vlDeclNotifier.h

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

#include "vlAbsNotifyObs.h"

#define DtDECLARE_OBSERVER_NOTIFIER(ClassName)                  \
class DT_DLL_VLUTIL DtObservee;                                 \
class DT_DLL_VLUTIL ClassName##Notifier : public DtAbsNotifyObserver          \
{                                                               \
public:                                                         \
                                                                \
   ClassName##Notifier(ClassName* observer);                    \
                                                                \
   virtual ~ClassName##Notifier();                              \
                                                                \
   ClassName##Notifier(const ClassName##Notifier& orig);        \
                                                                \
   ClassName##Notifier& operator=(const ClassName##Notifier& orig); \
                                                                \
   virtual bool notifyFromObserved(DtObservee* observed,        \
      const DtObservee::DtWhyNotifyObserver& why);              \
                                                                \
protected:                                                      \
                                                                \
   ClassName* myObjectToNotify;                                 \
                                                                \
};                                                              \
                                                               


#define DtDEFINE_OBSERVER_NOTIFIER(ClassName) \
ClassName##Notifier::ClassName##Notifier(ClassName* observer) : \
   DtAbsNotifyObserver(),                                       \
   myObjectToNotify(observer)                                   \
{                                                               \
}                                                               \
                                                                \
ClassName##Notifier::~ClassName##Notifier()                     \
{                                                               \
}                                                               \
                                                                \
ClassName##Notifier::ClassName##Notifier(                       \
   const ClassName##Notifier& orig) :                           \
   DtAbsNotifyObserver(orig),                                   \
   myObjectToNotify(orig.myObjectToNotify)                      \
{                                                               \
}                                                               \
                                                                \
ClassName##Notifier& ClassName##Notifier::operator=(            \
   const ClassName##Notifier& orig)                             \
{                                                               \
   if (this == &orig)                                           \
   {                                                            \
      return *this;                                             \
   }                                                            \
                                                                \
   DtAbsNotifyObserver::operator=(orig);                        \
                                                                \
   myObjectToNotify = orig.myObjectToNotify;                    \
                                                                \
   return *this;                                                \
}                                                               \
                                                                \
bool ClassName##Notifier::notifyFromObserved(                   \
   DtObservee* observed,                                        \
   const DtObservee::DtWhyNotifyObserver& why)                  \
{                                                               \
   if (!myObjectToNotify)                                       \
   {                                                            \
      return false;                                             \
   }                                                            \
                                                                \
   myObjectToNotify->notifyFromYourObserved(observed, why);     \
                                                                \
   return true;                                                 \
}                                                               \