[Qt-interest] QGraphicsProxyWidget::setWidget: cannot embed widget 0x99fd6c0 that is not a window ???

[Bart van Deenen]

Hi all

I'm embedding a QStackedWidget subclass into a QGraphicsScene and I get
this error:

QGraphicsProxyWidget::setWidget: cannot embed widget 0x99fd6c0 that is
not a window

Huh? 

The QStackedWidget has 0 or more Phonon::VideoWidget's inside it.
Despite this warning, the videos do show up, but rescaling the
graphicsview does not rescale my QStackedWidget.

The QStackedWidget subclass itself works fine in a normal QWidget
parent.

So what does this error mean?

Thanks

Bart