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button_serial.H

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#ifndef _buttons_serial_H_
#define _buttons_serial_H_

#include "dev/buttons.H"
#ifdef NO_POLL
#include "tty/tty.H"
#else
#include "dev/polled.H"
#endif

//
//   EVENTbtn_serial - a serial button transition event
//
//
MAKE_PTR_SUBC(EVENTbtn_serial, EVENT);
class DllImpExp EVENTbtn_serial : public EVENT {

  protected:
    bool   _trans;

    /* ----------- EVENT methods --------------- */
    virtual bool compare(cEVENTptr &e)   const { EVENTbtn_serial *b = 
                                                    (EVENTbtn_serial *)&*e;
                                                 return b->_trans == _trans; }
    virtual void debug_data(ostream &o)  const { o << " " <<
                                                 (_trans ? "down":"up"); }

  public:

          EVENTbtn_serial(Cstr_ptr &n, bool t=true) : EVENT(new EVENTsource(n)),
                                                                  _trans(t) { }
          EVENTbtn_serial(EVENTsource *s, bool t=true): EVENT(s), _trans(t) { }

    bool  transition()                    const { return _trans; }


    /* ----------- TYPEDOBJ methods --------------- */
    DEFINE_DERIVED_TYPE(EVENTbtn_serial, EVENT, cEVENTptr);
   static EVENTbtn_serialptr cast(cEVENTptr &e) { return EVENTbtn_serial::isa(e)
                                                 ? (EVENTbtn_serial *)&*e : 0; }
};

//
// A serial set of buttons
//
class DEVbutton_serial : public DEVice, 
#ifdef NO_POLL
             public TTYfd {
#else
             public DEVpolled {
#endif

 protected:
   int         _fd;
   bool        _state;


 public:
            DEVbutton_serial(Cstr_ptr &name);
   virtual ~DEVbutton_serial();
#ifdef NO_POLL
   /* ------------- TTYfd methods --------------- */
   void     sample();
   bool     activate();
   bool     deactivate();
#else
   /* ------------- DEVpolled methods --------------- */
   void     do_poll();
#endif

    /* ----------- TYPEDOBJ methods --------------- */
    DEFINE_DERIVED_TYPE(DEVbutton_serial, DEVice, const DEVice *);
};

#endif

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