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Chart.js
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Chart.js
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/*!
* Chart.js
* http://chartjs.org/
*
* Copyright 2013 Nick Downie
* Released under the MIT license
* https://github.com/nnnick/Chart.js/blob/master/LICENSE.md
*
* Refactored by Theodore Schnepper
*/
//Define the global Chart Variable as a class.
(function(){
(function(){
function Color( r, g, b ){
this._red = r;
this._green = g;
this._blue = b;
}
function red(){
return this._red;
}
function green(){
return this._green;
}
function blue(){
return this._blue;
}
function toRGBAStringWithAlpha( alpha ){
if( alpha === undefined ){
alpha = 1;
}
return "rgba(" + this._red + "," + this._green + "," + this._blue + "," + alpha + ")";
}
function toString(){
return this.toRGBAStringWithAlpha();
}
function brightness(){
return (this._red + this._green + this._blue) / 3;
}
function brightnessDistance(){
return Math.sqrt( (this._red*this._red) + (this._green*this._green) + (this._blue*this._blue) );
}
function createColorBetweenThresholds( rng, lower, upper ){
if(lower === undefined ){
lower = Color.Gray.brightnessDistance();
}
if( upper === undefined ){
upper = Color.BrightnessTest.brightnessDistance();
}
var color = new Color( 0, 0, 0 );
while( color.brightnessDistance() > upper || color.brightnessDistance() < lower ){
color = new Color( rng.randBetween( 0, 255 ), rng.randBetween( 0, 255 ), rng.randBetween( 0, 255 ) );
}
return color;
}
window.Color = Color;
Color.prototype.constructor = Color;
Color.prototype = {};
Color.prototype.red = red;
Color.prototype.green = green;
Color.prototype.blue = blue;
Color.prototype.brightness = brightness;
Color.prototype.brightnessDistance = brightnessDistance;
Color.prototype.toRGBAStringWithAlpha = toRGBAStringWithAlpha;
Color.prototype.toString = toString;
Color.createColorBetweenThresholds = createColorBetweenThresholds;
Color.White = new Color( 255, 255, 255 );
Color.Gray = new Color( 128, 128, 128 );
Color.Grey = Color.Gray;
Color.LightGray = new Color( 238, 238, 238 );
Color.LightGrey = Color.LighGray;
Color.BrightnessTest = new Color( 204, 204, 204 );
})();
(function(){
function RNG( seed ){
var d = new Date();
if( seed === undefined ){
this._seed = 2345678901 + (d.getSeconds() * 0xFFFFFF) + (d.getMinutes() * 0xFFFF);
} else {
this._seed = seed;
}
this._A = 48271;
this._M = 2147483647;
this._Q = this._M / this._A;
this._R = this._M % this._A;
this._oneOverM = 1.0 / this._M;
}
function next(){
var hi = this._seed / this._Q;
var lo = this._seed % this._Q;
var test = this._A * lo - this._R * hi;
if(test > 0){
this._seed = test;
} else {
this._seed = test + this._M;
}
return (this._seed * this._oneOverM);
}
function randBetween(Min, Max){
return Math.round((Max-Min) * this.next() + Min);
}
var rngs = {};
function rng( seed ){
if(!seed){
return null;
}
if(!isset( rngs[seed] ) ){
rngs[seed] = new RNG(seed);
}
return rngs[seed];
}
window.RNG = RNG;
RNG.prototype.constructor = RNG;
RNG.prototype = {};
RNG.prototype.next = next;
RNG.prototype.randBetween = randBetween;
RNG.rng = rng;
})();
(function(){
function Chart(context){
if(!context){
return;
}
this._chart = this;
this._context = context;
this._config = this.defaults;
this._rand = new RNG( 0xaece37 );
// var chart = this;
//Easing functions adapted from Robert Penner's easing equations
//http://www.robertpenner.com/easing/
//Variables global to the chart
this._width = context.canvas.width;
this._height = context.canvas.height;
//High pixel density displays - multiply the size of the canvas height/width by the device pixel ratio, then scale.
if (window.devicePixelRatio) {
this._context.canvas.style.width = this._width + "px";
this._context.canvas.style.height = this._height + "px";
this._context.canvas.height = this._height * window.devicePixelRatio;
this._context.canvas.width = this._width * window.devicePixelRatio;
this._context.scale(window.devicePixelRatio, window.devicePixelRatio);
}
}
function clear(c){
c.clearRect(0, 0, this._width, this._height);
}
function calculateOffset(val,calculatedScale,scaleHop){
var outerValue = calculatedScale.steps * calculatedScale.stepValue;
var adjustedValue = val - calculatedScale.graphMin;
var scalingFactor = this.CapValue(adjustedValue/outerValue,1,0);
return (scaleHop*calculatedScale.steps) * scalingFactor;
}
function animationLoop(config,drawScale,drawData,ctx){
var animFrameAmount = (config.animation)? 1/this.CapValue(config.animationSteps,Number.MAX_VALUE,1) : 1;
easingFunction = this.animationOptions[config.animationEasing];
percentAnimComplete =(config.animation)? 0 : 1;
if (typeof drawScale !== "function") drawScale = function(){};
requestAnimFrame(animLoop.bind(this));
function animateFrame(){
var easeAdjustedAnimationPercent =(config.animation)? this.CapValue(easingFunction(percentAnimComplete),null,0) : 1;
this.clear(this._context);
if(config.scaleOverlay){
(drawData.bind(this))(easeAdjustedAnimationPercent);
if( this.drawScale ){
this.drawScale();
}
} else {
if( this.drawScale ){
this.drawScale();
}
(drawData.bind(this))(easeAdjustedAnimationPercent);
}
}
function animLoop(){
//We need to check if the animation is incomplete (less than 1), or complete (1).
percentAnimComplete += animFrameAmount;
(animateFrame.bind(this))();
//Stop the loop continuing forever
if (percentAnimComplete <= 1){
requestAnimFrame(animLoop.bind(this));
}
else{
if (typeof config.onAnimationComplete == "function") config.onAnimationComplete();
}
}
}
var magnitude = 5;
//Declare global functions to be called within this namespace here.
function calculateScale(drawingHeight,maxSteps,minSteps,maxValue,minValue,labelTemplateString){
var graphMin,graphMax,graphRange,stepValue,numberOfSteps,valueRange,rangeOrderOfMagnitude,decimalNum;
valueRange = maxValue - minValue;
rangeOrderOfMagnitude = calculateOrderOfMagnitude(valueRange);
graphMin = Math.min(Math.floor(minValue / (1 * Math.pow(magnitude, rangeOrderOfMagnitude))) * Math.pow(magnitude, rangeOrderOfMagnitude), 0);
graphMax = Math.ceil(maxValue / (1 * Math.pow(magnitude, rangeOrderOfMagnitude))) * Math.pow(magnitude, rangeOrderOfMagnitude);
graphRange = graphMax - graphMin;
stepValue = Math.pow(magnitude, rangeOrderOfMagnitude);
numberOfSteps = Math.round(graphRange / stepValue);
//Compare number of steps to the max and min for that size graph, and add in half steps if need be.
while(numberOfSteps < minSteps || numberOfSteps > maxSteps) {
if (numberOfSteps < minSteps){
stepValue /= 2;
numberOfSteps = Math.round(graphRange/stepValue);
}
else{
stepValue *=2;
numberOfSteps = Math.round(graphRange/stepValue);
}
}
var labels = [];
populateLabels(labelTemplateString, labels, numberOfSteps, graphMin, stepValue);
return {
steps : numberOfSteps,
stepValue : stepValue,
graphMin : graphMin,
labels : labels
};
function calculateOrderOfMagnitude(val){
return Math.floor(Math.log(val) / Math.log(magnitude));
}
}
//Populate an array of all the labels by interpolating the string.
function populateLabels(labelTemplateString, labels, numberOfSteps, graphMin, stepValue) {
if (labelTemplateString) {
//Fix floating point errors by setting to fixed the on the same decimal as the stepValue.
for (var i = 1; i < numberOfSteps + 1; i++) {
labels.push(tmpl(labelTemplateString, {value: (graphMin + (stepValue * i)).toFixed(getDecimalPlaces(stepValue))}));
}
}
}
//Max value from array
function Max( array ){
return Math.max.apply( Math, array );
}
//Min value from array
function Min( array ){
return Math.min.apply( Math, array );
}
//Default if undefined
function Default(userDeclared,valueIfFalse){
if(!userDeclared){
return valueIfFalse;
} else {
return userDeclared;
}
}
//Is a number function
function isNumber(n) {
return !isNaN(parseFloat(n)) && isFinite(n);
}
//Apply cap a value at a high or low number
function CapValue(valueToCap, maxValue, minValue){
if(isNumber(maxValue)) {
if( valueToCap > maxValue ) {
return maxValue;
}
}
if(isNumber(minValue)){
if ( valueToCap < minValue ){
return minValue;
}
}
return valueToCap;
}
function getDecimalPlaces (num){
var numberOfDecimalPlaces;
if ((num%1)!==0){
return num.toString().split(".")[1].length;
}
else{
return 0;
}
}
function mergeChartConfig(defaults,userDefined){
var returnObj = {};
var attrname;
for (attrname in defaults) { returnObj[attrname] = defaults[attrname]; }
for (attrname in userDefined) { returnObj[attrname] = userDefined[attrname]; }
return returnObj;
}
/**
* Transforms the given number x, from the range i - I to the range o - O
* @param {number} i the lower based number in the i - I range.
* @param {number} x the number to transform
* @param {number} I the higher based number in the i - I range.
* @param {number} o the lower based number in the o - O range.
* @param {number} O the higher based number in the o - O range.
* @return {number} the transformed x number
*/
function affineTransform( i, x, I, o, O ){
return (((x - i)/(I - i)) * (O - o)) + o;
}
window.Chart = Chart;
Chart.prototype.constructor = Chart;
Chart.prototype = {};
Chart.prototype.clear = clear;
Chart.prototype.calculateScale = calculateScale;
Chart.prototype.calculateOffset = calculateOffset;
Chart.prototype.populateLabels = populateLabels;
Chart.prototype.animationLoop = animationLoop;
Chart.prototype.Max = Max;
Chart.prototype.Min = Min;
Chart.prototype.Default = Default;
Chart.prototype.isNumber = isNumber;
Chart.prototype.CapValue = CapValue;
Chart.prototype.getDecimalPlaces = getDecimalPlaces;
Chart.prototype.mergeChartConfig = mergeChartConfig;
Chart.prototype.affineTransform = affineTransform;
Chart.prototype.tmpl = tmpl;
Chart.prototype.defaults = {
scaleOverlay : true,
scaleOverride : false,
scaleSteps : null,
scaleStepWidth : null,
scaleStartValue : null,
scaleShowLine : true,
scaleLineColor : "rgba(0,0,0,.1)",
scaleLineWidth : 1,
scaleShowLabels : true,
scaleLabel : "<%=value%>",
scaleFontFamily : "'Arial'",
scaleFontSize : 12,
scaleFontStyle : "normal",
scaleFontColor : "#666",
scaleShowLabelBackdrop : true,
scaleBackdropColor : "rgba(255,255,255,0.75)",
scaleBackdropPaddingY : 2,
scaleBackdropPaddingX : 2,
scaleGridLineColor : "rgba(0,0,0,.05)",
scaleGridLineWidth : 1,
animation : true,
animationSteps : 100,
animationEasing : "easeOutBounce",
animateRotate : true,
animateScale : false,
onAnimationComplete : null
};
Chart.prototype.animationOptions = {
linear : function (t){
return t;
},
easeInQuad: function (t) {
return t*t;
},
easeOutQuad: function (t) {
return -1 *t*(t-2);
},
easeInOutQuad: function (t) {
t /= (1/2);
if ( t < 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) {
t /= (1/2);
if (t < 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) {
t /= (1/2);
if (t < 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) {
t /= (1/2);
if (t < 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;
t /= (1/2);
if (t < 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) {
t /= (1/2);
if (t < 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;
t /= 1;
if (t===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;
t/=1;
if (t===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;
t /= (1/2);
if (t===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;
t /= (1/2);
if (t < 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 - this.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 this.easeInBounce (t*2) * 0.5;
return this.easeOutBounce (t*2-1) * 0.5 + 1*0.5;
}
};
// shim layer with setTimeout fallback
var requestAnimFrame = (function(){
return window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function(callback) {
window.setTimeout(callback, 1000 / 60);
};
})();
function _createGraph(proto, data, options){
var config = (options)? mergeChartConfig( proto.defaultConfigs(), options ) : proto.defaultConfigs();
if( !data ){
data = this._data;
} else {
this._data = data;
}
return new proto( data, config, this._context );
}
function PolarArea(data,options){
// var config = (options)? mergeChartConfig(Chart.prototype.PolarArea.defaults,options) : Chart.prototype.PolarArea.defaults;
// if( !data ){
// data = this._data;
// } else {
// this._data = data;
// }
// return new PolarAreaChart(data,config,this._context);
return this._createGraph( PolarAreaChart, data, options );
}
function Radar(data, options){
// var config = (options)? mergeChartConfig(Chart.prototype.Radar.defaults,options) : Chart.prototype.Radar.defaults;
// if( !data ){
// data = this._data;
// } else {
// this._data = data;
// }
// return new RadarChart(data,config, this._context);
return this._createGraph( RadarChart, data, options );
}
function Pie(data,options){
// var config = (options)? mergeChartConfig(Chart.prototype.Pie.defaults,options) : Chart.prototype.Pie.defaults;
// if( !data ){
// data = this._data;
// } else {
// this._data = data;
// }
// return new PieChart(data,config, this._context);
return this._createGraph( PieChart, data, options );
}
function Doughnut(data,options){
// var config = (options) ? mergeChartConfig(Chart.prototype.Doughnut.defaults,options) : Chart.prototype.Doughnut.defaults;
// if( !data ){
// data = this._data;
// } else {
// this._data = data;
// }
// return new DoughnutChart(data,config,this._context);
return this._createGraph( DoughnutChart, data, options );
}
function Line(data,options){
// var config = (options) ? mergeChartConfig(Chart.prototype.Line.defaults,options) : Chart.prototype.Line.defaults;
// if( !data ){
// data = this._data;
// } else {
// this._data = data;
// }
// return new LineChart(data,config,this._context);
return this._createGraph( LineChart, data, options );
}
function Bar(data,options){
// var config = (options) ? mergeChartConfig(Chart.prototype.Bar.defaults,options) : Chart.prototype.Bar.defaults;
// if( !data ){
// data = this._data;
// } else {
// this._data = data;
// }
// return new BarChart(data,config,this._context);
return this._createGraph( BarChart, data, options );
}
function HBar(data,options){
// var config = (options) ? mergeChartConfig(Chart.prototype.HBar.defaults,options) : Chart.prototype.HBar.defaults;
// if( !data ){
// data = this._data;
// } else {
// this._data = data;
// }
// return new HBarChart(data,config,this._context);
return this._createGraph( HBarChart, data, options );
}
var _defaultConfigs = {
animation : true,
animationEasing : "easeOutQuart",
animationSteps : 60,
onAnimationComplete : null
};
function defaultConfigs(){
return _defaultConfigs;
}
Chart.defaultConfigs = defaultConfigs;
Chart.prototype._createGraph = _createGraph;
Chart.prototype.PolarArea = PolarArea;
Chart.prototype.Radar = Radar;
Chart.prototype.Doughnut = Doughnut;
Chart.prototype.Line = Line;
Chart.prototype.Bar = Bar;
Chart.prototype.HBar = HBar;
Chart.prototype.Pie = Pie;
})();
(function(){
function ChartGrid( data, config, ctx ){
if(!config || !data){
return;
}
Chart.call( this, ctx );
this._maxSize = undefined;
this._rotateLabels = undefined;
this._labelHeight = undefined;
this._scaleHeight = undefined;
this._xAxisLength = undefined;
this._valueHop = undefined;
this._barWidth = undefined;
this._yAxisPosX = undefined;
this._xAxisPosY = undefined;
this._config = config;
this._data = data;
for( var i = 0; i < this._data.datasets.length; i++ ){
for( var j = 0; j < this._data.datasets[i].data.length; j++ ){
this._data.datasets[i].data[j] = this._data.datasets[i].data[j] * 1;
}
if( this._data.datasets[i].fillColor === undefined && this._data.datasets[i].color === undefined ) {
this._data.datasets[i].color = Color.createColorBetweenThresholds( this._rand );
}
}
this.calculateDrawingSizes();
this._valueBounds = this.getValueBounds();
//Check and set the scale
this._labelTemplateString = (config.scaleShowLabels)? config.scaleLabel : "";
if (!config.scaleOverride){
this._calculatedScale = this.calculateScale(this._scaleHeight,this._valueBounds.maxSteps,this._valueBounds.minSteps,this._valueBounds.maxValue,this._valueBounds.minValue,this._labelTemplateString);
}
else {
this._calculatedScale = {
steps : config.scaleSteps,
stepValue : config.scaleStepWidth,
graphMin : config.scaleStartValue,
labels : []
};
this.populateLabels(this._labelTemplateString, this._calculatedScale.labels,this._calculatedScale.steps,config.scaleStartValue,config.scaleStepWidth);
}
this._scaleHop = Math.floor(this._scaleHeight/this._calculatedScale.steps);
this.calculateXAxisSize();
this.animationLoop(config,this.drawScale,this.drawGraph,ctx);
}
function drawGraph( number ){
return;
}
function calculateDrawingSizes(){
this._maxSize = this._height;
//Need to check the X axis first - measure the length of each text metric, and figure out if we need to rotate by 45 degrees.
this._context.font = this._config.scaleFontStyle + " " + this._config.scaleFontSize+"px " + this._config.scaleFontFamily;
widestXLabel = 1;
for (var i=0; i<this._data.labels.length; i++){
var textLength = this._context.measureText(this._data.labels[i]).width;
//If the text length is longer - make that equal to longest text!
widestXLabel = (textLength > widestXLabel)? textLength : widestXLabel;
}
if (this._width/this._data.labels.length < widestXLabel){
this._rotateLabels = 45;
if (this._width/this._data.labels.length < Math.cos(this._rotateLabels) * widestXLabel){
this._rotateLabels = 90;
this._maxSize -= widestXLabel;
}
else{
this._maxSize -= Math.sin(this._rotateLabels) * widestXLabel;
}
}
else{
this._maxSize -= this._config.scaleFontSize;
}
//Add a little padding between the x line and the text
this._maxSize -= 5;
this._labelHeight = this._config.scaleFontSize;
this._maxSize -= this._labelHeight;
//Set 5 pixels greater than the font size to allow for a little padding from the X axis.
this._scaleHeight = this._maxSize;
//Then get the area above we can safely draw on.
}
function getValueBounds() {
var upperValue = Number.MIN_VALUE;
var lowerValue = Number.MAX_VALUE;
for (var i=0; i<this._data.datasets.length; i++){
for (var j=0; j<this._data.datasets[i].data.length; j++){
if (this._data.datasets[i].data[j] > upperValue){ upperValue = this._data.datasets[i].data[j]; }
if (this._data.datasets[i].data[j] < lowerValue){ lowerValue = this._data.datasets[i].data[j]; }
}
}
var maxSteps = Math.floor((this._scaleHeight / (this._labelHeight*0.66)));
var minSteps = Math.floor((this._scaleHeight / this._labelHeight*0.5));
return {
maxValue : upperValue,
minValue : lowerValue,
maxSteps : maxSteps,
minSteps : minSteps
};
}
function calculateXAxisSize(){
var longestText = 1;
//if we are showing the labels
if (this._config.scaleShowLabels){
this._context.font = this._config.scaleFontStyle + " " + this._config.scaleFontSize+"px " + this._config.scaleFontFamily;
for (var i=0; i<this._calculatedScale.labels.length; i++){
var measuredText = this._context.measureText(this._calculatedScale.labels[i]).width;
longestText = (measuredText > longestText)? measuredText : longestText;
}
//Add a little extra padding from the y axis
longestText +=10;
}
this._xAxisLength = this._width - longestText - widestXLabel;
var extra = ( this instanceof LineChart ) ? 1 : 0;
this._valueHop = Math.floor(this._xAxisLength/(this._data.labels.length - extra));
this._barWidth = (this._valueHop - this._config.scaleGridLineWidth*2 - (this._config.barValueSpacing*2) - (this._config.barDatasetSpacing*this._data.datasets.length-1) - ((this._config.barStrokeWidth/2)*this._data.datasets.length-1))/this._data.datasets.length;
this._yAxisPosX = this._width-widestXLabel/2-this._xAxisLength;
this._xAxisPosY = this._scaleHeight + this._config.scaleFontSize/2;
}
var _defaultConfigs = {
// scaleShowLine : true,
scaleBackdropColor : "rgba(255,255,255,0.75)",
scaleBackdropPaddingX : 2,
scaleBackdropPaddingY : 2,
scaleFontColor : "#666",
scaleFontFamily : "'Arial'",
scaleFontSize : 12,
scaleFontStyle : "normal",
scaleGridLineColor : "rgba(0,0,0,.05)",
scaleGridLineWidth : 1,
scaleLabel : "<%=value%>",
scaleLineColor : "rgba(0,0,0,.1)",
scaleLineWidth : 1,
scaleOverlay : false,
scaleOverride : false,
scaleShowGridLines : true,
scaleShowLabelBackdrop : true,
scaleShowLabels : true,
scaleStartValue : null,
scaleSteps : null,
scaleStepWidth : null
};
function defaultConfigs(){
return Chart.prototype.mergeChartConfig( Chart.defaultConfigs(), _defaultConfigs );
}
window.ChartGrid = ChartGrid;
ChartGrid.prototype.constructor = ChartGrid;
ChartGrid.prototype = new Chart();
ChartGrid.prototype.calculateDrawingSizes = calculateDrawingSizes;
ChartGrid.prototype.getValueBounds = getValueBounds;
ChartGrid.prototype.calculateXAxisSize = calculateXAxisSize;
ChartGrid.prototype.drawGraph = drawGraph;
ChartGrid.defaultConfigs = defaultConfigs;
})();
(function(){
function PolarAreaChart(data,config,ctx){
this._maxSize = undefined;
this._scaleHop = undefined;
this._calculatedScale = undefined;
this._labelHeight = undefined;
this._scaleHeight = undefined;
this._valueBounds = undefined;
this._labelTemplateString = undefined;
this._config = config;
this._data = data;
if( data.datasets ){
this._graphData = data.datasets[0].data;
} else {
this._graphData = data;
}
var tempData = this._graphData;
this._rand = new RNG( 0xaece37 );
// data = this._graphData;
if( tempData && tempData.length && !isNaN( Number( tempData[0] ) ) ){
this._graphData = [];
for( i = 0; i < tempData.length; i++ ){
this._graphData.push( { value: tempData[i], color: Color.createColorBetweenThresholds( this._rand ) } );
}
}
// data = this._graphData;
ChartGrid.call( this, data, config, ctx );
// this.calculateDrawingSizes();
// this._valueBounds = this.getValueBounds();
// this._labelTemplateString = (config.scaleShowLabels)? config.scaleLabel : null;
// //Check and set the scale
// if (!config.scaleOverride){
// this._calculatedScale = this.calculateScale(this._scaleHeight,this._valueBounds.maxSteps,this._valueBounds.minSteps,this._valueBounds.maxValue,this._valueBounds.minValue,this._labelTemplateString);
// }
// else {
// this._calculatedScale = {
// steps : config.scaleSteps,
// stepValue : config.scaleStepWidth,
// graphMin : config.scaleStartValue,
// labels : []
// };
// populateLabels(this._labelTemplateString, this._calculatedScale.labels,this._calculatedScale.steps,config.scaleStartValue,config.scaleStepWidth);
// }
// this._scaleHop = this._maxSize/(this._calculatedScale.steps);
// //Wrap in an animation loop wrapper
// this.animationLoop(config,drawScale,drawAllSegments,ctx);
}
function calculateDrawingSizes(){
this._maxSize = (this.Min([this._width,this._height])/2);
//Remove whatever is larger - the font size or line width.
this._maxSize -= this.Max([this._config.scaleFontSize*0.5,this._config.scaleLineWidth*0.5]);
this._labelHeight = this._config.scaleFontSize*2;
//If we're drawing the backdrop - add the Y padding to the label height and remove from drawing region.
if (this._config.scaleShowLabelBackdrop){
this._labelHeight += (2 * this._config.scaleBackdropPaddingY);
this._maxSize -= this._config.scaleBackdropPaddingY*1.5;
}
this._scaleHeight = this._maxSize;
//If the label height is less than 5, set it to 5 so we don't have lines on top of each other.
this._labelHeight = this.Default(this._labelHeight,5);
}
function drawScale(){
for (var i=0; i<this._calculatedScale.steps; i++){
//If the line object is there
if (this._config.scaleShowLine){
this._context.beginPath();
this._context.arc(this._width/2, this._height/2, this._scaleHop * (i + 1), 0, (Math.PI * 2), true);
this._context.strokeStyle = this._config.scaleLineColor;
this._context.lineWidth = this._config.scaleLineWidth;
this._context.stroke();
}
if (this._config.scaleShowLabels){
this._context.textAlign = "center";
this._context.font = this._config.scaleFontStyle + " " + this._config.scaleFontSize + "px " + this._config.scaleFontFamily;
var label = this._calculatedScale.labels[i];
//If the backdrop object is within the font object
if (this._config.scaleShowLabelBackdrop){
var textWidth = this._context.measureText(label).width;
this._context.fillStyle = this._config.scaleBackdropColor;
this._context.beginPath();
this._context.rect(
Math.round(this._width/2 - textWidth/2 - this._config.scaleBackdropPaddingX), //X
Math.round(this._height/2 - (this._scaleHop * (i + 1)) - this._config.scaleFontSize*0.5 - this._config.scaleBackdropPaddingY),//Y
Math.round(textWidth + (this._config.scaleBackdropPaddingX*2)), //Width
Math.round(this._config.scaleFontSize + (this._config.scaleBackdropPaddingY*2)) //Height
);
this._context.fill();
}
this._context.textBaseline = "middle";
this._context.fillStyle = this._config.scaleFontColor;
this._context.fillText(label,this._width/2,this._height/2 - (this._scaleHop * (i + 1)));
}
}
}
function drawGraph( number ){
this.drawAllSegments( number );
}
function drawAllSegments(animationDecimal){
var startAngle = -Math.PI/2,
angleStep = (Math.PI*2)/this._graphData.length,
scaleAnimation = 1,
rotateAnimation = 1;
if (this._config.animation) {
if (this._config.animateScale) {
scaleAnimation = animationDecimal;
}
if (this._config.animateRotate){
rotateAnimation = animationDecimal;
}
}
for (var i=0; i<this._graphData.length; i++){
this._context.beginPath();
this._context.arc(this._width/2,this._height/2,scaleAnimation * this.calculateOffset(this._graphData[i].value,this._calculatedScale,this._scaleHop),startAngle, startAngle + rotateAnimation*angleStep, false);
this._context.lineTo(this._width/2,this._height/2);
this._context.closePath();
if( this._graphData[i].color ){
if( this._graphData[i].color instanceof Color ){
this._context.fillStyle = this._graphData[i].color.toString();
} else {
this._context.fillStyle = this._graphData[i].color;
}
}
this._context.fill();