[OpenDocString] kdeconnect-kde (cpp)
main.cpp
int main(int argc, char *argv[])
{
    QIcon::setFallbackThemeName(QStringLiteral("breeze"));

    QGuiApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
    QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
    QApplication app(argc, argv);
    KLocalizedString::setApplicationDomain("kdeconnect-sms");
    app.setWindowIcon(QIcon::fromTheme(QStringLiteral("kdeconnect")));
    KAboutData aboutData(QStringLiteral("kdeconnect.sms"),
                         i18n("KDE Connect SMS"),
                         QStringLiteral(KDECONNECT_VERSION_STRING),
                         i18n("SMS Instant Messaging"),
                         KAboutLicense::GPL_V3,
                         i18n("(C) 2018-2022, KDE Connect Team"));
    aboutData.addAuthor(i18n("Simon Redman"), {}, QStringLiteral("simon@ergotech.com"));
    aboutData.addAuthor(i18n("Aleix Pol Gonzalez"), {}, QStringLiteral("aleixpol@kde.org"));
    aboutData.addAuthor(i18n("Nicolas Fella"), {}, QStringLiteral("nicolas.fella@gmx.de"));
    aboutData.setBugAddress(QStringLiteral("https://bugs.kde.org/enter_bug.cgi?product=kdeconnect&component=messaging-application").toUtf8());
    KAboutData::setApplicationData(aboutData);

#ifdef Q_OS_WIN
    KColorSchemeManager manager;
    QApplication::setStyle(QStringLiteral("breeze"));
#endif

    // Default to org.kde.desktop style unless the user forces another style
    if (qEnvironmentVariableIsEmpty("QT_QUICK_CONTROLS_STYLE")) {
        QQuickStyle::setStyle(QStringLiteral("org.kde.desktop"));
    }

    AppData data;

    QCommandLineParser parser;
    aboutData.setupCommandLine(&parser);
    parser.addOption(QCommandLineOption(QStringLiteral("device"), i18n("Select a device"), i18n("id")));
    parser.addOption(QCommandLineOption(QStringLiteral("message"), i18n("Send a message"), i18n("message")));
    parser.process(app);
    aboutData.processCommandLine(&parser);

    data.m_initialMessage = parser.value(QStringLiteral("message"));
    data.m_deviceId = parser.value(QStringLiteral("device"));

    KDBusService service(KDBusService::Unique);

    QObject::connect(&service, &KDBusService::activateRequested, &service, [&parser, &data](const QStringList &args, const QString & /*workDir*/) {
        parser.parse(args);

        data.m_initialMessage = parser.value(QStringLiteral("message"));
        data.m_deviceId = parser.value(QStringLiteral("device"));

        Q_EMIT data.deviceIdChanged();
        Q_EMIT data.initialMessageChanged();
    });

    qmlRegisterType("org.kde.kdeconnect.sms", 1, 0, "QSortFilterProxyModel");
    qmlRegisterType("org.kde.kdeconnect.sms", 1, 0, "ConversationModel");
    qmlRegisterType("org.kde.kdeconnect.sms", 1, 0, "ConversationListModel");

    qmlRegisterSingletonType("org.kde.kdeconnect.sms", 1, 0, "SmsHelper", SmsHelper::singletonProvider);

    qmlRegisterSingletonInstance("org.kde.kdeconnect.sms", 1, 0, "AppData", &data);

    QQmlApplicationEngine engine;
    engine.rootContext()->setContextObject(new KLocalizedContext(&engine));
    engine.addImageProvider(QStringLiteral("thumbnailsProvider"), new ThumbnailsProvider);
    engine.rootContext()->setContextProperties({{QStringLiteral("aboutData"), QVariant::fromValue(KAboutData::applicationData())}});
    engine.load(QUrl(QStringLiteral("qrc:/qml/main.qml")));

    return app.exec();
}
Sets the icon scheme "breeze" and enabled high dpi mode. Creates the application object, sets the app icon and about data, command line parser and service object.