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.