GestureBase.as

package org.tiny.tlf.interaction.gestures
{
  import flash.events.Event;
  import flash.events.IEventDispatcher;
  
  import org.tiny.tlf.events.GestureEvent;
  
  public class GestureBase implements IGesture
  {
    public function GestureBase()
    {
    }
    
    protected var state:XML = <_/>;
    protected var currentState:XML;
    
    protected var behaviors:Vector.<IEventDispatcher> = new Vector.<IEventDispatcher>();
    
    public function addBehavior(behavior:IEventDispatcher):void
    {
      if(behaviors.indexOf(behavior) < 0)
        behaviors.push(behavior);
    }
    
    public function execute(event:Event):void
    {
      currentState = currentState.children().length() > 0 ? currentState[0] : state;
      var funcName:String = currentState.localName().toString();
      
      if(funcName in this)
      {
        var result:Boolean = (this[funcName] as Function).apply(this, event);
        if(result)
        {
          if(currentState.children().length() == 0)
            notifyBehaviors(event);
        }
        else
          currentState = state;
      }
    }
    
    protected function notifyBehaviors(event:Event):void
    {
      var n:int = behaviors.length;
      for(var i:int = 0; i < n; i++)
        behaviors[i].dispatchEvent(new GestureEvent(GestureEvent.ACTIVATED, event));
    }
  }
}