QTableView item's Highlight in QCombox

Hello everyone!
I ran into a problem, please help me.

first i set currentindex (combox->setCurrentIndex(3);)
then i popup tableview ,the tableview's current index is corrected,and show Highlight,
but when mouse move into tableview, the Highlight is change with mouse move,
how can disable auto change Highlight ,and limited change Highlight only when mouse click?

i tried tableView->viewport()->setMouseTracking(false);
this is worked

but someone will notice that combox->setView(tableView);
will call itemview->setMouseTracking(true);

so usage:
combox->setView(tableView);
tableView->viewport()->setMouseTracking(false);

thank