MACROMEDIA FLEX - DEVELOPING COMPONENTS AND THEMES User Manual download pdf (Page 22)

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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MACROMEDIA FLEX - DEVELOPING COMPONENTS AND THEMES User Manual Page 22