/*!
 * chart.js
 * http://chartjs.org/
 * version: 1.0.2
 *
 * copyright 2015 nick downie
 * released under the mit license
 * https://github.com/nnnick/chart.js/blob/master/license.md
 */


(function(){

	"use strict";

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

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

		this.ctx = context;

		//variables global to the chart
		var computedimension = function(element,dimension)
		{
			if (element['offset'+dimension])
			{
				return element['offset'+dimension];
			}
			else
			{
				return document.defaultview.getcomputedstyle(element).getpropertyvalue(dimension);
			}
		};

		var width = this.width = computedimension(context.canvas,'width') || context.canvas.width;
		var height = this.height = computedimension(context.canvas,'height') || context.canvas.height;

		width = this.width = context.canvas.width;
		height = this.height = context.canvas.height;
		this.aspectratio = this.width / this.height;
		//high pixel density displays - multiply the size of the canvas height/width by the device pixel ratio, then scale.
		helpers.retinascale(this);

		return this;
	};
	//globally expose the defaults to allow for user updating/changing
	chart.defaults = {
		global: {
			// boolean - whether to animate the chart
			animation: true,

			// number - number of animation steps
			animationsteps: 60,

			// string - animation easing effect
			animationeasing: "easeoutquart",

			// boolean - if we should show the scale at all
			showscale: true,

			// boolean - if we want to override with a hard coded scale
			scaleoverride: false,

			// ** required if scaleoverride is true **
			// number - the number of steps in a hard coded scale
			scalesteps: null,
			// number - the value jump in the hard coded scale
			scalestepwidth: null,
			// number - the scale starting value
			scalestartvalue: null,

			// string - colour of the scale line
			scalelinecolor: "rgba(0,0,0,.1)",

			// number - pixel width of the scale line
			scalelinewidth: 1,

			// boolean - whether to show labels on the scale
			scaleshowlabels: true,

			// interpolated js string - can access value
			scalelabel: "<%=value%>",

			// boolean - whether the scale should stick to integers, and not show any floats even if drawing space is there
			scaleintegersonly: true,

			// boolean - whether the scale should start at zero, or an order of magnitude down from the lowest value
			scalebeginatzero: false,

			// string - scale label font declaration for the scale label
			scalefontfamily: "'helvetica neue', 'helvetica', 'arial', sans-serif",

			// number - scale label font size in pixels
			scalefontsize: 12,

			// string - scale label font weight style
			scalefontstyle: "normal",

			// string - scale label font colour
			scalefontcolor: "#666",

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

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

			// boolean - determines whether to draw tooltips on the canvas or not - attaches events to touchmove & mousemove
			showtooltips: true,

			// boolean - determines whether to draw built-in tooltip or call custom tooltip function
			customtooltips: false,

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

			// string - tooltip background colour
			tooltipfillcolor: "rgba(0,0,0,0.8)",

			// string - tooltip label font declaration for the scale label
			tooltipfontfamily: "'helvetica neue', 'helvetica', 'arial', sans-serif",

			// number - tooltip label font size in pixels
			tooltipfontsize: 14,

			// string - tooltip font weight style
			tooltipfontstyle: "normal",

			// string - tooltip label font colour
			tooltipfontcolor: "#fff",

			// string - tooltip title font declaration for the scale label
			tooltiptitlefontfamily: "'helvetica neue', 'helvetica', 'arial', sans-serif",

			// number - tooltip title font size in pixels
			tooltiptitlefontsize: 14,

			// string - tooltip title font weight style
			tooltiptitlefontstyle: "bold",

			// string - tooltip title font colour
			tooltiptitlefontcolor: "#fff",

			// string - tooltip title template
			tooltiptitletemplate: "<%= label%>",

			// number - pixel width of padding around tooltip text
			tooltipypadding: 6,

			// number - pixel width of padding around tooltip text
			tooltipxpadding: 6,

			// number - size of the caret on the tooltip
			tooltipcaretsize: 8,

			// number - pixel radius of the tooltip border
			tooltipcornerradius: 6,

			// number - pixel offset from point x to tooltip edge
			tooltipxoffset: 10,

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

			// string - template string for single tooltips
			multitooltiptemplate: "<%= datasetlabel %>: <%= value %>",

			// string - colour behind the legend colour block
			multitooltipkeybackground: '#fff',

			// array - a list of colors to use as the defaults
			segmentcolordefault: ["#a6cee3", "#1f78b4", "#b2df8a", "#33a02c", "#fb9a99", "#e31a1c", "#fdbf6f", "#ff7f00", "#cab2d6", "#6a3d9a", "#b4b482", "#b15928" ],

			// array - a list of highlight colors to use as the defaults
			segmenthighlightcolordefaults: [ "#cef6ff", "#47a0dc", "#daffb2", "#5bc854", "#ffc2c1", "#ff4244", "#ffe797", "#ffa728", "#f2dafe", "#9265c2", "#dcdcaa", "#d98150" ],

			// function - will fire on animation progression.
			onanimationprogress: function(){},

			// function - will fire on animation completion.
			onanimationcomplete: function(){}

		}
	};

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

	//global chart helpers object for utility methods and classes
	var helpers = chart.helpers = {};

		//-- basic js utility methods
	var each = helpers.each = function(loopable,callback,self){
			var additionalargs = array.prototype.slice.call(arguments, 3);
			// check to see if null or undefined firstly.
			if (loopable){
				if (loopable.length === +loopable.length){
					var i;
					for (i=0; i<loopable.length; i++){
						callback.apply(self,[loopable[i], i].concat(additionalargs));
					}
				}
				else{
					for (var item in loopable){
						callback.apply(self,[loopable[item],item].concat(additionalargs));
					}
				}
			}
		},
		clone = helpers.clone = function(obj){
			var objclone = {};
			each(obj,function(value,key){
				if (obj.hasownproperty(key)){
					objclone[key] = value;
				}
			});
			return objclone;
		},
		extend = helpers.extend = function(base){
			each(array.prototype.slice.call(arguments,1), function(extensionobject) {
				each(extensionobject,function(value,key){
					if (extensionobject.hasownproperty(key)){
						base[key] = value;
					}
				});
			});
			return base;
		},
		merge = helpers.merge = function(base,master){
			//merge properties in left object over to a shallow clone of object right.
			var args = array.prototype.slice.call(arguments,0);
			args.unshift({});
			return extend.apply(null, args);
		},
		indexof = helpers.indexof = function(arraytosearch, item){
			if (array.prototype.indexof) {
				return arraytosearch.indexof(item);
			}
			else{
				for (var i = 0; i < arraytosearch.length; i++) {
					if (arraytosearch[i] === item) return i;
				}
				return -1;
			}
		},
		where = helpers.where = function(collection, filtercallback){
			var filtered = [];

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

			return filtered;
		},
		findnextwhere = helpers.findnextwhere = function(arraytosearch, filtercallback, startindex){
			// default to start of the array
			if (!startindex){
				startindex = -1;
			}
			for (var i = startindex + 1; i < arraytosearch.length; i++) {
				var currentitem = arraytosearch[i];
				if (filtercallback(currentitem)){
					return currentitem;
				}
			}
		},
		findpreviouswhere = helpers.findpreviouswhere = function(arraytosearch, filtercallback, startindex){
			// default to end of the array
			if (!startindex){
				startindex = arraytosearch.length;
			}
			for (var i = startindex - 1; i >= 0; i--) {
				var currentitem = arraytosearch[i];
				if (filtercallback(currentitem)){
					return currentitem;
				}
			}
		},
		inherits = helpers.inherits = function(extensions){
			//basic javascript inheritance based on the model created in backbone.js
			var parent = this;
			var chartelement = (extensions && extensions.hasownproperty("constructor")) ? extensions.constructor : function(){ return parent.apply(this, arguments); };

			var surrogate = function(){ this.constructor = chartelement;};
			surrogate.prototype = parent.prototype;
			chartelement.prototype = new surrogate();

			chartelement.extend = inherits;

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

			chartelement.__super__ = parent.prototype;

			return chartelement;
		},
		noop = helpers.noop = function(){},
		uid = helpers.uid = (function(){
			var id=0;
			return function(){
				return "chart-" + id++;
			};
		})(),
		warn = helpers.warn = function(str){
			//method for warning of errors
			if (window.console && typeof window.console.warn === "function") console.warn(str);
		},
		amd = helpers.amd = (typeof define === 'function' && define.amd),
		//-- math methods
		isnumber = helpers.isnumber = function(n){
			return !isnan(parsefloat(n)) && isfinite(n);
		},
		max = helpers.max = function(array){
			return math.max.apply( math, array );
		},
		min = helpers.min = function(array){
			return math.min.apply( math, array );
		},
		cap = helpers.cap = function(valuetocap,maxvalue,minvalue){
			if(isnumber(maxvalue)) {
				if( valuetocap > maxvalue ) {
					return maxvalue;
				}
			}
			else if(isnumber(minvalue)){
				if ( valuetocap < minvalue ){
					return minvalue;
				}
			}
			return valuetocap;
		},
		getdecimalplaces = helpers.getdecimalplaces = function(num){
			if (num%1!==0 && isnumber(num)){
				var s = num.tostring();
				if(s.indexof("e-") < 0){
					// no exponent, e.g. 0.01
					return s.split(".")[1].length;
				}
				else if(s.indexof(".") < 0) {
					// no decimal point, e.g. 1e-9
					return parseint(s.split("e-")[1]);
				}
				else {
					// exponent and decimal point, e.g. 1.23e-9
					var parts = s.split(".")[1].split("e-");
					return parts[0].length + parseint(parts[1]);
				}
			}
			else {
				return 0;
			}
		},
		toradians = helpers.radians = function(degrees){
			return degrees * (math.pi/180);
		},
		// gets the angle from vertical upright to the point about a centre.
		getanglefrompoint = helpers.getanglefrompoint = function(centrepoint, anglepoint){
			var distancefromxcenter = anglepoint.x - centrepoint.x,
				distancefromycenter = anglepoint.y - centrepoint.y,
				radialdistancefromcenter = math.sqrt( distancefromxcenter * distancefromxcenter + distancefromycenter * distancefromycenter);


			var angle = math.pi * 2 + math.atan2(distancefromycenter, distancefromxcenter);

			//if the segment is in the top left quadrant, we need to add another rotation to the angle
			if (distancefromxcenter < 0 && distancefromycenter < 0){
				angle += math.pi*2;
			}

			return {
				angle: angle,
				distance: radialdistancefromcenter
			};
		},
		aliaspixel = helpers.aliaspixel = function(pixelwidth){
			return (pixelwidth % 2 === 0) ? 0 : 0.5;
		},
		splinecurve = helpers.splinecurve = function(firstpoint,middlepoint,afterpoint,t){
			//props to rob spencer at scaled innovation for his post on splining between points
			//http://scaledinnovation.com/analytics/splines/aboutsplines.html
			var d01=math.sqrt(math.pow(middlepoint.x-firstpoint.x,2)+math.pow(middlepoint.y-firstpoint.y,2)),
				d12=math.sqrt(math.pow(afterpoint.x-middlepoint.x,2)+math.pow(afterpoint.y-middlepoint.y,2)),
				fa=t*d01/(d01+d12),// scaling factor for triangle ta
				fb=t*d12/(d01+d12);
			return {
				inner : {
					x : middlepoint.x-fa*(afterpoint.x-firstpoint.x),
					y : middlepoint.y-fa*(afterpoint.y-firstpoint.y)
				},
				outer : {
					x: middlepoint.x+fb*(afterpoint.x-firstpoint.x),
					y : middlepoint.y+fb*(afterpoint.y-firstpoint.y)
				}
			};
		},
		calculateorderofmagnitude = helpers.calculateorderofmagnitude = function(val){
			return math.floor(math.log(val) / math.ln10);
		},
		calculatescalerange = helpers.calculatescalerange = function(valuesarray, drawingsize, textsize, startfromzero, integersonly){

			//set a minimum step of two - a point at the top of the graph, and a point at the base
			var minsteps = 2,
				maxsteps = math.floor(drawingsize/(textsize * 1.5)),
				skipfitting = (minsteps >= maxsteps);

			// filter out null values since these would min() to zero
			var values = [];
			each(valuesarray, function( v ){
				v == null || values.push( v );
			});
			var minvalue = min(values),
			    maxvalue = max(values);

			// we need some degree of separation here to calculate the scales if all the values are the same
			// adding/minusing 0.5 will give us a range of 1.
			if (maxvalue === minvalue){
				maxvalue += 0.5;
				// so we don't end up with a graph with a negative start value if we've said always start from zero
				if (minvalue >= 0.5 && !startfromzero){
					minvalue -= 0.5;
				}
				else{
					// make up a whole number above the values
					maxvalue += 0.5;
				}
			}

			var	valuerange = math.abs(maxvalue - minvalue),
				rangeorderofmagnitude = calculateorderofmagnitude(valuerange),
				graphmax = math.ceil(maxvalue / (1 * math.pow(10, rangeorderofmagnitude))) * math.pow(10, rangeorderofmagnitude),
				graphmin = (startfromzero) ? 0 : math.floor(minvalue / (1 * math.pow(10, rangeorderofmagnitude))) * math.pow(10, rangeorderofmagnitude),
				graphrange = graphmax - graphmin,
				stepvalue = math.pow(10, rangeorderofmagnitude),
				numberofsteps = math.round(graphrange / stepvalue);

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

				}
			}

			if (skipfitting){
				numberofsteps = minsteps;
				stepvalue = graphrange / numberofsteps;
			}

			return {
				steps : numberofsteps,
				stepvalue : stepvalue,
				min : graphmin,
				max	: graphmin + (numberofsteps * stepvalue)
			};

		},
		/* jshint ignore:start */
		// blows up jshint errors based on the new function constructor
		//templating methods
		//javascript micro templating by john resig - source at http://ejohn.org/blog/javascript-micro-templating/
		template = helpers.template = function(templatestring, valuesobject){

			// if templatestring is function rather than string-template - call the function for valuesobject

			if(templatestring instanceof function){
			 	return templatestring(valuesobject);
		 	}

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

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

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

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

				// provide some basic currying to the user
				return data ? fn( data ) : fn;
			}
			return tmpl(templatestring,valuesobject);
		},
		/* jshint ignore:end */
		generatelabels = helpers.generatelabels = function(templatestring,numberofsteps,graphmin,stepvalue){
			var labelsarray = new array(numberofsteps);
			if (templatestring){
				each(labelsarray,function(val,index){
					labelsarray[index] = template(templatestring,{value: (graphmin + (stepvalue*(index+1)))});
				});
			}
			return labelsarray;
		},
		//--animation methods
		//easing functions adapted from robert penner's easing equations
		//http://www.robertpenner.com/easing/
		easingeffects = helpers.easingeffects = {
			linear: function (t) {
				return t;
			},
			easeinquad: function (t) {
				return t * t;
			},
			easeoutquad: function (t) {
				return -1 * t * (t - 2);
			},
			easeinoutquad: function (t) {
				if ((t /= 1 / 2) < 1){
					return 1 / 2 * t * t;
				}
				return -1 / 2 * ((--t) * (t - 2) - 1);
			},
			easeincubic: function (t) {
				return t * t * t;
			},
			easeoutcubic: function (t) {
				return 1 * ((t = t / 1 - 1) * t * t + 1);
			},
			easeinoutcubic: function (t) {
				if ((t /= 1 / 2) < 1){
					return 1 / 2 * t * t * t;
				}
				return 1 / 2 * ((t -= 2) * t * t + 2);
			},
			easeinquart: function (t) {
				return t * t * t * t;
			},
			easeoutquart: function (t) {
				return -1 * ((t = t / 1 - 1) * t * t * t - 1);
			},
			easeinoutquart: function (t) {
				if ((t /= 1 / 2) < 1){
					return 1 / 2 * t * t * t * t;
				}
				return -1 / 2 * ((t -= 2) * t * t * t - 2);
			},
			easeinquint: function (t) {
				return 1 * (t /= 1) * t * t * t * t;
			},
			easeoutquint: function (t) {
				return 1 * ((t = t / 1 - 1) * t * t * t * t + 1);
			},
			easeinoutquint: function (t) {
				if ((t /= 1 / 2) < 1){
					return 1 / 2 * t * t * t * t * t;
				}
				return 1 / 2 * ((t -= 2) * t * t * t * t + 2);
			},
			easeinsine: function (t) {
				return -1 * math.cos(t / 1 * (math.pi / 2)) + 1;
			},
			easeoutsine: function (t) {
				return 1 * math.sin(t / 1 * (math.pi / 2));
			},
			easeinoutsine: function (t) {
				return -1 / 2 * (math.cos(math.pi * t / 1) - 1);
			},
			easeinexpo: function (t) {
				return (t === 0) ? 1 : 1 * math.pow(2, 10 * (t / 1 - 1));
			},
			easeoutexpo: function (t) {
				return (t === 1) ? 1 : 1 * (-math.pow(2, -10 * t / 1) + 1);
			},
			easeinoutexpo: function (t) {
				if (t === 0){
					return 0;
				}
				if (t === 1){
					return 1;
				}
				if ((t /= 1 / 2) < 1){
					return 1 / 2 * math.pow(2, 10 * (t - 1));
				}
				return 1 / 2 * (-math.pow(2, -10 * --t) + 2);
			},
			easeincirc: function (t) {
				if (t >= 1){
					return t;
				}
				return -1 * (math.sqrt(1 - (t /= 1) * t) - 1);
			},
			easeoutcirc: function (t) {
				return 1 * math.sqrt(1 - (t = t / 1 - 1) * t);
			},
			easeinoutcirc: function (t) {
				if ((t /= 1 / 2) < 1){
					return -1 / 2 * (math.sqrt(1 - t * t) - 1);
				}
				return 1 / 2 * (math.sqrt(1 - (t -= 2) * t) + 1);
			},
			easeinelastic: function (t) {
				var s = 1.70158;
				var p = 0;
				var a = 1;
				if (t === 0){
					return 0;
				}
				if ((t /= 1) == 1){
					return 1;
				}
				if (!p){
					p = 1 * 0.3;
				}
				if (a < math.abs(1)) {
					a = 1;
					s = p / 4;
				} else{
					s = p / (2 * math.pi) * math.asin(1 / a);
				}
				return -(a * math.pow(2, 10 * (t -= 1)) * math.sin((t * 1 - s) * (2 * math.pi) / p));
			},
			easeoutelastic: function (t) {
				var s = 1.70158;
				var p = 0;
				var a = 1;
				if (t === 0){
					return 0;
				}
				if ((t /= 1) == 1){
					return 1;
				}
				if (!p){
					p = 1 * 0.3;
				}
				if (a < math.abs(1)) {
					a = 1;
					s = p / 4;
				} else{
					s = p / (2 * math.pi) * math.asin(1 / a);
				}
				return a * math.pow(2, -10 * t) * math.sin((t * 1 - s) * (2 * math.pi) / p) + 1;
			},
			easeinoutelastic: function (t) {
				var s = 1.70158;
				var p = 0;
				var a = 1;
				if (t === 0){
					return 0;
				}
				if ((t /= 1 / 2) == 2){
					return 1;
				}
				if (!p){
					p = 1 * (0.3 * 1.5);
				}
				if (a < math.abs(1)) {
					a = 1;
					s = p / 4;
				} else {
					s = p / (2 * math.pi) * math.asin(1 / a);
				}
				if (t < 1){
					return -0.5 * (a * math.pow(2, 10 * (t -= 1)) * math.sin((t * 1 - s) * (2 * math.pi) / p));}
				return a * math.pow(2, -10 * (t -= 1)) * math.sin((t * 1 - s) * (2 * math.pi) / p) * 0.5 + 1;
			},
			easeinback: function (t) {
				var s = 1.70158;
				return 1 * (t /= 1) * t * ((s + 1) * t - s);
			},
			easeoutback: function (t) {
				var s = 1.70158;
				return 1 * ((t = t / 1 - 1) * t * ((s + 1) * t + s) + 1);
			},
			easeinoutback: function (t) {
				var s = 1.70158;
				if ((t /= 1 / 2) < 1){
					return 1 / 2 * (t * t * (((s *= (1.525)) + 1) * t - s));
				}
				return 1 / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2);
			},
			easeinbounce: function (t) {
				return 1 - easingeffects.easeoutbounce(1 - t);
			},
			easeoutbounce: function (t) {
				if ((t /= 1) < (1 / 2.75)) {
					return 1 * (7.5625 * t * t);
				} else if (t < (2 / 2.75)) {
					return 1 * (7.5625 * (t -= (1.5 / 2.75)) * t + 0.75);
				} else if (t < (2.5 / 2.75)) {
					return 1 * (7.5625 * (t -= (2.25 / 2.75)) * t + 0.9375);
				} else {
					return 1 * (7.5625 * (t -= (2.625 / 2.75)) * t + 0.984375);
				}
			},
			easeinoutbounce: function (t) {
				if (t < 1 / 2){
					return easingeffects.easeinbounce(t * 2) * 0.5;
				}
				return easingeffects.easeoutbounce(t * 2 - 1) * 0.5 + 1 * 0.5;
			}
		},
		//request animation polyfill - http://www.paulirish.com/2011/requestanimationframe-for-smart-animating/
		requestanimframe = helpers.requestanimframe = (function(){
			return window.requestanimationframe ||
				window.webkitrequestanimationframe ||
				window.mozrequestanimationframe ||
				window.orequestanimationframe ||
				window.msrequestanimationframe ||
				function(callback) {
					return window.settimeout(callback, 1000 / 60);
				};
		})(),
		cancelanimframe = helpers.cancelanimframe = (function(){
			return window.cancelanimationframe ||
				window.webkitcancelanimationframe ||
				window.mozcancelanimationframe ||
				window.ocancelanimationframe ||
				window.mscancelanimationframe ||
				function(callback) {
					return window.cleartimeout(callback, 1000 / 60);
				};
		})(),
		animationloop = helpers.animationloop = function(callback,totalsteps,easingstring,onprogress,oncomplete,chartinstance){

			var currentstep = 0,
				easingfunction = easingeffects[easingstring] || easingeffects.linear;

			var animationframe = function(){
				currentstep++;
				var stepdecimal = currentstep/totalsteps;
				var easedecimal = easingfunction(stepdecimal);

				callback.call(chartinstance,easedecimal,stepdecimal, currentstep);
				onprogress.call(chartinstance,easedecimal,stepdecimal);
				if (currentstep < totalsteps){
					chartinstance.animationframe = requestanimframe(animationframe);
				} else{
					oncomplete.apply(chartinstance);
				}
			};
			requestanimframe(animationframe);
		},
		//-- dom methods
		getrelativeposition = helpers.getrelativeposition = function(evt){
			var mousex, mousey;
			var e = evt.originalevent || evt,
				canvas = evt.currenttarget || evt.srcelement,
				boundingrect = canvas.getboundingclientrect();

			if (e.touches){
				mousex = e.touches[0].clientx - boundingrect.left;
				mousey = e.touches[0].clienty - boundingrect.top;

			}
			else{
				mousex = e.clientx - boundingrect.left;
				mousey = e.clienty - boundingrect.top;
			}

			return {
				x : mousex,
				y : mousey
			};

		},
		addevent = helpers.addevent = function(node,eventtype,method){
			if (node.addeventlistener){
				node.addeventlistener(eventtype,method);
			} else if (node.attachevent){
				node.attachevent("on"+eventtype, method);
			} else {
				node["on"+eventtype] = method;
			}
		},
		removeevent = helpers.removeevent = function(node, eventtype, handler){
			if (node.removeeventlistener){
				node.removeeventlistener(eventtype, handler, false);
			} else if (node.detachevent){
				node.detachevent("on"+eventtype,handler);
			} else{
				node["on" + eventtype] = noop;
			}
		},
		bindevents = helpers.bindevents = function(chartinstance, arrayofevents, handler){
			// create the events object if it's not already present
			if (!chartinstance.events) chartinstance.events = {};

			each(arrayofevents,function(eventname){
				chartinstance.events[eventname] = function(){
					handler.apply(chartinstance, arguments);
				};
				addevent(chartinstance.chart.canvas,eventname,chartinstance.events[eventname]);
			});
		},
		unbindevents = helpers.unbindevents = function (chartinstance, arrayofevents) {
			each(arrayofevents, function(handler,eventname){
				removeevent(chartinstance.chart.canvas, eventname, handler);
			});
		},
		getmaximumwidth = helpers.getmaximumwidth = function(domnode){
			var container = domnode.parentnode,
			    padding = parseint(getstyle(container, 'padding-left')) + parseint(getstyle(container, 'padding-right'));
			// todo = check cross browser stuff with this.
			return container ? container.clientwidth - padding : 0;
		},
		getmaximumheight = helpers.getmaximumheight = function(domnode){
			var container = domnode.parentnode,
			    padding = parseint(getstyle(container, 'padding-bottom')) + parseint(getstyle(container, 'padding-top'));
			// todo = check cross browser stuff with this.
			return container ? container.clientheight - padding : 0;
		},
		getstyle = helpers.getstyle = function (el, property) {
			return el.currentstyle ?
				el.currentstyle[property] :
				document.defaultview.getcomputedstyle(el, null).getpropertyvalue(property);
		},
		getmaximumsize = helpers.getmaximumsize = helpers.getmaximumwidth, // legacy support
		retinascale = helpers.retinascale = function(chart){
			var ctx = chart.ctx,
				width = chart.canvas.width,
				height = chart.canvas.height;

			if (window.devicepixelratio) {
				ctx.canvas.style.width = width + "px";
				ctx.canvas.style.height = height + "px";
				ctx.canvas.height = height * window.devicepixelratio;
				ctx.canvas.width = width * window.devicepixelratio;
				ctx.scale(window.devicepixelratio, window.devicepixelratio);
			}
		},
		//-- canvas methods
		clear = helpers.clear = function(chart){
			chart.ctx.clearrect(0,0,chart.width,chart.height);
		},
		fontstring = helpers.fontstring = function(pixelsize,fontstyle,fontfamily){
			return fontstyle + " " + pixelsize+"px " + fontfamily;
		},
		longesttext = helpers.longesttext = function(ctx,font,arrayofstrings){
			ctx.font = font;
			var longest = 0;
			each(arrayofstrings,function(string){
				var textwidth = ctx.measuretext(string).width;
				longest = (textwidth > longest) ? textwidth : longest;
			});
			return longest;
		},
		drawroundedrectangle = helpers.drawroundedrectangle = function(ctx,x,y,width,height,radius){
			ctx.beginpath();
			ctx.moveto(x + radius, y);
			ctx.lineto(x + width - radius, y);
			ctx.quadraticcurveto(x + width, y, x + width, y + radius);
			ctx.lineto(x + width, y + height - radius);
			ctx.quadraticcurveto(x + width, y + height, x + width - radius, y + height);
			ctx.lineto(x + radius, y + height);
			ctx.quadraticcurveto(x, y + height, x, y + height - radius);
			ctx.lineto(x, y + radius);
			ctx.quadraticcurveto(x, y, x + radius, y);
			ctx.closepath();
		};


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

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

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

	//core methods that'll be a part of every chart type
	extend(chart.type.prototype,{
		initialize : function(){return this;},
		clear : function(){
			clear(this.chart);
			return this;
		},
		stop : function(){
			// stops any current animation loop occuring
			chart.animationservice.cancelanimation(this);
			return this;
		},
		resize : function(callback){
			this.stop();
			var canvas = this.chart.canvas,
				newwidth = getmaximumwidth(this.chart.canvas),
				newheight = this.options.maintainaspectratio ? newwidth / this.chart.aspectratio : getmaximumheight(this.chart.canvas);

			canvas.width = this.chart.width = newwidth;
			canvas.height = this.chart.height = newheight;

			retinascale(this.chart);

			if (typeof callback === "function"){
				callback.apply(this, array.prototype.slice.call(arguments, 1));
			}
			return this;
		},
		reflow : noop,
		render : function(reflow){
			if (reflow){
				this.reflow();
			}
			
			if (this.options.animation && !reflow){
				var animation = new chart.animation();
				animation.numsteps = this.options.animationsteps;
				animation.easing = this.options.animationeasing;
				
				// render function
				animation.render = function(chartinstance, animationobject) {
					var easingfunction = helpers.easingeffects[animationobject.easing];
					var stepdecimal = animationobject.currentstep / animationobject.numsteps;
					var easedecimal = easingfunction(stepdecimal);
					
					chartinstance.draw(easedecimal, stepdecimal, animationobject.currentstep);
				};
				
				// user events
				animation.onanimationprogress = this.options.onanimationprogress;
				animation.onanimationcomplete = this.options.onanimationcomplete;
				
				chart.animationservice.addanimation(this, animation);
			}
			else{
				this.draw();
				this.options.onanimationcomplete.call(this);
			}
			return this;
		},
		generatelegend : function(){
			return template(this.options.legendtemplate,this);
		},
		destroy : function(){
			this.clear();
			unbindevents(this, this.events);
			var canvas = this.chart.canvas;

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

			// < ie9 doesn't support removeproperty
			if (canvas.style.removeproperty) {
				canvas.style.removeproperty('width');
				canvas.style.removeproperty('height');
			} else {
				canvas.style.removeattribute('width');
				canvas.style.removeattribute('height');
			}

			delete chart.instances[this.id];
		},
		showtooltip : function(chartelements, forceredraw){
			// only redraw the chart if we've actually changed what we're hovering on.
			if (typeof this.activeelements === 'undefined') this.activeelements = [];

			var ischanged = (function(elements){
				var changed = false;

				if (elements.length !== this.activeelements.length){
					changed = true;
					return changed;
				}

				each(elements, function(element, index){
					if (element !== this.activeelements[index]){
						changed = true;
					}
				}, this);
				return changed;
			}).call(this, chartelements);

			if (!ischanged && !forceredraw){
				return;
			}
			else{
				this.activeelements = chartelements;
			}
			this.draw();
			if(this.options.customtooltips){
				this.options.customtooltips(false);
			}
			if (chartelements.length > 0){
				// if we have multiple datasets, show a multitooltip for all of the data points at that index
				if (this.datasets && this.datasets.length > 1) {
					var dataarray,
						dataindex;

					for (var i = this.datasets.length - 1; i >= 0; i--) {
						dataarray = this.datasets[i].points || this.datasets[i].bars || this.datasets[i].segments;
						dataindex = indexof(dataarray, chartelements[0]);
						if (dataindex !== -1){
							break;
						}
					}
					var tooltiplabels = [],
						tooltipcolors = [],
						medianposition = (function(index) {

							// get all the points at that particular index
							var elements = [],
								datacollection,
								xpositions = [],
								ypositions = [],
								xmax,
								ymax,
								xmin,
								ymin;
							helpers.each(this.datasets, function(dataset){
								datacollection = dataset.points || dataset.bars || dataset.segments;
								if (datacollection[dataindex] && datacollection[dataindex].hasvalue()){
									elements.push(datacollection[dataindex]);
								}
							});

							helpers.each(elements, function(element) {
								xpositions.push(element.x);
								ypositions.push(element.y);


								//include any colour information about the element
								tooltiplabels.push(helpers.template(this.options.multitooltiptemplate, element));
								tooltipcolors.push({
									fill: element._saved.fillcolor || element.fillcolor,
									stroke: element._saved.strokecolor || element.strokecolor
								});

							}, this);

							ymin = min(ypositions);
							ymax = max(ypositions);

							xmin = min(xpositions);
							xmax = max(xpositions);

							return {
								x: (xmin > this.chart.width/2) ? xmin : xmax,
								y: (ymin + ymax)/2
							};
						}).call(this, dataindex);

					new chart.multitooltip({
						x: medianposition.x,
						y: medianposition.y,
						xpadding: this.options.tooltipxpadding,
						ypadding: this.options.tooltipypadding,
						xoffset: this.options.tooltipxoffset,
						fillcolor: this.options.tooltipfillcolor,
						textcolor: this.options.tooltipfontcolor,
						fontfamily: this.options.tooltipfontfamily,
						fontstyle: this.options.tooltipfontstyle,
						fontsize: this.options.tooltipfontsize,
						titletextcolor: this.options.tooltiptitlefontcolor,
						titlefontfamily: this.options.tooltiptitlefontfamily,
						titlefontstyle: this.options.tooltiptitlefontstyle,
						titlefontsize: this.options.tooltiptitlefontsize,
						cornerradius: this.options.tooltipcornerradius,
						labels: tooltiplabels,
						legendcolors: tooltipcolors,
						legendcolorbackground : this.options.multitooltipkeybackground,
						title: template(this.options.tooltiptitletemplate,chartelements[0]),
						chart: this.chart,
						ctx: this.chart.ctx,
						custom: this.options.customtooltips
					}).draw();

				} else {
					each(chartelements, function(element) {
						var tooltipposition = element.tooltipposition();
						new chart.tooltip({
							x: math.round(tooltipposition.x),
							y: math.round(tooltipposition.y),
							xpadding: this.options.tooltipxpadding,
							ypadding: this.options.tooltipypadding,
							fillcolor: this.options.tooltipfillcolor,
							textcolor: this.options.tooltipfontcolor,
							fontfamily: this.options.tooltipfontfamily,
							fontstyle: this.options.tooltipfontstyle,
							fontsize: this.options.tooltipfontsize,
							caretheight: this.options.tooltipcaretsize,
							cornerradius: this.options.tooltipcornerradius,
							text: template(this.options.tooltiptemplate, element),
							chart: this.chart,
							custom: this.options.customtooltips
						}).draw();
					}, this);
				}
			}
			return this;
		},
		tobase64image : function(){
			return this.chart.canvas.todataurl.apply(this.chart.canvas, arguments);
		}
	});

	chart.type.extend = function(extensions){

		var parent = this;

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

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

		charttype.extend = chart.type.extend;

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

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

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

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

			chart.defaults[chartname] = extend(basedefaults,extensions.defaults);

			chart.types[chartname] = charttype;

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

	chart.element = function(configuration){
		extend(this,configuration);
		this.initialize.apply(this,arguments);
		this.save();
	};
	extend(chart.element.prototype,{
		initialize : function(){},
		restore : function(props){
			if (!props){
				extend(this,this._saved);
			} else {
				each(props,function(key){
					this[key] = this._saved[key];
				},this);
			}
			return this;
		},
		save : function(){
			this._saved = clone(this);
			delete this._saved._saved;
			return this;
		},
		update : function(newprops){
			each(newprops,function(value,key){
				this._saved[key] = this[key];
				this[key] = value;
			},this);
			return this;
		},
		transition : function(props,ease){
			each(props,function(value,key){
				this[key] = ((value - this._saved[key]) * ease) + this._saved[key];
			},this);
			return this;
		},
		tooltipposition : function(){
			return {
				x : this.x,
				y : this.y
			};
		},
		hasvalue: function(){
			return isnumber(this.value);
		}
	});

	chart.element.extend = inherits;


	chart.point = chart.element.extend({
		display: true,
		inrange: function(chartx,charty){
			var hitdetectionrange = this.hitdetectionradius + this.radius;
			return ((math.pow(chartx-this.x, 2)+math.pow(charty-this.y, 2)) < math.pow(hitdetectionrange,2));
		},
		draw : function(){
			if (this.display){
				var ctx = this.ctx;
				ctx.beginpath();

				ctx.arc(this.x, this.y, this.radius, 0, math.pi*2);
				ctx.closepath();

				ctx.strokestyle = this.strokecolor;
				ctx.linewidth = this.strokewidth;

				ctx.fillstyle = this.fillcolor;

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


			//quick debug for bezier curve splining
			//highlights control points and the line between them.
			//handy for dev - stripped in the min version.

			// ctx.save();
			// ctx.fillstyle = "black";
			// ctx.strokestyle = "black"
			// ctx.beginpath();
			// ctx.arc(this.controlpoints.inner.x,this.controlpoints.inner.y, 2, 0, math.pi*2);
			// ctx.fill();

			// ctx.beginpath();
			// ctx.arc(this.controlpoints.outer.x,this.controlpoints.outer.y, 2, 0, math.pi*2);
			// ctx.fill();

			// ctx.moveto(this.controlpoints.inner.x,this.controlpoints.inner.y);
			// ctx.lineto(this.x, this.y);
			// ctx.lineto(this.controlpoints.outer.x,this.controlpoints.outer.y);
			// ctx.stroke();

			// ctx.restore();



		}
	});

	chart.arc = chart.element.extend({
		inrange : function(chartx,charty){

			var pointrelativeposition = helpers.getanglefrompoint(this, {
				x: chartx,
				y: charty
			});

			// normalize all angles to 0 - 2*pi (0 - 360°)
			var pointrelativeangle = pointrelativeposition.angle % (math.pi * 2),
			    startangle = (math.pi * 2 + this.startangle) % (math.pi * 2),
			    endangle = (math.pi * 2 + this.endangle) % (math.pi * 2) || 360;

			// calculate wether the pointrelativeangle is between the start and the end angle
			var betweenangles = (endangle < startangle) ?
				pointrelativeangle <= endangle || pointrelativeangle >= startangle:
				pointrelativeangle >= startangle && pointrelativeangle <= endangle;

			//check if within the range of the open/close angle
			var withinradius = (pointrelativeposition.distance >= this.innerradius && pointrelativeposition.distance <= this.outerradius);

			return (betweenangles && withinradius);
			//ensure within the outside of the arc centre, but inside arc outer
		},
		tooltipposition : function(){
			var centreangle = this.startangle + ((this.endangle - this.startangle) / 2),
				rangefromcentre = (this.outerradius - this.innerradius) / 2 + this.innerradius;
			return {
				x : this.x + (math.cos(centreangle) * rangefromcentre),
				y : this.y + (math.sin(centreangle) * rangefromcentre)
			};
		},
		draw : function(animationpercent){

			var easingdecimal = animationpercent || 1;

			var ctx = this.ctx;

			ctx.beginpath();

			ctx.arc(this.x, this.y, this.outerradius < 0 ? 0 : this.outerradius, this.startangle, this.endangle);

            ctx.arc(this.x, this.y, this.innerradius < 0 ? 0 : this.innerradius, this.endangle, this.startangle, true);

			ctx.closepath();
			ctx.strokestyle = this.strokecolor;
			ctx.linewidth = this.strokewidth;

			ctx.fillstyle = this.fillcolor;

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

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

	chart.rectangle = chart.element.extend({
		draw : function(){
			var ctx = this.ctx,
				halfwidth = this.width/2,
				leftx = this.x - halfwidth,
				rightx = this.x + halfwidth,
				top = this.base - (this.base - this.y),
				halfstroke = this.strokewidth / 2;

			// canvas doesn't allow us to stroke inside the width so we can
			// adjust the sizes to fit if we're setting a stroke on the line
			if (this.showstroke){
				leftx += halfstroke;
				rightx -= halfstroke;
				top += halfstroke;
			}

			ctx.beginpath();

			ctx.fillstyle = this.fillcolor;
			ctx.strokestyle = this.strokecolor;
			ctx.linewidth = this.strokewidth;

			// it'd be nice to keep this class totally generic to any rectangle
			// and simply specify which border to miss out.
			ctx.moveto(leftx, this.base);
			ctx.lineto(leftx, top);
			ctx.lineto(rightx, top);
			ctx.lineto(rightx, this.base);
			ctx.fill();
			if (this.showstroke){
				ctx.stroke();
			}
		},
		height : function(){
			return this.base - this.y;
		},
		inrange : function(chartx,charty){
			return (chartx >= this.x - this.width/2 && chartx <= this.x + this.width/2) && (charty >= this.y && charty <= this.base);
		}
	});

	chart.animation = chart.element.extend({
		currentstep: null, // the current animation step
		numsteps: 60, // default number of steps
		easing: "", // the easing to use for this animation
		render: null, // render function used by the animation service
		
		onanimationprogress: null, // user specified callback to fire on each step of the animation 
		onanimationcomplete: null, // user specified callback to fire when the animation finishes
	});
	
	chart.tooltip = chart.element.extend({
		draw : function(){

			var ctx = this.chart.ctx;

			ctx.font = fontstring(this.fontsize,this.fontstyle,this.fontfamily);

			this.xalign = "center";
			this.yalign = "above";

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

			var tooltipwidth = ctx.measuretext(this.text).width + 2*this.xpadding,
				tooltiprectheight = this.fontsize + 2*this.ypadding,
				tooltipheight = tooltiprectheight + this.caretheight + caretpadding;

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

			if (this.y - tooltipheight < 0){
				this.yalign = "below";
			}


			var tooltipx = this.x - tooltipwidth/2,
				tooltipy = this.y - tooltipheight;

			ctx.fillstyle = this.fillcolor;

			// custom tooltips
			if(this.custom){
				this.custom(this);
			}
			else{
				switch(this.yalign)
				{
				case "above":
					//draw a caret above the x/y
					ctx.beginpath();
					ctx.moveto(this.x,this.y - caretpadding);
					ctx.lineto(this.x + this.caretheight, this.y - (caretpadding + this.caretheight));
					ctx.lineto(this.x - this.caretheight, this.y - (caretpadding + this.caretheight));
					ctx.closepath();
					ctx.fill();
					break;
				case "below":
					tooltipy = this.y + caretpadding + this.caretheight;
					//draw a caret below the x/y
					ctx.beginpath();
					ctx.moveto(this.x, this.y + caretpadding);
					ctx.lineto(this.x + this.caretheight, this.y + caretpadding + this.caretheight);
					ctx.lineto(this.x - this.caretheight, this.y + caretpadding + this.caretheight);
					ctx.closepath();
					ctx.fill();
					break;
				}

				switch(this.xalign)
				{
				case "left":
					tooltipx = this.x - tooltipwidth + (this.cornerradius + this.caretheight);
					break;
				case "right":
					tooltipx = this.x - (this.cornerradius + this.caretheight);
					break;
				}

				drawroundedrectangle(ctx,tooltipx,tooltipy,tooltipwidth,tooltiprectheight,this.cornerradius);

				ctx.fill();

				ctx.fillstyle = this.textcolor;
				ctx.textalign = "center";
				ctx.textbaseline = "middle";
				ctx.filltext(this.text, tooltipx + tooltipwidth/2, tooltipy + tooltiprectheight/2);
			}
		}
	});

	chart.multitooltip = chart.element.extend({
		initialize : function(){
			this.font = fontstring(this.fontsize,this.fontstyle,this.fontfamily);

			this.titlefont = fontstring(this.titlefontsize,this.titlefontstyle,this.titlefontfamily);

			this.titleheight = this.title ? this.titlefontsize * 1.5 : 0;
			this.height = (this.labels.length * this.fontsize) + ((this.labels.length-1) * (this.fontsize/2)) + (this.ypadding*2) + this.titleheight;

			this.ctx.font = this.titlefont;

			var titlewidth = this.ctx.measuretext(this.title).width,
				//label has a legend square as well so account for this.
				labelwidth = longesttext(this.ctx,this.font,this.labels) + this.fontsize + 3,
				longesttextwidth = max([labelwidth,titlewidth]);

			this.width = longesttextwidth + (this.xpadding*2);


			var halfheight = this.height/2;

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

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


		},
		getlineheight : function(index){
			var baselineheight = this.y - (this.height/2) + this.ypadding,
				aftertitleindex = index-1;

			//if the index is zero, we're getting the title
			if (index === 0){
				return baselineheight + this.titleheight / 3;
			} else{
				return baselineheight + ((this.fontsize * 1.5 * aftertitleindex) + this.fontsize / 2) + this.titleheight;
			}

		},
		draw : function(){
			// custom tooltips
			if(this.custom){
				this.custom(this);
			}
			else{
				drawroundedrectangle(this.ctx,this.x,this.y - this.height/2,this.width,this.height,this.cornerradius);
				var ctx = this.ctx;
				ctx.fillstyle = this.fillcolor;
				ctx.fill();
				ctx.closepath();

				ctx.textalign = "left";
				ctx.textbaseline = "middle";
				ctx.fillstyle = this.titletextcolor;
				ctx.font = this.titlefont;

				ctx.filltext(this.title,this.x + this.xpadding, this.getlineheight(0));

				ctx.font = this.font;
				helpers.each(this.labels,function(label,index){
					ctx.fillstyle = this.textcolor;
					ctx.filltext(label,this.x + this.xpadding + this.fontsize + 3, this.getlineheight(index + 1));

					//a bit gnarly, but clearing this rectangle breaks when using explorercanvas (clears whole canvas)
					//ctx.clearrect(this.x + this.xpadding, this.getlineheight(index + 1) - this.fontsize/2, this.fontsize, this.fontsize);
					//instead we'll make a white filled block to put the legendcolour palette over.

					ctx.fillstyle = this.legendcolorbackground;
					ctx.fillrect(this.x + this.xpadding, this.getlineheight(index + 1) - this.fontsize/2, this.fontsize, this.fontsize);

					ctx.fillstyle = this.legendcolors[index].fill;
					ctx.fillrect(this.x + this.xpadding, this.getlineheight(index + 1) - this.fontsize/2, this.fontsize, this.fontsize);


				},this);
			}
		}
	});

	chart.scale = chart.element.extend({
		initialize : function(){
			this.fit();
		},
		buildylabels : function(){
			this.ylabels = [];

			var stepdecimalplaces = getdecimalplaces(this.stepvalue);

			for (var i=0; i<=this.steps; i++){
				this.ylabels.push(template(this.templatestring,{value:(this.min + (i * this.stepvalue)).tofixed(stepdecimalplaces)}));
			}
			this.ylabelwidth = (this.display && this.showlabels) ? longesttext(this.ctx,this.font,this.ylabels) + 10 : 0;
		},
		addxlabel : function(label){
			this.xlabels.push(label);
			this.valuescount++;
			this.fit();
		},
		removexlabel : function(){
			this.xlabels.shift();
			this.valuescount--;
			this.fit();
		},
		// fitting loop to rotate x labels and figure out what fits there, and also calculate how many y steps to use
		fit: function(){
			// first we need the width of the ylabels, assuming the xlabels aren't rotated

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

			// apply padding settings to the start and end point.
			this.startpoint += this.padding;
			this.endpoint -= this.padding;

			// cache the starting endpoint, excluding the space for x labels
			var cachedendpoint = this.endpoint;

			// cache the starting height, so can determine if we need to recalculate the scale yaxis
			var cachedheight = this.endpoint - this.startpoint,
				cachedylabelwidth;

			// build the current ylabels so we have an idea of what size they'll be to start
			/*
			 *	this sets what is returned from calculatescalerange as static properties of this class:
			 *
				this.steps;
				this.stepvalue;
				this.min;
				this.max;
			 *
			 */
			this.calculateyrange(cachedheight);

			// with these properties set we can now build the array of ylabels
			// and also the width of the largest ylabel
			this.buildylabels();

			this.calculatexlabelrotation();

			while((cachedheight > this.endpoint - this.startpoint)){
				cachedheight = this.endpoint - this.startpoint;
				cachedylabelwidth = this.ylabelwidth;

				this.calculateyrange(cachedheight);
				this.buildylabels();

				// only go through the xlabel loop again if the ylabel width has changed
				if (cachedylabelwidth < this.ylabelwidth){
					this.endpoint = cachedendpoint;
					this.calculatexlabelrotation();
				}
			}

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

			this.ctx.font = this.font;

			var firstwidth = this.ctx.measuretext(this.xlabels[0]).width,
				lastwidth = this.ctx.measuretext(this.xlabels[this.xlabels.length - 1]).width,
				firstrotated,
				lastrotated;


			this.xscalepaddingright = lastwidth/2 + 3;
			this.xscalepaddingleft = (firstwidth/2 > this.ylabelwidth) ? firstwidth/2 : this.ylabelwidth;

			this.xlabelrotation = 0;
			if (this.display){
				var originallabelwidth = longesttext(this.ctx,this.font,this.xlabels),
					cosrotation,
					firstrotatedwidth;
				this.xlabelwidth = originallabelwidth;
				//allow 3 pixels x2 padding either side for label readability
				var xgridwidth = math.floor(this.calculatex(1) - this.calculatex(0)) - 6;

				//max label rotate should be 90 - also act as a loop counter
				while ((this.xlabelwidth > xgridwidth && this.xlabelrotation === 0) || (this.xlabelwidth > xgridwidth && this.xlabelrotation <= 90 && this.xlabelrotation > 0)){
					cosrotation = math.cos(toradians(this.xlabelrotation));

					firstrotated = cosrotation * firstwidth;
					lastrotated = cosrotation * lastwidth;

					// we're right aligning the text now.
					if (firstrotated + this.fontsize / 2 > this.ylabelwidth){
						this.xscalepaddingleft = firstrotated + this.fontsize / 2;
					}
					this.xscalepaddingright = this.fontsize/2;


					this.xlabelrotation++;
					this.xlabelwidth = cosrotation * originallabelwidth;

				}
				if (this.xlabelrotation > 0){
					this.endpoint -= math.sin(toradians(this.xlabelrotation))*originallabelwidth + 3;
				}
			}
			else{
				this.xlabelwidth = 0;
				this.xscalepaddingright = this.padding;
				this.xscalepaddingleft = this.padding;
			}

		},
		// needs to be overidden in each chart type
		// otherwise we need to pass all the data into the scale class
		calculateyrange: noop,
		drawingarea: function(){
			return this.startpoint - this.endpoint;
		},
		calculatey : function(value){
			var scalingfactor = this.drawingarea() / (this.min - this.max);
			return this.endpoint - (scalingfactor * (value - this.min));
		},
		calculatex : function(index){
			var isrotated = (this.xlabelrotation > 0),
				// innerwidth = (this.offsetgridlines) ? this.width - offsetleft - this.padding : this.width - (offsetleft + halflabelwidth * 2) - this.padding,
				innerwidth = this.width - (this.xscalepaddingleft + this.xscalepaddingright),
				valuewidth = innerwidth/math.max((this.valuescount - ((this.offsetgridlines) ? 0 : 1)), 1),
				valueoffset = (valuewidth * index) + this.xscalepaddingleft;

			if (this.offsetgridlines){
				valueoffset += (valuewidth/2);
			}

			return math.round(valueoffset);
		},
		update : function(newprops){
			helpers.extend(this, newprops);
			this.fit();
		},
		draw : function(){
			var ctx = this.ctx,
				ylabelgap = (this.endpoint - this.startpoint) / this.steps,
				xstart = math.round(this.xscalepaddingleft);
			if (this.display){
				ctx.fillstyle = this.textcolor;
				ctx.font = this.font;
				each(this.ylabels,function(labelstring,index){
					var ylabelcenter = this.endpoint - (ylabelgap * index),
						linepositiony = math.round(ylabelcenter),
						drawhorizontalline = this.showhorizontallines;

					ctx.textalign = "right";
					ctx.textbaseline = "middle";
					if (this.showlabels){
						ctx.filltext(labelstring,xstart - 10,ylabelcenter);
					}

					// this is x axis, so draw it
					if (index === 0 && !drawhorizontalline){
						drawhorizontalline = true;
					}

					if (drawhorizontalline){
						ctx.beginpath();
					}

					if (index > 0){
						// this is a grid line in the centre, so drop that
						ctx.linewidth = this.gridlinewidth;
						ctx.strokestyle = this.gridlinecolor;
					} else {
						// this is the first line on the scale
						ctx.linewidth = this.linewidth;
						ctx.strokestyle = this.linecolor;
					}

					linepositiony += helpers.aliaspixel(ctx.linewidth);

					if(drawhorizontalline){
						ctx.moveto(xstart, linepositiony);
						ctx.lineto(this.width, linepositiony);
						ctx.stroke();
						ctx.closepath();
					}

					ctx.linewidth = this.linewidth;
					ctx.strokestyle = this.linecolor;
					ctx.beginpath();
					ctx.moveto(xstart - 5, linepositiony);
					ctx.lineto(xstart, linepositiony);
					ctx.stroke();
					ctx.closepath();

				},this);

				each(this.xlabels,function(label,index){
					var xpos = this.calculatex(index) + aliaspixel(this.linewidth),
						// check to see if line/bar here and decide where to place the line
						linepos = this.calculatex(index - (this.offsetgridlines ? 0.5 : 0)) + aliaspixel(this.linewidth),
						isrotated = (this.xlabelrotation > 0),
						drawverticalline = this.showverticallines;

					// this is y axis, so draw it
					if (index === 0 && !drawverticalline){
						drawverticalline = true;
					}

					if (drawverticalline){
						ctx.beginpath();
					}

					if (index > 0){
						// this is a grid line in the centre, so drop that
						ctx.linewidth = this.gridlinewidth;
						ctx.strokestyle = this.gridlinecolor;
					} else {
						// this is the first line on the scale
						ctx.linewidth = this.linewidth;
						ctx.strokestyle = this.linecolor;
					}

					if (drawverticalline){
						ctx.moveto(linepos,this.endpoint);
						ctx.lineto(linepos,this.startpoint - 3);
						ctx.stroke();
						ctx.closepath();
					}


					ctx.linewidth = this.linewidth;
					ctx.strokestyle = this.linecolor;


					// small lines at the bottom of the base grid line
					ctx.beginpath();
					ctx.moveto(linepos,this.endpoint);
					ctx.lineto(linepos,this.endpoint + 5);
					ctx.stroke();
					ctx.closepath();

					ctx.save();
					ctx.translate(xpos,(isrotated) ? this.endpoint + 12 : this.endpoint + 8);
					ctx.rotate(toradians(this.xlabelrotation)*-1);
					ctx.font = this.font;
					ctx.textalign = (isrotated) ? "right" : "center";
					ctx.textbaseline = (isrotated) ? "middle" : "top";
					ctx.filltext(label, 0, 0);
					ctx.restore();
				},this);

			}
		}

	});

	chart.radialscale = chart.element.extend({
		initialize: function(){
			this.size = min([this.height, this.width]);
			this.drawingarea = (this.display) ? (this.size/2) - (this.fontsize/2 + this.backdroppaddingy) : (this.size/2);
		},
		calculatecenteroffset: function(value){
			// take into account half font size + the ypadding of the top value
			var scalingfactor = this.drawingarea / (this.max - this.min);

			return (value - this.min) * scalingfactor;
		},
		update : function(){
			if (!this.linearc){
				this.setscalesize();
			} else {
				this.drawingarea = (this.display) ? (this.size/2) - (this.fontsize/2 + this.backdroppaddingy) : (this.size/2);
			}
			this.buildylabels();
		},
		buildylabels: function(){
			this.ylabels = [];

			var stepdecimalplaces = getdecimalplaces(this.stepvalue);

			for (var i=0; i<=this.steps; i++){
				this.ylabels.push(template(this.templatestring,{value:(this.min + (i * this.stepvalue)).tofixed(stepdecimalplaces)}));
			}
		},
		getcircumference : function(){
			return ((math.pi*2) / this.valuescount);
		},
		setscalesize: function(){
			/*
			 * right, this is really confusing and there is a lot of maths going on here
			 * the gist of the problem is here: https://gist.github.com/nnnick/696cc9c55f4b0beb8fe9
			 *
			 * reaction: https://dl.dropboxusercontent.com/u/34601363/toomuchscience.gif
			 *
			 * solution:
			 *
			 * we assume the radius of the polygon is half the size of the canvas at first
			 * at each index we check if the text overlaps.
			 *
			 * where it does, we store that angle and that index.
			 *
			 * after finding the largest index and angle we calculate how much we need to remove
			 * from the shape radius to move the point inwards by that x.
			 *
			 * we average the left and right distances to get the maximum shape radius that can fit in the box
			 * along with labels.
			 *
			 * once we have that, we can find the centre point for the chart, by taking the x text protrusion
			 * on each side, removing that from the size, halving it and adding the left x protrusion width.
			 *
			 * this will mean we have a shape fitted to the canvas, as large as it can be with the labels
			 * and position it in the most space efficient manner
			 *
			 * https://dl.dropboxusercontent.com/u/34601363/yeahscience.gif
			 */


			// get maximum radius of the polygon. either half the height (minus the text width) or half the width.
			// use this to calculate the offset + change. - make sure l/r protrusion is at least 0 to stop issues with centre points
			var largestpossibleradius = min([(this.height/2 - this.pointlabelfontsize - 5), this.width/2]),
				pointposition,
				i,
				textwidth,
				halftextwidth,
				furthestright = this.width,
				furthestrightindex,
				furthestrightangle,
				furthestleft = 0,
				furthestleftindex,
				furthestleftangle,
				xprotrusionleft,
				xprotrusionright,
				radiusreductionright,
				radiusreductionleft,
				maxwidthradius;
			this.ctx.font = fontstring(this.pointlabelfontsize,this.pointlabelfontstyle,this.pointlabelfontfamily);
			for (i=0;i<this.valuescount;i++){
				// 5px to space the text slightly out - similar to what we do in the draw function.
				pointposition = this.getpointposition(i, largestpossibleradius);
				textwidth = this.ctx.measuretext(template(this.templatestring, { value: this.labels[i] })).width + 5;
				if (i === 0 || i === this.valuescount/2){
					// if we're at index zero, or exactly the middle, we're at exactly the top/bottom
					// of the radar chart, so text will be aligned centrally, so we'll half it and compare
					// w/left and right text sizes
					halftextwidth = textwidth/2;
					if (pointposition.x + halftextwidth > furthestright) {
						furthestright = pointposition.x + halftextwidth;
						furthestrightindex = i;
					}
					if (pointposition.x - halftextwidth < furthestleft) {
						furthestleft = pointposition.x - halftextwidth;
						furthestleftindex = i;
					}
				}
				else if (i < this.valuescount/2) {
					// less than half the values means we'll left align the text
					if (pointposition.x + textwidth > furthestright) {
						furthestright = pointposition.x + textwidth;
						furthestrightindex = i;
					}
				}
				else if (i > this.valuescount/2){
					// more than half the values means we'll right align the text
					if (pointposition.x - textwidth < furthestleft) {
						furthestleft = pointposition.x - textwidth;
						furthestleftindex = i;
					}
				}
			}

			xprotrusionleft = furthestleft;

			xprotrusionright = math.ceil(furthestright - this.width);

			furthestrightangle = this.getindexangle(furthestrightindex);

			furthestleftangle = this.getindexangle(furthestleftindex);

			radiusreductionright = xprotrusionright / math.sin(furthestrightangle + math.pi/2);

			radiusreductionleft = xprotrusionleft / math.sin(furthestleftangle + math.pi/2);

			// ensure we actually need to reduce the size of the chart
			radiusreductionright = (isnumber(radiusreductionright)) ? radiusreductionright : 0;
			radiusreductionleft = (isnumber(radiusreductionleft)) ? radiusreductionleft : 0;

			this.drawingarea = largestpossibleradius - (radiusreductionleft + radiusreductionright)/2;

			//this.drawingarea = min([maxwidthradius, (this.height - (2 * (this.pointlabelfontsize + 5)))/2])
			this.setcenterpoint(radiusreductionleft, radiusreductionright);

		},
		setcenterpoint: function(leftmovement, rightmovement){

			var maxright = this.width - rightmovement - this.drawingarea,
				maxleft = leftmovement + this.drawingarea;

			this.xcenter = (maxleft + maxright)/2;
			// always vertically in the centre as the text height doesn't change
			this.ycenter = (this.height/2);
		},

		getindexangle : function(index){
			var anglemultiplier = (math.pi * 2) / this.valuescount;
			// start from the top instead of right, so remove a quarter of the circle

			return index * anglemultiplier - (math.pi/2);
		},
		getpointposition : function(index, distancefromcenter){
			var thisangle = this.getindexangle(index);
			return {
				x : (math.cos(thisangle) * distancefromcenter) + this.xcenter,
				y : (math.sin(thisangle) * distancefromcenter) + this.ycenter
			};
		},
		draw: function(){
			if (this.display){
				var ctx = this.ctx;
				each(this.ylabels, function(label, index){
					// don't draw a centre value
					if (index > 0){
						var ycenteroffset = index * (this.drawingarea/this.steps),
							yheight = this.ycenter - ycenteroffset,
							pointposition;

						// draw circular lines around the scale
						if (this.linewidth > 0){
							ctx.strokestyle = this.linecolor;
							ctx.linewidth = this.linewidth;

							if(this.linearc){
								ctx.beginpath();
								ctx.arc(this.xcenter, this.ycenter, ycenteroffset, 0, math.pi*2);
								ctx.closepath();
								ctx.stroke();
							} else{
								ctx.beginpath();
								for (var i=0;i<this.valuescount;i++)
								{
									pointposition = this.getpointposition(i, this.calculatecenteroffset(this.min + (index * this.stepvalue)));
									if (i === 0){
										ctx.moveto(pointposition.x, pointposition.y);
									} else {
										ctx.lineto(pointposition.x, pointposition.y);
									}
								}
								ctx.closepath();
								ctx.stroke();
							}
						}
						if(this.showlabels){
							ctx.font = fontstring(this.fontsize,this.fontstyle,this.fontfamily);
							if (this.showlabelbackdrop){
								var labelwidth = ctx.measuretext(label).width;
								ctx.fillstyle = this.backdropcolor;
								ctx.fillrect(
									this.xcenter - labelwidth/2 - this.backdroppaddingx,
									yheight - this.fontsize/2 - this.backdroppaddingy,
									labelwidth + this.backdroppaddingx*2,
									this.fontsize + this.backdroppaddingy*2
								);
							}
							ctx.textalign = 'center';
							ctx.textbaseline = "middle";
							ctx.fillstyle = this.fontcolor;
							ctx.filltext(label, this.xcenter, yheight);
						}
					}
				}, this);

				if (!this.linearc){
					ctx.linewidth = this.anglelinewidth;
					ctx.strokestyle = this.anglelinecolor;
					for (var i = this.valuescount - 1; i >= 0; i--) {
						var centeroffset = null, outerposition = null;

						if (this.anglelinewidth > 0){
							centeroffset = this.calculatecenteroffset(this.max);
							outerposition = this.getpointposition(i, centeroffset);
							ctx.beginpath();
							ctx.moveto(this.xcenter, this.ycenter);
							ctx.lineto(outerposition.x, outerposition.y);
							ctx.stroke();
							ctx.closepath();
						}

						if (this.backgroundcolors && this.backgroundcolors.length == this.valuescount) {
							if (centeroffset == null)
								centeroffset = this.calculatecenteroffset(this.max);

							if (outerposition == null)
								outerposition = this.getpointposition(i, centeroffset);

							var previousouterposition = this.getpointposition(i === 0 ? this.valuescount - 1 : i - 1, centeroffset);
							var nextouterposition = this.getpointposition(i === this.valuescount - 1 ? 0 : i + 1, centeroffset);

							var previousouterhalfway = { x: (previousouterposition.x + outerposition.x) / 2, y: (previousouterposition.y + outerposition.y) / 2 };
							var nextouterhalfway = { x: (outerposition.x + nextouterposition.x) / 2, y: (outerposition.y + nextouterposition.y) / 2 };

							ctx.beginpath();
							ctx.moveto(this.xcenter, this.ycenter);
							ctx.lineto(previousouterhalfway.x, previousouterhalfway.y);
							ctx.lineto(outerposition.x, outerposition.y);
							ctx.lineto(nextouterhalfway.x, nextouterhalfway.y);
							ctx.fillstyle = this.backgroundcolors[i];
							ctx.fill();
							ctx.closepath();
						}
						// extra 3px out for some label spacing
						var pointlabelposition = this.getpointposition(i, this.calculatecenteroffset(this.max) + 5);
						ctx.font = fontstring(this.pointlabelfontsize,this.pointlabelfontstyle,this.pointlabelfontfamily);
						ctx.fillstyle = this.pointlabelfontcolor;

						var labelscount = this.labels.length,
							halflabelscount = this.labels.length/2,
							quarterlabelscount = halflabelscount/2,
							upperhalf = (i < quarterlabelscount || i > labelscount - quarterlabelscount),
							exactquarter = (i === quarterlabelscount || i === labelscount - quarterlabelscount);
						if (i === 0){
							ctx.textalign = 'center';
						} else if(i === halflabelscount){
							ctx.textalign = 'center';
						} else if (i < halflabelscount){
							ctx.textalign = 'left';
						} else {
							ctx.textalign = 'right';
						}

						// set the correct text baseline based on outer positioning
						if (exactquarter){
							ctx.textbaseline = 'middle';
						} else if (upperhalf){
							ctx.textbaseline = 'bottom';
						} else {
							ctx.textbaseline = 'top';
						}

						ctx.filltext(this.labels[i], pointlabelposition.x, pointlabelposition.y);
					}
				}
			}
		}
	});

	chart.animationservice = {
		frameduration: 17,
		animations: [],
		dropframes: 0,
		addanimation: function(chartinstance, animationobject) {
			for (var index = 0; index < this.animations.length; ++ index){
				if (this.animations[index].chartinstance === chartinstance){
					// replacing an in progress animation
					this.animations[index].animationobject = animationobject;
					return;
				}
			}
			
			this.animations.push({
				chartinstance: chartinstance,
				animationobject: animationobject
			});

			// if there are no animations queued, manually kickstart a digest, for lack of a better word
			if (this.animations.length == 1) {
				helpers.requestanimframe.call(window, this.digestwrapper);
			}
		},
		// cancel the animation for a given chart instance
		cancelanimation: function(chartinstance) {
			var index = helpers.findnextwhere(this.animations, function(animationwrapper) {
				return animationwrapper.chartinstance === chartinstance;
			});
			
			if (index)
			{
				this.animations.splice(index, 1);
			}
		},
		// calls startdigest with the proper context
		digestwrapper: function() {
			chart.animationservice.startdigest.call(chart.animationservice);
		},
		startdigest: function() {

			var starttime = date.now();
			var framestodrop = 0;

			if(this.dropframes > 1){
				framestodrop = math.floor(this.dropframes);
				this.dropframes -= framestodrop;
			}

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

				if (this.animations[i].animationobject.currentstep === null){
					this.animations[i].animationobject.currentstep = 0;
				}

				this.animations[i].animationobject.currentstep += 1 + framestodrop;
				if(this.animations[i].animationobject.currentstep > this.animations[i].animationobject.numsteps){
					this.animations[i].animationobject.currentstep = this.animations[i].animationobject.numsteps;
				}
				
				this.animations[i].animationobject.render(this.animations[i].chartinstance, this.animations[i].animationobject);
				
				// check if executed the last frame.
				if (this.animations[i].animationobject.currentstep == this.animations[i].animationobject.numsteps){
					// call onanimationcomplete
					this.animations[i].animationobject.onanimationcomplete.call(this.animations[i].chartinstance);
					// remove the animation.
					this.animations.splice(i, 1);
					// keep the index in place to offset the splice
					i--;
				}
			}

			var endtime = date.now();
			var delay = endtime - starttime - this.frameduration;
			var framedelay = delay / this.frameduration;

			if(framedelay > 1){
				this.dropframes += framedelay;
			}

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

	// attach global event to resize each chart instance when the browser resizes
	helpers.addevent(window, "resize", (function(){
		// basic debounce of resize function so it doesn't hurt performance when resizing browser.
		var timeout;
		return function(){
			cleartimeout(timeout);
			timeout = settimeout(function(){
				each(chart.instances,function(instance){
					// if the responsive flag is set in the chart instance config
					// cascade the resize event down to the chart.
					if (instance.options.responsive){
						instance.resize(instance.render, true);
					}
				});
			}, 50);
		};
	})());


	if (amd) {
		define('chart', [], function(){
			return chart;
		});
	} else if (typeof module === 'object' && module.exports) {
		module.exports = chart;
	}

	root.chart = chart;

	chart.noconflict = function(){
		root.chart = previous;
		return chart;
	};

}).call(this);

(function(){
	"use strict";

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


	var defaultconfig = {
		//boolean - whether the scale should start at zero, or an order of magnitude down from the lowest value
		scalebeginatzero : true,

		//boolean - whether grid lines are shown across the chart
		scaleshowgridlines : true,

		//string - colour of the grid lines
		scalegridlinecolor : "rgba(0,0,0,.05)",

		//number - width of the grid lines
		scalegridlinewidth : 1,

		//boolean - whether to show horizontal lines (except x axis)
		scaleshowhorizontallines: true,

		//boolean - whether to show vertical lines (except y axis)
		scaleshowverticallines: true,

		//boolean - if there is a stroke on each bar
		barshowstroke : true,

		//number - pixel width of the bar stroke
		barstrokewidth : 2,

		//number - spacing between each of the x value sets
		barvaluespacing : 5,

		//number - spacing between data sets within x values
		bardatasetspacing : 1,

		//string - a legend template
		legendtemplate : "<ul class=\"<%=name.tolowercase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span style=\"background-color:<%=datasets[i].fillcolor%>\"><%if(datasets[i].label){%><%=datasets[i].label%><%}%></span></li><%}%></ul>"

	};


	chart.type.extend({
		name: "bar",
		defaults : defaultconfig,
		initialize:  function(data){

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

			this.scaleclass = chart.scale.extend({
				offsetgridlines : true,
				calculatebarx : function(datasetcount, datasetindex, barindex){
					//reusable method for calculating the xposition of a given bar based on datasetindex & width of the bar
					var xwidth = this.calculatebasewidth(),
						xabsolute = this.calculatex(barindex) - (xwidth/2),
						barwidth = this.calculatebarwidth(datasetcount);

					return xabsolute + (barwidth * datasetindex) + (datasetindex * options.bardatasetspacing) + barwidth/2;
				},
				calculatebasewidth : function(){
					return (this.calculatex(1) - this.calculatex(0)) - (2*options.barvaluespacing);
				},
				calculatebarwidth : function(datasetcount){
					//the padding between datasets is to the right of each bar, providing that there are more than 1 dataset
					var basewidth = this.calculatebasewidth() - ((datasetcount - 1) * options.bardatasetspacing);

					return (basewidth / datasetcount);
				}
			});

			this.datasets = [];

			//set up tooltip events on the chart
			if (this.options.showtooltips){
				helpers.bindevents(this, this.options.tooltipevents, function(evt){
					var activebars = (evt.type !== 'mouseout') ? this.getbarsatevent(evt) : [];

					this.eachbars(function(bar){
						bar.restore(['fillcolor', 'strokecolor']);
					});
					helpers.each(activebars, function(activebar){
						activebar.fillcolor = activebar.highlightfill;
						activebar.strokecolor = activebar.highlightstroke;
					});
					this.showtooltip(activebars);
				});
			}

			//declare the extension of the default point, to cater for the options passed in to the constructor
			this.barclass = chart.rectangle.extend({
				strokewidth : this.options.barstrokewidth,
				showstroke : this.options.barshowstroke,
				ctx : this.chart.ctx
			});

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

				var datasetobject = {
					label : dataset.label || null,
					fillcolor : dataset.fillcolor,
					strokecolor : dataset.strokecolor,
					bars : []
				};

				this.datasets.push(datasetobject);

				helpers.each(dataset.data,function(datapoint,index){
					//add a new point for each piece of data, passing any required data to draw.
					datasetobject.bars.push(new this.barclass({
						value : datapoint,
						label : data.labels[index],
						datasetlabel: dataset.label,
						strokecolor : dataset.strokecolor,
						fillcolor : dataset.fillcolor,
						highlightfill : dataset.highlightfill || dataset.fillcolor,
						highlightstroke : dataset.highlightstroke || dataset.strokecolor
					}));
				},this);

			},this);

			this.buildscale(data.labels);

			this.barclass.prototype.base = this.scale.endpoint;

			this.eachbars(function(bar, index, datasetindex){
				helpers.extend(bar, {
					width : this.scale.calculatebarwidth(this.datasets.length),
					x: this.scale.calculatebarx(this.datasets.length, datasetindex, index),
					y: this.scale.endpoint
				});
				bar.save();
			}, this);

			this.render();
		},
		update : function(){
			this.scale.update();
			// reset any highlight colours before updating.
			helpers.each(this.activeelements, function(activeelement){
				activeelement.restore(['fillcolor', 'strokecolor']);
			});

			this.eachbars(function(bar){
				bar.save();
			});
			this.render();
		},
		eachbars : function(callback){
			helpers.each(this.datasets,function(dataset, datasetindex){
				helpers.each(dataset.bars, callback, this, datasetindex);
			},this);
		},
		getbarsatevent : function(e){
			var barsarray = [],
				eventposition = helpers.getrelativeposition(e),
				datasetiterator = function(dataset){
					barsarray.push(dataset.bars[barindex]);
				},
				barindex;

			for (var datasetindex = 0; datasetindex < this.datasets.length; datasetindex++) {
				for (barindex = 0; barindex < this.datasets[datasetindex].bars.length; barindex++) {
					if (this.datasets[datasetindex].bars[barindex].inrange(eventposition.x,eventposition.y)){
						helpers.each(this.datasets, datasetiterator);
						return barsarray;
					}
				}
			}

			return barsarray;
		},
		buildscale : function(labels){
			var self = this;

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

			var scaleoptions = {
				templatestring : this.options.scalelabel,
				height : this.chart.height,
				width : this.chart.width,
				ctx : this.chart.ctx,
				textcolor : this.options.scalefontcolor,
				fontsize : this.options.scalefontsize,
				fontstyle : this.options.scalefontstyle,
				fontfamily : this.options.scalefontfamily,
				valuescount : labels.length,
				beginatzero : this.options.scalebeginatzero,
				integersonly : this.options.scaleintegersonly,
				calculateyrange: function(currentheight){
					var updatedranges = helpers.calculatescalerange(
						datatotal(),
						currentheight,
						this.fontsize,
						this.beginatzero,
						this.integersonly
					);
					helpers.extend(this, updatedranges);
				},
				xlabels : labels,
				font : helpers.fontstring(this.options.scalefontsize, this.options.scalefontstyle, this.options.scalefontfamily),
				linewidth : this.options.scalelinewidth,
				linecolor : this.options.scalelinecolor,
				showhorizontallines : this.options.scaleshowhorizontallines,
				showverticallines : this.options.scaleshowverticallines,
				gridlinewidth : (this.options.scaleshowgridlines) ? this.options.scalegridlinewidth : 0,
				gridlinecolor : (this.options.scaleshowgridlines) ? this.options.scalegridlinecolor : "rgba(0,0,0,0)",
				padding : (this.options.showscale) ? 0 : (this.options.barshowstroke) ? this.options.barstrokewidth : 0,
				showlabels : this.options.scaleshowlabels,
				display : this.options.showscale
			};

			if (this.options.scaleoverride){
				helpers.extend(scaleoptions, {
					calculateyrange: helpers.noop,
					steps: this.options.scalesteps,
					stepvalue: this.options.scalestepwidth,
					min: this.options.scalestartvalue,
					max: this.options.scalestartvalue + (this.options.scalesteps * this.options.scalestepwidth)
				});
			}

			this.scale = new this.scaleclass(scaleoptions);
		},
		adddata : function(valuesarray,label){
			//map the values array for each of the datasets
			helpers.each(valuesarray,function(value,datasetindex){
				//add a new point for each piece of data, passing any required data to draw.
				this.datasets[datasetindex].bars.push(new this.barclass({
					value : value,
					label : label,
					datasetlabel: this.datasets[datasetindex].label,
					x: this.scale.calculatebarx(this.datasets.length, datasetindex, this.scale.valuescount+1),
					y: this.scale.endpoint,
					width : this.scale.calculatebarwidth(this.datasets.length),
					base : this.scale.endpoint,
					strokecolor : this.datasets[datasetindex].strokecolor,
					fillcolor : this.datasets[datasetindex].fillcolor
				}));
			},this);

			this.scale.addxlabel(label);
			//then re-render the chart.
			this.update();
		},
		removedata : function(){
			this.scale.removexlabel();
			//then re-render the chart.
			helpers.each(this.datasets,function(dataset){
				dataset.bars.shift();
			},this);
			this.update();
		},
		reflow : function(){
			helpers.extend(this.barclass.prototype,{
				y: this.scale.endpoint,
				base : this.scale.endpoint
			});
			var newscaleprops = helpers.extend({
				height : this.chart.height,
				width : this.chart.width
			});
			this.scale.update(newscaleprops);
		},
		draw : function(ease){
			var easingdecimal = ease || 1;
			this.clear();

			var ctx = this.chart.ctx;

			this.scale.draw(easingdecimal);

			//draw all the bars for each dataset
			helpers.each(this.datasets,function(dataset,datasetindex){
				helpers.each(dataset.bars,function(bar,index){
					if (bar.hasvalue()){
						bar.base = this.scale.endpoint;
						//transition then draw
						bar.transition({
							x : this.scale.calculatebarx(this.datasets.length, datasetindex, index),
							y : this.scale.calculatey(bar.value),
							width : this.scale.calculatebarwidth(this.datasets.length)
						}, easingdecimal).draw();
					}
				},this);

			},this);
		}
	});


}).call(this);

(function(){
	"use strict";

	var root = this,
		chart = root.chart,
		//cache a local reference to chart.helpers
		helpers = chart.helpers;

	var defaultconfig = {
		//boolean - whether we should show a stroke on each segment
		segmentshowstroke : true,

		//string - the colour of each segment stroke
		segmentstrokecolor : "#fff",

		//number - the width of each segment stroke
		segmentstrokewidth : 2,

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

		//number - amount of animation steps
		animationsteps : 100,

		//string - animation easing effect
		animationeasing : "easeoutbounce",

		//boolean - whether we animate the rotation of the doughnut
		animaterotate : true,

		//boolean - whether we animate scaling the doughnut from the centre
		animatescale : false,

		//string - a legend template
		legendtemplate : "<ul class=\"<%=name.tolowercase()%>-legend\"><% for (var i=0; i<segments.length; i++){%><li><span style=\"background-color:<%=segments[i].fillcolor%>\"><%if(segments[i].label){%><%=segments[i].label%><%}%></span></li><%}%></ul>"

	};

	chart.type.extend({
		//passing in a name registers this chart in the chart namespace
		name: "doughnut",
		//providing a defaults will also register the deafults in the chart namespace
		defaults : defaultconfig,
		//initialize is fired when the chart is initialized - data is passed in as a parameter
		//config is automatically merged by the core of chart.js, and is available at this.options
		initialize:  function(data){

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

			this.segmentarc = chart.arc.extend({
				ctx : this.chart.ctx,
				x : this.chart.width/2,
				y : this.chart.height/2
			});

			//set up tooltip events on the chart
			if (this.options.showtooltips){
				helpers.bindevents(this, this.options.tooltipevents, function(evt){
					var activesegments = (evt.type !== 'mouseout') ? this.getsegmentsatevent(evt) : [];

					helpers.each(this.segments,function(segment){
						segment.restore(["fillcolor"]);
					});
					helpers.each(activesegments,function(activesegment){
						activesegment.fillcolor = activesegment.highlightcolor;
					});
					this.showtooltip(activesegments);
				});
			}
			this.calculatetotal(data);

			helpers.each(data,function(datapoint, index){
				if (!datapoint.color) {
					datapoint.color = 'hsl(' + (360 * index / data.length) + ', 100%, 50%)';
				}
				this.adddata(datapoint, index, true);
			},this);

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

			var location = helpers.getrelativeposition(e);

			helpers.each(this.segments,function(segment){
				if (segment.inrange(location.x,location.y)) segmentsarray.push(segment);
			},this);
			return segmentsarray;
		},
		adddata : function(segment, atindex, silent){
			var index = atindex !== undefined ? atindex : this.segments.length;
			if ( typeof(segment.color) === "undefined" ) {
				segment.color = chart.defaults.global.segmentcolordefault[index % chart.defaults.global.segmentcolordefault.length];
				segment.highlight = chart.defaults.global.segmenthighlightcolordefaults[index % chart.defaults.global.segmenthighlightcolordefaults.length];				
			}
			this.segments.splice(index, 0, new this.segmentarc({
				value : segment.value,
				outerradius : (this.options.animatescale) ? 0 : this.outerradius,
				innerradius : (this.options.animatescale) ? 0 : (this.outerradius/100) * this.options.percentageinnercutout,
				fillcolor : segment.color,
				highlightcolor : segment.highlight || segment.color,
				showstroke : this.options.segmentshowstroke,
				strokewidth : this.options.segmentstrokewidth,
				strokecolor : this.options.segmentstrokecolor,
				startangle : math.pi * 1.5,
				circumference : (this.options.animaterotate) ? 0 : this.calculatecircumference(segment.value),
				label : segment.label
			}));
			if (!silent){
				this.reflow();
				this.update();
			}
		},
		calculatecircumference : function(value) {
			if ( this.total > 0 ) {
				return (math.pi*2)*(value / this.total);
			} else {
				return 0;
			}
		},
		calculatetotal : function(data){
			this.total = 0;
			helpers.each(data,function(segment){
				this.total += math.abs(segment.value);
			},this);
		},
		update : function(){
			this.calculatetotal(this.segments);

			// reset any highlight colours before updating.
			helpers.each(this.activeelements, function(activeelement){
				activeelement.restore(['fillcolor']);
			});

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

		removedata: function(atindex){
			var indextodelete = (helpers.isnumber(atindex)) ? atindex : this.segments.length-1;
			this.segments.splice(indextodelete, 1);
			this.reflow();
			this.update();
		},

		reflow : function(){
			helpers.extend(this.segmentarc.prototype,{
				x : this.chart.width/2,
				y : this.chart.height/2
			});
			this.outerradius = (helpers.min([this.chart.width,this.chart.height]) -	this.options.segmentstrokewidth/2)/2;
			helpers.each(this.segments, function(segment){
				segment.update({
					outerradius : this.outerradius,
					innerradius : (this.outerradius/100) * this.options.percentageinnercutout
				});
			}, this);
		},
		draw : function(easedecimal){
			var animdecimal = (easedecimal) ? easedecimal : 1;
			this.clear();
			helpers.each(this.segments,function(segment,index){
				segment.transition({
					circumference : this.calculatecircumference(segment.value),
					outerradius : this.outerradius,
					innerradius : (this.outerradius/100) * this.options.percentageinnercutout
				},animdecimal);

				segment.endangle = segment.startangle + segment.circumference;

				segment.draw();
				if (index === 0){
					segment.startangle = math.pi * 1.5;
				}
				//check to see if it's the last segment, if not get the next and update the start angle
				if (index < this.segments.length-1){
					this.segments[index+1].startangle = segment.endangle;
				}
			},this);

		}
	});

	chart.types.doughnut.extend({
		name : "pie",
		defaults : helpers.merge(defaultconfig,{percentageinnercutout : 0})
	});

}).call(this);

(function(){
	"use strict";

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

	var defaultconfig = {

		///boolean - whether grid lines are shown across the chart
		scaleshowgridlines : true,

		//string - colour of the grid lines
		scalegridlinecolor : "rgba(0,0,0,.05)",

		//number - width of the grid lines
		scalegridlinewidth : 1,

		//boolean - whether to show horizontal lines (except x axis)
		scaleshowhorizontallines: true,

		//boolean - whether to show vertical lines (except y axis)
		scaleshowverticallines: true,

		//boolean - whether the line is curved between points
		beziercurve : true,

		//number - tension of the bezier curve between points
		beziercurvetension : 0.4,

		//boolean - whether to show a dot for each point
		pointdot : true,

		//number - radius of each point dot in pixels
		pointdotradius : 4,

		//number - pixel width of point dot stroke
		pointdotstrokewidth : 1,

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

		//boolean - whether to show a stroke for datasets
		datasetstroke : true,

		//number - pixel width of dataset stroke
		datasetstrokewidth : 2,

		//boolean - whether to fill the dataset with a colour
		datasetfill : true,

		//string - a legend template
		legendtemplate : "<ul class=\"<%=name.tolowercase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span style=\"background-color:<%=datasets[i].strokecolor%>\"><%if(datasets[i].label){%><%=datasets[i].label%><%}%></span></li><%}%></ul>",

		//boolean - whether to horizontally center the label and point dot inside the grid
		offsetgridlines : false

	};


	chart.type.extend({
		name: "line",
		defaults : defaultconfig,
		initialize:  function(data){
			//declare the extension of the default point, to cater for the options passed in to the constructor
			this.pointclass = chart.point.extend({
				offsetgridlines : this.options.offsetgridlines,
				strokewidth : this.options.pointdotstrokewidth,
				radius : this.options.pointdotradius,
				display: this.options.pointdot,
				hitdetectionradius : this.options.pointhitdetectionradius,
				ctx : this.chart.ctx,
				inrange : function(mousex){
					return (math.pow(mousex-this.x, 2) < math.pow(this.radius + this.hitdetectionradius,2));
				}
			});

			this.datasets = [];

			//set up tooltip events on the chart
			if (this.options.showtooltips){
				helpers.bindevents(this, this.options.tooltipevents, function(evt){
					var activepoints = (evt.type !== 'mouseout') ? this.getpointsatevent(evt) : [];
					this.eachpoints(function(point){
						point.restore(['fillcolor', 'strokecolor']);
					});
					helpers.each(activepoints, function(activepoint){
						activepoint.fillcolor = activepoint.highlightfill;
						activepoint.strokecolor = activepoint.highlightstroke;
					});
					this.showtooltip(activepoints);
				});
			}

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

				var datasetobject = {
					label : dataset.label || null,
					fillcolor : dataset.fillcolor,
					strokecolor : dataset.strokecolor,
					pointcolor : dataset.pointcolor,
					pointstrokecolor : dataset.pointstrokecolor,
					points : []
				};

				this.datasets.push(datasetobject);


				helpers.each(dataset.data,function(datapoint,index){
					//add a new point for each piece of data, passing any required data to draw.
					datasetobject.points.push(new this.pointclass({
						value : datapoint,
						label : data.labels[index],
						datasetlabel: dataset.label,
						strokecolor : dataset.pointstrokecolor,
						fillcolor : dataset.pointcolor,
						highlightfill : dataset.pointhighlightfill || dataset.pointcolor,
						highlightstroke : dataset.pointhighlightstroke || dataset.pointstrokecolor
					}));
				},this);

				this.buildscale(data.labels);


				this.eachpoints(function(point, index){
					helpers.extend(point, {
						x: this.scale.calculatex(index),
						y: this.scale.endpoint
					});
					point.save();
				}, this);

			},this);


			this.render();
		},
		update : function(){
			this.scale.update();
			// reset any highlight colours before updating.
			helpers.each(this.activeelements, function(activeelement){
				activeelement.restore(['fillcolor', 'strokecolor']);
			});
			this.eachpoints(function(point){
				point.save();
			});
			this.render();
		},
		eachpoints : function(callback){
			helpers.each(this.datasets,function(dataset){
				helpers.each(dataset.points,callback,this);
			},this);
		},
		getpointsatevent : function(e){
			var pointsarray = [],
				eventposition = helpers.getrelativeposition(e);
			helpers.each(this.datasets,function(dataset){
				helpers.each(dataset.points,function(point){
					if (point.inrange(eventposition.x,eventposition.y)) pointsarray.push(point);
				});
			},this);
			return pointsarray;
		},
		buildscale : function(labels){
			var self = this;

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

				return values;
			};

			var scaleoptions = {
				templatestring : this.options.scalelabel,
				height : this.chart.height,
				width : this.chart.width,
				ctx : this.chart.ctx,
				textcolor : this.options.scalefontcolor,
				offsetgridlines : this.options.offsetgridlines,
				fontsize : this.options.scalefontsize,
				fontstyle : this.options.scalefontstyle,
				fontfamily : this.options.scalefontfamily,
				valuescount : labels.length,
				beginatzero : this.options.scalebeginatzero,
				integersonly : this.options.scaleintegersonly,
				calculateyrange : function(currentheight){
					var updatedranges = helpers.calculatescalerange(
						datatotal(),
						currentheight,
						this.fontsize,
						this.beginatzero,
						this.integersonly
					);
					helpers.extend(this, updatedranges);
				},
				xlabels : labels,
				font : helpers.fontstring(this.options.scalefontsize, this.options.scalefontstyle, this.options.scalefontfamily),
				linewidth : this.options.scalelinewidth,
				linecolor : this.options.scalelinecolor,
				showhorizontallines : this.options.scaleshowhorizontallines,
				showverticallines : this.options.scaleshowverticallines,
				gridlinewidth : (this.options.scaleshowgridlines) ? this.options.scalegridlinewidth : 0,
				gridlinecolor : (this.options.scaleshowgridlines) ? this.options.scalegridlinecolor : "rgba(0,0,0,0)",
				padding: (this.options.showscale) ? 0 : this.options.pointdotradius + this.options.pointdotstrokewidth,
				showlabels : this.options.scaleshowlabels,
				display : this.options.showscale
			};

			if (this.options.scaleoverride){
				helpers.extend(scaleoptions, {
					calculateyrange: helpers.noop,
					steps: this.options.scalesteps,
					stepvalue: this.options.scalestepwidth,
					min: this.options.scalestartvalue,
					max: this.options.scalestartvalue + (this.options.scalesteps * this.options.scalestepwidth)
				});
			}


			this.scale = new chart.scale(scaleoptions);
		},
		adddata : function(valuesarray,label){
			//map the values array for each of the datasets

			helpers.each(valuesarray,function(value,datasetindex){
				//add a new point for each piece of data, passing any required data to draw.
				this.datasets[datasetindex].points.push(new this.pointclass({
					value : value,
					label : label,
					datasetlabel: this.datasets[datasetindex].label,
					x: this.scale.calculatex(this.scale.valuescount+1),
					y: this.scale.endpoint,
					strokecolor : this.datasets[datasetindex].pointstrokecolor,
					fillcolor : this.datasets[datasetindex].pointcolor
				}));
			},this);

			this.scale.addxlabel(label);
			//then re-render the chart.
			this.update();
		},
		removedata : function(){
			this.scale.removexlabel();
			//then re-render the chart.
			helpers.each(this.datasets,function(dataset){
				dataset.points.shift();
			},this);
			this.update();
		},
		reflow : function(){
			var newscaleprops = helpers.extend({
				height : this.chart.height,
				width : this.chart.width
			});
			this.scale.update(newscaleprops);
		},
		draw : function(ease){
			var easingdecimal = ease || 1;
			this.clear();

			var ctx = this.chart.ctx;

			// some helper methods for getting the next/prev points
			var hasvalue = function(item){
				return item.value !== null;
			},
			nextpoint = function(point, collection, index){
				return helpers.findnextwhere(collection, hasvalue, index) || point;
			},
			previouspoint = function(point, collection, index){
				return helpers.findpreviouswhere(collection, hasvalue, index) || point;
			};

			if (!this.scale) return;
			this.scale.draw(easingdecimal);


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

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

				helpers.each(dataset.points, function(point, index){
					if (point.hasvalue()){
						point.transition({
							y : this.scale.calculatey(point.value),
							x : this.scale.calculatex(index)
						}, easingdecimal);
					}
				},this);


				// control points need to be calculated in a separate loop, because we need to know the current x/y of the point
				// this would cause issues when there is no animation, because the y of the next point would be 0, so beziers would be skewed
				if (this.options.beziercurve){
					helpers.each(pointswithvalues, function(point, index){
						var tension = (index > 0 && index < pointswithvalues.length - 1) ? this.options.beziercurvetension : 0;
						point.controlpoints = helpers.splinecurve(
							previouspoint(point, pointswithvalues, index),
							point,
							nextpoint(point, pointswithvalues, index),
							tension
						);

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

						// cap puter bezier handles to the upper/lower scale bounds
						if (point.controlpoints.outer.y > this.scale.endpoint){
							point.controlpoints.outer.y = this.scale.endpoint;
						}
						else if (point.controlpoints.outer.y < this.scale.startpoint){
							point.controlpoints.outer.y = this.scale.startpoint;
						}

						// cap inner bezier handles to the upper/lower scale bounds
						if (point.controlpoints.inner.y > this.scale.endpoint){
							point.controlpoints.inner.y = this.scale.endpoint;
						}
						else if (point.controlpoints.inner.y < this.scale.startpoint){
							point.controlpoints.inner.y = this.scale.startpoint;
						}
					},this);
				}


				//draw the line between all the points
				ctx.linewidth = this.options.datasetstrokewidth;
				ctx.strokestyle = dataset.strokecolor;
				ctx.beginpath();

				helpers.each(pointswithvalues, function(point, index){
					if (index === 0){
						ctx.moveto(point.x, point.y);
					}
					else{
						if(this.options.beziercurve){
							var previous = previouspoint(point, pointswithvalues, index);

							ctx.beziercurveto(
								previous.controlpoints.outer.x,
								previous.controlpoints.outer.y,
								point.controlpoints.inner.x,
								point.controlpoints.inner.y,
								point.x,
								point.y
							);
						}
						else{
							ctx.lineto(point.x,point.y);
						}
					}
				}, this);

				if (this.options.datasetstroke) {
					ctx.stroke();
				}

				if (this.options.datasetfill && pointswithvalues.length > 0){
					//round off the line by going to the base of the chart, back to the start, then fill.
					ctx.lineto(pointswithvalues[pointswithvalues.length - 1].x, this.scale.endpoint);
					ctx.lineto(pointswithvalues[0].x, this.scale.endpoint);
					ctx.fillstyle = dataset.fillcolor;
					ctx.closepath();
					ctx.fill();
				}

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


}).call(this);

(function(){
	"use strict";

	var root = this,
		chart = root.chart,
		//cache a local reference to chart.helpers
		helpers = chart.helpers;

	var defaultconfig = {
		//boolean - show a backdrop to the scale label
		scaleshowlabelbackdrop : true,

		//string - the colour of the label backdrop
		scalebackdropcolor : "rgba(255,255,255,0.75)",

		// boolean - whether the scale should begin at zero
		scalebeginatzero : true,

		//number - the backdrop padding above & below the label in pixels
		scalebackdroppaddingy : 2,

		//number - the backdrop padding to the side of the label in pixels
		scalebackdroppaddingx : 2,

		//boolean - show line for each value in the scale
		scaleshowline : true,

		//boolean - stroke a line around each segment in the chart
		segmentshowstroke : true,

		//string - the colour of the stroke on each segment.
		segmentstrokecolor : "#fff",

		//number - the width of the stroke value in pixels
		segmentstrokewidth : 2,

		//number - amount of animation steps
		animationsteps : 100,

		//string - animation easing effect.
		animationeasing : "easeoutbounce",

		//boolean - whether to animate the rotation of the chart
		animaterotate : true,

		//boolean - whether to animate scaling the chart from the centre
		animatescale : false,

		//string - a legend template
		legendtemplate : "<ul class=\"<%=name.tolowercase()%>-legend\"><% for (var i=0; i<segments.length; i++){%><li><span style=\"background-color:<%=segments[i].fillcolor%>\"><%if(segments[i].label){%><%=segments[i].label%><%}%></span></li><%}%></ul>"
	};


	chart.type.extend({
		//passing in a name registers this chart in the chart namespace
		name: "polararea",
		//providing a defaults will also register the deafults in the chart namespace
		defaults : defaultconfig,
		//initialize is fired when the chart is initialized - data is passed in as a parameter
		//config is automatically merged by the core of chart.js, and is available at this.options
		initialize:  function(data){
			this.segments = [];
			//declare segment class as a chart instance specific class, so it can share props for this instance
			this.segmentarc = chart.arc.extend({
				showstroke : this.options.segmentshowstroke,
				strokewidth : this.options.segmentstrokewidth,
				strokecolor : this.options.segmentstrokecolor,
				ctx : this.chart.ctx,
				innerradius : 0,
				x : this.chart.width/2,
				y : this.chart.height/2
			});
			this.scale = new chart.radialscale({
				display: this.options.showscale,
				fontstyle: this.options.scalefontstyle,
				fontsize: this.options.scalefontsize,
				fontfamily: this.options.scalefontfamily,
				fontcolor: this.options.scalefontcolor,
				showlabels: this.options.scaleshowlabels,
				showlabelbackdrop: this.options.scaleshowlabelbackdrop,
				backdropcolor: this.options.scalebackdropcolor,
				backdroppaddingy : this.options.scalebackdroppaddingy,
				backdroppaddingx: this.options.scalebackdroppaddingx,
				linewidth: (this.options.scaleshowline) ? this.options.scalelinewidth : 0,
				linecolor: this.options.scalelinecolor,
				linearc: true,
				width: this.chart.width,
				height: this.chart.height,
				xcenter: this.chart.width/2,
				ycenter: this.chart.height/2,
				ctx : this.chart.ctx,
				templatestring: this.options.scalelabel,
				valuescount: data.length
			});

			this.updatescalerange(data);

			this.scale.update();

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

			//set up tooltip events on the chart
			if (this.options.showtooltips){
				helpers.bindevents(this, this.options.tooltipevents, function(evt){
					var activesegments = (evt.type !== 'mouseout') ? this.getsegmentsatevent(evt) : [];
					helpers.each(this.segments,function(segment){
						segment.restore(["fillcolor"]);
					});
					helpers.each(activesegments,function(activesegment){
						activesegment.fillcolor = activesegment.highlightcolor;
					});
					this.showtooltip(activesegments);
				});
			}

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

			var location = helpers.getrelativeposition(e);

			helpers.each(this.segments,function(segment){
				if (segment.inrange(location.x,location.y)) segmentsarray.push(segment);
			},this);
			return segmentsarray;
		},
		adddata : function(segment, atindex, silent){
			var index = atindex || this.segments.length;

			this.segments.splice(index, 0, new this.segmentarc({
				fillcolor: segment.color,
				highlightcolor: segment.highlight || segment.color,
				label: segment.label,
				value: segment.value,
				outerradius: (this.options.animatescale) ? 0 : this.scale.calculatecenteroffset(segment.value),
				circumference: (this.options.animaterotate) ? 0 : this.scale.getcircumference(),
				startangle: math.pi * 1.5
			}));
			if (!silent){
				this.reflow();
				this.update();
			}
		},
		removedata: function(atindex){
			var indextodelete = (helpers.isnumber(atindex)) ? atindex : this.segments.length-1;
			this.segments.splice(indextodelete, 1);
			this.reflow();
			this.update();
		},
		calculatetotal: function(data){
			this.total = 0;
			helpers.each(data,function(segment){
				this.total += segment.value;
			},this);
			this.scale.valuescount = this.segments.length;
		},
		updatescalerange: function(datapoints){
			var valuesarray = [];
			helpers.each(datapoints,function(segment){
				valuesarray.push(segment.value);
			});

			var scalesizes = (this.options.scaleoverride) ?
				{
					steps: this.options.scalesteps,
					stepvalue: this.options.scalestepwidth,
					min: this.options.scalestartvalue,
					max: this.options.scalestartvalue + (this.options.scalesteps * this.options.scalestepwidth)
				} :
				helpers.calculatescalerange(
					valuesarray,
					helpers.min([this.chart.width, this.chart.height])/2,
					this.options.scalefontsize,
					this.options.scalebeginatzero,
					this.options.scaleintegersonly
				);

			helpers.extend(
				this.scale,
				scalesizes,
				{
					size: helpers.min([this.chart.width, this.chart.height]),
					xcenter: this.chart.width/2,
					ycenter: this.chart.height/2
				}
			);

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

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

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

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

		},
		draw : function(ease){
			var easingdecimal = ease || 1;
			//clear & draw the canvas
			this.clear();
			helpers.each(this.segments,function(segment, index){
				segment.transition({
					circumference : this.scale.getcircumference(),
					outerradius : this.scale.calculatecenteroffset(segment.value)
				},easingdecimal);

				segment.endangle = segment.startangle + segment.circumference;

				// if we've removed the first segment we need to set the first one to
				// start at the top.
				if (index === 0){
					segment.startangle = math.pi * 1.5;
				}

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

}).call(this);

(function(){
	"use strict";

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



	chart.type.extend({
		name: "radar",
		defaults:{
			//boolean - whether to show lines for each scale point
			scaleshowline : true,

			//boolean - whether we show the angle lines out of the radar
			angleshowlineout : true,

			//boolean - whether to show labels on the scale
			scaleshowlabels : false,

			// boolean - whether the scale should begin at zero
			scalebeginatzero : true,

			//string - colour of the angle line
			anglelinecolor : "rgba(0,0,0,.1)",

			//number - pixel width of the angle line
			anglelinewidth : 1,

			//string - point label font declaration
			pointlabelfontfamily : "'arial'",

			//string - point label font weight
			pointlabelfontstyle : "normal",

			//number - point label font size in pixels
			pointlabelfontsize : 10,

			//string - point label font colour
			pointlabelfontcolor : "#666",

			//boolean - whether to show a dot for each point
			pointdot : true,

			//number - radius of each point dot in pixels
			pointdotradius : 3,

			//number - pixel width of point dot stroke
			pointdotstrokewidth : 1,

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

			//boolean - whether to show a stroke for datasets
			datasetstroke : true,

			//number - pixel width of dataset stroke
			datasetstrokewidth : 2,

			//boolean - whether to fill the dataset with a colour
			datasetfill : true,

			//string - a legend template
			legendtemplate : "<ul class=\"<%=name.tolowercase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span style=\"background-color:<%=datasets[i].strokecolor%>\"><%if(datasets[i].label){%><%=datasets[i].label%><%}%></span></li><%}%></ul>"

		},

		initialize: function(data){
			this.pointclass = chart.point.extend({
				strokewidth : this.options.pointdotstrokewidth,
				radius : this.options.pointdotradius,
				display: this.options.pointdot,
				hitdetectionradius : this.options.pointhitdetectionradius,
				ctx : this.chart.ctx
			});

			this.datasets = [];

			this.buildscale(data);

			//set up tooltip events on the chart
			if (this.options.showtooltips){
				helpers.bindevents(this, this.options.tooltipevents, function(evt){
					var activepointscollection = (evt.type !== 'mouseout') ? this.getpointsatevent(evt) : [];

					this.eachpoints(function(point){
						point.restore(['fillcolor', 'strokecolor']);
					});
					helpers.each(activepointscollection, function(activepoint){
						activepoint.fillcolor = activepoint.highlightfill;
						activepoint.strokecolor = activepoint.highlightstroke;
					});

					this.showtooltip(activepointscollection);
				});
			}

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

				var datasetobject = {
					label: dataset.label || null,
					fillcolor : dataset.fillcolor,
					strokecolor : dataset.strokecolor,
					pointcolor : dataset.pointcolor,
					pointstrokecolor : dataset.pointstrokecolor,
					points : []
				};

				this.datasets.push(datasetobject);

				helpers.each(dataset.data,function(datapoint,index){
					//add a new point for each piece of data, passing any required data to draw.
					var pointposition;
					if (!this.scale.animation){
						pointposition = this.scale.getpointposition(index, this.scale.calculatecenteroffset(datapoint));
					}
					datasetobject.points.push(new this.pointclass({
						value : datapoint,
						label : data.labels[index],
						datasetlabel: dataset.label,
						x: (this.options.animation) ? this.scale.xcenter : pointposition.x,
						y: (this.options.animation) ? this.scale.ycenter : pointposition.y,
						strokecolor : dataset.pointstrokecolor,
						fillcolor : dataset.pointcolor,
						highlightfill : dataset.pointhighlightfill || dataset.pointcolor,
						highlightstroke : dataset.pointhighlightstroke || dataset.pointstrokecolor
					}));
				},this);

			},this);

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

		getpointsatevent : function(evt){
			var mouseposition = helpers.getrelativeposition(evt),
				fromcenter = helpers.getanglefrompoint({
					x: this.scale.xcenter,
					y: this.scale.ycenter
				}, mouseposition);

			var angleperindex = (math.pi * 2) /this.scale.valuescount,
				pointindex = math.round((fromcenter.angle - math.pi * 1.5) / angleperindex),
				activepointscollection = [];

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

			if (fromcenter.distance <= this.scale.drawingarea){
				helpers.each(this.datasets, function(dataset){
					activepointscollection.push(dataset.points[pointindex]);
				});
			}

			return activepointscollection;
		},

		buildscale : function(data){
			this.scale = new chart.radialscale({
				display: this.options.showscale,
				fontstyle: this.options.scalefontstyle,
				fontsize: this.options.scalefontsize,
				fontfamily: this.options.scalefontfamily,
				fontcolor: this.options.scalefontcolor,
				showlabels: this.options.scaleshowlabels,
				showlabelbackdrop: this.options.scaleshowlabelbackdrop,
				backdropcolor: this.options.scalebackdropcolor,
				backgroundcolors: this.options.scalebackgroundcolors,
				backdroppaddingy : this.options.scalebackdroppaddingy,
				backdroppaddingx: this.options.scalebackdroppaddingx,
				linewidth: (this.options.scaleshowline) ? this.options.scalelinewidth : 0,
				linecolor: this.options.scalelinecolor,
				anglelinecolor : this.options.anglelinecolor,
				anglelinewidth : (this.options.angleshowlineout) ? this.options.anglelinewidth : 0,
				// point labels at the edge of each line
				pointlabelfontcolor : this.options.pointlabelfontcolor,
				pointlabelfontsize : this.options.pointlabelfontsize,
				pointlabelfontfamily : this.options.pointlabelfontfamily,
				pointlabelfontstyle : this.options.pointlabelfontstyle,
				height : this.chart.height,
				width: this.chart.width,
				xcenter: this.chart.width/2,
				ycenter: this.chart.height/2,
				ctx : this.chart.ctx,
				templatestring: this.options.scalelabel,
				labels: data.labels,
				valuescount: data.datasets[0].data.length
			});

			this.scale.setscalesize();
			this.updatescalerange(data.datasets);
			this.scale.buildylabels();
		},
		updatescalerange: function(datasets){
			var valuesarray = (function(){
				var totaldataarray = [];
				helpers.each(datasets,function(dataset){
					if (dataset.data){
						totaldataarray = totaldataarray.concat(dataset.data);
					}
					else {
						helpers.each(dataset.points, function(point){
							totaldataarray.push(point.value);
						});
					}
				});
				return totaldataarray;
			})();


			var scalesizes = (this.options.scaleoverride) ?
				{
					steps: this.options.scalesteps,
					stepvalue: this.options.scalestepwidth,
					min: this.options.scalestartvalue,
					max: this.options.scalestartvalue + (this.options.scalesteps * this.options.scalestepwidth)
				} :
				helpers.calculatescalerange(
					valuesarray,
					helpers.min([this.chart.width, this.chart.height])/2,
					this.options.scalefontsize,
					this.options.scalebeginatzero,
					this.options.scaleintegersonly
				);

			helpers.extend(
				this.scale,
				scalesizes
			);

		},
		adddata : function(valuesarray,label){
			//map the values array for each of the datasets
			this.scale.valuescount++;
			helpers.each(valuesarray,function(value,datasetindex){
				var pointposition = this.scale.getpointposition(this.scale.valuescount, this.scale.calculatecenteroffset(value));
				this.datasets[datasetindex].points.push(new this.pointclass({
					value : value,
					label : label,
					datasetlabel: this.datasets[datasetindex].label,
					x: pointposition.x,
					y: pointposition.y,
					strokecolor : this.datasets[datasetindex].pointstrokecolor,
					fillcolor : this.datasets[datasetindex].pointcolor
				}));
			},this);

			this.scale.labels.push(label);

			this.reflow();

			this.update();
		},
		removedata : function(){
			this.scale.valuescount--;
			this.scale.labels.shift();
			helpers.each(this.datasets,function(dataset){
				dataset.points.shift();
			},this);
			this.reflow();
			this.update();
		},
		update : function(){
			this.eachpoints(function(point){
				point.save();
			});
			this.reflow();
			this.render();
		},
		reflow: function(){
			helpers.extend(this.scale, {
				width : this.chart.width,
				height: this.chart.height,
				size : helpers.min([this.chart.width, this.chart.height]),
				xcenter: this.chart.width/2,
				ycenter: this.chart.height/2
			});
			this.updatescalerange(this.datasets);
			this.scale.setscalesize();
			this.scale.buildylabels();
		},
		draw : function(ease){
			var easedecimal = ease || 1,
				ctx = this.chart.ctx;
			this.clear();
			this.scale.draw();

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

				//transition each point first so that the line and point drawing isn't out of sync
				helpers.each(dataset.points,function(point,index){
					if (point.hasvalue()){
						point.transition(this.scale.getpointposition(index, this.scale.calculatecenteroffset(point.value)), easedecimal);
					}
				},this);



				//draw the line between all the points
				ctx.linewidth = this.options.datasetstrokewidth;
				ctx.strokestyle = dataset.strokecolor;
				ctx.beginpath();
				helpers.each(dataset.points,function(point,index){
					if (index === 0){
						ctx.moveto(point.x,point.y);
					}
					else{
						ctx.lineto(point.x,point.y);
					}
				},this);
				ctx.closepath();
				ctx.stroke();

				ctx.fillstyle = dataset.fillcolor;
				if(this.options.datasetfill){
					ctx.fill();
				}
				//now draw the points over the line
				//a little inefficient double looping, but better than the line
				//lagging behind the point positions
				helpers.each(dataset.points,function(point){
					if (point.hasvalue()){
						point.draw();
					}
				});

			},this);

		}

	});





}).call(this);