StageEventProxy

/*
    CASA Framework for ActionScript 3.0
    Copyright (c) 2011, Contributors of CASA Framework
    All rights reserved.
    
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      may be used to endorse or promote products derived from this software
      without specific prior written permission.
    
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    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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    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 org.casalib.core.Destroyable;
    import org.casalib.events.ListenerManager;
    import org.casalib.events.IRemovableEventDispatcher;
    import org.casalib.util.StageReference;
    import flash.display.Stage;
    import flash.events.Event;
    
    
    /**
        Created an event proxy between the Stage that implements {@link IRemovableEventDispatcher} and {@link IDestroyable}.
        
        @author Aaron Clinger
        @version 03/31/10
        @usageNote You must first initialize {@link StageReference} before using this class.
        @example
            
                package {
                    import flash.events.KeyboardEvent;
                    import org.casalib.display.CasaMovieClip;
                    import org.casalib.events.StageEventProxy;
                    import org.casalib.util.StageReference;
                    
                    
                    public class MyExample extends CasaMovieClip {
                        protected var _stageEventProxy:StageEventProxy;
                        
                        
                        public function MyExample() {
                            super();
                            
                            StageReference.setStage(this.stage);
                            
                            this._stageEventProxy = new StageEventProxy();
                            this._stageEventProxy.addEventListener(KeyboardEvent.KEY_DOWN, this._onKeyDown);
                            this._stageEventProxy.addEventListener(KeyboardEvent.KEY_UP, this._onKeyUp);
                        }
                        
                        protected function _onKeyDown(e:KeyboardEvent):void {
                            trace("Key down " + e.keyCode);
                            
                            if (e.keyCode == 65) {
                                trace("a key pressed!");
                                
                                this._stageEventProxy.removeEventListeners();
                            }
                        }
                        
                        protected function _onKeyUp(e:KeyboardEvent):void {
                            trace("Key up " + e.keyCode);
                        }
                    }
                }
            
    */
    public class StageEventProxy extends Destroyable implements IRemovableEventDispatcher {
        public static const STAGE_DEFAULT:String = 'stageDefault';
        protected var _listenerManager:ListenerManager;
        protected var _stage:Stage;
        
        
        /**
            Created a new StageEventProxy.
            
            @param stageId: An identifier that corresponds to a stored Stage in {@link StageReference}.
            @usageNote You must first initialize {@link StageReference} before using this class.
        */
        public function StageEventProxy(stageId:String = StageEventProxy.STAGE_DEFAULT) {
            super();
            
            this._stage           = StageReference.getStage(stageId);
            this._listenerManager = ListenerManager.getManager(this._stage);
        }
        
        /**
            @see "IEventDispatcher documention for this method."
        */
        public function dispatchEvent(event:Event):Boolean {
            if (this._stage.willTrigger(event.type))
                return this._stage.dispatchEvent(event);
            
            return true;
        }
        
        /**
            @see "IEventDispatcher documention for this method."
        */
        public function addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void {
            this._stage.addEventListener(type, listener, useCapture, priority, useWeakReference);
            this._listenerManager.addEventListener(type, listener, useCapture, priority, useWeakReference);
        }
        
        /**
            @see "IEventDispatcher documention for this method."
        */
        public function removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void {
            this._stage.removeEventListener(type, listener, useCapture);
            this._listenerManager.removeEventListener(type, listener, useCapture);
        }
        
        /**
            @see "IEventDispatcher documention for this method."
        */
        public function hasEventListener(type:String):Boolean {
            return this._stage.hasEventListener(type);
        }
        
        /**
            @see "IEventDispatcher documention for this method."
        */
        public function willTrigger(type:String):Boolean {
            return this._stage.willTrigger(type);
        }
        
        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);
        }
        
        override public function destroy():void {
            this._listenerManager.destroy();
            
            super.destroy();
        }
    }
}