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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 _VCL_IMPDEL_HXX
#define _VCL_IMPDEL_HXX
#include <list>
namespace vcl
{
class DeletionListener;
class DeletionNotifier
{
std::list< DeletionListener* > m_aListeners;
protected:
DeletionNotifier() {}
~DeletionNotifier()
{ notifyDelete(); }
inline void notifyDelete();
public:
void addDel( DeletionListener* pListener )
{ m_aListeners.push_back( pListener ); }
void removeDel( DeletionListener* pListener )
{ m_aListeners.remove( pListener ); }
};
class DeletionListener
{
DeletionNotifier* m_pNotifier;
public:
DeletionListener( DeletionNotifier* pNotifier )
: m_pNotifier( pNotifier )
{
if( m_pNotifier )
m_pNotifier->addDel( this );
}
~DeletionListener()
{
if( m_pNotifier )
m_pNotifier->removeDel( this );
}
void deleted() { m_pNotifier = NULL; }
bool isDeleted() const { return (m_pNotifier == NULL); }
};
inline void DeletionNotifier::notifyDelete()
{
for( std::list< DeletionListener* >::const_iterator it =
m_aListeners.begin(); it != m_aListeners.end(); ++it )
(*it)->deleted();
m_aListeners.clear();
}
} // namespace vcl
#endif // _VCL_IMPDEL_HXX
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