isubject.h
00001 /* -*- mode: C++; c-file-style: "gnu" -*- 00002 * 00003 * This file is part of KMail, the KDE mail client. 00004 * Copyright (c) 2003 Carsten Burghardt <burghardt@kde.org> 00005 * 00006 * KMail is free software; you can redistribute it and/or modify it 00007 * under the terms of the GNU General Public License, version 2, as 00008 * published by the Free Software Foundation. 00009 * 00010 * KMail is distributed in the hope that it will be useful, but 00011 * WITHOUT ANY WARRANTY; without even the implied warranty of 00012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00013 * General Public License for more details. 00014 * 00015 * You should have received a copy of the GNU General Public License 00016 * along with this program; if not, write to the Free Software 00017 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00018 * 00019 * In addition, as a special exception, the copyright holders give 00020 * permission to link the code of this program with any edition of 00021 * the Qt library by Trolltech AS, Norway (or with modified versions 00022 * of Qt that use the same license as Qt), and distribute linked 00023 * combinations including the two. You must obey the GNU General 00024 * Public License in all respects for all of the code used other than 00025 * Qt. If you modify this file, you may extend this exception to 00026 * your version of the file, but you are not obligated to do so. If 00027 * you do not wish to do so, delete this exception statement from 00028 * your version. 00029 */ 00030 00031 #ifndef _SUBJECT 00032 #define _SUBJECT 00033 00034 #include <qptrlist.h> 00035 00036 namespace KMail { 00037 00038 class IObserver; 00039 00040 class ISubject 00041 { 00042 public : 00043 virtual ~ISubject(); 00044 00045 public : 00047 virtual void attach( IObserver * ); 00048 00050 virtual void detach( IObserver * ); 00051 00053 virtual void notify(); 00054 00055 // Protected constructor and attribute(s) 00056 protected : 00057 ISubject(); 00058 QPtrList<IObserver> mObserverList; 00059 }; 00060 00061 } // namespace KMail 00062 00063 #endif