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