rosa-build/app/assets/javascripts/lib/Chart.js

/*!
 * Chart.js
 * http://chartjs.org/
 * Version: 1.0.1-beta.4
 *
 * Copyright 2014 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,

      // 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 root.define == 'function' && root.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);
      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 (ChartElements.length > 0){
        // If we have multiple datasets, show a MultiTooltip for all of the data points at that index
        // Added by avokhmin: Uses MultiTooltip for all charts
        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,
            // Added by avokhmin
            title: ChartElements[0].tooltipTitle || ChartElements[0].label,
            chart: this.chart,
            ctx: this.chart.ctx
          }).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
            }).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 = 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;

      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(){
      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);

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

          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);

          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;
          }
          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 - 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,
        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 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],
            // Added by avokhmin
            tooltipTitle : data.tooltipTitles[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,
        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);