267 lines
8.6 KiB
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<h1 class="file-heading">File: src/pixi/utils/EventTarget.js</h1>
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<pre class="code prettyprint linenums">
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/**
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* https://github.com/mrdoob/eventtarget.js/
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* THankS mr DOob!
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*/
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/**
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* Adds event emitter functionality to a class
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*
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* @class EventTarget
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* @example
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* function MyEmitter() {
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* PIXI.EventTarget.call(this); //mixes in event target stuff
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* }
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*
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* var em = new MyEmitter();
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* em.emit({ type: 'eventName', data: 'some data' });
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*/
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PIXI.EventTarget = function () {
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var listeners = {};
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this.addEventListener = this.on = function ( type, listener ) {
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if ( listeners[ type ] === undefined ) {
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listeners[ type ] = [];
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}
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if ( listeners[ type ].indexOf( listener ) === - 1 ) {
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listeners[ type ].push( listener );
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}
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};
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this.dispatchEvent = this.emit = function ( event ) {
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if ( !listeners[ event.type ] || !listeners[ event.type ].length ) {
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return;
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}
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for(var i = 0, l = listeners[ event.type ].length; i < l; i++) {
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listeners[ event.type ][ i ]( event );
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}
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};
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this.removeEventListener = this.off = function ( type, listener ) {
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var index = listeners[ type ].indexOf( listener );
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if ( index !== - 1 ) {
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listeners[ type ].splice( index, 1 );
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}
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};
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this.removeAllEventListeners = function( type ) {
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var a = listeners[type];
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if (a)
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a.length = 0;
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};
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};
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</pre>
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