/*!
 * 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') || context.canvas.width;
        var height = this.height = computeDimension(context.canvas,'Height') || context.canvas.height;

        width = this.width = context.canvas.width;
        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",

            // String - Tooltip title template
            tooltipTitleTemplate: "<%= label%>",

            // 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',

            // Array - A list of colors to use as the defaults
            segmentColorDefault: ["#A6CEE3", "#1F78B4", "#B2DF8A", "#33A02C", "#FB9A99", "#E31A1C", "#FDBF6F", "#FF7F00", "#CAB2D6", "#6A3D9A", "#B4B482", "#B15928" ],

            // Array - A list of highlight colors to use as the defaults
            segmentHighlightColorDefaults: [ "#CEF6FF", "#47A0DC", "#DAFFB2", "#5BC854", "#FFC2C1", "#FF4244", "#FFE797", "#FFA728", "#F2DAFE", "#9265C2", "#DCDCAA", "#D98150" ],

            // 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)){
                var s = num.toString();
                if(s.indexOf("e-") < 0){
                    // no exponent, e.g. 0.01
                    return s.split(".")[1].length;
                }
                else if(s.indexOf(".") < 0) {
                    // no decimal point, e.g. 1e-9
                    return parseInt(s.split("e-")[1]);
                }
                else {
                    // exponent and decimal point, e.g. 1.23e-9
                    var parts = s.split(".")[1].split("e-");
                    return parts[0].length + parseInt(parts[1]);
                }
            }
            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);

            // Filter out null values since these would min() to zero
            var values = [];
            each(valuesArray, function( v ){
                v == null || values.push( v );
            });
            var minValue = min(values),
                maxValue = max(values);

            // We need some degree of separation 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 (templateString){
                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,
                padding = parseInt(getStyle(container, 'padding-left')) + parseInt(getStyle(container, 'padding-right'));
            // TODO = check cross browser stuff with this.
            return container.clientWidth - padding;
        },
        getMaximumHeight = helpers.getMaximumHeight = function(domNode){
            var container = domNode.parentNode,
                padding = parseInt(getStyle(container, 'padding-bottom')) + parseInt(getStyle(container, 'padding-top'));
            // TODO = check cross browser stuff with this.
            return container.clientHeight - padding;
        },
        getStyle = helpers.getStyle = function (el, property) {
            return el.currentStyle ?
                el.currentStyle[property] :
                document.defaultView.getComputedStyle(el, null).getPropertyValue(property);
        },
        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
            Chart.animationService.cancelAnimation(this);
            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){
                var animation = new Chart.Animation();
                animation.numSteps = this.options.animationSteps;
                animation.easing = this.options.animationEasing;

                // render function
                animation.render = function(chartInstance, animationObject) {
                    var easingFunction = helpers.easingEffects[animationObject.easing];
                    var stepDecimal = animationObject.currentStep / animationObject.numSteps;
                    var easeDecimal = easingFunction(stepDecimal);

                    chartInstance.draw(easeDecimal, stepDecimal, animationObject.currentStep);
                };

                // user events
                animation.onAnimationProgress = this.options.onAnimationProgress;
                animation.onAnimationComplete = this.options.onAnimationComplete;

                Chart.animationService.addAnimation(this, animation);
            }
            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: template(this.options.tooltipTitleTemplate,ChartElements[0]),
                        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
            });

            // Normalize all angles to 0 - 2*PI (0 - 360°)
            var pointRelativeAngle = pointRelativePosition.angle % (Math.PI * 2),
                startAngle = (Math.PI * 2 + this.startAngle) % (Math.PI * 2),
                endAngle = (Math.PI * 2 + this.endAngle) % (Math.PI * 2) || 360;

            // Calculate wether the pointRelativeAngle is between the start and the end angle
            var betweenAngles = (endAngle < startAngle) ?
                pointRelativeAngle <= endAngle || pointRelativeAngle >= startAngle:
                pointRelativeAngle >= startAngle && pointRelativeAngle <= endAngle;

            //Check if within the range of the open/close angle
            var 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 < 0 ? 0 : this.outerRadius, this.startAngle, this.endAngle);

            ctx.arc(this.x, this.y, this.innerRadius < 0 ? 0 : 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.Animation = Chart.Element.extend({
        currentStep: null, // the current animation step
        numSteps: 60, // default number of steps
        easing: "", // the easing to use for this animation
        render: null, // render function used by the animation service

        onAnimationProgress: null, // user specified callback to fire on each step of the animation
        onAnimationComplete: null, // user specified callback to fire when the animation finishes
    });

    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.titleHeight = this.title ? this.titleFontSize * 1.5 : 0;
            this.height = (this.labels.length * this.fontSize) + ((this.labels.length-1) * (this.fontSize/2)) + (this.yPadding*2) + this.titleHeight;

            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.titleHeight / 3;
            } else{
                return baseLineHeight + ((this.fontSize * 1.5 * afterTitleIndex) + this.fontSize / 2) + this.titleHeight;
            }

        },
        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) + 10 : 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 endpoint, excluding the space for x labels
            var cachedEndPoint = this.endPoint;

            // 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.endPoint = cachedEndPoint;
                    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) ? firstWidth/2 : this.yLabelWidth;

            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){
                        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--) {
                        var centerOffset = null, outerPosition = null;

                        if (this.angleLineWidth > 0){
                            centerOffset = this.calculateCenterOffset(this.max);
                            outerPosition = this.getPointPosition(i, centerOffset);
                            ctx.beginPath();
                            ctx.moveTo(this.xCenter, this.yCenter);
                            ctx.lineTo(outerPosition.x, outerPosition.y);
                            ctx.stroke();
                            ctx.closePath();
                        }

                        if (this.backgroundColors && this.backgroundColors.length == this.valuesCount) {
                            if (centerOffset == null)
                                centerOffset = this.calculateCenterOffset(this.max);

                            if (outerPosition == null)
                                outerPosition = this.getPointPosition(i, centerOffset);

                            var previousOuterPosition = this.getPointPosition(i === 0 ? this.valuesCount - 1 : i - 1, centerOffset);
                            var nextOuterPosition = this.getPointPosition(i === this.valuesCount - 1 ? 0 : i + 1, centerOffset);

                            var previousOuterHalfway = { x: (previousOuterPosition.x + outerPosition.x) / 2, y: (previousOuterPosition.y + outerPosition.y) / 2 };
                            var nextOuterHalfway = { x: (outerPosition.x + nextOuterPosition.x) / 2, y: (outerPosition.y + nextOuterPosition.y) / 2 };

                            ctx.beginPath();
                            ctx.moveTo(this.xCenter, this.yCenter);
                            ctx.lineTo(previousOuterHalfway.x, previousOuterHalfway.y);
                            ctx.lineTo(outerPosition.x, outerPosition.y);
                            ctx.lineTo(nextOuterHalfway.x, nextOuterHalfway.y);
                            ctx.fillStyle = this.backgroundColors[i];
                            ctx.fill();
                            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);
                    }
                }
            }
        }
    });

    Chart.animationService = {
        frameDuration: 17,
        animations: [],
        dropFrames: 0,
        addAnimation: function(chartInstance, animationObject) {
            for (var index = 0; index < this.animations.length; ++ index){
                if (this.animations[index].chartInstance === chartInstance){
                    // replacing an in progress animation
                    this.animations[index].animationObject = animationObject;
                    return;
                }
            }

            this.animations.push({
                chartInstance: chartInstance,
                animationObject: animationObject
            });

            // If there are no animations queued, manually kickstart a digest, for lack of a better word
            if (this.animations.length == 1) {
                helpers.requestAnimFrame.call(window, this.digestWrapper);
            }
        },
        // Cancel the animation for a given chart instance
        cancelAnimation: function(chartInstance) {
            var index = helpers.findNextWhere(this.animations, function(animationWrapper) {
                return animationWrapper.chartInstance === chartInstance;
            });

            if (index)
            {
                this.animations.splice(index, 1);
            }
        },
        // calls startDigest with the proper context
        digestWrapper: function() {
            Chart.animationService.startDigest.call(Chart.animationService);
        },
        startDigest: function() {

            var startTime = Date.now();
            var framesToDrop = 0;

            if(this.dropFrames > 1){
                framesToDrop = Math.floor(this.dropFrames);
                this.dropFrames -= framesToDrop;
            }

            for (var i = 0; i < this.animations.length; i++) {

                if (this.animations[i].animationObject.currentStep === null){
                    this.animations[i].animationObject.currentStep = 0;
                }

                this.animations[i].animationObject.currentStep += 1 + framesToDrop;
                if(this.animations[i].animationObject.currentStep > this.animations[i].animationObject.numSteps){
                    this.animations[i].animationObject.currentStep = this.animations[i].animationObject.numSteps;
                }

                this.animations[i].animationObject.render(this.animations[i].chartInstance, this.animations[i].animationObject);

                // Check if executed the last frame.
                if (this.animations[i].animationObject.currentStep == this.animations[i].animationObject.numSteps){
                    // Call onAnimationComplete
                    this.animations[i].animationObject.onAnimationComplete.call(this.animations[i].chartInstance);
                    // Remove the animation.
                    this.animations.splice(i, 1);
                    // Keep the index in place to offset the splice
                    i--;
                }
            }

            var endTime = Date.now();
            var delay = endTime - startTime - this.frameDuration;
            var frameDelay = delay / this.frameDuration;

            if(frameDelay > 1){
                this.dropFrames += frameDelay;
            }

            // Do we have more stuff to animate?
            if (this.animations.length > 0){
                helpers.requestAnimFrame.call(window, this.digestWrapper);
            }
        }
    };

    // 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%>\"><%if(datasets[i].label){%><%=datasets[i].label%><%}%></span></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,
                    datasetLabel: this.datasets[datasetIndex].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 - 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%>\"><%if(segments[i].label){%><%=segments[i].label%><%}%></span></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){
                if (!datapoint.color) {
                    datapoint.color = 'hsl(' + (360 * index / data.length) + ', 100%, 50%)';
                }
                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 !== undefined ? atIndex : this.segments.length;
            if ( typeof(segment.color) === "undefined" ) {
                segment.color = Chart.defaults.global.segmentColorDefault[index % Chart.defaults.global.segmentColorDefault.length];
                segment.highlight = Chart.defaults.global.segmentHighlightColorDefaults[index % Chart.defaults.global.segmentHighlightColorDefaults.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) {
            if ( this.total > 0 ) {
                return (Math.PI*2)*(value / this.total);
            } else {
                return 0;
            }
        },
        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);

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

                segment.draw();
                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;
                }
            },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%>\"><%if(datasets[i].label){%><%=datasets[i].label%><%}%></span></li><%}%></ul>",

        //Boolean - Whether to horizontally center the label and point dot inside the grid
        offsetGridLines : false

    };


    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({
                offsetGridLines : this.options.offsetGridLines,
                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,
                offsetGridLines : this.options.offsetGridLines,
                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,
                    datasetLabel: this.datasets[datasetIndex].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;
            };

            if (!this.scale) return;
            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 separate 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);

                if (this.options.datasetStroke) {
                    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 segment.
        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%>\"><%if(segments[i].label){%><%=segments[i].label%><%}%></span></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%>\"><%if(datasets[i].label){%><%=datasets[i].label%><%}%></span></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,
                backgroundColors: this.options.scaleBackgroundColors,
                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,
                    datasetLabel: this.datasets[datasetIndex].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;
                if(this.options.datasetFill){
                    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);