diff options
| -rw-r--r-- | ui/cocoa.m | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/ui/cocoa.m b/ui/cocoa.m index 2991ed4f19..cfc70e21a4 100644 --- a/ui/cocoa.m +++ b/ui/cocoa.m @@ -802,14 +802,20 @@ QemuCocoaView *cocoaView; * This is in-line with standard Mac OS X UI behaviour. */ + /* + * When deltaY is zero, it means that this scrolling event was + * either horizontal, or so fine that it only appears in + * scrollingDeltaY. So we drop the event. + */ + if ([event deltaY] != 0) { /* Determine if this is a scroll up or scroll down event */ - buttons = ([event scrollingDeltaY] > 0) ? - INPUT_BUTTON_WHEEL_UP : INPUT_BUTTON_WHEEL_DOWN; - qemu_input_queue_btn(dcl->con, buttons, true); - qemu_input_event_sync(); - qemu_input_queue_btn(dcl->con, buttons, false); - qemu_input_event_sync(); - + buttons = ([event deltaY] > 0) ? + INPUT_BUTTON_WHEEL_UP : INPUT_BUTTON_WHEEL_DOWN; + qemu_input_queue_btn(dcl->con, buttons, true); + qemu_input_event_sync(); + qemu_input_queue_btn(dcl->con, buttons, false); + qemu_input_event_sync(); + } /* * Since deltaY also reports scroll wheel events we prevent mouse * movement code from executing. |