TAO/examples/Event_Comm/Supplier_Input_Handler.h

   1 /* -*- C++ -*- */
   2
   3 //=============================================================================
   4 /**
   5  *  @file    Supplier_Input_Handler.h
   6  *
   7  *  Handle input from the keyboard.
   8  *
   9  *  @author Douglas C. Schmidt (d.schmidt@vanderbilt.edu) and Pradeep Gore (pradeep@cs.wustl.edu)
  10  */
  11 //=============================================================================
  12
  13
  14 #ifndef SUPPLIER_INPUT_HANDLER_H
  15 #define SUPPLIER_INPUT_HANDLER_H
  16
  17 #include "ace/Service_Config.h"
  18
  19 #if !defined (ACE_LACKS_PRAGMA_ONCE)
  20 # pragma once
  21 #endif /* ACE_LACKS_PRAGMA_ONCE */
  22
  23 // Forward declaration.
  24 class Notifier_Handler;
  25
  26 /**
  27  * @class Supplier_Input_Handler
  28  *
  29  * @brief Handles input events generated from a keyboard.
  30  *
  31  * The events are currently framed and forwarded to all Consumers.
  32  * In the future, we will need to be more selective and only send
  33  * to those Consumers whose filtering criteria matches!
  34  */
  35 class Supplier_Input_Handler : public ACE_Event_Handler
  36 {
  37 public:
  38   /// Constructor.
  39   Supplier_Input_Handler ();
  40
  41   /// Destructor.
  42   ~Supplier_Input_Handler ();
  43
  44   /// Initialization.
  45   int initialize (Notifier_Handler *);
  46
  47   /// Frame input events and notify <Consumers>.
  48   virtual int handle_input (ACE_HANDLE);
  49
  50   /// Close down the handler.
  51   int close ();
  52
  53 protected:
  54   /// Pointer to a <Notifier_Handler> that's used to inform Consumers
  55   /// that events of interest have occurred.
  56     Notifier_Handler *notifier_;
  57 };
  58
  59 #endif /* SUPPLIER_INPUT_HANDLER_H */