Currently the internal flags of QWindow are not up-to-date when querying
them during QWindowsWindow::setFlags with QWindow::flags(). QWindow
updates its flags after QWindowsWindow returns from setFlags. This patch
adds a getter, to query the updated internal state of
Qt::FrameLessWindowHint flag from QWindowsWindow's m_data.flags.
This is needed due to QWindowsWindow is calling SetWindowPos, which
immediately enters the WndProc without access to the newly set flags.
Pick-to: 6.7
Change-Id: I826f29ef608d1e0a4b416e123aa4116587a035a7
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
(cherry picked from commit 0e6907d2f0e95a8892df55e075837cc0e81e0f3f)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
e9ba7b7660