When switching windows from fullscreen to maximized, move and resize events are
triggered when changing the window decorations, ending up in
QWindowsWindow::handleResized(), QWindowsWindow::handleMoved() which then may
call handleGeometryChange().
Change 917ef57874 blocks the emission of events
depending on flag WithinSetStyle from handleGeometryChange() for Windows CE.
This has issues which become visible when switching from fullscreen to
maximized repeatedly:
- State change events are still sent from QWindowsWindow::handleResized(),
QWindowsWindow::handleMoved() when changing the window style programmatically
causing the maximized state to be lost after a few cycles(QTBUG-53368).
- Geometry change events are actually needed on the desktop for proper redrawing
(QTBUG-53577).
Make this more fine-grained by suppressing all state changed events while
WithinSetStyle is set and allowing geometry changes.
Amends 917ef57874.
Task-number: QTBUG-53368
Task-number: QTBUG-53577
Change-Id: Icc8dc935cfc29b314aab2d6fac02c97174c79c3e
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
0c415793b9