engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
QObject *root = engine.rootObjects().first();
QQuickWindow *window = qobject_cast<QQuickWindow *>(root);
QObject::connect(window, SIGNAL(frameSwapped()), layoutHandler, SLOT(slotActivateSurface()));
engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
QObject *root = engine.rootObjects().first();
QQuickWindow *window = qobject_cast<QQuickWindow *>(root);
QObject::connect(window, SIGNAL(frameSwapped()), layoutHandler, SLOT(slotActivateSurface()));