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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#ifndef INCLUDED_SLIDESHOW_STATE_HXX
#define INCLUDED_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 /* INCLUDED_SLIDESHOW_STATE_HXX */
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