[Interest] Qt::Popup prevents WM_NCHITTEST to reach the window

[Philipp Kursawe]

I have QDialog with
setWindowFlags(Qt::Popup | Qt::FramelessWindowHint);

and it displays just fine (with shadow and all).
However my nativeEvent handler is never called with the WM_NCHITTEST
message. It is called with WM_LBUTTONDOWN and others. When I replace
Qt::Popup with Qt::Dialog the WM_NCHITTEST messages are sent to my event
handler. However the dialog then loses the "ligh dismiss" functionality and
its shadow.

What's going on here?
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