/*!

* Chart.js
* http://chartjs.org/
* Version: 1.0.1
*
* 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 width = this.width = context.canvas.width;
        var height = this.height = context.canvas.height;
        this.aspectRatio = this.width / this.height;
        //High pixel density displays - multiply the size of the canvas height/width by the device pixel ratio, then scale.
        helpers.retinaScale(this);

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        }
};

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

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

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

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

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

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

                ChartElement.extend = inherits;

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

                ChartElement.__super__ = parent.prototype;

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

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

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

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

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

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

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

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

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

                        }
                }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

                return {
                        x : mouseX,
                        y : mouseY
                };

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

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

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

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

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

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

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

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

                retinaScale(this.chart);

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

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

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

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

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

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

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

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

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

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

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

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

                                                }, this);

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

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

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

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

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

Chart.Type.extend = function(extensions){

        var parent = this;

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

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

        ChartType.extend = Chart.Type.extend;

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

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

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

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

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

                Chart.types[chartName] = ChartType;

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

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

Chart.Element.extend = inherits;

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

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

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

                        ctx.fillStyle = this.fillColor;

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

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

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

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

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

                // ctx.restore();

        }
});

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

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

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

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

                var easingDecimal = animationPercent || 1;

                var ctx = this.ctx;

                ctx.beginPath();

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

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

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

                ctx.fillStyle = this.fillColor;

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

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

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

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

                ctx.beginPath();

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

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

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

                var ctx = this.chart.ctx;

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

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

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

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

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

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

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

                ctx.fillStyle = this.fillColor;

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

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

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

                        ctx.fill();

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

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

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

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

                this.ctx.font = this.titleFont;

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

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

                var halfHeight = this.height/2;

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

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

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

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

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

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

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

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

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

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

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

                        },this);
                }
        }
});

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

                var stepDecimalPlaces = getDecimalPlaces(this.stepValue);

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

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

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

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

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

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

                this.calculateXLabelRotation();

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

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

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

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

                this.ctx.font = this.font;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

                        },this);

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

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

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

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

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

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

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

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

                }
        }

});

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

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

                var stepDecimalPlaces = getDecimalPlaces(this.stepValue);

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

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

                xProtrusionLeft = furthestLeft;

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

                furthestRightAngle = this.getIndexAngle(furthestRightIndex);

                furthestLeftAngle = this.getIndexAngle(furthestLeftIndex);

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

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

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

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

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

        },
        setCenterPoint: function(leftMovement, rightMovement){

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

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

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

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

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

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

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

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

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

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

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

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

root.Chart = Chart;

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

}).call(this);

(function(){

"use strict";

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

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

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

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

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

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

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

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

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

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

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

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

};

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

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

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

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

                                return (baseWidth / datasetCount);
                        }
                });

                this.datasets = [];

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

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

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

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

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

                        this.datasets.push(datasetObject);

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

                },this);

                this.buildScale(data.labels);

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

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

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

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

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

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

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

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

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

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

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

                var ctx = this.chart.ctx;

                this.scale.draw(easingDecimal);

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

                },this);
        }
});

}).call(this);

(function(){

"use strict";

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

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

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

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

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

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

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

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

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

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

};

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

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

                this.SegmentArc = Chart.Arc.extend({
                        ctx : this.chart.ctx,
                        x : this.chart.width/2,
                        y : this.chart.height/2
                });

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

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

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

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

                var location = helpers.getRelativePosition(e);

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

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

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

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

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

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

                        segment.draw();
                        if (index === 0){
                                segment.startAngle = Math.PI * 1.5;
                        }
                        //Check to see if it's the last segment, if not get the next and update the start angle
                        if (index < this.segments.length-1){
                                this.segments[index+1].startAngle = segment.endAngle;
                        }
                },this);

        }
});

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

}).call(this); (function(){

"use strict";

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

var defaultConfig = {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

};

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

                this.datasets = [];

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

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

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

                        this.datasets.push(datasetObject);

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

                        this.buildScale(data.labels);

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

                },this);

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

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

                        return values;
                };

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

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

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

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

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

                var ctx = this.chart.ctx;

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

                this.scale.draw(easingDecimal);

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

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

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

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

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

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

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

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

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

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

                        ctx.stroke();

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

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

}).call(this);

(function(){

"use strict";

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

                this.updateScaleRange(data);

                this.scale.update();

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

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

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

                var location = helpers.getRelativePosition(e);

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

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

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

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

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

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

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

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

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

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

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

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

}).call(this); (function(){

"use strict";

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        },

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

                this.datasets = [];

                this.buildScale(data);

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

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

                                this.showTooltip(activePointsCollection);
                        });
                }

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

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

                        this.datasets.push(datasetObject);

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

                },this);

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

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

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

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

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

                return activePointsCollection;
        },

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

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

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

                helpers.extend(
                        this.scale,
                        scaleSizes
                );

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

                this.scale.labels.push(label);

                this.reflow();

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

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

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

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

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

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

                },this);

        }

});

}).call(this);