Selected Rows moveUp/moveDown in QTableWidget

[imagineryhead]

Hello folks,
I've a quick question. I need to moveUp selected rows in tablewidget.
I guess miss something, not working!

void MainWindow::moveUp()
{
        QItemSelectionModel *smodel= ui.tableView->selectionModel();
        if (smodel==0) {
                return;
        }
        QModelIndexList selectionList =smodel->selectedRows();
        QModelIndex idx = selectionList.first();
        int row=idx.row()-1;
        if (row<0) {
                row=0;
        }
        QModelIndex previous=model->index(row,idx.column());
        ui.tableView->selectionModel()->select(previous, QItemSelectionModel::ClearAndSelect | QItemSelectionModel::Rows);
        ui.tableView->setCurrentIndex(model->index(row,idx.column()));
        ui.tableView->scrollTo(ui.tableView->currentIndex());
 
}

void MainWindow::moveUp()
{
        QItemSelectionModel *smodel= ui.tableView->selectionModel();
        if (smodel==0) {
                return;
        }
        QModelIndexList selectionList =smodel->selectedRows();
        QModelIndex idx = selectionList.first();
        int row=idx.row()-1;
        if (row<0) {
                row=0;
        }
        QModelIndex previous=model->index(row,idx.column());
        ui.tableView->selectionModel()->select(previous, QItemSelectionModel::ClearAndSelect | QItemSelectionModel::Rows);
        ui.tableView->setCurrentIndex(model->index(row,idx.column()));
        ui.tableView->scrollTo(ui.tableView->currentIndex());
       
}

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