QtDemo

[nish]

I want an open-source software, on the network traffic management. When will the code to put on Google Code

you should seriously consider hiring a chinese-to-english translator. Your english can be very easily misunderstood.

[aamer4yu]

For your requirement, you can use a QListWidget on left side, and a QStackedWidget on right side.
Then on item selection / item clicked, you can show the desired custom widget in the stacked widget.