[PySide] QML combobox in ListView delagate

[Sergey]

Hi,

I'm trying to use combobox from this post in my ListView item delagate:
http://qt-project.org/forums/viewthread/9275

Drop-down menu is displayed under listview rows, which are below current.
If scroll listview in upper direction, z-order or rows changes, and drop 
down menu becomes over below rows.
Is there a way to tell QML engine to display drop down menu over all 
ListView rows in any case?

--
Sergey