QTableWidget contextMenu crashing the application

[hbatalha]

I just created a context menu for my QTableWidget and it is working fine, as long as I request the menu with the mouse on a row.

If the table is empty or if I put the mouse on a empty space inside the table this will crash my application

//this is my connect
connect(ui->table, &QTableWidget::customContextMenuRequested, this, &MainWindow::popupMenuTableShow);

//snnipet of function
void MainWindow::popupMenuTableShow(const QPoint &pos)
{
    int i = ui->table->itemAt(pos)->row(); // crashes here

...
}

I understand that since I have no row selected the application is expected to crash, but I can't seem to find a solution for this.

Any help or insight is appreciated.

[SGaist]

Hi,

You don't check the value returned by itemAt which is going to be nullptr if the table is empty.

[hbatalha]

@SGaist Yeah, I went to the documentation and I just solved the problem

void MainWindow::popupMenuTableShow(const QPoint &pos)
{
    QTableWidgetItem *item = ui->table->itemAt(pos);

    if(item != nullptr)
    {
        int i = item->row();
        ...
    }

...
}

Still, thank you.