settingsdialog.cpp Example File

  /****************************************************************************
  **
  ** Copyright (C) 2012 Denis Shienkov <denis.shienkov@gmail.com>
  ** Copyright (C) 2012 Laszlo Papp <lpapp@kde.org>
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the QtSerialPort module of the Qt Toolkit.
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  #include "settingsdialog.h"
  #include "ui_settingsdialog.h"

  #include <QtSerialPort/QSerialPortInfo>
  #include <QIntValidator>
  #include <QLineEdit>

  QT_USE_NAMESPACE

  static const char blankString[] = QT_TRANSLATE_NOOP("SettingsDialog", "N/A");

  SettingsDialog::SettingsDialog(QWidget *parent) :
      QDialog(parent),
      ui(new Ui::SettingsDialog)
  {
      ui->setupUi(this);

      intValidator = new QIntValidator(0, 4000000, this);

      ui->baudRateBox->setInsertPolicy(QComboBox::NoInsert);

      connect(ui->applyButton, &QPushButton::clicked,
              this, &SettingsDialog::apply);
      connect(ui->serialPortInfoListBox, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged),
              this, &SettingsDialog::showPortInfo);
      connect(ui->baudRateBox,  static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged),
              this, &SettingsDialog::checkCustomBaudRatePolicy);
      connect(ui->serialPortInfoListBox,  static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged),
              this, &SettingsDialog::checkCustomDevicePathPolicy);

      fillPortsParameters();
      fillPortsInfo();

      updateSettings();
  }

  SettingsDialog::~SettingsDialog()
  {
      delete ui;
  }

  SettingsDialog::Settings SettingsDialog::settings() const
  {
      return currentSettings;
  }

  void SettingsDialog::showPortInfo(int idx)
  {
      if (idx == -1)
          return;

      QStringList list = ui->serialPortInfoListBox->itemData(idx).toStringList();
      ui->descriptionLabel->setText(tr("Description: %1").arg(list.count() > 1 ? list.at(1) : tr(blankString)));
      ui->manufacturerLabel->setText(tr("Manufacturer: %1").arg(list.count() > 2 ? list.at(2) : tr(blankString)));
      ui->serialNumberLabel->setText(tr("Serial number: %1").arg(list.count() > 3 ? list.at(3) : tr(blankString)));
      ui->locationLabel->setText(tr("Location: %1").arg(list.count() > 4 ? list.at(4) : tr(blankString)));
      ui->vidLabel->setText(tr("Vendor Identifier: %1").arg(list.count() > 5 ? list.at(5) : tr(blankString)));
      ui->pidLabel->setText(tr("Product Identifier: %1").arg(list.count() > 6 ? list.at(6) : tr(blankString)));
  }

  void SettingsDialog::apply()
  {
      updateSettings();
      hide();
  }

  void SettingsDialog::checkCustomBaudRatePolicy(int idx)
  {
      bool isCustomBaudRate = !ui->baudRateBox->itemData(idx).isValid();
      ui->baudRateBox->setEditable(isCustomBaudRate);
      if (isCustomBaudRate) {
          ui->baudRateBox->clearEditText();
          QLineEdit *edit = ui->baudRateBox->lineEdit();
          edit->setValidator(intValidator);
      }
  }

  void SettingsDialog::checkCustomDevicePathPolicy(int idx)
  {
      bool isCustomPath = !ui->serialPortInfoListBox->itemData(idx).isValid();
      ui->serialPortInfoListBox->setEditable(isCustomPath);
      if (isCustomPath)
          ui->serialPortInfoListBox->clearEditText();
  }

  void SettingsDialog::fillPortsParameters()
  {
      ui->baudRateBox->addItem(QStringLiteral("9600"), QSerialPort::Baud9600);
      ui->baudRateBox->addItem(QStringLiteral("19200"), QSerialPort::Baud19200);
      ui->baudRateBox->addItem(QStringLiteral("38400"), QSerialPort::Baud38400);
      ui->baudRateBox->addItem(QStringLiteral("115200"), QSerialPort::Baud115200);
      ui->baudRateBox->addItem(tr("Custom"));

      ui->dataBitsBox->addItem(QStringLiteral("5"), QSerialPort::Data5);
      ui->dataBitsBox->addItem(QStringLiteral("6"), QSerialPort::Data6);
      ui->dataBitsBox->addItem(QStringLiteral("7"), QSerialPort::Data7);
      ui->dataBitsBox->addItem(QStringLiteral("8"), QSerialPort::Data8);
      ui->dataBitsBox->setCurrentIndex(3);

      ui->parityBox->addItem(tr("None"), QSerialPort::NoParity);
      ui->parityBox->addItem(tr("Even"), QSerialPort::EvenParity);
      ui->parityBox->addItem(tr("Odd"), QSerialPort::OddParity);
      ui->parityBox->addItem(tr("Mark"), QSerialPort::MarkParity);
      ui->parityBox->addItem(tr("Space"), QSerialPort::SpaceParity);

      ui->stopBitsBox->addItem(QStringLiteral("1"), QSerialPort::OneStop);
  #ifdef Q_OS_WIN
      ui->stopBitsBox->addItem(tr("1.5"), QSerialPort::OneAndHalfStop);
  #endif
      ui->stopBitsBox->addItem(QStringLiteral("2"), QSerialPort::TwoStop);

      ui->flowControlBox->addItem(tr("None"), QSerialPort::NoFlowControl);
      ui->flowControlBox->addItem(tr("RTS/CTS"), QSerialPort::HardwareControl);
      ui->flowControlBox->addItem(tr("XON/XOFF"), QSerialPort::SoftwareControl);
  }

  void SettingsDialog::fillPortsInfo()
  {
      ui->serialPortInfoListBox->clear();
      QString description;
      QString manufacturer;
      QString serialNumber;
      const auto infos = QSerialPortInfo::availablePorts();
      for (const QSerialPortInfo &info : infos) {
          QStringList list;
          description = info.description();
          manufacturer = info.manufacturer();
          serialNumber = info.serialNumber();
          list << info.portName()
               << (!description.isEmpty() ? description : blankString)
               << (!manufacturer.isEmpty() ? manufacturer : blankString)
               << (!serialNumber.isEmpty() ? serialNumber : blankString)
               << info.systemLocation()
               << (info.vendorIdentifier() ? QString::number(info.vendorIdentifier(), 16) : blankString)
               << (info.productIdentifier() ? QString::number(info.productIdentifier(), 16) : blankString);

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

      ui->serialPortInfoListBox->addItem(tr("Custom"));
  }

  void SettingsDialog::updateSettings()
  {
      currentSettings.name = ui->serialPortInfoListBox->currentText();

      if (ui->baudRateBox->currentIndex() == 4) {
          currentSettings.baudRate = ui->baudRateBox->currentText().toInt();
      } else {
          currentSettings.baudRate = static_cast<QSerialPort::BaudRate>(
                      ui->baudRateBox->itemData(ui->baudRateBox->currentIndex()).toInt());
      }
      currentSettings.stringBaudRate = QString::number(currentSettings.baudRate);

      currentSettings.dataBits = static_cast<QSerialPort::DataBits>(
                  ui->dataBitsBox->itemData(ui->dataBitsBox->currentIndex()).toInt());
      currentSettings.stringDataBits = ui->dataBitsBox->currentText();

      currentSettings.parity = static_cast<QSerialPort::Parity>(
                  ui->parityBox->itemData(ui->parityBox->currentIndex()).toInt());
      currentSettings.stringParity = ui->parityBox->currentText();

      currentSettings.stopBits = static_cast<QSerialPort::StopBits>(
                  ui->stopBitsBox->itemData(ui->stopBitsBox->currentIndex()).toInt());
      currentSettings.stringStopBits = ui->stopBitsBox->currentText();

      currentSettings.flowControl = static_cast<QSerialPort::FlowControl>(
                  ui->flowControlBox->itemData(ui->flowControlBox->currentIndex()).toInt());
      currentSettings.stringFlowControl = ui->flowControlBox->currentText();

      currentSettings.localEchoEnabled = ui->localEchoCheckBox->isChecked();
  }