[racket] Detecting application-wide keyboard presses (without open frame or dialog)

For modifier keys, at least, you can use `get-current-mouse-state'
(added in 5.3.1.x).

At Sun, 6 Jan 2013 17:11:52 +0000, Erich Rast wrote:
> Hi everybody,
> 
> Is there a cross-platform way to detect a keyboard press, including
> command keys, without opening any frame? Something like get-key-press
> from the graphics legacy library but without viewport?
> 
> I'd need this for detecting a key combination before the application's
> main frame opens in order to reset the window to it's default state.
> In my application windows remember their position and settings but the
> user should be able to revert these settings to their defaults by
> pressing a combination like shift-meta when launching the application.
> 
> Best,
> 
> Erich
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