CasaBitmap

/*
    CASA Lib for ActionScript 3.0
    Copyright (c) 2011, Aaron Clinger & Contributors of CASA Lib
    All rights reserved.
    
    Redistribution and use in source and binary forms, with or without
    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
    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    POSSIBILITY OF SUCH DAMAGE.
*/
package org.casalib.display {
    import flash.display.Bitmap;
    import flash.display.BitmapData;
    import flash.display.Stage;
    import flash.events.Event;
    import org.casalib.core.IDestroyable;
    import org.casalib.events.IRemovableEventDispatcher;
    import org.casalib.events.ListenerManager;
    import org.casalib.util.StageReference;
    
    
    /**
        A base Bitmap that implements {@link IRemovableEventDispatcher} and {@link IDestroyable}.
        
        @author Aaron Clinger
        @version 02/11/10
    */
    public class CasaBitmap extends Bitmap implements IRemovableEventDispatcher, IDestroyable {
        protected var _listenerManager:ListenerManager;
        protected var _isDestroyed:Boolean;
        
        
        /**
            Creates a new CasaBitmap.
            
            @param bitmapData: The BitmapData object being referenced.
            @param pixelSnapping: Whether or not the Bitmap object is snapped to the nearest pixel.
            @param smoothing: Whether or not the bitmap is smoothed when scaled.
        */
        public function CasaBitmap(bitmapData:BitmapData = null, pixelSnapping:String = "auto", smoothing:Boolean = false) {
            super(bitmapData, pixelSnapping, smoothing);
            
            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);
        }
        
        /**
            The Stage of the display object or if the display object is not added to the display list and {@link StageReference} is defined stage will return the {@link StageReference#STAGE_DEFAULT default stage}; otherwise null.
        */
        override public function get stage():Stage {
            if (super.stage == null) {
                try {
                    return StageReference.getStage();
                } catch (e:Error) {}
            }
            
            return super.stage;
        }
        
        public function get destroyed():Boolean {
            return this._isDestroyed;
        }
        
        /**
            {@inheritDoc}
            
            Calling destroy() on a CASA display object also removes it from its current parent.
        */
        public function destroy():void {
            this._listenerManager.destroy();
            
            this._isDestroyed = true;
            
            if (this.parent != null)
                this.parent.removeChild(this);
        }
    }
}