- Qt 5.5
- Qt D-Bus
- D-Bus List Names Example
- listnames.cpp Example File
- Qt 5.5.1 Reference Documentation

# listnames.cpp Example File

listnames/listnames.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:
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    #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;
    }