Upgrade QGraphicsTextItem (and friends) to QGraphicsWidget?

[Asperamanca]

I'd like to use some of the ready-to-use QGraphicsItem classes, like QGraphicsTextItem, QGraphicsPixmapItem,...

However, I want to use layouts, so I need QGraphicsWidgets.

The only way I could come up with would be to create a class that derives from QObject, QGraphicsTextItem (or another) and QGraphicsLayoutItem, and then implement those methods that are implemented in QGraphicsObject or QGraphicsWidget, and missing in QGraphicsTextItem.

Sounds a bit tricky. Any better idea?

[MaQzma]

Well, you could use Adapter design pattern, but I am not sure.

[Asperamanca]

My best idea right now is to use a composition: A QGraphicsWidget containing the item I want. The tricky part is that one essential change notification (boundingRect changes) is missing, which makes things kinda awkward.