haiku: Invert mouse wheel values to match what SDL expects.

Partially fixes Bugzilla #4442.
libsdl-org · Nov 12, 2019 · 55b5d8d · 55b5d8d
1 parent b22fb9e
commit 55b5d8d
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/main/haiku/SDL_BApp.h b/src/main/haiku/SDL_BApp.h
@@ -261,7 +261,7 @@ class SDL_BApp : public BApplication {
             return;
         }
         win = GetSDLWindow(winID);
-        SDL_SendMouseWheel(win, 0, xTicks, yTicks, SDL_MOUSEWHEEL_NORMAL);
+        SDL_SendMouseWheel(win, 0, xTicks, -yTicks, SDL_MOUSEWHEEL_NORMAL);
     }
 
     void _HandleKey(BMessage *msg) {