markadrake · June 5, 2015 17:28
diff --git a/index.html b/index.html
 <!doctype html>
 <html>
 	<head>
 		<title>Doughnut Chart</title>
 	
 		<style>
 			body{
 				padding: 0;
 				margin: 0;
 			}
 			#canvas-holder{
 				width:30%;
 			}
 		</style>
 	</head>
 	<body>
 		<div id="canvas-holder">
 			<canvas id="chart-area" width="500" height="500"/>
 		</div>


 	<script>

 		var doughnutData = [
 				{
 					value: 300,
 					color:"#F7464A",
 					highlight: "#FF5A5E",
 					label: "Red"
 				},
 				{
 					value: 50,
 					color: "#46BFBD",
 					highlight: "#5AD3D1",
 					label: "Green"
 				},
 				{
 					value: 100,
 					color: "#FDB45C",
 					highlight: "#FFC870",
 					label: "Yellow"
 				},
 				{
 					value: 40,
 					color: "#949FB1",
 					highlight: "#A8B3C5",
 					label: "Grey"
 				},
 				{
 					value: 120,
 					color: "#4D5360",
 					highlight: "#616774",
 					label: "Dark Grey"
 				}

 			];

 			window.onload = function(){
 				var ctx = document.getElementById("chart-area").getContext("2d");
 				window.myDoughnut = new Chart(ctx).Doughnut(doughnutData, {responsive : true, rotation: 90});
 			};



 	</script>
 	</body>
 </html>
diff --git a/Rotate a Doughnut Chart (Chart.JS).markdown b/Rotate a Doughnut Chart (Chart.JS).markdown
diff --git a/script.js b/script.js
 /*!
 * Chart.js
 * http://chartjs.org/
 * Version: 1.0.2
 *
 * Copyright 2015 Nick Downie
 * Released under the MIT license
 * https://github.com/nnnick/Chart.js/blob/master/LICENSE.md
 */


 (function(){

 	"use strict";

 	//Declare root variable - window in the browser, global on the server
 	var root = this,
 		previous = root.Chart;

 	//Occupy the global variable of Chart, and create a simple base class
 	var Chart = function(context){
 		var chart = this;
 		this.canvas = context.canvas;

 		this.ctx = context;

 		//Variables global to the chart
 		var computeDimension = function(element,dimension)
 		{
 			if (element['offset'+dimension])
 			{
 				return element['offset'+dimension];
 			}
 			else
 			{
 				return document.defaultView.getComputedStyle(element).getPropertyValue(dimension);
 			}
 		}

 		var width = this.width = computeDimension(context.canvas,'Width');
 		var height = this.height = computeDimension(context.canvas,'Height');

 		// Firefox requires this to work correctly
 		context.canvas.width  = width;
 		context.canvas.height = height;

 		var width = this.width = context.canvas.width;
 		var height = this.height = context.canvas.height;
 		this.aspectRatio = this.width / this.height;
 		//High pixel density displays - multiply the size of the canvas height/width by the device pixel ratio, then scale.
 		helpers.retinaScale(this);

 		return this;
 	};
 	//Globally expose the defaults to allow for user updating/changing
 	Chart.defaults = {
 		global: {
 			// Boolean - Whether to animate the chart
 			animation: true,

 			// Number - Number of animation steps
 			animationSteps: 60,

 			// String - Animation easing effect
 			animationEasing: "easeOutQuart",

 			// Boolean - If we should show the scale at all
 			showScale: true,

 			// Boolean - If we want to override with a hard coded scale
 			scaleOverride: false,

 			// ** Required if scaleOverride is true **
 			// Number - The number of steps in a hard coded scale
 			scaleSteps: null,
 			// Number - The value jump in the hard coded scale
 			scaleStepWidth: null,
 			// Number - The scale starting value
 			scaleStartValue: null,

 			// String - Colour of the scale line
 			scaleLineColor: "rgba(0,0,0,.1)",

 			// Number - Pixel width of the scale line
 			scaleLineWidth: 1,

 			// Boolean - Whether to show labels on the scale
 			scaleShowLabels: true,

 			// Interpolated JS string - can access value
 			scaleLabel: "<%=value%>",

 			// Boolean - Whether the scale should stick to integers, and not show any floats even if drawing space is there
 			scaleIntegersOnly: true,

 			// Boolean - Whether the scale should start at zero, or an order of magnitude down from the lowest value
 			scaleBeginAtZero: false,

 			// String - Scale label font declaration for the scale label
 			scaleFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",

 			// Number - Scale label font size in pixels
 			scaleFontSize: 12,

 			// String - Scale label font weight style
 			scaleFontStyle: "normal",

 			// String - Scale label font colour
 			scaleFontColor: "#666",

 			// Boolean - whether or not the chart should be responsive and resize when the browser does.
 			responsive: false,

 			// Boolean - whether to maintain the starting aspect ratio or not when responsive, if set to false, will take up entire container
 			maintainAspectRatio: true,

 			// Boolean - Determines whether to draw tooltips on the canvas or not - attaches events to touchmove & mousemove
 			showTooltips: true,

 			// Boolean - Determines whether to draw built-in tooltip or call custom tooltip function
 			customTooltips: false,

 			// Array - Array of string names to attach tooltip events
 			tooltipEvents: ["mousemove", "touchstart", "touchmove", "mouseout"],

 			// String - Tooltip background colour
 			tooltipFillColor: "rgba(0,0,0,0.8)",

 			// String - Tooltip label font declaration for the scale label
 			tooltipFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",

 			// Number - Tooltip label font size in pixels
 			tooltipFontSize: 14,

 			// String - Tooltip font weight style
 			tooltipFontStyle: "normal",

 			// String - Tooltip label font colour
 			tooltipFontColor: "#fff",

 			// String - Tooltip title font declaration for the scale label
 			tooltipTitleFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",

 			// Number - Tooltip title font size in pixels
 			tooltipTitleFontSize: 14,

 			// String - Tooltip title font weight style
 			tooltipTitleFontStyle: "bold",

 			// String - Tooltip title font colour
 			tooltipTitleFontColor: "#fff",

 			// Number - pixel width of padding around tooltip text
 			tooltipYPadding: 6,

 			// Number - pixel width of padding around tooltip text
 			tooltipXPadding: 6,

 			// Number - Size of the caret on the tooltip
 			tooltipCaretSize: 8,

 			// Number - Pixel radius of the tooltip border
 			tooltipCornerRadius: 6,

 			// Number - Pixel offset from point x to tooltip edge
 			tooltipXOffset: 10,

 			// String - Template string for single tooltips
 			tooltipTemplate: "<%if (label){%><%=label%>: <%}%><%= value %>",

 			// String - Template string for single tooltips
 			multiTooltipTemplate: "<%= value %>",

 			// String - Colour behind the legend colour block
 			multiTooltipKeyBackground: '#fff',

 			// Function - Will fire on animation progression.
 			onAnimationProgress: function(){},

 			// Function - Will fire on animation completion.
 			onAnimationComplete: function(){}

 		}
 	};

 	//Create a dictionary of chart types, to allow for extension of existing types
 	Chart.types = {};

 	//Global Chart helpers object for utility methods and classes
 	var helpers = Chart.helpers = {};

 		//-- Basic js utility methods
 	var each = helpers.each = function(loopable,callback,self){
 			var additionalArgs = Array.prototype.slice.call(arguments, 3);
 			// Check to see if null or undefined firstly.
 			if (loopable){
 				if (loopable.length === +loopable.length){
 					var i;
 					for (i=0; i<loopable.length; i++){
 						callback.apply(self,[loopable[i], i].concat(additionalArgs));
 					}
 				}
 				else{
 					for (var item in loopable){
 						callback.apply(self,[loopable[item],item].concat(additionalArgs));
 					}
 				}
 			}
 		},
 		clone = helpers.clone = function(obj){
 			var objClone = {};
 			each(obj,function(value,key){
 				if (obj.hasOwnProperty(key)) objClone[key] = value;
 			});
 			return objClone;
 		},
 		extend = helpers.extend = function(base){
 			each(Array.prototype.slice.call(arguments,1), function(extensionObject) {
 				each(extensionObject,function(value,key){
 					if (extensionObject.hasOwnProperty(key)) base[key] = value;
 				});
 			});
 			return base;
 		},
 		merge = helpers.merge = function(base,master){
 			//Merge properties in left object over to a shallow clone of object right.
 			var args = Array.prototype.slice.call(arguments,0);
 			args.unshift({});
 			return extend.apply(null, args);
 		},
 		indexOf = helpers.indexOf = function(arrayToSearch, item){
 			if (Array.prototype.indexOf) {
 				return arrayToSearch.indexOf(item);
 			}
 			else{
 				for (var i = 0; i < arrayToSearch.length; i++) {
 					if (arrayToSearch[i] === item) return i;
 				}
 				return -1;
 			}
 		},
 		where = helpers.where = function(collection, filterCallback){
 			var filtered = [];

 			helpers.each(collection, function(item){
 				if (filterCallback(item)){
 					filtered.push(item);
 				}
 			});

 			return filtered;
 		},
 		findNextWhere = helpers.findNextWhere = function(arrayToSearch, filterCallback, startIndex){
 			// Default to start of the array
 			if (!startIndex){
 				startIndex = -1;
 			}
 			for (var i = startIndex + 1; i < arrayToSearch.length; i++) {
 				var currentItem = arrayToSearch[i];
 				if (filterCallback(currentItem)){
 					return currentItem;
 				}
 			}
 		},
 		findPreviousWhere = helpers.findPreviousWhere = function(arrayToSearch, filterCallback, startIndex){
 			// Default to end of the array
 			if (!startIndex){
 				startIndex = arrayToSearch.length;
 			}
 			for (var i = startIndex - 1; i >= 0; i--) {
 				var currentItem = arrayToSearch[i];
 				if (filterCallback(currentItem)){
 					return currentItem;
 				}
 			}
 		},
 		inherits = helpers.inherits = function(extensions){
 			//Basic javascript inheritance based on the model created in Backbone.js
 			var parent = this;
 			var ChartElement = (extensions && extensions.hasOwnProperty("constructor")) ? extensions.constructor : function(){ return parent.apply(this, arguments); };

 			var Surrogate = function(){ this.constructor = ChartElement;};
 			Surrogate.prototype = parent.prototype;
 			ChartElement.prototype = new Surrogate();

 			ChartElement.extend = inherits;

 			if (extensions) extend(ChartElement.prototype, extensions);

 			ChartElement.__super__ = parent.prototype;

 			return ChartElement;
 		},
 		noop = helpers.noop = function(){},
 		uid = helpers.uid = (function(){
 			var id=0;
 			return function(){
 				return "chart-" + id++;
 			};
 		})(),
 		warn = helpers.warn = function(str){
 			//Method for warning of errors
 			if (window.console && typeof window.console.warn == "function") console.warn(str);
 		},
 		amd = helpers.amd = (typeof define == 'function' && define.amd),
 		//-- Math methods
 		isNumber = helpers.isNumber = function(n){
 			return !isNaN(parseFloat(n)) && isFinite(n);
 		},
 		max = helpers.max = function(array){
 			return Math.max.apply( Math, array );
 		},
 		min = helpers.min = function(array){
 			return Math.min.apply( Math, array );
 		},
 		cap = helpers.cap = function(valueToCap,maxValue,minValue){
 			if(isNumber(maxValue)) {
 				if( valueToCap > maxValue ) {
 					return maxValue;
 				}
 			}
 			else if(isNumber(minValue)){
 				if ( valueToCap < minValue ){
 					return minValue;
 				}
 			}
 			return valueToCap;
 		},
 		getDecimalPlaces = helpers.getDecimalPlaces = function(num){
 			if (num%1!==0 && isNumber(num)){
 				return num.toString().split(".")[1].length;
 			}
 			else {
 				return 0;
 			}
 		},
 		toRadians = helpers.radians = function(degrees){
 			return degrees * (Math.PI/180);
 		},
 		// Gets the angle from vertical upright to the point about a centre.
 		getAngleFromPoint = helpers.getAngleFromPoint = function(centrePoint, anglePoint){
 			var distanceFromXCenter = anglePoint.x - centrePoint.x,
 				distanceFromYCenter = anglePoint.y - centrePoint.y,
 				radialDistanceFromCenter = Math.sqrt( distanceFromXCenter * distanceFromXCenter + distanceFromYCenter * distanceFromYCenter);


 			var angle = Math.PI * 2 + Math.atan2(distanceFromYCenter, distanceFromXCenter);

 			//If the segment is in the top left quadrant, we need to add another rotation to the angle
 			if (distanceFromXCenter < 0 && distanceFromYCenter < 0){
 				angle += Math.PI*2;
 			}

 			return {
 				angle: angle,
 				distance: radialDistanceFromCenter
 			};
 		},
 		aliasPixel = helpers.aliasPixel = function(pixelWidth){
 			return (pixelWidth % 2 === 0) ? 0 : 0.5;
 		},
 		splineCurve = helpers.splineCurve = function(FirstPoint,MiddlePoint,AfterPoint,t){
 			//Props to Rob Spencer at scaled innovation for his post on splining between points
 			//http://scaledinnovation.com/analytics/splines/aboutSplines.html
 			var d01=Math.sqrt(Math.pow(MiddlePoint.x-FirstPoint.x,2)+Math.pow(MiddlePoint.y-FirstPoint.y,2)),
 				d12=Math.sqrt(Math.pow(AfterPoint.x-MiddlePoint.x,2)+Math.pow(AfterPoint.y-MiddlePoint.y,2)),
 				fa=t*d01/(d01+d12),// scaling factor for triangle Ta
 				fb=t*d12/(d01+d12);
 			return {
 				inner : {
 					x : MiddlePoint.x-fa*(AfterPoint.x-FirstPoint.x),
 					y : MiddlePoint.y-fa*(AfterPoint.y-FirstPoint.y)
 				},
 				outer : {
 					x: MiddlePoint.x+fb*(AfterPoint.x-FirstPoint.x),
 					y : MiddlePoint.y+fb*(AfterPoint.y-FirstPoint.y)
 				}
 			};
 		},
 		calculateOrderOfMagnitude = helpers.calculateOrderOfMagnitude = function(val){
 			return Math.floor(Math.log(val) / Math.LN10);
 		},
 		calculateScaleRange = helpers.calculateScaleRange = function(valuesArray, drawingSize, textSize, startFromZero, integersOnly){

 			//Set a minimum step of two - a point at the top of the graph, and a point at the base
 			var minSteps = 2,
 				maxSteps = Math.floor(drawingSize/(textSize * 1.5)),
 				skipFitting = (minSteps >= maxSteps);

 			var maxValue = max(valuesArray),
 				minValue = min(valuesArray);

 			// We need some degree of seperation here to calculate the scales if all the values are the same
 			// Adding/minusing 0.5 will give us a range of 1.
 			if (maxValue === minValue){
 				maxValue += 0.5;
 				// So we don't end up with a graph with a negative start value if we've said always start from zero
 				if (minValue >= 0.5 && !startFromZero){
 					minValue -= 0.5;
 				}
 				else{
 					// Make up a whole number above the values
 					maxValue += 0.5;
 				}
 			}

 			var	valueRange = Math.abs(maxValue - minValue),
 				rangeOrderOfMagnitude = calculateOrderOfMagnitude(valueRange),
 				graphMax = Math.ceil(maxValue / (1 * Math.pow(10, rangeOrderOfMagnitude))) * Math.pow(10, rangeOrderOfMagnitude),
 				graphMin = (startFromZero) ? 0 : Math.floor(minValue / (1 * Math.pow(10, rangeOrderOfMagnitude))) * Math.pow(10, rangeOrderOfMagnitude),
 				graphRange = graphMax - graphMin,
 				stepValue = Math.pow(10, rangeOrderOfMagnitude),
 				numberOfSteps = Math.round(graphRange / stepValue);

 			//If we have more space on the graph we'll use it to give more definition to the data
 			while((numberOfSteps > maxSteps || (numberOfSteps * 2) < maxSteps) && !skipFitting) {
 				if(numberOfSteps > maxSteps){
 					stepValue *=2;
 					numberOfSteps = Math.round(graphRange/stepValue);
 					// Don't ever deal with a decimal number of steps - cancel fitting and just use the minimum number of steps.
 					if (numberOfSteps % 1 !== 0){
 						skipFitting = true;
 					}
 				}
 				//We can fit in double the amount of scale points on the scale
 				else{
 					//If user has declared ints only, and the step value isn't a decimal
 					if (integersOnly && rangeOrderOfMagnitude >= 0){
 						//If the user has said integers only, we need to check that making the scale more granular wouldn't make it a float
 						if(stepValue/2 % 1 === 0){
 							stepValue /=2;
 							numberOfSteps = Math.round(graphRange/stepValue);
 						}
 						//If it would make it a float break out of the loop
 						else{
 							break;
 						}
 					}
 					//If the scale doesn't have to be an int, make the scale more granular anyway.
 					else{
 						stepValue /=2;
 						numberOfSteps = Math.round(graphRange/stepValue);
 					}

 				}
 			}

 			if (skipFitting){
 				numberOfSteps = minSteps;
 				stepValue = graphRange / numberOfSteps;
 			}

 			return {
 				steps : numberOfSteps,
 				stepValue : stepValue,
 				min : graphMin,
 				max	: graphMin + (numberOfSteps * stepValue)
 			};

 		},
 		/* jshint ignore:start */
 		// Blows up jshint errors based on the new Function constructor
 		//Templating methods
 		//Javascript micro templating by John Resig - source at http://ejohn.org/blog/javascript-micro-templating/
 		template = helpers.template = function(templateString, valuesObject){

 			// If templateString is function rather than string-template - call the function for valuesObject

 			if(templateString instanceof Function){
 			 	return templateString(valuesObject);
 		 	}

 			var cache = {};
 			function tmpl(str, data){
 				// Figure out if we're getting a template, or if we need to
 				// load the template - and be sure to cache the result.
 				var fn = !/\W/.test(str) ?
 				cache[str] = cache[str] :

 				// Generate a reusable function that will serve as a template
 				// generator (and which will be cached).
 				new Function("obj",
 					"var p=[],print=function(){p.push.apply(p,arguments);};" +

 					// Introduce the data as local variables using with(){}
 					"with(obj){p.push('" +

 					// Convert the template into pure JavaScript
 					str
 						.replace(/[\r\t\n]/g, " ")
 						.split("<%").join("\t")
 						.replace(/((^|%>)[^\t]*)'/g, "$1\r")
 						.replace(/\t=(.*?)%>/g, "',$1,'")
 						.split("\t").join("');")
 						.split("%>").join("p.push('")
 						.split("\r").join("\\'") +
 					"');}return p.join('');"
 				);

 				// Provide some basic currying to the user
 				return data ? fn( data ) : fn;
 			}
 			return tmpl(templateString,valuesObject);
 		},
 		/* jshint ignore:end */
 		generateLabels = helpers.generateLabels = function(templateString,numberOfSteps,graphMin,stepValue){
 			var labelsArray = new Array(numberOfSteps);
 			if (labelTemplateString){
 				each(labelsArray,function(val,index){
 					labelsArray[index] = template(templateString,{value: (graphMin + (stepValue*(index+1)))});
 				});
 			}
 			return labelsArray;
 		},
 		//--Animation methods
 		//Easing functions adapted from Robert Penner's easing equations
 		//http://www.robertpenner.com/easing/
 		easingEffects = helpers.easingEffects = {
 			linear: function (t) {
 				return t;
 			},
 			easeInQuad: function (t) {
 				return t * t;
 			},
 			easeOutQuad: function (t) {
 				return -1 * t * (t - 2);
 			},
 			easeInOutQuad: function (t) {
 				if ((t /= 1 / 2) < 1) return 1 / 2 * t * t;
 				return -1 / 2 * ((--t) * (t - 2) - 1);
 			},
 			easeInCubic: function (t) {
 				return t * t * t;
 			},
 			easeOutCubic: function (t) {
 				return 1 * ((t = t / 1 - 1) * t * t + 1);
 			},
 			easeInOutCubic: function (t) {
 				if ((t /= 1 / 2) < 1) return 1 / 2 * t * t * t;
 				return 1 / 2 * ((t -= 2) * t * t + 2);
 			},
 			easeInQuart: function (t) {
 				return t * t * t * t;
 			},
 			easeOutQuart: function (t) {
 				return -1 * ((t = t / 1 - 1) * t * t * t - 1);
 			},
 			easeInOutQuart: function (t) {
 				if ((t /= 1 / 2) < 1) return 1 / 2 * t * t * t * t;
 				return -1 / 2 * ((t -= 2) * t * t * t - 2);
 			},
 			easeInQuint: function (t) {
 				return 1 * (t /= 1) * t * t * t * t;
 			},
 			easeOutQuint: function (t) {
 				return 1 * ((t = t / 1 - 1) * t * t * t * t + 1);
 			},
 			easeInOutQuint: function (t) {
 				if ((t /= 1 / 2) < 1) return 1 / 2 * t * t * t * t * t;
 				return 1 / 2 * ((t -= 2) * t * t * t * t + 2);
 			},
 			easeInSine: function (t) {
 				return -1 * Math.cos(t / 1 * (Math.PI / 2)) + 1;
 			},
 			easeOutSine: function (t) {
 				return 1 * Math.sin(t / 1 * (Math.PI / 2));
 			},
 			easeInOutSine: function (t) {
 				return -1 / 2 * (Math.cos(Math.PI * t / 1) - 1);
 			},
 			easeInExpo: function (t) {
 				return (t === 0) ? 1 : 1 * Math.pow(2, 10 * (t / 1 - 1));
 			},
 			easeOutExpo: function (t) {
 				return (t === 1) ? 1 : 1 * (-Math.pow(2, -10 * t / 1) + 1);
 			},
 			easeInOutExpo: function (t) {
 				if (t === 0) return 0;
 				if (t === 1) return 1;
 				if ((t /= 1 / 2) < 1) return 1 / 2 * Math.pow(2, 10 * (t - 1));
 				return 1 / 2 * (-Math.pow(2, -10 * --t) + 2);
 			},
 			easeInCirc: function (t) {
 				if (t >= 1) return t;
 				return -1 * (Math.sqrt(1 - (t /= 1) * t) - 1);
 			},
 			easeOutCirc: function (t) {
 				return 1 * Math.sqrt(1 - (t = t / 1 - 1) * t);
 			},
 			easeInOutCirc: function (t) {
 				if ((t /= 1 / 2) < 1) return -1 / 2 * (Math.sqrt(1 - t * t) - 1);
 				return 1 / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1);
 			},
 			easeInElastic: function (t) {
 				var s = 1.70158;
 				var p = 0;
 				var a = 1;
 				if (t === 0) return 0;
 				if ((t /= 1) == 1) return 1;
 				if (!p) p = 1 * 0.3;
 				if (a < Math.abs(1)) {
 					a = 1;
 					s = p / 4;
 				} else s = p / (2 * Math.PI) * Math.asin(1 / a);
 				return -(a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p));
 			},
 			easeOutElastic: function (t) {
 				var s = 1.70158;
 				var p = 0;
 				var a = 1;
 				if (t === 0) return 0;
 				if ((t /= 1) == 1) return 1;
 				if (!p) p = 1 * 0.3;
 				if (a < Math.abs(1)) {
 					a = 1;
 					s = p / 4;
 				} else s = p / (2 * Math.PI) * Math.asin(1 / a);
 				return a * Math.pow(2, -10 * t) * Math.sin((t * 1 - s) * (2 * Math.PI) / p) + 1;
 			},
 			easeInOutElastic: function (t) {
 				var s = 1.70158;
 				var p = 0;
 				var a = 1;
 				if (t === 0) return 0;
 				if ((t /= 1 / 2) == 2) return 1;
 				if (!p) p = 1 * (0.3 * 1.5);
 				if (a < Math.abs(1)) {
 					a = 1;
 					s = p / 4;
 				} else s = p / (2 * Math.PI) * Math.asin(1 / a);
 				if (t < 1) return -0.5 * (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p));
 				return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p) * 0.5 + 1;
 			},
 			easeInBack: function (t) {
 				var s = 1.70158;
 				return 1 * (t /= 1) * t * ((s + 1) * t - s);
 			},
 			easeOutBack: function (t) {
 				var s = 1.70158;
 				return 1 * ((t = t / 1 - 1) * t * ((s + 1) * t + s) + 1);
 			},
 			easeInOutBack: function (t) {
 				var s = 1.70158;
 				if ((t /= 1 / 2) < 1) return 1 / 2 * (t * t * (((s *= (1.525)) + 1) * t - s));
 				return 1 / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2);
 			},
 			easeInBounce: function (t) {
 				return 1 - easingEffects.easeOutBounce(1 - t);
 			},
 			easeOutBounce: function (t) {
 				if ((t /= 1) < (1 / 2.75)) {
 					return 1 * (7.5625 * t * t);
 				} else if (t < (2 / 2.75)) {
 					return 1 * (7.5625 * (t -= (1.5 / 2.75)) * t + 0.75);
 				} else if (t < (2.5 / 2.75)) {
 					return 1 * (7.5625 * (t -= (2.25 / 2.75)) * t + 0.9375);
 				} else {
 					return 1 * (7.5625 * (t -= (2.625 / 2.75)) * t + 0.984375);
 				}
 			},
 			easeInOutBounce: function (t) {
 				if (t < 1 / 2) return easingEffects.easeInBounce(t * 2) * 0.5;
 				return easingEffects.easeOutBounce(t * 2 - 1) * 0.5 + 1 * 0.5;
 			}
 		},
 		//Request animation polyfill - http://www.paulirish.com/2011/requestanimationframe-for-smart-animating/
 		requestAnimFrame = helpers.requestAnimFrame = (function(){
 			return window.requestAnimationFrame ||
 				window.webkitRequestAnimationFrame ||
 				window.mozRequestAnimationFrame ||
 				window.oRequestAnimationFrame ||
 				window.msRequestAnimationFrame ||
 				function(callback) {
 					return window.setTimeout(callback, 1000 / 60);
 				};
 		})(),
 		cancelAnimFrame = helpers.cancelAnimFrame = (function(){
 			return window.cancelAnimationFrame ||
 				window.webkitCancelAnimationFrame ||
 				window.mozCancelAnimationFrame ||
 				window.oCancelAnimationFrame ||
 				window.msCancelAnimationFrame ||
 				function(callback) {
 					return window.clearTimeout(callback, 1000 / 60);
 				};
 		})(),
 		animationLoop = helpers.animationLoop = function(callback,totalSteps,easingString,onProgress,onComplete,chartInstance){

 			var currentStep = 0,
 				easingFunction = easingEffects[easingString] || easingEffects.linear;

 			var animationFrame = function(){
 				currentStep++;
 				var stepDecimal = currentStep/totalSteps;
 				var easeDecimal = easingFunction(stepDecimal);

 				callback.call(chartInstance,easeDecimal,stepDecimal, currentStep);
 				onProgress.call(chartInstance,easeDecimal,stepDecimal);
 				if (currentStep < totalSteps){
 					chartInstance.animationFrame = requestAnimFrame(animationFrame);
 				} else{
 					onComplete.apply(chartInstance);
 				}
 			};
 			requestAnimFrame(animationFrame);
 		},
 		//-- DOM methods
 		getRelativePosition = helpers.getRelativePosition = function(evt){
 			var mouseX, mouseY;
 			var e = evt.originalEvent || evt,
 				canvas = evt.currentTarget || evt.srcElement,
 				boundingRect = canvas.getBoundingClientRect();

 			if (e.touches){
 				mouseX = e.touches[0].clientX - boundingRect.left;
 				mouseY = e.touches[0].clientY - boundingRect.top;

 			}
 			else{
 				mouseX = e.clientX - boundingRect.left;
 				mouseY = e.clientY - boundingRect.top;
 			}

 			return {
 				x : mouseX,
 				y : mouseY
 			};

 		},
 		addEvent = helpers.addEvent = function(node,eventType,method){
 			if (node.addEventListener){
 				node.addEventListener(eventType,method);
 			} else if (node.attachEvent){
 				node.attachEvent("on"+eventType, method);
 			} else {
 				node["on"+eventType] = method;
 			}
 		},
 		removeEvent = helpers.removeEvent = function(node, eventType, handler){
 			if (node.removeEventListener){
 				node.removeEventListener(eventType, handler, false);
 			} else if (node.detachEvent){
 				node.detachEvent("on"+eventType,handler);
 			} else{
 				node["on" + eventType] = noop;
 			}
 		},
 		bindEvents = helpers.bindEvents = function(chartInstance, arrayOfEvents, handler){
 			// Create the events object if it's not already present
 			if (!chartInstance.events) chartInstance.events = {};

 			each(arrayOfEvents,function(eventName){
 				chartInstance.events[eventName] = function(){
 					handler.apply(chartInstance, arguments);
 				};
 				addEvent(chartInstance.chart.canvas,eventName,chartInstance.events[eventName]);
 			});
 		},
 		unbindEvents = helpers.unbindEvents = function (chartInstance, arrayOfEvents) {
 			each(arrayOfEvents, function(handler,eventName){
 				removeEvent(chartInstance.chart.canvas, eventName, handler);
 			});
 		},
 		getMaximumWidth = helpers.getMaximumWidth = function(domNode){
 			var container = domNode.parentNode;
 			// TODO = check cross browser stuff with this.
 			return container.clientWidth;
 		},
 		getMaximumHeight = helpers.getMaximumHeight = function(domNode){
 			var container = domNode.parentNode;
 			// TODO = check cross browser stuff with this.
 			return container.clientHeight;
 		},
 		getMaximumSize = helpers.getMaximumSize = helpers.getMaximumWidth, // legacy support
 		retinaScale = helpers.retinaScale = function(chart){
 			var ctx = chart.ctx,
 				width = chart.canvas.width,
 				height = chart.canvas.height;

 			if (window.devicePixelRatio) {
 				ctx.canvas.style.width = width + "px";
 				ctx.canvas.style.height = height + "px";
 				ctx.canvas.height = height * window.devicePixelRatio;
 				ctx.canvas.width = width * window.devicePixelRatio;
 				ctx.scale(window.devicePixelRatio, window.devicePixelRatio);
 			}
 		},
 		//-- Canvas methods
 		clear = helpers.clear = function(chart){
 			chart.ctx.clearRect(0,0,chart.width,chart.height);
 		},
 		fontString = helpers.fontString = function(pixelSize,fontStyle,fontFamily){
 			return fontStyle + " " + pixelSize+"px " + fontFamily;
 		},
 		longestText = helpers.longestText = function(ctx,font,arrayOfStrings){
 			ctx.font = font;
 			var longest = 0;
 			each(arrayOfStrings,function(string){
 				var textWidth = ctx.measureText(string).width;
 				longest = (textWidth > longest) ? textWidth : longest;
 			});
 			return longest;
 		},
 		drawRoundedRectangle = helpers.drawRoundedRectangle = function(ctx,x,y,width,height,radius){
 			ctx.beginPath();
 			ctx.moveTo(x + radius, y);
 			ctx.lineTo(x + width - radius, y);
 			ctx.quadraticCurveTo(x + width, y, x + width, y + radius);
 			ctx.lineTo(x + width, y + height - radius);
 			ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);
 			ctx.lineTo(x + radius, y + height);
 			ctx.quadraticCurveTo(x, y + height, x, y + height - radius);
 			ctx.lineTo(x, y + radius);
 			ctx.quadraticCurveTo(x, y, x + radius, y);
 			ctx.closePath();
 		};


 	//Store a reference to each instance - allowing us to globally resize chart instances on window resize.
 	//Destroy method on the chart will remove the instance of the chart from this reference.
 	Chart.instances = {};

 	Chart.Type = function(data,options,chart){
 		this.options = options;
 		this.chart = chart;
 		this.id = uid();
 		//Add the chart instance to the global namespace
 		Chart.instances[this.id] = this;

 		// Initialize is always called when a chart type is created
 		// By default it is a no op, but it should be extended
 		if (options.responsive){
 			this.resize();
 		}
 		this.initialize.call(this,data);
 	};

 	//Core methods that'll be a part of every chart type
 	extend(Chart.Type.prototype,{
 		initialize : function(){return this;},
 		clear : function(){
 			clear(this.chart);
 			return this;
 		},
 		stop : function(){
 			// Stops any current animation loop occuring
 			cancelAnimFrame(this.animationFrame);
 			return this;
 		},
 		resize : function(callback){
 			this.stop();
 			var canvas = this.chart.canvas,
 				newWidth = getMaximumWidth(this.chart.canvas),
 				newHeight = this.options.maintainAspectRatio ? newWidth / this.chart.aspectRatio : getMaximumHeight(this.chart.canvas);

 			canvas.width = this.chart.width = newWidth;
 			canvas.height = this.chart.height = newHeight;

 			retinaScale(this.chart);

 			if (typeof callback === "function"){
 				callback.apply(this, Array.prototype.slice.call(arguments, 1));
 			}
 			return this;
 		},
 		reflow : noop,
 		render : function(reflow){
 			if (reflow){
 				this.reflow();
 			}
 			if (this.options.animation && !reflow){
 				helpers.animationLoop(
 					this.draw,
 					this.options.animationSteps,
 					this.options.animationEasing,
 					this.options.onAnimationProgress,
 					this.options.onAnimationComplete,
 					this
 				);
 			}
 			else{
 				this.draw();
 				this.options.onAnimationComplete.call(this);
 			}
 			return this;
 		},
 		generateLegend : function(){
 			return template(this.options.legendTemplate,this);
 		},
 		destroy : function(){
 			this.clear();
 			unbindEvents(this, this.events);
 			var canvas = this.chart.canvas;

 			// Reset canvas height/width attributes starts a fresh with the canvas context
 			canvas.width = this.chart.width;
 			canvas.height = this.chart.height;

 			// < IE9 doesn't support removeProperty
 			if (canvas.style.removeProperty) {
 				canvas.style.removeProperty('width');
 				canvas.style.removeProperty('height');
 			} else {
 				canvas.style.removeAttribute('width');
 				canvas.style.removeAttribute('height');
 			}

 			delete Chart.instances[this.id];
 		},
 		showTooltip : function(ChartElements, forceRedraw){
 			// Only redraw the chart if we've actually changed what we're hovering on.
 			if (typeof this.activeElements === 'undefined') this.activeElements = [];

 			var isChanged = (function(Elements){
 				var changed = false;

 				if (Elements.length !== this.activeElements.length){
 					changed = true;
 					return changed;
 				}

 				each(Elements, function(element, index){
 					if (element !== this.activeElements[index]){
 						changed = true;
 					}
 				}, this);
 				return changed;
 			}).call(this, ChartElements);

 			if (!isChanged && !forceRedraw){
 				return;
 			}
 			else{
 				this.activeElements = ChartElements;
 			}
 			this.draw();
 			if(this.options.customTooltips){
 				this.options.customTooltips(false);
 			}
 			if (ChartElements.length > 0){
 				// If we have multiple datasets, show a MultiTooltip for all of the data points at that index
 				if (this.datasets && this.datasets.length > 1) {
 					var dataArray,
 						dataIndex;

 					for (var i = this.datasets.length - 1; i >= 0; i--) {
 						dataArray = this.datasets[i].points || this.datasets[i].bars || this.datasets[i].segments;
 						dataIndex = indexOf(dataArray, ChartElements[0]);
 						if (dataIndex !== -1){
 							break;
 						}
 					}
 					var tooltipLabels = [],
 						tooltipColors = [],
 						medianPosition = (function(index) {

 							// Get all the points at that particular index
 							var Elements = [],
 								dataCollection,
 								xPositions = [],
 								yPositions = [],
 								xMax,
 								yMax,
 								xMin,
 								yMin;
 							helpers.each(this.datasets, function(dataset){
 								dataCollection = dataset.points || dataset.bars || dataset.segments;
 								if (dataCollection[dataIndex] && dataCollection[dataIndex].hasValue()){
 									Elements.push(dataCollection[dataIndex]);
 								}
 							});

 							helpers.each(Elements, function(element) {
 								xPositions.push(element.x);
 								yPositions.push(element.y);


 								//Include any colour information about the element
 								tooltipLabels.push(helpers.template(this.options.multiTooltipTemplate, element));
 								tooltipColors.push({
 									fill: element._saved.fillColor || element.fillColor,
 									stroke: element._saved.strokeColor || element.strokeColor
 								});

 							}, this);

 							yMin = min(yPositions);
 							yMax = max(yPositions);

 							xMin = min(xPositions);
 							xMax = max(xPositions);

 							return {
 								x: (xMin > this.chart.width/2) ? xMin : xMax,
 								y: (yMin + yMax)/2
 							};
 						}).call(this, dataIndex);

 					new Chart.MultiTooltip({
 						x: medianPosition.x,
 						y: medianPosition.y,
 						xPadding: this.options.tooltipXPadding,
 						yPadding: this.options.tooltipYPadding,
 						xOffset: this.options.tooltipXOffset,
 						fillColor: this.options.tooltipFillColor,
 						textColor: this.options.tooltipFontColor,
 						fontFamily: this.options.tooltipFontFamily,
 						fontStyle: this.options.tooltipFontStyle,
 						fontSize: this.options.tooltipFontSize,
 						titleTextColor: this.options.tooltipTitleFontColor,
 						titleFontFamily: this.options.tooltipTitleFontFamily,
 						titleFontStyle: this.options.tooltipTitleFontStyle,
 						titleFontSize: this.options.tooltipTitleFontSize,
 						cornerRadius: this.options.tooltipCornerRadius,
 						labels: tooltipLabels,
 						legendColors: tooltipColors,
 						legendColorBackground : this.options.multiTooltipKeyBackground,
 						title: ChartElements[0].label,
 						chart: this.chart,
 						ctx: this.chart.ctx,
 						custom: this.options.customTooltips
 					}).draw();

 				} else {
 					each(ChartElements, function(Element) {
 						var tooltipPosition = Element.tooltipPosition();
 						new Chart.Tooltip({
 							x: Math.round(tooltipPosition.x),
 							y: Math.round(tooltipPosition.y),
 							xPadding: this.options.tooltipXPadding,
 							yPadding: this.options.tooltipYPadding,
 							fillColor: this.options.tooltipFillColor,
 							textColor: this.options.tooltipFontColor,
 							fontFamily: this.options.tooltipFontFamily,
 							fontStyle: this.options.tooltipFontStyle,
 							fontSize: this.options.tooltipFontSize,
 							caretHeight: this.options.tooltipCaretSize,
 							cornerRadius: this.options.tooltipCornerRadius,
 							text: template(this.options.tooltipTemplate, Element),
 							chart: this.chart,
 							custom: this.options.customTooltips
 						}).draw();
 					}, this);
 				}
 			}
 			return this;
 		},
 		toBase64Image : function(){
 			return this.chart.canvas.toDataURL.apply(this.chart.canvas, arguments);
 		}
 	});

 	Chart.Type.extend = function(extensions){

 		var parent = this;

 		var ChartType = function(){
 			return parent.apply(this,arguments);
 		};

 		//Copy the prototype object of the this class
 		ChartType.prototype = clone(parent.prototype);
 		//Now overwrite some of the properties in the base class with the new extensions
 		extend(ChartType.prototype, extensions);

 		ChartType.extend = Chart.Type.extend;

 		if (extensions.name || parent.prototype.name){

 			var chartName = extensions.name || parent.prototype.name;
 			//Assign any potential default values of the new chart type

 			//If none are defined, we'll use a clone of the chart type this is being extended from.
 			//I.e. if we extend a line chart, we'll use the defaults from the line chart if our new chart
 			//doesn't define some defaults of their own.

 			var baseDefaults = (Chart.defaults[parent.prototype.name]) ? clone(Chart.defaults[parent.prototype.name]) : {};

 			Chart.defaults[chartName] = extend(baseDefaults,extensions.defaults);

 			Chart.types[chartName] = ChartType;

 			//Register this new chart type in the Chart prototype
 			Chart.prototype[chartName] = function(data,options){
 				var config = merge(Chart.defaults.global, Chart.defaults[chartName], options || {});
 				return new ChartType(data,config,this);
 			};
 		} else{
 			warn("Name not provided for this chart, so it hasn't been registered");
 		}
 		return parent;
 	};

 	Chart.Element = function(configuration){
 		extend(this,configuration);
 		this.initialize.apply(this,arguments);
 		this.save();
 	};
 	extend(Chart.Element.prototype,{
 		initialize : function(){},
 		restore : function(props){
 			if (!props){
 				extend(this,this._saved);
 			} else {
 				each(props,function(key){
 					this[key] = this._saved[key];
 				},this);
 			}
 			return this;
 		},
 		save : function(){
 			this._saved = clone(this);
 			delete this._saved._saved;
 			return this;
 		},
 		update : function(newProps){
 			each(newProps,function(value,key){
 				this._saved[key] = this[key];
 				this[key] = value;
 			},this);
 			return this;
 		},
 		transition : function(props,ease){
 			each(props,function(value,key){
 				this[key] = ((value - this._saved[key]) * ease) + this._saved[key];
 			},this);
 			return this;
 		},
 		tooltipPosition : function(){
 			return {
 				x : this.x,
 				y : this.y
 			};
 		},
 		hasValue: function(){
 			return isNumber(this.value);
 		}
 	});

 	Chart.Element.extend = inherits;


 	Chart.Point = Chart.Element.extend({
 		display: true,
 		inRange: function(chartX,chartY){
 			var hitDetectionRange = this.hitDetectionRadius + this.radius;
 			return ((Math.pow(chartX-this.x, 2)+Math.pow(chartY-this.y, 2)) < Math.pow(hitDetectionRange,2));
 		},
 		draw : function(){
 			if (this.display){
 				var ctx = this.ctx;
 				ctx.beginPath();

 				ctx.arc(this.x, this.y, this.radius, 0, Math.PI*2);
 				ctx.closePath();

 				ctx.strokeStyle = this.strokeColor;
 				ctx.lineWidth = this.strokeWidth;

 				ctx.fillStyle = this.fillColor;

 				ctx.fill();
 				ctx.stroke();
 			}


 			//Quick debug for bezier curve splining
 			//Highlights control points and the line between them.
 			//Handy for dev - stripped in the min version.

 			// ctx.save();
 			// ctx.fillStyle = "black";
 			// ctx.strokeStyle = "black"
 			// ctx.beginPath();
 			// ctx.arc(this.controlPoints.inner.x,this.controlPoints.inner.y, 2, 0, Math.PI*2);
 			// ctx.fill();

 			// ctx.beginPath();
 			// ctx.arc(this.controlPoints.outer.x,this.controlPoints.outer.y, 2, 0, Math.PI*2);
 			// ctx.fill();

 			// ctx.moveTo(this.controlPoints.inner.x,this.controlPoints.inner.y);
 			// ctx.lineTo(this.x, this.y);
 			// ctx.lineTo(this.controlPoints.outer.x,this.controlPoints.outer.y);
 			// ctx.stroke();

 			// ctx.restore();



 		}
 	});

 	Chart.Arc = Chart.Element.extend({
 		inRange : function(chartX,chartY){

 			var pointRelativePosition = helpers.getAngleFromPoint(this, {
 				x: chartX,
 				y: chartY
 			});

 			//Check if within the range of the open/close angle
 			var betweenAngles = (pointRelativePosition.angle >= this.startAngle && pointRelativePosition.angle <= this.endAngle),
 				withinRadius = (pointRelativePosition.distance >= this.innerRadius && pointRelativePosition.distance <= this.outerRadius);

 			return (betweenAngles && withinRadius);
 			//Ensure within the outside of the arc centre, but inside arc outer
 		},
 		tooltipPosition : function(){
 			var centreAngle = this.startAngle + ((this.endAngle - this.startAngle) / 2),
 				rangeFromCentre = (this.outerRadius - this.innerRadius) / 2 + this.innerRadius;
 			return {
 				x : this.x + (Math.cos(centreAngle) * rangeFromCentre),
 				y : this.y + (Math.sin(centreAngle) * rangeFromCentre)
 			};
 		},
 		draw : function(animationPercent){

 			var easingDecimal = animationPercent || 1;

 			var ctx = this.ctx;

 			ctx.beginPath();

 			ctx.arc(this.x, this.y, this.outerRadius, this.startAngle, this.endAngle);

 			ctx.arc(this.x, this.y, this.innerRadius, this.endAngle, this.startAngle, true);

 			ctx.closePath();
 			ctx.strokeStyle = this.strokeColor;
 			ctx.lineWidth = this.strokeWidth;

 			ctx.fillStyle = this.fillColor;

 			ctx.fill();
 			ctx.lineJoin = 'bevel';

 			if (this.showStroke){
 				ctx.stroke();
 			}
 		}
 	});

 	Chart.Rectangle = Chart.Element.extend({
 		draw : function(){
 			var ctx = this.ctx,
 				halfWidth = this.width/2,
 				leftX = this.x - halfWidth,
 				rightX = this.x + halfWidth,
 				top = this.base - (this.base - this.y),
 				halfStroke = this.strokeWidth / 2;

 			// Canvas doesn't allow us to stroke inside the width so we can
 			// adjust the sizes to fit if we're setting a stroke on the line
 			if (this.showStroke){
 				leftX += halfStroke;
 				rightX -= halfStroke;
 				top += halfStroke;
 			}

 			ctx.beginPath();

 			ctx.fillStyle = this.fillColor;
 			ctx.strokeStyle = this.strokeColor;
 			ctx.lineWidth = this.strokeWidth;

 			// It'd be nice to keep this class totally generic to any rectangle
 			// and simply specify which border to miss out.
 			ctx.moveTo(leftX, this.base);
 			ctx.lineTo(leftX, top);
 			ctx.lineTo(rightX, top);
 			ctx.lineTo(rightX, this.base);
 			ctx.fill();
 			if (this.showStroke){
 				ctx.stroke();
 			}
 		},
 		height : function(){
 			return this.base - this.y;
 		},
 		inRange : function(chartX,chartY){
 			return (chartX >= this.x - this.width/2 && chartX <= this.x + this.width/2) && (chartY >= this.y && chartY <= this.base);
 		}
 	});

 	Chart.Tooltip = Chart.Element.extend({
 		draw : function(){

 			var ctx = this.chart.ctx;

 			ctx.font = fontString(this.fontSize,this.fontStyle,this.fontFamily);

 			this.xAlign = "center";
 			this.yAlign = "above";

 			//Distance between the actual element.y position and the start of the tooltip caret
 			var caretPadding = this.caretPadding = 2;

 			var tooltipWidth = ctx.measureText(this.text).width + 2*this.xPadding,
 				tooltipRectHeight = this.fontSize + 2*this.yPadding,
 				tooltipHeight = tooltipRectHeight + this.caretHeight + caretPadding;

 			if (this.x + tooltipWidth/2 >this.chart.width){
 				this.xAlign = "left";
 			} else if (this.x - tooltipWidth/2 < 0){
 				this.xAlign = "right";
 			}

 			if (this.y - tooltipHeight < 0){
 				this.yAlign = "below";
 			}


 			var tooltipX = this.x - tooltipWidth/2,
 				tooltipY = this.y - tooltipHeight;

 			ctx.fillStyle = this.fillColor;

 			// Custom Tooltips
 			if(this.custom){
 				this.custom(this);
 			}
 			else{
 				switch(this.yAlign)
 				{
 				case "above":
 					//Draw a caret above the x/y
 					ctx.beginPath();
 					ctx.moveTo(this.x,this.y - caretPadding);
 					ctx.lineTo(this.x + this.caretHeight, this.y - (caretPadding + this.caretHeight));
 					ctx.lineTo(this.x - this.caretHeight, this.y - (caretPadding + this.caretHeight));
 					ctx.closePath();
 					ctx.fill();
 					break;
 				case "below":
 					tooltipY = this.y + caretPadding + this.caretHeight;
 					//Draw a caret below the x/y
 					ctx.beginPath();
 					ctx.moveTo(this.x, this.y + caretPadding);
 					ctx.lineTo(this.x + this.caretHeight, this.y + caretPadding + this.caretHeight);
 					ctx.lineTo(this.x - this.caretHeight, this.y + caretPadding + this.caretHeight);
 					ctx.closePath();
 					ctx.fill();
 					break;
 				}

 				switch(this.xAlign)
 				{
 				case "left":
 					tooltipX = this.x - tooltipWidth + (this.cornerRadius + this.caretHeight);
 					break;
 				case "right":
 					tooltipX = this.x - (this.cornerRadius + this.caretHeight);
 					break;
 				}

 				drawRoundedRectangle(ctx,tooltipX,tooltipY,tooltipWidth,tooltipRectHeight,this.cornerRadius);

 				ctx.fill();

 				ctx.fillStyle = this.textColor;
 				ctx.textAlign = "center";
 				ctx.textBaseline = "middle";
 				ctx.fillText(this.text, tooltipX + tooltipWidth/2, tooltipY + tooltipRectHeight/2);
 			}
 		}
 	});

 	Chart.MultiTooltip = Chart.Element.extend({
 		initialize : function(){
 			this.font = fontString(this.fontSize,this.fontStyle,this.fontFamily);

 			this.titleFont = fontString(this.titleFontSize,this.titleFontStyle,this.titleFontFamily);

 			this.height = (this.labels.length * this.fontSize) + ((this.labels.length-1) * (this.fontSize/2)) + (this.yPadding*2) + this.titleFontSize *1.5;

 			this.ctx.font = this.titleFont;

 			var titleWidth = this.ctx.measureText(this.title).width,
 				//Label has a legend square as well so account for this.
 				labelWidth = longestText(this.ctx,this.font,this.labels) + this.fontSize + 3,
 				longestTextWidth = max([labelWidth,titleWidth]);

 			this.width = longestTextWidth + (this.xPadding*2);


 			var halfHeight = this.height/2;

 			//Check to ensure the height will fit on the canvas
 			if (this.y - halfHeight < 0 ){
 				this.y = halfHeight;
 			} else if (this.y + halfHeight > this.chart.height){
 				this.y = this.chart.height - halfHeight;
 			}

 			//Decide whether to align left or right based on position on canvas
 			if (this.x > this.chart.width/2){
 				this.x -= this.xOffset + this.width;
 			} else {
 				this.x += this.xOffset;
 			}


 		},
 		getLineHeight : function(index){
 			var baseLineHeight = this.y - (this.height/2) + this.yPadding,
 				afterTitleIndex = index-1;

 			//If the index is zero, we're getting the title
 			if (index === 0){
 				return baseLineHeight + this.titleFontSize/2;
 			} else{
 				return baseLineHeight + ((this.fontSize*1.5*afterTitleIndex) + this.fontSize/2) + this.titleFontSize * 1.5;
 			}

 		},
 		draw : function(){
 			// Custom Tooltips
 			if(this.custom){
 				this.custom(this);
 			}
 			else{
 				drawRoundedRectangle(this.ctx,this.x,this.y - this.height/2,this.width,this.height,this.cornerRadius);
 				var ctx = this.ctx;
 				ctx.fillStyle = this.fillColor;
 				ctx.fill();
 				ctx.closePath();

 				ctx.textAlign = "left";
 				ctx.textBaseline = "middle";
 				ctx.fillStyle = this.titleTextColor;
 				ctx.font = this.titleFont;

 				ctx.fillText(this.title,this.x + this.xPadding, this.getLineHeight(0));

 				ctx.font = this.font;
 				helpers.each(this.labels,function(label,index){
 					ctx.fillStyle = this.textColor;
 					ctx.fillText(label,this.x + this.xPadding + this.fontSize + 3, this.getLineHeight(index + 1));

 					//A bit gnarly, but clearing this rectangle breaks when using explorercanvas (clears whole canvas)
 					//ctx.clearRect(this.x + this.xPadding, this.getLineHeight(index + 1) - this.fontSize/2, this.fontSize, this.fontSize);
 					//Instead we'll make a white filled block to put the legendColour palette over.

 					ctx.fillStyle = this.legendColorBackground;
 					ctx.fillRect(this.x + this.xPadding, this.getLineHeight(index + 1) - this.fontSize/2, this.fontSize, this.fontSize);

 					ctx.fillStyle = this.legendColors[index].fill;
 					ctx.fillRect(this.x + this.xPadding, this.getLineHeight(index + 1) - this.fontSize/2, this.fontSize, this.fontSize);


 				},this);
 			}
 		}
 	});

 	Chart.Scale = Chart.Element.extend({
 		initialize : function(){
 			this.fit();
 		},
 		buildYLabels : function(){
 			this.yLabels = [];

 			var stepDecimalPlaces = getDecimalPlaces(this.stepValue);

 			for (var i=0; i<=this.steps; i++){
 				this.yLabels.push(template(this.templateString,{value:(this.min + (i * this.stepValue)).toFixed(stepDecimalPlaces)}));
 			}
 			this.yLabelWidth = (this.display && this.showLabels) ? longestText(this.ctx,this.font,this.yLabels) : 0;
 		},
 		addXLabel : function(label){
 			this.xLabels.push(label);
 			this.valuesCount++;
 			this.fit();
 		},
 		removeXLabel : function(){
 			this.xLabels.shift();
 			this.valuesCount--;
 			this.fit();
 		},
 		// Fitting loop to rotate x Labels and figure out what fits there, and also calculate how many Y steps to use
 		fit: function(){
 			// First we need the width of the yLabels, assuming the xLabels aren't rotated

 			// To do that we need the base line at the top and base of the chart, assuming there is no x label rotation
 			this.startPoint = (this.display) ? this.fontSize : 0;
 			this.endPoint = (this.display) ? this.height - (this.fontSize * 1.5) - 5 : this.height; // -5 to pad labels

 			// Apply padding settings to the start and end point.
 			this.startPoint += this.padding;
 			this.endPoint -= this.padding;

 			// Cache the starting height, so can determine if we need to recalculate the scale yAxis
 			var cachedHeight = this.endPoint - this.startPoint,
 				cachedYLabelWidth;

 			// Build the current yLabels so we have an idea of what size they'll be to start
 			/*
 			 *	This sets what is returned from calculateScaleRange as static properties of this class:
 			 *
 				this.steps;
 				this.stepValue;
 				this.min;
 				this.max;
 			 *
 			 */
 			this.calculateYRange(cachedHeight);

 			// With these properties set we can now build the array of yLabels
 			// and also the width of the largest yLabel
 			this.buildYLabels();

 			this.calculateXLabelRotation();

 			while((cachedHeight > this.endPoint - this.startPoint)){
 				cachedHeight = this.endPoint - this.startPoint;
 				cachedYLabelWidth = this.yLabelWidth;

 				this.calculateYRange(cachedHeight);
 				this.buildYLabels();

 				// Only go through the xLabel loop again if the yLabel width has changed
 				if (cachedYLabelWidth < this.yLabelWidth){
 					this.calculateXLabelRotation();
 				}
 			}

 		},
 		calculateXLabelRotation : function(){
 			//Get the width of each grid by calculating the difference
 			//between x offsets between 0 and 1.

 			this.ctx.font = this.font;

 			var firstWidth = this.ctx.measureText(this.xLabels[0]).width,
 				lastWidth = this.ctx.measureText(this.xLabels[this.xLabels.length - 1]).width,
 				firstRotated,
 				lastRotated;


 			this.xScalePaddingRight = lastWidth/2 + 3;
 			this.xScalePaddingLeft = (firstWidth/2 > this.yLabelWidth + 10) ? firstWidth/2 : this.yLabelWidth + 10;

 			this.xLabelRotation = 0;
 			if (this.display){
 				var originalLabelWidth = longestText(this.ctx,this.font,this.xLabels),
 					cosRotation,
 					firstRotatedWidth;
 				this.xLabelWidth = originalLabelWidth;
 				//Allow 3 pixels x2 padding either side for label readability
 				var xGridWidth = Math.floor(this.calculateX(1) - this.calculateX(0)) - 6;

 				//Max label rotate should be 90 - also act as a loop counter
 				while ((this.xLabelWidth > xGridWidth && this.xLabelRotation === 0) || (this.xLabelWidth > xGridWidth && this.xLabelRotation <= 90 && this.xLabelRotation > 0)){
 					cosRotation = Math.cos(toRadians(this.xLabelRotation));

 					firstRotated = cosRotation * firstWidth;
 					lastRotated = cosRotation * lastWidth;

 					// We're right aligning the text now.
 					if (firstRotated + this.fontSize / 2 > this.yLabelWidth + 8){
 						this.xScalePaddingLeft = firstRotated + this.fontSize / 2;
 					}
 					this.xScalePaddingRight = this.fontSize/2;


 					this.xLabelRotation++;
 					this.xLabelWidth = cosRotation * originalLabelWidth;

 				}
 				if (this.xLabelRotation > 0){
 					this.endPoint -= Math.sin(toRadians(this.xLabelRotation))*originalLabelWidth + 3;
 				}
 			}
 			else{
 				this.xLabelWidth = 0;
 				this.xScalePaddingRight = this.padding;
 				this.xScalePaddingLeft = this.padding;
 			}

 		},
 		// Needs to be overidden in each Chart type
 		// Otherwise we need to pass all the data into the scale class
 		calculateYRange: noop,
 		drawingArea: function(){
 			return this.startPoint - this.endPoint;
 		},
 		calculateY : function(value){
 			var scalingFactor = this.drawingArea() / (this.min - this.max);
 			return this.endPoint - (scalingFactor * (value - this.min));
 		},
 		calculateX : function(index){
 			var isRotated = (this.xLabelRotation > 0),
 				// innerWidth = (this.offsetGridLines) ? this.width - offsetLeft - this.padding : this.width - (offsetLeft + halfLabelWidth * 2) - this.padding,
 				innerWidth = this.width - (this.xScalePaddingLeft + this.xScalePaddingRight),
 				valueWidth = innerWidth/Math.max((this.valuesCount - ((this.offsetGridLines) ? 0 : 1)), 1),
 				valueOffset = (valueWidth * index) + this.xScalePaddingLeft;

 			if (this.offsetGridLines){
 				valueOffset += (valueWidth/2);
 			}

 			return Math.round(valueOffset);
 		},
 		update : function(newProps){
 			helpers.extend(this, newProps);
 			this.fit();
 		},
 		draw : function(){
 			var ctx = this.ctx,
 				yLabelGap = (this.endPoint - this.startPoint) / this.steps,
 				xStart = Math.round(this.xScalePaddingLeft);
 			if (this.display){
 				ctx.fillStyle = this.textColor;
 				ctx.font = this.font;
 				each(this.yLabels,function(labelString,index){
 					var yLabelCenter = this.endPoint - (yLabelGap * index),
 						linePositionY = Math.round(yLabelCenter),
 						drawHorizontalLine = this.showHorizontalLines;

 					ctx.textAlign = "right";
 					ctx.textBaseline = "middle";
 					if (this.showLabels){
 						ctx.fillText(labelString,xStart - 10,yLabelCenter);
 					}

 					// This is X axis, so draw it
 					if (index === 0 && !drawHorizontalLine){
 						drawHorizontalLine = true;
 					}

 					if (drawHorizontalLine){
 						ctx.beginPath();
 					}

 					if (index > 0){
 						// This is a grid line in the centre, so drop that
 						ctx.lineWidth = this.gridLineWidth;
 						ctx.strokeStyle = this.gridLineColor;
 					} else {
 						// This is the first line on the scale
 						ctx.lineWidth = this.lineWidth;
 						ctx.strokeStyle = this.lineColor;
 					}

 					linePositionY += helpers.aliasPixel(ctx.lineWidth);

 					if(drawHorizontalLine){
 						ctx.moveTo(xStart, linePositionY);
 						ctx.lineTo(this.width, linePositionY);
 						ctx.stroke();
 						ctx.closePath();
 					}

 					ctx.lineWidth = this.lineWidth;
 					ctx.strokeStyle = this.lineColor;
 					ctx.beginPath();
 					ctx.moveTo(xStart - 5, linePositionY);
 					ctx.lineTo(xStart, linePositionY);
 					ctx.stroke();
 					ctx.closePath();

 				},this);

 				each(this.xLabels,function(label,index){
 					var xPos = this.calculateX(index) + aliasPixel(this.lineWidth),
 						// Check to see if line/bar here and decide where to place the line
 						linePos = this.calculateX(index - (this.offsetGridLines ? 0.5 : 0)) + aliasPixel(this.lineWidth),
 						isRotated = (this.xLabelRotation > 0),
 						drawVerticalLine = this.showVerticalLines;

 					// This is Y axis, so draw it
 					if (index === 0 && !drawVerticalLine){
 						drawVerticalLine = true;
 					}

 					if (drawVerticalLine){
 						ctx.beginPath();
 					}

 					if (index > 0){
 						// This is a grid line in the centre, so drop that
 						ctx.lineWidth = this.gridLineWidth;
 						ctx.strokeStyle = this.gridLineColor;
 					} else {
 						// This is the first line on the scale
 						ctx.lineWidth = this.lineWidth;
 						ctx.strokeStyle = this.lineColor;
 					}

 					if (drawVerticalLine){
 						ctx.moveTo(linePos,this.endPoint);
 						ctx.lineTo(linePos,this.startPoint - 3);
 						ctx.stroke();
 						ctx.closePath();
 					}


 					ctx.lineWidth = this.lineWidth;
 					ctx.strokeStyle = this.lineColor;


 					// Small lines at the bottom of the base grid line
 					ctx.beginPath();
 					ctx.moveTo(linePos,this.endPoint);
 					ctx.lineTo(linePos,this.endPoint + 5);
 					ctx.stroke();
 					ctx.closePath();

 					ctx.save();
 					ctx.translate(xPos,(isRotated) ? this.endPoint + 12 : this.endPoint + 8);
 					ctx.rotate(toRadians(this.xLabelRotation)*-1);
 					ctx.font = this.font;
 					ctx.textAlign = (isRotated) ? "right" : "center";
 					ctx.textBaseline = (isRotated) ? "middle" : "top";
 					ctx.fillText(label, 0, 0);
 					ctx.restore();
 				},this);

 			}
 		}

 	});

 	Chart.RadialScale = Chart.Element.extend({
 		initialize: function(){
 			this.size = min([this.height, this.width]);
 			this.drawingArea = (this.display) ? (this.size/2) - (this.fontSize/2 + this.backdropPaddingY) : (this.size/2);
 		},
 		calculateCenterOffset: function(value){
 			// Take into account half font size + the yPadding of the top value
 			var scalingFactor = this.drawingArea / (this.max - this.min);

 			return (value - this.min) * scalingFactor;
 		},
 		update : function(){
 			if (!this.lineArc){
 				this.setScaleSize();
 			} else {
 				this.drawingArea = (this.display) ? (this.size/2) - (this.fontSize/2 + this.backdropPaddingY) : (this.size/2);
 			}
 			this.buildYLabels();
 		},
 		buildYLabels: function(){
 			this.yLabels = [];

 			var stepDecimalPlaces = getDecimalPlaces(this.stepValue);

 			for (var i=0; i<=this.steps; i++){
 				this.yLabels.push(template(this.templateString,{value:(this.min + (i * this.stepValue)).toFixed(stepDecimalPlaces)}));
 			}
 		},
 		getCircumference : function(){
 			return ((Math.PI*2) / this.valuesCount);
 		},
 		setScaleSize: function(){
 			/*
 			 * Right, this is really confusing and there is a lot of maths going on here
 			 * The gist of the problem is here: https://gist.github.com/nnnick/696cc9c55f4b0beb8fe9
 			 *
 			 * Reaction: https://dl.dropboxusercontent.com/u/34601363/toomuchscience.gif
 			 *
 			 * Solution:
 			 *
 			 * We assume the radius of the polygon is half the size of the canvas at first
 			 * at each index we check if the text overlaps.
 			 *
 			 * Where it does, we store that angle and that index.
 			 *
 			 * After finding the largest index and angle we calculate how much we need to remove
 			 * from the shape radius to move the point inwards by that x.
 			 *
 			 * We average the left and right distances to get the maximum shape radius that can fit in the box
 			 * along with labels.
 			 *
 			 * Once we have that, we can find the centre point for the chart, by taking the x text protrusion
 			 * on each side, removing that from the size, halving it and adding the left x protrusion width.
 			 *
 			 * This will mean we have a shape fitted to the canvas, as large as it can be with the labels
 			 * and position it in the most space efficient manner
 			 *
 			 * https://dl.dropboxusercontent.com/u/34601363/yeahscience.gif
 			 */


 			// Get maximum radius of the polygon. Either half the height (minus the text width) or half the width.
 			// Use this to calculate the offset + change. - Make sure L/R protrusion is at least 0 to stop issues with centre points
 			var largestPossibleRadius = min([(this.height/2 - this.pointLabelFontSize - 5), this.width/2]),
 				pointPosition,
 				i,
 				textWidth,
 				halfTextWidth,
 				furthestRight = this.width,
 				furthestRightIndex,
 				furthestRightAngle,
 				furthestLeft = 0,
 				furthestLeftIndex,
 				furthestLeftAngle,
 				xProtrusionLeft,
 				xProtrusionRight,
 				radiusReductionRight,
 				radiusReductionLeft,
 				maxWidthRadius;
 			this.ctx.font = fontString(this.pointLabelFontSize,this.pointLabelFontStyle,this.pointLabelFontFamily);
 			for (i=0;i<this.valuesCount;i++){
 				// 5px to space the text slightly out - similar to what we do in the draw function.
 				pointPosition = this.getPointPosition(i, largestPossibleRadius);
 				textWidth = this.ctx.measureText(template(this.templateString, { value: this.labels[i] })).width + 5;
 				if (i === 0 || i === this.valuesCount/2){
 					// If we're at index zero, or exactly the middle, we're at exactly the top/bottom
 					// of the radar chart, so text will be aligned centrally, so we'll half it and compare
 					// w/left and right text sizes
 					halfTextWidth = textWidth/2;
 					if (pointPosition.x + halfTextWidth > furthestRight) {
 						furthestRight = pointPosition.x + halfTextWidth;
 						furthestRightIndex = i;
 					}
 					if (pointPosition.x - halfTextWidth < furthestLeft) {
 						furthestLeft = pointPosition.x - halfTextWidth;
 						furthestLeftIndex = i;
 					}
 				}
 				else if (i < this.valuesCount/2) {
 					// Less than half the values means we'll left align the text
 					if (pointPosition.x + textWidth > furthestRight) {
 						furthestRight = pointPosition.x + textWidth;
 						furthestRightIndex = i;
 					}
 				}
 				else if (i > this.valuesCount/2){
 					// More than half the values means we'll right align the text
 					if (pointPosition.x - textWidth < furthestLeft) {
 						furthestLeft = pointPosition.x - textWidth;
 						furthestLeftIndex = i;
 					}
 				}
 			}

 			xProtrusionLeft = furthestLeft;

 			xProtrusionRight = Math.ceil(furthestRight - this.width);

 			furthestRightAngle = this.getIndexAngle(furthestRightIndex);

 			furthestLeftAngle = this.getIndexAngle(furthestLeftIndex);

 			radiusReductionRight = xProtrusionRight / Math.sin(furthestRightAngle + Math.PI/2);

 			radiusReductionLeft = xProtrusionLeft / Math.sin(furthestLeftAngle + Math.PI/2);

 			// Ensure we actually need to reduce the size of the chart
 			radiusReductionRight = (isNumber(radiusReductionRight)) ? radiusReductionRight : 0;
 			radiusReductionLeft = (isNumber(radiusReductionLeft)) ? radiusReductionLeft : 0;

 			this.drawingArea = largestPossibleRadius - (radiusReductionLeft + radiusReductionRight)/2;

 			//this.drawingArea = min([maxWidthRadius, (this.height - (2 * (this.pointLabelFontSize + 5)))/2])
 			this.setCenterPoint(radiusReductionLeft, radiusReductionRight);

 		},
 		setCenterPoint: function(leftMovement, rightMovement){

 			var maxRight = this.width - rightMovement - this.drawingArea,
 				maxLeft = leftMovement + this.drawingArea;

 			this.xCenter = (maxLeft + maxRight)/2;
 			// Always vertically in the centre as the text height doesn't change
 			this.yCenter = (this.height/2);
 		},

 		getIndexAngle : function(index){
 			var angleMultiplier = (Math.PI * 2) / this.valuesCount;
 			// Start from the top instead of right, so remove a quarter of the circle

 			return index * angleMultiplier - (Math.PI/2);
 		},
 		getPointPosition : function(index, distanceFromCenter){
 			var thisAngle = this.getIndexAngle(index);
 			return {
 				x : (Math.cos(thisAngle) * distanceFromCenter) + this.xCenter,
 				y : (Math.sin(thisAngle) * distanceFromCenter) + this.yCenter
 			};
 		},
 		draw: function(){
 			if (this.display){
 				var ctx = this.ctx;
 				each(this.yLabels, function(label, index){
 					// Don't draw a centre value
 					if (index > 0){
 						var yCenterOffset = index * (this.drawingArea/this.steps),
 							yHeight = this.yCenter - yCenterOffset,
 							pointPosition;

 						// Draw circular lines around the scale
 						if (this.lineWidth > 0){
 							ctx.strokeStyle = this.lineColor;
 							ctx.lineWidth = this.lineWidth;

 							if(this.lineArc){
 								ctx.beginPath();
 								ctx.arc(this.xCenter, this.yCenter, yCenterOffset, 0, Math.PI*2);
 								ctx.closePath();
 								ctx.stroke();
 							} else{
 								ctx.beginPath();
 								for (var i=0;i<this.valuesCount;i++)
 								{
 									pointPosition = this.getPointPosition(i, this.calculateCenterOffset(this.min + (index * this.stepValue)));
 									if (i === 0){
 										ctx.moveTo(pointPosition.x, pointPosition.y);
 									} else {
 										ctx.lineTo(pointPosition.x, pointPosition.y);
 									}
 								}
 								ctx.closePath();
 								ctx.stroke();
 							}
 						}
 						if(this.showLabels){
 							ctx.font = fontString(this.fontSize,this.fontStyle,this.fontFamily);
 							if (this.showLabelBackdrop){
 								var labelWidth = ctx.measureText(label).width;
 								ctx.fillStyle = this.backdropColor;
 								ctx.fillRect(
 									this.xCenter - labelWidth/2 - this.backdropPaddingX,
 									yHeight - this.fontSize/2 - this.backdropPaddingY,
 									labelWidth + this.backdropPaddingX*2,
 									this.fontSize + this.backdropPaddingY*2
 								);
 							}
 							ctx.textAlign = 'center';
 							ctx.textBaseline = "middle";
 							ctx.fillStyle = this.fontColor;
 							ctx.fillText(label, this.xCenter, yHeight);
 						}
 					}
 				}, this);

 				if (!this.lineArc){
 					ctx.lineWidth = this.angleLineWidth;
 					ctx.strokeStyle = this.angleLineColor;
 					for (var i = this.valuesCount - 1; i >= 0; i--) {
 						if (this.angleLineWidth > 0){
 							var outerPosition = this.getPointPosition(i, this.calculateCenterOffset(this.max));
 							ctx.beginPath();
 							ctx.moveTo(this.xCenter, this.yCenter);
 							ctx.lineTo(outerPosition.x, outerPosition.y);
 							ctx.stroke();
 							ctx.closePath();
 						}
 						// Extra 3px out for some label spacing
 						var pointLabelPosition = this.getPointPosition(i, this.calculateCenterOffset(this.max) + 5);
 						ctx.font = fontString(this.pointLabelFontSize,this.pointLabelFontStyle,this.pointLabelFontFamily);
 						ctx.fillStyle = this.pointLabelFontColor;

 						var labelsCount = this.labels.length,
 							halfLabelsCount = this.labels.length/2,
 							quarterLabelsCount = halfLabelsCount/2,
 							upperHalf = (i < quarterLabelsCount || i > labelsCount - quarterLabelsCount),
 							exactQuarter = (i === quarterLabelsCount || i === labelsCount - quarterLabelsCount);
 						if (i === 0){
 							ctx.textAlign = 'center';
 						} else if(i === halfLabelsCount){
 							ctx.textAlign = 'center';
 						} else if (i < halfLabelsCount){
 							ctx.textAlign = 'left';
 						} else {
 							ctx.textAlign = 'right';
 						}

 						// Set the correct text baseline based on outer positioning
 						if (exactQuarter){
 							ctx.textBaseline = 'middle';
 						} else if (upperHalf){
 							ctx.textBaseline = 'bottom';
 						} else {
 							ctx.textBaseline = 'top';
 						}

 						ctx.fillText(this.labels[i], pointLabelPosition.x, pointLabelPosition.y);
 					}
 				}
 			}
 		}
 	});

 	// Attach global event to resize each chart instance when the browser resizes
 	helpers.addEvent(window, "resize", (function(){
 		// Basic debounce of resize function so it doesn't hurt performance when resizing browser.
 		var timeout;
 		return function(){
 			clearTimeout(timeout);
 			timeout = setTimeout(function(){
 				each(Chart.instances,function(instance){
 					// If the responsive flag is set in the chart instance config
 					// Cascade the resize event down to the chart.
 					if (instance.options.responsive){
 						instance.resize(instance.render, true);
 					}
 				});
 			}, 50);
 		};
 	})());


 	if (amd) {
 		define(function(){
 			return Chart;
 		});
 	} else if (typeof module === 'object' && module.exports) {
 		module.exports = Chart;
 	}

 	root.Chart = Chart;

 	Chart.noConflict = function(){
 		root.Chart = previous;
 		return Chart;
 	};

 }).call(this);

 (function(){
 	"use strict";

 	var root = this,
 		Chart = root.Chart,
 		helpers = Chart.helpers;


 	var defaultConfig = {
 		//Boolean - Whether the scale should start at zero, or an order of magnitude down from the lowest value
 		scaleBeginAtZero : true,

 		//Boolean - Whether grid lines are shown across the chart
 		scaleShowGridLines : true,

 		//String - Colour of the grid lines
 		scaleGridLineColor : "rgba(0,0,0,.05)",

 		//Number - Width of the grid lines
 		scaleGridLineWidth : 1,

 		//Boolean - Whether to show horizontal lines (except X axis)
 		scaleShowHorizontalLines: true,

 		//Boolean - Whether to show vertical lines (except Y axis)
 		scaleShowVerticalLines: true,

 		//Boolean - If there is a stroke on each bar
 		barShowStroke : true,

 		//Number - Pixel width of the bar stroke
 		barStrokeWidth : 2,

 		//Number - Spacing between each of the X value sets
 		barValueSpacing : 5,

 		//Number - Spacing between data sets within X values
 		barDatasetSpacing : 1,

 		//String - A legend template
 		legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span style=\"background-color:<%=datasets[i].fillColor%>\"></span><%if(datasets[i].label){%><%=datasets[i].label%><%}%></li><%}%></ul>"

 	};


 	Chart.Type.extend({
 		name: "Bar",
 		defaults : defaultConfig,
 		initialize:  function(data){

 			//Expose options as a scope variable here so we can access it in the ScaleClass
 			var options = this.options;

 			this.ScaleClass = Chart.Scale.extend({
 				offsetGridLines : true,
 				calculateBarX : function(datasetCount, datasetIndex, barIndex){
 					//Reusable method for calculating the xPosition of a given bar based on datasetIndex & width of the bar
 					var xWidth = this.calculateBaseWidth(),
 						xAbsolute = this.calculateX(barIndex) - (xWidth/2),
 						barWidth = this.calculateBarWidth(datasetCount);

 					return xAbsolute + (barWidth * datasetIndex) + (datasetIndex * options.barDatasetSpacing) + barWidth/2;
 				},
 				calculateBaseWidth : function(){
 					return (this.calculateX(1) - this.calculateX(0)) - (2*options.barValueSpacing);
 				},
 				calculateBarWidth : function(datasetCount){
 					//The padding between datasets is to the right of each bar, providing that there are more than 1 dataset
 					var baseWidth = this.calculateBaseWidth() - ((datasetCount - 1) * options.barDatasetSpacing);

 					return (baseWidth / datasetCount);
 				}
 			});

 			this.datasets = [];

 			//Set up tooltip events on the chart
 			if (this.options.showTooltips){
 				helpers.bindEvents(this, this.options.tooltipEvents, function(evt){
 					var activeBars = (evt.type !== 'mouseout') ? this.getBarsAtEvent(evt) : [];

 					this.eachBars(function(bar){
 						bar.restore(['fillColor', 'strokeColor']);
 					});
 					helpers.each(activeBars, function(activeBar){
 						activeBar.fillColor = activeBar.highlightFill;
 						activeBar.strokeColor = activeBar.highlightStroke;
 					});
 					this.showTooltip(activeBars);
 				});
 			}

 			//Declare the extension of the default point, to cater for the options passed in to the constructor
 			this.BarClass = Chart.Rectangle.extend({
 				strokeWidth : this.options.barStrokeWidth,
 				showStroke : this.options.barShowStroke,
 				ctx : this.chart.ctx
 			});

 			//Iterate through each of the datasets, and build this into a property of the chart
 			helpers.each(data.datasets,function(dataset,datasetIndex){

 				var datasetObject = {
 					label : dataset.label || null,
 					fillColor : dataset.fillColor,
 					strokeColor : dataset.strokeColor,
 					bars : []
 				};

 				this.datasets.push(datasetObject);

 				helpers.each(dataset.data,function(dataPoint,index){
 					//Add a new point for each piece of data, passing any required data to draw.
 					datasetObject.bars.push(new this.BarClass({
 						value : dataPoint,
 						label : data.labels[index],
 						datasetLabel: dataset.label,
 						strokeColor : dataset.strokeColor,
 						fillColor : dataset.fillColor,
 						highlightFill : dataset.highlightFill || dataset.fillColor,
 						highlightStroke : dataset.highlightStroke || dataset.strokeColor
 					}));
 				},this);

 			},this);

 			this.buildScale(data.labels);

 			this.BarClass.prototype.base = this.scale.endPoint;

 			this.eachBars(function(bar, index, datasetIndex){
 				helpers.extend(bar, {
 					width : this.scale.calculateBarWidth(this.datasets.length),
 					x: this.scale.calculateBarX(this.datasets.length, datasetIndex, index),
 					y: this.scale.endPoint
 				});
 				bar.save();
 			}, this);

 			this.render();
 		},
 		update : function(){
 			this.scale.update();
 			// Reset any highlight colours before updating.
 			helpers.each(this.activeElements, function(activeElement){
 				activeElement.restore(['fillColor', 'strokeColor']);
 			});

 			this.eachBars(function(bar){
 				bar.save();
 			});
 			this.render();
 		},
 		eachBars : function(callback){
 			helpers.each(this.datasets,function(dataset, datasetIndex){
 				helpers.each(dataset.bars, callback, this, datasetIndex);
 			},this);
 		},
 		getBarsAtEvent : function(e){
 			var barsArray = [],
 				eventPosition = helpers.getRelativePosition(e),
 				datasetIterator = function(dataset){
 					barsArray.push(dataset.bars[barIndex]);
 				},
 				barIndex;

 			for (var datasetIndex = 0; datasetIndex < this.datasets.length; datasetIndex++) {
 				for (barIndex = 0; barIndex < this.datasets[datasetIndex].bars.length; barIndex++) {
 					if (this.datasets[datasetIndex].bars[barIndex].inRange(eventPosition.x,eventPosition.y)){
 						helpers.each(this.datasets, datasetIterator);
 						return barsArray;
 					}
 				}
 			}

 			return barsArray;
 		},
 		buildScale : function(labels){
 			var self = this;

 			var dataTotal = function(){
 				var values = [];
 				self.eachBars(function(bar){
 					values.push(bar.value);
 				});
 				return values;
 			};

 			var scaleOptions = {
 				templateString : this.options.scaleLabel,
 				height : this.chart.height,
 				width : this.chart.width,
 				ctx : this.chart.ctx,
 				textColor : this.options.scaleFontColor,
 				fontSize : this.options.scaleFontSize,
 				fontStyle : this.options.scaleFontStyle,
 				fontFamily : this.options.scaleFontFamily,
 				valuesCount : labels.length,
 				beginAtZero : this.options.scaleBeginAtZero,
 				integersOnly : this.options.scaleIntegersOnly,
 				calculateYRange: function(currentHeight){
 					var updatedRanges = helpers.calculateScaleRange(
 						dataTotal(),
 						currentHeight,
 						this.fontSize,
 						this.beginAtZero,
 						this.integersOnly
 					);
 					helpers.extend(this, updatedRanges);
 				},
 				xLabels : labels,
 				font : helpers.fontString(this.options.scaleFontSize, this.options.scaleFontStyle, this.options.scaleFontFamily),
 				lineWidth : this.options.scaleLineWidth,
 				lineColor : this.options.scaleLineColor,
 				showHorizontalLines : this.options.scaleShowHorizontalLines,
 				showVerticalLines : this.options.scaleShowVerticalLines,
 				gridLineWidth : (this.options.scaleShowGridLines) ? this.options.scaleGridLineWidth : 0,
 				gridLineColor : (this.options.scaleShowGridLines) ? this.options.scaleGridLineColor : "rgba(0,0,0,0)",
 				padding : (this.options.showScale) ? 0 : (this.options.barShowStroke) ? this.options.barStrokeWidth : 0,
 				showLabels : this.options.scaleShowLabels,
 				display : this.options.showScale
 			};

 			if (this.options.scaleOverride){
 				helpers.extend(scaleOptions, {
 					calculateYRange: helpers.noop,
 					steps: this.options.scaleSteps,
 					stepValue: this.options.scaleStepWidth,
 					min: this.options.scaleStartValue,
 					max: this.options.scaleStartValue + (this.options.scaleSteps * this.options.scaleStepWidth)
 				});
 			}

 			this.scale = new this.ScaleClass(scaleOptions);
 		},
 		addData : function(valuesArray,label){
 			//Map the values array for each of the datasets
 			helpers.each(valuesArray,function(value,datasetIndex){
 				//Add a new point for each piece of data, passing any required data to draw.
 				this.datasets[datasetIndex].bars.push(new this.BarClass({
 					value : value,
 					label : label,
 					x: this.scale.calculateBarX(this.datasets.length, datasetIndex, this.scale.valuesCount+1),
 					y: this.scale.endPoint,
 					width : this.scale.calculateBarWidth(this.datasets.length),
 					base : this.scale.endPoint,
 					strokeColor : this.datasets[datasetIndex].strokeColor,
 					fillColor : this.datasets[datasetIndex].fillColor
 				}));
 			},this);

 			this.scale.addXLabel(label);
 			//Then re-render the chart.
 			this.update();
 		},
 		removeData : function(){
 			this.scale.removeXLabel();
 			//Then re-render the chart.
 			helpers.each(this.datasets,function(dataset){
 				dataset.bars.shift();
 			},this);
 			this.update();
 		},
 		reflow : function(){
 			helpers.extend(this.BarClass.prototype,{
 				y: this.scale.endPoint,
 				base : this.scale.endPoint
 			});
 			var newScaleProps = helpers.extend({
 				height : this.chart.height,
 				width : this.chart.width
 			});
 			this.scale.update(newScaleProps);
 		},
 		draw : function(ease){
 			var easingDecimal = ease || 1;
 			this.clear();

 			var ctx = this.chart.ctx;

 			this.scale.draw(easingDecimal);

 			//Draw all the bars for each dataset
 			helpers.each(this.datasets,function(dataset,datasetIndex){
 				helpers.each(dataset.bars,function(bar,index){
 					if (bar.hasValue()){
 						bar.base = this.scale.endPoint;
 						//Transition then draw
 						bar.transition({
 							x : this.scale.calculateBarX(this.datasets.length, datasetIndex, index),
 							y : this.scale.calculateY(bar.value),
 							width : this.scale.calculateBarWidth(this.datasets.length)
 						}, easingDecimal).draw();
 					}
 				},this);

 			},this);
 		}
 	});


 }).call(this);

 (function(){
 	"use strict";

 	var root = this,
 		Chart = root.Chart,
 		//Cache a local reference to Chart.helpers
 		helpers = Chart.helpers;

 	var defaultConfig = {
 		//Boolean - Whether we should show a stroke on each segment
 		segmentShowStroke : true,

 		//String - The colour of each segment stroke
 		segmentStrokeColor : "#fff",

 		//Number - The width of each segment stroke
 		segmentStrokeWidth : 2,

 		//The percentage of the chart that we cut out of the middle.
 		percentageInnerCutout : 50,

 		//Number - The angle to start the first segment stroke
 		rotation: 0,
 		
 		//Number - Amount of animation steps
 		animationSteps : 100,

 		//String - Animation easing effect
 		animationEasing : "easeOutBounce",

 		//Boolean - Whether we animate the rotation of the Doughnut
 		animateRotate : true,

 		//Boolean - Whether we animate scaling the Doughnut from the centre
 		animateScale : false,

 		//String - A legend template
 		legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<segments.length; i++){%><li><span style=\"background-color:<%=segments[i].fillColor%>\"></span><%if(segments[i].label){%><%=segments[i].label%><%}%></li><%}%></ul>"

 	};


 	Chart.Type.extend({
 		//Passing in a name registers this chart in the Chart namespace
 		name: "Doughnut",
 		//Providing a defaults will also register the deafults in the chart namespace
 		defaults : defaultConfig,
 		//Initialize is fired when the chart is initialized - Data is passed in as a parameter
 		//Config is automatically merged by the core of Chart.js, and is available at this.options
 		initialize:  function(data){

 			//Declare segments as a static property to prevent inheriting across the Chart type prototype
 			this.segments = [];
 			this.outerRadius = (helpers.min([this.chart.width,this.chart.height]) -	this.options.segmentStrokeWidth/2)/2;

 			this.SegmentArc = Chart.Arc.extend({
 				ctx : this.chart.ctx,
 				x : this.chart.width/2,
 				y : this.chart.height/2
 			});
 			
 			//Set up tooltip events on the chart
 			if (this.options.showTooltips){
 				helpers.bindEvents(this, this.options.tooltipEvents, function(evt){
 					var activeSegments = (evt.type !== 'mouseout') ? this.getSegmentsAtEvent(evt) : [];

 					helpers.each(this.segments,function(segment){
 						segment.restore(["fillColor"]);
 					});
 					helpers.each(activeSegments,function(activeSegment){
 						activeSegment.fillColor = activeSegment.highlightColor;
 					});
 					this.showTooltip(activeSegments);
 				});
 			}
 			this.calculateTotal(data);

 			helpers.each(data,function(datapoint, index){
 				this.addData(datapoint, index, true);
 			},this);

 			this.render();
 		},
 		getSegmentsAtEvent : function(e){
 			var segmentsArray = [];

 			var location = helpers.getRelativePosition(e);

 			helpers.each(this.segments,function(segment){
 				if (segment.inRange(location.x,location.y)) segmentsArray.push(segment);
 			},this);
 			return segmentsArray;
 		},
 		addData : function(segment, atIndex, silent){
 			var index = atIndex || this.segments.length;
 			this.segments.splice(index, 0, new this.SegmentArc({
 				value : segment.value,
 				outerRadius : (this.options.animateScale) ? 0 : this.outerRadius,
 				innerRadius : (this.options.animateScale) ? 0 : (this.outerRadius/100) * this.options.percentageInnerCutout,
 				fillColor : segment.color,
 				highlightColor : segment.highlight || segment.color,
 				showStroke : this.options.segmentShowStroke,
 				strokeWidth : this.options.segmentStrokeWidth,
 				strokeColor : this.options.segmentStrokeColor,
 				startAngle : Math.PI * 1.5,
 				circumference : (this.options.animateRotate) ? 0 : this.calculateCircumference(segment.value),
 				label : segment.label
 			}));
 			if (!silent){
 				this.reflow();
 				this.update();
 			}
 		},
 		calculateCircumference : function(value){
 			return (Math.PI*2)*(Math.abs(value) / this.total);
 		},
 		calculateTotal : function(data){
 			this.total = 0;
 			helpers.each(data,function(segment){
 				this.total += Math.abs(segment.value);
 			},this);
 		},
 		update : function(){
 			this.calculateTotal(this.segments);

 			// Reset any highlight colours before updating.
 			helpers.each(this.activeElements, function(activeElement){
 				activeElement.restore(['fillColor']);
 			});

 			helpers.each(this.segments,function(segment){
 				segment.save();
 			});
 			this.render();
 		},

 		removeData: function(atIndex){
 			var indexToDelete = (helpers.isNumber(atIndex)) ? atIndex : this.segments.length-1;
 			this.segments.splice(indexToDelete, 1);
 			this.reflow();
 			this.update();
 		},

 		reflow : function(){
 			helpers.extend(this.SegmentArc.prototype,{
 				x : this.chart.width/2,
 				y : this.chart.height/2
 			});
 			this.outerRadius = (helpers.min([this.chart.width,this.chart.height]) -	this.options.segmentStrokeWidth/2)/2;
 			helpers.each(this.segments, function(segment){
 				segment.update({
 					outerRadius : this.outerRadius,
 					innerRadius : (this.outerRadius/100) * this.options.percentageInnerCutout
 				});
 			}, this);
 		},
 		draw : function(easeDecimal){
 			var animDecimal = (easeDecimal) ? easeDecimal : 1;
 			this.clear();
 			helpers.each(this.segments,function(segment,index){
 				segment.transition({
 					circumference : this.calculateCircumference(segment.value),
 					outerRadius : this.outerRadius,
 					innerRadius : (this.outerRadius/100) * this.options.percentageInnerCutout
 				},animDecimal);

 				if (index === 0){
 					segment.startAngle = (this.options.rotation-90) * Math.PI / 180;
 				}
 				segment.endAngle = segment.startAngle + segment.circumference;

 				segment.draw();
 				//Check to see if it's the last segment, if not get the next and update the start angle
 				if (index < this.segments.length-1){
 					this.segments[index+1].startAngle = segment.endAngle;
 				}
 			},this);

 		}
 	});

 	Chart.types.Doughnut.extend({
 		name : "Pie",
 		defaults : helpers.merge(defaultConfig,{percentageInnerCutout : 0})
 	});

 }).call(this);
 (function(){
 	"use strict";

 	var root = this,
 		Chart = root.Chart,
 		helpers = Chart.helpers;

 	var defaultConfig = {

 		///Boolean - Whether grid lines are shown across the chart
 		scaleShowGridLines : true,

 		//String - Colour of the grid lines
 		scaleGridLineColor : "rgba(0,0,0,.05)",

 		//Number - Width of the grid lines
 		scaleGridLineWidth : 1,

 		//Boolean - Whether to show horizontal lines (except X axis)
 		scaleShowHorizontalLines: true,

 		//Boolean - Whether to show vertical lines (except Y axis)
 		scaleShowVerticalLines: true,

 		//Boolean - Whether the line is curved between points
 		bezierCurve : true,

 		//Number - Tension of the bezier curve between points
 		bezierCurveTension : 0.4,

 		//Boolean - Whether to show a dot for each point
 		pointDot : true,

 		//Number - Radius of each point dot in pixels
 		pointDotRadius : 4,

 		//Number - Pixel width of point dot stroke
 		pointDotStrokeWidth : 1,

 		//Number - amount extra to add to the radius to cater for hit detection outside the drawn point
 		pointHitDetectionRadius : 20,

 		//Boolean - Whether to show a stroke for datasets
 		datasetStroke : true,

 		//Number - Pixel width of dataset stroke
 		datasetStrokeWidth : 2,

 		//Boolean - Whether to fill the dataset with a colour
 		datasetFill : true,

 		//String - A legend template
 		legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span style=\"background-color:<%=datasets[i].strokeColor%>\"></span><%if(datasets[i].label){%><%=datasets[i].label%><%}%></li><%}%></ul>"

 	};


 	Chart.Type.extend({
 		name: "Line",
 		defaults : defaultConfig,
 		initialize:  function(data){
 			//Declare the extension of the default point, to cater for the options passed in to the constructor
 			this.PointClass = Chart.Point.extend({
 				strokeWidth : this.options.pointDotStrokeWidth,
 				radius : this.options.pointDotRadius,
 				display: this.options.pointDot,
 				hitDetectionRadius : this.options.pointHitDetectionRadius,
 				ctx : this.chart.ctx,
 				inRange : function(mouseX){
 					return (Math.pow(mouseX-this.x, 2) < Math.pow(this.radius + this.hitDetectionRadius,2));
 				}
 			});

 			this.datasets = [];

 			//Set up tooltip events on the chart
 			if (this.options.showTooltips){
 				helpers.bindEvents(this, this.options.tooltipEvents, function(evt){
 					var activePoints = (evt.type !== 'mouseout') ? this.getPointsAtEvent(evt) : [];
 					this.eachPoints(function(point){
 						point.restore(['fillColor', 'strokeColor']);
 					});
 					helpers.each(activePoints, function(activePoint){
 						activePoint.fillColor = activePoint.highlightFill;
 						activePoint.strokeColor = activePoint.highlightStroke;
 					});
 					this.showTooltip(activePoints);
 				});
 			}

 			//Iterate through each of the datasets, and build this into a property of the chart
 			helpers.each(data.datasets,function(dataset){

 				var datasetObject = {
 					label : dataset.label || null,
 					fillColor : dataset.fillColor,
 					strokeColor : dataset.strokeColor,
 					pointColor : dataset.pointColor,
 					pointStrokeColor : dataset.pointStrokeColor,
 					points : []
 				};

 				this.datasets.push(datasetObject);


 				helpers.each(dataset.data,function(dataPoint,index){
 					//Add a new point for each piece of data, passing any required data to draw.
 					datasetObject.points.push(new this.PointClass({
 						value : dataPoint,
 						label : data.labels[index],
 						datasetLabel: dataset.label,
 						strokeColor : dataset.pointStrokeColor,
 						fillColor : dataset.pointColor,
 						highlightFill : dataset.pointHighlightFill || dataset.pointColor,
 						highlightStroke : dataset.pointHighlightStroke || dataset.pointStrokeColor
 					}));
 				},this);

 				this.buildScale(data.labels);


 				this.eachPoints(function(point, index){
 					helpers.extend(point, {
 						x: this.scale.calculateX(index),
 						y: this.scale.endPoint
 					});
 					point.save();
 				}, this);

 			},this);


 			this.render();
 		},
 		update : function(){
 			this.scale.update();
 			// Reset any highlight colours before updating.
 			helpers.each(this.activeElements, function(activeElement){
 				activeElement.restore(['fillColor', 'strokeColor']);
 			});
 			this.eachPoints(function(point){
 				point.save();
 			});
 			this.render();
 		},
 		eachPoints : function(callback){
 			helpers.each(this.datasets,function(dataset){
 				helpers.each(dataset.points,callback,this);
 			},this);
 		},
 		getPointsAtEvent : function(e){
 			var pointsArray = [],
 				eventPosition = helpers.getRelativePosition(e);
 			helpers.each(this.datasets,function(dataset){
 				helpers.each(dataset.points,function(point){
 					if (point.inRange(eventPosition.x,eventPosition.y)) pointsArray.push(point);
 				});
 			},this);
 			return pointsArray;
 		},
 		buildScale : function(labels){
 			var self = this;

 			var dataTotal = function(){
 				var values = [];
 				self.eachPoints(function(point){
 					values.push(point.value);
 				});

 				return values;
 			};

 			var scaleOptions = {
 				templateString : this.options.scaleLabel,
 				height : this.chart.height,
 				width : this.chart.width,
 				ctx : this.chart.ctx,
 				textColor : this.options.scaleFontColor,
 				fontSize : this.options.scaleFontSize,
 				fontStyle : this.options.scaleFontStyle,
 				fontFamily : this.options.scaleFontFamily,
 				valuesCount : labels.length,
 				beginAtZero : this.options.scaleBeginAtZero,
 				integersOnly : this.options.scaleIntegersOnly,
 				calculateYRange : function(currentHeight){
 					var updatedRanges = helpers.calculateScaleRange(
 						dataTotal(),
 						currentHeight,
 						this.fontSize,
 						this.beginAtZero,
 						this.integersOnly
 					);
 					helpers.extend(this, updatedRanges);
 				},
 				xLabels : labels,
 				font : helpers.fontString(this.options.scaleFontSize, this.options.scaleFontStyle, this.options.scaleFontFamily),
 				lineWidth : this.options.scaleLineWidth,
 				lineColor : this.options.scaleLineColor,
 				showHorizontalLines : this.options.scaleShowHorizontalLines,
 				showVerticalLines : this.options.scaleShowVerticalLines,
 				gridLineWidth : (this.options.scaleShowGridLines) ? this.options.scaleGridLineWidth : 0,
 				gridLineColor : (this.options.scaleShowGridLines) ? this.options.scaleGridLineColor : "rgba(0,0,0,0)",
 				padding: (this.options.showScale) ? 0 : this.options.pointDotRadius + this.options.pointDotStrokeWidth,
 				showLabels : this.options.scaleShowLabels,
 				display : this.options.showScale
 			};

 			if (this.options.scaleOverride){
 				helpers.extend(scaleOptions, {
 					calculateYRange: helpers.noop,
 					steps: this.options.scaleSteps,
 					stepValue: this.options.scaleStepWidth,
 					min: this.options.scaleStartValue,
 					max: this.options.scaleStartValue + (this.options.scaleSteps * this.options.scaleStepWidth)
 				});
 			}


 			this.scale = new Chart.Scale(scaleOptions);
 		},
 		addData : function(valuesArray,label){
 			//Map the values array for each of the datasets

 			helpers.each(valuesArray,function(value,datasetIndex){
 				//Add a new point for each piece of data, passing any required data to draw.
 				this.datasets[datasetIndex].points.push(new this.PointClass({
 					value : value,
 					label : label,
 					x: this.scale.calculateX(this.scale.valuesCount+1),
 					y: this.scale.endPoint,
 					strokeColor : this.datasets[datasetIndex].pointStrokeColor,
 					fillColor : this.datasets[datasetIndex].pointColor
 				}));
 			},this);

 			this.scale.addXLabel(label);
 			//Then re-render the chart.
 			this.update();
 		},
 		removeData : function(){
 			this.scale.removeXLabel();
 			//Then re-render the chart.
 			helpers.each(this.datasets,function(dataset){
 				dataset.points.shift();
 			},this);
 			this.update();
 		},
 		reflow : function(){
 			var newScaleProps = helpers.extend({
 				height : this.chart.height,
 				width : this.chart.width
 			});
 			this.scale.update(newScaleProps);
 		},
 		draw : function(ease){
 			var easingDecimal = ease || 1;
 			this.clear();

 			var ctx = this.chart.ctx;

 			// Some helper methods for getting the next/prev points
 			var hasValue = function(item){
 				return item.value !== null;
 			},
 			nextPoint = function(point, collection, index){
 				return helpers.findNextWhere(collection, hasValue, index) || point;
 			},
 			previousPoint = function(point, collection, index){
 				return helpers.findPreviousWhere(collection, hasValue, index) || point;
 			};

 			this.scale.draw(easingDecimal);


 			helpers.each(this.datasets,function(dataset){
 				var pointsWithValues = helpers.where(dataset.points, hasValue);

 				//Transition each point first so that the line and point drawing isn't out of sync
 				//We can use this extra loop to calculate the control points of this dataset also in this loop

 				helpers.each(dataset.points, function(point, index){
 					if (point.hasValue()){
 						point.transition({
 							y : this.scale.calculateY(point.value),
 							x : this.scale.calculateX(index)
 						}, easingDecimal);
 					}
 				},this);


 				// Control points need to be calculated in a seperate loop, because we need to know the current x/y of the point
 				// This would cause issues when there is no animation, because the y of the next point would be 0, so beziers would be skewed
 				if (this.options.bezierCurve){
 					helpers.each(pointsWithValues, function(point, index){
 						var tension = (index > 0 && index < pointsWithValues.length - 1) ? this.options.bezierCurveTension : 0;
 						point.controlPoints = helpers.splineCurve(
 							previousPoint(point, pointsWithValues, index),
 							point,
 							nextPoint(point, pointsWithValues, index),
 							tension
 						);

 						// Prevent the bezier going outside of the bounds of the graph

 						// Cap puter bezier handles to the upper/lower scale bounds
 						if (point.controlPoints.outer.y > this.scale.endPoint){
 							point.controlPoints.outer.y = this.scale.endPoint;
 						}
 						else if (point.controlPoints.outer.y < this.scale.startPoint){
 							point.controlPoints.outer.y = this.scale.startPoint;
 						}

 						// Cap inner bezier handles to the upper/lower scale bounds
 						if (point.controlPoints.inner.y > this.scale.endPoint){
 							point.controlPoints.inner.y = this.scale.endPoint;
 						}
 						else if (point.controlPoints.inner.y < this.scale.startPoint){
 							point.controlPoints.inner.y = this.scale.startPoint;
 						}
 					},this);
 				}


 				//Draw the line between all the points
 				ctx.lineWidth = this.options.datasetStrokeWidth;
 				ctx.strokeStyle = dataset.strokeColor;
 				ctx.beginPath();

 				helpers.each(pointsWithValues, function(point, index){
 					if (index === 0){
 						ctx.moveTo(point.x, point.y);
 					}
 					else{
 						if(this.options.bezierCurve){
 							var previous = previousPoint(point, pointsWithValues, index);

 							ctx.bezierCurveTo(
 								previous.controlPoints.outer.x,
 								previous.controlPoints.outer.y,
 								point.controlPoints.inner.x,
 								point.controlPoints.inner.y,
 								point.x,
 								point.y
 							);
 						}
 						else{
 							ctx.lineTo(point.x,point.y);
 						}
 					}
 				}, this);

 				ctx.stroke();

 				if (this.options.datasetFill && pointsWithValues.length > 0){
 					//Round off the line by going to the base of the chart, back to the start, then fill.
 					ctx.lineTo(pointsWithValues[pointsWithValues.length - 1].x, this.scale.endPoint);
 					ctx.lineTo(pointsWithValues[0].x, this.scale.endPoint);
 					ctx.fillStyle = dataset.fillColor;
 					ctx.closePath();
 					ctx.fill();
 				}

 				//Now draw the points over the line
 				//A little inefficient double looping, but better than the line
 				//lagging behind the point positions
 				helpers.each(pointsWithValues,function(point){
 					point.draw();
 				});
 			},this);
 		}
 	});


 }).call(this);

 (function(){
 	"use strict";

 	var root = this,
 		Chart = root.Chart,
 		//Cache a local reference to Chart.helpers
 		helpers = Chart.helpers;

 	var defaultConfig = {
 		//Boolean - Show a backdrop to the scale label
 		scaleShowLabelBackdrop : true,

 		//String - The colour of the label backdrop
 		scaleBackdropColor : "rgba(255,255,255,0.75)",

 		// Boolean - Whether the scale should begin at zero
 		scaleBeginAtZero : true,

 		//Number - The backdrop padding above & below the label in pixels
 		scaleBackdropPaddingY : 2,

 		//Number - The backdrop padding to the side of the label in pixels
 		scaleBackdropPaddingX : 2,

 		//Boolean - Show line for each value in the scale
 		scaleShowLine : true,

 		//Boolean - Stroke a line around each segment in the chart
 		segmentShowStroke : true,

 		//String - The colour of the stroke on each segement.
 		segmentStrokeColor : "#fff",

 		//Number - The width of the stroke value in pixels
 		segmentStrokeWidth : 2,

 		//Number - Amount of animation steps
 		animationSteps : 100,

 		//String - Animation easing effect.
 		animationEasing : "easeOutBounce",

 		//Boolean - Whether to animate the rotation of the chart
 		animateRotate : true,

 		//Boolean - Whether to animate scaling the chart from the centre
 		animateScale : false,

 		//String - A legend template
 		legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<segments.length; i++){%><li><span style=\"background-color:<%=segments[i].fillColor%>\"></span><%if(segments[i].label){%><%=segments[i].label%><%}%></li><%}%></ul>"
 	};


 	Chart.Type.extend({
 		//Passing in a name registers this chart in the Chart namespace
 		name: "PolarArea",
 		//Providing a defaults will also register the deafults in the chart namespace
 		defaults : defaultConfig,
 		//Initialize is fired when the chart is initialized - Data is passed in as a parameter
 		//Config is automatically merged by the core of Chart.js, and is available at this.options
 		initialize:  function(data){
 			this.segments = [];
 			//Declare segment class as a chart instance specific class, so it can share props for this instance
 			this.SegmentArc = Chart.Arc.extend({
 				showStroke : this.options.segmentShowStroke,
 				strokeWidth : this.options.segmentStrokeWidth,
 				strokeColor : this.options.segmentStrokeColor,
 				ctx : this.chart.ctx,
 				innerRadius : 0,
 				x : this.chart.width/2,
 				y : this.chart.height/2
 			});
 			this.scale = new Chart.RadialScale({
 				display: this.options.showScale,
 				fontStyle: this.options.scaleFontStyle,
 				fontSize: this.options.scaleFontSize,
 				fontFamily: this.options.scaleFontFamily,
 				fontColor: this.options.scaleFontColor,
 				showLabels: this.options.scaleShowLabels,
 				showLabelBackdrop: this.options.scaleShowLabelBackdrop,
 				backdropColor: this.options.scaleBackdropColor,
 				backdropPaddingY : this.options.scaleBackdropPaddingY,
 				backdropPaddingX: this.options.scaleBackdropPaddingX,
 				lineWidth: (this.options.scaleShowLine) ? this.options.scaleLineWidth : 0,
 				lineColor: this.options.scaleLineColor,
 				lineArc: true,
 				width: this.chart.width,
 				height: this.chart.height,
 				xCenter: this.chart.width/2,
 				yCenter: this.chart.height/2,
 				ctx : this.chart.ctx,
 				templateString: this.options.scaleLabel,
 				valuesCount: data.length
 			});

 			this.updateScaleRange(data);

 			this.scale.update();

 			helpers.each(data,function(segment,index){
 				this.addData(segment,index,true);
 			},this);

 			//Set up tooltip events on the chart
 			if (this.options.showTooltips){
 				helpers.bindEvents(this, this.options.tooltipEvents, function(evt){
 					var activeSegments = (evt.type !== 'mouseout') ? this.getSegmentsAtEvent(evt) : [];
 					helpers.each(this.segments,function(segment){
 						segment.restore(["fillColor"]);
 					});
 					helpers.each(activeSegments,function(activeSegment){
 						activeSegment.fillColor = activeSegment.highlightColor;
 					});
 					this.showTooltip(activeSegments);
 				});
 			}

 			this.render();
 		},
 		getSegmentsAtEvent : function(e){
 			var segmentsArray = [];

 			var location = helpers.getRelativePosition(e);

 			helpers.each(this.segments,function(segment){
 				if (segment.inRange(location.x,location.y)) segmentsArray.push(segment);
 			},this);
 			return segmentsArray;
 		},
 		addData : function(segment, atIndex, silent){
 			var index = atIndex || this.segments.length;

 			this.segments.splice(index, 0, new this.SegmentArc({
 				fillColor: segment.color,
 				highlightColor: segment.highlight || segment.color,
 				label: segment.label,
 				value: segment.value,
 				outerRadius: (this.options.animateScale) ? 0 : this.scale.calculateCenterOffset(segment.value),
 				circumference: (this.options.animateRotate) ? 0 : this.scale.getCircumference(),
 				startAngle: Math.PI * 1.5
 			}));
 			if (!silent){
 				this.reflow();
 				this.update();
 			}
 		},
 		removeData: function(atIndex){
 			var indexToDelete = (helpers.isNumber(atIndex)) ? atIndex : this.segments.length-1;
 			this.segments.splice(indexToDelete, 1);
 			this.reflow();
 			this.update();
 		},
 		calculateTotal: function(data){
 			this.total = 0;
 			helpers.each(data,function(segment){
 				this.total += segment.value;
 			},this);
 			this.scale.valuesCount = this.segments.length;
 		},
 		updateScaleRange: function(datapoints){
 			var valuesArray = [];
 			helpers.each(datapoints,function(segment){
 				valuesArray.push(segment.value);
 			});

 			var scaleSizes = (this.options.scaleOverride) ?
 				{
 					steps: this.options.scaleSteps,
 					stepValue: this.options.scaleStepWidth,
 					min: this.options.scaleStartValue,
 					max: this.options.scaleStartValue + (this.options.scaleSteps * this.options.scaleStepWidth)
 				} :
 				helpers.calculateScaleRange(
 					valuesArray,
 					helpers.min([this.chart.width, this.chart.height])/2,
 					this.options.scaleFontSize,
 					this.options.scaleBeginAtZero,
 					this.options.scaleIntegersOnly
 				);

 			helpers.extend(
 				this.scale,
 				scaleSizes,
 				{
 					size: helpers.min([this.chart.width, this.chart.height]),
 					xCenter: this.chart.width/2,
 					yCenter: this.chart.height/2
 				}
 			);

 		},
 		update : function(){
 			this.calculateTotal(this.segments);

 			helpers.each(this.segments,function(segment){
 				segment.save();
 			});
 			
 			this.reflow();
 			this.render();
 		},
 		reflow : function(){
 			helpers.extend(this.SegmentArc.prototype,{
 				x : this.chart.width/2,
 				y : this.chart.height/2
 			});
 			this.updateScaleRange(this.segments);
 			this.scale.update();

 			helpers.extend(this.scale,{
 				xCenter: this.chart.width/2,
 				yCenter: this.chart.height/2
 			});

 			helpers.each(this.segments, function(segment){
 				segment.update({
 					outerRadius : this.scale.calculateCenterOffset(segment.value)
 				});
 			}, this);

 		},
 		draw : function(ease){
 			var easingDecimal = ease || 1;
 			//Clear & draw the canvas
 			this.clear();
 			helpers.each(this.segments,function(segment, index){
 				segment.transition({
 					circumference : this.scale.getCircumference(),
 					outerRadius : this.scale.calculateCenterOffset(segment.value)
 				},easingDecimal);

 				segment.endAngle = segment.startAngle + segment.circumference;

 				// If we've removed the first segment we need to set the first one to
 				// start at the top.
 				if (index === 0){
 					segment.startAngle = Math.PI * 1.5;
 				}

 				//Check to see if it's the last segment, if not get the next and update the start angle
 				if (index < this.segments.length - 1){
 					this.segments[index+1].startAngle = segment.endAngle;
 				}
 				segment.draw();
 			}, this);
 			this.scale.draw();
 		}
 	});

 }).call(this);
 (function(){
 	"use strict";

 	var root = this,
 		Chart = root.Chart,
 		helpers = Chart.helpers;



 	Chart.Type.extend({
 		name: "Radar",
 		defaults:{
 			//Boolean - Whether to show lines for each scale point
 			scaleShowLine : true,

 			//Boolean - Whether we show the angle lines out of the radar
 			angleShowLineOut : true,

 			//Boolean - Whether to show labels on the scale
 			scaleShowLabels : false,

 			// Boolean - Whether the scale should begin at zero
 			scaleBeginAtZero : true,

 			//String - Colour of the angle line
 			angleLineColor : "rgba(0,0,0,.1)",

 			//Number - Pixel width of the angle line
 			angleLineWidth : 1,

 			//String - Point label font declaration
 			pointLabelFontFamily : "'Arial'",

 			//String - Point label font weight
 			pointLabelFontStyle : "normal",

 			//Number - Point label font size in pixels
 			pointLabelFontSize : 10,

 			//String - Point label font colour
 			pointLabelFontColor : "#666",

 			//Boolean - Whether to show a dot for each point
 			pointDot : true,

 			//Number - Radius of each point dot in pixels
 			pointDotRadius : 3,

 			//Number - Pixel width of point dot stroke
 			pointDotStrokeWidth : 1,

 			//Number - amount extra to add to the radius to cater for hit detection outside the drawn point
 			pointHitDetectionRadius : 20,

 			//Boolean - Whether to show a stroke for datasets
 			datasetStroke : true,

 			//Number - Pixel width of dataset stroke
 			datasetStrokeWidth : 2,

 			//Boolean - Whether to fill the dataset with a colour
 			datasetFill : true,

 			//String - A legend template
 			legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span style=\"background-color:<%=datasets[i].strokeColor%>\"></span><%if(datasets[i].label){%><%=datasets[i].label%><%}%></li><%}%></ul>"

 		},

 		initialize: function(data){
 			this.PointClass = Chart.Point.extend({
 				strokeWidth : this.options.pointDotStrokeWidth,
 				radius : this.options.pointDotRadius,
 				display: this.options.pointDot,
 				hitDetectionRadius : this.options.pointHitDetectionRadius,
 				ctx : this.chart.ctx
 			});

 			this.datasets = [];

 			this.buildScale(data);

 			//Set up tooltip events on the chart
 			if (this.options.showTooltips){
 				helpers.bindEvents(this, this.options.tooltipEvents, function(evt){
 					var activePointsCollection = (evt.type !== 'mouseout') ? this.getPointsAtEvent(evt) : [];

 					this.eachPoints(function(point){
 						point.restore(['fillColor', 'strokeColor']);
 					});
 					helpers.each(activePointsCollection, function(activePoint){
 						activePoint.fillColor = activePoint.highlightFill;
 						activePoint.strokeColor = activePoint.highlightStroke;
 					});

 					this.showTooltip(activePointsCollection);
 				});
 			}

 			//Iterate through each of the datasets, and build this into a property of the chart
 			helpers.each(data.datasets,function(dataset){

 				var datasetObject = {
 					label: dataset.label || null,
 					fillColor : dataset.fillColor,
 					strokeColor : dataset.strokeColor,
 					pointColor : dataset.pointColor,
 					pointStrokeColor : dataset.pointStrokeColor,
 					points : []
 				};

 				this.datasets.push(datasetObject);

 				helpers.each(dataset.data,function(dataPoint,index){
 					//Add a new point for each piece of data, passing any required data to draw.
 					var pointPosition;
 					if (!this.scale.animation){
 						pointPosition = this.scale.getPointPosition(index, this.scale.calculateCenterOffset(dataPoint));
 					}
 					datasetObject.points.push(new this.PointClass({
 						value : dataPoint,
 						label : data.labels[index],
 						datasetLabel: dataset.label,
 						x: (this.options.animation) ? this.scale.xCenter : pointPosition.x,
 						y: (this.options.animation) ? this.scale.yCenter : pointPosition.y,
 						strokeColor : dataset.pointStrokeColor,
 						fillColor : dataset.pointColor,
 						highlightFill : dataset.pointHighlightFill || dataset.pointColor,
 						highlightStroke : dataset.pointHighlightStroke || dataset.pointStrokeColor
 					}));
 				},this);

 			},this);

 			this.render();
 		},
 		eachPoints : function(callback){
 			helpers.each(this.datasets,function(dataset){
 				helpers.each(dataset.points,callback,this);
 			},this);
 		},

 		getPointsAtEvent : function(evt){
 			var mousePosition = helpers.getRelativePosition(evt),
 				fromCenter = helpers.getAngleFromPoint({
 					x: this.scale.xCenter,
 					y: this.scale.yCenter
 				}, mousePosition);

 			var anglePerIndex = (Math.PI * 2) /this.scale.valuesCount,
 				pointIndex = Math.round((fromCenter.angle - Math.PI * 1.5) / anglePerIndex),
 				activePointsCollection = [];

 			// If we're at the top, make the pointIndex 0 to get the first of the array.
 			if (pointIndex >= this.scale.valuesCount || pointIndex < 0){
 				pointIndex = 0;
 			}

 			if (fromCenter.distance <= this.scale.drawingArea){
 				helpers.each(this.datasets, function(dataset){
 					activePointsCollection.push(dataset.points[pointIndex]);
 				});
 			}

 			return activePointsCollection;
 		},

 		buildScale : function(data){
 			this.scale = new Chart.RadialScale({
 				display: this.options.showScale,
 				fontStyle: this.options.scaleFontStyle,
 				fontSize: this.options.scaleFontSize,
 				fontFamily: this.options.scaleFontFamily,
 				fontColor: this.options.scaleFontColor,
 				showLabels: this.options.scaleShowLabels,
 				showLabelBackdrop: this.options.scaleShowLabelBackdrop,
 				backdropColor: this.options.scaleBackdropColor,
 				backdropPaddingY : this.options.scaleBackdropPaddingY,
 				backdropPaddingX: this.options.scaleBackdropPaddingX,
 				lineWidth: (this.options.scaleShowLine) ? this.options.scaleLineWidth : 0,
 				lineColor: this.options.scaleLineColor,
 				angleLineColor : this.options.angleLineColor,
 				angleLineWidth : (this.options.angleShowLineOut) ? this.options.angleLineWidth : 0,
 				// Point labels at the edge of each line
 				pointLabelFontColor : this.options.pointLabelFontColor,
 				pointLabelFontSize : this.options.pointLabelFontSize,
 				pointLabelFontFamily : this.options.pointLabelFontFamily,
 				pointLabelFontStyle : this.options.pointLabelFontStyle,
 				height : this.chart.height,
 				width: this.chart.width,
 				xCenter: this.chart.width/2,
 				yCenter: this.chart.height/2,
 				ctx : this.chart.ctx,
 				templateString: this.options.scaleLabel,
 				labels: data.labels,
 				valuesCount: data.datasets[0].data.length
 			});

 			this.scale.setScaleSize();
 			this.updateScaleRange(data.datasets);
 			this.scale.buildYLabels();
 		},
 		updateScaleRange: function(datasets){
 			var valuesArray = (function(){
 				var totalDataArray = [];
 				helpers.each(datasets,function(dataset){
 					if (dataset.data){
 						totalDataArray = totalDataArray.concat(dataset.data);
 					}
 					else {
 						helpers.each(dataset.points, function(point){
 							totalDataArray.push(point.value);
 						});
 					}
 				});
 				return totalDataArray;
 			})();


 			var scaleSizes = (this.options.scaleOverride) ?
 				{
 					steps: this.options.scaleSteps,
 					stepValue: this.options.scaleStepWidth,
 					min: this.options.scaleStartValue,
 					max: this.options.scaleStartValue + (this.options.scaleSteps * this.options.scaleStepWidth)
 				} :
 				helpers.calculateScaleRange(
 					valuesArray,
 					helpers.min([this.chart.width, this.chart.height])/2,
 					this.options.scaleFontSize,
 					this.options.scaleBeginAtZero,
 					this.options.scaleIntegersOnly
 				);

 			helpers.extend(
 				this.scale,
 				scaleSizes
 			);

 		},
 		addData : function(valuesArray,label){
 			//Map the values array for each of the datasets
 			this.scale.valuesCount++;
 			helpers.each(valuesArray,function(value,datasetIndex){
 				var pointPosition = this.scale.getPointPosition(this.scale.valuesCount, this.scale.calculateCenterOffset(value));
 				this.datasets[datasetIndex].points.push(new this.PointClass({
 					value : value,
 					label : label,
 					x: pointPosition.x,
 					y: pointPosition.y,
 					strokeColor : this.datasets[datasetIndex].pointStrokeColor,
 					fillColor : this.datasets[datasetIndex].pointColor
 				}));
 			},this);

 			this.scale.labels.push(label);

 			this.reflow();

 			this.update();
 		},
 		removeData : function(){
 			this.scale.valuesCount--;
 			this.scale.labels.shift();
 			helpers.each(this.datasets,function(dataset){
 				dataset.points.shift();
 			},this);
 			this.reflow();
 			this.update();
 		},
 		update : function(){
 			this.eachPoints(function(point){
 				point.save();
 			});
 			this.reflow();
 			this.render();
 		},
 		reflow: function(){
 			helpers.extend(this.scale, {
 				width : this.chart.width,
 				height: this.chart.height,
 				size : helpers.min([this.chart.width, this.chart.height]),
 				xCenter: this.chart.width/2,
 				yCenter: this.chart.height/2
 			});
 			this.updateScaleRange(this.datasets);
 			this.scale.setScaleSize();
 			this.scale.buildYLabels();
 		},
 		draw : function(ease){
 			var easeDecimal = ease || 1,
 				ctx = this.chart.ctx;
 			this.clear();
 			this.scale.draw();

 			helpers.each(this.datasets,function(dataset){

 				//Transition each point first so that the line and point drawing isn't out of sync
 				helpers.each(dataset.points,function(point,index){
 					if (point.hasValue()){
 						point.transition(this.scale.getPointPosition(index, this.scale.calculateCenterOffset(point.value)), easeDecimal);
 					}
 				},this);



 				//Draw the line between all the points
 				ctx.lineWidth = this.options.datasetStrokeWidth;
 				ctx.strokeStyle = dataset.strokeColor;
 				ctx.beginPath();
 				helpers.each(dataset.points,function(point,index){
 					if (index === 0){
 						ctx.moveTo(point.x,point.y);
 					}
 					else{
 						ctx.lineTo(point.x,point.y);
 					}
 				},this);
 				ctx.closePath();
 				ctx.stroke();

 				ctx.fillStyle = dataset.fillColor;
 				ctx.fill();

 				//Now draw the points over the line
 				//A little inefficient double looping, but better than the line
 				//lagging behind the point positions
 				helpers.each(dataset.points,function(point){
 					if (point.hasValue()){
 						point.draw();
 					}
 				});

 			},this);

 		}

 	});





 }).call(this);
	<!doctype html>
	<html>
	<head>
	<title>Doughnut Chart</title>

	<style>
	body{
	padding: 0;
	margin: 0;
	}
	#canvas-holder{
	width:30%;
	}
	</style>
	</head>
	<body>
	<div id="canvas-holder">
	<canvas id="chart-area" width="500" height="500"/>
	</div>


	<script>

	var doughnutData = [
	{
	value: 300,
	color:"#F7464A",
	highlight: "#FF5A5E",
	label: "Red"
	},
	{
	value: 50,
	color: "#46BFBD",
	highlight: "#5AD3D1",
	label: "Green"
	},
	{
	value: 100,
	color: "#FDB45C",
	highlight: "#FFC870",
	label: "Yellow"
	},
	{
	value: 40,
	color: "#949FB1",
	highlight: "#A8B3C5",
	label: "Grey"
	},
	{
	value: 120,
	color: "#4D5360",
	highlight: "#616774",
	label: "Dark Grey"
	}

	];

	window.onload = function(){
	var ctx = document.getElementById("chart-area").getContext("2d");
	window.myDoughnut = new Chart(ctx).Doughnut(doughnutData, {responsive : true, rotation: 90});
	};



	</script>
	</body>
	</html>