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windows: Fix GUI key state when grabbing the keyboard 

When our keyboard grab hook is installed, GetKeyState() will return 0 for the
GUI keys even when they are pressed. This leads to spurious key up events when
holding down the GUI keys and the inability to use any key combos involving
those modifier keys.
This commit is contained in:
Cameron Gutman 2021-11-29 22:43:25 +03:00 committed by Sam Lantinga
parent b6bc3a6b0e
commit 715d481271
1 changed files with 13 additions and 6 deletions
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9
src/video/windows/SDL_windowsevents.c
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@ -1476,6 +1476,7 @@ WIN_PumpEvents(_THIS)
MSG msg;
DWORD end_ticks = GetTickCount() + 1;
int new_messages = 0;
SDL_Window *focusWindow;
if (g_WindowsEnableMessageLoop) {
while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
@ -1523,13 +1524,19 @@ WIN_PumpEvents(_THIS)
if ((keystate[SDL_SCANCODE_RSHIFT] == SDL_PRESSED) && !(GetKeyState(VK_RSHIFT) & 0x8000)) {
SDL_SendKeyboardKey(SDL_RELEASED, SDL_SCANCODE_RSHIFT);
}
/* The Windows key state gets lost when using Windows+Space or Windows+G shortcuts */
/* The Windows key state gets lost when using Windows+Space or Windows+G shortcuts and
not grabbing the keyboard. Note: If we *are* grabbing the keyboard, GetKeyState()
will return inaccurate results for VK_LWIN and VK_RWIN but we don't need it anyway. */
focusWindow = SDL_GetKeyboardFocus();
if (!focusWindow || !(focusWindow->flags & SDL_WINDOW_KEYBOARD_GRABBED)) {
if ((keystate[SDL_SCANCODE_LGUI] == SDL_PRESSED) && !(GetKeyState(VK_LWIN) & 0x8000)) {
SDL_SendKeyboardKey(SDL_RELEASED, SDL_SCANCODE_LGUI);
}
if ((keystate[SDL_SCANCODE_RGUI] == SDL_PRESSED) && !(GetKeyState(VK_RWIN) & 0x8000)) {
SDL_SendKeyboardKey(SDL_RELEASED, SDL_SCANCODE_RGUI);
}
}
/* Update the clipping rect in case someone else has stolen it */
WIN_UpdateClipCursorForWindows();