Set current portName (QSerialPort)

[maratk1n]

Hi all!
The examples show code in Terminal project:

//in constructor
fillPortsInfo();
//..//
void Settings::fillPortsInfo()
{
    ui->serialPortInfoListBox->clear();
    foreach (const QSerialPortInfo &info, QSerialPortInfo::availablePorts()) {
        QStringList list;
        list << info.portName()
             << info.description()
             << info.manufacturer()
             << info.systemLocation()
             << (info.vendorIdentifier() ? QString::number(info.vendorIdentifier(), 16) : QString())
             << (info.productIdentifier() ? QString::number(info.productIdentifier(), 16) : QString());
 
         ui->serialPortInfoListBox->addItem(list.first(), list);
        }
    }
}

//in constructor
fillPortsInfo();
//..//
void Settings::fillPortsInfo()
{
    ui->serialPortInfoListBox->clear();
    foreach (const QSerialPortInfo &info, QSerialPortInfo::availablePorts()) {
        QStringList list;
        list << info.portName()
             << info.description()
             << info.manufacturer()
             << info.systemLocation()
             << (info.vendorIdentifier() ? QString::number(info.vendorIdentifier(), 16) : QString())
             << (info.productIdentifier() ? QString::number(info.productIdentifier(), 16) : QString());

         ui->serialPortInfoListBox->addItem(list.first(), list);
        }
    }
}

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How can I display the current port in the QComboBox (serialPortInfoListBox) that I take from the config.ini file?
Now I have the first (or last) port from the list of ports.