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-rw-r--r--src/widgets/kernel/qwidget.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/widgets/kernel/qwidget.cpp b/src/widgets/kernel/qwidget.cpp
index 759821a057..d35ad87c8d 100644
--- a/src/widgets/kernel/qwidget.cpp
+++ b/src/widgets/kernel/qwidget.cpp
@@ -1483,6 +1483,8 @@ void QWidgetPrivate::create_sys(WId window, bool initializeWindow, bool destroyO
win->handle()->setFrameStrutEventsEnabled(true);
data.window_flags = win->flags();
+ if (!win->isTopLevel()) // In a Widget world foreign windows can only be top level
+ data.window_flags &= ~Qt::ForeignWindow;
if (!topData()->role.isNull())
QXcbWindowFunctions::setWmWindowRole(win, topData()->role.toLatin1());