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dev.H

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#ifndef GLUE_DEV_H
#define GLUE_DEV_H

#include "std/strings.H"
#include "std/list.H"
#include "std/typedobj.H"
#include "event/event.H"


//
//  DEVice - base class for chainable, observable device sources
//      
//  DEVice's are event sources that generate callbacks to observers
//  when events are generated. 
//
class DllImpExp DEVice: public EVENTsource, public TYPEDOBJ {
  protected:
   ARRAY<EVENThandler *>  _hdlrs;   // Pointer to event handler for this device
  static ARRAY<DEVice *> *_devices;
   str_ptr                _dev_name;

  public:
               DEVice(Cstr_ptr &dev_name, Cstr_ptr &evt_name);
   virtual    ~DEVice()                         { }

      void     add_handler(EVENThandler *h)     { _hdlrs += h; }
      void     rem_handler(EVENThandler *h)     { _hdlrs -= h; }
      void     distrib    (cEVENTptr &e)  const { EVENTmgr::distrib(e);
                                                  for (int i=0;i<_hdlrs.num();i++)
                                                   _hdlrs[i]->handle_event(e); }
 
      str_ptr dev_name()                  const { return _dev_name; }
      void    debug(ostream &os)          const { os << "dev = "<< _dev_name << " "; 
                                                  EVENTsource::debug(os); }

  static void    print_available_events(Cstr_ptr &evtype);
  static DEVice *lookup(EVENTsource s);
  static const ARRAY<DEVice *> &devices() { return *_devices; }

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

#endif

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