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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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/* ======================================================================== * 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(