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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 | |
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(); |
937029df | 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. | |
973e2b79 | 36 | this.annotations = []; |
5c528fa2 DV |
37 | var parse = this.attr_('xValueParser'); |
38 | for (var i = 0; i < ann.length; i++) { | |
39 | var a = {}; | |
a685723c | 40 | if (!ann[i].xval && !ann[i].x) { |
5c528fa2 DV |
41 | this.dygraph_.error("Annotations must have an 'x' property"); |
42 | return; | |
43 | } | |
ce5e8d36 | 44 | if (ann[i].icon && |
33030f33 DV |
45 | !(ann[i].hasOwnProperty('width') && |
46 | ann[i].hasOwnProperty('height'))) { | |
47 | this.dygraph_.error("Must set width and height when setting " + | |
ce5e8d36 DV |
48 | "annotation.icon property"); |
49 | return; | |
50 | } | |
5c528fa2 | 51 | Dygraph.update(a, ann[i]); |
a685723c | 52 | if (!a.xval) a.xval = parse(a.x); |
5c528fa2 | 53 | this.annotations.push(a); |
ce49c2fa | 54 | } |
ce49c2fa DV |
55 | }; |
56 | ||
efe0829a DV |
57 | DygraphLayout.prototype.evaluate = function() { |
58 | this._evaluateLimits(); | |
59 | this._evaluateLineCharts(); | |
60 | this._evaluateLineTicks(); | |
ce49c2fa | 61 | this._evaluateAnnotations(); |
efe0829a DV |
62 | }; |
63 | ||
64 | DygraphLayout.prototype._evaluateLimits = function() { | |
65 | this.minxval = this.maxxval = null; | |
f6401bf6 DV |
66 | if (this.options.dateWindow) { |
67 | this.minxval = this.options.dateWindow[0]; | |
68 | this.maxxval = this.options.dateWindow[1]; | |
69 | } else { | |
70 | for (var name in this.datasets) { | |
71 | if (!this.datasets.hasOwnProperty(name)) continue; | |
72 | var series = this.datasets[name]; | |
48841144 NN |
73 | if (series.length > 1) { |
74 | var x1 = series[0][0]; | |
75 | if (!this.minxval || x1 < this.minxval) this.minxval = x1; | |
76 | ||
77 | var x2 = series[series.length - 1][0]; | |
78 | if (!this.maxxval || x2 > this.maxxval) this.maxxval = x2; | |
79 | } | |
f6401bf6 | 80 | } |
efe0829a DV |
81 | } |
82 | this.xrange = this.maxxval - this.minxval; | |
83 | this.xscale = (this.xrange != 0 ? 1/this.xrange : 1.0); | |
84 | ||
ea4942ed DV |
85 | for (var i = 0; i < this.options.yAxes.length; i++) { |
86 | var axis = this.options.yAxes[i]; | |
26ca7938 DV |
87 | axis.minyval = axis.computedValueRange[0]; |
88 | axis.maxyval = axis.computedValueRange[1]; | |
ea4942ed DV |
89 | axis.yrange = axis.maxyval - axis.minyval; |
90 | axis.yscale = (axis.yrange != 0 ? 1.0 / axis.yrange : 1.0); | |
91 | } | |
efe0829a DV |
92 | }; |
93 | ||
94 | DygraphLayout.prototype._evaluateLineCharts = function() { | |
95 | // add all the rects | |
96 | this.points = new Array(); | |
97 | for (var setName in this.datasets) { | |
85b99f0b DV |
98 | if (!this.datasets.hasOwnProperty(setName)) continue; |
99 | ||
100 | var dataset = this.datasets[setName]; | |
ea4942ed DV |
101 | var axis = this.options.yAxes[this.options.seriesToAxisMap[setName]]; |
102 | ||
85b99f0b DV |
103 | for (var j = 0; j < dataset.length; j++) { |
104 | var item = dataset[j]; | |
105 | var point = { | |
ff00d3e2 | 106 | // TODO(danvk): here |
85b99f0b | 107 | x: ((parseFloat(item[0]) - this.minxval) * this.xscale), |
ea4942ed | 108 | y: 1.0 - ((parseFloat(item[1]) - axis.minyval) * axis.yscale), |
85b99f0b DV |
109 | xval: parseFloat(item[0]), |
110 | yval: parseFloat(item[1]), | |
111 | name: setName | |
112 | }; | |
113 | ||
1a26f3fb | 114 | this.points.push(point); |
85b99f0b | 115 | } |
efe0829a DV |
116 | } |
117 | }; | |
118 | ||
119 | DygraphLayout.prototype._evaluateLineTicks = function() { | |
120 | this.xticks = new Array(); | |
121 | for (var i = 0; i < this.options.xTicks.length; i++) { | |
122 | var tick = this.options.xTicks[i]; | |
123 | var label = tick.label; | |
124 | var pos = this.xscale * (tick.v - this.minxval); | |
125 | if ((pos >= 0.0) && (pos <= 1.0)) { | |
126 | this.xticks.push([pos, label]); | |
127 | } | |
128 | } | |
129 | ||
130 | this.yticks = new Array(); | |
9012dd21 | 131 | for (var i = 0; i < this.options.yAxes.length; i++ ) { |
67076b22 DV |
132 | var axis = this.options.yAxes[i]; |
133 | for (var j = 0; j < axis.ticks.length; j++) { | |
134 | var tick = axis.ticks[j]; | |
135 | var label = tick.label; | |
136 | var pos = 1.0 - (axis.yscale * (tick.v - axis.minyval)); | |
137 | if ((pos >= 0.0) && (pos <= 1.0)) { | |
9012dd21 | 138 | this.yticks.push([i, pos, label]); |
67076b22 | 139 | } |
efe0829a DV |
140 | } |
141 | } | |
142 | }; | |
143 | ||
6a1aa64f DV |
144 | |
145 | /** | |
146 | * Behaves the same way as PlotKit.Layout, but also copies the errors | |
147 | * @private | |
148 | */ | |
285a6bda | 149 | DygraphLayout.prototype.evaluateWithError = function() { |
6a1aa64f DV |
150 | this.evaluate(); |
151 | if (!this.options.errorBars) return; | |
152 | ||
153 | // Copy over the error terms | |
154 | var i = 0; // index in this.points | |
155 | for (var setName in this.datasets) { | |
85b99f0b DV |
156 | if (!this.datasets.hasOwnProperty(setName)) continue; |
157 | var j = 0; | |
158 | var dataset = this.datasets[setName]; | |
159 | for (var j = 0; j < dataset.length; j++, i++) { | |
160 | var item = dataset[j]; | |
161 | var xv = parseFloat(item[0]); | |
162 | var yv = parseFloat(item[1]); | |
163 | ||
164 | if (xv == this.points[i].xval && | |
165 | yv == this.points[i].yval) { | |
166 | this.points[i].errorMinus = parseFloat(item[2]); | |
167 | this.points[i].errorPlus = parseFloat(item[3]); | |
168 | } | |
169 | } | |
6a1aa64f DV |
170 | } |
171 | }; | |
172 | ||
ce49c2fa DV |
173 | DygraphLayout.prototype._evaluateAnnotations = function() { |
174 | // Add the annotations to the point to which they belong. | |
175 | // Make a map from (setName, xval) to annotation for quick lookups. | |
176 | var annotations = {}; | |
177 | for (var i = 0; i < this.annotations.length; i++) { | |
178 | var a = this.annotations[i]; | |
179 | annotations[a.xval + "," + a.series] = a; | |
180 | } | |
181 | ||
182 | this.annotated_points = []; | |
183 | for (var i = 0; i < this.points.length; i++) { | |
184 | var p = this.points[i]; | |
185 | var k = p.xval + "," + p.name; | |
186 | if (k in annotations) { | |
187 | p.annotation = annotations[k]; | |
188 | this.annotated_points.push(p); | |
189 | } | |
190 | } | |
191 | }; | |
192 | ||
6a1aa64f DV |
193 | /** |
194 | * Convenience function to remove all the data sets from a graph | |
195 | */ | |
285a6bda | 196 | DygraphLayout.prototype.removeAllDatasets = function() { |
6a1aa64f DV |
197 | delete this.datasets; |
198 | this.datasets = new Array(); | |
199 | }; | |
200 | ||
201 | /** | |
202 | * Change the values of various layout options | |
203 | * @param {Object} new_options an associative array of new properties | |
204 | */ | |
285a6bda | 205 | DygraphLayout.prototype.updateOptions = function(new_options) { |
fc80a396 | 206 | Dygraph.update(this.options, new_options ? new_options : {}); |
6a1aa64f DV |
207 | }; |
208 | ||
667d510b | 209 | /** |
210 | * Return a copy of the point at the indicated index, with its yval unstacked. | |
211 | * @param int index of point in layout_.points | |
212 | */ | |
8c03ba63 | 213 | DygraphLayout.prototype.unstackPointAtIndex = function(idx) { |
667d510b | 214 | var point = this.points[idx]; |
215 | ||
216 | // Clone the point since we modify it | |
217 | var unstackedPoint = {}; | |
218 | for (var i in point) { | |
219 | unstackedPoint[i] = point[i]; | |
220 | } | |
221 | ||
222 | if (!this.attr_("stackedGraph")) { | |
223 | return unstackedPoint; | |
224 | } | |
225 | ||
226 | // The unstacked yval is equal to the current yval minus the yval of the | |
227 | // next point at the same xval. | |
228 | for (var i = idx+1; i < this.points.length; i++) { | |
229 | if (this.points[i].xval == point.xval) { | |
230 | unstackedPoint.yval -= this.points[i].yval; | |
231 | break; | |
232 | } | |
233 | } | |
234 | ||
235 | return unstackedPoint; | |
236 | } | |
237 | ||
6a1aa64f DV |
238 | // Subclass PlotKit.CanvasRenderer to add: |
239 | // 1. X/Y grid overlay | |
240 | // 2. Ability to draw error bars (if required) | |
241 | ||
242 | /** | |
243 | * Sets some PlotKit.CanvasRenderer options | |
244 | * @param {Object} element The canvas to attach to | |
285a6bda | 245 | * @param {Layout} layout The DygraphLayout object for this graph. |
6a1aa64f DV |
246 | * @param {Object} options Options to pass on to CanvasRenderer |
247 | */ | |
9317362d DV |
248 | DygraphCanvasRenderer = function(dygraph, element, layout, options) { |
249 | // TODO(danvk): remove options, just use dygraph.attr_. | |
9317362d | 250 | this.dygraph_ = dygraph; |
fbe31dc8 DV |
251 | |
252 | // default options | |
253 | this.options = { | |
f474c2a3 DV |
254 | "strokeWidth": 0.5, |
255 | "drawXAxis": true, | |
256 | "drawYAxis": true, | |
257 | "axisLineColor": "black", | |
258 | "axisLineWidth": 0.5, | |
259 | "axisTickSize": 3, | |
260 | "axisLabelColor": "black", | |
261 | "axisLabelFont": "Arial", | |
262 | "axisLabelFontSize": 9, | |
263 | "axisLabelWidth": 50, | |
264 | "drawYGrid": true, | |
265 | "drawXGrid": true, | |
43af96e7 | 266 | "gridLineColor": "rgb(128,128,128)", |
e7746234 EC |
267 | "fillAlpha": 0.15, |
268 | "underlayCallback": null | |
fbe31dc8 | 269 | }; |
fc80a396 | 270 | Dygraph.update(this.options, options); |
6a1aa64f | 271 | |
fbe31dc8 | 272 | this.layout = layout; |
b0c3b730 | 273 | this.element = element; |
fbe31dc8 DV |
274 | this.container = this.element.parentNode; |
275 | ||
fbe31dc8 DV |
276 | this.height = this.element.height; |
277 | this.width = this.element.width; | |
278 | ||
279 | // --- check whether everything is ok before we return | |
280 | if (!this.isIE && !(DygraphCanvasRenderer.isSupported(this.element))) | |
281 | throw "Canvas is not supported."; | |
282 | ||
283 | // internal state | |
284 | this.xlabels = new Array(); | |
285 | this.ylabels = new Array(); | |
ce49c2fa | 286 | this.annotations = new Array(); |
fbe31dc8 | 287 | |
ea4942ed | 288 | // TODO(danvk): consider all axes in this computation. |
fbe31dc8 | 289 | this.area = { |
9012dd21 | 290 | // TODO(danvk): per-axis setting. |
fbe31dc8 DV |
291 | x: this.options.yAxisLabelWidth + 2 * this.options.axisTickSize, |
292 | y: 0 | |
293 | }; | |
294 | this.area.w = this.width - this.area.x - this.options.rightGap; | |
295 | this.area.h = this.height - this.options.axisLabelFontSize - | |
296 | 2 * this.options.axisTickSize; | |
297 | ||
26ca7938 DV |
298 | // Shrink the drawing area to accomodate additional y-axes. |
299 | if (this.dygraph_.numAxes() == 2) { | |
300 | // TODO(danvk): per-axis setting. | |
301 | this.area.w -= (this.options.yAxisLabelWidth + 2 * this.options.axisTickSize); | |
302 | } else if (this.dygraph_.numAxes() > 2) { | |
303 | this.dygraph_.error("Only two y-axes are supported at this time. (Trying " + | |
34de8b76 | 304 | "to use " + this.dygraph_.numAxes() + ")"); |
26ca7938 DV |
305 | } |
306 | ||
b0c3b730 DV |
307 | this.container.style.position = "relative"; |
308 | this.container.style.width = this.width + "px"; | |
26ca7938 DV |
309 | |
310 | // Set up a clipping area for the canvas (and the interaction canvas). | |
311 | // This ensures that we don't overdraw. | |
312 | var ctx = this.element.getContext("2d"); | |
313 | ctx.beginPath(); | |
314 | ctx.rect(this.area.x, this.area.y, this.area.w, this.area.h); | |
315 | ctx.clip(); | |
316 | ||
317 | var ctx = this.dygraph_.hidden_.getContext("2d"); | |
318 | ctx.beginPath(); | |
319 | ctx.rect(this.area.x, this.area.y, this.area.w, this.area.h); | |
320 | ctx.clip(); | |
fbe31dc8 DV |
321 | }; |
322 | ||
323 | DygraphCanvasRenderer.prototype.clear = function() { | |
324 | if (this.isIE) { | |
325 | // VML takes a while to start up, so we just poll every this.IEDelay | |
326 | try { | |
327 | if (this.clearDelay) { | |
328 | this.clearDelay.cancel(); | |
329 | this.clearDelay = null; | |
330 | } | |
331 | var context = this.element.getContext("2d"); | |
332 | } | |
333 | catch (e) { | |
76171648 | 334 | // TODO(danvk): this is broken, since MochiKit.Async is gone. |
fbe31dc8 DV |
335 | this.clearDelay = MochiKit.Async.wait(this.IEDelay); |
336 | this.clearDelay.addCallback(bind(this.clear, this)); | |
337 | return; | |
338 | } | |
339 | } | |
340 | ||
341 | var context = this.element.getContext("2d"); | |
342 | context.clearRect(0, 0, this.width, this.height); | |
343 | ||
2160ed4a | 344 | for (var i = 0; i < this.xlabels.length; i++) { |
b0c3b730 DV |
345 | var el = this.xlabels[i]; |
346 | el.parentNode.removeChild(el); | |
2160ed4a DV |
347 | } |
348 | for (var i = 0; i < this.ylabels.length; i++) { | |
b0c3b730 DV |
349 | var el = this.ylabels[i]; |
350 | el.parentNode.removeChild(el); | |
2160ed4a | 351 | } |
ce49c2fa DV |
352 | for (var i = 0; i < this.annotations.length; i++) { |
353 | var el = this.annotations[i]; | |
354 | el.parentNode.removeChild(el); | |
355 | } | |
fbe31dc8 DV |
356 | this.xlabels = new Array(); |
357 | this.ylabels = new Array(); | |
ce49c2fa | 358 | this.annotations = new Array(); |
fbe31dc8 DV |
359 | }; |
360 | ||
361 | ||
362 | DygraphCanvasRenderer.isSupported = function(canvasName) { | |
363 | var canvas = null; | |
364 | try { | |
21d3323f | 365 | if (typeof(canvasName) == 'undefined' || canvasName == null) |
b0c3b730 | 366 | canvas = document.createElement("canvas"); |
fbe31dc8 | 367 | else |
b0c3b730 | 368 | canvas = canvasName; |
fbe31dc8 DV |
369 | var context = canvas.getContext("2d"); |
370 | } | |
371 | catch (e) { | |
372 | var ie = navigator.appVersion.match(/MSIE (\d\.\d)/); | |
373 | var opera = (navigator.userAgent.toLowerCase().indexOf("opera") != -1); | |
374 | if ((!ie) || (ie[1] < 6) || (opera)) | |
375 | return false; | |
376 | return true; | |
377 | } | |
378 | return true; | |
6a1aa64f | 379 | }; |
6a1aa64f DV |
380 | |
381 | /** | |
382 | * Draw an X/Y grid on top of the existing plot | |
383 | */ | |
285a6bda | 384 | DygraphCanvasRenderer.prototype.render = function() { |
6a1aa64f DV |
385 | // Draw the new X/Y grid |
386 | var ctx = this.element.getContext("2d"); | |
e7746234 EC |
387 | |
388 | if (this.options.underlayCallback) { | |
d9e6fa47 | 389 | this.options.underlayCallback(ctx, this.area, this.layout, this.dygraph_); |
e7746234 EC |
390 | } |
391 | ||
6a1aa64f DV |
392 | if (this.options.drawYGrid) { |
393 | var ticks = this.layout.yticks; | |
394 | ctx.save(); | |
f2f24402 | 395 | ctx.strokeStyle = this.options.gridLineColor; |
6a1aa64f DV |
396 | ctx.lineWidth = this.options.axisLineWidth; |
397 | for (var i = 0; i < ticks.length; i++) { | |
880a574f DV |
398 | // TODO(danvk): allow secondary axes to draw a grid, too. |
399 | if (ticks[i][0] != 0) continue; | |
6a1aa64f | 400 | var x = this.area.x; |
9012dd21 | 401 | var y = this.area.y + ticks[i][1] * this.area.h; |
6a1aa64f DV |
402 | ctx.beginPath(); |
403 | ctx.moveTo(x, y); | |
404 | ctx.lineTo(x + this.area.w, y); | |
405 | ctx.closePath(); | |
406 | ctx.stroke(); | |
407 | } | |
408 | } | |
409 | ||
410 | if (this.options.drawXGrid) { | |
411 | var ticks = this.layout.xticks; | |
412 | ctx.save(); | |
f2f24402 | 413 | ctx.strokeStyle = this.options.gridLineColor; |
6a1aa64f DV |
414 | ctx.lineWidth = this.options.axisLineWidth; |
415 | for (var i=0; i<ticks.length; i++) { | |
880a574f | 416 | var x = this.area.x + ticks[i][0] * this.area.w; |
6a1aa64f DV |
417 | var y = this.area.y + this.area.h; |
418 | ctx.beginPath(); | |
880a574f | 419 | ctx.moveTo(x, y); |
6a1aa64f DV |
420 | ctx.lineTo(x, this.area.y); |
421 | ctx.closePath(); | |
422 | ctx.stroke(); | |
423 | } | |
424 | } | |
2ce09b19 DV |
425 | |
426 | // Do the ordinary rendering, as before | |
2ce09b19 | 427 | this._renderLineChart(); |
fbe31dc8 | 428 | this._renderAxis(); |
ce49c2fa | 429 | this._renderAnnotations(); |
fbe31dc8 DV |
430 | }; |
431 | ||
432 | ||
433 | DygraphCanvasRenderer.prototype._renderAxis = function() { | |
434 | if (!this.options.drawXAxis && !this.options.drawYAxis) | |
435 | return; | |
436 | ||
437 | var context = this.element.getContext("2d"); | |
438 | ||
34fedff8 DV |
439 | var labelStyle = { |
440 | "position": "absolute", | |
441 | "fontSize": this.options.axisLabelFontSize + "px", | |
442 | "zIndex": 10, | |
f474c2a3 | 443 | "color": this.options.axisLabelColor, |
34fedff8 DV |
444 | "width": this.options.axisLabelWidth + "px", |
445 | "overflow": "hidden" | |
446 | }; | |
447 | var makeDiv = function(txt) { | |
448 | var div = document.createElement("div"); | |
449 | for (var name in labelStyle) { | |
85b99f0b DV |
450 | if (labelStyle.hasOwnProperty(name)) { |
451 | div.style[name] = labelStyle[name]; | |
452 | } | |
fbe31dc8 | 453 | } |
34fedff8 DV |
454 | div.appendChild(document.createTextNode(txt)); |
455 | return div; | |
fbe31dc8 DV |
456 | }; |
457 | ||
458 | // axis lines | |
459 | context.save(); | |
f474c2a3 | 460 | context.strokeStyle = this.options.axisLineColor; |
fbe31dc8 DV |
461 | context.lineWidth = this.options.axisLineWidth; |
462 | ||
fbe31dc8 | 463 | if (this.options.drawYAxis) { |
8b7a0cc3 | 464 | if (this.layout.yticks && this.layout.yticks.length > 0) { |
2160ed4a DV |
465 | for (var i = 0; i < this.layout.yticks.length; i++) { |
466 | var tick = this.layout.yticks[i]; | |
fbe31dc8 DV |
467 | if (typeof(tick) == "function") return; |
468 | var x = this.area.x; | |
880a574f DV |
469 | var sgn = 1; |
470 | if (tick[0] == 1) { // right-side y-axis | |
471 | x = this.area.x + this.area.w; | |
472 | sgn = -1; | |
9012dd21 DV |
473 | } |
474 | var y = this.area.y + tick[1] * this.area.h; | |
fbe31dc8 DV |
475 | context.beginPath(); |
476 | context.moveTo(x, y); | |
880a574f | 477 | context.lineTo(x - sgn * this.options.axisTickSize, y); |
fbe31dc8 DV |
478 | context.closePath(); |
479 | context.stroke(); | |
480 | ||
9012dd21 | 481 | var label = makeDiv(tick[2]); |
fbe31dc8 DV |
482 | var top = (y - this.options.axisLabelFontSize / 2); |
483 | if (top < 0) top = 0; | |
484 | ||
485 | if (top + this.options.axisLabelFontSize + 3 > this.height) { | |
486 | label.style.bottom = "0px"; | |
487 | } else { | |
488 | label.style.top = top + "px"; | |
489 | } | |
9012dd21 DV |
490 | if (tick[0] == 0) { |
491 | label.style.left = "0px"; | |
492 | label.style.textAlign = "right"; | |
493 | } else if (tick[0] == 1) { | |
494 | label.style.left = (this.area.x + this.area.w + | |
495 | this.options.axisTickSize) + "px"; | |
496 | label.style.textAlign = "left"; | |
497 | } | |
fbe31dc8 | 498 | label.style.width = this.options.yAxisLabelWidth + "px"; |
b0c3b730 | 499 | this.container.appendChild(label); |
fbe31dc8 | 500 | this.ylabels.push(label); |
2160ed4a | 501 | } |
fbe31dc8 DV |
502 | |
503 | // The lowest tick on the y-axis often overlaps with the leftmost | |
504 | // tick on the x-axis. Shift the bottom tick up a little bit to | |
505 | // compensate if necessary. | |
506 | var bottomTick = this.ylabels[0]; | |
507 | var fontSize = this.options.axisLabelFontSize; | |
508 | var bottom = parseInt(bottomTick.style.top) + fontSize; | |
509 | if (bottom > this.height - fontSize) { | |
510 | bottomTick.style.top = (parseInt(bottomTick.style.top) - | |
511 | fontSize / 2) + "px"; | |
512 | } | |
513 | } | |
514 | ||
515 | context.beginPath(); | |
516 | context.moveTo(this.area.x, this.area.y); | |
517 | context.lineTo(this.area.x, this.area.y + this.area.h); | |
518 | context.closePath(); | |
519 | context.stroke(); | |
c1dbeb10 DV |
520 | |
521 | if (this.dygraph_.numAxes() == 2) { | |
522 | context.beginPath(); | |
523 | context.moveTo(this.area.x + this.area.w, this.area.y); | |
524 | context.lineTo(this.area.x + this.area.w, this.area.y + this.area.h); | |
525 | context.closePath(); | |
526 | context.stroke(); | |
527 | } | |
fbe31dc8 DV |
528 | } |
529 | ||
530 | if (this.options.drawXAxis) { | |
531 | if (this.layout.xticks) { | |
2160ed4a DV |
532 | for (var i = 0; i < this.layout.xticks.length; i++) { |
533 | var tick = this.layout.xticks[i]; | |
fbe31dc8 DV |
534 | if (typeof(dataset) == "function") return; |
535 | ||
536 | var x = this.area.x + tick[0] * this.area.w; | |
537 | var y = this.area.y + this.area.h; | |
538 | context.beginPath(); | |
539 | context.moveTo(x, y); | |
540 | context.lineTo(x, y + this.options.axisTickSize); | |
541 | context.closePath(); | |
542 | context.stroke(); | |
543 | ||
34fedff8 | 544 | var label = makeDiv(tick[1]); |
fbe31dc8 DV |
545 | label.style.textAlign = "center"; |
546 | label.style.bottom = "0px"; | |
547 | ||
548 | var left = (x - this.options.axisLabelWidth/2); | |
549 | if (left + this.options.axisLabelWidth > this.width) { | |
550 | left = this.width - this.options.xAxisLabelWidth; | |
551 | label.style.textAlign = "right"; | |
552 | } | |
553 | if (left < 0) { | |
554 | left = 0; | |
555 | label.style.textAlign = "left"; | |
556 | } | |
557 | ||
558 | label.style.left = left + "px"; | |
559 | label.style.width = this.options.xAxisLabelWidth + "px"; | |
b0c3b730 | 560 | this.container.appendChild(label); |
fbe31dc8 | 561 | this.xlabels.push(label); |
2160ed4a | 562 | } |
fbe31dc8 DV |
563 | } |
564 | ||
565 | context.beginPath(); | |
566 | context.moveTo(this.area.x, this.area.y + this.area.h); | |
567 | context.lineTo(this.area.x + this.area.w, this.area.y + this.area.h); | |
568 | context.closePath(); | |
569 | context.stroke(); | |
570 | } | |
571 | ||
572 | context.restore(); | |
6a1aa64f DV |
573 | }; |
574 | ||
fbe31dc8 | 575 | |
ce49c2fa DV |
576 | DygraphCanvasRenderer.prototype._renderAnnotations = function() { |
577 | var annotationStyle = { | |
578 | "position": "absolute", | |
579 | "fontSize": this.options.axisLabelFontSize + "px", | |
580 | "zIndex": 10, | |
3bf2fa91 | 581 | "overflow": "hidden" |
ce49c2fa DV |
582 | }; |
583 | ||
ab5e5c75 DV |
584 | var bindEvt = function(eventName, classEventName, p, self) { |
585 | return function(e) { | |
586 | var a = p.annotation; | |
587 | if (a.hasOwnProperty(eventName)) { | |
588 | a[eventName](a, p, self.dygraph_, e); | |
589 | } else if (self.dygraph_.attr_(classEventName)) { | |
590 | self.dygraph_.attr_(classEventName)(a, p, self.dygraph_,e ); | |
591 | } | |
592 | }; | |
593 | } | |
594 | ||
ce49c2fa DV |
595 | // Get a list of point with annotations. |
596 | var points = this.layout.annotated_points; | |
597 | for (var i = 0; i < points.length; i++) { | |
598 | var p = points[i]; | |
e6d53148 DV |
599 | if (p.canvasx < this.area.x || p.canvasx > this.area.x + this.area.w) { |
600 | continue; | |
601 | } | |
602 | ||
ce5e8d36 DV |
603 | var a = p.annotation; |
604 | var tick_height = 6; | |
605 | if (a.hasOwnProperty("tickHeight")) { | |
606 | tick_height = a.tickHeight; | |
9a40897e DV |
607 | } |
608 | ||
ce49c2fa DV |
609 | var div = document.createElement("div"); |
610 | for (var name in annotationStyle) { | |
611 | if (annotationStyle.hasOwnProperty(name)) { | |
612 | div.style[name] = annotationStyle[name]; | |
613 | } | |
614 | } | |
ce5e8d36 DV |
615 | if (!a.hasOwnProperty('icon')) { |
616 | div.className = "dygraphDefaultAnnotation"; | |
617 | } | |
618 | if (a.hasOwnProperty('cssClass')) { | |
619 | div.className += " " + a.cssClass; | |
620 | } | |
621 | ||
a5ad69cc DV |
622 | var width = a.hasOwnProperty('width') ? a.width : 16; |
623 | var height = a.hasOwnProperty('height') ? a.height : 16; | |
ce5e8d36 DV |
624 | if (a.hasOwnProperty('icon')) { |
625 | var img = document.createElement("img"); | |
626 | img.src = a.icon; | |
33030f33 DV |
627 | img.width = width; |
628 | img.height = height; | |
ce5e8d36 DV |
629 | div.appendChild(img); |
630 | } else if (p.annotation.hasOwnProperty('shortText')) { | |
631 | div.appendChild(document.createTextNode(p.annotation.shortText)); | |
5c528fa2 | 632 | } |
ce5e8d36 | 633 | div.style.left = (p.canvasx - width / 2) + "px"; |
d14b9eed DV |
634 | if (a.attachAtBottom) { |
635 | div.style.top = (this.area.h - height - tick_height) + "px"; | |
636 | } else { | |
637 | div.style.top = (p.canvasy - height - tick_height) + "px"; | |
638 | } | |
ce5e8d36 DV |
639 | div.style.width = width + "px"; |
640 | div.style.height = height + "px"; | |
ce49c2fa DV |
641 | div.title = p.annotation.text; |
642 | div.style.color = this.colors[p.name]; | |
643 | div.style.borderColor = this.colors[p.name]; | |
e6d53148 | 644 | a.div = div; |
ab5e5c75 | 645 | |
9a40897e DV |
646 | Dygraph.addEvent(div, 'click', |
647 | bindEvt('clickHandler', 'annotationClickHandler', p, this)); | |
648 | Dygraph.addEvent(div, 'mouseover', | |
649 | bindEvt('mouseOverHandler', 'annotationMouseOverHandler', p, this)); | |
650 | Dygraph.addEvent(div, 'mouseout', | |
651 | bindEvt('mouseOutHandler', 'annotationMouseOutHandler', p, this)); | |
652 | Dygraph.addEvent(div, 'dblclick', | |
653 | bindEvt('dblClickHandler', 'annotationDblClickHandler', p, this)); | |
ab5e5c75 | 654 | |
ce49c2fa DV |
655 | this.container.appendChild(div); |
656 | this.annotations.push(div); | |
9a40897e DV |
657 | |
658 | var ctx = this.element.getContext("2d"); | |
659 | ctx.strokeStyle = this.colors[p.name]; | |
660 | ctx.beginPath(); | |
d14b9eed DV |
661 | if (!a.attachAtBottom) { |
662 | ctx.moveTo(p.canvasx, p.canvasy); | |
663 | ctx.lineTo(p.canvasx, p.canvasy - 2 - tick_height); | |
664 | } else { | |
665 | ctx.moveTo(p.canvasx, this.area.h); | |
666 | ctx.lineTo(p.canvasx, this.area.h - 2 - tick_height); | |
667 | } | |
9a40897e DV |
668 | ctx.closePath(); |
669 | ctx.stroke(); | |
ce49c2fa DV |
670 | } |
671 | }; | |
672 | ||
673 | ||
6a1aa64f DV |
674 | /** |
675 | * Overrides the CanvasRenderer method to draw error bars | |
676 | */ | |
285a6bda | 677 | DygraphCanvasRenderer.prototype._renderLineChart = function() { |
6a1aa64f DV |
678 | var context = this.element.getContext("2d"); |
679 | var colorCount = this.options.colorScheme.length; | |
680 | var colorScheme = this.options.colorScheme; | |
43af96e7 | 681 | var fillAlpha = this.options.fillAlpha; |
6a1aa64f | 682 | var errorBars = this.layout.options.errorBars; |
5954ef32 | 683 | var fillGraph = this.layout.options.fillGraph; |
354e15ab | 684 | var stackedGraph = this.layout.options.stackedGraph; |
afdc483f | 685 | var stepPlot = this.layout.options.stepPlot; |
21d3323f DV |
686 | |
687 | var setNames = []; | |
ca43052c | 688 | for (var name in this.layout.datasets) { |
85b99f0b DV |
689 | if (this.layout.datasets.hasOwnProperty(name)) { |
690 | setNames.push(name); | |
691 | } | |
ca43052c | 692 | } |
21d3323f | 693 | var setCount = setNames.length; |
6a1aa64f | 694 | |
f032c51d AV |
695 | this.colors = {} |
696 | for (var i = 0; i < setCount; i++) { | |
697 | this.colors[setNames[i]] = colorScheme[i % colorCount]; | |
698 | } | |
699 | ||
ff00d3e2 DV |
700 | // Update Points |
701 | // TODO(danvk): here | |
2160ed4a DV |
702 | for (var i = 0; i < this.layout.points.length; i++) { |
703 | var point = this.layout.points[i]; | |
6a1aa64f DV |
704 | point.canvasx = this.area.w * point.x + this.area.x; |
705 | point.canvasy = this.area.h * point.y + this.area.y; | |
706 | } | |
6a1aa64f DV |
707 | |
708 | // create paths | |
9317362d | 709 | var isOK = function(x) { return x && !isNaN(x); }; |
6a1aa64f | 710 | |
80aaae18 DV |
711 | var ctx = context; |
712 | if (errorBars) { | |
6a834bbb DV |
713 | if (fillGraph) { |
714 | this.dygraph_.warn("Can't use fillGraph option with error bars"); | |
715 | } | |
716 | ||
6a1aa64f DV |
717 | for (var i = 0; i < setCount; i++) { |
718 | var setName = setNames[i]; | |
ea4942ed DV |
719 | var axis = this.layout.options.yAxes[ |
720 | this.layout.options.seriesToAxisMap[setName]]; | |
f032c51d | 721 | var color = this.colors[setName]; |
6a1aa64f DV |
722 | |
723 | // setup graphics context | |
80aaae18 | 724 | ctx.save(); |
56623f3b | 725 | var prevX = NaN; |
afdc483f | 726 | var prevY = NaN; |
6a1aa64f | 727 | var prevYs = [-1, -1]; |
ea4942ed | 728 | var yscale = axis.yscale; |
f474c2a3 DV |
729 | // should be same color as the lines but only 15% opaque. |
730 | var rgb = new RGBColor(color); | |
43af96e7 NK |
731 | var err_color = 'rgba(' + rgb.r + ',' + rgb.g + ',' + rgb.b + ',' + |
732 | fillAlpha + ')'; | |
f474c2a3 | 733 | ctx.fillStyle = err_color; |
05c9d0c4 DV |
734 | ctx.beginPath(); |
735 | for (var j = 0; j < this.layout.points.length; j++) { | |
736 | var point = this.layout.points[j]; | |
6a1aa64f | 737 | if (point.name == setName) { |
5954ef32 | 738 | if (!isOK(point.y)) { |
56623f3b | 739 | prevX = NaN; |
ae85914a | 740 | continue; |
5011e7a1 | 741 | } |
ce49c2fa | 742 | |
ff00d3e2 | 743 | // TODO(danvk): here |
afdc483f NN |
744 | if (stepPlot) { |
745 | var newYs = [ prevY - point.errorPlus * yscale, | |
47600757 | 746 | prevY + point.errorMinus * yscale ]; |
afdc483f NN |
747 | prevY = point.y; |
748 | } else { | |
749 | var newYs = [ point.y - point.errorPlus * yscale, | |
47600757 | 750 | point.y + point.errorMinus * yscale ]; |
afdc483f | 751 | } |
6a1aa64f DV |
752 | newYs[0] = this.area.h * newYs[0] + this.area.y; |
753 | newYs[1] = this.area.h * newYs[1] + this.area.y; | |
56623f3b | 754 | if (!isNaN(prevX)) { |
afdc483f | 755 | if (stepPlot) { |
47600757 | 756 | ctx.moveTo(prevX, newYs[0]); |
afdc483f | 757 | } else { |
47600757 | 758 | ctx.moveTo(prevX, prevYs[0]); |
afdc483f | 759 | } |
5954ef32 DV |
760 | ctx.lineTo(point.canvasx, newYs[0]); |
761 | ctx.lineTo(point.canvasx, newYs[1]); | |
afdc483f | 762 | if (stepPlot) { |
47600757 | 763 | ctx.lineTo(prevX, newYs[1]); |
afdc483f | 764 | } else { |
47600757 | 765 | ctx.lineTo(prevX, prevYs[1]); |
afdc483f | 766 | } |
5954ef32 DV |
767 | ctx.closePath(); |
768 | } | |
354e15ab | 769 | prevYs = newYs; |
5954ef32 DV |
770 | prevX = point.canvasx; |
771 | } | |
772 | } | |
773 | ctx.fill(); | |
774 | } | |
775 | } else if (fillGraph) { | |
354e15ab DE |
776 | var baseline = [] // for stacked graphs: baseline for filling |
777 | ||
778 | // process sets in reverse order (needed for stacked graphs) | |
779 | for (var i = setCount - 1; i >= 0; i--) { | |
5954ef32 | 780 | var setName = setNames[i]; |
f032c51d | 781 | var color = this.colors[setName]; |
ea4942ed DV |
782 | var axis = this.layout.options.yAxes[ |
783 | this.layout.options.seriesToAxisMap[setName]]; | |
784 | var axisY = 1.0 + axis.minyval * axis.yscale; | |
785 | if (axisY < 0.0) axisY = 0.0; | |
786 | else if (axisY > 1.0) axisY = 1.0; | |
787 | axisY = this.area.h * axisY + this.area.y; | |
5954ef32 DV |
788 | |
789 | // setup graphics context | |
790 | ctx.save(); | |
56623f3b | 791 | var prevX = NaN; |
5954ef32 | 792 | var prevYs = [-1, -1]; |
ea4942ed | 793 | var yscale = axis.yscale; |
5954ef32 DV |
794 | // should be same color as the lines but only 15% opaque. |
795 | var rgb = new RGBColor(color); | |
43af96e7 NK |
796 | var err_color = 'rgba(' + rgb.r + ',' + rgb.g + ',' + rgb.b + ',' + |
797 | fillAlpha + ')'; | |
5954ef32 DV |
798 | ctx.fillStyle = err_color; |
799 | ctx.beginPath(); | |
800 | for (var j = 0; j < this.layout.points.length; j++) { | |
801 | var point = this.layout.points[j]; | |
5954ef32 DV |
802 | if (point.name == setName) { |
803 | if (!isOK(point.y)) { | |
56623f3b | 804 | prevX = NaN; |
5954ef32 DV |
805 | continue; |
806 | } | |
354e15ab DE |
807 | var newYs; |
808 | if (stackedGraph) { | |
809 | lastY = baseline[point.canvasx]; | |
810 | if (lastY === undefined) lastY = axisY; | |
811 | baseline[point.canvasx] = point.canvasy; | |
812 | newYs = [ point.canvasy, lastY ]; | |
813 | } else { | |
814 | newYs = [ point.canvasy, axisY ]; | |
815 | } | |
56623f3b | 816 | if (!isNaN(prevX)) { |
05c9d0c4 | 817 | ctx.moveTo(prevX, prevYs[0]); |
afdc483f | 818 | if (stepPlot) { |
47600757 | 819 | ctx.lineTo(point.canvasx, prevYs[0]); |
afdc483f | 820 | } else { |
47600757 | 821 | ctx.lineTo(point.canvasx, newYs[0]); |
afdc483f | 822 | } |
05c9d0c4 DV |
823 | ctx.lineTo(point.canvasx, newYs[1]); |
824 | ctx.lineTo(prevX, prevYs[1]); | |
825 | ctx.closePath(); | |
6a1aa64f | 826 | } |
354e15ab | 827 | prevYs = newYs; |
6a1aa64f DV |
828 | prevX = point.canvasx; |
829 | } | |
05c9d0c4 | 830 | } |
6a1aa64f DV |
831 | ctx.fill(); |
832 | } | |
80aaae18 DV |
833 | } |
834 | ||
835 | for (var i = 0; i < setCount; i++) { | |
836 | var setName = setNames[i]; | |
f032c51d | 837 | var color = this.colors[setName]; |
227b93cc | 838 | var strokeWidth = this.dygraph_.attr_("strokeWidth", setName); |
80aaae18 DV |
839 | |
840 | // setup graphics context | |
841 | context.save(); | |
842 | var point = this.layout.points[0]; | |
227b93cc | 843 | var pointSize = this.dygraph_.attr_("pointSize", setName); |
80aaae18 | 844 | var prevX = null, prevY = null; |
227b93cc | 845 | var drawPoints = this.dygraph_.attr_("drawPoints", setName); |
80aaae18 DV |
846 | var points = this.layout.points; |
847 | for (var j = 0; j < points.length; j++) { | |
848 | var point = points[j]; | |
849 | if (point.name == setName) { | |
850 | if (!isOK(point.canvasy)) { | |
5d13ef68 | 851 | if (stepPlot && prevX != null) { |
0599d13b NN |
852 | // Draw a horizontal line to the start of the missing data |
853 | ctx.beginPath(); | |
854 | ctx.strokeStyle = color; | |
855 | ctx.lineWidth = this.options.strokeWidth; | |
856 | ctx.moveTo(prevX, prevY); | |
857 | ctx.lineTo(point.canvasx, prevY); | |
858 | ctx.stroke(); | |
859 | } | |
80aaae18 DV |
860 | // this will make us move to the next point, not draw a line to it. |
861 | prevX = prevY = null; | |
862 | } else { | |
863 | // A point is "isolated" if it is non-null but both the previous | |
864 | // and next points are null. | |
865 | var isIsolated = (!prevX && (j == points.length - 1 || | |
866 | !isOK(points[j+1].canvasy))); | |
867 | ||
868 | if (!prevX) { | |
869 | prevX = point.canvasx; | |
870 | prevY = point.canvasy; | |
871 | } else { | |
46dde5f9 DV |
872 | // TODO(danvk): figure out why this conditional is necessary. |
873 | if (strokeWidth) { | |
874 | ctx.beginPath(); | |
875 | ctx.strokeStyle = color; | |
876 | ctx.lineWidth = strokeWidth; | |
877 | ctx.moveTo(prevX, prevY); | |
878 | if (stepPlot) { | |
879 | ctx.lineTo(point.canvasx, prevY); | |
880 | } | |
881 | prevX = point.canvasx; | |
882 | prevY = point.canvasy; | |
883 | ctx.lineTo(prevX, prevY); | |
884 | ctx.stroke(); | |
afdc483f | 885 | } |
80aaae18 DV |
886 | } |
887 | ||
888 | if (drawPoints || isIsolated) { | |
889 | ctx.beginPath(); | |
890 | ctx.fillStyle = color; | |
7bf6a9fe DV |
891 | ctx.arc(point.canvasx, point.canvasy, pointSize, |
892 | 0, 2 * Math.PI, false); | |
80aaae18 DV |
893 | ctx.fill(); |
894 | } | |
895 | } | |
896 | } | |
897 | } | |
898 | } | |
6a1aa64f | 899 | |
6a1aa64f DV |
900 | context.restore(); |
901 | }; |