listnames.cpp

QT 开发环境里面一个很重要的文件

/****************************************************************************
 **
 ** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.
 **
 ** This file is part of the example classes of the Qt Toolkit.
 **
 ** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at [e-mail].
 **
 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 **
 ****************************************************************************/

#include <QtCore/QCoreApplication>
#include <QtCore/QDebug>
#include <QtCore/QStringList>
#include <QtDBus/QtDBus>

void method1()
{
    qDebug() << "Method 1:";

    QDBusReply<QStringList> reply = QDBusConnection::sessionBus().interface()->registeredServiceNames();
    if (!reply.isValid()) {
        qDebug() << "Error:" << reply.error().message();
        exit(1);
    }
    foreach (QString name, reply.value())
        qDebug() << name;
}

void method2()
{
    qDebug() << "Method 2:";

    QDBusConnection bus = QDBusConnection::sessionBus();
    QDBusInterface dbus_iface("org.freedesktop.DBus", "/org/freedesktop/DBus",
                              "org.freedesktop.DBus", bus);
    qDebug() << dbus_iface.call("ListNames").arguments().at(0);
}

void method3()
{
    qDebug() << "Method 3:";
    qDebug() << QDBusConnection::sessionBus().interface()->registeredServiceNames().value();
}

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

    if (!QDBusConnection::sessionBus().isConnected()) {
        fprintf(stderr, "Cannot connect to the D-BUS session bus.\n"
                "To start it, run:\n"
                "\teval `dbus-launch --auto-syntax`\n");
        return 1;
    }

    method1();
    method2();
    method3();

    return 0;
}