Set Qt::SubWindow on windows embedded by QWidget::createWindowContainer

The embedded window is parented into the containing QWindowContainer
widget, which may either have a window handle itself, or is a child
of a widget that has one (typically the top level).

By setting Qt::SubWindow we inform clients about the embedded window's
place in the world, allowing e.g. QPlatformIntegration::defaultWindowState
to choose the correct state (Qt::WindowNoState) for the window instead of
making it Qt::WindowMaximized on iOS.

Change-Id: Icf834192d99fee455aaba3c57bee1a4f1fde5025
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
(cherry picked from commit 296621a52f220dfd5456f6fb936f513a7b85b1af)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

0 files changed, 0 insertions, 0 deletions