mainwindow.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 "mainwindow.h"
  #include "ui_mainwindow.h"
  #include "console.h"
  #include "settingsdialog.h"

  #include <QMessageBox>
  #include <QLabel>
  #include <QtSerialPort/QSerialPort>

  MainWindow::MainWindow(QWidget *parent) :
      QMainWindow(parent),
      ui(new Ui::MainWindow)
  {
      ui->setupUi(this);
      console = new Console;
      console->setEnabled(false);
      setCentralWidget(console);
      serial = new QSerialPort(this);
      settings = new SettingsDialog;

      ui->actionConnect->setEnabled(true);
      ui->actionDisconnect->setEnabled(false);
      ui->actionQuit->setEnabled(true);
      ui->actionConfigure->setEnabled(true);

      status = new QLabel;
      ui->statusBar->addWidget(status);

      initActionsConnections();

      connect(serial, static_cast<void (QSerialPort::*)(QSerialPort::SerialPortError)>(&QSerialPort::error),
              this, &MainWindow::handleError);

      connect(serial, &QSerialPort::readyRead, this, &MainWindow::readData);
      connect(console, &Console::getData, this, &MainWindow::writeData);
  }

  MainWindow::~MainWindow()
  {
      delete settings;
      delete ui;
  }

  void MainWindow::openSerialPort()
  {
      SettingsDialog::Settings p = settings->settings();
      serial->setPortName(p.name);
      serial->setBaudRate(p.baudRate);
      serial->setDataBits(p.dataBits);
      serial->setParity(p.parity);
      serial->setStopBits(p.stopBits);
      serial->setFlowControl(p.flowControl);
      if (serial->open(QIODevice::ReadWrite)) {
          console->setEnabled(true);
          console->setLocalEchoEnabled(p.localEchoEnabled);
          ui->actionConnect->setEnabled(false);
          ui->actionDisconnect->setEnabled(true);
          ui->actionConfigure->setEnabled(false);
          showStatusMessage(tr("Connected to %1 : %2, %3, %4, %5, %6")
                            .arg(p.name).arg(p.stringBaudRate).arg(p.stringDataBits)
                            .arg(p.stringParity).arg(p.stringStopBits).arg(p.stringFlowControl));
      } else {
          QMessageBox::critical(this, tr("Error"), serial->errorString());

          showStatusMessage(tr("Open error"));
      }
  }

  void MainWindow::closeSerialPort()
  {
      if (serial->isOpen())
          serial->close();
      console->setEnabled(false);
      ui->actionConnect->setEnabled(true);
      ui->actionDisconnect->setEnabled(false);
      ui->actionConfigure->setEnabled(true);
      showStatusMessage(tr("Disconnected"));
  }

  void MainWindow::about()
  {
      QMessageBox::about(this, tr("About Simple Terminal"),
                         tr("The <b>Simple Terminal</b> example demonstrates how to "
                            "use the Qt Serial Port module in modern GUI applications "
                            "using Qt, with a menu bar, toolbars, and a status bar."));
  }

  void MainWindow::writeData(const QByteArray &data)
  {
      serial->write(data);
  }

  void MainWindow::readData()
  {
      QByteArray data = serial->readAll();
      console->putData(data);
  }

  void MainWindow::handleError(QSerialPort::SerialPortError error)
  {
      if (error == QSerialPort::ResourceError) {
          QMessageBox::critical(this, tr("Critical Error"), serial->errorString());
          closeSerialPort();
      }
  }

  void MainWindow::initActionsConnections()
  {
      connect(ui->actionConnect, &QAction::triggered, this, &MainWindow::openSerialPort);
      connect(ui->actionDisconnect, &QAction::triggered, this, &MainWindow::closeSerialPort);
      connect(ui->actionQuit, &QAction::triggered, this, &MainWindow::close);
      connect(ui->actionConfigure, &QAction::triggered, settings, &MainWindow::show);
      connect(ui->actionClear, &QAction::triggered, console, &Console::clear);
      connect(ui->actionAbout, &QAction::triggered, this, &MainWindow::about);
      connect(ui->actionAboutQt, &QAction::triggered, qApp, &QApplication::aboutQt);
  }

  void MainWindow::showStatusMessage(const QString &message)
  {
      status->setText(message);
  }