How to raise a QWidget over QGraphicsObjects in a QGraphicsScene

[sedi]

Hi,
I'm using a QGraphicsScene with several QGraphicsObjects of different zValue.
Now I have made a Control Widget (a few QPushbuttons and QComboBoxes and Layouts on a QWidget) with QCreator and added it to the

QGraphicsScene with scene->addWidget(controlWidget);

QGraphicsScene with scene->addWidget(controlWidget);

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The problem is: the widget is being overlapped by most of the other objects in the scene.

I tried the QWidget::raise(); method to no avail at all. Is there any way to make QWidget appear in front of all QGraphicsScene members?
I cannot ensure that the widget is addet as last member to the scene.

I am running out of ideas :-( Any help is welcome, thank you for reading!

Sebastian