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controllable.h

/*
    Copyright (C) 1998-99 Paul Barton-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.

    $Id: controllable.h,v 1.7 2005/03/31 20:21:31 pauld Exp $
*/

#ifndef __qm_midicontrollable_h__
#define __qm_midicontrollable_h__

#include <string>

#include <sigc++/signal_system.h>
#include <midi++/types.h>

namespace MIDI {

class Channel;
class Port;
class Parser;

class Controllable : public SigC::Object
{
  public:
      Controllable (Port *, bool bistate = false);
      virtual ~Controllable ();

      void midi_rebind (Port *, channel_t channel=-1);
      void midi_forget ();
      void learn_about_external_control ();
      void stop_learning ();
      void drop_external_control ();

      virtual void set_value (float) = 0;

      SigC::Signal0<void> learning_started;
      SigC::Signal0<void> learning_stopped;

      bool get_control_info (channel_t&, eventType&, byte&);
      void set_control_type (channel_t, eventType, byte);

      bool get_midi_feedback () { return feedback; }
      void set_midi_feedback (bool val) { feedback = val; }

      Port * get_port() { return port; }
      
      std::string control_description() const { return _control_description; }

      void send_midi_feedback (float);
      
  private:
      bool             bistate;
      int              midi_msg_id;      /* controller ID or note number */
      SigC::Connection midi_sense_connection[2];
      SigC::Connection midi_learn_connection;
      size_t           connections;
      Port*            port;
      eventType        control_type;
      byte             control_additional;
      channel_t        control_channel;
      std::string     _control_description;
      bool             feedback;
      
      void midi_receiver (Parser &p, byte *, size_t);
      void midi_sense_note (Parser &, EventTwoBytes *, bool is_on);
      void midi_sense_note_on (Parser &p, EventTwoBytes *tb);
      void midi_sense_note_off (Parser &p, EventTwoBytes *tb);
      void midi_sense_controller (Parser &, EventTwoBytes *);
      void midi_sense_program_change (Parser &, byte);
      void midi_sense_pitchbend (Parser &, pitchbend_t);

      void bind_midi (channel_t, eventType, byte);
};

}; /* namespace MIDI */

#endif // __qm_midicontrollable_h__


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