     /**
      *  @private
      */
-	private var _keepDown:Boolean = false;
+    private var _keepDown:Boolean = false;
     
     /**
      *  @private

    private function addSystemMouseHandlers():void
    {
        systemManager.getSandboxRoot().addEventListener(
			MouseEvent.MOUSE_UP, mouseEventHandler, true /* useCapture */);

        systemManager.getSandboxRoot().addEventListener(
			SandboxMouseEvent.MOUSE_UP_SOMEWHERE, mouseEventHandler);             
    }

    /**

    private function removeSystemMouseHandlers():void
    {
        systemManager.getSandboxRoot().removeEventListener(
            MouseEvent.MOUSE_UP, mouseEventHandler, true /* useCapture */);

        systemManager.getSandboxRoot().removeEventListener(
            SandboxMouseEvent.MOUSE_UP_SOMEWHERE, mouseEventHandler);
    }
    
    /**
