
3269 | num = Math.floor((num - 1) / 26); | |
3270 | } | |
3271 | return shortText; | |
42a9ebb8 | 3272 | }; |
5829af3d | 3273 | |
79420a1e DV |
3274 | var cols = data.getNumberOfColumns(); |
3275 | var rows = data.getNumberOfRows(); | |
3276 | ||
d955e223 | 3277 | var indepType = data.getColumnType(0); |
4440f6c8 | 3278 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda | 3279 | this.attrs_.xValueParser = Dygraph.dateParser; |
872a6a00 | 3280 | this.attrs_.axes.x.valueFormatter = Dygraph.dateValueFormatter; |
48e614ac | 3281 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; |
872a6a00 | 3282 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisLabelFormatter; |
33127159 | 3283 | } else if (indepType == 'number') { |
285a6bda | 3284 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
48e614ac | 3285 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; |
5b9b2142 | 3286 | this.attrs_.axes.x.ticker = Dygraph.numericTicks; |
48e614ac | 3287 | this.attrs_.axes.x.axisLabelFormatter = this.attrs_.axes.x.valueFormatter; |
285a6bda | 3288 | } else { |
464b5f50 DV |
3289 | Dygraph.error("only 'date', 'datetime' and 'number' types are supported " + |
3290 | "for column 1 of DataTable input (Got '" + indepType + "')"); | |
79420a1e DV |
3291 | return null; |
3292 | } | |
3293 | ||
a685723c DV |
3294 | // Array of the column indices which contain data (and not annotations). |
3295 | var colIdx = []; | |
3296 | var annotationCols = {}; // data index -> [annotation cols] | |
3297 | var hasAnnotations = false; | |
758a629f DV |
3298 | var i, j; |
3299 | for (i = 1; i < cols; i++) { | |
a685723c DV |
3300 | var type = data.getColumnType(i); |
3301 | if (type == 'number') { | |
3302 | colIdx.push(i); | |
b0963cdb | 3303 | } else if (type == 'string' && this.getBooleanOption('displayAnnotations')) { |
a685723c DV |
3304 | // This is OK -- it's an annotation column. |
3305 | var dataIdx = colIdx[colIdx.length - 1]; | |
3306 | if (!annotationCols.hasOwnProperty(dataIdx)) { | |
3307 | annotationCols[dataIdx] = [i]; | |
3308 | } else { | |
3309 | annotationCols[dataIdx].push(i); | |
3310 | } | |
3311 | hasAnnotations = true; | |
3312 | } else { | |
464b5f50 DV |
3313 | Dygraph.error("Only 'number' is supported as a dependent type with Gviz." + |
3314 | " 'string' is only supported if displayAnnotations is true"); | |
a685723c DV |
3315 | } |
3316 | } | |
3317 | ||
3318 | // Read column labels | |
3319 | // TODO(danvk): add support back for errorBars | |
3320 | var labels = [data.getColumnLabel(0)]; | |
758a629f | 3321 | for (i = 0; i < colIdx.length; i++) { |
a685723c | 3322 | labels.push(data.getColumnLabel(colIdx[i])); |
b0963cdb | 3323 | if (this.getBooleanOption("errorBars")) i += 1; |
a685723c DV |
3324 | } |
3325 | this.attrs_.labels = labels; | |
3326 | cols = labels.length; | |
3327 | ||
79420a1e | 3328 | var ret = []; |
987840a2 | 3329 | var outOfOrder = false; |
a685723c | 3330 | var annotations = []; |
758a629f | 3331 | for (i = 0; i < rows; i++) { |
79420a1e | 3332 | var row = []; |
debe4434 DV |
3333 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
3334 | data.getValue(i, 0) === null) { | |
464b5f50 DV |
3335 | Dygraph.warn("Ignoring row " + i + |
3336 | " of DataTable because of undefined or null first column."); | |
debe4434 DV |
3337 | continue; |
3338 | } | |
3339 | ||
c21d2c2d | 3340 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
3341 | row.push(data.getValue(i, 0).getTime()); |
3342 | } else { | |
3343 | row.push(data.getValue(i, 0)); | |
3344 | } | |
b0963cdb | 3345 | if (!this.getBooleanOption("errorBars")) { |
758a629f | 3346 | for (j = 0; j < colIdx.length; j++) { |
a685723c DV |
3347 | var col = colIdx[j]; |
3348 | row.push(data.getValue(i, col)); | |
3349 | if (hasAnnotations && | |
3350 | annotationCols.hasOwnProperty(col) && | |
758a629f | 3351 | data.getValue(i, annotationCols[col][0]) !== null) { |
a685723c DV |
3352 | var ann = {}; |
3353 | ann.series = data.getColumnLabel(col); | |
3354 | ann.xval = row[0]; | |
5829af3d | 3355 | ann.shortText = shortTextForAnnotationNum(annotations.length); |
a685723c DV |
3356 | ann.text = ''; |
3357 | for (var k = 0; k < annotationCols[col].length; k++) { | |
3358 | if (k) ann.text += "\n"; | |
3359 | ann.text += data.getValue(i, annotationCols[col][k]); | |
3360 | } | |
3361 | annotations.push(ann); | |
3362 | } | |
3e3f84e4 | 3363 | } |
92fd68d8 DV |
3364 | |
3365 | // Strip out infinities, which give dygraphs problems later on. | |
758a629f | 3366 | for (j = 0; j < row.length; j++) { |
92fd68d8 DV |
3367 | if (!isFinite(row[j])) row[j] = null; |
3368 | } | |
3e3f84e4 | 3369 | } else { |
758a629f | 3370 | for (j = 0; j < cols - 1; j++) { |
3e3f84e4 DV |
3371 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); |
3372 | } | |
79420a1e | 3373 | } |
987840a2 DV |
3374 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
3375 | outOfOrder = true; | |
3376 | } | |
243d96e8 | 3377 | ret.push(row); |
79420a1e | 3378 | } |
987840a2 DV |
3379 | |
3380 | if (outOfOrder) { | |
464b5f50 | 3381 | Dygraph.warn("DataTable is out of order; order it correctly to speed loading."); |
758a629f | 3382 | ret.sort(function(a,b) { return a[0] - b[0]; }); |
987840a2 | 3383 | } |
a685723c DV |
3384 | this.rawData_ = ret; |
3385 | ||
3386 | if (annotations.length > 0) { | |
3387 | this.setAnnotations(annotations, true); | |
3388 | } | |
0fa724fd | 3389 | this.attributes_.reparseSeries(); |
758a629f | 3390 | }; |
79420a1e | 3391 | |
629a09ae | 3392 | /** |
6a1aa64f DV |
3393 | * Get the CSV data. If it's in a function, call that function. If it's in a |
3394 | * file, do an XMLHttpRequest to get it. | |
3395 | * @private | |
3396 | */ | |
285a6bda | 3397 | Dygraph.prototype.start_ = function() { |
36d4fabf RK |
3398 | var data = this.file_; |
3399 | ||
3400 | // Functions can return references of all other types. | |
3401 | if (typeof data == 'function') { | |
3402 | data = data(); | |
3403 | } | |
3404 | ||
3405 | if (Dygraph.isArrayLike(data)) { | |
3406 | this.rawData_ = this.parseArray_(data); | |
26ca7938 | 3407 | this.predraw_(); |
36d4fabf RK |
3408 | } else if (typeof data == 'object' && |
3409 | typeof data.getColumnRange == 'function') { | |
79420a1e | 3410 | // must be a DataTable from gviz. |
36d4fabf | 3411 | this.parseDataTable_(data); |
26ca7938 | 3412 | this.predraw_(); |
36d4fabf | 3413 | } else if (typeof data == 'string') { |
285a6bda | 3414 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. |
e5763589 DV |
3415 | var line_delimiter = Dygraph.detectLineDelimiter(data); |
3416 | if (line_delimiter) { | |
36d4fabf | 3417 | this.loadedEvent_(data); |
285a6bda | 3418 | } else { |
efc5160f DV |
3419 | // REMOVE_FOR_IE |
3420 | var req; | |
3421 | if (window.XMLHttpRequest) { | |
3422 | // Firefox, Opera, IE7, and other browsers will use the native object | |
3423 | req = new XMLHttpRequest(); | |
3424 | } else { | |
3425 | // IE 5 and 6 will use the ActiveX control | |
3426 | req = new ActiveXObject("Microsoft.XMLHTTP"); | |
3427 | } | |
3428 | ||
285a6bda DV |
3429 | var caller = this; |
3430 | req.onreadystatechange = function () { | |
3431 | if (req.readyState == 4) { | |
758a629f DV |
3432 | if (req.status === 200 || // Normal http |
3433 | req.status === 0) { // Chrome w/ --allow-file-access-from-files | |
285a6bda DV |
3434 | caller.loadedEvent_(req.responseText); |
3435 | } | |
6a1aa64f | 3436 | } |
285a6bda | 3437 | }; |
6a1aa64f | 3438 | |
36d4fabf | 3439 | req.open("GET", data, true); |
285a6bda DV |
3440 | req.send(null); |
3441 | } | |
3442 | } else { | |
464b5f50 | 3443 | Dygraph.error("Unknown data format: " + (typeof data)); |
6a1aa64f DV |
3444 | } |
3445 | }; | |
3446 | ||
3447 | /** | |
3448 | * Changes various properties of the graph. These can include: | |
3449 | * <ul> | |
3450 | * <li>file: changes the source data for the graph</li> | |
3451 | * <li>errorBars: changes whether the data contains stddev</li> | |
3452 | * </ul> | |
dcb25130 | 3453 | * |
ccfcc169 DV |
3454 | * There's a huge variety of options that can be passed to this method. For a |
3455 | * full list, see http://dygraphs.com/options.html. | |
3456 | * | |
8ef9d44d DV |
3457 | * @param {Object} input_attrs The new properties and values |
3458 | * @param {boolean} block_redraw Usually the chart is redrawn after every | |
3459 | * call to updateOptions(). If you know better, you can pass true to | |
3460 | * explicitly block the redraw. This can be useful for chaining | |
3461 | * updateOptions() calls, avoiding the occasional infinite loop and | |
3462 | * preventing redraws when it's not necessary (e.g. when updating a | |
3463 | * callback). | |
6a1aa64f | 3464 | */ |
48e614ac | 3465 | Dygraph.prototype.updateOptions = function(input_attrs, block_redraw) { |
ccfcc169 DV |
3466 | if (typeof(block_redraw) == 'undefined') block_redraw = false; |
3467 | ||
48e614ac | 3468 | // mapLegacyOptions_ drops the "file" parameter as a convenience to us. |
758a629f | 3469 | var file = input_attrs.file; |
48e614ac DV |
3470 | var attrs = Dygraph.mapLegacyOptions_(input_attrs); |
3471 | ||
ccfcc169 | 3472 | // TODO(danvk): this is a mess. Move these options into attr_. |
c65f2303 | 3473 | if ('rollPeriod' in attrs) { |
6a1aa64f DV |
3474 | this.rollPeriod_ = attrs.rollPeriod; |
3475 | } | |
c65f2303 | 3476 | if ('dateWindow' in attrs) { |
6a1aa64f | 3477 | this.dateWindow_ = attrs.dateWindow; |
e5152598 | 3478 | if (!('isZoomedIgnoreProgrammaticZoom' in attrs)) { |
758a629f | 3479 | this.zoomed_x_ = (attrs.dateWindow !== null); |
81856f70 | 3480 | } |
b7e5862d | 3481 | } |
e5152598 | 3482 | if ('valueRange' in attrs && !('isZoomedIgnoreProgrammaticZoom' in attrs)) { |
758a629f | 3483 | this.zoomed_y_ = (attrs.valueRange !== null); |
6a1aa64f | 3484 | } |
450fe64b DV |
3485 | |
3486 | // TODO(danvk): validate per-series options. | |
46dde5f9 DV |
3487 | // Supported: |
3488 | // strokeWidth | |
3489 | // pointSize | |
3490 | // drawPoints | |
3491 | // highlightCircleSize | |
450fe64b | 3492 | |
9ca829f2 DV |
3493 | // Check if this set options will require new points. |
3494 | var requiresNewPoints = Dygraph.isPixelChangingOptionList(this.attr_("labels"), attrs); | |
3495 | ||
48e614ac | 3496 | Dygraph.updateDeep(this.user_attrs_, attrs); |
285a6bda | 3497 | |
b635457c RK |
3498 | this.attributes_.reparseSeries(); |
3499 | ||
48e614ac DV |
3500 | if (file) { |
3501 | this.file_ = file; | |
ccfcc169 | 3502 | if (!block_redraw) this.start_(); |
6a1aa64f | 3503 | } else { |
9ca829f2 DV |
3504 | if (!block_redraw) { |
3505 | if (requiresNewPoints) { | |
48e614ac | 3506 | this.predraw_(); |
9ca829f2 | 3507 | } else { |
e2c21500 | 3508 | this.renderGraph_(false); |
9ca829f2 DV |
3509 | } |
3510 | } | |
6a1aa64f DV |
3511 | } |
3512 | }; | |
3513 | ||
3514 | /** | |
48e614ac DV |
3515 | * Returns a copy of the options with deprecated names converted into current |
3516 | * names. Also drops the (potentially-large) 'file' attribute. If the caller is | |
3517 | * interested in that, they should save a copy before calling this. | |
3518 | * @private | |
3519 | */ | |
3520 | Dygraph.mapLegacyOptions_ = function(attrs) { | |
3521 | var my_attrs = {}; | |
3522 | for (var k in attrs) { | |
3523 | if (k == 'file') continue; | |
3524 | if (attrs.hasOwnProperty(k)) my_attrs[k] = attrs[k]; | |
3525 | } | |
3526 | ||
3527 | var set = function(axis, opt, value) { | |
3528 | if (!my_attrs.axes) my_attrs.axes = {}; | |
3529 | if (!my_attrs.axes[axis]) my_attrs.axes[axis] = {}; | |
3530 | my_attrs.axes[axis][opt] = value; | |
3531 | }; | |
3532 | var map = function(opt, axis, new_opt) { | |
3533 | if (typeof(attrs[opt]) != 'undefined') { | |
a9172eb1 RK |
3534 | Dygraph.warn("Option " + opt + " is deprecated. Use the " + |
3535 | new_opt + " option for the " + axis + " axis instead. " + | |
33a10307 RK |
3536 | "(e.g. { axes : { " + axis + " : { " + new_opt + " : ... } } } " + |
3537 | "(see http://dygraphs.com/per-axis.html for more information."); | |
48e614ac DV |
3538 | set(axis, new_opt, attrs[opt]); |
3539 | delete my_attrs[opt]; | |
3540 | } | |
3541 | }; | |
3542 | ||
3543 | // This maps, e.g., xValueFormater -> axes: { x: { valueFormatter: ... } } | |
3544 | map('xValueFormatter', 'x', 'valueFormatter'); | |
3545 | map('pixelsPerXLabel', 'x', 'pixelsPerLabel'); | |
3546 | map('xAxisLabelFormatter', 'x', 'axisLabelFormatter'); | |
3547 | map('xTicker', 'x', 'ticker'); | |
3548 | map('yValueFormatter', 'y', 'valueFormatter'); | |
3549 | map('pixelsPerYLabel', 'y', 'pixelsPerLabel'); | |
3550 | map('yAxisLabelFormatter', 'y', 'axisLabelFormatter'); | |
3551 | map('yTicker', 'y', 'ticker'); | |
7f6a7190 RK |
3552 | map('drawXGrid', 'x', 'drawGrid'); |
3553 | map('drawXAxis', 'x', 'drawAxis'); | |
3554 | map('drawYGrid', 'y', 'drawGrid'); | |
3555 | map('drawYAxis', 'y', 'drawAxis'); | |
48e614ac DV |
3556 | return my_attrs; |
3557 | }; | |
3558 | ||
3559 | /** | |
697e70b2 DV |
3560 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
3561 | * containing div (which has presumably changed size since the dygraph was | |
3562 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
3563 | * |
3564 | * This is far more efficient than destroying and re-instantiating a | |
3565 | * Dygraph, since it doesn't have to reparse the underlying data. | |
3566 | * | |
1bc88216 DV |
3567 | * @param {number} width Width (in pixels) |
3568 | * @param {number} height Height (in pixels) | |
697e70b2 DV |
3569 | */ |
3570 | Dygraph.prototype.resize = function(width, height) { | |
e8c7ef86 DV |
3571 | if (this.resize_lock) { |
3572 | return; | |
3573 | } | |
3574 | this.resize_lock = true; | |
3575 | ||
697e70b2 | 3576 | if ((width === null) != (height === null)) { |
464b5f50 DV |
3577 | Dygraph.warn("Dygraph.resize() should be called with zero parameters or " + |
3578 | "two non-NULL parameters. Pretending it was zero."); | |
697e70b2 DV |
3579 | width = height = null; |
3580 | } | |
3581 | ||
4b4d1a63 DV |
3582 | var old_width = this.width_; |
3583 | var old_height = this.height_; | |
b16e6369 | 3584 | |
697e70b2 DV |
3585 | if (width) { |
3586 | this.maindiv_.style.width = width + "px"; | |
3587 | this.maindiv_.style.height = height + "px"; | |
3588 | this.width_ = width; | |
3589 | this.height_ = height; | |
3590 | } else { | |
ccd9d7c2 PF |
3591 | this.width_ = this.maindiv_.clientWidth; |
3592 | this.height_ = this.maindiv_.clientHeight; | |
697e70b2 DV |
3593 | } |
3594 | ||
4b4d1a63 | 3595 | if (old_width != this.width_ || old_height != this.height_) { |
d82a3164 KW |
3596 | // Resizing a canvas erases it, even when the size doesn't change, so |
3597 | // any resize needs to be followed by a redraw. | |
3598 | this.resizeElements_(); | |
4b4d1a63 DV |
3599 | this.predraw_(); |
3600 | } | |
e8c7ef86 DV |
3601 | |
3602 | this.resize_lock = false; | |
697e70b2 DV |
3603 | }; |
3604 | ||
3605 | /** | |
6faebb69 | 3606 | * Adjusts the number of points in the rolling average. Updates the graph to |
6a1aa64f | 3607 | * reflect the new averaging period. |
1bc88216 | 3608 | * @param {number} length Number of points over which to average the data. |
6a1aa64f | 3609 | */ |
285a6bda | 3610 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f | 3611 | this.rollPeriod_ = length; |
26ca7938 | 3612 | this.predraw_(); |
6a1aa64f | 3613 | }; |
540d00f1 | 3614 | |
f8cfec73 | 3615 | /** |
1cf11047 DV |
3616 | * Returns a boolean array of visibility statuses. |
3617 | */ | |
3618 | Dygraph.prototype.visibility = function() { | |
3619 | // Do lazy-initialization, so that this happens after we know the number of | |
3620 | // data series. | |
b0963cdb | 3621 | if (!this.getOption("visibility")) { |
758a629f | 3622 | this.attrs_.visibility = []; |
1cf11047 | 3623 | } |
758a629f | 3624 | // TODO(danvk): it looks like this could go into an infinite loop w/ user_attrs. |
b0963cdb | 3625 | while (this.getOption("visibility").length < this.numColumns() - 1) { |
758a629f | 3626 | this.attrs_.visibility.push(true); |
1cf11047 | 3627 | } |
b0963cdb | 3628 | return this.getOption("visibility"); |
1cf11047 DV |
3629 | }; |
3630 | ||
3631 | /** | |
3632 | * Changes the visiblity of a series. | |
2aed8ad8 | 3633 | * |
7e64db42 RK |
3634 | * @param {number} num the series index |
3635 | * @param {boolean} value true or false, identifying the visibility. | |
1cf11047 DV |
3636 | */ |
3637 | Dygraph.prototype.setVisibility = function(num, value) { | |
3638 | var x = this.visibility(); | |
a6c109c1 | 3639 | if (num < 0 || num >= x.length) { |
464b5f50 | 3640 | Dygraph.warn("invalid series number in setVisibility: " + num); |
1cf11047 DV |
3641 | } else { |
3642 | x[num] = value; | |
26ca7938 | 3643 | this.predraw_(); |
1cf11047 DV |
3644 | } |
3645 | }; | |
3646 | ||
3647 | /** | |
0cb9bd91 DV |
3648 | * How large of an area will the dygraph render itself in? |
3649 | * This is used for testing. | |
3650 | * @return A {width: w, height: h} object. | |
3651 | * @private | |
3652 | */ | |
3653 | Dygraph.prototype.size = function() { | |
3654 | return { width: this.width_, height: this.height_ }; | |
3655 | }; | |
3656 | ||
3657 | /** | |
5c528fa2 | 3658 | * Update the list of annotations and redraw the chart. |
41ee764f DV |
3659 | * See dygraphs.com/annotations.html for more info on how to use annotations. |
3660 | * @param ann {Array} An array of annotation objects. | |
3661 | * @param suppressDraw {Boolean} Set to "true" to block chart redraw (optional). | |
5c528fa2 | 3662 | */ |
a685723c | 3663 | Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { |
3c51ab74 DV |
3664 | // Only add the annotation CSS rule once we know it will be used. |
3665 | Dygraph.addAnnotationRule(); | |
5c528fa2 | 3666 | this.annotations_ = ann; |
af6e4ad5 | 3667 | if (!this.layout_) { |
464b5f50 DV |
3668 | Dygraph.warn("Tried to setAnnotations before dygraph was ready. " + |
3669 | "Try setting them in a ready() block. See " + | |
3670 | "dygraphs.com/tests/annotation.html"); | |
af6e4ad5 DV |
3671 | return; |
3672 | } | |
3673 | ||
5c528fa2 | 3674 | this.layout_.setAnnotations(this.annotations_); |
a685723c | 3675 | if (!suppressDraw) { |
26ca7938 | 3676 | this.predraw_(); |
a685723c | 3677 | } |
5c528fa2 DV |
3678 | }; |
3679 | ||
3680 | /** | |
3681 | * Return the list of annotations. | |
3682 | */ | |
3683 | Dygraph.prototype.annotations = function() { | |
3684 | return this.annotations_; | |
3685 | }; | |
3686 | ||
46dde5f9 | 3687 | /** |
82c6fe4d KW |
3688 | * Get the list of label names for this graph. The first column is the |
3689 | * x-axis, so the data series names start at index 1. | |
4c10c8d2 RK |
3690 | * |
3691 | * Returns null when labels have not yet been defined. | |
82c6fe4d | 3692 | */ |
e2c21500 | 3693 | Dygraph.prototype.getLabels = function() { |
4c10c8d2 RK |
3694 | var labels = this.attr_("labels"); |
3695 | return labels ? labels.slice() : null; | |
82c6fe4d KW |
3696 | }; |
3697 | ||
3698 | /** | |
46dde5f9 DV |
3699 | * Get the index of a series (column) given its name. The first column is the |
3700 | * x-axis, so the data series start with index 1. | |
3701 | */ | |
3702 | Dygraph.prototype.indexFromSetName = function(name) { | |
82c6fe4d | 3703 | return this.setIndexByName_[name]; |
46dde5f9 DV |
3704 | }; |
3705 | ||
629a09ae | 3706 | /** |
5bcc58b4 DV |
3707 | * Trigger a callback when the dygraph has drawn itself and is ready to be |
3708 | * manipulated. This is primarily useful when dygraphs has to do an XHR for the | |
3709 | * data (i.e. a URL is passed as the data source) and the chart is drawn | |
3710 | * asynchronously. If the chart has already drawn, the callback will fire | |
3711 | * immediately. | |
3712 | * | |
3713 | * This is a good place to call setAnnotation(). | |
3714 | * | |
3715 | * @param {function(!Dygraph)} callback The callback to trigger when the chart | |
3716 | * is ready. | |
3717 | */ | |
3718 | Dygraph.prototype.ready = function(callback) { | |
3719 | if (this.is_initial_draw_) { | |
3720 | this.readyFns_.push(callback); | |
3721 | } else { | |
3722 | callback(this); | |
3723 | } | |
3724 | }; | |
3725 | ||
3726 | /** | |
629a09ae DV |
3727 | * @private |
3728 | * Adds a default style for the annotation CSS classes to the document. This is | |
3729 | * only executed when annotations are actually used. It is designed to only be | |
3730 | * called once -- all calls after the first will return immediately. | |
3731 | */ | |
5c528fa2 | 3732 | Dygraph.addAnnotationRule = function() { |
d38c6191 | 3733 | // TODO(danvk): move this function into plugins/annotations.js? |
5c528fa2 DV |
3734 | if (Dygraph.addedAnnotationCSS) return; |
3735 | ||
5c528fa2 DV |
3736 | var rule = "border: 1px solid black; " + |
3737 | "background-color: white; " + | |
3738 | "text-align: center;"; | |
22186871 DV |
3739 | |
3740 | var styleSheetElement = document.createElement("style"); | |
3741 | styleSheetElement.type = "text/css"; | |
3742 | document.getElementsByTagName("head")[0].appendChild(styleSheetElement); | |
3743 | ||
3744 | // Find the first style sheet that we can access. | |
3745 | // We may not add a rule to a style sheet from another domain for security | |
3746 | // reasons. This sometimes comes up when using gviz, since the Google gviz JS | |
3747 | // adds its own style sheets from google.com. | |
3748 | for (var i = 0; i < document.styleSheets.length; i++) { | |
3749 | if (document.styleSheets[i].disabled) continue; | |
3750 | var mysheet = document.styleSheets[i]; | |
3751 | try { | |
3752 | if (mysheet.insertRule) { // Firefox | |
3753 | var idx = mysheet.cssRules ? mysheet.cssRules.length : 0; | |
3754 | mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", idx); | |
3755 | } else if (mysheet.addRule) { // IE | |
3756 | mysheet.addRule(".dygraphDefaultAnnotation", rule); | |
3757 | } | |
3758 | Dygraph.addedAnnotationCSS = true; | |
3759 | return; | |
3760 | } catch(err) { | |
3761 | // Was likely a security exception. | |
3762 | } | |
5c528fa2 DV |
3763 | } |
3764 | ||
464b5f50 | 3765 | Dygraph.warn("Unable to add default annotation CSS rule; display may be off."); |
758a629f | 3766 | }; |