Determine single selected row in a table view

Perdrix

I have a table view that's set for Extended Selection. Is the following correct code to determine if a single row is selected, and if so which row number it is? If correct is this the "best way" or is there a better way to do it?

//Assume that the following has been done:
//	connect(ui->tableView, SIGNAL(clicked(const QModelIndex&)), this, SLOT(tableViewItemClickedEvent(const QModelIndex&)));

void StackingDlg::tableViewItemClickedEvent(const QModelIndex& index)
{
	qDebug() << "Table View item clicked, row " << index.row();
	QItemSelectionModel * qsm = ui->tableView->selectionModel();
	QModelIndexList selectedRows = qsm->selectedRows();
	//
	// If only one row is selected, we want to know the filename
	//
	if (1 == selectedRows.count())
	{
		QModelIndex& index = selectedRows[0];
		if (index.isValid())
		{
			const DSS::ImageListModel* model = dynamic_cast<const DSS::ImageListModel*>(index.model());
			int row = index.row();
			m_strShowFile = model->selectedFileName(row);
		}
	}
}

VRonin

Very close. QModelIndexList selectedRows = qsm->selectedRows(); should be QModelIndexList selectedRows = qsm->selectedIndexes();

Perdrix

Please could you explain why QItemSelectionModel::selectedRows() isn't correct? Or put another way - what's the crucial difference?

PS the code I have to set up the table view reads:

        tableView->setSelectionMode(QAbstractItemView::ExtendedSelection);
        tableView->setSelectionBehavior(QAbstractItemView::SelectRows);

JonB

@Perdrix said in Determine single selected row in a table view:

PS the code I have to set up the table view reads:
tableView->setSelectionBehavior(QAbstractItemView::SelectRows);

Given this I think your use of selectedRows() is correct. Maybe not knowing that affected @VRonin's answer.

VRonin

@Perdrix said in Determine single selected row in a table view:

tableView->setSelectionBehavior(QAbstractItemView::SelectRows);

In this case they are equivalent.

The doc explains the difference pretty well:

QModelIndexList QItemSelectionModel::selectedRows(int column = 0) const
Returns the indexes in the given column for the rows where all columns are selected.

So if you selected a single cell in a row selectedRows would not return it