Moving child widgets between QTabWidgets?

[Matic Kukovec]

removeTab() does not reparent the widget, you need to call setParent(None) after removeTab.
That is exactly what I do not want, as setParent(None) will delete the underlying widget. I want it moved to the other tabwidget.
You also shouldn't need to set the old and new tab widgets to None.

David
I know, I just copied my development application's behaviour.

Matic
________________________________
From: David Boddie <david at boddie.org.uk>
Sent: Wednesday, January 18, 2023 5:23 PM
To: pyqt at riverbankcomputing.com <pyqt at riverbankcomputing.com>
Subject: Re: Moving child widgets between QTabWidgets?

On Wed Jan 18 13:48:58 GMT 2023, Matic Kukovec wrote:

> I managed to get a self-contained example which throws the same error as my
> development code:

I think you should avoid reparenting the old QTabWidget to None before you
move the pages into the new QTabWidget.

Try this version of the switch method:

    def switch(self, *args):
        widgets = []
        old_tab_widget = self.tab_widget
        for i in reversed(range(old_tab_widget.count())):
            widgets.append((old_tab_widget.widget(i),
old_tab_widget.tabText(i)))
            old_tab_widget.removeTab(i)

        new_tab_widget = QTabWidget()
        for widget, tab_text in widgets:
            new_tab_widget.addTab(widget, tab_text) # <- ERROR THROWN HERE

        for i in reversed(range(self.centralWidget().count())):
            self.centralWidget().widget(i).setParent(None)
        #old_tab_widget = None
        #self.tab_widget = None

        self.centralWidget().addWidget(new_tab_widget)
        self.tab_widget = new_tab_widget

You also shouldn't need to set the old and new tab widgets to None.

David


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