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一个基于 Bootstrap 深度定制开源前端实践方案，帮助你快速构建现代跨屏应用。
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JavaScript
/* ========================================================================
* Chart.js: Chart.Core.js [Version: 1.0.2]
* http://chartjs.org/
*
* ZUI: The file has been changed in ZUI. It will not keep update with the
* official version in the future.
* http://zui.sexy
* ========================================================================
* Copyright 2015 Nick Downie, Released under the MIT license
* https://github.com/nnnick/Chart.js/blob/master/LICENSE.md
* ======================================================================== */
/*!
* Chart.js 1.0.2
* Copyright 2015 Nick Downie
* Released under the MIT license
* http://chartjs.org/
*/
/// ----- ZUI change begin -----
/// Add jquery object to namespace
/// (function(){ // Old code
(function($) {
/// ----- ZUI change end -----
"use strict";
//Declare root variable - window in the browser, global on the server
/// ----- ZUI change begin -----
/// Change root to zui shared object
///
/// var root = this, // old code
var root = $ && $.zui ? $.zui : this,
/// ----- ZUI change end -----
previous = root.Chart;
//Occupy the global variable of Chart, and create a simple base class
var Chart = function(context) {
var chart = this;
this.canvas = context.canvas;
this.ctx = context;
//Variables global to the chart
var computeDimension = function(element, dimension) {
if(element['offset' + dimension]) {
return element['offset' + dimension];
} else {
return document.defaultView.getComputedStyle(element).getPropertyValue(dimension);
}
}
var width = this.width = computeDimension(context.canvas, 'Width');
var height = this.height = computeDimension(context.canvas, 'Height');
// Firefox requires this to work correctly
context.canvas.width = width;
context.canvas.height = height;
var width = this.width = context.canvas.width;
var height = this.height = context.canvas.height;
this.aspectRatio = this.width / this.height;
//High pixel density displays - multiply the size of the canvas height/width by the device pixel ratio, then scale.
helpers.retinaScale(this);
return this;
};
//Globally expose the defaults to allow for user updating/changing
Chart.defaults = {
global: {
// Boolean - Whether to animate the chart
animation: true,
// Number - Number of animation steps
animationSteps: 60,
// String - Animation easing effect
// Possible effects are:
// [easeInOutQuart, linear, easeOutBounce, easeInBack, easeInOutQuad,
// easeOutQuart, easeOutQuad, easeInOutBounce, easeOutSine, easeInOutCubic,
// easeInExpo, easeInOutBack, easeInCirc, easeInOutElastic, easeOutBack,
// easeInQuad, easeInOutExpo, easeInQuart, easeOutQuint, easeInOutCirc,
// easeInSine, easeOutExpo, easeOutCirc, easeOutCubic, easeInQuint,
// easeInElastic, easeInOutSine, easeInOutQuint, easeInBounce,
// easeOutElastic, easeInCubic]
animationEasing: "easeOutQuart",
// Boolean - If we should show the scale at all
showScale: true,
// Boolean - If we want to override with a hard coded scale
scaleOverride: false,
// ** Required if scaleOverride is true **
// Number - The number of steps in a hard coded scale
scaleSteps: null,
// Number - The value jump in the hard coded scale
scaleStepWidth: null,
// Number - The scale starting value
scaleStartValue: null,
// String - Colour of the scale line
scaleLineColor: "rgba(0,0,0,.1)",
// Number - Pixel width of the scale line
scaleLineWidth: 1,
// Boolean - Whether to show labels on the scale
scaleShowLabels: true,
// Interpolated JS string - can access value
scaleLabel: "<%=value%>",
// Boolean - Whether the scale should stick to integers, and not show any floats even if drawing space is there
scaleIntegersOnly: true,
// Boolean - Whether the scale should start at zero, or an order of magnitude down from the lowest value
scaleBeginAtZero: false,
// String - Scale label font declaration for the scale label
scaleFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",
// Number - Scale label font size in pixels
scaleFontSize: 12,
// String - Scale label font weight style
scaleFontStyle: "normal",
// String - Scale label font colour
scaleFontColor: "#666",
// Boolean - whether or not the chart should be responsive and resize when the browser does.
responsive: false,
// Boolean - whether to maintain the starting aspect ratio or not when responsive, if set to false, will take up entire container
maintainAspectRatio: true,
// Boolean - Determines whether to draw tooltips on the canvas or not - attaches events to touchmove & mousemove
showTooltips: true,
// Boolean - Determines whether to draw built-in tooltip or call custom tooltip function
customTooltips: false,
// Array - Array of string names to attach tooltip events
tooltipEvents: ["mousemove", "touchstart", "touchmove", "mouseout"],
// String - Tooltip background colour
tooltipFillColor: "rgba(0,0,0,0.8)",
// String - Tooltip label font declaration for the scale label
tooltipFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",
// Number - Tooltip label font size in pixels
tooltipFontSize: 14,
// String - Tooltip font weight style
tooltipFontStyle: "normal",
// String - Tooltip label font colour
tooltipFontColor: "#fff",
// String - Tooltip title font declaration for the scale label
tooltipTitleFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",
// Number - Tooltip title font size in pixels
tooltipTitleFontSize: 14,
// String - Tooltip title font weight style
tooltipTitleFontStyle: "bold",
// String - Tooltip title font colour
tooltipTitleFontColor: "#fff",
// Number - pixel width of padding around tooltip text
tooltipYPadding: 6,
// Number - pixel width of padding around tooltip text
tooltipXPadding: 6,
// Number - Size of the caret on the tooltip
tooltipCaretSize: 8,
// Number - Pixel radius of the tooltip border
tooltipCornerRadius: 6,
// Number - Pixel offset from point x to tooltip edge
tooltipXOffset: 10,
// String - Template string for single tooltips
tooltipTemplate: "<%if (label){%><%=label%>: <%}%><%= value %>",
// String - Template string for single tooltips
multiTooltipTemplate: "<%if (datasetLabel){%><%=datasetLabel%>: <%}%><%= value %>",
// String - Template string for multiple tooltip title
multiTooltipTitleTemplate: '<%= label %>',
// String - Colour behind the legend colour block
multiTooltipKeyBackground: '#fff',
// Function - Will fire on animation progression.
onAnimationProgress: function() {},
// Function - Will fire on animation completion.
onAnimationComplete: function() {}
}
};
//Create a dictionary of chart types, to allow for extension of existing types
Chart.types = {};
//Global Chart helpers object for utility methods and classes
var helpers = Chart.helpers = {};
//-- Basic js utility methods
var each = helpers.each = function(loopable, callback, self) {
var additionalArgs = Array.prototype.slice.call(arguments, 3);
// Check to see if null or undefined firstly.
if(loopable) {
if(loopable.length === +loopable.length) {
var i;
for(i = 0; i < loopable.length; i++) {
callback.apply(self, [loopable[i], i].concat(additionalArgs));
}
} else {
for(var item in loopable) {
callback.apply(self, [loopable[item], item].concat(additionalArgs));
}
}
}
},
clone = helpers.clone = function(obj) {
var objClone = {};
each(obj, function(value, key) {
if(obj.hasOwnProperty(key)) objClone[key] = value;
});
return objClone;
},
extend = helpers.extend = function(base) {
each(Array.prototype.slice.call(arguments, 1), function(extensionObject) {
each(extensionObject, function(value, key) {
if(extensionObject.hasOwnProperty(key)) base[key] = value;
});
});
return base;
},
merge = helpers.merge = function(base, master) {
//Merge properties in left object over to a shallow clone of object right.
var args = Array.prototype.slice.call(arguments, 0);
args.unshift({});
return extend.apply(null, args);
},
indexOf = helpers.indexOf = function(arrayToSearch, item) {
if(Array.prototype.indexOf) {
return arrayToSearch.indexOf(item);
} else {
for(var i = 0; i < arrayToSearch.length; i++) {
if(arrayToSearch[i] === item) return i;
}
return -1;
}
},
where = helpers.where = function(collection, filterCallback) {
var filtered = [];
helpers.each(collection, function(item) {
if(filterCallback(item)) {
filtered.push(item);
}
});
return filtered;
},
findNextWhere = helpers.findNextWhere = function(arrayToSearch, filterCallback, startIndex) {
// Default to start of the array
if(!startIndex) {
startIndex = -1;
}
for(var i = startIndex + 1; i < arrayToSearch.length; i++) {
var currentItem = arrayToSearch[i];
if(filterCallback(currentItem)) {
return currentItem;
}
}
},
findPreviousWhere = helpers.findPreviousWhere = function(arrayToSearch, filterCallback, startIndex) {
// Default to end of the array
if(!startIndex) {
startIndex = arrayToSearch.length;
}
for(var i = startIndex - 1; i >= 0; i--) {
var currentItem = arrayToSearch[i];
if(filterCallback(currentItem)) {
return currentItem;
}
}
},
inherits = helpers.inherits = function(extensions) {
//Basic javascript inheritance based on the model created in Backbone.js
var parent = this;
var ChartElement = (extensions && extensions.hasOwnProperty("constructor")) ? extensions.constructor : function() {
return parent.apply(this, arguments);
};
var Surrogate = function() {
this.constructor = ChartElement;
};
Surrogate.prototype = parent.prototype;
ChartElement.prototype = new Surrogate();
ChartElement.extend = inherits;
if(extensions) extend(ChartElement.prototype, extensions);
ChartElement.__super__ = parent.prototype;
return ChartElement;
},
noop = helpers.noop = function() {},
uid = helpers.uid = (function() {
var id = 0;
return function() {
return "chart-" + id++;
};
})(),
warn = helpers.warn = function(str) {
//Method for warning of errors
if(window.console && typeof window.console.warn == "function") console.warn(str);
},
amd = helpers.amd = (typeof define == 'function' && define.amd),
//-- Math methods
isNumber = helpers.isNumber = function(n) {
return !isNaN(parseFloat(n)) && isFinite(n);
},
max = helpers.max = function(array) {
return Math.max.apply(Math, array);
},
min = helpers.min = function(array) {
return Math.min.apply(Math, array);
},
cap = helpers.cap = function(valueToCap, maxValue, minValue) {
if(isNumber(maxValue)) {
if(valueToCap > maxValue) {
return maxValue;
}
} else if(isNumber(minValue)) {
if(valueToCap < minValue) {
return minValue;
}
}
return valueToCap;
},
getDecimalPlaces = helpers.getDecimalPlaces = function(num) {
if(num % 1 !== 0 && isNumber(num)) {
return num.toString().split(".")[1].length;
} else {
return 0;
}
},
toRadians = helpers.radians = function(degrees) {
return degrees * (Math.PI / 180);
},
// Gets the angle from vertical upright to the point about a centre.
getAngleFromPoint = helpers.getAngleFromPoint = function(centrePoint, anglePoint) {
var distanceFromXCenter = anglePoint.x - centrePoint.x,
distanceFromYCenter = anglePoint.y - centrePoint.y,
radialDistanceFromCenter = Math.sqrt(distanceFromXCenter * distanceFromXCenter + distanceFromYCenter * distanceFromYCenter);
var angle = Math.PI * 2 + Math.atan2(distanceFromYCenter, distanceFromXCenter);
//If the segment is in the top left quadrant, we need to add another rotation to the angle
if(distanceFromXCenter < 0 && distanceFromYCenter < 0) {
angle += Math.PI * 2;
}
return {
angle: angle,
distance: radialDistanceFromCenter
};
},
aliasPixel = helpers.aliasPixel = function(pixelWidth) {
return(pixelWidth % 2 === 0) ? 0 : 0.5;
},
splineCurve = helpers.splineCurve = function(FirstPoint, MiddlePoint, AfterPoint, t) {
//Props to Rob Spencer at scaled innovation for his post on splining between points
//http://scaledinnovation.com/analytics/splines/aboutSplines.html
var d01 = Math.sqrt(Math.pow(MiddlePoint.x - FirstPoint.x, 2) + Math.pow(MiddlePoint.y - FirstPoint.y, 2)),
d12 = Math.sqrt(Math.pow(AfterPoint.x - MiddlePoint.x, 2) + Math.pow(AfterPoint.y - MiddlePoint.y, 2)),
fa = t * d01 / (d01 + d12), // scaling factor for triangle Ta
fb = t * d12 / (d01 + d12);
return {
inner: {
x: MiddlePoint.x - fa * (AfterPoint.x - FirstPoint.x),
y: MiddlePoint.y - fa * (AfterPoint.y - FirstPoint.y)
},
outer: {
x: MiddlePoint.x + fb * (AfterPoint.x - FirstPoint.x),
y: MiddlePoint.y + fb * (AfterPoint.y - FirstPoint.y)
}
};
},
calculateOrderOfMagnitude = helpers.calculateOrderOfMagnitude = function(val) {
return Math.floor(Math.log(val) / Math.LN10);
},
calculateScaleRange = helpers.calculateScaleRange = function(valuesArray, drawingSize, textSize, startFromZero, integersOnly) {
//Set a minimum step of two - a point at the top of the graph, and a point at the base
var minSteps = 2,
maxSteps = Math.floor(drawingSize / (textSize * 1.5)),
skipFitting = (minSteps >= maxSteps);
var maxValue = max(valuesArray),
minValue = min(valuesArray);
// We need some degree of seperation here to calculate the scales if all the values are the same
// Adding/minusing 0.5 will give us a range of 1.
if(maxValue === minValue) {
maxValue += 0.5;
// So we don't end up with a graph with a negative start value if we've said always start from zero
if(minValue >= 0.5 && !startFromZero) {
minValue -= 0.5;
} else {
// Make up a whole number above the values
maxValue += 0.5;
}
}
var valueRange = Math.abs(maxValue - minValue),
rangeOrderOfMagnitude = calculateOrderOfMagnitude(valueRange),
graphMax = Math.ceil(maxValue / (1 * Math.pow(10, rangeOrderOfMagnitude))) * Math.pow(10, rangeOrderOfMagnitude),
graphMin = (startFromZero) ? 0 : Math.floor(minValue / (1 * Math.pow(10, rangeOrderOfMagnitude))) * Math.pow(10, rangeOrderOfMagnitude),
graphRange = graphMax - graphMin,
stepValue = Math.pow(10, rangeOrderOfMagnitude),
numberOfSteps = Math.round(graphRange / stepValue);
//If we have more space on the graph we'll use it to give more definition to the data
while((numberOfSteps > maxSteps || (numberOfSteps * 2) < maxSteps) && !skipFitting) {
if(numberOfSteps > maxSteps) {
stepValue *= 2;
numberOfSteps = Math.round(graphRange / stepValue);
// Don't ever deal with a decimal number of steps - cancel fitting and just use the minimum number of steps.
if(numberOfSteps % 1 !== 0) {
skipFitting = true;
}
}
//We can fit in double the amount of scale points on the scale
else {
//If user has declared ints only, and the step value isn't a decimal
if(integersOnly && rangeOrderOfMagnitude >= 0) {
//If the user has said integers only, we need to check that making the scale more granular wouldn't make it a float
if(stepValue / 2 % 1 === 0) {
stepValue /= 2;
numberOfSteps = Math.round(graphRange / stepValue);
}
//If it would make it a float break out of the loop
else {
break;
}
}
//If the scale doesn't have to be an int, make the scale more granular anyway.
else {
stepValue /= 2;
numberOfSteps = Math.round(graphRange / stepValue);
}
}
}
if(skipFitting) {
numberOfSteps = minSteps;
stepValue = graphRange / numberOfSteps;
}
return {
steps: numberOfSteps,
stepValue: stepValue,
min: graphMin,
max: graphMin + (numberOfSteps * stepValue)
};
},
/* jshint ignore:start */
// Blows up jshint errors based on the new Function constructor
//Templating methods
//Javascript micro templating by John Resig - source at http://ejohn.org/blog/javascript-micro-templating/
template = helpers.template = function(templateString, valuesObject) {
// If templateString is function rather than string-template - call the function for valuesObject
if(templateString instanceof Function) {
return templateString(valuesObject);
}
var cache = {};
function tmpl(str, data) {
// Figure out if we're getting a template, or if we need to
// load the template - and be sure to cache the result.
var fn = !/\W/.test(str) ?
cache[str] = cache[str] :
// Generate a reusable function that will serve as a template
// generator (and which will be cached).
new Function("obj",
"var p=[],print=function(){p.push.apply(p,arguments);};" +
// Introduce the data as local variables using with(){}
"with(obj){p.push('" +
// Convert the template into pure JavaScript
str
.replace(/[\r\t\n]/g, " ")
.split("<%").join("\t")
.replace(/((^|%>)[^\t]*)'/g, "$1\r")
.replace(/\t=(.*?)%>/g, "',$1,'")
.split("\t").join("');")
.split("%>").join("p.push('")
.split("\r").join("\\'") +
"');}return p.join('');"
);
// Provide some basic currying to the user
return data ? fn(data) : fn;
}
return tmpl(templateString, valuesObject);
},
/* jshint ignore:end */
generateLabels = helpers.generateLabels = function(templateString, numberOfSteps, graphMin, stepValue) {
var labelsArray = new Array(numberOfSteps);
if(labelTemplateString) {
each(labelsArray, function(val, index) {
labelsArray[index] = template(templateString, {
value: (graphMin + (stepValue * (index + 1)))
});
});
}
return labelsArray;
},
//--Animation methods
//Easing functions adapted from Robert Penner's easing equations
//http://www.robertpenner.com/easing/
easingEffects = helpers.easingEffects = {
linear: function(t) {
return t;
},
easeInQuad: function(t) {
return t * t;
},
easeOutQuad: function(t) {
return -1 * t * (t - 2);
},
easeInOutQuad: function(t) {
if((t /= 1 / 2) < 1) return 1 / 2 * t * t;
return -1 / 2 * ((--t) * (t - 2) - 1);
},
easeInCubic: function(t) {
return t * t * t;
},
easeOutCubic: function(t) {
return 1 * ((t = t / 1 - 1) * t * t + 1);
},
easeInOutCubic: function(t) {
if((t /= 1 / 2) < 1) return 1 / 2 * t * t * t;
return 1 / 2 * ((t -= 2) * t * t + 2);
},
easeInQuart: function(t) {
return t * t * t * t;
},
easeOutQuart: function(t) {
return -1 * ((t = t / 1 - 1) * t * t * t - 1);
},
easeInOutQuart: function(t) {
if((t /= 1 / 2) < 1) return 1 / 2 * t * t * t * t;
return -1 / 2 * ((t -= 2) * t * t * t - 2);
},
easeInQuint: function(t) {
return 1 * (t /= 1) * t * t * t * t;
},
easeOutQuint: function(t) {
return 1 * ((t = t / 1 - 1) * t * t * t * t + 1);
},
easeInOutQuint: function(t) {
if((t /= 1 / 2) < 1) return 1 / 2 * t * t * t * t * t;
return 1 / 2 * ((t -= 2) * t * t * t * t + 2);
},
easeInSine: function(t) {
return -1 * Math.cos(t / 1 * (Math.PI / 2)) + 1;
},
easeOutSine: function(t) {
return 1 * Math.sin(t / 1 * (Math.PI / 2));
},
easeInOutSine: function(t) {
return -1 / 2 * (Math.cos(Math.PI * t / 1) - 1);
},
easeInExpo: function(t) {
return(t === 0) ? 1 : 1 * Math.pow(2, 10 * (t / 1 - 1));
},
easeOutExpo: function(t) {
return(t === 1) ? 1 : 1 * (-Math.pow(2, -10 * t / 1) + 1);
},
easeInOutExpo: function(t) {
if(t === 0) return 0;
if(t === 1) return 1;
if((t /= 1 / 2) < 1) return 1 / 2 * Math.pow(2, 10 * (t - 1));
return 1 / 2 * (-Math.pow(2, -10 * --t) + 2);
},
easeInCirc: function(t) {
if(t >= 1) return t;
return -1 * (Math.sqrt(1 - (t /= 1) * t) - 1);
},
easeOutCirc: function(t) {
return 1 * Math.sqrt(1 - (t = t / 1 - 1) * t);
},
easeInOutCirc: function(t) {
if((t /= 1 / 2) < 1) return -1 / 2 * (Math.sqrt(1 - t * t) - 1);
return 1 / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1);
},
easeInElastic: function(t) {
var s = 1.70158;
var p = 0;
var a = 1;
if(t === 0) return 0;
if((t /= 1) == 1) return 1;
if(!p) p = 1 * 0.3;
if(a < Math.abs(1)) {
a = 1;
s = p / 4;
} else s = p / (2 * Math.PI) * Math.asin(1 / a);
return -(a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p));
},
easeOutElastic: function(t) {
var s = 1.70158;
var p = 0;
var a = 1;
if(t === 0) return 0;
if((t /= 1) == 1) return 1;
if(!p) p = 1 * 0.3;
if(a < Math.abs(1)) {
a = 1;
s = p / 4;
} else s = p / (2 * Math.PI) * Math.asin(1 / a);
return a * Math.pow(2, -10 * t) * Math.sin((t * 1 - s) * (2 * Math.PI) / p) + 1;
},
easeInOutElastic: function(t) {
var s = 1.70158;
var p = 0;
var a = 1;
if(t === 0) return 0;
if((t /= 1 / 2) == 2) return 1;
if(!p) p = 1 * (0.3 * 1.5);
if(a < Math.abs(1)) {
a = 1;
s = p / 4;
} else s = p / (2 * Math.PI) * Math.asin(1 / a);
if(t < 1) return -0.5 * (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p));
return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p) * 0.5 + 1;
},
easeInBack: function(t) {
var s = 1.70158;
return 1 * (t /= 1) * t * ((s + 1) * t - s);
},
easeOutBack: function(t) {
var s = 1.70158;
return 1 * ((t = t / 1 - 1) * t * ((s + 1) * t + s) + 1);
},
easeInOutBack: function(t) {
var s = 1.70158;
if((t /= 1 / 2) < 1) return 1 / 2 * (t * t * (((s *= (1.525)) + 1) * t - s));
return 1 / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2);
},
easeInBounce: function(t) {
return 1 - easingEffects.easeOutBounce(1 - t);
},
easeOutBounce: function(t) {
if((t /= 1) < (1 / 2.75)) {
return 1 * (7.5625 * t * t);
} else if(t < (2 / 2.75)) {
return 1 * (7.5625 * (t -= (1.5 / 2.75)) * t + 0.75);
} else if(t < (2.5 / 2.75)) {
return 1 * (7.5625 * (t -= (2.25 / 2.75)) * t + 0.9375);
} else {
return 1 * (7.5625 * (t -= (2.625 / 2.75)) * t + 0.984375);
}
},
easeInOutBounce: function(t) {
if(t < 1 / 2) return easingEffects.easeInBounce(t * 2) * 0.5;
return easingEffects.easeOutBounce(t * 2 - 1) * 0.5 + 1 * 0.5;
}
},
//Request animation polyfill - http://www.paulirish.com/2011/requestanimationframe-for-smart-animating/
requestAnimFrame = helpers.requestAnimFrame = (function() {
return window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function(callback) {
return window.setTimeout(callback, 1000 / 60);
};
})(),
cancelAnimFrame = helpers.cancelAnimFrame = (function() {
return window.cancelAnimationFrame ||
window.webkitCancelAnimationFrame ||
window.mozCancelAnimationFrame ||
window.oCancelAnimationFrame ||
window.msCancelAnimationFrame ||
function(callback) {
return window.clearTimeout(callback, 1000 / 60);
};
})(),
animationLoop = helpers.animationLoop = function(callback, totalSteps, easingString, onProgress, onComplete, chartInstance) {
var currentStep = 0,
easingFunction = easingEffects[easingString] || easingEffects.linear;
var animationFrame = function() {
currentStep++;
var stepDecimal = currentStep / totalSteps;
var easeDecimal = easingFunction(stepDecimal);
callback.call(chartInstance, easeDecimal, stepDecimal, currentStep);
onProgress.call(chartInstance, easeDecimal, stepDecimal);
if(currentStep < totalSteps) {
chartInstance.animationFrame = requestAnimFrame(animationFrame);
} else {
onComplete.apply(chartInstance);
}
};
requestAnimFrame(animationFrame);
},
//-- DOM methods
getRelativePosition = helpers.getRelativePosition = function(evt) {
var mouseX, mouseY;
var e = evt.originalEvent || evt,
canvas = evt.currentTarget || evt.srcElement,
boundingRect = canvas.getBoundingClientRect();
if(e.touches) {
mouseX = e.touches[0].clientX - boundingRect.left;
mouseY = e.touches[0].clientY - boundingRect.top;
} else {
mouseX = e.clientX - boundingRect.left;
mouseY = e.clientY - boundingRect.top;
}
return {
x: mouseX,
y: mouseY
};
},
addEvent = helpers.addEvent = function(node, eventType, method) {
if(node.addEventListener) {
node.addEventListener(eventType, method);
} else if(node.attachEvent) {
node.attachEvent("on" + eventType, method);
} else {
node["on" + eventType] = method;
}
},
removeEvent = helpers.removeEvent = function(node, eventType, handler) {
if(node.removeEventListener) {
node.removeEventListener(eventType, handler, false);
} else if(node.detachEvent) {
node.detachEvent("on" + eventType, handler);
} else {
node["on" + eventType] = noop;
}
},
bindEvents = helpers.bindEvents = function(chartInstance, arrayOfEvents, handler) {
// Create the events object if it's not already present
if(!chartInstance.events) chartInstance.events = {};
each(arrayOfEvents, function(eventName) {
chartInstance.events[eventName] = function() {
handler.apply(chartInstance, arguments);
};
addEvent(chartInstance.chart.canvas, eventName, chartInstance.events[eventName]);
});
},
unbindEvents = helpers.unbindEvents = function(chartInstance, arrayOfEvents) {
each(arrayOfEvents, function(handler, eventName) {
removeEvent(chartInstance.chart.canvas, eventName, handler);
});
},
getMaximumWidth = helpers.getMaximumWidth = function(domNode) {
var container = domNode.parentNode;
// TODO = check cross browser stuff with this.
return container.clientWidth;
},
getMaximumHeight = helpers.getMaximumHeight = function(domNode) {
var container = domNode.parentNode;
// TODO = check cross browser stuff with this.
return container.clientHeight;
},
getMaximumSize = helpers.getMaximumSize = helpers.getMaximumWidth, // legacy support
retinaScale = helpers.retinaScale = function(chart) {
var ctx = chart.ctx,
width = chart.canvas.width,
height = chart.canvas.height;
if(window.devicePixelRatio) {
ctx.canvas.style.width = width + "px";
ctx.canvas.style.height = height + "px";
ctx.canvas.height = height * window.devicePixelRatio;
ctx.canvas.width = width * window.devicePixelRatio;
ctx.scale(window.devicePixelRatio, window.devicePixelRatio);
}
},
//-- Canvas methods
clear = helpers.clear = function(chart) {
chart.ctx.clearRect(0, 0, chart.width, chart.height);
},
fontString = helpers.fontString = function(pixelSize, fontStyle, fontFamily) {
return fontStyle + " " + pixelSize + "px " + fontFamily;
},
longestText = helpers.longestText = function(ctx, font, arrayOfStrings) {
ctx.font = font;
var longest = 0;
each(arrayOfStrings, function(string) {
var textWidth = ctx.measureText(string).width;
longest = (textWidth > longest) ? textWidth : longest;
});
return longest;
},
drawRoundedRectangle = helpers.drawRoundedRectangle = function(ctx, x, y, width, height, radius) {
ctx.beginPath();
ctx.moveTo(x + radius, y);
ctx.lineTo(x + width - radius, y);
ctx.quadraticCurveTo(x + width, y, x + width, y + radius);
ctx.lineTo(x + width, y + height - radius);
ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);
ctx.lineTo(x + radius, y + height);
ctx.quadraticCurveTo(x, y + height, x, y + height - radius);
ctx.lineTo(x, y + radius);
ctx.quadraticCurveTo(x, y, x + radius, y);
ctx.closePath();
};
//Store a reference to each instance - allowing us to globally resize chart instances on window resize.
//Destroy method on the chart will remove the instance of the chart from this reference.
Chart.instances = {};
Chart.Type = function(data, options, chart) {
this.options = options;
this.chart = chart;
this.id = uid();
//Add the chart instance to the global namespace
Chart.instances[this.id] = this;
// Initialize is always called when a chart type is created
// By default it is a no op, but it should be extended
if(options.responsive) {
this.resize();
}
this.initialize.call(this, data);
};
//Core methods that'll be a part of every chart type
extend(Chart.Type.prototype, {
initialize: function() {
return this;
},
clear: function() {
clear(this.chart);
return this;
},
stop: function() {
// Stops any current animation loop occuring
cancelAnimFrame(this.animationFrame);
return this;
},
resize: function(callback) {
this.stop();
var canvas = this.chart.canvas,
newWidth = getMaximumWidth(this.chart.canvas),
newHeight = this.options.maintainAspectRatio ? newWidth / this.chart.aspectRatio : getMaximumHeight(this.chart.canvas);
canvas.width = this.chart.width = newWidth;
canvas.height = this.chart.height = newHeight;
retinaScale(this.chart);
if(typeof callback === "function") {
callback.apply(this, Array.prototype.slice.call(arguments, 1));
}
return this;
},
reflow: noop,
render: function(reflow) {
if(reflow) {
this.reflow();
}
if(this.options.animation && !reflow) {
helpers.animationLoop(
this.draw,
this.options.animationSteps,
this.options.animationEasing,
this.options.onAnimationProgress,
this.options.onAnimationComplete,
this
);
} else {
this.draw();
this.options.onAnimationComplete.call(this);
}
return this;
},
generateLegend: function() {
return template(this.options.legendTemplate, this);
},
destroy: function() {
this.clear();
unbindEvents(this, this.events);
var canvas = this.chart.canvas;
// Reset canvas height/width attributes starts a fresh with the canvas context
canvas.width = this.chart.width;
canvas.height = this.chart.height;
// < IE9 doesn't support removeProperty
if(canvas.style.removeProperty) {
canvas.style.removeProperty('width');
canvas.style.removeProperty('height');
} else {
canvas.style.removeAttribute('width');
canvas.style.removeAttribute('height');
}
delete Chart.instances[this.id];
},
showTooltip: function(ChartElements, forceRedraw) {
// Only redraw the chart if we've actually changed what we're hovering on.
if(typeof this.activeElements === 'undefined') this.activeElements = [];
var isChanged = (function(Elements) {
var changed = false;
if(Elements.length !== this.activeElements.length) {
changed = true;
return changed;
}
each(Elements, function(element, index) {
if(element !== this.activeElements[index]) {
changed = true;
}
}, this);
return changed;
}).call(this, ChartElements);
if(!isChanged && !forceRedraw) {
return;
} else {
this.activeElements = ChartElements;
}
this.draw();
if(this.options.customTooltips) {
this.options.customTooltips(false);
}
if(ChartElements.length > 0) {
// If we have multiple datasets, show a MultiTooltip for all of the data points at that index
if(this.datasets && this.datasets.length > 1) {
var dataArray,
dataIndex;
for(var i = this.datasets.length - 1; i >= 0; i--) {
dataArray = this.datasets[i].points || this.datasets[i].bars || this.datasets[i].segments;
dataIndex = indexOf(dataArray, ChartElements[0]);
if(dataIndex !== -1) {
break;
}
}
var tooltipLabels = [],
tooltipColors = [],
medianPosition = (function(index) {
// Get all the points at that particular index
var Elements = [],
dataCollection,
xPositions = [],
yPositions = [],
xMax,
yMax,
xMin,
yMin;
helpers.each(this.datasets, function(dataset) {
/// ZUI change begin
if(dataset.showTooltips === false) return;
/// ZUI change end
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: template(this.options.multiTooltipTitleTemplate, ChartElements[0]),
chart: this.chart,
ctx: this.chart.ctx,
custom: this.options.customTooltips
}).draw();
} else {
each(ChartElements, function(Element) {
var tooltipPosition = Element.tooltipPosition();
new Chart.Tooltip({
x: Math.round(tooltipPosition.x),
y: Math.round(tooltipPosition.y),
xPadding: this.options.tooltipXPadding,
yPadding: this.options.tooltipYPadding,
fillColor: this.options.tooltipFillColor,
textColor: this.options.tooltipFontColor,
fontFamily: this.options.tooltipFontFamily,
fontStyle: this.options.tooltipFontStyle,
fontSize: this.options.tooltipFontSize,
caretHeight: this.options.tooltipCaretSize,
cornerRadius: this.options.tooltipCornerRadius,
text: template(this.options.tooltipTemplate, Element),
chart: this.chart,
custom: this.options.customTooltips
}).draw();
}, this);
}
}
return this;
},
toBase64Image: function() {
return this.chart.canvas.toDataURL.apply(this.chart.canvas, arguments);
}
});
Chart.Type.extend = function(extensions) {
var parent = this;
var ChartType = function() {
return parent.apply(this, arguments);
};
//Copy the prototype object of the this class
ChartType.prototype = clone(parent.prototype);
//Now overwrite some of the properties in the base class with the new extensions
extend(ChartType.prototype, extensions);
ChartType.extend = Chart.Type.extend;
if(extensions.name || parent.prototype.name) {
var chartName = extensions.name || parent.prototype.name;
//Assign any potential default values of the new chart type
//If none are defined, we'll use a clone of the chart type this is being extended from.
//I.e. if we extend a line chart, we'll use the defaults from the line chart if our new chart
//doesn't define some defaults of their own.
var baseDefaults = (Chart.defaults[parent.prototype.name]) ? clone(Chart.defaults[parent.prototype.name]) : {};
Chart.defaults[chartName] = extend(baseDefaults, extensions.defaults);
Chart.types[chartName] = ChartType;
//Register this new chart type in the Chart prototype
Chart.prototype[chartName] = function(data, options) {
var config = merge(Chart.defaults.global, Chart.defaults[chartName], options || {});
return new ChartType(data, config, this);
};
} else {
warn("Name not provided for this chart, so it hasn't been registered");
}
return parent;
};
Chart.Element = function(configuration) {
extend(this, configuration);
this.initialize.apply(this, arguments);
this.save();
};
extend(Chart.Element.prototype, {
initialize: function() {},
restore: function(props) {
if(!props) {
extend(this, this._saved);
} else {
each(props, function(key) {
this[key] = this._saved[key];
}, this);
}
return this;
},
save: function() {
this._saved = clone(this);
delete this._saved._saved;
return this;
},
update: function(newProps) {
each(newProps, function(value, key) {
this._saved[key] = this[key];
this[key] = value;
}, this);
return this;
},
transition: function(props, ease) {
each(props, function(value, key) {
this[key] = ((value - this._saved[key]) * ease) + this._saved[key];
}, this);
return this;
},
tooltipPosition: function() {
return {
x: this.x,
y: this.y
};
},
hasValue: function() {
return isNumber(this.value);
}
});
Chart.Element.extend = inherits;
Chart.Point = Chart.Element.extend({
display: true,
inRange: function(chartX, chartY) {
var hitDetectionRange = this.hitDetectionRadius + this.radius;
return((Math.pow(chartX - this.x, 2) + Math.pow(chartY - this.y, 2)) < Math.pow(hitDetectionRange, 2));
},
draw: function() {
if(this.display) {
var ctx = this.ctx;
ctx.beginPath();
ctx.arc(this.x, this.y, this.radius, 0, Math.PI * 2);
ctx.closePath();
ctx.strokeStyle = this.strokeColor;
ctx.lineWidth = this.strokeWidth;
ctx.fillStyle = this.fillColor;
ctx.fill();
ctx.stroke();
}
//Quick debug for bezier curve splining
//Highlights control points and the line between them.
//Handy for dev - stripped in the min version.
// ctx.save();
// ctx.fillStyle = "black";
// ctx.strokeStyle = "black"
// ctx.beginPath();
// ctx.arc(this.controlPoints.inner.x,this.controlPoints.inner.y, 2, 0, Math.PI*2);
// ctx.fill(