3380 lines
104 KiB
Plaintext
3380 lines
104 KiB
Plaintext
/*!
|
|
* Chart.js
|
|
* http://chartjs.org/
|
|
* Version: 1.0.1-beta.4
|
|
*
|
|
* Copyright 2014 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 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,
|
|
|
|
// 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
|
|
helpers.cancelAnimFrame.call(root, 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);
|
|
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 (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
|
|
}).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
|
|
}).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 = 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;
|
|
|
|
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
|
|
//The three is to buffer form the very
|
|
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(){
|
|
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/(this.valuesCount - ((this.offsetGridLines) ? 0 : 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);
|
|
|
|
ctx.textAlign = "right";
|
|
ctx.textBaseline = "middle";
|
|
if (this.showLabels){
|
|
ctx.fillText(labelString,xStart - 10,yLabelCenter);
|
|
}
|
|
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);
|
|
|
|
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);
|
|
|
|
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;
|
|
}
|
|
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 - 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,
|
|
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 - Amount of animation steps
|
|
animationSteps : 100,
|
|
|
|
//String - Animation easing effect
|
|
animationEasing : "easeOutBounce",
|
|
|
|
//Boolean - Whether we animate the rotation of the Doughnut
|
|
animateRotate : true,
|
|
|
|
//Boolean - Whether we animate scaling the Doughnut from the centre
|
|
animateScale : false,
|
|
|
|
//String - A legend template
|
|
legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<segments.length; i++){%><li><span style=\"background-color:<%=segments[i].fillColor%>\"></span><%if(segments[i].label){%><%=segments[i].label%><%}%></li><%}%></ul>"
|
|
|
|
};
|
|
|
|
|
|
Chart.Type.extend({
|
|
//Passing in a name registers this chart in the Chart namespace
|
|
name: "Doughnut",
|
|
//Providing a defaults will also register the deafults in the chart namespace
|
|
defaults : defaultConfig,
|
|
//Initialize is fired when the chart is initialized - Data is passed in as a parameter
|
|
//Config is automatically merged by the core of Chart.js, and is available at this.options
|
|
initialize: function(data){
|
|
|
|
//Declare segments as a static property to prevent inheriting across the Chart type prototype
|
|
this.segments = [];
|
|
this.outerRadius = (helpers.min([this.chart.width,this.chart.height]) - this.options.segmentStrokeWidth/2)/2;
|
|
|
|
this.SegmentArc = Chart.Arc.extend({
|
|
ctx : this.chart.ctx,
|
|
x : this.chart.width/2,
|
|
y : this.chart.height/2
|
|
});
|
|
|
|
//Set up tooltip events on the chart
|
|
if (this.options.showTooltips){
|
|
helpers.bindEvents(this, this.options.tooltipEvents, function(evt){
|
|
var activeSegments = (evt.type !== 'mouseout') ? this.getSegmentsAtEvent(evt) : [];
|
|
|
|
helpers.each(this.segments,function(segment){
|
|
segment.restore(["fillColor"]);
|
|
});
|
|
helpers.each(activeSegments,function(activeSegment){
|
|
activeSegment.fillColor = activeSegment.highlightColor;
|
|
});
|
|
this.showTooltip(activeSegments);
|
|
});
|
|
}
|
|
this.calculateTotal(data);
|
|
|
|
helpers.each(data,function(datapoint, index){
|
|
this.addData(datapoint, index, true);
|
|
},this);
|
|
|
|
this.render();
|
|
},
|
|
getSegmentsAtEvent : function(e){
|
|
var segmentsArray = [];
|
|
|
|
var location = helpers.getRelativePosition(e);
|
|
|
|
helpers.each(this.segments,function(segment){
|
|
if (segment.inRange(location.x,location.y)) segmentsArray.push(segment);
|
|
},this);
|
|
return segmentsArray;
|
|
},
|
|
addData : function(segment, atIndex, silent){
|
|
var index = atIndex || this.segments.length;
|
|
this.segments.splice(index, 0, new this.SegmentArc({
|
|
value : segment.value,
|
|
outerRadius : (this.options.animateScale) ? 0 : this.outerRadius,
|
|
innerRadius : (this.options.animateScale) ? 0 : (this.outerRadius/100) * this.options.percentageInnerCutout,
|
|
fillColor : segment.color,
|
|
highlightColor : segment.highlight || segment.color,
|
|
showStroke : this.options.segmentShowStroke,
|
|
strokeWidth : this.options.segmentStrokeWidth,
|
|
strokeColor : this.options.segmentStrokeColor,
|
|
startAngle : Math.PI * 1.5,
|
|
circumference : (this.options.animateRotate) ? 0 : this.calculateCircumference(segment.value),
|
|
label : segment.label
|
|
}));
|
|
if (!silent){
|
|
this.reflow();
|
|
this.update();
|
|
}
|
|
},
|
|
calculateCircumference : function(value){
|
|
return (Math.PI*2)*(value / this.total);
|
|
},
|
|
calculateTotal : function(data){
|
|
this.total = 0;
|
|
helpers.each(data,function(segment){
|
|
this.total += segment.value;
|
|
},this);
|
|
},
|
|
update : function(){
|
|
this.calculateTotal(this.segments);
|
|
|
|
// Reset any highlight colours before updating.
|
|
helpers.each(this.activeElements, function(activeElement){
|
|
activeElement.restore(['fillColor']);
|
|
});
|
|
|
|
helpers.each(this.segments,function(segment){
|
|
segment.save();
|
|
});
|
|
this.render();
|
|
},
|
|
|
|
removeData: function(atIndex){
|
|
var indexToDelete = (helpers.isNumber(atIndex)) ? atIndex : this.segments.length-1;
|
|
this.segments.splice(indexToDelete, 1);
|
|
this.reflow();
|
|
this.update();
|
|
},
|
|
|
|
reflow : function(){
|
|
helpers.extend(this.SegmentArc.prototype,{
|
|
x : this.chart.width/2,
|
|
y : this.chart.height/2
|
|
});
|
|
this.outerRadius = (helpers.min([this.chart.width,this.chart.height]) - this.options.segmentStrokeWidth/2)/2;
|
|
helpers.each(this.segments, function(segment){
|
|
segment.update({
|
|
outerRadius : this.outerRadius,
|
|
innerRadius : (this.outerRadius/100) * this.options.percentageInnerCutout
|
|
});
|
|
}, this);
|
|
},
|
|
draw : function(easeDecimal){
|
|
var animDecimal = (easeDecimal) ? easeDecimal : 1;
|
|
this.clear();
|
|
helpers.each(this.segments,function(segment,index){
|
|
segment.transition({
|
|
circumference : this.calculateCircumference(segment.value),
|
|
outerRadius : this.outerRadius,
|
|
innerRadius : (this.outerRadius/100) * this.options.percentageInnerCutout
|
|
},animDecimal);
|
|
|
|
segment.endAngle = segment.startAngle + segment.circumference;
|
|
|
|
segment.draw();
|
|
if (index === 0){
|
|
segment.startAngle = Math.PI * 1.5;
|
|
}
|
|
//Check to see if it's the last segment, if not get the next and update the start angle
|
|
if (index < this.segments.length-1){
|
|
this.segments[index+1].startAngle = segment.endAngle;
|
|
}
|
|
},this);
|
|
|
|
}
|
|
});
|
|
|
|
Chart.types.Doughnut.extend({
|
|
name : "Pie",
|
|
defaults : helpers.merge(defaultConfig,{percentageInnerCutout : 0})
|
|
});
|
|
|
|
}).call(this);
|
|
(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 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,
|
|
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.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);
|