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pqxx-object/row_base.h

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00001 // database row base class                                       -*- C++ -*-
00002 // $Id: row_base.h,v 1.2 2004/01/07 14:29:39 roger Exp $
00003 //
00004 // Copyright (C) 2003  Roger Leigh <rleigh@debian.org>
00005 //
00006 //
00007 // This program is free software; you can redistribute it and/or modify
00008 // it under the terms of the GNU General Public License as published by
00009 // the Free Software Foundation; either version 2 of the License, or
00010 // (at your option) any later version.
00011 //
00012 // This program is distributed in the hope that it will be useful,
00013 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00014 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015 // GNU General Public License for more details.
00016 //
00017 // You should have received a copy of the GNU General Public License
00018 // along with this program; if not, write to the Free Software
00019 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00020 
00021 #ifndef PQXX_OBJECT_ROW_BASE_H
00022 #define PQXX_OBJECT_ROW_BASE_H
00023 
00024 #include <sigc++/object.h>
00025 #include <sigc++/signal.h>
00026 
00027 namespace pqxxobject
00028 {
00032   class row_base : public SigC::Object
00033   {
00034   public:
00035     enum state
00036       {
00037         STATE_UNINITIALISED,
00038         STATE_INITIALISED,
00039         STATE_INCONSISTENT
00040       };
00041 
00042     row_base();
00043 
00044     row_base(state status,
00045              bool modified=false);
00046 
00047     row_base(const row_base& rhs);
00048 
00049     virtual ~row_base();
00050 
00051 
00052     row_base& operator = (const row_base& rhs);
00053 
00054     state get_state() const;
00055 
00056     bool is_modified() const;
00057 
00058     void refresh();
00059     void insert();
00060     void update();
00061     void erase();
00062 
00063     SigC::Signal0<void>& signal_changed();
00064     SigC::Signal0<void>& signal_refreshed();
00065     SigC::Signal0<void>& signal_inserted();
00066     SigC::Signal0<void>& signal_updated();
00067     SigC::Signal0<void>& signal_erased();
00068 
00069   protected:
00070     state m_state;
00071     bool m_modified;
00072 
00073     virtual void refresh_impl();
00074     virtual void insert_impl();
00075     virtual void update_impl();
00076     virtual void erase_impl();
00077 
00078     SigC::Signal0<void> m_signal_changed;
00079     SigC::Signal0<void> m_signal_refreshed;
00080     SigC::Signal0<void> m_signal_inserted;
00081     SigC::Signal0<void> m_signal_updated;
00082     SigC::Signal0<void> m_signal_erased;
00083 
00084   }; // class row_base
00085 
00086 }; // namespace pqxxobject
00087 
00088 #endif // PQXX_OBJECT_ROW_BASE_H

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