kmail/isubject.h

   1 /*  -*- mode: C++; c-file-style: "gnu" -*-
   2  *
   3  *  This file is part of KMail, the KDE mail client.
   4  *  Copyright (c) 2003 Carsten Burghardt <burghardt@kde.org>
   5  *
   6  *  KMail is free software; you can redistribute it and/or modify it
   7  *  under the terms of the GNU General Public License, version 2, as
   8  *  published by the Free Software Foundation.
   9  *
  10  *  KMail is distributed in the hope that it will be useful, but
  11  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  *  General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  18  *
  19  *  In addition, as a special exception, the copyright holders give
  20  *  permission to link the code of this program with any edition of
  21  *  the Qt library by Trolltech AS, Norway (or with modified versions
  22  *  of Qt that use the same license as Qt), and distribute linked
  23  *  combinations including the two.  You must obey the GNU General
  24  *  Public License in all respects for all of the code used other than
  25  *  Qt.  If you modify this file, you may extend this exception to
  26  *  your version of the file, but you are not obligated to do so.  If
  27  *  you do not wish to do so, delete this exception statement from
  28  *  your version.
  29  */
  30
  31 #ifndef __KMAIL_ISUBJECT_H__
  32 #define __KMAIL_ISUBJECT_H__
  33
  34 #include "interfaces/observable.h"
  35 #include <QVector>
  36
  37
  38 namespace KMail {
  39
  40   namespace Interface {
  41     class Observer;
  42   }
  43
  44   class ISubject : public Interface::Observable {
  45   public :
  46       virtual ~ISubject();
  47
  48       /** \reimp Attach the observer if it is not in the list yet */
  49       void attach( Interface::Observer * );
  50
  51       /** \reimp Detach the observer */
  52       void detach( Interface::Observer * );
  53
  54       /** \reimp Notify all observers ( call observer->update() ) */
  55       void notify();
  56
  57   private:
  58       QVector<Interface::Observer*> mObserverList;
  59   };
  60
  61 } // namespace KMail
  62
  63 #endif // __KMAIL_ISUBJECT_H__