libsdl1.2: problem looking up keysyms under X11

[Sam Hocevar]

On Thu, Mar 17, 2005, Jochen Voss wrote:

> the SDL-library does not properly lookup keysyms under X11.  Each key
> has a list of four keysyms assigned to it, which are interpreted as
> "group 1 without shift", "group 1 with shift", "group 2 without
> shift", and "group 2 with shift".  The SDL library only uses the first
> element of this array.  This makes it impossible to use keysyms from
> group 2 (i.e. keysyms accessed using the altgr modifier).
> 
> The problem is in the file src/video/x11/SDL_x11events.c, line 621:
> 
>     xsym = XKeycodeToKeysym(display, kc, 0);
> 
> The "0" is the index into the above mentioned list and thus we get
> always the first keysym.

   I applied your patch but I am now reverting it. Keysyms are supposed
to represent physycal keys, so that SDL_GetKeyState() works. If you need
the AltGr-combined keys, you should probably have a look at the .unicode
member of the structure. Similarly, any program that relies on the user
pressing the SDLK_2 key is broken, because on many keyboards there is no
such thing as the "2" key.

   Let me know what you think.

-- 
Sam.