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win32: Pass through non-left mouse button presses when over draggable areas 

Returning anything other an HTCLIENT result will cause windows to eat the button press, so ensure that non-left presses are passed through to the client over draggable areas.
This commit is contained in:
Frank Praznik 2025-01-15 14:45:48 -05:00
parent 84d35587ee
commit dd0bdc2561
1 changed files with 12 additions and 0 deletions
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12
src/video/windows/SDL_windowsevents.c
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@ -2072,7 +2072,19 @@ LRESULT CALLBACK WIN_WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lPara
return ret; \ return ret; \
} }
case SDL_HITTEST_DRAGGABLE: case SDL_HITTEST_DRAGGABLE:
{
/* If the mouse button state is something other than none or left button down,
* return HTCLIENT, or Windows will eat the button press.
*/
SDL_MouseButtonFlags buttonState = SDL_GetGlobalMouseState(NULL, NULL);
if (buttonState && !(buttonState & SDL_BUTTON_LMASK)) {
// Set focus in case it was lost while previously moving over a draggable area.
SDL_SetMouseFocus(window);
return HTCLIENT;
}
POST_HIT_TEST(HTCAPTION); POST_HIT_TEST(HTCAPTION);
}
case SDL_HITTEST_RESIZE_TOPLEFT: case SDL_HITTEST_RESIZE_TOPLEFT:
POST_HIT_TEST(HTTOPLEFT); POST_HIT_TEST(HTTOPLEFT);
case SDL_HITTEST_RESIZE_TOP: case SDL_HITTEST_RESIZE_TOP: