OMKObjectHandle.h

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/*
 * This file is part of openMask © INRIA, CNRS, Universite de Rennes 1 1993-2002, thereinafter the Software
 * 
 * The Software has been developped within the Siames Project. 
 * INRIA, the University of Rennes 1 and CNRS jointly hold intellectual property rights
 * 
 * The Software has been registered with the Agence pour la Protection des
 * Programmes (APP) under registration number IDDN.FR.001.510008.00.S.P.2001.000.41200
 *
 * This file may be distributed under the terms of the Q Public License
 * version 1.0 as defined by Trolltech AS of Norway and appearing in the file
 * LICENSE.QPL included in the packaging of this file.
 *
 * Licensees holding valid specific licenses issued by INRIA, CNRS or Université de Rennes 1 
 * for the software may use this file in accordance with that specific license 
 *
 */
#ifndef ObjectHandleHEADER
#define ObjectHandleHEADER




#include <OMKFlowable.h>

namespace OMK
{ 
class Event ;
class EventIdentifier ;
class EventListener ;
class Name;
class OutputNT ;
class SimulatedObject ; 
typedef enum {
   SynchronisationMessage, 
   InitialValuesMessage, 
   Registration, 
   CancelRegistration, 
   GET_ALL_PARAM,
   GET_PARAM, 
   EventReceived, 
   RegisterForSignal, 
   CancelRegistrationForSignal
} RequestType;

class OMK_API ObjectHandle : public Flowable
{
public:
   ObjectHandle (SimulatedObject & objet);

   virtual ~ObjectHandle();
      
   virtual void notifyChangeInControlParameter(OutputNT *) ;


   virtual bool controlParametersChanged(bool keepChanged = false ) ;

   virtual void receiveEvent (const Event & event) = 0 ;


   virtual void receiveEvent (Event * event) = 0 ;


   virtual void registerEventListenerForEvent ( EventListener & eventListener, 
                                                const EventIdentifier & eventId ) ;

   virtual void unregisterEventListener( EventListener & eventListener ) ;

   virtual void sendEventsForSignal( Event & event , const EventIdentifier & sigId ) = 0 ;


   virtual bool receiveRegistrationForSignal ( const EventIdentifier & sigId, 
                                               const Name & registrant, 
                                               const EventIdentifier & eventId ) = 0 ;


   virtual bool cancelRegistrationForSignal ( const EventIdentifier & sigId, 
                                               const Name & registrant ) = 0 ;


   const SimulatedObject & getSimulatedObject () const ;


   SimulatedObject & getSimulatedObject ()  ;

protected:
   friend class KernelAttribute ;

   virtual void attributeRead() ;

   virtual bool getAttributeRead ( bool keepChanged = false ) ;

protected:
   SimulatedObject & _myObject;  

   bool _attributeRead ;

   bool _aControlParameterHasChanged;

   bool _migrationCase ;
}; // ObjectHandle
} //namespace OMK

#endif

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