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58 lines
1.9 KiB
58 lines
1.9 KiB
/*
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observable.h
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This file is part of KMail's plugin interface.
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Copyright (c) 2004 Marc Mutz <mutz@kde.org>
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KMail is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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KMail is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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In addition, as a special exception, the copyright holders give
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permission to link the code of this program with any edition of
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the TQt library by Trolltech AS, Norway (or with modified versions
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of TQt that use the same license as TQt), and distribute linked
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combinations including the two. You must obey the GNU General
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Public License in all respects for all of the code used other than
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TQt. If you modify this file, you may extend this exception to
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your version of the file, but you are not obligated to do so. If
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you do not wish to do so, delete this exception statement from
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your version.
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*/
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#ifndef __KMAIL_INTERFACES_OBSERVABLE_H__
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#define __KMAIL_INTERFACES_OBSERVABLE_H__
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namespace KMail {
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namespace Interface {
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class Observer;
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/**
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@short observable interface
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*/
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class Observable {
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public:
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virtual ~Observable() {}
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virtual void attach( Observer * obs ) = 0;
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virtual void detach( Observer * obs ) = 0;
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virtual void notify() = 0;
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};
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} // namespace Interface
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} // namespace KMail
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#endif // __KMAIL_INTERFACES_OBSERVABLE_H__
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