Hello,

imagine an application composed of a nested hierarchy of Components,
ViewStacks, View States, Navigators, etc.
How can a component on the bottom of the hierarchy run a function
every time he is shown to the user? 

The show event is only dispatched when the component visibility
changes to true. If we are changing the component's parent visibility,
the component might not be visible on screen, but the event is never
dispatched. So, this means that a component never knows if it is being
shown to the user or not (really visible!).

This is a huge problem, since until now I wasn't able to find a clean
an unobtrusive solution. 

Is there a best-practice for solving this problem? 

Thanks,

João Saleiro



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