line_set.h

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/*
 * Copyright (C) 2012 Carl Hetherington <carl@carlh.net>
 * Copyright (C) 2013-2014 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2015-2017 Robin Gareus <robin@gareus.org>
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
#ifndef __CANVAS_LINESET_H__
#define __CANVAS_LINESET_H__
 
#include <vector>
 
#include "canvas/item.h"
#include "canvas/visibility.h"
 
namespace ArdourCanvas {
 
class LIBCANVAS_API LineSet : public Item
{
public:
        enum Orientation {
                Vertical,
                Horizontal
        };
 
        LineSet (Canvas*, Orientation o = Vertical);
        LineSet (Item*, Orientation o = Vertical);
 
        void compute_bounding_box () const;
        void render (Rect const & area, Cairo::RefPtr<Cairo::Context>) const;
 
        bool covers (Duple const &) const;
 
        void set_extent (Distance);
        Distance extent() const { return _extent; }
 
        void begin_add ();
        void end_add ();
 
        struct ResetRAII {
                ResetRAII (LineSet& l) : lines (l) { lines.clear(); lines.begin_add(); }
                ~ResetRAII () { lines.end_add (); }
                LineSet& lines;
        };
 
        void add_coord (Coord, Distance, Gtkmm2ext::Color);
        void clear ();
 
        struct Line {
                Line (Coord p, Distance width_, Gtkmm2ext::Color color_) : pos (p), width (width_), color (color_) {}
 
                Coord pos;
                Distance width;
                Gtkmm2ext::Color color;
        };
 
private:
        std::vector<Line> _lines;
        Distance          _extent;
        Orientation       _orientation;
};
 
}
 
#endif /* __CANVAS_LINESET_H__ */