#!/usr/bin/env python


#############################################################################
##
## Copyright (C) 2011 Riverbank Computing Limited.
## Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
## All rights reserved.
##
## This file is part of the examples of PyQt.
##
## $QT_BEGIN_LICENSE:BSD$
## 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 Nokia Corporation and its Subsidiary(-ies) nor
##     the names of its contributors may be used to endorse or promote
##     products derived from this software without specific prior written
##     permission.
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## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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## $QT_END_LICENSE$
##
#############################################################################


# This is only needed for Python v2 but is harmless for Python v3.
import sip
sip.setapi('QString', 2)

import sys
from PyQt4 import QtCore, QtDBus


class Pong(QtCore.QObject):

    @QtCore.pyqtSlot(str, result=str)
    def ping(self, arg):
        QtCore.QMetaObject.invokeMethod(QtCore.QCoreApplication.instance(),
                'quit')

        return "ping(\"%s\") got called" % arg


if __name__ == '__main__':
    app = QtCore.QCoreApplication(sys.argv)

    if not QtDBus.QDBusConnection.sessionBus().isConnected():
        sys.stderr.write("Cannot connect to the D-Bus session bus.\n"
                "To start it, run:\n"
                "\teval `dbus-launch --auto-syntax`\n");
        sys.exit(1)

    if not QtDBus.QDBusConnection.sessionBus().registerService('com.trolltech.QtDBus.PingExample'):
        sys.stderr.write("%s\n" % QtDBus.QDBusConnection.sessionBus().lastError().message())
        sys.exit(1)

    pong = Pong()
    QtDBus.QDBusConnection.sessionBus().registerObject('/', pong,
            QtDBus.QDBusConnection.ExportAllSlots)

    sys.exit(app.exec_())
