In a Flex Mobile App, my Application component handles states like portrait/landscape ios/android and phone/tablet in groups. In my View I want to include a button if the main App has one specific state of these. I don't want any View to check portroit/landscape and stuff again to set as own state. On the other hand the views states are required for other things. So how can I say include the button in my view only if the state of the topLevelApplication is landscape e.g.?