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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. | |
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 | ||
114 | // limit the x, y values so they do not overdraw | |
115 | if (point.y <= 0.0) { | |
116 | point.y = 0.0; | |
117 | } | |
118 | if (point.y >= 1.0) { | |
119 | point.y = 1.0; | |
120 | } | |
1a26f3fb | 121 | this.points.push(point); |
85b99f0b | 122 | } |
efe0829a DV |
123 | } |
124 | }; | |
125 | ||
126 | DygraphLayout.prototype._evaluateLineTicks = function() { | |
127 | this.xticks = new Array(); | |
128 | for (var i = 0; i < this.options.xTicks.length; i++) { | |
129 | var tick = this.options.xTicks[i]; | |
130 | var label = tick.label; | |
131 | var pos = this.xscale * (tick.v - this.minxval); | |
132 | if ((pos >= 0.0) && (pos <= 1.0)) { | |
133 | this.xticks.push([pos, label]); | |
134 | } | |
135 | } | |
136 | ||
137 | this.yticks = new Array(); | |
9012dd21 | 138 | for (var i = 0; i < this.options.yAxes.length; i++ ) { |
67076b22 DV |
139 | var axis = this.options.yAxes[i]; |
140 | for (var j = 0; j < axis.ticks.length; j++) { | |
141 | var tick = axis.ticks[j]; | |
142 | var label = tick.label; | |
143 | var pos = 1.0 - (axis.yscale * (tick.v - axis.minyval)); | |
144 | if ((pos >= 0.0) && (pos <= 1.0)) { | |
9012dd21 | 145 | this.yticks.push([i, pos, label]); |
67076b22 | 146 | } |
efe0829a DV |
147 | } |
148 | } | |
149 | }; | |
150 | ||
6a1aa64f DV |
151 | |
152 | /** | |
153 | * Behaves the same way as PlotKit.Layout, but also copies the errors | |
154 | * @private | |
155 | */ | |
285a6bda | 156 | DygraphLayout.prototype.evaluateWithError = function() { |
6a1aa64f DV |
157 | this.evaluate(); |
158 | if (!this.options.errorBars) return; | |
159 | ||
160 | // Copy over the error terms | |
161 | var i = 0; // index in this.points | |
162 | for (var setName in this.datasets) { | |
85b99f0b DV |
163 | if (!this.datasets.hasOwnProperty(setName)) continue; |
164 | var j = 0; | |
165 | var dataset = this.datasets[setName]; | |
166 | for (var j = 0; j < dataset.length; j++, i++) { | |
167 | var item = dataset[j]; | |
168 | var xv = parseFloat(item[0]); | |
169 | var yv = parseFloat(item[1]); | |
170 | ||
171 | if (xv == this.points[i].xval && | |
172 | yv == this.points[i].yval) { | |
173 | this.points[i].errorMinus = parseFloat(item[2]); | |
174 | this.points[i].errorPlus = parseFloat(item[3]); | |
175 | } | |
176 | } | |
6a1aa64f DV |
177 | } |
178 | }; | |
179 | ||
ce49c2fa DV |
180 | DygraphLayout.prototype._evaluateAnnotations = function() { |
181 | // Add the annotations to the point to which they belong. | |
182 | // Make a map from (setName, xval) to annotation for quick lookups. | |
183 | var annotations = {}; | |
184 | for (var i = 0; i < this.annotations.length; i++) { | |
185 | var a = this.annotations[i]; | |
186 | annotations[a.xval + "," + a.series] = a; | |
187 | } | |
188 | ||
189 | this.annotated_points = []; | |
190 | for (var i = 0; i < this.points.length; i++) { | |
191 | var p = this.points[i]; | |
192 | var k = p.xval + "," + p.name; | |
193 | if (k in annotations) { | |
194 | p.annotation = annotations[k]; | |
195 | this.annotated_points.push(p); | |
196 | } | |
197 | } | |
198 | }; | |
199 | ||
6a1aa64f DV |
200 | /** |
201 | * Convenience function to remove all the data sets from a graph | |
202 | */ | |
285a6bda | 203 | DygraphLayout.prototype.removeAllDatasets = function() { |
6a1aa64f DV |
204 | delete this.datasets; |
205 | this.datasets = new Array(); | |
206 | }; | |
207 | ||
208 | /** | |
209 | * Change the values of various layout options | |
210 | * @param {Object} new_options an associative array of new properties | |
211 | */ | |
285a6bda | 212 | DygraphLayout.prototype.updateOptions = function(new_options) { |
fc80a396 | 213 | Dygraph.update(this.options, new_options ? new_options : {}); |
6a1aa64f DV |
214 | }; |
215 | ||
667d510b | 216 | /** |
217 | * Return a copy of the point at the indicated index, with its yval unstacked. | |
218 | * @param int index of point in layout_.points | |
219 | */ | |
8c03ba63 | 220 | DygraphLayout.prototype.unstackPointAtIndex = function(idx) { |
667d510b | 221 | var point = this.points[idx]; |
222 | ||
223 | // Clone the point since we modify it | |
224 | var unstackedPoint = {}; | |
225 | for (var i in point) { | |
226 | unstackedPoint[i] = point[i]; | |
227 | } | |
228 | ||
229 | if (!this.attr_("stackedGraph")) { | |
230 | return unstackedPoint; | |
231 | } | |
232 | ||
233 | // The unstacked yval is equal to the current yval minus the yval of the | |
234 | // next point at the same xval. | |
235 | for (var i = idx+1; i < this.points.length; i++) { | |
236 | if (this.points[i].xval == point.xval) { | |
237 | unstackedPoint.yval -= this.points[i].yval; | |
238 | break; | |
239 | } | |
240 | } | |
241 | ||
242 | return unstackedPoint; | |
243 | } | |
244 | ||
6a1aa64f DV |
245 | // Subclass PlotKit.CanvasRenderer to add: |
246 | // 1. X/Y grid overlay | |
247 | // 2. Ability to draw error bars (if required) | |
248 | ||
249 | /** | |
250 | * Sets some PlotKit.CanvasRenderer options | |
251 | * @param {Object} element The canvas to attach to | |
285a6bda | 252 | * @param {Layout} layout The DygraphLayout object for this graph. |
6a1aa64f DV |
253 | * @param {Object} options Options to pass on to CanvasRenderer |
254 | */ | |
9317362d DV |
255 | DygraphCanvasRenderer = function(dygraph, element, layout, options) { |
256 | // TODO(danvk): remove options, just use dygraph.attr_. | |
9317362d | 257 | this.dygraph_ = dygraph; |
fbe31dc8 DV |
258 | |
259 | // default options | |
260 | this.options = { | |
f474c2a3 DV |
261 | "strokeWidth": 0.5, |
262 | "drawXAxis": true, | |
263 | "drawYAxis": true, | |
264 | "axisLineColor": "black", | |
265 | "axisLineWidth": 0.5, | |
266 | "axisTickSize": 3, | |
267 | "axisLabelColor": "black", | |
268 | "axisLabelFont": "Arial", | |
269 | "axisLabelFontSize": 9, | |
270 | "axisLabelWidth": 50, | |
271 | "drawYGrid": true, | |
272 | "drawXGrid": true, | |
43af96e7 | 273 | "gridLineColor": "rgb(128,128,128)", |
e7746234 EC |
274 | "fillAlpha": 0.15, |
275 | "underlayCallback": null | |
fbe31dc8 | 276 | }; |
fc80a396 | 277 | Dygraph.update(this.options, options); |
6a1aa64f | 278 | |
fbe31dc8 | 279 | this.layout = layout; |
b0c3b730 | 280 | this.element = element; |
fbe31dc8 DV |
281 | this.container = this.element.parentNode; |
282 | ||
fbe31dc8 DV |
283 | this.height = this.element.height; |
284 | this.width = this.element.width; | |
285 | ||
286 | // --- check whether everything is ok before we return | |
287 | if (!this.isIE && !(DygraphCanvasRenderer.isSupported(this.element))) | |
288 | throw "Canvas is not supported."; | |
289 | ||
290 | // internal state | |
291 | this.xlabels = new Array(); | |
292 | this.ylabels = new Array(); | |
ce49c2fa | 293 | this.annotations = new Array(); |
fbe31dc8 | 294 | |
ea4942ed | 295 | // TODO(danvk): consider all axes in this computation. |
fbe31dc8 | 296 | this.area = { |
9012dd21 | 297 | // TODO(danvk): per-axis setting. |
fbe31dc8 DV |
298 | x: this.options.yAxisLabelWidth + 2 * this.options.axisTickSize, |
299 | y: 0 | |
300 | }; | |
301 | this.area.w = this.width - this.area.x - this.options.rightGap; | |
302 | this.area.h = this.height - this.options.axisLabelFontSize - | |
303 | 2 * this.options.axisTickSize; | |
304 | ||
26ca7938 DV |
305 | // Shrink the drawing area to accomodate additional y-axes. |
306 | if (this.dygraph_.numAxes() == 2) { | |
307 | // TODO(danvk): per-axis setting. | |
308 | this.area.w -= (this.options.yAxisLabelWidth + 2 * this.options.axisTickSize); | |
309 | } else if (this.dygraph_.numAxes() > 2) { | |
310 | this.dygraph_.error("Only two y-axes are supported at this time. (Trying " + | |
311 | "to use " + this.layout.yAxes.length + ")"); | |
312 | } | |
313 | ||
b0c3b730 DV |
314 | this.container.style.position = "relative"; |
315 | this.container.style.width = this.width + "px"; | |
26ca7938 DV |
316 | |
317 | // Set up a clipping area for the canvas (and the interaction canvas). | |
318 | // This ensures that we don't overdraw. | |
319 | var ctx = this.element.getContext("2d"); | |
320 | ctx.beginPath(); | |
321 | ctx.rect(this.area.x, this.area.y, this.area.w, this.area.h); | |
322 | ctx.clip(); | |
323 | ||
324 | var ctx = this.dygraph_.hidden_.getContext("2d"); | |
325 | ctx.beginPath(); | |
326 | ctx.rect(this.area.x, this.area.y, this.area.w, this.area.h); | |
327 | ctx.clip(); | |
fbe31dc8 DV |
328 | }; |
329 | ||
330 | DygraphCanvasRenderer.prototype.clear = function() { | |
331 | if (this.isIE) { | |
332 | // VML takes a while to start up, so we just poll every this.IEDelay | |
333 | try { | |
334 | if (this.clearDelay) { | |
335 | this.clearDelay.cancel(); | |
336 | this.clearDelay = null; | |
337 | } | |
338 | var context = this.element.getContext("2d"); | |
339 | } | |
340 | catch (e) { | |
76171648 | 341 | // TODO(danvk): this is broken, since MochiKit.Async is gone. |
fbe31dc8 DV |
342 | this.clearDelay = MochiKit.Async.wait(this.IEDelay); |
343 | this.clearDelay.addCallback(bind(this.clear, this)); | |
344 | return; | |
345 | } | |
346 | } | |
347 | ||
348 | var context = this.element.getContext("2d"); | |
349 | context.clearRect(0, 0, this.width, this.height); | |
350 | ||
2160ed4a | 351 | for (var i = 0; i < this.xlabels.length; i++) { |
b0c3b730 DV |
352 | var el = this.xlabels[i]; |
353 | el.parentNode.removeChild(el); | |
2160ed4a DV |
354 | } |
355 | for (var i = 0; i < this.ylabels.length; i++) { | |
b0c3b730 DV |
356 | var el = this.ylabels[i]; |
357 | el.parentNode.removeChild(el); | |
2160ed4a | 358 | } |
ce49c2fa DV |
359 | for (var i = 0; i < this.annotations.length; i++) { |
360 | var el = this.annotations[i]; | |
361 | el.parentNode.removeChild(el); | |
362 | } | |
fbe31dc8 DV |
363 | this.xlabels = new Array(); |
364 | this.ylabels = new Array(); | |
ce49c2fa | 365 | this.annotations = new Array(); |
fbe31dc8 DV |
366 | }; |
367 | ||
368 | ||
369 | DygraphCanvasRenderer.isSupported = function(canvasName) { | |
370 | var canvas = null; | |
371 | try { | |
21d3323f | 372 | if (typeof(canvasName) == 'undefined' || canvasName == null) |
b0c3b730 | 373 | canvas = document.createElement("canvas"); |
fbe31dc8 | 374 | else |
b0c3b730 | 375 | canvas = canvasName; |
fbe31dc8 DV |
376 | var context = canvas.getContext("2d"); |
377 | } | |
378 | catch (e) { | |
379 | var ie = navigator.appVersion.match(/MSIE (\d\.\d)/); | |
380 | var opera = (navigator.userAgent.toLowerCase().indexOf("opera") != -1); | |
381 | if ((!ie) || (ie[1] < 6) || (opera)) | |
382 | return false; | |
383 | return true; | |
384 | } | |
385 | return true; | |
6a1aa64f | 386 | }; |
6a1aa64f DV |
387 | |
388 | /** | |
389 | * Draw an X/Y grid on top of the existing plot | |
390 | */ | |
285a6bda | 391 | DygraphCanvasRenderer.prototype.render = function() { |
6a1aa64f DV |
392 | // Draw the new X/Y grid |
393 | var ctx = this.element.getContext("2d"); | |
e7746234 EC |
394 | |
395 | if (this.options.underlayCallback) { | |
d9e6fa47 | 396 | this.options.underlayCallback(ctx, this.area, this.layout, this.dygraph_); |
e7746234 EC |
397 | } |
398 | ||
6a1aa64f DV |
399 | if (this.options.drawYGrid) { |
400 | var ticks = this.layout.yticks; | |
401 | ctx.save(); | |
f2f24402 | 402 | ctx.strokeStyle = this.options.gridLineColor; |
6a1aa64f DV |
403 | ctx.lineWidth = this.options.axisLineWidth; |
404 | for (var i = 0; i < ticks.length; i++) { | |
9012dd21 | 405 | if (ticks[i][0] != 0) continue; // TODO(danvk): per-axis property |
6a1aa64f | 406 | var x = this.area.x; |
9012dd21 | 407 | var y = this.area.y + ticks[i][1] * this.area.h; |
6a1aa64f DV |
408 | ctx.beginPath(); |
409 | ctx.moveTo(x, y); | |
410 | ctx.lineTo(x + this.area.w, y); | |
411 | ctx.closePath(); | |
412 | ctx.stroke(); | |
413 | } | |
414 | } | |
415 | ||
416 | if (this.options.drawXGrid) { | |
417 | var ticks = this.layout.xticks; | |
418 | ctx.save(); | |
f2f24402 | 419 | ctx.strokeStyle = this.options.gridLineColor; |
6a1aa64f DV |
420 | ctx.lineWidth = this.options.axisLineWidth; |
421 | for (var i=0; i<ticks.length; i++) { | |
9012dd21 | 422 | var x = this.area.x + ticks[i][1] * this.area.w; |
6a1aa64f DV |
423 | var y = this.area.y + this.area.h; |
424 | ctx.beginPath(); | |
425 | ctx.moveTo(x, y); | |
426 | ctx.lineTo(x, this.area.y); | |
427 | ctx.closePath(); | |
428 | ctx.stroke(); | |
429 | } | |
430 | } | |
2ce09b19 DV |
431 | |
432 | // Do the ordinary rendering, as before | |
2ce09b19 | 433 | this._renderLineChart(); |
fbe31dc8 | 434 | this._renderAxis(); |
ce49c2fa | 435 | this._renderAnnotations(); |
fbe31dc8 DV |
436 | }; |
437 | ||
438 | ||
439 | DygraphCanvasRenderer.prototype._renderAxis = function() { | |
440 | if (!this.options.drawXAxis && !this.options.drawYAxis) | |
441 | return; | |
442 | ||
443 | var context = this.element.getContext("2d"); | |
444 | ||
34fedff8 DV |
445 | var labelStyle = { |
446 | "position": "absolute", | |
447 | "fontSize": this.options.axisLabelFontSize + "px", | |
448 | "zIndex": 10, | |
f474c2a3 | 449 | "color": this.options.axisLabelColor, |
34fedff8 DV |
450 | "width": this.options.axisLabelWidth + "px", |
451 | "overflow": "hidden" | |
452 | }; | |
453 | var makeDiv = function(txt) { | |
454 | var div = document.createElement("div"); | |
455 | for (var name in labelStyle) { | |
85b99f0b DV |
456 | if (labelStyle.hasOwnProperty(name)) { |
457 | div.style[name] = labelStyle[name]; | |
458 | } | |
fbe31dc8 | 459 | } |
34fedff8 DV |
460 | div.appendChild(document.createTextNode(txt)); |
461 | return div; | |
fbe31dc8 DV |
462 | }; |
463 | ||
464 | // axis lines | |
465 | context.save(); | |
f474c2a3 | 466 | context.strokeStyle = this.options.axisLineColor; |
fbe31dc8 DV |
467 | context.lineWidth = this.options.axisLineWidth; |
468 | ||
fbe31dc8 | 469 | if (this.options.drawYAxis) { |
8b7a0cc3 | 470 | if (this.layout.yticks && this.layout.yticks.length > 0) { |
2160ed4a DV |
471 | for (var i = 0; i < this.layout.yticks.length; i++) { |
472 | var tick = this.layout.yticks[i]; | |
fbe31dc8 DV |
473 | if (typeof(tick) == "function") return; |
474 | var x = this.area.x; | |
9012dd21 DV |
475 | if (tick[0] == 1) { |
476 | x = this.area.x + this.area.w - labelStyle.width; | |
477 | } | |
478 | var y = this.area.y + tick[1] * this.area.h; | |
fbe31dc8 DV |
479 | context.beginPath(); |
480 | context.moveTo(x, y); | |
481 | context.lineTo(x - this.options.axisTickSize, y); | |
482 | context.closePath(); | |
483 | context.stroke(); | |
484 | ||
9012dd21 | 485 | var label = makeDiv(tick[2]); |
fbe31dc8 DV |
486 | var top = (y - this.options.axisLabelFontSize / 2); |
487 | if (top < 0) top = 0; | |
488 | ||
489 | if (top + this.options.axisLabelFontSize + 3 > this.height) { | |
490 | label.style.bottom = "0px"; | |
491 | } else { | |
492 | label.style.top = top + "px"; | |
493 | } | |
9012dd21 DV |
494 | if (tick[0] == 0) { |
495 | label.style.left = "0px"; | |
496 | label.style.textAlign = "right"; | |
497 | } else if (tick[0] == 1) { | |
498 | label.style.left = (this.area.x + this.area.w + | |
499 | this.options.axisTickSize) + "px"; | |
500 | label.style.textAlign = "left"; | |
501 | } | |
fbe31dc8 | 502 | label.style.width = this.options.yAxisLabelWidth + "px"; |
b0c3b730 | 503 | this.container.appendChild(label); |
fbe31dc8 | 504 | this.ylabels.push(label); |
2160ed4a | 505 | } |
fbe31dc8 DV |
506 | |
507 | // The lowest tick on the y-axis often overlaps with the leftmost | |
508 | // tick on the x-axis. Shift the bottom tick up a little bit to | |
509 | // compensate if necessary. | |
510 | var bottomTick = this.ylabels[0]; | |
511 | var fontSize = this.options.axisLabelFontSize; | |
512 | var bottom = parseInt(bottomTick.style.top) + fontSize; | |
513 | if (bottom > this.height - fontSize) { | |
514 | bottomTick.style.top = (parseInt(bottomTick.style.top) - | |
515 | fontSize / 2) + "px"; | |
516 | } | |
517 | } | |
518 | ||
519 | context.beginPath(); | |
520 | context.moveTo(this.area.x, this.area.y); | |
521 | context.lineTo(this.area.x, this.area.y + this.area.h); | |
522 | context.closePath(); | |
523 | context.stroke(); | |
c1dbeb10 DV |
524 | |
525 | if (this.dygraph_.numAxes() == 2) { | |
526 | context.beginPath(); | |
527 | context.moveTo(this.area.x + this.area.w, this.area.y); | |
528 | context.lineTo(this.area.x + this.area.w, this.area.y + this.area.h); | |
529 | context.closePath(); | |
530 | context.stroke(); | |
531 | } | |
fbe31dc8 DV |
532 | } |
533 | ||
534 | if (this.options.drawXAxis) { | |
535 | if (this.layout.xticks) { | |
2160ed4a DV |
536 | for (var i = 0; i < this.layout.xticks.length; i++) { |
537 | var tick = this.layout.xticks[i]; | |
fbe31dc8 DV |
538 | if (typeof(dataset) == "function") return; |
539 | ||
540 | var x = this.area.x + tick[0] * this.area.w; | |
541 | var y = this.area.y + this.area.h; | |
542 | context.beginPath(); | |
543 | context.moveTo(x, y); | |
544 | context.lineTo(x, y + this.options.axisTickSize); | |
545 | context.closePath(); | |
546 | context.stroke(); | |
547 | ||
34fedff8 | 548 | var label = makeDiv(tick[1]); |
fbe31dc8 DV |
549 | label.style.textAlign = "center"; |
550 | label.style.bottom = "0px"; | |
551 | ||
552 | var left = (x - this.options.axisLabelWidth/2); | |
553 | if (left + this.options.axisLabelWidth > this.width) { | |
554 | left = this.width - this.options.xAxisLabelWidth; | |
555 | label.style.textAlign = "right"; | |
556 | } | |
557 | if (left < 0) { | |
558 | left = 0; | |
559 | label.style.textAlign = "left"; | |
560 | } | |
561 | ||
562 | label.style.left = left + "px"; | |
563 | label.style.width = this.options.xAxisLabelWidth + "px"; | |
b0c3b730 | 564 | this.container.appendChild(label); |
fbe31dc8 | 565 | this.xlabels.push(label); |
2160ed4a | 566 | } |
fbe31dc8 DV |
567 | } |
568 | ||
569 | context.beginPath(); | |
570 | context.moveTo(this.area.x, this.area.y + this.area.h); | |
571 | context.lineTo(this.area.x + this.area.w, this.area.y + this.area.h); | |
572 | context.closePath(); | |
573 | context.stroke(); | |
574 | } | |
575 | ||
576 | context.restore(); | |
6a1aa64f DV |
577 | }; |
578 | ||
fbe31dc8 | 579 | |
ce49c2fa DV |
580 | DygraphCanvasRenderer.prototype._renderAnnotations = function() { |
581 | var annotationStyle = { | |
582 | "position": "absolute", | |
583 | "fontSize": this.options.axisLabelFontSize + "px", | |
584 | "zIndex": 10, | |
3bf2fa91 | 585 | "overflow": "hidden" |
ce49c2fa DV |
586 | }; |
587 | ||
ab5e5c75 DV |
588 | var bindEvt = function(eventName, classEventName, p, self) { |
589 | return function(e) { | |
590 | var a = p.annotation; | |
591 | if (a.hasOwnProperty(eventName)) { | |
592 | a[eventName](a, p, self.dygraph_, e); | |
593 | } else if (self.dygraph_.attr_(classEventName)) { | |
594 | self.dygraph_.attr_(classEventName)(a, p, self.dygraph_,e ); | |
595 | } | |
596 | }; | |
597 | } | |
598 | ||
ce49c2fa DV |
599 | // Get a list of point with annotations. |
600 | var points = this.layout.annotated_points; | |
601 | for (var i = 0; i < points.length; i++) { | |
602 | var p = points[i]; | |
e6d53148 DV |
603 | if (p.canvasx < this.area.x || p.canvasx > this.area.x + this.area.w) { |
604 | continue; | |
605 | } | |
606 | ||
ce5e8d36 DV |
607 | var a = p.annotation; |
608 | var tick_height = 6; | |
609 | if (a.hasOwnProperty("tickHeight")) { | |
610 | tick_height = a.tickHeight; | |
9a40897e DV |
611 | } |
612 | ||
ce49c2fa DV |
613 | var div = document.createElement("div"); |
614 | for (var name in annotationStyle) { | |
615 | if (annotationStyle.hasOwnProperty(name)) { | |
616 | div.style[name] = annotationStyle[name]; | |
617 | } | |
618 | } | |
ce5e8d36 DV |
619 | if (!a.hasOwnProperty('icon')) { |
620 | div.className = "dygraphDefaultAnnotation"; | |
621 | } | |
622 | if (a.hasOwnProperty('cssClass')) { | |
623 | div.className += " " + a.cssClass; | |
624 | } | |
625 | ||
a5ad69cc DV |
626 | var width = a.hasOwnProperty('width') ? a.width : 16; |
627 | var height = a.hasOwnProperty('height') ? a.height : 16; | |
ce5e8d36 DV |
628 | if (a.hasOwnProperty('icon')) { |
629 | var img = document.createElement("img"); | |
630 | img.src = a.icon; | |
33030f33 DV |
631 | img.width = width; |
632 | img.height = height; | |
ce5e8d36 DV |
633 | div.appendChild(img); |
634 | } else if (p.annotation.hasOwnProperty('shortText')) { | |
635 | div.appendChild(document.createTextNode(p.annotation.shortText)); | |
5c528fa2 | 636 | } |
ce5e8d36 | 637 | div.style.left = (p.canvasx - width / 2) + "px"; |
d14b9eed DV |
638 | if (a.attachAtBottom) { |
639 | div.style.top = (this.area.h - height - tick_height) + "px"; | |
640 | } else { | |
641 | div.style.top = (p.canvasy - height - tick_height) + "px"; | |
642 | } | |
ce5e8d36 DV |
643 | div.style.width = width + "px"; |
644 | div.style.height = height + "px"; | |
ce49c2fa DV |
645 | div.title = p.annotation.text; |
646 | div.style.color = this.colors[p.name]; | |
647 | div.style.borderColor = this.colors[p.name]; | |
e6d53148 | 648 | a.div = div; |
ab5e5c75 | 649 | |
9a40897e DV |
650 | Dygraph.addEvent(div, 'click', |
651 | bindEvt('clickHandler', 'annotationClickHandler', p, this)); | |
652 | Dygraph.addEvent(div, 'mouseover', | |
653 | bindEvt('mouseOverHandler', 'annotationMouseOverHandler', p, this)); | |
654 | Dygraph.addEvent(div, 'mouseout', | |
655 | bindEvt('mouseOutHandler', 'annotationMouseOutHandler', p, this)); | |
656 | Dygraph.addEvent(div, 'dblclick', | |
657 | bindEvt('dblClickHandler', 'annotationDblClickHandler', p, this)); | |
ab5e5c75 | 658 | |
ce49c2fa DV |
659 | this.container.appendChild(div); |
660 | this.annotations.push(div); | |
9a40897e DV |
661 | |
662 | var ctx = this.element.getContext("2d"); | |
663 | ctx.strokeStyle = this.colors[p.name]; | |
664 | ctx.beginPath(); | |
d14b9eed DV |
665 | if (!a.attachAtBottom) { |
666 | ctx.moveTo(p.canvasx, p.canvasy); | |
667 | ctx.lineTo(p.canvasx, p.canvasy - 2 - tick_height); | |
668 | } else { | |
669 | ctx.moveTo(p.canvasx, this.area.h); | |
670 | ctx.lineTo(p.canvasx, this.area.h - 2 - tick_height); | |
671 | } | |
9a40897e DV |
672 | ctx.closePath(); |
673 | ctx.stroke(); | |
ce49c2fa DV |
674 | } |
675 | }; | |
676 | ||
677 | ||
6a1aa64f DV |
678 | /** |
679 | * Overrides the CanvasRenderer method to draw error bars | |
680 | */ | |
285a6bda | 681 | DygraphCanvasRenderer.prototype._renderLineChart = function() { |
6a1aa64f DV |
682 | var context = this.element.getContext("2d"); |
683 | var colorCount = this.options.colorScheme.length; | |
684 | var colorScheme = this.options.colorScheme; | |
43af96e7 | 685 | var fillAlpha = this.options.fillAlpha; |
6a1aa64f | 686 | var errorBars = this.layout.options.errorBars; |
5954ef32 | 687 | var fillGraph = this.layout.options.fillGraph; |
354e15ab | 688 | var stackedGraph = this.layout.options.stackedGraph; |
afdc483f | 689 | var stepPlot = this.layout.options.stepPlot; |
21d3323f DV |
690 | |
691 | var setNames = []; | |
ca43052c | 692 | for (var name in this.layout.datasets) { |
85b99f0b DV |
693 | if (this.layout.datasets.hasOwnProperty(name)) { |
694 | setNames.push(name); | |
695 | } | |
ca43052c | 696 | } |
21d3323f | 697 | var setCount = setNames.length; |
6a1aa64f | 698 | |
f032c51d AV |
699 | this.colors = {} |
700 | for (var i = 0; i < setCount; i++) { | |
701 | this.colors[setNames[i]] = colorScheme[i % colorCount]; | |
702 | } | |
703 | ||
ff00d3e2 DV |
704 | // Update Points |
705 | // TODO(danvk): here | |
2160ed4a DV |
706 | for (var i = 0; i < this.layout.points.length; i++) { |
707 | var point = this.layout.points[i]; | |
6a1aa64f DV |
708 | point.canvasx = this.area.w * point.x + this.area.x; |
709 | point.canvasy = this.area.h * point.y + this.area.y; | |
710 | } | |
6a1aa64f DV |
711 | |
712 | // create paths | |
9317362d | 713 | var isOK = function(x) { return x && !isNaN(x); }; |
6a1aa64f | 714 | |
80aaae18 DV |
715 | var ctx = context; |
716 | if (errorBars) { | |
6a834bbb DV |
717 | if (fillGraph) { |
718 | this.dygraph_.warn("Can't use fillGraph option with error bars"); | |
719 | } | |
720 | ||
6a1aa64f DV |
721 | for (var i = 0; i < setCount; i++) { |
722 | var setName = setNames[i]; | |
ea4942ed DV |
723 | var axis = this.layout.options.yAxes[ |
724 | this.layout.options.seriesToAxisMap[setName]]; | |
f032c51d | 725 | var color = this.colors[setName]; |
6a1aa64f DV |
726 | |
727 | // setup graphics context | |
80aaae18 | 728 | ctx.save(); |
56623f3b | 729 | var prevX = NaN; |
afdc483f | 730 | var prevY = NaN; |
6a1aa64f | 731 | var prevYs = [-1, -1]; |
ea4942ed | 732 | var yscale = axis.yscale; |
f474c2a3 DV |
733 | // should be same color as the lines but only 15% opaque. |
734 | var rgb = new RGBColor(color); | |
43af96e7 NK |
735 | var err_color = 'rgba(' + rgb.r + ',' + rgb.g + ',' + rgb.b + ',' + |
736 | fillAlpha + ')'; | |
f474c2a3 | 737 | ctx.fillStyle = err_color; |
05c9d0c4 DV |
738 | ctx.beginPath(); |
739 | for (var j = 0; j < this.layout.points.length; j++) { | |
740 | var point = this.layout.points[j]; | |
6a1aa64f | 741 | if (point.name == setName) { |
5954ef32 | 742 | if (!isOK(point.y)) { |
56623f3b | 743 | prevX = NaN; |
ae85914a | 744 | continue; |
5011e7a1 | 745 | } |
ce49c2fa | 746 | |
ff00d3e2 | 747 | // TODO(danvk): here |
afdc483f NN |
748 | if (stepPlot) { |
749 | var newYs = [ prevY - point.errorPlus * yscale, | |
47600757 | 750 | prevY + point.errorMinus * yscale ]; |
afdc483f NN |
751 | prevY = point.y; |
752 | } else { | |
753 | var newYs = [ point.y - point.errorPlus * yscale, | |
47600757 | 754 | point.y + point.errorMinus * yscale ]; |
afdc483f | 755 | } |
6a1aa64f DV |
756 | newYs[0] = this.area.h * newYs[0] + this.area.y; |
757 | newYs[1] = this.area.h * newYs[1] + this.area.y; | |
56623f3b | 758 | if (!isNaN(prevX)) { |
afdc483f | 759 | if (stepPlot) { |
47600757 | 760 | ctx.moveTo(prevX, newYs[0]); |
afdc483f | 761 | } else { |
47600757 | 762 | ctx.moveTo(prevX, prevYs[0]); |
afdc483f | 763 | } |
5954ef32 DV |
764 | ctx.lineTo(point.canvasx, newYs[0]); |
765 | ctx.lineTo(point.canvasx, newYs[1]); | |
afdc483f | 766 | if (stepPlot) { |
47600757 | 767 | ctx.lineTo(prevX, newYs[1]); |
afdc483f | 768 | } else { |
47600757 | 769 | ctx.lineTo(prevX, prevYs[1]); |
afdc483f | 770 | } |
5954ef32 DV |
771 | ctx.closePath(); |
772 | } | |
354e15ab | 773 | prevYs = newYs; |
5954ef32 DV |
774 | prevX = point.canvasx; |
775 | } | |
776 | } | |
777 | ctx.fill(); | |
778 | } | |
779 | } else if (fillGraph) { | |
354e15ab DE |
780 | var baseline = [] // for stacked graphs: baseline for filling |
781 | ||
782 | // process sets in reverse order (needed for stacked graphs) | |
783 | for (var i = setCount - 1; i >= 0; i--) { | |
5954ef32 | 784 | var setName = setNames[i]; |
f032c51d | 785 | var color = this.colors[setName]; |
ea4942ed DV |
786 | var axis = this.layout.options.yAxes[ |
787 | this.layout.options.seriesToAxisMap[setName]]; | |
788 | var axisY = 1.0 + axis.minyval * axis.yscale; | |
789 | if (axisY < 0.0) axisY = 0.0; | |
790 | else if (axisY > 1.0) axisY = 1.0; | |
791 | axisY = this.area.h * axisY + this.area.y; | |
5954ef32 DV |
792 | |
793 | // setup graphics context | |
794 | ctx.save(); | |
56623f3b | 795 | var prevX = NaN; |
5954ef32 | 796 | var prevYs = [-1, -1]; |
ea4942ed | 797 | var yscale = axis.yscale; |
5954ef32 DV |
798 | // should be same color as the lines but only 15% opaque. |
799 | var rgb = new RGBColor(color); | |
43af96e7 NK |
800 | var err_color = 'rgba(' + rgb.r + ',' + rgb.g + ',' + rgb.b + ',' + |
801 | fillAlpha + ')'; | |
5954ef32 DV |
802 | ctx.fillStyle = err_color; |
803 | ctx.beginPath(); | |
804 | for (var j = 0; j < this.layout.points.length; j++) { | |
805 | var point = this.layout.points[j]; | |
5954ef32 DV |
806 | if (point.name == setName) { |
807 | if (!isOK(point.y)) { | |
56623f3b | 808 | prevX = NaN; |
5954ef32 DV |
809 | continue; |
810 | } | |
354e15ab DE |
811 | var newYs; |
812 | if (stackedGraph) { | |
813 | lastY = baseline[point.canvasx]; | |
814 | if (lastY === undefined) lastY = axisY; | |
815 | baseline[point.canvasx] = point.canvasy; | |
816 | newYs = [ point.canvasy, lastY ]; | |
817 | } else { | |
818 | newYs = [ point.canvasy, axisY ]; | |
819 | } | |
56623f3b | 820 | if (!isNaN(prevX)) { |
05c9d0c4 | 821 | ctx.moveTo(prevX, prevYs[0]); |
afdc483f | 822 | if (stepPlot) { |
47600757 | 823 | ctx.lineTo(point.canvasx, prevYs[0]); |
afdc483f | 824 | } else { |
47600757 | 825 | ctx.lineTo(point.canvasx, newYs[0]); |
afdc483f | 826 | } |
05c9d0c4 DV |
827 | ctx.lineTo(point.canvasx, newYs[1]); |
828 | ctx.lineTo(prevX, prevYs[1]); | |
829 | ctx.closePath(); | |
6a1aa64f | 830 | } |
354e15ab | 831 | prevYs = newYs; |
6a1aa64f DV |
832 | prevX = point.canvasx; |
833 | } | |
05c9d0c4 | 834 | } |
6a1aa64f DV |
835 | ctx.fill(); |
836 | } | |
80aaae18 DV |
837 | } |
838 | ||
839 | for (var i = 0; i < setCount; i++) { | |
840 | var setName = setNames[i]; | |
f032c51d | 841 | var color = this.colors[setName]; |
227b93cc | 842 | var strokeWidth = this.dygraph_.attr_("strokeWidth", setName); |
80aaae18 DV |
843 | |
844 | // setup graphics context | |
845 | context.save(); | |
846 | var point = this.layout.points[0]; | |
227b93cc | 847 | var pointSize = this.dygraph_.attr_("pointSize", setName); |
80aaae18 | 848 | var prevX = null, prevY = null; |
227b93cc | 849 | var drawPoints = this.dygraph_.attr_("drawPoints", setName); |
80aaae18 DV |
850 | var points = this.layout.points; |
851 | for (var j = 0; j < points.length; j++) { | |
852 | var point = points[j]; | |
853 | if (point.name == setName) { | |
854 | if (!isOK(point.canvasy)) { | |
5d13ef68 | 855 | if (stepPlot && prevX != null) { |
0599d13b NN |
856 | // Draw a horizontal line to the start of the missing data |
857 | ctx.beginPath(); | |
858 | ctx.strokeStyle = color; | |
859 | ctx.lineWidth = this.options.strokeWidth; | |
860 | ctx.moveTo(prevX, prevY); | |
861 | ctx.lineTo(point.canvasx, prevY); | |
862 | ctx.stroke(); | |
863 | } | |
80aaae18 DV |
864 | // this will make us move to the next point, not draw a line to it. |
865 | prevX = prevY = null; | |
866 | } else { | |
867 | // A point is "isolated" if it is non-null but both the previous | |
868 | // and next points are null. | |
869 | var isIsolated = (!prevX && (j == points.length - 1 || | |
870 | !isOK(points[j+1].canvasy))); | |
871 | ||
872 | if (!prevX) { | |
873 | prevX = point.canvasx; | |
874 | prevY = point.canvasy; | |
875 | } else { | |
46dde5f9 DV |
876 | // TODO(danvk): figure out why this conditional is necessary. |
877 | if (strokeWidth) { | |
878 | ctx.beginPath(); | |
879 | ctx.strokeStyle = color; | |
880 | ctx.lineWidth = strokeWidth; | |
881 | ctx.moveTo(prevX, prevY); | |
882 | if (stepPlot) { | |
883 | ctx.lineTo(point.canvasx, prevY); | |
884 | } | |
885 | prevX = point.canvasx; | |
886 | prevY = point.canvasy; | |
887 | ctx.lineTo(prevX, prevY); | |
888 | ctx.stroke(); | |
afdc483f | 889 | } |
80aaae18 DV |
890 | } |
891 | ||
892 | if (drawPoints || isIsolated) { | |
893 | ctx.beginPath(); | |
894 | ctx.fillStyle = color; | |
7bf6a9fe DV |
895 | ctx.arc(point.canvasx, point.canvasy, pointSize, |
896 | 0, 2 * Math.PI, false); | |
80aaae18 DV |
897 | ctx.fill(); |
898 | } | |
899 | } | |
900 | } | |
901 | } | |
902 | } | |
6a1aa64f | 903 | |
6a1aa64f DV |
904 | context.restore(); |
905 | }; |