Es++ Class: Callback

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Source code

/******************************************************************************
 *
 * Copyright (c) 2015  TOSHIYUKI ARAI. ALL RIGHTS RESERVED. 
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
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 *
 *  Callback.h
 *
 *****************************************************************************/

//2015/06/01

#pragma once

#include <es++/Object.h>

namespace Es {

template <class CLASS,     //A pointer to a C++ class 
          typename METHOD, //A pointer to a method of CLASS 
          typename PARAM>  //A parameter to a callback 

class Callback :public Object {
private:
  CLASS   object;  //A pointer to an instance of CLASS
  METHOD  method;  //A pointer to a a method of CLASS 

public:
  Callback()
  :object(NULL),
  method(NULL)
  {
  }

public:
  void set(CLASS object, METHOD method)
  {
    if (object && method) {
      this -> object = object;
      this -> method = method;
    } else {
      throw Es::IException("Invalid argument");
    }
  }

  void call(PARAM param)
  {
    if (object && method) {
      (object->*method)(param);
    }
  }
};

}


Last modified: 27 July 2017

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