qt-creator/share/qtcreator/templates/wizards/projects/qtquickapplication/main.cpp

%{Cpp:LicenseTemplate}\
%{JS: QtSupport.qtIncludes([], ["QtGui/QGuiApplication", "QtQml/QQmlApplicationEngine"])}
int main(int argc, char *argv[])
{
@if %{UseVirtualKeyboard}
    qputenv("QT_IM_MODULE", QByteArray("qtvirtualkeyboard"));

@endif
@if %{SetQPAPhysicalSize}
    if (qEnvironmentVariableIsEmpty("QTGLESSTREAM_DISPLAY")) {
        qputenv("QT_QPA_EGLFS_PHYSICAL_WIDTH", QByteArray("213"));
        qputenv("QT_QPA_EGLFS_PHYSICAL_HEIGHT", QByteArray("120"));

        QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
    }
@else
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
@endif

    QGuiApplication app(argc, argv);

    QQmlApplicationEngine engine;

    const QUrl mainQml(QStringLiteral("qrc:/main.qml"));

    // Catch the objectCreated signal, so that we can determine if the root component was loaded
    // successfully. If not, then the object created from it will be null. The root component may
    // get loaded asynchronously.
    const QMetaObject::Connection connection = QObject::connect(
                &engine, &QQmlApplicationEngine::objectCreated,
                &app, [&](QObject *object, const QUrl &url) {
        if (url != mainQml)
            return;

        if (!object)
            app.exit(-1);
        else
            QObject::disconnect(connection);
    }, Qt::QueuedConnection);

    engine.load(mainQml);

    return app.exec();
}