QGuiApplication Sınıfı

exec metodu
Şöyle yaparız.

int main(int argc, char *argv[])
{
  QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);

  QGuiApplication app(argc, argv);


  QQmlApplicationEngine engine;
  engine.load(QUrl(QStringLiteral("qrc:/main.qml")));

  if (engine.rootObjects().isEmpty())
    return -1;

  auto root = engine.rootObjects().first();
  root->installEventFilter(new EventFilter());

  return app.exec();
}