delegate.h

//-----------------------------------------------------------------------------
// Application Core Library
// Copyright (c) 2009-2012 DuJardin Consulting, LLC.
// Portions Copyright (c) 2009 GarageGames, Inc.
//-----------------------------------------------------------------------------

#ifndef _UTIL_DELEGATE_H_
#define _UTIL_DELEGATE_H_

#include "core/util/FastDelegate.h"

/// Define a Delegate
///
/// This macro allows translation of Delegate definitions into a target
/// delegate implementation.  
///
/// By default ACLib uses a @see FastDelegate implementation
/// 

namespace ACLib
{

   #define Delegate fastdelegate::FastDelegate
   typedef fastdelegate::DelegateMemento DelegateMemento;

   template<class T>
   class DelegateRemapper : public DelegateMemento
   {
   public:
      DelegateRemapper() : mOffset(0) {}

      void set(T * t, const DelegateMemento & memento)
      {
         SetMementoFrom(memento);
         if (m_pthis)
            mOffset = ((int)m_pthis) - ((int)t);
      }

      void rethis(T * t)
      {
         if (m_pthis)
            m_pthis = (fastdelegate::detail::GenericClass *)(mOffset + (int)t);
      }

   protected:
      int mOffset;
   };
};
#endif