ui_knob.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_knob_h_
#define _ardour_maschine2_knob_h_
 
#include <memory>
 
#include <sigc++/trackable.h>
 
#include <cairomm/refptr.h>
 
#include "pbd/signals.h"
 
#include "canvas/container.h"
 
namespace ArdourCanvas {
        class Text;
}
 
namespace ARDOUR {
        class AutomationControl;
}
 
namespace Cairo {
        class Context;
        class Region;
}
 
namespace ArdourSurface {
 
class Maschine2;
class M2EncoderInterface;
 
class Maschine2Knob : public sigc::trackable, public ArdourCanvas::Container
{
        public:
                Maschine2Knob (PBD::EventLoop*, ArdourCanvas::Item*);
                virtual ~Maschine2Knob ();
 
                void set_controllable (std::shared_ptr<ARDOUR::AutomationControl>);
                void set_control (M2EncoderInterface*);
                std::shared_ptr<ARDOUR::AutomationControl> controllable() const { return _controllable; }
 
                void render (ArdourCanvas::Rect const &, Cairo::RefPtr<Cairo::Context>) const;
                void compute_bounding_box() const;
 
        protected:
                void controllable_changed ();
                void encoder_changed (int);
 
                PBD::ScopedConnection watch_connection;
                PBD::ScopedConnection encoder_connection;
 
                std::shared_ptr<ARDOUR::AutomationControl> _controllable;
                M2EncoderInterface* _ctrl;
 
        private:
                PBD::EventLoop* _eventloop;
 
                float  _radius;
                float  _val; // current value [0..1]
                float  _normal; // default value, arc
 
                ArdourCanvas::Text* text;
};
 
} // namespace
 
#endif