int main(int argc, char *argv[])
{
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
#endif

    QGuiApplication app(argc, argv);
    QmlCBridge c_app;

    QQmlApplicationEngine engine;
    const QUrl url(QStringLiteral("qrc:/main.qml"));
    QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,
                     &app, [url](QObject *obj, const QUrl &objUrl) {
        if (!obj && url == objUrl)
            QCoreApplication::exit(-1);
    }, Qt::QueuedConnection);
    engine.load(url);

    QQmlContext *root = engine.rootContext();
    root->setContextProperty("app", &c_app);

    QObject *component = engine.rootObjects().first();
    c_app.setComponent(component);

    WId window = qobject_cast<QWindow*>(component)->winId();
    Display *display = QX11Info::display();

    // make window visible on all desktops
    unsigned long data = 0xffffffff; // all desktop
    XChangeProperty (display, window,
                     XInternAtom(display, "_NET_WM_DESKTOP", False),
                     XA_CARDINAL,
                     32,
                     PropModeReplace,
                     reinterpret_cast<unsigned char *>(&data),
                     1);

    // make window pass-through
    XRectangle rect;
    XserverRegion region = XFixesCreateRegion(display, &rect, 1);
    XFixesSetWindowShapeRegion(display, window, ShapeInput, 0, 0, region);
    XFixesSetWindowShapeRegion (display, window, ShapeBounding, 0, 0, 0);
    XFixesDestroyRegion(display, region);

    XMapWindow(display, window);
    XFlush(display);

    int status = app.exec();
    return status;
}