colour.h

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/*
 Copyright (C) 2001-2006, William Joseph.
 All Rights Reserved.

 This file is part of GtkRadiant.

 GtkRadiant is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.

 GtkRadiant 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 General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with GtkRadiant; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#if !defined(INCLUDED_COLOUR_H)
#define INCLUDED_COLOUR_H

#include "ientity.h"
#include "irender.h"

#include "eclasslib.h"
#include "generic/callback.h"
#include "stringio.h"

inline void default_colour (Vector3& colour)
{
    colour = Vector3(1, 1, 1);
}
inline void read_colour (Vector3& colour, const char* value)
{
    if (!string_parse_vector3(value, colour)) {
        default_colour(colour);
    }
}
inline void write_colour (const Vector3& colour, Entity* entity)
{
    char value[64];

    sprintf(value, "%f %f %f", colour[0], colour[1], colour[2]);
    entity->setKeyValue("_color", value);
}

class Colour
{
        Callback m_colourChanged;
        Shader* m_state;

        void capture_state ()
        {
            m_state = colour_capture_state_fill(m_colour);
        }
        void release_state ()
        {
            colour_release_state_fill(m_colour);
        }

    public:
        Vector3 m_colour;

        Colour (const Callback& colourChanged) :
            m_colourChanged(colourChanged)
        {
            default_colour(m_colour);
            capture_state();
        }
        ~Colour ()
        {
            release_state();
        }

        void colourChanged (const std::string& value)
        {
            release_state();
            read_colour(m_colour, value.c_str());
            capture_state();

            m_colourChanged();
        }
        typedef MemberCaller1<Colour, const std::string&, &Colour::colourChanged> ColourChangedCaller;

        void write (Entity* entity) const
        {
            write_colour(m_colour, entity);
        }

        Shader* state () const
        {
            return m_state;
        }
};

#endif