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88e95c46 DV |
1 | /** |
2 | * @license | |
3 | * Copyright 2006 Dan Vanderkam (danvdk@gmail.com) | |
4 | * MIT-licensed (http://opensource.org/licenses/MIT) | |
5 | */ | |
6a1aa64f DV |
6 | |
7 | /** | |
8 | * @fileoverview Creates an interactive, zoomable graph based on a CSV file or | |
285a6bda DV |
9 | * string. Dygraph can handle multiple series with or without error bars. The |
10 | * date/value ranges will be automatically set. Dygraph uses the | |
6a1aa64f DV |
11 | * <canvas> tag, so it only works in FF1.5+. |
12 | * @author danvdk@gmail.com (Dan Vanderkam) | |
13 | ||
14 | Usage: | |
15 | <div id="graphdiv" style="width:800px; height:500px;"></div> | |
16 | <script type="text/javascript"> | |
285a6bda DV |
17 | new Dygraph(document.getElementById("graphdiv"), |
18 | "datafile.csv", // CSV file with headers | |
19 | { }); // options | |
6a1aa64f DV |
20 | </script> |
21 | ||
22 | The CSV file is of the form | |
23 | ||
285a6bda | 24 | Date,SeriesA,SeriesB,SeriesC |
6a1aa64f DV |
25 | YYYYMMDD,A1,B1,C1 |
26 | YYYYMMDD,A2,B2,C2 | |
27 | ||
6a1aa64f DV |
28 | If the 'errorBars' option is set in the constructor, the input should be of |
29 | the form | |
285a6bda | 30 | Date,SeriesA,SeriesB,... |
6a1aa64f DV |
31 | YYYYMMDD,A1,sigmaA1,B1,sigmaB1,... |
32 | YYYYMMDD,A2,sigmaA2,B2,sigmaB2,... | |
33 | ||
34 | If the 'fractions' option is set, the input should be of the form: | |
35 | ||
285a6bda | 36 | Date,SeriesA,SeriesB,... |
6a1aa64f DV |
37 | YYYYMMDD,A1/B1,A2/B2,... |
38 | YYYYMMDD,A1/B1,A2/B2,... | |
39 | ||
40 | And error bars will be calculated automatically using a binomial distribution. | |
41 | ||
727439b4 | 42 | For further documentation and examples, see http://dygraphs.com/ |
6a1aa64f DV |
43 | |
44 | */ | |
45 | ||
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) { |
0b85865a | 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) { |
e0269a3d | 233 | // e.g. '21 Jan' (%d%b) |
0b85865a | 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, | |
8846615a | 293 | rightGap: 5, |
285a6bda DV |
294 | |
295 | showRoller: false, | |
285a6bda | 296 | xValueParser: Dygraph.dateParser, |
285a6bda | 297 | |
3d67f03b DV |
298 | delimiter: ',', |
299 | ||
285a6bda DV |
300 | sigma: 2.0, |
301 | errorBars: false, | |
302 | fractions: false, | |
303 | wilsonInterval: true, // only relevant if fractions is true | |
5954ef32 | 304 | customBars: false, |
43af96e7 NK |
305 | fillGraph: false, |
306 | fillAlpha: 0.15, | |
f032c51d | 307 | connectSeparatedPoints: false, |
43af96e7 NK |
308 | |
309 | stackedGraph: false, | |
30a5cfc6 | 310 | stackedGraphNaNFill: 'all', |
afdc483f NN |
311 | hideOverlayOnMouseOut: true, |
312 | ||
c08d4ce2 | 313 | legend: 'onmouseover', |
00c281d4 | 314 | stepPlot: false, |
062ef401 | 315 | avoidMinZero: false, |
fa460473 KW |
316 | xRangePad: 0, |
317 | yRangePad: null, | |
f4b87da2 | 318 | drawAxesAtZero: false, |
062ef401 | 319 | |
ad1798c2 | 320 | // Sizes of the various chart labels. |
b4202b3d | 321 | titleHeight: 28, |
86cce9e8 DV |
322 | xLabelHeight: 18, |
323 | yLabelWidth: 18, | |
ad1798c2 | 324 | |
423f5ed3 DV |
325 | drawXAxis: true, |
326 | drawYAxis: true, | |
327 | axisLineColor: "black", | |
990d6a35 DV |
328 | axisLineWidth: 0.3, |
329 | gridLineWidth: 0.3, | |
330 | axisLabelColor: "black", | |
990d6a35 DV |
331 | axisLabelWidth: 50, |
332 | drawYGrid: true, | |
333 | drawXGrid: true, | |
334 | gridLineColor: "rgb(128,128,128)", | |
423f5ed3 | 335 | |
48e614ac | 336 | interactionModel: null, // will be set to Dygraph.Interaction.defaultModel |
b1a3b195 | 337 | animatedZooms: false, // (for now) |
48e614ac | 338 | |
ccd9d7c2 PF |
339 | // Range selector options |
340 | showRangeSelector: false, | |
341 | rangeSelectorHeight: 40, | |
342 | rangeSelectorPlotStrokeColor: "#808FAB", | |
343 | rangeSelectorPlotFillColor: "#A7B1C4", | |
0a0885d1 | 344 | showInRangeSelector: null, |
ccd9d7c2 | 345 | |
38e3d209 DV |
346 | // The ordering here ensures that central lines always appear above any |
347 | // fill bars/error bars. | |
348 | plotter: [ | |
349 | Dygraph.Plotters.fillPlotter, | |
350 | Dygraph.Plotters.errorPlotter, | |
351 | Dygraph.Plotters.linePlotter | |
352 | ], | |
353 | ||
eced46cf | 354 | plugins: [ ], |
d9fbba56 | 355 | |
48e614ac DV |
356 | // per-axis options |
357 | axes: { | |
358 | x: { | |
d7aa8aa5 DV |
359 | pixelsPerLabel: 70, |
360 | axisLabelWidth: 60, | |
872a6a00 DV |
361 | axisLabelFormatter: Dygraph.dateAxisLabelFormatter, |
362 | valueFormatter: Dygraph.dateValueFormatter, | |
9e906ae6 | 363 | drawGrid: true, |
7f6a7190 | 364 | drawAxis: true, |
9e906ae6 | 365 | independentTicks: true, |
48e614ac DV |
366 | ticker: null // will be set in dygraph-tickers.js |
367 | }, | |
368 | y: { | |
e0269a3d | 369 | axisLabelWidth: 50, |
48e614ac DV |
370 | pixelsPerLabel: 30, |
371 | valueFormatter: Dygraph.numberValueFormatter, | |
372 | axisLabelFormatter: Dygraph.numberAxisLabelFormatter, | |
9e906ae6 | 373 | drawGrid: true, |
7f6a7190 | 374 | drawAxis: true, |
9e906ae6 | 375 | independentTicks: true, |
48e614ac DV |
376 | ticker: null // will be set in dygraph-tickers.js |
377 | }, | |
378 | y2: { | |
e0269a3d | 379 | axisLabelWidth: 50, |
48e614ac DV |
380 | pixelsPerLabel: 30, |
381 | valueFormatter: Dygraph.numberValueFormatter, | |
382 | axisLabelFormatter: Dygraph.numberAxisLabelFormatter, | |
e0269a3d | 383 | drawAxis: true, // only applies when there are two axes of data. |
9e906ae6 DE |
384 | drawGrid: false, |
385 | independentTicks: false, | |
48e614ac DV |
386 | ticker: null // will be set in dygraph-tickers.js |
387 | } | |
388 | } | |
285a6bda DV |
389 | }; |
390 | ||
39b0e098 RK |
391 | // Directions for panning and zooming. Use bit operations when combined |
392 | // values are possible. | |
393 | Dygraph.HORIZONTAL = 1; | |
394 | Dygraph.VERTICAL = 2; | |
395 | ||
e2c21500 DV |
396 | // Installed plugins, in order of precedence (most-general to most-specific). |
397 | // Plugins are installed after they are defined, in plugins/install.js. | |
398 | Dygraph.PLUGINS = [ | |
399 | ]; | |
400 | ||
5c528fa2 DV |
401 | // Used for initializing annotation CSS rules only once. |
402 | Dygraph.addedAnnotationCSS = false; | |
403 | ||
285a6bda DV |
404 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { |
405 | // Labels is no longer a constructor parameter, since it's typically set | |
406 | // directly from the data source. It also conains a name for the x-axis, | |
407 | // which the previous constructor form did not. | |
758a629f | 408 | if (labels !== null) { |
285a6bda DV |
409 | var new_labels = ["Date"]; |
410 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); | |
fc80a396 | 411 | Dygraph.update(attrs, { 'labels': new_labels }); |
285a6bda DV |
412 | } |
413 | this.__init__(div, file, attrs); | |
8e4a6af3 DV |
414 | }; |
415 | ||
6a1aa64f | 416 | /** |
285a6bda | 417 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
7aedf6fe | 418 | * and context <canvas> inside of it. See the constructor for details. |
6a1aa64f | 419 | * on the parameters. |
12e4c741 | 420 | * @param {Element} div the Element to render the graph into. |
1bc88216 | 421 | * @param {string | Function} file Source data |
6a1aa64f DV |
422 | * @param {Object} attrs Miscellaneous other options |
423 | * @private | |
424 | */ | |
285a6bda | 425 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
a2c8fff4 DV |
426 | // Hack for IE: if we're using excanvas and the document hasn't finished |
427 | // loading yet (and hence may not have initialized whatever it needs to | |
428 | // initialize), then keep calling this routine periodically until it has. | |
429 | if (/MSIE/.test(navigator.userAgent) && !window.opera && | |
430 | typeof(G_vmlCanvasManager) != 'undefined' && | |
431 | document.readyState != 'complete') { | |
432 | var self = this; | |
758a629f | 433 | setTimeout(function() { self.__init__(div, file, attrs); }, 100); |
ccd9d7c2 | 434 | return; |
a2c8fff4 DV |
435 | } |
436 | ||
285a6bda | 437 | // Support two-argument constructor |
758a629f | 438 | if (attrs === null || attrs === undefined) { attrs = {}; } |
285a6bda | 439 | |
48e614ac DV |
440 | attrs = Dygraph.mapLegacyOptions_(attrs); |
441 | ||
8a870376 RK |
442 | if (typeof(div) == 'string') { |
443 | div = document.getElementById(div); | |
444 | } | |
445 | ||
48e614ac | 446 | if (!div) { |
8a68db7d | 447 | console.error("Constructing dygraph with a non-existent div!"); |
48e614ac DV |
448 | return; |
449 | } | |
450 | ||
920208fb PF |
451 | this.isUsingExcanvas_ = typeof(G_vmlCanvasManager) != 'undefined'; |
452 | ||
6a1aa64f | 453 | // Copy the important bits into the object |
32988383 | 454 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
6a1aa64f | 455 | this.maindiv_ = div; |
6a1aa64f | 456 | this.file_ = file; |
285a6bda | 457 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
6a1aa64f | 458 | this.previousVerticalX_ = -1; |
6a1aa64f | 459 | this.fractions_ = attrs.fractions || false; |
6a1aa64f | 460 | this.dateWindow_ = attrs.dateWindow || null; |
8b83c6cc | 461 | |
5c528fa2 | 462 | this.annotations_ = []; |
7aedf6fe | 463 | |
45f2c689 | 464 | // Zoomed indicators - These indicate when the graph has been zoomed and on what axis. |
57baab03 NN |
465 | this.zoomed_x_ = false; |
466 | this.zoomed_y_ = false; | |
45f2c689 | 467 | |
f7d6278e DV |
468 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
469 | // div, then only one will be drawn. | |
470 | div.innerHTML = ""; | |
471 | ||
0cb9bd91 DV |
472 | // For historical reasons, the 'width' and 'height' options trump all CSS |
473 | // rules _except_ for an explicit 'width' or 'height' on the div. | |
474 | // As an added convenience, if the div has zero height (like <div></div> does | |
475 | // without any styles), then we use a default height/width. | |
758a629f | 476 | if (div.style.width === '' && attrs.width) { |
0cb9bd91 | 477 | div.style.width = attrs.width + "px"; |
285a6bda | 478 | } |
758a629f | 479 | if (div.style.height === '' && attrs.height) { |
0cb9bd91 | 480 | div.style.height = attrs.height + "px"; |
32988383 | 481 | } |
758a629f | 482 | if (div.style.height === '' && div.clientHeight === 0) { |
0cb9bd91 | 483 | div.style.height = Dygraph.DEFAULT_HEIGHT + "px"; |
758a629f | 484 | if (div.style.width === '') { |
0cb9bd91 DV |
485 | div.style.width = Dygraph.DEFAULT_WIDTH + "px"; |
486 | } | |
c21d2c2d | 487 | } |
c28088bc KW |
488 | // These will be zero if the dygraph's div is hidden. In that case, |
489 | // use the user-specified attributes if present. If not, use zero | |
490 | // and assume the user will call resize to fix things later. | |
491 | this.width_ = div.clientWidth || attrs.width || 0; | |
492 | this.height_ = div.clientHeight || attrs.height || 0; | |
32988383 | 493 | |
344ba8c0 | 494 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
758a629f DV |
495 | if (attrs.stackedGraph) { |
496 | attrs.fillGraph = true; | |
43af96e7 NK |
497 | // TODO(nikhilk): Add any other stackedGraph checks here. |
498 | } | |
499 | ||
a9172eb1 RK |
500 | // DEPRECATION WARNING: All option processing should be moved from |
501 | // attrs_ and user_attrs_ to options_, which holds all this information. | |
502 | // | |
285a6bda DV |
503 | // Dygraphs has many options, some of which interact with one another. |
504 | // To keep track of everything, we maintain two sets of options: | |
505 | // | |
c21d2c2d | 506 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
507 | // this.attrs_ defaults, options derived from user_attrs_, data. |
508 | // | |
509 | // Options are then accessed this.attr_('attr'), which first looks at | |
510 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
511 | // defaults without overriding behavior that the user specifically asks for. | |
512 | this.user_attrs_ = {}; | |
fc80a396 | 513 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 514 | |
48e614ac | 515 | // This sequence ensures that Dygraph.DEFAULT_ATTRS is never modified. |
285a6bda | 516 | this.attrs_ = {}; |
48e614ac | 517 | Dygraph.updateDeep(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 518 | |
16269f6e | 519 | this.boundaryIds_ = []; |
82c6fe4d | 520 | this.setIndexByName_ = {}; |
857a6931 | 521 | this.datasetIndex_ = []; |
6a1aa64f | 522 | |
6a4587ac | 523 | this.registeredEvents_ = []; |
de8f284f | 524 | this.eventListeners_ = {}; |
6a4587ac | 525 | |
c1780ad0 RK |
526 | this.attributes_ = new DygraphOptions(this); |
527 | ||
6a1aa64f DV |
528 | // Create the containing DIV and other interactive elements |
529 | this.createInterface_(); | |
530 | ||
e2c21500 DV |
531 | // Activate plugins. |
532 | this.plugins_ = []; | |
d9fbba56 RK |
533 | var plugins = Dygraph.PLUGINS.concat(this.getOption('plugins')); |
534 | for (var i = 0; i < plugins.length; i++) { | |
6f5f0b2b | 535 | // the plugins option may contain either plugin classes or instances. |
835351fd DV |
536 | // Plugin instances contain an activate method. |
537 | var Plugin = plugins[i]; // either a constructor or an instance. | |
6f5f0b2b DV |
538 | var pluginInstance; |
539 | if (typeof(Plugin.activate) !== 'undefined') { | |
540 | pluginInstance = Plugin; | |
541 | } else { | |
542 | pluginInstance = new Plugin(); | |
543 | } | |
544 | ||
e2c21500 DV |
545 | var pluginDict = { |
546 | plugin: pluginInstance, | |
547 | events: {}, | |
548 | options: {}, | |
549 | pluginOptions: {} | |
550 | }; | |
551 | ||
6a4457b4 KW |
552 | var handlers = pluginInstance.activate(this); |
553 | for (var eventName in handlers) { | |
3ce712e6 | 554 | if (!handlers.hasOwnProperty(eventName)) continue; |
28aa77ac | 555 | // TODO(danvk): validate eventName. |
6a4457b4 KW |
556 | pluginDict.events[eventName] = handlers[eventName]; |
557 | } | |
e2c21500 DV |
558 | |
559 | this.plugins_.push(pluginDict); | |
560 | } | |
561 | ||
562 | // At this point, plugins can no longer register event handlers. | |
563 | // Construct a map from event -> ordered list of [callback, plugin]. | |
e2c21500 DV |
564 | for (var i = 0; i < this.plugins_.length; i++) { |
565 | var plugin_dict = this.plugins_[i]; | |
566 | for (var eventName in plugin_dict.events) { | |
567 | if (!plugin_dict.events.hasOwnProperty(eventName)) continue; | |
568 | var callback = plugin_dict.events[eventName]; | |
569 | ||
570 | var pair = [plugin_dict.plugin, callback]; | |
571 | if (!(eventName in this.eventListeners_)) { | |
572 | this.eventListeners_[eventName] = [pair]; | |
573 | } else { | |
574 | this.eventListeners_[eventName].push(pair); | |
575 | } | |
576 | } | |
577 | } | |
578 | ||
487f5523 PF |
579 | this.createDragInterface_(); |
580 | ||
738fc797 | 581 | this.start_(); |
6a1aa64f DV |
582 | }; |
583 | ||
dcb25130 | 584 | /** |
e2c21500 | 585 | * Triggers a cascade of events to the various plugins which are interested in them. |
6f5f0b2b DV |
586 | * Returns true if the "default behavior" should be prevented, i.e. if one |
587 | * of the event listeners called event.preventDefault(). | |
e2c21500 DV |
588 | * @private |
589 | */ | |
590 | Dygraph.prototype.cascadeEvents_ = function(name, extra_props) { | |
6f5f0b2b | 591 | if (!(name in this.eventListeners_)) return false; |
e2c21500 DV |
592 | |
593 | // QUESTION: can we use objects & prototypes to speed this up? | |
594 | var e = { | |
595 | dygraph: this, | |
596 | cancelable: false, | |
597 | defaultPrevented: false, | |
598 | preventDefault: function() { | |
599 | if (!e.cancelable) throw "Cannot call preventDefault on non-cancelable event."; | |
600 | e.defaultPrevented = true; | |
601 | }, | |
602 | propagationStopped: false, | |
603 | stopPropagation: function() { | |
5bd29cf4 | 604 | e.propagationStopped = true; |
e2c21500 DV |
605 | } |
606 | }; | |
607 | Dygraph.update(e, extra_props); | |
608 | ||
609 | var callback_plugin_pairs = this.eventListeners_[name]; | |
da1c187b KW |
610 | if (callback_plugin_pairs) { |
611 | for (var i = callback_plugin_pairs.length - 1; i >= 0; i--) { | |
612 | var plugin = callback_plugin_pairs[i][0]; | |
613 | var callback = callback_plugin_pairs[i][1]; | |
614 | callback.call(plugin, e); | |
615 | if (e.propagationStopped) break; | |
616 | } | |
e2c21500 DV |
617 | } |
618 | return e.defaultPrevented; | |
619 | }; | |
620 | ||
621 | /** | |
b1a96215 DV |
622 | * Fetch a plugin instance of a particular class. Only for testing. |
623 | * @private | |
624 | * @param {!Class} type The type of the plugin. | |
625 | * @return {Object} Instance of the plugin, or null if there is none. | |
626 | */ | |
627 | Dygraph.prototype.getPluginInstance_ = function(type) { | |
628 | for (var i = 0; i < this.plugins_.length; i++) { | |
629 | var p = this.plugins_[i]; | |
630 | if (p.plugin instanceof type) { | |
631 | return p.plugin; | |
632 | } | |
633 | } | |
634 | return null; | |
635 | }; | |
636 | ||
637 | /** | |
dcb25130 NN |
638 | * Returns the zoomed status of the chart for one or both axes. |
639 | * | |
640 | * Axis is an optional parameter. Can be set to 'x' or 'y'. | |
641 | * | |
642 | * The zoomed status for an axis is set whenever a user zooms using the mouse | |
42a9ebb8 DV |
643 | * or when the dateWindow or valueRange are updated (unless the |
644 | * isZoomedIgnoreProgrammaticZoom option is also specified). | |
dcb25130 | 645 | */ |
57baab03 | 646 | Dygraph.prototype.isZoomed = function(axis) { |
42a9ebb8 DV |
647 | if (axis === null || axis === undefined) { |
648 | return this.zoomed_x_ || this.zoomed_y_; | |
649 | } | |
758a629f DV |
650 | if (axis === 'x') return this.zoomed_x_; |
651 | if (axis === 'y') return this.zoomed_y_; | |
94ea5744 | 652 | throw "axis parameter is [" + axis + "] must be null, 'x' or 'y'."; |
57baab03 NN |
653 | }; |
654 | ||
629a09ae DV |
655 | /** |
656 | * Returns information about the Dygraph object, including its containing ID. | |
657 | */ | |
22bd1dfb RK |
658 | Dygraph.prototype.toString = function() { |
659 | var maindiv = this.maindiv_; | |
758a629f | 660 | var id = (maindiv && maindiv.id) ? maindiv.id : maindiv; |
22bd1dfb | 661 | return "[Dygraph " + id + "]"; |
758a629f | 662 | }; |
22bd1dfb | 663 | |
629a09ae DV |
664 | /** |
665 | * @private | |
666 | * Returns the value of an option. This may be set by the user (either in the | |
667 | * constructor or by calling updateOptions) or by dygraphs, and may be set to a | |
668 | * per-series value. | |
1bc88216 DV |
669 | * @param {string} name The name of the option, e.g. 'rollPeriod'. |
670 | * @param {string} [seriesName] The name of the series to which the option | |
629a09ae DV |
671 | * will be applied. If no per-series value of this option is available, then |
672 | * the global value is returned. This is optional. | |
673 | * @return { ... } The value of the option. | |
674 | */ | |
227b93cc | 675 | Dygraph.prototype.attr_ = function(name, seriesName) { |
103fd879 DV |
676 | if (DEBUG) { |
677 | if (typeof(Dygraph.OPTIONS_REFERENCE) === 'undefined') { | |
678 | console.error('Must include options reference JS for testing'); | |
679 | } else if (!Dygraph.OPTIONS_REFERENCE.hasOwnProperty(name)) { | |
680 | console.error('Dygraphs is using property ' + name + ', which has no ' + | |
681 | 'entry in the Dygraphs.OPTIONS_REFERENCE listing.'); | |
682 | // Only log this error once. | |
683 | Dygraph.OPTIONS_REFERENCE[name] = true; | |
684 | } | |
028ddf8a | 685 | } |
5daa462d | 686 | return seriesName ? this.attributes_.getForSeries(name, seriesName) : this.attributes_.get(name); |
285a6bda DV |
687 | }; |
688 | ||
6a1aa64f | 689 | /** |
e2c21500 DV |
690 | * Returns the current value for an option, as set in the constructor or via |
691 | * updateOptions. You may pass in an (optional) series name to get per-series | |
692 | * values for the option. | |
693 | * | |
694 | * All values returned by this method should be considered immutable. If you | |
695 | * modify them, there is no guarantee that the changes will be honored or that | |
696 | * dygraphs will remain in a consistent state. If you want to modify an option, | |
697 | * use updateOptions() instead. | |
698 | * | |
1bc88216 DV |
699 | * @param {string} name The name of the option (e.g. 'strokeWidth') |
700 | * @param {string=} opt_seriesName Series name to get per-series values. | |
701 | * @return {*} The value of the option. | |
e2c21500 DV |
702 | */ |
703 | Dygraph.prototype.getOption = function(name, opt_seriesName) { | |
704 | return this.attr_(name, opt_seriesName); | |
705 | }; | |
706 | ||
5266fc00 | 707 | /** |
1c420f2f | 708 | * Like getOption(), but specifically returns a number. |
5266fc00 DV |
709 | * This is a convenience function for working with the Closure Compiler. |
710 | * @param {string} name The name of the option (e.g. 'strokeWidth') | |
711 | * @param {string=} opt_seriesName Series name to get per-series values. | |
712 | * @return {number} The value of the option. | |
713 | * @private | |
714 | */ | |
715 | Dygraph.prototype.getNumericOption = function(name, opt_seriesName) { | |
716 | return /** @type{number} */(this.getOption(name, opt_seriesName)); | |
717 | }; | |
718 | ||
719 | /** | |
1c420f2f | 720 | * Like getOption(), but specifically returns a string. |
5266fc00 DV |
721 | * This is a convenience function for working with the Closure Compiler. |
722 | * @param {string} name The name of the option (e.g. 'strokeWidth') | |
723 | * @param {string=} opt_seriesName Series name to get per-series values. | |
724 | * @return {string} The value of the option. | |
725 | * @private | |
726 | */ | |
727 | Dygraph.prototype.getStringOption = function(name, opt_seriesName) { | |
728 | return /** @type{string} */(this.getOption(name, opt_seriesName)); | |
729 | }; | |
730 | ||
731 | /** | |
1c420f2f | 732 | * Like getOption(), but specifically returns a boolean. |
5266fc00 DV |
733 | * This is a convenience function for working with the Closure Compiler. |
734 | * @param {string} name The name of the option (e.g. 'strokeWidth') | |
735 | * @param {string=} opt_seriesName Series name to get per-series values. | |
736 | * @return {boolean} The value of the option. | |
737 | * @private | |
738 | */ | |
739 | Dygraph.prototype.getBooleanOption = function(name, opt_seriesName) { | |
740 | return /** @type{boolean} */(this.getOption(name, opt_seriesName)); | |
741 | }; | |
742 | ||
743 | /** | |
1c420f2f | 744 | * Like getOption(), but specifically returns a function. |
5266fc00 DV |
745 | * This is a convenience function for working with the Closure Compiler. |
746 | * @param {string} name The name of the option (e.g. 'strokeWidth') | |
747 | * @param {string=} opt_seriesName Series name to get per-series values. | |
748 | * @return {function(...)} The value of the option. | |
749 | * @private | |
750 | */ | |
751 | Dygraph.prototype.getFunctionOption = function(name, opt_seriesName) { | |
752 | return /** @type{function(...)} */(this.getOption(name, opt_seriesName)); | |
753 | }; | |
754 | ||
48dc3815 RK |
755 | Dygraph.prototype.getOptionForAxis = function(name, axis) { |
756 | return this.attributes_.getForAxis(name, axis); | |
83b0c192 DV |
757 | }; |
758 | ||
e2c21500 | 759 | /** |
48e614ac | 760 | * @private |
5266fc00 | 761 | * @param {string} axis The name of the axis (i.e. 'x', 'y' or 'y2') |
48e614ac DV |
762 | * @return { ... } A function mapping string -> option value |
763 | */ | |
764 | Dygraph.prototype.optionsViewForAxis_ = function(axis) { | |
765 | var self = this; | |
766 | return function(opt) { | |
758a629f | 767 | var axis_opts = self.user_attrs_.axes; |
2fd143d3 | 768 | if (axis_opts && axis_opts[axis] && axis_opts[axis].hasOwnProperty(opt)) { |
48e614ac DV |
769 | return axis_opts[axis][opt]; |
770 | } | |
5b9b2142 RK |
771 | |
772 | // I don't like that this is in a second spot. | |
773 | if (axis === 'x' && opt === 'logscale') { | |
774 | // return the default value. | |
775 | // TODO(konigsberg): pull the default from a global default. | |
776 | return false; | |
777 | } | |
778 | ||
48e614ac DV |
779 | // user-specified attributes always trump defaults, even if they're less |
780 | // specific. | |
781 | if (typeof(self.user_attrs_[opt]) != 'undefined') { | |
782 | return self.user_attrs_[opt]; | |
783 | } | |
784 | ||
758a629f | 785 | axis_opts = self.attrs_.axes; |
2fd143d3 | 786 | if (axis_opts && axis_opts[axis] && axis_opts[axis].hasOwnProperty(opt)) { |
48e614ac DV |
787 | return axis_opts[axis][opt]; |
788 | } | |
789 | // check old-style axis options | |
790 | // TODO(danvk): add a deprecation warning if either of these match. | |
791 | if (axis == 'y' && self.axes_[0].hasOwnProperty(opt)) { | |
792 | return self.axes_[0][opt]; | |
793 | } else if (axis == 'y2' && self.axes_[1].hasOwnProperty(opt)) { | |
794 | return self.axes_[1][opt]; | |
795 | } | |
796 | return self.attr_(opt); | |
797 | }; | |
798 | }; | |
799 | ||
800 | /** | |
6a1aa64f | 801 | * Returns the current rolling period, as set by the user or an option. |
1bc88216 | 802 | * @return {number} The number of points in the rolling window |
6a1aa64f | 803 | */ |
285a6bda | 804 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 805 | return this.rollPeriod_; |
76171648 DV |
806 | }; |
807 | ||
599fb4ad DV |
808 | /** |
809 | * Returns the currently-visible x-range. This can be affected by zooming, | |
810 | * panning or a call to updateOptions. | |
811 | * Returns a two-element array: [left, right]. | |
812 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
813 | */ | |
814 | Dygraph.prototype.xAxisRange = function() { | |
4cac8c7a RK |
815 | return this.dateWindow_ ? this.dateWindow_ : this.xAxisExtremes(); |
816 | }; | |
599fb4ad | 817 | |
4cac8c7a RK |
818 | /** |
819 | * Returns the lower- and upper-bound x-axis values of the | |
820 | * data set. | |
821 | */ | |
822 | Dygraph.prototype.xAxisExtremes = function() { | |
b0963cdb | 823 | var pad = this.getNumericOption('xRangePad') / this.plotter_.area.w; |
4bac38d8 | 824 | if (this.numRows() === 0) { |
fa460473 KW |
825 | return [0 - pad, 1 + pad]; |
826 | } | |
599fb4ad DV |
827 | var left = this.rawData_[0][0]; |
828 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
fa460473 KW |
829 | if (pad) { |
830 | // Must keep this in sync with dygraph-layout _evaluateLimits() | |
831 | var range = right - left; | |
832 | left -= range * pad; | |
833 | right += range * pad; | |
834 | } | |
599fb4ad DV |
835 | return [left, right]; |
836 | }; | |
837 | ||
3230c662 | 838 | /** |
d58ae307 DV |
839 | * Returns the currently-visible y-range for an axis. This can be affected by |
840 | * zooming, panning or a call to updateOptions. Axis indices are zero-based. If | |
841 | * called with no arguments, returns the range of the first axis. | |
3230c662 DV |
842 | * Returns a two-element array: [bottom, top]. |
843 | */ | |
d58ae307 | 844 | Dygraph.prototype.yAxisRange = function(idx) { |
d63e6799 | 845 | if (typeof(idx) == "undefined") idx = 0; |
d64b8fea RK |
846 | if (idx < 0 || idx >= this.axes_.length) { |
847 | return null; | |
848 | } | |
849 | var axis = this.axes_[idx]; | |
850 | return [ axis.computedValueRange[0], axis.computedValueRange[1] ]; | |
d58ae307 DV |
851 | }; |
852 | ||
853 | /** | |
854 | * Returns the currently-visible y-ranges for each axis. This can be affected by | |
855 | * zooming, panning, calls to updateOptions, etc. | |
856 | * Returns an array of [bottom, top] pairs, one for each y-axis. | |
857 | */ | |
858 | Dygraph.prototype.yAxisRanges = function() { | |
859 | var ret = []; | |
860 | for (var i = 0; i < this.axes_.length; i++) { | |
861 | ret.push(this.yAxisRange(i)); | |
862 | } | |
863 | return ret; | |
3230c662 DV |
864 | }; |
865 | ||
d58ae307 | 866 | // TODO(danvk): use these functions throughout dygraphs. |
3230c662 DV |
867 | /** |
868 | * Convert from data coordinates to canvas/div X/Y coordinates. | |
d58ae307 DV |
869 | * If specified, do this conversion for the coordinate system of a particular |
870 | * axis. Uses the first axis by default. | |
3230c662 | 871 | * Returns a two-element array: [X, Y] |
ff022deb | 872 | * |
0747928a | 873 | * Note: use toDomXCoord instead of toDomCoords(x, null) and use toDomYCoord |
ff022deb | 874 | * instead of toDomCoords(null, y, axis). |
3230c662 | 875 | */ |
d58ae307 | 876 | Dygraph.prototype.toDomCoords = function(x, y, axis) { |
ff022deb RK |
877 | return [ this.toDomXCoord(x), this.toDomYCoord(y, axis) ]; |
878 | }; | |
879 | ||
880 | /** | |
881 | * Convert from data x coordinates to canvas/div X coordinate. | |
882 | * If specified, do this conversion for the coordinate system of a particular | |
0037b2a4 RK |
883 | * axis. |
884 | * Returns a single value or null if x is null. | |
ff022deb RK |
885 | */ |
886 | Dygraph.prototype.toDomXCoord = function(x) { | |
758a629f | 887 | if (x === null) { |
ff022deb | 888 | return null; |
758a629f | 889 | } |
ff022deb | 890 | |
3230c662 | 891 | var area = this.plotter_.area; |
ff022deb RK |
892 | var xRange = this.xAxisRange(); |
893 | return area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; | |
758a629f | 894 | }; |
3230c662 | 895 | |
ff022deb RK |
896 | /** |
897 | * Convert from data x coordinates to canvas/div Y coordinate and optional | |
898 | * axis. Uses the first axis by default. | |
899 | * | |
900 | * returns a single value or null if y is null. | |
901 | */ | |
902 | Dygraph.prototype.toDomYCoord = function(y, axis) { | |
0747928a | 903 | var pct = this.toPercentYCoord(y, axis); |
3230c662 | 904 | |
758a629f | 905 | if (pct === null) { |
ff022deb RK |
906 | return null; |
907 | } | |
e4416fb9 | 908 | var area = this.plotter_.area; |
ff022deb | 909 | return area.y + pct * area.h; |
758a629f | 910 | }; |
3230c662 DV |
911 | |
912 | /** | |
913 | * Convert from canvas/div coords to data coordinates. | |
d58ae307 DV |
914 | * If specified, do this conversion for the coordinate system of a particular |
915 | * axis. Uses the first axis by default. | |
ff022deb RK |
916 | * Returns a two-element array: [X, Y]. |
917 | * | |
0747928a | 918 | * Note: use toDataXCoord instead of toDataCoords(x, null) and use toDataYCoord |
ff022deb | 919 | * instead of toDataCoords(null, y, axis). |
3230c662 | 920 | */ |
d58ae307 | 921 | Dygraph.prototype.toDataCoords = function(x, y, axis) { |
ff022deb RK |
922 | return [ this.toDataXCoord(x), this.toDataYCoord(y, axis) ]; |
923 | }; | |
924 | ||
925 | /** | |
926 | * Convert from canvas/div x coordinate to data coordinate. | |
927 | * | |
928 | * If x is null, this returns null. | |
929 | */ | |
930 | Dygraph.prototype.toDataXCoord = function(x) { | |
758a629f | 931 | if (x === null) { |
ff022deb | 932 | return null; |
3230c662 DV |
933 | } |
934 | ||
ff022deb RK |
935 | var area = this.plotter_.area; |
936 | var xRange = this.xAxisRange(); | |
5b9b2142 RK |
937 | |
938 | if (!this.attributes_.getForAxis("logscale", 'x')) { | |
939 | return xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); | |
940 | } else { | |
941 | // TODO: remove duplicate code? | |
942 | // Computing the inverse of toDomCoord. | |
943 | var pct = (x - area.x) / area.w; | |
944 | ||
945 | // Computing the inverse of toPercentXCoord. The function was arrived at with | |
946 | // the following steps: | |
947 | // | |
948 | // Original calcuation: | |
949 | // pct = (log(x) - log(xRange[0])) / (log(xRange[1]) - log(xRange[0]))); | |
950 | // | |
951 | // Multiply both sides by the right-side demoninator. | |
952 | // pct * (log(xRange[1] - log(xRange[0]))) = log(x) - log(xRange[0]) | |
953 | // | |
954 | // add log(xRange[0]) to both sides | |
955 | // log(xRange[0]) + (pct * (log(xRange[1]) - log(xRange[0])) = log(x); | |
956 | // | |
957 | // Swap both sides of the equation, | |
958 | // log(x) = log(xRange[0]) + (pct * (log(xRange[1]) - log(xRange[0])) | |
959 | // | |
960 | // Use both sides as the exponent in 10^exp and we're done. | |
961 | // x = 10 ^ (log(xRange[0]) + (pct * (log(xRange[1]) - log(xRange[0]))) | |
962 | var logr0 = Dygraph.log10(xRange[0]); | |
963 | var logr1 = Dygraph.log10(xRange[1]); | |
964 | var exponent = logr0 + (pct * (logr1 - logr0)); | |
965 | var value = Math.pow(Dygraph.LOG_SCALE, exponent); | |
966 | return value; | |
967 | } | |
ff022deb RK |
968 | }; |
969 | ||
970 | /** | |
971 | * Convert from canvas/div y coord to value. | |
972 | * | |
973 | * If y is null, this returns null. | |
974 | * if axis is null, this uses the first axis. | |
975 | */ | |
976 | Dygraph.prototype.toDataYCoord = function(y, axis) { | |
758a629f | 977 | if (y === null) { |
ff022deb | 978 | return null; |
3230c662 DV |
979 | } |
980 | ||
ff022deb RK |
981 | var area = this.plotter_.area; |
982 | var yRange = this.yAxisRange(axis); | |
983 | ||
b70247dc | 984 | if (typeof(axis) == "undefined") axis = 0; |
1f8c95d8 | 985 | if (!this.attributes_.getForAxis("logscale", axis)) { |
d9816e62 | 986 | return yRange[0] + (area.y + area.h - y) / area.h * (yRange[1] - yRange[0]); |
ff022deb RK |
987 | } else { |
988 | // Computing the inverse of toDomCoord. | |
758a629f | 989 | var pct = (y - area.y) / area.h; |
ff022deb RK |
990 | |
991 | // Computing the inverse of toPercentYCoord. The function was arrived at with | |
992 | // the following steps: | |
993 | // | |
994 | // Original calcuation: | |
5b9b2142 | 995 | // pct = (log(yRange[1]) - log(y)) / (log(yRange[1]) - log(yRange[0])); |
ff022deb | 996 | // |
5b9b2142 RK |
997 | // Multiply both sides by the right-side demoninator. |
998 | // pct * (log(yRange[1]) - log(yRange[0])) = log(yRange[1]) - log(y); | |
ff022deb | 999 | // |
5b9b2142 RK |
1000 | // subtract log(yRange[1]) from both sides. |
1001 | // (pct * (log(yRange[1]) - log(yRange[0]))) - log(yRange[1]) = -log(y); | |
ff022deb | 1002 | // |
5b9b2142 RK |
1003 | // and multiply both sides by -1. |
1004 | // log(yRange[1]) - (pct * (logr1 - log(yRange[0])) = log(y); | |
1005 | // | |
1006 | // Swap both sides of the equation, | |
1007 | // log(y) = log(yRange[1]) - (pct * (log(yRange[1]) - log(yRange[0]))); | |
1008 | // | |
1009 | // Use both sides as the exponent in 10^exp and we're done. | |
1010 | // y = 10 ^ (log(yRange[1]) - (pct * (log(yRange[1]) - log(yRange[0])))); | |
1011 | var logr0 = Dygraph.log10(yRange[0]); | |
d59b6f34 | 1012 | var logr1 = Dygraph.log10(yRange[1]); |
5b9b2142 | 1013 | var exponent = logr1 - (pct * (logr1 - logr0)); |
d59b6f34 | 1014 | var value = Math.pow(Dygraph.LOG_SCALE, exponent); |
ff022deb RK |
1015 | return value; |
1016 | } | |
3230c662 DV |
1017 | }; |
1018 | ||
e99fde05 | 1019 | /** |
ff022deb | 1020 | * Converts a y for an axis to a percentage from the top to the |
4cac8c7a | 1021 | * bottom of the drawing area. |
ff022deb RK |
1022 | * |
1023 | * If the coordinate represents a value visible on the canvas, then | |
1024 | * the value will be between 0 and 1, where 0 is the top of the canvas. | |
1025 | * However, this method will return values outside the range, as | |
1026 | * values can fall outside the canvas. | |
1027 | * | |
1028 | * If y is null, this returns null. | |
1029 | * if axis is null, this uses the first axis. | |
629a09ae | 1030 | * |
1bc88216 DV |
1031 | * @param {number} y The data y-coordinate. |
1032 | * @param {number} [axis] The axis number on which the data coordinate lives. | |
1033 | * @return {number} A fraction in [0, 1] where 0 = the top edge. | |
ff022deb RK |
1034 | */ |
1035 | Dygraph.prototype.toPercentYCoord = function(y, axis) { | |
758a629f | 1036 | if (y === null) { |
ff022deb RK |
1037 | return null; |
1038 | } | |
7d0e7a0d | 1039 | if (typeof(axis) == "undefined") axis = 0; |
ff022deb | 1040 | |
ff022deb RK |
1041 | var yRange = this.yAxisRange(axis); |
1042 | ||
1043 | var pct; | |
1761e6ed | 1044 | var logscale = this.attributes_.getForAxis("logscale", axis); |
5b9b2142 RK |
1045 | if (logscale) { |
1046 | var logr0 = Dygraph.log10(yRange[0]); | |
1047 | var logr1 = Dygraph.log10(yRange[1]); | |
1048 | pct = (logr1 - Dygraph.log10(y)) / (logr1 - logr0); | |
1049 | } else { | |
4cac8c7a RK |
1050 | // yRange[1] - y is unit distance from the bottom. |
1051 | // yRange[1] - yRange[0] is the scale of the range. | |
ff022deb RK |
1052 | // (yRange[1] - y) / (yRange[1] - yRange[0]) is the % from the bottom. |
1053 | pct = (yRange[1] - y) / (yRange[1] - yRange[0]); | |
ff022deb RK |
1054 | } |
1055 | return pct; | |
758a629f | 1056 | }; |
ff022deb RK |
1057 | |
1058 | /** | |
4cac8c7a RK |
1059 | * Converts an x value to a percentage from the left to the right of |
1060 | * the drawing area. | |
1061 | * | |
1062 | * If the coordinate represents a value visible on the canvas, then | |
1063 | * the value will be between 0 and 1, where 0 is the left of the canvas. | |
1064 | * However, this method will return values outside the range, as | |
1065 | * values can fall outside the canvas. | |
1066 | * | |
1067 | * If x is null, this returns null. | |
1bc88216 DV |
1068 | * @param {number} x The data x-coordinate. |
1069 | * @return {number} A fraction in [0, 1] where 0 = the left edge. | |
4cac8c7a RK |
1070 | */ |
1071 | Dygraph.prototype.toPercentXCoord = function(x) { | |
758a629f | 1072 | if (x === null) { |
4cac8c7a RK |
1073 | return null; |
1074 | } | |
1075 | ||
4cac8c7a | 1076 | var xRange = this.xAxisRange(); |
5b9b2142 RK |
1077 | var pct; |
1078 | var logscale = this.attributes_.getForAxis("logscale", 'x') ; | |
46fd9089 | 1079 | if (logscale === true) { // logscale can be null so we test for true explicitly. |
5b9b2142 RK |
1080 | var logr0 = Dygraph.log10(xRange[0]); |
1081 | var logr1 = Dygraph.log10(xRange[1]); | |
1082 | pct = (Dygraph.log10(x) - logr0) / (logr1 - logr0); | |
1083 | } else { | |
1084 | // x - xRange[0] is unit distance from the left. | |
1085 | // xRange[1] - xRange[0] is the scale of the range. | |
1086 | // The full expression below is the % from the left. | |
1087 | pct = (x - xRange[0]) / (xRange[1] - xRange[0]); | |
1088 | } | |
1089 | return pct; | |
629a09ae | 1090 | }; |
4cac8c7a RK |
1091 | |
1092 | /** | |
e99fde05 | 1093 | * Returns the number of columns (including the independent variable). |
1bc88216 | 1094 | * @return {number} The number of columns. |
e99fde05 DV |
1095 | */ |
1096 | Dygraph.prototype.numColumns = function() { | |
fa460473 | 1097 | if (!this.rawData_) return 0; |
395e98a3 | 1098 | return this.rawData_[0] ? this.rawData_[0].length : this.attr_("labels").length; |
e99fde05 DV |
1099 | }; |
1100 | ||
1101 | /** | |
1102 | * Returns the number of rows (excluding any header/label row). | |
1bc88216 | 1103 | * @return {number} The number of rows, less any header. |
e99fde05 DV |
1104 | */ |
1105 | Dygraph.prototype.numRows = function() { | |
fa460473 | 1106 | if (!this.rawData_) return 0; |
e99fde05 DV |
1107 | return this.rawData_.length; |
1108 | }; | |
1109 | ||
1110 | /** | |
1111 | * Returns the value in the given row and column. If the row and column exceed | |
1112 | * the bounds on the data, returns null. Also returns null if the value is | |
1113 | * missing. | |
1bc88216 DV |
1114 | * @param {number} row The row number of the data (0-based). Row 0 is the |
1115 | * first row of data, not a header row. | |
1116 | * @param {number} col The column number of the data (0-based) | |
1117 | * @return {number} The value in the specified cell or null if the row/col | |
1118 | * were out of range. | |
e99fde05 DV |
1119 | */ |
1120 | Dygraph.prototype.getValue = function(row, col) { | |
1121 | if (row < 0 || row > this.rawData_.length) return null; | |
1122 | if (col < 0 || col > this.rawData_[row].length) return null; | |
1123 | ||
1124 | return this.rawData_[row][col]; | |
1125 | }; | |
1126 | ||
629a09ae | 1127 | /** |
285a6bda | 1128 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 1129 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 1130 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
1131 | * @private |
1132 | */ | |
285a6bda | 1133 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
1134 | // Create the all-enclosing graph div |
1135 | var enclosing = this.maindiv_; | |
1136 | ||
b0c3b730 | 1137 | this.graphDiv = document.createElement("div"); |
aeca29ac | 1138 | |
e0629007 DV |
1139 | // TODO(danvk): any other styles that are useful to set here? |
1140 | this.graphDiv.style.textAlign = 'left'; // This is a CSS "reset" | |
cb8bb6a6 | 1141 | this.graphDiv.style.position = 'relative'; |
b0c3b730 DV |
1142 | enclosing.appendChild(this.graphDiv); |
1143 | ||
1144 | // Create the canvas for interactive parts of the chart. | |
f8cfec73 | 1145 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 | 1146 | this.canvas_.style.position = "absolute"; |
aeca29ac | 1147 | |
c28088bc KW |
1148 | // ... and for static parts of the chart. |
1149 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); | |
1150 | ||
2cf95fff | 1151 | this.canvas_ctx_ = Dygraph.getContext(this.canvas_); |
2cf95fff | 1152 | this.hidden_ctx_ = Dygraph.getContext(this.hidden_); |
76171648 | 1153 | |
37819481 PH |
1154 | this.resizeElements_(); |
1155 | ||
eb7bf005 EC |
1156 | // The interactive parts of the graph are drawn on top of the chart. |
1157 | this.graphDiv.appendChild(this.hidden_); | |
1158 | this.graphDiv.appendChild(this.canvas_); | |
920208fb PF |
1159 | this.mouseEventElement_ = this.createMouseEventElement_(); |
1160 | ||
1161 | // Create the grapher | |
1162 | this.layout_ = new DygraphLayout(this); | |
1163 | ||
76171648 | 1164 | var dygraph = this; |
de8f284f | 1165 | |
9fd9bbbb | 1166 | this.mouseMoveHandler_ = function(e) { |
1167 | dygraph.mouseMove_(e); | |
1168 | }; | |
de8f284f | 1169 | |
9fd9bbbb | 1170 | this.mouseOutHandler_ = function(e) { |
def24194 DV |
1171 | // The mouse has left the chart if: |
1172 | // 1. e.target is inside the chart | |
1173 | // 2. e.relatedTarget is outside the chart | |
1174 | var target = e.target || e.fromElement; | |
1175 | var relatedTarget = e.relatedTarget || e.toElement; | |
bcb545f4 LB |
1176 | if (Dygraph.isNodeContainedBy(target, dygraph.graphDiv) && |
1177 | !Dygraph.isNodeContainedBy(relatedTarget, dygraph.graphDiv)) { | |
def24194 DV |
1178 | dygraph.mouseOut_(e); |
1179 | } | |
9fd9bbbb | 1180 | }; |
1181 | ||
aeca29ac RK |
1182 | this.addAndTrackEvent(window, 'mouseout', this.mouseOutHandler_); |
1183 | this.addAndTrackEvent(this.mouseEventElement_, 'mousemove', this.mouseMoveHandler_); | |
697e70b2 | 1184 | |
9fd9bbbb | 1185 | // Don't recreate and register the resize handler on subsequent calls. |
1186 | // This happens when the graph is resized. | |
1187 | if (!this.resizeHandler_) { | |
e0b3afad RK |
1188 | this.resizeHandler_ = function(e) { |
1189 | dygraph.resize(); | |
1190 | }; | |
1c6b239c | 1191 | |
e0b3afad RK |
1192 | // Update when the window is resized. |
1193 | // TODO(danvk): drop frames depending on complexity of the chart. | |
aeca29ac | 1194 | this.addAndTrackEvent(window, 'resize', this.resizeHandler_); |
e0b3afad | 1195 | } |
4cfcc38c DV |
1196 | }; |
1197 | ||
aeca29ac RK |
1198 | Dygraph.prototype.resizeElements_ = function() { |
1199 | this.graphDiv.style.width = this.width_ + "px"; | |
1200 | this.graphDiv.style.height = this.height_ + "px"; | |
37819481 PH |
1201 | |
1202 | var canvasScale = Dygraph.getContextPixelRatio(this.canvas_ctx_); | |
1203 | this.canvas_.width = this.width_ * canvasScale; | |
1204 | this.canvas_.height = this.height_ * canvasScale; | |
aeca29ac RK |
1205 | this.canvas_.style.width = this.width_ + "px"; // for IE |
1206 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
37819481 PH |
1207 | if (canvasScale !== 1) { |
1208 | this.canvas_ctx_.scale(canvasScale, canvasScale); | |
1209 | } | |
1210 | ||
1211 | var hiddenScale = Dygraph.getContextPixelRatio(this.hidden_ctx_); | |
1212 | this.hidden_.width = this.width_ * hiddenScale; | |
1213 | this.hidden_.height = this.height_ * hiddenScale; | |
c28088bc KW |
1214 | this.hidden_.style.width = this.width_ + "px"; // for IE |
1215 | this.hidden_.style.height = this.height_ + "px"; // for IE | |
37819481 PH |
1216 | if (hiddenScale !== 1) { |
1217 | this.hidden_ctx_.scale(hiddenScale, hiddenScale); | |
1218 | } | |
f914bed1 | 1219 | }; |
aeca29ac | 1220 | |
4cfcc38c DV |
1221 | /** |
1222 | * Detach DOM elements in the dygraph and null out all data references. | |
1223 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
1224 | * usage. See, e.g., the tests/perf.html example. | |
1225 | */ | |
1226 | Dygraph.prototype.destroy = function() { | |
aeca29ac RK |
1227 | this.canvas_ctx_.restore(); |
1228 | this.hidden_ctx_.restore(); | |
1229 | ||
92c5f414 DV |
1230 | // Destroy any plugins, in the reverse order that they were registered. |
1231 | for (var i = this.plugins_.length - 1; i >= 0; i--) { | |
1232 | var p = this.plugins_.pop(); | |
1233 | if (p.plugin.destroy) p.plugin.destroy(); | |
1234 | } | |
1235 | ||
4cfcc38c DV |
1236 | var removeRecursive = function(node) { |
1237 | while (node.hasChildNodes()) { | |
1238 | removeRecursive(node.firstChild); | |
1239 | node.removeChild(node.firstChild); | |
1240 | } | |
1241 | }; | |
de8f284f | 1242 | |
aeca29ac | 1243 | this.removeTrackedEvents_(); |
6a4587ac RK |
1244 | |
1245 | // remove mouse event handlers (This may not be necessary anymore) | |
def24194 | 1246 | Dygraph.removeEvent(window, 'mouseout', this.mouseOutHandler_); |
7d6df48d | 1247 | Dygraph.removeEvent(this.mouseEventElement_, 'mousemove', this.mouseMoveHandler_); |
7d6df48d RK |
1248 | |
1249 | // remove window handlers | |
92c5f414 | 1250 | Dygraph.removeEvent(window,'resize', this.resizeHandler_); |
7d6df48d RK |
1251 | this.resizeHandler_ = null; |
1252 | ||
4cfcc38c DV |
1253 | removeRecursive(this.maindiv_); |
1254 | ||
1255 | var nullOut = function(obj) { | |
1256 | for (var n in obj) { | |
1257 | if (typeof(obj[n]) === 'object') { | |
1258 | obj[n] = null; | |
1259 | } | |
1260 | } | |
1261 | }; | |
4cfcc38c DV |
1262 | // These may not all be necessary, but it can't hurt... |
1263 | nullOut(this.layout_); | |
1264 | nullOut(this.plotter_); | |
1265 | nullOut(this); | |
1266 | }; | |
6a1aa64f DV |
1267 | |
1268 | /** | |
629a09ae DV |
1269 | * Creates the canvas on which the chart will be drawn. Only the Renderer ever |
1270 | * draws on this particular canvas. All Dygraph work (i.e. drawing hover dots | |
1271 | * or the zoom rectangles) is done on this.canvas_. | |
8846615a | 1272 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
1273 | * @return {Object} The newly-created canvas |
1274 | * @private | |
1275 | */ | |
285a6bda | 1276 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 | 1277 | var h = Dygraph.createCanvas(); |
6a1aa64f | 1278 | h.style.position = "absolute"; |
9ac5e4ae DV |
1279 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
1280 | // some extra area to make it easier to zoom in on the far left and far | |
1281 | // right. h needs to be precisely the plot area, so that clipping occurs. | |
6a1aa64f DV |
1282 | h.style.top = canvas.style.top; |
1283 | h.style.left = canvas.style.left; | |
1284 | h.width = this.width_; | |
1285 | h.height = this.height_; | |
f8cfec73 DV |
1286 | h.style.width = this.width_ + "px"; // for IE |
1287 | h.style.height = this.height_ + "px"; // for IE | |
6a1aa64f DV |
1288 | return h; |
1289 | }; | |
1290 | ||
629a09ae | 1291 | /** |
920208fb PF |
1292 | * Creates an overlay element used to handle mouse events. |
1293 | * @return {Object} The mouse event element. | |
1294 | * @private | |
1295 | */ | |
1296 | Dygraph.prototype.createMouseEventElement_ = function() { | |
1297 | if (this.isUsingExcanvas_) { | |
1298 | var elem = document.createElement("div"); | |
1299 | elem.style.position = 'absolute'; | |
1300 | elem.style.backgroundColor = 'white'; | |
1301 | elem.style.filter = 'alpha(opacity=0)'; | |
1302 | elem.style.width = this.width_ + "px"; | |
1303 | elem.style.height = this.height_ + "px"; | |
1304 | this.graphDiv.appendChild(elem); | |
1305 | return elem; | |
1306 | } else { | |
1307 | return this.canvas_; | |
1308 | } | |
1309 | }; | |
1310 | ||
1311 | /** | |
6a1aa64f DV |
1312 | * Generate a set of distinct colors for the data series. This is done with a |
1313 | * color wheel. Saturation/Value are customizable, and the hue is | |
1314 | * equally-spaced around the color wheel. If a custom set of colors is | |
1315 | * specified, that is used instead. | |
6a1aa64f DV |
1316 | * @private |
1317 | */ | |
285a6bda | 1318 | Dygraph.prototype.setColors_ = function() { |
ee53deb9 DV |
1319 | var labels = this.getLabels(); |
1320 | var num = labels.length - 1; | |
6a1aa64f | 1321 | this.colors_ = []; |
ee53deb9 | 1322 | this.colorsMap_ = {}; |
48423521 RK |
1323 | |
1324 | // These are used for when no custom colors are specified. | |
b0963cdb DV |
1325 | var sat = this.getNumericOption('colorSaturation') || 1.0; |
1326 | var val = this.getNumericOption('colorValue') || 0.5; | |
48423521 RK |
1327 | var half = Math.ceil(num / 2); |
1328 | ||
b0963cdb | 1329 | var colors = this.getOption('colors'); |
48423521 RK |
1330 | var visibility = this.visibility(); |
1331 | for (var i = 0; i < num; i++) { | |
1332 | if (!visibility[i]) { | |
1333 | continue; | |
1334 | } | |
1335 | var label = labels[i + 1]; | |
1336 | var colorStr = this.attributes_.getForSeries('color', label); | |
1337 | if (!colorStr) { | |
1338 | if (colors) { | |
1339 | colorStr = colors[i % colors.length]; | |
1340 | } else { | |
1341 | // alternate colors for high contrast. | |
1342 | var idx = i % 2 ? (half + (i + 1)/ 2) : Math.ceil((i + 1) / 2); | |
1343 | var hue = (1.0 * idx / (1 + num)); | |
1344 | colorStr = Dygraph.hsvToRGB(hue, sat, val); | |
1345 | } | |
1346 | } | |
1347 | this.colors_.push(colorStr); | |
1348 | this.colorsMap_[label] = colorStr; | |
1349 | } | |
629a09ae | 1350 | }; |
6a1aa64f | 1351 | |
43af96e7 NK |
1352 | /** |
1353 | * Return the list of colors. This is either the list of colors passed in the | |
629a09ae | 1354 | * attributes or the autogenerated list of rgb(r,g,b) strings. |
e2c21500 | 1355 | * This does not return colors for invisible series. |
8ef9d44d | 1356 | * @return {Array.<string>} The list of colors. |
43af96e7 NK |
1357 | */ |
1358 | Dygraph.prototype.getColors = function() { | |
1359 | return this.colors_; | |
1360 | }; | |
1361 | ||
6a1aa64f | 1362 | /** |
e2c21500 DV |
1363 | * Returns a few attributes of a series, i.e. its color, its visibility, which |
1364 | * axis it's assigned to, and its column in the original data. | |
1365 | * Returns null if the series does not exist. | |
1366 | * Otherwise, returns an object with column, visibility, color and axis properties. | |
1367 | * The "axis" property will be set to 1 for y1 and 2 for y2. | |
1368 | * The "column" property can be fed back into getValue(row, column) to get | |
1369 | * values for this series. | |
6a1aa64f | 1370 | */ |
e2c21500 DV |
1371 | Dygraph.prototype.getPropertiesForSeries = function(series_name) { |
1372 | var idx = -1; | |
1373 | var labels = this.getLabels(); | |
1374 | for (var i = 1; i < labels.length; i++) { | |
1375 | if (labels[i] == series_name) { | |
1376 | idx = i; | |
1377 | break; | |
b0c3b730 | 1378 | } |
6a1aa64f | 1379 | } |
e2c21500 | 1380 | if (idx == -1) return null; |
0abfbd7e | 1381 | |
e2c21500 DV |
1382 | return { |
1383 | name: series_name, | |
1384 | column: idx, | |
1385 | visible: this.visibility()[idx - 1], | |
189f8030 | 1386 | color: this.colorsMap_[series_name], |
16f00742 | 1387 | axis: 1 + this.attributes_.axisForSeries(series_name) |
e2c21500 | 1388 | }; |
0abfbd7e DV |
1389 | }; |
1390 | ||
1391 | /** | |
6a1aa64f | 1392 | * Create the text box to adjust the averaging period |
6a1aa64f DV |
1393 | * @private |
1394 | */ | |
285a6bda | 1395 | Dygraph.prototype.createRollInterface_ = function() { |
8c69de65 DV |
1396 | // Create a roller if one doesn't exist already. |
1397 | if (!this.roller_) { | |
1398 | this.roller_ = document.createElement("input"); | |
1399 | this.roller_.type = "text"; | |
1400 | this.roller_.style.display = "none"; | |
1401 | this.graphDiv.appendChild(this.roller_); | |
1402 | } | |
1403 | ||
b0963cdb | 1404 | var display = this.getBooleanOption('showRoller') ? 'block' : 'none'; |
26ca7938 | 1405 | |
0c38f187 | 1406 | var area = this.plotter_.area; |
b0c3b730 DV |
1407 | var textAttr = { "position": "absolute", |
1408 | "zIndex": 10, | |
0c38f187 DV |
1409 | "top": (area.y + area.h - 25) + "px", |
1410 | "left": (area.x + 1) + "px", | |
b0c3b730 | 1411 | "display": display |
6a1aa64f | 1412 | }; |
8c69de65 DV |
1413 | this.roller_.size = "2"; |
1414 | this.roller_.value = this.rollPeriod_; | |
b0c3b730 | 1415 | for (var name in textAttr) { |
85b99f0b | 1416 | if (textAttr.hasOwnProperty(name)) { |
8c69de65 | 1417 | this.roller_.style[name] = textAttr[name]; |
85b99f0b | 1418 | } |
b0c3b730 DV |
1419 | } |
1420 | ||
76171648 | 1421 | var dygraph = this; |
8c69de65 | 1422 | this.roller_.onchange = function() { dygraph.adjustRoll(dygraph.roller_.value); }; |
76171648 DV |
1423 | }; |
1424 | ||
629a09ae | 1425 | /** |
062ef401 JB |
1426 | * Set up all the mouse handlers needed to capture dragging behavior for zoom |
1427 | * events. | |
1428 | * @private | |
1429 | */ | |
1430 | Dygraph.prototype.createDragInterface_ = function() { | |
1431 | var context = { | |
1432 | // Tracks whether the mouse is down right now | |
1433 | isZooming: false, | |
1434 | isPanning: false, // is this drag part of a pan? | |
1435 | is2DPan: false, // if so, is that pan 1- or 2-dimensional? | |
8442269f RK |
1436 | dragStartX: null, // pixel coordinates |
1437 | dragStartY: null, // pixel coordinates | |
1438 | dragEndX: null, // pixel coordinates | |
1439 | dragEndY: null, // pixel coordinates | |
062ef401 | 1440 | dragDirection: null, |
8442269f RK |
1441 | prevEndX: null, // pixel coordinates |
1442 | prevEndY: null, // pixel coordinates | |
062ef401 | 1443 | prevDragDirection: null, |
421f1773 | 1444 | cancelNextDblclick: false, // see comment in dygraph-interaction-model.js |
062ef401 | 1445 | |
ec291cbe RK |
1446 | // The value on the left side of the graph when a pan operation starts. |
1447 | initialLeftmostDate: null, | |
1448 | ||
1449 | // The number of units each pixel spans. (This won't be valid for log | |
1450 | // scales) | |
1451 | xUnitsPerPixel: null, | |
062ef401 JB |
1452 | |
1453 | // TODO(danvk): update this comment | |
1454 | // The range in second/value units that the viewport encompasses during a | |
1455 | // panning operation. | |
1456 | dateRange: null, | |
1457 | ||
8442269f RK |
1458 | // Top-left corner of the canvas, in DOM coords |
1459 | // TODO(konigsberg): Rename topLeftCanvasX, topLeftCanvasY. | |
062ef401 JB |
1460 | px: 0, |
1461 | py: 0, | |
1462 | ||
965a030e | 1463 | // Values for use with panEdgeFraction, which limit how far outside the |
4cac8c7a RK |
1464 | // graph's data boundaries it can be panned. |
1465 | boundedDates: null, // [minDate, maxDate] | |
1466 | boundedValues: null, // [[minValue, maxValue] ...] | |
1467 | ||
2bad4d92 DV |
1468 | // We cover iframes during mouse interactions. See comments in |
1469 | // dygraph-utils.js for more info on why this is a good idea. | |
1470 | tarp: new Dygraph.IFrameTarp(), | |
1471 | ||
6a4587ac RK |
1472 | // contextB is the same thing as this context object but renamed. |
1473 | initializeMouseDown: function(event, g, contextB) { | |
062ef401 JB |
1474 | // prevents mouse drags from selecting page text. |
1475 | if (event.preventDefault) { | |
1476 | event.preventDefault(); // Firefox, Chrome, etc. | |
6a1aa64f | 1477 | } else { |
062ef401 JB |
1478 | event.returnValue = false; // IE |
1479 | event.cancelBubble = true; | |
6a1aa64f DV |
1480 | } |
1481 | ||
f381ac71 | 1482 | var canvasPos = Dygraph.findPos(g.canvas_); |
464b5f50 DV |
1483 | contextB.px = canvasPos.x; |
1484 | contextB.py = canvasPos.y; | |
806f92c1 DV |
1485 | contextB.dragStartX = Dygraph.dragGetX_(event, contextB); |
1486 | contextB.dragStartY = Dygraph.dragGetY_(event, contextB); | |
6a4587ac | 1487 | contextB.cancelNextDblclick = false; |
2bad4d92 | 1488 | contextB.tarp.cover(); |
3f50dabb DV |
1489 | }, |
1490 | destroy: function() { | |
1491 | var context = this; | |
1492 | if (context.isZooming || context.isPanning) { | |
1493 | context.isZooming = false; | |
1494 | context.dragStartX = null; | |
1495 | context.dragStartY = null; | |
1496 | } | |
1497 | ||
1498 | if (context.isPanning) { | |
1499 | context.isPanning = false; | |
1500 | context.draggingDate = null; | |
1501 | context.dateRange = null; | |
1502 | for (var i = 0; i < self.axes_.length; i++) { | |
1503 | delete self.axes_[i].draggingValue; | |
1504 | delete self.axes_[i].dragValueRange; | |
1505 | } | |
1506 | } | |
1507 | ||
1508 | context.tarp.uncover(); | |
6a1aa64f | 1509 | } |
062ef401 | 1510 | }; |
2b188b3d | 1511 | |
b0963cdb | 1512 | var interactionModel = this.getOption("interactionModel"); |
8b83c6cc | 1513 | |
062ef401 JB |
1514 | // Self is the graph. |
1515 | var self = this; | |
6faebb69 | 1516 | |
062ef401 JB |
1517 | // Function that binds the graph and context to the handler. |
1518 | var bindHandler = function(handler) { | |
1519 | return function(event) { | |
1520 | handler(event, self, context); | |
1521 | }; | |
1522 | }; | |
1523 | ||
1524 | for (var eventName in interactionModel) { | |
1525 | if (!interactionModel.hasOwnProperty(eventName)) continue; | |
aeca29ac | 1526 | this.addAndTrackEvent(this.mouseEventElement_, eventName, |
062ef401 JB |
1527 | bindHandler(interactionModel[eventName])); |
1528 | } | |
1529 | ||
1530 | // If the user releases the mouse button during a drag, but not over the | |
1531 | // canvas, then it doesn't count as a zooming action. | |
3f50dabb DV |
1532 | if (!interactionModel.willDestroyContextMyself) { |
1533 | var mouseUpHandler = function(event) { | |
1534 | context.destroy(); | |
1535 | }; | |
cb1261cb | 1536 | |
3f50dabb DV |
1537 | this.addAndTrackEvent(document, 'mouseup', mouseUpHandler); |
1538 | } | |
6a1aa64f DV |
1539 | }; |
1540 | ||
1541 | /** | |
1542 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
1543 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
1544 | * avoid extra redrawing, but it's tricky to avoid interactions with the status | |
1545 | * dots. | |
ccd9d7c2 | 1546 | * |
1bc88216 DV |
1547 | * @param {number} direction the direction of the zoom rectangle. Acceptable |
1548 | * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL. | |
1549 | * @param {number} startX The X position where the drag started, in canvas | |
1550 | * coordinates. | |
1551 | * @param {number} endX The current X position of the drag, in canvas coords. | |
1552 | * @param {number} startY The Y position where the drag started, in canvas | |
1553 | * coordinates. | |
1554 | * @param {number} endY The current Y position of the drag, in canvas coords. | |
1555 | * @param {number} prevDirection the value of direction on the previous call to | |
1556 | * this function. Used to avoid excess redrawing | |
1557 | * @param {number} prevEndX The value of endX on the previous call to this | |
1558 | * function. Used to avoid excess redrawing | |
1559 | * @param {number} prevEndY The value of endY on the previous call to this | |
1560 | * function. Used to avoid excess redrawing | |
6a1aa64f DV |
1561 | * @private |
1562 | */ | |
7201b11e JB |
1563 | Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY, |
1564 | endY, prevDirection, prevEndX, | |
1565 | prevEndY) { | |
2cf95fff | 1566 | var ctx = this.canvas_ctx_; |
6a1aa64f DV |
1567 | |
1568 | // Clean up from the previous rect if necessary | |
39b0e098 | 1569 | if (prevDirection == Dygraph.HORIZONTAL) { |
fa54c193 FXB |
1570 | ctx.clearRect(Math.min(startX, prevEndX), this.layout_.getPlotArea().y, |
1571 | Math.abs(startX - prevEndX), this.layout_.getPlotArea().h); | |
383d8473 | 1572 | } else if (prevDirection == Dygraph.VERTICAL) { |
fa54c193 FXB |
1573 | ctx.clearRect(this.layout_.getPlotArea().x, Math.min(startY, prevEndY), |
1574 | this.layout_.getPlotArea().w, Math.abs(startY - prevEndY)); | |
6a1aa64f DV |
1575 | } |
1576 | ||
1577 | // Draw a light-grey rectangle to show the new viewing area | |
39b0e098 | 1578 | if (direction == Dygraph.HORIZONTAL) { |
8b83c6cc RK |
1579 | if (endX && startX) { |
1580 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
fa54c193 FXB |
1581 | ctx.fillRect(Math.min(startX, endX), this.layout_.getPlotArea().y, |
1582 | Math.abs(endX - startX), this.layout_.getPlotArea().h); | |
8b83c6cc | 1583 | } |
920208fb | 1584 | } else if (direction == Dygraph.VERTICAL) { |
8b83c6cc RK |
1585 | if (endY && startY) { |
1586 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
fa54c193 FXB |
1587 | ctx.fillRect(this.layout_.getPlotArea().x, Math.min(startY, endY), |
1588 | this.layout_.getPlotArea().w, Math.abs(endY - startY)); | |
8b83c6cc | 1589 | } |
6a1aa64f | 1590 | } |
920208fb PF |
1591 | |
1592 | if (this.isUsingExcanvas_) { | |
1593 | this.currentZoomRectArgs_ = [direction, startX, endX, startY, endY, 0, 0, 0]; | |
1594 | } | |
1595 | }; | |
1596 | ||
1597 | /** | |
1598 | * Clear the zoom rectangle (and perform no zoom). | |
1599 | * @private | |
1600 | */ | |
1601 | Dygraph.prototype.clearZoomRect_ = function() { | |
1602 | this.currentZoomRectArgs_ = null; | |
7c39bb3a | 1603 | this.canvas_ctx_.clearRect(0, 0, this.width_, this.height_); |
6a1aa64f DV |
1604 | }; |
1605 | ||
1606 | /** | |
8b83c6cc RK |
1607 | * Zoom to something containing [lowX, highX]. These are pixel coordinates in |
1608 | * the canvas. The exact zoom window may be slightly larger if there are no data | |
1609 | * points near lowX or highX. Don't confuse this function with doZoomXDates, | |
1610 | * which accepts dates that match the raw data. This function redraws the graph. | |
d58ae307 | 1611 | * |
1bc88216 DV |
1612 | * @param {number} lowX The leftmost pixel value that should be visible. |
1613 | * @param {number} highX The rightmost pixel value that should be visible. | |
6a1aa64f DV |
1614 | * @private |
1615 | */ | |
8b83c6cc | 1616 | Dygraph.prototype.doZoomX_ = function(lowX, highX) { |
920208fb | 1617 | this.currentZoomRectArgs_ = null; |
6a1aa64f | 1618 | // Find the earliest and latest dates contained in this canvasx range. |
8b83c6cc | 1619 | // Convert the call to date ranges of the raw data. |
ff022deb RK |
1620 | var minDate = this.toDataXCoord(lowX); |
1621 | var maxDate = this.toDataXCoord(highX); | |
8b83c6cc RK |
1622 | this.doZoomXDates_(minDate, maxDate); |
1623 | }; | |
6a1aa64f | 1624 | |
8b83c6cc RK |
1625 | /** |
1626 | * Zoom to something containing [minDate, maxDate] values. Don't confuse this | |
1627 | * method with doZoomX which accepts pixel coordinates. This function redraws | |
1628 | * the graph. | |
d58ae307 | 1629 | * |
1bc88216 DV |
1630 | * @param {number} minDate The minimum date that should be visible. |
1631 | * @param {number} maxDate The maximum date that should be visible. | |
8b83c6cc RK |
1632 | * @private |
1633 | */ | |
1634 | Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) { | |
5b9b2142 RK |
1635 | // TODO(danvk): when xAxisRange is null (i.e. "fit to data", the animation |
1636 | // can produce strange effects. Rather than the x-axis transitioning slowly | |
b1a3b195 DV |
1637 | // between values, it can jerk around.) |
1638 | var old_window = this.xAxisRange(); | |
1639 | var new_window = [minDate, maxDate]; | |
57baab03 | 1640 | this.zoomed_x_ = true; |
b1a3b195 DV |
1641 | var that = this; |
1642 | this.doAnimatedZoom(old_window, new_window, null, null, function() { | |
b0963cdb | 1643 | if (that.getFunctionOption("zoomCallback")) { |
4ee251cb | 1644 | that.getFunctionOption("zoomCallback").call(that, |
b0963cdb | 1645 | minDate, maxDate, that.yAxisRanges()); |
b1a3b195 DV |
1646 | } |
1647 | }); | |
8b83c6cc RK |
1648 | }; |
1649 | ||
1650 | /** | |
1651 | * Zoom to something containing [lowY, highY]. These are pixel coordinates in | |
d58ae307 DV |
1652 | * the canvas. This function redraws the graph. |
1653 | * | |
1bc88216 DV |
1654 | * @param {number} lowY The topmost pixel value that should be visible. |
1655 | * @param {number} highY The lowest pixel value that should be visible. | |
8b83c6cc RK |
1656 | * @private |
1657 | */ | |
1658 | Dygraph.prototype.doZoomY_ = function(lowY, highY) { | |
920208fb | 1659 | this.currentZoomRectArgs_ = null; |
d58ae307 DV |
1660 | // Find the highest and lowest values in pixel range for each axis. |
1661 | // Note that lowY (in pixels) corresponds to the max Value (in data coords). | |
1662 | // This is because pixels increase as you go down on the screen, whereas data | |
1663 | // coordinates increase as you go up the screen. | |
b1a3b195 DV |
1664 | var oldValueRanges = this.yAxisRanges(); |
1665 | var newValueRanges = []; | |
d58ae307 | 1666 | for (var i = 0; i < this.axes_.length; i++) { |
ff022deb RK |
1667 | var hi = this.toDataYCoord(lowY, i); |
1668 | var low = this.toDataYCoord(highY, i); | |
b1a3b195 | 1669 | newValueRanges.push([low, hi]); |
d58ae307 | 1670 | } |
8b83c6cc | 1671 | |
57baab03 | 1672 | this.zoomed_y_ = true; |
b1a3b195 DV |
1673 | var that = this; |
1674 | this.doAnimatedZoom(null, null, oldValueRanges, newValueRanges, function() { | |
b0963cdb | 1675 | if (that.getFunctionOption("zoomCallback")) { |
b1a3b195 | 1676 | var xRange = that.xAxisRange(); |
4ee251cb | 1677 | that.getFunctionOption("zoomCallback").call(that, |
b0963cdb | 1678 | xRange[0], xRange[1], that.yAxisRanges()); |
b1a3b195 DV |
1679 | } |
1680 | }); | |
8b83c6cc RK |
1681 | }; |
1682 | ||
1683 | /** | |
5b9b2142 RK |
1684 | * Transition function to use in animations. Returns values between 0.0 |
1685 | * (totally old values) and 1.0 (totally new values) for each frame. | |
1686 | * @private | |
1687 | */ | |
1688 | Dygraph.zoomAnimationFunction = function(frame, numFrames) { | |
1689 | var k = 1.5; | |
1690 | return (1.0 - Math.pow(k, -frame)) / (1.0 - Math.pow(k, -numFrames)); | |
1691 | }; | |
1692 | ||
1693 | /** | |
8b83c6cc RK |
1694 | * Reset the zoom to the original view coordinates. This is the same as |
1695 | * double-clicking on the graph. | |
8b83c6cc | 1696 | */ |
e4f6e11a | 1697 | Dygraph.prototype.resetZoom = function() { |
b1a3b195 | 1698 | var dirty = false, dirtyX = false, dirtyY = false; |
758a629f | 1699 | if (this.dateWindow_ !== null) { |
d58ae307 | 1700 | dirty = true; |
b1a3b195 | 1701 | dirtyX = true; |
8b83c6cc | 1702 | } |
d58ae307 DV |
1703 | |
1704 | for (var i = 0; i < this.axes_.length; i++) { | |
1f6a6254 | 1705 | if (typeof(this.axes_[i].valueWindow) !== 'undefined' && this.axes_[i].valueWindow !== null) { |
d58ae307 | 1706 | dirty = true; |
b1a3b195 | 1707 | dirtyY = true; |
d58ae307 | 1708 | } |
8b83c6cc RK |
1709 | } |
1710 | ||
da1369a5 DV |
1711 | // Clear any selection, since it's likely to be drawn in the wrong place. |
1712 | this.clearSelection(); | |
1713 | ||
8b83c6cc | 1714 | if (dirty) { |
57baab03 NN |
1715 | this.zoomed_x_ = false; |
1716 | this.zoomed_y_ = false; | |
b1a3b195 DV |
1717 | |
1718 | var minDate = this.rawData_[0][0]; | |
1719 | var maxDate = this.rawData_[this.rawData_.length - 1][0]; | |
1720 | ||
1721 | // With only one frame, don't bother calculating extreme ranges. | |
1722 | // TODO(danvk): merge this block w/ the code below. | |
b0963cdb | 1723 | if (!this.getBooleanOption("animatedZooms")) { |
b1a3b195 | 1724 | this.dateWindow_ = null; |
758a629f DV |
1725 | for (i = 0; i < this.axes_.length; i++) { |
1726 | if (this.axes_[i].valueWindow !== null) { | |
b1a3b195 DV |
1727 | delete this.axes_[i].valueWindow; |
1728 | } | |
1729 | } | |
1730 | this.drawGraph_(); | |
b0963cdb | 1731 | if (this.getFunctionOption("zoomCallback")) { |
4ee251cb | 1732 | this.getFunctionOption("zoomCallback").call(this, |
b0963cdb | 1733 | minDate, maxDate, this.yAxisRanges()); |
b1a3b195 DV |
1734 | } |
1735 | return; | |
1736 | } | |
1737 | ||
1738 | var oldWindow=null, newWindow=null, oldValueRanges=null, newValueRanges=null; | |
1739 | if (dirtyX) { | |
1740 | oldWindow = this.xAxisRange(); | |
1741 | newWindow = [minDate, maxDate]; | |
1742 | } | |
1743 | ||
1744 | if (dirtyY) { | |
1745 | oldValueRanges = this.yAxisRanges(); | |
1746 | // TODO(danvk): this is pretty inefficient | |
1747 | var packed = this.gatherDatasets_(this.rolledSeries_, null); | |
30a5cfc6 | 1748 | var extremes = packed.extremes; |
b1a3b195 DV |
1749 | |
1750 | // this has the side-effect of modifying this.axes_. | |
1751 | // this doesn't make much sense in this context, but it's convenient (we | |
1752 | // need this.axes_[*].extremeValues) and not harmful since we'll be | |
1753 | // calling drawGraph_ shortly, which clobbers these values. | |
1754 | this.computeYAxisRanges_(extremes); | |
1755 | ||
1756 | newValueRanges = []; | |
758a629f | 1757 | for (i = 0; i < this.axes_.length; i++) { |
1f6a6254 | 1758 | var axis = this.axes_[i]; |
681a215e DV |
1759 | newValueRanges.push((axis.valueRange !== null && |
1760 | axis.valueRange !== undefined) ? | |
42a9ebb8 | 1761 | axis.valueRange : axis.extremeRange); |
b1a3b195 DV |
1762 | } |
1763 | } | |
1764 | ||
1765 | var that = this; | |
1766 | this.doAnimatedZoom(oldWindow, newWindow, oldValueRanges, newValueRanges, | |
1767 | function() { | |
1768 | that.dateWindow_ = null; | |
1769 | for (var i = 0; i < that.axes_.length; i++) { | |
758a629f | 1770 | if (that.axes_[i].valueWindow !== null) { |
b1a3b195 DV |
1771 | delete that.axes_[i].valueWindow; |
1772 | } | |
1773 | } | |
b0963cdb | 1774 | if (that.getFunctionOption("zoomCallback")) { |
4ee251cb | 1775 | that.getFunctionOption("zoomCallback").call(that, |
b0963cdb | 1776 | minDate, maxDate, that.yAxisRanges()); |
b1a3b195 DV |
1777 | } |
1778 | }); | |
1779 | } | |
1780 | }; | |
1781 | ||
1782 | /** | |
1783 | * Combined animation logic for all zoom functions. | |
1784 | * either the x parameters or y parameters may be null. | |
1785 | * @private | |
1786 | */ | |
1787 | Dygraph.prototype.doAnimatedZoom = function(oldXRange, newXRange, oldYRanges, newYRanges, callback) { | |
b0963cdb DV |
1788 | var steps = this.getBooleanOption("animatedZooms") ? |
1789 | Dygraph.ANIMATION_STEPS : 1; | |
b1a3b195 DV |
1790 | |
1791 | var windows = []; | |
1792 | var valueRanges = []; | |
758a629f | 1793 | var step, frac; |
b1a3b195 | 1794 | |
758a629f DV |
1795 | if (oldXRange !== null && newXRange !== null) { |
1796 | for (step = 1; step <= steps; step++) { | |
1797 | frac = Dygraph.zoomAnimationFunction(step, steps); | |
b1a3b195 DV |
1798 | windows[step-1] = [oldXRange[0]*(1-frac) + frac*newXRange[0], |
1799 | oldXRange[1]*(1-frac) + frac*newXRange[1]]; | |
8b83c6cc | 1800 | } |
67e650dc | 1801 | } |
b1a3b195 | 1802 | |
758a629f DV |
1803 | if (oldYRanges !== null && newYRanges !== null) { |
1804 | for (step = 1; step <= steps; step++) { | |
1805 | frac = Dygraph.zoomAnimationFunction(step, steps); | |
b1a3b195 DV |
1806 | var thisRange = []; |
1807 | for (var j = 0; j < this.axes_.length; j++) { | |
1808 | thisRange.push([oldYRanges[j][0]*(1-frac) + frac*newYRanges[j][0], | |
1809 | oldYRanges[j][1]*(1-frac) + frac*newYRanges[j][1]]); | |
1810 | } | |
1811 | valueRanges[step-1] = thisRange; | |
1812 | } | |
1813 | } | |
1814 | ||
1815 | var that = this; | |
1816 | Dygraph.repeatAndCleanup(function(step) { | |
1817 | if (valueRanges.length) { | |
1818 | for (var i = 0; i < that.axes_.length; i++) { | |
1819 | var w = valueRanges[step][i]; | |
1820 | that.axes_[i].valueWindow = [w[0], w[1]]; | |
1821 | } | |
1822 | } | |
1823 | if (windows.length) { | |
1824 | that.dateWindow_ = windows[step]; | |
1825 | } | |
1826 | that.drawGraph_(); | |
1827 | }, steps, Dygraph.ANIMATION_DURATION / steps, callback); | |
6a1aa64f DV |
1828 | }; |
1829 | ||
1830 | /** | |
857a6931 KW |
1831 | * Get the current graph's area object. |
1832 | * | |
1833 | * Returns: {x, y, w, h} | |
6a1aa64f | 1834 | */ |
857a6931 KW |
1835 | Dygraph.prototype.getArea = function() { |
1836 | return this.plotter_.area; | |
1837 | }; | |
e863a17d | 1838 | |
857a6931 KW |
1839 | /** |
1840 | * Convert a mouse event to DOM coordinates relative to the graph origin. | |
1841 | * | |
1842 | * Returns a two-element array: [X, Y]. | |
1843 | */ | |
1844 | Dygraph.prototype.eventToDomCoords = function(event) { | |
abc8c570 RK |
1845 | if (event.offsetX && event.offsetY) { |
1846 | return [ event.offsetX, event.offsetY ]; | |
1847 | } else { | |
4d9f1cb9 | 1848 | var eventElementPos = Dygraph.findPos(this.mouseEventElement_); |
464b5f50 DV |
1849 | var canvasx = Dygraph.pageX(event) - eventElementPos.x; |
1850 | var canvasy = Dygraph.pageY(event) - eventElementPos.y; | |
abc8c570 RK |
1851 | return [canvasx, canvasy]; |
1852 | } | |
857a6931 | 1853 | }; |
4cac8c7a | 1854 | |
857a6931 KW |
1855 | /** |
1856 | * Given a canvas X coordinate, find the closest row. | |
1bc88216 DV |
1857 | * @param {number} domX graph-relative DOM X coordinate |
1858 | * Returns {number} row number. | |
857a6931 KW |
1859 | * @private |
1860 | */ | |
1861 | Dygraph.prototype.findClosestRow = function(domX) { | |
81cb07d6 | 1862 | var minDistX = Infinity; |
a703cbdf | 1863 | var closestRow = -1; |
a12a78ae DV |
1864 | var sets = this.layout_.points; |
1865 | for (var i = 0; i < sets.length; i++) { | |
1866 | var points = sets[i]; | |
1867 | var len = points.length; | |
1868 | for (var j = 0; j < len; j++) { | |
1869 | var point = points[j]; | |
1870 | if (!Dygraph.isValidPoint(point, true)) continue; | |
1871 | var dist = Math.abs(point.canvasx - domX); | |
1872 | if (dist < minDistX) { | |
1873 | minDistX = dist; | |
a703cbdf | 1874 | closestRow = point.idx; |
a12a78ae | 1875 | } |
a937d031 | 1876 | } |
6a1aa64f | 1877 | } |
a12a78ae | 1878 | |
a703cbdf | 1879 | return closestRow; |
857a6931 | 1880 | }; |
6a1aa64f | 1881 | |
857a6931 | 1882 | /** |
2a02e5dd KW |
1883 | * Given canvas X,Y coordinates, find the closest point. |
1884 | * | |
1885 | * This finds the individual data point across all visible series | |
1886 | * that's closest to the supplied DOM coordinates using the standard | |
1887 | * Euclidean X,Y distance. | |
1888 | * | |
1bc88216 DV |
1889 | * @param {number} domX graph-relative DOM X coordinate |
1890 | * @param {number} domY graph-relative DOM Y coordinate | |
857a6931 KW |
1891 | * Returns: {row, seriesName, point} |
1892 | * @private | |
1893 | */ | |
1894 | Dygraph.prototype.findClosestPoint = function(domX, domY) { | |
81cb07d6 | 1895 | var minDist = Infinity; |
55231c07 | 1896 | var dist, dx, dy, point, closestPoint, closestSeries, closestRow; |
30a5cfc6 | 1897 | for ( var setIdx = this.layout_.points.length - 1 ; setIdx >= 0 ; --setIdx ) { |
a12a78ae DV |
1898 | var points = this.layout_.points[setIdx]; |
1899 | for (var i = 0; i < points.length; ++i) { | |
55231c07 | 1900 | point = points[i]; |
62c3d2fd | 1901 | if (!Dygraph.isValidPoint(point)) continue; |
857a6931 KW |
1902 | dx = point.canvasx - domX; |
1903 | dy = point.canvasy - domY; | |
1904 | dist = dx * dx + dy * dy; | |
81cb07d6 | 1905 | if (dist < minDist) { |
62c3d2fd | 1906 | minDist = dist; |
a937d031 KW |
1907 | closestPoint = point; |
1908 | closestSeries = setIdx; | |
55231c07 | 1909 | closestRow = point.idx; |
a937d031 | 1910 | } |
857a6931 KW |
1911 | } |
1912 | } | |
1913 | var name = this.layout_.setNames[closestSeries]; | |
1914 | return { | |
55231c07 | 1915 | row: closestRow, |
857a6931 KW |
1916 | seriesName: name, |
1917 | point: closestPoint | |
1918 | }; | |
1919 | }; | |
1920 | ||
1921 | /** | |
1922 | * Given canvas X,Y coordinates, find the touched area in a stacked graph. | |
2a02e5dd KW |
1923 | * |
1924 | * This first finds the X data point closest to the supplied DOM X coordinate, | |
1925 | * then finds the series which puts the Y coordinate on top of its filled area, | |
1926 | * using linear interpolation between adjacent point pairs. | |
1927 | * | |
1bc88216 DV |
1928 | * @param {number} domX graph-relative DOM X coordinate |
1929 | * @param {number} domY graph-relative DOM Y coordinate | |
857a6931 KW |
1930 | * Returns: {row, seriesName, point} |
1931 | * @private | |
1932 | */ | |
1933 | Dygraph.prototype.findStackedPoint = function(domX, domY) { | |
1934 | var row = this.findClosestRow(domX); | |
857a6931 | 1935 | var closestPoint, closestSeries; |
30a5cfc6 | 1936 | for (var setIdx = 0; setIdx < this.layout_.points.length; ++setIdx) { |
55231c07 DE |
1937 | var boundary = this.getLeftBoundary_(setIdx); |
1938 | var rowIdx = row - boundary; | |
a12a78ae DV |
1939 | var points = this.layout_.points[setIdx]; |
1940 | if (rowIdx >= points.length) continue; | |
1941 | var p1 = points[rowIdx]; | |
62c3d2fd | 1942 | if (!Dygraph.isValidPoint(p1)) continue; |
857a6931 | 1943 | var py = p1.canvasy; |
a12a78ae | 1944 | if (domX > p1.canvasx && rowIdx + 1 < points.length) { |
857a6931 | 1945 | // interpolate series Y value using next point |
a12a78ae | 1946 | var p2 = points[rowIdx + 1]; |
62c3d2fd KW |
1947 | if (Dygraph.isValidPoint(p2)) { |
1948 | var dx = p2.canvasx - p1.canvasx; | |
1949 | if (dx > 0) { | |
1950 | var r = (domX - p1.canvasx) / dx; | |
1951 | py += r * (p2.canvasy - p1.canvasy); | |
1952 | } | |
416b05ad | 1953 | } |
81cb07d6 | 1954 | } else if (domX < p1.canvasx && rowIdx > 0) { |
857a6931 | 1955 | // interpolate series Y value using previous point |
a12a78ae | 1956 | var p0 = points[rowIdx - 1]; |
62c3d2fd KW |
1957 | if (Dygraph.isValidPoint(p0)) { |
1958 | var dx = p1.canvasx - p0.canvasx; | |
1959 | if (dx > 0) { | |
1960 | var r = (p1.canvasx - domX) / dx; | |
1961 | py += r * (p0.canvasy - p1.canvasy); | |
1962 | } | |
12e4c741 | 1963 | } |
6a1aa64f | 1964 | } |
857a6931 | 1965 | // Stop if the point (domX, py) is above this series' upper edge |
42a9ebb8 | 1966 | if (setIdx === 0 || py < domY) { |
a937d031 KW |
1967 | closestPoint = p1; |
1968 | closestSeries = setIdx; | |
1969 | } | |
6a1aa64f | 1970 | } |
857a6931 KW |
1971 | var name = this.layout_.setNames[closestSeries]; |
1972 | return { | |
1973 | row: row, | |
1974 | seriesName: name, | |
1975 | point: closestPoint | |
1976 | }; | |
1977 | }; | |
6a1aa64f | 1978 | |
857a6931 | 1979 | /** |
6a1aa64f DV |
1980 | * When the mouse moves in the canvas, display information about a nearby data |
1981 | * point and draw dots over those points in the data series. This function | |
1982 | * takes care of cleanup of previously-drawn dots. | |
1983 | * @param {Object} event The mousemove event from the browser. | |
1984 | * @private | |
1985 | */ | |
285a6bda | 1986 | Dygraph.prototype.mouseMove_ = function(event) { |
e863a17d | 1987 | // This prevents JS errors when mousing over the canvas before data loads. |
4cac8c7a | 1988 | var points = this.layout_.points; |
a12a78ae | 1989 | if (points === undefined || points === null) return; |
e863a17d | 1990 | |
857a6931 KW |
1991 | var canvasCoords = this.eventToDomCoords(event); |
1992 | var canvasx = canvasCoords[0]; | |
1993 | var canvasy = canvasCoords[1]; | |
6a1aa64f | 1994 | |
b0963cdb | 1995 | var highlightSeriesOpts = this.getOption("highlightSeriesOpts"); |
857a6931 | 1996 | var selectionChanged = false; |
3f55b813 | 1997 | if (highlightSeriesOpts && !this.isSeriesLocked()) { |
857a6931 | 1998 | var closest; |
b0963cdb | 1999 | if (this.getBooleanOption("stackedGraph")) { |
857a6931 KW |
2000 | closest = this.findStackedPoint(canvasx, canvasy); |
2001 | } else { | |
2002 | closest = this.findClosestPoint(canvasx, canvasy); | |
43af96e7 | 2003 | } |
857a6931 | 2004 | selectionChanged = this.setSelection(closest.row, closest.seriesName); |
416b05ad | 2005 | } else { |
857a6931 KW |
2006 | var idx = this.findClosestRow(canvasx); |
2007 | selectionChanged = this.setSelection(idx); | |
12e4c741 | 2008 | } |
43af96e7 | 2009 | |
b0963cdb | 2010 | var callback = this.getFunctionOption("highlightCallback"); |
857a6931 | 2011 | if (callback && selectionChanged) { |
4ee251cb | 2012 | callback.call(this, event, |
870a309c DV |
2013 | this.lastx_, |
2014 | this.selPoints_, | |
55231c07 | 2015 | this.lastRow_, |
870a309c | 2016 | this.highlightSet_); |
12e4c741 | 2017 | } |
239c712d | 2018 | }; |
b258a3da | 2019 | |
239c712d | 2020 | /** |
55231c07 DE |
2021 | * Fetch left offset from the specified set index or if not passed, the |
2022 | * first defined boundaryIds record (see bug #236). | |
e2c21500 | 2023 | * @private |
81cb07d6 | 2024 | */ |
55231c07 | 2025 | Dygraph.prototype.getLeftBoundary_ = function(setIdx) { |
383d8473 | 2026 | if (this.boundaryIds_[setIdx]) { |
a703cbdf | 2027 | return this.boundaryIds_[setIdx][0]; |
55231c07 DE |
2028 | } else { |
2029 | for (var i = 0; i < this.boundaryIds_.length; i++) { | |
2030 | if (this.boundaryIds_[i] !== undefined) { | |
2031 | return this.boundaryIds_[i][0]; | |
2032 | } | |
81cb07d6 | 2033 | } |
55231c07 | 2034 | return 0; |
81cb07d6 | 2035 | } |
81cb07d6 KW |
2036 | }; |
2037 | ||
857a6931 KW |
2038 | Dygraph.prototype.animateSelection_ = function(direction) { |
2039 | var totalSteps = 10; | |
2040 | var millis = 30; | |
1d44ee5e KW |
2041 | if (this.fadeLevel === undefined) this.fadeLevel = 0; |
2042 | if (this.animateId === undefined) this.animateId = 0; | |
857a6931 KW |
2043 | var start = this.fadeLevel; |
2044 | var steps = direction < 0 ? start : totalSteps - start; | |
2045 | if (steps <= 0) { | |
2046 | if (this.fadeLevel) { | |
2047 | this.updateSelection_(1.0); | |
2048 | } | |
2049 | return; | |
2050 | } | |
2051 | ||
2052 | var thisId = ++this.animateId; | |
2053 | var that = this; | |
475f7420 KW |
2054 | Dygraph.repeatAndCleanup( |
2055 | function(n) { | |
2056 | // ignore simultaneous animations | |
2057 | if (that.animateId != thisId) return; | |
2058 | ||
2059 | that.fadeLevel += direction; | |
2060 | if (that.fadeLevel === 0) { | |
2061 | that.clearSelection(); | |
2062 | } else { | |
2063 | that.updateSelection_(that.fadeLevel / totalSteps); | |
2064 | } | |
2065 | }, | |
2066 | steps, millis, function() {}); | |
857a6931 KW |
2067 | }; |
2068 | ||
2ddb1197 | 2069 | /** |
239c712d NAG |
2070 | * Draw dots over the selectied points in the data series. This function |
2071 | * takes care of cleanup of previously-drawn dots. | |
2072 | * @private | |
2073 | */ | |
857a6931 | 2074 | Dygraph.prototype.updateSelection_ = function(opt_animFraction) { |
0cd1ad15 DV |
2075 | /*var defaultPrevented = */ |
2076 | this.cascadeEvents_('select', { | |
e2c21500 DV |
2077 | selectedX: this.lastx_, |
2078 | selectedPoints: this.selPoints_ | |
2079 | }); | |
2080 | // TODO(danvk): use defaultPrevented here? | |
2081 | ||
6a1aa64f | 2082 | // Clear the previously drawn vertical, if there is one |
758a629f | 2083 | var i; |
2cf95fff | 2084 | var ctx = this.canvas_ctx_; |
b0963cdb | 2085 | if (this.getOption('highlightSeriesOpts')) { |
857a6931 | 2086 | ctx.clearRect(0, 0, this.width_, this.height_); |
b0963cdb | 2087 | var alpha = 1.0 - this.getNumericOption('highlightSeriesBackgroundAlpha'); |
857a6931 | 2088 | if (alpha) { |
2a02e5dd KW |
2089 | // Activating background fade includes an animation effect for a gradual |
2090 | // fade. TODO(klausw): make this independently configurable if it causes | |
2091 | // issues? Use a shared preference to control animations? | |
2092 | var animateBackgroundFade = true; | |
2093 | if (animateBackgroundFade) { | |
857a6931 KW |
2094 | if (opt_animFraction === undefined) { |
2095 | // start a new animation | |
2096 | this.animateSelection_(1); | |
2097 | return; | |
2098 | } | |
2099 | alpha *= opt_animFraction; | |
2100 | } | |
2101 | ctx.fillStyle = 'rgba(255,255,255,' + alpha + ')'; | |
2102 | ctx.fillRect(0, 0, this.width_, this.height_); | |
2103 | } | |
38e3d209 DV |
2104 | |
2105 | // Redraw only the highlighted series in the interactive canvas (not the | |
2106 | // static plot canvas, which is where series are usually drawn). | |
2107 | this.plotter_._renderLineChart(this.highlightSet_, ctx); | |
857a6931 | 2108 | } else if (this.previousVerticalX_ >= 0) { |
46dde5f9 DV |
2109 | // Determine the maximum highlight circle size. |
2110 | var maxCircleSize = 0; | |
227b93cc | 2111 | var labels = this.attr_('labels'); |
758a629f | 2112 | for (i = 1; i < labels.length; i++) { |
b0963cdb | 2113 | var r = this.getNumericOption('highlightCircleSize', labels[i]); |
46dde5f9 DV |
2114 | if (r > maxCircleSize) maxCircleSize = r; |
2115 | } | |
6a1aa64f | 2116 | var px = this.previousVerticalX_; |
46dde5f9 DV |
2117 | ctx.clearRect(px - maxCircleSize - 1, 0, |
2118 | 2 * maxCircleSize + 2, this.height_); | |
6a1aa64f DV |
2119 | } |
2120 | ||
920208fb PF |
2121 | if (this.isUsingExcanvas_ && this.currentZoomRectArgs_) { |
2122 | Dygraph.prototype.drawZoomRect_.apply(this, this.currentZoomRectArgs_); | |
2123 | } | |
2124 | ||
d160cc3b | 2125 | if (this.selPoints_.length > 0) { |
6a1aa64f | 2126 | // Draw colored circles over the center of each selected point |
e9fe4a2f | 2127 | var canvasx = this.selPoints_[0].canvasx; |
43af96e7 | 2128 | ctx.save(); |
758a629f | 2129 | for (i = 0; i < this.selPoints_.length; i++) { |
e9fe4a2f DV |
2130 | var pt = this.selPoints_[i]; |
2131 | if (!Dygraph.isOK(pt.canvasy)) continue; | |
2132 | ||
b0963cdb DV |
2133 | var circleSize = this.getNumericOption('highlightCircleSize', pt.name); |
2134 | var callback = this.getFunctionOption("drawHighlightPointCallback", pt.name); | |
a8ef67a8 | 2135 | var color = this.plotter_.colors[pt.name]; |
78e58af4 RK |
2136 | if (!callback) { |
2137 | callback = Dygraph.Circles.DEFAULT; | |
2138 | } | |
b0963cdb | 2139 | ctx.lineWidth = this.getNumericOption('strokeWidth', pt.name); |
a8ef67a8 KW |
2140 | ctx.strokeStyle = color; |
2141 | ctx.fillStyle = color; | |
4ee251cb | 2142 | callback.call(this, this, pt.name, ctx, canvasx, pt.canvasy, |
ba697462 | 2143 | color, circleSize, pt.idx); |
6a1aa64f DV |
2144 | } |
2145 | ctx.restore(); | |
2146 | ||
2147 | this.previousVerticalX_ = canvasx; | |
2148 | } | |
2149 | }; | |
2150 | ||
2151 | /** | |
629a09ae DV |
2152 | * Manually set the selected points and display information about them in the |
2153 | * legend. The selection can be cleared using clearSelection() and queried | |
2154 | * using getSelection(). | |
1bc88216 | 2155 | * @param {number} row Row number that should be highlighted (i.e. appear with |
8cadc6c9 | 2156 | * hover dots on the chart). |
1bc88216 | 2157 | * @param {seriesName} optional series name to highlight that series with the |
857a6931 | 2158 | * the highlightSeriesOpts setting. |
b9a3ece4 KW |
2159 | * @param { locked } optional If true, keep seriesName selected when mousing |
2160 | * over the graph, disabling closest-series highlighting. Call clearSelection() | |
2161 | * to unlock it. | |
239c712d | 2162 | */ |
b9a3ece4 | 2163 | Dygraph.prototype.setSelection = function(row, opt_seriesName, opt_locked) { |
239c712d NAG |
2164 | // Extract the points we've selected |
2165 | this.selPoints_ = []; | |
50360fd0 | 2166 | |
857a6931 | 2167 | var changed = false; |
16269f6e | 2168 | if (row !== false && row >= 0) { |
857a6931 KW |
2169 | if (row != this.lastRow_) changed = true; |
2170 | this.lastRow_ = row; | |
30a5cfc6 KW |
2171 | for (var setIdx = 0; setIdx < this.layout_.points.length; ++setIdx) { |
2172 | var points = this.layout_.points[setIdx]; | |
8b7f7651 AV |
2173 | // Check if the point at the appropriate index is the point we're looking |
2174 | // for. If it is, just use it, otherwise search the array for a point | |
2175 | // in the proper place. | |
2176 | var setRow = row - this.getLeftBoundary_(setIdx); | |
2177 | if (setRow < points.length && points[setRow].idx == row) { | |
2178 | var point = points[setRow]; | |
2179 | if (point.yval !== null) this.selPoints_.push(point); | |
2180 | } else { | |
2181 | for (var pointIdx = 0; pointIdx < points.length; ++pointIdx) { | |
2182 | var point = points[pointIdx]; | |
2183 | if (point.idx == row) { | |
2184 | if (point.yval !== null) { | |
2185 | this.selPoints_.push(point); | |
2186 | } | |
2187 | break; | |
ad7785b8 | 2188 | } |
ad7785b8 | 2189 | } |
16269f6e | 2190 | } |
239c712d | 2191 | } |
857a6931 KW |
2192 | } else { |
2193 | if (this.lastRow_ >= 0) changed = true; | |
2194 | this.lastRow_ = -1; | |
16269f6e | 2195 | } |
50360fd0 | 2196 | |
16269f6e | 2197 | if (this.selPoints_.length) { |
239c712d | 2198 | this.lastx_ = this.selPoints_[0].xval; |
239c712d | 2199 | } else { |
857a6931 | 2200 | this.lastx_ = -1; |
239c712d NAG |
2201 | } |
2202 | ||
857a6931 KW |
2203 | if (opt_seriesName !== undefined) { |
2204 | if (this.highlightSet_ !== opt_seriesName) changed = true; | |
2205 | this.highlightSet_ = opt_seriesName; | |
239c712d NAG |
2206 | } |
2207 | ||
b9a3ece4 KW |
2208 | if (opt_locked !== undefined) { |
2209 | this.lockedSet_ = opt_locked; | |
2210 | } | |
2211 | ||
857a6931 KW |
2212 | if (changed) { |
2213 | this.updateSelection_(undefined); | |
2214 | } | |
2215 | return changed; | |
239c712d NAG |
2216 | }; |
2217 | ||
2218 | /** | |
6a1aa64f DV |
2219 | * The mouse has left the canvas. Clear out whatever artifacts remain |
2220 | * @param {Object} event the mouseout event from the browser. | |
2221 | * @private | |
2222 | */ | |
285a6bda | 2223 | Dygraph.prototype.mouseOut_ = function(event) { |
b0963cdb | 2224 | if (this.getFunctionOption("unhighlightCallback")) { |
4ee251cb | 2225 | this.getFunctionOption("unhighlightCallback").call(this, event); |
a4c6a67c AV |
2226 | } |
2227 | ||
4ee251cb | 2228 | if (this.getBooleanOption("hideOverlayOnMouseOut") && !this.lockedSet_) { |
239c712d | 2229 | this.clearSelection(); |
43af96e7 | 2230 | } |
6a1aa64f DV |
2231 | }; |
2232 | ||
239c712d | 2233 | /** |
629a09ae DV |
2234 | * Clears the current selection (i.e. points that were highlighted by moving |
2235 | * the mouse over the chart). | |
239c712d NAG |
2236 | */ |
2237 | Dygraph.prototype.clearSelection = function() { | |
e2c21500 DV |
2238 | this.cascadeEvents_('deselect', {}); |
2239 | ||
b9a3ece4 | 2240 | this.lockedSet_ = false; |
239c712d | 2241 | // Get rid of the overlay data |
857a6931 KW |
2242 | if (this.fadeLevel) { |
2243 | this.animateSelection_(-1); | |
2244 | return; | |
2245 | } | |
2cf95fff | 2246 | this.canvas_ctx_.clearRect(0, 0, this.width_, this.height_); |
857a6931 | 2247 | this.fadeLevel = 0; |
239c712d NAG |
2248 | this.selPoints_ = []; |
2249 | this.lastx_ = -1; | |
857a6931 KW |
2250 | this.lastRow_ = -1; |
2251 | this.highlightSet_ = null; | |
758a629f | 2252 | }; |
239c712d | 2253 | |
103b7292 | 2254 | /** |
629a09ae DV |
2255 | * Returns the number of the currently selected row. To get data for this row, |
2256 | * you can use the getValue method. | |
1bc88216 | 2257 | * @return {number} row number, or -1 if nothing is selected |
103b7292 NAG |
2258 | */ |
2259 | Dygraph.prototype.getSelection = function() { | |
2260 | if (!this.selPoints_ || this.selPoints_.length < 1) { | |
2261 | return -1; | |
2262 | } | |
50360fd0 | 2263 | |
a12a78ae DV |
2264 | for (var setIdx = 0; setIdx < this.layout_.points.length; setIdx++) { |
2265 | var points = this.layout_.points[setIdx]; | |
2266 | for (var row = 0; row < points.length; row++) { | |
2267 | if (points[row].x == this.selPoints_[0].x) { | |
55231c07 | 2268 | return points[row].idx; |
a12a78ae | 2269 | } |
103b7292 NAG |
2270 | } |
2271 | } | |
2272 | return -1; | |
2e1fcf1a | 2273 | }; |
103b7292 | 2274 | |
e2c21500 DV |
2275 | /** |
2276 | * Returns the name of the currently-highlighted series. | |
2277 | * Only available when the highlightSeriesOpts option is in use. | |
2278 | */ | |
857a6931 KW |
2279 | Dygraph.prototype.getHighlightSeries = function() { |
2280 | return this.highlightSet_; | |
2281 | }; | |
2282 | ||
19589a3e | 2283 | /** |
3f55b813 KW |
2284 | * Returns true if the currently-highlighted series was locked |
2285 | * via setSelection(..., seriesName, true). | |
2286 | */ | |
2287 | Dygraph.prototype.isSeriesLocked = function() { | |
2288 | return this.lockedSet_; | |
2289 | }; | |
2290 | ||
2291 | /** | |
6a1aa64f | 2292 | * Fires when there's data available to be graphed. |
1bc88216 | 2293 | * @param {string} data Raw CSV data to be plotted |
6a1aa64f DV |
2294 | * @private |
2295 | */ | |
285a6bda | 2296 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f | 2297 | this.rawData_ = this.parseCSV_(data); |
6f5f0b2b | 2298 | this.cascadeDataDidUpdateEvent_(); |
26ca7938 | 2299 | this.predraw_(); |
6a1aa64f DV |
2300 | }; |
2301 | ||
6a1aa64f DV |
2302 | /** |
2303 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
2304 | * @private | |
2305 | */ | |
285a6bda | 2306 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f | 2307 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
7201b11e | 2308 | var range; |
6a1aa64f | 2309 | if (this.dateWindow_) { |
7201b11e | 2310 | range = [this.dateWindow_[0], this.dateWindow_[1]]; |
6a1aa64f | 2311 | } else { |
ccecde93 | 2312 | range = this.xAxisExtremes(); |
7201b11e JB |
2313 | } |
2314 | ||
48e614ac DV |
2315 | var xAxisOptionsView = this.optionsViewForAxis_('x'); |
2316 | var xTicks = xAxisOptionsView('ticker')( | |
2317 | range[0], | |
2318 | range[1], | |
b504bdd2 | 2319 | this.plotter_.area.w, // TODO(danvk): should be area.width |
48e614ac DV |
2320 | xAxisOptionsView, |
2321 | this); | |
2322 | // var msg = 'ticker(' + range[0] + ', ' + range[1] + ', ' + this.width_ + ', ' + this.attr_('pixelsPerXLabel') + ') -> ' + JSON.stringify(xTicks); | |
2323 | // console.log(msg); | |
b2c9222a | 2324 | this.layout_.setXTicks(xTicks); |
32988383 DV |
2325 | }; |
2326 | ||
629a09ae | 2327 | /** |
3ea41d86 | 2328 | * Returns the correct handler class for the currently set options. |
629a09ae | 2329 | * @private |
3ea41d86 DV |
2330 | */ |
2331 | Dygraph.prototype.getHandlerClass_ = function() { | |
2332 | var handlerClass; | |
2333 | if (this.attr_('dataHandler')) { | |
2334 | handlerClass = this.attr_('dataHandler'); | |
2335 | } else if (this.fractions_) { | |
b0963cdb | 2336 | if (this.getBooleanOption('errorBars')) { |
3ea41d86 | 2337 | handlerClass = Dygraph.DataHandlers.FractionsBarsHandler; |
a49c164a | 2338 | } else { |
3ea41d86 | 2339 | handlerClass = Dygraph.DataHandlers.DefaultFractionHandler; |
5011e7a1 | 2340 | } |
b0963cdb | 2341 | } else if (this.getBooleanOption('customBars')) { |
3ea41d86 | 2342 | handlerClass = Dygraph.DataHandlers.CustomBarsHandler; |
b0963cdb | 2343 | } else if (this.getBooleanOption('errorBars')) { |
3ea41d86 | 2344 | handlerClass = Dygraph.DataHandlers.ErrorBarsHandler; |
5011e7a1 | 2345 | } else { |
3ea41d86 | 2346 | handlerClass = Dygraph.DataHandlers.DefaultHandler; |
5011e7a1 | 2347 | } |
3ea41d86 | 2348 | return handlerClass; |
5011e7a1 DV |
2349 | }; |
2350 | ||
6a1aa64f | 2351 | /** |
629a09ae | 2352 | * @private |
26ca7938 DV |
2353 | * This function is called once when the chart's data is changed or the options |
2354 | * dictionary is updated. It is _not_ called when the user pans or zooms. The | |
2355 | * idea is that values derived from the chart's data can be computed here, | |
2356 | * rather than every time the chart is drawn. This includes things like the | |
2357 | * number of axes, rolling averages, etc. | |
2358 | */ | |
2359 | Dygraph.prototype.predraw_ = function() { | |
7153e001 | 2360 | var start = new Date(); |
a49c164a DE |
2361 | |
2362 | // Create the correct dataHandler | |
3ea41d86 | 2363 | this.dataHandler_ = new (this.getHandlerClass_())(); |
7153e001 | 2364 | |
0d216a60 PF |
2365 | this.layout_.computePlotArea(); |
2366 | ||
26ca7938 DV |
2367 | // TODO(danvk): move more computations out of drawGraph_ and into here. |
2368 | this.computeYAxes_(); | |
2369 | ||
383d8473 | 2370 | if (!this.is_initial_draw_) { |
aeca29ac RK |
2371 | this.canvas_ctx_.restore(); |
2372 | this.hidden_ctx_.restore(); | |
2373 | } | |
2374 | ||
2375 | this.canvas_ctx_.save(); | |
2376 | this.hidden_ctx_.save(); | |
2377 | ||
c04c8044 | 2378 | // Create a new plotter. |
26ca7938 | 2379 | this.plotter_ = new DygraphCanvasRenderer(this, |
2cf95fff RK |
2380 | this.hidden_, |
2381 | this.hidden_ctx_, | |
0e23cfc6 | 2382 | this.layout_); |
26ca7938 | 2383 | |
0abfbd7e DV |
2384 | // The roller sits in the bottom left corner of the chart. We don't know where |
2385 | // this will be until the options are available, so it's positioned here. | |
8c69de65 | 2386 | this.createRollInterface_(); |
26ca7938 | 2387 | |
e2c21500 | 2388 | this.cascadeEvents_('predraw'); |
0abfbd7e | 2389 | |
b1a3b195 DV |
2390 | // Convert the raw data (a 2D array) into the internal format and compute |
2391 | // rolling averages. | |
2392 | this.rolledSeries_ = [null]; // x-axis is the first series and it's special | |
395e98a3 | 2393 | for (var i = 1; i < this.numColumns(); i++) { |
c1780ad0 | 2394 | // var logScale = this.attr_('logscale', i); // TODO(klausw): this looks wrong // konigsberg thinks so too. |
a49c164a DE |
2395 | var series = this.dataHandler_.extractSeries(this.rawData_, i, this.attributes_); |
2396 | if (this.rollPeriod_ > 1) { | |
2397 | series = this.dataHandler_.rollingAverage(series, this.rollPeriod_, this.attributes_); | |
2398 | } | |
2399 | ||
b1a3b195 DV |
2400 | this.rolledSeries_.push(series); |
2401 | } | |
2402 | ||
26ca7938 DV |
2403 | // If the data or options have changed, then we'd better redraw. |
2404 | this.drawGraph_(); | |
4b4d1a63 DV |
2405 | |
2406 | // This is used to determine whether to do various animations. | |
2407 | var end = new Date(); | |
2408 | this.drawingTimeMs_ = (end - start); | |
26ca7938 DV |
2409 | }; |
2410 | ||
2411 | /** | |
30a5cfc6 KW |
2412 | * Point structure. |
2413 | * | |
2414 | * xval_* and yval_* are the original unscaled data values, | |
2415 | * while x_* and y_* are scaled to the range (0.0-1.0) for plotting. | |
2416 | * yval_stacked is the cumulative Y value used for stacking graphs, | |
2417 | * and bottom/top/minus/plus are used for error bar graphs. | |
2418 | * | |
2419 | * @typedef {{ | |
2420 | * idx: number, | |
2421 | * name: string, | |
2422 | * x: ?number, | |
2423 | * xval: ?number, | |
2424 | * y_bottom: ?number, | |
2425 | * y: ?number, | |
2426 | * y_stacked: ?number, | |
2427 | * y_top: ?number, | |
2428 | * yval_minus: ?number, | |
2429 | * yval: ?number, | |
2430 | * yval_plus: ?number, | |
2431 | * yval_stacked | |
2432 | * }} | |
2433 | */ | |
bcc53a77 | 2434 | Dygraph.PointType = undefined; |
30a5cfc6 | 2435 | |
30a5cfc6 KW |
2436 | /** |
2437 | * Calculates point stacking for stackedGraph=true. | |
2438 | * | |
2439 | * For stacking purposes, interpolate or extend neighboring data across | |
2440 | * NaN values based on stackedGraphNaNFill settings. This is for display | |
2441 | * only, the underlying data value as shown in the legend remains NaN. | |
2442 | * | |
2443 | * @param {Array.<Dygraph.PointType>} points Point array for a single series. | |
2444 | * Updates each Point's yval_stacked property. | |
2445 | * @param {Array.<number>} cumulativeYval Accumulated top-of-graph stacked Y | |
2446 | * values for the series seen so far. Index is the row number. Updated | |
2447 | * based on the current series's values. | |
2448 | * @param {Array.<number>} seriesExtremes Min and max values, updated | |
2449 | * to reflect the stacked values. | |
2450 | * @param {string} fillMethod Interpolation method, one of 'all', 'inside', or | |
2451 | * 'none'. | |
24f2a74f | 2452 | * @private |
30a5cfc6 KW |
2453 | */ |
2454 | Dygraph.stackPoints_ = function( | |
2455 | points, cumulativeYval, seriesExtremes, fillMethod) { | |
2456 | var lastXval = null; | |
2457 | var prevPoint = null; | |
2458 | var nextPoint = null; | |
2459 | var nextPointIdx = -1; | |
2460 | ||
2461 | // Find the next stackable point starting from the given index. | |
bcc53a77 | 2462 | var updateNextPoint = function(idx) { |
30a5cfc6 KW |
2463 | // If we've previously found a non-NaN point and haven't gone past it yet, |
2464 | // just use that. | |
2465 | if (nextPointIdx >= idx) return; | |
2466 | ||
2467 | // We haven't found a non-NaN point yet or have moved past it, | |
2468 | // look towards the right to find a non-NaN point. | |
2469 | for (var j = idx; j < points.length; ++j) { | |
2470 | // Clear out a previously-found point (if any) since it's no longer | |
2471 | // valid, we shouldn't use it for interpolation anymore. | |
2472 | nextPoint = null; | |
2473 | if (!isNaN(points[j].yval) && points[j].yval !== null) { | |
2474 | nextPointIdx = j; | |
2475 | nextPoint = points[j]; | |
2476 | break; | |
2477 | } | |
2478 | } | |
2479 | }; | |
2480 | ||
2481 | for (var i = 0; i < points.length; ++i) { | |
2482 | var point = points[i]; | |
2483 | var xval = point.xval; | |
2484 | if (cumulativeYval[xval] === undefined) { | |
2485 | cumulativeYval[xval] = 0; | |
2486 | } | |
2487 | ||
2488 | var actualYval = point.yval; | |
2489 | if (isNaN(actualYval) || actualYval === null) { | |
06c0e1ee | 2490 | if(fillMethod == 'none') { |
30a5cfc6 | 2491 | actualYval = 0; |
d68137fd | 2492 | } else { |
06c0e1ee S |
2493 | // Interpolate/extend for stacking purposes if possible. |
2494 | updateNextPoint(i); | |
2495 | if (prevPoint && nextPoint && fillMethod != 'none') { | |
2496 | // Use linear interpolation between prevPoint and nextPoint. | |
2497 | actualYval = prevPoint.yval + (nextPoint.yval - prevPoint.yval) * | |
2498 | ((xval - prevPoint.xval) / (nextPoint.xval - prevPoint.xval)); | |
2499 | } else if (prevPoint && fillMethod == 'all') { | |
2500 | actualYval = prevPoint.yval; | |
2501 | } else if (nextPoint && fillMethod == 'all') { | |
2502 | actualYval = nextPoint.yval; | |
2503 | } else { | |
2504 | actualYval = 0; | |
2505 | } | |
30a5cfc6 KW |
2506 | } |
2507 | } else { | |
2508 | prevPoint = point; | |
2509 | } | |
2510 | ||
2511 | var stackedYval = cumulativeYval[xval]; | |
2512 | if (lastXval != xval) { | |
2513 | // If an x-value is repeated, we ignore the duplicates. | |
2514 | stackedYval += actualYval; | |
2515 | cumulativeYval[xval] = stackedYval; | |
2516 | } | |
2517 | lastXval = xval; | |
2518 | ||
2519 | point.yval_stacked = stackedYval; | |
2520 | ||
2521 | if (stackedYval > seriesExtremes[1]) { | |
2522 | seriesExtremes[1] = stackedYval; | |
2523 | } | |
2524 | if (stackedYval < seriesExtremes[0]) { | |
2525 | seriesExtremes[0] = stackedYval; | |
2526 | } | |
2527 | } | |
2528 | }; | |
2529 | ||
2530 | ||
2531 | /** | |
b1a3b195 DV |
2532 | * Loop over all fields and create datasets, calculating extreme y-values for |
2533 | * each series and extreme x-indices as we go. | |
fc4e84fa | 2534 | * |
b1a3b195 DV |
2535 | * dateWindow is passed in as an explicit parameter so that we can compute |
2536 | * extreme values "speculatively", i.e. without actually setting state on the | |
2537 | * dygraph. | |
fc4e84fa | 2538 | * |
30a5cfc6 KW |
2539 | * @param {Array.<Array.<Array.<(number|Array<number>)>>} rolledSeries, where |
2540 | * rolledSeries[seriesIndex][row] = raw point, where | |
2541 | * seriesIndex is the column number starting with 1, and | |
2542 | * rawPoint is [x,y] or [x, [y, err]] or [x, [y, yminus, yplus]]. | |
2543 | * @param {?Array.<number>} dateWindow [xmin, xmax] pair, or null. | |
2544 | * @return {{ | |
2545 | * points: Array.<Array.<Dygraph.PointType>>, | |
2546 | * seriesExtremes: Array.<Array.<number>>, | |
2547 | * boundaryIds: Array.<number>}} | |
6a1aa64f DV |
2548 | * @private |
2549 | */ | |
b1a3b195 DV |
2550 | Dygraph.prototype.gatherDatasets_ = function(rolledSeries, dateWindow) { |
2551 | var boundaryIds = []; | |
30a5cfc6 KW |
2552 | var points = []; |
2553 | var cumulativeYval = []; // For stacked series. | |
f09fc545 | 2554 | var extremes = {}; // series name -> [low, high] |
a49c164a DE |
2555 | var seriesIdx, sampleIdx; |
2556 | var firstIdx, lastIdx; | |
8b5f1691 | 2557 | var axisIdx; |
a49c164a | 2558 | |
b1a3b195 DV |
2559 | // Loop over the fields (series). Go from the last to the first, |
2560 | // because if they're stacked that's how we accumulate the values. | |
2561 | var num_series = rolledSeries.length - 1; | |
bcc53a77 | 2562 | var series; |
a49c164a DE |
2563 | for (seriesIdx = num_series; seriesIdx >= 1; seriesIdx--) { |
2564 | if (!this.visibility()[seriesIdx - 1]) continue; | |
1cf11047 | 2565 | |
6a1aa64f | 2566 | // Prune down to the desired range, if necessary (for zooming) |
1a26f3fb DV |
2567 | // Because there can be lines going to points outside of the visible area, |
2568 | // we actually prune to visible points, plus one on either side. | |
b1a3b195 | 2569 | if (dateWindow) { |
a49c164a | 2570 | series = rolledSeries[seriesIdx]; |
b1a3b195 DV |
2571 | var low = dateWindow[0]; |
2572 | var high = dateWindow[1]; | |
4e59e63e | 2573 | |
1a26f3fb DV |
2574 | // TODO(danvk): do binary search instead of linear search. |
2575 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. | |
a49c164a DE |
2576 | firstIdx = null; |
2577 | lastIdx = null; | |
2578 | for (sampleIdx = 0; sampleIdx < series.length; sampleIdx++) { | |
2579 | if (series[sampleIdx][0] >= low && firstIdx === null) { | |
2580 | firstIdx = sampleIdx; | |
1a26f3fb | 2581 | } |
a49c164a DE |
2582 | if (series[sampleIdx][0] <= high) { |
2583 | lastIdx = sampleIdx; | |
6a1aa64f DV |
2584 | } |
2585 | } | |
4e59e63e | 2586 | |
1a26f3fb | 2587 | if (firstIdx === null) firstIdx = 0; |
14ac984e | 2588 | var correctedFirstIdx = firstIdx; |
b0375a28 | 2589 | var isInvalidValue = true; |
4e59e63e | 2590 | while (isInvalidValue && correctedFirstIdx > 0) { |
14ac984e | 2591 | correctedFirstIdx--; |
a49c164a DE |
2592 | // check if the y value is null. |
2593 | isInvalidValue = series[correctedFirstIdx][1] === null; | |
14ac984e | 2594 | } |
4e59e63e | 2595 | |
1a26f3fb | 2596 | if (lastIdx === null) lastIdx = series.length - 1; |
14ac984e | 2597 | var correctedLastIdx = lastIdx; |
b0375a28 | 2598 | isInvalidValue = true; |
4e59e63e | 2599 | while (isInvalidValue && correctedLastIdx < series.length - 1) { |
14ac984e | 2600 | correctedLastIdx++; |
a49c164a | 2601 | isInvalidValue = series[correctedLastIdx][1] === null; |
14ac984e | 2602 | } |
4e59e63e | 2603 | |
4e59e63e | 2604 | if (correctedFirstIdx!==firstIdx) { |
30a5cfc6 | 2605 | firstIdx = correctedFirstIdx; |
6a1aa64f | 2606 | } |
4e59e63e | 2607 | if (correctedLastIdx !== lastIdx) { |
30a5cfc6 | 2608 | lastIdx = correctedLastIdx; |
4e59e63e | 2609 | } |
55231c07 | 2610 | |
a49c164a | 2611 | boundaryIds[seriesIdx-1] = [firstIdx, lastIdx]; |
55231c07 | 2612 | |
30a5cfc6 KW |
2613 | // .slice's end is exclusive, we want to include lastIdx. |
2614 | series = series.slice(firstIdx, lastIdx + 1); | |
16269f6e | 2615 | } else { |
a49c164a DE |
2616 | series = rolledSeries[seriesIdx]; |
2617 | boundaryIds[seriesIdx-1] = [0, series.length-1]; | |
6a1aa64f DV |
2618 | } |
2619 | ||
a49c164a DE |
2620 | var seriesName = this.attr_("labels")[seriesIdx]; |
2621 | var seriesExtremes = this.dataHandler_.getExtremeYValues(series, | |
b0963cdb | 2622 | dateWindow, this.getBooleanOption("stepPlot",seriesName)); |
5011e7a1 | 2623 | |
a49c164a DE |
2624 | var seriesPoints = this.dataHandler_.seriesToPoints(series, |
2625 | seriesName, boundaryIds[seriesIdx-1][0]); | |
43af96e7 | 2626 | |
b0963cdb | 2627 | if (this.getBooleanOption("stackedGraph")) { |
8b5f1691 JJS |
2628 | axisIdx = this.attributes_.axisForSeries(seriesName); |
2629 | if (cumulativeYval[axisIdx] === undefined) { | |
2630 | cumulativeYval[axisIdx] = []; | |
2631 | } | |
2632 | Dygraph.stackPoints_(seriesPoints, cumulativeYval[axisIdx], seriesExtremes, | |
b0963cdb | 2633 | this.getBooleanOption("stackedGraphNaNFill")); |
6a1aa64f | 2634 | } |
354e15ab | 2635 | |
b1a3b195 | 2636 | extremes[seriesName] = seriesExtremes; |
a49c164a | 2637 | points[seriesIdx] = seriesPoints; |
7d463f49 KW |
2638 | } |
2639 | ||
30a5cfc6 | 2640 | return { points: points, extremes: extremes, boundaryIds: boundaryIds }; |
b1a3b195 DV |
2641 | }; |
2642 | ||
2643 | /** | |
2644 | * Update the graph with new data. This method is called when the viewing area | |
2645 | * has changed. If the underlying data or options have changed, predraw_ will | |
2646 | * be called before drawGraph_ is called. | |
2647 | * | |
b1a3b195 DV |
2648 | * @private |
2649 | */ | |
e2c21500 | 2650 | Dygraph.prototype.drawGraph_ = function() { |
b1a3b195 DV |
2651 | var start = new Date(); |
2652 | ||
b1a3b195 DV |
2653 | // This is used to set the second parameter to drawCallback, below. |
2654 | var is_initial_draw = this.is_initial_draw_; | |
2655 | this.is_initial_draw_ = false; | |
2656 | ||
b1a3b195 DV |
2657 | this.layout_.removeAllDatasets(); |
2658 | this.setColors_(); | |
b0963cdb | 2659 | this.attrs_.pointSize = 0.5 * this.getNumericOption('highlightCircleSize'); |
b1a3b195 DV |
2660 | |
2661 | var packed = this.gatherDatasets_(this.rolledSeries_, this.dateWindow_); | |
30a5cfc6 KW |
2662 | var points = packed.points; |
2663 | var extremes = packed.extremes; | |
2664 | this.boundaryIds_ = packed.boundaryIds; | |
b1a3b195 | 2665 | |
82c6fe4d KW |
2666 | this.setIndexByName_ = {}; |
2667 | var labels = this.attr_("labels"); | |
2668 | if (labels.length > 0) { | |
2669 | this.setIndexByName_[labels[0]] = 0; | |
2670 | } | |
857a6931 | 2671 | var dataIdx = 0; |
30a5cfc6 | 2672 | for (var i = 1; i < points.length; i++) { |
82c6fe4d | 2673 | this.setIndexByName_[labels[i]] = i; |
4523c1f6 | 2674 | if (!this.visibility()[i - 1]) continue; |
30a5cfc6 | 2675 | this.layout_.addDataset(labels[i], points[i]); |
857a6931 | 2676 | this.datasetIndex_[i] = dataIdx++; |
43af96e7 NK |
2677 | } |
2678 | ||
6faebb69 | 2679 | this.computeYAxisRanges_(extremes); |
b2c9222a DV |
2680 | this.layout_.setYAxes(this.axes_); |
2681 | ||
6a1aa64f DV |
2682 | this.addXTicks_(); |
2683 | ||
b2c9222a | 2684 | // Save the X axis zoomed status as the updateOptions call will tend to set it erroneously |
81856f70 | 2685 | var tmp_zoomed_x = this.zoomed_x_; |
6a1aa64f | 2686 | // Tell PlotKit to use this new data and render itself |
81856f70 | 2687 | this.zoomed_x_ = tmp_zoomed_x; |
30a5cfc6 | 2688 | this.layout_.evaluate(); |
e2c21500 | 2689 | this.renderGraph_(is_initial_draw); |
9ca829f2 | 2690 | |
b0963cdb | 2691 | if (this.getStringOption("timingName")) { |
9ca829f2 | 2692 | var end = new Date(); |
8a68db7d | 2693 | console.log(this.getStringOption("timingName") + " - drawGraph: " + (end - start) + "ms"); |
9ca829f2 DV |
2694 | } |
2695 | }; | |
2696 | ||
e2c21500 DV |
2697 | /** |
2698 | * This does the work of drawing the chart. It assumes that the layout and axis | |
2699 | * scales have already been set (e.g. by predraw_). | |
2700 | * | |
2701 | * @private | |
2702 | */ | |
2703 | Dygraph.prototype.renderGraph_ = function(is_initial_draw) { | |
1748a51c | 2704 | this.cascadeEvents_('clearChart'); |
6a1aa64f | 2705 | this.plotter_.clear(); |
f417e3d3 | 2706 | |
b0963cdb | 2707 | if (this.getFunctionOption('underlayCallback')) { |
98eb4713 DV |
2708 | // NOTE: we pass the dygraph object to this callback twice to avoid breaking |
2709 | // users who expect a deprecated form of this callback. | |
4ee251cb | 2710 | this.getFunctionOption('underlayCallback').call(this, |
98eb4713 DV |
2711 | this.hidden_ctx_, this.layout_.getPlotArea(), this, this); |
2712 | } | |
2713 | ||
2714 | var e = { | |
189f8030 | 2715 | canvas: this.hidden_, |
2de7166c | 2716 | drawingContext: this.hidden_ctx_ |
98eb4713 DV |
2717 | }; |
2718 | this.cascadeEvents_('willDrawChart', e); | |
6a1aa64f | 2719 | this.plotter_.render(); |
98eb4713 | 2720 | this.cascadeEvents_('didDrawChart', e); |
fa11f4e4 | 2721 | this.lastRow_ = -1; // because plugins/legend.js clears the legend |
8cfe592f DV |
2722 | |
2723 | // TODO(danvk): is this a performance bottleneck when panning? | |
2724 | // The interaction canvas should already be empty in that situation. | |
7c39bb3a | 2725 | this.canvas_.getContext('2d').clearRect(0, 0, this.width_, this.height_); |
599fb4ad | 2726 | |
b0963cdb DV |
2727 | if (this.getFunctionOption("drawCallback") !== null) { |
2728 | this.getFunctionOption("drawCallback")(this, is_initial_draw); | |
599fb4ad | 2729 | } |
5bcc58b4 DV |
2730 | if (is_initial_draw) { |
2731 | this.readyFired_ = true; | |
2732 | while (this.readyFns_.length > 0) { | |
2733 | var fn = this.readyFns_.pop(); | |
2734 | fn(this); | |
2735 | } | |
2736 | } | |
6a1aa64f DV |
2737 | }; |
2738 | ||
2739 | /** | |
629a09ae | 2740 | * @private |
26ca7938 DV |
2741 | * Determine properties of the y-axes which are independent of the data |
2742 | * currently being displayed. This includes things like the number of axes and | |
2743 | * the style of the axes. It does not include the range of each axis and its | |
2744 | * tick marks. | |
16f00742 | 2745 | * This fills in this.axes_. |
26ca7938 | 2746 | * axes_ = [ { options } ] |
26ca7938 | 2747 | * indices are into the axes_ array. |
f09fc545 | 2748 | */ |
26ca7938 | 2749 | Dygraph.prototype.computeYAxes_ = function() { |
d64b8fea RK |
2750 | // Preserve valueWindow settings if they exist, and if the user hasn't |
2751 | // specified a new valueRange. | |
0cd1ad15 | 2752 | var valueWindows, axis, index, opts, v; |
758a629f | 2753 | if (this.axes_ !== undefined && this.user_attrs_.hasOwnProperty("valueRange") === false) { |
d64b8fea | 2754 | valueWindows = []; |
758a629f | 2755 | for (index = 0; index < this.axes_.length; index++) { |
d64b8fea RK |
2756 | valueWindows.push(this.axes_[index].valueWindow); |
2757 | } | |
2758 | } | |
2759 | ||
6ad8b6a4 RK |
2760 | // this.axes_ doesn't match this.attributes_.axes_.options. It's used for |
2761 | // data computation as well as options storage. | |
f09fc545 | 2762 | // Go through once and add all the axes. |
02c93ff5 | 2763 | this.axes_ = []; |
0d216a60 | 2764 | |
02c93ff5 | 2765 | for (axis = 0; axis < this.attributes_.numAxes(); axis++) { |
6ad8b6a4 | 2766 | // Add a new axis, making a copy of its per-axis options. |
02c93ff5 | 2767 | opts = { g : this }; |
6ad8b6a4 RK |
2768 | Dygraph.update(opts, this.attributes_.axisOptions(axis)); |
2769 | this.axes_[axis] = opts; | |
f09fc545 | 2770 | } |
1c77a3a1 | 2771 | |
7740dd00 RK |
2772 | |
2773 | // Copy global valueRange option over to the first axis. | |
2774 | // NOTE(konigsberg): Are these two statements necessary? | |
2775 | // I tried removing it. The automated tests pass, and manually | |
2776 | // messing with tests/zoom.html showed no trouble. | |
2777 | v = this.attr_('valueRange'); | |
2778 | if (v) this.axes_[0].valueRange = v; | |
478b866b | 2779 | |
758a629f | 2780 | if (valueWindows !== undefined) { |
d64b8fea | 2781 | // Restore valueWindow settings. |
4ecb55b5 RK |
2782 | |
2783 | // When going from two axes back to one, we only restore | |
2784 | // one axis. | |
2785 | var idxCount = Math.min(valueWindows.length, this.axes_.length); | |
2786 | ||
2787 | for (index = 0; index < idxCount; index++) { | |
d64b8fea RK |
2788 | this.axes_[index].valueWindow = valueWindows[index]; |
2789 | } | |
2790 | } | |
4dd0ac55 | 2791 | |
4dd0ac55 RV |
2792 | for (axis = 0; axis < this.axes_.length; axis++) { |
2793 | if (axis === 0) { | |
2794 | opts = this.optionsViewForAxis_('y' + (axis ? '2' : '')); | |
2795 | v = opts("valueRange"); | |
2796 | if (v) this.axes_[axis].valueRange = v; | |
2797 | } else { // To keep old behavior | |
2798 | var axes = this.user_attrs_.axes; | |
2799 | if (axes && axes.y2) { | |
2800 | v = axes.y2.valueRange; | |
2801 | if (v) this.axes_[axis].valueRange = v; | |
2802 | } | |
2803 | } | |
2804 | } | |
26ca7938 DV |
2805 | }; |
2806 | ||
2807 | /** | |
2808 | * Returns the number of y-axes on the chart. | |
1bc88216 | 2809 | * @return {number} the number of axes. |
26ca7938 DV |
2810 | */ |
2811 | Dygraph.prototype.numAxes = function() { | |
16f00742 | 2812 | return this.attributes_.numAxes(); |
26ca7938 DV |
2813 | }; |
2814 | ||
2815 | /** | |
629a09ae | 2816 | * @private |
b2c9222a | 2817 | * Returns axis properties for the given series. |
1bc88216 | 2818 | * @param {string} setName The name of the series for which to get axis |
b2c9222a | 2819 | * properties, e.g. 'Y1'. |
1bc88216 | 2820 | * @return {Object} The axis properties. |
b2c9222a DV |
2821 | */ |
2822 | Dygraph.prototype.axisPropertiesForSeries = function(series) { | |
2823 | // TODO(danvk): handle errors. | |
16f00742 | 2824 | return this.axes_[this.attributes_.axisForSeries(series)]; |
b2c9222a DV |
2825 | }; |
2826 | ||
2827 | /** | |
2828 | * @private | |
26ca7938 DV |
2829 | * Determine the value range and tick marks for each axis. |
2830 | * @param {Object} extremes A mapping from seriesName -> [low, high] | |
2831 | * This fills in the valueRange and ticks fields in each entry of this.axes_. | |
2832 | */ | |
2833 | Dygraph.prototype.computeYAxisRanges_ = function(extremes) { | |
9adc2c33 | 2834 | var isNullUndefinedOrNaN = function(num) { |
126bf1e3 | 2835 | return isNaN(parseFloat(num)); |
6b05851c | 2836 | }; |
16f00742 | 2837 | var numAxes = this.attributes_.numAxes(); |
4bac38d8 | 2838 | var ypadCompat, span, series, ypad; |
9e906ae6 DE |
2839 | |
2840 | var p_axis; | |
f09fc545 DV |
2841 | |
2842 | // Compute extreme values, a span and tick marks for each axis. | |
16f00742 | 2843 | for (var i = 0; i < numAxes; i++) { |
26ca7938 | 2844 | var axis = this.axes_[i]; |
ec40f67c RK |
2845 | var logscale = this.attributes_.getForAxis("logscale", i); |
2846 | var includeZero = this.attributes_.getForAxis("includeZero", i); | |
9e906ae6 | 2847 | var independentTicks = this.attributes_.getForAxis("independentTicks", i); |
6ad8b6a4 RK |
2848 | series = this.attributes_.seriesForAxis(i); |
2849 | ||
31a8d0cd | 2850 | // Add some padding. This supports two Y padding operation modes: |
2851 | // | |
2852 | // - backwards compatible (yRangePad not set): | |
2853 | // 10% padding for automatic Y ranges, but not for user-supplied | |
2854 | // ranges, and move a close-to-zero edge to zero except if | |
2855 | // avoidMinZero is set, since drawing at the edge results in | |
2856 | // invisible lines. Unfortunately lines drawn at the edge of a | |
2857 | // user-supplied range will still be invisible. If logscale is | |
2858 | // set, add a variable amount of padding at the top but | |
2859 | // none at the bottom. | |
2860 | // | |
2861 | // - new-style (yRangePad set by the user): | |
2862 | // always add the specified Y padding. | |
2863 | // | |
2864 | ypadCompat = true; | |
2865 | ypad = 0.1; // add 10% | |
b0963cdb | 2866 | if (this.getNumericOption('yRangePad') !== null) { |
31a8d0cd | 2867 | ypadCompat = false; |
2868 | // Convert pixel padding to ratio | |
b0963cdb | 2869 | ypad = this.getNumericOption('yRangePad') / this.plotter_.area.h; |
31a8d0cd | 2870 | } |
2871 | ||
83b0c192 | 2872 | if (series.length === 0) { |
06fc69b6 AV |
2873 | // If no series are defined or visible then use a reasonable default |
2874 | axis.extremeRange = [0, 1]; | |
2875 | } else { | |
1c77a3a1 | 2876 | // Calculate the extremes of extremes. |
f09fc545 DV |
2877 | var minY = Infinity; // extremes[series[0]][0]; |
2878 | var maxY = -Infinity; // extremes[series[0]][1]; | |
ba049b89 | 2879 | var extremeMinY, extremeMaxY; |
a2da3777 | 2880 | |
f09fc545 | 2881 | for (var j = 0; j < series.length; j++) { |
a2da3777 DV |
2882 | // this skips invisible series |
2883 | if (!extremes.hasOwnProperty(series[j])) continue; | |
2884 | ||
ba049b89 NN |
2885 | // Only use valid extremes to stop null data series' from corrupting the scale. |
2886 | extremeMinY = extremes[series[j]][0]; | |
758a629f | 2887 | if (extremeMinY !== null) { |
36dfa958 | 2888 | minY = Math.min(extremeMinY, minY); |
ba049b89 NN |
2889 | } |
2890 | extremeMaxY = extremes[series[j]][1]; | |
758a629f | 2891 | if (extremeMaxY !== null) { |
36dfa958 | 2892 | maxY = Math.max(extremeMaxY, maxY); |
ba049b89 | 2893 | } |
f09fc545 | 2894 | } |
fa460473 KW |
2895 | |
2896 | // Include zero if requested by the user. | |
2897 | if (includeZero && !logscale) { | |
2898 | if (minY > 0) minY = 0; | |
2899 | if (maxY < 0) maxY = 0; | |
2900 | } | |
f09fc545 | 2901 | |
a2da3777 | 2902 | // Ensure we have a valid scale, otherwise default to [0, 1] for safety. |
36dfa958 | 2903 | if (minY == Infinity) minY = 0; |
a2da3777 | 2904 | if (maxY == -Infinity) maxY = 1; |
ba049b89 | 2905 | |
4bac38d8 | 2906 | span = maxY - minY; |
fa460473 KW |
2907 | // special case: if we have no sense of scale, center on the sole value. |
2908 | if (span === 0) { | |
2909 | if (maxY !== 0) { | |
2910 | span = Math.abs(maxY); | |
2911 | } else { | |
2912 | // ... and if the sole value is zero, use range 0-1. | |
2913 | maxY = 1; | |
2914 | span = 1; | |
2915 | } | |
2916 | } | |
2917 | ||
758a629f | 2918 | var maxAxisY, minAxisY; |
ec40f67c | 2919 | if (logscale) { |
fa460473 KW |
2920 | if (ypadCompat) { |
2921 | maxAxisY = maxY + ypad * span; | |
2922 | minAxisY = minY; | |
2923 | } else { | |
2924 | var logpad = Math.exp(Math.log(span) * ypad); | |
2925 | maxAxisY = maxY * logpad; | |
2926 | minAxisY = minY / logpad; | |
2927 | } | |
ff022deb | 2928 | } else { |
fa460473 KW |
2929 | maxAxisY = maxY + ypad * span; |
2930 | minAxisY = minY - ypad * span; | |
f09fc545 | 2931 | |
fa460473 KW |
2932 | // Backwards-compatible behavior: Move the span to start or end at zero if it's |
2933 | // close to zero, but not if avoidMinZero is set. | |
b0963cdb | 2934 | if (ypadCompat && !this.getBooleanOption("avoidMinZero")) { |
ff022deb RK |
2935 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; |
2936 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
2937 | } | |
f09fc545 | 2938 | } |
4cac8c7a RK |
2939 | axis.extremeRange = [minAxisY, maxAxisY]; |
2940 | } | |
2941 | if (axis.valueWindow) { | |
2942 | // This is only set if the user has zoomed on the y-axis. It is never set | |
2943 | // by a user. It takes precedence over axis.valueRange because, if you set | |
2944 | // valueRange, you'd still expect to be able to pan. | |
2945 | axis.computedValueRange = [axis.valueWindow[0], axis.valueWindow[1]]; | |
2946 | } else if (axis.valueRange) { | |
2947 | // This is a user-set value range for this axis. | |
fa460473 KW |
2948 | var y0 = isNullUndefinedOrNaN(axis.valueRange[0]) ? axis.extremeRange[0] : axis.valueRange[0]; |
2949 | var y1 = isNullUndefinedOrNaN(axis.valueRange[1]) ? axis.extremeRange[1] : axis.valueRange[1]; | |
2950 | if (!ypadCompat) { | |
2951 | if (axis.logscale) { | |
2952 | var logpad = Math.exp(Math.log(span) * ypad); | |
2953 | y0 *= logpad; | |
2954 | y1 /= logpad; | |
2955 | } else { | |
4bac38d8 | 2956 | span = y1 - y0; |
fa460473 KW |
2957 | y0 -= span * ypad; |
2958 | y1 += span * ypad; | |
2959 | } | |
2960 | } | |
2961 | axis.computedValueRange = [y0, y1]; | |
4cac8c7a RK |
2962 | } else { |
2963 | axis.computedValueRange = axis.extremeRange; | |
f09fc545 | 2964 | } |
9e906ae6 DE |
2965 | |
2966 | ||
383d8473 | 2967 | if (independentTicks) { |
9e906ae6 DE |
2968 | axis.independentTicks = independentTicks; |
2969 | var opts = this.optionsViewForAxis_('y' + (i ? '2' : '')); | |
2970 | var ticker = opts('ticker'); | |
48e614ac | 2971 | axis.ticks = ticker(axis.computedValueRange[0], |
9e906ae6 | 2972 | axis.computedValueRange[1], |
b504bdd2 | 2973 | this.plotter_.area.h, |
9e906ae6 DE |
2974 | opts, |
2975 | this); | |
6c5f8774 | 2976 | // Define the first independent axis as primary axis. |
e8b3c7b4 | 2977 | if (!p_axis) p_axis = axis; |
9e906ae6 DE |
2978 | } |
2979 | } | |
e8b3c7b4 | 2980 | if (p_axis === undefined) { |
eba6dd23 | 2981 | throw ("Configuration Error: At least one axis has to have the \"independentTicks\" option activated."); |
e8b3c7b4 | 2982 | } |
9e906ae6 DE |
2983 | // Add ticks. By default, all axes inherit the tick positions of the |
2984 | // primary axis. However, if an axis is specifically marked as having | |
2985 | // independent ticks, then that is permissible as well. | |
2986 | for (var i = 0; i < numAxes; i++) { | |
2987 | var axis = this.axes_[i]; | |
2988 | ||
2989 | if (!axis.independentTicks) { | |
2990 | var opts = this.optionsViewForAxis_('y' + (i ? '2' : '')); | |
2991 | var ticker = opts('ticker'); | |
0d64e596 DV |
2992 | var p_ticks = p_axis.ticks; |
2993 | var p_scale = p_axis.computedValueRange[1] - p_axis.computedValueRange[0]; | |
2994 | var scale = axis.computedValueRange[1] - axis.computedValueRange[0]; | |
2995 | var tick_values = []; | |
25f76ae3 DV |
2996 | for (var k = 0; k < p_ticks.length; k++) { |
2997 | var y_frac = (p_ticks[k].v - p_axis.computedValueRange[0]) / p_scale; | |
0d64e596 DV |
2998 | var y_val = axis.computedValueRange[0] + y_frac * scale; |
2999 | tick_values.push(y_val); | |
3000 | } | |
3001 | ||
48e614ac DV |
3002 | axis.ticks = ticker(axis.computedValueRange[0], |
3003 | axis.computedValueRange[1], | |
b504bdd2 | 3004 | this.plotter_.area.h, |
48e614ac DV |
3005 | opts, |
3006 | this, | |
3007 | tick_values); | |
0d64e596 | 3008 | } |
34fc91d4 | 3009 | } |
f09fc545 | 3010 | }; |
25f76ae3 | 3011 | |
f09fc545 | 3012 | /** |
285a6bda DV |
3013 | * Detects the type of the str (date or numeric) and sets the various |
3014 | * formatting attributes in this.attrs_ based on this type. | |
1bc88216 | 3015 | * @param {string} str An x value. |
285a6bda DV |
3016 | * @private |
3017 | */ | |
3018 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
3019 | var isDate = false; | |
0842b24b DV |
3020 | var dashPos = str.indexOf('-'); // could be 2006-01-01 _or_ 1.0e-2 |
3021 | if ((dashPos > 0 && (str[dashPos-1] != 'e' && str[dashPos-1] != 'E')) || | |
285a6bda DV |
3022 | str.indexOf('/') >= 0 || |
3023 | isNaN(parseFloat(str))) { | |
3024 | isDate = true; | |
3025 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
3026 | // TODO(danvk): remove support for this format. | |
3027 | isDate = true; | |
3028 | } | |
3029 | ||
a716aff2 RK |
3030 | this.setXAxisOptions_(isDate); |
3031 | }; | |
3032 | ||
3033 | Dygraph.prototype.setXAxisOptions_ = function(isDate) { | |
285a6bda | 3034 | if (isDate) { |
285a6bda | 3035 | this.attrs_.xValueParser = Dygraph.dateParser; |
872a6a00 | 3036 | this.attrs_.axes.x.valueFormatter = Dygraph.dateValueFormatter; |
48e614ac | 3037 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; |
872a6a00 | 3038 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisLabelFormatter; |
285a6bda | 3039 | } else { |
c39e1d93 | 3040 | /** @private (shut up, jsdoc!) */ |
285a6bda | 3041 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
48e614ac DV |
3042 | // TODO(danvk): use Dygraph.numberValueFormatter here? |
3043 | /** @private (shut up, jsdoc!) */ | |
3044 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; | |
5b9b2142 | 3045 | this.attrs_.axes.x.ticker = Dygraph.numericTicks; |
48e614ac | 3046 | this.attrs_.axes.x.axisLabelFormatter = this.attrs_.axes.x.valueFormatter; |
6a1aa64f | 3047 | } |
83b0c192 | 3048 | }; |
6a1aa64f DV |
3049 | |
3050 | /** | |
629a09ae | 3051 | * @private |
6a1aa64f DV |
3052 | * Parses a string in a special csv format. We expect a csv file where each |
3053 | * line is a date point, and the first field in each line is the date string. | |
3054 | * We also expect that all remaining fields represent series. | |
285a6bda | 3055 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f | 3056 | * date, series1, stddev1, series2, stddev2, ... |
629a09ae | 3057 | * @param {[Object]} data See above. |
285a6bda | 3058 | * |
629a09ae | 3059 | * @return [Object] An array with one entry for each row. These entries |
285a6bda DV |
3060 | * are an array of cells in that row. The first entry is the parsed x-value for |
3061 | * the row. The second, third, etc. are the y-values. These can take on one of | |
3062 | * three forms, depending on the CSV and constructor parameters: | |
3063 | * 1. numeric value | |
3064 | * 2. [ value, stddev ] | |
3065 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 3066 | */ |
285a6bda | 3067 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f | 3068 | var ret = []; |
e5763589 DV |
3069 | var line_delimiter = Dygraph.detectLineDelimiter(data); |
3070 | var lines = data.split(line_delimiter || "\n"); | |
758a629f | 3071 | var vals, j; |
3d67f03b DV |
3072 | |
3073 | // Use the default delimiter or fall back to a tab if that makes sense. | |
b0963cdb | 3074 | var delim = this.getStringOption('delimiter'); |
3d67f03b DV |
3075 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { |
3076 | delim = '\t'; | |
3077 | } | |
3078 | ||
285a6bda | 3079 | var start = 0; |
d7beab6b DV |
3080 | if (!('labels' in this.user_attrs_)) { |
3081 | // User hasn't explicitly set labels, so they're (presumably) in the CSV. | |
285a6bda | 3082 | start = 1; |
d7beab6b | 3083 | this.attrs_.labels = lines[0].split(delim); // NOTE: _not_ user_attrs_. |
34825ef5 | 3084 | this.attributes_.reparseSeries(); |
6a1aa64f | 3085 | } |
5cd7ac68 | 3086 | var line_no = 0; |
03b522a4 | 3087 | |
285a6bda DV |
3088 | var xParser; |
3089 | var defaultParserSet = false; // attempt to auto-detect x value type | |
3090 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 3091 | var outOfOrder = false; |
6a1aa64f DV |
3092 | for (var i = start; i < lines.length; i++) { |
3093 | var line = lines[i]; | |
5cd7ac68 | 3094 | line_no = i; |
758a629f | 3095 | if (line.length === 0) continue; // skip blank lines |
3d67f03b DV |
3096 | if (line[0] == '#') continue; // skip comment lines |
3097 | var inFields = line.split(delim); | |
285a6bda | 3098 | if (inFields.length < 2) continue; |
6a1aa64f DV |
3099 | |
3100 | var fields = []; | |
285a6bda DV |
3101 | if (!defaultParserSet) { |
3102 | this.detectTypeFromString_(inFields[0]); | |
b0963cdb | 3103 | xParser = this.getFunctionOption("xValueParser"); |
285a6bda DV |
3104 | defaultParserSet = true; |
3105 | } | |
3106 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
3107 | |
3108 | // If fractions are expected, parse the numbers as "A/B" | |
3109 | if (this.fractions_) { | |
758a629f | 3110 | for (j = 1; j < inFields.length; j++) { |
6a1aa64f | 3111 | // TODO(danvk): figure out an appropriate way to flag parse errors. |
758a629f | 3112 | vals = inFields[j].split("/"); |
7219edb3 | 3113 | if (vals.length != 2) { |
8a68db7d | 3114 | console.error('Expected fractional "num/den" values in CSV data ' + |
464b5f50 DV |
3115 | "but found a value '" + inFields[j] + "' on line " + |
3116 | (1 + i) + " ('" + line + "') which is not of this form."); | |
7219edb3 DV |
3117 | fields[j] = [0, 0]; |
3118 | } else { | |
55deb02f DV |
3119 | fields[j] = [Dygraph.parseFloat_(vals[0], i, line), |
3120 | Dygraph.parseFloat_(vals[1], i, line)]; | |
7219edb3 | 3121 | } |
6a1aa64f | 3122 | } |
b0963cdb | 3123 | } else if (this.getBooleanOption("errorBars")) { |
6a1aa64f | 3124 | // If there are error bars, values are (value, stddev) pairs |
7219edb3 | 3125 | if (inFields.length % 2 != 1) { |
8a68db7d | 3126 | console.error('Expected alternating (value, stdev.) pairs in CSV data ' + |
464b5f50 DV |
3127 | 'but line ' + (1 + i) + ' has an odd number of values (' + |
3128 | (inFields.length - 1) + "): '" + line + "'"); | |
7219edb3 | 3129 | } |
758a629f | 3130 | for (j = 1; j < inFields.length; j += 2) { |
55deb02f DV |
3131 | fields[(j + 1) / 2] = [Dygraph.parseFloat_(inFields[j], i, line), |
3132 | Dygraph.parseFloat_(inFields[j + 1], i, line)]; | |
7219edb3 | 3133 | } |
b0963cdb | 3134 | } else if (this.getBooleanOption("customBars")) { |
6a1aa64f | 3135 | // Bars are a low;center;high tuple |
758a629f | 3136 | for (j = 1; j < inFields.length; j++) { |
327a9279 DV |
3137 | var val = inFields[j]; |
3138 | if (/^ *$/.test(val)) { | |
3139 | fields[j] = [null, null, null]; | |
3140 | } else { | |
758a629f | 3141 | vals = val.split(";"); |
327a9279 | 3142 | if (vals.length == 3) { |
55deb02f DV |
3143 | fields[j] = [ Dygraph.parseFloat_(vals[0], i, line), |
3144 | Dygraph.parseFloat_(vals[1], i, line), | |
3145 | Dygraph.parseFloat_(vals[2], i, line) ]; | |
327a9279 | 3146 | } else { |
8a68db7d | 3147 | console.warn('When using customBars, values must be either blank ' + |
464b5f50 DV |
3148 | 'or "low;center;high" tuples (got "' + val + |
3149 | '" on line ' + (1+i)); | |
327a9279 DV |
3150 | } |
3151 | } | |
6a1aa64f DV |
3152 | } |
3153 | } else { | |
3154 | // Values are just numbers | |
758a629f | 3155 | for (j = 1; j < inFields.length; j++) { |
55deb02f | 3156 | fields[j] = Dygraph.parseFloat_(inFields[j], i, line); |
285a6bda | 3157 | } |
6a1aa64f | 3158 | } |
987840a2 DV |
3159 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
3160 | outOfOrder = true; | |
3161 | } | |
285a6bda DV |
3162 | |
3163 | if (fields.length != expectedCols) { | |
8a68db7d | 3164 | console.error("Number of columns in line " + i + " (" + fields.length + |
464b5f50 DV |
3165 | ") does not agree with number of labels (" + expectedCols + |
3166 | ") " + line); | |
285a6bda | 3167 | } |
6d0aaa09 DV |
3168 | |
3169 | // If the user specified the 'labels' option and none of the cells of the | |
3170 | // first row parsed correctly, then they probably double-specified the | |
3171 | // labels. We go with the values set in the option, discard this row and | |
3172 | // log a warning to the JS console. | |
758a629f | 3173 | if (i === 0 && this.attr_('labels')) { |
6d0aaa09 | 3174 | var all_null = true; |
758a629f | 3175 | for (j = 0; all_null && j < fields.length; j++) { |
6d0aaa09 DV |
3176 | if (fields[j]) all_null = false; |
3177 | } | |
3178 | if (all_null) { | |
8a68db7d | 3179 | console.warn("The dygraphs 'labels' option is set, but the first row " + |
464b5f50 DV |
3180 | "of CSV data ('" + line + "') appears to also contain " + |
3181 | "labels. Will drop the CSV labels and use the option " + | |
3182 | "labels."); | |
6d0aaa09 DV |
3183 | continue; |
3184 | } | |
3185 | } | |
3186 | ret.push(fields); | |
6a1aa64f | 3187 | } |
987840a2 DV |
3188 | |
3189 | if (outOfOrder) { | |
8a68db7d | 3190 | console.warn("CSV is out of order; order it correctly to speed loading."); |
758a629f | 3191 | ret.sort(function(a,b) { return a[0] - b[0]; }); |
987840a2 DV |
3192 | } |
3193 | ||
6a1aa64f DV |
3194 | return ret; |
3195 | }; | |
3196 | ||
3197 | /** | |
285a6bda DV |
3198 | * The user has provided their data as a pre-packaged JS array. If the x values |
3199 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
3200 | * are dates, we need to convert them from Date objects to ms since epoch. | |
8ef9d44d DV |
3201 | * @param {!Array} data |
3202 | * @return {Object} data with numeric x values. | |
3203 | * @private | |
285a6bda DV |
3204 | */ |
3205 | Dygraph.prototype.parseArray_ = function(data) { | |
3206 | // Peek at the first x value to see if it's numeric. | |
758a629f | 3207 | if (data.length === 0) { |
8a68db7d | 3208 | console.error("Can't plot empty data set"); |
285a6bda DV |
3209 | return null; |
3210 | } | |
758a629f | 3211 | if (data[0].length === 0) { |
8a68db7d | 3212 | console.error("Data set cannot contain an empty row"); |
285a6bda DV |
3213 | return null; |
3214 | } | |
3215 | ||
758a629f DV |
3216 | var i; |
3217 | if (this.attr_("labels") === null) { | |
8a68db7d | 3218 | console.warn("Using default labels. Set labels explicitly via 'labels' " + |
464b5f50 | 3219 | "in the options parameter"); |
285a6bda | 3220 | this.attrs_.labels = [ "X" ]; |
758a629f | 3221 | for (i = 1; i < data[0].length; i++) { |
77812e0e | 3222 | this.attrs_.labels.push("Y" + i); // Not user_attrs_. |
285a6bda | 3223 | } |
77812e0e | 3224 | this.attributes_.reparseSeries(); |
debdb88d DV |
3225 | } else { |
3226 | var num_labels = this.attr_("labels"); | |
3227 | if (num_labels.length != data[0].length) { | |
8a68db7d | 3228 | console.error("Mismatch between number of labels (" + num_labels + ")" + |
464b5f50 | 3229 | " and number of columns in array (" + data[0].length + ")"); |
debdb88d DV |
3230 | return null; |
3231 | } | |
285a6bda DV |
3232 | } |
3233 | ||
2dda3850 | 3234 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda | 3235 | // Some intelligent defaults for a date x-axis. |
872a6a00 | 3236 | this.attrs_.axes.x.valueFormatter = Dygraph.dateValueFormatter; |
48e614ac | 3237 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; |
872a6a00 | 3238 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisLabelFormatter; |
285a6bda DV |
3239 | |
3240 | // Assume they're all dates. | |
e3ab7b40 | 3241 | var parsedData = Dygraph.clone(data); |
758a629f DV |
3242 | for (i = 0; i < data.length; i++) { |
3243 | if (parsedData[i].length === 0) { | |
8a68db7d | 3244 | console.error("Row " + (1 + i) + " of data is empty"); |
285a6bda DV |
3245 | return null; |
3246 | } | |
758a629f DV |
3247 | if (parsedData[i][0] === null || |
3248 | typeof(parsedData[i][0].getTime) != 'function' || | |
3249 | isNaN(parsedData[i][0].getTime())) { | |
8a68db7d | 3250 | console.error("x value in row " + (1 + i) + " is not a Date"); |
285a6bda DV |
3251 | return null; |
3252 | } | |
3253 | parsedData[i][0] = parsedData[i][0].getTime(); | |
3254 | } | |
3255 | return parsedData; | |
3256 | } else { | |
3257 | // Some intelligent defaults for a numeric x-axis. | |
c39e1d93 | 3258 | /** @private (shut up, jsdoc!) */ |
48e614ac | 3259 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; |
5b9b2142 | 3260 | this.attrs_.axes.x.ticker = Dygraph.numericTicks; |
a716aff2 | 3261 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.numberAxisLabelFormatter; |
285a6bda DV |
3262 | return data; |
3263 | } | |
3264 | }; | |
3265 | ||
3266 | /** | |
79420a1e DV |
3267 | * Parses a DataTable object from gviz. |
3268 | * The data is expected to have a first column that is either a date or a | |
3269 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
3270 | * between this.xValueParser_ and the type of the first column, it will be | |
a685723c | 3271 | * fixed. Fills out rawData_. |
1bc88216 | 3272 | * @param {!google.visualization.DataTable} data See above. |
79420a1e DV |
3273 | * @private |
3274 | */ | |
285a6bda | 3275 | Dygraph.prototype.parseDataTable_ = function(data) { |
5829af3d | 3276 | var shortTextForAnnotationNum = function(num) { |
3277 | // converts [0-9]+ [A-Z][a-z]* | |
3278 | // example: 0=A, 1=B, 25=Z, 26=Aa, 27=Ab | |
3279 | // and continues like.. Ba Bb .. Za .. Zz..Aaa...Zzz Aaaa Zzzz | |
3280 | var shortText = String.fromCharCode(65 /* A */ + num % 26); | |
3281 | num = Math.floor(num / 26); | |
3282 | while ( num > 0 ) { | |
3283 | shortText = String.fromCharCode(65 /* A */ + (num - 1) % 26 ) + shortText.toLowerCase(); | |
3284 | num = Math.floor((num - 1) / 26); | |
3285 | } | |
3286 | return shortText; | |
42a9ebb8 | 3287 | }; |
5829af3d | 3288 | |
79420a1e DV |
3289 | var cols = data.getNumberOfColumns(); |
3290 | var rows = data.getNumberOfRows(); | |
3291 | ||
d955e223 | 3292 | var indepType = data.getColumnType(0); |
4440f6c8 | 3293 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda | 3294 | this.attrs_.xValueParser = Dygraph.dateParser; |
872a6a00 | 3295 | this.attrs_.axes.x.valueFormatter = Dygraph.dateValueFormatter; |
48e614ac | 3296 | this.attrs_.axes.x.ticker = Dygraph.dateTicker; |
872a6a00 | 3297 | this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisLabelFormatter; |
33127159 | 3298 | } else if (indepType == 'number') { |
285a6bda | 3299 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
48e614ac | 3300 | this.attrs_.axes.x.valueFormatter = function(x) { return x; }; |
5b9b2142 | 3301 | this.attrs_.axes.x.ticker = Dygraph.numericTicks; |
48e614ac | 3302 | this.attrs_.axes.x.axisLabelFormatter = this.attrs_.axes.x.valueFormatter; |
285a6bda | 3303 | } else { |
8a68db7d | 3304 | console.error("only 'date', 'datetime' and 'number' types are supported " + |
464b5f50 | 3305 | "for column 1 of DataTable input (Got '" + indepType + "')"); |
79420a1e DV |
3306 | return null; |
3307 | } | |
3308 | ||
a685723c DV |
3309 | // Array of the column indices which contain data (and not annotations). |
3310 | var colIdx = []; | |
3311 | var annotationCols = {}; // data index -> [annotation cols] | |
3312 | var hasAnnotations = false; | |
758a629f DV |
3313 | var i, j; |
3314 | for (i = 1; i < cols; i++) { | |
a685723c DV |
3315 | var type = data.getColumnType(i); |
3316 | if (type == 'number') { | |
3317 | colIdx.push(i); | |
b0963cdb | 3318 | } else if (type == 'string' && this.getBooleanOption('displayAnnotations')) { |
a685723c DV |
3319 | // This is OK -- it's an annotation column. |
3320 | var dataIdx = colIdx[colIdx.length - 1]; | |
3321 | if (!annotationCols.hasOwnProperty(dataIdx)) { | |
3322 | annotationCols[dataIdx] = [i]; | |
3323 | } else { | |
3324 | annotationCols[dataIdx].push(i); | |
3325 | } | |
3326 | hasAnnotations = true; | |
3327 | } else { | |
8a68db7d | 3328 | console.error("Only 'number' is supported as a dependent type with Gviz." + |
464b5f50 | 3329 | " 'string' is only supported if displayAnnotations is true"); |
a685723c DV |
3330 | } |
3331 | } | |
3332 | ||
3333 | // Read column labels | |
3334 | // TODO(danvk): add support back for errorBars | |
3335 | var labels = [data.getColumnLabel(0)]; | |
758a629f | 3336 | for (i = 0; i < colIdx.length; i++) { |
a685723c | 3337 | labels.push(data.getColumnLabel(colIdx[i])); |
b0963cdb | 3338 | if (this.getBooleanOption("errorBars")) i += 1; |
a685723c DV |
3339 | } |
3340 | this.attrs_.labels = labels; | |
3341 | cols = labels.length; | |
3342 | ||
79420a1e | 3343 | var ret = []; |
987840a2 | 3344 | var outOfOrder = false; |
a685723c | 3345 | var annotations = []; |
758a629f | 3346 | for (i = 0; i < rows; i++) { |
79420a1e | 3347 | var row = []; |
debe4434 DV |
3348 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
3349 | data.getValue(i, 0) === null) { | |
8a68db7d | 3350 | console.warn("Ignoring row " + i + |
464b5f50 | 3351 | " of DataTable because of undefined or null first column."); |
debe4434 DV |
3352 | continue; |
3353 | } | |
3354 | ||
c21d2c2d | 3355 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
3356 | row.push(data.getValue(i, 0).getTime()); |
3357 | } else { | |
3358 | row.push(data.getValue(i, 0)); | |
3359 | } | |
b0963cdb | 3360 | if (!this.getBooleanOption("errorBars")) { |
758a629f | 3361 | for (j = 0; j < colIdx.length; j++) { |
a685723c DV |
3362 | var col = colIdx[j]; |
3363 | row.push(data.getValue(i, col)); | |
3364 | if (hasAnnotations && | |
3365 | annotationCols.hasOwnProperty(col) && | |
758a629f | 3366 | data.getValue(i, annotationCols[col][0]) !== null) { |
a685723c DV |
3367 | var ann = {}; |
3368 | ann.series = data.getColumnLabel(col); | |
3369 | ann.xval = row[0]; | |
5829af3d | 3370 | ann.shortText = shortTextForAnnotationNum(annotations.length); |
a685723c DV |
3371 | ann.text = ''; |
3372 | for (var k = 0; k < annotationCols[col].length; k++) { | |
3373 | if (k) ann.text += "\n"; | |
3374 | ann.text += data.getValue(i, annotationCols[col][k]); | |
3375 | } | |
3376 | annotations.push(ann); | |
3377 | } | |
3e3f84e4 | 3378 | } |
92fd68d8 DV |
3379 | |
3380 | // Strip out infinities, which give dygraphs problems later on. | |
758a629f | 3381 | for (j = 0; j < row.length; j++) { |
92fd68d8 DV |
3382 | if (!isFinite(row[j])) row[j] = null; |
3383 | } | |
3e3f84e4 | 3384 | } else { |
758a629f | 3385 | for (j = 0; j < cols - 1; j++) { |
3e3f84e4 DV |
3386 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); |
3387 | } | |
79420a1e | 3388 | } |
987840a2 DV |
3389 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
3390 | outOfOrder = true; | |
3391 | } | |
243d96e8 | 3392 | ret.push(row); |
79420a1e | 3393 | } |
987840a2 DV |
3394 | |
3395 | if (outOfOrder) { | |
8a68db7d | 3396 | console.warn("DataTable is out of order; order it correctly to speed loading."); |
758a629f | 3397 | ret.sort(function(a,b) { return a[0] - b[0]; }); |
987840a2 | 3398 | } |
a685723c DV |
3399 | this.rawData_ = ret; |
3400 | ||
3401 | if (annotations.length > 0) { | |
3402 | this.setAnnotations(annotations, true); | |
3403 | } | |
0fa724fd | 3404 | this.attributes_.reparseSeries(); |
758a629f | 3405 | }; |
79420a1e | 3406 | |
629a09ae | 3407 | /** |
6f5f0b2b DV |
3408 | * Signals to plugins that the chart data has updated. |
3409 | * This happens after the data has updated but before the chart has redrawn. | |
3410 | */ | |
3411 | Dygraph.prototype.cascadeDataDidUpdateEvent_ = function() { | |
3412 | // TODO(danvk): there are some issues checking xAxisRange() and using | |
3413 | // toDomCoords from handlers of this event. The visible range should be set | |
3414 | // when the chart is drawn, not derived from the data. | |
3415 | this.cascadeEvents_('dataDidUpdate', {}); | |
3416 | }; | |
3417 | ||
3418 | /** | |
6a1aa64f DV |
3419 | * Get the CSV data. If it's in a function, call that function. If it's in a |
3420 | * file, do an XMLHttpRequest to get it. | |
3421 | * @private | |
3422 | */ | |
285a6bda | 3423 | Dygraph.prototype.start_ = function() { |
36d4fabf RK |
3424 | var data = this.file_; |
3425 | ||
3426 | // Functions can return references of all other types. | |
3427 | if (typeof data == 'function') { | |
3428 | data = data(); | |
3429 | } | |
3430 | ||
3431 | if (Dygraph.isArrayLike(data)) { | |
3432 | this.rawData_ = this.parseArray_(data); | |
6f5f0b2b | 3433 | this.cascadeDataDidUpdateEvent_(); |
26ca7938 | 3434 | this.predraw_(); |
36d4fabf RK |
3435 | } else if (typeof data == 'object' && |
3436 | typeof data.getColumnRange == 'function') { | |
79420a1e | 3437 | // must be a DataTable from gviz. |
36d4fabf | 3438 | this.parseDataTable_(data); |
6f5f0b2b | 3439 | this.cascadeDataDidUpdateEvent_(); |
26ca7938 | 3440 | this.predraw_(); |
36d4fabf | 3441 | } else if (typeof data == 'string') { |
285a6bda | 3442 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. |
e5763589 DV |
3443 | var line_delimiter = Dygraph.detectLineDelimiter(data); |
3444 | if (line_delimiter) { | |
36d4fabf | 3445 | this.loadedEvent_(data); |
285a6bda | 3446 | } else { |
efc5160f DV |
3447 | // REMOVE_FOR_IE |
3448 | var req; | |
3449 | if (window.XMLHttpRequest) { | |
3450 | // Firefox, Opera, IE7, and other browsers will use the native object | |
3451 | req = new XMLHttpRequest(); | |
3452 | } else { | |
3453 | // IE 5 and 6 will use the ActiveX control | |
3454 | req = new ActiveXObject("Microsoft.XMLHTTP"); | |
3455 | } | |
3456 | ||
285a6bda DV |
3457 | var caller = this; |
3458 | req.onreadystatechange = function () { | |
3459 | if (req.readyState == 4) { | |
758a629f DV |
3460 | if (req.status === 200 || // Normal http |
3461 | req.status === 0) { // Chrome w/ --allow-file-access-from-files | |
285a6bda DV |
3462 | caller.loadedEvent_(req.responseText); |
3463 | } | |
6a1aa64f | 3464 | } |
285a6bda | 3465 | }; |
6a1aa64f | 3466 | |
36d4fabf | 3467 | req.open("GET", data, true); |
285a6bda DV |
3468 | req.send(null); |
3469 | } | |
3470 | } else { | |
8a68db7d | 3471 | console.error("Unknown data format: " + (typeof data)); |
6a1aa64f DV |
3472 | } |
3473 | }; | |
3474 | ||
3475 | /** | |
3476 | * Changes various properties of the graph. These can include: | |
3477 | * <ul> | |
3478 | * <li>file: changes the source data for the graph</li> | |
3479 | * <li>errorBars: changes whether the data contains stddev</li> | |
3480 | * </ul> | |
dcb25130 | 3481 | * |
ccfcc169 DV |
3482 | * There's a huge variety of options that can be passed to this method. For a |
3483 | * full list, see http://dygraphs.com/options.html. | |
3484 | * | |
8ef9d44d DV |
3485 | * @param {Object} input_attrs The new properties and values |
3486 | * @param {boolean} block_redraw Usually the chart is redrawn after every | |
3487 | * call to updateOptions(). If you know better, you can pass true to | |
3488 | * explicitly block the redraw. This can be useful for chaining | |
3489 | * updateOptions() calls, avoiding the occasional infinite loop and | |
3490 | * preventing redraws when it's not necessary (e.g. when updating a | |
3491 | * callback). | |
6a1aa64f | 3492 | */ |
48e614ac | 3493 | Dygraph.prototype.updateOptions = function(input_attrs, block_redraw) { |
ccfcc169 DV |
3494 | if (typeof(block_redraw) == 'undefined') block_redraw = false; |
3495 | ||
48e614ac | 3496 | // mapLegacyOptions_ drops the "file" parameter as a convenience to us. |
758a629f | 3497 | var file = input_attrs.file; |
48e614ac DV |
3498 | var attrs = Dygraph.mapLegacyOptions_(input_attrs); |
3499 | ||
ccfcc169 | 3500 | // TODO(danvk): this is a mess. Move these options into attr_. |
c65f2303 | 3501 | if ('rollPeriod' in attrs) { |
6a1aa64f DV |
3502 | this.rollPeriod_ = attrs.rollPeriod; |
3503 | } | |
c65f2303 | 3504 | if ('dateWindow' in attrs) { |
6a1aa64f | 3505 | this.dateWindow_ = attrs.dateWindow; |
e5152598 | 3506 | if (!('isZoomedIgnoreProgrammaticZoom' in attrs)) { |
758a629f | 3507 | this.zoomed_x_ = (attrs.dateWindow !== null); |
81856f70 | 3508 | } |
b7e5862d | 3509 | } |
e5152598 | 3510 | if ('valueRange' in attrs && !('isZoomedIgnoreProgrammaticZoom' in attrs)) { |
758a629f | 3511 | this.zoomed_y_ = (attrs.valueRange !== null); |
6a1aa64f | 3512 | } |
450fe64b DV |
3513 | |
3514 | // TODO(danvk): validate per-series options. | |
46dde5f9 DV |
3515 | // Supported: |
3516 | // strokeWidth | |
3517 | // pointSize | |
3518 | // drawPoints | |
3519 | // highlightCircleSize | |
450fe64b | 3520 | |
9ca829f2 DV |
3521 | // Check if this set options will require new points. |
3522 | var requiresNewPoints = Dygraph.isPixelChangingOptionList(this.attr_("labels"), attrs); | |
3523 | ||
48e614ac | 3524 | Dygraph.updateDeep(this.user_attrs_, attrs); |
285a6bda | 3525 | |
b635457c RK |
3526 | this.attributes_.reparseSeries(); |
3527 | ||
48e614ac | 3528 | if (file) { |
6f5f0b2b DV |
3529 | // This event indicates that the data is about to change, but hasn't yet. |
3530 | // TODO(danvk): support cancelation of the update via this event. | |
3531 | this.cascadeEvents_('dataWillUpdate', {}); | |
3532 | ||
48e614ac | 3533 | this.file_ = file; |
ccfcc169 | 3534 | if (!block_redraw) this.start_(); |
6a1aa64f | 3535 | } else { |
9ca829f2 DV |
3536 | if (!block_redraw) { |
3537 | if (requiresNewPoints) { | |
48e614ac | 3538 | this.predraw_(); |
9ca829f2 | 3539 | } else { |
e2c21500 | 3540 | this.renderGraph_(false); |
9ca829f2 DV |
3541 | } |
3542 | } | |
6a1aa64f DV |
3543 | } |
3544 | }; | |
3545 | ||
3546 | /** | |
48e614ac DV |
3547 | * Returns a copy of the options with deprecated names converted into current |
3548 | * names. Also drops the (potentially-large) 'file' attribute. If the caller is | |
3549 | * interested in that, they should save a copy before calling this. | |
3550 | * @private | |
3551 | */ | |
3552 | Dygraph.mapLegacyOptions_ = function(attrs) { | |
3553 | var my_attrs = {}; | |
3554 | for (var k in attrs) { | |
3ce712e6 | 3555 | if (!attrs.hasOwnProperty(k)) continue; |
48e614ac DV |
3556 | if (k == 'file') continue; |
3557 | if (attrs.hasOwnProperty(k)) my_attrs[k] = attrs[k]; | |
3558 | } | |
3559 | ||
3560 | var set = function(axis, opt, value) { | |
3561 | if (!my_attrs.axes) my_attrs.axes = {}; | |
3562 | if (!my_attrs.axes[axis]) my_attrs.axes[axis] = {}; | |
3563 | my_attrs.axes[axis][opt] = value; | |
3564 | }; | |
3565 | var map = function(opt, axis, new_opt) { | |
3566 | if (typeof(attrs[opt]) != 'undefined') { | |
8a68db7d | 3567 | console.warn("Option " + opt + " is deprecated. Use the " + |
a9172eb1 | 3568 | new_opt + " option for the " + axis + " axis instead. " + |
33a10307 RK |
3569 | "(e.g. { axes : { " + axis + " : { " + new_opt + " : ... } } } " + |
3570 | "(see http://dygraphs.com/per-axis.html for more information."); | |
48e614ac DV |
3571 | set(axis, new_opt, attrs[opt]); |
3572 | delete my_attrs[opt]; | |
3573 | } | |
3574 | }; | |
3575 | ||
3576 | // This maps, e.g., xValueFormater -> axes: { x: { valueFormatter: ... } } | |
3577 | map('xValueFormatter', 'x', 'valueFormatter'); | |
3578 | map('pixelsPerXLabel', 'x', 'pixelsPerLabel'); | |
3579 | map('xAxisLabelFormatter', 'x', 'axisLabelFormatter'); | |
3580 | map('xTicker', 'x', 'ticker'); | |
3581 | map('yValueFormatter', 'y', 'valueFormatter'); | |
3582 | map('pixelsPerYLabel', 'y', 'pixelsPerLabel'); | |
3583 | map('yAxisLabelFormatter', 'y', 'axisLabelFormatter'); | |
3584 | map('yTicker', 'y', 'ticker'); | |
7f6a7190 RK |
3585 | map('drawXGrid', 'x', 'drawGrid'); |
3586 | map('drawXAxis', 'x', 'drawAxis'); | |
3587 | map('drawYGrid', 'y', 'drawGrid'); | |
3588 | map('drawYAxis', 'y', 'drawAxis'); | |
e0269a3d DV |
3589 | map('xAxisLabelWidth', 'x', 'axisLabelWidth'); |
3590 | map('yAxisLabelWidth', 'y', 'axisLabelWidth'); | |
48e614ac DV |
3591 | return my_attrs; |
3592 | }; | |
3593 | ||
3594 | /** | |
697e70b2 DV |
3595 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
3596 | * containing div (which has presumably changed size since the dygraph was | |
3597 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
3598 | * |
3599 | * This is far more efficient than destroying and re-instantiating a | |
3600 | * Dygraph, since it doesn't have to reparse the underlying data. | |
3601 | * | |
1bc88216 DV |
3602 | * @param {number} width Width (in pixels) |
3603 | * @param {number} height Height (in pixels) | |
697e70b2 DV |
3604 | */ |
3605 | Dygraph.prototype.resize = function(width, height) { | |
e8c7ef86 DV |
3606 | if (this.resize_lock) { |
3607 | return; | |
3608 | } | |
3609 | this.resize_lock = true; | |
3610 | ||
697e70b2 | 3611 | if ((width === null) != (height === null)) { |
8a68db7d | 3612 | console.warn("Dygraph.resize() should be called with zero parameters or " + |
464b5f50 | 3613 | "two non-NULL parameters. Pretending it was zero."); |
697e70b2 DV |
3614 | width = height = null; |
3615 | } | |
3616 | ||
4b4d1a63 DV |
3617 | var old_width = this.width_; |
3618 | var old_height = this.height_; | |
b16e6369 | 3619 | |
697e70b2 DV |
3620 | if (width) { |
3621 | this.maindiv_.style.width = width + "px"; | |
3622 | this.maindiv_.style.height = height + "px"; | |
3623 | this.width_ = width; | |
3624 | this.height_ = height; | |
3625 | } else { | |
ccd9d7c2 PF |
3626 | this.width_ = this.maindiv_.clientWidth; |
3627 | this.height_ = this.maindiv_.clientHeight; | |
697e70b2 DV |
3628 | } |
3629 | ||
4b4d1a63 | 3630 | if (old_width != this.width_ || old_height != this.height_) { |
d82a3164 KW |
3631 | // Resizing a canvas erases it, even when the size doesn't change, so |
3632 | // any resize needs to be followed by a redraw. | |
3633 | this.resizeElements_(); | |
4b4d1a63 DV |
3634 | this.predraw_(); |
3635 | } | |
e8c7ef86 DV |
3636 | |
3637 | this.resize_lock = false; | |
697e70b2 DV |
3638 | }; |
3639 | ||
3640 | /** | |
6faebb69 | 3641 | * Adjusts the number of points in the rolling average. Updates the graph to |
6a1aa64f | 3642 | * reflect the new averaging period. |
1bc88216 | 3643 | * @param {number} length Number of points over which to average the data. |
6a1aa64f | 3644 | */ |
285a6bda | 3645 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f | 3646 | this.rollPeriod_ = length; |
26ca7938 | 3647 | this.predraw_(); |
6a1aa64f | 3648 | }; |
540d00f1 | 3649 | |
f8cfec73 | 3650 | /** |
1cf11047 DV |
3651 | * Returns a boolean array of visibility statuses. |
3652 | */ | |
3653 | Dygraph.prototype.visibility = function() { | |
3654 | // Do lazy-initialization, so that this happens after we know the number of | |
3655 | // data series. | |
b0963cdb | 3656 | if (!this.getOption("visibility")) { |
758a629f | 3657 | this.attrs_.visibility = []; |
1cf11047 | 3658 | } |
758a629f | 3659 | // TODO(danvk): it looks like this could go into an infinite loop w/ user_attrs. |
b0963cdb | 3660 | while (this.getOption("visibility").length < this.numColumns() - 1) { |
758a629f | 3661 | this.attrs_.visibility.push(true); |
1cf11047 | 3662 | } |
b0963cdb | 3663 | return this.getOption("visibility"); |
1cf11047 DV |
3664 | }; |
3665 | ||
3666 | /** | |
3667 | * Changes the visiblity of a series. | |
2aed8ad8 | 3668 | * |
7e64db42 RK |
3669 | * @param {number} num the series index |
3670 | * @param {boolean} value true or false, identifying the visibility. | |
1cf11047 DV |
3671 | */ |
3672 | Dygraph.prototype.setVisibility = function(num, value) { | |
3673 | var x = this.visibility(); | |
a6c109c1 | 3674 | if (num < 0 || num >= x.length) { |
8a68db7d | 3675 | console.warn("invalid series number in setVisibility: " + num); |
1cf11047 DV |
3676 | } else { |
3677 | x[num] = value; | |
26ca7938 | 3678 | this.predraw_(); |
1cf11047 DV |
3679 | } |
3680 | }; | |
3681 | ||
3682 | /** | |
0cb9bd91 DV |
3683 | * How large of an area will the dygraph render itself in? |
3684 | * This is used for testing. | |
3685 | * @return A {width: w, height: h} object. | |
3686 | * @private | |
3687 | */ | |
3688 | Dygraph.prototype.size = function() { | |
3689 | return { width: this.width_, height: this.height_ }; | |
3690 | }; | |
3691 | ||
3692 | /** | |
5c528fa2 | 3693 | * Update the list of annotations and redraw the chart. |
41ee764f DV |
3694 | * See dygraphs.com/annotations.html for more info on how to use annotations. |
3695 | * @param ann {Array} An array of annotation objects. | |
3696 | * @param suppressDraw {Boolean} Set to "true" to block chart redraw (optional). | |
5c528fa2 | 3697 | */ |
a685723c | 3698 | Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { |
3c51ab74 DV |
3699 | // Only add the annotation CSS rule once we know it will be used. |
3700 | Dygraph.addAnnotationRule(); | |
5c528fa2 | 3701 | this.annotations_ = ann; |
af6e4ad5 | 3702 | if (!this.layout_) { |
8a68db7d | 3703 | console.warn("Tried to setAnnotations before dygraph was ready. " + |
464b5f50 DV |
3704 | "Try setting them in a ready() block. See " + |
3705 | "dygraphs.com/tests/annotation.html"); | |
af6e4ad5 DV |
3706 | return; |
3707 | } | |
3708 | ||
5c528fa2 | 3709 | this.layout_.setAnnotations(this.annotations_); |
a685723c | 3710 | if (!suppressDraw) { |
26ca7938 | 3711 | this.predraw_(); |
a685723c | 3712 | } |
5c528fa2 DV |
3713 | }; |
3714 | ||
3715 | /** | |
3716 | * Return the list of annotations. | |
3717 | */ | |
3718 | Dygraph.prototype.annotations = function() { | |
3719 | return this.annotations_; | |
3720 | }; | |
3721 | ||
46dde5f9 | 3722 | /** |
82c6fe4d KW |
3723 | * Get the list of label names for this graph. The first column is the |
3724 | * x-axis, so the data series names start at index 1. | |
4c10c8d2 RK |
3725 | * |
3726 | * Returns null when labels have not yet been defined. | |
82c6fe4d | 3727 | */ |
e2c21500 | 3728 | Dygraph.prototype.getLabels = function() { |
4c10c8d2 RK |
3729 | var labels = this.attr_("labels"); |
3730 | return labels ? labels.slice() : null; | |
82c6fe4d KW |
3731 | }; |
3732 | ||
3733 | /** | |
46dde5f9 DV |
3734 | * Get the index of a series (column) given its name. The first column is the |
3735 | * x-axis, so the data series start with index 1. | |
3736 | */ | |
3737 | Dygraph.prototype.indexFromSetName = function(name) { | |
82c6fe4d | 3738 | return this.setIndexByName_[name]; |
46dde5f9 DV |
3739 | }; |
3740 | ||
629a09ae | 3741 | /** |
5bcc58b4 DV |
3742 | * Trigger a callback when the dygraph has drawn itself and is ready to be |
3743 | * manipulated. This is primarily useful when dygraphs has to do an XHR for the | |
3744 | * data (i.e. a URL is passed as the data source) and the chart is drawn | |
3745 | * asynchronously. If the chart has already drawn, the callback will fire | |
3746 | * immediately. | |
3747 | * | |
3748 | * This is a good place to call setAnnotation(). | |
3749 | * | |
3750 | * @param {function(!Dygraph)} callback The callback to trigger when the chart | |
3751 | * is ready. | |
3752 | */ | |
3753 | Dygraph.prototype.ready = function(callback) { | |
3754 | if (this.is_initial_draw_) { | |
3755 | this.readyFns_.push(callback); | |
3756 | } else { | |
4ee251cb | 3757 | callback.call(this, this); |
5bcc58b4 DV |
3758 | } |
3759 | }; | |
3760 | ||
3761 | /** | |
629a09ae DV |
3762 | * @private |
3763 | * Adds a default style for the annotation CSS classes to the document. This is | |
3764 | * only executed when annotations are actually used. It is designed to only be | |
3765 | * called once -- all calls after the first will return immediately. | |
3766 | */ | |
5c528fa2 | 3767 | Dygraph.addAnnotationRule = function() { |
d38c6191 | 3768 | // TODO(danvk): move this function into plugins/annotations.js? |
5c528fa2 DV |
3769 | if (Dygraph.addedAnnotationCSS) return; |
3770 | ||
5c528fa2 DV |
3771 | var rule = "border: 1px solid black; " + |
3772 | "background-color: white; " + | |
3773 | "text-align: center;"; | |
22186871 DV |
3774 | |
3775 | var styleSheetElement = document.createElement("style"); | |
3776 | styleSheetElement.type = "text/css"; | |
3777 | document.getElementsByTagName("head")[0].appendChild(styleSheetElement); | |
3778 | ||
3779 | // Find the first style sheet that we can access. | |
3780 | // We may not add a rule to a style sheet from another domain for security | |
3781 | // reasons. This sometimes comes up when using gviz, since the Google gviz JS | |
3782 | // adds its own style sheets from google.com. | |
3783 | for (var i = 0; i < document.styleSheets.length; i++) { | |
3784 | if (document.styleSheets[i].disabled) continue; | |
3785 | var mysheet = document.styleSheets[i]; | |
3786 | try { | |
3787 | if (mysheet.insertRule) { // Firefox | |
3788 | var idx = mysheet.cssRules ? mysheet.cssRules.length : 0; | |
3789 | mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", idx); | |
3790 | } else if (mysheet.addRule) { // IE | |
3791 | mysheet.addRule(".dygraphDefaultAnnotation", rule); | |
3792 | } | |
3793 | Dygraph.addedAnnotationCSS = true; | |
3794 | return; | |
3795 | } catch(err) { | |
3796 | // Was likely a security exception. | |
3797 | } | |
5c528fa2 DV |
3798 | } |
3799 | ||
8a68db7d | 3800 | console.warn("Unable to add default annotation CSS rule; display may be off."); |
758a629f | 3801 | }; |
8887663f DV |
3802 | |
3803 | return Dygraph; | |
3804 | ||
3805 | })(); |