sprint/gtl/winclassregister.h

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/******************************************************************************
 *  GTL: GUI Template Library 
 *    A Cross Platform C++ Wrapper for Win32 users
 *  Copyright (C) 2007-2011 Paolo Medici (www.pmx.it)
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This 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 for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *******************************************************************************/

#ifndef _SPRINT_WINCLASSREGISTER_H
#define _SPRINT_WINCLASSREGISTER_H

namespace sprint {
        namespace gtl {

template<class T>
class WindowRegister {
     int registered;
     public:
      void Register(const T * win)
           {
           if(registered == 0)
                      {
                      win->Register();
                      }
           registered++;                      
           }
           
      public:
      WindowRegister() : registered(0) {}
      ~WindowRegister() {}
      };

template<class T>
class WindowSingleton {
     int registered;
     public:
      void Register(const T * win)
           {
           if(registered == 0)
                      {
                      win->Register();
                      }
           registered++;                      
           }
           
      public:
      WindowSingleton() : registered(0) {}
      ~WindowSingleton() {}
      
      static WindowSingleton<T> & Instance()
             {
             static WindowSingleton<T> _instance;
             return _instance;  
             }
      };
      
      template<class T>
      void WindowSingletonRegister(const T * win)
       {
        WindowSingleton<T>::Instance().Register(win);   
       }

        }
}

#endif