186 lines
6.2 KiB
JavaScript
186 lines
6.2 KiB
JavaScript
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// Generated by CoffeeScript 1.4.0
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/*
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Easy pie chart is a jquery plugin to display simple animated pie charts for only one value
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Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
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and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
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Built on top of the jQuery library (http://jquery.com)
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@source: http://github.com/rendro/easy-pie-chart/
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@autor: Robert Fleischmann
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@version: 1.0.1
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Inspired by: http://dribbble.com/shots/631074-Simple-Pie-Charts-II?list=popular&offset=210
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Thanks to Philip Thrasher for the jquery plugin boilerplate for coffee script
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*/
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(function() {
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(function($) {
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$.easyPieChart = function(el, options) {
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var addScaleLine, animateLine, drawLine, easeInOutQuad, renderBackground, renderScale, renderTrack,
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_this = this;
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this.el = el;
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this.$el = $(el);
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this.$el.data("easyPieChart", this);
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this.init = function() {
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var percent;
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_this.options = $.extend({}, $.easyPieChart.defaultOptions, options);
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percent = parseInt(_this.$el.data('percent'), 10);
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_this.percentage = 0;
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_this.canvas = $("<canvas width='" + _this.options.size + "' height='" + _this.options.size + "'></canvas>").get(0);
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_this.$el.append(_this.canvas);
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if (typeof G_vmlCanvasManager !== "undefined" && G_vmlCanvasManager !== null) {
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G_vmlCanvasManager.initElement(_this.canvas);
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}
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_this.ctx = _this.canvas.getContext('2d');
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if (window.devicePixelRatio > 1.5) {
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$(_this.canvas).css({
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width: _this.options.size,
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height: _this.options.size
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});
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_this.canvas.width *= 2;
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_this.canvas.height *= 2;
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_this.ctx.scale(2, 2);
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}
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_this.ctx.translate(_this.options.size / 2, _this.options.size / 2);
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_this.$el.addClass('easyPieChart');
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_this.$el.css({
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width: _this.options.size,
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height: _this.options.size,
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lineHeight: "" + _this.options.size + "px"
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});
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_this.update(percent);
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return _this;
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};
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this.update = function(percent) {
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if (_this.options.animate === false) {
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return drawLine(percent);
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} else {
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return animateLine(_this.percentage, percent);
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}
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};
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renderScale = function() {
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var i, _i, _results;
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_this.ctx.fillStyle = _this.options.scaleColor;
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_this.ctx.lineWidth = 1;
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_results = [];
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for (i = _i = 0; _i <= 24; i = ++_i) {
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_results.push(addScaleLine(i));
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}
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return _results;
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};
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addScaleLine = function(i) {
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var offset;
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offset = i % 6 === 0 ? 0 : _this.options.size * 0.017;
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_this.ctx.save();
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_this.ctx.rotate(i * Math.PI / 12);
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_this.ctx.fillRect(_this.options.size / 2 - offset, 0, -_this.options.size * 0.05 + offset, 1);
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return _this.ctx.restore();
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};
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renderTrack = function() {
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var offset;
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offset = _this.options.size / 2 - _this.options.lineWidth / 2;
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if (_this.options.scaleColor !== false) {
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offset -= _this.options.size * 0.08;
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}
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_this.ctx.beginPath();
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_this.ctx.arc(0, 0, offset, 0, Math.PI * 2, true);
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_this.ctx.closePath();
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_this.ctx.strokeStyle = _this.options.trackColor;
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_this.ctx.lineWidth = _this.options.lineWidth;
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return _this.ctx.stroke();
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};
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renderBackground = function() {
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if (_this.options.scaleColor !== false) {
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renderScale();
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}
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if (_this.options.trackColor !== false) {
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return renderTrack();
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}
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};
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drawLine = function(percent) {
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var offset;
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renderBackground();
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_this.ctx.strokeStyle = $.isFunction(_this.options.barColor) ? _this.options.barColor(percent) : _this.options.barColor;
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_this.ctx.lineCap = _this.options.lineCap;
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_this.ctx.lineWidth = _this.options.lineWidth;
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offset = _this.options.size / 2 - _this.options.lineWidth / 2;
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if (_this.options.scaleColor !== false) {
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offset -= _this.options.size * 0.08;
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}
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_this.ctx.save();
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_this.ctx.rotate(-Math.PI / 2);
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_this.ctx.beginPath();
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_this.ctx.arc(0, 0, offset, 0, Math.PI * 2 * percent / 100, false);
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_this.ctx.stroke();
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return _this.ctx.restore();
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};
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animateLine = function(from, to) {
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var currentStep, fps, steps;
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fps = 30;
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steps = fps * _this.options.animate / 1000;
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currentStep = 0;
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_this.options.onStart.call(_this);
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_this.percentage = to;
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if (_this.animation) {
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clearInterval(_this.animation);
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_this.animation = false;
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}
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return _this.animation = setInterval(function() {
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_this.ctx.clearRect(-_this.options.size / 2, -_this.options.size / 2, _this.options.size, _this.options.size);
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renderBackground.call(_this);
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drawLine.call(_this, [easeInOutQuad(currentStep, from, to - from, steps)]);
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currentStep++;
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if ((currentStep / steps) > 1) {
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clearInterval(_this.animation);
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_this.animation = false;
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return _this.options.onStop.call(_this);
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}
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}, 1000 / fps);
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};
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easeInOutQuad = function(t, b, c, d) {
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var easeIn, easing;
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easeIn = function(t) {
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return Math.pow(t, 2);
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};
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easing = function(t) {
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if (t < 1) {
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return easeIn(t);
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} else {
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return 2 - easeIn((t / 2) * -2 + 2);
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}
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};
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t /= d / 2;
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return c / 2 * easing(t) + b;
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};
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return this.init();
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};
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$.easyPieChart.defaultOptions = {
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barColor: '#ef1e25',
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trackColor: '#f2f2f2',
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scaleColor: '#dfe0e0',
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lineCap: 'round',
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size: 110,
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lineWidth: 3,
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animate: false,
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onStart: $.noop,
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onStop: $.noop
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};
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$.fn.easyPieChart = function(options) {
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return $.each(this, function(i, el) {
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var $el;
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$el = $(el);
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if (!$el.data('easyPieChart')) {
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return $el.data('easyPieChart', new $.easyPieChart(el, options));
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}
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});
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};
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return void 0;
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})(jQuery);
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}).call(this);
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