/*
   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_XORRECTANGLE_H )
#define INCLUDED_XORRECTANGLE_H

#include <cairo.h>
#include <uilib/uilib.h>
#include "math/vector.h"

class rectangle_t {
public:
    rectangle_t()
            : x(0), y(0), w(0), h(0)
    {}

    rectangle_t(float _x, float _y, float _w, float _h)
            : x(_x), y(_y), w(_w), h(_h)
    {}

    float x;
    float y;
    float w;
    float h;
};

struct Coord2D {
    float x, y;

    Coord2D(float _x, float _y)
            : x(_x), y(_y)
    {
    }
};

inline Coord2D coord2d_device2screen(const Coord2D &coord, unsigned int width, unsigned int height)
{
    return Coord2D(((coord.x + 1.0f) * 0.5f) * width, ((coord.y + 1.0f) * 0.5f) * height);
}

inline rectangle_t rectangle_from_area(const float min[2], const float max[2], unsigned int width, unsigned int height)
{
    Coord2D botleft(coord2d_device2screen(Coord2D(min[0], min[1]), width, height));
    Coord2D topright(coord2d_device2screen(Coord2D(max[0], max[1]), width, height));
    return rectangle_t(botleft.x, botleft.y, topright.x - botleft.x, topright.y - botleft.y);
}

class XORRectangle {

    rectangle_t m_rectangle;

    ui::GLArea m_widget;
    cairo_t *cr;

    bool initialised() const;

    void lazy_init();

    void draw() const;

public:
    XORRectangle(ui::GLArea widget);

    ~XORRectangle();

    void set(rectangle_t rectangle);
};


#endif