CEGUIProperty.h

/***********************************************************************
        filename:       CEGUIProperty.h
        created:        21/2/2004
        author:         Paul D Turner
        
        purpose:        Defines the Property class which forms part of a
                                PropertySet
*************************************************************************/
/***************************************************************************
 *   Copyright (C) 2004 - 2006 Paul D Turner & The CEGUI Development Team
 *
 *   Permission is hereby granted, free of charge, to any person obtaining
 *   a copy of this software and associated documentation files (the
 *   "Software"), to deal in the Software without restriction, including
 *   without limitation the rights to use, copy, modify, merge, publish,
 *   distribute, sublicense, and/or sell copies of the Software, and to
 *   permit persons to whom the Software is furnished to do so, subject to
 *   the following conditions:
 *
 *   The above copyright notice and this permission notice shall be
 *   included in all copies or substantial portions of the Software.
 *
 *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 *   IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 *   OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 *   ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 *   OTHER DEALINGS IN THE SOFTWARE.
 ***************************************************************************/
#ifndef _CEGUIProperty_h_
#define _CEGUIProperty_h_

#include "CEGUIBase.h"
#include "CEGUIString.h"
#include "CEGUIXMLSerializer.h" 

// Start of CEGUI namespace section
namespace CEGUI
{

class CEGUIEXPORT PropertyReceiver
{
public:
        PropertyReceiver() {}
        virtual ~PropertyReceiver() {}
};


class CEGUIEXPORT Property
{
public:
        Property(const String& name, const String& help, const String& defaultValue = "", bool writesXML = true) :
          d_name(name),
          d_help(help),
          d_default(defaultValue),
          d_writeXML(writesXML)
        {
        }


        virtual ~Property(void) {}


        const String& getHelp(void) const               {return d_help;}


        const String& getName(void) const               {return d_name;}


        virtual String  get(const PropertyReceiver* receiver) const = 0;


        virtual void    set(PropertyReceiver* receiver, const String& value) = 0;


        virtual bool    isDefault(const PropertyReceiver* receiver) const;


        virtual String  getDefault(const PropertyReceiver* receiver) const;

    virtual void writeXMLToStream(const PropertyReceiver* receiver, XMLSerializer& xml_stream) const;

    virtual void initialisePropertyReceiver(PropertyReceiver* receiver) const {}

protected:
        String  d_name;         
        String  d_help;         
        String  d_default;      
        bool    d_writeXML; 
};

} // End of  CEGUI namespace section

#endif  // end of guard _CEGUIProperty_h_