#include <QMainWindow>
#include <QApplication>
#include <QDebug>
#include <QAbstractNativeEventFilter>
#include <QAbstractEventDispatcher>

#define WORK_AROUND 1



#if defined(WORK_AROUND) && WORK_AROUND && defined(_WIN32)

#include <windows.h>

class WindowsEventFilter : public QAbstractNativeEventFilter {
    bool nativeEventFilter(const QByteArray &eventType, void *message, long *result);
};

bool WindowsEventFilter::nativeEventFilter(const QByteArray &eventType, void *message, long *result) {
    Q_UNUSED(eventType);
    Q_UNUSED(result);

    MSG* msg = (MSG*)(message);
    if((msg->message == WM_CLOSE) && (msg->hwnd == 0)){
        QMetaObject::invokeMethod(QApplication::instance(), "quit", Qt::QueuedConnection);
        return true;
    }

    return false;
}
#endif // WORK_AROUND && _WIN32



int main(int argc, char *argv[]) {
    QApplication app(argc, argv);

    //disable this and it works correctly
    app.setQuitOnLastWindowClosed(false);

#if defined(WORK_AROUND) && WORK_AROUND && defined(_WIN32)
    QCoreApplication::eventDispatcher()->installNativeEventFilter(new WindowsEventFilter());
#endif // WORK_AROUND && _WIN32

    QMainWindow window;
    window.show();
    QMetaObject::invokeMethod(&window, "close", Qt::QueuedConnection);

    int result = app.exec();
    qDebug() << "Clean exit !!!";
    return result;
}