Fixed mouse wheel delta on Windows

libsdl-org · Feb 12, 2013 · 370c5aa · 370c5aa
1 parent d7d163f
commit 370c5aa
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/video/windows/SDL_windowsevents.c b/src/video/windows/SDL_windowsevents.c
@@ -291,7 +291,8 @@ WIN_WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 
     case WM_MOUSEWHEEL:
         {
-            int motion = (short) HIWORD(wParam);
+            // FIXME: This may need to accumulate deltas up to WHEEL_DELTA
+            short motion = GET_WHEEL_DELTA_WPARAM(wParam) / WHEEL_DELTA;
 
             SDL_SendMouseWheel(data->window, 0, motion);
             break;