Determine if row in QTableWidget is visible / QTableWidget properties

Hello,

I am looking for possibility to determine, how many rows in QTableWidget is visible on the screen.

or...

Aby way to change QTableWidget properties to resize my items horizontally, if part of the data is not visible. The goal is show on this screen:

http://www.win-tech.com/graphics/scanner1.gif

Loop over the items.
Use http://doc.qt.nokia.com/4.7/qtablewi...visualItemRect