[maemo-developers] Howto grab all Maemo5 zoom key events in SDL/SDL_gles app?

[From: Kimmo Hämäläinen]

On Tue, 2010-05-04 at 16:01 +0200, ext Javier S. Pedro wrote:
> Frantisek Dufka wrote:
> > I am not sure why there are three X windows in info.info.x11 structure
> > (fswindow, wmwindow and window). From brief look into SDL sources it
> > seems to me like the 'window' is  used when SDL is initialized with not
> > owned pre-created window passed to SDL via SDL_WINDOWID variable,
> > otherwise wmwindow and fswindow are used depending of full screen state.
> > In case you are not using SDL_WINDOWID maybe setting wmwindow and
> > fswindow would help you with volume keys?
> 
> WMwindow and FSwindow are containers for "window" (aka gfxwindow) which is
> the one where images are pushed into. On the Fremantle SDL, WMwindow and
> FSwindow are alternatively mapped when changing from windowed to fullscreen
> mode and viceversa -- on a normal SDL, WMwindow is always mapped.

Sounds a bit brain-damaged to have two windows when others do fine with
one... But if it must be so, you need to put the ZOOM_KEY property to
both windows because the topmost counts.

-Kimmo

> Also, 
> gfxdisplay -> window (gfxwindow)
> display -> wmwindow,fswindow
> 
> Else you will get permission errors when you start trying to do more
> complicated things.
>