#include <QCoreApplication>
#include <QObject>
#include <QDBusConnection>

class Test : public QObject
{
    Q_OBJECT;
    Q_CLASSINFO("D-Bus Interface", "test.Test");
public Q_SLOTS:
    void emitSignal1(const QString &s) { Q_EMIT signal1(s); }
Q_SIGNALS:
    void signal1(const QString &s);
};

class SubTest : public Test
{
    Q_OBJECT;
    Q_CLASSINFO("D-Bus Interface", "test.SubTest");
public Q_SLOTS:
    void emitSignal2(const QString &s) { Q_EMIT signal2(s); }
Q_SIGNALS:
    void signal2(const QString &s);
};

int main(int argc, char **argv)
{
    QCoreApplication app(argc, argv);

    QDBusConnection connection = QDBusConnection::sessionBus();
    connection.registerService("test.Test");

    Test base; // signal1 works
    connection.registerObject("/base", &base, QDBusConnection::ExportAllContents);

    SubTest sub; // signal1 isn't emitted via D-Bus, slot *is* invoked, signal2 works
    connection.registerObject("/sub", &sub, QDBusConnection::ExportAllContents);

    return app.exec();
}

#include "play.moc"