scroll_group.h

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/*
 * Copyright (C) 2014 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2015 David Robillard <d@drobilla.net>
 *
 * 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_SCROLL_GROUP_H__
#define __CANVAS_SCROLL_GROUP_H__
 
#include "canvas/container.h"
 
namespace ArdourCanvas {
 
class LIBCANVAS_API ScrollGroup : public Container
{
  public:
        enum ScrollSensitivity {
                ScrollsVertically = 0x1,
                ScrollsHorizontally = 0x2
        };
 
        ScrollGroup (Canvas*, ScrollSensitivity);
        ScrollGroup (Item*, ScrollSensitivity);
 
        void scroll_to (Duple const& d);
        Duple scroll_offset() const { return _scroll_offset; }
 
        bool covers_canvas (Duple const& d) const;
        bool covers_window (Duple const& d) const;
 
        void render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const;
 
        ScrollSensitivity sensitivity() const { return _scroll_sensitivity; }
 
  private:
        ScrollSensitivity _scroll_sensitivity;
        Duple             _scroll_offset;
};
 
}
 
#endif