- Qt 5.5
- Qt Network
- Network Chat Example
- main.cpp Example File
- Qt 5.5.1 Reference Documentation

# main.cpp Example File

network-chat/main.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the examples of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
    ** You may use this file under the terms of the BSD license as follows:
    **
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    #include <QApplication>

    #include "chatdialog.h"

    #include <QtCore/QSettings>
    #include <QtNetwork/QNetworkConfigurationManager>
    #include <QtNetwork/QNetworkSession>

    int main(int argc, char *argv[])
    {
        QApplication app(argc, argv);

        QNetworkConfigurationManager manager;
        if (manager.capabilities() & QNetworkConfigurationManager::NetworkSessionRequired) {
            // Get saved network configuration
            QSettings settings(QSettings::UserScope, QLatin1String("QtProject"));
            settings.beginGroup(QLatin1String("QtNetwork"));
            const QString id = settings.value(QLatin1String("DefaultNetworkConfiguration")).toString();
            settings.endGroup();

            // If the saved network configuration is not currently discovered use the system default
            QNetworkConfiguration config = manager.configurationFromIdentifier(id);
            if ((config.state() & QNetworkConfiguration::Discovered) !=
                QNetworkConfiguration::Discovered) {
                config = manager.defaultConfiguration();
            }

            QNetworkSession *networkSession = new QNetworkSession(config, &app);
            networkSession->open();
            networkSession->waitForOpened();

            if (networkSession->isOpen()) {
                // Save the used configuration
                QNetworkConfiguration config = networkSession->configuration();
                QString id;
                if (config.type() == QNetworkConfiguration::UserChoice) {
                    id = networkSession->sessionProperty(
                            QLatin1String("UserChoiceConfiguration")).toString();
                } else {
                    id = config.identifier();
                }

                QSettings settings(QSettings::UserScope, QLatin1String("QtProject"));
                settings.beginGroup(QLatin1String("QtNetwork"));
                settings.setValue(QLatin1String("DefaultNetworkConfiguration"), id);
                settings.endGroup();
            }
        }

        ChatDialog dialog;
        dialog.show();
        return app.exec();
    }