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/*************************************************************************
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: state.hxx,v $
*
* $Revision: 1.4 $
*
* last change: $Author: kz $ $Date: 2006-12-13 16:04:32 $
*
* The Contents of this file are made available subject to
* the terms of GNU Lesser General Public License Version 2.1.
*
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2005 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
************************************************************************/
#ifndef _SLIDESHOW_STATE_HXX
#define _SLIDESHOW_STATE_HXX
#include <sal/types.h>
#include <boost/shared_ptr.hpp>
/* Definition of State interface */
namespace slideshow
{
namespace internal
{
/** This interface represents a stateful object.
The state ID returned by the getStateId() method
abstractly encodes the object's state. When this ID
changes, clients can assume that the object's state has
changed.
*/
class State
{
public:
virtual ~State() {}
/// Abstract, numerically encoded state ID
typedef ::std::size_t StateId;
/** This method returns a numerical state identifier.
The state ID returned by this method abstractly
encodes the object's state. When this ID changes,
clients can assume that the object's state has
changed.
@return an abstract, numerical state ID.
*/
virtual StateId getStateId() const = 0;
};
typedef ::boost::shared_ptr< State > StateSharedPtr;
}
}
#endif /* _SLIDESHOW_STATE_HXX */
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