Qt Reference Documentation

- Qt 4.8
- ALL VERSIONS

- A
- A
- A
- Print

# complexpong.cpp Example File

dbus/complexpingpong/complexpong.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** You may use this file under the terms of the BSD license as follows:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
     ** met:
     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
     **   * Redistributions in binary form must reproduce the above copyright
     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
     **   * Neither the name of The Qt Company Ltd nor the names of its
     **     contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
     **
     **
     ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
     **
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #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.indexOf("the answer to life, the universe and everything") != -1)
             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;
     }