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Need to make sure of two things before handling the mousewheel message:

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- There must be a window under the pointer
- It must be one of our windows

This fixes bug 33181.  r=valeski.
This commit is contained in:
bryner%uiuc.edu 2000-03-26 01:02:31 +00:00
parent aa651546d8
commit a432077333
1 changed files with 13 additions and 1 deletions
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14
widget/src/windows/nsWindow.cpp
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@ -2573,7 +2573,19 @@ PRBool nsWindow::ProcessMessage(UINT msg, WPARAM wParam, LPARAM lParam, LRESULT
point.y = (short) HIWORD(lParam);
HWND destWnd = ::WindowFromPoint(point);
if (destWnd != mWnd) {
// Since we receive mousewheel events for as long as
// we are focused, it's entirely possible that there
// is another app's window or no window under the
// pointer.
if (!destWnd) // No window is under the pointer
break;
LONG proc = ::GetWindowLong(destWnd, GWL_WNDPROC);
if (proc != (LONG)&nsWindow::WindowProc) // Some other app
break;
else if (destWnd != mWnd) {
nsWindow* destWindow = (nsWindow*) ::GetWindowLong(destWnd, GWL_USERDATA);
if (destWindow)
return destWindow->ProcessMessage(msg, wParam, lParam, aRetValue);