<![CDATA[Cannot set QDialog modal]]>Running PySide6 under Ubuntu Linux
In my class Dialog(QtDialog) init I call self.setWindowModality(Qt.WindowModal)
and then print(self.windowModality())) which reports: 'WindowModality.WindowModal', but the dialog does NOT stay on top.

I can force modal by checking 'Always on Top' in the panel icon.

What did I miss?

]]>https://forum.qt.io/topic/164963/cannot-set-qdialog-modalRSS for NodeSat, 12 Sep 2026 11:55:09 GMTMon, 03 Aug 2026 11:46:44 GMT60<![CDATA[Reply to Cannot set QDialog modal on Tue, 04 Aug 2026 11:17:28 GMT]]>@oldbrad
So far as I recall, you should have no trouble having a modal dialog on top of all/any other windows in an application, certainly under Xorg if maybe not under Wayland, and without setting Always on Top. But I think your choice of self.setWindowModality(Qt.WindowModal) is wrong, that is looking for one parent to be modal to and you are not passing any. As per https://doc.qt.io/qt-6/qt.html#WindowModality-enum you should use Qt::ApplicationModal if you are not going to set a parent window for it to be modal against.

]]>https://forum.qt.io/post/839518https://forum.qt.io/post/839518Tue, 04 Aug 2026 11:17:28 GMT<![CDATA[Reply to Cannot set QDialog modal on Tue, 04 Aug 2026 09:11:20 GMT]]>@friedemannkleint said in Cannot set QDialog modal:

What Desktop/Windowing system is this?

$ echo $XDG_SESSION_TYPE
x11

But I think your implication is that a Dialog without a parent and cannot go modal over other application windows?

]]>https://forum.qt.io/post/839516https://forum.qt.io/post/839516Tue, 04 Aug 2026 09:11:20 GMT<![CDATA[Reply to Cannot set QDialog modal on Mon, 03 Aug 2026 13:48:19 GMT]]>Most likely, a parent widget.. What Desktop/Windowing system is this?

]]>https://forum.qt.io/post/839511https://forum.qt.io/post/839511Mon, 03 Aug 2026 13:48:19 GMT