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# complexpong.cpp Example File
dbus/complexpingpong/complexpong.cpp

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     #include <stdio.h>
     #include <stdlib.h>

     #include <QtCore/QCoreApplication>
     #include <QtCore/QTimer>
     #include <QtDBus/QtDBus>

     #include "ping-common.h"
     #include "complexpong.h"

     // the property
     QString Pong::value() const
     {
         return m_value;
     }

     void Pong::setValue(const QString &newValue)
     {
         m_value = newValue;
     }

     void Pong::quit()
     {
         QTimer::singleShot(0, QCoreApplication::instance(), SLOT(quit()));
     }

     QDBusVariant Pong::query(const QString &query)
     {
         QString q = query.toLower();
         if (q == "hello")
             return QDBusVariant("World");
         if (q == "ping")
             return QDBusVariant("Pong");
         if (q == "the answer to life, the universe and everything")
             return QDBusVariant(42);
         if (q.indexOf("unladen swallow") != -1) {
             if (q.indexOf("european") != -1)
                 return QDBusVariant(11.0);
             return QDBusVariant(QByteArray("african or european?"));
         }

         return QDBusVariant("Sorry, I don't know the answer");
     }

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

         QObject obj;
         Pong *pong = new Pong(&obj);
         pong->connect(&app, SIGNAL(aboutToQuit()), SIGNAL(aboutToQuit()));
         pong->setProperty("value", "initial value");
         QDBusConnection::sessionBus().registerObject("/", &obj);

         if (!QDBusConnection::sessionBus().registerService(SERVICE_NAME)) {
             fprintf(stderr, "%s\n",
                     qPrintable(QDBusConnection::sessionBus().lastError().message()));
             exit(1);
         }

         app.exec();
         return 0;
     }