[Qt-interest] How can I refresh the screen?

[Kermit Mei]

Hello, I use Qtoptia-4.3.0 on ARM.  The QlistView on my ARM can't be
refreshed, if I turn to another widget.

I guess that the ARM must can't refresh the screen clearly if there's
one or more Qlist on it. Now How can I do to clean the listview's
remains?

Can I refresh the screen? Then how to do it?

BTW: I'm sure that I have delete the lists, and I did it by calling:
 listView->deleteLater(); 
 qApp->processEvents();

Thanks.
Kermit Mei