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1 /* | |
2 Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
3 Use of this source code is governed by a BSD-style license that can be | |
4 found in the LICENSE file. | |
5 */ | |
6 | |
7 // Collection of classes used to plot data in a <canvas>. Create a Plotter() | |
8 // to generate a plot. | |
9 | |
10 // Vertical marker for columns. | |
11 function Marker(color) { | |
12 var m = document.createElement("DIV"); | |
13 m.setAttribute("class", "plot-cursor"); | |
14 m.style.backgroundColor = color; | |
15 m.style.opacity = "0.3"; | |
16 m.style.position = "absolute"; | |
17 m.style.left = "-2px"; | |
18 m.style.top = "-2px"; | |
19 m.style.width = "0px"; | |
20 m.style.height = "0px"; | |
21 return m; | |
22 } | |
23 | |
24 /** | |
25 * Adds commas to |number|. | |
26 * | |
27 * Examples: | |
28 * 1234.56 => "1,234.56" | |
29 * "99999" => "99,999" | |
30 * | |
31 * @param number {string|number} The number to format. | |
32 * @return {string} String representation of |number| with commas every | |
33 * three places. | |
34 */ | |
35 function addCommas(number) { | |
36 number += ''; // Convert number to string if not already. | |
37 var numberParts = number.split('.'); | |
38 var integralPart = numberParts[0]; | |
39 var fractionalPart = numberParts.length > 1 ? '.' + numberParts[1] : ''; | |
40 var reThreeDigits = /(\d+)(\d{3})/; | |
41 while (reThreeDigits.test(integralPart)) { | |
42 integralPart = integralPart.replace(reThreeDigits, '$1' + ',' + '$2'); | |
43 } | |
44 return integralPart + fractionalPart; | |
45 } | |
46 | |
47 /** | |
48 * HorizontalMarker class | |
49 * Create a horizontal marker at the indicated mouse location. | |
50 * @constructor | |
51 * | |
52 * @param canvasRect {Object} The canvas bounds (in client coords). | |
53 * @param clientY {Number} The vertical mouse click location that spawned | |
54 * the marker, in the client coordinate space. | |
55 * @param yValue {Number} The plotted value corresponding to the clientY | |
56 * click location. | |
57 */ | |
58 function HorizontalMarker(canvasRect, clientY, yValue) { | |
59 // Add a horizontal line to the graph. | |
60 var m = document.createElement("DIV"); | |
61 m.setAttribute("class", "plot-baseline"); | |
62 m.style.backgroundColor = HorizontalMarker.COLOR; | |
63 m.style.opacity = "0.3"; | |
64 m.style.position = "absolute"; | |
65 m.style.left = canvasRect.offsetLeft; | |
66 var h = HorizontalMarker.HEIGHT; | |
67 m.style.top = (clientY - h/2).toFixed(0) + "px"; | |
68 m.style.width = canvasRect.offsetWidth + "px"; | |
69 m.style.height = h + "px"; | |
70 this.markerDiv_ = m; | |
71 | |
72 this.value = yValue; | |
73 } | |
74 | |
75 HorizontalMarker.HEIGHT = 5; | |
76 HorizontalMarker.COLOR = "rgb(0,100,100)"; | |
77 | |
78 // Remove the horizontal line from the graph. | |
79 HorizontalMarker.prototype.remove_ = function() { | |
80 this.markerDiv_.parentNode.removeChild(this.markerDiv_); | |
81 }; | |
82 | |
83 | |
84 /** | |
85 * Plotter class | |
86 * @constructor | |
87 * | |
88 * Draws a chart using CANVAS element. Takes array of lines to draw with | |
89 * deviations values for each data sample. | |
90 * | |
91 * @param {Array} clNumbers list of clNumbers for each data sample. | |
92 * @param {Array} plotData list of arrays that represent individual lines. | |
93 * The line itself is an Array of value and stdd. | |
94 * @param {Array} dataDescription list of data description for each line | |
95 * in plotData. | |
96 * @param {string} units name of measurement used to describe plotted data. | |
97 * | |
98 * Example of the plotData: | |
99 * [ | |
100 * [line 1 data], | |
101 * [line 2 data] | |
102 * ]. | |
103 * Line data looks like [[point one], [point two]]. | |
104 * And individual points are [value, deviation value] | |
105 */ | |
106 function Plotter(clNumbers, plotData, dataDescription, units, resultNode, | |
107 width, height) { | |
108 this.clNumbers_ = clNumbers; | |
109 this.plotData_ = plotData; | |
110 this.dataDescription_ = dataDescription; | |
111 this.dataColors_ = []; | |
112 this.dataIndexByName_ = {}; | |
113 this.resultNode_ = resultNode; | |
114 this.units_ = units; | |
115 this.selectedTraces_ = []; | |
116 this.imageCache_ = null; | |
117 this.enableMouseScroll = true; | |
118 this.coordinates = new Coordinates(plotData, width, height); | |
119 if (isNaN(width)) | |
120 this.width = this.coordinates.widthMax; | |
121 else | |
122 this.width = width; | |
123 | |
124 this.plotPane_ = null; | |
125 | |
126 // A color palette that's unambigous for normal and color-deficient viewers. | |
127 // Values are (red, green, blue) on a scale of 255. | |
128 // Taken from http://jfly.iam.u-tokyo.ac.jp/html/manuals/pdf/color_blind.pdf | |
129 this.colors = [[0, 114, 178], // blue | |
130 [230, 159, 0], // orange | |
131 [0, 158, 115], // green | |
132 [204, 121, 167], // purplish pink | |
133 [86, 180, 233], // sky blue | |
134 [213, 94, 0], // dark orange | |
135 [0, 0, 0], // black | |
136 [240, 228, 66] // yellow | |
137 ]; | |
138 | |
139 var categoryColors = {}; | |
140 var colorIndex = 0; | |
141 for (var i = 0; i < this.dataDescription_.length; i++) { | |
142 this.dataIndexByName_[this.dataDescription_[i]] = i; | |
143 var category = this.dataDescription_[i].replace(/-.*/, ""); | |
144 if (this.dataDescription_[i].indexOf("ref") == -1) { | |
145 category += "-ref"; | |
146 } | |
147 if (!categoryColors[category]) { | |
148 categoryColors[category] = this.makeColor(colorIndex++); | |
149 } | |
150 this.dataColors_[i] = categoryColors[category]; | |
151 } | |
152 } | |
153 | |
154 /** | |
155 * Does the actual plotting. | |
156 */ | |
157 Plotter.prototype.plot = function() { | |
158 this.canvas_elt_ = this.canvas(); | |
159 this.coordinates_div_ = this.coordinates_(); | |
160 this.ruler_div_ = this.ruler(); | |
161 // marker for the result-point that the mouse is currently over | |
162 this.cursor_div_ = new Marker("rgb(100,80,240)"); | |
163 // marker for the result-point for which details are shown | |
164 this.marker_div_ = new Marker("rgb(100,100,100)"); | |
165 | |
166 this.plotPane_ = document.createElement('div'); | |
167 this.plotPane_.setAttribute('class', 'plot'); | |
168 this.plotPane_.setAttribute('style', 'position: relative'); | |
169 this.resultNode_.appendChild(this.plotPane_); | |
170 this.plotPane_.appendChild(this.canvas_elt_); | |
171 this.plotPane_.appendChild(this.ruler_div_); | |
172 this.plotPane_.appendChild(this.cursor_div_); | |
173 this.plotPane_.appendChild(this.marker_div_); | |
174 | |
175 this.resultNode_.appendChild(this.coordinates_div_); | |
176 this.attachEventListeners(this.canvas_elt_); | |
177 | |
178 this.redraw(); | |
179 | |
180 this.graduation_divs_ = this.graduations(); | |
181 for (var i = 0; i < this.graduation_divs_.length; i++) | |
182 this.plotPane_.appendChild(this.graduation_divs_[i]); | |
183 }; | |
184 | |
185 /** | |
186 * Redraws the canvas with selected traces highlighted. | |
187 */ | |
188 Plotter.prototype.redraw = function() { | |
189 var ctx = this.canvas_elt_.getContext("2d"); | |
190 var doDrawImage = this.selectedTraces_.length || this.imageCache_; | |
191 // Drawing all lines can take a few seconds on large graphs, so use a cache. | |
192 // After the initial render, the cache draws quickly on Firefox and Chrome. | |
193 if (!this.imageCache_) { | |
194 // Clear it with white: otherwise canvas will draw on top of existing data. | |
195 ctx.clearRect(0, 0, this.canvas_elt_.width, this.canvas_elt_.height); | |
196 // Draw all data lines. | |
197 for (var i = 0; i < this.plotData_.length; i++) | |
198 this.plotLine_(ctx, this.getDataColor(i), this.plotData_[i]); | |
199 // Here we convert the canvas to an image by making a new Image with | |
200 // src set to the canvas's Data URL. | |
201 var imageDataURL = this.canvas_elt_.toDataURL(); | |
202 this.imageCache_ = new Image; | |
203 this.imageCache_.src = imageDataURL; | |
204 } | |
205 if (doDrawImage) { | |
206 // Clear it again so we don't draw on top of the old line. | |
207 ctx.clearRect(0, 0, this.canvas_elt_.width, this.canvas_elt_.height); | |
208 // If we have selections, dim the other traces by first setting low alpha. | |
209 if (this.selectedTraces_.length) | |
210 ctx.globalAlpha = 0.2; | |
211 // Draw the cached image. | |
212 ctx.drawImage(this.imageCache_, 0, 0); | |
213 // Restore the alpha so we can draw selected lines in full opacity. | |
214 ctx.globalAlpha = 1; | |
215 } | |
216 // Now draw all selected traces in order of selection. | |
217 for (var i = 0; i < this.selectedTraces_.length; i++) { | |
218 var index = this.selectedTraces_[i]; | |
219 this.plotLine_(ctx, this.getDataColor(index), this.plotData_[index]); | |
220 } | |
221 }; | |
222 | |
223 /** | |
224 * Sets the selected state of a given trace. | |
225 * @param {number} trace_index | |
226 * @return {boolean} true if the trace has been selected, false if deselected. | |
227 */ | |
228 Plotter.prototype.toggleSelection = function(trace_index) { | |
229 var i = this.selectedTraces_.indexOf(trace_index); | |
230 var ret = (i == -1); | |
231 if (ret) | |
232 this.selectedTraces_.push(trace_index); | |
233 else | |
234 this.selectedTraces_.splice(i, 1); | |
235 this.redraw(); | |
236 return ret; | |
237 }; | |
238 | |
239 Plotter.prototype.drawDeviationBar_ = function(context, strokeStyles, x, | |
240 y_errLow, y_errHigh) { | |
241 context.strokeStyle = strokeStyles; | |
242 context.lineWidth = 1.0; | |
243 context.beginPath(); | |
244 context.moveTo(x, y_errHigh); | |
245 context.lineTo(x, y_errLow); | |
246 context.closePath(); | |
247 context.stroke(); | |
248 }; | |
249 | |
250 Plotter.prototype.plotLine_ = function(ctx, strokeStyles, data) { | |
251 ctx.strokeStyle = strokeStyles; | |
252 ctx.lineWidth = 2.0; | |
253 ctx.beginPath(); | |
254 var initial = true; | |
255 var deviationData = []; | |
256 for (var i = 0; i < data.length; i++) { | |
257 var x = this.coordinates.xPoints(i); | |
258 var value = parseFloat(data[i][0]); | |
259 var stdd = parseFloat(data[i][1]); | |
260 var y = 0.0; | |
261 var y_errLow = 0.0; | |
262 var y_errHigh = 0.0; | |
263 if (isNaN(value)) { | |
264 // Re-set 'initial' if we're at a gap in the data. | |
265 initial = true; | |
266 } else { | |
267 y = this.coordinates.yPoints(value); | |
268 // We assume that the stdd will only be NaN (missing) when the value is. | |
269 if (value != 0.0) { | |
270 y_errLow = this.coordinates.yPoints(value - stdd); | |
271 y_errHigh = this.coordinates.yPoints(value + stdd); | |
272 } | |
273 if (initial) | |
274 initial = false; | |
275 else | |
276 ctx.lineTo(x, y); | |
277 } | |
278 | |
279 ctx.moveTo(x, y); | |
280 deviationData.push([x, y_errLow, y_errHigh]); | |
281 } | |
282 ctx.closePath(); | |
283 ctx.stroke(); | |
284 | |
285 for (var i = 0; i < deviationData.length; i++) { | |
286 this.drawDeviationBar_(ctx, strokeStyles, deviationData[i][0], | |
287 deviationData[i][1], deviationData[i][2]); | |
288 } | |
289 }; | |
290 | |
291 Plotter.prototype.attachEventListeners = function(canvas) { | |
292 var self = this; | |
293 if (this.enableMouseScroll) { | |
294 canvas.parentNode.addEventListener( | |
295 "mousewheel", function(evt) { self.onMouseScroll_(evt); }, false); | |
296 canvas.parentNode.addEventListener( | |
297 "DOMMouseScroll", function(evt) { self.onMouseScroll_(evt); }, false); | |
298 } | |
299 canvas.parentNode.addEventListener( | |
300 "mousemove", function(evt) { self.onMouseMove_(evt); }, false); | |
301 this.cursor_div_.addEventListener( | |
302 "click", function(evt) { self.onMouseClick_(evt); }, false); | |
303 }; | |
304 | |
305 Plotter.prototype.onMouseScroll_ = function(evt) { | |
306 // Chrome uses wheelDelta and Mozilla uses detail with opposite sign values. | |
307 var zoom = evt.wheelDelta ? evt.wheelDelta : -evt.detail; | |
308 zoom = zoom < 0 ? -1 : 1; | |
309 // Zoom less if the shift key is held. | |
310 if (evt.shiftKey) | |
311 zoom /= 10; | |
312 | |
313 var obj = this.canvas_elt_; | |
314 var offsetTop = 0; | |
315 do { | |
316 offsetTop += obj.offsetTop; | |
317 } while (obj = obj.offsetParent); | |
318 var positionY = evt.clientY + document.body.scrollTop - offsetTop; | |
319 var yValue = this.coordinates.yValue(positionY); | |
320 var yTopToMouse = this.coordinates.yMaxValue - (this.coordinates.yMaxValue + | |
321 yValue) / 2; | |
322 var yBottomToMouse = (yValue + this.coordinates.yMinValue) / 2 - | |
323 this.coordinates.yMinValue; | |
324 | |
325 this.coordinates.yMinValue += yBottomToMouse * zoom; | |
326 this.coordinates.yMaxValue -= yTopToMouse * zoom; | |
327 this.imageCache_ = null; | |
328 if(this.horizontal_marker_) { | |
329 this.horizontal_marker_.remove_(); | |
330 this.horizontal_marker_ = null; | |
331 } | |
332 for (var i = 0; i < this.graduation_divs_.length; i++) | |
333 this.plotPane_.removeChild(this.graduation_divs_[i]); | |
334 this.graduation_divs_ = this.graduations(); | |
335 for (var i = 0; i < this.graduation_divs_.length; i++) | |
336 this.plotPane_.appendChild(this.graduation_divs_[i]); | |
337 this.redraw(); | |
338 }; | |
339 | |
340 Plotter.prototype.updateRuler_ = function(evt) { | |
341 var r = this.ruler_div_; | |
342 var obj = this.canvas_elt_; | |
343 var offsetTop = 0; | |
344 do { | |
345 offsetTop += obj.offsetTop; | |
346 } while (obj = obj.offsetParent); | |
347 r.style.left = this.canvas_elt_.offsetLeft + "px"; | |
348 r.style.top = this.canvas_elt_.offsetTop + "px"; | |
349 r.style.width = this.canvas_elt_.offsetWidth + "px"; | |
350 var h = evt.clientY + document.body.scrollTop - offsetTop; | |
351 if (h > this.canvas_elt_.offsetHeight) | |
352 h = this.canvas_elt_.offsetHeight; | |
353 r.style.height = h + "px"; | |
354 }; | |
355 | |
356 Plotter.prototype.updateCursor_ = function() { | |
357 var c = this.cursor_div_; | |
358 c.style.top = this.canvas_elt_.offsetTop + "px"; | |
359 c.style.height = this.canvas_elt_.offsetHeight + "px"; | |
360 var w = this.canvas_elt_.offsetWidth / this.clNumbers_.length; | |
361 var x = (this.canvas_elt_.offsetLeft + w * this.current_index_).toFixed(0); | |
362 c.style.left = x + "px"; | |
363 c.style.width = w + "px"; | |
364 }; | |
365 | |
366 Plotter.prototype.chromiumCLNumber_ = function(index) { | |
367 // CL number entries are either revisions or objects of the form | |
368 // {chromium: revision, webkit: revision} | |
369 return this.clNumbers_[index].chromium || this.clNumbers_[index]; | |
370 }; | |
371 | |
372 Plotter.prototype.onMouseMove_ = function(evt) { | |
373 var obj = this.canvas_elt_; | |
374 var offsetTop = 0; | |
375 var offsetLeft = 0; | |
376 do { | |
377 offsetTop += obj.offsetTop; | |
378 offsetLeft += obj.offsetLeft; | |
379 } while (obj = obj.offsetParent); | |
380 | |
381 var canvas = evt.currentTarget.firstChild; | |
382 var positionX = evt.clientX + document.body.scrollLeft - offsetLeft; | |
383 var positionY = evt.clientY + document.body.scrollTop - offsetTop; | |
384 | |
385 this.current_index_ = this.coordinates.dataSampleIndex(positionX); | |
386 var yValue = this.coordinates.yValue(positionY); | |
387 | |
388 var html = ""; | |
389 if (!isNaN(this.chromiumCLNumber_(0))) | |
390 html = "r"; | |
391 html += this.chromiumCLNumber_(this.current_index_); | |
392 var webkitCLNumber = this.clNumbers_[this.current_index_].webkit; | |
393 if (webkitCLNumber) { | |
394 html += ", webkit "; | |
395 if (!isNaN(webkitCLNumber)) | |
396 html += "r"; | |
397 html += webkitCLNumber; | |
398 } | |
399 | |
400 html += ": " + | |
401 addCommas(this.plotData_[0][this.current_index_][0].toFixed(2)) + | |
402 " " + this.units_ + " +/- " + | |
403 addCommas(this.plotData_[0][this.current_index_][1].toFixed(2)) + | |
404 " " + addCommas(yValue.toFixed(2)) + " " + this.units_; | |
405 | |
406 this.coordinates_td_.innerHTML = html; | |
407 | |
408 // If there is a horizontal marker, also display deltas relative to it. | |
409 if (this.horizontal_marker_) { | |
410 var baseline = this.horizontal_marker_.value; | |
411 var delta = yValue - baseline; | |
412 var fraction = delta / baseline; // allow division by 0 | |
413 | |
414 var deltaStr = (delta >= 0 ? "+" : "") + delta.toFixed(0) + " " + | |
415 this.units_; | |
416 var percentStr = (fraction >= 0 ? "+" : "") + | |
417 (fraction * 100).toFixed(3) + "%"; | |
418 | |
419 this.baseline_deltas_td_.innerHTML = deltaStr + ": " + percentStr; | |
420 } | |
421 | |
422 this.updateRuler_(evt); | |
423 this.updateCursor_(); | |
424 }; | |
425 | |
426 Plotter.incrementNumericCLNumber = function(value) { | |
427 if (isNaN(value)) | |
428 return value; | |
429 return value + 1; | |
430 }; | |
431 | |
432 Plotter.prototype.onMouseClick_ = function(evt) { | |
433 // Shift-click controls the horizontal reference line. | |
434 if (evt.shiftKey) { | |
435 if (this.horizontal_marker_) { | |
436 this.horizontal_marker_.remove_(); | |
437 } | |
438 var obj = this.canvas_elt_; | |
439 var offsetTop = 0; | |
440 do { | |
441 offsetTop += obj.offsetTop; | |
442 } while (obj = obj.offsetParent); | |
443 var canvasY = evt.clientY + document.body.scrollTop - offsetTop; | |
444 this.horizontal_marker_ = new HorizontalMarker( | |
445 this.canvas_elt_, evt.clientY + document.body.scrollTop - offsetTop, | |
446 this.coordinates.yValue(canvasY)); | |
447 | |
448 // Insert before cursor node, otherwise it catches clicks. | |
449 this.cursor_div_.parentNode.insertBefore( | |
450 this.horizontal_marker_.markerDiv_, this.cursor_div_); | |
451 } else { | |
452 var index = this.current_index_; | |
453 var m = this.marker_div_; | |
454 var c = this.cursor_div_; | |
455 m.style.top = c.style.top; | |
456 m.style.left = c.style.left; | |
457 m.style.width = c.style.width; | |
458 m.style.height = c.style.height; | |
459 if ("onclick" in this) { | |
460 var this_x = this.clNumbers_[index]; | |
461 // TODO(tonyg): When the clNumber is not numeric, the range includes one | |
462 // too many revisions on the starting side. | |
463 var prev_x = this_x; | |
464 if (index > 0) { | |
465 prev_x_source = this.clNumbers_[index-1]; | |
466 if (typeof prev_x_source == 'object') { | |
467 prev_x = {}; | |
468 for (var key in prev_x_source) { | |
469 prev_x[key] = Plotter.incrementNumericCLNumber(prev_x_source[key]); | |
470 } | |
471 } else { | |
472 prev_x = Plotter.incrementNumericCLNumber(prev_x_source); | |
473 } | |
474 } | |
475 this.onclick(prev_x, this_x); | |
476 } | |
477 } | |
478 }; | |
479 | |
480 Plotter.prototype.canvas = function() { | |
481 var canvas = document.createElement("CANVAS"); | |
482 canvas.setAttribute("class", "plot"); | |
483 canvas.setAttribute("width", this.coordinates.widthMax); | |
484 canvas.setAttribute("height", this.coordinates.heightMax); | |
485 canvas.plotter = this; | |
486 return canvas; | |
487 }; | |
488 | |
489 Plotter.prototype.ruler = function() { | |
490 var ruler = document.createElement("DIV"); | |
491 ruler.setAttribute("class", "plot-ruler"); | |
492 ruler.style.borderBottom = "1px dotted black"; | |
493 ruler.style.position = "absolute"; | |
494 ruler.style.left = "-2px"; | |
495 ruler.style.top = "-2px"; | |
496 ruler.style.width = "0px"; | |
497 ruler.style.height = "0px"; | |
498 return ruler; | |
499 }; | |
500 | |
501 Plotter.prototype.graduations = function() { | |
502 // Don't allow a graduation in the bottom 5% of the chart | |
503 // or the number label would overflow the chart bounds. | |
504 var yMin = this.coordinates.yMinValue + .05 * this.coordinates.yValueRange(); | |
505 var yRange = this.coordinates.yMaxValue - yMin; | |
506 | |
507 // Use the largest scale that fits 3 or more graduations. | |
508 // We allow scales of [...,500, 250, 100, 50, 25, 10,...]. | |
509 var scale = 5000000000; | |
510 while (scale) { | |
511 if (Math.floor(yRange / scale) > 2) break; // 5s | |
512 scale /= 2; | |
513 if (Math.floor(yRange / scale) > 2) break; // 2.5s | |
514 scale /= 2.5; | |
515 if (Math.floor(yRange / scale) > 2) break; // 1s | |
516 scale /= 2; | |
517 } | |
518 | |
519 var graduationPosition = yMin + (scale - yMin % scale); | |
520 var graduationDivs = []; | |
521 while (graduationPosition < this.coordinates.yMaxValue) { | |
522 var graduation = document.createElement("DIV"); | |
523 var canvasPosition = this.coordinates.yPoints(graduationPosition); | |
524 graduation.style.borderTop = "1px dashed rgba(0,0,0,.08)"; | |
525 graduation.style.position = "absolute"; | |
526 graduation.style.left = this.canvas_elt_.offsetLeft + "px"; | |
527 graduation.style.top = canvasPosition + this.canvas_elt_.offsetTop + "px"; | |
528 graduation.style.width = | |
529 this.canvas_elt_.offsetWidth - 4 + "px"; | |
530 graduation.style.paddingLeft = "4px"; | |
531 graduation.style.color = "rgba(0,0,0,.4)"; | |
532 graduation.style.fontSize = "9px"; | |
533 graduation.style.paddingTop = "0"; | |
534 graduation.style.zIndex = "-1"; | |
535 graduation.innerHTML = addCommas(graduationPosition); | |
536 graduationDivs.push(graduation); | |
537 graduationPosition += scale; | |
538 } | |
539 return graduationDivs; | |
540 }; | |
541 | |
542 Plotter.prototype.coordinates_ = function() { | |
543 var coordinatesDiv = document.createElement("DIV"); | |
544 var fontSize = Math.max(0.8, this.width / 400 * 0.75); | |
545 fontSize = Math.min(1.0, fontSize); | |
546 | |
547 var table = document.createElement("table"); | |
548 coordinatesDiv.appendChild(table); | |
549 table.style.cssText = "border=0; width=100%; font-size:" + fontSize + "em;"; | |
550 var tr = document.createElement("tr"); | |
551 table.appendChild(tr); | |
552 var td = document.createElement("td"); | |
553 tr.appendChild(td); | |
554 td.className = "legend"; | |
555 td.innerHTML = "Legend: "; | |
556 | |
557 for (var i = 0; i < this.dataDescription_.length; i++) { | |
558 if (i > 0) | |
559 td.appendChild(document.createTextNode(", ")); | |
560 var legendItem = document.createElement("a"); | |
561 td.appendChild(legendItem); | |
562 legendItem.className = "legend_item"; | |
563 legendItem.href = "#"; | |
564 legendItem.style.cssText = "text-decoration: none; color: " + | |
565 this.getDataColor(i); | |
566 var obj = this; | |
567 legendItem.onclick = ( | |
568 function(){ | |
569 var index = i; | |
570 return function() { | |
571 this.style.fontWeight = (obj.toggleSelection(index)) ? | |
572 "bold" : "normal"; | |
573 return false; | |
574 }; | |
575 })(); | |
576 legendItem.innerHTML = this.dataDescription_[i]; | |
577 } | |
578 | |
579 this.coordinates_td_ = document.createElement("td"); | |
580 this.coordinates_td_.innerHTML = "<i>move mouse over graph</i>"; | |
581 tr.appendChild(this.coordinates_td_); | |
582 | |
583 this.baseline_deltas_td_ = document.createElement("td"); | |
584 this.baseline_deltas_td_.style.color = HorizontalMarker.COLOR; | |
585 tr.appendChild(this.baseline_deltas_td_); | |
586 | |
587 return coordinatesDiv; | |
588 }; | |
589 | |
590 Plotter.prototype.makeColor = function(i) { | |
591 var index = i % this.colors.length; | |
592 return "rgb(" + this.colors[index][0] + "," + | |
593 this.colors[index][1] + "," + | |
594 this.colors[index][2] + ")"; | |
595 }; | |
596 | |
597 Plotter.prototype.getDataColor = function(i) { | |
598 if (this.dataColors_[i]) { | |
599 return this.dataColors_[i]; | |
600 } else { | |
601 return this.makeColor(i); | |
602 } | |
603 }; | |
604 | |
605 Plotter.prototype.log = function(val) { | |
606 document.getElementById('log').appendChild( | |
607 document.createTextNode(val + '\n')); | |
608 }; | |
OLD | NEW |