Oskar Linde fixed bug #507

Trackpad scrolling on OSX is broken. Scrolling up/slightly right gets translated into a Down event in SDL. The following patch fixes this extremely irritating issue:
libsdl-org · Dec 28, 2007 · 13b3eee · 13b3eee
1 parent fa4acb0
commit 13b3eee
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/src/video/quartz/SDL_QuartzEvents.m b/src/video/quartz/SDL_QuartzEvents.m
@@ -930,10 +930,12 @@ disassociated from the mouse (and therefore
                         Uint8 button;
                         dy = [ event deltaY ];
                         dx = [ event deltaX ];
-                        if ( dy > 0.0 || dx > 0.0 ) /* Scroll up */
+                        if ( dy > 0.0 ) /* Scroll up */
                             button = SDL_BUTTON_WHEELUP;
-                        else /* Scroll down */
+                        else if ( dy < 0.0 ) /* Scroll down */
                             button = SDL_BUTTON_WHEELDOWN;
+                        else
+                            break; /* Horizontal scroll */
                         /* For now, wheel is sent as a quick down+up */
                         SDL_PrivateMouseButton (SDL_PRESSED, button, 0, 0);
                         SDL_PrivateMouseButton (SDL_RELEASED, button, 0, 0);