CeylanCallableEventSource.h

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/* 
 * Copyright (C) 2003-2009 Olivier Boudeville
 *
 * This file is part of the Ceylan library.
 *
 * The Ceylan library is free software: you can redistribute it and/or modify
 * it under the terms of either the GNU Lesser General Public License or
 * the GNU General Public License, as they are published by the Free Software
 * Foundation, either version 3 of these Licenses, or (at your option) 
 * any later version.
 *
 * The Ceylan 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 and the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License and the GNU General Public License along with the Ceylan library.
 * If not, see <http://www.gnu.org/licenses/>.
 *
 * Author: Olivier Boudeville (olivier.boudeville@esperide.com)
 *
 */


#ifndef CEYLAN_CALLABLE_EVENT_SOURCE_H_
#define CEYLAN_CALLABLE_EVENT_SOURCE_H_


#include "CeylanEventSource.h"      // for inheritance


#include <string>
#include <list>


namespace Ceylan
{



    // Event sources send events.
    class Event ;


    // Sources are talking to Listeners.    
    class EventListener ;


    // Special Listeners can call sources to retrieve events.   
    class CallerEventListener ;
    
    

    class CEYLAN_DLL CallableEventSource : public EventSource
    {


        public:
                
                    
                    
            CallableEventSource() ;
                
                
                
            explicit CallableEventSource( EventListener & listener ) ;
            
                
                                    
            virtual ~CallableEventSource() throw() ;
            
            
            
            virtual const Event & getEventFor( 
                const CallerEventListener & listener ) = 0 ;
                
                
                
            virtual const std::string toString( 
                Ceylan::VerbosityLevels level = Ceylan::high ) const ;
            


                 
        private:
        
        
        
            CallableEventSource( const CallableEventSource & source ) ;
            
            
            
            CallableEventSource & operator = ( 
                const CallableEventSource & source ) ;
                
                        
    } ; 

}



#endif // CEYLAN_CALLABLE_EVENT_SOURCE_H_

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