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2954 mathias 1
/*!
2
 * Chart.js
3
 * http://chartjs.org/
4
 * Version: 1.1.1
5
 *
6
 * Copyright 2015 Nick Downie
7
 * Released under the MIT license
8
 * https://github.com/nnnick/Chart.js/blob/master/LICENSE.md
9
 */
10
 
11
 
12
(function(){
13
 
14
	"use strict";
15
 
16
	//Declare root variable - window in the browser, global on the server
17
	var root = this,
18
		previous = root.Chart;
19
 
20
	//Occupy the global variable of Chart, and create a simple base class
21
	var Chart = function(context){
22
		var chart = this;
23
		this.canvas = context.canvas;
24
 
25
		this.ctx = context;
26
 
27
		//Variables global to the chart
28
		var computeDimension = function(element,dimension)
29
		{
30
			if (element['offset'+dimension])
31
			{
32
				return element['offset'+dimension];
33
			}
34
			else
35
			{
36
				return document.defaultView.getComputedStyle(element).getPropertyValue(dimension);
37
			}
38
		};
39
 
40
		var width = this.width = computeDimension(context.canvas,'Width') || context.canvas.width;
41
		var height = this.height = computeDimension(context.canvas,'Height') || context.canvas.height;
42
 
43
		this.aspectRatio = this.width / this.height;
44
		//High pixel density displays - multiply the size of the canvas height/width by the device pixel ratio, then scale.
45
		helpers.retinaScale(this);
46
 
47
		return this;
48
	};
49
	//Globally expose the defaults to allow for user updating/changing
50
	Chart.defaults = {
51
		global: {
52
			// Boolean - Whether to animate the chart
53
			animation: true,
54
 
55
			// Number - Number of animation steps
56
			animationSteps: 60,
57
 
58
			// String - Animation easing effect
59
			animationEasing: "easeOutQuart",
60
 
61
			// Boolean - If we should show the scale at all
62
			showScale: true,
63
 
64
			// Boolean - If we want to override with a hard coded scale
65
			scaleOverride: false,
66
 
67
			// ** Required if scaleOverride is true **
68
			// Number - The number of steps in a hard coded scale
69
			scaleSteps: null,
70
			// Number - The value jump in the hard coded scale
71
			scaleStepWidth: null,
72
			// Number - The scale starting value
73
			scaleStartValue: null,
74
 
75
			// String - Colour of the scale line
76
			scaleLineColor: "rgba(0,0,0,.1)",
77
 
78
			// Number - Pixel width of the scale line
79
			scaleLineWidth: 1,
80
 
81
			// Boolean - Whether to show labels on the scale
82
			scaleShowLabels: true,
83
 
84
			// Interpolated JS string - can access value
85
			scaleLabel: "<%=value%>",
86
 
87
			// Boolean - Whether the scale should stick to integers, and not show any floats even if drawing space is there
88
			scaleIntegersOnly: true,
89
 
90
			// Boolean - Whether the scale should start at zero, or an order of magnitude down from the lowest value
91
			scaleBeginAtZero: false,
92
 
93
			// String - Scale label font declaration for the scale label
94
			scaleFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",
95
 
96
			// Number - Scale label font size in pixels
97
			scaleFontSize: 12,
98
 
99
			// String - Scale label font weight style
100
			scaleFontStyle: "normal",
101
 
102
			// String - Scale label font colour
103
			scaleFontColor: "#666",
104
 
105
			// Boolean - whether or not the chart should be responsive and resize when the browser does.
106
			responsive: false,
107
 
108
			// Boolean - whether to maintain the starting aspect ratio or not when responsive, if set to false, will take up entire container
109
			maintainAspectRatio: true,
110
 
111
			// Boolean - Determines whether to draw tooltips on the canvas or not - attaches events to touchmove & mousemove
112
			showTooltips: true,
113
 
114
			// Boolean - Determines whether to draw built-in tooltip or call custom tooltip function
115
			customTooltips: false,
116
 
117
			// Array - Array of string names to attach tooltip events
118
			tooltipEvents: ["mousemove", "touchstart", "touchmove", "mouseout"],
119
 
120
			// String - Tooltip background colour
121
			tooltipFillColor: "rgba(0,0,0,0.8)",
122
 
123
			// String - Tooltip label font declaration for the scale label
124
			tooltipFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",
125
 
126
			// Number - Tooltip label font size in pixels
127
			tooltipFontSize: 14,
128
 
129
			// String - Tooltip font weight style
130
			tooltipFontStyle: "normal",
131
 
132
			// String - Tooltip label font colour
133
			tooltipFontColor: "#fff",
134
 
135
			// String - Tooltip title font declaration for the scale label
136
			tooltipTitleFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",
137
 
138
			// Number - Tooltip title font size in pixels
139
			tooltipTitleFontSize: 14,
140
 
141
			// String - Tooltip title font weight style
142
			tooltipTitleFontStyle: "bold",
143
 
144
			// String - Tooltip title font colour
145
			tooltipTitleFontColor: "#fff",
146
 
147
			// String - Tooltip title template
148
			tooltipTitleTemplate: "<%= label%>",
149
 
150
			// Number - pixel width of padding around tooltip text
151
			tooltipYPadding: 6,
152
 
153
			// Number - pixel width of padding around tooltip text
154
			tooltipXPadding: 6,
155
 
156
			// Number - Size of the caret on the tooltip
157
			tooltipCaretSize: 8,
158
 
159
			// Number - Pixel radius of the tooltip border
160
			tooltipCornerRadius: 6,
161
 
162
			// Number - Pixel offset from point x to tooltip edge
163
			tooltipXOffset: 10,
164
 
165
			// String - Template string for single tooltips
166
			tooltipTemplate: "<%if (label){%><%=label%>: <%}%><%= value %>",
167
 
168
			// String - Template string for single tooltips
169
			multiTooltipTemplate: "<%= datasetLabel %>: <%= value %>",
170
 
171
			// String - Colour behind the legend colour block
172
			multiTooltipKeyBackground: '#fff',
173
 
174
			// Array - A list of colors to use as the defaults
175
			segmentColorDefault: ["#A6CEE3", "#1F78B4", "#B2DF8A", "#33A02C", "#FB9A99", "#E31A1C", "#FDBF6F", "#FF7F00", "#CAB2D6", "#6A3D9A", "#B4B482", "#B15928" ],
176
 
177
			// Array - A list of highlight colors to use as the defaults
178
			segmentHighlightColorDefaults: [ "#CEF6FF", "#47A0DC", "#DAFFB2", "#5BC854", "#FFC2C1", "#FF4244", "#FFE797", "#FFA728", "#F2DAFE", "#9265C2", "#DCDCAA", "#D98150" ],
179
 
180
			// Function - Will fire on animation progression.
181
			onAnimationProgress: function(){},
182
 
183
			// Function - Will fire on animation completion.
184
			onAnimationComplete: function(){}
185
 
186
		}
187
	};
188
 
189
	//Create a dictionary of chart types, to allow for extension of existing types
190
	Chart.types = {};
191
 
192
	//Global Chart helpers object for utility methods and classes
193
	var helpers = Chart.helpers = {};
194
 
195
		//-- Basic js utility methods
196
	var each = helpers.each = function(loopable,callback,self){
197
			var additionalArgs = Array.prototype.slice.call(arguments, 3);
198
			// Check to see if null or undefined firstly.
199
			if (loopable){
200
				if (loopable.length === +loopable.length){
201
					var i;
202
					for (i=0; i<loopable.length; i++){
203
						callback.apply(self,[loopable[i], i].concat(additionalArgs));
204
					}
205
				}
206
				else{
207
					for (var item in loopable){
208
						callback.apply(self,[loopable[item],item].concat(additionalArgs));
209
					}
210
				}
211
			}
212
		},
213
		clone = helpers.clone = function(obj){
214
			var objClone = {};
215
			each(obj,function(value,key){
216
				if (obj.hasOwnProperty(key)){
217
					objClone[key] = value;
218
				}
219
			});
220
			return objClone;
221
		},
222
		extend = helpers.extend = function(base){
223
			each(Array.prototype.slice.call(arguments,1), function(extensionObject) {
224
				each(extensionObject,function(value,key){
225
					if (extensionObject.hasOwnProperty(key)){
226
						base[key] = value;
227
					}
228
				});
229
			});
230
			return base;
231
		},
232
		merge = helpers.merge = function(base,master){
233
			//Merge properties in left object over to a shallow clone of object right.
234
			var args = Array.prototype.slice.call(arguments,0);
235
			args.unshift({});
236
			return extend.apply(null, args);
237
		},
238
		indexOf = helpers.indexOf = function(arrayToSearch, item){
239
			if (Array.prototype.indexOf) {
240
				return arrayToSearch.indexOf(item);
241
			}
242
			else{
243
				for (var i = 0; i < arrayToSearch.length; i++) {
244
					if (arrayToSearch[i] === item) return i;
245
				}
246
				return -1;
247
			}
248
		},
249
		where = helpers.where = function(collection, filterCallback){
250
			var filtered = [];
251
 
252
			helpers.each(collection, function(item){
253
				if (filterCallback(item)){
254
					filtered.push(item);
255
				}
256
			});
257
 
258
			return filtered;
259
		},
260
		findNextWhere = helpers.findNextWhere = function(arrayToSearch, filterCallback, startIndex){
261
			// Default to start of the array
262
			if (!startIndex){
263
				startIndex = -1;
264
			}
265
			for (var i = startIndex + 1; i < arrayToSearch.length; i++) {
266
				var currentItem = arrayToSearch[i];
267
				if (filterCallback(currentItem)){
268
					return currentItem;
269
				}
270
			}
271
		},
272
		findPreviousWhere = helpers.findPreviousWhere = function(arrayToSearch, filterCallback, startIndex){
273
			// Default to end of the array
274
			if (!startIndex){
275
				startIndex = arrayToSearch.length;
276
			}
277
			for (var i = startIndex - 1; i >= 0; i--) {
278
				var currentItem = arrayToSearch[i];
279
				if (filterCallback(currentItem)){
280
					return currentItem;
281
				}
282
			}
283
		},
284
		inherits = helpers.inherits = function(extensions){
285
			//Basic javascript inheritance based on the model created in Backbone.js
286
			var parent = this;
287
			var ChartElement = (extensions && extensions.hasOwnProperty("constructor")) ? extensions.constructor : function(){ return parent.apply(this, arguments); };
288
 
289
			var Surrogate = function(){ this.constructor = ChartElement;};
290
			Surrogate.prototype = parent.prototype;
291
			ChartElement.prototype = new Surrogate();
292
 
293
			ChartElement.extend = inherits;
294
 
295
			if (extensions) extend(ChartElement.prototype, extensions);
296
 
297
			ChartElement.__super__ = parent.prototype;
298
 
299
			return ChartElement;
300
		},
301
		noop = helpers.noop = function(){},
302
		uid = helpers.uid = (function(){
303
			var id=0;
304
			return function(){
305
				return "chart-" + id++;
306
			};
307
		})(),
308
		warn = helpers.warn = function(str){
309
			//Method for warning of errors
310
			if (window.console && typeof window.console.warn === "function") console.warn(str);
311
		},
312
		amd = helpers.amd = (typeof define === 'function' && define.amd),
313
		//-- Math methods
314
		isNumber = helpers.isNumber = function(n){
315
			return !isNaN(parseFloat(n)) && isFinite(n);
316
		},
317
		max = helpers.max = function(array){
318
			return Math.max.apply( Math, array );
319
		},
320
		min = helpers.min = function(array){
321
			return Math.min.apply( Math, array );
322
		},
323
		cap = helpers.cap = function(valueToCap,maxValue,minValue){
324
			if(isNumber(maxValue)) {
325
				if( valueToCap > maxValue ) {
326
					return maxValue;
327
				}
328
			}
329
			else if(isNumber(minValue)){
330
				if ( valueToCap < minValue ){
331
					return minValue;
332
				}
333
			}
334
			return valueToCap;
335
		},
336
		getDecimalPlaces = helpers.getDecimalPlaces = function(num){
337
			if (num%1!==0 && isNumber(num)){
338
				var s = num.toString();
339
				if(s.indexOf("e-") < 0){
340
					// no exponent, e.g. 0.01
341
					return s.split(".")[1].length;
342
				}
343
				else if(s.indexOf(".") < 0) {
344
					// no decimal point, e.g. 1e-9
345
					return parseInt(s.split("e-")[1]);
346
				}
347
				else {
348
					// exponent and decimal point, e.g. 1.23e-9
349
					var parts = s.split(".")[1].split("e-");
350
					return parts[0].length + parseInt(parts[1]);
351
				}
352
			}
353
			else {
354
				return 0;
355
			}
356
		},
357
		toRadians = helpers.radians = function(degrees){
358
			return degrees * (Math.PI/180);
359
		},
360
		// Gets the angle from vertical upright to the point about a centre.
361
		getAngleFromPoint = helpers.getAngleFromPoint = function(centrePoint, anglePoint){
362
			var distanceFromXCenter = anglePoint.x - centrePoint.x,
363
				distanceFromYCenter = anglePoint.y - centrePoint.y,
364
				radialDistanceFromCenter = Math.sqrt( distanceFromXCenter * distanceFromXCenter + distanceFromYCenter * distanceFromYCenter);
365
 
366
 
367
			var angle = Math.PI * 2 + Math.atan2(distanceFromYCenter, distanceFromXCenter);
368
 
369
			//If the segment is in the top left quadrant, we need to add another rotation to the angle
370
			if (distanceFromXCenter < 0 && distanceFromYCenter < 0){
371
				angle += Math.PI*2;
372
			}
373
 
374
			return {
375
				angle: angle,
376
				distance: radialDistanceFromCenter
377
			};
378
		},
379
		aliasPixel = helpers.aliasPixel = function(pixelWidth){
380
			return (pixelWidth % 2 === 0) ? 0 : 0.5;
381
		},
382
		splineCurve = helpers.splineCurve = function(FirstPoint,MiddlePoint,AfterPoint,t){
383
			//Props to Rob Spencer at scaled innovation for his post on splining between points
384
			//http://scaledinnovation.com/analytics/splines/aboutSplines.html
385
			var d01=Math.sqrt(Math.pow(MiddlePoint.x-FirstPoint.x,2)+Math.pow(MiddlePoint.y-FirstPoint.y,2)),
386
				d12=Math.sqrt(Math.pow(AfterPoint.x-MiddlePoint.x,2)+Math.pow(AfterPoint.y-MiddlePoint.y,2)),
387
				fa=t*d01/(d01+d12),// scaling factor for triangle Ta
388
				fb=t*d12/(d01+d12);
389
			return {
390
				inner : {
391
					x : MiddlePoint.x-fa*(AfterPoint.x-FirstPoint.x),
392
					y : MiddlePoint.y-fa*(AfterPoint.y-FirstPoint.y)
393
				},
394
				outer : {
395
					x: MiddlePoint.x+fb*(AfterPoint.x-FirstPoint.x),
396
					y : MiddlePoint.y+fb*(AfterPoint.y-FirstPoint.y)
397
				}
398
			};
399
		},
400
		calculateOrderOfMagnitude = helpers.calculateOrderOfMagnitude = function(val){
401
			return Math.floor(Math.log(val) / Math.LN10);
402
		},
403
		calculateScaleRange = helpers.calculateScaleRange = function(valuesArray, drawingSize, textSize, startFromZero, integersOnly){
404
 
405
			//Set a minimum step of two - a point at the top of the graph, and a point at the base
406
			var minSteps = 2,
407
				maxSteps = Math.floor(drawingSize/(textSize * 1.5)),
408
				skipFitting = (minSteps >= maxSteps);
409
 
410
			// Filter out null values since these would min() to zero
411
			var values = [];
412
			each(valuesArray, function( v ){
413
				v == null || values.push( v );
414
			});
415
			var minValue = min(values),
416
			    maxValue = max(values);
417
 
418
			// We need some degree of separation here to calculate the scales if all the values are the same
419
			// Adding/minusing 0.5 will give us a range of 1.
420
			if (maxValue === minValue){
421
				maxValue += 0.5;
422
				// So we don't end up with a graph with a negative start value if we've said always start from zero
423
				if (minValue >= 0.5 && !startFromZero){
424
					minValue -= 0.5;
425
				}
426
				else{
427
					// Make up a whole number above the values
428
					maxValue += 0.5;
429
				}
430
			}
431
 
432
			var	valueRange = Math.abs(maxValue - minValue),
433
				rangeOrderOfMagnitude = calculateOrderOfMagnitude(valueRange),
434
				graphMax = Math.ceil(maxValue / (1 * Math.pow(10, rangeOrderOfMagnitude))) * Math.pow(10, rangeOrderOfMagnitude),
435
				graphMin = (startFromZero) ? 0 : Math.floor(minValue / (1 * Math.pow(10, rangeOrderOfMagnitude))) * Math.pow(10, rangeOrderOfMagnitude),
436
				graphRange = graphMax - graphMin,
437
				stepValue = Math.pow(10, rangeOrderOfMagnitude),
438
				numberOfSteps = Math.round(graphRange / stepValue);
439
 
440
			//If we have more space on the graph we'll use it to give more definition to the data
441
			while((numberOfSteps > maxSteps || (numberOfSteps * 2) < maxSteps) && !skipFitting) {
442
				if(numberOfSteps > maxSteps){
443
					stepValue *=2;
444
					numberOfSteps = Math.round(graphRange/stepValue);
445
					// Don't ever deal with a decimal number of steps - cancel fitting and just use the minimum number of steps.
446
					if (numberOfSteps % 1 !== 0){
447
						skipFitting = true;
448
					}
449
				}
450
				//We can fit in double the amount of scale points on the scale
451
				else{
452
					//If user has declared ints only, and the step value isn't a decimal
453
					if (integersOnly && rangeOrderOfMagnitude >= 0){
454
						//If the user has said integers only, we need to check that making the scale more granular wouldn't make it a float
455
						if(stepValue/2 % 1 === 0){
456
							stepValue /=2;
457
							numberOfSteps = Math.round(graphRange/stepValue);
458
						}
459
						//If it would make it a float break out of the loop
460
						else{
461
							break;
462
						}
463
					}
464
					//If the scale doesn't have to be an int, make the scale more granular anyway.
465
					else{
466
						stepValue /=2;
467
						numberOfSteps = Math.round(graphRange/stepValue);
468
					}
469
 
470
				}
471
			}
472
 
473
			if (skipFitting){
474
				numberOfSteps = minSteps;
475
				stepValue = graphRange / numberOfSteps;
476
			}
477
 
478
			return {
479
				steps : numberOfSteps,
480
				stepValue : stepValue,
481
				min : graphMin,
482
				max	: graphMin + (numberOfSteps * stepValue)
483
			};
484
 
485
		},
486
		/* jshint ignore:start */
487
		// Blows up jshint errors based on the new Function constructor
488
		//Templating methods
489
		//Javascript micro templating by John Resig - source at http://ejohn.org/blog/javascript-micro-templating/
490
		template = helpers.template = function(templateString, valuesObject){
491
 
492
			// If templateString is function rather than string-template - call the function for valuesObject
493
 
494
			if(templateString instanceof Function){
495
			 	return templateString(valuesObject);
496
		 	}
497
 
498
			var cache = {};
499
			function tmpl(str, data){
500
				// Figure out if we're getting a template, or if we need to
501
				// load the template - and be sure to cache the result.
502
				var fn = !/\W/.test(str) ?
503
				cache[str] = cache[str] :
504
 
505
				// Generate a reusable function that will serve as a template
506
				// generator (and which will be cached).
507
				new Function("obj",
508
					"var p=[],print=function(){p.push.apply(p,arguments);};" +
509
 
510
					// Introduce the data as local variables using with(){}
511
					"with(obj){p.push('" +
512
 
513
					// Convert the template into pure JavaScript
514
					str
515
						.replace(/[\r\t\n]/g, " ")
516
						.split("<%").join("\t")
517
						.replace(/((^|%>)[^\t]*)'/g, "$1\r")
518
						.replace(/\t=(.*?)%>/g, "',$1,'")
519
						.split("\t").join("');")
520
						.split("%>").join("p.push('")
521
						.split("\r").join("\\'") +
522
					"');}return p.join('');"
523
				);
524
 
525
				// Provide some basic currying to the user
526
				return data ? fn( data ) : fn;
527
			}
528
			return tmpl(templateString,valuesObject);
529
		},
530
		/* jshint ignore:end */
531
		generateLabels = helpers.generateLabels = function(templateString,numberOfSteps,graphMin,stepValue){
532
			var labelsArray = new Array(numberOfSteps);
533
			if (templateString){
534
				each(labelsArray,function(val,index){
535
					labelsArray[index] = template(templateString,{value: (graphMin + (stepValue*(index+1)))});
536
				});
537
			}
538
			return labelsArray;
539
		},
540
		//--Animation methods
541
		//Easing functions adapted from Robert Penner's easing equations
542
		//http://www.robertpenner.com/easing/
543
		easingEffects = helpers.easingEffects = {
544
			linear: function (t) {
545
				return t;
546
			},
547
			easeInQuad: function (t) {
548
				return t * t;
549
			},
550
			easeOutQuad: function (t) {
551
				return -1 * t * (t - 2);
552
			},
553
			easeInOutQuad: function (t) {
554
				if ((t /= 1 / 2) < 1){
555
					return 1 / 2 * t * t;
556
				}
557
				return -1 / 2 * ((--t) * (t - 2) - 1);
558
			},
559
			easeInCubic: function (t) {
560
				return t * t * t;
561
			},
562
			easeOutCubic: function (t) {
563
				return 1 * ((t = t / 1 - 1) * t * t + 1);
564
			},
565
			easeInOutCubic: function (t) {
566
				if ((t /= 1 / 2) < 1){
567
					return 1 / 2 * t * t * t;
568
				}
569
				return 1 / 2 * ((t -= 2) * t * t + 2);
570
			},
571
			easeInQuart: function (t) {
572
				return t * t * t * t;
573
			},
574
			easeOutQuart: function (t) {
575
				return -1 * ((t = t / 1 - 1) * t * t * t - 1);
576
			},
577
			easeInOutQuart: function (t) {
578
				if ((t /= 1 / 2) < 1){
579
					return 1 / 2 * t * t * t * t;
580
				}
581
				return -1 / 2 * ((t -= 2) * t * t * t - 2);
582
			},
583
			easeInQuint: function (t) {
584
				return 1 * (t /= 1) * t * t * t * t;
585
			},
586
			easeOutQuint: function (t) {
587
				return 1 * ((t = t / 1 - 1) * t * t * t * t + 1);
588
			},
589
			easeInOutQuint: function (t) {
590
				if ((t /= 1 / 2) < 1){
591
					return 1 / 2 * t * t * t * t * t;
592
				}
593
				return 1 / 2 * ((t -= 2) * t * t * t * t + 2);
594
			},
595
			easeInSine: function (t) {
596
				return -1 * Math.cos(t / 1 * (Math.PI / 2)) + 1;
597
			},
598
			easeOutSine: function (t) {
599
				return 1 * Math.sin(t / 1 * (Math.PI / 2));
600
			},
601
			easeInOutSine: function (t) {
602
				return -1 / 2 * (Math.cos(Math.PI * t / 1) - 1);
603
			},
604
			easeInExpo: function (t) {
605
				return (t === 0) ? 1 : 1 * Math.pow(2, 10 * (t / 1 - 1));
606
			},
607
			easeOutExpo: function (t) {
608
				return (t === 1) ? 1 : 1 * (-Math.pow(2, -10 * t / 1) + 1);
609
			},
610
			easeInOutExpo: function (t) {
611
				if (t === 0){
612
					return 0;
613
				}
614
				if (t === 1){
615
					return 1;
616
				}
617
				if ((t /= 1 / 2) < 1){
618
					return 1 / 2 * Math.pow(2, 10 * (t - 1));
619
				}
620
				return 1 / 2 * (-Math.pow(2, -10 * --t) + 2);
621
			},
622
			easeInCirc: function (t) {
623
				if (t >= 1){
624
					return t;
625
				}
626
				return -1 * (Math.sqrt(1 - (t /= 1) * t) - 1);
627
			},
628
			easeOutCirc: function (t) {
629
				return 1 * Math.sqrt(1 - (t = t / 1 - 1) * t);
630
			},
631
			easeInOutCirc: function (t) {
632
				if ((t /= 1 / 2) < 1){
633
					return -1 / 2 * (Math.sqrt(1 - t * t) - 1);
634
				}
635
				return 1 / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1);
636
			},
637
			easeInElastic: function (t) {
638
				var s = 1.70158;
639
				var p = 0;
640
				var a = 1;
641
				if (t === 0){
642
					return 0;
643
				}
644
				if ((t /= 1) == 1){
645
					return 1;
646
				}
647
				if (!p){
648
					p = 1 * 0.3;
649
				}
650
				if (a < Math.abs(1)) {
651
					a = 1;
652
					s = p / 4;
653
				} else{
654
					s = p / (2 * Math.PI) * Math.asin(1 / a);
655
				}
656
				return -(a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p));
657
			},
658
			easeOutElastic: function (t) {
659
				var s = 1.70158;
660
				var p = 0;
661
				var a = 1;
662
				if (t === 0){
663
					return 0;
664
				}
665
				if ((t /= 1) == 1){
666
					return 1;
667
				}
668
				if (!p){
669
					p = 1 * 0.3;
670
				}
671
				if (a < Math.abs(1)) {
672
					a = 1;
673
					s = p / 4;
674
				} else{
675
					s = p / (2 * Math.PI) * Math.asin(1 / a);
676
				}
677
				return a * Math.pow(2, -10 * t) * Math.sin((t * 1 - s) * (2 * Math.PI) / p) + 1;
678
			},
679
			easeInOutElastic: function (t) {
680
				var s = 1.70158;
681
				var p = 0;
682
				var a = 1;
683
				if (t === 0){
684
					return 0;
685
				}
686
				if ((t /= 1 / 2) == 2){
687
					return 1;
688
				}
689
				if (!p){
690
					p = 1 * (0.3 * 1.5);
691
				}
692
				if (a < Math.abs(1)) {
693
					a = 1;
694
					s = p / 4;
695
				} else {
696
					s = p / (2 * Math.PI) * Math.asin(1 / a);
697
				}
698
				if (t < 1){
699
					return -0.5 * (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p));}
700
				return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p) * 0.5 + 1;
701
			},
702
			easeInBack: function (t) {
703
				var s = 1.70158;
704
				return 1 * (t /= 1) * t * ((s + 1) * t - s);
705
			},
706
			easeOutBack: function (t) {
707
				var s = 1.70158;
708
				return 1 * ((t = t / 1 - 1) * t * ((s + 1) * t + s) + 1);
709
			},
710
			easeInOutBack: function (t) {
711
				var s = 1.70158;
712
				if ((t /= 1 / 2) < 1){
713
					return 1 / 2 * (t * t * (((s *= (1.525)) + 1) * t - s));
714
				}
715
				return 1 / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2);
716
			},
717
			easeInBounce: function (t) {
718
				return 1 - easingEffects.easeOutBounce(1 - t);
719
			},
720
			easeOutBounce: function (t) {
721
				if ((t /= 1) < (1 / 2.75)) {
722
					return 1 * (7.5625 * t * t);
723
				} else if (t < (2 / 2.75)) {
724
					return 1 * (7.5625 * (t -= (1.5 / 2.75)) * t + 0.75);
725
				} else if (t < (2.5 / 2.75)) {
726
					return 1 * (7.5625 * (t -= (2.25 / 2.75)) * t + 0.9375);
727
				} else {
728
					return 1 * (7.5625 * (t -= (2.625 / 2.75)) * t + 0.984375);
729
				}
730
			},
731
			easeInOutBounce: function (t) {
732
				if (t < 1 / 2){
733
					return easingEffects.easeInBounce(t * 2) * 0.5;
734
				}
735
				return easingEffects.easeOutBounce(t * 2 - 1) * 0.5 + 1 * 0.5;
736
			}
737
		},
738
		//Request animation polyfill - http://www.paulirish.com/2011/requestanimationframe-for-smart-animating/
739
		requestAnimFrame = helpers.requestAnimFrame = (function(){
740
			return window.requestAnimationFrame ||
741
				window.webkitRequestAnimationFrame ||
742
				window.mozRequestAnimationFrame ||
743
				window.oRequestAnimationFrame ||
744
				window.msRequestAnimationFrame ||
745
				function(callback) {
746
					return window.setTimeout(callback, 1000 / 60);
747
				};
748
		})(),
749
		cancelAnimFrame = helpers.cancelAnimFrame = (function(){
750
			return window.cancelAnimationFrame ||
751
				window.webkitCancelAnimationFrame ||
752
				window.mozCancelAnimationFrame ||
753
				window.oCancelAnimationFrame ||
754
				window.msCancelAnimationFrame ||
755
				function(callback) {
756
					return window.clearTimeout(callback, 1000 / 60);
757
				};
758
		})(),
759
		animationLoop = helpers.animationLoop = function(callback,totalSteps,easingString,onProgress,onComplete,chartInstance){
760
 
761
			var currentStep = 0,
762
				easingFunction = easingEffects[easingString] || easingEffects.linear;
763
 
764
			var animationFrame = function(){
765
				currentStep++;
766
				var stepDecimal = currentStep/totalSteps;
767
				var easeDecimal = easingFunction(stepDecimal);
768
 
769
				callback.call(chartInstance,easeDecimal,stepDecimal, currentStep);
770
				onProgress.call(chartInstance,easeDecimal,stepDecimal);
771
				if (currentStep < totalSteps){
772
					chartInstance.animationFrame = requestAnimFrame(animationFrame);
773
				} else{
774
					onComplete.apply(chartInstance);
775
				}
776
			};
777
			requestAnimFrame(animationFrame);
778
		},
779
		//-- DOM methods
780
		getRelativePosition = helpers.getRelativePosition = function(evt){
781
			var mouseX, mouseY;
782
			var e = evt.originalEvent || evt,
783
				canvas = evt.currentTarget || evt.srcElement,
784
				boundingRect = canvas.getBoundingClientRect();
785
 
786
			if (e.touches){
787
				mouseX = e.touches[0].clientX - boundingRect.left;
788
				mouseY = e.touches[0].clientY - boundingRect.top;
789
 
790
			}
791
			else{
792
				mouseX = e.clientX - boundingRect.left;
793
				mouseY = e.clientY - boundingRect.top;
794
			}
795
 
796
			return {
797
				x : mouseX,
798
				y : mouseY
799
			};
800
 
801
		},
802
		addEvent = helpers.addEvent = function(node,eventType,method){
803
			if (node.addEventListener){
804
				node.addEventListener(eventType,method);
805
			} else if (node.attachEvent){
806
				node.attachEvent("on"+eventType, method);
807
			} else {
808
				node["on"+eventType] = method;
809
			}
810
		},
811
		removeEvent = helpers.removeEvent = function(node, eventType, handler){
812
			if (node.removeEventListener){
813
				node.removeEventListener(eventType, handler, false);
814
			} else if (node.detachEvent){
815
				node.detachEvent("on"+eventType,handler);
816
			} else{
817
				node["on" + eventType] = noop;
818
			}
819
		},
820
		bindEvents = helpers.bindEvents = function(chartInstance, arrayOfEvents, handler){
821
			// Create the events object if it's not already present
822
			if (!chartInstance.events) chartInstance.events = {};
823
 
824
			each(arrayOfEvents,function(eventName){
825
				chartInstance.events[eventName] = function(){
826
					handler.apply(chartInstance, arguments);
827
				};
828
				addEvent(chartInstance.chart.canvas,eventName,chartInstance.events[eventName]);
829
			});
830
		},
831
		unbindEvents = helpers.unbindEvents = function (chartInstance, arrayOfEvents) {
832
			each(arrayOfEvents, function(handler,eventName){
833
				removeEvent(chartInstance.chart.canvas, eventName, handler);
834
			});
835
		},
836
		getMaximumWidth = helpers.getMaximumWidth = function(domNode){
837
			var container = domNode.parentNode,
838
			    padding = parseInt(getStyle(container, 'padding-left')) + parseInt(getStyle(container, 'padding-right'));
839
			// TODO = check cross browser stuff with this.
840
			return container ? container.clientWidth - padding : 0;
841
		},
842
		getMaximumHeight = helpers.getMaximumHeight = function(domNode){
843
			var container = domNode.parentNode,
844
			    padding = parseInt(getStyle(container, 'padding-bottom')) + parseInt(getStyle(container, 'padding-top'));
845
			// TODO = check cross browser stuff with this.
846
			return container ? container.clientHeight - padding : 0;
847
		},
848
		getStyle = helpers.getStyle = function (el, property) {
849
			return el.currentStyle ?
850
				el.currentStyle[property] :
851
				document.defaultView.getComputedStyle(el, null).getPropertyValue(property);
852
		},
853
		getMaximumSize = helpers.getMaximumSize = helpers.getMaximumWidth, // legacy support
854
		retinaScale = helpers.retinaScale = function(chart){
855
			var ctx = chart.ctx,
856
				width = chart.canvas.width,
857
				height = chart.canvas.height;
858
 
859
			if (window.devicePixelRatio) {
860
				ctx.canvas.style.width = width + "px";
861
				ctx.canvas.style.height = height + "px";
862
				ctx.canvas.height = height * window.devicePixelRatio;
863
				ctx.canvas.width = width * window.devicePixelRatio;
864
				ctx.scale(window.devicePixelRatio, window.devicePixelRatio);
865
			}
866
		},
867
		//-- Canvas methods
868
		clear = helpers.clear = function(chart){
869
			chart.ctx.clearRect(0,0,chart.width,chart.height);
870
		},
871
		fontString = helpers.fontString = function(pixelSize,fontStyle,fontFamily){
872
			return fontStyle + " " + pixelSize+"px " + fontFamily;
873
		},
874
		longestText = helpers.longestText = function(ctx,font,arrayOfStrings){
875
			ctx.font = font;
876
			var longest = 0;
877
			each(arrayOfStrings,function(string){
878
				var textWidth = ctx.measureText(string).width;
879
				longest = (textWidth > longest) ? textWidth : longest;
880
			});
881
			return longest;
882
		},
883
		drawRoundedRectangle = helpers.drawRoundedRectangle = function(ctx,x,y,width,height,radius){
884
			ctx.beginPath();
885
			ctx.moveTo(x + radius, y);
886
			ctx.lineTo(x + width - radius, y);
887
			ctx.quadraticCurveTo(x + width, y, x + width, y + radius);
888
			ctx.lineTo(x + width, y + height - radius);
889
			ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);
890
			ctx.lineTo(x + radius, y + height);
891
			ctx.quadraticCurveTo(x, y + height, x, y + height - radius);
892
			ctx.lineTo(x, y + radius);
893
			ctx.quadraticCurveTo(x, y, x + radius, y);
894
			ctx.closePath();
895
		};
896
 
897
 
898
	//Store a reference to each instance - allowing us to globally resize chart instances on window resize.
899
	//Destroy method on the chart will remove the instance of the chart from this reference.
900
	Chart.instances = {};
901
 
902
	Chart.Type = function(data,options,chart){
903
		this.options = options;
904
		this.chart = chart;
905
		this.id = uid();
906
		//Add the chart instance to the global namespace
907
		Chart.instances[this.id] = this;
908
 
909
		// Initialize is always called when a chart type is created
910
		// By default it is a no op, but it should be extended
911
		if (options.responsive){
912
			this.resize();
913
		}
914
		this.initialize.call(this,data);
915
	};
916
 
917
	//Core methods that'll be a part of every chart type
918
	extend(Chart.Type.prototype,{
919
		initialize : function(){return this;},
920
		clear : function(){
921
			clear(this.chart);
922
			return this;
923
		},
924
		stop : function(){
925
			// Stops any current animation loop occuring
926
			Chart.animationService.cancelAnimation(this);
927
			return this;
928
		},
929
		resize : function(callback){
930
			this.stop();
931
			var canvas = this.chart.canvas,
932
				newWidth = getMaximumWidth(this.chart.canvas),
933
				newHeight = this.options.maintainAspectRatio ? newWidth / this.chart.aspectRatio : getMaximumHeight(this.chart.canvas);
934
 
935
			canvas.width = this.chart.width = newWidth;
936
			canvas.height = this.chart.height = newHeight;
937
 
938
			retinaScale(this.chart);
939
 
940
			if (typeof callback === "function"){
941
				callback.apply(this, Array.prototype.slice.call(arguments, 1));
942
			}
943
			return this;
944
		},
945
		reflow : noop,
946
		render : function(reflow){
947
			if (reflow){
948
				this.reflow();
949
			}
950
 
951
			if (this.options.animation && !reflow){
952
				var animation = new Chart.Animation();
953
				animation.numSteps = this.options.animationSteps;
954
				animation.easing = this.options.animationEasing;
955
 
956
				// render function
957
				animation.render = function(chartInstance, animationObject) {
958
					var easingFunction = helpers.easingEffects[animationObject.easing];
959
					var stepDecimal = animationObject.currentStep / animationObject.numSteps;
960
					var easeDecimal = easingFunction(stepDecimal);
961
 
962
					chartInstance.draw(easeDecimal, stepDecimal, animationObject.currentStep);
963
				};
964
 
965
				// user events
966
				animation.onAnimationProgress = this.options.onAnimationProgress;
967
				animation.onAnimationComplete = this.options.onAnimationComplete;
968
 
969
				Chart.animationService.addAnimation(this, animation);
970
			}
971
			else{
972
				this.draw();
973
				this.options.onAnimationComplete.call(this);
974
			}
975
			return this;
976
		},
977
		generateLegend : function(){
978
			return helpers.template(this.options.legendTemplate, this);
979
		},
980
		destroy : function(){
981
			this.stop();
982
			this.clear();
983
			unbindEvents(this, this.events);
984
			var canvas = this.chart.canvas;
985
 
986
			// Reset canvas height/width attributes starts a fresh with the canvas context
987
			canvas.width = this.chart.width;
988
			canvas.height = this.chart.height;
989
 
990
			// < IE9 doesn't support removeProperty
991
			if (canvas.style.removeProperty) {
992
				canvas.style.removeProperty('width');
993
				canvas.style.removeProperty('height');
994
			} else {
995
				canvas.style.removeAttribute('width');
996
				canvas.style.removeAttribute('height');
997
			}
998
 
999
			delete Chart.instances[this.id];
1000
		},
1001
		showTooltip : function(ChartElements, forceRedraw){
1002
			// Only redraw the chart if we've actually changed what we're hovering on.
1003
			if (typeof this.activeElements === 'undefined') this.activeElements = [];
1004
 
1005
			var isChanged = (function(Elements){
1006
				var changed = false;
1007
 
1008
				if (Elements.length !== this.activeElements.length){
1009
					changed = true;
1010
					return changed;
1011
				}
1012
 
1013
				each(Elements, function(element, index){
1014
					if (element !== this.activeElements[index]){
1015
						changed = true;
1016
					}
1017
				}, this);
1018
				return changed;
1019
			}).call(this, ChartElements);
1020
 
1021
			if (!isChanged && !forceRedraw){
1022
				return;
1023
			}
1024
			else{
1025
				this.activeElements = ChartElements;
1026
			}
1027
			this.draw();
1028
			if(this.options.customTooltips){
1029
				this.options.customTooltips(false);
1030
			}
1031
			if (ChartElements.length > 0){
1032
				// If we have multiple datasets, show a MultiTooltip for all of the data points at that index
1033
				if (this.datasets && this.datasets.length > 1) {
1034
					var dataArray,
1035
						dataIndex;
1036
 
1037
					for (var i = this.datasets.length - 1; i >= 0; i--) {
1038
						dataArray = this.datasets[i].points || this.datasets[i].bars || this.datasets[i].segments;
1039
						dataIndex = indexOf(dataArray, ChartElements[0]);
1040
						if (dataIndex !== -1){
1041
							break;
1042
						}
1043
					}
1044
					var tooltipLabels = [],
1045
						tooltipColors = [],
1046
						medianPosition = (function(index) {
1047
 
1048
							// Get all the points at that particular index
1049
							var Elements = [],
1050
								dataCollection,
1051
								xPositions = [],
1052
								yPositions = [],
1053
								xMax,
1054
								yMax,
1055
								xMin,
1056
								yMin;
1057
							helpers.each(this.datasets, function(dataset){
1058
								dataCollection = dataset.points || dataset.bars || dataset.segments;
1059
								if (dataCollection[dataIndex] && dataCollection[dataIndex].hasValue()){
1060
									Elements.push(dataCollection[dataIndex]);
1061
								}
1062
							});
1063
 
1064
							helpers.each(Elements, function(element) {
1065
								xPositions.push(element.x);
1066
								yPositions.push(element.y);
1067
 
1068
 
1069
								//Include any colour information about the element
1070
								tooltipLabels.push(helpers.template(this.options.multiTooltipTemplate, element));
1071
								tooltipColors.push({
1072
									fill: element._saved.fillColor || element.fillColor,
1073
									stroke: element._saved.strokeColor || element.strokeColor
1074
								});
1075
 
1076
							}, this);
1077
 
1078
							yMin = min(yPositions);
1079
							yMax = max(yPositions);
1080
 
1081
							xMin = min(xPositions);
1082
							xMax = max(xPositions);
1083
 
1084
							return {
1085
								x: (xMin > this.chart.width/2) ? xMin : xMax,
1086
								y: (yMin + yMax)/2
1087
							};
1088
						}).call(this, dataIndex);
1089
 
1090
					new Chart.MultiTooltip({
1091
						x: medianPosition.x,
1092
						y: medianPosition.y,
1093
						xPadding: this.options.tooltipXPadding,
1094
						yPadding: this.options.tooltipYPadding,
1095
						xOffset: this.options.tooltipXOffset,
1096
						fillColor: this.options.tooltipFillColor,
1097
						textColor: this.options.tooltipFontColor,
1098
						fontFamily: this.options.tooltipFontFamily,
1099
						fontStyle: this.options.tooltipFontStyle,
1100
						fontSize: this.options.tooltipFontSize,
1101
						titleTextColor: this.options.tooltipTitleFontColor,
1102
						titleFontFamily: this.options.tooltipTitleFontFamily,
1103
						titleFontStyle: this.options.tooltipTitleFontStyle,
1104
						titleFontSize: this.options.tooltipTitleFontSize,
1105
						cornerRadius: this.options.tooltipCornerRadius,
1106
						labels: tooltipLabels,
1107
						legendColors: tooltipColors,
1108
						legendColorBackground : this.options.multiTooltipKeyBackground,
1109
						title: template(this.options.tooltipTitleTemplate,ChartElements[0]),
1110
						chart: this.chart,
1111
						ctx: this.chart.ctx,
1112
						custom: this.options.customTooltips
1113
					}).draw();
1114
 
1115
				} else {
1116
					each(ChartElements, function(Element) {
1117
						var tooltipPosition = Element.tooltipPosition();
1118
						new Chart.Tooltip({
1119
							x: Math.round(tooltipPosition.x),
1120
							y: Math.round(tooltipPosition.y),
1121
							xPadding: this.options.tooltipXPadding,
1122
							yPadding: this.options.tooltipYPadding,
1123
							fillColor: this.options.tooltipFillColor,
1124
							textColor: this.options.tooltipFontColor,
1125
							fontFamily: this.options.tooltipFontFamily,
1126
							fontStyle: this.options.tooltipFontStyle,
1127
							fontSize: this.options.tooltipFontSize,
1128
							caretHeight: this.options.tooltipCaretSize,
1129
							cornerRadius: this.options.tooltipCornerRadius,
1130
							text: template(this.options.tooltipTemplate, Element),
1131
							chart: this.chart,
1132
							custom: this.options.customTooltips
1133
						}).draw();
1134
					}, this);
1135
				}
1136
			}
1137
			return this;
1138
		},
1139
		toBase64Image : function(){
1140
			return this.chart.canvas.toDataURL.apply(this.chart.canvas, arguments);
1141
		}
1142
	});
1143
 
1144
	Chart.Type.extend = function(extensions){
1145
 
1146
		var parent = this;
1147
 
1148
		var ChartType = function(){
1149
			return parent.apply(this,arguments);
1150
		};
1151
 
1152
		//Copy the prototype object of the this class
1153
		ChartType.prototype = clone(parent.prototype);
1154
		//Now overwrite some of the properties in the base class with the new extensions
1155
		extend(ChartType.prototype, extensions);
1156
 
1157
		ChartType.extend = Chart.Type.extend;
1158
 
1159
		if (extensions.name || parent.prototype.name){
1160
 
1161
			var chartName = extensions.name || parent.prototype.name;
1162
			//Assign any potential default values of the new chart type
1163
 
1164
			//If none are defined, we'll use a clone of the chart type this is being extended from.
1165
			//I.e. if we extend a line chart, we'll use the defaults from the line chart if our new chart
1166
			//doesn't define some defaults of their own.
1167
 
1168
			var baseDefaults = (Chart.defaults[parent.prototype.name]) ? clone(Chart.defaults[parent.prototype.name]) : {};
1169
 
1170
			Chart.defaults[chartName] = extend(baseDefaults,extensions.defaults);
1171
 
1172
			Chart.types[chartName] = ChartType;
1173
 
1174
			//Register this new chart type in the Chart prototype
1175
			Chart.prototype[chartName] = function(data,options){
1176
				var config = merge(Chart.defaults.global, Chart.defaults[chartName], options || {});
1177
				return new ChartType(data,config,this);
1178
			};
1179
		} else{
1180
			warn("Name not provided for this chart, so it hasn't been registered");
1181
		}
1182
		return parent;
1183
	};
1184
 
1185
	Chart.Element = function(configuration){
1186
		extend(this,configuration);
1187
		this.initialize.apply(this,arguments);
1188
		this.save();
1189
	};
1190
	extend(Chart.Element.prototype,{
1191
		initialize : function(){},
1192
		restore : function(props){
1193
			if (!props){
1194
				extend(this,this._saved);
1195
			} else {
1196
				each(props,function(key){
1197
					this[key] = this._saved[key];
1198
				},this);
1199
			}
1200
			return this;
1201
		},
1202
		save : function(){
1203
			this._saved = clone(this);
1204
			delete this._saved._saved;
1205
			return this;
1206
		},
1207
		update : function(newProps){
1208
			each(newProps,function(value,key){
1209
				this._saved[key] = this[key];
1210
				this[key] = value;
1211
			},this);
1212
			return this;
1213
		},
1214
		transition : function(props,ease){
1215
			each(props,function(value,key){
1216
				this[key] = ((value - this._saved[key]) * ease) + this._saved[key];
1217
			},this);
1218
			return this;
1219
		},
1220
		tooltipPosition : function(){
1221
			return {
1222
				x : this.x,
1223
				y : this.y
1224
			};
1225
		},
1226
		hasValue: function(){
1227
			return isNumber(this.value);
1228
		}
1229
	});
1230
 
1231
	Chart.Element.extend = inherits;
1232
 
1233
 
1234
	Chart.Point = Chart.Element.extend({
1235
		display: true,
1236
		inRange: function(chartX,chartY){
1237
			var hitDetectionRange = this.hitDetectionRadius + this.radius;
1238
			return ((Math.pow(chartX-this.x, 2)+Math.pow(chartY-this.y, 2)) < Math.pow(hitDetectionRange,2));
1239
		},
1240
		draw : function(){
1241
			if (this.display){
1242
				var ctx = this.ctx;
1243
				ctx.beginPath();
1244
 
1245
				ctx.arc(this.x, this.y, this.radius, 0, Math.PI*2);
1246
				ctx.closePath();
1247
 
1248
				ctx.strokeStyle = this.strokeColor;
1249
				ctx.lineWidth = this.strokeWidth;
1250
 
1251
				ctx.fillStyle = this.fillColor;
1252
 
1253
				ctx.fill();
1254
				ctx.stroke();
1255
			}
1256
 
1257
 
1258
			//Quick debug for bezier curve splining
1259
			//Highlights control points and the line between them.
1260
			//Handy for dev - stripped in the min version.
1261
 
1262
			// ctx.save();
1263
			// ctx.fillStyle = "black";
1264
			// ctx.strokeStyle = "black"
1265
			// ctx.beginPath();
1266
			// ctx.arc(this.controlPoints.inner.x,this.controlPoints.inner.y, 2, 0, Math.PI*2);
1267
			// ctx.fill();
1268
 
1269
			// ctx.beginPath();
1270
			// ctx.arc(this.controlPoints.outer.x,this.controlPoints.outer.y, 2, 0, Math.PI*2);
1271
			// ctx.fill();
1272
 
1273
			// ctx.moveTo(this.controlPoints.inner.x,this.controlPoints.inner.y);
1274
			// ctx.lineTo(this.x, this.y);
1275
			// ctx.lineTo(this.controlPoints.outer.x,this.controlPoints.outer.y);
1276
			// ctx.stroke();
1277
 
1278
			// ctx.restore();
1279
 
1280
 
1281
 
1282
		}
1283
	});
1284
 
1285
	Chart.Arc = Chart.Element.extend({
1286
		inRange : function(chartX,chartY){
1287
 
1288
			var pointRelativePosition = helpers.getAngleFromPoint(this, {
1289
				x: chartX,
1290
				y: chartY
1291
			});
1292
 
1293
			// Normalize all angles to 0 - 2*PI (0 - 360°)
1294
			var pointRelativeAngle = pointRelativePosition.angle % (Math.PI * 2),
1295
			    startAngle = (Math.PI * 2 + this.startAngle) % (Math.PI * 2),
1296
			    endAngle = (Math.PI * 2 + this.endAngle) % (Math.PI * 2) || 360;
1297
 
1298
			// Calculate wether the pointRelativeAngle is between the start and the end angle
1299
			var betweenAngles = (endAngle < startAngle) ?
1300
				pointRelativeAngle <= endAngle || pointRelativeAngle >= startAngle:
1301
				pointRelativeAngle >= startAngle && pointRelativeAngle <= endAngle;
1302
 
1303
			//Check if within the range of the open/close angle
1304
			var withinRadius = (pointRelativePosition.distance >= this.innerRadius && pointRelativePosition.distance <= this.outerRadius);
1305
 
1306
			return (betweenAngles && withinRadius);
1307
			//Ensure within the outside of the arc centre, but inside arc outer
1308
		},
1309
		tooltipPosition : function(){
1310
			var centreAngle = this.startAngle + ((this.endAngle - this.startAngle) / 2),
1311
				rangeFromCentre = (this.outerRadius - this.innerRadius) / 2 + this.innerRadius;
1312
			return {
1313
				x : this.x + (Math.cos(centreAngle) * rangeFromCentre),
1314
				y : this.y + (Math.sin(centreAngle) * rangeFromCentre)
1315
			};
1316
		},
1317
		draw : function(animationPercent){
1318
 
1319
			var easingDecimal = animationPercent || 1;
1320
 
1321
			var ctx = this.ctx;
1322
 
1323
			ctx.beginPath();
1324
 
1325
			ctx.arc(this.x, this.y, this.outerRadius < 0 ? 0 : this.outerRadius, this.startAngle, this.endAngle);
1326
 
1327
            ctx.arc(this.x, this.y, this.innerRadius < 0 ? 0 : this.innerRadius, this.endAngle, this.startAngle, true);
1328
 
1329
			ctx.closePath();
1330
			ctx.strokeStyle = this.strokeColor;
1331
			ctx.lineWidth = this.strokeWidth;
1332
 
1333
			ctx.fillStyle = this.fillColor;
1334
 
1335
			ctx.fill();
1336
			ctx.lineJoin = 'bevel';
1337
 
1338
			if (this.showStroke){
1339
				ctx.stroke();
1340
			}
1341
		}
1342
	});
1343
 
1344
	Chart.Rectangle = Chart.Element.extend({
1345
		draw : function(){
1346
			var ctx = this.ctx,
1347
				halfWidth = this.width/2,
1348
				leftX = this.x - halfWidth,
1349
				rightX = this.x + halfWidth,
1350
				top = this.base - (this.base - this.y),
1351
				halfStroke = this.strokeWidth / 2;
1352
 
1353
			// Canvas doesn't allow us to stroke inside the width so we can
1354
			// adjust the sizes to fit if we're setting a stroke on the line
1355
			if (this.showStroke){
1356
				leftX += halfStroke;
1357
				rightX -= halfStroke;
1358
				top += halfStroke;
1359
			}
1360
 
1361
			ctx.beginPath();
1362
 
1363
			ctx.fillStyle = this.fillColor;
1364
			ctx.strokeStyle = this.strokeColor;
1365
			ctx.lineWidth = this.strokeWidth;
1366
 
1367
			// It'd be nice to keep this class totally generic to any rectangle
1368
			// and simply specify which border to miss out.
1369
			ctx.moveTo(leftX, this.base);
1370
			ctx.lineTo(leftX, top);
1371
			ctx.lineTo(rightX, top);
1372
			ctx.lineTo(rightX, this.base);
1373
			ctx.fill();
1374
			if (this.showStroke){
1375
				ctx.stroke();
1376
			}
1377
		},
1378
		height : function(){
1379
			return this.base - this.y;
1380
		},
1381
		inRange : function(chartX,chartY){
1382
			return (chartX >= this.x - this.width/2 && chartX <= this.x + this.width/2) && (chartY >= this.y && chartY <= this.base);
1383
		}
1384
	});
1385
 
1386
	Chart.Animation = Chart.Element.extend({
1387
		currentStep: null, // the current animation step
1388
		numSteps: 60, // default number of steps
1389
		easing: "", // the easing to use for this animation
1390
		render: null, // render function used by the animation service
1391
 
1392
		onAnimationProgress: null, // user specified callback to fire on each step of the animation
1393
		onAnimationComplete: null, // user specified callback to fire when the animation finishes
1394
	});
1395
 
1396
	Chart.Tooltip = Chart.Element.extend({
1397
		draw : function(){
1398
 
1399
			var ctx = this.chart.ctx;
1400
 
1401
			ctx.font = fontString(this.fontSize,this.fontStyle,this.fontFamily);
1402
 
1403
			this.xAlign = "center";
1404
			this.yAlign = "above";
1405
 
1406
			//Distance between the actual element.y position and the start of the tooltip caret
1407
			var caretPadding = this.caretPadding = 2;
1408
 
1409
			var tooltipWidth = ctx.measureText(this.text).width + 2*this.xPadding,
1410
				tooltipRectHeight = this.fontSize + 2*this.yPadding,
1411
				tooltipHeight = tooltipRectHeight + this.caretHeight + caretPadding;
1412
 
1413
			if (this.x + tooltipWidth/2 >this.chart.width){
1414
				this.xAlign = "left";
1415
			} else if (this.x - tooltipWidth/2 < 0){
1416
				this.xAlign = "right";
1417
			}
1418
 
1419
			if (this.y - tooltipHeight < 0){
1420
				this.yAlign = "below";
1421
			}
1422
 
1423
 
1424
			var tooltipX = this.x - tooltipWidth/2,
1425
				tooltipY = this.y - tooltipHeight;
1426
 
1427
			ctx.fillStyle = this.fillColor;
1428
 
1429
			// Custom Tooltips
1430
			if(this.custom){
1431
				this.custom(this);
1432
			}
1433
			else{
1434
				switch(this.yAlign)
1435
				{
1436
				case "above":
1437
					//Draw a caret above the x/y
1438
					ctx.beginPath();
1439
					ctx.moveTo(this.x,this.y - caretPadding);
1440
					ctx.lineTo(this.x + this.caretHeight, this.y - (caretPadding + this.caretHeight));
1441
					ctx.lineTo(this.x - this.caretHeight, this.y - (caretPadding + this.caretHeight));
1442
					ctx.closePath();
1443
					ctx.fill();
1444
					break;
1445
				case "below":
1446
					tooltipY = this.y + caretPadding + this.caretHeight;
1447
					//Draw a caret below the x/y
1448
					ctx.beginPath();
1449
					ctx.moveTo(this.x, this.y + caretPadding);
1450
					ctx.lineTo(this.x + this.caretHeight, this.y + caretPadding + this.caretHeight);
1451
					ctx.lineTo(this.x - this.caretHeight, this.y + caretPadding + this.caretHeight);
1452
					ctx.closePath();
1453
					ctx.fill();
1454
					break;
1455
				}
1456
 
1457
				switch(this.xAlign)
1458
				{
1459
				case "left":
1460
					tooltipX = this.x - tooltipWidth + (this.cornerRadius + this.caretHeight);
1461
					break;
1462
				case "right":
1463
					tooltipX = this.x - (this.cornerRadius + this.caretHeight);
1464
					break;
1465
				}
1466
 
1467
				drawRoundedRectangle(ctx,tooltipX,tooltipY,tooltipWidth,tooltipRectHeight,this.cornerRadius);
1468
 
1469
				ctx.fill();
1470
 
1471
				ctx.fillStyle = this.textColor;
1472
				ctx.textAlign = "center";
1473
				ctx.textBaseline = "middle";
1474
				ctx.fillText(this.text, tooltipX + tooltipWidth/2, tooltipY + tooltipRectHeight/2);
1475
			}
1476
		}
1477
	});
1478
 
1479
	Chart.MultiTooltip = Chart.Element.extend({
1480
		initialize : function(){
1481
			this.font = fontString(this.fontSize,this.fontStyle,this.fontFamily);
1482
 
1483
			this.titleFont = fontString(this.titleFontSize,this.titleFontStyle,this.titleFontFamily);
1484
 
1485
			this.titleHeight = this.title ? this.titleFontSize * 1.5 : 0;
1486
			this.height = (this.labels.length * this.fontSize) + ((this.labels.length-1) * (this.fontSize/2)) + (this.yPadding*2) + this.titleHeight;
1487
 
1488
			this.ctx.font = this.titleFont;
1489
 
1490
			var titleWidth = this.ctx.measureText(this.title).width,
1491
				//Label has a legend square as well so account for this.
1492
				labelWidth = longestText(this.ctx,this.font,this.labels) + this.fontSize + 3,
1493
				longestTextWidth = max([labelWidth,titleWidth]);
1494
 
1495
			this.width = longestTextWidth + (this.xPadding*2);
1496
 
1497
 
1498
			var halfHeight = this.height/2;
1499
 
1500
			//Check to ensure the height will fit on the canvas
1501
			if (this.y - halfHeight < 0 ){
1502
				this.y = halfHeight;
1503
			} else if (this.y + halfHeight > this.chart.height){
1504
				this.y = this.chart.height - halfHeight;
1505
			}
1506
 
1507
			//Decide whether to align left or right based on position on canvas
1508
			if (this.x > this.chart.width/2){
1509
				this.x -= this.xOffset + this.width;
1510
			} else {
1511
				this.x += this.xOffset;
1512
			}
1513
 
1514
 
1515
		},
1516
		getLineHeight : function(index){
1517
			var baseLineHeight = this.y - (this.height/2) + this.yPadding,
1518
				afterTitleIndex = index-1;
1519
 
1520
			//If the index is zero, we're getting the title
1521
			if (index === 0){
1522
				return baseLineHeight + this.titleHeight / 3;
1523
			} else{
1524
				return baseLineHeight + ((this.fontSize * 1.5 * afterTitleIndex) + this.fontSize / 2) + this.titleHeight;
1525
			}
1526
 
1527
		},
1528
		draw : function(){
1529
			// Custom Tooltips
1530
			if(this.custom){
1531
				this.custom(this);
1532
			}
1533
			else{
1534
				drawRoundedRectangle(this.ctx,this.x,this.y - this.height/2,this.width,this.height,this.cornerRadius);
1535
				var ctx = this.ctx;
1536
				ctx.fillStyle = this.fillColor;
1537
				ctx.fill();
1538
				ctx.closePath();
1539
 
1540
				ctx.textAlign = "left";
1541
				ctx.textBaseline = "middle";
1542
				ctx.fillStyle = this.titleTextColor;
1543
				ctx.font = this.titleFont;
1544
 
1545
				ctx.fillText(this.title,this.x + this.xPadding, this.getLineHeight(0));
1546
 
1547
				ctx.font = this.font;
1548
				helpers.each(this.labels,function(label,index){
1549
					ctx.fillStyle = this.textColor;
1550
					ctx.fillText(label,this.x + this.xPadding + this.fontSize + 3, this.getLineHeight(index + 1));
1551
 
1552
					//A bit gnarly, but clearing this rectangle breaks when using explorercanvas (clears whole canvas)
1553
					//ctx.clearRect(this.x + this.xPadding, this.getLineHeight(index + 1) - this.fontSize/2, this.fontSize, this.fontSize);
1554
					//Instead we'll make a white filled block to put the legendColour palette over.
1555
 
1556
					ctx.fillStyle = this.legendColorBackground;
1557
					ctx.fillRect(this.x + this.xPadding, this.getLineHeight(index + 1) - this.fontSize/2, this.fontSize, this.fontSize);
1558
 
1559
					ctx.fillStyle = this.legendColors[index].fill;
1560
					ctx.fillRect(this.x + this.xPadding, this.getLineHeight(index + 1) - this.fontSize/2, this.fontSize, this.fontSize);
1561
 
1562
 
1563
				},this);
1564
			}
1565
		}
1566
	});
1567
 
1568
	Chart.Scale = Chart.Element.extend({
1569
		initialize : function(){
1570
			this.fit();
1571
		},
1572
		buildYLabels : function(){
1573
			this.yLabels = [];
1574
 
1575
			var stepDecimalPlaces = getDecimalPlaces(this.stepValue);
1576
 
1577
			for (var i=0; i<=this.steps; i++){
1578
				this.yLabels.push(template(this.templateString,{value:(this.min + (i * this.stepValue)).toFixed(stepDecimalPlaces)}));
1579
			}
1580
			this.yLabelWidth = (this.display && this.showLabels) ? longestText(this.ctx,this.font,this.yLabels) + 10 : 0;
1581
		},
1582
		addXLabel : function(label){
1583
			this.xLabels.push(label);
1584
			this.valuesCount++;
1585
			this.fit();
1586
		},
1587
		removeXLabel : function(){
1588
			this.xLabels.shift();
1589
			this.valuesCount--;
1590
			this.fit();
1591
		},
1592
		// Fitting loop to rotate x Labels and figure out what fits there, and also calculate how many Y steps to use
1593
		fit: function(){
1594
			// First we need the width of the yLabels, assuming the xLabels aren't rotated
1595
 
1596
			// To do that we need the base line at the top and base of the chart, assuming there is no x label rotation
1597
			this.startPoint = (this.display) ? this.fontSize : 0;
1598
			this.endPoint = (this.display) ? this.height - (this.fontSize * 1.5) - 5 : this.height; // -5 to pad labels
1599
 
1600
			// Apply padding settings to the start and end point.
1601
			this.startPoint += this.padding;
1602
			this.endPoint -= this.padding;
1603
 
1604
			// Cache the starting endpoint, excluding the space for x labels
1605
			var cachedEndPoint = this.endPoint;
1606
 
1607
			// Cache the starting height, so can determine if we need to recalculate the scale yAxis
1608
			var cachedHeight = this.endPoint - this.startPoint,
1609
				cachedYLabelWidth;
1610
 
1611
			// Build the current yLabels so we have an idea of what size they'll be to start
1612
			/*
1613
			 *	This sets what is returned from calculateScaleRange as static properties of this class:
1614
			 *
1615
				this.steps;
1616
				this.stepValue;
1617
				this.min;
1618
				this.max;
1619
			 *
1620
			 */
1621
			this.calculateYRange(cachedHeight);
1622
 
1623
			// With these properties set we can now build the array of yLabels
1624
			// and also the width of the largest yLabel
1625
			this.buildYLabels();
1626
 
1627
			this.calculateXLabelRotation();
1628
 
1629
			while((cachedHeight > this.endPoint - this.startPoint)){
1630
				cachedHeight = this.endPoint - this.startPoint;
1631
				cachedYLabelWidth = this.yLabelWidth;
1632
 
1633
				this.calculateYRange(cachedHeight);
1634
				this.buildYLabels();
1635
 
1636
				// Only go through the xLabel loop again if the yLabel width has changed
1637
				if (cachedYLabelWidth < this.yLabelWidth){
1638
					this.endPoint = cachedEndPoint;
1639
					this.calculateXLabelRotation();
1640
				}
1641
			}
1642
 
1643
		},
1644
		calculateXLabelRotation : function(){
1645
			//Get the width of each grid by calculating the difference
1646
			//between x offsets between 0 and 1.
1647
 
1648
			this.ctx.font = this.font;
1649
 
1650
			var firstWidth = this.ctx.measureText(this.xLabels[0]).width,
1651
				lastWidth = this.ctx.measureText(this.xLabels[this.xLabels.length - 1]).width,
1652
				firstRotated,
1653
				lastRotated;
1654
 
1655
 
1656
			this.xScalePaddingRight = lastWidth/2 + 3;
1657
			this.xScalePaddingLeft = (firstWidth/2 > this.yLabelWidth) ? firstWidth/2 : this.yLabelWidth;
1658
 
1659
			this.xLabelRotation = 0;
1660
			if (this.display){
1661
				var originalLabelWidth = longestText(this.ctx,this.font,this.xLabels),
1662
					cosRotation,
1663
					firstRotatedWidth;
1664
				this.xLabelWidth = originalLabelWidth;
1665
				//Allow 3 pixels x2 padding either side for label readability
1666
				var xGridWidth = Math.floor(this.calculateX(1) - this.calculateX(0)) - 6;
1667
 
1668
				//Max label rotate should be 90 - also act as a loop counter
1669
				while ((this.xLabelWidth > xGridWidth && this.xLabelRotation === 0) || (this.xLabelWidth > xGridWidth && this.xLabelRotation <= 90 && this.xLabelRotation > 0)){
1670
					cosRotation = Math.cos(toRadians(this.xLabelRotation));
1671
 
1672
					firstRotated = cosRotation * firstWidth;
1673
					lastRotated = cosRotation * lastWidth;
1674
 
1675
					// We're right aligning the text now.
1676
					if (firstRotated + this.fontSize / 2 > this.yLabelWidth){
1677
						this.xScalePaddingLeft = firstRotated + this.fontSize / 2;
1678
					}
1679
					this.xScalePaddingRight = this.fontSize/2;
1680
 
1681
 
1682
					this.xLabelRotation++;
1683
					this.xLabelWidth = cosRotation * originalLabelWidth;
1684
 
1685
				}
1686
				if (this.xLabelRotation > 0){
1687
					this.endPoint -= Math.sin(toRadians(this.xLabelRotation))*originalLabelWidth + 3;
1688
				}
1689
			}
1690
			else{
1691
				this.xLabelWidth = 0;
1692
				this.xScalePaddingRight = this.padding;
1693
				this.xScalePaddingLeft = this.padding;
1694
			}
1695
 
1696
		},
1697
		// Needs to be overidden in each Chart type
1698
		// Otherwise we need to pass all the data into the scale class
1699
		calculateYRange: noop,
1700
		drawingArea: function(){
1701
			return this.startPoint - this.endPoint;
1702
		},
1703
		calculateY : function(value){
1704
			var scalingFactor = this.drawingArea() / (this.min - this.max);
1705
			return this.endPoint - (scalingFactor * (value - this.min));
1706
		},
1707
		calculateX : function(index){
1708
			var isRotated = (this.xLabelRotation > 0),
1709
				// innerWidth = (this.offsetGridLines) ? this.width - offsetLeft - this.padding : this.width - (offsetLeft + halfLabelWidth * 2) - this.padding,
1710
				innerWidth = this.width - (this.xScalePaddingLeft + this.xScalePaddingRight),
1711
				valueWidth = innerWidth/Math.max((this.valuesCount - ((this.offsetGridLines) ? 0 : 1)), 1),
1712
				valueOffset = (valueWidth * index) + this.xScalePaddingLeft;
1713
 
1714
			if (this.offsetGridLines){
1715
				valueOffset += (valueWidth/2);
1716
			}
1717
 
1718
			return Math.round(valueOffset);
1719
		},
1720
		update : function(newProps){
1721
			helpers.extend(this, newProps);
1722
			this.fit();
1723
		},
1724
		draw : function(){
1725
			var ctx = this.ctx,
1726
				yLabelGap = (this.endPoint - this.startPoint) / this.steps,
1727
				xStart = Math.round(this.xScalePaddingLeft);
1728
			if (this.display){
1729
				ctx.fillStyle = this.textColor;
1730
				ctx.font = this.font;
1731
				each(this.yLabels,function(labelString,index){
1732
					var yLabelCenter = this.endPoint - (yLabelGap * index),
1733
						linePositionY = Math.round(yLabelCenter),
1734
						drawHorizontalLine = this.showHorizontalLines;
1735
 
1736
					ctx.textAlign = "right";
1737
					ctx.textBaseline = "middle";
1738
					if (this.showLabels){
1739
						ctx.fillText(labelString,xStart - 10,yLabelCenter);
1740
					}
1741
 
1742
					// This is X axis, so draw it
1743
					if (index === 0 && !drawHorizontalLine){
1744
						drawHorizontalLine = true;
1745
					}
1746
 
1747
					if (drawHorizontalLine){
1748
						ctx.beginPath();
1749
					}
1750
 
1751
					if (index > 0){
1752
						// This is a grid line in the centre, so drop that
1753
						ctx.lineWidth = this.gridLineWidth;
1754
						ctx.strokeStyle = this.gridLineColor;
1755
					} else {
1756
						// This is the first line on the scale
1757
						ctx.lineWidth = this.lineWidth;
1758
						ctx.strokeStyle = this.lineColor;
1759
					}
1760
 
1761
					linePositionY += helpers.aliasPixel(ctx.lineWidth);
1762
 
1763
					if(drawHorizontalLine){
1764
						ctx.moveTo(xStart, linePositionY);
1765
						ctx.lineTo(this.width, linePositionY);
1766
						ctx.stroke();
1767
						ctx.closePath();
1768
					}
1769
 
1770
					ctx.lineWidth = this.lineWidth;
1771
					ctx.strokeStyle = this.lineColor;
1772
					ctx.beginPath();
1773
					ctx.moveTo(xStart - 5, linePositionY);
1774
					ctx.lineTo(xStart, linePositionY);
1775
					ctx.stroke();
1776
					ctx.closePath();
1777
 
1778
				},this);
1779
 
1780
				each(this.xLabels,function(label,index){
1781
					var xPos = this.calculateX(index) + aliasPixel(this.lineWidth),
1782
						// Check to see if line/bar here and decide where to place the line
1783
						linePos = this.calculateX(index - (this.offsetGridLines ? 0.5 : 0)) + aliasPixel(this.lineWidth),
1784
						isRotated = (this.xLabelRotation > 0),
1785
						drawVerticalLine = this.showVerticalLines;
1786
 
1787
					// This is Y axis, so draw it
1788
					if (index === 0 && !drawVerticalLine){
1789
						drawVerticalLine = true;
1790
					}
1791
 
1792
					if (drawVerticalLine){
1793
						ctx.beginPath();
1794
					}
1795
 
1796
					if (index > 0){
1797
						// This is a grid line in the centre, so drop that
1798
						ctx.lineWidth = this.gridLineWidth;
1799
						ctx.strokeStyle = this.gridLineColor;
1800
					} else {
1801
						// This is the first line on the scale
1802
						ctx.lineWidth = this.lineWidth;
1803
						ctx.strokeStyle = this.lineColor;
1804
					}
1805
 
1806
					if (drawVerticalLine){
1807
						ctx.moveTo(linePos,this.endPoint);
1808
						ctx.lineTo(linePos,this.startPoint - 3);
1809
						ctx.stroke();
1810
						ctx.closePath();
1811
					}
1812
 
1813
 
1814
					ctx.lineWidth = this.lineWidth;
1815
					ctx.strokeStyle = this.lineColor;
1816
 
1817
 
1818
					// Small lines at the bottom of the base grid line
1819
					ctx.beginPath();
1820
					ctx.moveTo(linePos,this.endPoint);
1821
					ctx.lineTo(linePos,this.endPoint + 5);
1822
					ctx.stroke();
1823
					ctx.closePath();
1824
 
1825
					ctx.save();
1826
					ctx.translate(xPos,(isRotated) ? this.endPoint + 12 : this.endPoint + 8);
1827
					ctx.rotate(toRadians(this.xLabelRotation)*-1);
1828
					ctx.font = this.font;
1829
					ctx.textAlign = (isRotated) ? "right" : "center";
1830
					ctx.textBaseline = (isRotated) ? "middle" : "top";
1831
					ctx.fillText(label, 0, 0);
1832
					ctx.restore();
1833
				},this);
1834
 
1835
			}
1836
		}
1837
 
1838
	});
1839
 
1840
	Chart.RadialScale = Chart.Element.extend({
1841
		initialize: function(){
1842
			this.size = min([this.height, this.width]);
1843
			this.drawingArea = (this.display) ? (this.size/2) - (this.fontSize/2 + this.backdropPaddingY) : (this.size/2);
1844
		},
1845
		calculateCenterOffset: function(value){
1846
			// Take into account half font size + the yPadding of the top value
1847
			var scalingFactor = this.drawingArea / (this.max - this.min);
1848
 
1849
			return (value - this.min) * scalingFactor;
1850
		},
1851
		update : function(){
1852
			if (!this.lineArc){
1853
				this.setScaleSize();
1854
			} else {
1855
				this.drawingArea = (this.display) ? (this.size/2) - (this.fontSize/2 + this.backdropPaddingY) : (this.size/2);
1856
			}
1857
			this.buildYLabels();
1858
		},
1859
		buildYLabels: function(){
1860
			this.yLabels = [];
1861
 
1862
			var stepDecimalPlaces = getDecimalPlaces(this.stepValue);
1863
 
1864
			for (var i=0; i<=this.steps; i++){
1865
				this.yLabels.push(template(this.templateString,{value:(this.min + (i * this.stepValue)).toFixed(stepDecimalPlaces)}));
1866
			}
1867
		},
1868
		getCircumference : function(){
1869
			return ((Math.PI*2) / this.valuesCount);
1870
		},
1871
		setScaleSize: function(){
1872
			/*
1873
			 * Right, this is really confusing and there is a lot of maths going on here
1874
			 * The gist of the problem is here: https://gist.github.com/nnnick/696cc9c55f4b0beb8fe9
1875
			 *
1876
			 * Reaction: https://dl.dropboxusercontent.com/u/34601363/toomuchscience.gif
1877
			 *
1878
			 * Solution:
1879
			 *
1880
			 * We assume the radius of the polygon is half the size of the canvas at first
1881
			 * at each index we check if the text overlaps.
1882
			 *
1883
			 * Where it does, we store that angle and that index.
1884
			 *
1885
			 * After finding the largest index and angle we calculate how much we need to remove
1886
			 * from the shape radius to move the point inwards by that x.
1887
			 *
1888
			 * We average the left and right distances to get the maximum shape radius that can fit in the box
1889
			 * along with labels.
1890
			 *
1891
			 * Once we have that, we can find the centre point for the chart, by taking the x text protrusion
1892
			 * on each side, removing that from the size, halving it and adding the left x protrusion width.
1893
			 *
1894
			 * This will mean we have a shape fitted to the canvas, as large as it can be with the labels
1895
			 * and position it in the most space efficient manner
1896
			 *
1897
			 * https://dl.dropboxusercontent.com/u/34601363/yeahscience.gif
1898
			 */
1899
 
1900
 
1901
			// Get maximum radius of the polygon. Either half the height (minus the text width) or half the width.
1902
			// Use this to calculate the offset + change. - Make sure L/R protrusion is at least 0 to stop issues with centre points
1903
			var largestPossibleRadius = min([(this.height/2 - this.pointLabelFontSize - 5), this.width/2]),
1904
				pointPosition,
1905
				i,
1906
				textWidth,
1907
				halfTextWidth,
1908
				furthestRight = this.width,
1909
				furthestRightIndex,
1910
				furthestRightAngle,
1911
				furthestLeft = 0,
1912
				furthestLeftIndex,
1913
				furthestLeftAngle,
1914
				xProtrusionLeft,
1915
				xProtrusionRight,
1916
				radiusReductionRight,
1917
				radiusReductionLeft,
1918
				maxWidthRadius;
1919
			this.ctx.font = fontString(this.pointLabelFontSize,this.pointLabelFontStyle,this.pointLabelFontFamily);
1920
			for (i=0;i<this.valuesCount;i++){
1921
				// 5px to space the text slightly out - similar to what we do in the draw function.
1922
				pointPosition = this.getPointPosition(i, largestPossibleRadius);
1923
				textWidth = this.ctx.measureText(template(this.templateString, { value: this.labels[i] })).width + 5;
1924
				if (i === 0 || i === this.valuesCount/2){
1925
					// If we're at index zero, or exactly the middle, we're at exactly the top/bottom
1926
					// of the radar chart, so text will be aligned centrally, so we'll half it and compare
1927
					// w/left and right text sizes
1928
					halfTextWidth = textWidth/2;
1929
					if (pointPosition.x + halfTextWidth > furthestRight) {
1930
						furthestRight = pointPosition.x + halfTextWidth;
1931
						furthestRightIndex = i;
1932
					}
1933
					if (pointPosition.x - halfTextWidth < furthestLeft) {
1934
						furthestLeft = pointPosition.x - halfTextWidth;
1935
						furthestLeftIndex = i;
1936
					}
1937
				}
1938
				else if (i < this.valuesCount/2) {
1939
					// Less than half the values means we'll left align the text
1940
					if (pointPosition.x + textWidth > furthestRight) {
1941
						furthestRight = pointPosition.x + textWidth;
1942
						furthestRightIndex = i;
1943
					}
1944
				}
1945
				else if (i > this.valuesCount/2){
1946
					// More than half the values means we'll right align the text
1947
					if (pointPosition.x - textWidth < furthestLeft) {
1948
						furthestLeft = pointPosition.x - textWidth;
1949
						furthestLeftIndex = i;
1950
					}
1951
				}
1952
			}
1953
 
1954
			xProtrusionLeft = furthestLeft;
1955
 
1956
			xProtrusionRight = Math.ceil(furthestRight - this.width);
1957
 
1958
			furthestRightAngle = this.getIndexAngle(furthestRightIndex);
1959
 
1960
			furthestLeftAngle = this.getIndexAngle(furthestLeftIndex);
1961
 
1962
			radiusReductionRight = xProtrusionRight / Math.sin(furthestRightAngle + Math.PI/2);
1963
 
1964
			radiusReductionLeft = xProtrusionLeft / Math.sin(furthestLeftAngle + Math.PI/2);
1965
 
1966
			// Ensure we actually need to reduce the size of the chart
1967
			radiusReductionRight = (isNumber(radiusReductionRight)) ? radiusReductionRight : 0;
1968
			radiusReductionLeft = (isNumber(radiusReductionLeft)) ? radiusReductionLeft : 0;
1969
 
1970
			this.drawingArea = largestPossibleRadius - (radiusReductionLeft + radiusReductionRight)/2;
1971
 
1972
			//this.drawingArea = min([maxWidthRadius, (this.height - (2 * (this.pointLabelFontSize + 5)))/2])
1973
			this.setCenterPoint(radiusReductionLeft, radiusReductionRight);
1974
 
1975
		},
1976
		setCenterPoint: function(leftMovement, rightMovement){
1977
 
1978
			var maxRight = this.width - rightMovement - this.drawingArea,
1979
				maxLeft = leftMovement + this.drawingArea;
1980
 
1981
			this.xCenter = (maxLeft + maxRight)/2;
1982
			// Always vertically in the centre as the text height doesn't change
1983
			this.yCenter = (this.height/2);
1984
		},
1985
 
1986
		getIndexAngle : function(index){
1987
			var angleMultiplier = (Math.PI * 2) / this.valuesCount;
1988
			// Start from the top instead of right, so remove a quarter of the circle
1989
 
1990
			return index * angleMultiplier - (Math.PI/2);
1991
		},
1992
		getPointPosition : function(index, distanceFromCenter){
1993
			var thisAngle = this.getIndexAngle(index);
1994
			return {
1995
				x : (Math.cos(thisAngle) * distanceFromCenter) + this.xCenter,
1996
				y : (Math.sin(thisAngle) * distanceFromCenter) + this.yCenter
1997
			};
1998
		},
1999
		draw: function(){
2000
			if (this.display){
2001
				var ctx = this.ctx;
2002
				each(this.yLabels, function(label, index){
2003
					// Don't draw a centre value
2004
					if (index > 0){
2005
						var yCenterOffset = index * (this.drawingArea/this.steps),
2006
							yHeight = this.yCenter - yCenterOffset,
2007
							pointPosition;
2008
 
2009
						// Draw circular lines around the scale
2010
						if (this.lineWidth > 0){
2011
							ctx.strokeStyle = this.lineColor;
2012
							ctx.lineWidth = this.lineWidth;
2013
 
2014
							if(this.lineArc){
2015
								ctx.beginPath();
2016
								ctx.arc(this.xCenter, this.yCenter, yCenterOffset, 0, Math.PI*2);
2017
								ctx.closePath();
2018
								ctx.stroke();
2019
							} else{
2020
								ctx.beginPath();
2021
								for (var i=0;i<this.valuesCount;i++)
2022
								{
2023
									pointPosition = this.getPointPosition(i, this.calculateCenterOffset(this.min + (index * this.stepValue)));
2024
									if (i === 0){
2025
										ctx.moveTo(pointPosition.x, pointPosition.y);
2026
									} else {
2027
										ctx.lineTo(pointPosition.x, pointPosition.y);
2028
									}
2029
								}
2030
								ctx.closePath();
2031
								ctx.stroke();
2032
							}
2033
						}
2034
						if(this.showLabels){
2035
							ctx.font = fontString(this.fontSize,this.fontStyle,this.fontFamily);
2036
							if (this.showLabelBackdrop){
2037
								var labelWidth = ctx.measureText(label).width;
2038
								ctx.fillStyle = this.backdropColor;
2039
								ctx.fillRect(
2040
									this.xCenter - labelWidth/2 - this.backdropPaddingX,
2041
									yHeight - this.fontSize/2 - this.backdropPaddingY,
2042
									labelWidth + this.backdropPaddingX*2,
2043
									this.fontSize + this.backdropPaddingY*2
2044
								);
2045
							}
2046
							ctx.textAlign = 'center';
2047
							ctx.textBaseline = "middle";
2048
							ctx.fillStyle = this.fontColor;
2049
							ctx.fillText(label, this.xCenter, yHeight);
2050
						}
2051
					}
2052
				}, this);
2053
 
2054
				if (!this.lineArc){
2055
					ctx.lineWidth = this.angleLineWidth;
2056
					ctx.strokeStyle = this.angleLineColor;
2057
					for (var i = this.valuesCount - 1; i >= 0; i--) {
2058
						var centerOffset = null, outerPosition = null;
2059
 
2060
						if (this.angleLineWidth > 0 && (i % this.angleLineInterval === 0)){
2061
							centerOffset = this.calculateCenterOffset(this.max);
2062
							outerPosition = this.getPointPosition(i, centerOffset);
2063
							ctx.beginPath();
2064
							ctx.moveTo(this.xCenter, this.yCenter);
2065
							ctx.lineTo(outerPosition.x, outerPosition.y);
2066
							ctx.stroke();
2067
							ctx.closePath();
2068
						}
2069
 
2070
						if (this.backgroundColors && this.backgroundColors.length == this.valuesCount) {
2071
							if (centerOffset == null)
2072
								centerOffset = this.calculateCenterOffset(this.max);
2073
 
2074
							if (outerPosition == null)
2075
								outerPosition = this.getPointPosition(i, centerOffset);
2076
 
2077
							var previousOuterPosition = this.getPointPosition(i === 0 ? this.valuesCount - 1 : i - 1, centerOffset);
2078
							var nextOuterPosition = this.getPointPosition(i === this.valuesCount - 1 ? 0 : i + 1, centerOffset);
2079
 
2080
							var previousOuterHalfway = { x: (previousOuterPosition.x + outerPosition.x) / 2, y: (previousOuterPosition.y + outerPosition.y) / 2 };
2081
							var nextOuterHalfway = { x: (outerPosition.x + nextOuterPosition.x) / 2, y: (outerPosition.y + nextOuterPosition.y) / 2 };
2082
 
2083
							ctx.beginPath();
2084
							ctx.moveTo(this.xCenter, this.yCenter);
2085
							ctx.lineTo(previousOuterHalfway.x, previousOuterHalfway.y);
2086
							ctx.lineTo(outerPosition.x, outerPosition.y);
2087
							ctx.lineTo(nextOuterHalfway.x, nextOuterHalfway.y);
2088
							ctx.fillStyle = this.backgroundColors[i];
2089
							ctx.fill();
2090
							ctx.closePath();
2091
						}
2092
						// Extra 3px out for some label spacing
2093
						var pointLabelPosition = this.getPointPosition(i, this.calculateCenterOffset(this.max) + 5);
2094
						ctx.font = fontString(this.pointLabelFontSize,this.pointLabelFontStyle,this.pointLabelFontFamily);
2095
						ctx.fillStyle = this.pointLabelFontColor;
2096
 
2097
						var labelsCount = this.labels.length,
2098
							halfLabelsCount = this.labels.length/2,
2099
							quarterLabelsCount = halfLabelsCount/2,
2100
							upperHalf = (i < quarterLabelsCount || i > labelsCount - quarterLabelsCount),
2101
							exactQuarter = (i === quarterLabelsCount || i === labelsCount - quarterLabelsCount);
2102
						if (i === 0){
2103
							ctx.textAlign = 'center';
2104
						} else if(i === halfLabelsCount){
2105
							ctx.textAlign = 'center';
2106
						} else if (i < halfLabelsCount){
2107
							ctx.textAlign = 'left';
2108
						} else {
2109
							ctx.textAlign = 'right';
2110
						}
2111
 
2112
						// Set the correct text baseline based on outer positioning
2113
						if (exactQuarter){
2114
							ctx.textBaseline = 'middle';
2115
						} else if (upperHalf){
2116
							ctx.textBaseline = 'bottom';
2117
						} else {
2118
							ctx.textBaseline = 'top';
2119
						}
2120
 
2121
						ctx.fillText(this.labels[i], pointLabelPosition.x, pointLabelPosition.y);
2122
					}
2123
				}
2124
			}
2125
		}
2126
	});
2127
 
2128
	Chart.animationService = {
2129
		frameDuration: 17,
2130
		animations: [],
2131
		dropFrames: 0,
2132
		addAnimation: function(chartInstance, animationObject) {
2133
			for (var index = 0; index < this.animations.length; ++ index){
2134
				if (this.animations[index].chartInstance === chartInstance){
2135
					// replacing an in progress animation
2136
					this.animations[index].animationObject = animationObject;
2137
					return;
2138
				}
2139
			}
2140
 
2141
			this.animations.push({
2142
				chartInstance: chartInstance,
2143
				animationObject: animationObject
2144
			});
2145
 
2146
			// If there are no animations queued, manually kickstart a digest, for lack of a better word
2147
			if (this.animations.length == 1) {
2148
				helpers.requestAnimFrame.call(window, this.digestWrapper);
2149
			}
2150
		},
2151
		// Cancel the animation for a given chart instance
2152
		cancelAnimation: function(chartInstance) {
2153
			var index = helpers.findNextWhere(this.animations, function(animationWrapper) {
2154
				return animationWrapper.chartInstance === chartInstance;
2155
			});
2156
 
2157
			if (index)
2158
			{
2159
				this.animations.splice(index, 1);
2160
			}
2161
		},
2162
		// calls startDigest with the proper context
2163
		digestWrapper: function() {
2164
			Chart.animationService.startDigest.call(Chart.animationService);
2165
		},
2166
		startDigest: function() {
2167
 
2168
			var startTime = Date.now();
2169
			var framesToDrop = 0;
2170
 
2171
			if(this.dropFrames > 1){
2172
				framesToDrop = Math.floor(this.dropFrames);
2173
				this.dropFrames -= framesToDrop;
2174
			}
2175
 
2176
			for (var i = 0; i < this.animations.length; i++) {
2177
 
2178
				if (this.animations[i].animationObject.currentStep === null){
2179
					this.animations[i].animationObject.currentStep = 0;
2180
				}
2181
 
2182
				this.animations[i].animationObject.currentStep += 1 + framesToDrop;
2183
				if(this.animations[i].animationObject.currentStep > this.animations[i].animationObject.numSteps){
2184
					this.animations[i].animationObject.currentStep = this.animations[i].animationObject.numSteps;
2185
				}
2186
 
2187
				this.animations[i].animationObject.render(this.animations[i].chartInstance, this.animations[i].animationObject);
2188
 
2189
				// Check if executed the last frame.
2190
				if (this.animations[i].animationObject.currentStep == this.animations[i].animationObject.numSteps){
2191
					// Call onAnimationComplete
2192
					this.animations[i].animationObject.onAnimationComplete.call(this.animations[i].chartInstance);
2193
					// Remove the animation.
2194
					this.animations.splice(i, 1);
2195
					// Keep the index in place to offset the splice
2196
					i--;
2197
				}
2198
			}
2199
 
2200
			var endTime = Date.now();
2201
			var delay = endTime - startTime - this.frameDuration;
2202
			var frameDelay = delay / this.frameDuration;
2203
 
2204
			if(frameDelay > 1){
2205
				this.dropFrames += frameDelay;
2206
			}
2207
 
2208
			// Do we have more stuff to animate?
2209
			if (this.animations.length > 0){
2210
				helpers.requestAnimFrame.call(window, this.digestWrapper);
2211
			}
2212
		}
2213
	};
2214
 
2215
	// Attach global event to resize each chart instance when the browser resizes
2216
	helpers.addEvent(window, "resize", (function(){
2217
		// Basic debounce of resize function so it doesn't hurt performance when resizing browser.
2218
		var timeout;
2219
		return function(){
2220
			clearTimeout(timeout);
2221
			timeout = setTimeout(function(){
2222
				each(Chart.instances,function(instance){
2223
					// If the responsive flag is set in the chart instance config
2224
					// Cascade the resize event down to the chart.
2225
					if (instance.options.responsive){
2226
						instance.resize(instance.render, true);
2227
					}
2228
				});
2229
			}, 50);
2230
		};
2231
	})());
2232
 
2233
 
2234
	if (amd) {
2235
		define('Chart', [], function(){
2236
			return Chart;
2237
		});
2238
	} else if (typeof module === 'object' && module.exports) {
2239
		module.exports = Chart;
2240
	}
2241
 
2242
	root.Chart = Chart;
2243
 
2244
	Chart.noConflict = function(){
2245
		root.Chart = previous;
2246
		return Chart;
2247
	};
2248
 
2249
}).call(this);
2250
 
2251
(function(){
2252
	"use strict";
2253
 
2254
	var root = this,
2255
		Chart = root.Chart,
2256
		helpers = Chart.helpers;
2257
 
2258
 
2259
	var defaultConfig = {
2260
		//Boolean - Whether the scale should start at zero, or an order of magnitude down from the lowest value
2261
		scaleBeginAtZero : true,
2262
 
2263
		//Boolean - Whether grid lines are shown across the chart
2264
		scaleShowGridLines : true,
2265
 
2266
		//String - Colour of the grid lines
2267
		scaleGridLineColor : "rgba(0,0,0,.05)",
2268
 
2269
		//Number - Width of the grid lines
2270
		scaleGridLineWidth : 1,
2271
 
2272
		//Boolean - Whether to show horizontal lines (except X axis)
2273
		scaleShowHorizontalLines: true,
2274
 
2275
		//Boolean - Whether to show vertical lines (except Y axis)
2276
		scaleShowVerticalLines: true,
2277
 
2278
		//Boolean - If there is a stroke on each bar
2279
		barShowStroke : true,
2280
 
2281
		//Number - Pixel width of the bar stroke
2282
		barStrokeWidth : 2,
2283
 
2284
		//Number - Spacing between each of the X value sets
2285
		barValueSpacing : 5,
2286
 
2287
		//Number - Spacing between data sets within X values
2288
		barDatasetSpacing : 1,
2289
 
2290
		//String - A legend template
2291
		legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span class=\"<%=name.toLowerCase()%>-legend-icon\" style=\"background-color:<%=datasets[i].fillColor%>\"></span><span class=\"<%=name.toLowerCase()%>-legend-text\"><%if(datasets[i].label){%><%=datasets[i].label%><%}%></span></li><%}%></ul>"
2292
 
2293
	};
2294
 
2295
 
2296
	Chart.Type.extend({
2297
		name: "Bar",
2298
		defaults : defaultConfig,
2299
		initialize:  function(data){
2300
 
2301
			//Expose options as a scope variable here so we can access it in the ScaleClass
2302
			var options = this.options;
2303
 
2304
			this.ScaleClass = Chart.Scale.extend({
2305
				offsetGridLines : true,
2306
				calculateBarX : function(datasetCount, datasetIndex, barIndex){
2307
					//Reusable method for calculating the xPosition of a given bar based on datasetIndex & width of the bar
2308
					var xWidth = this.calculateBaseWidth(),
2309
						xAbsolute = this.calculateX(barIndex) - (xWidth/2),
2310
						barWidth = this.calculateBarWidth(datasetCount);
2311
 
2312
					return xAbsolute + (barWidth * datasetIndex) + (datasetIndex * options.barDatasetSpacing) + barWidth/2;
2313
				},
2314
				calculateBaseWidth : function(){
2315
					return (this.calculateX(1) - this.calculateX(0)) - (2*options.barValueSpacing);
2316
				},
2317
				calculateBarWidth : function(datasetCount){
2318
					//The padding between datasets is to the right of each bar, providing that there are more than 1 dataset
2319
					var baseWidth = this.calculateBaseWidth() - ((datasetCount - 1) * options.barDatasetSpacing);
2320
 
2321
					return (baseWidth / datasetCount);
2322
				}
2323
			});
2324
 
2325
			this.datasets = [];
2326
 
2327
			//Set up tooltip events on the chart
2328
			if (this.options.showTooltips){
2329
				helpers.bindEvents(this, this.options.tooltipEvents, function(evt){
2330
					var activeBars = (evt.type !== 'mouseout') ? this.getBarsAtEvent(evt) : [];
2331
 
2332
					this.eachBars(function(bar){
2333
						bar.restore(['fillColor', 'strokeColor']);
2334
					});
2335
					helpers.each(activeBars, function(activeBar){
2336
						if (activeBar) {
2337
							activeBar.fillColor = activeBar.highlightFill;
2338
							activeBar.strokeColor = activeBar.highlightStroke;
2339
						}
2340
					});
2341
					this.showTooltip(activeBars);
2342
				});
2343
			}
2344
 
2345
			//Declare the extension of the default point, to cater for the options passed in to the constructor
2346
			this.BarClass = Chart.Rectangle.extend({
2347
				strokeWidth : this.options.barStrokeWidth,
2348
				showStroke : this.options.barShowStroke,
2349
				ctx : this.chart.ctx
2350
			});
2351
 
2352
			//Iterate through each of the datasets, and build this into a property of the chart
2353
			helpers.each(data.datasets,function(dataset,datasetIndex){
2354
 
2355
				var datasetObject = {
2356
					label : dataset.label || null,
2357
					fillColor : dataset.fillColor,
2358
					strokeColor : dataset.strokeColor,
2359
					bars : []
2360
				};
2361
 
2362
				this.datasets.push(datasetObject);
2363
 
2364
				helpers.each(dataset.data,function(dataPoint,index){
2365
					//Add a new point for each piece of data, passing any required data to draw.
2366
					datasetObject.bars.push(new this.BarClass({
2367
						value : dataPoint,
2368
						label : data.labels[index],
2369
						datasetLabel: dataset.label,
2370
						strokeColor : (typeof dataset.strokeColor == 'object') ? dataset.strokeColor[index] : dataset.strokeColor,
2371
						fillColor : (typeof dataset.fillColor == 'object') ? dataset.fillColor[index] : dataset.fillColor,
2372
						highlightFill : (dataset.highlightFill) ? (typeof dataset.highlightFill == 'object') ? dataset.highlightFill[index] : dataset.highlightFill : (typeof dataset.fillColor == 'object') ? dataset.fillColor[index] : dataset.fillColor,
2373
						highlightStroke : (dataset.highlightStroke) ? (typeof dataset.highlightStroke == 'object') ? dataset.highlightStroke[index] : dataset.highlightStroke : (typeof dataset.strokeColor == 'object') ? dataset.strokeColor[index] : dataset.strokeColor
2374
					}));
2375
				},this);
2376
 
2377
			},this);
2378
 
2379
			this.buildScale(data.labels);
2380
 
2381
			this.BarClass.prototype.base = this.scale.endPoint;
2382
 
2383
			this.eachBars(function(bar, index, datasetIndex){
2384
				helpers.extend(bar, {
2385
					width : this.scale.calculateBarWidth(this.datasets.length),
2386
					x: this.scale.calculateBarX(this.datasets.length, datasetIndex, index),
2387
					y: this.scale.endPoint
2388
				});
2389
				bar.save();
2390
			}, this);
2391
 
2392
			this.render();
2393
		},
2394
		update : function(){
2395
			this.scale.update();
2396
			// Reset any highlight colours before updating.
2397
			helpers.each(this.activeElements, function(activeElement){
2398
				activeElement.restore(['fillColor', 'strokeColor']);
2399
			});
2400
 
2401
			this.eachBars(function(bar){
2402
				bar.save();
2403
			});
2404
			this.render();
2405
		},
2406
		eachBars : function(callback){
2407
			helpers.each(this.datasets,function(dataset, datasetIndex){
2408
				helpers.each(dataset.bars, callback, this, datasetIndex);
2409
			},this);
2410
		},
2411
		getBarsAtEvent : function(e){
2412
			var barsArray = [],
2413
				eventPosition = helpers.getRelativePosition(e),
2414
				datasetIterator = function(dataset){
2415
					barsArray.push(dataset.bars[barIndex]);
2416
				},
2417
				barIndex;
2418
 
2419
			for (var datasetIndex = 0; datasetIndex < this.datasets.length; datasetIndex++) {
2420
				for (barIndex = 0; barIndex < this.datasets[datasetIndex].bars.length; barIndex++) {
2421
					if (this.datasets[datasetIndex].bars[barIndex].inRange(eventPosition.x,eventPosition.y)){
2422
						helpers.each(this.datasets, datasetIterator);
2423
						return barsArray;
2424
					}
2425
				}
2426
			}
2427
 
2428
			return barsArray;
2429
		},
2430
		buildScale : function(labels){
2431
			var self = this;
2432
 
2433
			var dataTotal = function(){
2434
				var values = [];
2435
				self.eachBars(function(bar){
2436
					values.push(bar.value);
2437
				});
2438
				return values;
2439
			};
2440
 
2441
			var scaleOptions = {
2442
				templateString : this.options.scaleLabel,
2443
				height : this.chart.height,
2444
				width : this.chart.width,
2445
				ctx : this.chart.ctx,
2446
				textColor : this.options.scaleFontColor,
2447
				fontSize : this.options.scaleFontSize,
2448
				fontStyle : this.options.scaleFontStyle,
2449
				fontFamily : this.options.scaleFontFamily,
2450
				valuesCount : labels.length,
2451
				beginAtZero : this.options.scaleBeginAtZero,
2452
				integersOnly : this.options.scaleIntegersOnly,
2453
				calculateYRange: function(currentHeight){
2454
					var updatedRanges = helpers.calculateScaleRange(
2455
						dataTotal(),
2456
						currentHeight,
2457
						this.fontSize,
2458
						this.beginAtZero,
2459
						this.integersOnly
2460
					);
2461
					helpers.extend(this, updatedRanges);
2462
				},
2463
				xLabels : labels,
2464
				font : helpers.fontString(this.options.scaleFontSize, this.options.scaleFontStyle, this.options.scaleFontFamily),
2465
				lineWidth : this.options.scaleLineWidth,
2466
				lineColor : this.options.scaleLineColor,
2467
				showHorizontalLines : this.options.scaleShowHorizontalLines,
2468
				showVerticalLines : this.options.scaleShowVerticalLines,
2469
				gridLineWidth : (this.options.scaleShowGridLines) ? this.options.scaleGridLineWidth : 0,
2470
				gridLineColor : (this.options.scaleShowGridLines) ? this.options.scaleGridLineColor : "rgba(0,0,0,0)",
2471
				padding : (this.options.showScale) ? 0 : (this.options.barShowStroke) ? this.options.barStrokeWidth : 0,
2472
				showLabels : this.options.scaleShowLabels,
2473
				display : this.options.showScale
2474
			};
2475
 
2476
			if (this.options.scaleOverride){
2477
				helpers.extend(scaleOptions, {
2478
					calculateYRange: helpers.noop,
2479
					steps: this.options.scaleSteps,
2480
					stepValue: this.options.scaleStepWidth,
2481
					min: this.options.scaleStartValue,
2482
					max: this.options.scaleStartValue + (this.options.scaleSteps * this.options.scaleStepWidth)
2483
				});
2484
			}
2485
 
2486
			this.scale = new this.ScaleClass(scaleOptions);
2487
		},
2488
		addData : function(valuesArray,label){
2489
			//Map the values array for each of the datasets
2490
			helpers.each(valuesArray,function(value,datasetIndex){
2491
				//Add a new point for each piece of data, passing any required data to draw.
2492
				this.datasets[datasetIndex].bars.push(new this.BarClass({
2493
					value : value,
2494
					label : label,
2495
					datasetLabel: this.datasets[datasetIndex].label,
2496
					x: this.scale.calculateBarX(this.datasets.length, datasetIndex, this.scale.valuesCount+1),
2497
					y: this.scale.endPoint,
2498
					width : this.scale.calculateBarWidth(this.datasets.length),
2499
					base : this.scale.endPoint,
2500
					strokeColor : this.datasets[datasetIndex].strokeColor,
2501
					fillColor : this.datasets[datasetIndex].fillColor
2502
				}));
2503
			},this);
2504
 
2505
			this.scale.addXLabel(label);
2506
			//Then re-render the chart.
2507
			this.update();
2508
		},
2509
		removeData : function(){
2510
			this.scale.removeXLabel();
2511
			//Then re-render the chart.
2512
			helpers.each(this.datasets,function(dataset){
2513
				dataset.bars.shift();
2514
			},this);
2515
			this.update();
2516
		},
2517
		reflow : function(){
2518
			helpers.extend(this.BarClass.prototype,{
2519
				y: this.scale.endPoint,
2520
				base : this.scale.endPoint
2521
			});
2522
			var newScaleProps = helpers.extend({
2523
				height : this.chart.height,
2524
				width : this.chart.width
2525
			});
2526
			this.scale.update(newScaleProps);
2527
		},
2528
		draw : function(ease){
2529
			var easingDecimal = ease || 1;
2530
			this.clear();
2531
 
2532
			var ctx = this.chart.ctx;
2533
 
2534
			this.scale.draw(easingDecimal);
2535
 
2536
			//Draw all the bars for each dataset
2537
			helpers.each(this.datasets,function(dataset,datasetIndex){
2538
				helpers.each(dataset.bars,function(bar,index){
2539
					if (bar.hasValue()){
2540
						bar.base = this.scale.endPoint;
2541
						//Transition then draw
2542
						bar.transition({
2543
							x : this.scale.calculateBarX(this.datasets.length, datasetIndex, index),
2544
							y : this.scale.calculateY(bar.value),
2545
							width : this.scale.calculateBarWidth(this.datasets.length)
2546
						}, easingDecimal).draw();
2547
					}
2548
				},this);
2549
 
2550
			},this);
2551
		}
2552
	});
2553
 
2554
 
2555
}).call(this);
2556
 
2557
(function(){
2558
	"use strict";
2559
 
2560
	var root = this,
2561
		Chart = root.Chart,
2562
		//Cache a local reference to Chart.helpers
2563
		helpers = Chart.helpers;
2564
 
2565
	var defaultConfig = {
2566
		//Boolean - Whether we should show a stroke on each segment
2567
		segmentShowStroke : true,
2568
 
2569
		//String - The colour of each segment stroke
2570
		segmentStrokeColor : "#fff",
2571
 
2572
		//Number - The width of each segment stroke
2573
		segmentStrokeWidth : 2,
2574
 
2575
		//The percentage of the chart that we cut out of the middle.
2576
		percentageInnerCutout : 50,
2577
 
2578
		//Number - Amount of animation steps
2579
		animationSteps : 100,
2580
 
2581
		//String - Animation easing effect
2582
		animationEasing : "easeOutBounce",
2583
 
2584
		//Boolean - Whether we animate the rotation of the Doughnut
2585
		animateRotate : true,
2586
 
2587
		//Boolean - Whether we animate scaling the Doughnut from the centre
2588
		animateScale : false,
2589
 
2590
		//String - A legend template
2591
		legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<segments.length; i++){%><li><span class=\"<%=name.toLowerCase()%>-legend-icon\" style=\"background-color:<%=segments[i].fillColor%>\"></span><span class=\"<%=name.toLowerCase()%>-legend-text\"><%if(segments[i].label){%><%=segments[i].label%><%}%></span></li><%}%></ul>"
2592
 
2593
	};
2594
 
2595
	Chart.Type.extend({
2596
		//Passing in a name registers this chart in the Chart namespace
2597
		name: "Doughnut",
2598
		//Providing a defaults will also register the defaults in the chart namespace
2599
		defaults : defaultConfig,
2600
		//Initialize is fired when the chart is initialized - Data is passed in as a parameter
2601
		//Config is automatically merged by the core of Chart.js, and is available at this.options
2602
		initialize:  function(data){
2603
 
2604
			//Declare segments as a static property to prevent inheriting across the Chart type prototype
2605
			this.segments = [];
2606
			this.outerRadius = (helpers.min([this.chart.width,this.chart.height]) -	this.options.segmentStrokeWidth/2)/2;
2607
 
2608
			this.SegmentArc = Chart.Arc.extend({
2609
				ctx : this.chart.ctx,
2610
				x : this.chart.width/2,
2611
				y : this.chart.height/2
2612
			});
2613
 
2614
			//Set up tooltip events on the chart
2615
			if (this.options.showTooltips){
2616
				helpers.bindEvents(this, this.options.tooltipEvents, function(evt){
2617
					var activeSegments = (evt.type !== 'mouseout') ? this.getSegmentsAtEvent(evt) : [];
2618
 
2619
					helpers.each(this.segments,function(segment){
2620
						segment.restore(["fillColor"]);
2621
					});
2622
					helpers.each(activeSegments,function(activeSegment){
2623
						activeSegment.fillColor = activeSegment.highlightColor;
2624
					});
2625
					this.showTooltip(activeSegments);
2626
				});
2627
			}
2628
			this.calculateTotal(data);
2629
 
2630
			helpers.each(data,function(datapoint, index){
2631
				if (!datapoint.color) {
2632
					datapoint.color = 'hsl(' + (360 * index / data.length) + ', 100%, 50%)';
2633
				}
2634
				this.addData(datapoint, index, true);
2635
			},this);
2636
 
2637
			this.render();
2638
		},
2639
		getSegmentsAtEvent : function(e){
2640
			var segmentsArray = [];
2641
 
2642
			var location = helpers.getRelativePosition(e);
2643
 
2644
			helpers.each(this.segments,function(segment){
2645
				if (segment.inRange(location.x,location.y)) segmentsArray.push(segment);
2646
			},this);
2647
			return segmentsArray;
2648
		},
2649
		addData : function(segment, atIndex, silent){
2650
			var index = atIndex !== undefined ? atIndex : this.segments.length;
2651
			if ( typeof(segment.color) === "undefined" ) {
2652
				segment.color = Chart.defaults.global.segmentColorDefault[index % Chart.defaults.global.segmentColorDefault.length];
2653
				segment.highlight = Chart.defaults.global.segmentHighlightColorDefaults[index % Chart.defaults.global.segmentHighlightColorDefaults.length];
2654
			}
2655
			this.segments.splice(index, 0, new this.SegmentArc({
2656
				value : segment.value,
2657
				outerRadius : (this.options.animateScale) ? 0 : this.outerRadius,
2658
				innerRadius : (this.options.animateScale) ? 0 : (this.outerRadius/100) * this.options.percentageInnerCutout,
2659
				fillColor : segment.color,
2660
				highlightColor : segment.highlight || segment.color,
2661
				showStroke : this.options.segmentShowStroke,
2662
				strokeWidth : this.options.segmentStrokeWidth,
2663
				strokeColor : this.options.segmentStrokeColor,
2664
				startAngle : Math.PI * 1.5,
2665
				circumference : (this.options.animateRotate) ? 0 : this.calculateCircumference(segment.value),
2666
				label : segment.label
2667
			}));
2668
			if (!silent){
2669
				this.reflow();
2670
				this.update();
2671
			}
2672
		},
2673
		calculateCircumference : function(value) {
2674
			if ( this.total > 0 ) {
2675
				return (Math.PI*2)*(value / this.total);
2676
			} else {
2677
				return 0;
2678
			}
2679
		},
2680
		calculateTotal : function(data){
2681
			this.total = 0;
2682
			helpers.each(data,function(segment){
2683
				this.total += Math.abs(segment.value);
2684
			},this);
2685
		},
2686
		update : function(){
2687
			this.calculateTotal(this.segments);
2688
 
2689
			// Reset any highlight colours before updating.
2690
			helpers.each(this.activeElements, function(activeElement){
2691
				activeElement.restore(['fillColor']);
2692
			});
2693
 
2694
			helpers.each(this.segments,function(segment){
2695
				segment.save();
2696
			});
2697
			this.render();
2698
		},
2699
 
2700
		removeData: function(atIndex){
2701
			var indexToDelete = (helpers.isNumber(atIndex)) ? atIndex : this.segments.length-1;
2702
			this.segments.splice(indexToDelete, 1);
2703
			this.reflow();
2704
			this.update();
2705
		},
2706
 
2707
		reflow : function(){
2708
			helpers.extend(this.SegmentArc.prototype,{
2709
				x : this.chart.width/2,
2710
				y : this.chart.height/2
2711
			});
2712
			this.outerRadius = (helpers.min([this.chart.width,this.chart.height]) -	this.options.segmentStrokeWidth/2)/2;
2713
			helpers.each(this.segments, function(segment){
2714
				segment.update({
2715
					outerRadius : this.outerRadius,
2716
					innerRadius : (this.outerRadius/100) * this.options.percentageInnerCutout
2717
				});
2718
			}, this);
2719
		},
2720
		draw : function(easeDecimal){
2721
			var animDecimal = (easeDecimal) ? easeDecimal : 1;
2722
			this.clear();
2723
			helpers.each(this.segments,function(segment,index){
2724
				segment.transition({
2725
					circumference : this.calculateCircumference(segment.value),
2726
					outerRadius : this.outerRadius,
2727
					innerRadius : (this.outerRadius/100) * this.options.percentageInnerCutout
2728
				},animDecimal);
2729
 
2730
				segment.endAngle = segment.startAngle + segment.circumference;
2731
 
2732
				segment.draw();
2733
				if (index === 0){
2734
					segment.startAngle = Math.PI * 1.5;
2735
				}
2736
				//Check to see if it's the last segment, if not get the next and update the start angle
2737
				if (index < this.segments.length-1){
2738
					this.segments[index+1].startAngle = segment.endAngle;
2739
				}
2740
			},this);
2741
 
2742
		}
2743
	});
2744
 
2745
	Chart.types.Doughnut.extend({
2746
		name : "Pie",
2747
		defaults : helpers.merge(defaultConfig,{percentageInnerCutout : 0})
2748
	});
2749
 
2750
}).call(this);
2751
 
2752
(function(){
2753
	"use strict";
2754
 
2755
	var root = this,
2756
		Chart = root.Chart,
2757
		helpers = Chart.helpers;
2758
 
2759
	var defaultConfig = {
2760
 
2761
		///Boolean - Whether grid lines are shown across the chart
2762
		scaleShowGridLines : true,
2763
 
2764
		//String - Colour of the grid lines
2765
		scaleGridLineColor : "rgba(0,0,0,.05)",
2766
 
2767
		//Number - Width of the grid lines
2768
		scaleGridLineWidth : 1,
2769
 
2770
		//Boolean - Whether to show horizontal lines (except X axis)
2771
		scaleShowHorizontalLines: true,
2772
 
2773
		//Boolean - Whether to show vertical lines (except Y axis)
2774
		scaleShowVerticalLines: true,
2775
 
2776
		//Boolean - Whether the line is curved between points
2777
		bezierCurve : true,
2778
 
2779
		//Number - Tension of the bezier curve between points
2780
		bezierCurveTension : 0.4,
2781
 
2782
		//Boolean - Whether to show a dot for each point
2783
		pointDot : true,
2784
 
2785
		//Number - Radius of each point dot in pixels
2786
		pointDotRadius : 4,
2787
 
2788
		//Number - Pixel width of point dot stroke
2789
		pointDotStrokeWidth : 1,
2790
 
2791
		//Number - amount extra to add to the radius to cater for hit detection outside the drawn point
2792
		pointHitDetectionRadius : 20,
2793
 
2794
		//Boolean - Whether to show a stroke for datasets
2795
		datasetStroke : true,
2796
 
2797
		//Number - Pixel width of dataset stroke
2798
		datasetStrokeWidth : 2,
2799
 
2800
		//Boolean - Whether to fill the dataset with a colour
2801
		datasetFill : true,
2802
 
2803
		//String - A legend template
2804
		legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span class=\"<%=name.toLowerCase()%>-legend-icon\" style=\"background-color:<%=datasets[i].strokeColor%>\"></span><span class=\"<%=name.toLowerCase()%>-legend-text\"><%if(datasets[i].label){%><%=datasets[i].label%><%}%></span></li><%}%></ul>",
2805
 
2806
		//Boolean - Whether to horizontally center the label and point dot inside the grid
2807
		offsetGridLines : false
2808
 
2809
	};
2810
 
2811
 
2812
	Chart.Type.extend({
2813
		name: "Line",
2814
		defaults : defaultConfig,
2815
		initialize:  function(data){
2816
			//Declare the extension of the default point, to cater for the options passed in to the constructor
2817
			this.PointClass = Chart.Point.extend({
2818
				offsetGridLines : this.options.offsetGridLines,
2819
				strokeWidth : this.options.pointDotStrokeWidth,
2820
				radius : this.options.pointDotRadius,
2821
				display: this.options.pointDot,
2822
				hitDetectionRadius : this.options.pointHitDetectionRadius,
2823
				ctx : this.chart.ctx,
2824
				inRange : function(mouseX){
2825
					return (Math.pow(mouseX-this.x, 2) < Math.pow(this.radius + this.hitDetectionRadius,2));
2826
				}
2827
			});
2828
 
2829
			this.datasets = [];
2830
 
2831
			//Set up tooltip events on the chart
2832
			if (this.options.showTooltips){
2833
				helpers.bindEvents(this, this.options.tooltipEvents, function(evt){
2834
					var activePoints = (evt.type !== 'mouseout') ? this.getPointsAtEvent(evt) : [];
2835
					this.eachPoints(function(point){
2836
						point.restore(['fillColor', 'strokeColor']);
2837
					});
2838
					helpers.each(activePoints, function(activePoint){
2839
						activePoint.fillColor = activePoint.highlightFill;
2840
						activePoint.strokeColor = activePoint.highlightStroke;
2841
					});
2842
					this.showTooltip(activePoints);
2843
				});
2844
			}
2845
 
2846
			//Iterate through each of the datasets, and build this into a property of the chart
2847
			helpers.each(data.datasets,function(dataset){
2848
 
2849
				var datasetObject = {
2850
					label : dataset.label || null,
2851
					fillColor : dataset.fillColor,
2852
					strokeColor : dataset.strokeColor,
2853
					pointColor : dataset.pointColor,
2854
					pointStrokeColor : dataset.pointStrokeColor,
2855
					points : []
2856
				};
2857
 
2858
				this.datasets.push(datasetObject);
2859
 
2860
 
2861
				helpers.each(dataset.data,function(dataPoint,index){
2862
					//Add a new point for each piece of data, passing any required data to draw.
2863
					datasetObject.points.push(new this.PointClass({
2864
						value : dataPoint,
2865
						label : data.labels[index],
2866
						datasetLabel: dataset.label,
2867
						strokeColor : dataset.pointStrokeColor,
2868
						fillColor : dataset.pointColor,
2869
						highlightFill : dataset.pointHighlightFill || dataset.pointColor,
2870
						highlightStroke : dataset.pointHighlightStroke || dataset.pointStrokeColor
2871
					}));
2872
				},this);
2873
 
2874
				this.buildScale(data.labels);
2875
 
2876
 
2877
				this.eachPoints(function(point, index){
2878
					helpers.extend(point, {
2879
						x: this.scale.calculateX(index),
2880
						y: this.scale.endPoint
2881
					});
2882
					point.save();
2883
				}, this);
2884
 
2885
			},this);
2886
 
2887
 
2888
			this.render();
2889
		},
2890
		update : function(){
2891
			this.scale.update();
2892
			// Reset any highlight colours before updating.
2893
			helpers.each(this.activeElements, function(activeElement){
2894
				activeElement.restore(['fillColor', 'strokeColor']);
2895
			});
2896
			this.eachPoints(function(point){
2897
				point.save();
2898
			});
2899
			this.render();
2900
		},
2901
		eachPoints : function(callback){
2902
			helpers.each(this.datasets,function(dataset){
2903
				helpers.each(dataset.points,callback,this);
2904
			},this);
2905
		},
2906
		getPointsAtEvent : function(e){
2907
			var pointsArray = [],
2908
				eventPosition = helpers.getRelativePosition(e);
2909
			helpers.each(this.datasets,function(dataset){
2910
				helpers.each(dataset.points,function(point){
2911
					if (point.inRange(eventPosition.x,eventPosition.y)) pointsArray.push(point);
2912
				});
2913
			},this);
2914
			return pointsArray;
2915
		},
2916
		buildScale : function(labels){
2917
			var self = this;
2918
 
2919
			var dataTotal = function(){
2920
				var values = [];
2921
				self.eachPoints(function(point){
2922
					values.push(point.value);
2923
				});
2924
 
2925
				return values;
2926
			};
2927
 
2928
			var scaleOptions = {
2929
				templateString : this.options.scaleLabel,
2930
				height : this.chart.height,
2931
				width : this.chart.width,
2932
				ctx : this.chart.ctx,
2933
				textColor : this.options.scaleFontColor,
2934
				offsetGridLines : this.options.offsetGridLines,
2935
				fontSize : this.options.scaleFontSize,
2936
				fontStyle : this.options.scaleFontStyle,
2937
				fontFamily : this.options.scaleFontFamily,
2938
				valuesCount : labels.length,
2939
				beginAtZero : this.options.scaleBeginAtZero,
2940
				integersOnly : this.options.scaleIntegersOnly,
2941
				calculateYRange : function(currentHeight){
2942
					var updatedRanges = helpers.calculateScaleRange(
2943
						dataTotal(),
2944
						currentHeight,
2945
						this.fontSize,
2946
						this.beginAtZero,
2947
						this.integersOnly
2948
					);
2949
					helpers.extend(this, updatedRanges);
2950
				},
2951
				xLabels : labels,
2952
				font : helpers.fontString(this.options.scaleFontSize, this.options.scaleFontStyle, this.options.scaleFontFamily),
2953
				lineWidth : this.options.scaleLineWidth,
2954
				lineColor : this.options.scaleLineColor,
2955
				showHorizontalLines : this.options.scaleShowHorizontalLines,
2956
				showVerticalLines : this.options.scaleShowVerticalLines,
2957
				gridLineWidth : (this.options.scaleShowGridLines) ? this.options.scaleGridLineWidth : 0,
2958
				gridLineColor : (this.options.scaleShowGridLines) ? this.options.scaleGridLineColor : "rgba(0,0,0,0)",
2959
				padding: (this.options.showScale) ? 0 : this.options.pointDotRadius + this.options.pointDotStrokeWidth,
2960
				showLabels : this.options.scaleShowLabels,
2961
				display : this.options.showScale
2962
			};
2963
 
2964
			if (this.options.scaleOverride){
2965
				helpers.extend(scaleOptions, {
2966
					calculateYRange: helpers.noop,
2967
					steps: this.options.scaleSteps,
2968
					stepValue: this.options.scaleStepWidth,
2969
					min: this.options.scaleStartValue,
2970
					max: this.options.scaleStartValue + (this.options.scaleSteps * this.options.scaleStepWidth)
2971
				});
2972
			}
2973
 
2974
 
2975
			this.scale = new Chart.Scale(scaleOptions);
2976
		},
2977
		addData : function(valuesArray,label){
2978
			//Map the values array for each of the datasets
2979
 
2980
			helpers.each(valuesArray,function(value,datasetIndex){
2981
				//Add a new point for each piece of data, passing any required data to draw.
2982
				this.datasets[datasetIndex].points.push(new this.PointClass({
2983
					value : value,
2984
					label : label,
2985
					datasetLabel: this.datasets[datasetIndex].label,
2986
					x: this.scale.calculateX(this.scale.valuesCount+1),
2987
					y: this.scale.endPoint,
2988
					strokeColor : this.datasets[datasetIndex].pointStrokeColor,
2989
					fillColor : this.datasets[datasetIndex].pointColor
2990
				}));
2991
			},this);
2992
 
2993
			this.scale.addXLabel(label);
2994
			//Then re-render the chart.
2995
			this.update();
2996
		},
2997
		removeData : function(){
2998
			this.scale.removeXLabel();
2999
			//Then re-render the chart.
3000
			helpers.each(this.datasets,function(dataset){
3001
				dataset.points.shift();
3002
			},this);
3003
			this.update();
3004
		},
3005
		reflow : function(){
3006
			var newScaleProps = helpers.extend({
3007
				height : this.chart.height,
3008
				width : this.chart.width
3009
			});
3010
			this.scale.update(newScaleProps);
3011
		},
3012
		draw : function(ease){
3013
			var easingDecimal = ease || 1;
3014
			this.clear();
3015
 
3016
			var ctx = this.chart.ctx;
3017
 
3018
			// Some helper methods for getting the next/prev points
3019
			var hasValue = function(item){
3020
				return item.value !== null;
3021
			},
3022
			nextPoint = function(point, collection, index){
3023
				return helpers.findNextWhere(collection, hasValue, index) || point;
3024
			},
3025
			previousPoint = function(point, collection, index){
3026
				return helpers.findPreviousWhere(collection, hasValue, index) || point;
3027
			};
3028
 
3029
			if (!this.scale) return;
3030
			this.scale.draw(easingDecimal);
3031
 
3032
 
3033
			helpers.each(this.datasets,function(dataset){
3034
				var pointsWithValues = helpers.where(dataset.points, hasValue);
3035
 
3036
				//Transition each point first so that the line and point drawing isn't out of sync
3037
				//We can use this extra loop to calculate the control points of this dataset also in this loop
3038
 
3039
				helpers.each(dataset.points, function(point, index){
3040
					if (point.hasValue()){
3041
						point.transition({
3042
							y : this.scale.calculateY(point.value),
3043
							x : this.scale.calculateX(index)
3044
						}, easingDecimal);
3045
					}
3046
				},this);
3047
 
3048
 
3049
				// Control points need to be calculated in a separate loop, because we need to know the current x/y of the point
3050
				// This would cause issues when there is no animation, because the y of the next point would be 0, so beziers would be skewed
3051
				if (this.options.bezierCurve){
3052
					helpers.each(pointsWithValues, function(point, index){
3053
						var tension = (index > 0 && index < pointsWithValues.length - 1) ? this.options.bezierCurveTension : 0;
3054
						point.controlPoints = helpers.splineCurve(
3055
							previousPoint(point, pointsWithValues, index),
3056
							point,
3057
							nextPoint(point, pointsWithValues, index),
3058
							tension
3059
						);
3060
 
3061
						// Prevent the bezier going outside of the bounds of the graph
3062
 
3063
						// Cap puter bezier handles to the upper/lower scale bounds
3064
						if (point.controlPoints.outer.y > this.scale.endPoint){
3065
							point.controlPoints.outer.y = this.scale.endPoint;
3066
						}
3067
						else if (point.controlPoints.outer.y < this.scale.startPoint){
3068
							point.controlPoints.outer.y = this.scale.startPoint;
3069
						}
3070
 
3071
						// Cap inner bezier handles to the upper/lower scale bounds
3072
						if (point.controlPoints.inner.y > this.scale.endPoint){
3073
							point.controlPoints.inner.y = this.scale.endPoint;
3074
						}
3075
						else if (point.controlPoints.inner.y < this.scale.startPoint){
3076
							point.controlPoints.inner.y = this.scale.startPoint;
3077
						}
3078
					},this);
3079
				}
3080
 
3081
 
3082
				//Draw the line between all the points
3083
				ctx.lineWidth = this.options.datasetStrokeWidth;
3084
				ctx.strokeStyle = dataset.strokeColor;
3085
				ctx.beginPath();
3086
 
3087
				helpers.each(pointsWithValues, function(point, index){
3088
					if (index === 0){
3089
						ctx.moveTo(point.x, point.y);
3090
					}
3091
					else{
3092
						if(this.options.bezierCurve){
3093
							var previous = previousPoint(point, pointsWithValues, index);
3094
 
3095
							ctx.bezierCurveTo(
3096
								previous.controlPoints.outer.x,
3097
								previous.controlPoints.outer.y,
3098
								point.controlPoints.inner.x,
3099
								point.controlPoints.inner.y,
3100
								point.x,
3101
								point.y
3102
							);
3103
						}
3104
						else{
3105
							ctx.lineTo(point.x,point.y);
3106
						}
3107
					}
3108
				}, this);
3109
 
3110
				if (this.options.datasetStroke) {
3111
					ctx.stroke();
3112
				}
3113
 
3114
				if (this.options.datasetFill && pointsWithValues.length > 0){
3115
					//Round off the line by going to the base of the chart, back to the start, then fill.
3116
					ctx.lineTo(pointsWithValues[pointsWithValues.length - 1].x, this.scale.endPoint);
3117
					ctx.lineTo(pointsWithValues[0].x, this.scale.endPoint);
3118
					ctx.fillStyle = dataset.fillColor;
3119
					ctx.closePath();
3120
					ctx.fill();
3121
				}
3122
 
3123
				//Now draw the points over the line
3124
				//A little inefficient double looping, but better than the line
3125
				//lagging behind the point positions
3126
				helpers.each(pointsWithValues,function(point){
3127
					point.draw();
3128
				});
3129
			},this);
3130
		}
3131
	});
3132
 
3133
 
3134
}).call(this);
3135
 
3136
(function(){
3137
	"use strict";
3138
 
3139
	var root = this,
3140
		Chart = root.Chart,
3141
		//Cache a local reference to Chart.helpers
3142
		helpers = Chart.helpers;
3143
 
3144
	var defaultConfig = {
3145
		//Boolean - Show a backdrop to the scale label
3146
		scaleShowLabelBackdrop : true,
3147
 
3148
		//String - The colour of the label backdrop
3149
		scaleBackdropColor : "rgba(255,255,255,0.75)",
3150
 
3151
		// Boolean - Whether the scale should begin at zero
3152
		scaleBeginAtZero : true,
3153
 
3154
		//Number - The backdrop padding above & below the label in pixels
3155
		scaleBackdropPaddingY : 2,
3156
 
3157
		//Number - The backdrop padding to the side of the label in pixels
3158
		scaleBackdropPaddingX : 2,
3159
 
3160
		//Boolean - Show line for each value in the scale
3161
		scaleShowLine : true,
3162
 
3163
		//Boolean - Stroke a line around each segment in the chart
3164
		segmentShowStroke : true,
3165
 
3166
		//String - The colour of the stroke on each segment.
3167
		segmentStrokeColor : "#fff",
3168
 
3169
		//Number - The width of the stroke value in pixels
3170
		segmentStrokeWidth : 2,
3171
 
3172
		//Number - Amount of animation steps
3173
		animationSteps : 100,
3174
 
3175
		//String - Animation easing effect.
3176
		animationEasing : "easeOutBounce",
3177
 
3178
		//Boolean - Whether to animate the rotation of the chart
3179
		animateRotate : true,
3180
 
3181
		//Boolean - Whether to animate scaling the chart from the centre
3182
		animateScale : false,
3183
 
3184
		//String - A legend template
3185
		legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<segments.length; i++){%><li><span class=\"<%=name.toLowerCase()%>-legend-icon\" style=\"background-color:<%=segments[i].fillColor%>\"></span><span class=\"<%=name.toLowerCase()%>-legend-text\"><%if(segments[i].label){%><%=segments[i].label%><%}%></span></li><%}%></ul>"
3186
	};
3187
 
3188
 
3189
	Chart.Type.extend({
3190
		//Passing in a name registers this chart in the Chart namespace
3191
		name: "PolarArea",
3192
		//Providing a defaults will also register the defaults in the chart namespace
3193
		defaults : defaultConfig,
3194
		//Initialize is fired when the chart is initialized - Data is passed in as a parameter
3195
		//Config is automatically merged by the core of Chart.js, and is available at this.options
3196
		initialize:  function(data){
3197
			this.segments = [];
3198
			//Declare segment class as a chart instance specific class, so it can share props for this instance
3199
			this.SegmentArc = Chart.Arc.extend({
3200
				showStroke : this.options.segmentShowStroke,
3201
				strokeWidth : this.options.segmentStrokeWidth,
3202
				strokeColor : this.options.segmentStrokeColor,
3203
				ctx : this.chart.ctx,
3204
				innerRadius : 0,
3205
				x : this.chart.width/2,
3206
				y : this.chart.height/2
3207
			});
3208
			this.scale = new Chart.RadialScale({
3209
				display: this.options.showScale,
3210
				fontStyle: this.options.scaleFontStyle,
3211
				fontSize: this.options.scaleFontSize,
3212
				fontFamily: this.options.scaleFontFamily,
3213
				fontColor: this.options.scaleFontColor,
3214
				showLabels: this.options.scaleShowLabels,
3215
				showLabelBackdrop: this.options.scaleShowLabelBackdrop,
3216
				backdropColor: this.options.scaleBackdropColor,
3217
				backdropPaddingY : this.options.scaleBackdropPaddingY,
3218
				backdropPaddingX: this.options.scaleBackdropPaddingX,
3219
				lineWidth: (this.options.scaleShowLine) ? this.options.scaleLineWidth : 0,
3220
				lineColor: this.options.scaleLineColor,
3221
				lineArc: true,
3222
				width: this.chart.width,
3223
				height: this.chart.height,
3224
				xCenter: this.chart.width/2,
3225
				yCenter: this.chart.height/2,
3226
				ctx : this.chart.ctx,
3227
				templateString: this.options.scaleLabel,
3228
				valuesCount: data.length
3229
			});
3230
 
3231
			this.updateScaleRange(data);
3232
 
3233
			this.scale.update();
3234
 
3235
			helpers.each(data,function(segment,index){
3236
				this.addData(segment,index,true);
3237
			},this);
3238
 
3239
			//Set up tooltip events on the chart
3240
			if (this.options.showTooltips){
3241
				helpers.bindEvents(this, this.options.tooltipEvents, function(evt){
3242
					var activeSegments = (evt.type !== 'mouseout') ? this.getSegmentsAtEvent(evt) : [];
3243
					helpers.each(this.segments,function(segment){
3244
						segment.restore(["fillColor"]);
3245
					});
3246
					helpers.each(activeSegments,function(activeSegment){
3247
						activeSegment.fillColor = activeSegment.highlightColor;
3248
					});
3249
					this.showTooltip(activeSegments);
3250
				});
3251
			}
3252
 
3253
			this.render();
3254
		},
3255
		getSegmentsAtEvent : function(e){
3256
			var segmentsArray = [];
3257
 
3258
			var location = helpers.getRelativePosition(e);
3259
 
3260
			helpers.each(this.segments,function(segment){
3261
				if (segment.inRange(location.x,location.y)) segmentsArray.push(segment);
3262
			},this);
3263
			return segmentsArray;
3264
		},
3265
		addData : function(segment, atIndex, silent){
3266
			var index = atIndex || this.segments.length;
3267
 
3268
			this.segments.splice(index, 0, new this.SegmentArc({
3269
				fillColor: segment.color,
3270
				highlightColor: segment.highlight || segment.color,
3271
				label: segment.label,
3272
				value: segment.value,
3273
				outerRadius: (this.options.animateScale) ? 0 : this.scale.calculateCenterOffset(segment.value),
3274
				circumference: (this.options.animateRotate) ? 0 : this.scale.getCircumference(),
3275
				startAngle: Math.PI * 1.5
3276
			}));
3277
			if (!silent){
3278
				this.reflow();
3279
				this.update();
3280
			}
3281
		},
3282
		removeData: function(atIndex){
3283
			var indexToDelete = (helpers.isNumber(atIndex)) ? atIndex : this.segments.length-1;
3284
			this.segments.splice(indexToDelete, 1);
3285
			this.reflow();
3286
			this.update();
3287
		},
3288
		calculateTotal: function(data){
3289
			this.total = 0;
3290
			helpers.each(data,function(segment){
3291
				this.total += segment.value;
3292
			},this);
3293
			this.scale.valuesCount = this.segments.length;
3294
		},
3295
		updateScaleRange: function(datapoints){
3296
			var valuesArray = [];
3297
			helpers.each(datapoints,function(segment){
3298
				valuesArray.push(segment.value);
3299
			});
3300
 
3301
			var scaleSizes = (this.options.scaleOverride) ?
3302
				{
3303
					steps: this.options.scaleSteps,
3304
					stepValue: this.options.scaleStepWidth,
3305
					min: this.options.scaleStartValue,
3306
					max: this.options.scaleStartValue + (this.options.scaleSteps * this.options.scaleStepWidth)
3307
				} :
3308
				helpers.calculateScaleRange(
3309
					valuesArray,
3310
					helpers.min([this.chart.width, this.chart.height])/2,
3311
					this.options.scaleFontSize,
3312
					this.options.scaleBeginAtZero,
3313
					this.options.scaleIntegersOnly
3314
				);
3315
 
3316
			helpers.extend(
3317
				this.scale,
3318
				scaleSizes,
3319
				{
3320
					size: helpers.min([this.chart.width, this.chart.height]),
3321
					xCenter: this.chart.width/2,
3322
					yCenter: this.chart.height/2
3323
				}
3324
			);
3325
 
3326
		},
3327
		update : function(){
3328
			this.calculateTotal(this.segments);
3329
 
3330
			helpers.each(this.segments,function(segment){
3331
				segment.save();
3332
			});
3333
 
3334
			this.reflow();
3335
			this.render();
3336
		},
3337
		reflow : function(){
3338
			helpers.extend(this.SegmentArc.prototype,{
3339
				x : this.chart.width/2,
3340
				y : this.chart.height/2
3341
			});
3342
			this.updateScaleRange(this.segments);
3343
			this.scale.update();
3344
 
3345
			helpers.extend(this.scale,{
3346
				xCenter: this.chart.width/2,
3347
				yCenter: this.chart.height/2
3348
			});
3349
 
3350
			helpers.each(this.segments, function(segment){
3351
				segment.update({
3352
					outerRadius : this.scale.calculateCenterOffset(segment.value)
3353
				});
3354
			}, this);
3355
 
3356
		},
3357
		draw : function(ease){
3358
			var easingDecimal = ease || 1;
3359
			//Clear & draw the canvas
3360
			this.clear();
3361
			helpers.each(this.segments,function(segment, index){
3362
				segment.transition({
3363
					circumference : this.scale.getCircumference(),
3364
					outerRadius : this.scale.calculateCenterOffset(segment.value)
3365
				},easingDecimal);
3366
 
3367
				segment.endAngle = segment.startAngle + segment.circumference;
3368
 
3369
				// If we've removed the first segment we need to set the first one to
3370
				// start at the top.
3371
				if (index === 0){
3372
					segment.startAngle = Math.PI * 1.5;
3373
				}
3374
 
3375
				//Check to see if it's the last segment, if not get the next and update the start angle
3376
				if (index < this.segments.length - 1){
3377
					this.segments[index+1].startAngle = segment.endAngle;
3378
				}
3379
				segment.draw();
3380
			}, this);
3381
			this.scale.draw();
3382
		}
3383
	});
3384
 
3385
}).call(this);
3386
 
3387
(function(){
3388
	"use strict";
3389
 
3390
	var root = this,
3391
		Chart = root.Chart,
3392
		helpers = Chart.helpers;
3393
 
3394
 
3395
 
3396
	Chart.Type.extend({
3397
		name: "Radar",
3398
		defaults:{
3399
			//Boolean - Whether to show lines for each scale point
3400
			scaleShowLine : true,
3401
 
3402
			//Boolean - Whether we show the angle lines out of the radar
3403
			angleShowLineOut : true,
3404
 
3405
			//Boolean - Whether to show labels on the scale
3406
			scaleShowLabels : false,
3407
 
3408
			// Boolean - Whether the scale should begin at zero
3409
			scaleBeginAtZero : true,
3410
 
3411
			//String - Colour of the angle line
3412
			angleLineColor : "rgba(0,0,0,.1)",
3413
 
3414
			//Number - Pixel width of the angle line
3415
			angleLineWidth : 1,
3416
 
3417
			//Number - Interval at which to draw angle lines ("every Nth point")
3418
			angleLineInterval: 1,
3419
 
3420
			//String - Point label font declaration
3421
			pointLabelFontFamily : "'Arial'",
3422
 
3423
			//String - Point label font weight
3424
			pointLabelFontStyle : "normal",
3425
 
3426
			//Number - Point label font size in pixels
3427
			pointLabelFontSize : 10,
3428
 
3429
			//String - Point label font colour
3430
			pointLabelFontColor : "#666",
3431
 
3432
			//Boolean - Whether to show a dot for each point
3433
			pointDot : true,
3434
 
3435
			//Number - Radius of each point dot in pixels
3436
			pointDotRadius : 3,
3437
 
3438
			//Number - Pixel width of point dot stroke
3439
			pointDotStrokeWidth : 1,
3440
 
3441
			//Number - amount extra to add to the radius to cater for hit detection outside the drawn point
3442
			pointHitDetectionRadius : 20,
3443
 
3444
			//Boolean - Whether to show a stroke for datasets
3445
			datasetStroke : true,
3446
 
3447
			//Number - Pixel width of dataset stroke
3448
			datasetStrokeWidth : 2,
3449
 
3450
			//Boolean - Whether to fill the dataset with a colour
3451
			datasetFill : true,
3452
 
3453
			//String - A legend template
3454
			legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span class=\"<%=name.toLowerCase()%>-legend-icon\" style=\"background-color:<%=datasets[i].strokeColor%>\"></span><span class=\"<%=name.toLowerCase()%>-legend-text\"><%if(datasets[i].label){%><%=datasets[i].label%><%}%></span></li><%}%></ul>"
3455
 
3456
		},
3457
 
3458
		initialize: function(data){
3459
			this.PointClass = Chart.Point.extend({
3460
				strokeWidth : this.options.pointDotStrokeWidth,
3461
				radius : this.options.pointDotRadius,
3462
				display: this.options.pointDot,
3463
				hitDetectionRadius : this.options.pointHitDetectionRadius,
3464
				ctx : this.chart.ctx
3465
			});
3466
 
3467
			this.datasets = [];
3468
 
3469
			this.buildScale(data);
3470
 
3471
			//Set up tooltip events on the chart
3472
			if (this.options.showTooltips){
3473
				helpers.bindEvents(this, this.options.tooltipEvents, function(evt){
3474
					var activePointsCollection = (evt.type !== 'mouseout') ? this.getPointsAtEvent(evt) : [];
3475
 
3476
					this.eachPoints(function(point){
3477
						point.restore(['fillColor', 'strokeColor']);
3478
					});
3479
					helpers.each(activePointsCollection, function(activePoint){
3480
						activePoint.fillColor = activePoint.highlightFill;
3481
						activePoint.strokeColor = activePoint.highlightStroke;
3482
					});
3483
 
3484
					this.showTooltip(activePointsCollection);
3485
				});
3486
			}
3487
 
3488
			//Iterate through each of the datasets, and build this into a property of the chart
3489
			helpers.each(data.datasets,function(dataset){
3490
 
3491
				var datasetObject = {
3492
					label: dataset.label || null,
3493
					fillColor : dataset.fillColor,
3494
					strokeColor : dataset.strokeColor,
3495
					pointColor : dataset.pointColor,
3496
					pointStrokeColor : dataset.pointStrokeColor,
3497
					points : []
3498
				};
3499
 
3500
				this.datasets.push(datasetObject);
3501
 
3502
				helpers.each(dataset.data,function(dataPoint,index){
3503
					//Add a new point for each piece of data, passing any required data to draw.
3504
					var pointPosition;
3505
					if (!this.scale.animation){
3506
						pointPosition = this.scale.getPointPosition(index, this.scale.calculateCenterOffset(dataPoint));
3507
					}
3508
					datasetObject.points.push(new this.PointClass({
3509
						value : dataPoint,
3510
						label : data.labels[index],
3511
						datasetLabel: dataset.label,
3512
						x: (this.options.animation) ? this.scale.xCenter : pointPosition.x,
3513
						y: (this.options.animation) ? this.scale.yCenter : pointPosition.y,
3514
						strokeColor : dataset.pointStrokeColor,
3515
						fillColor : dataset.pointColor,
3516
						highlightFill : dataset.pointHighlightFill || dataset.pointColor,
3517
						highlightStroke : dataset.pointHighlightStroke || dataset.pointStrokeColor
3518
					}));
3519
				},this);
3520
 
3521
			},this);
3522
 
3523
			this.render();
3524
		},
3525
		eachPoints : function(callback){
3526
			helpers.each(this.datasets,function(dataset){
3527
				helpers.each(dataset.points,callback,this);
3528
			},this);
3529
		},
3530
 
3531
		getPointsAtEvent : function(evt){
3532
			var mousePosition = helpers.getRelativePosition(evt),
3533
				fromCenter = helpers.getAngleFromPoint({
3534
					x: this.scale.xCenter,
3535
					y: this.scale.yCenter
3536
				}, mousePosition);
3537
 
3538
			var anglePerIndex = (Math.PI * 2) /this.scale.valuesCount,
3539
				pointIndex = Math.round((fromCenter.angle - Math.PI * 1.5) / anglePerIndex),
3540
				activePointsCollection = [];
3541
 
3542
			// If we're at the top, make the pointIndex 0 to get the first of the array.
3543
			if (pointIndex >= this.scale.valuesCount || pointIndex < 0){
3544
				pointIndex = 0;
3545
			}
3546
 
3547
			if (fromCenter.distance <= this.scale.drawingArea){
3548
				helpers.each(this.datasets, function(dataset){
3549
					activePointsCollection.push(dataset.points[pointIndex]);
3550
				});
3551
			}
3552
 
3553
			return activePointsCollection;
3554
		},
3555
 
3556
		buildScale : function(data){
3557
			this.scale = new Chart.RadialScale({
3558
				display: this.options.showScale,
3559
				fontStyle: this.options.scaleFontStyle,
3560
				fontSize: this.options.scaleFontSize,
3561
				fontFamily: this.options.scaleFontFamily,
3562
				fontColor: this.options.scaleFontColor,
3563
				showLabels: this.options.scaleShowLabels,
3564
				showLabelBackdrop: this.options.scaleShowLabelBackdrop,
3565
				backdropColor: this.options.scaleBackdropColor,
3566
				backgroundColors: this.options.scaleBackgroundColors,
3567
				backdropPaddingY : this.options.scaleBackdropPaddingY,
3568
				backdropPaddingX: this.options.scaleBackdropPaddingX,
3569
				lineWidth: (this.options.scaleShowLine) ? this.options.scaleLineWidth : 0,
3570
				lineColor: this.options.scaleLineColor,
3571
				angleLineColor : this.options.angleLineColor,
3572
				angleLineWidth : (this.options.angleShowLineOut) ? this.options.angleLineWidth : 0,
3573
        angleLineInterval: (this.options.angleLineInterval) ? this.options.angleLineInterval : 1,
3574
				// Point labels at the edge of each line
3575
				pointLabelFontColor : this.options.pointLabelFontColor,
3576
				pointLabelFontSize : this.options.pointLabelFontSize,
3577
				pointLabelFontFamily : this.options.pointLabelFontFamily,
3578
				pointLabelFontStyle : this.options.pointLabelFontStyle,
3579
				height : this.chart.height,
3580
				width: this.chart.width,
3581
				xCenter: this.chart.width/2,
3582
				yCenter: this.chart.height/2,
3583
				ctx : this.chart.ctx,
3584
				templateString: this.options.scaleLabel,
3585
				labels: data.labels,
3586
				valuesCount: data.datasets[0].data.length
3587
			});
3588
 
3589
			this.scale.setScaleSize();
3590
			this.updateScaleRange(data.datasets);
3591
			this.scale.buildYLabels();
3592
		},
3593
		updateScaleRange: function(datasets){
3594
			var valuesArray = (function(){
3595
				var totalDataArray = [];
3596
				helpers.each(datasets,function(dataset){
3597
					if (dataset.data){
3598
						totalDataArray = totalDataArray.concat(dataset.data);
3599
					}
3600
					else {
3601
						helpers.each(dataset.points, function(point){
3602
							totalDataArray.push(point.value);
3603
						});
3604
					}
3605
				});
3606
				return totalDataArray;
3607
			})();
3608
 
3609
 
3610
			var scaleSizes = (this.options.scaleOverride) ?
3611
				{
3612
					steps: this.options.scaleSteps,
3613
					stepValue: this.options.scaleStepWidth,
3614
					min: this.options.scaleStartValue,
3615
					max: this.options.scaleStartValue + (this.options.scaleSteps * this.options.scaleStepWidth)
3616
				} :
3617
				helpers.calculateScaleRange(
3618
					valuesArray,
3619
					helpers.min([this.chart.width, this.chart.height])/2,
3620
					this.options.scaleFontSize,
3621
					this.options.scaleBeginAtZero,
3622
					this.options.scaleIntegersOnly
3623
				);
3624
 
3625
			helpers.extend(
3626
				this.scale,
3627
				scaleSizes
3628
			);
3629
 
3630
		},
3631
		addData : function(valuesArray,label){
3632
			//Map the values array for each of the datasets
3633
			this.scale.valuesCount++;
3634
			helpers.each(valuesArray,function(value,datasetIndex){
3635
				var pointPosition = this.scale.getPointPosition(this.scale.valuesCount, this.scale.calculateCenterOffset(value));
3636
				this.datasets[datasetIndex].points.push(new this.PointClass({
3637
					value : value,
3638
					label : label,
3639
					datasetLabel: this.datasets[datasetIndex].label,
3640
					x: pointPosition.x,
3641
					y: pointPosition.y,
3642
					strokeColor : this.datasets[datasetIndex].pointStrokeColor,
3643
					fillColor : this.datasets[datasetIndex].pointColor
3644
				}));
3645
			},this);
3646
 
3647
			this.scale.labels.push(label);
3648
 
3649
			this.reflow();
3650
 
3651
			this.update();
3652
		},
3653
		removeData : function(){
3654
			this.scale.valuesCount--;
3655
			this.scale.labels.shift();
3656
			helpers.each(this.datasets,function(dataset){
3657
				dataset.points.shift();
3658
			},this);
3659
			this.reflow();
3660
			this.update();
3661
		},
3662
		update : function(){
3663
			this.eachPoints(function(point){
3664
				point.save();
3665
			});
3666
			this.reflow();
3667
			this.render();
3668
		},
3669
		reflow: function(){
3670
			helpers.extend(this.scale, {
3671
				width : this.chart.width,
3672
				height: this.chart.height,
3673
				size : helpers.min([this.chart.width, this.chart.height]),
3674
				xCenter: this.chart.width/2,
3675
				yCenter: this.chart.height/2
3676
			});
3677
			this.updateScaleRange(this.datasets);
3678
			this.scale.setScaleSize();
3679
			this.scale.buildYLabels();
3680
		},
3681
		draw : function(ease){
3682
			var easeDecimal = ease || 1,
3683
				ctx = this.chart.ctx;
3684
			this.clear();
3685
			this.scale.draw();
3686
 
3687
			helpers.each(this.datasets,function(dataset){
3688
 
3689
				//Transition each point first so that the line and point drawing isn't out of sync
3690
				helpers.each(dataset.points,function(point,index){
3691
					if (point.hasValue()){
3692
						point.transition(this.scale.getPointPosition(index, this.scale.calculateCenterOffset(point.value)), easeDecimal);
3693
					}
3694
				},this);
3695
 
3696
 
3697
 
3698
				//Draw the line between all the points
3699
				ctx.lineWidth = this.options.datasetStrokeWidth;
3700
				ctx.strokeStyle = dataset.strokeColor;
3701
				ctx.beginPath();
3702
				helpers.each(dataset.points,function(point,index){
3703
					if (index === 0){
3704
						ctx.moveTo(point.x,point.y);
3705
					}
3706
					else{
3707
						ctx.lineTo(point.x,point.y);
3708
					}
3709
				},this);
3710
				ctx.closePath();
3711
				ctx.stroke();
3712
 
3713
				ctx.fillStyle = dataset.fillColor;
3714
				if(this.options.datasetFill){
3715
					ctx.fill();
3716
				}
3717
				//Now draw the points over the line
3718
				//A little inefficient double looping, but better than the line
3719
				//lagging behind the point positions
3720
				helpers.each(dataset.points,function(point){
3721
					if (point.hasValue()){
3722
						point.draw();
3723
					}
3724
				});
3725
 
3726
			},this);
3727
 
3728
		}
3729
 
3730
	});
3731
 
3732
 
3733
 
3734
 
3735
 
3736
}).call(this);