[Qt-interest] Selection not showing?

[KC Jones]

I have a QTreeView widget.
I get its selection model.
I use that to select an item in the tree widget:

        m_ui->table->selectionModel()->select(idmapped,
QItemSelectionModel::SelectCurrent);
        m_ui->table->scrollTo(idmapped);

The current item is correct.  If I use arrow keys to navigate, the
navigation starts at the correct item.
When I check the selection model, it is correct.

But the selected item is not displayed as selected.

What am I missing?