Hi,
It seems I can go with the solution I described. I don't need the tree view to be focused, so I just removed the “focus rect” (if that is the name Qt people know ;)) by setting the focus policy of the tree to Qt.NoFocus. I draw the “cursor” then myself by giving a different backlog in QAbstractItemModel::data. That makes anyway sense since the cursor position is part of my domain model.

Thanks for help and inspiration!
Dan

@J.Hilk
ok then you can follow the suggestion from @mrjj (in case you would have set a custom model you would have need to handle the Qt::SizeHintRole in your data() method)
or try to set a QStyledItemDelegate to the view and use your stylesheet.

@tokafr
Super.
so it can copy files on its own ?
Doc hinted it, but I was not sure.

@kshegunov

Since I already worked with the graphics framework, I will stick with it!
Thank you both for your posts. It saved me a lot of time trying ;)

solved