Just a quick pen to illustrate a new property we can use to rotate a doughnut chart. This example is specific to the Chart.JS library.
A Pen by Mark Drake on CodePen.
Created
June 5, 2015 17:28
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Save markadrake/4843f4e20f40a6397059 to your computer and use it in GitHub Desktop.
Rotate a Doughnut Chart (Chart.JS)
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| <!doctype html> | |
| <html> | |
| <head> | |
| <title>Doughnut Chart</title> | |
| <style> | |
| body{ | |
| padding: 0; | |
| margin: 0; | |
| } | |
| #canvas-holder{ | |
| width:30%; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="canvas-holder"> | |
| <canvas id="chart-area" width="500" height="500"/> | |
| </div> | |
| <script> | |
| var doughnutData = [ | |
| { | |
| value: 300, | |
| color:"#F7464A", | |
| highlight: "#FF5A5E", | |
| label: "Red" | |
| }, | |
| { | |
| value: 50, | |
| color: "#46BFBD", | |
| highlight: "#5AD3D1", | |
| label: "Green" | |
| }, | |
| { | |
| value: 100, | |
| color: "#FDB45C", | |
| highlight: "#FFC870", | |
| label: "Yellow" | |
| }, | |
| { | |
| value: 40, | |
| color: "#949FB1", | |
| highlight: "#A8B3C5", | |
| label: "Grey" | |
| }, | |
| { | |
| value: 120, | |
| color: "#4D5360", | |
| highlight: "#616774", | |
| label: "Dark Grey" | |
| } | |
| ]; | |
| window.onload = function(){ | |
| var ctx = document.getElementById("chart-area").getContext("2d"); | |
| window.myDoughnut = new Chart(ctx).Doughnut(doughnutData, {responsive : true, rotation: 90}); | |
| }; | |
| </script> | |
| </body> | |
| </html> |
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| /*! | |
| * 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'); | |
| var height = this.height = computeDimension(context.canvas,'Height'); | |
| // Firefox requires this to work correctly | |
| context.canvas.width = width; | |
| context.canvas.height = height; | |
| var width = this.width = context.canvas.width; | |
| var height = this.height = context.canvas.height; | |
| this.aspectRatio = this.width / this.height; | |
| //High pixel density displays - multiply the size of the canvas height/width by the device pixel ratio, then scale. | |
| helpers.retinaScale(this); | |
| return this; | |
| }; | |
| //Globally expose the defaults to allow for user updating/changing | |
| Chart.defaults = { | |
| global: { | |
| // Boolean - Whether to animate the chart | |
| animation: true, | |
| // Number - Number of animation steps | |
| animationSteps: 60, | |
| // String - Animation easing effect | |
| animationEasing: "easeOutQuart", | |
| // Boolean - If we should show the scale at all | |
| showScale: true, | |
| // Boolean - If we want to override with a hard coded scale | |
| scaleOverride: false, | |
| // ** Required if scaleOverride is true ** | |
| // Number - The number of steps in a hard coded scale | |
| scaleSteps: null, | |
| // Number - The value jump in the hard coded scale | |
| scaleStepWidth: null, | |
| // Number - The scale starting value | |
| scaleStartValue: null, | |
| // String - Colour of the scale line | |
| scaleLineColor: "rgba(0,0,0,.1)", | |
| // Number - Pixel width of the scale line | |
| scaleLineWidth: 1, | |
| // Boolean - Whether to show labels on the scale | |
| scaleShowLabels: true, | |
| // Interpolated JS string - can access value | |
| scaleLabel: "<%=value%>", | |
| // Boolean - Whether the scale should stick to integers, and not show any floats even if drawing space is there | |
| scaleIntegersOnly: true, | |
| // Boolean - Whether the scale should start at zero, or an order of magnitude down from the lowest value | |
| scaleBeginAtZero: false, | |
| // String - Scale label font declaration for the scale label | |
| scaleFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif", | |
| // Number - Scale label font size in pixels | |
| scaleFontSize: 12, | |
| // String - Scale label font weight style | |
| scaleFontStyle: "normal", | |
| // String - Scale label font colour | |
| scaleFontColor: "#666", | |
| // Boolean - whether or not the chart should be responsive and resize when the browser does. | |
| responsive: false, | |
| // Boolean - whether to maintain the starting aspect ratio or not when responsive, if set to false, will take up entire container | |
| maintainAspectRatio: true, | |
| // Boolean - Determines whether to draw tooltips on the canvas or not - attaches events to touchmove & mousemove | |
| showTooltips: true, | |
| // 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", | |
| // Number - pixel width of padding around tooltip text | |
| tooltipYPadding: 6, | |
| // Number - pixel width of padding around tooltip text | |
| tooltipXPadding: 6, | |
| // Number - Size of the caret on the tooltip | |
| tooltipCaretSize: 8, | |
| // Number - Pixel radius of the tooltip border | |
| tooltipCornerRadius: 6, | |
| // Number - Pixel offset from point x to tooltip edge | |
| tooltipXOffset: 10, | |
| // String - Template string for single tooltips | |
| tooltipTemplate: "<%if (label){%><%=label%>: <%}%><%= value %>", | |
| // String - Template string for single tooltips | |
| multiTooltipTemplate: "<%= value %>", | |
| // String - Colour behind the legend colour block | |
| multiTooltipKeyBackground: '#fff', | |
| // Function - Will fire on animation progression. | |
| onAnimationProgress: function(){}, | |
| // Function - Will fire on animation completion. | |
| onAnimationComplete: function(){} | |
| } | |
| }; | |
| //Create a dictionary of chart types, to allow for extension of existing types | |
| Chart.types = {}; | |
| //Global Chart helpers object for utility methods and classes | |
| var helpers = Chart.helpers = {}; | |
| //-- Basic js utility methods | |
| var each = helpers.each = function(loopable,callback,self){ | |
| var additionalArgs = Array.prototype.slice.call(arguments, 3); | |
| // Check to see if null or undefined firstly. | |
| if (loopable){ | |
| if (loopable.length === +loopable.length){ | |
| var i; | |
| for (i=0; i<loopable.length; i++){ | |
| callback.apply(self,[loopable[i], i].concat(additionalArgs)); | |
| } | |
| } | |
| else{ | |
| for (var item in loopable){ | |
| callback.apply(self,[loopable[item],item].concat(additionalArgs)); | |
| } | |
| } | |
| } | |
| }, | |
| clone = helpers.clone = function(obj){ | |
| var objClone = {}; | |
| each(obj,function(value,key){ | |
| if (obj.hasOwnProperty(key)) objClone[key] = value; | |
| }); | |
| return objClone; | |
| }, | |
| extend = helpers.extend = function(base){ | |
| each(Array.prototype.slice.call(arguments,1), function(extensionObject) { | |
| each(extensionObject,function(value,key){ | |
| if (extensionObject.hasOwnProperty(key)) base[key] = value; | |
| }); | |
| }); | |
| return base; | |
| }, | |
| merge = helpers.merge = function(base,master){ | |
| //Merge properties in left object over to a shallow clone of object right. | |
| var args = Array.prototype.slice.call(arguments,0); | |
| args.unshift({}); | |
| return extend.apply(null, args); | |
| }, | |
| indexOf = helpers.indexOf = function(arrayToSearch, item){ | |
| if (Array.prototype.indexOf) { | |
| return arrayToSearch.indexOf(item); | |
| } | |
| else{ | |
| for (var i = 0; i < arrayToSearch.length; i++) { | |
| if (arrayToSearch[i] === item) return i; | |
| } | |
| return -1; | |
| } | |
| }, | |
| where = helpers.where = function(collection, filterCallback){ | |
| var filtered = []; | |
| helpers.each(collection, function(item){ | |
| if (filterCallback(item)){ | |
| filtered.push(item); | |
| } | |
| }); | |
| return filtered; | |
| }, | |
| findNextWhere = helpers.findNextWhere = function(arrayToSearch, filterCallback, startIndex){ | |
| // Default to start of the array | |
| if (!startIndex){ | |
| startIndex = -1; | |
| } | |
| for (var i = startIndex + 1; i < arrayToSearch.length; i++) { | |
| var currentItem = arrayToSearch[i]; | |
| if (filterCallback(currentItem)){ | |
| return currentItem; | |
| } | |
| } | |
| }, | |
| findPreviousWhere = helpers.findPreviousWhere = function(arrayToSearch, filterCallback, startIndex){ | |
| // Default to end of the array | |
| if (!startIndex){ | |
| startIndex = arrayToSearch.length; | |
| } | |
| for (var i = startIndex - 1; i >= 0; i--) { | |
| var currentItem = arrayToSearch[i]; | |
| if (filterCallback(currentItem)){ | |
| return currentItem; | |
| } | |
| } | |
| }, | |
| inherits = helpers.inherits = function(extensions){ | |
| //Basic javascript inheritance based on the model created in Backbone.js | |
| var parent = this; | |
| var ChartElement = (extensions && extensions.hasOwnProperty("constructor")) ? extensions.constructor : function(){ return parent.apply(this, arguments); }; | |
| var Surrogate = function(){ this.constructor = ChartElement;}; | |
| Surrogate.prototype = parent.prototype; | |
| ChartElement.prototype = new Surrogate(); | |
| ChartElement.extend = inherits; | |
| if (extensions) extend(ChartElement.prototype, extensions); | |
| ChartElement.__super__ = parent.prototype; | |
| return ChartElement; | |
| }, | |
| noop = helpers.noop = function(){}, | |
| uid = helpers.uid = (function(){ | |
| var id=0; | |
| return function(){ | |
| return "chart-" + id++; | |
| }; | |
| })(), | |
| warn = helpers.warn = function(str){ | |
| //Method for warning of errors | |
| if (window.console && typeof window.console.warn == "function") console.warn(str); | |
| }, | |
| amd = helpers.amd = (typeof 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)){ | |
| return num.toString().split(".")[1].length; | |
| } | |
| else { | |
| return 0; | |
| } | |
| }, | |
| toRadians = helpers.radians = function(degrees){ | |
| return degrees * (Math.PI/180); | |
| }, | |
| // Gets the angle from vertical upright to the point about a centre. | |
| getAngleFromPoint = helpers.getAngleFromPoint = function(centrePoint, anglePoint){ | |
| var distanceFromXCenter = anglePoint.x - centrePoint.x, | |
| distanceFromYCenter = anglePoint.y - centrePoint.y, | |
| radialDistanceFromCenter = Math.sqrt( distanceFromXCenter * distanceFromXCenter + distanceFromYCenter * distanceFromYCenter); | |
| var angle = Math.PI * 2 + Math.atan2(distanceFromYCenter, distanceFromXCenter); | |
| //If the segment is in the top left quadrant, we need to add another rotation to the angle | |
| if (distanceFromXCenter < 0 && distanceFromYCenter < 0){ | |
| angle += Math.PI*2; | |
| } | |
| return { | |
| angle: angle, | |
| distance: radialDistanceFromCenter | |
| }; | |
| }, | |
| aliasPixel = helpers.aliasPixel = function(pixelWidth){ | |
| return (pixelWidth % 2 === 0) ? 0 : 0.5; | |
| }, | |
| splineCurve = helpers.splineCurve = function(FirstPoint,MiddlePoint,AfterPoint,t){ | |
| //Props to Rob Spencer at scaled innovation for his post on splining between points | |
| //http://scaledinnovation.com/analytics/splines/aboutSplines.html | |
| var d01=Math.sqrt(Math.pow(MiddlePoint.x-FirstPoint.x,2)+Math.pow(MiddlePoint.y-FirstPoint.y,2)), | |
| d12=Math.sqrt(Math.pow(AfterPoint.x-MiddlePoint.x,2)+Math.pow(AfterPoint.y-MiddlePoint.y,2)), | |
| fa=t*d01/(d01+d12),// scaling factor for triangle Ta | |
| fb=t*d12/(d01+d12); | |
| return { | |
| inner : { | |
| x : MiddlePoint.x-fa*(AfterPoint.x-FirstPoint.x), | |
| y : MiddlePoint.y-fa*(AfterPoint.y-FirstPoint.y) | |
| }, | |
| outer : { | |
| x: MiddlePoint.x+fb*(AfterPoint.x-FirstPoint.x), | |
| y : MiddlePoint.y+fb*(AfterPoint.y-FirstPoint.y) | |
| } | |
| }; | |
| }, | |
| calculateOrderOfMagnitude = helpers.calculateOrderOfMagnitude = function(val){ | |
| return Math.floor(Math.log(val) / Math.LN10); | |
| }, | |
| calculateScaleRange = helpers.calculateScaleRange = function(valuesArray, drawingSize, textSize, startFromZero, integersOnly){ | |
| //Set a minimum step of two - a point at the top of the graph, and a point at the base | |
| var minSteps = 2, | |
| maxSteps = Math.floor(drawingSize/(textSize * 1.5)), | |
| skipFitting = (minSteps >= maxSteps); | |
| var maxValue = max(valuesArray), | |
| minValue = min(valuesArray); | |
| // We need some degree of seperation here to calculate the scales if all the values are the same | |
| // Adding/minusing 0.5 will give us a range of 1. | |
| if (maxValue === minValue){ | |
| maxValue += 0.5; | |
| // So we don't end up with a graph with a negative start value if we've said always start from zero | |
| if (minValue >= 0.5 && !startFromZero){ | |
| minValue -= 0.5; | |
| } | |
| else{ | |
| // Make up a whole number above the values | |
| maxValue += 0.5; | |
| } | |
| } | |
| var valueRange = Math.abs(maxValue - minValue), | |
| rangeOrderOfMagnitude = calculateOrderOfMagnitude(valueRange), | |
| graphMax = Math.ceil(maxValue / (1 * Math.pow(10, rangeOrderOfMagnitude))) * Math.pow(10, rangeOrderOfMagnitude), | |
| graphMin = (startFromZero) ? 0 : Math.floor(minValue / (1 * Math.pow(10, rangeOrderOfMagnitude))) * Math.pow(10, rangeOrderOfMagnitude), | |
| graphRange = graphMax - graphMin, | |
| stepValue = Math.pow(10, rangeOrderOfMagnitude), | |
| numberOfSteps = Math.round(graphRange / stepValue); | |
| //If we have more space on the graph we'll use it to give more definition to the data | |
| while((numberOfSteps > maxSteps || (numberOfSteps * 2) < maxSteps) && !skipFitting) { | |
| if(numberOfSteps > maxSteps){ | |
| stepValue *=2; | |
| numberOfSteps = Math.round(graphRange/stepValue); | |
| // Don't ever deal with a decimal number of steps - cancel fitting and just use the minimum number of steps. | |
| if (numberOfSteps % 1 !== 0){ | |
| skipFitting = true; | |
| } | |
| } | |
| //We can fit in double the amount of scale points on the scale | |
| else{ | |
| //If user has declared ints only, and the step value isn't a decimal | |
| if (integersOnly && rangeOrderOfMagnitude >= 0){ | |
| //If the user has said integers only, we need to check that making the scale more granular wouldn't make it a float | |
| if(stepValue/2 % 1 === 0){ | |
| stepValue /=2; | |
| numberOfSteps = Math.round(graphRange/stepValue); | |
| } | |
| //If it would make it a float break out of the loop | |
| else{ | |
| break; | |
| } | |
| } | |
| //If the scale doesn't have to be an int, make the scale more granular anyway. | |
| else{ | |
| stepValue /=2; | |
| numberOfSteps = Math.round(graphRange/stepValue); | |
| } | |
| } | |
| } | |
| if (skipFitting){ | |
| numberOfSteps = minSteps; | |
| stepValue = graphRange / numberOfSteps; | |
| } | |
| return { | |
| steps : numberOfSteps, | |
| stepValue : stepValue, | |
| min : graphMin, | |
| max : graphMin + (numberOfSteps * stepValue) | |
| }; | |
| }, | |
| /* jshint ignore:start */ | |
| // Blows up jshint errors based on the new Function constructor | |
| //Templating methods | |
| //Javascript micro templating by John Resig - source at http://ejohn.org/blog/javascript-micro-templating/ | |
| template = helpers.template = function(templateString, valuesObject){ | |
| // If templateString is function rather than string-template - call the function for valuesObject | |
| if(templateString instanceof Function){ | |
| return templateString(valuesObject); | |
| } | |
| var cache = {}; | |
| function tmpl(str, data){ | |
| // Figure out if we're getting a template, or if we need to | |
| // load the template - and be sure to cache the result. | |
| var fn = !/\W/.test(str) ? | |
| cache[str] = cache[str] : | |
| // Generate a reusable function that will serve as a template | |
| // generator (and which will be cached). | |
| new Function("obj", | |
| "var p=[],print=function(){p.push.apply(p,arguments);};" + | |
| // Introduce the data as local variables using with(){} | |
| "with(obj){p.push('" + | |
| // Convert the template into pure JavaScript | |
| str | |
| .replace(/[\r\t\n]/g, " ") | |
| .split("<%").join("\t") | |
| .replace(/((^|%>)[^\t]*)'/g, "$1\r") | |
| .replace(/\t=(.*?)%>/g, "',$1,'") | |
| .split("\t").join("');") | |
| .split("%>").join("p.push('") | |
| .split("\r").join("\\'") + | |
| "');}return p.join('');" | |
| ); | |
| // Provide some basic currying to the user | |
| return data ? fn( data ) : fn; | |
| } | |
| return tmpl(templateString,valuesObject); | |
| }, | |
| /* jshint ignore:end */ | |
| generateLabels = helpers.generateLabels = function(templateString,numberOfSteps,graphMin,stepValue){ | |
| var labelsArray = new Array(numberOfSteps); | |
| if (labelTemplateString){ | |
| each(labelsArray,function(val,index){ | |
| labelsArray[index] = template(templateString,{value: (graphMin + (stepValue*(index+1)))}); | |
| }); | |
| } | |
| return labelsArray; | |
| }, | |
| //--Animation methods | |
| //Easing functions adapted from Robert Penner's easing equations | |
| //http://www.robertpenner.com/easing/ | |
| easingEffects = helpers.easingEffects = { | |
| linear: function (t) { | |
| return t; | |
| }, | |
| easeInQuad: function (t) { | |
| return t * t; | |
| }, | |
| easeOutQuad: function (t) { | |
| return -1 * t * (t - 2); | |
| }, | |
| easeInOutQuad: function (t) { | |
| if ((t /= 1 / 2) < 1) return 1 / 2 * t * t; | |
| return -1 / 2 * ((--t) * (t - 2) - 1); | |
| }, | |
| easeInCubic: function (t) { | |
| return t * t * t; | |
| }, | |
| easeOutCubic: function (t) { | |
| return 1 * ((t = t / 1 - 1) * t * t + 1); | |
| }, | |
| easeInOutCubic: function (t) { | |
| if ((t /= 1 / 2) < 1) return 1 / 2 * t * t * t; | |
| return 1 / 2 * ((t -= 2) * t * t + 2); | |
| }, | |
| easeInQuart: function (t) { | |
| return t * t * t * t; | |
| }, | |
| easeOutQuart: function (t) { | |
| return -1 * ((t = t / 1 - 1) * t * t * t - 1); | |
| }, | |
| easeInOutQuart: function (t) { | |
| if ((t /= 1 / 2) < 1) return 1 / 2 * t * t * t * t; | |
| return -1 / 2 * ((t -= 2) * t * t * t - 2); | |
| }, | |
| easeInQuint: function (t) { | |
| return 1 * (t /= 1) * t * t * t * t; | |
| }, | |
| easeOutQuint: function (t) { | |
| return 1 * ((t = t / 1 - 1) * t * t * t * t + 1); | |
| }, | |
| easeInOutQuint: function (t) { | |
| if ((t /= 1 / 2) < 1) return 1 / 2 * t * t * t * t * t; | |
| return 1 / 2 * ((t -= 2) * t * t * t * t + 2); | |
| }, | |
| easeInSine: function (t) { | |
| return -1 * Math.cos(t / 1 * (Math.PI / 2)) + 1; | |
| }, | |
| easeOutSine: function (t) { | |
| return 1 * Math.sin(t / 1 * (Math.PI / 2)); | |
| }, | |
| easeInOutSine: function (t) { | |
| return -1 / 2 * (Math.cos(Math.PI * t / 1) - 1); | |
| }, | |
| easeInExpo: function (t) { | |
| return (t === 0) ? 1 : 1 * Math.pow(2, 10 * (t / 1 - 1)); | |
| }, | |
| easeOutExpo: function (t) { | |
| return (t === 1) ? 1 : 1 * (-Math.pow(2, -10 * t / 1) + 1); | |
| }, | |
| easeInOutExpo: function (t) { | |
| if (t === 0) return 0; | |
| if (t === 1) return 1; | |
| if ((t /= 1 / 2) < 1) return 1 / 2 * Math.pow(2, 10 * (t - 1)); | |
| return 1 / 2 * (-Math.pow(2, -10 * --t) + 2); | |
| }, | |
| easeInCirc: function (t) { | |
| if (t >= 1) return t; | |
| return -1 * (Math.sqrt(1 - (t /= 1) * t) - 1); | |
| }, | |
| easeOutCirc: function (t) { | |
| return 1 * Math.sqrt(1 - (t = t / 1 - 1) * t); | |
| }, | |
| easeInOutCirc: function (t) { | |
| if ((t /= 1 / 2) < 1) return -1 / 2 * (Math.sqrt(1 - t * t) - 1); | |
| return 1 / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1); | |
| }, | |
| easeInElastic: function (t) { | |
| var s = 1.70158; | |
| var p = 0; | |
| var a = 1; | |
| if (t === 0) return 0; | |
| if ((t /= 1) == 1) return 1; | |
| if (!p) p = 1 * 0.3; | |
| if (a < Math.abs(1)) { | |
| a = 1; | |
| s = p / 4; | |
| } else s = p / (2 * Math.PI) * Math.asin(1 / a); | |
| return -(a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p)); | |
| }, | |
| easeOutElastic: function (t) { | |
| var s = 1.70158; | |
| var p = 0; | |
| var a = 1; | |
| if (t === 0) return 0; | |
| if ((t /= 1) == 1) return 1; | |
| if (!p) p = 1 * 0.3; | |
| if (a < Math.abs(1)) { | |
| a = 1; | |
| s = p / 4; | |
| } else s = p / (2 * Math.PI) * Math.asin(1 / a); | |
| return a * Math.pow(2, -10 * t) * Math.sin((t * 1 - s) * (2 * Math.PI) / p) + 1; | |
| }, | |
| easeInOutElastic: function (t) { | |
| var s = 1.70158; | |
| var p = 0; | |
| var a = 1; | |
| if (t === 0) return 0; | |
| if ((t /= 1 / 2) == 2) return 1; | |
| if (!p) p = 1 * (0.3 * 1.5); | |
| if (a < Math.abs(1)) { | |
| a = 1; | |
| s = p / 4; | |
| } else s = p / (2 * Math.PI) * Math.asin(1 / a); | |
| if (t < 1) return -0.5 * (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p)); | |
| return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p) * 0.5 + 1; | |
| }, | |
| easeInBack: function (t) { | |
| var s = 1.70158; | |
| return 1 * (t /= 1) * t * ((s + 1) * t - s); | |
| }, | |
| easeOutBack: function (t) { | |
| var s = 1.70158; | |
| return 1 * ((t = t / 1 - 1) * t * ((s + 1) * t + s) + 1); | |
| }, | |
| easeInOutBack: function (t) { | |
| var s = 1.70158; | |
| if ((t /= 1 / 2) < 1) return 1 / 2 * (t * t * (((s *= (1.525)) + 1) * t - s)); | |
| return 1 / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2); | |
| }, | |
| easeInBounce: function (t) { | |
| return 1 - easingEffects.easeOutBounce(1 - t); | |
| }, | |
| easeOutBounce: function (t) { | |
| if ((t /= 1) < (1 / 2.75)) { | |
| return 1 * (7.5625 * t * t); | |
| } else if (t < (2 / 2.75)) { | |
| return 1 * (7.5625 * (t -= (1.5 / 2.75)) * t + 0.75); | |
| } else if (t < (2.5 / 2.75)) { | |
| return 1 * (7.5625 * (t -= (2.25 / 2.75)) * t + 0.9375); | |
| } else { | |
| return 1 * (7.5625 * (t -= (2.625 / 2.75)) * t + 0.984375); | |
| } | |
| }, | |
| easeInOutBounce: function (t) { | |
| if (t < 1 / 2) return easingEffects.easeInBounce(t * 2) * 0.5; | |
| return easingEffects.easeOutBounce(t * 2 - 1) * 0.5 + 1 * 0.5; | |
| } | |
| }, | |
| //Request animation polyfill - http://www.paulirish.com/2011/requestanimationframe-for-smart-animating/ | |
| requestAnimFrame = helpers.requestAnimFrame = (function(){ | |
| return window.requestAnimationFrame || | |
| window.webkitRequestAnimationFrame || | |
| window.mozRequestAnimationFrame || | |
| window.oRequestAnimationFrame || | |
| window.msRequestAnimationFrame || | |
| function(callback) { | |
| return window.setTimeout(callback, 1000 / 60); | |
| }; | |
| })(), | |
| cancelAnimFrame = helpers.cancelAnimFrame = (function(){ | |
| return window.cancelAnimationFrame || | |
| window.webkitCancelAnimationFrame || | |
| window.mozCancelAnimationFrame || | |
| window.oCancelAnimationFrame || | |
| window.msCancelAnimationFrame || | |
| function(callback) { | |
| return window.clearTimeout(callback, 1000 / 60); | |
| }; | |
| })(), | |
| animationLoop = helpers.animationLoop = function(callback,totalSteps,easingString,onProgress,onComplete,chartInstance){ | |
| var currentStep = 0, | |
| easingFunction = easingEffects[easingString] || easingEffects.linear; | |
| var animationFrame = function(){ | |
| currentStep++; | |
| var stepDecimal = currentStep/totalSteps; | |
| var easeDecimal = easingFunction(stepDecimal); | |
| callback.call(chartInstance,easeDecimal,stepDecimal, currentStep); | |
| onProgress.call(chartInstance,easeDecimal,stepDecimal); | |
| if (currentStep < totalSteps){ | |
| chartInstance.animationFrame = requestAnimFrame(animationFrame); | |
| } else{ | |
| onComplete.apply(chartInstance); | |
| } | |
| }; | |
| requestAnimFrame(animationFrame); | |
| }, | |
| //-- DOM methods | |
| getRelativePosition = helpers.getRelativePosition = function(evt){ | |
| var mouseX, mouseY; | |
| var e = evt.originalEvent || evt, | |
| canvas = evt.currentTarget || evt.srcElement, | |
| boundingRect = canvas.getBoundingClientRect(); | |
| if (e.touches){ | |
| mouseX = e.touches[0].clientX - boundingRect.left; | |
| mouseY = e.touches[0].clientY - boundingRect.top; | |
| } | |
| else{ | |
| mouseX = e.clientX - boundingRect.left; | |
| mouseY = e.clientY - boundingRect.top; | |
| } | |
| return { | |
| x : mouseX, | |
| y : mouseY | |
| }; | |
| }, | |
| addEvent = helpers.addEvent = function(node,eventType,method){ | |
| if (node.addEventListener){ | |
| node.addEventListener(eventType,method); | |
| } else if (node.attachEvent){ | |
| node.attachEvent("on"+eventType, method); | |
| } else { | |
| node["on"+eventType] = method; | |
| } | |
| }, | |
| removeEvent = helpers.removeEvent = function(node, eventType, handler){ | |
| if (node.removeEventListener){ | |
| node.removeEventListener(eventType, handler, false); | |
| } else if (node.detachEvent){ | |
| node.detachEvent("on"+eventType,handler); | |
| } else{ | |
| node["on" + eventType] = noop; | |
| } | |
| }, | |
| bindEvents = helpers.bindEvents = function(chartInstance, arrayOfEvents, handler){ | |
| // Create the events object if it's not already present | |
| if (!chartInstance.events) chartInstance.events = {}; | |
| each(arrayOfEvents,function(eventName){ | |
| chartInstance.events[eventName] = function(){ | |
| handler.apply(chartInstance, arguments); | |
| }; | |
| addEvent(chartInstance.chart.canvas,eventName,chartInstance.events[eventName]); | |
| }); | |
| }, | |
| unbindEvents = helpers.unbindEvents = function (chartInstance, arrayOfEvents) { | |
| each(arrayOfEvents, function(handler,eventName){ | |
| removeEvent(chartInstance.chart.canvas, eventName, handler); | |
| }); | |
| }, | |
| getMaximumWidth = helpers.getMaximumWidth = function(domNode){ | |
| var container = domNode.parentNode; | |
| // TODO = check cross browser stuff with this. | |
| return container.clientWidth; | |
| }, | |
| getMaximumHeight = helpers.getMaximumHeight = function(domNode){ | |
| var container = domNode.parentNode; | |
| // TODO = check cross browser stuff with this. | |
| return container.clientHeight; | |
| }, | |
| getMaximumSize = helpers.getMaximumSize = helpers.getMaximumWidth, // legacy support | |
| retinaScale = helpers.retinaScale = function(chart){ | |
| var ctx = chart.ctx, | |
| width = chart.canvas.width, | |
| height = chart.canvas.height; | |
| if (window.devicePixelRatio) { | |
| ctx.canvas.style.width = width + "px"; | |
| ctx.canvas.style.height = height + "px"; | |
| ctx.canvas.height = height * window.devicePixelRatio; | |
| ctx.canvas.width = width * window.devicePixelRatio; | |
| ctx.scale(window.devicePixelRatio, window.devicePixelRatio); | |
| } | |
| }, | |
| //-- Canvas methods | |
| clear = helpers.clear = function(chart){ | |
| chart.ctx.clearRect(0,0,chart.width,chart.height); | |
| }, | |
| fontString = helpers.fontString = function(pixelSize,fontStyle,fontFamily){ | |
| return fontStyle + " " + pixelSize+"px " + fontFamily; | |
| }, | |
| longestText = helpers.longestText = function(ctx,font,arrayOfStrings){ | |
| ctx.font = font; | |
| var longest = 0; | |
| each(arrayOfStrings,function(string){ | |
| var textWidth = ctx.measureText(string).width; | |
| longest = (textWidth > longest) ? textWidth : longest; | |
| }); | |
| return longest; | |
| }, | |
| drawRoundedRectangle = helpers.drawRoundedRectangle = function(ctx,x,y,width,height,radius){ | |
| ctx.beginPath(); | |
| ctx.moveTo(x + radius, y); | |
| ctx.lineTo(x + width - radius, y); | |
| ctx.quadraticCurveTo(x + width, y, x + width, y + radius); | |
| ctx.lineTo(x + width, y + height - radius); | |
| ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height); | |
| ctx.lineTo(x + radius, y + height); | |
| ctx.quadraticCurveTo(x, y + height, x, y + height - radius); | |
| ctx.lineTo(x, y + radius); | |
| ctx.quadraticCurveTo(x, y, x + radius, y); | |
| ctx.closePath(); | |
| }; | |
| //Store a reference to each instance - allowing us to globally resize chart instances on window resize. | |
| //Destroy method on the chart will remove the instance of the chart from this reference. | |
| Chart.instances = {}; | |
| Chart.Type = function(data,options,chart){ | |
| this.options = options; | |
| this.chart = chart; | |
| this.id = uid(); | |
| //Add the chart instance to the global namespace | |
| Chart.instances[this.id] = this; | |
| // Initialize is always called when a chart type is created | |
| // By default it is a no op, but it should be extended | |
| if (options.responsive){ | |
| this.resize(); | |
| } | |
| this.initialize.call(this,data); | |
| }; | |
| //Core methods that'll be a part of every chart type | |
| extend(Chart.Type.prototype,{ | |
| initialize : function(){return this;}, | |
| clear : function(){ | |
| clear(this.chart); | |
| return this; | |
| }, | |
| stop : function(){ | |
| // Stops any current animation loop occuring | |
| cancelAnimFrame(this.animationFrame); | |
| return this; | |
| }, | |
| resize : function(callback){ | |
| this.stop(); | |
| var canvas = this.chart.canvas, | |
| newWidth = getMaximumWidth(this.chart.canvas), | |
| newHeight = this.options.maintainAspectRatio ? newWidth / this.chart.aspectRatio : getMaximumHeight(this.chart.canvas); | |
| canvas.width = this.chart.width = newWidth; | |
| canvas.height = this.chart.height = newHeight; | |
| retinaScale(this.chart); | |
| if (typeof callback === "function"){ | |
| callback.apply(this, Array.prototype.slice.call(arguments, 1)); | |
| } | |
| return this; | |
| }, | |
| reflow : noop, | |
| render : function(reflow){ | |
| if (reflow){ | |
| this.reflow(); | |
| } | |
| if (this.options.animation && !reflow){ | |
| helpers.animationLoop( | |
| this.draw, | |
| this.options.animationSteps, | |
| this.options.animationEasing, | |
| this.options.onAnimationProgress, | |
| this.options.onAnimationComplete, | |
| this | |
| ); | |
| } | |
| else{ | |
| this.draw(); | |
| this.options.onAnimationComplete.call(this); | |
| } | |
| return this; | |
| }, | |
| generateLegend : function(){ | |
| return template(this.options.legendTemplate,this); | |
| }, | |
| destroy : function(){ | |
| this.clear(); | |
| unbindEvents(this, this.events); | |
| 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: ChartElements[0].label, | |
| 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 | |
| }); | |
| //Check if within the range of the open/close angle | |
| var betweenAngles = (pointRelativePosition.angle >= this.startAngle && pointRelativePosition.angle <= this.endAngle), | |
| withinRadius = (pointRelativePosition.distance >= this.innerRadius && pointRelativePosition.distance <= this.outerRadius); | |
| return (betweenAngles && withinRadius); | |
| //Ensure within the outside of the arc centre, but inside arc outer | |
| }, | |
| tooltipPosition : function(){ | |
| var centreAngle = this.startAngle + ((this.endAngle - this.startAngle) / 2), | |
| rangeFromCentre = (this.outerRadius - this.innerRadius) / 2 + this.innerRadius; | |
| return { | |
| x : this.x + (Math.cos(centreAngle) * rangeFromCentre), | |
| y : this.y + (Math.sin(centreAngle) * rangeFromCentre) | |
| }; | |
| }, | |
| draw : function(animationPercent){ | |
| var easingDecimal = animationPercent || 1; | |
| var ctx = this.ctx; | |
| ctx.beginPath(); | |
| ctx.arc(this.x, this.y, this.outerRadius, this.startAngle, this.endAngle); | |
| ctx.arc(this.x, this.y, this.innerRadius, this.endAngle, this.startAngle, true); | |
| ctx.closePath(); | |
| ctx.strokeStyle = this.strokeColor; | |
| ctx.lineWidth = this.strokeWidth; | |
| ctx.fillStyle = this.fillColor; | |
| ctx.fill(); | |
| ctx.lineJoin = 'bevel'; | |
| if (this.showStroke){ | |
| ctx.stroke(); | |
| } | |
| } | |
| }); | |
| Chart.Rectangle = Chart.Element.extend({ | |
| draw : function(){ | |
| var ctx = this.ctx, | |
| halfWidth = this.width/2, | |
| leftX = this.x - halfWidth, | |
| rightX = this.x + halfWidth, | |
| top = this.base - (this.base - this.y), | |
| halfStroke = this.strokeWidth / 2; | |
| // Canvas doesn't allow us to stroke inside the width so we can | |
| // adjust the sizes to fit if we're setting a stroke on the line | |
| if (this.showStroke){ | |
| leftX += halfStroke; | |
| rightX -= halfStroke; | |
| top += halfStroke; | |
| } | |
| ctx.beginPath(); | |
| ctx.fillStyle = this.fillColor; | |
| ctx.strokeStyle = this.strokeColor; | |
| ctx.lineWidth = this.strokeWidth; | |
| // It'd be nice to keep this class totally generic to any rectangle | |
| // and simply specify which border to miss out. | |
| ctx.moveTo(leftX, this.base); | |
| ctx.lineTo(leftX, top); | |
| ctx.lineTo(rightX, top); | |
| ctx.lineTo(rightX, this.base); | |
| ctx.fill(); | |
| if (this.showStroke){ | |
| ctx.stroke(); | |
| } | |
| }, | |
| height : function(){ | |
| return this.base - this.y; | |
| }, | |
| inRange : function(chartX,chartY){ | |
| return (chartX >= this.x - this.width/2 && chartX <= this.x + this.width/2) && (chartY >= this.y && chartY <= this.base); | |
| } | |
| }); | |
| Chart.Tooltip = Chart.Element.extend({ | |
| draw : function(){ | |
| var ctx = this.chart.ctx; | |
| ctx.font = fontString(this.fontSize,this.fontStyle,this.fontFamily); | |
| this.xAlign = "center"; | |
| this.yAlign = "above"; | |
| //Distance between the actual element.y position and the start of the tooltip caret | |
| var caretPadding = 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.height = (this.labels.length * this.fontSize) + ((this.labels.length-1) * (this.fontSize/2)) + (this.yPadding*2) + this.titleFontSize *1.5; | |
| this.ctx.font = this.titleFont; | |
| var titleWidth = this.ctx.measureText(this.title).width, | |
| //Label has a legend square as well so account for this. | |
| labelWidth = longestText(this.ctx,this.font,this.labels) + this.fontSize + 3, | |
| longestTextWidth = max([labelWidth,titleWidth]); | |
| this.width = longestTextWidth + (this.xPadding*2); | |
| var halfHeight = this.height/2; | |
| //Check to ensure the height will fit on the canvas | |
| if (this.y - halfHeight < 0 ){ | |
| this.y = halfHeight; | |
| } else if (this.y + halfHeight > this.chart.height){ | |
| this.y = this.chart.height - halfHeight; | |
| } | |
| //Decide whether to align left or right based on position on canvas | |
| if (this.x > this.chart.width/2){ | |
| this.x -= this.xOffset + this.width; | |
| } else { | |
| this.x += this.xOffset; | |
| } | |
| }, | |
| getLineHeight : function(index){ | |
| var baseLineHeight = this.y - (this.height/2) + this.yPadding, | |
| afterTitleIndex = index-1; | |
| //If the index is zero, we're getting the title | |
| if (index === 0){ | |
| return baseLineHeight + this.titleFontSize/2; | |
| } else{ | |
| return baseLineHeight + ((this.fontSize*1.5*afterTitleIndex) + this.fontSize/2) + this.titleFontSize * 1.5; | |
| } | |
| }, | |
| draw : function(){ | |
| // 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) : 0; | |
| }, | |
| addXLabel : function(label){ | |
| this.xLabels.push(label); | |
| this.valuesCount++; | |
| this.fit(); | |
| }, | |
| removeXLabel : function(){ | |
| this.xLabels.shift(); | |
| this.valuesCount--; | |
| this.fit(); | |
| }, | |
| // Fitting loop to rotate x Labels and figure out what fits there, and also calculate how many Y steps to use | |
| fit: function(){ | |
| // First we need the width of the yLabels, assuming the xLabels aren't rotated | |
| // To do that we need the base line at the top and base of the chart, assuming there is no x label rotation | |
| this.startPoint = (this.display) ? this.fontSize : 0; | |
| this.endPoint = (this.display) ? this.height - (this.fontSize * 1.5) - 5 : this.height; // -5 to pad labels | |
| // Apply padding settings to the start and end point. | |
| this.startPoint += this.padding; | |
| this.endPoint -= this.padding; | |
| // Cache the starting height, so can determine if we need to recalculate the scale yAxis | |
| var cachedHeight = this.endPoint - this.startPoint, | |
| cachedYLabelWidth; | |
| // Build the current yLabels so we have an idea of what size they'll be to start | |
| /* | |
| * This sets what is returned from calculateScaleRange as static properties of this class: | |
| * | |
| this.steps; | |
| this.stepValue; | |
| this.min; | |
| this.max; | |
| * | |
| */ | |
| this.calculateYRange(cachedHeight); | |
| // With these properties set we can now build the array of yLabels | |
| // and also the width of the largest yLabel | |
| this.buildYLabels(); | |
| this.calculateXLabelRotation(); | |
| while((cachedHeight > this.endPoint - this.startPoint)){ | |
| cachedHeight = this.endPoint - this.startPoint; | |
| cachedYLabelWidth = this.yLabelWidth; | |
| this.calculateYRange(cachedHeight); | |
| this.buildYLabels(); | |
| // Only go through the xLabel loop again if the yLabel width has changed | |
| if (cachedYLabelWidth < this.yLabelWidth){ | |
| this.calculateXLabelRotation(); | |
| } | |
| } | |
| }, | |
| calculateXLabelRotation : function(){ | |
| //Get the width of each grid by calculating the difference | |
| //between x offsets between 0 and 1. | |
| this.ctx.font = this.font; | |
| var firstWidth = this.ctx.measureText(this.xLabels[0]).width, | |
| lastWidth = this.ctx.measureText(this.xLabels[this.xLabels.length - 1]).width, | |
| firstRotated, | |
| lastRotated; | |
| this.xScalePaddingRight = lastWidth/2 + 3; | |
| this.xScalePaddingLeft = (firstWidth/2 > this.yLabelWidth + 10) ? firstWidth/2 : this.yLabelWidth + 10; | |
| this.xLabelRotation = 0; | |
| if (this.display){ | |
| var originalLabelWidth = longestText(this.ctx,this.font,this.xLabels), | |
| cosRotation, | |
| firstRotatedWidth; | |
| this.xLabelWidth = originalLabelWidth; | |
| //Allow 3 pixels x2 padding either side for label readability | |
| var xGridWidth = Math.floor(this.calculateX(1) - this.calculateX(0)) - 6; | |
| //Max label rotate should be 90 - also act as a loop counter | |
| while ((this.xLabelWidth > xGridWidth && this.xLabelRotation === 0) || (this.xLabelWidth > xGridWidth && this.xLabelRotation <= 90 && this.xLabelRotation > 0)){ | |
| cosRotation = Math.cos(toRadians(this.xLabelRotation)); | |
| firstRotated = cosRotation * firstWidth; | |
| lastRotated = cosRotation * lastWidth; | |
| // We're right aligning the text now. | |
| if (firstRotated + this.fontSize / 2 > this.yLabelWidth + 8){ | |
| this.xScalePaddingLeft = firstRotated + this.fontSize / 2; | |
| } | |
| this.xScalePaddingRight = this.fontSize/2; | |
| this.xLabelRotation++; | |
| this.xLabelWidth = cosRotation * originalLabelWidth; | |
| } | |
| if (this.xLabelRotation > 0){ | |
| this.endPoint -= Math.sin(toRadians(this.xLabelRotation))*originalLabelWidth + 3; | |
| } | |
| } | |
| else{ | |
| this.xLabelWidth = 0; | |
| this.xScalePaddingRight = this.padding; | |
| this.xScalePaddingLeft = this.padding; | |
| } | |
| }, | |
| // Needs to be overidden in each Chart type | |
| // Otherwise we need to pass all the data into the scale class | |
| calculateYRange: noop, | |
| drawingArea: function(){ | |
| return this.startPoint - this.endPoint; | |
| }, | |
| calculateY : function(value){ | |
| var scalingFactor = this.drawingArea() / (this.min - this.max); | |
| return this.endPoint - (scalingFactor * (value - this.min)); | |
| }, | |
| calculateX : function(index){ | |
| var isRotated = (this.xLabelRotation > 0), | |
| // innerWidth = (this.offsetGridLines) ? this.width - offsetLeft - this.padding : this.width - (offsetLeft + halfLabelWidth * 2) - this.padding, | |
| innerWidth = this.width - (this.xScalePaddingLeft + this.xScalePaddingRight), | |
| valueWidth = innerWidth/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--) { | |
| if (this.angleLineWidth > 0){ | |
| var outerPosition = this.getPointPosition(i, this.calculateCenterOffset(this.max)); | |
| ctx.beginPath(); | |
| ctx.moveTo(this.xCenter, this.yCenter); | |
| ctx.lineTo(outerPosition.x, outerPosition.y); | |
| ctx.stroke(); | |
| ctx.closePath(); | |
| } | |
| // Extra 3px out for some label spacing | |
| var pointLabelPosition = this.getPointPosition(i, this.calculateCenterOffset(this.max) + 5); | |
| ctx.font = fontString(this.pointLabelFontSize,this.pointLabelFontStyle,this.pointLabelFontFamily); | |
| ctx.fillStyle = this.pointLabelFontColor; | |
| var labelsCount = this.labels.length, | |
| halfLabelsCount = this.labels.length/2, | |
| quarterLabelsCount = halfLabelsCount/2, | |
| upperHalf = (i < quarterLabelsCount || i > labelsCount - quarterLabelsCount), | |
| exactQuarter = (i === quarterLabelsCount || i === labelsCount - quarterLabelsCount); | |
| if (i === 0){ | |
| ctx.textAlign = 'center'; | |
| } else if(i === halfLabelsCount){ | |
| ctx.textAlign = 'center'; | |
| } else if (i < halfLabelsCount){ | |
| ctx.textAlign = 'left'; | |
| } else { | |
| ctx.textAlign = 'right'; | |
| } | |
| // Set the correct text baseline based on outer positioning | |
| if (exactQuarter){ | |
| ctx.textBaseline = 'middle'; | |
| } else if (upperHalf){ | |
| ctx.textBaseline = 'bottom'; | |
| } else { | |
| ctx.textBaseline = 'top'; | |
| } | |
| ctx.fillText(this.labels[i], pointLabelPosition.x, pointLabelPosition.y); | |
| } | |
| } | |
| } | |
| } | |
| }); | |
| // Attach global event to resize each chart instance when the browser resizes | |
| helpers.addEvent(window, "resize", (function(){ | |
| // Basic debounce of resize function so it doesn't hurt performance when resizing browser. | |
| var timeout; | |
| return function(){ | |
| clearTimeout(timeout); | |
| timeout = setTimeout(function(){ | |
| each(Chart.instances,function(instance){ | |
| // If the responsive flag is set in the chart instance config | |
| // Cascade the resize event down to the chart. | |
| if (instance.options.responsive){ | |
| instance.resize(instance.render, true); | |
| } | |
| }); | |
| }, 50); | |
| }; | |
| })()); | |
| if (amd) { | |
| define(function(){ | |
| return Chart; | |
| }); | |
| } else if (typeof module === 'object' && module.exports) { | |
| module.exports = Chart; | |
| } | |
| root.Chart = Chart; | |
| Chart.noConflict = function(){ | |
| root.Chart = previous; | |
| return Chart; | |
| }; | |
| }).call(this); | |
| (function(){ | |
| "use strict"; | |
| var root = this, | |
| Chart = root.Chart, | |
| helpers = Chart.helpers; | |
| var defaultConfig = { | |
| //Boolean - Whether the scale should start at zero, or an order of magnitude down from the lowest value | |
| scaleBeginAtZero : true, | |
| //Boolean - Whether grid lines are shown across the chart | |
| scaleShowGridLines : true, | |
| //String - Colour of the grid lines | |
| scaleGridLineColor : "rgba(0,0,0,.05)", | |
| //Number - Width of the grid lines | |
| scaleGridLineWidth : 1, | |
| //Boolean - 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%>\"></span><%if(datasets[i].label){%><%=datasets[i].label%><%}%></li><%}%></ul>" | |
| }; | |
| Chart.Type.extend({ | |
| name: "Bar", | |
| defaults : defaultConfig, | |
| initialize: function(data){ | |
| //Expose options as a scope variable here so we can access it in the ScaleClass | |
| var options = this.options; | |
| this.ScaleClass = Chart.Scale.extend({ | |
| offsetGridLines : true, | |
| calculateBarX : function(datasetCount, datasetIndex, barIndex){ | |
| //Reusable method for calculating the xPosition of a given bar based on datasetIndex & width of the bar | |
| var xWidth = this.calculateBaseWidth(), | |
| xAbsolute = this.calculateX(barIndex) - (xWidth/2), | |
| barWidth = this.calculateBarWidth(datasetCount); | |
| return xAbsolute + (barWidth * datasetIndex) + (datasetIndex * options.barDatasetSpacing) + barWidth/2; | |
| }, | |
| calculateBaseWidth : function(){ | |
| return (this.calculateX(1) - this.calculateX(0)) - (2*options.barValueSpacing); | |
| }, | |
| calculateBarWidth : function(datasetCount){ | |
| //The padding between datasets is to the right of each bar, providing that there are more than 1 dataset | |
| var baseWidth = this.calculateBaseWidth() - ((datasetCount - 1) * options.barDatasetSpacing); | |
| return (baseWidth / datasetCount); | |
| } | |
| }); | |
| this.datasets = []; | |
| //Set up tooltip events on the chart | |
| if (this.options.showTooltips){ | |
| helpers.bindEvents(this, this.options.tooltipEvents, function(evt){ | |
| var activeBars = (evt.type !== 'mouseout') ? this.getBarsAtEvent(evt) : []; | |
| this.eachBars(function(bar){ | |
| bar.restore(['fillColor', 'strokeColor']); | |
| }); | |
| helpers.each(activeBars, function(activeBar){ | |
| activeBar.fillColor = activeBar.highlightFill; | |
| activeBar.strokeColor = activeBar.highlightStroke; | |
| }); | |
| this.showTooltip(activeBars); | |
| }); | |
| } | |
| //Declare the extension of the default point, to cater for the options passed in to the constructor | |
| this.BarClass = Chart.Rectangle.extend({ | |
| strokeWidth : this.options.barStrokeWidth, | |
| showStroke : this.options.barShowStroke, | |
| ctx : this.chart.ctx | |
| }); | |
| //Iterate through each of the datasets, and build this into a property of the chart | |
| helpers.each(data.datasets,function(dataset,datasetIndex){ | |
| var datasetObject = { | |
| label : dataset.label || null, | |
| fillColor : dataset.fillColor, | |
| strokeColor : dataset.strokeColor, | |
| bars : [] | |
| }; | |
| this.datasets.push(datasetObject); | |
| helpers.each(dataset.data,function(dataPoint,index){ | |
| //Add a new point for each piece of data, passing any required data to draw. | |
| datasetObject.bars.push(new this.BarClass({ | |
| value : dataPoint, | |
| label : data.labels[index], | |
| datasetLabel: dataset.label, | |
| strokeColor : dataset.strokeColor, | |
| fillColor : dataset.fillColor, | |
| highlightFill : dataset.highlightFill || dataset.fillColor, | |
| highlightStroke : dataset.highlightStroke || dataset.strokeColor | |
| })); | |
| },this); | |
| },this); | |
| this.buildScale(data.labels); | |
| this.BarClass.prototype.base = this.scale.endPoint; | |
| this.eachBars(function(bar, index, datasetIndex){ | |
| helpers.extend(bar, { | |
| width : this.scale.calculateBarWidth(this.datasets.length), | |
| x: this.scale.calculateBarX(this.datasets.length, datasetIndex, index), | |
| y: this.scale.endPoint | |
| }); | |
| bar.save(); | |
| }, this); | |
| this.render(); | |
| }, | |
| update : function(){ | |
| this.scale.update(); | |
| // Reset any highlight colours before updating. | |
| helpers.each(this.activeElements, function(activeElement){ | |
| activeElement.restore(['fillColor', 'strokeColor']); | |
| }); | |
| this.eachBars(function(bar){ | |
| bar.save(); | |
| }); | |
| this.render(); | |
| }, | |
| eachBars : function(callback){ | |
| helpers.each(this.datasets,function(dataset, datasetIndex){ | |
| helpers.each(dataset.bars, callback, this, datasetIndex); | |
| },this); | |
| }, | |
| getBarsAtEvent : function(e){ | |
| var barsArray = [], | |
| eventPosition = helpers.getRelativePosition(e), | |
| datasetIterator = function(dataset){ | |
| barsArray.push(dataset.bars[barIndex]); | |
| }, | |
| barIndex; | |
| for (var datasetIndex = 0; datasetIndex < this.datasets.length; datasetIndex++) { | |
| for (barIndex = 0; barIndex < this.datasets[datasetIndex].bars.length; barIndex++) { | |
| if (this.datasets[datasetIndex].bars[barIndex].inRange(eventPosition.x,eventPosition.y)){ | |
| helpers.each(this.datasets, datasetIterator); | |
| return barsArray; | |
| } | |
| } | |
| } | |
| return barsArray; | |
| }, | |
| buildScale : function(labels){ | |
| var self = this; | |
| var dataTotal = function(){ | |
| var values = []; | |
| self.eachBars(function(bar){ | |
| values.push(bar.value); | |
| }); | |
| return values; | |
| }; | |
| var scaleOptions = { | |
| templateString : this.options.scaleLabel, | |
| height : this.chart.height, | |
| width : this.chart.width, | |
| ctx : this.chart.ctx, | |
| textColor : this.options.scaleFontColor, | |
| fontSize : this.options.scaleFontSize, | |
| fontStyle : this.options.scaleFontStyle, | |
| fontFamily : this.options.scaleFontFamily, | |
| valuesCount : labels.length, | |
| beginAtZero : this.options.scaleBeginAtZero, | |
| integersOnly : this.options.scaleIntegersOnly, | |
| calculateYRange: function(currentHeight){ | |
| var updatedRanges = helpers.calculateScaleRange( | |
| dataTotal(), | |
| currentHeight, | |
| this.fontSize, | |
| this.beginAtZero, | |
| this.integersOnly | |
| ); | |
| helpers.extend(this, updatedRanges); | |
| }, | |
| xLabels : labels, | |
| font : helpers.fontString(this.options.scaleFontSize, this.options.scaleFontStyle, this.options.scaleFontFamily), | |
| lineWidth : this.options.scaleLineWidth, | |
| lineColor : this.options.scaleLineColor, | |
| 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, | |
| 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 - The angle to start the first segment stroke | |
| rotation: 0, | |
| //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)*(Math.abs(value) / this.total); | |
| }, | |
| 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); | |
| if (index === 0){ | |
| segment.startAngle = (this.options.rotation-90) * Math.PI / 180; | |
| } | |
| segment.endAngle = segment.startAngle + segment.circumference; | |
| segment.draw(); | |
| //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%>\"></span><%if(datasets[i].label){%><%=datasets[i].label%><%}%></li><%}%></ul>" | |
| }; | |
| Chart.Type.extend({ | |
| name: "Line", | |
| defaults : defaultConfig, | |
| initialize: function(data){ | |
| //Declare the extension of the default point, to cater for the options passed in to the constructor | |
| this.PointClass = Chart.Point.extend({ | |
| strokeWidth : this.options.pointDotStrokeWidth, | |
| radius : this.options.pointDotRadius, | |
| display: this.options.pointDot, | |
| hitDetectionRadius : this.options.pointHitDetectionRadius, | |
| ctx : this.chart.ctx, | |
| inRange : function(mouseX){ | |
| return (Math.pow(mouseX-this.x, 2) < Math.pow(this.radius + this.hitDetectionRadius,2)); | |
| } | |
| }); | |
| this.datasets = []; | |
| //Set up tooltip events on the chart | |
| if (this.options.showTooltips){ | |
| helpers.bindEvents(this, this.options.tooltipEvents, function(evt){ | |
| var activePoints = (evt.type !== 'mouseout') ? this.getPointsAtEvent(evt) : []; | |
| this.eachPoints(function(point){ | |
| point.restore(['fillColor', 'strokeColor']); | |
| }); | |
| helpers.each(activePoints, function(activePoint){ | |
| activePoint.fillColor = activePoint.highlightFill; | |
| activePoint.strokeColor = activePoint.highlightStroke; | |
| }); | |
| this.showTooltip(activePoints); | |
| }); | |
| } | |
| //Iterate through each of the datasets, and build this into a property of the chart | |
| helpers.each(data.datasets,function(dataset){ | |
| var datasetObject = { | |
| label : dataset.label || null, | |
| fillColor : dataset.fillColor, | |
| strokeColor : dataset.strokeColor, | |
| pointColor : dataset.pointColor, | |
| pointStrokeColor : dataset.pointStrokeColor, | |
| points : [] | |
| }; | |
| this.datasets.push(datasetObject); | |
| helpers.each(dataset.data,function(dataPoint,index){ | |
| //Add a new point for each piece of data, passing any required data to draw. | |
| datasetObject.points.push(new this.PointClass({ | |
| value : dataPoint, | |
| label : data.labels[index], | |
| datasetLabel: dataset.label, | |
| strokeColor : dataset.pointStrokeColor, | |
| fillColor : dataset.pointColor, | |
| highlightFill : dataset.pointHighlightFill || dataset.pointColor, | |
| highlightStroke : dataset.pointHighlightStroke || dataset.pointStrokeColor | |
| })); | |
| },this); | |
| this.buildScale(data.labels); | |
| this.eachPoints(function(point, index){ | |
| helpers.extend(point, { | |
| x: this.scale.calculateX(index), | |
| y: this.scale.endPoint | |
| }); | |
| point.save(); | |
| }, this); | |
| },this); | |
| this.render(); | |
| }, | |
| update : function(){ | |
| this.scale.update(); | |
| // Reset any highlight colours before updating. | |
| helpers.each(this.activeElements, function(activeElement){ | |
| activeElement.restore(['fillColor', 'strokeColor']); | |
| }); | |
| this.eachPoints(function(point){ | |
| point.save(); | |
| }); | |
| this.render(); | |
| }, | |
| eachPoints : function(callback){ | |
| helpers.each(this.datasets,function(dataset){ | |
| helpers.each(dataset.points,callback,this); | |
| },this); | |
| }, | |
| getPointsAtEvent : function(e){ | |
| var pointsArray = [], | |
| eventPosition = helpers.getRelativePosition(e); | |
| helpers.each(this.datasets,function(dataset){ | |
| helpers.each(dataset.points,function(point){ | |
| if (point.inRange(eventPosition.x,eventPosition.y)) pointsArray.push(point); | |
| }); | |
| },this); | |
| return pointsArray; | |
| }, | |
| buildScale : function(labels){ | |
| var self = this; | |
| var dataTotal = function(){ | |
| var values = []; | |
| self.eachPoints(function(point){ | |
| values.push(point.value); | |
| }); | |
| return values; | |
| }; | |
| var scaleOptions = { | |
| templateString : this.options.scaleLabel, | |
| height : this.chart.height, | |
| width : this.chart.width, | |
| ctx : this.chart.ctx, | |
| textColor : this.options.scaleFontColor, | |
| fontSize : this.options.scaleFontSize, | |
| fontStyle : this.options.scaleFontStyle, | |
| fontFamily : this.options.scaleFontFamily, | |
| valuesCount : labels.length, | |
| beginAtZero : this.options.scaleBeginAtZero, | |
| integersOnly : this.options.scaleIntegersOnly, | |
| calculateYRange : function(currentHeight){ | |
| var updatedRanges = helpers.calculateScaleRange( | |
| dataTotal(), | |
| currentHeight, | |
| this.fontSize, | |
| this.beginAtZero, | |
| this.integersOnly | |
| ); | |
| helpers.extend(this, updatedRanges); | |
| }, | |
| xLabels : labels, | |
| font : helpers.fontString(this.options.scaleFontSize, this.options.scaleFontStyle, this.options.scaleFontFamily), | |
| lineWidth : this.options.scaleLineWidth, | |
| lineColor : this.options.scaleLineColor, | |
| 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, | |
| x: this.scale.calculateX(this.scale.valuesCount+1), | |
| y: this.scale.endPoint, | |
| strokeColor : this.datasets[datasetIndex].pointStrokeColor, | |
| fillColor : this.datasets[datasetIndex].pointColor | |
| })); | |
| },this); | |
| this.scale.addXLabel(label); | |
| //Then re-render the chart. | |
| this.update(); | |
| }, | |
| removeData : function(){ | |
| this.scale.removeXLabel(); | |
| //Then re-render the chart. | |
| helpers.each(this.datasets,function(dataset){ | |
| dataset.points.shift(); | |
| },this); | |
| this.update(); | |
| }, | |
| reflow : function(){ | |
| var newScaleProps = helpers.extend({ | |
| height : this.chart.height, | |
| width : this.chart.width | |
| }); | |
| this.scale.update(newScaleProps); | |
| }, | |
| draw : function(ease){ | |
| var easingDecimal = ease || 1; | |
| this.clear(); | |
| var ctx = this.chart.ctx; | |
| // Some helper methods for getting the next/prev points | |
| var hasValue = function(item){ | |
| return item.value !== null; | |
| }, | |
| nextPoint = function(point, collection, index){ | |
| return helpers.findNextWhere(collection, hasValue, index) || point; | |
| }, | |
| previousPoint = function(point, collection, index){ | |
| return helpers.findPreviousWhere(collection, hasValue, index) || point; | |
| }; | |
| this.scale.draw(easingDecimal); | |
| helpers.each(this.datasets,function(dataset){ | |
| var pointsWithValues = helpers.where(dataset.points, hasValue); | |
| //Transition each point first so that the line and point drawing isn't out of sync | |
| //We can use this extra loop to calculate the control points of this dataset also in this loop | |
| helpers.each(dataset.points, function(point, index){ | |
| if (point.hasValue()){ | |
| point.transition({ | |
| y : this.scale.calculateY(point.value), | |
| x : this.scale.calculateX(index) | |
| }, easingDecimal); | |
| } | |
| },this); | |
| // Control points need to be calculated in a seperate loop, because we need to know the current x/y of the point | |
| // This would cause issues when there is no animation, because the y of the next point would be 0, so beziers would be skewed | |
| if (this.options.bezierCurve){ | |
| helpers.each(pointsWithValues, function(point, index){ | |
| var tension = (index > 0 && index < pointsWithValues.length - 1) ? this.options.bezierCurveTension : 0; | |
| point.controlPoints = helpers.splineCurve( | |
| previousPoint(point, pointsWithValues, index), | |
| point, | |
| nextPoint(point, pointsWithValues, index), | |
| tension | |
| ); | |
| // Prevent the bezier going outside of the bounds of the graph | |
| // Cap puter bezier handles to the upper/lower scale bounds | |
| if (point.controlPoints.outer.y > this.scale.endPoint){ | |
| point.controlPoints.outer.y = this.scale.endPoint; | |
| } | |
| else if (point.controlPoints.outer.y < this.scale.startPoint){ | |
| point.controlPoints.outer.y = this.scale.startPoint; | |
| } | |
| // Cap inner bezier handles to the upper/lower scale bounds | |
| if (point.controlPoints.inner.y > this.scale.endPoint){ | |
| point.controlPoints.inner.y = this.scale.endPoint; | |
| } | |
| else if (point.controlPoints.inner.y < this.scale.startPoint){ | |
| point.controlPoints.inner.y = this.scale.startPoint; | |
| } | |
| },this); | |
| } | |
| //Draw the line between all the points | |
| ctx.lineWidth = this.options.datasetStrokeWidth; | |
| ctx.strokeStyle = dataset.strokeColor; | |
| ctx.beginPath(); | |
| helpers.each(pointsWithValues, function(point, index){ | |
| if (index === 0){ | |
| ctx.moveTo(point.x, point.y); | |
| } | |
| else{ | |
| if(this.options.bezierCurve){ | |
| var previous = previousPoint(point, pointsWithValues, index); | |
| ctx.bezierCurveTo( | |
| previous.controlPoints.outer.x, | |
| previous.controlPoints.outer.y, | |
| point.controlPoints.inner.x, | |
| point.controlPoints.inner.y, | |
| point.x, | |
| point.y | |
| ); | |
| } | |
| else{ | |
| ctx.lineTo(point.x,point.y); | |
| } | |
| } | |
| }, this); | |
| ctx.stroke(); | |
| if (this.options.datasetFill && pointsWithValues.length > 0){ | |
| //Round off the line by going to the base of the chart, back to the start, then fill. | |
| ctx.lineTo(pointsWithValues[pointsWithValues.length - 1].x, this.scale.endPoint); | |
| ctx.lineTo(pointsWithValues[0].x, this.scale.endPoint); | |
| ctx.fillStyle = dataset.fillColor; | |
| ctx.closePath(); | |
| ctx.fill(); | |
| } | |
| //Now draw the points over the line | |
| //A little inefficient double looping, but better than the line | |
| //lagging behind the point positions | |
| helpers.each(pointsWithValues,function(point){ | |
| point.draw(); | |
| }); | |
| },this); | |
| } | |
| }); | |
| }).call(this); | |
| (function(){ | |
| "use strict"; | |
| var root = this, | |
| Chart = root.Chart, | |
| //Cache a local reference to Chart.helpers | |
| helpers = Chart.helpers; | |
| var defaultConfig = { | |
| //Boolean - Show a backdrop to the scale label | |
| scaleShowLabelBackdrop : true, | |
| //String - The colour of the label backdrop | |
| scaleBackdropColor : "rgba(255,255,255,0.75)", | |
| // Boolean - Whether the scale should begin at zero | |
| scaleBeginAtZero : true, | |
| //Number - The backdrop padding above & below the label in pixels | |
| scaleBackdropPaddingY : 2, | |
| //Number - The backdrop padding to the side of the label in pixels | |
| scaleBackdropPaddingX : 2, | |
| //Boolean - Show line for each value in the scale | |
| scaleShowLine : true, | |
| //Boolean - Stroke a line around each segment in the chart | |
| segmentShowStroke : true, | |
| //String - The colour of the stroke on each segement. | |
| segmentStrokeColor : "#fff", | |
| //Number - The width of the stroke value in pixels | |
| segmentStrokeWidth : 2, | |
| //Number - Amount of animation steps | |
| animationSteps : 100, | |
| //String - Animation easing effect. | |
| animationEasing : "easeOutBounce", | |
| //Boolean - Whether to animate the rotation of the chart | |
| animateRotate : true, | |
| //Boolean - Whether to animate scaling the chart from the centre | |
| animateScale : false, | |
| //String - A legend template | |
| legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<segments.length; i++){%><li><span style=\"background-color:<%=segments[i].fillColor%>\"></span><%if(segments[i].label){%><%=segments[i].label%><%}%></li><%}%></ul>" | |
| }; | |
| Chart.Type.extend({ | |
| //Passing in a name registers this chart in the Chart namespace | |
| name: "PolarArea", | |
| //Providing a defaults will also register the deafults in the chart namespace | |
| defaults : defaultConfig, | |
| //Initialize is fired when the chart is initialized - Data is passed in as a parameter | |
| //Config is automatically merged by the core of Chart.js, and is available at this.options | |
| initialize: function(data){ | |
| this.segments = []; | |
| //Declare segment class as a chart instance specific class, so it can share props for this instance | |
| this.SegmentArc = Chart.Arc.extend({ | |
| showStroke : this.options.segmentShowStroke, | |
| strokeWidth : this.options.segmentStrokeWidth, | |
| strokeColor : this.options.segmentStrokeColor, | |
| ctx : this.chart.ctx, | |
| innerRadius : 0, | |
| x : this.chart.width/2, | |
| y : this.chart.height/2 | |
| }); | |
| this.scale = new Chart.RadialScale({ | |
| display: this.options.showScale, | |
| fontStyle: this.options.scaleFontStyle, | |
| fontSize: this.options.scaleFontSize, | |
| fontFamily: this.options.scaleFontFamily, | |
| fontColor: this.options.scaleFontColor, | |
| showLabels: this.options.scaleShowLabels, | |
| showLabelBackdrop: this.options.scaleShowLabelBackdrop, | |
| backdropColor: this.options.scaleBackdropColor, | |
| backdropPaddingY : this.options.scaleBackdropPaddingY, | |
| backdropPaddingX: this.options.scaleBackdropPaddingX, | |
| lineWidth: (this.options.scaleShowLine) ? this.options.scaleLineWidth : 0, | |
| lineColor: this.options.scaleLineColor, | |
| lineArc: true, | |
| width: this.chart.width, | |
| height: this.chart.height, | |
| xCenter: this.chart.width/2, | |
| yCenter: this.chart.height/2, | |
| ctx : this.chart.ctx, | |
| templateString: this.options.scaleLabel, | |
| valuesCount: data.length | |
| }); | |
| this.updateScaleRange(data); | |
| this.scale.update(); | |
| helpers.each(data,function(segment,index){ | |
| this.addData(segment,index,true); | |
| },this); | |
| //Set up tooltip events on the chart | |
| if (this.options.showTooltips){ | |
| helpers.bindEvents(this, this.options.tooltipEvents, function(evt){ | |
| var activeSegments = (evt.type !== 'mouseout') ? this.getSegmentsAtEvent(evt) : []; | |
| helpers.each(this.segments,function(segment){ | |
| segment.restore(["fillColor"]); | |
| }); | |
| helpers.each(activeSegments,function(activeSegment){ | |
| activeSegment.fillColor = activeSegment.highlightColor; | |
| }); | |
| this.showTooltip(activeSegments); | |
| }); | |
| } | |
| this.render(); | |
| }, | |
| getSegmentsAtEvent : function(e){ | |
| var segmentsArray = []; | |
| var location = helpers.getRelativePosition(e); | |
| helpers.each(this.segments,function(segment){ | |
| if (segment.inRange(location.x,location.y)) segmentsArray.push(segment); | |
| },this); | |
| return segmentsArray; | |
| }, | |
| addData : function(segment, atIndex, silent){ | |
| var index = atIndex || this.segments.length; | |
| this.segments.splice(index, 0, new this.SegmentArc({ | |
| fillColor: segment.color, | |
| highlightColor: segment.highlight || segment.color, | |
| label: segment.label, | |
| value: segment.value, | |
| outerRadius: (this.options.animateScale) ? 0 : this.scale.calculateCenterOffset(segment.value), | |
| circumference: (this.options.animateRotate) ? 0 : this.scale.getCircumference(), | |
| startAngle: Math.PI * 1.5 | |
| })); | |
| if (!silent){ | |
| this.reflow(); | |
| this.update(); | |
| } | |
| }, | |
| removeData: function(atIndex){ | |
| var indexToDelete = (helpers.isNumber(atIndex)) ? atIndex : this.segments.length-1; | |
| this.segments.splice(indexToDelete, 1); | |
| this.reflow(); | |
| this.update(); | |
| }, | |
| calculateTotal: function(data){ | |
| this.total = 0; | |
| helpers.each(data,function(segment){ | |
| this.total += segment.value; | |
| },this); | |
| this.scale.valuesCount = this.segments.length; | |
| }, | |
| updateScaleRange: function(datapoints){ | |
| var valuesArray = []; | |
| helpers.each(datapoints,function(segment){ | |
| valuesArray.push(segment.value); | |
| }); | |
| var scaleSizes = (this.options.scaleOverride) ? | |
| { | |
| steps: this.options.scaleSteps, | |
| stepValue: this.options.scaleStepWidth, | |
| min: this.options.scaleStartValue, | |
| max: this.options.scaleStartValue + (this.options.scaleSteps * this.options.scaleStepWidth) | |
| } : | |
| helpers.calculateScaleRange( | |
| valuesArray, | |
| helpers.min([this.chart.width, this.chart.height])/2, | |
| this.options.scaleFontSize, | |
| this.options.scaleBeginAtZero, | |
| this.options.scaleIntegersOnly | |
| ); | |
| helpers.extend( | |
| this.scale, | |
| scaleSizes, | |
| { | |
| size: helpers.min([this.chart.width, this.chart.height]), | |
| xCenter: this.chart.width/2, | |
| yCenter: this.chart.height/2 | |
| } | |
| ); | |
| }, | |
| update : function(){ | |
| this.calculateTotal(this.segments); | |
| helpers.each(this.segments,function(segment){ | |
| segment.save(); | |
| }); | |
| this.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%>\"></span><%if(datasets[i].label){%><%=datasets[i].label%><%}%></li><%}%></ul>" | |
| }, | |
| initialize: function(data){ | |
| this.PointClass = Chart.Point.extend({ | |
| strokeWidth : this.options.pointDotStrokeWidth, | |
| radius : this.options.pointDotRadius, | |
| display: this.options.pointDot, | |
| hitDetectionRadius : this.options.pointHitDetectionRadius, | |
| ctx : this.chart.ctx | |
| }); | |
| this.datasets = []; | |
| this.buildScale(data); | |
| //Set up tooltip events on the chart | |
| if (this.options.showTooltips){ | |
| helpers.bindEvents(this, this.options.tooltipEvents, function(evt){ | |
| var activePointsCollection = (evt.type !== 'mouseout') ? this.getPointsAtEvent(evt) : []; | |
| this.eachPoints(function(point){ | |
| point.restore(['fillColor', 'strokeColor']); | |
| }); | |
| helpers.each(activePointsCollection, function(activePoint){ | |
| activePoint.fillColor = activePoint.highlightFill; | |
| activePoint.strokeColor = activePoint.highlightStroke; | |
| }); | |
| this.showTooltip(activePointsCollection); | |
| }); | |
| } | |
| //Iterate through each of the datasets, and build this into a property of the chart | |
| helpers.each(data.datasets,function(dataset){ | |
| var datasetObject = { | |
| label: dataset.label || null, | |
| fillColor : dataset.fillColor, | |
| strokeColor : dataset.strokeColor, | |
| pointColor : dataset.pointColor, | |
| pointStrokeColor : dataset.pointStrokeColor, | |
| points : [] | |
| }; | |
| this.datasets.push(datasetObject); | |
| helpers.each(dataset.data,function(dataPoint,index){ | |
| //Add a new point for each piece of data, passing any required data to draw. | |
| var pointPosition; | |
| if (!this.scale.animation){ | |
| pointPosition = this.scale.getPointPosition(index, this.scale.calculateCenterOffset(dataPoint)); | |
| } | |
| datasetObject.points.push(new this.PointClass({ | |
| value : dataPoint, | |
| label : data.labels[index], | |
| datasetLabel: dataset.label, | |
| x: (this.options.animation) ? this.scale.xCenter : pointPosition.x, | |
| y: (this.options.animation) ? this.scale.yCenter : pointPosition.y, | |
| strokeColor : dataset.pointStrokeColor, | |
| fillColor : dataset.pointColor, | |
| highlightFill : dataset.pointHighlightFill || dataset.pointColor, | |
| highlightStroke : dataset.pointHighlightStroke || dataset.pointStrokeColor | |
| })); | |
| },this); | |
| },this); | |
| this.render(); | |
| }, | |
| eachPoints : function(callback){ | |
| helpers.each(this.datasets,function(dataset){ | |
| helpers.each(dataset.points,callback,this); | |
| },this); | |
| }, | |
| getPointsAtEvent : function(evt){ | |
| var mousePosition = helpers.getRelativePosition(evt), | |
| fromCenter = helpers.getAngleFromPoint({ | |
| x: this.scale.xCenter, | |
| y: this.scale.yCenter | |
| }, mousePosition); | |
| var anglePerIndex = (Math.PI * 2) /this.scale.valuesCount, | |
| pointIndex = Math.round((fromCenter.angle - Math.PI * 1.5) / anglePerIndex), | |
| activePointsCollection = []; | |
| // If we're at the top, make the pointIndex 0 to get the first of the array. | |
| if (pointIndex >= this.scale.valuesCount || pointIndex < 0){ | |
| pointIndex = 0; | |
| } | |
| if (fromCenter.distance <= this.scale.drawingArea){ | |
| helpers.each(this.datasets, function(dataset){ | |
| activePointsCollection.push(dataset.points[pointIndex]); | |
| }); | |
| } | |
| return activePointsCollection; | |
| }, | |
| buildScale : function(data){ | |
| this.scale = new Chart.RadialScale({ | |
| display: this.options.showScale, | |
| fontStyle: this.options.scaleFontStyle, | |
| fontSize: this.options.scaleFontSize, | |
| fontFamily: this.options.scaleFontFamily, | |
| fontColor: this.options.scaleFontColor, | |
| showLabels: this.options.scaleShowLabels, | |
| showLabelBackdrop: this.options.scaleShowLabelBackdrop, | |
| backdropColor: this.options.scaleBackdropColor, | |
| backdropPaddingY : this.options.scaleBackdropPaddingY, | |
| backdropPaddingX: this.options.scaleBackdropPaddingX, | |
| lineWidth: (this.options.scaleShowLine) ? this.options.scaleLineWidth : 0, | |
| lineColor: this.options.scaleLineColor, | |
| angleLineColor : this.options.angleLineColor, | |
| angleLineWidth : (this.options.angleShowLineOut) ? this.options.angleLineWidth : 0, | |
| // Point labels at the edge of each line | |
| pointLabelFontColor : this.options.pointLabelFontColor, | |
| pointLabelFontSize : this.options.pointLabelFontSize, | |
| pointLabelFontFamily : this.options.pointLabelFontFamily, | |
| pointLabelFontStyle : this.options.pointLabelFontStyle, | |
| height : this.chart.height, | |
| width: this.chart.width, | |
| xCenter: this.chart.width/2, | |
| yCenter: this.chart.height/2, | |
| ctx : this.chart.ctx, | |
| templateString: this.options.scaleLabel, | |
| labels: data.labels, | |
| valuesCount: data.datasets[0].data.length | |
| }); | |
| this.scale.setScaleSize(); | |
| this.updateScaleRange(data.datasets); | |
| this.scale.buildYLabels(); | |
| }, | |
| updateScaleRange: function(datasets){ | |
| var valuesArray = (function(){ | |
| var totalDataArray = []; | |
| helpers.each(datasets,function(dataset){ | |
| if (dataset.data){ | |
| totalDataArray = totalDataArray.concat(dataset.data); | |
| } | |
| else { | |
| helpers.each(dataset.points, function(point){ | |
| totalDataArray.push(point.value); | |
| }); | |
| } | |
| }); | |
| return totalDataArray; | |
| })(); | |
| var scaleSizes = (this.options.scaleOverride) ? | |
| { | |
| steps: this.options.scaleSteps, | |
| stepValue: this.options.scaleStepWidth, | |
| min: this.options.scaleStartValue, | |
| max: this.options.scaleStartValue + (this.options.scaleSteps * this.options.scaleStepWidth) | |
| } : | |
| helpers.calculateScaleRange( | |
| valuesArray, | |
| helpers.min([this.chart.width, this.chart.height])/2, | |
| this.options.scaleFontSize, | |
| this.options.scaleBeginAtZero, | |
| this.options.scaleIntegersOnly | |
| ); | |
| helpers.extend( | |
| this.scale, | |
| scaleSizes | |
| ); | |
| }, | |
| addData : function(valuesArray,label){ | |
| //Map the values array for each of the datasets | |
| this.scale.valuesCount++; | |
| helpers.each(valuesArray,function(value,datasetIndex){ | |
| var pointPosition = this.scale.getPointPosition(this.scale.valuesCount, this.scale.calculateCenterOffset(value)); | |
| this.datasets[datasetIndex].points.push(new this.PointClass({ | |
| value : value, | |
| label : label, | |
| x: pointPosition.x, | |
| y: pointPosition.y, | |
| strokeColor : this.datasets[datasetIndex].pointStrokeColor, | |
| fillColor : this.datasets[datasetIndex].pointColor | |
| })); | |
| },this); | |
| this.scale.labels.push(label); | |
| this.reflow(); | |
| this.update(); | |
| }, | |
| removeData : function(){ | |
| this.scale.valuesCount--; | |
| this.scale.labels.shift(); | |
| helpers.each(this.datasets,function(dataset){ | |
| dataset.points.shift(); | |
| },this); | |
| this.reflow(); | |
| this.update(); | |
| }, | |
| update : function(){ | |
| this.eachPoints(function(point){ | |
| point.save(); | |
| }); | |
| this.reflow(); | |
| this.render(); | |
| }, | |
| reflow: function(){ | |
| helpers.extend(this.scale, { | |
| width : this.chart.width, | |
| height: this.chart.height, | |
| size : helpers.min([this.chart.width, this.chart.height]), | |
| xCenter: this.chart.width/2, | |
| yCenter: this.chart.height/2 | |
| }); | |
| this.updateScaleRange(this.datasets); | |
| this.scale.setScaleSize(); | |
| this.scale.buildYLabels(); | |
| }, | |
| draw : function(ease){ | |
| var easeDecimal = ease || 1, | |
| ctx = this.chart.ctx; | |
| this.clear(); | |
| this.scale.draw(); | |
| helpers.each(this.datasets,function(dataset){ | |
| //Transition each point first so that the line and point drawing isn't out of sync | |
| helpers.each(dataset.points,function(point,index){ | |
| if (point.hasValue()){ | |
| point.transition(this.scale.getPointPosition(index, this.scale.calculateCenterOffset(point.value)), easeDecimal); | |
| } | |
| },this); | |
| //Draw the line between all the points | |
| ctx.lineWidth = this.options.datasetStrokeWidth; | |
| ctx.strokeStyle = dataset.strokeColor; | |
| ctx.beginPath(); | |
| helpers.each(dataset.points,function(point,index){ | |
| if (index === 0){ | |
| ctx.moveTo(point.x,point.y); | |
| } | |
| else{ | |
| ctx.lineTo(point.x,point.y); | |
| } | |
| },this); | |
| ctx.closePath(); | |
| ctx.stroke(); | |
| ctx.fillStyle = dataset.fillColor; | |
| ctx.fill(); | |
| //Now draw the points over the line | |
| //A little inefficient double looping, but better than the line | |
| //lagging behind the point positions | |
| helpers.each(dataset.points,function(point){ | |
| if (point.hasValue()){ | |
| point.draw(); | |
| } | |
| }); | |
| },this); | |
| } | |
| }); | |
| }).call(this); |
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