mirror of
https://github.com/chartjs/Chart.js.git
synced 2024-10-07 12:49:07 +02:00
768 lines
24 KiB
JavaScript
768 lines
24 KiB
JavaScript
(function() {
|
|
|
|
"use strict";
|
|
|
|
//Declare root variable - window in the browser, global on the server
|
|
var root = this,
|
|
previous = root.Chart;
|
|
|
|
//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, reverse) {
|
|
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;
|
|
if (reverse) {
|
|
for (i = loopable.length - 1; i >= 0; i--) {
|
|
callback.apply(self, [loopable[i], i].concat(additionalArgs));
|
|
}
|
|
} else {
|
|
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)) {
|
|
if (helpers.isArray(value)) {
|
|
objClone[key] = value.slice(0);
|
|
} else if (typeof value === 'object' && value !== null) {
|
|
objClone[key] = clone(value);
|
|
} else {
|
|
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;
|
|
},
|
|
// Need a special merge function to chart configs since they are now grouped
|
|
configMerge = helpers.configMerge = function(_base) {
|
|
var base = clone(_base);
|
|
helpers.each(Array.prototype.slice.call(arguments, 1), function(extension) {
|
|
helpers.each(extension, function(value, key) {
|
|
if (extension.hasOwnProperty(key)) {
|
|
if (key === 'scales') {
|
|
// Scale config merging is complex. Add out own function here for that
|
|
base[key] = helpers.scaleMerge(base.hasOwnProperty(key) ? base[key] : {}, value);
|
|
|
|
} else if (key === 'scale') {
|
|
// Used in polar area & radar charts since there is only one scale
|
|
base[key] = helpers.configMerge(base.hasOwnProperty(key) ? base[key] : {}, Chart.scaleService.getScaleDefaults(value.type), value);
|
|
} else if (base.hasOwnProperty(key) && helpers.isArray(base[key]) && helpers.isArray(value)) {
|
|
// In this case we have an array of objects replacing another array. Rather than doing a strict replace,
|
|
// merge. This allows easy scale option merging
|
|
var baseArray = base[key];
|
|
|
|
helpers.each(value, function(valueObj, index) {
|
|
|
|
if (index < baseArray.length) {
|
|
if (typeof baseArray[index] == 'object' && baseArray[index] !== null && typeof valueObj == 'object' && valueObj !== null) {
|
|
// Two objects are coming together. Do a merge of them.
|
|
baseArray[index] = helpers.configMerge(baseArray[index], valueObj);
|
|
} else {
|
|
// Just overwrite in this case since there is nothing to merge
|
|
baseArray[index] = valueObj;
|
|
}
|
|
} else {
|
|
baseArray.push(valueObj); // nothing to merge
|
|
}
|
|
});
|
|
|
|
} else if (base.hasOwnProperty(key) && typeof base[key] == "object" && base[key] !== null && typeof value == "object") {
|
|
// If we are overwriting an object with an object, do a merge of the properties.
|
|
base[key] = helpers.configMerge(base[key], value);
|
|
|
|
} else {
|
|
// can just overwrite the value in this case
|
|
base[key] = value;
|
|
}
|
|
}
|
|
});
|
|
});
|
|
|
|
return base;
|
|
},
|
|
scaleMerge = helpers.scaleMerge = function(_base, extension) {
|
|
var base = clone(_base);
|
|
|
|
helpers.each(extension, function(value, key) {
|
|
if (extension.hasOwnProperty(key)) {
|
|
if (key === 'xAxes' || key === 'yAxes') {
|
|
// These properties are arrays of items
|
|
if (base.hasOwnProperty(key)) {
|
|
helpers.each(value, function(valueObj, index) {
|
|
if (index >= base[key].length || !base[key][index].type) {
|
|
base[key].push(helpers.configMerge(valueObj.type ? Chart.scaleService.getScaleDefaults(valueObj.type) : {}, valueObj));
|
|
} else if (valueObj.type !== base[key][index].type) {
|
|
// Type changed. Bring in the new defaults before we bring in valueObj so that valueObj can override the correct scale defaults
|
|
base[key][index] = helpers.configMerge(base[key][index], valueObj.type ? Chart.scaleService.getScaleDefaults(valueObj.type) : {}, valueObj)
|
|
} else {
|
|
// Type is the same
|
|
base[key][index] = helpers.configMerge(base[key][index], valueObj);
|
|
}
|
|
});
|
|
} else {
|
|
base[key] = [];
|
|
helpers.each(value, function(valueObj) {
|
|
base[key].push(helpers.configMerge(valueObj.type ? Chart.scaleService.getScaleDefaults(valueObj.type) : {}, valueObj));
|
|
});
|
|
}
|
|
} else if (base.hasOwnProperty(key) && typeof base[key] == "object" && base[key] !== null && typeof value == "object") {
|
|
// If we are overwriting an object with an object, do a merge of the properties.
|
|
base[key] = helpers.configMerge(base[key], value);
|
|
|
|
} else {
|
|
// can just overwrite the value in this case
|
|
base[key] = value;
|
|
}
|
|
}
|
|
});
|
|
|
|
return base;
|
|
},
|
|
getValueAtIndexOrDefault = helpers.getValueAtIndexOrDefault = function(value, index, defaultValue) {
|
|
if (value === undefined || value === null) {
|
|
return defaultValue;
|
|
}
|
|
|
|
if (helpers.isArray(value)) {
|
|
return index < value.length ? value[index] : defaultValue;
|
|
}
|
|
|
|
return value;
|
|
},
|
|
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 === undefined || startIndex === null) {
|
|
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 === undefined || startIndex === null) {
|
|
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);
|
|
},
|
|
sign = helpers.sign = function(x) {
|
|
if (Math.sign) {
|
|
return Math.sign(x);
|
|
} else {
|
|
x = +x; // convert to a number
|
|
if (x === 0 || isNaN(x)) {
|
|
return x;
|
|
}
|
|
return x > 0 ? 1 : -1;
|
|
}
|
|
},
|
|
log10 = helpers.log10 = function(x) {
|
|
if (Math.log10) {
|
|
return Math.log10(x)
|
|
} else {
|
|
return Math.log(x) / Math.LN10;
|
|
}
|
|
},
|
|
getDecimalPlaces = helpers.getDecimalPlaces = function(num) {
|
|
if (num % 1 !== 0 && isNumber(num)) {
|
|
var s = num.toString();
|
|
if (s.indexOf("e-") < 0) {
|
|
// no exponent, e.g. 0.01
|
|
return s.split(".")[1].length;
|
|
} else if (s.indexOf(".") < 0) {
|
|
// no decimal point, e.g. 1e-9
|
|
return parseInt(s.split("e-")[1]);
|
|
} else {
|
|
// exponent and decimal point, e.g. 1.23e-9
|
|
var parts = s.split(".")[1].split("e-");
|
|
return parts[0].length + parseInt(parts[1]);
|
|
}
|
|
} else {
|
|
return 0;
|
|
}
|
|
},
|
|
toRadians = helpers.toRadians = function(degrees) {
|
|
return degrees * (Math.PI / 180);
|
|
},
|
|
toDegrees = helpers.toDegrees = function(radians) {
|
|
return radians * (180 / Math.PI);
|
|
},
|
|
// 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.atan2(distanceFromYCenter, distanceFromXCenter);
|
|
|
|
if (angle < (-0.5 * Math.PI)) {
|
|
angle += 2.0 * Math.PI; // make sure the returned angle is in the range of (-PI/2, 3PI/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 {
|
|
previous: {
|
|
x: MiddlePoint.x - fa * (AfterPoint.x - FirstPoint.x),
|
|
y: MiddlePoint.y - fa * (AfterPoint.y - FirstPoint.y)
|
|
},
|
|
next: {
|
|
x: MiddlePoint.x + fb * (AfterPoint.x - FirstPoint.x),
|
|
y: MiddlePoint.y + fb * (AfterPoint.y - FirstPoint.y)
|
|
}
|
|
};
|
|
},
|
|
nextItem = helpers.nextItem = function(collection, index, loop) {
|
|
if (loop) {
|
|
return index >= collection.length - 1 ? collection[0] : collection[index + 1];
|
|
}
|
|
|
|
return index >= collection.length - 1 ? collection[collection.length - 1] : collection[index + 1];
|
|
},
|
|
previousItem = helpers.previousItem = function(collection, index, loop) {
|
|
if (loop) {
|
|
return index <= 0 ? collection[collection.length - 1] : collection[index - 1];
|
|
}
|
|
return index <= 0 ? collection[0] : collection[index - 1];
|
|
},
|
|
// Implementation of the nice number algorithm used in determining where axis labels will go
|
|
niceNum = helpers.niceNum = function(range, round) {
|
|
var exponent = Math.floor(helpers.log10(range));
|
|
var fraction = range / Math.pow(10, exponent);
|
|
var niceFraction;
|
|
|
|
if (round) {
|
|
if (fraction < 1.5) {
|
|
niceFraction = 1;
|
|
} else if (fraction < 3) {
|
|
niceFraction = 2;
|
|
} else if (fraction < 7) {
|
|
niceFraction = 5;
|
|
} else {
|
|
niceFraction = 10;
|
|
}
|
|
} else {
|
|
if (fraction <= 1.0) {
|
|
niceFraction = 1;
|
|
} else if (fraction <= 2) {
|
|
niceFraction = 2;
|
|
} else if (fraction <= 5) {
|
|
niceFraction = 5;
|
|
} else {
|
|
niceFraction = 10;
|
|
}
|
|
}
|
|
|
|
return niceFraction * Math.pow(10, exponent);
|
|
},
|
|
/* 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/
|
|
templateStringCache = {},
|
|
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);
|
|
}
|
|
|
|
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;
|
|
|
|
if (templateStringCache.hasOwnProperty(str)) {
|
|
fn = templateStringCache[str];
|
|
} else {
|
|
// Generate a reusable function that will serve as a template
|
|
// generator (and which will be cached).
|
|
var functionCode = "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('');";
|
|
fn = new Function("obj", functionCode);
|
|
|
|
// Cache the result
|
|
templateStringCache[str] = fn;
|
|
}
|
|
|
|
// Provide some basic currying to the user
|
|
return data ? fn(data) : fn;
|
|
}
|
|
return tmpl(templateString, valuesObject);
|
|
},
|
|
/* jshint ignore:end */
|
|
//--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);
|
|
};
|
|
})(),
|
|
//-- 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,
|
|
padding = parseInt(getStyle(container, 'padding-left')) + parseInt(getStyle(container, 'padding-right'));
|
|
// TODO = check cross browser stuff with this.
|
|
return container.clientWidth - padding;
|
|
},
|
|
getMaximumHeight = helpers.getMaximumHeight = function(domNode) {
|
|
var container = domNode.parentNode,
|
|
padding = parseInt(getStyle(container, 'padding-bottom')) + parseInt(getStyle(container, 'padding-top'));
|
|
// TODO = check cross browser stuff with this.
|
|
return container.clientHeight - padding;
|
|
},
|
|
getStyle = helpers.getStyle = function(el, property) {
|
|
return el.currentStyle ?
|
|
el.currentStyle[property] :
|
|
document.defaultView.getComputedStyle(el, null).getPropertyValue(property);
|
|
},
|
|
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();
|
|
},
|
|
color = helpers.color = function(color) {
|
|
if (!window.Color) {
|
|
console.log('Color.js not found!');
|
|
return color;
|
|
}
|
|
return window.Color(color);
|
|
},
|
|
isArray = helpers.isArray = function(obj) {
|
|
if (!Array.isArray) {
|
|
return Object.prototype.toString.call(arg) === '[object Array]';
|
|
}
|
|
return Array.isArray(obj);
|
|
};
|
|
|
|
}).call(this);
|