Can'r find proper signal for QtableView QSqueryModel

I have QtablewView used with QSqlQueryModel.
I want when a row is selected to make "remove" button enabled.When no selection is there the button to remain disabled.

I figured out how to get signal when the selection has changed, but i need whether there is a selected row:

Code:

---

QItemSelectionModel *sm = ui->tableView_partners->selectionModel();
connect(sm, SIGNAL(currentRowChanged(QModelIndex,QModelIndex)),
this, SLOT(enableDeleteButton()));
 
void Partners::enableDeleteButton()
{
 
if (ui->tableView_partners->selectionModel()->currentIndex().isValid() == true)
{
    ui->pushButton_delete->setEnabled(true);
 }
 
else {
    ui->pushButton_delete->setEnabled(false);
}
}

---

You can try connecting directly to your table view's selectionChanged signal.

QItemSelectionModel::selectedRows()?

Cheers,
_