Initial Commit

static/baseTemplate/assets/widgets/charts/chart-js/chart-doughnut.js

@@ -0,0 +1,184 @@
+(function(){
+	"use strict";
+
+	var root = this,
+		Chart = root.Chart,
+		//Cache a local reference to Chart.helpers
+		helpers = Chart.helpers;
+
+	var defaultConfig = {
+		//Boolean - Whether we should show a stroke on each segment
+		segmentShowStroke : true,
+
+		//String - The colour of each segment stroke
+		segmentStrokeColor : "#fff",
+
+		//Number - The width of each segment stroke
+		segmentStrokeWidth : 2,
+
+		//The percentage of the chart that we cut out of the middle.
+		percentageInnerCutout : 50,
+
+		//Number - Amount of animation steps
+		animationSteps : 100,
+
+		//String - Animation easing effect
+		animationEasing : "easeOutBounce",
+
+		//Boolean - Whether we animate the rotation of the Doughnut
+		animateRotate : true,
+
+		//Boolean - Whether we animate scaling the Doughnut from the centre
+		animateScale : false,
+
+		//String - A legend template
+		legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<segments.length; i++){%><li><span style=\"background-color:<%=segments[i].fillColor%>\"></span><%if(segments[i].label){%><%=segments[i].label%><%}%></li><%}%></ul>"
+
+	};
+
+
+	Chart.Type.extend({
+		//Passing in a name registers this chart in the Chart namespace
+		name: "Doughnut",
+		//Providing a defaults will also register the deafults in the chart namespace
+		defaults : defaultConfig,
+		//Initialize is fired when the chart is initialized - Data is passed in as a parameter
+		//Config is automatically merged by the core of Chart.js, and is available at this.options
+		initialize:  function(data){
+
+			//Declare segments as a static property to prevent inheriting across the Chart type prototype
+			this.segments = [];
+			this.outerRadius = (helpers.min([this.chart.width,this.chart.height]) -	this.options.segmentStrokeWidth/2)/2;
+
+			this.SegmentArc = Chart.Arc.extend({
+				ctx : this.chart.ctx,
+				x : this.chart.width/2,
+				y : this.chart.height/2
+			});
+
+			//Set up tooltip events on the chart
+			if (this.options.showTooltips){
+				helpers.bindEvents(this, this.options.tooltipEvents, function(evt){
+					var activeSegments = (evt.type !== 'mouseout') ? this.getSegmentsAtEvent(evt) : [];
+
+					helpers.each(this.segments,function(segment){
+						segment.restore(["fillColor"]);
+					});
+					helpers.each(activeSegments,function(activeSegment){
+						activeSegment.fillColor = activeSegment.highlightColor;
+					});
+					this.showTooltip(activeSegments);
+				});
+			}
+			this.calculateTotal(data);
+
+			helpers.each(data,function(datapoint, index){
+				this.addData(datapoint, index, true);
+			},this);
+
+			this.render();
+		},
+		getSegmentsAtEvent : function(e){
+			var segmentsArray = [];
+
+			var location = helpers.getRelativePosition(e);
+
+			helpers.each(this.segments,function(segment){
+				if (segment.inRange(location.x,location.y)) segmentsArray.push(segment);
+			},this);
+			return segmentsArray;
+		},
+		addData : function(segment, atIndex, silent){
+			var index = atIndex || this.segments.length;
+			this.segments.splice(index, 0, new this.SegmentArc({
+				value : segment.value,
+				outerRadius : (this.options.animateScale) ? 0 : this.outerRadius,
+				innerRadius : (this.options.animateScale) ? 0 : (this.outerRadius/100) * this.options.percentageInnerCutout,
+				fillColor : segment.color,
+				highlightColor : segment.highlight || segment.color,
+				showStroke : this.options.segmentShowStroke,
+				strokeWidth : this.options.segmentStrokeWidth,
+				strokeColor : this.options.segmentStrokeColor,
+				startAngle : Math.PI * 1.5,
+				circumference : (this.options.animateRotate) ? 0 : this.calculateCircumference(segment.value),
+				label : segment.label
+			}));
+			if (!silent){
+				this.reflow();
+				this.update();
+			}
+		},
+		calculateCircumference : function(value){
+			return (Math.PI*2)*(value / this.total);
+		},
+		calculateTotal : function(data){
+			this.total = 0;
+			helpers.each(data,function(segment){
+				this.total += segment.value;
+			},this);
+		},
+		update : function(){
+			this.calculateTotal(this.segments);
+
+			// Reset any highlight colours before updating.
+			helpers.each(this.activeElements, function(activeElement){
+				activeElement.restore(['fillColor']);
+			});
+
+			helpers.each(this.segments,function(segment){
+				segment.save();
+			});
+			this.render();
+		},
+
+		removeData: function(atIndex){
+			var indexToDelete = (helpers.isNumber(atIndex)) ? atIndex : this.segments.length-1;
+			this.segments.splice(indexToDelete, 1);
+			this.reflow();
+			this.update();
+		},
+
+		reflow : function(){
+			helpers.extend(this.SegmentArc.prototype,{
+				x : this.chart.width/2,
+				y : this.chart.height/2
+			});
+			this.outerRadius = (helpers.min([this.chart.width,this.chart.height]) -	this.options.segmentStrokeWidth/2)/2;
+			helpers.each(this.segments, function(segment){
+				segment.update({
+					outerRadius : this.outerRadius,
+					innerRadius : (this.outerRadius/100) * this.options.percentageInnerCutout
+				});
+			}, this);
+		},
+		draw : function(easeDecimal){
+			var animDecimal = (easeDecimal) ? easeDecimal : 1;
+			this.clear();
+			helpers.each(this.segments,function(segment,index){
+				segment.transition({
+					circumference : this.calculateCircumference(segment.value),
+					outerRadius : this.outerRadius,
+					innerRadius : (this.outerRadius/100) * this.options.percentageInnerCutout
+				},animDecimal);
+
+				segment.endAngle = segment.startAngle + segment.circumference;
+
+				segment.draw();
+				if (index === 0){
+					segment.startAngle = Math.PI * 1.5;
+				}
+				//Check to see if it's the last segment, if not get the next and update the start angle
+				if (index < this.segments.length-1){
+					this.segments[index+1].startAngle = segment.endAngle;
+				}
+			},this);
+
+		}
+	});
+
+	Chart.types.Doughnut.extend({
+		name : "Pie",
+		defaults : helpers.merge(defaultConfig,{percentageInnerCutout : 0})
+	});
+
+}).call(this);