MultiColumnComboBox Model select question

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Hello,
following code creates a 2column QComboBox.
void MainWindow::populateCbToFire() {
// multicolumn fill cb_toFire

QMap<QString, QString>cmdMap;
cmdMap.insert("init__0","AA 0D 00 FF 0A 00 00 00 FF FF FF FF 00 00");
cmdMap.insert("init__1","AA 15 00 FE 0A 00 00 00 FF FF FF FF 00 00 0A 00 00 00 10 77 00 82");
cmdMap.insert("init__2","AA 11 00 01 0A 00 00 00 FF FF FF FF 00 00 00 01 00 00");
cmdMap.insert("init__3","AA 25 00 01 0A 00 00 00 FF FF FF FF 00 00 00 02 00 0D 10 00 21 A8 68 07 2F 10 0A 01 EF 19 F4 53 47 00");
cmdMap.insert("init__4","AA 11 00 01 0A 00 00 00 FF FF FF FF 00 00 00 02 00 0E");
cmdMap.insert("init__5","AA 25 00 01 0A 00 00 00 FF FF FF FF 00 00 00 02 00 0D 06 00 10 00 21 A8 00 00 00 00 E0 93 04 00 F4 53 47 00");
cmdMap.insert("init__6","AA 13 00 01 0A 00 00 00 00 00 00 00 00 00 00 02 00 01 00 00 ");

QStandardItemModel *model = new QStandardItemModel(cmdMap.count(), 2, this );
QMap<QString, QString>::const_iterator it = cmdMap.constBegin();
int cnt = 0;
while (it != cmdMap.end()) {
    QStandardItem* col0 = new QStandardItem(QString("%1").arg(it.key()));
    QStandardItem* col1 = new QStandardItem(QString("%1").arg(it.value()));
    model->setItem(cnt, 0, col0);
    model->setItem(cnt, 1, col1);
    it++; cnt++;
}

QTableView* tableView = new QTableView(this);
tableView->setModel(model);

tableView->verticalHeader()->setVisible(false);
tableView->horizontalHeader()->setVisible(false);

tableView->resizeColumnsToContents();
tableView->resizeRowsToContents();

tableView->setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
tableView->setSelectionBehavior(QAbstractItemView::SelectRows);

tableView->setAutoScroll(false);

ui->cb_toFire->setModel(model);
ui->cb_toFire->setView(tableView);

}

The "popdown" of the ComboBox shows both columns.
When i select a row with mouse, the 1st column only is shown on Top of box.
Here i want the second column to be shown, so i also get 2nd column when
calling "ui->cb_toFire->currentText()" .
How to do this ?

just setting modelcolumn to 1 seems to do the job,
but in the drop-down area of the combobox the first column is not visible now.
ui->cb_toFire->setModelColumn(1);