vlObservee.h

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/*********************************************************************
** Copyright (c) 1992-2010 VT MAK
** All rights reserved.
*********************************************************************/
#pragma once


#include "vlList.h"
#include "vlMachineTypes.h"

#ifdef DtUSE_UTILITIES_NAMESPACE
namespace DtUSE_UTILITIES_NAMESPACE
{
#endif

class DT_DLL_VLUTIL DtAbsNotifyObserver;

class DT_DLL_VLUTIL DtObservee
{
public:

   enum DtWhyNotifyObserver
   {
      DtPendingDeleteOfYourObserved,

      DtDeleteOfYourObserved
   };

public:

   DtObservee();

   virtual ~DtObservee();

   DtObservee(const DtObservee& orig);

   DtObservee& operator=(const DtObservee& orig);

   virtual bool registerObservedBy(DtAbsNotifyObserver* observer);

   virtual bool deRegisterObservedBy(DtAbsNotifyObserver* observer);

   virtual void notifyAllObservers(const DtWhyNotifyObserver& why);

public:

   static void destroy(DtObservee* object);

protected:

   void internalNotifyAllObservers(const DtWhyNotifyObserver& why);

protected:

   DtList myObservedByNotifiers;
   bool myNotifiedPendingDelete;
};

#ifdef DtUSE_UTILITIES_NAMESPACE
} 
#endif