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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]; | |
72 | var x1 = series[0][0]; | |
73 | if (!this.minxval || x1 < this.minxval) this.minxval = x1; | |
85b99f0b | 74 | |
f6401bf6 DV |
75 | var x2 = series[series.length - 1][0]; |
76 | if (!this.maxxval || x2 > this.maxxval) this.maxxval = x2; | |
77 | } | |
efe0829a DV |
78 | } |
79 | this.xrange = this.maxxval - this.minxval; | |
80 | this.xscale = (this.xrange != 0 ? 1/this.xrange : 1.0); | |
81 | ||
ea4942ed DV |
82 | for (var i = 0; i < this.options.yAxes.length; i++) { |
83 | var axis = this.options.yAxes[i]; | |
84 | axis.minyval = axis.valueRange[0]; | |
85 | axis.maxyval = axis.valueRange[1]; | |
86 | axis.yrange = axis.maxyval - axis.minyval; | |
87 | axis.yscale = (axis.yrange != 0 ? 1.0 / axis.yrange : 1.0); | |
88 | } | |
efe0829a DV |
89 | }; |
90 | ||
91 | DygraphLayout.prototype._evaluateLineCharts = function() { | |
92 | // add all the rects | |
93 | this.points = new Array(); | |
94 | for (var setName in this.datasets) { | |
85b99f0b DV |
95 | if (!this.datasets.hasOwnProperty(setName)) continue; |
96 | ||
97 | var dataset = this.datasets[setName]; | |
ea4942ed DV |
98 | var axis = this.options.yAxes[this.options.seriesToAxisMap[setName]]; |
99 | ||
85b99f0b DV |
100 | for (var j = 0; j < dataset.length; j++) { |
101 | var item = dataset[j]; | |
102 | var point = { | |
ff00d3e2 | 103 | // TODO(danvk): here |
85b99f0b | 104 | x: ((parseFloat(item[0]) - this.minxval) * this.xscale), |
ea4942ed | 105 | y: 1.0 - ((parseFloat(item[1]) - axis.minyval) * axis.yscale), |
85b99f0b DV |
106 | xval: parseFloat(item[0]), |
107 | yval: parseFloat(item[1]), | |
108 | name: setName | |
109 | }; | |
110 | ||
111 | // limit the x, y values so they do not overdraw | |
112 | if (point.y <= 0.0) { | |
113 | point.y = 0.0; | |
114 | } | |
115 | if (point.y >= 1.0) { | |
116 | point.y = 1.0; | |
117 | } | |
1a26f3fb | 118 | this.points.push(point); |
85b99f0b | 119 | } |
efe0829a DV |
120 | } |
121 | }; | |
122 | ||
123 | DygraphLayout.prototype._evaluateLineTicks = function() { | |
124 | this.xticks = new Array(); | |
125 | for (var i = 0; i < this.options.xTicks.length; i++) { | |
126 | var tick = this.options.xTicks[i]; | |
127 | var label = tick.label; | |
128 | var pos = this.xscale * (tick.v - this.minxval); | |
129 | if ((pos >= 0.0) && (pos <= 1.0)) { | |
130 | this.xticks.push([pos, label]); | |
131 | } | |
132 | } | |
133 | ||
134 | this.yticks = new Array(); | |
9012dd21 | 135 | for (var i = 0; i < this.options.yAxes.length; i++ ) { |
67076b22 DV |
136 | var axis = this.options.yAxes[i]; |
137 | for (var j = 0; j < axis.ticks.length; j++) { | |
138 | var tick = axis.ticks[j]; | |
139 | var label = tick.label; | |
140 | var pos = 1.0 - (axis.yscale * (tick.v - axis.minyval)); | |
141 | if ((pos >= 0.0) && (pos <= 1.0)) { | |
9012dd21 | 142 | this.yticks.push([i, pos, label]); |
67076b22 | 143 | } |
efe0829a DV |
144 | } |
145 | } | |
146 | }; | |
147 | ||
6a1aa64f DV |
148 | |
149 | /** | |
150 | * Behaves the same way as PlotKit.Layout, but also copies the errors | |
151 | * @private | |
152 | */ | |
285a6bda | 153 | DygraphLayout.prototype.evaluateWithError = function() { |
6a1aa64f DV |
154 | this.evaluate(); |
155 | if (!this.options.errorBars) return; | |
156 | ||
157 | // Copy over the error terms | |
158 | var i = 0; // index in this.points | |
159 | for (var setName in this.datasets) { | |
85b99f0b DV |
160 | if (!this.datasets.hasOwnProperty(setName)) continue; |
161 | var j = 0; | |
162 | var dataset = this.datasets[setName]; | |
163 | for (var j = 0; j < dataset.length; j++, i++) { | |
164 | var item = dataset[j]; | |
165 | var xv = parseFloat(item[0]); | |
166 | var yv = parseFloat(item[1]); | |
167 | ||
168 | if (xv == this.points[i].xval && | |
169 | yv == this.points[i].yval) { | |
170 | this.points[i].errorMinus = parseFloat(item[2]); | |
171 | this.points[i].errorPlus = parseFloat(item[3]); | |
172 | } | |
173 | } | |
6a1aa64f DV |
174 | } |
175 | }; | |
176 | ||
ce49c2fa DV |
177 | DygraphLayout.prototype._evaluateAnnotations = function() { |
178 | // Add the annotations to the point to which they belong. | |
179 | // Make a map from (setName, xval) to annotation for quick lookups. | |
180 | var annotations = {}; | |
181 | for (var i = 0; i < this.annotations.length; i++) { | |
182 | var a = this.annotations[i]; | |
183 | annotations[a.xval + "," + a.series] = a; | |
184 | } | |
185 | ||
186 | this.annotated_points = []; | |
187 | for (var i = 0; i < this.points.length; i++) { | |
188 | var p = this.points[i]; | |
189 | var k = p.xval + "," + p.name; | |
190 | if (k in annotations) { | |
191 | p.annotation = annotations[k]; | |
192 | this.annotated_points.push(p); | |
193 | } | |
194 | } | |
195 | }; | |
196 | ||
6a1aa64f DV |
197 | /** |
198 | * Convenience function to remove all the data sets from a graph | |
199 | */ | |
285a6bda | 200 | DygraphLayout.prototype.removeAllDatasets = function() { |
6a1aa64f DV |
201 | delete this.datasets; |
202 | this.datasets = new Array(); | |
203 | }; | |
204 | ||
205 | /** | |
206 | * Change the values of various layout options | |
207 | * @param {Object} new_options an associative array of new properties | |
208 | */ | |
285a6bda | 209 | DygraphLayout.prototype.updateOptions = function(new_options) { |
fc80a396 | 210 | Dygraph.update(this.options, new_options ? new_options : {}); |
6a1aa64f DV |
211 | }; |
212 | ||
213 | // Subclass PlotKit.CanvasRenderer to add: | |
214 | // 1. X/Y grid overlay | |
215 | // 2. Ability to draw error bars (if required) | |
216 | ||
217 | /** | |
218 | * Sets some PlotKit.CanvasRenderer options | |
219 | * @param {Object} element The canvas to attach to | |
285a6bda | 220 | * @param {Layout} layout The DygraphLayout object for this graph. |
6a1aa64f DV |
221 | * @param {Object} options Options to pass on to CanvasRenderer |
222 | */ | |
9317362d DV |
223 | DygraphCanvasRenderer = function(dygraph, element, layout, options) { |
224 | // TODO(danvk): remove options, just use dygraph.attr_. | |
9317362d | 225 | this.dygraph_ = dygraph; |
fbe31dc8 DV |
226 | |
227 | // default options | |
228 | this.options = { | |
f474c2a3 DV |
229 | "strokeWidth": 0.5, |
230 | "drawXAxis": true, | |
231 | "drawYAxis": true, | |
232 | "axisLineColor": "black", | |
233 | "axisLineWidth": 0.5, | |
234 | "axisTickSize": 3, | |
235 | "axisLabelColor": "black", | |
236 | "axisLabelFont": "Arial", | |
237 | "axisLabelFontSize": 9, | |
238 | "axisLabelWidth": 50, | |
239 | "drawYGrid": true, | |
240 | "drawXGrid": true, | |
43af96e7 | 241 | "gridLineColor": "rgb(128,128,128)", |
e7746234 EC |
242 | "fillAlpha": 0.15, |
243 | "underlayCallback": null | |
fbe31dc8 | 244 | }; |
fc80a396 | 245 | Dygraph.update(this.options, options); |
6a1aa64f | 246 | |
fbe31dc8 | 247 | this.layout = layout; |
b0c3b730 | 248 | this.element = element; |
fbe31dc8 DV |
249 | this.container = this.element.parentNode; |
250 | ||
fbe31dc8 DV |
251 | this.height = this.element.height; |
252 | this.width = this.element.width; | |
253 | ||
254 | // --- check whether everything is ok before we return | |
255 | if (!this.isIE && !(DygraphCanvasRenderer.isSupported(this.element))) | |
256 | throw "Canvas is not supported."; | |
257 | ||
258 | // internal state | |
259 | this.xlabels = new Array(); | |
260 | this.ylabels = new Array(); | |
ce49c2fa | 261 | this.annotations = new Array(); |
fbe31dc8 | 262 | |
ea4942ed | 263 | // TODO(danvk): consider all axes in this computation. |
fbe31dc8 | 264 | this.area = { |
9012dd21 | 265 | // TODO(danvk): per-axis setting. |
fbe31dc8 DV |
266 | x: this.options.yAxisLabelWidth + 2 * this.options.axisTickSize, |
267 | y: 0 | |
268 | }; | |
269 | this.area.w = this.width - this.area.x - this.options.rightGap; | |
270 | this.area.h = this.height - this.options.axisLabelFontSize - | |
271 | 2 * this.options.axisTickSize; | |
272 | ||
b0c3b730 DV |
273 | this.container.style.position = "relative"; |
274 | this.container.style.width = this.width + "px"; | |
fbe31dc8 DV |
275 | }; |
276 | ||
277 | DygraphCanvasRenderer.prototype.clear = function() { | |
278 | if (this.isIE) { | |
279 | // VML takes a while to start up, so we just poll every this.IEDelay | |
280 | try { | |
281 | if (this.clearDelay) { | |
282 | this.clearDelay.cancel(); | |
283 | this.clearDelay = null; | |
284 | } | |
285 | var context = this.element.getContext("2d"); | |
286 | } | |
287 | catch (e) { | |
76171648 | 288 | // TODO(danvk): this is broken, since MochiKit.Async is gone. |
fbe31dc8 DV |
289 | this.clearDelay = MochiKit.Async.wait(this.IEDelay); |
290 | this.clearDelay.addCallback(bind(this.clear, this)); | |
291 | return; | |
292 | } | |
293 | } | |
294 | ||
295 | var context = this.element.getContext("2d"); | |
296 | context.clearRect(0, 0, this.width, this.height); | |
297 | ||
2160ed4a | 298 | for (var i = 0; i < this.xlabels.length; i++) { |
b0c3b730 DV |
299 | var el = this.xlabels[i]; |
300 | el.parentNode.removeChild(el); | |
2160ed4a DV |
301 | } |
302 | for (var i = 0; i < this.ylabels.length; i++) { | |
b0c3b730 DV |
303 | var el = this.ylabels[i]; |
304 | el.parentNode.removeChild(el); | |
2160ed4a | 305 | } |
ce49c2fa DV |
306 | for (var i = 0; i < this.annotations.length; i++) { |
307 | var el = this.annotations[i]; | |
308 | el.parentNode.removeChild(el); | |
309 | } | |
fbe31dc8 DV |
310 | this.xlabels = new Array(); |
311 | this.ylabels = new Array(); | |
ce49c2fa | 312 | this.annotations = new Array(); |
fbe31dc8 DV |
313 | }; |
314 | ||
315 | ||
316 | DygraphCanvasRenderer.isSupported = function(canvasName) { | |
317 | var canvas = null; | |
318 | try { | |
21d3323f | 319 | if (typeof(canvasName) == 'undefined' || canvasName == null) |
b0c3b730 | 320 | canvas = document.createElement("canvas"); |
fbe31dc8 | 321 | else |
b0c3b730 | 322 | canvas = canvasName; |
fbe31dc8 DV |
323 | var context = canvas.getContext("2d"); |
324 | } | |
325 | catch (e) { | |
326 | var ie = navigator.appVersion.match(/MSIE (\d\.\d)/); | |
327 | var opera = (navigator.userAgent.toLowerCase().indexOf("opera") != -1); | |
328 | if ((!ie) || (ie[1] < 6) || (opera)) | |
329 | return false; | |
330 | return true; | |
331 | } | |
332 | return true; | |
6a1aa64f | 333 | }; |
6a1aa64f DV |
334 | |
335 | /** | |
336 | * Draw an X/Y grid on top of the existing plot | |
337 | */ | |
285a6bda | 338 | DygraphCanvasRenderer.prototype.render = function() { |
9012dd21 DV |
339 | // Shrink the drawing area to accomodate additional y-axes. |
340 | if (this.layout.options.yAxes.length == 2) { | |
341 | // TODO(danvk): per-axis setting. | |
342 | this.area.w -= (this.options.yAxisLabelWidth + 2 * this.options.axisTickSize); | |
343 | } else if (this.layout.options.yAxes.length > 2) { | |
344 | this.dygraph_.error("Only two y-axes are supported at this time. (Trying " + | |
345 | "to use " + this.layout.yAxes.length + ")"); | |
346 | } | |
347 | ||
6a1aa64f DV |
348 | // Draw the new X/Y grid |
349 | var ctx = this.element.getContext("2d"); | |
e7746234 EC |
350 | |
351 | if (this.options.underlayCallback) { | |
d9e6fa47 | 352 | this.options.underlayCallback(ctx, this.area, this.layout, this.dygraph_); |
e7746234 EC |
353 | } |
354 | ||
6a1aa64f DV |
355 | if (this.options.drawYGrid) { |
356 | var ticks = this.layout.yticks; | |
357 | ctx.save(); | |
f2f24402 | 358 | ctx.strokeStyle = this.options.gridLineColor; |
6a1aa64f DV |
359 | ctx.lineWidth = this.options.axisLineWidth; |
360 | for (var i = 0; i < ticks.length; i++) { | |
9012dd21 | 361 | if (ticks[i][0] != 0) continue; // TODO(danvk): per-axis property |
6a1aa64f | 362 | var x = this.area.x; |
9012dd21 | 363 | var y = this.area.y + ticks[i][1] * this.area.h; |
6a1aa64f DV |
364 | ctx.beginPath(); |
365 | ctx.moveTo(x, y); | |
366 | ctx.lineTo(x + this.area.w, y); | |
367 | ctx.closePath(); | |
368 | ctx.stroke(); | |
369 | } | |
370 | } | |
371 | ||
372 | if (this.options.drawXGrid) { | |
373 | var ticks = this.layout.xticks; | |
374 | ctx.save(); | |
f2f24402 | 375 | ctx.strokeStyle = this.options.gridLineColor; |
6a1aa64f DV |
376 | ctx.lineWidth = this.options.axisLineWidth; |
377 | for (var i=0; i<ticks.length; i++) { | |
9012dd21 | 378 | var x = this.area.x + ticks[i][1] * this.area.w; |
6a1aa64f DV |
379 | var y = this.area.y + this.area.h; |
380 | ctx.beginPath(); | |
381 | ctx.moveTo(x, y); | |
382 | ctx.lineTo(x, this.area.y); | |
383 | ctx.closePath(); | |
384 | ctx.stroke(); | |
385 | } | |
386 | } | |
2ce09b19 DV |
387 | |
388 | // Do the ordinary rendering, as before | |
2ce09b19 | 389 | this._renderLineChart(); |
fbe31dc8 | 390 | this._renderAxis(); |
ce49c2fa | 391 | this._renderAnnotations(); |
fbe31dc8 DV |
392 | }; |
393 | ||
394 | ||
395 | DygraphCanvasRenderer.prototype._renderAxis = function() { | |
396 | if (!this.options.drawXAxis && !this.options.drawYAxis) | |
397 | return; | |
398 | ||
399 | var context = this.element.getContext("2d"); | |
400 | ||
34fedff8 DV |
401 | var labelStyle = { |
402 | "position": "absolute", | |
403 | "fontSize": this.options.axisLabelFontSize + "px", | |
404 | "zIndex": 10, | |
f474c2a3 | 405 | "color": this.options.axisLabelColor, |
34fedff8 DV |
406 | "width": this.options.axisLabelWidth + "px", |
407 | "overflow": "hidden" | |
408 | }; | |
409 | var makeDiv = function(txt) { | |
410 | var div = document.createElement("div"); | |
411 | for (var name in labelStyle) { | |
85b99f0b DV |
412 | if (labelStyle.hasOwnProperty(name)) { |
413 | div.style[name] = labelStyle[name]; | |
414 | } | |
fbe31dc8 | 415 | } |
34fedff8 DV |
416 | div.appendChild(document.createTextNode(txt)); |
417 | return div; | |
fbe31dc8 DV |
418 | }; |
419 | ||
420 | // axis lines | |
421 | context.save(); | |
f474c2a3 | 422 | context.strokeStyle = this.options.axisLineColor; |
fbe31dc8 DV |
423 | context.lineWidth = this.options.axisLineWidth; |
424 | ||
fbe31dc8 | 425 | if (this.options.drawYAxis) { |
8b7a0cc3 | 426 | if (this.layout.yticks && this.layout.yticks.length > 0) { |
2160ed4a DV |
427 | for (var i = 0; i < this.layout.yticks.length; i++) { |
428 | var tick = this.layout.yticks[i]; | |
fbe31dc8 DV |
429 | if (typeof(tick) == "function") return; |
430 | var x = this.area.x; | |
9012dd21 DV |
431 | if (tick[0] == 1) { |
432 | x = this.area.x + this.area.w - labelStyle.width; | |
433 | } | |
434 | var y = this.area.y + tick[1] * this.area.h; | |
fbe31dc8 DV |
435 | context.beginPath(); |
436 | context.moveTo(x, y); | |
437 | context.lineTo(x - this.options.axisTickSize, y); | |
438 | context.closePath(); | |
439 | context.stroke(); | |
440 | ||
9012dd21 | 441 | var label = makeDiv(tick[2]); |
fbe31dc8 DV |
442 | var top = (y - this.options.axisLabelFontSize / 2); |
443 | if (top < 0) top = 0; | |
444 | ||
445 | if (top + this.options.axisLabelFontSize + 3 > this.height) { | |
446 | label.style.bottom = "0px"; | |
447 | } else { | |
448 | label.style.top = top + "px"; | |
449 | } | |
9012dd21 DV |
450 | if (tick[0] == 0) { |
451 | label.style.left = "0px"; | |
452 | label.style.textAlign = "right"; | |
453 | } else if (tick[0] == 1) { | |
454 | label.style.left = (this.area.x + this.area.w + | |
455 | this.options.axisTickSize) + "px"; | |
456 | label.style.textAlign = "left"; | |
457 | } | |
fbe31dc8 | 458 | label.style.width = this.options.yAxisLabelWidth + "px"; |
b0c3b730 | 459 | this.container.appendChild(label); |
fbe31dc8 | 460 | this.ylabels.push(label); |
2160ed4a | 461 | } |
fbe31dc8 DV |
462 | |
463 | // The lowest tick on the y-axis often overlaps with the leftmost | |
464 | // tick on the x-axis. Shift the bottom tick up a little bit to | |
465 | // compensate if necessary. | |
466 | var bottomTick = this.ylabels[0]; | |
467 | var fontSize = this.options.axisLabelFontSize; | |
468 | var bottom = parseInt(bottomTick.style.top) + fontSize; | |
469 | if (bottom > this.height - fontSize) { | |
470 | bottomTick.style.top = (parseInt(bottomTick.style.top) - | |
471 | fontSize / 2) + "px"; | |
472 | } | |
473 | } | |
474 | ||
475 | context.beginPath(); | |
476 | context.moveTo(this.area.x, this.area.y); | |
477 | context.lineTo(this.area.x, this.area.y + this.area.h); | |
478 | context.closePath(); | |
479 | context.stroke(); | |
480 | } | |
481 | ||
482 | if (this.options.drawXAxis) { | |
483 | if (this.layout.xticks) { | |
2160ed4a DV |
484 | for (var i = 0; i < this.layout.xticks.length; i++) { |
485 | var tick = this.layout.xticks[i]; | |
fbe31dc8 DV |
486 | if (typeof(dataset) == "function") return; |
487 | ||
488 | var x = this.area.x + tick[0] * this.area.w; | |
489 | var y = this.area.y + this.area.h; | |
490 | context.beginPath(); | |
491 | context.moveTo(x, y); | |
492 | context.lineTo(x, y + this.options.axisTickSize); | |
493 | context.closePath(); | |
494 | context.stroke(); | |
495 | ||
34fedff8 | 496 | var label = makeDiv(tick[1]); |
fbe31dc8 DV |
497 | label.style.textAlign = "center"; |
498 | label.style.bottom = "0px"; | |
499 | ||
500 | var left = (x - this.options.axisLabelWidth/2); | |
501 | if (left + this.options.axisLabelWidth > this.width) { | |
502 | left = this.width - this.options.xAxisLabelWidth; | |
503 | label.style.textAlign = "right"; | |
504 | } | |
505 | if (left < 0) { | |
506 | left = 0; | |
507 | label.style.textAlign = "left"; | |
508 | } | |
509 | ||
510 | label.style.left = left + "px"; | |
511 | label.style.width = this.options.xAxisLabelWidth + "px"; | |
b0c3b730 | 512 | this.container.appendChild(label); |
fbe31dc8 | 513 | this.xlabels.push(label); |
2160ed4a | 514 | } |
fbe31dc8 DV |
515 | } |
516 | ||
517 | context.beginPath(); | |
518 | context.moveTo(this.area.x, this.area.y + this.area.h); | |
519 | context.lineTo(this.area.x + this.area.w, this.area.y + this.area.h); | |
520 | context.closePath(); | |
521 | context.stroke(); | |
522 | } | |
523 | ||
524 | context.restore(); | |
6a1aa64f DV |
525 | }; |
526 | ||
fbe31dc8 | 527 | |
ce49c2fa DV |
528 | DygraphCanvasRenderer.prototype._renderAnnotations = function() { |
529 | var annotationStyle = { | |
530 | "position": "absolute", | |
531 | "fontSize": this.options.axisLabelFontSize + "px", | |
532 | "zIndex": 10, | |
3bf2fa91 | 533 | "overflow": "hidden" |
ce49c2fa DV |
534 | }; |
535 | ||
ab5e5c75 DV |
536 | var bindEvt = function(eventName, classEventName, p, self) { |
537 | return function(e) { | |
538 | var a = p.annotation; | |
539 | if (a.hasOwnProperty(eventName)) { | |
540 | a[eventName](a, p, self.dygraph_, e); | |
541 | } else if (self.dygraph_.attr_(classEventName)) { | |
542 | self.dygraph_.attr_(classEventName)(a, p, self.dygraph_,e ); | |
543 | } | |
544 | }; | |
545 | } | |
546 | ||
ce49c2fa DV |
547 | // Get a list of point with annotations. |
548 | var points = this.layout.annotated_points; | |
549 | for (var i = 0; i < points.length; i++) { | |
550 | var p = points[i]; | |
e6d53148 DV |
551 | if (p.canvasx < this.area.x || p.canvasx > this.area.x + this.area.w) { |
552 | continue; | |
553 | } | |
554 | ||
ce5e8d36 DV |
555 | var a = p.annotation; |
556 | var tick_height = 6; | |
557 | if (a.hasOwnProperty("tickHeight")) { | |
558 | tick_height = a.tickHeight; | |
9a40897e DV |
559 | } |
560 | ||
ce49c2fa DV |
561 | var div = document.createElement("div"); |
562 | for (var name in annotationStyle) { | |
563 | if (annotationStyle.hasOwnProperty(name)) { | |
564 | div.style[name] = annotationStyle[name]; | |
565 | } | |
566 | } | |
ce5e8d36 DV |
567 | if (!a.hasOwnProperty('icon')) { |
568 | div.className = "dygraphDefaultAnnotation"; | |
569 | } | |
570 | if (a.hasOwnProperty('cssClass')) { | |
571 | div.className += " " + a.cssClass; | |
572 | } | |
573 | ||
a5ad69cc DV |
574 | var width = a.hasOwnProperty('width') ? a.width : 16; |
575 | var height = a.hasOwnProperty('height') ? a.height : 16; | |
ce5e8d36 DV |
576 | if (a.hasOwnProperty('icon')) { |
577 | var img = document.createElement("img"); | |
578 | img.src = a.icon; | |
33030f33 DV |
579 | img.width = width; |
580 | img.height = height; | |
ce5e8d36 DV |
581 | div.appendChild(img); |
582 | } else if (p.annotation.hasOwnProperty('shortText')) { | |
583 | div.appendChild(document.createTextNode(p.annotation.shortText)); | |
5c528fa2 | 584 | } |
ce5e8d36 | 585 | div.style.left = (p.canvasx - width / 2) + "px"; |
d14b9eed DV |
586 | if (a.attachAtBottom) { |
587 | div.style.top = (this.area.h - height - tick_height) + "px"; | |
588 | } else { | |
589 | div.style.top = (p.canvasy - height - tick_height) + "px"; | |
590 | } | |
ce5e8d36 DV |
591 | div.style.width = width + "px"; |
592 | div.style.height = height + "px"; | |
ce49c2fa DV |
593 | div.title = p.annotation.text; |
594 | div.style.color = this.colors[p.name]; | |
595 | div.style.borderColor = this.colors[p.name]; | |
e6d53148 | 596 | a.div = div; |
ab5e5c75 | 597 | |
9a40897e DV |
598 | Dygraph.addEvent(div, 'click', |
599 | bindEvt('clickHandler', 'annotationClickHandler', p, this)); | |
600 | Dygraph.addEvent(div, 'mouseover', | |
601 | bindEvt('mouseOverHandler', 'annotationMouseOverHandler', p, this)); | |
602 | Dygraph.addEvent(div, 'mouseout', | |
603 | bindEvt('mouseOutHandler', 'annotationMouseOutHandler', p, this)); | |
604 | Dygraph.addEvent(div, 'dblclick', | |
605 | bindEvt('dblClickHandler', 'annotationDblClickHandler', p, this)); | |
ab5e5c75 | 606 | |
ce49c2fa DV |
607 | this.container.appendChild(div); |
608 | this.annotations.push(div); | |
9a40897e DV |
609 | |
610 | var ctx = this.element.getContext("2d"); | |
611 | ctx.strokeStyle = this.colors[p.name]; | |
612 | ctx.beginPath(); | |
d14b9eed DV |
613 | if (!a.attachAtBottom) { |
614 | ctx.moveTo(p.canvasx, p.canvasy); | |
615 | ctx.lineTo(p.canvasx, p.canvasy - 2 - tick_height); | |
616 | } else { | |
617 | ctx.moveTo(p.canvasx, this.area.h); | |
618 | ctx.lineTo(p.canvasx, this.area.h - 2 - tick_height); | |
619 | } | |
9a40897e DV |
620 | ctx.closePath(); |
621 | ctx.stroke(); | |
ce49c2fa DV |
622 | } |
623 | }; | |
624 | ||
625 | ||
6a1aa64f DV |
626 | /** |
627 | * Overrides the CanvasRenderer method to draw error bars | |
628 | */ | |
285a6bda | 629 | DygraphCanvasRenderer.prototype._renderLineChart = function() { |
6a1aa64f DV |
630 | var context = this.element.getContext("2d"); |
631 | var colorCount = this.options.colorScheme.length; | |
632 | var colorScheme = this.options.colorScheme; | |
43af96e7 | 633 | var fillAlpha = this.options.fillAlpha; |
6a1aa64f | 634 | var errorBars = this.layout.options.errorBars; |
5954ef32 | 635 | var fillGraph = this.layout.options.fillGraph; |
354e15ab | 636 | var stackedGraph = this.layout.options.stackedGraph; |
afdc483f | 637 | var stepPlot = this.layout.options.stepPlot; |
21d3323f DV |
638 | |
639 | var setNames = []; | |
ca43052c | 640 | for (var name in this.layout.datasets) { |
85b99f0b DV |
641 | if (this.layout.datasets.hasOwnProperty(name)) { |
642 | setNames.push(name); | |
643 | } | |
ca43052c | 644 | } |
21d3323f | 645 | var setCount = setNames.length; |
6a1aa64f | 646 | |
f032c51d AV |
647 | this.colors = {} |
648 | for (var i = 0; i < setCount; i++) { | |
649 | this.colors[setNames[i]] = colorScheme[i % colorCount]; | |
650 | } | |
651 | ||
ff00d3e2 DV |
652 | // Update Points |
653 | // TODO(danvk): here | |
2160ed4a DV |
654 | for (var i = 0; i < this.layout.points.length; i++) { |
655 | var point = this.layout.points[i]; | |
6a1aa64f DV |
656 | point.canvasx = this.area.w * point.x + this.area.x; |
657 | point.canvasy = this.area.h * point.y + this.area.y; | |
658 | } | |
6a1aa64f DV |
659 | |
660 | // create paths | |
9317362d | 661 | var isOK = function(x) { return x && !isNaN(x); }; |
6a1aa64f | 662 | |
80aaae18 DV |
663 | var ctx = context; |
664 | if (errorBars) { | |
6a834bbb DV |
665 | if (fillGraph) { |
666 | this.dygraph_.warn("Can't use fillGraph option with error bars"); | |
667 | } | |
668 | ||
6a1aa64f DV |
669 | for (var i = 0; i < setCount; i++) { |
670 | var setName = setNames[i]; | |
ea4942ed DV |
671 | var axis = this.layout.options.yAxes[ |
672 | this.layout.options.seriesToAxisMap[setName]]; | |
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]; |
ea4942ed | 680 | var yscale = axis.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 baseline = [] // for stacked graphs: baseline for filling |
729 | ||
730 | // process sets in reverse order (needed for stacked graphs) | |
731 | for (var i = setCount - 1; i >= 0; i--) { | |
5954ef32 | 732 | var setName = setNames[i]; |
f032c51d | 733 | var color = this.colors[setName]; |
ea4942ed DV |
734 | var axis = this.layout.options.yAxes[ |
735 | this.layout.options.seriesToAxisMap[setName]]; | |
736 | var axisY = 1.0 + axis.minyval * axis.yscale; | |
737 | if (axisY < 0.0) axisY = 0.0; | |
738 | else if (axisY > 1.0) axisY = 1.0; | |
739 | axisY = this.area.h * axisY + this.area.y; | |
5954ef32 DV |
740 | |
741 | // setup graphics context | |
742 | ctx.save(); | |
56623f3b | 743 | var prevX = NaN; |
5954ef32 | 744 | var prevYs = [-1, -1]; |
ea4942ed | 745 | var yscale = axis.yscale; |
5954ef32 DV |
746 | // should be same color as the lines but only 15% opaque. |
747 | var rgb = new RGBColor(color); | |
43af96e7 NK |
748 | var err_color = 'rgba(' + rgb.r + ',' + rgb.g + ',' + rgb.b + ',' + |
749 | fillAlpha + ')'; | |
5954ef32 DV |
750 | ctx.fillStyle = err_color; |
751 | ctx.beginPath(); | |
752 | for (var j = 0; j < this.layout.points.length; j++) { | |
753 | var point = this.layout.points[j]; | |
5954ef32 DV |
754 | if (point.name == setName) { |
755 | if (!isOK(point.y)) { | |
56623f3b | 756 | prevX = NaN; |
5954ef32 DV |
757 | continue; |
758 | } | |
354e15ab DE |
759 | var newYs; |
760 | if (stackedGraph) { | |
761 | lastY = baseline[point.canvasx]; | |
762 | if (lastY === undefined) lastY = axisY; | |
763 | baseline[point.canvasx] = point.canvasy; | |
764 | newYs = [ point.canvasy, lastY ]; | |
765 | } else { | |
766 | newYs = [ point.canvasy, axisY ]; | |
767 | } | |
56623f3b | 768 | if (!isNaN(prevX)) { |
05c9d0c4 | 769 | ctx.moveTo(prevX, prevYs[0]); |
afdc483f | 770 | if (stepPlot) { |
47600757 | 771 | ctx.lineTo(point.canvasx, prevYs[0]); |
afdc483f | 772 | } else { |
47600757 | 773 | ctx.lineTo(point.canvasx, newYs[0]); |
afdc483f | 774 | } |
05c9d0c4 DV |
775 | ctx.lineTo(point.canvasx, newYs[1]); |
776 | ctx.lineTo(prevX, prevYs[1]); | |
777 | ctx.closePath(); | |
6a1aa64f | 778 | } |
354e15ab | 779 | prevYs = newYs; |
6a1aa64f DV |
780 | prevX = point.canvasx; |
781 | } | |
05c9d0c4 | 782 | } |
6a1aa64f DV |
783 | ctx.fill(); |
784 | } | |
80aaae18 DV |
785 | } |
786 | ||
787 | for (var i = 0; i < setCount; i++) { | |
788 | var setName = setNames[i]; | |
f032c51d | 789 | var color = this.colors[setName]; |
227b93cc | 790 | var strokeWidth = this.dygraph_.attr_("strokeWidth", setName); |
80aaae18 DV |
791 | |
792 | // setup graphics context | |
793 | context.save(); | |
794 | var point = this.layout.points[0]; | |
227b93cc | 795 | var pointSize = this.dygraph_.attr_("pointSize", setName); |
80aaae18 | 796 | var prevX = null, prevY = null; |
227b93cc | 797 | var drawPoints = this.dygraph_.attr_("drawPoints", setName); |
80aaae18 DV |
798 | var points = this.layout.points; |
799 | for (var j = 0; j < points.length; j++) { | |
800 | var point = points[j]; | |
801 | if (point.name == setName) { | |
802 | if (!isOK(point.canvasy)) { | |
803 | // this will make us move to the next point, not draw a line to it. | |
804 | prevX = prevY = null; | |
805 | } else { | |
806 | // A point is "isolated" if it is non-null but both the previous | |
807 | // and next points are null. | |
808 | var isIsolated = (!prevX && (j == points.length - 1 || | |
809 | !isOK(points[j+1].canvasy))); | |
810 | ||
811 | if (!prevX) { | |
812 | prevX = point.canvasx; | |
813 | prevY = point.canvasy; | |
814 | } else { | |
46dde5f9 DV |
815 | // TODO(danvk): figure out why this conditional is necessary. |
816 | if (strokeWidth) { | |
817 | ctx.beginPath(); | |
818 | ctx.strokeStyle = color; | |
819 | ctx.lineWidth = strokeWidth; | |
820 | ctx.moveTo(prevX, prevY); | |
821 | if (stepPlot) { | |
822 | ctx.lineTo(point.canvasx, prevY); | |
823 | } | |
824 | prevX = point.canvasx; | |
825 | prevY = point.canvasy; | |
826 | ctx.lineTo(prevX, prevY); | |
827 | ctx.stroke(); | |
afdc483f | 828 | } |
80aaae18 DV |
829 | } |
830 | ||
831 | if (drawPoints || isIsolated) { | |
832 | ctx.beginPath(); | |
833 | ctx.fillStyle = color; | |
7bf6a9fe DV |
834 | ctx.arc(point.canvasx, point.canvasy, pointSize, |
835 | 0, 2 * Math.PI, false); | |
80aaae18 DV |
836 | ctx.fill(); |
837 | } | |
838 | } | |
839 | } | |
840 | } | |
841 | } | |
6a1aa64f | 842 | |
6a1aa64f DV |
843 | context.restore(); |
844 | }; |