RemovableEventDispatcher

/*
    CASA Lib for ActionScript 3.0
    Copyright (c) 2011, Aaron Clinger & Contributors of CASA Lib
    All rights reserved.
    
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    modification, are permitted provided that the following conditions are met:
    
    - Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.
    
    - Redistributions in binary form must reproduce the above copyright notice,
      this list of conditions and the following disclaimer in the documentation
      and/or other materials provided with the distribution.
    
    - Neither the name of the CASA Lib nor the names of its contributors
      may be used to endorse or promote products derived from this software
      without specific prior written permission.
    
    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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*/
package org.casalib.events {
    import flash.events.Event;
    import flash.events.EventDispatcher;
    import flash.events.IEventDispatcher;
    import org.casalib.events.IRemovableEventDispatcher;
    import org.casalib.events.ListenerManager;
    import org.casalib.core.IDestroyable;
    
    
    /**
        Extends EventDispatcher to allow for simple and quick removal of event listeners.
        
        @author Aaron Clinger
        @version 02/11/10
    */
    public class RemovableEventDispatcher extends EventDispatcher implements IRemovableEventDispatcher, IDestroyable {
        protected var _listenerManager:ListenerManager;
        protected var _isDestroyed:Boolean;
        
        
        /**
            Creates a new RemovableEventDispatcher.
            
            @param target: The target object for events dispatched to the EventDispatcher object.
        */
        public function RemovableEventDispatcher(target:IEventDispatcher = null) {
            super(target);
            
            this._listenerManager = ListenerManager.getManager(this);
        }
        
        /**
            @exclude
        */
        override public function dispatchEvent(event:Event):Boolean {
            if (this.willTrigger(event.type))
                return super.dispatchEvent(event);
            
            return true;
        }
        
        /**
            @exclude
        */
        override public function addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void {
            super.addEventListener(type, listener, useCapture, priority, useWeakReference);
            this._listenerManager.addEventListener(type, listener, useCapture, priority, useWeakReference);
        }
        
        /**
            @exclude
        */
        override public function removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void {
            super.removeEventListener(type, listener, useCapture);
            this._listenerManager.removeEventListener(type, listener, useCapture);
        }
        
        public function removeEventsForType(type:String):void {
            this._listenerManager.removeEventsForType(type);
        }
        
        public function removeEventsForListener(listener:Function):void {
            this._listenerManager.removeEventsForListener(listener);
        }
        
        public function removeEventListeners():void {
            this._listenerManager.removeEventListeners();
        }
        
        public function getTotalEventListeners(type:String = null):uint {
            return this._listenerManager.getTotalEventListeners(type);
        }
        
        public function get destroyed():Boolean {
            return this._isDestroyed;
        }
        
        public function destroy():void {
            this._listenerManager.destroy();
            
            this._isDestroyed = true;
        }
    }
}