diff options
Diffstat (limited to 'dom/events/EventStateManager.cpp')
| -rw-r--r-- | dom/events/EventStateManager.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/dom/events/EventStateManager.cpp b/dom/events/EventStateManager.cpp index 7bbfe21b7..e16d68c81 100644 --- a/dom/events/EventStateManager.cpp +++ b/dom/events/EventStateManager.cpp @@ -3240,6 +3240,12 @@ EventStateManager::PostHandleEvent(nsPresContext* aPresContext, action = WheelPrefs::GetInstance()->ComputeActionFor(wheelEvent); } switch (action) { + case WheelPrefs::ACTION_HSCROLL: { + // Swap axes and fall through + double deltaX = wheelEvent->mDeltaX; + wheelEvent->mDeltaX = wheelEvent->mDeltaY; + wheelEvent->mDeltaY = deltaX; + } case WheelPrefs::ACTION_SCROLL: { // For scrolling of default action, we should honor the mouse wheel // transaction. |