livetrax/libs/canvas/canvas/arc.h

/*
    Copyright (C) 2013 Paul Davis

    This program 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.

    This program 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 this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#ifndef __CANVAS_ARC_H__
#define __CANVAS_ARC_H__

#include "canvas/visibility.h"
#include "canvas/item.h"
#include "canvas/outline.h"
#include "canvas/fill.h"

namespace ArdourCanvas {

class Canvas;

class LIBCANVAS_API Arc : public Item
{
public:
	Arc (Canvas*);
	Arc (Item*);

	void render (Rect const & area, Cairo::RefPtr<Cairo::Context>) const;
	void compute_bounding_box () const;

        void set_center (Duple const &);
	void set_radius (Coord);
	void set_arc (double degrees);
	void set_start (double degrees);

        Duple center() const {
		return _center;
	}
	Coord radius () const {
		return _radius;
	}
	double arc_degrees () const {
		return _arc_degrees;
	}
        double start_degrees () const {
		return _start_degrees;
	}

        bool covers (Duple const &) const;

private:
        Duple  _center;
        Coord  _radius;
        double _arc_degrees;
        double _start_degrees;
};

}

#endif