/**
 * @author Paul Brooks Andrus
 * Creative Commons License
 * http://creativecommons.org/licenses/by/2.5/
 * This work is licensed under a Creative Commons Attribution 2.5 License
 * June 6, 2005
 */
 
import mx.events.EventDispatcher;
import mx.utils.Delegate;
 
class Watcher {

	function dispatchEvent(){};
	function addEventListener(){};
	function removeEventListener(){};
	 
	function Watcher() {
		EventDispatcher.initialize(this);
	}	
	/*
	 * Creates a watched property using the scope of the first parameter
	 *
	*/
	public function watchProp(scope:Object, prop:String):Void {
		scope.watch(prop, Delegate.create(this,returnProperty), scope);
	}
	
	
	/*
	 * Removes the watch from the scope defined by the 4th parameter, returns 
	 * the new value of the watched property and dispatches an event object 
	 * with all the information from the watch
	 * 
	*/	
	public function returnProperty(prop:String, oldVal:String, newVal:String, scope:Object) {
		scope.unwatch(prop);
		dispatchEvent({type:"change", property:prop,value:newVal,oldValue:oldVal});		
		return newVal;
	}
			
}