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6a1aa64f DV |
1 | // Copyright 2006 Dan Vanderkam (danvdk@gmail.com) |
2 | // All Rights Reserved. | |
3 | ||
4 | /** | |
3df0ccf0 DV |
5 | * @fileoverview Based on PlotKit, but modified to meet the needs of dygraphs. |
6 | * In particular, support for: | |
0abfbd7e | 7 | * - grid overlays |
3df0ccf0 DV |
8 | * - error bars |
9 | * - dygraphs attribute system | |
ad1798c2 DV |
10 | * |
11 | * High level overview of classes: | |
12 | * | |
13 | * - DygraphLayout | |
14 | * This contains all the data to be charted. | |
15 | * It uses data coordinates, but also records the chart range (in data | |
16 | * coordinates) and hence is able to calculate percentage positions ('In | |
17 | * this view, Point A lies 25% down the x-axis.') | |
18 | * Two things that it does not do are: | |
19 | * 1. Record pixel coordinates for anything. | |
20 | * 2. (oddly) determine anything about the layout of chart elements. | |
21 | * The naming is a vestige of Dygraph's original PlotKit roots. | |
22 | * | |
23 | * - DygraphCanvasRenderer | |
24 | * This class determines the charting area (in pixel coordinates), maps the | |
25 | * percentage coordinates in the DygraphLayout to pixels and draws them. | |
26 | * It's also responsible for creating chart DOM elements, i.e. annotations, | |
27 | * tick mark labels, the title and the x/y-axis labels. | |
6a1aa64f DV |
28 | */ |
29 | ||
6a1aa64f | 30 | /** |
3df0ccf0 | 31 | * Creates a new DygraphLayout object. |
6a1aa64f | 32 | * @param {Object} options Options for PlotKit.Layout |
285a6bda | 33 | * @return {Object} The DygraphLayout object |
6a1aa64f | 34 | */ |
efe0829a DV |
35 | DygraphLayout = function(dygraph, options) { |
36 | this.dygraph_ = dygraph; | |
37 | this.options = {}; // TODO(danvk): remove, use attr_ instead. | |
fc80a396 | 38 | Dygraph.update(this.options, options ? options : {}); |
efe0829a | 39 | this.datasets = new Array(); |
937029df | 40 | this.annotations = new Array(); |
6a1aa64f | 41 | }; |
efe0829a DV |
42 | |
43 | DygraphLayout.prototype.attr_ = function(name) { | |
44 | return this.dygraph_.attr_(name); | |
45 | }; | |
46 | ||
47 | DygraphLayout.prototype.addDataset = function(setname, set_xy) { | |
48 | this.datasets[setname] = set_xy; | |
49 | }; | |
50 | ||
5c528fa2 DV |
51 | DygraphLayout.prototype.setAnnotations = function(ann) { |
52 | // The Dygraph object's annotations aren't parsed. We parse them here and | |
70a50f94 | 53 | // save a copy. If there is no parser, then the user must be using raw format. |
973e2b79 | 54 | this.annotations = []; |
70a50f94 | 55 | var parse = this.attr_('xValueParser') || function(x) { return x; }; |
5c528fa2 DV |
56 | for (var i = 0; i < ann.length; i++) { |
57 | var a = {}; | |
a685723c | 58 | if (!ann[i].xval && !ann[i].x) { |
5c528fa2 DV |
59 | this.dygraph_.error("Annotations must have an 'x' property"); |
60 | return; | |
61 | } | |
ce5e8d36 | 62 | if (ann[i].icon && |
33030f33 DV |
63 | !(ann[i].hasOwnProperty('width') && |
64 | ann[i].hasOwnProperty('height'))) { | |
65 | this.dygraph_.error("Must set width and height when setting " + | |
ce5e8d36 DV |
66 | "annotation.icon property"); |
67 | return; | |
68 | } | |
5c528fa2 | 69 | Dygraph.update(a, ann[i]); |
a685723c | 70 | if (!a.xval) a.xval = parse(a.x); |
5c528fa2 | 71 | this.annotations.push(a); |
ce49c2fa | 72 | } |
ce49c2fa DV |
73 | }; |
74 | ||
efe0829a DV |
75 | DygraphLayout.prototype.evaluate = function() { |
76 | this._evaluateLimits(); | |
77 | this._evaluateLineCharts(); | |
78 | this._evaluateLineTicks(); | |
ce49c2fa | 79 | this._evaluateAnnotations(); |
efe0829a DV |
80 | }; |
81 | ||
82 | DygraphLayout.prototype._evaluateLimits = function() { | |
83 | this.minxval = this.maxxval = null; | |
f6401bf6 DV |
84 | if (this.options.dateWindow) { |
85 | this.minxval = this.options.dateWindow[0]; | |
86 | this.maxxval = this.options.dateWindow[1]; | |
87 | } else { | |
88 | for (var name in this.datasets) { | |
89 | if (!this.datasets.hasOwnProperty(name)) continue; | |
90 | var series = this.datasets[name]; | |
48841144 NN |
91 | if (series.length > 1) { |
92 | var x1 = series[0][0]; | |
93 | if (!this.minxval || x1 < this.minxval) this.minxval = x1; | |
94 | ||
95 | var x2 = series[series.length - 1][0]; | |
96 | if (!this.maxxval || x2 > this.maxxval) this.maxxval = x2; | |
97 | } | |
f6401bf6 | 98 | } |
efe0829a DV |
99 | } |
100 | this.xrange = this.maxxval - this.minxval; | |
101 | this.xscale = (this.xrange != 0 ? 1/this.xrange : 1.0); | |
102 | ||
ea4942ed DV |
103 | for (var i = 0; i < this.options.yAxes.length; i++) { |
104 | var axis = this.options.yAxes[i]; | |
26ca7938 DV |
105 | axis.minyval = axis.computedValueRange[0]; |
106 | axis.maxyval = axis.computedValueRange[1]; | |
ea4942ed DV |
107 | axis.yrange = axis.maxyval - axis.minyval; |
108 | axis.yscale = (axis.yrange != 0 ? 1.0 / axis.yrange : 1.0); | |
ff022deb | 109 | |
c742293b RK |
110 | if (axis.g.attr_("logscale")) { |
111 | axis.ylogrange = Dygraph.log10(axis.maxyval) - Dygraph.log10(axis.minyval); | |
112 | axis.ylogscale = (axis.ylogrange != 0 ? 1.0 / axis.ylogrange : 1.0); | |
113 | if (!isFinite(axis.ylogrange) || isNaN(axis.ylogrange)) { | |
114 | axis.g.error('axis ' + i + ' of graph at ' + axis.g + | |
115 | ' can\'t be displayed in log scale for range [' + | |
116 | axis.minyval + ' - ' + axis.maxyval + ']'); | |
117 | } | |
d03e78ed | 118 | } |
ea4942ed | 119 | } |
efe0829a DV |
120 | }; |
121 | ||
122 | DygraphLayout.prototype._evaluateLineCharts = function() { | |
123 | // add all the rects | |
124 | this.points = new Array(); | |
125 | for (var setName in this.datasets) { | |
85b99f0b DV |
126 | if (!this.datasets.hasOwnProperty(setName)) continue; |
127 | ||
128 | var dataset = this.datasets[setName]; | |
ea4942ed DV |
129 | var axis = this.options.yAxes[this.options.seriesToAxisMap[setName]]; |
130 | ||
85b99f0b DV |
131 | for (var j = 0; j < dataset.length; j++) { |
132 | var item = dataset[j]; | |
d03e78ed | 133 | |
3637724f | 134 | var yval; |
7d0e7a0d | 135 | if (axis.logscale) { |
0037b2a4 | 136 | yval = 1.0 - ((Dygraph.log10(parseFloat(item[1])) - Dygraph.log10(axis.minyval)) * axis.ylogscale); // really should just be yscale. |
ff022deb | 137 | } else { |
3637724f | 138 | yval = 1.0 - ((parseFloat(item[1]) - axis.minyval) * axis.yscale); |
ff022deb | 139 | } |
85b99f0b | 140 | var point = { |
ff00d3e2 | 141 | // TODO(danvk): here |
85b99f0b | 142 | x: ((parseFloat(item[0]) - this.minxval) * this.xscale), |
3637724f | 143 | y: yval, |
85b99f0b DV |
144 | xval: parseFloat(item[0]), |
145 | yval: parseFloat(item[1]), | |
146 | name: setName | |
147 | }; | |
148 | ||
1a26f3fb | 149 | this.points.push(point); |
85b99f0b | 150 | } |
efe0829a DV |
151 | } |
152 | }; | |
153 | ||
154 | DygraphLayout.prototype._evaluateLineTicks = function() { | |
155 | this.xticks = new Array(); | |
156 | for (var i = 0; i < this.options.xTicks.length; i++) { | |
157 | var tick = this.options.xTicks[i]; | |
158 | var label = tick.label; | |
159 | var pos = this.xscale * (tick.v - this.minxval); | |
160 | if ((pos >= 0.0) && (pos <= 1.0)) { | |
161 | this.xticks.push([pos, label]); | |
162 | } | |
163 | } | |
164 | ||
165 | this.yticks = new Array(); | |
9012dd21 | 166 | for (var i = 0; i < this.options.yAxes.length; i++ ) { |
67076b22 DV |
167 | var axis = this.options.yAxes[i]; |
168 | for (var j = 0; j < axis.ticks.length; j++) { | |
169 | var tick = axis.ticks[j]; | |
170 | var label = tick.label; | |
ff022deb | 171 | var pos = this.dygraph_.toPercentYCoord(tick.v, i); |
67076b22 | 172 | if ((pos >= 0.0) && (pos <= 1.0)) { |
9012dd21 | 173 | this.yticks.push([i, pos, label]); |
67076b22 | 174 | } |
efe0829a DV |
175 | } |
176 | } | |
177 | }; | |
178 | ||
6a1aa64f DV |
179 | |
180 | /** | |
181 | * Behaves the same way as PlotKit.Layout, but also copies the errors | |
182 | * @private | |
183 | */ | |
285a6bda | 184 | DygraphLayout.prototype.evaluateWithError = function() { |
6a1aa64f DV |
185 | this.evaluate(); |
186 | if (!this.options.errorBars) return; | |
187 | ||
188 | // Copy over the error terms | |
189 | var i = 0; // index in this.points | |
190 | for (var setName in this.datasets) { | |
85b99f0b DV |
191 | if (!this.datasets.hasOwnProperty(setName)) continue; |
192 | var j = 0; | |
193 | var dataset = this.datasets[setName]; | |
194 | for (var j = 0; j < dataset.length; j++, i++) { | |
195 | var item = dataset[j]; | |
196 | var xv = parseFloat(item[0]); | |
197 | var yv = parseFloat(item[1]); | |
198 | ||
199 | if (xv == this.points[i].xval && | |
200 | yv == this.points[i].yval) { | |
201 | this.points[i].errorMinus = parseFloat(item[2]); | |
202 | this.points[i].errorPlus = parseFloat(item[3]); | |
203 | } | |
204 | } | |
6a1aa64f DV |
205 | } |
206 | }; | |
207 | ||
ce49c2fa DV |
208 | DygraphLayout.prototype._evaluateAnnotations = function() { |
209 | // Add the annotations to the point to which they belong. | |
210 | // Make a map from (setName, xval) to annotation for quick lookups. | |
211 | var annotations = {}; | |
212 | for (var i = 0; i < this.annotations.length; i++) { | |
213 | var a = this.annotations[i]; | |
214 | annotations[a.xval + "," + a.series] = a; | |
215 | } | |
216 | ||
217 | this.annotated_points = []; | |
218 | for (var i = 0; i < this.points.length; i++) { | |
219 | var p = this.points[i]; | |
220 | var k = p.xval + "," + p.name; | |
221 | if (k in annotations) { | |
222 | p.annotation = annotations[k]; | |
223 | this.annotated_points.push(p); | |
224 | } | |
225 | } | |
226 | }; | |
227 | ||
6a1aa64f DV |
228 | /** |
229 | * Convenience function to remove all the data sets from a graph | |
230 | */ | |
285a6bda | 231 | DygraphLayout.prototype.removeAllDatasets = function() { |
6a1aa64f DV |
232 | delete this.datasets; |
233 | this.datasets = new Array(); | |
234 | }; | |
235 | ||
236 | /** | |
237 | * Change the values of various layout options | |
238 | * @param {Object} new_options an associative array of new properties | |
239 | */ | |
285a6bda | 240 | DygraphLayout.prototype.updateOptions = function(new_options) { |
fc80a396 | 241 | Dygraph.update(this.options, new_options ? new_options : {}); |
6a1aa64f DV |
242 | }; |
243 | ||
667d510b | 244 | /** |
245 | * Return a copy of the point at the indicated index, with its yval unstacked. | |
246 | * @param int index of point in layout_.points | |
247 | */ | |
8c03ba63 | 248 | DygraphLayout.prototype.unstackPointAtIndex = function(idx) { |
667d510b | 249 | var point = this.points[idx]; |
250 | ||
251 | // Clone the point since we modify it | |
252 | var unstackedPoint = {}; | |
253 | for (var i in point) { | |
254 | unstackedPoint[i] = point[i]; | |
255 | } | |
256 | ||
257 | if (!this.attr_("stackedGraph")) { | |
258 | return unstackedPoint; | |
259 | } | |
260 | ||
261 | // The unstacked yval is equal to the current yval minus the yval of the | |
262 | // next point at the same xval. | |
263 | for (var i = idx+1; i < this.points.length; i++) { | |
264 | if (this.points[i].xval == point.xval) { | |
265 | unstackedPoint.yval -= this.points[i].yval; | |
266 | break; | |
267 | } | |
268 | } | |
269 | ||
270 | return unstackedPoint; | |
271 | } | |
272 | ||
6a1aa64f DV |
273 | // Subclass PlotKit.CanvasRenderer to add: |
274 | // 1. X/Y grid overlay | |
275 | // 2. Ability to draw error bars (if required) | |
276 | ||
277 | /** | |
278 | * Sets some PlotKit.CanvasRenderer options | |
279 | * @param {Object} element The canvas to attach to | |
285a6bda | 280 | * @param {Layout} layout The DygraphLayout object for this graph. |
6a1aa64f DV |
281 | * @param {Object} options Options to pass on to CanvasRenderer |
282 | */ | |
9317362d DV |
283 | DygraphCanvasRenderer = function(dygraph, element, layout, options) { |
284 | // TODO(danvk): remove options, just use dygraph.attr_. | |
9317362d | 285 | this.dygraph_ = dygraph; |
fbe31dc8 DV |
286 | |
287 | // default options | |
288 | this.options = { | |
f474c2a3 DV |
289 | "strokeWidth": 0.5, |
290 | "drawXAxis": true, | |
291 | "drawYAxis": true, | |
292 | "axisLineColor": "black", | |
293 | "axisLineWidth": 0.5, | |
294 | "axisTickSize": 3, | |
295 | "axisLabelColor": "black", | |
296 | "axisLabelFont": "Arial", | |
297 | "axisLabelFontSize": 9, | |
298 | "axisLabelWidth": 50, | |
299 | "drawYGrid": true, | |
300 | "drawXGrid": true, | |
43af96e7 | 301 | "gridLineColor": "rgb(128,128,128)", |
e7746234 EC |
302 | "fillAlpha": 0.15, |
303 | "underlayCallback": null | |
fbe31dc8 | 304 | }; |
fc80a396 | 305 | Dygraph.update(this.options, options); |
6a1aa64f | 306 | |
fbe31dc8 | 307 | this.layout = layout; |
b0c3b730 | 308 | this.element = element; |
fbe31dc8 DV |
309 | this.container = this.element.parentNode; |
310 | ||
fbe31dc8 DV |
311 | this.height = this.element.height; |
312 | this.width = this.element.width; | |
313 | ||
314 | // --- check whether everything is ok before we return | |
315 | if (!this.isIE && !(DygraphCanvasRenderer.isSupported(this.element))) | |
316 | throw "Canvas is not supported."; | |
317 | ||
318 | // internal state | |
319 | this.xlabels = new Array(); | |
320 | this.ylabels = new Array(); | |
ce49c2fa | 321 | this.annotations = new Array(); |
ad1798c2 | 322 | this.chartLabels = {}; |
fbe31dc8 | 323 | |
ea4942ed | 324 | // TODO(danvk): consider all axes in this computation. |
fbe31dc8 | 325 | this.area = { |
9012dd21 | 326 | // TODO(danvk): per-axis setting. |
fbe31dc8 DV |
327 | x: this.options.yAxisLabelWidth + 2 * this.options.axisTickSize, |
328 | y: 0 | |
329 | }; | |
330 | this.area.w = this.width - this.area.x - this.options.rightGap; | |
331 | this.area.h = this.height - this.options.axisLabelFontSize - | |
332 | 2 * this.options.axisTickSize; | |
333 | ||
26ca7938 DV |
334 | // Shrink the drawing area to accomodate additional y-axes. |
335 | if (this.dygraph_.numAxes() == 2) { | |
336 | // TODO(danvk): per-axis setting. | |
337 | this.area.w -= (this.options.yAxisLabelWidth + 2 * this.options.axisTickSize); | |
338 | } else if (this.dygraph_.numAxes() > 2) { | |
339 | this.dygraph_.error("Only two y-axes are supported at this time. (Trying " + | |
34de8b76 | 340 | "to use " + this.dygraph_.numAxes() + ")"); |
26ca7938 DV |
341 | } |
342 | ||
ad1798c2 DV |
343 | // Add space for chart labels: title, xlabel and ylabel. |
344 | if (this.attr_('title')) { | |
ad1798c2 DV |
345 | this.area.h -= this.attr_('titleHeight'); |
346 | this.area.y += this.attr_('titleHeight'); | |
347 | } | |
348 | if (this.attr_('xlabel')) { | |
ad1798c2 DV |
349 | this.area.h -= this.attr_('xLabelHeight'); |
350 | } | |
351 | if (this.attr_('ylabel')) { | |
ca49434a DV |
352 | // It would make sense to shift the chart here to make room for the y-axis |
353 | // label, but the default yAxisLabelWidth is large enough that this results | |
354 | // in overly-padded charts. The y-axis label should fit fine. If it | |
355 | // doesn't, the yAxisLabelWidth option can be increased. | |
ad1798c2 DV |
356 | } |
357 | ||
b0c3b730 DV |
358 | this.container.style.position = "relative"; |
359 | this.container.style.width = this.width + "px"; | |
26ca7938 DV |
360 | |
361 | // Set up a clipping area for the canvas (and the interaction canvas). | |
362 | // This ensures that we don't overdraw. | |
8c21adcf | 363 | var ctx = this.dygraph_.canvas_.getContext("2d"); |
26ca7938 DV |
364 | ctx.beginPath(); |
365 | ctx.rect(this.area.x, this.area.y, this.area.w, this.area.h); | |
366 | ctx.clip(); | |
367 | ||
8c21adcf | 368 | ctx = this.dygraph_.hidden_.getContext("2d"); |
26ca7938 DV |
369 | ctx.beginPath(); |
370 | ctx.rect(this.area.x, this.area.y, this.area.w, this.area.h); | |
371 | ctx.clip(); | |
fbe31dc8 DV |
372 | }; |
373 | ||
44c6bc29 DV |
374 | DygraphCanvasRenderer.prototype.attr_ = function(x) { |
375 | return this.dygraph_.attr_(x); | |
376 | }; | |
377 | ||
fbe31dc8 DV |
378 | DygraphCanvasRenderer.prototype.clear = function() { |
379 | if (this.isIE) { | |
380 | // VML takes a while to start up, so we just poll every this.IEDelay | |
381 | try { | |
382 | if (this.clearDelay) { | |
383 | this.clearDelay.cancel(); | |
384 | this.clearDelay = null; | |
385 | } | |
386 | var context = this.element.getContext("2d"); | |
387 | } | |
388 | catch (e) { | |
76171648 | 389 | // TODO(danvk): this is broken, since MochiKit.Async is gone. |
fbe31dc8 DV |
390 | this.clearDelay = MochiKit.Async.wait(this.IEDelay); |
391 | this.clearDelay.addCallback(bind(this.clear, this)); | |
392 | return; | |
393 | } | |
394 | } | |
395 | ||
396 | var context = this.element.getContext("2d"); | |
397 | context.clearRect(0, 0, this.width, this.height); | |
398 | ||
2160ed4a | 399 | for (var i = 0; i < this.xlabels.length; i++) { |
b0c3b730 | 400 | var el = this.xlabels[i]; |
b304aaec | 401 | if (el.parentNode) el.parentNode.removeChild(el); |
2160ed4a DV |
402 | } |
403 | for (var i = 0; i < this.ylabels.length; i++) { | |
b0c3b730 | 404 | var el = this.ylabels[i]; |
b304aaec | 405 | if (el.parentNode) el.parentNode.removeChild(el); |
2160ed4a | 406 | } |
ce49c2fa DV |
407 | for (var i = 0; i < this.annotations.length; i++) { |
408 | var el = this.annotations[i]; | |
b304aaec | 409 | if (el.parentNode) el.parentNode.removeChild(el); |
ce49c2fa | 410 | } |
ad1798c2 DV |
411 | for (var k in this.chartLabels) { |
412 | if (!this.chartLabels.hasOwnProperty(k)) continue; | |
413 | var el = this.chartLabels[k]; | |
414 | if (el.parentNode) el.parentNode.removeChild(el); | |
415 | } | |
fbe31dc8 DV |
416 | this.xlabels = new Array(); |
417 | this.ylabels = new Array(); | |
ce49c2fa | 418 | this.annotations = new Array(); |
ad1798c2 | 419 | this.chartLabels = {}; |
fbe31dc8 DV |
420 | }; |
421 | ||
422 | ||
423 | DygraphCanvasRenderer.isSupported = function(canvasName) { | |
424 | var canvas = null; | |
425 | try { | |
21d3323f | 426 | if (typeof(canvasName) == 'undefined' || canvasName == null) |
b0c3b730 | 427 | canvas = document.createElement("canvas"); |
fbe31dc8 | 428 | else |
b0c3b730 | 429 | canvas = canvasName; |
fbe31dc8 DV |
430 | var context = canvas.getContext("2d"); |
431 | } | |
432 | catch (e) { | |
433 | var ie = navigator.appVersion.match(/MSIE (\d\.\d)/); | |
434 | var opera = (navigator.userAgent.toLowerCase().indexOf("opera") != -1); | |
435 | if ((!ie) || (ie[1] < 6) || (opera)) | |
436 | return false; | |
437 | return true; | |
438 | } | |
439 | return true; | |
6a1aa64f | 440 | }; |
6a1aa64f DV |
441 | |
442 | /** | |
443 | * Draw an X/Y grid on top of the existing plot | |
444 | */ | |
285a6bda | 445 | DygraphCanvasRenderer.prototype.render = function() { |
528ce7e5 DV |
446 | // Draw the new X/Y grid. Lines appear crisper when pixels are rounded to |
447 | // half-integers. This prevents them from drawing in two rows/cols. | |
6a1aa64f | 448 | var ctx = this.element.getContext("2d"); |
528ce7e5 DV |
449 | function halfUp(x){return Math.round(x)+0.5}; |
450 | function halfDown(y){return Math.round(y)-0.5}; | |
e7746234 EC |
451 | |
452 | if (this.options.underlayCallback) { | |
1e41bd2d DV |
453 | // NOTE: we pass the dygraph object to this callback twice to avoid breaking |
454 | // users who expect a deprecated form of this callback. | |
455 | this.options.underlayCallback(ctx, this.area, this.dygraph_, this.dygraph_); | |
e7746234 EC |
456 | } |
457 | ||
6a1aa64f DV |
458 | if (this.options.drawYGrid) { |
459 | var ticks = this.layout.yticks; | |
460 | ctx.save(); | |
f2f24402 | 461 | ctx.strokeStyle = this.options.gridLineColor; |
6a1aa64f DV |
462 | ctx.lineWidth = this.options.axisLineWidth; |
463 | for (var i = 0; i < ticks.length; i++) { | |
880a574f DV |
464 | // TODO(danvk): allow secondary axes to draw a grid, too. |
465 | if (ticks[i][0] != 0) continue; | |
528ce7e5 DV |
466 | var x = halfUp(this.area.x); |
467 | var y = halfDown(this.area.y + ticks[i][1] * this.area.h); | |
6a1aa64f DV |
468 | ctx.beginPath(); |
469 | ctx.moveTo(x, y); | |
470 | ctx.lineTo(x + this.area.w, y); | |
471 | ctx.closePath(); | |
472 | ctx.stroke(); | |
473 | } | |
474 | } | |
475 | ||
476 | if (this.options.drawXGrid) { | |
477 | var ticks = this.layout.xticks; | |
478 | ctx.save(); | |
f2f24402 | 479 | ctx.strokeStyle = this.options.gridLineColor; |
6a1aa64f DV |
480 | ctx.lineWidth = this.options.axisLineWidth; |
481 | for (var i=0; i<ticks.length; i++) { | |
528ce7e5 DV |
482 | var x = halfUp(this.area.x + ticks[i][0] * this.area.w); |
483 | var y = halfDown(this.area.y + this.area.h); | |
6a1aa64f | 484 | ctx.beginPath(); |
880a574f | 485 | ctx.moveTo(x, y); |
6a1aa64f DV |
486 | ctx.lineTo(x, this.area.y); |
487 | ctx.closePath(); | |
488 | ctx.stroke(); | |
489 | } | |
490 | } | |
2ce09b19 DV |
491 | |
492 | // Do the ordinary rendering, as before | |
2ce09b19 | 493 | this._renderLineChart(); |
fbe31dc8 | 494 | this._renderAxis(); |
ad1798c2 | 495 | this._renderChartLabels(); |
ce49c2fa | 496 | this._renderAnnotations(); |
fbe31dc8 DV |
497 | }; |
498 | ||
499 | ||
500 | DygraphCanvasRenderer.prototype._renderAxis = function() { | |
501 | if (!this.options.drawXAxis && !this.options.drawYAxis) | |
502 | return; | |
503 | ||
528ce7e5 DV |
504 | // Round pixels to half-integer boundaries for crisper drawing. |
505 | function halfUp(x){return Math.round(x)+0.5}; | |
506 | function halfDown(y){return Math.round(y)-0.5}; | |
507 | ||
fbe31dc8 DV |
508 | var context = this.element.getContext("2d"); |
509 | ||
34fedff8 DV |
510 | var labelStyle = { |
511 | "position": "absolute", | |
512 | "fontSize": this.options.axisLabelFontSize + "px", | |
513 | "zIndex": 10, | |
f474c2a3 | 514 | "color": this.options.axisLabelColor, |
34fedff8 DV |
515 | "width": this.options.axisLabelWidth + "px", |
516 | "overflow": "hidden" | |
517 | }; | |
518 | var makeDiv = function(txt) { | |
519 | var div = document.createElement("div"); | |
520 | for (var name in labelStyle) { | |
85b99f0b DV |
521 | if (labelStyle.hasOwnProperty(name)) { |
522 | div.style[name] = labelStyle[name]; | |
523 | } | |
fbe31dc8 | 524 | } |
34fedff8 DV |
525 | div.appendChild(document.createTextNode(txt)); |
526 | return div; | |
fbe31dc8 DV |
527 | }; |
528 | ||
529 | // axis lines | |
530 | context.save(); | |
f474c2a3 | 531 | context.strokeStyle = this.options.axisLineColor; |
fbe31dc8 DV |
532 | context.lineWidth = this.options.axisLineWidth; |
533 | ||
fbe31dc8 | 534 | if (this.options.drawYAxis) { |
8b7a0cc3 | 535 | if (this.layout.yticks && this.layout.yticks.length > 0) { |
2160ed4a DV |
536 | for (var i = 0; i < this.layout.yticks.length; i++) { |
537 | var tick = this.layout.yticks[i]; | |
fbe31dc8 DV |
538 | if (typeof(tick) == "function") return; |
539 | var x = this.area.x; | |
880a574f DV |
540 | var sgn = 1; |
541 | if (tick[0] == 1) { // right-side y-axis | |
542 | x = this.area.x + this.area.w; | |
543 | sgn = -1; | |
9012dd21 DV |
544 | } |
545 | var y = this.area.y + tick[1] * this.area.h; | |
fbe31dc8 | 546 | context.beginPath(); |
528ce7e5 DV |
547 | context.moveTo(halfUp(x), halfDown(y)); |
548 | context.lineTo(halfUp(x - sgn * this.options.axisTickSize), halfDown(y)); | |
fbe31dc8 DV |
549 | context.closePath(); |
550 | context.stroke(); | |
551 | ||
9012dd21 | 552 | var label = makeDiv(tick[2]); |
fbe31dc8 DV |
553 | var top = (y - this.options.axisLabelFontSize / 2); |
554 | if (top < 0) top = 0; | |
555 | ||
556 | if (top + this.options.axisLabelFontSize + 3 > this.height) { | |
557 | label.style.bottom = "0px"; | |
558 | } else { | |
559 | label.style.top = top + "px"; | |
560 | } | |
9012dd21 | 561 | if (tick[0] == 0) { |
ad1798c2 | 562 | label.style.left = (this.area.x - this.options.yAxisLabelWidth - this.options.axisTickSize) + "px"; |
9012dd21 DV |
563 | label.style.textAlign = "right"; |
564 | } else if (tick[0] == 1) { | |
565 | label.style.left = (this.area.x + this.area.w + | |
566 | this.options.axisTickSize) + "px"; | |
567 | label.style.textAlign = "left"; | |
568 | } | |
fbe31dc8 | 569 | label.style.width = this.options.yAxisLabelWidth + "px"; |
b0c3b730 | 570 | this.container.appendChild(label); |
fbe31dc8 | 571 | this.ylabels.push(label); |
2160ed4a | 572 | } |
fbe31dc8 DV |
573 | |
574 | // The lowest tick on the y-axis often overlaps with the leftmost | |
575 | // tick on the x-axis. Shift the bottom tick up a little bit to | |
576 | // compensate if necessary. | |
577 | var bottomTick = this.ylabels[0]; | |
578 | var fontSize = this.options.axisLabelFontSize; | |
579 | var bottom = parseInt(bottomTick.style.top) + fontSize; | |
580 | if (bottom > this.height - fontSize) { | |
581 | bottomTick.style.top = (parseInt(bottomTick.style.top) - | |
582 | fontSize / 2) + "px"; | |
583 | } | |
584 | } | |
585 | ||
528ce7e5 | 586 | // draw a vertical line on the left to separate the chart from the labels. |
fbe31dc8 | 587 | context.beginPath(); |
528ce7e5 DV |
588 | context.moveTo(halfUp(this.area.x), halfDown(this.area.y)); |
589 | context.lineTo(halfUp(this.area.x), halfDown(this.area.y + this.area.h)); | |
fbe31dc8 DV |
590 | context.closePath(); |
591 | context.stroke(); | |
c1dbeb10 | 592 | |
528ce7e5 | 593 | // if there's a secondary y-axis, draw a vertical line for that, too. |
c1dbeb10 DV |
594 | if (this.dygraph_.numAxes() == 2) { |
595 | context.beginPath(); | |
528ce7e5 DV |
596 | context.moveTo(halfDown(this.area.x + this.area.w), halfDown(this.area.y)); |
597 | context.lineTo(halfDown(this.area.x + this.area.w), halfDown(this.area.y + this.area.h)); | |
c1dbeb10 DV |
598 | context.closePath(); |
599 | context.stroke(); | |
600 | } | |
fbe31dc8 DV |
601 | } |
602 | ||
603 | if (this.options.drawXAxis) { | |
604 | if (this.layout.xticks) { | |
2160ed4a DV |
605 | for (var i = 0; i < this.layout.xticks.length; i++) { |
606 | var tick = this.layout.xticks[i]; | |
fbe31dc8 DV |
607 | if (typeof(dataset) == "function") return; |
608 | ||
609 | var x = this.area.x + tick[0] * this.area.w; | |
610 | var y = this.area.y + this.area.h; | |
611 | context.beginPath(); | |
528ce7e5 DV |
612 | context.moveTo(halfUp(x), halfDown(y)); |
613 | context.lineTo(halfUp(x), halfDown(y + this.options.axisTickSize)); | |
fbe31dc8 DV |
614 | context.closePath(); |
615 | context.stroke(); | |
616 | ||
34fedff8 | 617 | var label = makeDiv(tick[1]); |
fbe31dc8 | 618 | label.style.textAlign = "center"; |
ad1798c2 | 619 | label.style.top = (y + this.options.axisTickSize) + 'px'; |
fbe31dc8 DV |
620 | |
621 | var left = (x - this.options.axisLabelWidth/2); | |
622 | if (left + this.options.axisLabelWidth > this.width) { | |
623 | left = this.width - this.options.xAxisLabelWidth; | |
624 | label.style.textAlign = "right"; | |
625 | } | |
626 | if (left < 0) { | |
627 | left = 0; | |
628 | label.style.textAlign = "left"; | |
629 | } | |
630 | ||
631 | label.style.left = left + "px"; | |
632 | label.style.width = this.options.xAxisLabelWidth + "px"; | |
b0c3b730 | 633 | this.container.appendChild(label); |
fbe31dc8 | 634 | this.xlabels.push(label); |
2160ed4a | 635 | } |
fbe31dc8 DV |
636 | } |
637 | ||
638 | context.beginPath(); | |
528ce7e5 DV |
639 | context.moveTo(halfUp(this.area.x), halfDown(this.area.y + this.area.h)); |
640 | context.lineTo(halfUp(this.area.x + this.area.w), halfDown(this.area.y + this.area.h)); | |
fbe31dc8 DV |
641 | context.closePath(); |
642 | context.stroke(); | |
643 | } | |
644 | ||
645 | context.restore(); | |
6a1aa64f DV |
646 | }; |
647 | ||
fbe31dc8 | 648 | |
ad1798c2 DV |
649 | DygraphCanvasRenderer.prototype._renderChartLabels = function() { |
650 | // Generate divs for the chart title, xlabel and ylabel. | |
651 | // Space for these divs has already been taken away from the charting area in | |
652 | // the DygraphCanvasRenderer constructor. | |
653 | if (this.attr_('title')) { | |
654 | var div = document.createElement("div"); | |
655 | div.style.position = 'absolute'; | |
656 | div.style.top = '0px'; | |
657 | div.style.left = this.area.x + 'px'; | |
658 | div.style.width = this.area.w + 'px'; | |
659 | div.style.height = this.attr_('titleHeight') + 'px'; | |
660 | div.style.textAlign = 'center'; | |
b4202b3d | 661 | div.style.fontSize = (this.attr_('titleHeight') - 8) + 'px'; |
ad1798c2 | 662 | div.style.fontWeight = 'bold'; |
ca49434a DV |
663 | var class_div = document.createElement("div"); |
664 | class_div.className = 'dygraph-label dygraph-title'; | |
665 | class_div.innerHTML = this.attr_('title'); | |
666 | div.appendChild(class_div); | |
ad1798c2 DV |
667 | this.container.appendChild(div); |
668 | this.chartLabels.title = div; | |
669 | } | |
670 | ||
671 | if (this.attr_('xlabel')) { | |
672 | var div = document.createElement("div"); | |
673 | div.style.position = 'absolute'; | |
674 | div.style.bottom = 0; // TODO(danvk): this is lazy. Calculate style.top. | |
675 | div.style.left = this.area.x + 'px'; | |
676 | div.style.width = this.area.w + 'px'; | |
677 | div.style.height = this.attr_('xLabelHeight') + 'px'; | |
678 | div.style.textAlign = 'center'; | |
86cce9e8 | 679 | div.style.fontSize = (this.attr_('xLabelHeight') - 2) + 'px'; |
ca49434a DV |
680 | |
681 | var class_div = document.createElement("div"); | |
682 | class_div.className = 'dygraph-label dygraph-xlabel'; | |
683 | class_div.innerHTML = this.attr_('xlabel'); | |
684 | div.appendChild(class_div); | |
ad1798c2 DV |
685 | this.container.appendChild(div); |
686 | this.chartLabels.xlabel = div; | |
687 | } | |
688 | ||
689 | if (this.attr_('ylabel')) { | |
690 | var box = { | |
691 | left: 0, | |
692 | top: this.area.y, | |
693 | width: this.attr_('yLabelWidth'), | |
694 | height: this.area.h | |
695 | }; | |
ca49434a | 696 | // TODO(danvk): is this outer div actually necessary? |
ad1798c2 DV |
697 | var div = document.createElement("div"); |
698 | div.style.position = 'absolute'; | |
699 | div.style.left = box.left; | |
700 | div.style.top = box.top + 'px'; | |
701 | div.style.width = box.width + 'px'; | |
702 | div.style.height = box.height + 'px'; | |
86cce9e8 | 703 | div.style.fontSize = (this.attr_('yLabelWidth') - 2) + 'px'; |
ad1798c2 DV |
704 | |
705 | var inner_div = document.createElement("div"); | |
706 | inner_div.style.position = 'absolute'; | |
ad1798c2 DV |
707 | inner_div.style.width = box.height + 'px'; |
708 | inner_div.style.height = box.width + 'px'; | |
709 | inner_div.style.top = (box.height / 2 - box.width / 2) + 'px'; | |
710 | inner_div.style.left = (box.width / 2 - box.height / 2) + 'px'; | |
711 | inner_div.style.textAlign = 'center'; | |
b56b6993 DV |
712 | |
713 | // CSS rotation is an HTML5 feature which is not standardized. Hence every | |
714 | // browser has its own name for the CSS style. | |
ad1798c2 DV |
715 | inner_div.style.transform = 'rotate(-90deg)'; // HTML5 |
716 | inner_div.style.WebkitTransform = 'rotate(-90deg)'; // Safari/Chrome | |
717 | inner_div.style.MozTransform = 'rotate(-90deg)'; // Firefox | |
718 | inner_div.style.OTransform = 'rotate(-90deg)'; // Opera | |
52c47e80 | 719 | inner_div.style.msTransform = 'rotate(-90deg)'; // IE9 |
b56b6993 DV |
720 | |
721 | if (typeof(document.documentMode) !== 'undefined' && | |
722 | document.documentMode < 9) { | |
723 | // We're dealing w/ an old version of IE, so we have to rotate the text | |
724 | // using a BasicImage transform. This uses a different origin of rotation | |
725 | // than HTML5 rotation (top left of div vs. its center). | |
726 | inner_div.style.filter = | |
727 | 'progid:DXImageTransform.Microsoft.BasicImage(rotation=3)'; | |
728 | inner_div.style.left = '0px'; | |
729 | inner_div.style.top = '0px'; | |
730 | } | |
ad1798c2 | 731 | |
ca49434a DV |
732 | var class_div = document.createElement("div"); |
733 | class_div.className = 'dygraph-label dygraph-ylabel'; | |
734 | class_div.innerHTML = this.attr_('ylabel'); | |
735 | ||
736 | inner_div.appendChild(class_div); | |
ad1798c2 DV |
737 | div.appendChild(inner_div); |
738 | this.container.appendChild(div); | |
739 | this.chartLabels.ylabel = div; | |
740 | } | |
741 | }; | |
742 | ||
743 | ||
ce49c2fa DV |
744 | DygraphCanvasRenderer.prototype._renderAnnotations = function() { |
745 | var annotationStyle = { | |
746 | "position": "absolute", | |
747 | "fontSize": this.options.axisLabelFontSize + "px", | |
748 | "zIndex": 10, | |
3bf2fa91 | 749 | "overflow": "hidden" |
ce49c2fa DV |
750 | }; |
751 | ||
ab5e5c75 DV |
752 | var bindEvt = function(eventName, classEventName, p, self) { |
753 | return function(e) { | |
754 | var a = p.annotation; | |
755 | if (a.hasOwnProperty(eventName)) { | |
756 | a[eventName](a, p, self.dygraph_, e); | |
757 | } else if (self.dygraph_.attr_(classEventName)) { | |
758 | self.dygraph_.attr_(classEventName)(a, p, self.dygraph_,e ); | |
759 | } | |
760 | }; | |
761 | } | |
762 | ||
ce49c2fa DV |
763 | // Get a list of point with annotations. |
764 | var points = this.layout.annotated_points; | |
765 | for (var i = 0; i < points.length; i++) { | |
766 | var p = points[i]; | |
e6d53148 DV |
767 | if (p.canvasx < this.area.x || p.canvasx > this.area.x + this.area.w) { |
768 | continue; | |
769 | } | |
770 | ||
ce5e8d36 DV |
771 | var a = p.annotation; |
772 | var tick_height = 6; | |
773 | if (a.hasOwnProperty("tickHeight")) { | |
774 | tick_height = a.tickHeight; | |
9a40897e DV |
775 | } |
776 | ||
ce49c2fa DV |
777 | var div = document.createElement("div"); |
778 | for (var name in annotationStyle) { | |
779 | if (annotationStyle.hasOwnProperty(name)) { | |
780 | div.style[name] = annotationStyle[name]; | |
781 | } | |
782 | } | |
ce5e8d36 DV |
783 | if (!a.hasOwnProperty('icon')) { |
784 | div.className = "dygraphDefaultAnnotation"; | |
785 | } | |
786 | if (a.hasOwnProperty('cssClass')) { | |
787 | div.className += " " + a.cssClass; | |
788 | } | |
789 | ||
a5ad69cc DV |
790 | var width = a.hasOwnProperty('width') ? a.width : 16; |
791 | var height = a.hasOwnProperty('height') ? a.height : 16; | |
ce5e8d36 DV |
792 | if (a.hasOwnProperty('icon')) { |
793 | var img = document.createElement("img"); | |
794 | img.src = a.icon; | |
33030f33 DV |
795 | img.width = width; |
796 | img.height = height; | |
ce5e8d36 DV |
797 | div.appendChild(img); |
798 | } else if (p.annotation.hasOwnProperty('shortText')) { | |
799 | div.appendChild(document.createTextNode(p.annotation.shortText)); | |
5c528fa2 | 800 | } |
ce5e8d36 | 801 | div.style.left = (p.canvasx - width / 2) + "px"; |
d14b9eed DV |
802 | if (a.attachAtBottom) { |
803 | div.style.top = (this.area.h - height - tick_height) + "px"; | |
804 | } else { | |
805 | div.style.top = (p.canvasy - height - tick_height) + "px"; | |
806 | } | |
ce5e8d36 DV |
807 | div.style.width = width + "px"; |
808 | div.style.height = height + "px"; | |
ce49c2fa DV |
809 | div.title = p.annotation.text; |
810 | div.style.color = this.colors[p.name]; | |
811 | div.style.borderColor = this.colors[p.name]; | |
e6d53148 | 812 | a.div = div; |
ab5e5c75 | 813 | |
9a40897e DV |
814 | Dygraph.addEvent(div, 'click', |
815 | bindEvt('clickHandler', 'annotationClickHandler', p, this)); | |
816 | Dygraph.addEvent(div, 'mouseover', | |
817 | bindEvt('mouseOverHandler', 'annotationMouseOverHandler', p, this)); | |
818 | Dygraph.addEvent(div, 'mouseout', | |
819 | bindEvt('mouseOutHandler', 'annotationMouseOutHandler', p, this)); | |
820 | Dygraph.addEvent(div, 'dblclick', | |
821 | bindEvt('dblClickHandler', 'annotationDblClickHandler', p, this)); | |
ab5e5c75 | 822 | |
ce49c2fa DV |
823 | this.container.appendChild(div); |
824 | this.annotations.push(div); | |
9a40897e DV |
825 | |
826 | var ctx = this.element.getContext("2d"); | |
827 | ctx.strokeStyle = this.colors[p.name]; | |
828 | ctx.beginPath(); | |
d14b9eed DV |
829 | if (!a.attachAtBottom) { |
830 | ctx.moveTo(p.canvasx, p.canvasy); | |
831 | ctx.lineTo(p.canvasx, p.canvasy - 2 - tick_height); | |
832 | } else { | |
833 | ctx.moveTo(p.canvasx, this.area.h); | |
834 | ctx.lineTo(p.canvasx, this.area.h - 2 - tick_height); | |
835 | } | |
9a40897e DV |
836 | ctx.closePath(); |
837 | ctx.stroke(); | |
ce49c2fa DV |
838 | } |
839 | }; | |
840 | ||
841 | ||
6a1aa64f DV |
842 | /** |
843 | * Overrides the CanvasRenderer method to draw error bars | |
844 | */ | |
285a6bda | 845 | DygraphCanvasRenderer.prototype._renderLineChart = function() { |
44c6bc29 | 846 | // TODO(danvk): use this.attr_ for many of these. |
6a1aa64f DV |
847 | var context = this.element.getContext("2d"); |
848 | var colorCount = this.options.colorScheme.length; | |
849 | var colorScheme = this.options.colorScheme; | |
43af96e7 | 850 | var fillAlpha = this.options.fillAlpha; |
6a1aa64f | 851 | var errorBars = this.layout.options.errorBars; |
44c6bc29 | 852 | var fillGraph = this.attr_("fillGraph"); |
354e15ab | 853 | var stackedGraph = this.layout.options.stackedGraph; |
afdc483f | 854 | var stepPlot = this.layout.options.stepPlot; |
21d3323f DV |
855 | |
856 | var setNames = []; | |
ca43052c | 857 | for (var name in this.layout.datasets) { |
85b99f0b DV |
858 | if (this.layout.datasets.hasOwnProperty(name)) { |
859 | setNames.push(name); | |
860 | } | |
ca43052c | 861 | } |
21d3323f | 862 | var setCount = setNames.length; |
6a1aa64f | 863 | |
f032c51d AV |
864 | this.colors = {} |
865 | for (var i = 0; i < setCount; i++) { | |
866 | this.colors[setNames[i]] = colorScheme[i % colorCount]; | |
867 | } | |
868 | ||
ff00d3e2 DV |
869 | // Update Points |
870 | // TODO(danvk): here | |
2160ed4a DV |
871 | for (var i = 0; i < this.layout.points.length; i++) { |
872 | var point = this.layout.points[i]; | |
6a1aa64f DV |
873 | point.canvasx = this.area.w * point.x + this.area.x; |
874 | point.canvasy = this.area.h * point.y + this.area.y; | |
875 | } | |
6a1aa64f DV |
876 | |
877 | // create paths | |
80aaae18 DV |
878 | var ctx = context; |
879 | if (errorBars) { | |
6a834bbb DV |
880 | if (fillGraph) { |
881 | this.dygraph_.warn("Can't use fillGraph option with error bars"); | |
882 | } | |
883 | ||
6a1aa64f DV |
884 | for (var i = 0; i < setCount; i++) { |
885 | var setName = setNames[i]; | |
ea4942ed DV |
886 | var axis = this.layout.options.yAxes[ |
887 | this.layout.options.seriesToAxisMap[setName]]; | |
f032c51d | 888 | var color = this.colors[setName]; |
6a1aa64f DV |
889 | |
890 | // setup graphics context | |
80aaae18 | 891 | ctx.save(); |
56623f3b | 892 | var prevX = NaN; |
afdc483f | 893 | var prevY = NaN; |
6a1aa64f | 894 | var prevYs = [-1, -1]; |
ea4942ed | 895 | var yscale = axis.yscale; |
f474c2a3 DV |
896 | // should be same color as the lines but only 15% opaque. |
897 | var rgb = new RGBColor(color); | |
43af96e7 NK |
898 | var err_color = 'rgba(' + rgb.r + ',' + rgb.g + ',' + rgb.b + ',' + |
899 | fillAlpha + ')'; | |
f474c2a3 | 900 | ctx.fillStyle = err_color; |
05c9d0c4 DV |
901 | ctx.beginPath(); |
902 | for (var j = 0; j < this.layout.points.length; j++) { | |
903 | var point = this.layout.points[j]; | |
6a1aa64f | 904 | if (point.name == setName) { |
e9fe4a2f | 905 | if (!Dygraph.isOK(point.y)) { |
56623f3b | 906 | prevX = NaN; |
ae85914a | 907 | continue; |
5011e7a1 | 908 | } |
ce49c2fa | 909 | |
3637724f | 910 | // TODO(danvk): here |
afdc483f NN |
911 | if (stepPlot) { |
912 | var newYs = [ prevY - point.errorPlus * yscale, | |
47600757 | 913 | prevY + point.errorMinus * yscale ]; |
afdc483f NN |
914 | prevY = point.y; |
915 | } else { | |
916 | var newYs = [ point.y - point.errorPlus * yscale, | |
47600757 | 917 | point.y + point.errorMinus * yscale ]; |
afdc483f | 918 | } |
6a1aa64f DV |
919 | newYs[0] = this.area.h * newYs[0] + this.area.y; |
920 | newYs[1] = this.area.h * newYs[1] + this.area.y; | |
56623f3b | 921 | if (!isNaN(prevX)) { |
afdc483f | 922 | if (stepPlot) { |
47600757 | 923 | ctx.moveTo(prevX, newYs[0]); |
afdc483f | 924 | } else { |
47600757 | 925 | ctx.moveTo(prevX, prevYs[0]); |
afdc483f | 926 | } |
5954ef32 DV |
927 | ctx.lineTo(point.canvasx, newYs[0]); |
928 | ctx.lineTo(point.canvasx, newYs[1]); | |
afdc483f | 929 | if (stepPlot) { |
47600757 | 930 | ctx.lineTo(prevX, newYs[1]); |
afdc483f | 931 | } else { |
47600757 | 932 | ctx.lineTo(prevX, prevYs[1]); |
afdc483f | 933 | } |
5954ef32 DV |
934 | ctx.closePath(); |
935 | } | |
354e15ab | 936 | prevYs = newYs; |
5954ef32 DV |
937 | prevX = point.canvasx; |
938 | } | |
939 | } | |
940 | ctx.fill(); | |
941 | } | |
942 | } else if (fillGraph) { | |
354e15ab DE |
943 | var baseline = [] // for stacked graphs: baseline for filling |
944 | ||
945 | // process sets in reverse order (needed for stacked graphs) | |
946 | for (var i = setCount - 1; i >= 0; i--) { | |
5954ef32 | 947 | var setName = setNames[i]; |
f032c51d | 948 | var color = this.colors[setName]; |
ea4942ed DV |
949 | var axis = this.layout.options.yAxes[ |
950 | this.layout.options.seriesToAxisMap[setName]]; | |
951 | var axisY = 1.0 + axis.minyval * axis.yscale; | |
952 | if (axisY < 0.0) axisY = 0.0; | |
953 | else if (axisY > 1.0) axisY = 1.0; | |
954 | axisY = this.area.h * axisY + this.area.y; | |
5954ef32 DV |
955 | |
956 | // setup graphics context | |
957 | ctx.save(); | |
56623f3b | 958 | var prevX = NaN; |
5954ef32 | 959 | var prevYs = [-1, -1]; |
ea4942ed | 960 | var yscale = axis.yscale; |
5954ef32 DV |
961 | // should be same color as the lines but only 15% opaque. |
962 | var rgb = new RGBColor(color); | |
43af96e7 NK |
963 | var err_color = 'rgba(' + rgb.r + ',' + rgb.g + ',' + rgb.b + ',' + |
964 | fillAlpha + ')'; | |
5954ef32 DV |
965 | ctx.fillStyle = err_color; |
966 | ctx.beginPath(); | |
967 | for (var j = 0; j < this.layout.points.length; j++) { | |
968 | var point = this.layout.points[j]; | |
5954ef32 | 969 | if (point.name == setName) { |
e9fe4a2f | 970 | if (!Dygraph.isOK(point.y)) { |
56623f3b | 971 | prevX = NaN; |
5954ef32 DV |
972 | continue; |
973 | } | |
354e15ab DE |
974 | var newYs; |
975 | if (stackedGraph) { | |
976 | lastY = baseline[point.canvasx]; | |
977 | if (lastY === undefined) lastY = axisY; | |
978 | baseline[point.canvasx] = point.canvasy; | |
979 | newYs = [ point.canvasy, lastY ]; | |
980 | } else { | |
981 | newYs = [ point.canvasy, axisY ]; | |
982 | } | |
56623f3b | 983 | if (!isNaN(prevX)) { |
05c9d0c4 | 984 | ctx.moveTo(prevX, prevYs[0]); |
afdc483f | 985 | if (stepPlot) { |
47600757 | 986 | ctx.lineTo(point.canvasx, prevYs[0]); |
afdc483f | 987 | } else { |
47600757 | 988 | ctx.lineTo(point.canvasx, newYs[0]); |
afdc483f | 989 | } |
05c9d0c4 DV |
990 | ctx.lineTo(point.canvasx, newYs[1]); |
991 | ctx.lineTo(prevX, prevYs[1]); | |
992 | ctx.closePath(); | |
6a1aa64f | 993 | } |
354e15ab | 994 | prevYs = newYs; |
6a1aa64f DV |
995 | prevX = point.canvasx; |
996 | } | |
05c9d0c4 | 997 | } |
6a1aa64f DV |
998 | ctx.fill(); |
999 | } | |
80aaae18 DV |
1000 | } |
1001 | ||
1002 | for (var i = 0; i < setCount; i++) { | |
1003 | var setName = setNames[i]; | |
f032c51d | 1004 | var color = this.colors[setName]; |
227b93cc | 1005 | var strokeWidth = this.dygraph_.attr_("strokeWidth", setName); |
80aaae18 DV |
1006 | |
1007 | // setup graphics context | |
1008 | context.save(); | |
1009 | var point = this.layout.points[0]; | |
227b93cc | 1010 | var pointSize = this.dygraph_.attr_("pointSize", setName); |
80aaae18 | 1011 | var prevX = null, prevY = null; |
227b93cc | 1012 | var drawPoints = this.dygraph_.attr_("drawPoints", setName); |
80aaae18 DV |
1013 | var points = this.layout.points; |
1014 | for (var j = 0; j < points.length; j++) { | |
1015 | var point = points[j]; | |
1016 | if (point.name == setName) { | |
e9fe4a2f | 1017 | if (!Dygraph.isOK(point.canvasy)) { |
5d13ef68 | 1018 | if (stepPlot && prevX != null) { |
0599d13b NN |
1019 | // Draw a horizontal line to the start of the missing data |
1020 | ctx.beginPath(); | |
1021 | ctx.strokeStyle = color; | |
1022 | ctx.lineWidth = this.options.strokeWidth; | |
1023 | ctx.moveTo(prevX, prevY); | |
1024 | ctx.lineTo(point.canvasx, prevY); | |
1025 | ctx.stroke(); | |
1026 | } | |
80aaae18 DV |
1027 | // this will make us move to the next point, not draw a line to it. |
1028 | prevX = prevY = null; | |
1029 | } else { | |
1030 | // A point is "isolated" if it is non-null but both the previous | |
1031 | // and next points are null. | |
1032 | var isIsolated = (!prevX && (j == points.length - 1 || | |
e9fe4a2f | 1033 | !Dygraph.isOK(points[j+1].canvasy))); |
80aaae18 DV |
1034 | |
1035 | if (!prevX) { | |
1036 | prevX = point.canvasx; | |
1037 | prevY = point.canvasy; | |
1038 | } else { | |
46dde5f9 DV |
1039 | // TODO(danvk): figure out why this conditional is necessary. |
1040 | if (strokeWidth) { | |
1041 | ctx.beginPath(); | |
1042 | ctx.strokeStyle = color; | |
1043 | ctx.lineWidth = strokeWidth; | |
1044 | ctx.moveTo(prevX, prevY); | |
1045 | if (stepPlot) { | |
1046 | ctx.lineTo(point.canvasx, prevY); | |
1047 | } | |
1048 | prevX = point.canvasx; | |
1049 | prevY = point.canvasy; | |
1050 | ctx.lineTo(prevX, prevY); | |
1051 | ctx.stroke(); | |
afdc483f | 1052 | } |
80aaae18 DV |
1053 | } |
1054 | ||
1055 | if (drawPoints || isIsolated) { | |
1056 | ctx.beginPath(); | |
1057 | ctx.fillStyle = color; | |
7bf6a9fe DV |
1058 | ctx.arc(point.canvasx, point.canvasy, pointSize, |
1059 | 0, 2 * Math.PI, false); | |
80aaae18 DV |
1060 | ctx.fill(); |
1061 | } | |
1062 | } | |
1063 | } | |
1064 | } | |
1065 | } | |
6a1aa64f | 1066 | |
6a1aa64f DV |
1067 | context.restore(); |
1068 | }; |