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269 lines
7.3 KiB
269 lines
7.3 KiB
# easyPieChart
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> Lightweight plugin to render simple, animated and retina optimized pie charts
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[](https://travis-ci.org/rendro/easy-pie-chart)
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[](https://david-dm.org/rendro/easy-pie-chart)
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[](https://github.com/igrigorik/ga-beacon)
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## Features
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[](http://drbl.in/ezuc)
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* highly customizable
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* very easy to implement
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* resolution independent (retina optimized)
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* uses `requestAnimationFrame` for smooth animations on modern devices and
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* works in all modern browsers, even in IE7+ with [excanvas](https://code.google.com/p/explorercanvas/wiki/Instructions)
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#### framework support
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* Vanilla JS *(no dependencies)* (~872 bytes)
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* jQuery plugin (~921 bytes)
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* Angular Module (~983 bytes)
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## Get started
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#### Installation
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You can also use [bower](http://bower.io) to install the component:
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```
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$ bower install jquery.easy-pie-chart
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```
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#### jQuery
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To use the easy pie chart plugin you need to load the current version of jQuery (> 1.6.4) and the source of the plugin.
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```html
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<div class="chart" data-percent="73" data-scale-color="#ffb400">73%</div>
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<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
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<script src="/path/to/jquery.easy-pie-chart.js"></script>
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<script>
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$(function() {
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$('.chart').easyPieChart({
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//your options goes here
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});
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});
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</script>
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```
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#### Vanilla JS
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If you don't want to use jQuery, implement the Vanilla JS version without any dependencies.
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```html
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<div class="chart" data-percent="73">73%</div>
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<script src="/path/to/easy-pie-chart.js"></script>
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<script>
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var element = document.querySelector('.chart');
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new EasyPieChart(element, {
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// your options goes here
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});
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</script>
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```
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#### AngularJS
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```html
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<div ng-controller="chartCtrl">
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<div easypiechart options="options" percent="percent"></div>
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</div>
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<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.9/angular.min.js"></script>
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<script src="../dist/angular.easypiechart.min.js"></script>
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<script>
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var app = angular.module('app', ['easypiechart']);
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app.controller('chartCtrl', ['$scope', function ($scope) {
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$scope.percent = 65;
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$scope.options = {
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animate:{
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duration:0,
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enabled:false
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},
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barColor:'#2C3E50',
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scaleColor:false,
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lineWidth:20,
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lineCap:'circle'
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};
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}]);
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</script>
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```
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## Options
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You can pass these options to the initialize function to set a custom look and feel for the plugin.
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<table>
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<tr>
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<th>Property (Type)</th>
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<th>Default</th>
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<th>Description</th>
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</tr>
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<tr>
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<td><strong>barColor</strong></td>
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<td>#ef1e25</td>
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<td>The color of the curcular bar. You can either pass a valid css color string, or a function that takes the current percentage as a value and returns a valid css color string.</td>
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</tr>
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<tr>
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<td><strong>trackColor</strong></td>
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<td>#f2f2f2</td>
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<td>The color of the track, or false to disable rendering.</td>
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</tr>
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<tr>
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<td><strong>scaleColor</strong></td>
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<td>#dfe0e0</td>
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<td>The color of the scale lines, false to disable rendering.</td>
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</tr>
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<tr>
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<td><strong>scaleLength</strong></td>
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<td>5</td>
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<td>Length of the scale lines (reduces the radius of the chart).</td>
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</tr>
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<tr>
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<td><strong>lineCap</strong></td>
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<td>round</td>
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<td>Defines how the ending of the bar line looks like. Possible values are: <code>butt</code>, <code>round</code> and <code>square</code>.</td>
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</tr>
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<tr>
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<td><strong>lineWidth</strong></td>
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<td>3</td>
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<td>Width of the chart line in px.</td>
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</tr>
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<tr>
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<td><strong>size</strong></td>
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<td>110</td>
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<td>Size of the pie chart in px. It will always be a square.</td>
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</tr>
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<tr>
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<td><strong>rotate</strong></td>
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<td>0</td>
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<td>Rotation of the complete chart in degrees.</td>
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</tr>
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<tr>
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<td><strong>animate</strong></td>
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<td>object</td>
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<td>Object with time in milliseconds and boolean for an animation of the bar growing (<code>{ duration: 1000, enabled: true }</code>), or false to deactivate animations.</td>
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</tr>
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<tr>
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<td><strong>easing</strong></td>
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<td>defaultEasing</td>
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<td>Easing function or string with the name of a <a href="http://gsgd.co.uk/sandbox/jquery/easing/" target="_blank">jQuery easing function</a></td>
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</tr>
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</table>
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## Callbacks
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All callbacks will only be called if `animate` is not `false`.
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<table>
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<tr>
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<th>Callback(params, ...)</th>
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<th>Description</th>
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</tr>
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<tr>
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<td><strong>onStart(from, to)</strong></td>
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<td>Is called at the start of any animation.</td>
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</tr>
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<tr>
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<td><strong>onStep(from, to, currentValue)</strong></td>
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<td>Is called during animations providing the current value (the method is scoped to the context of th eplugin, so you can access the DOM element via <code>this.el</code>).</td>
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</tr>
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<tr>
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<td><strong>onStop(from, to)</strong></td>
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<td>Is called at the end of any animation.</td>
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</tr>
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</table>
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## Plugin api
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#### jQuery
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```javascript
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$(function() {
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// instantiate the plugin
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...
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// update
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$('.chart').data('easyPieChart').update(40);
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...
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// disable animation
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$('.chart').data('easyPieChart').disableAnimation();
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...
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// enable animation
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$('.chart').data('easyPieChart').enableAnimation();
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});
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```
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#### Vanilla JS
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```javascript
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// instantiate the plugin
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var chart = new EasyPieChart(element, options);
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// update
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chart.update(40);
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// disable animation
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chart.disableAnimation();
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// enable animation
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chart.enableAnimation();
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```
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###### Using a gradient
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```javascript
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new EasyPieChart(element, {
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barColor: function(percent) {
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var ctx = this.renderer.ctx();
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var canvas = this.renderer.canvas();
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var gradient = ctx.createLinearGradient(0,0,canvas.width,0);
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gradient.addColorStop(0, "#ffe57e");
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gradient.addColorStop(1, "#de5900");
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return gradient;
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}
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});
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```
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#### AngularJS
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For a value binding you need to add the `percent` attribute and bind it to your controller.
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#### RequireJS
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When using [RequireJS](http://requirejs.org) you can define your own name. Examples can be found in the `demo/requirejs.html`.
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## Browser Support
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Native support
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* Chrome
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* Safari
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* FireFox
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* Opera
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* Internet Explorer 9+
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Support for Internet Explorer 7 and 8 with [excanvas](https://code.google.com/p/explorercanvas/wiki/Instructions) polyfill.
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## Test
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To run the test just use the karma adapter of grunt: `grunt test`
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## Credits
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Thanks to [Rafal Bromirski](http://www.paranoida.com/) for designing [this dribble shot](http://drbl.in/ezuc) which inspired me building this plugin.
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## Copyright
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Copyright (c) 2014 Robert Fleischmann, contributors. Released under the MIT, GPL licenses
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