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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: | |
7 | * - grid overlays | |
8 | * - error bars | |
9 | * - dygraphs attribute system | |
6a1aa64f DV |
10 | */ |
11 | ||
6a1aa64f | 12 | /** |
3df0ccf0 | 13 | * Creates a new DygraphLayout object. |
6a1aa64f | 14 | * @param {Object} options Options for PlotKit.Layout |
285a6bda | 15 | * @return {Object} The DygraphLayout object |
6a1aa64f | 16 | */ |
efe0829a DV |
17 | DygraphLayout = function(dygraph, options) { |
18 | this.dygraph_ = dygraph; | |
19 | this.options = {}; // TODO(danvk): remove, use attr_ instead. | |
fc80a396 | 20 | Dygraph.update(this.options, options ? options : {}); |
efe0829a | 21 | this.datasets = new Array(); |
5c528fa2 | 22 | this.annotations = new Array() |
6a1aa64f | 23 | }; |
efe0829a DV |
24 | |
25 | DygraphLayout.prototype.attr_ = function(name) { | |
26 | return this.dygraph_.attr_(name); | |
27 | }; | |
28 | ||
29 | DygraphLayout.prototype.addDataset = function(setname, set_xy) { | |
30 | this.datasets[setname] = set_xy; | |
31 | }; | |
32 | ||
5c528fa2 DV |
33 | DygraphLayout.prototype.setAnnotations = function(ann) { |
34 | // The Dygraph object's annotations aren't parsed. We parse them here and | |
35 | // save a copy. | |
36 | var parse = this.attr_('xValueParser'); | |
37 | for (var i = 0; i < ann.length; i++) { | |
38 | var a = {}; | |
a685723c | 39 | if (!ann[i].xval && !ann[i].x) { |
5c528fa2 DV |
40 | this.dygraph_.error("Annotations must have an 'x' property"); |
41 | return; | |
42 | } | |
ce5e8d36 | 43 | if (ann[i].icon && |
33030f33 DV |
44 | !(ann[i].hasOwnProperty('width') && |
45 | ann[i].hasOwnProperty('height'))) { | |
46 | this.dygraph_.error("Must set width and height when setting " + | |
ce5e8d36 DV |
47 | "annotation.icon property"); |
48 | return; | |
49 | } | |
5c528fa2 | 50 | Dygraph.update(a, ann[i]); |
a685723c | 51 | if (!a.xval) a.xval = parse(a.x); |
5c528fa2 | 52 | this.annotations.push(a); |
ce49c2fa | 53 | } |
ce49c2fa DV |
54 | }; |
55 | ||
efe0829a DV |
56 | DygraphLayout.prototype.evaluate = function() { |
57 | this._evaluateLimits(); | |
58 | this._evaluateLineCharts(); | |
59 | this._evaluateLineTicks(); | |
ce49c2fa | 60 | this._evaluateAnnotations(); |
efe0829a DV |
61 | }; |
62 | ||
63 | DygraphLayout.prototype._evaluateLimits = function() { | |
64 | this.minxval = this.maxxval = null; | |
f6401bf6 DV |
65 | if (this.options.dateWindow) { |
66 | this.minxval = this.options.dateWindow[0]; | |
67 | this.maxxval = this.options.dateWindow[1]; | |
68 | } else { | |
69 | for (var name in this.datasets) { | |
70 | if (!this.datasets.hasOwnProperty(name)) continue; | |
71 | var series = this.datasets[name]; | |
48841144 NN |
72 | if (series.length > 1) { |
73 | var x1 = series[0][0]; | |
74 | if (!this.minxval || x1 < this.minxval) this.minxval = x1; | |
75 | ||
76 | var x2 = series[series.length - 1][0]; | |
77 | if (!this.maxxval || x2 > this.maxxval) this.maxxval = x2; | |
78 | } | |
f6401bf6 | 79 | } |
efe0829a DV |
80 | } |
81 | this.xrange = this.maxxval - this.minxval; | |
82 | this.xscale = (this.xrange != 0 ? 1/this.xrange : 1.0); | |
83 | ||
84 | this.minyval = this.options.yAxis[0]; | |
85 | this.maxyval = this.options.yAxis[1]; | |
86 | this.yrange = this.maxyval - this.minyval; | |
87 | this.yscale = (this.yrange != 0 ? 1/this.yrange : 1.0); | |
88 | }; | |
89 | ||
90 | DygraphLayout.prototype._evaluateLineCharts = function() { | |
91 | // add all the rects | |
92 | this.points = new Array(); | |
93 | for (var setName in this.datasets) { | |
85b99f0b DV |
94 | if (!this.datasets.hasOwnProperty(setName)) continue; |
95 | ||
96 | var dataset = this.datasets[setName]; | |
97 | for (var j = 0; j < dataset.length; j++) { | |
98 | var item = dataset[j]; | |
99 | var point = { | |
ff00d3e2 | 100 | // TODO(danvk): here |
85b99f0b DV |
101 | x: ((parseFloat(item[0]) - this.minxval) * this.xscale), |
102 | y: 1.0 - ((parseFloat(item[1]) - this.minyval) * this.yscale), | |
103 | xval: parseFloat(item[0]), | |
104 | yval: parseFloat(item[1]), | |
105 | name: setName | |
106 | }; | |
107 | ||
108 | // limit the x, y values so they do not overdraw | |
109 | if (point.y <= 0.0) { | |
110 | point.y = 0.0; | |
111 | } | |
112 | if (point.y >= 1.0) { | |
113 | point.y = 1.0; | |
114 | } | |
1a26f3fb | 115 | this.points.push(point); |
85b99f0b | 116 | } |
efe0829a DV |
117 | } |
118 | }; | |
119 | ||
120 | DygraphLayout.prototype._evaluateLineTicks = function() { | |
121 | this.xticks = new Array(); | |
122 | for (var i = 0; i < this.options.xTicks.length; i++) { | |
123 | var tick = this.options.xTicks[i]; | |
124 | var label = tick.label; | |
125 | var pos = this.xscale * (tick.v - this.minxval); | |
126 | if ((pos >= 0.0) && (pos <= 1.0)) { | |
127 | this.xticks.push([pos, label]); | |
128 | } | |
129 | } | |
130 | ||
131 | this.yticks = new Array(); | |
132 | for (var i = 0; i < this.options.yTicks.length; i++) { | |
133 | var tick = this.options.yTicks[i]; | |
134 | var label = tick.label; | |
135 | var pos = 1.0 - (this.yscale * (tick.v - this.minyval)); | |
136 | if ((pos >= 0.0) && (pos <= 1.0)) { | |
137 | this.yticks.push([pos, label]); | |
138 | } | |
139 | } | |
140 | }; | |
141 | ||
6a1aa64f DV |
142 | |
143 | /** | |
144 | * Behaves the same way as PlotKit.Layout, but also copies the errors | |
145 | * @private | |
146 | */ | |
285a6bda | 147 | DygraphLayout.prototype.evaluateWithError = function() { |
6a1aa64f DV |
148 | this.evaluate(); |
149 | if (!this.options.errorBars) return; | |
150 | ||
151 | // Copy over the error terms | |
152 | var i = 0; // index in this.points | |
153 | for (var setName in this.datasets) { | |
85b99f0b DV |
154 | if (!this.datasets.hasOwnProperty(setName)) continue; |
155 | var j = 0; | |
156 | var dataset = this.datasets[setName]; | |
157 | for (var j = 0; j < dataset.length; j++, i++) { | |
158 | var item = dataset[j]; | |
159 | var xv = parseFloat(item[0]); | |
160 | var yv = parseFloat(item[1]); | |
161 | ||
162 | if (xv == this.points[i].xval && | |
163 | yv == this.points[i].yval) { | |
164 | this.points[i].errorMinus = parseFloat(item[2]); | |
165 | this.points[i].errorPlus = parseFloat(item[3]); | |
166 | } | |
167 | } | |
6a1aa64f DV |
168 | } |
169 | }; | |
170 | ||
ce49c2fa DV |
171 | DygraphLayout.prototype._evaluateAnnotations = function() { |
172 | // Add the annotations to the point to which they belong. | |
173 | // Make a map from (setName, xval) to annotation for quick lookups. | |
174 | var annotations = {}; | |
175 | for (var i = 0; i < this.annotations.length; i++) { | |
176 | var a = this.annotations[i]; | |
177 | annotations[a.xval + "," + a.series] = a; | |
178 | } | |
179 | ||
180 | this.annotated_points = []; | |
181 | for (var i = 0; i < this.points.length; i++) { | |
182 | var p = this.points[i]; | |
183 | var k = p.xval + "," + p.name; | |
184 | if (k in annotations) { | |
185 | p.annotation = annotations[k]; | |
186 | this.annotated_points.push(p); | |
187 | } | |
188 | } | |
189 | }; | |
190 | ||
6a1aa64f DV |
191 | /** |
192 | * Convenience function to remove all the data sets from a graph | |
193 | */ | |
285a6bda | 194 | DygraphLayout.prototype.removeAllDatasets = function() { |
6a1aa64f DV |
195 | delete this.datasets; |
196 | this.datasets = new Array(); | |
197 | }; | |
198 | ||
199 | /** | |
200 | * Change the values of various layout options | |
201 | * @param {Object} new_options an associative array of new properties | |
202 | */ | |
285a6bda | 203 | DygraphLayout.prototype.updateOptions = function(new_options) { |
fc80a396 | 204 | Dygraph.update(this.options, new_options ? new_options : {}); |
6a1aa64f DV |
205 | }; |
206 | ||
667d510b | 207 | /** |
208 | * Return a copy of the point at the indicated index, with its yval unstacked. | |
209 | * @param int index of point in layout_.points | |
210 | */ | |
8c03ba63 | 211 | DygraphLayout.prototype.unstackPointAtIndex = function(idx) { |
667d510b | 212 | var point = this.points[idx]; |
213 | ||
214 | // Clone the point since we modify it | |
215 | var unstackedPoint = {}; | |
216 | for (var i in point) { | |
217 | unstackedPoint[i] = point[i]; | |
218 | } | |
219 | ||
220 | if (!this.attr_("stackedGraph")) { | |
221 | return unstackedPoint; | |
222 | } | |
223 | ||
224 | // The unstacked yval is equal to the current yval minus the yval of the | |
225 | // next point at the same xval. | |
226 | for (var i = idx+1; i < this.points.length; i++) { | |
227 | if (this.points[i].xval == point.xval) { | |
228 | unstackedPoint.yval -= this.points[i].yval; | |
229 | break; | |
230 | } | |
231 | } | |
232 | ||
233 | return unstackedPoint; | |
234 | } | |
235 | ||
6a1aa64f DV |
236 | // Subclass PlotKit.CanvasRenderer to add: |
237 | // 1. X/Y grid overlay | |
238 | // 2. Ability to draw error bars (if required) | |
239 | ||
240 | /** | |
241 | * Sets some PlotKit.CanvasRenderer options | |
242 | * @param {Object} element The canvas to attach to | |
285a6bda | 243 | * @param {Layout} layout The DygraphLayout object for this graph. |
6a1aa64f DV |
244 | * @param {Object} options Options to pass on to CanvasRenderer |
245 | */ | |
9317362d DV |
246 | DygraphCanvasRenderer = function(dygraph, element, layout, options) { |
247 | // TODO(danvk): remove options, just use dygraph.attr_. | |
9317362d | 248 | this.dygraph_ = dygraph; |
fbe31dc8 DV |
249 | |
250 | // default options | |
251 | this.options = { | |
f474c2a3 DV |
252 | "strokeWidth": 0.5, |
253 | "drawXAxis": true, | |
254 | "drawYAxis": true, | |
255 | "axisLineColor": "black", | |
256 | "axisLineWidth": 0.5, | |
257 | "axisTickSize": 3, | |
258 | "axisLabelColor": "black", | |
259 | "axisLabelFont": "Arial", | |
260 | "axisLabelFontSize": 9, | |
261 | "axisLabelWidth": 50, | |
262 | "drawYGrid": true, | |
263 | "drawXGrid": true, | |
43af96e7 | 264 | "gridLineColor": "rgb(128,128,128)", |
e7746234 EC |
265 | "fillAlpha": 0.15, |
266 | "underlayCallback": null | |
fbe31dc8 | 267 | }; |
fc80a396 | 268 | Dygraph.update(this.options, options); |
6a1aa64f | 269 | |
fbe31dc8 | 270 | this.layout = layout; |
b0c3b730 | 271 | this.element = element; |
fbe31dc8 DV |
272 | this.container = this.element.parentNode; |
273 | ||
fbe31dc8 DV |
274 | this.height = this.element.height; |
275 | this.width = this.element.width; | |
276 | ||
277 | // --- check whether everything is ok before we return | |
278 | if (!this.isIE && !(DygraphCanvasRenderer.isSupported(this.element))) | |
279 | throw "Canvas is not supported."; | |
280 | ||
281 | // internal state | |
282 | this.xlabels = new Array(); | |
283 | this.ylabels = new Array(); | |
ce49c2fa | 284 | this.annotations = new Array(); |
fbe31dc8 DV |
285 | |
286 | this.area = { | |
287 | x: this.options.yAxisLabelWidth + 2 * this.options.axisTickSize, | |
288 | y: 0 | |
289 | }; | |
290 | this.area.w = this.width - this.area.x - this.options.rightGap; | |
291 | this.area.h = this.height - this.options.axisLabelFontSize - | |
292 | 2 * this.options.axisTickSize; | |
293 | ||
b0c3b730 DV |
294 | this.container.style.position = "relative"; |
295 | this.container.style.width = this.width + "px"; | |
fbe31dc8 DV |
296 | }; |
297 | ||
298 | DygraphCanvasRenderer.prototype.clear = function() { | |
299 | if (this.isIE) { | |
300 | // VML takes a while to start up, so we just poll every this.IEDelay | |
301 | try { | |
302 | if (this.clearDelay) { | |
303 | this.clearDelay.cancel(); | |
304 | this.clearDelay = null; | |
305 | } | |
306 | var context = this.element.getContext("2d"); | |
307 | } | |
308 | catch (e) { | |
76171648 | 309 | // TODO(danvk): this is broken, since MochiKit.Async is gone. |
fbe31dc8 DV |
310 | this.clearDelay = MochiKit.Async.wait(this.IEDelay); |
311 | this.clearDelay.addCallback(bind(this.clear, this)); | |
312 | return; | |
313 | } | |
314 | } | |
315 | ||
316 | var context = this.element.getContext("2d"); | |
317 | context.clearRect(0, 0, this.width, this.height); | |
318 | ||
2160ed4a | 319 | for (var i = 0; i < this.xlabels.length; i++) { |
b0c3b730 DV |
320 | var el = this.xlabels[i]; |
321 | el.parentNode.removeChild(el); | |
2160ed4a DV |
322 | } |
323 | for (var i = 0; i < this.ylabels.length; i++) { | |
b0c3b730 DV |
324 | var el = this.ylabels[i]; |
325 | el.parentNode.removeChild(el); | |
2160ed4a | 326 | } |
ce49c2fa DV |
327 | for (var i = 0; i < this.annotations.length; i++) { |
328 | var el = this.annotations[i]; | |
329 | el.parentNode.removeChild(el); | |
330 | } | |
fbe31dc8 DV |
331 | this.xlabels = new Array(); |
332 | this.ylabels = new Array(); | |
ce49c2fa | 333 | this.annotations = new Array(); |
fbe31dc8 DV |
334 | }; |
335 | ||
336 | ||
337 | DygraphCanvasRenderer.isSupported = function(canvasName) { | |
338 | var canvas = null; | |
339 | try { | |
21d3323f | 340 | if (typeof(canvasName) == 'undefined' || canvasName == null) |
b0c3b730 | 341 | canvas = document.createElement("canvas"); |
fbe31dc8 | 342 | else |
b0c3b730 | 343 | canvas = canvasName; |
fbe31dc8 DV |
344 | var context = canvas.getContext("2d"); |
345 | } | |
346 | catch (e) { | |
347 | var ie = navigator.appVersion.match(/MSIE (\d\.\d)/); | |
348 | var opera = (navigator.userAgent.toLowerCase().indexOf("opera") != -1); | |
349 | if ((!ie) || (ie[1] < 6) || (opera)) | |
350 | return false; | |
351 | return true; | |
352 | } | |
353 | return true; | |
6a1aa64f | 354 | }; |
6a1aa64f DV |
355 | |
356 | /** | |
357 | * Draw an X/Y grid on top of the existing plot | |
358 | */ | |
285a6bda | 359 | DygraphCanvasRenderer.prototype.render = function() { |
6a1aa64f DV |
360 | // Draw the new X/Y grid |
361 | var ctx = this.element.getContext("2d"); | |
e7746234 EC |
362 | |
363 | if (this.options.underlayCallback) { | |
d9e6fa47 | 364 | this.options.underlayCallback(ctx, this.area, this.layout, this.dygraph_); |
e7746234 EC |
365 | } |
366 | ||
6a1aa64f DV |
367 | if (this.options.drawYGrid) { |
368 | var ticks = this.layout.yticks; | |
369 | ctx.save(); | |
f2f24402 | 370 | ctx.strokeStyle = this.options.gridLineColor; |
6a1aa64f DV |
371 | ctx.lineWidth = this.options.axisLineWidth; |
372 | for (var i = 0; i < ticks.length; i++) { | |
373 | var x = this.area.x; | |
374 | var y = this.area.y + ticks[i][0] * this.area.h; | |
375 | ctx.beginPath(); | |
376 | ctx.moveTo(x, y); | |
377 | ctx.lineTo(x + this.area.w, y); | |
378 | ctx.closePath(); | |
379 | ctx.stroke(); | |
380 | } | |
381 | } | |
382 | ||
383 | if (this.options.drawXGrid) { | |
384 | var ticks = this.layout.xticks; | |
385 | ctx.save(); | |
f2f24402 | 386 | ctx.strokeStyle = this.options.gridLineColor; |
6a1aa64f DV |
387 | ctx.lineWidth = this.options.axisLineWidth; |
388 | for (var i=0; i<ticks.length; i++) { | |
389 | var x = this.area.x + ticks[i][0] * this.area.w; | |
390 | var y = this.area.y + this.area.h; | |
391 | ctx.beginPath(); | |
392 | ctx.moveTo(x, y); | |
393 | ctx.lineTo(x, this.area.y); | |
394 | ctx.closePath(); | |
395 | ctx.stroke(); | |
396 | } | |
397 | } | |
2ce09b19 DV |
398 | |
399 | // Do the ordinary rendering, as before | |
2ce09b19 | 400 | this._renderLineChart(); |
fbe31dc8 | 401 | this._renderAxis(); |
ce49c2fa | 402 | this._renderAnnotations(); |
fbe31dc8 DV |
403 | }; |
404 | ||
405 | ||
406 | DygraphCanvasRenderer.prototype._renderAxis = function() { | |
407 | if (!this.options.drawXAxis && !this.options.drawYAxis) | |
408 | return; | |
409 | ||
410 | var context = this.element.getContext("2d"); | |
411 | ||
34fedff8 DV |
412 | var labelStyle = { |
413 | "position": "absolute", | |
414 | "fontSize": this.options.axisLabelFontSize + "px", | |
415 | "zIndex": 10, | |
f474c2a3 | 416 | "color": this.options.axisLabelColor, |
34fedff8 DV |
417 | "width": this.options.axisLabelWidth + "px", |
418 | "overflow": "hidden" | |
419 | }; | |
420 | var makeDiv = function(txt) { | |
421 | var div = document.createElement("div"); | |
422 | for (var name in labelStyle) { | |
85b99f0b DV |
423 | if (labelStyle.hasOwnProperty(name)) { |
424 | div.style[name] = labelStyle[name]; | |
425 | } | |
fbe31dc8 | 426 | } |
34fedff8 DV |
427 | div.appendChild(document.createTextNode(txt)); |
428 | return div; | |
fbe31dc8 DV |
429 | }; |
430 | ||
431 | // axis lines | |
432 | context.save(); | |
f474c2a3 | 433 | context.strokeStyle = this.options.axisLineColor; |
fbe31dc8 DV |
434 | context.lineWidth = this.options.axisLineWidth; |
435 | ||
fbe31dc8 | 436 | if (this.options.drawYAxis) { |
8b7a0cc3 | 437 | if (this.layout.yticks && this.layout.yticks.length > 0) { |
2160ed4a DV |
438 | for (var i = 0; i < this.layout.yticks.length; i++) { |
439 | var tick = this.layout.yticks[i]; | |
fbe31dc8 DV |
440 | if (typeof(tick) == "function") return; |
441 | var x = this.area.x; | |
442 | var y = this.area.y + tick[0] * this.area.h; | |
443 | context.beginPath(); | |
444 | context.moveTo(x, y); | |
445 | context.lineTo(x - this.options.axisTickSize, y); | |
446 | context.closePath(); | |
447 | context.stroke(); | |
448 | ||
34fedff8 | 449 | var label = makeDiv(tick[1]); |
fbe31dc8 DV |
450 | var top = (y - this.options.axisLabelFontSize / 2); |
451 | if (top < 0) top = 0; | |
452 | ||
453 | if (top + this.options.axisLabelFontSize + 3 > this.height) { | |
454 | label.style.bottom = "0px"; | |
455 | } else { | |
456 | label.style.top = top + "px"; | |
457 | } | |
458 | label.style.left = "0px"; | |
459 | label.style.textAlign = "right"; | |
460 | label.style.width = this.options.yAxisLabelWidth + "px"; | |
b0c3b730 | 461 | this.container.appendChild(label); |
fbe31dc8 | 462 | this.ylabels.push(label); |
2160ed4a | 463 | } |
fbe31dc8 DV |
464 | |
465 | // The lowest tick on the y-axis often overlaps with the leftmost | |
466 | // tick on the x-axis. Shift the bottom tick up a little bit to | |
467 | // compensate if necessary. | |
468 | var bottomTick = this.ylabels[0]; | |
469 | var fontSize = this.options.axisLabelFontSize; | |
470 | var bottom = parseInt(bottomTick.style.top) + fontSize; | |
471 | if (bottom > this.height - fontSize) { | |
472 | bottomTick.style.top = (parseInt(bottomTick.style.top) - | |
473 | fontSize / 2) + "px"; | |
474 | } | |
475 | } | |
476 | ||
477 | context.beginPath(); | |
478 | context.moveTo(this.area.x, this.area.y); | |
479 | context.lineTo(this.area.x, this.area.y + this.area.h); | |
480 | context.closePath(); | |
481 | context.stroke(); | |
482 | } | |
483 | ||
484 | if (this.options.drawXAxis) { | |
485 | if (this.layout.xticks) { | |
2160ed4a DV |
486 | for (var i = 0; i < this.layout.xticks.length; i++) { |
487 | var tick = this.layout.xticks[i]; | |
fbe31dc8 DV |
488 | if (typeof(dataset) == "function") return; |
489 | ||
490 | var x = this.area.x + tick[0] * this.area.w; | |
491 | var y = this.area.y + this.area.h; | |
492 | context.beginPath(); | |
493 | context.moveTo(x, y); | |
494 | context.lineTo(x, y + this.options.axisTickSize); | |
495 | context.closePath(); | |
496 | context.stroke(); | |
497 | ||
34fedff8 | 498 | var label = makeDiv(tick[1]); |
fbe31dc8 DV |
499 | label.style.textAlign = "center"; |
500 | label.style.bottom = "0px"; | |
501 | ||
502 | var left = (x - this.options.axisLabelWidth/2); | |
503 | if (left + this.options.axisLabelWidth > this.width) { | |
504 | left = this.width - this.options.xAxisLabelWidth; | |
505 | label.style.textAlign = "right"; | |
506 | } | |
507 | if (left < 0) { | |
508 | left = 0; | |
509 | label.style.textAlign = "left"; | |
510 | } | |
511 | ||
512 | label.style.left = left + "px"; | |
513 | label.style.width = this.options.xAxisLabelWidth + "px"; | |
b0c3b730 | 514 | this.container.appendChild(label); |
fbe31dc8 | 515 | this.xlabels.push(label); |
2160ed4a | 516 | } |
fbe31dc8 DV |
517 | } |
518 | ||
519 | context.beginPath(); | |
520 | context.moveTo(this.area.x, this.area.y + this.area.h); | |
521 | context.lineTo(this.area.x + this.area.w, this.area.y + this.area.h); | |
522 | context.closePath(); | |
523 | context.stroke(); | |
524 | } | |
525 | ||
526 | context.restore(); | |
6a1aa64f DV |
527 | }; |
528 | ||
fbe31dc8 | 529 | |
ce49c2fa DV |
530 | DygraphCanvasRenderer.prototype._renderAnnotations = function() { |
531 | var annotationStyle = { | |
532 | "position": "absolute", | |
533 | "fontSize": this.options.axisLabelFontSize + "px", | |
534 | "zIndex": 10, | |
3bf2fa91 | 535 | "overflow": "hidden" |
ce49c2fa DV |
536 | }; |
537 | ||
ab5e5c75 DV |
538 | var bindEvt = function(eventName, classEventName, p, self) { |
539 | return function(e) { | |
540 | var a = p.annotation; | |
541 | if (a.hasOwnProperty(eventName)) { | |
542 | a[eventName](a, p, self.dygraph_, e); | |
543 | } else if (self.dygraph_.attr_(classEventName)) { | |
544 | self.dygraph_.attr_(classEventName)(a, p, self.dygraph_,e ); | |
545 | } | |
546 | }; | |
547 | } | |
548 | ||
ce49c2fa DV |
549 | // Get a list of point with annotations. |
550 | var points = this.layout.annotated_points; | |
551 | for (var i = 0; i < points.length; i++) { | |
552 | var p = points[i]; | |
e6d53148 DV |
553 | if (p.canvasx < this.area.x || p.canvasx > this.area.x + this.area.w) { |
554 | continue; | |
555 | } | |
556 | ||
ce5e8d36 DV |
557 | var a = p.annotation; |
558 | var tick_height = 6; | |
559 | if (a.hasOwnProperty("tickHeight")) { | |
560 | tick_height = a.tickHeight; | |
9a40897e DV |
561 | } |
562 | ||
ce49c2fa DV |
563 | var div = document.createElement("div"); |
564 | for (var name in annotationStyle) { | |
565 | if (annotationStyle.hasOwnProperty(name)) { | |
566 | div.style[name] = annotationStyle[name]; | |
567 | } | |
568 | } | |
ce5e8d36 DV |
569 | if (!a.hasOwnProperty('icon')) { |
570 | div.className = "dygraphDefaultAnnotation"; | |
571 | } | |
572 | if (a.hasOwnProperty('cssClass')) { | |
573 | div.className += " " + a.cssClass; | |
574 | } | |
575 | ||
a5ad69cc DV |
576 | var width = a.hasOwnProperty('width') ? a.width : 16; |
577 | var height = a.hasOwnProperty('height') ? a.height : 16; | |
ce5e8d36 DV |
578 | if (a.hasOwnProperty('icon')) { |
579 | var img = document.createElement("img"); | |
580 | img.src = a.icon; | |
33030f33 DV |
581 | img.width = width; |
582 | img.height = height; | |
ce5e8d36 DV |
583 | div.appendChild(img); |
584 | } else if (p.annotation.hasOwnProperty('shortText')) { | |
585 | div.appendChild(document.createTextNode(p.annotation.shortText)); | |
5c528fa2 | 586 | } |
ce5e8d36 | 587 | div.style.left = (p.canvasx - width / 2) + "px"; |
d14b9eed DV |
588 | if (a.attachAtBottom) { |
589 | div.style.top = (this.area.h - height - tick_height) + "px"; | |
590 | } else { | |
591 | div.style.top = (p.canvasy - height - tick_height) + "px"; | |
592 | } | |
ce5e8d36 DV |
593 | div.style.width = width + "px"; |
594 | div.style.height = height + "px"; | |
ce49c2fa DV |
595 | div.title = p.annotation.text; |
596 | div.style.color = this.colors[p.name]; | |
597 | div.style.borderColor = this.colors[p.name]; | |
e6d53148 | 598 | a.div = div; |
ab5e5c75 | 599 | |
9a40897e DV |
600 | Dygraph.addEvent(div, 'click', |
601 | bindEvt('clickHandler', 'annotationClickHandler', p, this)); | |
602 | Dygraph.addEvent(div, 'mouseover', | |
603 | bindEvt('mouseOverHandler', 'annotationMouseOverHandler', p, this)); | |
604 | Dygraph.addEvent(div, 'mouseout', | |
605 | bindEvt('mouseOutHandler', 'annotationMouseOutHandler', p, this)); | |
606 | Dygraph.addEvent(div, 'dblclick', | |
607 | bindEvt('dblClickHandler', 'annotationDblClickHandler', p, this)); | |
ab5e5c75 | 608 | |
ce49c2fa DV |
609 | this.container.appendChild(div); |
610 | this.annotations.push(div); | |
9a40897e DV |
611 | |
612 | var ctx = this.element.getContext("2d"); | |
613 | ctx.strokeStyle = this.colors[p.name]; | |
614 | ctx.beginPath(); | |
d14b9eed DV |
615 | if (!a.attachAtBottom) { |
616 | ctx.moveTo(p.canvasx, p.canvasy); | |
617 | ctx.lineTo(p.canvasx, p.canvasy - 2 - tick_height); | |
618 | } else { | |
619 | ctx.moveTo(p.canvasx, this.area.h); | |
620 | ctx.lineTo(p.canvasx, this.area.h - 2 - tick_height); | |
621 | } | |
9a40897e DV |
622 | ctx.closePath(); |
623 | ctx.stroke(); | |
ce49c2fa DV |
624 | } |
625 | }; | |
626 | ||
627 | ||
6a1aa64f DV |
628 | /** |
629 | * Overrides the CanvasRenderer method to draw error bars | |
630 | */ | |
285a6bda | 631 | DygraphCanvasRenderer.prototype._renderLineChart = function() { |
6a1aa64f DV |
632 | var context = this.element.getContext("2d"); |
633 | var colorCount = this.options.colorScheme.length; | |
634 | var colorScheme = this.options.colorScheme; | |
43af96e7 | 635 | var fillAlpha = this.options.fillAlpha; |
6a1aa64f | 636 | var errorBars = this.layout.options.errorBars; |
5954ef32 | 637 | var fillGraph = this.layout.options.fillGraph; |
354e15ab | 638 | var stackedGraph = this.layout.options.stackedGraph; |
afdc483f | 639 | var stepPlot = this.layout.options.stepPlot; |
21d3323f DV |
640 | |
641 | var setNames = []; | |
ca43052c | 642 | for (var name in this.layout.datasets) { |
85b99f0b DV |
643 | if (this.layout.datasets.hasOwnProperty(name)) { |
644 | setNames.push(name); | |
645 | } | |
ca43052c | 646 | } |
21d3323f | 647 | var setCount = setNames.length; |
6a1aa64f | 648 | |
f032c51d AV |
649 | this.colors = {} |
650 | for (var i = 0; i < setCount; i++) { | |
651 | this.colors[setNames[i]] = colorScheme[i % colorCount]; | |
652 | } | |
653 | ||
ff00d3e2 DV |
654 | // Update Points |
655 | // TODO(danvk): here | |
2160ed4a DV |
656 | for (var i = 0; i < this.layout.points.length; i++) { |
657 | var point = this.layout.points[i]; | |
6a1aa64f DV |
658 | point.canvasx = this.area.w * point.x + this.area.x; |
659 | point.canvasy = this.area.h * point.y + this.area.y; | |
660 | } | |
6a1aa64f DV |
661 | |
662 | // create paths | |
9317362d | 663 | var isOK = function(x) { return x && !isNaN(x); }; |
6a1aa64f | 664 | |
80aaae18 DV |
665 | var ctx = context; |
666 | if (errorBars) { | |
6a834bbb DV |
667 | if (fillGraph) { |
668 | this.dygraph_.warn("Can't use fillGraph option with error bars"); | |
669 | } | |
670 | ||
6a1aa64f DV |
671 | for (var i = 0; i < setCount; i++) { |
672 | var setName = setNames[i]; | |
f032c51d | 673 | var color = this.colors[setName]; |
6a1aa64f DV |
674 | |
675 | // setup graphics context | |
80aaae18 | 676 | ctx.save(); |
56623f3b | 677 | var prevX = NaN; |
afdc483f | 678 | var prevY = NaN; |
6a1aa64f | 679 | var prevYs = [-1, -1]; |
6a1aa64f | 680 | var yscale = this.layout.yscale; |
f474c2a3 DV |
681 | // should be same color as the lines but only 15% opaque. |
682 | var rgb = new RGBColor(color); | |
43af96e7 NK |
683 | var err_color = 'rgba(' + rgb.r + ',' + rgb.g + ',' + rgb.b + ',' + |
684 | fillAlpha + ')'; | |
f474c2a3 | 685 | ctx.fillStyle = err_color; |
05c9d0c4 DV |
686 | ctx.beginPath(); |
687 | for (var j = 0; j < this.layout.points.length; j++) { | |
688 | var point = this.layout.points[j]; | |
6a1aa64f | 689 | if (point.name == setName) { |
5954ef32 | 690 | if (!isOK(point.y)) { |
56623f3b | 691 | prevX = NaN; |
ae85914a | 692 | continue; |
5011e7a1 | 693 | } |
ce49c2fa | 694 | |
ff00d3e2 | 695 | // TODO(danvk): here |
afdc483f NN |
696 | if (stepPlot) { |
697 | var newYs = [ prevY - point.errorPlus * yscale, | |
47600757 | 698 | prevY + point.errorMinus * yscale ]; |
afdc483f NN |
699 | prevY = point.y; |
700 | } else { | |
701 | var newYs = [ point.y - point.errorPlus * yscale, | |
47600757 | 702 | point.y + point.errorMinus * yscale ]; |
afdc483f | 703 | } |
6a1aa64f DV |
704 | newYs[0] = this.area.h * newYs[0] + this.area.y; |
705 | newYs[1] = this.area.h * newYs[1] + this.area.y; | |
56623f3b | 706 | if (!isNaN(prevX)) { |
afdc483f | 707 | if (stepPlot) { |
47600757 | 708 | ctx.moveTo(prevX, newYs[0]); |
afdc483f | 709 | } else { |
47600757 | 710 | ctx.moveTo(prevX, prevYs[0]); |
afdc483f | 711 | } |
5954ef32 DV |
712 | ctx.lineTo(point.canvasx, newYs[0]); |
713 | ctx.lineTo(point.canvasx, newYs[1]); | |
afdc483f | 714 | if (stepPlot) { |
47600757 | 715 | ctx.lineTo(prevX, newYs[1]); |
afdc483f | 716 | } else { |
47600757 | 717 | ctx.lineTo(prevX, prevYs[1]); |
afdc483f | 718 | } |
5954ef32 DV |
719 | ctx.closePath(); |
720 | } | |
354e15ab | 721 | prevYs = newYs; |
5954ef32 DV |
722 | prevX = point.canvasx; |
723 | } | |
724 | } | |
725 | ctx.fill(); | |
726 | } | |
727 | } else if (fillGraph) { | |
354e15ab DE |
728 | var axisY = 1.0 + this.layout.minyval * this.layout.yscale; |
729 | if (axisY < 0.0) axisY = 0.0; | |
730 | else if (axisY > 1.0) axisY = 1.0; | |
731 | axisY = this.area.h * axisY + this.area.y; | |
732 | ||
733 | var baseline = [] // for stacked graphs: baseline for filling | |
734 | ||
735 | // process sets in reverse order (needed for stacked graphs) | |
736 | for (var i = setCount - 1; i >= 0; i--) { | |
5954ef32 | 737 | var setName = setNames[i]; |
f032c51d | 738 | var color = this.colors[setName]; |
5954ef32 DV |
739 | |
740 | // setup graphics context | |
741 | ctx.save(); | |
56623f3b | 742 | var prevX = NaN; |
5954ef32 | 743 | var prevYs = [-1, -1]; |
5954ef32 DV |
744 | var yscale = this.layout.yscale; |
745 | // should be same color as the lines but only 15% opaque. | |
746 | var rgb = new RGBColor(color); | |
43af96e7 NK |
747 | var err_color = 'rgba(' + rgb.r + ',' + rgb.g + ',' + rgb.b + ',' + |
748 | fillAlpha + ')'; | |
5954ef32 DV |
749 | ctx.fillStyle = err_color; |
750 | ctx.beginPath(); | |
751 | for (var j = 0; j < this.layout.points.length; j++) { | |
752 | var point = this.layout.points[j]; | |
5954ef32 DV |
753 | if (point.name == setName) { |
754 | if (!isOK(point.y)) { | |
56623f3b | 755 | prevX = NaN; |
5954ef32 DV |
756 | continue; |
757 | } | |
354e15ab DE |
758 | var newYs; |
759 | if (stackedGraph) { | |
760 | lastY = baseline[point.canvasx]; | |
761 | if (lastY === undefined) lastY = axisY; | |
762 | baseline[point.canvasx] = point.canvasy; | |
763 | newYs = [ point.canvasy, lastY ]; | |
764 | } else { | |
765 | newYs = [ point.canvasy, axisY ]; | |
766 | } | |
56623f3b | 767 | if (!isNaN(prevX)) { |
05c9d0c4 | 768 | ctx.moveTo(prevX, prevYs[0]); |
afdc483f | 769 | if (stepPlot) { |
47600757 | 770 | ctx.lineTo(point.canvasx, prevYs[0]); |
afdc483f | 771 | } else { |
47600757 | 772 | ctx.lineTo(point.canvasx, newYs[0]); |
afdc483f | 773 | } |
05c9d0c4 DV |
774 | ctx.lineTo(point.canvasx, newYs[1]); |
775 | ctx.lineTo(prevX, prevYs[1]); | |
776 | ctx.closePath(); | |
6a1aa64f | 777 | } |
354e15ab | 778 | prevYs = newYs; |
6a1aa64f DV |
779 | prevX = point.canvasx; |
780 | } | |
05c9d0c4 | 781 | } |
6a1aa64f DV |
782 | ctx.fill(); |
783 | } | |
80aaae18 DV |
784 | } |
785 | ||
786 | for (var i = 0; i < setCount; i++) { | |
787 | var setName = setNames[i]; | |
f032c51d | 788 | var color = this.colors[setName]; |
227b93cc | 789 | var strokeWidth = this.dygraph_.attr_("strokeWidth", setName); |
80aaae18 DV |
790 | |
791 | // setup graphics context | |
792 | context.save(); | |
793 | var point = this.layout.points[0]; | |
227b93cc | 794 | var pointSize = this.dygraph_.attr_("pointSize", setName); |
80aaae18 | 795 | var prevX = null, prevY = null; |
227b93cc | 796 | var drawPoints = this.dygraph_.attr_("drawPoints", setName); |
80aaae18 DV |
797 | var points = this.layout.points; |
798 | for (var j = 0; j < points.length; j++) { | |
799 | var point = points[j]; | |
800 | if (point.name == setName) { | |
801 | if (!isOK(point.canvasy)) { | |
5d13ef68 | 802 | if (stepPlot && prevX != null) { |
0599d13b NN |
803 | // Draw a horizontal line to the start of the missing data |
804 | ctx.beginPath(); | |
805 | ctx.strokeStyle = color; | |
806 | ctx.lineWidth = this.options.strokeWidth; | |
807 | ctx.moveTo(prevX, prevY); | |
808 | ctx.lineTo(point.canvasx, prevY); | |
809 | ctx.stroke(); | |
810 | } | |
80aaae18 DV |
811 | // this will make us move to the next point, not draw a line to it. |
812 | prevX = prevY = null; | |
813 | } else { | |
814 | // A point is "isolated" if it is non-null but both the previous | |
815 | // and next points are null. | |
816 | var isIsolated = (!prevX && (j == points.length - 1 || | |
817 | !isOK(points[j+1].canvasy))); | |
818 | ||
819 | if (!prevX) { | |
820 | prevX = point.canvasx; | |
821 | prevY = point.canvasy; | |
822 | } else { | |
46dde5f9 DV |
823 | // TODO(danvk): figure out why this conditional is necessary. |
824 | if (strokeWidth) { | |
825 | ctx.beginPath(); | |
826 | ctx.strokeStyle = color; | |
827 | ctx.lineWidth = strokeWidth; | |
828 | ctx.moveTo(prevX, prevY); | |
829 | if (stepPlot) { | |
830 | ctx.lineTo(point.canvasx, prevY); | |
831 | } | |
832 | prevX = point.canvasx; | |
833 | prevY = point.canvasy; | |
834 | ctx.lineTo(prevX, prevY); | |
835 | ctx.stroke(); | |
afdc483f | 836 | } |
80aaae18 DV |
837 | } |
838 | ||
839 | if (drawPoints || isIsolated) { | |
840 | ctx.beginPath(); | |
841 | ctx.fillStyle = color; | |
7bf6a9fe DV |
842 | ctx.arc(point.canvasx, point.canvasy, pointSize, |
843 | 0, 2 * Math.PI, false); | |
80aaae18 DV |
844 | ctx.fill(); |
845 | } | |
846 | } | |
847 | } | |
848 | } | |
849 | } | |
6a1aa64f | 850 | |
6a1aa64f DV |
851 | context.restore(); |
852 | }; |