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ui/sdl: Fix handling of caps lock and num lock keys 

Starting with SDL version 1.2.14, caps lock and num lock keys
will send a SDL_KEYUP when SDL_DISABLE_LOCK_KEYS=1 is set in
the environment.

The new code sets the environment unconditionally
(it won't harm old versions which do not know it).

The workaround for SDL_KEYUP is only compiled with old SDL versions.

A similar patch without handling of old SDL versions was already
published by Benjamin Drung for Ubuntu.

Cc: Anthony Liguori <aliguori@us.ibm.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Benjamin Drung <benjamin.drung@gmail.com>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
(cherry picked from commit 4e79bcbb96)
This commit is contained in:
Stefan Weil 2011-02-03 22:35:07 +01:00 committed by Anthony Liguori
parent 366c2452b1
commit 9a121a2fbf
1 changed files with 8 additions and 0 deletions
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8
ui/sdl.c
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@ -388,12 +388,16 @@ static void sdl_process_key(SDL_KeyboardEvent *ev)
else else
modifiers_state[keycode] = 1; modifiers_state[keycode] = 1;
break; break;
#define QEMU_SDL_VERSION ((SDL_MAJOR_VERSION << 8) + SDL_MINOR_VERSION)
#if QEMU_SDL_VERSION < 0x102 || QEMU_SDL_VERSION == 0x102 && SDL_PATCHLEVEL < 14
/* SDL versions before 1.2.14 don't support key up for caps/num lock. */
case 0x45: /* num lock */ case 0x45: /* num lock */
case 0x3a: /* caps lock */ case 0x3a: /* caps lock */
/* SDL does not send the key up event, so we generate it */ /* SDL does not send the key up event, so we generate it */
kbd_put_keycode(keycode); kbd_put_keycode(keycode);
kbd_put_keycode(keycode | SCANCODE_UP); kbd_put_keycode(keycode | SCANCODE_UP);
return; return;
#endif
} }
/* now send the key code */ /* now send the key code */
@ -831,6 +835,10 @@ void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
setenv("SDL_VIDEO_ALLOW_SCREENSAVER", "1", 0); setenv("SDL_VIDEO_ALLOW_SCREENSAVER", "1", 0);
} }
/* Enable normal up/down events for Caps-Lock and Num-Lock keys.
* This requires SDL >= 1.2.14. */
setenv("SDL_DISABLE_LOCK_KEYS", "1", 1);
flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE; flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
if (SDL_Init (flags)) { if (SDL_Init (flags)) {
fprintf(stderr, "Could not initialize SDL(%s) - exiting\n", fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",