https://www.eaje.eu/site/theme/js/jquery.easy-pie-chart.js

1// Generated by CoffeeScript 1.6.3
2/*
3Easy pie chart is a jquery plugin to display simple animated pie charts for only one value
4
5Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
6and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
7
8Built on top of the jQuery library (http://jquery.com)
9
10@source: http://github.com/rendro/easy-pie-chart/
11@autor: Robert Fleischmann
12@version: 1.2.5
13
14Inspired by: http://dribbble.com/shots/631074-Simple-Pie-Charts-II?list=popular&offset=210
15Thanks to Philip Thrasher for the jquery plugin boilerplate for coffee script
16*/
17
18(function($) {
19  $.easyPieChart = function(el, options) {
20    var addScaleLine, animateLine, drawLine, easeInOutQuad, rAF, renderBackground, renderScale, renderTrack,
21      _this = this;
22    this.el = el;
23    this.$el = $(el);
24    this.$el.data("easyPieChart", this);
25    this.init = function() {
26      var percent, scaleBy;
27      _this.options = $.extend({}, $.easyPieChart.defaultOptions, options);
28      percent = parseInt(_this.$el.data('percent'), 10);
29      _this.percentage = 0;
30      _this.canvas = $("<canvas width='" + _this.options.size + "' height='" + _this.options.size + "'></canvas>").get(0);
31      _this.$el.append(_this.canvas);
32      if (typeof G_vmlCanvasManager !== "undefined" && G_vmlCanvasManager !== null) {
33        G_vmlCanvasManager.initElement(_this.canvas);
34      }
35      _this.ctx = _this.canvas.getContext('2d');
36      if (window.devicePixelRatio > 1) {
37        scaleBy = window.devicePixelRatio;
38        $(_this.canvas).css({
39          width: _this.options.size,
40          height: _this.options.size
41        });
42        _this.canvas.width *= scaleBy;
43        _this.canvas.height *= scaleBy;
44        _this.ctx.scale(scaleBy, scaleBy);
45      }
46      _this.ctx.translate(_this.options.size / 2, _this.options.size / 2);
47      _this.ctx.rotate(_this.options.rotate * Math.PI / 180);
48      _this.$el.addClass('easyPieChart');
49      _this.$el.css({
50        width: _this.options.size,
51        height: _this.options.size,
52        lineHeight: "" + _this.options.size + "px"
53      });
54      _this.update(percent);
55      return _this;
56    };
57    this.update = function(percent) {
58      percent = parseFloat(percent) || 0;
59      if (_this.options.animate === false) {
60        drawLine(percent);
61      } else {
62        if (_this.options.delay) {
63          animateLine(_this.percentage, 0);
64          setTimeout(function() {
65            return animateLine(_this.percentage, percent);
66          }, _this.options.delay);
67        } else {
68          animateLine(_this.percentage, percent);
69        }
70      }
71      return _this;
72    };
73    renderScale = function() {
74      var i, _i, _results;
75      _this.ctx.fillStyle = _this.options.scaleColor;
76      _this.ctx.lineWidth = 1;
77      _results = [];
78      for (i = _i = 0; _i <= 24; i = ++_i) {
79        _results.push(addScaleLine(i));
80      }
81      return _results;
82    };
83    addScaleLine = function(i) {
84      var offset;
85      offset = i % 6 === 0 ? 0 : _this.options.size * 0.017;
86      _this.ctx.save();
87      _this.ctx.rotate(i * Math.PI / 12);
88      _this.ctx.fillRect(_this.options.size / 2 - offset, 0, -_this.options.size * 0.05 + offset, 1);
89      _this.ctx.restore();
90    };
91    renderTrack = function() {
92      var offset;
93      offset = _this.options.size / 2 - _this.options.lineWidth / 2;
94      if (_this.options.scaleColor !== false) {
95        offset -= _this.options.size * 0.08;
96      }
97      _this.ctx.beginPath();
98      _this.ctx.arc(0, 0, offset, 0, Math.PI * 2, true);
99      _this.ctx.closePath();
100      _this.ctx.strokeStyle = _this.options.trackColor;
101      _this.ctx.lineWidth = _this.options.lineWidth;
102      _this.ctx.stroke();
103    };
104    renderBackground = function() {
105      if (_this.options.scaleColor !== false) {
106        renderScale();
107      }
108      if (_this.options.trackColor !== false) {
109        renderTrack();
110      }
111    };
112    drawLine = function(percent) {
113      var offset;
114      renderBackground();
115      _this.ctx.strokeStyle = $.isFunction(_this.options.barColor) ? _this.options.barColor(percent) : _this.options.barColor;
116      _this.ctx.lineCap = _this.options.lineCap;
117      _this.ctx.lineWidth = _this.options.lineWidth;
118      offset = _this.options.size / 2 - _this.options.lineWidth / 2;
119      if (_this.options.scaleColor !== false) {
120        offset -= _this.options.size * 0.08;
121      }
122      _this.ctx.save();
123      _this.ctx.rotate(-Math.PI / 2);
124      _this.ctx.beginPath();
125      _this.ctx.arc(0, 0, offset, 0, Math.PI * 2 * percent / 100, false);
126      _this.ctx.stroke();

127      _this.ctx.restore();
128    };
129    rAF = (function() {
130      return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || function(callback) {
131        return window.setTimeout(callback, 1000 / 60);
132      };
133    })();
134    animateLine = function(from, to) {
135      var anim, startTime;
136      _this.options.onStart.call(_this);
137      _this.percentage = to;
138      Date.now || (Date.now = function() {
139        return +(new Date);
140      });
141      startTime = Date.now();
142      anim = function() {
143        var currentValue, process;
144        process = Math.min(Date.now() - startTime, _this.options.animate);
145        _this.ctx.clearRect(-_this.options.size / 2, -_this.options.size / 2, _this.options.size, _this.options.size);
146        renderBackground.call(_this);
147        currentValue = [easeInOutQuad(process, from, to - from, _this.options.animate)];
148        _this.options.onStep.call(_this, currentValue);
149        drawLine.call(_this, currentValue);
150        if (process >= _this.options.animate) {
151          return _this.options.onStop.call(_this, currentValue, to);
152        } else {
153          return rAF(anim);
154        }
155      };
156      rAF(anim);
157    };
158    easeInOutQuad = function(t, b, c, d) {
159      var easeIn, easing;
160      easeIn = function(t) {
161        return Math.pow(t, 2);
162      };
163      easing = function(t) {
164        if (t < 1) {
165          return easeIn(t);
166        } else {
167          return 2 - easeIn((t / 2) * -2 + 2);
168        }
169      };
170      t /= d / 2;
171      return c / 2 * easing(t) + b;
172    };
173    return this.init();
174  };
175  $.easyPieChart.defaultOptions = {
176    barColor: '#ef1e25',
177    trackColor: '#f2f2f2',
178    scaleColor: '#dfe0e0',
179    lineCap: 'round',
180    rotate: 0,
181    size: 110,
182    lineWidth: 3,
183    animate: false,
184    delay: false,
185    onStart: $.noop,
186    onStop: $.noop,
187    onStep: $.noop
188  };
189  $.fn.easyPieChart = function(options) {
190    return $.each(this, function(i, el) {
191      var $el, instanceOptions;
192      $el = $(el);
193      if (!$el.data('easyPieChart')) {
194        instanceOptions = $.extend({}, options, $el.data());
195        return $el.data('easyPieChart', new $.easyPieChart(el, instanceOptions));
196      }
197    });
198  };
199  return void 0;
200})(jQuery);