(int) QSerialPort::NoFlowControl);

    flowControlButtons.addButton(ui->rbHardwareControl,

                                 (int) QSerialPort::HardwareControl);

    flowControlButtons.addButton(ui->rbSoftwareControl,

                                 (int) QSerialPort::SoftwareControl);

    QObject::connect(&flowControlButtons,

                     SELECT<int>::OVERLOAD_OF(&QButtonGroup::buttonClicked),

                     this, &PortControl::selectFlowControl);

    // initialize signal leds

    ui->ledDTR->setOn(true);

    ui->ledRTS->setOn(true);

    // connect output signals

    connect(ui->pbDTR, &QPushButton::clicked, [this]()

            {

                // toggle DTR

                ui->ledDTR->toggle();

                if (serialPort->isOpen())

                {

                    serialPort->setDataTerminalReady(ui->ledDTR->isOn());

                }

            });

    connect(ui->pbRTS, &QPushButton::clicked, [this]()

            {

                // toggle RTS

                ui->ledRTS->toggle();

                if (serialPort->isOpen())

                {

                    serialPort->setRequestToSend(ui->ledRTS->isOn());

                }

            });

    // setup pin update leds

    ui->ledDCD->setColor(Qt::yellow);

    ui->ledDSR->setColor(Qt::yellow);

    ui->ledRI->setColor(Qt::yellow);

    ui->ledCTS->setColor(Qt::yellow);

    pinUpdateTimer.setInterval(1000); // ms

    connect(&pinUpdateTimer, &QTimer::timeout, this, &PortControl::updatePinLeds);

    loadPortList();

    loadBaudRateList();

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

}

PortControl::~PortControl()

{

    delete ui;

}

void PortControl::loadPortList()

{

    QString currentSelection = ui->cbPortList->currentData(PortNameRole).toString();

    portList.loadPortList();

    int index = portList.indexOf(currentSelection);

    if (index >= 0)

    {

        ui->cbPortList->setCurrentIndex(index);

        tbPortList.setCurrentIndex(index);

    }

}

void PortControl::loadBaudRateList()

{

    ui->cbBaudRate->clear();

    for (auto baudRate : QSerialPortInfo::standardBaudRates())

    {

        ui->cbBaudRate->addItem(QString::number(baudRate));

    }

}

void PortControl::_selectBaudRate(QString baudRate)

{

    if (serialPort->isOpen())

    {

        if (!serialPort->setBaudRate(baudRate.toInt()))

        {

            qCritical() << "Can't set baud rate!";

        }

    }

}

void PortControl::selectParity(int parity)

{

    if (serialPort->isOpen())

    {

        if(!serialPort->setParity((QSerialPort::Parity) parity))

        {

            qCritical() << "Can't set parity option!";

        }

    }

}

void PortControl::selectDataBits(int dataBits)

{

    if (serialPort->isOpen())

    {

        if(!serialPort->setDataBits((QSerialPort::DataBits) dataBits))

        {

            qCritical() << "Can't set numer of data bits!";

        }

    }

}

void PortControl::selectStopBits(int stopBits)

{

    if (serialPort->isOpen())

    {

        if(!serialPort->setStopBits((QSerialPort::StopBits) stopBits))

        {

            qCritical() << "Can't set number of stop bits!";

        }

    }

}

void PortControl::selectFlowControl(int flowControl)

{

    if (serialPort->isOpen())

    {

        if(!serialPort->setFlowControl((QSerialPort::FlowControl) flowControl))

        {

            qCritical() << "Can't set flow control option!";

        }

    }

}

void PortControl::togglePort()

{

    if (serialPort->isOpen())

    {

        pinUpdateTimer.stop();

        serialPort->close();

        qDebug() << "Closed port:" << serialPort->portName();

        emit portToggled(false);

    }

    else

    {

        // we get the port name from the edit text, which may not be

        // in the portList if user hasn't pressed Enter

        // Also note that, portText may not be the `portName`

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

        QString portName;

        int portIndex = portList.indexOf(portText);

        if (portIndex < 0) // not in list, add to model and update the selections

        {

            portList.appendRow(new PortListItem(portText));

            ui->cbPortList->setCurrentIndex(portList.rowCount()-1);

            tbPortList.setCurrentIndex(portList.rowCount()-1);

            portName = portText;

        }

        else

        {

            // get the port name from the data field

            portName = static_cast<PortListItem*>(portList.item(portIndex))->portName();

        }

        serialPort->setPortName(ui->cbPortList->currentData(PortNameRole).toString());

        // open port

        if (serialPort->open(QIODevice::ReadWrite))

        {

            // set port settings

            _selectBaudRate(ui->cbBaudRate->currentText());

            selectParity((QSerialPort::Parity) parityButtons.checkedId());

            selectDataBits((QSerialPort::DataBits) dataBitsButtons.checkedId());

            selectStopBits((QSerialPort::StopBits) stopBitsButtons.checkedId());

            selectFlowControl((QSerialPort::FlowControl) flowControlButtons.checkedId());

            // set output signals

            serialPort->setDataTerminalReady(ui->ledDTR->isOn());

            serialPort->setRequestToSend(ui->ledRTS->isOn());

            // update pin signals

            updatePinLeds();

            pinUpdateTimer.start();

            qDebug() << "Opened port:" << serialPort->portName();

            emit portToggled(true);

        }

    }

    openAction.setChecked(serialPort->isOpen());

}

void PortControl::selectListedPort(QString portName)

{

    // portName may be coming from combobox

    portName = portName.split(" ")[0];

    // has selection actually changed

    if (portName != serialPort->portName())

    {

        // if another port is already open, close it by toggling

        if (serialPort->isOpen())

        {

            togglePort();

            // open new selection by toggling

            togglePort();

        }

    }

}

QString PortControl::selectedPortName()

{

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

    int portIndex = portList.indexOf(portText);

    if (portIndex < 0) // not in the list yet

    {

        // return the displayed name as port name

        return portText;

    }

    else

    {

        // get the port name from the 'port list'

        return static_cast<PortListItem*>(portList.item(portIndex))->portName();

    }

}

QToolBar* PortControl::toolBar()

{

    return &portToolBar;

}

void PortControl::openActionTriggered(bool checked)

{

    togglePort();

}

void PortControl::onCbPortListActivated(int index)

{

    tbPortList.setCurrentIndex(index);

}

void PortControl::onTbPortListActivated(int index)

{

    ui->cbPortList->setCurrentIndex(index);

}

void PortControl::onPortError(QSerialPort::SerialPortError error)

{

#ifdef Q_OS_UNIX

    // For suppressing "Invalid argument" errors that happens with pseudo terminals

    auto isPtsInvalidArgErr = [this] () -> bool {

        return serialPort->portName().contains("pts/") && serialPort->errorString().contains("Invalid argument");

    };

#endif

    switch(error)

    {

        case QSerialPort::NoError :

            break;

        case QSerialPort::ResourceError :

            qWarning() << "Port error: resource unavaliable; most likely device removed.";

            if (serialPort->isOpen())

            {

                qWarning() << "Closing port on resource error: " << serialPort->portName();

                togglePort();

            }

            loadPortList();

            break;

        case QSerialPort::DeviceNotFoundError:

            qCritical() << "Device doesn't exists: " << serialPort->portName();

            break;

        case QSerialPort::PermissionError:

            qCritical() << "Permission denied. Either you don't have \

required privileges or device is already opened by another process.";

            break;

        case QSerialPort::OpenError:

            qWarning() << "Device is already opened!";

            break;

        case QSerialPort::NotOpenError:

            qCritical() << "Device is not open!";

            break;

        case QSerialPort::ParityError:

            qCritical() << "Parity error detected.";

            break;

        case QSerialPort::FramingError:

            qCritical() << "Framing error detected.";

            break;

        case QSerialPort::BreakConditionError:

            qCritical() << "Break condition is detected.";

            break;

        case QSerialPort::WriteError:

            qCritical() << "An error occurred while writing data.";

            break;

        case QSerialPort::ReadError:

            qCritical() << "An error occurred while reading data.";

            break;

        case QSerialPort::UnsupportedOperationError:

#ifdef Q_OS_UNIX

            // Qt 5.5 gives "Invalid argument" with 'UnsupportedOperationError'

            if (isPtsInvalidArgErr())

                break;

#endif

            qCritical() << "Operation is not supported.";

            break;

        case QSerialPort::TimeoutError:

            qCritical() << "A timeout error occurred.";

            break;

        case QSerialPort::UnknownError:

#ifdef Q_OS_UNIX

            // Qt 5.2 gives "Invalid argument" with 'UnknownError'

            if (isPtsInvalidArgErr())

                break;

#endif

            qCritical() << "Unknown error! Error: " << serialPort->errorString();

            break;

        default:

            qCritical() << "Unhandled port error: " << error;

            break;

    }

}

void PortControl::updatePinLeds(void)

{

    auto pins = serialPort->pinoutSignals();

    ui->ledDCD->setOn(pins & QSerialPort::DataCarrierDetectSignal);

    ui->ledDSR->setOn(pins & QSerialPort::DataSetReadySignal);

    ui->ledRI->setOn(pins & QSerialPort::RingIndicatorSignal);

    ui->ledCTS->setOn(pins & QSerialPort::ClearToSendSignal);

}

QString PortControl::currentParityText()

{

    return paritySettingMap.value(

        (QSerialPort::Parity) parityButtons.checkedId());

}

QString PortControl::currentFlowControlText()

{

    if (flowControlButtons.checkedId() == QSerialPort::HardwareControl)

    {

        return "hardware";

    }

    else if (flowControlButtons.checkedId() == QSerialPort::SoftwareControl)

    {

        return "software";

    }

    else // no parity

    {

        return "none";

    }

}

void PortControl::selectPort(QString portName)

{

    int portIndex = portList.indexOfName(portName);

    if (portIndex < 0) // not in list, add to model and update the selections

    {

        portList.appendRow(new PortListItem(portName));

        portIndex = portList.rowCount()-1;

    }

    ui->cbPortList->setCurrentIndex(portIndex);

    tbPortList.setCurrentIndex(portIndex);

    selectListedPort(portName);

}

void PortControl::selectBaudrate(QString baudRate)

{

    int baudRateIndex = ui->cbBaudRate->findText(baudRate);

    if (baudRateIndex < 0)

    {

        ui->cbBaudRate->setCurrentText(baudRate);

    }

    else

    {

        ui->cbBaudRate->setCurrentIndex(baudRateIndex);

    }

    _selectBaudRate(baudRate);

}

void PortControl::openPort()

{

    if (!serialPort->isOpen())

    {

        openAction.trigger();

    }

}