update sources to v12.1.0

[ceph.git] / ceph / src / pybind / mgr / dashboard / static / AdminLTE-2.3.7 / plugins / chartjs / Chart.js

/*!
 * Chart.js
 * http://chartjs.org/
 * Version: 1.1.1
 *
 * 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;

                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: "<%= datasetLabel %>: <%= 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 ? container.clientWidth - padding : 0;
                },
                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 ? container.clientHeight - padding : 0;
                },
                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 helpers.template(this.options.legendTemplate, this);
                },
                destroy : function(){
                        this.stop();
                        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 && (i % this.angleLineInterval === 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('Chart', [], 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 class=\"<%=name.toLowerCase()%>-legend-icon\" style=\"background-color:<%=datasets[i].fillColor%>\"></span><span class=\"<%=name.toLowerCase()%>-legend-text\"><%if(datasets[i].label){%><%=datasets[i].label%><%}%></span></li><%}%></ul>"

        };


        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){
                                                if (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 : (typeof dataset.strokeColor == 'object') ? dataset.strokeColor[index] : dataset.strokeColor,
                                                fillColor : (typeof dataset.fillColor == 'object') ? dataset.fillColor[index] : dataset.fillColor,
                                                highlightFill : (dataset.highlightFill) ? (typeof dataset.highlightFill == 'object') ? dataset.highlightFill[index] : dataset.highlightFill : (typeof dataset.fillColor == 'object') ? dataset.fillColor[index] : dataset.fillColor,
                                                highlightStroke : (dataset.highlightStroke) ? (typeof dataset.highlightStroke == 'object') ? dataset.highlightStroke[index] : dataset.highlightStroke : (typeof dataset.strokeColor == 'object') ? dataset.strokeColor[index] : 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 class=\"<%=name.toLowerCase()%>-legend-icon\" style=\"background-color:<%=segments[i].fillColor%>\"></span><span class=\"<%=name.toLowerCase()%>-legend-text\"><%if(segments[i].label){%><%=segments[i].label%><%}%></span></li><%}%></ul>"

        };

        Chart.Type.extend({
                //Passing in a name registers this chart in the Chart namespace
                name: "Doughnut",
                //Providing a defaults will also register the defaults 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 class=\"<%=name.toLowerCase()%>-legend-icon\" style=\"background-color:<%=datasets[i].strokeColor%>\"></span><span class=\"<%=name.toLowerCase()%>-legend-text\"><%if(datasets[i].label){%><%=datasets[i].label%><%}%></span></li><%}%></ul>",

                //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 class=\"<%=name.toLowerCase()%>-legend-icon\" style=\"background-color:<%=segments[i].fillColor%>\"></span><span class=\"<%=name.toLowerCase()%>-legend-text\"><%if(segments[i].label){%><%=segments[i].label%><%}%></span></li><%}%></ul>"
        };


        Chart.Type.extend({
                //Passing in a name registers this chart in the Chart namespace
                name: "PolarArea",
                //Providing a defaults will also register the defaults 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,

                        //Number - Interval at which to draw angle lines ("every Nth point")
                        angleLineInterval: 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 class=\"<%=name.toLowerCase()%>-legend-icon\" style=\"background-color:<%=datasets[i].strokeColor%>\"></span><span class=\"<%=name.toLowerCase()%>-legend-text\"><%if(datasets[i].label){%><%=datasets[i].label%><%}%></span></li><%}%></ul>"

                },

                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,
        angleLineInterval: (this.options.angleLineInterval) ? this.options.angleLineInterval : 1,
                                // 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);