<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>src/pixi/utils/EventTarget.js - pixi.js</title>
<link rel="stylesheet" href="http://yui.yahooapis.com/3.9.1/build/cssgrids/cssgrids-min.css">
<link rel="stylesheet" href="../assets/vendor/prettify/prettify-min.css">
<link rel="stylesheet" href="../assets/css/main.css" id="site_styles">
<link rel="shortcut icon" type="image/png" href="../assets/favicon.png">
<script src="http://yui.yahooapis.com/combo?3.9.1/build/yui/yui-min.js"></script>
</head>
<body class="yui3-skin-sam">
<div id="doc">
<div id="hd" class="yui3-g header">
<div class="yui3-u-3-4">
<h1><img src="http://www.goodboydigital.com/pixijs/logo_small.png" title="pixi.js"></h1>
</div>
<div class="yui3-u-1-4 version">
<em>API Docs for: 2.1.0</em>
</div>
</div>
<div id="bd" class="yui3-g">
<div class="yui3-u-1-4">
<div id="docs-sidebar" class="sidebar apidocs">
<div id="api-list">
<h2 class="off-left">APIs</h2>
<div id="api-tabview" class="tabview">
<ul class="tabs">
<li><a href="#api-classes">Classes</a></li>
<li><a href="#api-modules">Modules</a></li>
</ul>
<div id="api-tabview-filter">
<input type="search" id="api-filter" placeholder="Type to filter APIs">
</div>
<div id="api-tabview-panel">
<ul id="api-classes" class="apis classes">
<li><a href="../classes/AbstractFilter.html">AbstractFilter</a></li>
<li><a href="../classes/AjaxRequest.html">AjaxRequest</a></li>
<li><a href="../classes/AlphaMaskFilter.html">AlphaMaskFilter</a></li>
<li><a href="../classes/AsciiFilter.html">AsciiFilter</a></li>
<li><a href="../classes/AssetLoader.html">AssetLoader</a></li>
<li><a href="../classes/AtlasLoader.html">AtlasLoader</a></li>
<li><a href="../classes/autoDetectRecommendedRenderer.html">autoDetectRecommendedRenderer</a></li>
<li><a href="../classes/autoDetectRenderer.html">autoDetectRenderer</a></li>
<li><a href="../classes/BaseTexture.html">BaseTexture</a></li>
<li><a href="../classes/BitmapFontLoader.html">BitmapFontLoader</a></li>
<li><a href="../classes/BitmapText.html">BitmapText</a></li>
<li><a href="../classes/BlurFilter.html">BlurFilter</a></li>
<li><a href="../classes/BlurXFilter.html">BlurXFilter</a></li>
<li><a href="../classes/BlurYFilter.html">BlurYFilter</a></li>
<li><a href="../classes/CanvasBuffer.html">CanvasBuffer</a></li>
<li><a href="../classes/CanvasGraphics.html">CanvasGraphics</a></li>
<li><a href="../classes/CanvasMaskManager.html">CanvasMaskManager</a></li>
<li><a href="../classes/CanvasRenderer.html">CanvasRenderer</a></li>
<li><a href="../classes/CanvasTinter.html">CanvasTinter</a></li>
<li><a href="../classes/Circle.html">Circle</a></li>
<li><a href="../classes/ColorMatrixFilter.html">ColorMatrixFilter</a></li>
<li><a href="../classes/ColorStepFilter.html">ColorStepFilter</a></li>
<li><a href="../classes/ComplexPrimitiveShader.html">ComplexPrimitiveShader</a></li>
<li><a href="../classes/ConvolutionFilter.html">ConvolutionFilter</a></li>
<li><a href="../classes/CrossHatchFilter.html">CrossHatchFilter</a></li>
<li><a href="../classes/DisplacementFilter.html">DisplacementFilter</a></li>
<li><a href="../classes/DisplayObject.html">DisplayObject</a></li>
<li><a href="../classes/DisplayObjectContainer.html">DisplayObjectContainer</a></li>
<li><a href="../classes/DotScreenFilter.html">DotScreenFilter</a></li>
<li><a href="../classes/Ellipse.html">Ellipse</a></li>
<li><a href="../classes/Event.html">Event</a></li>
<li><a href="../classes/EventTarget.html">EventTarget</a></li>
<li><a href="../classes/FilterBlock.html">FilterBlock</a></li>
<li><a href="../classes/FilterTexture.html">FilterTexture</a></li>
<li><a href="../classes/Graphics.html">Graphics</a></li>
<li><a href="../classes/GraphicsData.html">GraphicsData</a></li>
<li><a href="../classes/GrayFilter.html">GrayFilter</a></li>
<li><a href="../classes/ImageLoader.html">ImageLoader</a></li>
<li><a href="../classes/InteractionData.html">InteractionData</a></li>
<li><a href="../classes/InteractionManager.html">InteractionManager</a></li>
<li><a href="../classes/InvertFilter.html">InvertFilter</a></li>
<li><a href="../classes/JsonLoader.html">JsonLoader</a></li>
<li><a href="../classes/Matrix.html">Matrix</a></li>
<li><a href="../classes/MovieClip.html">MovieClip</a></li>
<li><a href="../classes/NoiseFilter.html">NoiseFilter</a></li>
<li><a href="../classes/NormalMapFilter.html">NormalMapFilter</a></li>
<li><a href="../classes/PixelateFilter.html">PixelateFilter</a></li>
<li><a href="../classes/PixiFastShader.html">PixiFastShader</a></li>
<li><a href="../classes/PixiShader.html">PixiShader</a></li>
<li><a href="../classes/Point.html">Point</a></li>
<li><a href="../classes/Polygon.html">Polygon</a></li>
<li><a href="../classes/PolyK.html">PolyK</a></li>
<li><a href="../classes/PrimitiveShader.html">PrimitiveShader</a></li>
<li><a href="../classes/Rectangle.html">Rectangle</a></li>
<li><a href="../classes/RenderTexture.html">RenderTexture</a></li>
<li><a href="../classes/RGBSplitFilter.html">RGBSplitFilter</a></li>
<li><a href="../classes/Rope.html">Rope</a></li>
<li><a href="../classes/Rounded Rectangle.html">Rounded Rectangle</a></li>
<li><a href="../classes/SepiaFilter.html">SepiaFilter</a></li>
<li><a href="../classes/SmartBlurFilter.html">SmartBlurFilter</a></li>
<li><a href="../classes/Spine.html">Spine</a></li>
<li><a href="../classes/SpineLoader.html">SpineLoader</a></li>
<li><a href="../classes/Sprite.html">Sprite</a></li>
<li><a href="../classes/SpriteBatch.html">SpriteBatch</a></li>
<li><a href="../classes/SpriteSheetLoader.html">SpriteSheetLoader</a></li>
<li><a href="../classes/Stage.html">Stage</a></li>
<li><a href="../classes/Strip.html">Strip</a></li>
<li><a href="../classes/StripShader.html">StripShader</a></li>
<li><a href="../classes/Text.html">Text</a></li>
<li><a href="../classes/Texture.html">Texture</a></li>
<li><a href="../classes/TilingSprite.html">TilingSprite</a></li>
<li><a href="../classes/TiltShiftFilter.html">TiltShiftFilter</a></li>
<li><a href="../classes/TiltShiftXFilter.html">TiltShiftXFilter</a></li>
<li><a href="../classes/TiltShiftYFilter.html">TiltShiftYFilter</a></li>
<li><a href="../classes/TwistFilter.html">TwistFilter</a></li>
<li><a href="../classes/WebGLBlendModeManager.html">WebGLBlendModeManager</a></li>
<li><a href="../classes/WebGLFastSpriteBatch.html">WebGLFastSpriteBatch</a></li>
<li><a href="../classes/WebGLFilterManager.html">WebGLFilterManager</a></li>
<li><a href="../classes/WebGLGraphics.html">WebGLGraphics</a></li>
<li><a href="../classes/WebGLGraphicsData.html">WebGLGraphicsData</a></li>
<li><a href="../classes/WebGLMaskManager.html">WebGLMaskManager</a></li>
<li><a href="../classes/WebGLRenderer.html">WebGLRenderer</a></li>
<li><a href="../classes/WebGLShaderManager.html">WebGLShaderManager</a></li>
<li><a href="../classes/WebGLSpriteBatch.html">WebGLSpriteBatch</a></li>
<li><a href="../classes/WebGLStencilManager.html">WebGLStencilManager</a></li>
</ul>
<ul id="api-modules" class="apis modules">
<li><a href="../modules/PIXI.html">PIXI</a></li>
</ul>
</div>
</div>
</div>
</div>
</div>
<div class="yui3-u-3-4">
<div id="api-options">
Show:
<label for="api-show-inherited">
<input type="checkbox" id="api-show-inherited" checked>
Inherited
</label>
<label for="api-show-protected">
<input type="checkbox" id="api-show-protected">
Protected
</label>
<label for="api-show-private">
<input type="checkbox" id="api-show-private">
Private
</label>
<label for="api-show-deprecated">
<input type="checkbox" id="api-show-deprecated">
Deprecated
</label>
</div>
<div class="apidocs">
<div id="docs-main">
<div class="content">
<h1 class="file-heading">File: src/pixi/utils/EventTarget.js</h1>
<div class="file">
<pre class="code prettyprint linenums">
/**
* @author Mat Groves http://matgroves.com/ @Doormat23
* @author Chad Engler https://github.com/englercj @Rolnaaba
*/
/**
* Originally based on https://github.com/mrdoob/eventtarget.js/ from mr Doob.
* Currently takes inspiration from the nodejs EventEmitter, EventEmitter3, and smokesignals
*/
/**
* Mixins event emitter functionality to a class
*
* @class EventTarget
* @example
* function MyEmitter() {}
*
* PIXI.EventTarget.mixin(MyEmitter.prototype);
*
* var em = new MyEmitter();
* em.emit('eventName', 'some data', 'some more data', {}, null, ...);
*/
PIXI.EventTarget = {
/**
* Backward compat from when this used to be a function
*/
call: function callCompat(obj) {
if(obj) {
obj = obj.prototype || obj;
PIXI.EventTarget.mixin(obj);
}
},
/**
* Mixes in the properties of the EventTarget prototype onto another object
*
* @method mixin
* @param object {Object} The obj to mix into
*/
mixin: function mixin(obj) {
/**
* Return a list of assigned event listeners.
*
* @method listeners
* @param eventName {String} The events that should be listed.
* @returns {Array} An array of listener functions
*/
obj.listeners = function listeners(eventName) {
this._listeners = this._listeners || {};
return this._listeners[eventName] ? this._listeners[eventName].slice() : [];
};
/**
* Emit an event to all registered event listeners.
*
* @method emit
* @alias dispatchEvent
* @param eventName {String} The name of the event.
* @returns {Boolean} Indication if we've emitted an event.
*/
obj.emit = obj.dispatchEvent = function emit(eventName, data) {
this._listeners = this._listeners || {};
//backwards compat with old method ".emit({ type: 'something' })"
if(typeof eventName === 'object') {
data = eventName;
eventName = eventName.type;
}
//ensure we are using a real pixi event
if(!data || data.__isEventObject !== true) {
data = new PIXI.Event(this, eventName, data);
}
//iterate the listeners
if(this._listeners && this._listeners[eventName]) {
var listeners = this._listeners[eventName].slice(0),
length = listeners.length,
fn = listeners[0],
i;
for(i = 0; i < length; fn = listeners[++i]) {
//call the event listener
fn.call(this, data);
//if "stopImmediatePropagation" is called, stop calling sibling events
if(data.stoppedImmediate) {
return this;
}
}
//if "stopPropagation" is called then don't bubble the event
if(data.stopped) {
return this;
}
}
//bubble this event up the scene graph
if(this.parent && this.parent.emit) {
this.parent.emit.call(this.parent, eventName, data);
}
return this;
};
/**
* Register a new EventListener for the given event.
*
* @method on
* @alias addEventListener
* @param eventName {String} Name of the event.
* @param callback {Functon} fn Callback function.
*/
obj.on = obj.addEventListener = function on(eventName, fn) {
this._listeners = this._listeners || {};
(this._listeners[eventName] = this._listeners[eventName] || [])
.push(fn);
return this;
};
/**
* Add an EventListener that's only called once.
*
* @method once
* @param eventName {String} Name of the event.
* @param callback {Function} Callback function.
*/
obj.once = function once(eventName, fn) {
this._listeners = this._listeners || {};
var self = this;
function onceHandlerWrapper() {
fn.apply(self.off(eventName, onceHandlerWrapper), arguments);
}
onceHandlerWrapper._originalHandler = fn;
return this.on(eventName, onceHandlerWrapper);
};
/**
* Remove event listeners.
*
* @method off
* @alias removeEventListener
* @param eventName {String} The event we want to remove.
* @param callback {Function} The listener that we need to find.
*/
obj.off = obj.removeEventListener = function off(eventName, fn) {
this._listeners = this._listeners || {};
if(!this._listeners[eventName])
return this;
var list = this._listeners[eventName],
i = fn ? list.length : 0;
while(i-- > 0) {
if(list[i] === fn || list[i]._originalHandler === fn) {
list.splice(i, 1);
}
}
if(list.length === 0) {
delete this._listeners[eventName];
}
return this;
};
/**
* Remove all listeners or only the listeners for the specified event.
*
* @method removeAllListeners
* @param eventName {String} The event you want to remove all listeners for.
*/
obj.removeAllListeners = function removeAllListeners(eventName) {
this._listeners = this._listeners || {};
if(!this._listeners[eventName])
return this;
delete this._listeners[eventName];
return this;
};
}
};
/**
* Creates an homogenous object for tracking events so users can know what to expect.
*
* @class Event
* @extends Object
* @constructor
* @param target {Object} The target object that the event is called on
* @param name {String} The string name of the event that was triggered
* @param data {Object} Arbitrary event data to pass along
*/
PIXI.Event = function(target, name, data) {
//for duck typing in the ".on()" function
this.__isEventObject = true;
/**
* Tracks the state of bubbling propagation. Do not
* set this directly, instead use `event.stopPropagation()`
*
* @property stopped
* @type Boolean
* @private
* @readOnly
*/
this.stopped = false;
/**
* Tracks the state of sibling listener propagation. Do not
* set this directly, instead use `event.stopImmediatePropagation()`
*
* @property stoppedImmediate
* @type Boolean
* @private
* @readOnly
*/
this.stoppedImmediate = false;
/**
* The original target the event triggered on.
*
* @property target
* @type Object
* @readOnly
*/
this.target = target;
/**
* The string name of the event that this represents.
*
* @property type
* @type String
* @readOnly
*/
this.type = name;
/**
* The data that was passed in with this event.
*
* @property data
* @type Object
* @readOnly
*/
this.data = data;
//backwards compat with older version of events
this.content = data;
/**
* The timestamp when the event occurred.
*
* @property timeStamp
* @type Number
* @readOnly
*/
this.timeStamp = Date.now();
};
/**
* Stops the propagation of events up the scene graph (prevents bubbling).
*
* @method stopPropagation
*/
PIXI.Event.prototype.stopPropagation = function stopPropagation() {
this.stopped = true;
};
/**
* Stops the propagation of events to sibling listeners (no longer calls any listeners).
*
* @method stopImmediatePropagation
*/
PIXI.Event.prototype.stopImmediatePropagation = function stopImmediatePropagation() {
this.stoppedImmediate = true;
};
</pre>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<script src="../assets/vendor/prettify/prettify-min.js"></script>
<script>prettyPrint();</script>
<script src="../assets/js/yui-prettify.js"></script>
<script src="../assets/../api.js"></script>
<script src="../assets/js/api-filter.js"></script>
<script src="../assets/js/api-list.js"></script>
<script src="../assets/js/api-search.js"></script>
<script src="../assets/js/apidocs.js"></script>
</body>
</html>
