Commit | Line | Data |
---|---|---|
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 | ||
103fd879 DV |
46 | // For "production" code, this gets set to false by uglifyjs. |
47 | if (typeof(DEBUG) === 'undefined') DEBUG=true; | |
48 | ||
8887663f | 49 | var Dygraph = (function() { |
ac6a9c2b | 50 | /*global DygraphLayout:false, DygraphCanvasRenderer:false, DygraphOptions:false, G_vmlCanvasManager:false,ActiveXObject:false */ |
c0f54d4f DV |
51 | "use strict"; |
52 | ||
6a1aa64f | 53 | /** |
629a09ae DV |
54 | * Creates an interactive, zoomable chart. |
55 | * | |
56 | * @constructor | |
57 | * @param {div | String} div A div or the id of a div into which to construct | |
58 | * the chart. | |
59 | * @param {String | Function} file A file containing CSV data or a function | |
60 | * that returns this data. The most basic expected format for each line is | |
61 | * "YYYY/MM/DD,val1,val2,...". For more information, see | |
62 | * http://dygraphs.com/data.html. | |
6a1aa64f | 63 | * @param {Object} attrs Various other attributes, e.g. errorBars determines |
629a09ae DV |
64 | * whether the input data contains error ranges. For a complete list of |
65 | * options, see http://dygraphs.com/options.html. | |
6a1aa64f | 66 | */ |
86a3e64f | 67 | var Dygraph = function(div, data, opts, opt_fourth_param) { |
28eb1748 DV |
68 | // These have to go above the "Hack for IE" in __init__ since .ready() can be |
69 | // called as soon as the constructor returns. Once support for OldIE is | |
70 | // dropped, this can go down with the rest of the initializers. | |
71 | this.is_initial_draw_ = true; | |
72 | this.readyFns_ = []; | |
73 | ||
86a3e64f DV |
74 | if (opt_fourth_param !== undefined) { |
75 | // Old versions of dygraphs took in the series labels as a constructor | |
76 | // parameter. This doesn't make sense anymore, but it's easy to continue | |
77 | // to support this usage. | |
8a68db7d | 78 | console.warn("Using deprecated four-argument dygraph constructor"); |
86a3e64f DV |
79 | this.__old_init__(div, data, opts, opt_fourth_param); |
80 | } else { | |
81 | this.__init__(div, data, opts); | |
285a6bda | 82 | } |
6a1aa64f DV |
83 | }; |
84 | ||
285a6bda | 85 | Dygraph.NAME = "Dygraph"; |
e4b58391 | 86 | Dygraph.VERSION = "1.0.1"; |
285a6bda | 87 | Dygraph.__repr__ = function() { |
1bc88216 | 88 | return "[" + Dygraph.NAME + " " + Dygraph.VERSION + "]"; |
6a1aa64f | 89 | }; |
629a09ae DV |
90 | |
91 | /** | |
92 | * Returns information about the Dygraph class. | |
93 | */ | |
285a6bda | 94 | Dygraph.toString = function() { |
1bc88216 | 95 | return Dygraph.__repr__(); |
6a1aa64f DV |
96 | }; |
97 | ||
98 | // Various default values | |
285a6bda DV |
99 | Dygraph.DEFAULT_ROLL_PERIOD = 1; |
100 | Dygraph.DEFAULT_WIDTH = 480; | |
101 | Dygraph.DEFAULT_HEIGHT = 320; | |
6a1aa64f | 102 | |
a96b8ba3 A |
103 | // For max 60 Hz. animation: |
104 | Dygraph.ANIMATION_STEPS = 12; | |
b1a3b195 DV |
105 | Dygraph.ANIMATION_DURATION = 200; |
106 | ||
6108122b DV |
107 | // Label constants for the labelsKMB and labelsKMG2 options. |
108 | // (i.e. '100000' -> '100K') | |
2fd143d3 DV |
109 | Dygraph.KMB_LABELS = [ 'K', 'M', 'B', 'T', 'Q' ]; |
110 | Dygraph.KMG2_BIG_LABELS = [ 'k', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y' ]; | |
111 | Dygraph.KMG2_SMALL_LABELS = [ 'm', 'u', 'n', 'p', 'f', 'a', 'z', 'y' ]; | |
112 | ||
48e614ac DV |
113 | // These are defined before DEFAULT_ATTRS so that it can refer to them. |
114 | /** | |
115 | * @private | |
116 | * Return a string version of a number. This respects the digitsAfterDecimal | |
117 | * and maxNumberWidth options. | |
1bc88216 | 118 | * @param {number} x The number to be formatted |
48e614ac | 119 | * @param {Dygraph} opts An options view |
48e614ac | 120 | */ |
3ce712e6 | 121 | Dygraph.numberValueFormatter = function(x, opts) { |
48e614ac DV |
122 | var sigFigs = opts('sigFigs'); |
123 | ||
124 | if (sigFigs !== null) { | |
125 | // User has opted for a fixed number of significant figures. | |
126 | return Dygraph.floatFormat(x, sigFigs); | |
127 | } | |
128 | ||
129 | var digits = opts('digitsAfterDecimal'); | |
130 | var maxNumberWidth = opts('maxNumberWidth'); | |
131 | ||
2fd143d3 DV |
132 | var kmb = opts('labelsKMB'); |
133 | var kmg2 = opts('labelsKMG2'); | |
134 | ||
135 | var label; | |
136 | ||
48e614ac DV |
137 | // switch to scientific notation if we underflow or overflow fixed display. |
138 | if (x !== 0.0 && | |
139 | (Math.abs(x) >= Math.pow(10, maxNumberWidth) || | |
140 | Math.abs(x) < Math.pow(10, -digits))) { | |
2fd143d3 | 141 | label = x.toExponential(digits); |
48e614ac | 142 | } else { |
2fd143d3 | 143 | label = '' + Dygraph.round_(x, digits); |
48e614ac | 144 | } |
2fd143d3 DV |
145 | |
146 | if (kmb || kmg2) { | |
147 | var k; | |
148 | var k_labels = []; | |
149 | var m_labels = []; | |
150 | if (kmb) { | |
151 | k = 1000; | |
6108122b | 152 | k_labels = Dygraph.KMB_LABELS; |
2fd143d3 DV |
153 | } |
154 | if (kmg2) { | |
8a68db7d | 155 | if (kmb) console.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); |
2fd143d3 | 156 | k = 1024; |
6108122b DV |
157 | k_labels = Dygraph.KMG2_BIG_LABELS; |
158 | m_labels = Dygraph.KMG2_SMALL_LABELS; | |
2fd143d3 DV |
159 | } |
160 | ||
161 | var absx = Math.abs(x); | |
162 | var n = Dygraph.pow(k, k_labels.length); | |
163 | for (var j = k_labels.length - 1; j >= 0; j--, n /= k) { | |
164 | if (absx >= n) { | |
165 | label = Dygraph.round_(x / n, digits) + k_labels[j]; | |
166 | break; | |
167 | } | |
168 | } | |
169 | if (kmg2) { | |
170 | // TODO(danvk): clean up this logic. Why so different than kmb? | |
171 | var x_parts = String(x.toExponential()).split('e-'); | |
172 | if (x_parts.length === 2 && x_parts[1] >= 3 && x_parts[1] <= 24) { | |
173 | if (x_parts[1] % 3 > 0) { | |
174 | label = Dygraph.round_(x_parts[0] / | |
175 | Dygraph.pow(10, (x_parts[1] % 3)), | |
176 | digits); | |
177 | } else { | |
178 | label = Number(x_parts[0]).toFixed(2); | |
179 | } | |
180 | label += m_labels[Math.floor(x_parts[1] / 3) - 1]; | |
181 | } | |
182 | } | |
183 | } | |
184 | ||
185 | return label; | |
48e614ac DV |
186 | }; |
187 | ||
188 | /** | |
189 | * variant for use as an axisLabelFormatter. | |
190 | * @private | |
191 | */ | |
3ce712e6 DV |
192 | Dygraph.numberAxisLabelFormatter = function(x, granularity, opts) { |
193 | return Dygraph.numberValueFormatter(x, opts); | |
48e614ac DV |
194 | }; |
195 | ||
196 | /** | |
7b2dfd06 | 197 | * @type {!Array.<string>} |
48e614ac | 198 | * @private |
7b2dfd06 | 199 | * @constant |
48e614ac | 200 | */ |
7b2dfd06 | 201 | Dygraph.SHORT_MONTH_NAMES_ = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']; |
48e614ac | 202 | |
48e614ac DV |
203 | |
204 | /** | |
205 | * Convert a JS date to a string appropriate to display on an axis that | |
872a6a00 | 206 | * is displaying values at the stated granularity. This respects the |
8c0599e3 | 207 | * labelsUTC option. |
48e614ac | 208 | * @param {Date} date The date to format |
1bc88216 | 209 | * @param {number} granularity One of the Dygraph granularity constants |
872a6a00 DV |
210 | * @param {Dygraph} opts An options view |
211 | * @return {string} The date formatted as local time | |
48e614ac DV |
212 | * @private |
213 | */ | |
872a6a00 | 214 | Dygraph.dateAxisLabelFormatter = function(date, granularity, opts) { |
8c0599e3 | 215 | var utc = opts('labelsUTC'); |
f1ec8cf5 DV |
216 | var accessors = utc ? Dygraph.DateAccessorsUTC : Dygraph.DateAccessorsLocal; |
217 | ||
218 | var year = accessors.getFullYear(date), | |
219 | month = accessors.getMonth(date), | |
220 | day = accessors.getDate(date), | |
221 | hours = accessors.getHours(date), | |
222 | mins = accessors.getMinutes(date), | |
223 | secs = accessors.getSeconds(date), | |
224 | millis = accessors.getSeconds(date); | |
225 | ||
48e614ac | 226 | if (granularity >= Dygraph.DECADAL) { |
872a6a00 | 227 | return '' + year; |
48e614ac | 228 | } else if (granularity >= Dygraph.MONTHLY) { |
f1ec8cf5 | 229 | return Dygraph.SHORT_MONTH_NAMES_[month] + ' ' + year; |
48e614ac | 230 | } else { |
872a6a00 | 231 | var frac = hours * 3600 + mins * 60 + secs + 1e-3 * millis; |
758a629f | 232 | if (frac === 0 || granularity >= Dygraph.DAILY) { |
7b2dfd06 | 233 | // e.g. '21Jan' (%d%b) |
872a6a00 | 234 | return Dygraph.zeropad(day) + Dygraph.SHORT_MONTH_NAMES_[month]; |
48e614ac | 235 | } else { |
872a6a00 | 236 | return Dygraph.hmsString_(hours, mins, secs); |
48e614ac DV |
237 | } |
238 | } | |
239 | }; | |
ad9515f8 DV |
240 | // alias in case anyone is referencing the old method. |
241 | Dygraph.dateAxisFormatter = Dygraph.dateAxisLabelFormatter; | |
48e614ac | 242 | |
38e3d209 | 243 | /** |
872a6a00 | 244 | * Return a string version of a JS date for a value label. This respects the |
8c0599e3 | 245 | * labelsUTC option. |
872a6a00 DV |
246 | * @param {Date} date The date to be formatted |
247 | * @param {Dygraph} opts An options view | |
aaaf030e | 248 | * @private |
872a6a00 DV |
249 | */ |
250 | Dygraph.dateValueFormatter = function(d, opts) { | |
8c0599e3 | 251 | return Dygraph.dateString_(d, opts('labelsUTC')); |
872a6a00 | 252 | }; |
48e614ac | 253 | |
38e3d209 DV |
254 | /** |
255 | * Standard plotters. These may be used by clients. | |
256 | * Available plotters are: | |
257 | * - Dygraph.Plotters.linePlotter: draws central lines (most common) | |
258 | * - Dygraph.Plotters.errorPlotter: draws error bars | |
259 | * - Dygraph.Plotters.fillPlotter: draws fills under lines (used with fillGraph) | |
260 | * | |
261 | * By default, the plotter is [fillPlotter, errorPlotter, linePlotter]. | |
262 | * This causes all the lines to be drawn over all the fills/error bars. | |
263 | */ | |
264 | Dygraph.Plotters = DygraphCanvasRenderer._Plotters; | |
265 | ||
48e614ac | 266 | |
8e4a6af3 | 267 | // Default attribute values. |
285a6bda | 268 | Dygraph.DEFAULT_ATTRS = { |
a9fc39ab | 269 | highlightCircleSize: 3, |
857a6931 | 270 | highlightSeriesOpts: null, |
afdb20d8 | 271 | highlightSeriesBackgroundAlpha: 0.5, |
285a6bda | 272 | |
8e4a6af3 DV |
273 | labelsDivWidth: 250, |
274 | labelsDivStyles: { | |
275 | // TODO(danvk): move defaults from createStatusMessage_ here. | |
285a6bda DV |
276 | }, |
277 | labelsSeparateLines: false, | |
bcd3ebf0 | 278 | labelsShowZeroValues: true, |
285a6bda | 279 | labelsKMB: false, |
afefbcdb | 280 | labelsKMG2: false, |
d160cc3b | 281 | showLabelsOnHighlight: true, |
12e4c741 | 282 | |
2e1fcf1a DV |
283 | digitsAfterDecimal: 2, |
284 | maxNumberWidth: 6, | |
19589a3e | 285 | sigFigs: null, |
285a6bda DV |
286 | |
287 | strokeWidth: 1.0, | |
857a6931 KW |
288 | strokeBorderWidth: 0, |
289 | strokeBorderColor: "white", | |
8e4a6af3 | 290 | |
8846615a DV |
291 | axisTickSize: 3, |
292 | axisLabelFontSize: 14, | |
293 | xAxisLabelWidth: 50, | |
294 | yAxisLabelWidth: 50, | |
295 | rightGap: 5, | |
285a6bda DV |
296 | |
297 | showRoller: false, | |
285a6bda | 298 | xValueParser: Dygraph.dateParser, |
285a6bda | 299 | |
3d67f03b DV |
300 | delimiter: ',', |
301 | ||
285a6bda DV |
302 | sigma: 2.0, |
303 | errorBars: false, | |
304 | fractions: false, | |
305 | wilsonInterval: true, // only relevant if fractions is true | |
5954ef32 | 306 | customBars: false, |
43af96e7 NK |
307 | fillGraph: false, |
308 | fillAlpha: 0.15, | |
f032c51d | 309 | connectSeparatedPoints: false, |
43af96e7 NK |
310 | |
311 | stackedGraph: false, | |
30a5cfc6 | 312 | stackedGraphNaNFill: 'all', |
afdc483f NN |
313 | hideOverlayOnMouseOut: true, |
314 | ||
2fccd3dc DV |
315 | // TODO(danvk): support 'onmouseover' and 'never', and remove synonyms. |
316 | legend: 'onmouseover', // the only relevant value at the moment is 'always'. | |
317 | ||
00c281d4 | 318 | stepPlot: false, |
062ef401 | 319 | avoidMinZero: false, |
fa460473 KW |
320 | xRangePad: 0, |
321 | yRangePad: null, | |
f4b87da2 | 322 | drawAxesAtZero: false, |
062ef401 | 323 | |
ad1798c2 | 324 | // Sizes of the various chart labels. |
b4202b3d | 325 | titleHeight: 28, |
86cce9e8 DV |
326 | xLabelHeight: 18, |
327 | yLabelWidth: 18, | |
ad1798c2 | 328 | |
423f5ed3 DV |
329 | drawXAxis: true, |
330 | drawYAxis: true, | |
331 | axisLineColor: "black", | |
990d6a35 DV |
332 | axisLineWidth: 0.3, |
333 | gridLineWidth: 0.3, | |
334 | axisLabelColor: "black", | |
990d6a35 DV |
335 | axisLabelWidth: 50, |
336 | drawYGrid: true, | |
337 | drawXGrid: true, | |
338 | gridLineColor: "rgb(128,128,128)", | |
423f5ed3 | 339 | |
48e614ac | 340 | interactionModel: null, // will be set to Dygraph.Interaction.defaultModel |
b1a3b195 | 341 | animatedZooms: false, // (for now) |
48e614ac | 342 | |
ccd9d7c2 PF |
343 | // Range selector options |
344 | showRangeSelector: false, | |
345 | rangeSelectorHeight: 40, | |
346 | rangeSelectorPlotStrokeColor: "#808FAB", | |
347 | rangeSelectorPlotFillColor: "#A7B1C4", | |
0a0885d1 | 348 | showInRangeSelector: null, |
ccd9d7c2 | 349 | |
38e3d209 DV |
350 | // The ordering here ensures that central lines always appear above any |
351 | // fill bars/error bars. | |
352 | plotter: [ | |
353 | Dygraph.Plotters.fillPlotter, | |
354 | Dygraph.Plotters.errorPlotter, | |
355 | Dygraph.Plotters.linePlotter | |
356 | ], | |
357 | ||
eced46cf | 358 | plugins: [ ], |
d9fbba56 | 359 | |
48e614ac DV |
360 | // per-axis options |
361 | axes: { | |
362 | x: { | |
363 | pixelsPerLabel: 60, | |
872a6a00 DV |
364 | axisLabelFormatter: Dygraph.dateAxisLabelFormatter, |
365 | valueFormatter: Dygraph.dateValueFormatter, | |
9e906ae6 | 366 | drawGrid: true, |
7f6a7190 | 367 | drawAxis: true, |
9e906ae6 | 368 | independentTicks: true, |
48e614ac DV |
369 | ticker: null // will be set in dygraph-tickers.js |
370 | }, | |
371 | y: { | |
372 | pixelsPerLabel: 30, | |
373 | valueFormatter: Dygraph.numberValueFormatter, | |
374 | axisLabelFormatter: Dygraph.numberAxisLabelFormatter, | |
9e906ae6 | 375 | drawGrid: true, |
7f6a7190 | 376 | drawAxis: true, |
9e906ae6 | 377 | independentTicks: true, |
48e614ac DV |
378 | ticker: null // will be set in dygraph-tickers.js |
379 | }, | |
380 | y2: { | |
381 | pixelsPerLabel: 30, | |
382 | valueFormatter: Dygraph.numberValueFormatter, | |
383 | axisLabelFormatter: Dygraph.numberAxisLabelFormatter, | |
7f6a7190 | 384 | drawAxis: false, |
9e906ae6 DE |
385 | drawGrid: false, |
386 | independentTicks: false, | |
48e614ac DV |
387 | ticker: null // will be set in dygraph-tickers.js |
388 | } | |
389 | } | |
285a6bda DV |
390 | }; |
391 | ||
39b0e098 RK |
392 | // Directions for panning and zooming. Use bit operations when combined |
393 | // values are possible. | |
394 | Dygraph.HORIZONTAL = 1; | |
395 | Dygraph.VERTICAL = 2; | |
396 | ||
e2c21500 DV |
397 | // Installed plugins, in order of precedence (most-general to most-specific). |
398 | // Plugins are installed after they are defined, in plugins/install.js. | |
399 | Dygraph.PLUGINS = [ | |
400 | ]; | |
401 | ||
5c528fa2 DV |
402 | // Used for initializing annotation CSS rules only once. |
403 | Dygraph.addedAnnotationCSS = false; | |
404 | ||
285a6bda DV |
405 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { |
406 | // Labels is no longer a constructor parameter, since it's typically set | |
407 | // directly from the data source. It also conains a name for the x-axis, | |
408 | // which the previous constructor form did not. | |
758a629f | 409 | if (labels !== null) { |
285a6bda DV |
410 | var new_labels = ["Date"]; |
411 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); | |
fc80a396 | 412 | Dygraph.update(attrs, { 'labels': new_labels }); |
285a6bda DV |
413 | } |
414 | this.__init__(div, file, attrs); | |
8e4a6af3 DV |
415 | }; |
416 | ||
6a1aa64f | 417 | /** |
285a6bda | 418 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
7aedf6fe | 419 | * and context <canvas> inside of it. See the constructor for details. |
6a1aa64f | 420 | * on the parameters. |
12e4c741 | 421 | * @param {Element} div the Element to render the graph into. |
1bc88216 | 422 | * @param {string | Function} file Source data |
6a1aa64f DV |
423 | * @param {Object} attrs Miscellaneous other options |
424 | * @private | |
425 | */ | |
285a6bda | 426 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
a2c8fff4 DV |
427 | // Hack for IE: if we're using excanvas and the document hasn't finished |
428 | // loading yet (and hence may not have initialized whatever it needs to | |
429 | // initialize), then keep calling this routine periodically until it has. | |
430 | if (/MSIE/.test(navigator.userAgent) && !window.opera && | |
431 | typeof(G_vmlCanvasManager) != 'undefined' && | |
432 | document.readyState != 'complete') { | |
433 | var self = this; | |
758a629f | 434 | setTimeout(function() { self.__init__(div, file, attrs); }, 100); |
ccd9d7c2 | 435 | return; |
a2c8fff4 DV |
436 | } |
437 | ||
285a6bda | 438 | // Support two-argument constructor |
758a629f | 439 | if (attrs === null || attrs === undefined) { attrs = {}; } |
285a6bda | 440 | |
48e614ac DV |
441 | attrs = Dygraph.mapLegacyOptions_(attrs); |
442 | ||
8a870376 RK |
443 | if (typeof(div) == 'string') { |
444 | div = document.getElementById(div); | |
445 | } | |
446 | ||
48e614ac | 447 | if (!div) { |
8a68db7d | 448 | console.error("Constructing dygraph with a non-existent div!"); |
48e614ac DV |
449 | return; |
450 | } | |
451 | ||
920208fb PF |
452 | this.isUsingExcanvas_ = typeof(G_vmlCanvasManager) != 'undefined'; |
453 | ||
6a1aa64f | 454 | // Copy the important bits into the object |
32988383 | 455 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
6a1aa64f | 456 | this.maindiv_ = div; |
6a1aa64f | 457 | this.file_ = file; |
285a6bda | 458 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
6a1aa64f | 459 | this.previousVerticalX_ = -1; |
6a1aa64f | 460 | this.fractions_ = attrs.fractions || false; |
6a1aa64f | 461 | this.dateWindow_ = attrs.dateWindow || null; |
8b83c6cc | 462 | |
5c528fa2 | 463 | this.annotations_ = []; |
7aedf6fe | 464 | |
45f2c689 | 465 | // Zoomed indicators - These indicate when the graph has been zoomed and on what axis. |
57baab03 NN |
466 | this.zoomed_x_ = false; |
467 | this.zoomed_y_ = false; | |
45f2c689 | 468 | |
f7d6278e DV |
469 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
470 | // div, then only one will be drawn. | |
471 | div.innerHTML = ""; | |
472 | ||
0cb9bd91 DV |
473 | // For historical reasons, the 'width' and 'height' options trump all CSS |
474 | // rules _except_ for an explicit 'width' or 'height' on the div. | |
475 | // As an added convenience, if the div has zero height (like <div></div> does | |
476 | // without any styles), then we use a default height/width. | |
758a629f | 477 | if (div.style.width === '' && attrs.width) { |
0cb9bd91 | 478 | div.style.width = attrs.width + "px"; |
285a6bda | 479 | } |
758a629f | 480 | if (div.style.height === '' && attrs.height) { |
0cb9bd91 | 481 | div.style.height = attrs.height + "px"; |
32988383 | 482 | } |
758a629f | 483 | if (div.style.height === '' && div.clientHeight === 0) { |
0cb9bd91 | 484 | div.style.height = Dygraph.DEFAULT_HEIGHT + "px"; |
758a629f | 485 | if (div.style.width === '') { |
0cb9bd91 DV |
486 | div.style.width = Dygraph.DEFAULT_WIDTH + "px"; |
487 | } | |
c21d2c2d | 488 | } |
c28088bc KW |
489 | // These will be zero if the dygraph's div is hidden. In that case, |
490 | // use the user-specified attributes if present. If not, use zero | |
491 | // and assume the user will call resize to fix things later. | |
492 | this.width_ = div.clientWidth || attrs.width || 0; | |
493 | this.height_ = div.clientHeight || attrs.height || 0; | |
32988383 | 494 | |
344ba8c0 | 495 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
758a629f DV |
496 | if (attrs.stackedGraph) { |
497 | attrs.fillGraph = true; | |
43af96e7 NK |
498 | // TODO(nikhilk): Add any other stackedGraph checks here. |
499 | } | |
500 | ||
a9172eb1 RK |
501 | // DEPRECATION WARNING: All option processing should be moved from |
502 | // attrs_ and user_attrs_ to options_, which holds all this information. | |
503 | // | |
285a6bda DV |
504 | // Dygraphs has many options, some of which interact with one another. |
505 | // To keep track of everything, we maintain two sets of options: | |
506 | // | |
c21d2c2d | 507 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
508 | // this.attrs_ defaults, options derived from user_attrs_, data. |
509 | // | |
510 | // Options are then accessed this.attr_('attr'), which first looks at | |
511 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
512 | // defaults without overriding behavior that the user specifically asks for. | |
513 | this.user_attrs_ = {}; | |
fc80a396 | 514 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 515 | |
48e614ac | 516 | // This sequence ensures that Dygraph.DEFAULT_ATTRS is never modified. |
285a6bda | 517 | this.attrs_ = {}; |
48e614ac | 518 | Dygraph.updateDeep(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 519 | |
16269f6e | 520 | this.boundaryIds_ = []; |
82c6fe4d | 521 | this.setIndexByName_ = {}; |
857a6931 | 522 | this.datasetIndex_ = []; |
6a1aa64f | 523 | |
6a4587ac | 524 | this.registeredEvents_ = []; |
de8f284f | 525 | this.eventListeners_ = {}; |
6a4587ac | 526 | |
c1780ad0 RK |
527 | this.attributes_ = new DygraphOptions(this); |
528 | ||
6a1aa64f DV |
529 | // Create the containing DIV and other interactive elements |
530 | this.createInterface_(); | |
531 | ||
e2c21500 DV |
532 | // Activate plugins. |
533 | this.plugins_ = []; | |
d9fbba56 RK |
534 | var plugins = Dygraph.PLUGINS.concat(this.getOption('plugins')); |
535 | for (var i = 0; i < plugins.length; i++) { | |
6f5f0b2b | 536 | // the plugins option may contain either plugin classes or instances. |
835351fd DV |
537 | // Plugin instances contain an activate method. |
538 | var Plugin = plugins[i]; // either a constructor or an instance. | |
6f5f0b2b DV |
539 | var pluginInstance; |
540 | if (typeof(Plugin.activate) !== 'undefined') { | |
541 | pluginInstance = Plugin; | |
542 | } else { | |
543 | pluginInstance = new Plugin(); | |
544 | } | |
545 | ||
e2c21500 DV |
546 | var pluginDict = { |
547 | plugin: pluginInstance, | |
548 | events: {}, | |
549 | options: {}, | |
550 | pluginOptions: {} | |
551 | }; | |
552 | ||
6a4457b4 KW |
553 | var handlers = pluginInstance.activate(this); |
554 | for (var eventName in handlers) { | |
3ce712e6 | 555 | if (!handlers.hasOwnProperty(eventName)) continue; |
28aa77ac | 556 | // TODO(danvk): validate eventName. |
6a4457b4 KW |
557 | pluginDict.events[eventName] = handlers[eventName]; |
558 | } | |
e2c21500 DV |
559 | |
560 | this.plugins_.push(pluginDict); | |
561 | } | |
562 | ||
563 | // At this point, plugins can no longer register event handlers. | |
564 | // Construct a map from event -> ordered list of [callback, plugin]. | |
e2c21500 DV |
565 | for (var i = 0; i < this.plugins_.length; i++) { |
566 | var plugin_dict = this.plugins_[i]; | |
567 | for (var eventName in plugin_dict.events) { | |
568 | if (!plugin_dict.events.hasOwnProperty(eventName)) continue; | |
569 | var callback = plugin_dict.events[eventName]; | |
570 | ||
571 | var pair = [plugin_dict.plugin, callback]; | |
572 | if (!(eventName in this.eventListeners_)) { | |
573 | this.eventListeners_[eventName] = [pair]; | |
574 | } else { | |
575 | this.eventListeners_[eventName].push(pair); | |
576 | } | |
577 | } | |
578 | } | |
579 | ||
487f5523 PF |
580 | this.createDragInterface_(); |
581 | ||
738fc797 | 582 | this.start_(); |
6a1aa64f DV |
583 | }; |
584 | ||
dcb25130 | 585 | /** |
e2c21500 | 586 | * Triggers a cascade of events to the various plugins which are interested in them. |
6f5f0b2b DV |
587 | * Returns true if the "default behavior" should be prevented, i.e. if one |
588 | * of the event listeners called event.preventDefault(). | |
e2c21500 DV |
589 | * @private |
590 | */ | |
591 | Dygraph.prototype.cascadeEvents_ = function(name, extra_props) { | |
6f5f0b2b | 592 | if (!(name in this.eventListeners_)) return false; |
e2c21500 DV |
593 | |
594 | // QUESTION: can we use objects & prototypes to speed this up? | |
595 | var e = { | |
596 | dygraph: this, | |
597 | cancelable: false, | |
598 | defaultPrevented: false, | |
599 | preventDefault: function() { | |
600 | if (!e.cancelable) throw "Cannot call preventDefault on non-cancelable event."; | |
601 | e.defaultPrevented = true; | |
602 | }, | |
603 | propagationStopped: false, | |
604 | stopPropagation: function() { | |
5bd29cf4 | 605 | e.propagationStopped = true; |
e2c21500 DV |
606 | } |
607 | }; | |
608 | Dygraph.update(e, extra_props); | |
609 | ||
610 | var callback_plugin_pairs = this.eventListeners_[name]; | |
da1c187b KW |
611 | if (callback_plugin_pairs) { |
612 | for (var i = callback_plugin_pairs.length - 1; i >= 0; i--) { | |
613 | var plugin = callback_plugin_pairs[i][0]; | |
614 | var callback = callback_plugin_pairs[i][1]; | |
615 | callback.call(plugin, e); | |
616 | if (e.propagationStopped) break; | |
617 | } | |
e2c21500 DV |
618 | } |
619 | return e.defaultPrevented; | |
620 | }; | |
621 | ||
622 | /** | |
b1a96215 DV |
623 | * Fetch a plugin instance of a particular class. Only for testing. |
624 | * @private | |
625 | * @param {!Class} type The type of the plugin. | |
626 | * @return {Object} Instance of the plugin, or null if there is none. | |
627 | */ | |
628 | Dygraph.prototype.getPluginInstance_ = function(type) { | |
629 | for (var i = 0; i < this.plugins_.length; i++) { | |
630 | var p = this.plugins_[i]; | |
631 | if (p.plugin instanceof type) { | |
632 | return p.plugin; | |
633 | } | |
634 | } | |
635 | return null; | |
636 | }; | |
637 | ||
638 | /** | |
dcb25130 NN |
639 | * Returns the zoomed status of the chart for one or both axes. |
640 | * | |
641 | * Axis is an optional parameter. Can be set to 'x' or 'y'. | |
642 | * | |
643 | * The zoomed status for an axis is set whenever a user zooms using the mouse | |
42a9ebb8 DV |
644 | * or when the dateWindow or valueRange are updated (unless the |
645 | * isZoomedIgnoreProgrammaticZoom option is also specified). | |
dcb25130 | 646 | */ |
57baab03 | 647 | Dygraph.prototype.isZoomed = function(axis) { |
42a9ebb8 DV |
648 | if (axis === null || axis === undefined) { |
649 | return this.zoomed_x_ || this.zoomed_y_; | |
650 | } | |
758a629f DV |
651 | if (axis === 'x') return this.zoomed_x_; |
652 | if (axis === 'y') return this.zoomed_y_; | |
94ea5744 | 653 | throw "axis parameter is [" + axis + "] must be null, 'x' or 'y'."; |
57baab03 NN |
654 | }; |
655 | ||
629a09ae DV |
656 | /** |
657 | * Returns information about the Dygraph object, including its containing ID. | |
658 | */ | |
22bd1dfb RK |
659 | Dygraph.prototype.toString = function() { |
660 | var maindiv = this.maindiv_; | |
758a629f | 661 | var id = (maindiv && maindiv.id) ? maindiv.id : maindiv; |
22bd1dfb | 662 | return "[Dygraph " + id + "]"; |
758a629f | 663 | }; |
22bd1dfb | 664 | |
629a09ae DV |
665 | /** |
666 | * @private | |
667 | * Returns the value of an option. This may be set by the user (either in the | |
668 | * constructor or by calling updateOptions) or by dygraphs, and may be set to a | |
669 | * per-series value. | |
1bc88216 DV |
670 | * @param {string} name The name of the option, e.g. 'rollPeriod'. |
671 | * @param {string} [seriesName] The name of the series to which the option | |
629a09ae DV |
672 | * will be applied. If no per-series value of this option is available, then |
673 | * the global value is returned. This is optional. | |
674 | * @return { ... } The value of the option. | |
675 | */ | |
227b93cc | 676 | Dygraph.prototype.attr_ = function(name, seriesName) { |
103fd879 DV |
677 | if (DEBUG) { |
678 | if (typeof(Dygraph.OPTIONS_REFERENCE) === 'undefined') { | |
679 | console.error('Must include options reference JS for testing'); | |
680 | } else if (!Dygraph.OPTIONS_REFERENCE.hasOwnProperty(name)) { | |
681 | console.error('Dygraphs is using property ' + name + ', which has no ' + | |
682 | 'entry in the Dygraphs.OPTIONS_REFERENCE listing.'); | |
683 | // Only log this error once. | |
684 | Dygraph.OPTIONS_REFERENCE[name] = true; | |
685 | } | |
028ddf8a | 686 | } |
5daa462d | 687 | return seriesName ? this.attributes_.getForSeries(name, seriesName) : this.attributes_.get(name); |
285a6bda DV |
688 | }; |
689 | ||
6a1aa64f | 690 | /** |
e2c21500 DV |
691 | * Returns the current value for an option, as set in the constructor or via |
692 | * updateOptions. You may pass in an (optional) series name to get per-series | |
693 | * values for the option. | |
694 | * | |
695 | * All values returned by this method should be considered immutable. If you | |
696 | * modify them, there is no guarantee that the changes will be honored or that | |
697 | * dygraphs will remain in a consistent state. If you want to modify an option, | |
698 | * use updateOptions() instead. | |
699 | * | |
1bc88216 DV |
700 | * @param {string} name The name of the option (e.g. 'strokeWidth') |
701 | * @param {string=} opt_seriesName Series name to get per-series values. | |
702 | * @return {*} The value of the option. | |
e2c21500 DV |
703 | */ |
704 | Dygraph.prototype.getOption = function(name, opt_seriesName) { | |
705 | return this.attr_(name, opt_seriesName); | |
706 | }; | |
707 | ||
5266fc00 | 708 | /** |
1c420f2f | 709 | * Like getOption(), but specifically returns a number. |
5266fc00 DV |
710 | * This is a convenience function for working with the Closure Compiler. |
711 | * @param {string} name The name of the option (e.g. 'strokeWidth') | |
712 | * @param {string=} opt_seriesName Series name to get per-series values. | |
713 | * @return {number} The value of the option. | |
714 | * @private | |
715 | */ | |
716 | Dygraph.prototype.getNumericOption = function(name, opt_seriesName) { | |
717 | return /** @type{number} */(this.getOption(name, opt_seriesName)); | |
718 | }; | |
719 | ||
720 | /** | |
1c420f2f | 721 | * Like getOption(), but specifically returns a string. |
5266fc00 DV |
722 | * This is a convenience function for working with the Closure Compiler. |
723 | * @param {string} name The name of the option (e.g. 'strokeWidth') | |
724 | * @param {string=} opt_seriesName Series name to get per-series values. | |
725 | * @return {string} The value of the option. | |
726 | * @private | |
727 | */ | |
728 | Dygraph.prototype.getStringOption = function(name, opt_seriesName) { | |
729 | return /** @type{string} */(this.getOption(name, opt_seriesName)); | |
730 | }; | |
731 | ||
732 | /** | |
1c420f2f | 733 | * Like getOption(), but specifically returns a boolean. |
5266fc00 DV |
734 | * This is a convenience function for working with the Closure Compiler. |
735 | * @param {string} name The name of the option (e.g. 'strokeWidth') | |
736 | * @param {string=} opt_seriesName Series name to get per-series values. | |
737 | * @return {boolean} The value of the option. | |
738 | * @private | |
739 | */ | |
740 | Dygraph.prototype.getBooleanOption = function(name, opt_seriesName) { | |
741 | return /** @type{boolean} */(this.getOption(name, opt_seriesName)); | |
742 | }; | |
743 | ||
744 | /** | |
1c420f2f | 745 | * Like getOption(), but specifically returns a function. |
5266fc00 DV |
746 | * This is a convenience function for working with the Closure Compiler. |
747 | * @param {string} name The name of the option (e.g. 'strokeWidth') | |
748 | * @param {string=} opt_seriesName Series name to get per-series values. | |
749 | * @return {function(...)} The value of the option. | |
750 | * @private | |
751 | */ | |
752 | Dygraph.prototype.getFunctionOption = function(name, opt_seriesName) { | |
753 | return /** @type{function(...)} */(this.getOption(name, opt_seriesName)); | |
754 | }; | |
755 | ||
48dc3815 RK |
756 | Dygraph.prototype.getOptionForAxis = function(name, axis) { |
757 | return this.attributes_.getForAxis(name, axis); | |
83b0c192 DV |
758 | }; |
759 | ||
e2c21500 | 760 | /** |
48e614ac | 761 | * @private |
5266fc00 | 762 | * @param {string} axis The name of the axis (i.e. 'x', 'y' or 'y2') |
48e614ac DV |
763 | * @return { ... } A function mapping string -> option value |
764 | */ | |
765 | Dygraph.prototype.optionsViewForAxis_ = function(axis) { | |
766 | var self = this; | |
767 | return function(opt) { | |
758a629f | 768 | var axis_opts = self.user_attrs_.axes; |
2fd143d3 | 769 | if (axis_opts && axis_opts[axis] && axis_opts[axis].hasOwnProperty(opt)) { |
48e614ac DV |
770 | return axis_opts[axis][opt]; |
771 | } | |
5b9b2142 RK |
772 | |
773 | // I don't like that this is in a second spot. | |
774 | if (axis === 'x' && opt === 'logscale') { | |
775 | // return the default value. | |
776 | // TODO(konigsberg): pull the default from a global default. | |
777 | return false; | |
778 | } | |
779 | ||
48e614ac DV |
780 | // user-specified attributes always trump defaults, even if they're less |
781 | // specific. | |
782 | if (typeof(self.user_attrs_[opt]) != 'undefined') { | |
783 | return self.user_attrs_[opt]; | |
784 | } | |
785 | ||
758a629f | 786 | axis_opts = self.attrs_.axes; |
2fd143d3 | 787 | if (axis_opts && axis_opts[axis] && axis_opts[axis].hasOwnProperty(opt)) { |
48e614ac DV |
788 | return axis_opts[axis][opt]; |
789 | } | |
790 | // check old-style axis options | |
791 | // TODO(danvk): add a deprecation warning if either of these match. | |
792 | if (axis == 'y' && self.axes_[0].hasOwnProperty(opt)) { | |
793 | return self.axes_[0][opt]; | |
794 | } else if (axis == 'y2' && self.axes_[1].hasOwnProperty(opt)) { | |
795 | return self.axes_[1][opt]; | |
796 | } | |
797 | return self.attr_(opt); | |
798 | }; | |
799 | }; | |
800 | ||
801 | /** | |
6a1aa64f | 802 | * Returns the current rolling period, as set by the user or an option. |
1bc88216 | 803 | * @return {number} The number of points in the rolling window |
6a1aa64f | 804 | */ |
285a6bda | 805 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 806 | return this.rollPeriod_; |
76171648 DV |
807 | }; |
808 | ||
599fb4ad DV |
809 | /** |
810 | * Returns the currently-visible x-range. This can be affected by zooming, | |
811 | * panning or a call to updateOptions. | |
812 | * Returns a two-element array: [left, right]. | |
813 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
814 | */ | |
815 | Dygraph.prototype.xAxisRange = function() { | |
4cac8c7a RK |
816 | return this.dateWindow_ ? this.dateWindow_ : this.xAxisExtremes(); |
817 | }; | |
599fb4ad | 818 | |
4cac8c7a RK |
819 | /** |
820 | * Returns the lower- and upper-bound x-axis values of the | |
821 | * data set. | |
822 | */ | |
823 | Dygraph.prototype.xAxisExtremes = function() { | |
b0963cdb | 824 | var pad = this.getNumericOption('xRangePad') / this.plotter_.area.w; |
4bac38d8 | 825 | if (this.numRows() === 0) { |
fa460473 KW |
826 | return [0 - pad, 1 + pad]; |
827 | } | |
599fb4ad DV |
828 | var left = this.rawData_[0][0]; |
829 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
fa460473 KW |
830 | if (pad) { |
831 | // Must keep this in sync with dygraph-layout _evaluateLimits() | |
832 | var range = right - left; | |
833 | left -= range * pad; | |
834 | right += range * pad; | |
835 | } | |
599fb4ad DV |
836 | return [left, right]; |
837 | }; | |
838 | ||
3230c662 | 839 | /** |
d58ae307 DV |
840 | * Returns the currently-visible y-range for an axis. This can be affected by |
841 | * zooming, panning or a call to updateOptions. Axis indices are zero-based. If | |
842 | * called with no arguments, returns the range of the first axis. | |
3230c662 DV |
843 | * Returns a two-element array: [bottom, top]. |
844 | */ | |
d58ae307 | 845 | Dygraph.prototype.yAxisRange = function(idx) { |
d63e6799 | 846 | if (typeof(idx) == "undefined") idx = 0; |
d64b8fea RK |
847 | if (idx < 0 || idx >= this.axes_.length) { |
848 | return null; | |
849 | } | |
850 | var axis = this.axes_[idx]; | |
851 | return [ axis.computedValueRange[0], axis.computedValueRange[1] ]; | |
d58ae307 DV |
852 | }; |
853 | ||
854 | /** | |
855 | * Returns the currently-visible y-ranges for each axis. This can be affected by | |
856 | * zooming, panning, calls to updateOptions, etc. | |
857 | * Returns an array of [bottom, top] pairs, one for each y-axis. | |
858 | */ | |
859 | Dygraph.prototype.yAxisRanges = function() { | |
860 | var ret = []; | |
861 | for (var i = 0; i < this.axes_.length; i++) { | |
862 | ret.push(this.yAxisRange(i)); | |
863 | } | |
864 | return ret; | |
3230c662 DV |
865 | }; |
866 | ||
d58ae307 | 867 | // TODO(danvk): use these functions throughout dygraphs. |
3230c662 DV |
868 | /** |
869 | * Convert from data coordinates to canvas/div X/Y coordinates. | |
d58ae307 DV |
870 | * If specified, do this conversion for the coordinate system of a particular |
871 | * axis. Uses the first axis by default. | |
3230c662 | 872 | * Returns a two-element array: [X, Y] |
ff022deb | 873 | * |
0747928a | 874 | * Note: use toDomXCoord instead of toDomCoords(x, null) and use toDomYCoord |
ff022deb | 875 | * instead of toDomCoords(null, y, axis). |
3230c662 | 876 | */ |
d58ae307 | 877 | Dygraph.prototype.toDomCoords = function(x, y, axis) { |
ff022deb RK |
878 | return [ this.toDomXCoord(x), this.toDomYCoord(y, axis) ]; |
879 | }; | |
880 | ||
881 | /** | |
882 | * Convert from data x coordinates to canvas/div X coordinate. | |
883 | * If specified, do this conversion for the coordinate system of a particular | |
0037b2a4 RK |
884 | * axis. |
885 | * Returns a single value or null if x is null. | |
ff022deb RK |
886 | */ |
887 | Dygraph.prototype.toDomXCoord = function(x) { | |
758a629f | 888 | if (x === null) { |
ff022deb | 889 | return null; |
758a629f | 890 | } |
ff022deb | 891 | |
3230c662 | 892 | var area = this.plotter_.area; |
ff022deb RK |
893 | var xRange = this.xAxisRange(); |
894 | return area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; | |
758a629f | 895 | }; |
3230c662 | 896 | |
ff022deb RK |
897 | /** |
898 | * Convert from data x coordinates to canvas/div Y coordinate and optional | |
899 | * axis. Uses the first axis by default. | |
900 | * | |
901 | * returns a single value or null if y is null. | |
902 | */ | |
903 | Dygraph.prototype.toDomYCoord = function(y, axis) { | |
0747928a | 904 | var pct = this.toPercentYCoord(y, axis); |
3230c662 | 905 | |
758a629f | 906 | if (pct === null) { |
ff022deb RK |
907 | return null; |
908 | } | |
e4416fb9 | 909 | var area = this.plotter_.area; |
ff022deb | 910 | return area.y + pct * area.h; |
758a629f | 911 | }; |
3230c662 DV |
912 | |
913 | /** | |
914 | * Convert from canvas/div coords to data coordinates. | |
d58ae307 DV |
915 | * If specified, do this conversion for the coordinate system of a particular |
916 | * axis. Uses the first axis by default. | |
ff022deb RK |
917 | * Returns a two-element array: [X, Y]. |
918 | * | |
0747928a | 919 | * Note: use toDataXCoord instead of toDataCoords(x, null) and use toDataYCoord |
ff022deb | 920 | * instead of toDataCoords(null, y, axis). |
3230c662 | 921 | */ |
d58ae307 | 922 | Dygraph.prototype.toDataCoords = function(x, y, axis) { |
ff022deb RK |
923 | return [ this.toDataXCoord(x), this.toDataYCoord(y, axis) ]; |
924 | }; | |
925 | ||
926 | /** | |
927 | * Convert from canvas/div x coordinate to data coordinate. | |
928 | * | |
929 | * If x is null, this returns null. | |
930 | */ | |
931 | Dygraph.prototype.toDataXCoord = function(x) { | |
758a629f | 932 | if (x === null) { |
ff022deb | 933 | return null; |
3230c662 DV |
934 | } |
935 | ||
ff022deb RK |
936 | var area = this.plotter_.area; |
937 | var xRange = this.xAxisRange(); | |
5b9b2142 RK |
938 | |
939 | if (!this.attributes_.getForAxis("logscale", 'x')) { | |
940 | return xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); | |
941 | } else { | |
942 | // TODO: remove duplicate code? | |
943 | // Computing the inverse of toDomCoord. | |
944 | var pct = (x - area.x) / area.w; | |
945 | ||
946 | // Computing the inverse of toPercentXCoord. The function was arrived at with | |
947 | // the following steps: | |
948 | // | |
949 | // Original calcuation: | |
950 | // pct = (log(x) - log(xRange[0])) / (log(xRange[1]) - log(xRange[0]))); | |
951 | // | |
952 | // Multiply both sides by the right-side demoninator. | |
953 | // pct * (log(xRange[1] - log(xRange[0]))) = log(x) - log(xRange[0]) | |
954 | // | |
955 | // add log(xRange[0]) to both sides | |
956 | // log(xRange[0]) + (pct * (log(xRange[1]) - log(xRange[0])) = log(x); | |
957 | // | |
958 | // Swap both sides of the equation, | |
959 | // log(x) = log(xRange[0]) + (pct * (log(xRange[1]) - log(xRange[0])) | |
960 | // | |
961 | // Use both sides as the exponent in 10^exp and we're done. | |
962 | // x = 10 ^ (log(xRange[0]) + (pct * (log(xRange[1]) - log(xRange[0]))) | |
963 | var logr0 = Dygraph.log10(xRange[0]); | |
964 | var logr1 = Dygraph.log10(xRange[1]); | |
965 | var exponent = logr0 + (pct * (logr1 - logr0)); | |
966 | var value = Math.pow(Dygraph.LOG_SCALE, exponent); | |
967 | return value; | |
968 | } | |
ff022deb RK |
969 | }; |
970 | ||
971 | /** | |
972 | * Convert from canvas/div y coord to value. | |
973 | * | |
974 | * If y is null, this returns null. | |
975 | * if axis is null, this uses the first axis. | |
976 | */ | |
977 | Dygraph.prototype.toDataYCoord = function(y, axis) { | |
758a629f | 978 | if (y === null) { |
ff022deb | 979 | return null; |
3230c662 DV |
980 | } |
981 | ||
ff022deb RK |
982 | var area = this.plotter_.area; |
983 | var yRange = this.yAxisRange(axis); | |
984 | ||
b70247dc | 985 | if (typeof(axis) == "undefined") axis = 0; |
1f8c95d8 | 986 | if (!this.attributes_.getForAxis("logscale", axis)) { |
d9816e62 | 987 | return yRange[0] + (area.y + area.h - y) / area.h * (yRange[1] - yRange[0]); |
ff022deb RK |
988 | } else { |
989 | // Computing the inverse of toDomCoord. | |
758a629f | 990 | var pct = (y - area.y) / area.h; |
ff022deb RK |
991 | |
992 | // Computing the inverse of toPercentYCoord. The function was arrived at with | |
993 | // the following steps: | |
994 | // | |
995 | // Original calcuation: | |
5b9b2142 | 996 | // pct = (log(yRange[1]) - log(y)) / (log(yRange[1]) - log(yRange[0])); |
ff022deb | 997 | // |
5b9b2142 RK |
998 | // Multiply both sides by the right-side demoninator. |
999 | // pct * (log(yRange[1]) - log(yRange[0])) = log(yRange[1]) - log(y); | |
ff022deb | 1000 | // |
5b9b2142 RK |
1001 | // subtract log(yRange[1]) from both sides. |
1002 | // (pct * (log(yRange[1]) - log(yRange[0]))) - log(yRange[1]) = -log(y); | |
ff022deb | 1003 | // |
5b9b2142 RK |
1004 | // and multiply both sides by -1. |
1005 | // log(yRange[1]) - (pct * (logr1 - log(yRange[0])) = log(y); | |
1006 | // | |
1007 | // Swap both sides of the equation, | |
1008 | // log(y) = log(yRange[1]) - (pct * (log(yRange[1]) - log(yRange[0]))); | |
1009 | // | |
1010 | // Use both sides as the exponent in 10^exp and we're done. | |
1011 | // y = 10 ^ (log(yRange[1]) - (pct * (log(yRange[1]) - log(yRange[0])))); | |
1012 | var logr0 = Dygraph.log10(yRange[0]); | |
d59b6f34 | 1013 | var logr1 = Dygraph.log10(yRange[1]); |
5b9b2142 | 1014 | var exponent = logr1 - (pct * (logr1 - logr0)); |
d59b6f34 | 1015 | var value = Math.pow(Dygraph.LOG_SCALE, exponent); |
ff022deb RK |
1016 | return value; |
1017 | } | |
3230c662 DV |
1018 | }; |
1019 | ||
e99fde05 | 1020 | /** |
ff022deb | 1021 | * Converts a y for an axis to a percentage from the top to the |
4cac8c7a | 1022 | * bottom of the drawing area. |
ff022deb RK |
1023 | * |
1024 | * If the coordinate represents a value visible on the canvas, then | |
1025 | * the value will be between 0 and 1, where 0 is the top of the canvas. | |
1026 | * However, this method will return values outside the range, as | |
1027 | * values can fall outside the canvas. | |
1028 | * | |
1029 | * If y is null, this returns null. | |
1030 | * if axis is null, this uses the first axis. | |
629a09ae | 1031 | * |
1bc88216 DV |
1032 | * @param {number} y The data y-coordinate. |
1033 | * @param {number} [axis] The axis number on which the data coordinate lives. | |
1034 | * @return {number} A fraction in [0, 1] where 0 = the top edge. | |
ff022deb RK |
1035 | */ |
1036 | Dygraph.prototype.toPercentYCoord = function(y, axis) { | |
758a629f | 1037 | if (y === null) { |
ff022deb RK |
1038 | return null; |
1039 | } | |
7d0e7a0d | 1040 | if (typeof(axis) == "undefined") axis = 0; |
ff022deb | 1041 | |
ff022deb RK |
1042 | var yRange = this.yAxisRange(axis); |
1043 | ||
1044 | var pct; | |
1761e6ed | 1045 | var logscale = this.attributes_.getForAxis("logscale", axis); |
5b9b2142 RK |
1046 | if (logscale) { |
1047 | var logr0 = Dygraph.log10(yRange[0]); | |
1048 | var logr1 = Dygraph.log10(yRange[1]); | |
1049 | pct = (logr1 - Dygraph.log10(y)) / (logr1 - logr0); | |
1050 | } else { | |
4cac8c7a RK |
1051 | // yRange[1] - y is unit distance from the bottom. |
1052 | // yRange[1] - yRange[0] is the scale of the range. | |
ff022deb RK |
1053 | // (yRange[1] - y) / (yRange[1] - yRange[0]) is the % from the bottom. |
1054 | pct = (yRange[1] - y) / (yRange[1] - yRange[0]); | |
ff022deb RK |
1055 | } |
1056 | return pct; | |
758a629f | 1057 | }; |
ff022deb RK |
1058 | |
1059 | /** | |
4cac8c7a RK |
1060 | * Converts an x value to a percentage from the left to the right of |
1061 | * the drawing area. | |
1062 | * | |
1063 | * If the coordinate represents a value visible on the canvas, then | |
1064 | * the value will be between 0 and 1, where 0 is the left of the canvas. | |
1065 | * However, this method will return values outside the range, as | |
1066 | * values can fall outside the canvas. | |
1067 | * | |
1068 | * If x is null, this returns null. | |
1bc88216 DV |
1069 | * @param {number} x The data x-coordinate. |
1070 | * @return {number} A fraction in [0, 1] where 0 = the left edge. | |
4cac8c7a RK |
1071 | */ |
1072 | Dygraph.prototype.toPercentXCoord = function(x) { | |
758a629f | 1073 | if (x === null) { |
4cac8c7a RK |
1074 | return null; |
1075 | } | |
1076 | ||
4cac8c7a | 1077 | var xRange = this.xAxisRange(); |
5b9b2142 RK |
1078 | var pct; |
1079 | var logscale = this.attributes_.getForAxis("logscale", 'x') ; | |
46fd9089 | 1080 | if (logscale === true) { // logscale can be null so we test for true explicitly. |
5b9b2142 RK |
1081 | var logr0 = Dygraph.log10(xRange[0]); |
1082 | var logr1 = Dygraph.log10(xRange[1]); | |
1083 | pct = (Dygraph.log10(x) - logr0) / (logr1 - logr0); | |
1084 | } else { | |
1085 | // x - xRange[0] is unit distance from the left. | |
1086 | // xRange[1] - xRange[0] is the scale of the range. | |
1087 | // The full expression below is the % from the left. | |
1088 | pct = (x - xRange[0]) / (xRange[1] - xRange[0]); | |
1089 | } | |
1090 | return pct; | |
629a09ae | 1091 | }; |
4cac8c7a RK |
1092 | |
1093 | /** | |
e99fde05 | 1094 | * Returns the number of columns (including the independent variable). |
1bc88216 | 1095 | * @return {number} The number of columns. |
e99fde05 DV |
1096 | */ |
1097 | Dygraph.prototype.numColumns = function() { | |
fa460473 | 1098 | if (!this.rawData_) return 0; |
395e98a3 | 1099 | return this.rawData_[0] ? this.rawData_[0].length : this.attr_("labels").length; |
e99fde05 DV |
1100 | }; |
1101 | ||
1102 | /** | |
1103 | * Returns the number of rows (excluding any header/label row). | |
1bc88216 | 1104 | * @return {number} The number of rows, less any header. |
e99fde05 DV |
1105 | */ |
1106 | Dygraph.prototype.numRows = function() { | |
fa460473 | 1107 | if (!this.rawData_) return 0; |
e99fde05 DV |
1108 | return this.rawData_.length; |
1109 | }; | |
1110 | ||
1111 | /** | |
1112 | * Returns the value in the given row and column. If the row and column exceed | |
1113 | * the bounds on the data, returns null. Also returns null if the value is | |
1114 | * missing. | |
1bc88216 DV |
1115 | * @param {number} row The row number of the data (0-based). Row 0 is the |
1116 | * first row of data, not a header row. | |
1117 | * @param {number} col The column number of the data (0-based) | |
1118 | * @return {number} The value in the specified cell or null if the row/col | |
1119 | * were out of range. | |
e99fde05 DV |
1120 | */ |
1121 | Dygraph.prototype.getValue = function(row, col) { | |
1122 | if (row < 0 || row > this.rawData_.length) return null; | |
1123 | if (col < 0 || col > this.rawData_[row].length) return null; | |
1124 | ||
1125 | return this.rawData_[row][col]; | |
1126 | }; | |
1127 | ||
629a09ae | 1128 | /** |
285a6bda | 1129 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 1130 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 1131 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
1132 | * @private |
1133 | */ | |
285a6bda | 1134 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
1135 | // Create the all-enclosing graph div |
1136 | var enclosing = this.maindiv_; | |
1137 | ||
b0c3b730 | 1138 | this.graphDiv = document.createElement("div"); |
aeca29ac | 1139 | |
e0629007 DV |
1140 | // TODO(danvk): any other styles that are useful to set here? |
1141 | this.graphDiv.style.textAlign = 'left'; // This is a CSS "reset" | |
cb8bb6a6 | 1142 | this.graphDiv.style.position = 'relative'; |
b0c3b730 DV |
1143 | enclosing.appendChild(this.graphDiv); |
1144 | ||
1145 | // Create the canvas for interactive parts of the chart. | |
f8cfec73 | 1146 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 | 1147 | this.canvas_.style.position = "absolute"; |
aeca29ac | 1148 | |
c28088bc KW |
1149 | // ... and for static parts of the chart. |
1150 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); | |
1151 | ||
2cf95fff | 1152 | this.canvas_ctx_ = Dygraph.getContext(this.canvas_); |
2cf95fff | 1153 | this.hidden_ctx_ = Dygraph.getContext(this.hidden_); |
76171648 | 1154 | |
37819481 PH |
1155 | this.resizeElements_(); |
1156 | ||
eb7bf005 EC |
1157 | // The interactive parts of the graph are drawn on top of the chart. |
1158 | this.graphDiv.appendChild(this.hidden_); | |
1159 | this.graphDiv.appendChild(this.canvas_); | |
920208fb PF |
1160 | this.mouseEventElement_ = this.createMouseEventElement_(); |
1161 | ||
1162 | // Create the grapher | |
1163 | this.layout_ = new DygraphLayout(this); | |
1164 | ||
76171648 | 1165 | var dygraph = this; |
de8f284f | 1166 | |
9fd9bbbb | 1167 | this.mouseMoveHandler_ = function(e) { |
1168 | dygraph.mouseMove_(e); | |
1169 | }; | |
de8f284f | 1170 | |
9fd9bbbb | 1171 | this.mouseOutHandler_ = function(e) { |
def24194 DV |
1172 | // The mouse has left the chart if: |
1173 | // 1. e.target is inside the chart | |
1174 | // 2. e.relatedTarget is outside the chart | |
1175 | var target = e.target || e.fromElement; | |
1176 | var relatedTarget = e.relatedTarget || e.toElement; | |
bcb545f4 LB |
1177 | if (Dygraph.isNodeContainedBy(target, dygraph.graphDiv) && |
1178 | !Dygraph.isNodeContainedBy(relatedTarget, dygraph.graphDiv)) { | |
def24194 DV |
1179 | dygraph.mouseOut_(e); |
1180 | } | |
9fd9bbbb | 1181 | }; |
1182 | ||
aeca29ac RK |
1183 | this.addAndTrackEvent(window, 'mouseout', this.mouseOutHandler_); |
1184 | this.addAndTrackEvent(this.mouseEventElement_, 'mousemove', this.mouseMoveHandler_); | |
697e70b2 | 1185 | |
9fd9bbbb | 1186 | // Don't recreate and register the resize handler on subsequent calls. |
1187 | // This happens when the graph is resized. | |
1188 | if (!this.resizeHandler_) { | |
e0b3afad RK |
1189 | this.resizeHandler_ = function(e) { |
1190 | dygraph.resize(); | |
1191 | }; | |
1c6b239c | 1192 | |
e0b3afad RK |
1193 | // Update when the window is resized. |
1194 | // TODO(danvk): drop frames depending on complexity of the chart. | |
aeca29ac | 1195 | this.addAndTrackEvent(window, 'resize', this.resizeHandler_); |
e0b3afad | 1196 | } |
4cfcc38c DV |
1197 | }; |
1198 | ||
aeca29ac RK |
1199 | Dygraph.prototype.resizeElements_ = function() { |
1200 | this.graphDiv.style.width = this.width_ + "px"; | |
1201 | this.graphDiv.style.height = this.height_ + "px"; | |
37819481 PH |
1202 | |
1203 | var canvasScale = Dygraph.getContextPixelRatio(this.canvas_ctx_); | |
1204 | this.canvas_.width = this.width_ * canvasScale; | |
1205 | this.canvas_.height = this.height_ * canvasScale; | |
aeca29ac RK |
1206 | this.canvas_.style.width = this.width_ + "px"; // for IE |
1207 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
37819481 PH |
1208 | if (canvasScale !== 1) { |
1209 | this.canvas_ctx_.scale(canvasScale, canvasScale); | |
1210 | } | |
1211 | ||
1212 | var hiddenScale = Dygraph.getContextPixelRatio(this.hidden_ctx_); | |
1213 | this.hidden_.width = this.width_ * hiddenScale; | |
1214 | this.hidden_.height = this.height_ * hiddenScale; | |
c28088bc KW |
1215 | this.hidden_.style.width = this.width_ + "px"; // for IE |
1216 | this.hidden_.style.height = this.height_ + "px"; // for IE | |
37819481 PH |
1217 | if (hiddenScale !== 1) { |
1218 | this.hidden_ctx_.scale(hiddenScale, hiddenScale); | |
1219 | } | |
f914bed1 | 1220 | }; |
aeca29ac | 1221 | |
4cfcc38c DV |
1222 | /** |
1223 | * Detach DOM elements in the dygraph and null out all data references. | |
1224 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
1225 | * usage. See, e.g., the tests/perf.html example. | |
1226 | */ | |
1227 | Dygraph.prototype.destroy = function() { | |
aeca29ac RK |
1228 | this.canvas_ctx_.restore(); |
1229 | this.hidden_ctx_.restore(); | |
1230 | ||
92c5f414 DV |
1231 | // Destroy any plugins, in the reverse order that they were registered. |
1232 | for (var i = this.plugins_.length - 1; i >= 0; i--) { | |
1233 | var p = this.plugins_.pop(); | |
1234 | if (p.plugin.destroy) p.plugin.destroy(); | |
1235 | } | |
1236 | ||
4cfcc38c DV |
1237 | var removeRecursive = function(node) { |
1238 | while (node.hasChildNodes()) { | |
1239 | removeRecursive(node.firstChild); | |
1240 | node.removeChild(node.firstChild); | |
1241 | } | |
1242 | }; | |
de8f284f | 1243 | |
aeca29ac | 1244 | this.removeTrackedEvents_(); |
6a4587ac RK |
1245 | |
1246 | // remove mouse event handlers (This may not be necessary anymore) | |
def24194 | 1247 | Dygraph.removeEvent(window, 'mouseout', this.mouseOutHandler_); |
7d6df48d | 1248 | Dygraph.removeEvent(this.mouseEventElement_, 'mousemove', this.mouseMoveHandler_); |
7d6df48d RK |
1249 | |
1250 | // remove window handlers | |
92c5f414 | 1251 | Dygraph.removeEvent(window,'resize', this.resizeHandler_); |
7d6df48d RK |
1252 | this.resizeHandler_ = null; |
1253 | ||
4cfcc38c DV |
1254 | removeRecursive(this.maindiv_); |
1255 | ||
1256 | var nullOut = function(obj) { | |
1257 | for (var n in obj) { | |
1258 | if (typeof(obj[n]) === 'object') { | |
1259 | obj[n] = null; | |
1260 | } | |
1261 | } | |
1262 | }; | |
4cfcc38c DV |
1263 | // These may not all be necessary, but it can't hurt... |
1264 | nullOut(this.layout_); | |
1265 | nullOut(this.plotter_); | |
1266 | nullOut(this); | |
1267 | }; | |
6a1aa64f DV |
1268 | |
1269 | /** | |
629a09ae DV |
1270 | * Creates the canvas on which the chart will be drawn. Only the Renderer ever |
1271 | * draws on this particular canvas. All Dygraph work (i.e. drawing hover dots | |
1272 | * or the zoom rectangles) is done on this.canvas_. | |
8846615a | 1273 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
1274 | * @return {Object} The newly-created canvas |
1275 | * @private | |
1276 | */ | |
285a6bda | 1277 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 | 1278 | var h = Dygraph.createCanvas(); |
6a1aa64f | 1279 | h.style.position = "absolute"; |
9ac5e4ae DV |
1280 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
1281 | // some extra area to make it easier to zoom in on the far left and far | |
1282 | // right. h needs to be precisely the plot area, so that clipping occurs. | |
6a1aa64f DV |
1283 | h.style.top = canvas.style.top; |
1284 | h.style.left = canvas.style.left; | |
1285 | h.width = this.width_; | |
1286 | h.height = this.height_; | |
f8cfec73 DV |
1287 | h.style.width = this.width_ + "px"; // for IE |
1288 | h.style.height = this.height_ + "px"; // for IE | |
6a1aa64f DV |
1289 | return h; |
1290 | }; | |
1291 | ||
629a09ae | 1292 | /** |
920208fb PF |
1293 | * Creates an overlay element used to handle mouse events. |
1294 | * @return {Object} The mouse event element. | |
1295 | * @private | |
1296 | */ | |
1297 | Dygraph.prototype.createMouseEventElement_ = function() { | |
1298 | if (this.isUsingExcanvas_) { | |
1299 | var elem = document.createElement("div"); | |
1300 | elem.style.position = 'absolute'; | |
1301 | elem.style.backgroundColor = 'white'; | |
1302 | elem.style.filter = 'alpha(opacity=0)'; | |
1303 | elem.style.width = this.width_ + "px"; | |
1304 | elem.style.height = this.height_ + "px"; | |
1305 | this.graphDiv.appendChild(elem); | |
1306 | return elem; | |
1307 | } else { | |
1308 | return this.canvas_; | |
1309 | } | |
1310 | }; | |
1311 | ||
1312 | /** | |
6a1aa64f DV |
1313 | * Generate a set of distinct colors for the data series. This is done with a |
1314 | * color wheel. Saturation/Value are customizable, and the hue is | |
1315 | * equally-spaced around the color wheel. If a custom set of colors is | |
1316 | * specified, that is used instead. | |
6a1aa64f DV |
1317 | * @private |
1318 | */ | |
285a6bda | 1319 | Dygraph.prototype.setColors_ = function() { |
ee53deb9 DV |
1320 | var labels = this.getLabels(); |
1321 | var num = labels.length - 1; | |
6a1aa64f | 1322 | this.colors_ = []; |
ee53deb9 | 1323 | this.colorsMap_ = {}; |
48423521 RK |
1324 | |
1325 | // These are used for when no custom colors are specified. | |
b0963cdb DV |
1326 | var sat = this.getNumericOption('colorSaturation') || 1.0; |
1327 | var val = this.getNumericOption('colorValue') || 0.5; | |
48423521 RK |
1328 | var half = Math.ceil(num / 2); |
1329 | ||
b0963cdb | 1330 | var colors = this.getOption('colors'); |
48423521 RK |
1331 | var visibility = this.visibility(); |
1332 | for (var i = 0; i < num; i++) { | |
1333 | if (!visibility[i]) { | |
1334 | continue; | |
1335 | } | |
1336 | var label = labels[i + 1]; | |
1337 | var colorStr = this.attributes_.getForSeries('color', label); | |
1338 | if (!colorStr) { | |
1339 | if (colors) { | |
1340 | colorStr = colors[i % colors.length]; | |
1341 | } else { | |
1342 | // alternate colors for high contrast. | |
1343 | var idx = i % 2 ? (half + (i + 1)/ 2) : Math.ceil((i + 1) / 2); | |
1344 | var hue = (1.0 * idx / (1 + num)); | |
1345 | colorStr = Dygraph.hsvToRGB(hue, sat, val); | |
1346 | } | |
1347 | } | |
1348 | this.colors_.push(colorStr); | |
1349 | this.colorsMap_[label] = colorStr; | |
1350 | } | |
629a09ae | 1351 | }; |
6a1aa64f | 1352 | |
43af96e7 NK |
1353 | /** |
1354 | * Return the list of colors. This is either the list of colors passed in the | |
629a09ae | 1355 | * attributes or the autogenerated list of rgb(r,g,b) strings. |
e2c21500 | 1356 | * This does not return colors for invisible series. |
8ef9d44d | 1357 | * @return {Array.<string>} The list of colors. |
43af96e7 NK |
1358 | */ |
1359 | Dygraph.prototype.getColors = function() { | |
1360 | return this.colors_; | |
1361 | }; | |
1362 | ||
6a1aa64f | 1363 | /** |
e2c21500 DV |
1364 | * Returns a few attributes of a series, i.e. its color, its visibility, which |
1365 | * axis it's assigned to, and its column in the original data. | |
1366 | * Returns null if the series does not exist. | |
1367 | * Otherwise, returns an object with column, visibility, color and axis properties. | |
1368 | * The "axis" property will be set to 1 for y1 and 2 for y2. | |
1369 | * The "column" property can be fed back into getValue(row, column) to get | |
1370 | * values for this series. | |
6a1aa64f | 1371 | */ |
e2c21500 DV |
1372 | Dygraph.prototype.getPropertiesForSeries = function(series_name) { |
1373 | var idx = -1; | |
1374 | var labels = this.getLabels(); | |
1375 | for (var i = 1; i < labels.length; i++) { | |
1376 | if (labels[i] == series_name) { | |
1377 | idx = i; | |
1378 | break; | |
b0c3b730 | 1379 | } |
6a1aa64f | 1380 | } |
e2c21500 | 1381 | if (idx == -1) return null; |
0abfbd7e | 1382 | |
e2c21500 DV |
1383 | return { |
1384 | name: series_name, | |
1385 | column: idx, | |
1386 | visible: this.visibility()[idx - 1], | |
189f8030 | 1387 | color: this.colorsMap_[series_name], |
16f00742 | 1388 | axis: 1 + this.attributes_.axisForSeries(series_name) |
e2c21500 | 1389 | }; |
0abfbd7e DV |
1390 | }; |
1391 | ||
1392 | /** | |
6a1aa64f | 1393 | * Create the text box to adjust the averaging period |
6a1aa64f DV |
1394 | * @private |
1395 | */ | |
285a6bda | 1396 | Dygraph.prototype.createRollInterface_ = function() { |
8c69de65 DV |
1397 | // Create a roller if one doesn't exist already. |
1398 | if (!this.roller_) { | |
1399 | this.roller_ = document.createElement("input"); | |
1400 | this.roller_.type = "text"; | |
1401 | this.roller_.style.display = "none"; | |
1402 | this.graphDiv.appendChild(this.roller_); | |
1403 | } | |
1404 | ||
b0963cdb | 1405 | var display = this.getBooleanOption('showRoller') ? 'block' : 'none'; |
26ca7938 | 1406 | |
0c38f187 | 1407 | var area = this.plotter_.area; |
b0c3b730 DV |
1408 | var textAttr = { "position": "absolute", |
1409 | "zIndex": 10, | |
0c38f187 DV |
1410 | "top": (area.y + area.h - 25) + "px", |
1411 | "left": (area.x + 1) + "px", | |
b0c3b730 | 1412 | "display": display |
6a1aa64f | 1413 | }; |
8c69de65 DV |
1414 | this.roller_.size = "2"; |
1415 | this.roller_.value = this.rollPeriod_; | |
b0c3b730 | 1416 | for (var name in textAttr) { |
85b99f0b | 1417 | if (textAttr.hasOwnProperty(name)) { |
8c69de65 | 1418 | this.roller_.style[name] = textAttr[name]; |
85b99f0b | 1419 | } |
b0c3b730 DV |
1420 | } |
1421 | ||
76171648 | 1422 | var dygraph = this; |
8c69de65 | 1423 | this.roller_.onchange = function() { dygraph.adjustRoll(dygraph.roller_.value); }; |
76171648 DV |
1424 | }; |
1425 | ||
629a09ae | 1426 | /** |
062ef401 JB |
1427 | * Set up all the mouse handlers needed to capture dragging behavior for zoom |
1428 | * events. | |
1429 | * @private | |
1430 | */ | |
1431 | Dygraph.prototype.createDragInterface_ = function() { | |
1432 | var context = { | |
1433 | // Tracks whether the mouse is down right now | |
1434 | isZooming: false, | |
1435 | isPanning: false, // is this drag part of a pan? | |
1436 | is2DPan: false, // if so, is that pan 1- or 2-dimensional? | |
8442269f RK |
1437 | dragStartX: null, // pixel coordinates |
1438 | dragStartY: null, // pixel coordinates | |
1439 | dragEndX: null, // pixel coordinates | |
1440 | dragEndY: null, // pixel coordinates | |
062ef401 | 1441 | dragDirection: null, |
8442269f RK |
1442 | prevEndX: null, // pixel coordinates |
1443 | prevEndY: null, // pixel coordinates | |
062ef401 | 1444 | prevDragDirection: null, |
421f1773 | 1445 | cancelNextDblclick: false, // see comment in dygraph-interaction-model.js |
062ef401 | 1446 | |
ec291cbe RK |
1447 | // The value on the left side of the graph when a pan operation starts. |
1448 | initialLeftmostDate: null, | |
1449 | ||
1450 | // The number of units each pixel spans. (This won't be valid for log | |
1451 | // scales) | |
1452 | xUnitsPerPixel: null, | |
062ef401 JB |
1453 | |
1454 | // TODO(danvk): update this comment | |
1455 | // The range in second/value units that the viewport encompasses during a | |
1456 | // panning operation. | |
1457 | dateRange: null, | |
1458 | ||
8442269f RK |
1459 | // Top-left corner of the canvas, in DOM coords |
1460 | // TODO(konigsberg): Rename topLeftCanvasX, topLeftCanvasY. | |
062ef401 JB |
1461 | px: 0, |
1462 | py: 0, | |
1463 | ||
965a030e | 1464 | // Values for use with panEdgeFraction, which limit how far outside the |
4cac8c7a RK |
1465 | // graph's data boundaries it can be panned. |
1466 | boundedDates: null, // [minDate, maxDate] | |
1467 | boundedValues: null, // [[minValue, maxValue] ...] | |
1468 | ||
2bad4d92 DV |
1469 | // We cover iframes during mouse interactions. See comments in |
1470 | // dygraph-utils.js for more info on why this is a good idea. | |
1471 | tarp: new Dygraph.IFrameTarp(), | |
1472 | ||
6a4587ac RK |
1473 | // contextB is the same thing as this context object but renamed. |
1474 | initializeMouseDown: function(event, g, contextB) { | |
062ef401 JB |
1475 | // prevents mouse drags from selecting page text. |
1476 | if (event.preventDefault) { | |
1477 | event.preventDefault(); // Firefox, Chrome, etc. | |
6a1aa64f | 1478 | } else { |
062ef401 JB |
1479 | event.returnValue = false; // IE |
1480 | event.cancelBubble = true; | |
6a1aa64f DV |
1481 | } |
1482 | ||
f381ac71 | 1483 | var canvasPos = Dygraph.findPos(g.canvas_); |
464b5f50 DV |
1484 | contextB.px = canvasPos.x; |
1485 | contextB.py = canvasPos.y; | |
806f92c1 DV |
1486 | contextB.dragStartX = Dygraph.dragGetX_(event, contextB); |
1487 | contextB.dragStartY = Dygraph.dragGetY_(event, contextB); | |
6a4587ac | 1488 | contextB.cancelNextDblclick = false; |
2bad4d92 | 1489 | contextB.tarp.cover(); |
3f50dabb DV |
1490 | }, |
1491 | destroy: function() { | |
1492 | var context = this; | |
1493 | if (context.isZooming || context.isPanning) { | |
1494 | context.isZooming = false; | |
1495 | context.dragStartX = null; | |
1496 | context.dragStartY = null; | |
1497 | } | |
1498 | ||
1499 | if (context.isPanning) { | |
1500 | context.isPanning = false; | |
1501 | context.draggingDate = null; | |
1502 | context.dateRange = null; | |
1503 | for (var i = 0; i < self.axes_.length; i++) { | |
1504 | delete self.axes_[i].draggingValue; | |
1505 | delete self.axes_[i].dragValueRange; | |
1506 | } | |
1507 | } | |
1508 | ||
1509 | context.tarp.uncover(); | |
6a1aa64f | 1510 | } |
062ef401 | 1511 | }; |
2b188b3d | 1512 | |
b0963cdb | 1513 | var interactionModel = this.getOption("interactionModel"); |
8b83c6cc | 1514 | |
062ef401 JB |
1515 | // Self is the graph. |
1516 | var self = this; | |
6faebb69 | 1517 | |
062ef401 JB |
1518 | // Function that binds the graph and context to the handler. |
1519 | var bindHandler = function(handler) { | |
1520 | return function(event) { | |
1521 | handler(event, self, context); | |
1522 | }; | |
1523 | }; | |
1524 | ||
1525 | for (var eventName in interactionModel) { | |
1526 | if (!interactionModel.hasOwnProperty(eventName)) continue; | |
aeca29ac | 1527 | this.addAndTrackEvent(this.mouseEventElement_, eventName, |
062ef401 JB |
1528 | bindHandler(interactionModel[eventName])); |
1529 | } | |
1530 | ||
1531 | // If the user releases the mouse button during a drag, but not over the | |
1532 | // canvas, then it doesn't count as a zooming action. | |
3f50dabb DV |
1533 | if (!interactionModel.willDestroyContextMyself) { |
1534 | var mouseUpHandler = function(event) { | |
1535 | context.destroy(); | |
1536 | }; | |
cb1261cb | 1537 | |
3f50dabb DV |
1538 | this.addAndTrackEvent(document, 'mouseup', mouseUpHandler); |
1539 | } | |
6a1aa64f DV |
1540 | }; |
1541 | ||
1542 | /** | |
1543 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
1544 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
1545 | * avoid extra redrawing, but it's tricky to avoid interactions with the status | |
1546 | * dots. | |
ccd9d7c2 | 1547 | * |
1bc88216 DV |
1548 | * @param {number} direction the direction of the zoom rectangle. Acceptable |
1549 | * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL. | |
1550 | * @param {number} startX The X position where the drag started, in canvas | |
1551 | * coordinates. | |
1552 | * @param {number} endX The current X position of the drag, in canvas coords. | |
1553 | * @param {number} startY The Y position where the drag started, in canvas | |
1554 | * coordinates. | |
1555 | * @param {number} endY The current Y position of the drag, in canvas coords. | |
1556 | * @param {number} prevDirection the value of direction on the previous call to | |
1557 | * this function. Used to avoid excess redrawing | |
1558 | * @param {number} prevEndX The value of endX on the previous call to this | |
1559 | * function. Used to avoid excess redrawing | |
1560 | * @param {number} prevEndY The value of endY on the previous call to this | |
1561 | * function. Used to avoid excess redrawing | |
6a1aa64f DV |
1562 | * @private |
1563 | */ | |
7201b11e JB |
1564 | Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY, |
1565 | endY, prevDirection, prevEndX, | |
1566 | prevEndY) { | |
2cf95fff | 1567 | var ctx = this.canvas_ctx_; |
6a1aa64f DV |
1568 | |
1569 | // Clean up from the previous rect if necessary | |
39b0e098 | 1570 | if (prevDirection == Dygraph.HORIZONTAL) { |
fa54c193 FXB |
1571 | ctx.clearRect(Math.min(startX, prevEndX), this.layout_.getPlotArea().y, |
1572 | Math.abs(startX - prevEndX), this.layout_.getPlotArea().h); | |
383d8473 | 1573 | } else if (prevDirection == Dygraph.VERTICAL) { |
fa54c193 FXB |
1574 | ctx.clearRect(this.layout_.getPlotArea().x, Math.min(startY, prevEndY), |
1575 | this.layout_.getPlotArea().w, Math.abs(startY - prevEndY)); | |
6a1aa64f DV |
1576 | } |
1577 | ||
1578 | // Draw a light-grey rectangle to show the new viewing area | |
39b0e098 | 1579 | if (direction == Dygraph.HORIZONTAL) { |
8b83c6cc RK |
1580 | if (endX && startX) { |
1581 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
fa54c193 FXB |
1582 | ctx.fillRect(Math.min(startX, endX), this.layout_.getPlotArea().y, |
1583 | Math.abs(endX - startX), this.layout_.getPlotArea().h); | |
8b83c6cc | 1584 | } |
920208fb | 1585 | } else if (direction == Dygraph.VERTICAL) { |
8b83c6cc RK |
1586 | if (endY && startY) { |
1587 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
fa54c193 FXB |
1588 | ctx.fillRect(this.layout_.getPlotArea().x, Math.min(startY, endY), |
1589 | this.layout_.getPlotArea().w, Math.abs(endY - startY)); | |
8b83c6cc | 1590 | } |
6a1aa64f | 1591 | } |
920208fb PF |
1592 | |
1593 | if (this.isUsingExcanvas_) { | |
1594 | this.currentZoomRectArgs_ = [direction, startX, endX, startY, endY, 0, 0, 0]; | |
1595 | } | |
1596 | }; | |
1597 | ||
1598 | /** | |
1599 | * Clear the zoom rectangle (and perform no zoom). | |
1600 | * @private | |
1601 | */ | |
1602 | Dygraph.prototype.clearZoomRect_ = function() { | |
1603 | this.currentZoomRectArgs_ = null; | |
7c39bb3a | 1604 | this.canvas_ctx_.clearRect(0, 0, this.width_, this.height_); |
6a1aa64f DV |
1605 | }; |
1606 | ||
1607 | /** | |
8b83c6cc RK |
1608 | * Zoom to something containing [lowX, highX]. These are pixel coordinates in |
1609 | * the canvas. The exact zoom window may be slightly larger if there are no data | |
1610 | * points near lowX or highX. Don't confuse this function with doZoomXDates, | |
1611 | * which accepts dates that match the raw data. This function redraws the graph. | |
d58ae307 | 1612 | * |
1bc88216 DV |
1613 | * @param {number} lowX The leftmost pixel value that should be visible. |
1614 | * @param {number} highX The rightmost pixel value that should be visible. | |
6a1aa64f DV |
1615 | * @private |
1616 | */ | |
8b83c6cc | 1617 | Dygraph.prototype.doZoomX_ = function(lowX, highX) { |
920208fb | 1618 | this.currentZoomRectArgs_ = null; |
6a1aa64f | 1619 | // Find the earliest and latest dates contained in this canvasx range. |
8b83c6cc | 1620 | // Convert the call to date ranges of the raw data. |
ff022deb RK |
1621 | var minDate = this.toDataXCoord(lowX); |
1622 | var maxDate = this.toDataXCoord(highX); | |
8b83c6cc RK |
1623 | this.doZoomXDates_(minDate, maxDate); |
1624 | }; | |
6a1aa64f | 1625 | |
8b83c6cc RK |
1626 | /** |
1627 | * Zoom to something containing [minDate, maxDate] values. Don't confuse this | |
1628 | * method with doZoomX which accepts pixel coordinates. This function redraws | |
1629 | * the graph. | |
d58ae307 | 1630 | * |
1bc88216 DV |
1631 | * @param {number} minDate The minimum date that should be visible. |
1632 | * @param {number} maxDate The maximum date that should be visible. | |
8b83c6cc RK |
1633 | * @private |
1634 | */ | |
1635 | Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) { | |
5b9b2142 RK |
1636 | // TODO(danvk): when xAxisRange is null (i.e. "fit to data", the animation |
1637 | // can produce strange effects. Rather than the x-axis transitioning slowly | |
b1a3b195 DV |
1638 | // between values, it can jerk around.) |
1639 | var old_window = this.xAxisRange(); | |
1640 | var new_window = [minDate, maxDate]; | |
57baab03 | 1641 | this.zoomed_x_ = true; |
b1a3b195 DV |
1642 | var that = this; |
1643 | this.doAnimatedZoom(old_window, new_window, null, null, function() { | |
b0963cdb | 1644 | if (that.getFunctionOption("zoomCallback")) { |
4ee251cb | 1645 | that.getFunctionOption("zoomCallback").call(that, |
b0963cdb | 1646 | minDate, maxDate, that.yAxisRanges()); |
b1a3b195 DV |
1647 | } |
1648 | }); | |
8b83c6cc RK |
1649 | }; |
1650 | ||
1651 | /** | |
1652 | * Zoom to something containing [lowY, highY]. These are pixel coordinates in | |
d58ae307 DV |
1653 | * the canvas. This function redraws the graph. |
1654 | * | |
1bc88216 DV |
1655 | * @param {number} lowY The topmost pixel value that should be visible. |
1656 | * @param {number} highY The lowest pixel value that should be visible. | |
8b83c6cc RK |
1657 | * @private |
1658 | */ | |
1659 | Dygraph.prototype.doZoomY_ = function(lowY, highY) { | |
920208fb | 1660 | this.currentZoomRectArgs_ = null; |
d58ae307 DV |
1661 | // Find the highest and lowest values in pixel range for each axis. |
1662 | // Note that lowY (in pixels) corresponds to the max Value (in data coords). | |
1663 | // This is because pixels increase as you go down on the screen, whereas data | |
1664 | // coordinates increase as you go up the screen. | |
b1a3b195 DV |
1665 | var oldValueRanges = this.yAxisRanges(); |
1666 | var newValueRanges = []; | |
d58ae307 | 1667 | for (var i = 0; i < this.axes_.length; i++) { |
ff022deb RK |
1668 | var hi = this.toDataYCoord(lowY, i); |
1669 | var low = this.toDataYCoord(highY, i); | |
b1a3b195 | 1670 | newValueRanges.push([low, hi]); |
d58ae307 | 1671 | } |
8b83c6cc | 1672 | |
57baab03 | 1673 | this.zoomed_y_ = true; |
b1a3b195 DV |
1674 | var that = this; |
1675 | this.doAnimatedZoom(null, null, oldValueRanges, newValueRanges, function() { | |
b0963cdb | 1676 | if (that.getFunctionOption("zoomCallback")) { |
b1a3b195 | 1677 | var xRange = that.xAxisRange(); |
4ee251cb | 1678 | that.getFunctionOption("zoomCallback").call(that, |
b0963cdb | 1679 | xRange[0], xRange[1], that.yAxisRanges()); |
b1a3b195 DV |
1680 | } |
1681 | }); | |
8b83c6cc RK |
1682 | }; |
1683 | ||
1684 | /** | |
5b9b2142 RK |
1685 | * Transition function to use in animations. Returns values between 0.0 |
1686 | * (totally old values) and 1.0 (totally new values) for each frame. | |
1687 | * @private | |
1688 | */ | |
1689 | Dygraph.zoomAnimationFunction = function(frame, numFrames) { | |
1690 | var k = 1.5; | |
1691 | return (1.0 - Math.pow(k, -frame)) / (1.0 - Math.pow(k, -numFrames)); | |
1692 | }; | |
1693 | ||
1694 | /** | |
8b83c6cc RK |
1695 | * Reset the zoom to the original view coordinates. This is the same as |
1696 | * double-clicking on the graph. | |
8b83c6cc | 1697 | */ |
e4f6e11a | 1698 | Dygraph.prototype.resetZoom = function() { |
b1a3b195 | 1699 | var dirty = false, dirtyX = false, dirtyY = false; |
758a629f | 1700 | if (this.dateWindow_ !== null) { |
d58ae307 | 1701 | dirty = true; |
b1a3b195 | 1702 | dirtyX = true; |
8b83c6cc | 1703 | } |
d58ae307 DV |
1704 | |
1705 | for (var i = 0; i < this.axes_.length; i++) { | |
1f6a6254 | 1706 | if (typeof(this.axes_[i].valueWindow) !== 'undefined' && this.axes_[i].valueWindow !== null) { |
d58ae307 | 1707 | dirty = true; |
b1a3b195 | 1708 | dirtyY = true; |
d58ae307 | 1709 | } |
8b83c6cc RK |
1710 | } |
1711 | ||
da1369a5 DV |
1712 | // Clear any selection, since it's likely to be drawn in the wrong place. |
1713 | this.clearSelection(); | |
1714 | ||
8b83c6cc | 1715 | if (dirty) { |
57baab03 NN |
1716 | this.zoomed_x_ = false; |
1717 | this.zoomed_y_ = false; | |
b1a3b195 DV |
1718 | |
1719 | var minDate = this.rawData_[0][0]; | |
1720 | var maxDate = this.rawData_[this.rawData_.length - 1][0]; | |
1721 | ||
1722 | // With only one frame, don't bother calculating extreme ranges. | |
1723 | // TODO(danvk): merge this block w/ the code below. | |
b0963cdb | 1724 | if (!this.getBooleanOption("animatedZooms")) { |
b1a3b195 | 1725 | this.dateWindow_ = null; |
758a629f DV |
1726 | for (i = 0; i < this.axes_.length; i++) { |
1727 | if (this.axes_[i].valueWindow !== null) { | |
b1a3b195 DV |
1728 | delete this.axes_[i].valueWindow; |
1729 | } | |
1730 | } | |
1731 | this.drawGraph_(); | |
b0963cdb | 1732 | if (this.getFunctionOption("zoomCallback")) { |
4ee251cb | 1733 | this.getFunctionOption("zoomCallback").call(this, |
b0963cdb | 1734 | minDate, maxDate, this.yAxisRanges()); |
b1a3b195 DV |
1735 | } |
1736 | return; | |
1737 | } | |
1738 | ||
1739 | var oldWindow=null, newWindow=null, oldValueRanges=null, newValueRanges=null; | |
1740 | if (dirtyX) { | |
1741 | oldWindow = this.xAxisRange(); | |
1742 | newWindow = [minDate, maxDate]; | |
1743 | } | |
1744 | ||
1745 | if (dirtyY) { | |
1746 | oldValueRanges = this.yAxisRanges(); | |
1747 | // TODO(danvk): this is pretty inefficient | |
1748 | var packed = this.gatherDatasets_(this.rolledSeries_, null); | |
30a5cfc6 | 1749 | var extremes = packed.extremes; |
b1a3b195 DV |
1750 | |
1751 | // this has the side-effect of modifying this.axes_. | |
1752 | // this doesn't make much sense in this context, but it's convenient (we | |
1753 | // need this.axes_[*].extremeValues) and not harmful since we'll be | |
1754 | // calling drawGraph_ shortly, which clobbers these values. | |
1755 | this.computeYAxisRanges_(extremes); | |
1756 | ||
1757 | newValueRanges = []; | |
758a629f | 1758 | for (i = 0; i < this.axes_.length; i++) { |
1f6a6254 | 1759 | var axis = this.axes_[i]; |
681a215e DV |
1760 | newValueRanges.push((axis.valueRange !== null && |
1761 | axis.valueRange !== undefined) ? | |
42a9ebb8 | 1762 | axis.valueRange : axis.extremeRange); |
b1a3b195 DV |
1763 | } |
1764 | } | |
1765 | ||
1766 | var that = this; | |
1767 | this.doAnimatedZoom(oldWindow, newWindow, oldValueRanges, newValueRanges, | |
1768 | function() { | |
1769 | that.dateWindow_ = null; | |
1770 | for (var i = 0; i < that.axes_.length; i++) { | |
758a629f | 1771 | if (that.axes_[i].valueWindow !== null) { |
b1a3b195 DV |
1772 | delete that.axes_[i].valueWindow; |
1773 | } | |
1774 | } | |
b0963cdb | 1775 | if (that.getFunctionOption("zoomCallback")) { |
4ee251cb | 1776 | that.getFunctionOption("zoomCallback").call(that, |
b0963cdb | 1777 | minDate, maxDate, that.yAxisRanges()); |
b1a3b195 DV |
1778 | } |
1779 | }); | |
1780 | } | |
1781 | }; | |
1782 | ||
1783 | /** | |
1784 | * Combined animation logic for all zoom functions. | |
1785 | * either the x parameters or y parameters may be null. | |
1786 | * @private | |
1787 | */ | |
1788 | Dygraph.prototype.doAnimatedZoom = function(oldXRange, newXRange, oldYRanges, newYRanges, callback) { | |
b0963cdb DV |
1789 | var steps = this.getBooleanOption("animatedZooms") ? |
1790 | Dygraph.ANIMATION_STEPS : 1; | |
b1a3b195 DV |
1791 | |
1792 | var windows = []; | |
1793 | var valueRanges = []; | |
758a629f | 1794 | var step, frac; |
b1a3b195 | 1795 | |
758a629f DV |
1796 | if (oldXRange !== null && newXRange !== null) { |
1797 | for (step = 1; step <= steps; step++) { | |
1798 | frac = Dygraph.zoomAnimationFunction(step, steps); | |
b1a3b195 DV |
1799 | windows[step-1] = [oldXRange[0]*(1-frac) + frac*newXRange[0], |
1800 | oldXRange[1]*(1-frac) + frac*newXRange[1]]; | |
8b83c6cc | 1801 | } |
67e650dc | 1802 | } |
b1a3b195 | 1803 | |
758a629f DV |
1804 | if (oldYRanges !== null && newYRanges !== null) { |
1805 | for (step = 1; step <= steps; step++) { | |
1806 | frac = Dygraph.zoomAnimationFunction(step, steps); | |
b1a3b195 DV |
1807 | var thisRange = []; |
1808 | for (var j = 0; j < this.axes_.length; j++) { | |
1809 | thisRange.push([oldYRanges[j][0]*(1-frac) + frac*newYRanges[j][0], | |
1810 | oldYRanges[j][1]*(1-frac) + frac*newYRanges[j][1]]); | |
1811 | } | |
1812 | valueRanges[step-1] = thisRange; | |
1813 | } | |
1814 | } | |
1815 | ||
1816 | var that = this; | |
1817 | Dygraph.repeatAndCleanup(function(step) { | |
1818 | if (valueRanges.length) { | |
1819 | for (var i = 0; i < that.axes_.length; i++) { | |
1820 | var w = valueRanges[step][i]; | |
1821 | that.axes_[i].valueWindow = [w[0], w[1]]; | |
1822 | } | |
1823 | } | |
1824 | if (windows.length) { | |
1825 | that.dateWindow_ = windows[step]; | |
1826 | } | |
1827 | that.drawGraph_(); | |
1828 | }, steps, Dygraph.ANIMATION_DURATION / steps, callback); | |
6a1aa64f DV |
1829 | }; |
1830 | ||
1831 | /** | |
857a6931 KW |
1832 | * Get the current graph's area object. |
1833 | * | |
1834 | * Returns: {x, y, w, h} | |
6a1aa64f | 1835 | */ |
857a6931 KW |
1836 | Dygraph.prototype.getArea = function() { |
1837 | return this.plotter_.area; | |
1838 | }; | |
e863a17d | 1839 | |
857a6931 KW |
1840 | /** |
1841 | * Convert a mouse event to DOM coordinates relative to the graph origin. | |
1842 | * | |
1843 | * Returns a two-element array: [X, Y]. | |
1844 | */ | |
1845 | Dygraph.prototype.eventToDomCoords = function(event) { | |
abc8c570 RK |
1846 | if (event.offsetX && event.offsetY) { |
1847 | return [ event.offsetX, event.offsetY ]; | |
1848 | } else { | |
4d9f1cb9 | 1849 | var eventElementPos = Dygraph.findPos(this.mouseEventElement_); |
464b5f50 DV |
1850 | var canvasx = Dygraph.pageX(event) - eventElementPos.x; |
1851 | var canvasy = Dygraph.pageY(event) - eventElementPos.y; | |
abc8c570 RK |
1852 | return [canvasx, canvasy]; |
1853 | } | |
857a6931 | 1854 | }; |
4cac8c7a | 1855 | |
857a6931 KW |
1856 | /** |
1857 | * Given a canvas X coordinate, find the closest row. | |
1bc88216 DV |
1858 | * @param {number} domX graph-relative DOM X coordinate |
1859 | * Returns {number} row number. | |
857a6931 KW |
1860 | * @private |
1861 | */ | |
1862 | Dygraph.prototype.findClosestRow = function(domX) { | |
81cb07d6 | 1863 | var minDistX = Infinity; |
a703cbdf | 1864 | var closestRow = -1; |
a12a78ae DV |
1865 | var sets = this.layout_.points; |
1866 | for (var i = 0; i < sets.length; i++) { | |
1867 | var points = sets[i]; | |
1868 | var len = points.length; | |
1869 | for (var j = 0; j < len; j++) { | |
1870 | var point = points[j]; | |
1871 | if (!Dygraph.isValidPoint(point, true)) continue; | |
1872 | var dist = Math.abs(point.canvasx - domX); | |
1873 | if (dist < minDistX) { | |
1874 | minDistX = dist; | |
a703cbdf | 1875 | closestRow = point.idx; |
a12a78ae | 1876 | } |
a937d031 | 1877 | } |
6a1aa64f | 1878 | } |
a12a78ae | 1879 | |
a703cbdf | 1880 | return closestRow; |
857a6931 | 1881 | }; |
6a1aa64f | 1882 | |
857a6931 | 1883 | /** |
2a02e5dd KW |
1884 | * Given canvas X,Y coordinates, find the closest point. |
1885 | * | |
1886 | * This finds the individual data point across all visible series | |
1887 | * that's closest to the supplied DOM coordinates using the standard | |
1888 | * Euclidean X,Y distance. | |
1889 | * | |
1bc88216 DV |
1890 | * @param {number} domX graph-relative DOM X coordinate |
1891 | * @param {number} domY graph-relative DOM Y coordinate | |
857a6931 KW |
1892 | * Returns: {row, seriesName, point} |
1893 | * @private | |
1894 | */ | |
1895 | Dygraph.prototype.findClosestPoint = function(domX, domY) { | |
81cb07d6 | 1896 | var minDist = Infinity; |
55231c07 | 1897 | var dist, dx, dy, point, closestPoint, closestSeries, closestRow; |
30a5cfc6 | 1898 | for ( var setIdx = this.layout_.points.length - 1 ; setIdx >= 0 ; --setIdx ) { |
a12a78ae DV |
1899 | var points = this.layout_.points[setIdx]; |
1900 | for (var i = 0; i < points.length; ++i) { | |
55231c07 | 1901 | point = points[i]; |
62c3d2fd | 1902 | if (!Dygraph.isValidPoint(point)) continue; |
857a6931 KW |
1903 | dx = point.canvasx - domX; |
1904 | dy = point.canvasy - domY; | |
1905 | dist = dx * dx + dy * dy; | |
81cb07d6 | 1906 | if (dist < minDist) { |
62c3d2fd | 1907 | minDist = dist; |
a937d031 KW |
1908 | closestPoint = point; |
1909 | closestSeries = setIdx; | |
55231c07 | 1910 | closestRow = point.idx; |
a937d031 | 1911 | } |
857a6931 KW |
1912 | } |
1913 | } | |
1914 | var name = this.layout_.setNames[closestSeries]; | |
1915 | return { | |
55231c07 | 1916 | row: closestRow, |
857a6931 KW |
1917 | seriesName: name, |
1918 | point: closestPoint | |
1919 | }; | |
1920 | }; | |
1921 | ||
1922 | /** | |
1923 | * Given canvas X,Y coordinates, find the touched area in a stacked graph. | |
2a02e5dd KW |
1924 | * |
1925 | * This first finds the X data point closest to the supplied DOM X coordinate, | |
1926 | * then finds the series which puts the Y coordinate on top of its filled area, | |
1927 | * using linear interpolation between adjacent point pairs. | |
1928 | * | |
1bc88216 DV |
1929 | * @param {number} domX graph-relative DOM X coordinate |
1930 | * @param {number} domY graph-relative DOM Y coordinate | |
857a6931 KW |
1931 | * Returns: {row, seriesName, point} |
1932 | * @private | |
1933 | */ | |
1934 | Dygraph.prototype.findStackedPoint = function(domX, domY) { | |
1935 | var row = this.findClosestRow(domX); | |
857a6931 | 1936 | var closestPoint, closestSeries; |
30a5cfc6 | 1937 | for (var setIdx = 0; setIdx < this.layout_.points.length; ++setIdx) { |
55231c07 DE |
1938 | var boundary = this.getLeftBoundary_(setIdx); |
1939 | var rowIdx = row - boundary; | |
a12a78ae DV |
1940 | var points = this.layout_.points[setIdx]; |
1941 | if (rowIdx >= points.length) continue; | |
1942 | var p1 = points[rowIdx]; | |
62c3d2fd | 1943 | if (!Dygraph.isValidPoint(p1)) continue; |
857a6931 | 1944 | var py = p1.canvasy; |
a12a78ae | 1945 | if (domX > p1.canvasx && rowIdx + 1 < points.length) { |
857a6931 | 1946 | // interpolate series Y value using next point |
a12a78ae | 1947 | var p2 = points[rowIdx + 1]; |
62c3d2fd KW |
1948 | if (Dygraph.isValidPoint(p2)) { |
1949 | var dx = p2.canvasx - p1.canvasx; | |
1950 | if (dx > 0) { | |
1951 | var r = (domX - p1.canvasx) / dx; | |
1952 | py += r * (p2.canvasy - p1.canvasy); | |
1953 | } | |
416b05ad | 1954 | } |
81cb07d6 | 1955 | } else if (domX < p1.canvasx && rowIdx > 0) { |
857a6931 | 1956 | // interpolate series Y value using previous point |
a12a78ae | 1957 | var p0 = points[rowIdx - 1]; |
62c3d2fd KW |
1958 | if (Dygraph.isValidPoint(p0)) { |
1959 | var dx = p1.canvasx - p0.canvasx; | |
1960 | if (dx > 0) { | |
1961 | var r = (p1.canvasx - domX) / dx; | |
1962 | py += r * (p0.canvasy - p1.canvasy); | |
1963 | } | |
12e4c741 | 1964 | } |
6a1aa64f | 1965 | } |
857a6931 | 1966 | // Stop if the point (domX, py) is above this series' upper edge |
42a9ebb8 | 1967 | if (setIdx === 0 || py < domY) { |
a937d031 KW |
1968 | closestPoint = p1; |
1969 | closestSeries = setIdx; | |
1970 | } | |
6a1aa64f | 1971 | } |
857a6931 KW |
1972 | var name = this.layout_.setNames[closestSeries]; |
1973 | return { | |
1974 | row: row, | |
1975 | seriesName: name, | |
1976 | point: closestPoint | |
1977 | }; | |
1978 | }; | |
6a1aa64f | 1979 | |
857a6931 | 1980 | /** |
6a1aa64f DV |
1981 | * When the mouse moves in the canvas, display information about a nearby data |
1982 | * point and draw dots over those points in the data series. This function | |
1983 | * takes care of cleanup of previously-drawn dots. | |
1984 | * @param {Object} event The mousemove event from the browser. | |
1985 | * @private | |
1986 | */ | |
285a6bda | 1987 | Dygraph.prototype.mouseMove_ = function(event) { |
e863a17d | 1988 | // This prevents JS errors when mousing over the canvas before data loads. |
4cac8c7a | 1989 | var points = this.layout_.points; |
a12a78ae | 1990 | if (points === undefined || points === null) return; |
e863a17d | 1991 | |
857a6931 KW |
1992 | var canvasCoords = this.eventToDomCoords(event); |
1993 | var canvasx = canvasCoords[0]; | |
1994 | var canvasy = canvasCoords[1]; | |
6a1aa64f | 1995 | |
b0963cdb | 1996 | var highlightSeriesOpts = this.getOption("highlightSeriesOpts"); |
857a6931 | 1997 | var selectionChanged = false; |
3f55b813 | 1998 | if (highlightSeriesOpts && !this.isSeriesLocked()) { |
857a6931 | 1999 | var closest; |
b0963cdb | 2000 | if (this.getBooleanOption("stackedGraph")) { |
857a6931 KW |
2001 | closest = this.findStackedPoint(canvasx, canvasy); |
2002 | } else { | |
2003 | closest = this.findClosestPoint(canvasx, canvasy); | |
43af96e7 | 2004 | } |
857a6931 | 2005 | selectionChanged = this.setSelection(closest.row, closest.seriesName); |
416b05ad | 2006 | } else { |
857a6931 KW |
2007 | var idx = this.findClosestRow(canvasx); |
2008 | selectionChanged = this.setSelection(idx); | |
12e4c741 | 2009 | } |
43af96e7 | 2010 | |
b0963cdb | 2011 | var callback = this.getFunctionOption("highlightCallback"); |
857a6931 | 2012 | if (callback && selectionChanged) { |
4ee251cb | 2013 | callback.call(this, event, |
870a309c DV |
2014 | this.lastx_, |
2015 | this.selPoints_, | |
55231c07 | 2016 | this.lastRow_, |
870a309c | 2017 | this.highlightSet_); |
12e4c741 | 2018 | } |
239c712d | 2019 | }; |
b258a3da | 2020 | |
239c712d | 2021 | /** |
55231c07 DE |
2022 | * Fetch left offset from the specified set index or if not passed, the |
2023 | * first defined boundaryIds record (see bug #236). | |
e2c21500 | 2024 | * @private |
81cb07d6 | 2025 | */ |
55231c07 | 2026 | Dygraph.prototype.getLeftBoundary_ = function(setIdx) { |
383d8473 | 2027 | if (this.boundaryIds_[setIdx]) { |
a703cbdf | 2028 | return this.boundaryIds_[setIdx][0]; |
55231c07 DE |
2029 | } else { |
2030 | for (var i = 0; i < this.boundaryIds_.length; i++) { | |
2031 | if (this.boundaryIds_[i] !== undefined) { | |
2032 | return this.boundaryIds_[i][0]; | |
2033 | } | |
81cb07d6 | 2034 | } |
55231c07 | 2035 | return 0; |
81cb07d6 | 2036 | } |
81cb07d6 KW |
2037 | }; |
2038 | ||
857a6931 KW |
2039 | Dygraph.prototype.animateSelection_ = function(direction) { |
2040 | var totalSteps = 10; | |
2041 | var millis = 30; | |
1d44ee5e KW |
2042 | if (this.fadeLevel === undefined) this.fadeLevel = 0; |
2043 | if (this.animateId === undefined) this.animateId = 0; | |
857a6931 KW |
2044 | var start = this.fadeLevel; |
2045 | var steps = direction < 0 ? start : totalSteps - start; | |
2046 | if (steps <= 0) { | |
2047 | if (this.fadeLevel) { | |
2048 | this.updateSelection_(1.0); | |
2049 | } | |
2050 | return; | |
2051 | } | |
2052 | ||
2053 | var thisId = ++this.animateId; | |
2054 | var that = this; | |
475f7420 KW |
2055 | Dygraph.repeatAndCleanup( |
2056 | function(n) { | |
2057 | // ignore simultaneous animations | |
2058 | if (that.animateId != thisId) return; | |
2059 | ||
2060 | that.fadeLevel += direction; | |
2061 | if (that.fadeLevel === 0) { | |
2062 | that.clearSelection(); | |
2063 | } else { | |
2064 | that.updateSelection_(that.fadeLevel / totalSteps); | |
2065 | } | |
2066 | }, | |
2067 | steps, millis, function() {}); | |
857a6931 KW |
2068 | }; |
2069 | ||
2ddb1197 | 2070 | /** |
239c712d NAG |
2071 | * Draw dots over the selectied points in the data series. This function |
2072 | * takes care of cleanup of previously-drawn dots. | |
2073 | * @private | |
2074 | */ | |
857a6931 | 2075 | Dygraph.prototype.updateSelection_ = function(opt_animFraction) { |
0cd1ad15 DV |
2076 | /*var defaultPrevented = */ |
2077 | this.cascadeEvents_('select', { | |
e2c21500 DV |
2078 | selectedX: this.lastx_, |
2079 | selectedPoints: this.selPoints_ | |
2080 | }); | |
2081 | // TODO(danvk): use defaultPrevented here? | |
2082 | ||
6a1aa64f | 2083 | // Clear the previously drawn vertical, if there is one |
758a629f | 2084 | var i; |
2cf95fff | 2085 | var ctx = this.canvas_ctx_; |
b0963cdb | 2086 | if (this.getOption('highlightSeriesOpts')) { |
857a6931 | 2087 | ctx.clearRect(0, 0, this.width_, this.height_); |
b0963cdb | 2088 | var alpha = 1.0 - this.getNumericOption('highlightSeriesBackgroundAlpha'); |
857a6931 | 2089 | if (alpha) { |
2a02e5dd KW |
2090 | // Activating background fade includes an animation effect for a gradual |
2091 | // fade. TODO(klausw): make this independently configurable if it causes | |
2092 | // issues? Use a shared preference to control animations? | |
2093 | var animateBackgroundFade = true; | |
2094 | if (animateBackgroundFade) { | |
857a6931 KW |
2095 | if (opt_animFraction === undefined) { |
2096 | // start a new animation | |
2097 | this.animateSelection_(1); | |
2098 | return; | |
2099 | } | |
2100 | alpha *= opt_animFraction; | |
2101 | } | |
2102 | ctx.fillStyle = 'rgba(255,255,255,' + alpha + ')'; | |
2103 | ctx.fillRect(0, 0, this.width_, this.height_); | |
2104 | } | |
38e3d209 DV |
2105 | |
2106 | // Redraw only the highlighted series in the interactive canvas (not the | |
2107 | // static plot canvas, which is where series are usually drawn). | |
2108 | this.plotter_._renderLineChart(this.highlightSet_, ctx); | |
857a6931 | 2109 | } else if (this.previousVerticalX_ >= 0) { |
46dde5f9 DV |
2110 | // Determine the maximum highlight circle size. |
2111 | var maxCircleSize = 0; | |
227b93cc | 2112 | var labels = this.attr_('labels'); |
758a629f | 2113 | for (i = 1; i < labels.length; i++) { |
b0963cdb | 2114 | var r = this.getNumericOption('highlightCircleSize', labels[i]); |
46dde5f9 DV |
2115 | if (r > maxCircleSize) maxCircleSize = r; |
2116 | } | |
6a1aa64f | 2117 | var px = this.previousVerticalX_; |
46dde5f9 DV |
2118 | ctx.clearRect(px - maxCircleSize - 1, 0, |
2119 | 2 * maxCircleSize + 2, this.height_); | |
6a1aa64f DV |
2120 | } |
2121 | ||
920208fb PF |
2122 | if (this.isUsingExcanvas_ && this.currentZoomRectArgs_) { |
2123 | Dygraph.prototype.drawZoomRect_.apply(this, this.currentZoomRectArgs_); | |
2124 | } | |
2125 | ||
d160cc3b | 2126 | if (this.selPoints_.length > 0) { |
6a1aa64f | 2127 | // Draw colored circles over the center of each selected point |
e9fe4a2f | 2128 | var canvasx = this.selPoints_[0].canvasx; |
43af96e7 | 2129 | ctx.save(); |
758a629f | 2130 | for (i = 0; i < this.selPoints_.length; i++) { |
e9fe4a2f DV |
2131 | var pt = this.selPoints_[i]; |
2132 | if (!Dygraph.isOK(pt.canvasy)) continue; | |
2133 | ||
b0963cdb DV |
2134 | var circleSize = this.getNumericOption('highlightCircleSize', pt.name); |
2135 | var callback = this.getFunctionOption("drawHighlightPointCallback", pt.name); | |
a8ef67a8 | 2136 | var color = this.plotter_.colors[pt.name]; |
78e58af4 RK |
2137 | if (!callback) { |
2138 | callback = Dygraph.Circles.DEFAULT; | |
2139 | } | |
b0963cdb | 2140 | ctx.lineWidth = this.getNumericOption('strokeWidth', pt.name); |
a8ef67a8 KW |
2141 | ctx.strokeStyle = color; |
2142 | ctx.fillStyle = color; | |
4ee251cb | 2143 | callback.call(this, this, pt.name, ctx, canvasx, pt.canvasy, |
ba697462 | 2144 | color, circleSize, pt.idx); |
6a1aa64f DV |
2145 | } |
2146 | ctx.restore(); | |
2147 | ||
2148 | this.previousVerticalX_ = canvasx; | |
2149 | } | |
2150 | }; | |
2151 | ||
2152 | /** | |
629a09ae DV |
2153 | * Manually set the selected points and display information about them in the |
2154 | * legend. The selection can be cleared using clearSelection() and queried | |
2155 | * using getSelection(). | |
1bc88216 | 2156 | * @param {number} row Row number that should be highlighted (i.e. appear with |
629a09ae | 2157 | * hover dots on the chart). Set to false to clear any selection. |
1bc88216 | 2158 | * @param {seriesName} optional series name to highlight that series with the |
857a6931 | 2159 | * the highlightSeriesOpts setting. |
b9a3ece4 KW |
2160 | * @param { locked } optional If true, keep seriesName selected when mousing |
2161 | * over the graph, disabling closest-series highlighting. Call clearSelection() | |
2162 | * to unlock it. | |
239c712d | 2163 | */ |
b9a3ece4 | 2164 | Dygraph.prototype.setSelection = function(row, opt_seriesName, opt_locked) { |
239c712d NAG |
2165 | // Extract the points we've selected |
2166 | this.selPoints_ = []; | |
50360fd0 | 2167 | |
857a6931 | 2168 | var changed = false; |
16269f6e | 2169 | if (row !== false && row >= 0) { |
857a6931 KW |
2170 | if (row != this.lastRow_) changed = true; |
2171 | this.lastRow_ = row; | |
30a5cfc6 KW |
2172 | for (var setIdx = 0; setIdx < this.layout_.points.length; ++setIdx) { |
2173 | var points = this.layout_.points[setIdx]; | |
8b7f7651 AV |
2174 | // Check if the point at the appropriate index is the point we're looking |
2175 | // for. If it is, just use it, otherwise search the array for a point | |
2176 | // in the proper place. | |
2177 | var setRow = row - this.getLeftBoundary_(setIdx); | |
2178 | if (setRow < points.length && points[setRow].idx == row) { | |
2179 | var point = points[setRow]; | |
2180 | if (point.yval !== null) this.selPoints_.push(point); | |
2181 | } else { | |
2182 | for (var pointIdx = 0; pointIdx < points.length; ++pointIdx) { | |
2183 | var point = points[pointIdx]; | |
2184 | if (point.idx == row) { | |
2185 | if (point.yval !== null) { | |
2186 | this.selPoints_.push(point); | |
2187 | } | |
2188 | break; | |
ad7785b8 | 2189 | } |
ad7785b8 | 2190 | } |
16269f6e | 2191 | } |
239c712d | 2192 | } |
857a6931 KW |
2193 | } else { |
2194 | if (this.lastRow_ >= 0) changed = true; | |
2195 | this.lastRow_ = -1; | |
16269f6e | 2196 | } |
50360fd0 | 2197 | |
16269f6e | 2198 | if (this.selPoints_.length) { |
239c712d | 2199 | this.lastx_ = this.selPoints_[0].xval; |
239c712d | 2200 | } else { |
857a6931 | 2201 | this.lastx_ = -1; |
239c712d NAG |
2202 | } |
2203 | ||
857a6931 KW |
2204 | if (opt_seriesName !== undefined) { |
2205 | if (this.highlightSet_ !== opt_seriesName) changed = true; | |
2206 | this.highlightSet_ = opt_seriesName; | |
239c712d NAG |
2207 | } |
2208 | ||
b9a3ece4 KW |
2209 | if (opt_locked !== undefined) { |
2210 | this.lockedSet_ = opt_locked; | |
2211 | } | |
2212 | ||
857a6931 KW |
2213 | if (changed) { |
2214 | this.updateSelection_(undefined); | |
2215 | } | |
2216 | return changed; | |
239c712d NAG |
2217 | }; |
2218 | ||
2219 | /** | |
6a1aa64f DV |
2220 | * The mouse has left the canvas. Clear out whatever artifacts remain |
2221 | * @param {Object} event the mouseout event from the browser. | |
2222 | * @private | |
2223 | */ | |
285a6bda | 2224 | Dygraph.prototype.mouseOut_ = function(event) { |
b0963cdb | 2225 | if (this.getFunctionOption("unhighlightCallback")) { |
4ee251cb | 2226 | this.getFunctionOption("unhighlightCallback").call(this, event); |
a4c6a67c AV |
2227 | } |
2228 | ||
4ee251cb | 2229 | if (this.getBooleanOption("hideOverlayOnMouseOut") && !this.lockedSet_) { |
239c712d | 2230 | this.clearSelection(); |
43af96e7 | 2231 | } |
6a1aa64f DV |
2232 | }; |
2233 | ||
239c712d | 2234 | /** |
629a09ae DV |
2235 | * Clears the current selection (i.e. points that were highlighted by moving |
2236 | * the mouse over the chart). | |
239c712d NAG |
2237 | */ |
2238 | Dygraph.prototype.clearSelection = function() { | |
e2c21500 DV |
2239 | this.cascadeEvents_('deselect', {}); |
2240 | ||
b9a3ece4 | 2241 | this.lockedSet_ = false; |
239c712d | 2242 | // Get rid of the overlay data |
857a6931 KW |
2243 | if (this.fadeLevel) { |
2244 | this.animateSelection_(-1); | |
2245 | return; | |
2246 | } | |
2cf95fff | 2247 | this.canvas_ctx_.clearRect(0, 0, this.width_, this.height_); |
857a6931 | 2248 | this.fadeLevel = 0; |
239c712d NAG |
2249 | this.selPoints_ = []; |
2250 | this.lastx_ = -1; | |
857a6931 KW |
2251 | this.lastRow_ = -1; |
2252 | this.highlightSet_ = null; | |
758a629f | 2253 | }; |
239c712d | 2254 | |
103b7292 | 2255 | /** |
629a09ae DV |
2256 | * Returns the number of the currently selected row. To get data for this row, |
2257 | * you can use the getValue method. | |
1bc88216 | 2258 | * @return {number} row number, or -1 if nothing is selected |
103b7292 NAG |
2259 | */ |
2260 | Dygraph.prototype.getSelection = function() { | |
2261 | if (!this.selPoints_ || this.selPoints_.length < 1) { | |
2262 | return -1; | |
2263 | } | |
50360fd0 | 2264 | |
a12a78ae DV |
2265 | for (var setIdx = 0; setIdx < this.layout_.points.length; setIdx++) { |
2266 | var points = this.layout_.points[setIdx]; | |
2267 | for (var row = 0; row < points.length; row++) { | |
2268 | if (points[row].x == this.selPoints_[0].x) { | |
55231c07 | 2269 | return points[row].idx; |
a12a78ae | 2270 | } |
103b7292 NAG |
2271 | } |
2272 | } | |
2273 | return -1; | |
2e1fcf1a | 2274 | }; |
103b7292 | 2275 | |
e2c21500 DV |
2276 | /** |
2277 | * Returns the name of the currently-highlighted series. | |
2278 | * Only available when the highlightSeriesOpts option is in use. | |
2279 | */ | |
857a6931 KW |
2280 | Dygraph.prototype.getHighlightSeries = function() { |
2281 | return this.highlightSet_; | |
2282 | }; | |
2283 | ||
19589a3e | 2284 | /** |
3f55b813 KW |
2285 | * Returns true if the currently-highlighted series was locked |
2286 | * via setSelection(..., seriesName, true). | |
2287 | */ | |
2288 | Dygraph.prototype.isSeriesLocked = function() { | |
2289 | return this.lockedSet_; | |
2290 | }; | |
2291 | ||
2292 | /** | |
6a1aa64f | 2293 | * Fires when there's data available to be graphed. |
1bc88216 | 2294 | * @param {string} data Raw CSV data to be plotted |
6a1aa64f DV |
2295 | * @private |
2296 | */ | |
285a6bda | 2297 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f | 2298 | this.rawData_ = this.parseCSV_(data); |
6f5f0b2b | 2299 | this.cascadeDataDidUpdateEvent_(); |
26ca7938 | 2300 | this.predraw_(); |
6a1aa64f DV |
2301 | }; |
2302 | ||
6a1aa64f DV |
2303 | /** |
2304 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
2305 | * @private | |
2306 | */ | |
285a6bda | 2307 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f | 2308 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
7201b11e | 2309 | var range; |
6a1aa64f | 2310 | if (this.dateWindow_) { |
7201b11e | 2311 | range = [this.dateWindow_[0], this.dateWindow_[1]]; |
6a1aa64f | 2312 | } else { |
ccecde93 | 2313 | range = this.xAxisExtremes(); |
7201b11e JB |
2314 | } |
2315 | ||
48e614ac DV |
2316 | var xAxisOptionsView = this.optionsViewForAxis_('x'); |
2317 | var xTicks = xAxisOptionsView('ticker')( | |
2318 | range[0], | |
2319 | range[1], | |
2320 | this.width_, // TODO(danvk): should be area.width | |
2321 | xAxisOptionsView, | |
2322 | this); | |
2323 | // var msg = 'ticker(' + range[0] + ', ' + range[1] + ', ' + this.width_ + ', ' + this.attr_('pixelsPerXLabel') + ') -> ' + JSON.stringify(xTicks); | |
2324 | // console.log(msg); | |
b2c9222a | 2325 | this.layout_.setXTicks(xTicks); |
32988383 DV |
2326 | }; |
2327 | ||
629a09ae | 2328 | /** |
3ea41d86 | 2329 | * Returns the correct handler class for the currently set options. |
629a09ae | 2330 | * @private |
3ea41d86 DV |
2331 | */ |
2332 | Dygraph.prototype.getHandlerClass_ = function() { | |
2333 | var handlerClass; | |
2334 | if (this.attr_('dataHandler')) { | |
2335 | handlerClass = this.attr_('dataHandler'); | |
2336 | } else if (this.fractions_) { | |
b0963cdb | 2337 | if (this.getBooleanOption('errorBars')) { |
3ea41d86 | 2338 | handlerClass = Dygraph.DataHandlers.FractionsBarsHandler; |
a49c164a | 2339 | } else { |
3ea41d86 | 2340 | handlerClass = Dygraph.DataHandlers.DefaultFractionHandler; |
5011e7a1 | 2341 | } |
b0963cdb | 2342 | } else if (this.getBooleanOption('customBars')) { |
3ea41d86 | 2343 | handlerClass = Dygraph.DataHandlers.CustomBarsHandler; |
b0963cdb | 2344 | } else if (this.getBooleanOption('errorBars')) { |
3ea41d86 | 2345 | handlerClass = Dygraph.DataHandlers.ErrorBarsHandler; |
5011e7a1 | 2346 | } else { |
3ea41d86 | 2347 | handlerClass = Dygraph.DataHandlers.DefaultHandler; |
5011e7a1 | 2348 | } |
3ea41d86 | 2349 | return handlerClass; |
5011e7a1 DV |
2350 | }; |
2351 | ||
6a1aa64f | 2352 | /** |
629a09ae | 2353 | * @private |
26ca7938 DV |
2354 | * This function is called once when the chart's data is changed or the options |
2355 | * dictionary is updated. It is _not_ called when the user pans or zooms. The | |
2356 | * idea is that values derived from the chart's data can be computed here, | |
2357 | * rather than every time the chart is drawn. This includes things like the | |
2358 | * number of axes, rolling averages, etc. | |
2359 | */ | |
2360 | Dygraph.prototype.predraw_ = function() { | |
7153e001 | 2361 | var start = new Date(); |
a49c164a DE |
2362 | |
2363 | // Create the correct dataHandler | |
3ea41d86 | 2364 | this.dataHandler_ = new (this.getHandlerClass_())(); |
7153e001 | 2365 | |
0d216a60 PF |
2366 | this.layout_.computePlotArea(); |
2367 | ||
26ca7938 DV |
2368 | // TODO(danvk): move more computations out of drawGraph_ and into here. |
2369 | this.computeYAxes_(); | |
2370 | ||
383d8473 | 2371 | if (!this.is_initial_draw_) { |
aeca29ac RK |
2372 | this.canvas_ctx_.restore(); |
2373 | this.hidden_ctx_.restore(); | |
2374 | } | |
2375 | ||
2376 | this.canvas_ctx_.save(); | |
2377 | this.hidden_ctx_.save(); | |
2378 | ||
c04c8044 | 2379 | // Create a new plotter. |
26ca7938 | 2380 | this.plotter_ = new DygraphCanvasRenderer(this, |
2cf95fff RK |
2381 | this.hidden_, |
2382 | this.hidden_ctx_, | |
0e23cfc6 | 2383 | this.layout_); |
26ca7938 | 2384 | |
0abfbd7e DV |
2385 | // The roller sits in the bottom left corner of the chart. We don't know where |
2386 | // this will be until the options are available, so it's positioned here. | |
8c69de65 | 2387 | this.createRollInterface_(); |
26ca7938 | 2388 | |
e2c21500 | 2389 | this.cascadeEvents_('predraw'); |
0abfbd7e | 2390 | |
b1a3b195 DV |
2391 | // Convert the raw data (a 2D array) into the internal format and compute |
2392 | // rolling averages. | |
2393 | this.rolledSeries_ = [null]; // x-axis is the first series and it's special | |
395e98a3 | 2394 | for (var i = 1; i < this.numColumns(); i++) { |
c1780ad0 | 2395 | // var logScale = this.attr_('logscale', i); // TODO(klausw): this looks wrong // konigsberg thinks so too. |
a49c164a DE |
2396 | var series = this.dataHandler_.extractSeries(this.rawData_, i, this.attributes_); |
2397 | if (this.rollPeriod_ > 1) { | |
2398 | series = this.dataHandler_.rollingAverage(series, this.rollPeriod_, this.attributes_); | |
2399 | } | |
2400 | ||
b1a3b195 DV |
2401 | this.rolledSeries_.push(series); |
2402 | } | |
2403 | ||
26ca7938 DV |
2404 | // If the data or options have changed, then we'd better redraw. |
2405 | this.drawGraph_(); | |
4b4d1a63 DV |
2406 | |
2407 | // This is used to determine whether to do various animations. | |
2408 | var end = new Date(); | |
2409 | this.drawingTimeMs_ = (end - start); | |
26ca7938 DV |
2410 | }; |
2411 | ||
2412 | /** | |
30a5cfc6 KW |
2413 | * Point structure. |
2414 | * | |
2415 | * xval_* and yval_* are the original unscaled data values, | |
2416 | * while x_* and y_* are scaled to the range (0.0-1.0) for plotting. | |
2417 | * yval_stacked is the cumulative Y value used for stacking graphs, | |
2418 | * and bottom/top/minus/plus are used for error bar graphs. | |
2419 | * | |
2420 | * @typedef {{ | |
2421 | * idx: number, | |
2422 | * name: string, | |
2423 | * x: ?number, | |
2424 | * xval: ?number, | |
2425 | * y_bottom: ?number, | |
2426 | * y: ?number, | |
2427 | * y_stacked: ?number, | |
2428 | * y_top: ?number, | |
2429 | * yval_minus: ?number, | |
2430 | * yval: ?number, | |
2431 | * yval_plus: ?number, | |
2432 | * yval_stacked | |
2433 | * }} | |
2434 | */ | |
bcc53a77 | 2435 | Dygraph.PointType = undefined; |
30a5cfc6 | 2436 | |
30a5cfc6 KW |
2437 | /** |
2438 | * Calculates point stacking for stackedGraph=true. | |
2439 | * | |
2440 | * For stacking purposes, interpolate or extend neighboring data across | |
2441 | * NaN values based on stackedGraphNaNFill settings. This is for display | |
2442 | * only, the underlying data value as shown in the legend remains NaN. | |
2443 | * | |
2444 | * @param {Array.<Dygraph.PointType>} points Point array for a single series. | |
2445 | * Updates each Point's yval_stacked property. | |
2446 | * @param {Array.<number>} cumulativeYval Accumulated top-of-graph stacked Y | |
2447 | * values for the series seen so far. Index is the row number. Updated | |
2448 | * based on the current series's values. | |
2449 | * @param {Array.<number>} seriesExtremes Min and max values, updated | |
2450 | * to reflect the stacked values. | |
2451 | * @param {string} fillMethod Interpolation method, one of 'all', 'inside', or | |
2452 | * 'none'. | |
24f2a74f | 2453 | * @private |
30a5cfc6 KW |
2454 | */ |
2455 | Dygraph.stackPoints_ = function( | |
2456 | points, cumulativeYval, seriesExtremes, fillMethod) { | |
2457 | var lastXval = null; | |
2458 | var prevPoint = null; | |
2459 | var nextPoint = null; | |
2460 | var nextPointIdx = -1; | |
2461 | ||
2462 | // Find the next stackable point starting from the given index. | |
bcc53a77 | 2463 | var updateNextPoint = function(idx) { |
30a5cfc6 KW |
2464 | // If we've previously found a non-NaN point and haven't gone past it yet, |
2465 | // just use that. | |
2466 | if (nextPointIdx >= idx) return; | |
2467 | ||
2468 | // We haven't found a non-NaN point yet or have moved past it, | |
2469 | // look towards the right to find a non-NaN point. | |
2470 | for (var j = idx; j < points.length; ++j) { | |
2471 | // Clear out a previously-found point (if any) since it's no longer | |
2472 | // valid, we shouldn't use it for interpolation anymore. | |
2473 | nextPoint = null; | |
2474 | if (!isNaN(points[j].yval) && points[j].yval !== null) { | |
2475 | nextPointIdx = j; | |
2476 | nextPoint = points[j]; | |
2477 | break; | |
2478 | } | |
2479 | } | |
2480 | }; | |
2481 | ||
2482 | for (var i = 0; i < points.length; ++i) { | |
2483 | var point = points[i]; | |
2484 | var xval = point.xval; | |
2485 | if (cumulativeYval[xval] === undefined) { | |
2486 | cumulativeYval[xval] = 0; | |
2487 | } | |
2488 | ||
2489 | var actualYval = point.yval; | |
2490 | if (isNaN(actualYval) || actualYval === null) { | |
06c0e1ee | 2491 | if(fillMethod == 'none') { |
30a5cfc6 | 2492 | actualYval = 0; |
d68137fd | 2493 | } else { |
06c0e1ee S |
2494 | // Interpolate/extend for stacking purposes if possible. |
2495 | updateNextPoint(i); | |
2496 | if (prevPoint && nextPoint && fillMethod != 'none') { | |
2497 | // Use linear interpolation between prevPoint and nextPoint. | |
2498 | actualYval = prevPoint.yval + (nextPoint.yval - prevPoint.yval) * | |
2499 | ((xval - prevPoint.xval) / (nextPoint.xval - prevPoint.xval)); | |
2500 | } else if (prevPoint && fillMethod == 'all') { | |
2501 | actualYval = prevPoint.yval; | |
2502 | } else if (nextPoint && fillMethod == 'all') { | |
2503 | actualYval = nextPoint.yval; | |
2504 | } else { | |
2505 | actualYval = 0; | |
2506 | } | |
30a5cfc6 KW |
2507 | } |
2508 | } else { | |
2509 | prevPoint = point; | |
2510 | } | |
2511 | ||
2512 | var stackedYval = cumulativeYval[xval]; | |
2513 | if (lastXval != xval) { | |
2514 | // If an x-value is repeated, we ignore the duplicates. | |
2515 | stackedYval += actualYval; | |
2516 | cumulativeYval[xval] = stackedYval; | |
2517 | } | |
2518 | lastXval = xval; | |
2519 | ||
2520 | point.yval_stacked = stackedYval; | |
2521 | ||
2522 | if (stackedYval > seriesExtremes[1]) { | |
2523 | seriesExtremes[1] = stackedYval; | |
2524 | } | |
2525 | if (stackedYval < seriesExtremes[0]) { | |
2526 | seriesExtremes[0] = stackedYval; | |
2527 | } | |
2528 | } | |
2529 | }; | |
2530 | ||
2531 | ||
2532 | /** | |
b1a3b195 DV |
2533 | * Loop over all fields and create datasets, calculating extreme y-values for |
2534 | * each series and extreme x-indices as we go. | |
fc4e84fa | 2535 | * |
b1a3b195 DV |
2536 | * dateWindow is passed in as an explicit parameter so that we can compute |
2537 | * extreme values "speculatively", i.e. without actually setting state on the | |
2538 | * dygraph. | |
fc4e84fa | 2539 | * |
30a5cfc6 KW |
2540 | * @param {Array.<Array.<Array.<(number|Array<number>)>>} rolledSeries, where |
2541 | * rolledSeries[seriesIndex][row] = raw point, where | |
2542 | * seriesIndex is the column number starting with 1, and | |
2543 | * rawPoint is [x,y] or [x, [y, err]] or [x, [y, yminus, yplus]]. | |
2544 | * @param {?Array.<number>} dateWindow [xmin, xmax] pair, or null. | |
2545 | * @return {{ | |
2546 | * points: Array.<Array.<Dygraph.PointType>>, | |
2547 | * seriesExtremes: Array.<Array.<number>>, | |
2548 | * boundaryIds: Array.<number>}} | |
6a1aa64f DV |
2549 | * @private |
2550 | */ | |
b1a3b195 DV |
2551 | Dygraph.prototype.gatherDatasets_ = function(rolledSeries, dateWindow) { |
2552 | var boundaryIds = []; | |
30a5cfc6 KW |
2553 | var points = []; |
2554 | var cumulativeYval = []; // For stacked series. | |
f09fc545 | 2555 | var extremes = {}; // series name -> [low, high] |
a49c164a DE |
2556 | var seriesIdx, sampleIdx; |
2557 | var firstIdx, lastIdx; | |
8b5f1691 | 2558 | var axisIdx; |
a49c164a | 2559 | |
b1a3b195 DV |
2560 | // Loop over the fields (series). Go from the last to the first, |
2561 | // because if they're stacked that's how we accumulate the values. | |
2562 | var num_series = rolledSeries.length - 1; | |
bcc53a77 | 2563 | var series; |
a49c164a DE |
2564 | for (seriesIdx = num_series; seriesIdx >= 1; seriesIdx--) { |
2565 | if (!this.visibility()[seriesIdx - 1]) continue; | |
1cf11047 | 2566 | |
6a1aa64f | 2567 | // Prune down to the desired range, if necessary (for zooming) |
1a26f3fb DV |
2568 | // Because there can be lines going to points outside of the visible area, |
2569 | // we actually prune to visible points, plus one on either side. | |
b1a3b195 | 2570 | if (dateWindow) { |
a49c164a | 2571 | series = rolledSeries[seriesIdx]; |
b1a3b195 DV |
2572 | var low = dateWindow[0]; |
2573 | var high = dateWindow[1]; | |
4e59e63e | 2574 | |
1a26f3fb DV |
2575 | // TODO(danvk): do binary search instead of linear search. |
2576 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. | |
a49c164a DE |
2577 | firstIdx = null; |
2578 | lastIdx = null; | |
2579 | for (sampleIdx = 0; sampleIdx < series.length; sampleIdx++) { | |
2580 | if (series[sampleIdx][0] >= low && firstIdx === null) { | |
2581 | firstIdx = sampleIdx; | |
1a26f3fb | 2582 | } |
a49c164a DE |
2583 | if (series[sampleIdx][0] <= high) { |
2584 | lastIdx = sampleIdx; | |
6a1aa64f DV |
2585 | } |
2586 | } | |
4e59e63e | 2587 | |
1a26f3fb | 2588 | if (firstIdx === null) firstIdx = 0; |
14ac984e | 2589 | var correctedFirstIdx = firstIdx; |
b0375a28 | 2590 | var isInvalidValue = true; |
4e59e63e | 2591 | while (isInvalidValue && correctedFirstIdx > 0) { |
14ac984e | 2592 | correctedFirstIdx--; |
a49c164a DE |
2593 | // check if the y value is null. |
2594 | isInvalidValue = series[correctedFirstIdx][1] === null; | |
14ac984e | 2595 | } |
4e59e63e | 2596 | |
1a26f3fb | 2597 | if (lastIdx === null) lastIdx = series.length - 1; |
14ac984e | 2598 | var correctedLastIdx = lastIdx; |
b0375a28 | 2599 | isInvalidValue = true; |
4e59e63e | 2600 | while (isInvalidValue && correctedLastIdx < series.length - 1) { |
14ac984e | 2601 | correctedLastIdx++; |
a49c164a | 2602 | isInvalidValue = series[correctedLastIdx][1] === null; |
14ac984e | 2603 | } |
4e59e63e | 2604 | |
4e59e63e | 2605 | if (correctedFirstIdx!==firstIdx) { |
30a5cfc6 | 2606 | firstIdx = correctedFirstIdx; |
6a1aa64f | 2607 | } |
4e59e63e | 2608 | if (correctedLastIdx !== lastIdx) { |
30a5cfc6 | 2609 | lastIdx = correctedLastIdx; |
4e59e63e | 2610 | } |
55231c07 | 2611 | |
a49c164a | 2612 | boundaryIds[seriesIdx-1] = [firstIdx, lastIdx]; |
55231c07 | 2613 | |
30a5cfc6 KW |
2614 | // .slice's end is exclusive, we want to include lastIdx. |
2615 | series = series.slice(firstIdx, lastIdx + 1); | |
16269f6e | 2616 | } else { |
a49c164a DE |
2617 | series = rolledSeries[seriesIdx]; |
2618 | boundaryIds[seriesIdx-1] = [0, series.length-1]; | |
6a1aa64f DV |
2619 | } |
2620 | ||
a49c164a DE |
2621 | var seriesName = this.attr_("labels")[seriesIdx]; |
2622 | var seriesExtremes = this.dataHandler_.getExtremeYValues(series, | |
b0963cdb | 2623 | dateWindow, this.getBooleanOption("stepPlot",seriesName)); |
5011e7a1 | 2624 | |
a49c164a DE |
2625 | var seriesPoints = this.dataHandler_.seriesToPoints(series, |
2626 | seriesName, boundaryIds[seriesIdx-1][0]); | |
43af96e7 | 2627 | |
b0963cdb | 2628 | if (this.getBooleanOption("stackedGraph")) { |
8b5f1691 JJS |
2629 | axisIdx = this.attributes_.axisForSeries(seriesName); |
2630 | if (cumulativeYval[axisIdx] === undefined) { | |
2631 | cumulativeYval[axisIdx] = []; | |
2632 | } | |
2633 | Dygraph.stackPoints_(seriesPoints, cumulativeYval[axisIdx], seriesExtremes, | |
b0963cdb | 2634 | this.getBooleanOption("stackedGraphNaNFill")); |
6a1aa64f | 2635 | } |
354e15ab | 2636 | |
b1a3b195 | 2637 | extremes[seriesName] = seriesExtremes; |
a49c164a | 2638 | points[seriesIdx] = seriesPoints; |
7d463f49 KW |
2639 | } |
2640 | ||
30a5cfc6 | 2641 | return { points: points, extremes: extremes, boundaryIds: boundaryIds }; |
b1a3b195 DV |
2642 | }; |
2643 | ||
2644 | /** | |
2645 | * Update the graph with new data. This method is called when the viewing area | |
2646 | * has changed. If the underlying data or options have changed, predraw_ will | |
2647 | * be called before drawGraph_ is called. | |
2648 | * | |
b1a3b195 DV |
2649 | * @private |
2650 | */ | |
e2c21500 | 2651 | Dygraph.prototype.drawGraph_ = function() { |
b1a3b195 DV |
2652 | var start = new Date(); |
2653 | ||
b1a3b195 DV |
2654 | // This is used to set the second parameter to drawCallback, below. |
2655 | var is_initial_draw = this.is_initial_draw_; | |
2656 | this.is_initial_draw_ = false; | |
2657 | ||
b1a3b195 DV |
2658 | this.layout_.removeAllDatasets(); |
2659 | this.setColors_(); | |
b0963cdb | 2660 | this.attrs_.pointSize = 0.5 * this.getNumericOption('highlightCircleSize'); |
b1a3b195 DV |
2661 | |
2662 | var packed = this.gatherDatasets_(this.rolledSeries_, this.dateWindow_); | |
30a5cfc6 KW |
2663 | var points = packed.points; |
2664 | var extremes = packed.extremes; | |
2665 | this.boundaryIds_ = packed.boundaryIds; | |
b1a3b195 | 2666 | |
82c6fe4d KW |
2667 | this.setIndexByName_ = {}; |
2668 | var labels = this.attr_("labels"); | |
2669 | if (labels.length > 0) { | |
2670 | this.setIndexByName_[labels[0]] = 0; | |
2671 | } | |
857a6931 | 2672 | var dataIdx = 0; |
30a5cfc6 | 2673 | for (var i = 1; i < points.length; i++) { |
82c6fe4d | 2674 | this.setIndexByName_[labels[i]] = i; |
4523c1f6 | 2675 | if (!this.visibility()[i - 1]) continue; |
30a5cfc6 | 2676 | this.layout_.addDataset(labels[i], points[i]); |
857a6931 | 2677 | this.datasetIndex_[i] = dataIdx++; |
43af96e7 NK |
2678 | } |
2679 | ||
6faebb69 | 2680 | this.computeYAxisRanges_(extremes); |
b2c9222a DV |
2681 | this.layout_.setYAxes(this.axes_); |
2682 | ||
6a1aa64f DV |
2683 | this.addXTicks_(); |
2684 | ||
b2c9222a | 2685 | // Save the X axis zoomed status as the updateOptions call will tend to set it erroneously |
81856f70 | 2686 | var tmp_zoomed_x = this.zoomed_x_; |
6a1aa64f | 2687 | // Tell PlotKit to use this new data and render itself |
81856f70 | 2688 | this.zoomed_x_ = tmp_zoomed_x; |
30a5cfc6 | 2689 | this.layout_.evaluate(); |
e2c21500 | 2690 | this.renderGraph_(is_initial_draw); |
9ca829f2 | 2691 | |
b0963cdb | 2692 | if (this.getStringOption("timingName")) { |
9ca829f2 | 2693 | var end = new Date(); |
8a68db7d | 2694 | console.log(this.getStringOption("timingName") + " - drawGraph: " + (end - start) + "ms"); |
9ca829f2 DV |
2695 | } |
2696 | }; | |
2697 | ||
e2c21500 DV |
2698 | /** |
2699 | * This does the work of drawing the chart. It assumes that the layout and axis | |
2700 | * scales have already been set (e.g. by predraw_). | |
2701 | * | |
2702 | * @private | |
2703 | */ | |
2704 | Dygraph.prototype.renderGraph_ = function(is_initial_draw) { | |
1748a51c | 2705 | this.cascadeEvents_('clearChart'); |
6a1aa64f | 2706 | this.plotter_.clear(); |
f417e3d3 | 2707 | |
b0963cdb | 2708 | if (this.getFunctionOption('underlayCallback')) { |
98eb4713 DV |
2709 | // NOTE: we pass the dygraph object to this callback twice to avoid breaking |
2710 | // users who expect a deprecated form of this callback. | |
4ee251cb | 2711 | this.getFunctionOption('underlayCallback').call(this, |
98eb4713 DV |
2712 | this.hidden_ctx_, this.layout_.getPlotArea(), this, this); |
2713 | } | |
2714 | ||
2715 | var e = { | |
189f8030 | 2716 | canvas: this.hidden_, |
2de7166c | 2717 | drawingContext: this.hidden_ctx_ |
98eb4713 DV |
2718 | }; |
2719 | this.cascadeEvents_('willDrawChart', e); | |
6a1aa64f | 2720 | this.plotter_.render(); |
98eb4713 | 2721 | this.cascadeEvents_('didDrawChart', e); |
fa11f4e4 | 2722 | this.lastRow_ = -1; // because plugins/legend.js clears the legend |
8cfe592f DV |
2723 | |
2724 | // TODO(danvk): is this a performance bottleneck when panning? | |
2725 | // The interaction canvas should already be empty in that situation. | |
7c39bb3a | 2726 | this.canvas_.getContext('2d').clearRect(0, 0, this.width_, this.height_); |
599fb4ad | 2727 | |
b0963cdb DV |
2728 | if (this.getFunctionOption("drawCallback") !== null) { |
2729 | this.getFunctionOption("drawCallback")(this, is_initial_draw); | |
599fb4ad | 2730 | } |
5bcc58b4 DV |
2731 | if (is_initial_draw) { |
2732 | this.readyFired_ = true; | |
2733 | while (this.readyFns_.length > 0) { | |
2734 | var fn = this.readyFns_.pop(); | |
2735 | fn(this); | |
2736 | } | |
2737 | } | |
6a1aa64f DV |
2738 | }; |
2739 | ||
2740 | /** | |
629a09ae | 2741 | * @private |
26ca7938 DV |
2742 | * Determine properties of the y-axes which are independent of the data |
2743 | * currently being displayed. This includes things like the number of axes and | |
2744 | * the style of the axes. It does not include the range of each axis and its | |
2745 | * tick marks. | |
16f00742 | 2746 | * This fills in this.axes_. |
26ca7938 | 2747 | * axes_ = [ { options } ] |
26ca7938 | 2748 | * indices are into the axes_ array. |
f09fc545 | 2749 | */ |
26ca7938 | 2750 | Dygraph.prototype.computeYAxes_ = function() { |
d64b8fea RK |
2751 | // Preserve valueWindow settings if they exist, and if the user hasn't |
2752 | // specified a new valueRange. | |
0cd1ad15 | 2753 | var valueWindows, axis, index, opts, v; |
758a629f | 2754 | if (this.axes_ !== undefined && this.user_attrs_.hasOwnProperty("valueRange") === false) { |
d64b8fea | 2755 | valueWindows = []; |
758a629f | 2756 | for (index = 0; index < this.axes_.length; index++) { |
d64b8fea RK |
2757 | valueWindows.push(this.axes_[index].valueWindow); |
2758 | } | |
2759 | } | |
2760 | ||
6ad8b6a4 RK |
2761 | // this.axes_ doesn't match this.attributes_.axes_.options. It's used for |
2762 | // data computation as well as options storage. | |
f09fc545 | 2763 | // Go through once and add all the axes. |
02c93ff5 | 2764 | this.axes_ = []; |
0d216a60 | 2765 | |
02c93ff5 | 2766 | for (axis = 0; axis < this.attributes_.numAxes(); axis++) { |
6ad8b6a4 | 2767 | // Add a new axis, making a copy of its per-axis options. |
02c93ff5 | 2768 | opts = { g : this }; |
6ad8b6a4 RK |
2769 | Dygraph.update(opts, this.attributes_.axisOptions(axis)); |
2770 | this.axes_[axis] = opts; | |
f09fc545 | 2771 | } |
1c77a3a1 | 2772 | |
7740dd00 RK |
2773 | |
2774 | // Copy global valueRange option over to the first axis. | |
2775 | // NOTE(konigsberg): Are these two statements necessary? | |
2776 | // I tried removing it. The automated tests pass, and manually | |
2777 | // messing with tests/zoom.html showed no trouble. | |
2778 | v = this.attr_('valueRange'); | |
2779 | if (v) this.axes_[0].valueRange = v; | |
478b866b | 2780 | |
758a629f | 2781 | if (valueWindows !== undefined) { |
d64b8fea | 2782 | // Restore valueWindow settings. |
4ecb55b5 RK |
2783 | |
2784 | // When going from two axes back to one, we only restore | |
2785 | // one axis. | |
2786 | var idxCount = Math.min(valueWindows.length, this.axes_.length); | |
2787 | ||
2788 | for (index = 0; index < idxCount; index++) { | |
d64b8fea RK |
2789 | this.axes_[index].valueWindow = valueWindows[index]; |
2790 | } | |
2791 | } | |
4dd0ac55 | 2792 | |
4dd0ac55 RV |
2793 | for (axis = 0; axis < this.axes_.length; axis++) { |
2794 | if (axis === 0) { | |
2795 | opts = this.optionsViewForAxis_('y' + (axis ? '2' : '')); | |
2796 | v = opts("valueRange"); | |
2797 | if (v) this.axes_[axis].valueRange = v; | |
2798 | } else { // To keep old behavior | |
2799 | var axes = this.user_attrs_.axes; | |
2800 | if (axes && axes.y2) { | |
2801 | v = axes.y2.valueRange; | |
2802 | if (v) this.axes_[axis].valueRange = v; | |
2803 | } | |
2804 | } | |
2805 | } | |
26ca7938 DV |
2806 | }; |
2807 | ||
2808 | /** | |
2809 | * Returns the number of y-axes on the chart. | |
1bc88216 | 2810 | * @return {number} the number of axes. |
26ca7938 DV |
2811 | */ |
2812 | Dygraph.prototype.numAxes = function() { | |
16f00742 | 2813 | return this.attributes_.numAxes(); |
26ca7938 DV |
2814 | }; |
2815 | ||
2816 | /** | |
629a09ae | 2817 | * @private |
b2c9222a | 2818 | * Returns axis properties for the given series. |
1bc88216 | 2819 | * @param {string} setName The name of the series for which to get axis |
b2c9222a | 2820 | * properties, e.g. 'Y1'. |
1bc88216 | 2821 | * @return {Object} The axis properties. |
b2c9222a DV |
2822 | */ |
2823 | Dygraph.prototype.axisPropertiesForSeries = function(series) { | |
2824 | // TODO(danvk): handle errors. | |
16f00742 | 2825 | return this.axes_[this.attributes_.axisForSeries(series)]; |
b2c9222a DV |
2826 | }; |
2827 | ||
2828 | /** | |
2829 | * @private | |
26ca7938 DV |
2830 | * Determine the value range and tick marks for each axis. |
2831 | * @param {Object} extremes A mapping from seriesName -> [low, high] | |
2832 | * This fills in the valueRange and ticks fields in each entry of this.axes_. | |
2833 | */ | |
2834 | Dygraph.prototype.computeYAxisRanges_ = function(extremes) { | |
9adc2c33 | 2835 | var isNullUndefinedOrNaN = function(num) { |
126bf1e3 | 2836 | return isNaN(parseFloat(num)); |
6b05851c | 2837 | }; |
16f00742 | 2838 | var numAxes = this.attributes_.numAxes(); |
4bac38d8 | 2839 | var ypadCompat, span, series, ypad; |
9e906ae6 DE |
2840 | |
2841 | var p_axis; | |
f09fc545 DV |
2842 | |
2843 | // Compute extreme values, a span and tick marks for each axis. | |
16f00742 | 2844 | for (var i = 0; i < numAxes; i++) { |
26ca7938 | 2845 | var axis = this.axes_[i]; |
ec40f67c RK |
2846 | var logscale = this.attributes_.getForAxis("logscale", i); |
2847 | var includeZero = this.attributes_.getForAxis("includeZero", i); | |
9e906ae6 | 2848 | var independentTicks = this.attributes_.getForAxis("independentTicks", i); |
6ad8b6a4 RK |
2849 | series = this.attributes_.seriesForAxis(i); |
2850 | ||
31a8d0cd | 2851 | // Add some padding. This supports two Y padding operation modes: |
2852 | // | |
2853 | // - backwards compatible (yRangePad not set): | |
2854 | // 10% padding for automatic Y ranges, but not for user-supplied | |
2855 | // ranges, and move a close-to-zero edge to zero except if | |
2856 | // avoidMinZero is set, since drawing at the edge results in | |
2857 | // invisible lines. Unfortunately lines drawn at the edge of a | |
2858 | // user-supplied range will still be invisible. If logscale is | |
2859 | // set, add a variable amount of padding at the top but | |
2860 | // none at the bottom. | |
2861 | // | |
2862 | // - new-style (yRangePad set by the user): | |
2863 | // always add the specified Y padding. | |
2864 | // | |
2865 | ypadCompat = true; | |
2866 | ypad = 0.1; // add 10% | |
b0963cdb | 2867 | if (this.getNumericOption('yRangePad') !== null) { |
31a8d0cd | 2868 | ypadCompat = false; |
2869 | // Convert pixel padding to ratio | |
b0963cdb | 2870 | ypad = this.getNumericOption('yRangePad') / this.plotter_.area.h; |
31a8d0cd | 2871 | } |
2872 | ||
83b0c192 | 2873 | if (series.length === 0) { |
06fc69b6 AV |
2874 | // If no series are defined or visible then use a reasonable default |
2875 | axis.extremeRange = [0, 1]; | |
2876 | } else { | |
1c77a3a1 | 2877 | // Calculate the extremes of extremes. |
f09fc545 DV |
2878 | var minY = Infinity; // extremes[series[0]][0]; |
2879 | var maxY = -Infinity; // extremes[series[0]][1]; | |
ba049b89 | 2880 | var extremeMinY, extremeMaxY; |
a2da3777 | 2881 | |
f09fc545 | 2882 | for (var j = 0; j < series.length; j++) { |
a2da3777 DV |
2883 | // this skips invisible series |
2884 | if (!extremes.hasOwnProperty(series[j])) continue; | |
2885 | ||
ba049b89 NN |
2886 | // Only use valid extremes to stop null data series' from corrupting the scale. |
2887 | extremeMinY = extremes[series[j]][0]; | |
758a629f | 2888 | if (extremeMinY !== null) { |
36dfa958 | 2889 | minY = Math.min(extremeMinY, minY); |
ba049b89 NN |
2890 | } |
2891 | extremeMaxY = extremes[series[j]][1]; | |
758a629f | 2892 | if (extremeMaxY !== null) { |
36dfa958 | 2893 | maxY = Math.max(extremeMaxY, maxY); |
ba049b89 | 2894 | } |
f09fc545 | 2895 | } |
fa460473 KW |
2896 | |
2897 | // Include zero if requested by the user. | |
2898 | if (includeZero && !logscale) { | |
2899 | if (minY > 0) minY = 0; | |
2900 | if (maxY < 0) maxY = 0; | |
2901 | } | |
f09fc545 | 2902 | |
a2da3777 | 2903 | // Ensure we have a valid scale, otherwise default to [0, 1] for safety. |
36dfa958 | 2904 | if (minY == Infinity) minY = 0; |
a2da3777 | 2905 | if (maxY == -Infinity) maxY = 1; |
ba049b89 | 2906 | |
4bac38d8 | 2907 | span = maxY - minY; |
fa460473 KW |
2908 | // special case: if we have no sense of scale, center on the sole value. |
2909 | if (span === 0) { | |
2910 | if (maxY !== 0) { | |
2911 | span = Math.abs(maxY); | |
2912 | } else { | |
2913 | // ... and if the sole value is zero, use range 0-1. | |
2914 | maxY = 1; | |
2915 | span = 1; | |
2916 | } | |
2917 | } | |
2918 | ||
758a629f | 2919 | var maxAxisY, minAxisY; |
ec40f67c | 2920 | if (logscale) { |
fa460473 KW |
2921 | if (ypadCompat) { |
2922 | maxAxisY = maxY + ypad * span; | |
2923 | minAxisY = minY; | |
2924 | } else { | |
2925 | var logpad = Math.exp(Math.log(span) * ypad); | |
2926 | maxAxisY = maxY * logpad; | |
2927 | minAxisY = minY / logpad; | |
2928 | } | |
ff022deb | 2929 | } else { |
fa460473 KW |
2930 | maxAxisY = maxY + ypad * span; |
2931 | minAxisY = minY - ypad * span; | |
f09fc545 | 2932 | |
fa460473 KW |
2933 | // Backwards-compatible behavior: Move the span to start or end at zero if it's |
2934 | // close to zero, but not if avoidMinZero is set. | |
b0963cdb | 2935 | if (ypadCompat && !this.getBooleanOption("avoidMinZero")) { |
ff022deb RK |
2936 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; |
2937 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
2938 | } | |
f09fc545 | 2939 | } |
4cac8c7a RK |
2940 | axis.extremeRange = [minAxisY, maxAxisY]; |
2941 | } | |
2942 | if (axis.valueWindow) { | |
2943 | // This is only set if the user has zoomed on the y-axis. It is never set | |
2944 | // by a user. It takes precedence over axis.valueRange because, if you set | |
2945 | // valueRange, you'd still expect to be able to pan. | |
2946 | axis.computedValueRange = [axis.valueWindow[0], axis.valueWindow[1]]; | |
2947 | } else if (axis.valueRange) { | |
2948 | // This is a user-set value range for this axis. | |
fa460473 KW |
2949 | var y0 = isNullUndefinedOrNaN(axis.valueRange[0]) ? axis.extremeRange[0] : axis.valueRange[0]; |
2950 | var y1 = isNullUndefinedOrNaN(axis.valueRange[1]) ? axis.extremeRange[1] : axis.valueRange[1]; | |
2951 | if (!ypadCompat) { | |
2952 | if (axis.logscale) { | |
2953 | var logpad = Math.exp(Math.log(span) * ypad); | |
2954 | y0 *= logpad; | |
2955 | y1 /= logpad; | |
2956 | } else { | |
4bac38d8 | 2957 | span = y1 - y0; |
fa460473 KW |
2958 | y0 -= span * ypad; |
2959 | y1 += span * ypad; | |
2960 | } | |
2961 | } | |
2962 | axis.computedValueRange = [y0, y1]; | |
4cac8c7a RK |
2963 | } else { |
2964 | axis.computedValueRange = axis.extremeRange; | |
f09fc545 | 2965 | } |
9e906ae6 DE |
2966 | |
2967 | ||
383d8473 | 2968 | if (independentTicks) { |
9e906ae6 DE |
2969 | axis.independentTicks = independentTicks; |
2970 | var opts = this.optionsViewForAxis_('y' + (i ? '2' : '')); | |
2971 | var ticker = opts('ticker'); | |
48e614ac | 2972 | axis.ticks = ticker(axis.computedValueRange[0], |
9e906ae6 DE |
2973 | axis.computedValueRange[1], |
2974 | this.height_, // TODO(danvk): should be area.height | |
2975 | opts, | |
2976 | this); | |
6c5f8774 | 2977 | // Define the first independent axis as primary axis. |
e8b3c7b4 | 2978 | if (!p_axis) p_axis = axis; |
9e906ae6 DE |
2979 | } |
2980 | } | |
e8b3c7b4 | 2981 | if (p_axis === undefined) { |
eba6dd23 | 2982 | throw ("Configuration Error: At least one axis has to have the \"independentTicks\" option activated."); |
e8b3c7b4 | 2983 | } |
9e906ae6 DE |
2984 | // Add ticks. By default, all axes inherit the tick positions of the |
2985 | // primary axis. However, if an axis is specifically marked as having | |
2986 | // independent ticks, then that is permissible as well. | |
2987 | for (var i = 0; i < numAxes; i++) { | |
2988 | var axis = this.axes_[i]; | |
2989 | ||
2990 | if (!axis.independentTicks) { | |
2991 | var opts = this.optionsViewForAxis_('y' + (i ? '2' : '')); | |
2992 | var ticker = opts('ticker'); | |
0d64e596 DV |
2993 | var p_ticks = p_axis.ticks; |
2994 | var p_scale = p_axis.computedValueRange[1] - p_axis.computedValueRange[0]; | |
2995 | var scale = axis.computedValueRange[1] - axis.computedValueRange[0]; | |
2996 | var tick_values = []; | |
25f76ae3 DV |
2997 | for (var k = 0; k < p_ticks.length; k++) { |
2998 | var y_frac = (p_ticks[k].v - p_axis.computedValueRange[0]) / p_scale; | |
0d64e596 DV |
2999 | var y_val = axis.computedValueRange[0] + y_frac * scale; |
3000 | tick_values.push(y_val); | |
3001 | } | |
3002 | ||
48e614ac DV |
3003 | axis.ticks = ticker(axis.computedValueRange[0], |
3004 | axis.computedValueRange[1], | |
3005 | this.height_, // TODO(danvk): should be area.height | |
3006 | opts, | |
3007 | this, | |
3008 | tick_values); | |
0d64e596 | 3009 | } |
34fc91d4 | 3010 | } |
f09fc545 | 3011 | }; |
25f76ae3 | 3012 | |
f09fc545 | 3013 | /** |
285a6bda DV |
3014 | * Detects the type of the str (date or numeric) and sets the various |
3015 | * formatting attributes in this.attrs_ based on this type. | |
1bc88216 | 3016 | * @param {string} str An x value. |
285a6bda DV |
3017 | * @private |
3018 | */ | |
3019 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
3020 | var isDate = false; | |
0842b24b DV |
3021 | var dashPos = str.indexOf('-'); // could be 2006-01-01 _or_ 1.0e-2 |
3022 | if ((dashPos > 0 && (str[dashPos-1] != 'e' && str[dashPos-1] != 'E')) || | |
285a6bda DV |
3023 | str.indexOf('/') >= 0 || |
3024 | isNaN(parseFloat(str))) { | |
3025 | isDate = true; | |
3026 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
3027 | // TODO(danvk): remove support for this format. | |
3028 | isDate = true; | |
3029 | } | |
3030 | ||
a716aff2 RK |
3031 | this.setXAxisOptions_(isDate); |
3032 | }; | |
3033 | ||
3034 | Dygraph.prototype.setXAxisOptions_ = function(isDate) { | |
285a6bda | 3035 | if (isDate) { |
285a6bda | 3036 | this.attrs_.xValueParser = Dygraph.dateParser; |
872a6a00 | 3037 | this.attrs_.axes.x.valueFormatter = Dygraph.dateValueFormatter; |
48e614ac | 3038 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; |
872a6a00 | 3039 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisLabelFormatter; |
285a6bda | 3040 | } else { |
c39e1d93 | 3041 | /** @private (shut up, jsdoc!) */ |
285a6bda | 3042 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
48e614ac DV |
3043 | // TODO(danvk): use Dygraph.numberValueFormatter here? |
3044 | /** @private (shut up, jsdoc!) */ | |
3045 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; | |
5b9b2142 | 3046 | this.attrs_.axes.x.ticker = Dygraph.numericTicks; |
48e614ac | 3047 | this.attrs_.axes.x.axisLabelFormatter = this.attrs_.axes.x.valueFormatter; |
6a1aa64f | 3048 | } |
83b0c192 | 3049 | }; |
6a1aa64f DV |
3050 | |
3051 | /** | |
629a09ae | 3052 | * @private |
6a1aa64f DV |
3053 | * Parses a string in a special csv format. We expect a csv file where each |
3054 | * line is a date point, and the first field in each line is the date string. | |
3055 | * We also expect that all remaining fields represent series. | |
285a6bda | 3056 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f | 3057 | * date, series1, stddev1, series2, stddev2, ... |
629a09ae | 3058 | * @param {[Object]} data See above. |
285a6bda | 3059 | * |
629a09ae | 3060 | * @return [Object] An array with one entry for each row. These entries |
285a6bda DV |
3061 | * are an array of cells in that row. The first entry is the parsed x-value for |
3062 | * the row. The second, third, etc. are the y-values. These can take on one of | |
3063 | * three forms, depending on the CSV and constructor parameters: | |
3064 | * 1. numeric value | |
3065 | * 2. [ value, stddev ] | |
3066 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 3067 | */ |
285a6bda | 3068 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f | 3069 | var ret = []; |
e5763589 DV |
3070 | var line_delimiter = Dygraph.detectLineDelimiter(data); |
3071 | var lines = data.split(line_delimiter || "\n"); | |
758a629f | 3072 | var vals, j; |
3d67f03b DV |
3073 | |
3074 | // Use the default delimiter or fall back to a tab if that makes sense. | |
b0963cdb | 3075 | var delim = this.getStringOption('delimiter'); |
3d67f03b DV |
3076 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { |
3077 | delim = '\t'; | |
3078 | } | |
3079 | ||
285a6bda | 3080 | var start = 0; |
d7beab6b DV |
3081 | if (!('labels' in this.user_attrs_)) { |
3082 | // User hasn't explicitly set labels, so they're (presumably) in the CSV. | |
285a6bda | 3083 | start = 1; |
d7beab6b | 3084 | this.attrs_.labels = lines[0].split(delim); // NOTE: _not_ user_attrs_. |
34825ef5 | 3085 | this.attributes_.reparseSeries(); |
6a1aa64f | 3086 | } |
5cd7ac68 | 3087 | var line_no = 0; |
03b522a4 | 3088 | |
285a6bda DV |
3089 | var xParser; |
3090 | var defaultParserSet = false; // attempt to auto-detect x value type | |
3091 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 3092 | var outOfOrder = false; |
6a1aa64f DV |
3093 | for (var i = start; i < lines.length; i++) { |
3094 | var line = lines[i]; | |
5cd7ac68 | 3095 | line_no = i; |
758a629f | 3096 | if (line.length === 0) continue; // skip blank lines |
3d67f03b DV |
3097 | if (line[0] == '#') continue; // skip comment lines |
3098 | var inFields = line.split(delim); | |
285a6bda | 3099 | if (inFields.length < 2) continue; |
6a1aa64f DV |
3100 | |
3101 | var fields = []; | |
285a6bda DV |
3102 | if (!defaultParserSet) { |
3103 | this.detectTypeFromString_(inFields[0]); | |
b0963cdb | 3104 | xParser = this.getFunctionOption("xValueParser"); |
285a6bda DV |
3105 | defaultParserSet = true; |
3106 | } | |
3107 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
3108 | |
3109 | // If fractions are expected, parse the numbers as "A/B" | |
3110 | if (this.fractions_) { | |
758a629f | 3111 | for (j = 1; j < inFields.length; j++) { |
6a1aa64f | 3112 | // TODO(danvk): figure out an appropriate way to flag parse errors. |
758a629f | 3113 | vals = inFields[j].split("/"); |
7219edb3 | 3114 | if (vals.length != 2) { |
8a68db7d | 3115 | console.error('Expected fractional "num/den" values in CSV data ' + |
464b5f50 DV |
3116 | "but found a value '" + inFields[j] + "' on line " + |
3117 | (1 + i) + " ('" + line + "') which is not of this form."); | |
7219edb3 DV |
3118 | fields[j] = [0, 0]; |
3119 | } else { | |
55deb02f DV |
3120 | fields[j] = [Dygraph.parseFloat_(vals[0], i, line), |
3121 | Dygraph.parseFloat_(vals[1], i, line)]; | |
7219edb3 | 3122 | } |
6a1aa64f | 3123 | } |
b0963cdb | 3124 | } else if (this.getBooleanOption("errorBars")) { |
6a1aa64f | 3125 | // If there are error bars, values are (value, stddev) pairs |
7219edb3 | 3126 | if (inFields.length % 2 != 1) { |
8a68db7d | 3127 | console.error('Expected alternating (value, stdev.) pairs in CSV data ' + |
464b5f50 DV |
3128 | 'but line ' + (1 + i) + ' has an odd number of values (' + |
3129 | (inFields.length - 1) + "): '" + line + "'"); | |
7219edb3 | 3130 | } |
758a629f | 3131 | for (j = 1; j < inFields.length; j += 2) { |
55deb02f DV |
3132 | fields[(j + 1) / 2] = [Dygraph.parseFloat_(inFields[j], i, line), |
3133 | Dygraph.parseFloat_(inFields[j + 1], i, line)]; | |
7219edb3 | 3134 | } |
b0963cdb | 3135 | } else if (this.getBooleanOption("customBars")) { |
6a1aa64f | 3136 | // Bars are a low;center;high tuple |
758a629f | 3137 | for (j = 1; j < inFields.length; j++) { |
327a9279 DV |
3138 | var val = inFields[j]; |
3139 | if (/^ *$/.test(val)) { | |
3140 | fields[j] = [null, null, null]; | |
3141 | } else { | |
758a629f | 3142 | vals = val.split(";"); |
327a9279 | 3143 | if (vals.length == 3) { |
55deb02f DV |
3144 | fields[j] = [ Dygraph.parseFloat_(vals[0], i, line), |
3145 | Dygraph.parseFloat_(vals[1], i, line), | |
3146 | Dygraph.parseFloat_(vals[2], i, line) ]; | |
327a9279 | 3147 | } else { |
8a68db7d | 3148 | console.warn('When using customBars, values must be either blank ' + |
464b5f50 DV |
3149 | 'or "low;center;high" tuples (got "' + val + |
3150 | '" on line ' + (1+i)); | |
327a9279 DV |
3151 | } |
3152 | } | |
6a1aa64f DV |
3153 | } |
3154 | } else { | |
3155 | // Values are just numbers | |
758a629f | 3156 | for (j = 1; j < inFields.length; j++) { |
55deb02f | 3157 | fields[j] = Dygraph.parseFloat_(inFields[j], i, line); |
285a6bda | 3158 | } |
6a1aa64f | 3159 | } |
987840a2 DV |
3160 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
3161 | outOfOrder = true; | |
3162 | } | |
285a6bda DV |
3163 | |
3164 | if (fields.length != expectedCols) { | |
8a68db7d | 3165 | console.error("Number of columns in line " + i + " (" + fields.length + |
464b5f50 DV |
3166 | ") does not agree with number of labels (" + expectedCols + |
3167 | ") " + line); | |
285a6bda | 3168 | } |
6d0aaa09 DV |
3169 | |
3170 | // If the user specified the 'labels' option and none of the cells of the | |
3171 | // first row parsed correctly, then they probably double-specified the | |
3172 | // labels. We go with the values set in the option, discard this row and | |
3173 | // log a warning to the JS console. | |
758a629f | 3174 | if (i === 0 && this.attr_('labels')) { |
6d0aaa09 | 3175 | var all_null = true; |
758a629f | 3176 | for (j = 0; all_null && j < fields.length; j++) { |
6d0aaa09 DV |
3177 | if (fields[j]) all_null = false; |
3178 | } | |
3179 | if (all_null) { | |
8a68db7d | 3180 | console.warn("The dygraphs 'labels' option is set, but the first row " + |
464b5f50 DV |
3181 | "of CSV data ('" + line + "') appears to also contain " + |
3182 | "labels. Will drop the CSV labels and use the option " + | |
3183 | "labels."); | |
6d0aaa09 DV |
3184 | continue; |
3185 | } | |
3186 | } | |
3187 | ret.push(fields); | |
6a1aa64f | 3188 | } |
987840a2 DV |
3189 | |
3190 | if (outOfOrder) { | |
8a68db7d | 3191 | console.warn("CSV is out of order; order it correctly to speed loading."); |
758a629f | 3192 | ret.sort(function(a,b) { return a[0] - b[0]; }); |
987840a2 DV |
3193 | } |
3194 | ||
6a1aa64f DV |
3195 | return ret; |
3196 | }; | |
3197 | ||
3198 | /** | |
285a6bda DV |
3199 | * The user has provided their data as a pre-packaged JS array. If the x values |
3200 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
3201 | * are dates, we need to convert them from Date objects to ms since epoch. | |
8ef9d44d DV |
3202 | * @param {!Array} data |
3203 | * @return {Object} data with numeric x values. | |
3204 | * @private | |
285a6bda DV |
3205 | */ |
3206 | Dygraph.prototype.parseArray_ = function(data) { | |
3207 | // Peek at the first x value to see if it's numeric. | |
758a629f | 3208 | if (data.length === 0) { |
8a68db7d | 3209 | console.error("Can't plot empty data set"); |
285a6bda DV |
3210 | return null; |
3211 | } | |
758a629f | 3212 | if (data[0].length === 0) { |
8a68db7d | 3213 | console.error("Data set cannot contain an empty row"); |
285a6bda DV |
3214 | return null; |
3215 | } | |
3216 | ||
758a629f DV |
3217 | var i; |
3218 | if (this.attr_("labels") === null) { | |
8a68db7d | 3219 | console.warn("Using default labels. Set labels explicitly via 'labels' " + |
464b5f50 | 3220 | "in the options parameter"); |
285a6bda | 3221 | this.attrs_.labels = [ "X" ]; |
758a629f | 3222 | for (i = 1; i < data[0].length; i++) { |
77812e0e | 3223 | this.attrs_.labels.push("Y" + i); // Not user_attrs_. |
285a6bda | 3224 | } |
77812e0e | 3225 | this.attributes_.reparseSeries(); |
debdb88d DV |
3226 | } else { |
3227 | var num_labels = this.attr_("labels"); | |
3228 | if (num_labels.length != data[0].length) { | |
8a68db7d | 3229 | console.error("Mismatch between number of labels (" + num_labels + ")" + |
464b5f50 | 3230 | " and number of columns in array (" + data[0].length + ")"); |
debdb88d DV |
3231 | return null; |
3232 | } | |
285a6bda DV |
3233 | } |
3234 | ||
2dda3850 | 3235 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda | 3236 | // Some intelligent defaults for a date x-axis. |
872a6a00 | 3237 | this.attrs_.axes.x.valueFormatter = Dygraph.dateValueFormatter; |
48e614ac | 3238 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; |
872a6a00 | 3239 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisLabelFormatter; |
285a6bda DV |
3240 | |
3241 | // Assume they're all dates. | |
e3ab7b40 | 3242 | var parsedData = Dygraph.clone(data); |
758a629f DV |
3243 | for (i = 0; i < data.length; i++) { |
3244 | if (parsedData[i].length === 0) { | |
8a68db7d | 3245 | console.error("Row " + (1 + i) + " of data is empty"); |
285a6bda DV |
3246 | return null; |
3247 | } | |
758a629f DV |
3248 | if (parsedData[i][0] === null || |
3249 | typeof(parsedData[i][0].getTime) != 'function' || | |
3250 | isNaN(parsedData[i][0].getTime())) { | |
8a68db7d | 3251 | console.error("x value in row " + (1 + i) + " is not a Date"); |
285a6bda DV |
3252 | return null; |
3253 | } | |
3254 | parsedData[i][0] = parsedData[i][0].getTime(); | |
3255 | } | |
3256 | return parsedData; | |
3257 | } else { | |
3258 | // Some intelligent defaults for a numeric x-axis. | |
c39e1d93 | 3259 | /** @private (shut up, jsdoc!) */ |
48e614ac | 3260 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; |
5b9b2142 | 3261 | this.attrs_.axes.x.ticker = Dygraph.numericTicks; |
a716aff2 | 3262 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.numberAxisLabelFormatter; |
285a6bda DV |
3263 | return data; |
3264 | } | |
3265 | }; | |
3266 | ||
3267 | /** | |
79420a1e DV |
3268 | * Parses a DataTable object from gviz. |
3269 | * The data is expected to have a first column that is either a date or a | |
3270 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
3271 | * between this.xValueParser_ and the type of the first column, it will be | |
a685723c | 3272 | * fixed. Fills out rawData_. |
1bc88216 | 3273 | * @param {!google.visualization.DataTable} data See above. |
79420a1e DV |
3274 | * @private |
3275 | */ | |
285a6bda | 3276 | Dygraph.prototype.parseDataTable_ = function(data) { |
5829af3d | 3277 | var shortTextForAnnotationNum = function(num) { |
3278 | // converts [0-9]+ [A-Z][a-z]* | |
3279 | // example: 0=A, 1=B, 25=Z, 26=Aa, 27=Ab | |
3280 | // and continues like.. Ba Bb .. Za .. Zz..Aaa...Zzz Aaaa Zzzz | |
3281 | var shortText = String.fromCharCode(65 /* A */ + num % 26); | |
3282 | num = Math.floor(num / 26); | |
3283 | while ( num > 0 ) { | |
3284 | shortText = String.fromCharCode(65 /* A */ + (num - 1) % 26 ) + shortText.toLowerCase(); | |
3285 | num = Math.floor((num - 1) / 26); | |
3286 | } | |
3287 | return shortText; | |
42a9ebb8 | 3288 | }; |
5829af3d | 3289 | |
79420a1e DV |
3290 | var cols = data.getNumberOfColumns(); |
3291 | var rows = data.getNumberOfRows(); | |
3292 | ||
d955e223 | 3293 | var indepType = data.getColumnType(0); |
4440f6c8 | 3294 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda | 3295 | this.attrs_.xValueParser = Dygraph.dateParser; |
872a6a00 | 3296 | this.attrs_.axes.x.valueFormatter = Dygraph.dateValueFormatter; |
48e614ac | 3297 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; |
872a6a00 | 3298 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisLabelFormatter; |
33127159 | 3299 | } else if (indepType == 'number') { |
285a6bda | 3300 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
48e614ac | 3301 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; |
5b9b2142 | 3302 | this.attrs_.axes.x.ticker = Dygraph.numericTicks; |
48e614ac | 3303 | this.attrs_.axes.x.axisLabelFormatter = this.attrs_.axes.x.valueFormatter; |
285a6bda | 3304 | } else { |
8a68db7d | 3305 | console.error("only 'date', 'datetime' and 'number' types are supported " + |
464b5f50 | 3306 | "for column 1 of DataTable input (Got '" + indepType + "')"); |
79420a1e DV |
3307 | return null; |
3308 | } | |
3309 | ||
a685723c DV |
3310 | // Array of the column indices which contain data (and not annotations). |
3311 | var colIdx = []; | |
3312 | var annotationCols = {}; // data index -> [annotation cols] | |
3313 | var hasAnnotations = false; | |
758a629f DV |
3314 | var i, j; |
3315 | for (i = 1; i < cols; i++) { | |
a685723c DV |
3316 | var type = data.getColumnType(i); |
3317 | if (type == 'number') { | |
3318 | colIdx.push(i); | |
b0963cdb | 3319 | } else if (type == 'string' && this.getBooleanOption('displayAnnotations')) { |
a685723c DV |
3320 | // This is OK -- it's an annotation column. |
3321 | var dataIdx = colIdx[colIdx.length - 1]; | |
3322 | if (!annotationCols.hasOwnProperty(dataIdx)) { | |
3323 | annotationCols[dataIdx] = [i]; | |
3324 | } else { | |
3325 | annotationCols[dataIdx].push(i); | |
3326 | } | |
3327 | hasAnnotations = true; | |
3328 | } else { | |
8a68db7d | 3329 | console.error("Only 'number' is supported as a dependent type with Gviz." + |
464b5f50 | 3330 | " 'string' is only supported if displayAnnotations is true"); |
a685723c DV |
3331 | } |
3332 | } | |
3333 | ||
3334 | // Read column labels | |
3335 | // TODO(danvk): add support back for errorBars | |
3336 | var labels = [data.getColumnLabel(0)]; | |
758a629f | 3337 | for (i = 0; i < colIdx.length; i++) { |
a685723c | 3338 | labels.push(data.getColumnLabel(colIdx[i])); |
b0963cdb | 3339 | if (this.getBooleanOption("errorBars")) i += 1; |
a685723c DV |
3340 | } |
3341 | this.attrs_.labels = labels; | |
3342 | cols = labels.length; | |
3343 | ||
79420a1e | 3344 | var ret = []; |
987840a2 | 3345 | var outOfOrder = false; |
a685723c | 3346 | var annotations = []; |
758a629f | 3347 | for (i = 0; i < rows; i++) { |
79420a1e | 3348 | var row = []; |
debe4434 DV |
3349 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
3350 | data.getValue(i, 0) === null) { | |
8a68db7d | 3351 | console.warn("Ignoring row " + i + |
464b5f50 | 3352 | " of DataTable because of undefined or null first column."); |
debe4434 DV |
3353 | continue; |
3354 | } | |
3355 | ||
c21d2c2d | 3356 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
3357 | row.push(data.getValue(i, 0).getTime()); |
3358 | } else { | |
3359 | row.push(data.getValue(i, 0)); | |
3360 | } | |
b0963cdb | 3361 | if (!this.getBooleanOption("errorBars")) { |
758a629f | 3362 | for (j = 0; j < colIdx.length; j++) { |
a685723c DV |
3363 | var col = colIdx[j]; |
3364 | row.push(data.getValue(i, col)); | |
3365 | if (hasAnnotations && | |
3366 | annotationCols.hasOwnProperty(col) && | |
758a629f | 3367 | data.getValue(i, annotationCols[col][0]) !== null) { |
a685723c DV |
3368 | var ann = {}; |
3369 | ann.series = data.getColumnLabel(col); | |
3370 | ann.xval = row[0]; | |
5829af3d | 3371 | ann.shortText = shortTextForAnnotationNum(annotations.length); |
a685723c DV |
3372 | ann.text = ''; |
3373 | for (var k = 0; k < annotationCols[col].length; k++) { | |
3374 | if (k) ann.text += "\n"; | |
3375 | ann.text += data.getValue(i, annotationCols[col][k]); | |
3376 | } | |
3377 | annotations.push(ann); | |
3378 | } | |
3e3f84e4 | 3379 | } |
92fd68d8 DV |
3380 | |
3381 | // Strip out infinities, which give dygraphs problems later on. | |
758a629f | 3382 | for (j = 0; j < row.length; j++) { |
92fd68d8 DV |
3383 | if (!isFinite(row[j])) row[j] = null; |
3384 | } | |
3e3f84e4 | 3385 | } else { |
758a629f | 3386 | for (j = 0; j < cols - 1; j++) { |
3e3f84e4 DV |
3387 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); |
3388 | } | |
79420a1e | 3389 | } |
987840a2 DV |
3390 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
3391 | outOfOrder = true; | |
3392 | } | |
243d96e8 | 3393 | ret.push(row); |
79420a1e | 3394 | } |
987840a2 DV |
3395 | |
3396 | if (outOfOrder) { | |
8a68db7d | 3397 | console.warn("DataTable is out of order; order it correctly to speed loading."); |
758a629f | 3398 | ret.sort(function(a,b) { return a[0] - b[0]; }); |
987840a2 | 3399 | } |
a685723c DV |
3400 | this.rawData_ = ret; |
3401 | ||
3402 | if (annotations.length > 0) { | |
3403 | this.setAnnotations(annotations, true); | |
3404 | } | |
0fa724fd | 3405 | this.attributes_.reparseSeries(); |
758a629f | 3406 | }; |
79420a1e | 3407 | |
629a09ae | 3408 | /** |
6f5f0b2b DV |
3409 | * Signals to plugins that the chart data has updated. |
3410 | * This happens after the data has updated but before the chart has redrawn. | |
3411 | */ | |
3412 | Dygraph.prototype.cascadeDataDidUpdateEvent_ = function() { | |
3413 | // TODO(danvk): there are some issues checking xAxisRange() and using | |
3414 | // toDomCoords from handlers of this event. The visible range should be set | |
3415 | // when the chart is drawn, not derived from the data. | |
3416 | this.cascadeEvents_('dataDidUpdate', {}); | |
3417 | }; | |
3418 | ||
3419 | /** | |
6a1aa64f DV |
3420 | * Get the CSV data. If it's in a function, call that function. If it's in a |
3421 | * file, do an XMLHttpRequest to get it. | |
3422 | * @private | |
3423 | */ | |
285a6bda | 3424 | Dygraph.prototype.start_ = function() { |
36d4fabf RK |
3425 | var data = this.file_; |
3426 | ||
3427 | // Functions can return references of all other types. | |
3428 | if (typeof data == 'function') { | |
3429 | data = data(); | |
3430 | } | |
3431 | ||
3432 | if (Dygraph.isArrayLike(data)) { | |
3433 | this.rawData_ = this.parseArray_(data); | |
6f5f0b2b | 3434 | this.cascadeDataDidUpdateEvent_(); |
26ca7938 | 3435 | this.predraw_(); |
36d4fabf RK |
3436 | } else if (typeof data == 'object' && |
3437 | typeof data.getColumnRange == 'function') { | |
79420a1e | 3438 | // must be a DataTable from gviz. |
36d4fabf | 3439 | this.parseDataTable_(data); |
6f5f0b2b | 3440 | this.cascadeDataDidUpdateEvent_(); |
26ca7938 | 3441 | this.predraw_(); |
36d4fabf | 3442 | } else if (typeof data == 'string') { |
285a6bda | 3443 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. |
e5763589 DV |
3444 | var line_delimiter = Dygraph.detectLineDelimiter(data); |
3445 | if (line_delimiter) { | |
36d4fabf | 3446 | this.loadedEvent_(data); |
285a6bda | 3447 | } else { |
efc5160f DV |
3448 | // REMOVE_FOR_IE |
3449 | var req; | |
3450 | if (window.XMLHttpRequest) { | |
3451 | // Firefox, Opera, IE7, and other browsers will use the native object | |
3452 | req = new XMLHttpRequest(); | |
3453 | } else { | |
3454 | // IE 5 and 6 will use the ActiveX control | |
3455 | req = new ActiveXObject("Microsoft.XMLHTTP"); | |
3456 | } | |
3457 | ||
285a6bda DV |
3458 | var caller = this; |
3459 | req.onreadystatechange = function () { | |
3460 | if (req.readyState == 4) { | |
758a629f DV |
3461 | if (req.status === 200 || // Normal http |
3462 | req.status === 0) { // Chrome w/ --allow-file-access-from-files | |
285a6bda DV |
3463 | caller.loadedEvent_(req.responseText); |
3464 | } | |
6a1aa64f | 3465 | } |
285a6bda | 3466 | }; |
6a1aa64f | 3467 | |
36d4fabf | 3468 | req.open("GET", data, true); |
285a6bda DV |
3469 | req.send(null); |
3470 | } | |
3471 | } else { | |
8a68db7d | 3472 | console.error("Unknown data format: " + (typeof data)); |
6a1aa64f DV |
3473 | } |
3474 | }; | |
3475 | ||
3476 | /** | |
3477 | * Changes various properties of the graph. These can include: | |
3478 | * <ul> | |
3479 | * <li>file: changes the source data for the graph</li> | |
3480 | * <li>errorBars: changes whether the data contains stddev</li> | |
3481 | * </ul> | |
dcb25130 | 3482 | * |
ccfcc169 DV |
3483 | * There's a huge variety of options that can be passed to this method. For a |
3484 | * full list, see http://dygraphs.com/options.html. | |
3485 | * | |
8ef9d44d DV |
3486 | * @param {Object} input_attrs The new properties and values |
3487 | * @param {boolean} block_redraw Usually the chart is redrawn after every | |
3488 | * call to updateOptions(). If you know better, you can pass true to | |
3489 | * explicitly block the redraw. This can be useful for chaining | |
3490 | * updateOptions() calls, avoiding the occasional infinite loop and | |
3491 | * preventing redraws when it's not necessary (e.g. when updating a | |
3492 | * callback). | |
6a1aa64f | 3493 | */ |
48e614ac | 3494 | Dygraph.prototype.updateOptions = function(input_attrs, block_redraw) { |
ccfcc169 DV |
3495 | if (typeof(block_redraw) == 'undefined') block_redraw = false; |
3496 | ||
48e614ac | 3497 | // mapLegacyOptions_ drops the "file" parameter as a convenience to us. |
758a629f | 3498 | var file = input_attrs.file; |
48e614ac DV |
3499 | var attrs = Dygraph.mapLegacyOptions_(input_attrs); |
3500 | ||
ccfcc169 | 3501 | // TODO(danvk): this is a mess. Move these options into attr_. |
c65f2303 | 3502 | if ('rollPeriod' in attrs) { |
6a1aa64f DV |
3503 | this.rollPeriod_ = attrs.rollPeriod; |
3504 | } | |
c65f2303 | 3505 | if ('dateWindow' in attrs) { |
6a1aa64f | 3506 | this.dateWindow_ = attrs.dateWindow; |
e5152598 | 3507 | if (!('isZoomedIgnoreProgrammaticZoom' in attrs)) { |
758a629f | 3508 | this.zoomed_x_ = (attrs.dateWindow !== null); |
81856f70 | 3509 | } |
b7e5862d | 3510 | } |
e5152598 | 3511 | if ('valueRange' in attrs && !('isZoomedIgnoreProgrammaticZoom' in attrs)) { |
758a629f | 3512 | this.zoomed_y_ = (attrs.valueRange !== null); |
6a1aa64f | 3513 | } |
450fe64b DV |
3514 | |
3515 | // TODO(danvk): validate per-series options. | |
46dde5f9 DV |
3516 | // Supported: |
3517 | // strokeWidth | |
3518 | // pointSize | |
3519 | // drawPoints | |
3520 | // highlightCircleSize | |
450fe64b | 3521 | |
9ca829f2 DV |
3522 | // Check if this set options will require new points. |
3523 | var requiresNewPoints = Dygraph.isPixelChangingOptionList(this.attr_("labels"), attrs); | |
3524 | ||
48e614ac | 3525 | Dygraph.updateDeep(this.user_attrs_, attrs); |
285a6bda | 3526 | |
b635457c RK |
3527 | this.attributes_.reparseSeries(); |
3528 | ||
48e614ac | 3529 | if (file) { |
6f5f0b2b DV |
3530 | // This event indicates that the data is about to change, but hasn't yet. |
3531 | // TODO(danvk): support cancelation of the update via this event. | |
3532 | this.cascadeEvents_('dataWillUpdate', {}); | |
3533 | ||
48e614ac | 3534 | this.file_ = file; |
ccfcc169 | 3535 | if (!block_redraw) this.start_(); |
6a1aa64f | 3536 | } else { |
9ca829f2 DV |
3537 | if (!block_redraw) { |
3538 | if (requiresNewPoints) { | |
48e614ac | 3539 | this.predraw_(); |
9ca829f2 | 3540 | } else { |
e2c21500 | 3541 | this.renderGraph_(false); |
9ca829f2 DV |
3542 | } |
3543 | } | |
6a1aa64f DV |
3544 | } |
3545 | }; | |
3546 | ||
3547 | /** | |
48e614ac DV |
3548 | * Returns a copy of the options with deprecated names converted into current |
3549 | * names. Also drops the (potentially-large) 'file' attribute. If the caller is | |
3550 | * interested in that, they should save a copy before calling this. | |
3551 | * @private | |
3552 | */ | |
3553 | Dygraph.mapLegacyOptions_ = function(attrs) { | |
3554 | var my_attrs = {}; | |
3555 | for (var k in attrs) { | |
3ce712e6 | 3556 | if (!attrs.hasOwnProperty(k)) continue; |
48e614ac DV |
3557 | if (k == 'file') continue; |
3558 | if (attrs.hasOwnProperty(k)) my_attrs[k] = attrs[k]; | |
3559 | } | |
3560 | ||
3561 | var set = function(axis, opt, value) { | |
3562 | if (!my_attrs.axes) my_attrs.axes = {}; | |
3563 | if (!my_attrs.axes[axis]) my_attrs.axes[axis] = {}; | |
3564 | my_attrs.axes[axis][opt] = value; | |
3565 | }; | |
3566 | var map = function(opt, axis, new_opt) { | |
3567 | if (typeof(attrs[opt]) != 'undefined') { | |
8a68db7d | 3568 | console.warn("Option " + opt + " is deprecated. Use the " + |
a9172eb1 | 3569 | new_opt + " option for the " + axis + " axis instead. " + |
33a10307 RK |
3570 | "(e.g. { axes : { " + axis + " : { " + new_opt + " : ... } } } " + |
3571 | "(see http://dygraphs.com/per-axis.html for more information."); | |
48e614ac DV |
3572 | set(axis, new_opt, attrs[opt]); |
3573 | delete my_attrs[opt]; | |
3574 | } | |
3575 | }; | |
3576 | ||
3577 | // This maps, e.g., xValueFormater -> axes: { x: { valueFormatter: ... } } | |
3578 | map('xValueFormatter', 'x', 'valueFormatter'); | |
3579 | map('pixelsPerXLabel', 'x', 'pixelsPerLabel'); | |
3580 | map('xAxisLabelFormatter', 'x', 'axisLabelFormatter'); | |
3581 | map('xTicker', 'x', 'ticker'); | |
3582 | map('yValueFormatter', 'y', 'valueFormatter'); | |
3583 | map('pixelsPerYLabel', 'y', 'pixelsPerLabel'); | |
3584 | map('yAxisLabelFormatter', 'y', 'axisLabelFormatter'); | |
3585 | map('yTicker', 'y', 'ticker'); | |
7f6a7190 RK |
3586 | map('drawXGrid', 'x', 'drawGrid'); |
3587 | map('drawXAxis', 'x', 'drawAxis'); | |
3588 | map('drawYGrid', 'y', 'drawGrid'); | |
3589 | map('drawYAxis', 'y', 'drawAxis'); | |
48e614ac DV |
3590 | return my_attrs; |
3591 | }; | |
3592 | ||
3593 | /** | |
697e70b2 DV |
3594 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
3595 | * containing div (which has presumably changed size since the dygraph was | |
3596 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
3597 | * |
3598 | * This is far more efficient than destroying and re-instantiating a | |
3599 | * Dygraph, since it doesn't have to reparse the underlying data. | |
3600 | * | |
1bc88216 DV |
3601 | * @param {number} width Width (in pixels) |
3602 | * @param {number} height Height (in pixels) | |
697e70b2 DV |
3603 | */ |
3604 | Dygraph.prototype.resize = function(width, height) { | |
e8c7ef86 DV |
3605 | if (this.resize_lock) { |
3606 | return; | |
3607 | } | |
3608 | this.resize_lock = true; | |
3609 | ||
697e70b2 | 3610 | if ((width === null) != (height === null)) { |
8a68db7d | 3611 | console.warn("Dygraph.resize() should be called with zero parameters or " + |
464b5f50 | 3612 | "two non-NULL parameters. Pretending it was zero."); |
697e70b2 DV |
3613 | width = height = null; |
3614 | } | |
3615 | ||
4b4d1a63 DV |
3616 | var old_width = this.width_; |
3617 | var old_height = this.height_; | |
b16e6369 | 3618 | |
697e70b2 DV |
3619 | if (width) { |
3620 | this.maindiv_.style.width = width + "px"; | |
3621 | this.maindiv_.style.height = height + "px"; | |
3622 | this.width_ = width; | |
3623 | this.height_ = height; | |
3624 | } else { | |
ccd9d7c2 PF |
3625 | this.width_ = this.maindiv_.clientWidth; |
3626 | this.height_ = this.maindiv_.clientHeight; | |
697e70b2 DV |
3627 | } |
3628 | ||
4b4d1a63 | 3629 | if (old_width != this.width_ || old_height != this.height_) { |
d82a3164 KW |
3630 | // Resizing a canvas erases it, even when the size doesn't change, so |
3631 | // any resize needs to be followed by a redraw. | |
3632 | this.resizeElements_(); | |
4b4d1a63 DV |
3633 | this.predraw_(); |
3634 | } | |
e8c7ef86 DV |
3635 | |
3636 | this.resize_lock = false; | |
697e70b2 DV |
3637 | }; |
3638 | ||
3639 | /** | |
6faebb69 | 3640 | * Adjusts the number of points in the rolling average. Updates the graph to |
6a1aa64f | 3641 | * reflect the new averaging period. |
1bc88216 | 3642 | * @param {number} length Number of points over which to average the data. |
6a1aa64f | 3643 | */ |
285a6bda | 3644 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f | 3645 | this.rollPeriod_ = length; |
26ca7938 | 3646 | this.predraw_(); |
6a1aa64f | 3647 | }; |
540d00f1 | 3648 | |
f8cfec73 | 3649 | /** |
1cf11047 DV |
3650 | * Returns a boolean array of visibility statuses. |
3651 | */ | |
3652 | Dygraph.prototype.visibility = function() { | |
3653 | // Do lazy-initialization, so that this happens after we know the number of | |
3654 | // data series. | |
b0963cdb | 3655 | if (!this.getOption("visibility")) { |
758a629f | 3656 | this.attrs_.visibility = []; |
1cf11047 | 3657 | } |
758a629f | 3658 | // TODO(danvk): it looks like this could go into an infinite loop w/ user_attrs. |
b0963cdb | 3659 | while (this.getOption("visibility").length < this.numColumns() - 1) { |
758a629f | 3660 | this.attrs_.visibility.push(true); |
1cf11047 | 3661 | } |
b0963cdb | 3662 | return this.getOption("visibility"); |
1cf11047 DV |
3663 | }; |
3664 | ||
3665 | /** | |
3666 | * Changes the visiblity of a series. | |
2aed8ad8 | 3667 | * |
7e64db42 RK |
3668 | * @param {number} num the series index |
3669 | * @param {boolean} value true or false, identifying the visibility. | |
1cf11047 DV |
3670 | */ |
3671 | Dygraph.prototype.setVisibility = function(num, value) { | |
3672 | var x = this.visibility(); | |
a6c109c1 | 3673 | if (num < 0 || num >= x.length) { |
8a68db7d | 3674 | console.warn("invalid series number in setVisibility: " + num); |
1cf11047 DV |
3675 | } else { |
3676 | x[num] = value; | |
26ca7938 | 3677 | this.predraw_(); |
1cf11047 DV |
3678 | } |
3679 | }; | |
3680 | ||
3681 | /** | |
0cb9bd91 DV |
3682 | * How large of an area will the dygraph render itself in? |
3683 | * This is used for testing. | |
3684 | * @return A {width: w, height: h} object. | |
3685 | * @private | |
3686 | */ | |
3687 | Dygraph.prototype.size = function() { | |
3688 | return { width: this.width_, height: this.height_ }; | |
3689 | }; | |
3690 | ||
3691 | /** | |
5c528fa2 | 3692 | * Update the list of annotations and redraw the chart. |
41ee764f DV |
3693 | * See dygraphs.com/annotations.html for more info on how to use annotations. |
3694 | * @param ann {Array} An array of annotation objects. | |
3695 | * @param suppressDraw {Boolean} Set to "true" to block chart redraw (optional). | |
5c528fa2 | 3696 | */ |
a685723c | 3697 | Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { |
3c51ab74 DV |
3698 | // Only add the annotation CSS rule once we know it will be used. |
3699 | Dygraph.addAnnotationRule(); | |
5c528fa2 | 3700 | this.annotations_ = ann; |
af6e4ad5 | 3701 | if (!this.layout_) { |
8a68db7d | 3702 | console.warn("Tried to setAnnotations before dygraph was ready. " + |
464b5f50 DV |
3703 | "Try setting them in a ready() block. See " + |
3704 | "dygraphs.com/tests/annotation.html"); | |
af6e4ad5 DV |
3705 | return; |
3706 | } | |
3707 | ||
5c528fa2 | 3708 | this.layout_.setAnnotations(this.annotations_); |
a685723c | 3709 | if (!suppressDraw) { |
26ca7938 | 3710 | this.predraw_(); |
a685723c | 3711 | } |
5c528fa2 DV |
3712 | }; |
3713 | ||
3714 | /** | |
3715 | * Return the list of annotations. | |
3716 | */ | |
3717 | Dygraph.prototype.annotations = function() { | |
3718 | return this.annotations_; | |
3719 | }; | |
3720 | ||
46dde5f9 | 3721 | /** |
82c6fe4d KW |
3722 | * Get the list of label names for this graph. The first column is the |
3723 | * x-axis, so the data series names start at index 1. | |
4c10c8d2 RK |
3724 | * |
3725 | * Returns null when labels have not yet been defined. | |
82c6fe4d | 3726 | */ |
e2c21500 | 3727 | Dygraph.prototype.getLabels = function() { |
4c10c8d2 RK |
3728 | var labels = this.attr_("labels"); |
3729 | return labels ? labels.slice() : null; | |
82c6fe4d KW |
3730 | }; |
3731 | ||
3732 | /** | |
46dde5f9 DV |
3733 | * Get the index of a series (column) given its name. The first column is the |
3734 | * x-axis, so the data series start with index 1. | |
3735 | */ | |
3736 | Dygraph.prototype.indexFromSetName = function(name) { | |
82c6fe4d | 3737 | return this.setIndexByName_[name]; |
46dde5f9 DV |
3738 | }; |
3739 | ||
629a09ae | 3740 | /** |
5bcc58b4 DV |
3741 | * Trigger a callback when the dygraph has drawn itself and is ready to be |
3742 | * manipulated. This is primarily useful when dygraphs has to do an XHR for the | |
3743 | * data (i.e. a URL is passed as the data source) and the chart is drawn | |
3744 | * asynchronously. If the chart has already drawn, the callback will fire | |
3745 | * immediately. | |
3746 | * | |
3747 | * This is a good place to call setAnnotation(). | |
3748 | * | |
3749 | * @param {function(!Dygraph)} callback The callback to trigger when the chart | |
3750 | * is ready. | |
3751 | */ | |
3752 | Dygraph.prototype.ready = function(callback) { | |
3753 | if (this.is_initial_draw_) { | |
3754 | this.readyFns_.push(callback); | |
3755 | } else { | |
4ee251cb | 3756 | callback.call(this, this); |
5bcc58b4 DV |
3757 | } |
3758 | }; | |
3759 | ||
3760 | /** | |
629a09ae DV |
3761 | * @private |
3762 | * Adds a default style for the annotation CSS classes to the document. This is | |
3763 | * only executed when annotations are actually used. It is designed to only be | |
3764 | * called once -- all calls after the first will return immediately. | |
3765 | */ | |
5c528fa2 | 3766 | Dygraph.addAnnotationRule = function() { |
d38c6191 | 3767 | // TODO(danvk): move this function into plugins/annotations.js? |
5c528fa2 DV |
3768 | if (Dygraph.addedAnnotationCSS) return; |
3769 | ||
5c528fa2 DV |
3770 | var rule = "border: 1px solid black; " + |
3771 | "background-color: white; " + | |
3772 | "text-align: center;"; | |
22186871 DV |
3773 | |
3774 | var styleSheetElement = document.createElement("style"); | |
3775 | styleSheetElement.type = "text/css"; | |
3776 | document.getElementsByTagName("head")[0].appendChild(styleSheetElement); | |
3777 | ||
3778 | // Find the first style sheet that we can access. | |
3779 | // We may not add a rule to a style sheet from another domain for security | |
3780 | // reasons. This sometimes comes up when using gviz, since the Google gviz JS | |
3781 | // adds its own style sheets from google.com. | |
3782 | for (var i = 0; i < document.styleSheets.length; i++) { | |
3783 | if (document.styleSheets[i].disabled) continue; | |
3784 | var mysheet = document.styleSheets[i]; | |
3785 | try { | |
3786 | if (mysheet.insertRule) { // Firefox | |
3787 | var idx = mysheet.cssRules ? mysheet.cssRules.length : 0; | |
3788 | mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", idx); | |
3789 | } else if (mysheet.addRule) { // IE | |
3790 | mysheet.addRule(".dygraphDefaultAnnotation", rule); | |
3791 | } | |
3792 | Dygraph.addedAnnotationCSS = true; | |
3793 | return; | |
3794 | } catch(err) { | |
3795 | // Was likely a security exception. | |
3796 | } | |
5c528fa2 DV |
3797 | } |
3798 | ||
8a68db7d | 3799 | console.warn("Unable to add default annotation CSS rule; display may be off."); |
758a629f | 3800 | }; |
8887663f DV |
3801 | |
3802 | return Dygraph; | |
3803 | ||
3804 | })(); |