TrainSignManage/WebFrame/bower_components/chart.js/src/Chart.Doughnut.js

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(function(){
	"use strict";

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

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

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

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

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

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

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

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

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

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

	};


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

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

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

			//Set up tooltip events on the chart
			if (this.options.showTooltips){