QListView sorting

[fear]

My settings:

lvi->setSelectionMode(QListView::Extended);
lvi->setShowSortIndicator(true);
lvi->setShadeSortColumn(true);
lvi->setResizeMode(QListView::NoColumn);
lvi->setDropVisualizer(false);
lvi->setAllColumnsShowFocus(true);

lvi->setSelectionMode(QListView::Extended);
lvi->setShowSortIndicator(true);
lvi->setShadeSortColumn(true);
lvi->setResizeMode(QListView::NoColumn);
lvi->setDropVisualizer(false);
lvi->setAllColumnsShowFocus(true);

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Problem is I don't know what actually sorts items! As I mentioned sort() is not called (but QListViewItems are sorted!).