this, &MainWindow::onNumOfSamplesChanged);

    // init port signals

    QObject::connect(&(this->serialPort), SIGNAL(error(QSerialPort::SerialPortError)),

                     this, SLOT(onPortError(QSerialPort::SerialPortError)));

    loadPortList();

    loadBaudRateList();

    ui->cbBaudRate->setCurrentIndex(ui->cbBaudRate->findText("9600"));

    // init plot

    numOfSamples = ui->spNumOfSamples->value();

    dataArray.resize(numOfSamples);

    dataX.resize(numOfSamples);

    for (int i = 0; i < dataX.size(); i++)

    {

        dataX[i] = i;

    }

    curve.setSamples(dataX, dataArray);

    curve.attach(ui->plot);

}

MainWindow::~MainWindow()

{

    delete ui;

}

void MainWindow::loadPortList()

{

    QString currentSelection = ui->cbPortList->currentText();

    ui->cbPortList->clear();

    for (auto port : QSerialPortInfo::availablePorts())

    {

        ui->cbPortList->addItem(port.portName());

    }

    // find current selection in the new list, maybe it doesn't exist anymore?

    int currentSelectionIndex = ui->cbPortList->findText(currentSelection);

    if (currentSelectionIndex >= 0)

    {

        ui->cbPortList->setCurrentIndex(currentSelectionIndex);

    }

    else // our port doesn't exist anymore, close port if it's open

    {

        if (serialPort.isOpen()) togglePort();

    }