how to get row number after comboBox item in QTableWidget in qt

Question

I would like to get a number of a QTableWidget row after selecting some topic in comboBox how it is possible to get the row, thanks.

void MainWindow::metto_stringa(int i)
{
    QWidget *w = qobject_cast<QWidget *>(sender()->parent());
    if(w)
    {
        int row = ui->tableWidget->indexAt(w->pos()).row();
        ui->lineEdit->setText(QString::number( row ));
    }
    // ui->lineEdit->setText(QString::number( i ));
}

else if(i == 3)
{
     // ui->tableWidget->setCellWidget(ui->tableWidget->rowCount(), i, "");
      QString s = "Normal";
      QComboBox *combo = new QComboBox;
      combo->addItem("Below normal");
      combo->addItem("Normal");
      combo->addItem("Above normal");
      combo->addItem("High");
      combo->addItem("Real time");
      connect(combo,SIGNAL(currentIndexChanged(int)),this,
      SLOT(metto_stringa(int)));
      ui->tableWidget->setCellWidget(ui->tableWidget->rowCount()-1,  i,combo);
      /*  ui->tableWidget->setCellWidget(i,4,combo);
      QTableWidgetItem*item = new QTableWidgetItem(s);
      item->setFlags(item->flags() ^ Qt::ItemIsEditable);
      ui->tableWidget->setItem(ui->tableWidget->rowCount()-1, i, 
      item);*/
      continue;
}

eyllanesc · Accepted Answer · 2017-09-26T20:43:17.657

2

In this case you should not use the parent of the QComboBox, you must use the same sender()

void MainWindow::metto_stringa(int index)
{
    QWidget *w = qobject_cast<QWidget *>(sender());
    if(w)
    {
        int row = ui->tableWidget->indexAt(w->pos()).row();
        ui->lineEdit->setText(QString::number(row));
    }
}

In the question I answered before I commented that you must access the widget that you use in the setCellWidget() function, in the previous case the widget had the following form:

QWidget <--- QPushButton
parent()     sender()

ie you owe to that widget so we take advantage of sender() and parent() in the previous case. In the current case QComboBox is added directly.

edited Sep 26 '17 at 20:43

answered Sep 26 '17 at 20:38

eyllanesc

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eyllanesc, thanks for your idea but it doesnt works for me it writes -1 in qlineEdit maybe you know how it is possible to use currentRow() for it? – Sep 26 '17 at 20:51
Are you sure ?, I just tried it and I do not get the correct row – eyllanesc Sep 26 '17 at 20:54
`currentRow()` does not work since this returns the row that has been selected and in case you use `setCellWidget()` the selection is not transmitted to the table. – eyllanesc Sep 26 '17 at 20:57
Check my answer, you have to change: `QWidget *w = qobject_cast(sender()->parent());` to `QWidget *w = qobject_cast(sender());` – eyllanesc Sep 26 '17 at 20:58
You have not made this change, please correct it and if it works do not forget to mark my answer as correct. – eyllanesc Sep 26 '17 at 20:59

how to get row number after comboBox item in QTableWidget in qt

1 Answers1