surfaces/maschine2/canvas.h

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/*
 * Copyright (C) 2016 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 _ardour_maschine2_canvas_h_
#define _ardour_maschine2_canvas_h_
 
#include <cairomm/refptr.h>
#include <glibmm/threads.h>
 
#include "canvas/canvas.h"
 
namespace Cairo {
        class ImageSurface;
        class Context;
        class Region;
}
 
namespace ArdourSurface {
 
class M2Device;
class Maschine2;
 
/* A canvas which renders to the Push2 display */
 
class Maschine2Canvas : public ArdourCanvas::Canvas
{
  public:
        Maschine2Canvas (Maschine2&, M2Device*);
        ~Maschine2Canvas();
 
        void request_redraw ();
        void request_redraw (ArdourCanvas::Rect const &);
        void queue_resize ();
        bool vblank ();
 
        Cairo::RefPtr<Cairo::Context> image_context() { return context; }
 
        ArdourCanvas::Coord width() const { return _width; }
        ArdourCanvas::Coord height() const { return _height; }
 
        void request_size (ArdourCanvas::Duple);
        ArdourCanvas::Rect visible_area () const;
 
        /* API that does nothing since we have no input events */
        void ungrab () {}
        void grab (ArdourCanvas::Item*) {}
        void focus (ArdourCanvas::Item*) {}
        void unfocus (ArdourCanvas::Item*) {}
        void re_enter() {}
        void pick_current_item (int) {}
        void pick_current_item (ArdourCanvas::Duple const &, int) {}
        bool get_mouse_position (ArdourCanvas::Duple&) const { return false; }
 
        Glib::RefPtr<Pango::Context> get_pango_context ();
 
  private:
        int _width;
        int _height;
 
        Cairo::RefPtr<Cairo::Context> context;
        Cairo::RefPtr<Cairo::Region> expose_region;
        Glib::RefPtr<Pango::Context> pango_context;
 
        Maschine2& m2;
        PBD::ScopedConnection vblank_connections;
 
        bool expose ();
};
 
} /* namespace ArdourSurface */
 
#endif