listnames.cpp Example File | Qt D-Bus

Qt 5.6 | Qt D-Bus | D-Bus List Names Example | listnames.cpp Example File

Qt 5.6.2 Reference Documentation

# listnames.cpp Example File

listnames/listnames.cpp

      /****************************************************************************
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      ** Copyright (C) 2015 The Qt Company Ltd.
      ** Contact: http://www.qt.io/licensing/
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      ** This file is part of the examples of the Qt Toolkit.
      **
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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;
      }