MACROMEDIA FLEX - DEVELOPING COMPONENTS AND THEMES Manual de usuario Pagina 22

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Handling the Back key
private function initializeHandler(event:Event):void!
{!
!systemManager.stage.addEventListener(KeyboardEvent.KEY_DOWN,!
!!deviceKeyDownHandler);!
!systemManager.stage.addEventListener(KeyboardEvent.KEY_UP,!
!!deviceKeyUpHandler);!
}!
private function deviceKeyDownHandler(event:KeyboardEvent):void!
{!
!if (event.keyCode == Keyboard.BACK && mainNavigator.length > 1)!
!!event.preventDefault();!
}!
private function deviceKeyUpHandler(event:KeyboardEvent):void!
{!
!if (event.keyCode == Keyboard.BACK && mainNavigator.length > 1)!
!!mainNavigator.popView();!
}!
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