QTableWidget->setItem triggers on_tableWidget_itemChanged slot

[kahlenberg]

Hi,
I have a table and I want to make sure that user input is a hex number. I am checking entered text in on_tableWidget_itemChanged() slot, if it is not hex I set the cell with default value "00000000", but this setting triggers second on_tableWidget_itemChanged slot which I don't want. How can I avoid second call of on_tableWidget_itemChanged slot?

Or how can I restrict user inputs only for Hex values?

void MainWindow::on_tableWidgetRegisterList_itemChanged(QTableWidgetItem *writeItem)
{
    if(TableInit && writeItem->column() == 4) // write column
    {
        bool convertState;
        QTableWidgetItem *nameItem = ui->tableWidgetRegisterList->item(writeItem->row(), 0); // name column
        QString regName = nameItem->text();
        quint32 regWriteVal = writeItem->text().toUInt(&convertState, 16);
        int i = 0;

        if(!convertState)  // User input is not hex
        {
            regWriteVal = 0;
            QTableWidgetItem *defaultItem = new QTableWidgetItem;
            defaultItem->setText("00000000");
            defaultItem->setBackground(nameItem->background().color());
            ui->tableWidgetRegisterList->setItem(writeItem->row(), writeItem->column(), defaultItem);  //If user input is not hex, this slot will be recalled again because of this function setItem()
        }
        else
            for(i = 0; i < Registers.size(); i++)
            {
                if(Registers[i].Name.compare(regName.split('.')[0]) == 0)
                {
                    Registers[i].Write = regWriteVal;
                    Registers[i].ToSend = convertState;
                    writeItem->setBackground(Qt::yellow);
                    break;
                }
            }
    }
}

[SGaist]

Hi,

Why not do that at the editor level ? Using e.g. a QStyledItemDelegate. Doing so would avoid user entering anything that's incorrect.