blinker / firefox.plugin / data / lib / circle-progress.js @ 76dd22bd
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/*
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jquery-circle-progress - jQuery Plugin to draw animated circular progress bars
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URL: http://kottenator.github.io/jquery-circle-progress/
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Author: Rostyslav Bryzgunov <kottenator@gmail.com>
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Version: 1.1.2
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License: MIT
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*/
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(function($) { |
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function CircleProgress(config) { |
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this.init(config);
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} |
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CircleProgress.prototype = {
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//----------------------------------------------- public options -----------------------------------------------
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/**
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* This is the only required option. It should be from 0.0 to 1.0
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* @type {number}
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*/
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value: 0.0, |
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/**
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* Size of the circle / canvas in pixels
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* @type {number}
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*/
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size: 100.0, |
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/**
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* Initial angle for 0.0 value in radians
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* @type {number}
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*/
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startAngle: -Math.PI,
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/**
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* Width of the arc. By default it's auto-calculated as 1/14 of size, but you may set it explicitly in pixels
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* @type {number|string}
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*/
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thickness: 'auto', |
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/**
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* Fill of the arc. You may set it to:
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* - solid color:
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* - { color: '#3aeabb' }
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* - { color: 'rgba(255, 255, 255, .3)' }
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* - linear gradient (left to right):
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* - { gradient: ['#3aeabb', '#fdd250'], gradientAngle: Math.PI / 4 }
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* - { gradient: ['red', 'green', 'blue'], gradientDirection: [x0, y0, x1, y1] }
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* - image:
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* - { image: 'http://i.imgur.com/pT0i89v.png' }
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* - { image: imageObject }
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* - { color: 'lime', image: 'http://i.imgur.com/pT0i89v.png' } - color displayed until the image is loaded
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*/
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fill: {
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gradient: ['#3aeabb', '#fdd250'] |
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}, |
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/**
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* Color of the "empty" arc. Only a color fill supported by now
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* @type {string}
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*/
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emptyFill: 'rgba(0, 0, 0, .1)', |
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/**
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* Animation config (see jQuery animations: http://api.jquery.com/animate/)
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*/
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animation: {
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duration: 1200, |
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easing: 'circleProgressEasing' |
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}, |
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/**
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* Default animation starts at 0.0 and ends at specified `value`. Let's call this direct animation.
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* If you want to make reversed animation then you should set `animationStartValue` to 1.0.
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* Also you may specify any other value from 0.0 to 1.0
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* @type {number}
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*/
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animationStartValue: 0.0, |
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/**
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* Reverse animation and arc draw
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* @type {boolean}
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*/
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reverse: false, |
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/**
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* Arc line cap ('butt' (default), 'round' and 'square')
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* Read more: https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D.lineCap
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* @type {string}
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*/
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lineCap: 'butt', |
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//-------------------------------------- protected properties and methods --------------------------------------
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/**
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* @protected
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*/
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constructor: CircleProgress,
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/**
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* Container element. Should be passed into constructor config
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* @protected
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* @type {jQuery}
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*/
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el: null, |
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/**
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* Canvas element. Automatically generated and prepended to the {@link CircleProgress.el container}
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* @protected
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* @type {HTMLCanvasElement}
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*/
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canvas: null, |
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/**
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* 2D-context of the {@link CircleProgress.canvas canvas}
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* @protected
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* @type {CanvasRenderingContext2D}
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*/
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ctx: null, |
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/**
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* Radius of the outer circle. Automatically calculated as {@link CircleProgress.size} / 2
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* @protected
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* @type {number}
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*/
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radius: 0.0, |
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/**
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* Fill of the main arc. Automatically calculated, depending on {@link CircleProgress.fill} option
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* @protected
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* @type {string|CanvasGradient|CanvasPattern}
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*/
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arcFill: null, |
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/**
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* Last rendered frame value
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* @protected
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* @type {number}
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*/
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lastFrameValue: 0.0, |
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/**
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* Init/re-init the widget
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* @param {object} config Config
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*/
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init: function(config) { |
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$.extend(this, config); |
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this.radius = this.size / 2; |
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this.initWidget();
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this.initFill();
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this.draw();
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}, |
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/**
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* @protected
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*/
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initWidget: function() { |
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var canvas = this.canvas = this.canvas || $('<canvas>').prependTo(this.el)[0]; |
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canvas.width = this.size;
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canvas.height = this.size;
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this.ctx = canvas.getContext('2d'); |
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}, |
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/**
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* This method sets {@link CircleProgress.arcFill}
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* It could do this async (on image load)
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* @protected
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*/
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initFill: function() { |
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var self = this, |
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fill = this.fill,
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ctx = this.ctx,
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size = this.size;
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if (!fill)
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throw Error("The fill is not specified!"); |
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if (fill.color)
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this.arcFill = fill.color;
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if (fill.gradient) {
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var gr = fill.gradient;
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if (gr.length == 1) { |
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this.arcFill = gr[0]; |
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} else if (gr.length > 1) { |
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var ga = fill.gradientAngle || 0, // gradient direction angle; 0 by default |
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gd = fill.gradientDirection || [ |
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size / 2 * (1 - Math.cos(ga)), // x0 |
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size / 2 * (1 + Math.sin(ga)), // y0 |
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size / 2 * (1 + Math.cos(ga)), // x1 |
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size / 2 * (1 - Math.sin(ga)) // y1 |
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]; |
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var lg = ctx.createLinearGradient.apply(ctx, gd);
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for (var i = 0; i < gr.length; i++) { |
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var color = gr[i],
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pos = i / (gr.length - 1);
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if ($.isArray(color)) { |
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pos = color[1];
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color = color[0];
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} |
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lg.addColorStop(pos, color); |
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} |
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this.arcFill = lg;
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} |
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} |
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if (fill.image) {
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var img;
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if (fill.image instanceof Image) { |
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img = fill.image; |
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} else {
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img = new Image();
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img.src = fill.image; |
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} |
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if (img.complete)
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setImageFill(); |
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else
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img.onload = setImageFill; |
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} |
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function setImageFill() { |
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var bg = $('<canvas>')[0]; |
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bg.width = self.size; |
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bg.height = self.size; |
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bg.getContext('2d').drawImage(img, 0, 0, size, size); |
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self.arcFill = self.ctx.createPattern(bg, 'no-repeat');
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self.drawFrame(self.lastFrameValue); |
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} |
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}, |
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draw: function() { |
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if (this.animation) |
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this.drawAnimated(this.value); |
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else
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this.drawFrame(this.value); |
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}, |
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/**
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* @protected
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* @param {number} v Frame value
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*/
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drawFrame: function(v) { |
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this.lastFrameValue = v;
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this.ctx.clearRect(0, 0, this.size, this.size); |
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this.drawEmptyArc(v);
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this.drawArc(v);
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}, |
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/**
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* @protected
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* @param {number} v Frame value
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*/
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drawArc: function(v) { |
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var ctx = this.ctx, |
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r = this.radius,
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t = this.getThickness(),
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a = this.startAngle;
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ctx.save(); |
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ctx.beginPath(); |
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if (!this.reverse) { |
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ctx.arc(r, r, r - t / 2, a, a + Math.PI * 2 * v); |
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} else {
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ctx.arc(r, r, r - t / 2, a - Math.PI * 2 * v, a); |
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} |
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ctx.lineWidth = t; |
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ctx.lineCap = this.lineCap;
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ctx.strokeStyle = this.arcFill;
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ctx.stroke(); |
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ctx.restore(); |
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}, |
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/**
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* @protected
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* @param {number} v Frame value
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*/
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drawEmptyArc: function(v) { |
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var ctx = this.ctx, |
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r = this.radius,
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t = this.getThickness(),
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a = this.startAngle;
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if (v < 1) { |
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ctx.save(); |
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ctx.beginPath(); |
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if (v <= 0) { |
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ctx.arc(r, r, r - t / 2, 0, Math.PI * 2); |
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} else {
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if (!this.reverse) { |
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ctx.arc(r, r, r - t / 2, a + Math.PI * 2 * v, a); |
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} else {
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ctx.arc(r, r, r - t / 2, a, a - Math.PI * 2 * v); |
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} |
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} |
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ctx.lineWidth = t; |
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ctx.strokeStyle = this.emptyFill;
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ctx.stroke(); |
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ctx.restore(); |
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} |
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}, |
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/**
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* @protected
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* @param {number} v Value
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*/
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drawAnimated: function(v) { |
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var self = this, |
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el = this.el;
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el.trigger('circle-animation-start');
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$(this.canvas) |
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.stop(true, true) |
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.css({ animationProgress: 0 })
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.animate({ animationProgress: 1 }, $.extend({}, this.animation, {
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step: function(animationProgress) { |
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var stepValue = self.animationStartValue * (1 - animationProgress) + v * animationProgress; |
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self.drawFrame(stepValue); |
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el.trigger('circle-animation-progress', [animationProgress, stepValue]);
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}, |
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complete: function() { |
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el.trigger('circle-animation-end');
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} |
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})); |
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}, |
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/**
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* @protected
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* @returns {number}
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*/
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getThickness: function() { |
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return $.isNumeric(this.thickness) ? this.thickness : this.size / 14; |
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} |
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}; |
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//-------------------------------------------- Initiating jQuery plugin --------------------------------------------
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$.circleProgress = {
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// Default options (you may override them)
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defaults: CircleProgress.prototype
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}; |
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// ease-in-out-cubic
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$.easing.circleProgressEasing = function(x, t, b, c, d) { |
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if ((t /= d / 2) < 1) |
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return c / 2 * t * t * t + b; |
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return c / 2 * ((t -= 2) * t * t + 2) + b; |
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}; |
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/**
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* Draw animated circular progress bar.
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*
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* Appends <canvas> to the element or updates already appended one.
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*
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* If animated, throws 3 events:
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*
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* - circle-animation-start(jqEvent)
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* - circle-animation-progress(jqEvent, animationProgress, stepValue) - multiple event;
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* animationProgress: from 0.0 to 1.0;
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* stepValue: from 0.0 to value
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* - circle-animation-end(jqEvent)
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*
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* @param config Example: { value: 0.75, size: 50, animation: false };
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* you may set any of public options;
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* `animation` may be set to false;
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* you may also use .circleProgress('widget') to get the canvas
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*/
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$.fn.circleProgress = function(config) { |
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var dataName = 'circle-progress'; |
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if (config == 'widget') { |
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var data = this.data(dataName); |
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return data && data.canvas;
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} |
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return this.each(function() { |
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var el = $(this), |
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instance = el.data(dataName), |
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cfg = $.isPlainObject(config) ? config : {};
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if (instance) {
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instance.init(cfg); |
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} else {
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cfg.el = el; |
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instance = new CircleProgress(cfg);
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el.data(dataName, instance); |
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} |
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}); |
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}; |
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})(jQuery); |