void QAbstractItemView::scrollToBottom () [slot]
Scrolls the view to the bottom.
This function was introduced in Qt 4.1.
See also scrollTo() and scrollToTop().
void QAbstractItemModel::rowsInserted ( const QModelIndex & parent, int start, int end ) [signal]
This signal is emitted after rows have been inserted into the model. The new items are those between start and end inclusive, under the given parent item.
Например так:
C++ (Qt)
connect(tableView->model(), SIGNAL(rowsInserted(const QModelIndex &, int, int)), tableView, SLOT(scrollToBottom()));