QTableView - scroll performance changed from 4.0 to 4.1 and 4.2

[budul]

Please, tell me how one can easily paint widget which contains 3-4 other widgets to item in TableView. Simply i need these features of TableView as resizing columns, hiding columns. That's why i'm using table.

Attached is the picture of what i've got and need. How this can be done more optimized way?
Thanks a lot!
B.