Change forms with QTreeWidget

Hello everybody!

I need some ideas for my app. Let me try to explayin what I'm looking for:
I've a QMainWindow application. This one have to handle many other forms. In the left side I have a QTreeWidget taht keeps the application names that can be choose:

App 1
- App 1.1
- App 1.2
App 2
- App 2.1
App 3
....

On at the application, the forms have to be shown right.
For example like this: http://doc.trolltech.com/4.2/dialogs-configdialog.html
But I need it as a tree.
Which technique or classes I have to use to realise this?

I'm thankful for any replies/ideas.

Olli

QTreeView/QTreeWidget and QStackedWidget.