EventStage

/*
    CASA Framework for ActionScript 2.0
    Copyright (C) 2006  CASA Framework
    http://casaframework.org
    
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.
    
    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.
    
    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/

import org.casaframework.event.EventDispatcher;

/**
    Dispatches stage "onResize" event to observers. Should be used instead of <code>Stage.addListener</code>.
    
    @author Aaron Clinger
    @version 12/20/06
    @example
        <code>
            function onResize(stageWidth:Number, stageHeight:Number):Void {
                trace("Stage resized to " + stageWidth + " wide by " + stageHeight + " tall.");
            }
    
            var stageInstance:EventStage = EventStage.getInstance();
            this.stageInstance.addEventObserver(this, EventStage.EVENT_RESIZE);
        </code>
*/

class org.casaframework.stage.EventStage extends EventDispatcher {
    public static var EVENT_RESIZE:String = 'onResize';
    private static var $stageInstance:EventStage;
    
    /**
        @return {@link EventStage} instance.
    */
    public static function getInstance():EventStage {
        if (EventStage.$stageInstance == undefined) EventStage.$stageInstance = new EventStage(); 
        return EventStage.$stageInstance;
    }
    
    private function EventStage() {
        super();
        
        Stage.addListener(this);
        
        this.$setClassDescription('org.casaframework.stage.EventStage');
    }
    
    /**
        @sends onResize = function(stageWidth:Number, stageHeight:Number) {}
    */
    private function onResize():Void {
        this.dispatchEvent(EventStage.EVENT_RESIZE, Stage.width, Stage.height);
    }
}