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Bug 501379 - Wheel scroll bustage fix for bug 478245. r=dougt.

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This commit is contained in:
Jim Mathies 2009-06-30 13:19:15 -05:00
parent adfdc27a90
commit af0f5fa236
1 changed files with 11 additions and 3 deletions
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14
widget/src/windows/nsWindow.cpp
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@ -4388,8 +4388,16 @@ PRBool nsWindow::ProcessMessage(UINT msg, WPARAM &wParam, LPARAM &lParam,
#if !defined(WINCE)
case WM_MOUSEWHEEL:
case WM_MOUSEHWHEEL:
if (OnMouseWheel(msg, wParam, lParam, getWheelInfo, result, aRetValue))
return result;
{
// If OnMouseWheel returns true, the event was forwarded directly to another
// mozilla window message handler (ProcessMessage). In this case the return
// value of the forwarded event is in 'result' which we should return immediately.
// If OnMouseWheel returns false, OnMouseWheel processed the event internally.
// 'result' and 'aRetValue' will be set based on what we did with the event, so
// we should fall through.
if (OnMouseWheel(msg, wParam, lParam, getWheelInfo, result, aRetValue))
return result;
}
break;
#endif
@ -5027,7 +5035,7 @@ PRBool nsWindow::OnMouseWheel(UINT msg, WPARAM wParam, LPARAM lParam, PRBool& ge
// But if we process WM_MOUSEHWHEEL, we should return non-zero.
if (result)
result = isVertical ? 0 : TRUE;
*aRetValue = isVertical ? 0 : TRUE;
return PR_FALSE; // break;
}