mainwindow.cpp Example File

terminal/mainwindow.cpp
 /****************************************************************************
 **
 ** Copyright (C) 2012 Denis Shienkov <denis.shienkov@gmail.com>
 ** Copyright (C) 2012 Laszlo Papp <lpapp@kde.org>
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 ** 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 <QLabel>
 #include <QMessageBox>

 MainWindow::MainWindow(QWidget *parent) :
     QMainWindow(parent),
     m_ui(new Ui::MainWindow),
     m_status(new QLabel),
     m_console(new Console),
     m_settings(new SettingsDialog),
     m_serial(new QSerialPort(this))
 {
     m_ui->setupUi(this);
     m_console->setEnabled(false);
     setCentralWidget(m_console);

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

     m_ui->statusBar->addWidget(m_status);

     initActionsConnections();

     connect(m_serial, &QSerialPort::errorOccurred, this, &MainWindow::handleError);

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

 MainWindow::~MainWindow()
 {
     delete m_settings;
     delete m_ui;
 }

 void MainWindow::openSerialPort()
 {
     const SettingsDialog::Settings p = m_settings->settings();
     m_serial->setPortName(p.name);
     m_serial->setBaudRate(p.baudRate);
     m_serial->setDataBits(p.dataBits);
     m_serial->setParity(p.parity);
     m_serial->setStopBits(p.stopBits);
     m_serial->setFlowControl(p.flowControl);
     if (m_serial->open(QIODevice::ReadWrite)) {
         m_console->setEnabled(true);
         m_console->setLocalEchoEnabled(p.localEchoEnabled);
         m_ui->actionConnect->setEnabled(false);
         m_ui->actionDisconnect->setEnabled(true);
         m_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"), m_serial->errorString());

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

 void MainWindow::closeSerialPort()
 {
     if (m_serial->isOpen())
         m_serial->close();
     m_console->setEnabled(false);
     m_ui->actionConnect->setEnabled(true);
     m_ui->actionDisconnect->setEnabled(false);
     m_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)
 {
     m_serial->write(data);
 }

 void MainWindow::readData()
 {
     const QByteArray data = m_serial->readAll();
     m_console->putData(data);
 }

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

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

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