/*
   Copyright (C) 2001-2006, William Joseph.
   All Rights Reserved.

   This file is part of GtkRadiant.

   GtkRadiant is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   GtkRadiant 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with GtkRadiant; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#if !defined( INCLUDED_MODULEOBSERVERS_H )
#define INCLUDED_MODULEOBSERVERS_H

#include "debugging/debugging.h"
#include <set>
#include "moduleobserver.h"

class ModuleObservers
{
typedef std::set<ModuleObserver*> Observers;
Observers m_observers;
public:
~ModuleObservers(){
	ASSERT_MESSAGE( m_observers.empty(), "ModuleObservers::~ModuleObservers: observers still attached" );
}
void attach( ModuleObserver& observer ){
	ASSERT_MESSAGE( m_observers.find( &observer ) == m_observers.end(), "ModuleObservers::attach: cannot attach observer" );
	m_observers.insert( &observer );
}
void detach( ModuleObserver& observer ){
	ASSERT_MESSAGE( m_observers.find( &observer ) != m_observers.end(), "ModuleObservers::detach: cannot detach observer" );
	m_observers.erase( &observer );
}
void realise(){
	for ( Observers::iterator i = m_observers.begin(); i != m_observers.end(); ++i )
	{
		( *i )->realise();
	}
}
void unrealise(){
	for ( Observers::reverse_iterator i = m_observers.rbegin(); i != m_observers.rend(); ++i )
	{
		( *i )->unrealise();
	}
}
};

#endif