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Volker Hilsheimer c54a5b8380 Introduce QWidget::setScreen
Follows the QWindow semantics, and is a replacement for creating
a QWidget with a QDesktopScreenWidget as the parent.

We can now remove much of the special handling of QDesktopWidget and
the Qt::Desktop window type, and get rid of QDesktopScreenWidget.

Add a manual test that allows local testing. Our CI environments
only have a single screen, and no multi-head display server setup
which is the primary case where QWidget::setScreen is interesting.
For the more common case of a virtual desktop, QWidget::setScreen
has no real impact (just as QWindow::setScreen doesn't).

Change-Id: Id0099e069d316741bacd8c795c396ccad37be297
Fixes: QTBUG-85483
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
2020-08-17 15:08:39 +02:00
.github/workflows GitHub Actions: Fix actions build 2020-08-14 21:40:28 +02:00
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doc Fix return of uninitialized pointer in guiloader example 2020-07-16 21:52:26 +02:00
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qmake Disentangle QIODevice dependencies 2020-08-15 20:55:31 +02:00
src Introduce QWidget::setScreen 2020-08-17 15:08:39 +02:00
tests Introduce QWidget::setScreen 2020-08-17 15:08:39 +02:00
util CMake: Re-implement configure/qmake's command line handling in CMake 2020-08-17 08:08:20 +02:00
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