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P_Buttons.h

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/***************************************************************************
 *cr                                                                       
 *cr            (C) Copyright 1995-2019 The Board of Trustees of the           
 *cr                        University of Illinois                       
 *cr                         All Rights Reserved                        
 *cr                                                                   
 ***************************************************************************/

/***************************************************************************
 * RCS INFORMATION:
 *
 *      $RCSfile: P_Buttons.h,v $
 *      $Author: johns $        $Locker:  $             $State: Exp $
 *      $Revision: 1.25 $       $Date: 2019/01/17 21:21:00 $
 *
 ***************************************************************************
 * DESCRIPTION:
 * This is Paul's new Tracker code -- pgrayson@ks.uiuc.edu
 *
 * A Buttons is a representation for a set of n boolean inputs.  This
 * fairly abstract class should be subclassed to make Buttons objects
 * that actually know how to get their buttons.  This is somewhat
 * parallel to the Tracker object, compare them!
 *
 ***************************************************************************/

#ifndef P_BUTTONS_H
#define P_BUTTONS_H

#define MAX_BUTTONS 100

#include "ResizeArray.h"
#include "P_SensorConfig.h"





class Buttons {
 protected: 
  ResizeArray<int> used; 
  int stat[MAX_BUTTONS]; 

  virtual int do_start(const SensorConfig *) { return 1; }

 public:
  Buttons() {}
  virtual ~Buttons() {}
  
  virtual const char *device_name() const = 0;
  virtual Buttons *clone() = 0;

  int start(const SensorConfig *);

  virtual void update() = 0;
  inline int state(int num) {
    if(num>used.num() || num<0) return 0;
    return stat[used[num]];
  }
};

#endif

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