//----------------------------------------------------------------------------
//  EgalTech 2014-2014
//----------------------------------------------------------------------------
// File : SelManager.h           Data : 19.05.14          Versione : 1.5e7
// Contenuto : Dichiarazione e implementazione della classe SelManager.
//
//
//
// Modifiche : 19.03.14 DS Creazione modulo.
//             19.05.14 DS La AddObj non controlla eventuale precedente presenza 
//                         oggetto in lista, perchè già si fa tramite flag di GdbObj.
//
//----------------------------------------------------------------------------

#pragma once

#include <list>

class GdbObj ;

//----------------------------------------------------------------------------
typedef std::list<GdbObj*> PGDBO_LIST ;

//----------------------------------------------------------------------------
class SelManager
{
   public :
      SelManager( void)
              { m_Iter = m_SelList.end() ; }
      void Clear( void)
              { m_SelList.clear() ;
                m_Iter = m_SelList.end() ; }
      int  GetSize( void) const
              { return int ( m_SelList.size()) ; }
      bool AddObj( GdbObj* pGObj)
              { if ( pGObj == nullptr)
                   return false ;
                try { m_SelList.push_back( pGObj) ; }
                catch (...) { return false ;}
                return true ; }
      bool RemoveObj( GdbObj* pGObj)
              { PGDBO_LIST::iterator Iter ;
                for ( Iter = m_SelList.begin() ; Iter != m_SelList.end() ; ++ Iter) {
                   if ( *Iter == pGObj) {
                      if ( Iter == m_Iter)
                         m_Iter = m_SelList.end() ;
                      m_SelList.erase( Iter) ;
                      return true ;
                   }
                }
                return true ; }
      GdbObj* GetFirstObj( void) const
              { m_Iter = m_SelList.begin() ;
                if ( m_Iter == m_SelList.end())
                   return nullptr ;
                return (*m_Iter) ; }
      GdbObj* GetNextObj( void) const
              { if ( m_Iter == m_SelList.end())
                   return nullptr ;
                ++ m_Iter ;
                if ( m_Iter == m_SelList.end())
                   return nullptr ;
                return (*m_Iter) ; }
      GdbObj* GetLastObj( void) const
              { m_Iter = m_SelList.end() ;
                if ( m_Iter == m_SelList.begin())
                   return nullptr ;
                -- m_Iter ;
                if ( m_Iter == m_SelList.end())
                   return nullptr ;
                return (*m_Iter) ; }
      GdbObj* GetPrevObj( void) const
              { if ( m_Iter == m_SelList.begin())
                   return nullptr ;
                -- m_Iter ;
                if ( m_Iter == m_SelList.end())
                   return nullptr ;
                return (*m_Iter) ; }

   private :
      PGDBO_LIST           m_SelList ;
      mutable PGDBO_LIST::const_iterator m_Iter ;
} ;