<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/02/22/detecting-when-a-mouse-leaves-a-flex-application/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
		layout="vertical"
		verticalAlign="top"
		backgroundColor="white"
		applicationComplete="init();" viewSourceURL="srcview/index.html">

	<mx:Style>
		Alert {
			modalTransparencyColor: black;
			modalTransparency: 0.6;
		}
	</mx:Style>

	<mx:Script>
		<![CDATA[
			import mx.controls.Alert;
			import mx.managers.PopUpManager;

			private var _isMouseInSWF:Boolean = false;
			private var alert:Alert;

			[Bindable]
			private function get isMouseInSWF():Boolean {
				return _isMouseInSWF;
			}

			private function set isMouseInSWF(value:Boolean):void {
				_isMouseInSWF = value;
			}

			private function init():void {
				stage.addEventListener(MouseEvent.MOUSE_MOVE, stage_mouseMove);
				stage.addEventListener(Event.MOUSE_LEAVE, stage_mouseLeave);
			}

			private function stage_mouseLeave(evt:Event):void {
				isMouseInSWF = false;
				if (alert) {
					PopUpManager.removePopUp(alert);
				}
				alert = Alert.show("GONE");
			}

			private function stage_mouseMove(evt:MouseEvent):void {
				if (!isMouseInSWF) {
					if (alert) {
						PopUpManager.removePopUp(alert);
					}
					// alert = Alert.show("BACK");
					isMouseInSWF = true;
				}
			}
		]]>
	</mx:Script>

	<mx:Label text="isMouseInSWF: {isMouseInSWF}" />

</mx:Application>