C++ 委托 fastdelegate使用，实现类函数回调绑定

搜索下载文件： fastdelegate.h

下载地址：
http://code.google.com/p/code-adintr-com/source/browse/trunk/mylib/aslib/utility/FastDelegate.h?r=4

#include <stdio.h>
#include "fastdelegate.h"

///////////////////////////////
//被委托绑定的类成员函数
class Calculator
{
public:
	int Add(int nA, int nB)
	{
		return nA + nB;
	}

	int Sub(int nA, int nB)
	{
		return nA - nB;
	}

	int Multi(int nA, int nB)
	{
		return nA  * nB;
	}
};
/////////////////////////////////////////////////////////////////
//定义函数指针
typedef fastdelegate::FastDelegate2<int, int, int> AddFunc;
typedef fastdelegate::FastDelegate2<int, int, int> SubFunc;
typedef fastdelegate::FastDelegate2<int, int, int> MultiFunc;

//实现绑定到处理类
class CalcHander
{
public:

	template <class X, class Y, class Param1, class Param2, class RetType>
	void bind_add(Y* x, RetType (X::*func)(Param1 p1, Param2 p2))
	{
		pAddFunc = fastdelegate::MakeDelegate(x, func);
	}

	template <class X, class Y, class Param1, class Param2, class RetType>
	void bind_sub(Y* x, RetType (X::*func)(Param1 p1, Param2 p2))
	{
		pSubFunc = fastdelegate::MakeDelegate(x, func);
	}

	template <class X, class Y, class Param1, class Param2, class RetType>
	void bind_Multi(Y* x, RetType (X::*func)(Param1 p1, Param2 p2))
	{
		pMultiFunc = fastdelegate::MakeDelegate(x, func);
	}

public:

	void Init(Calculator *pCalculator)
	{
		bind_add(pCalculator, &Calculator::Add);
		bind_sub(pCalculator, &Calculator::Sub);
		bind_Multi(pCalculator, &Calculator::Multi);
	}


	void ExecuteAdd(int nA, int nB)
	{
		int nSum = pAddFunc(nA, nB);
		printf("Sum=%d\n", nSum);
	}

	void ExecuteSub(int nA, int nB)
	{
		int nSub = pSubFunc(nA, nB);
		printf("Sub=%d\n", nSub);
	}

	void ExecuteMulti(int nA, int nB)
	{
		int nMulti = pMultiFunc(nA, nB);
		printf("Multi=%d\n", nMulti);
	}
	
private:
	AddFunc		pAddFunc;
	SubFunc		pSubFunc;
	MultiFunc	pMultiFunc;
};


int main(int argc, char* argv[])
{
	Calculator calculator;					//被绑定对象声明
	CalcHander calcHander;					//主动绑定的对象声明
	calcHander.Init(&calculator);			//函数绑定
	//执行函数，调用绑定函数
	calcHander.ExecuteAdd(200, 100);		//300	相当于调用  calculator.Add(200, 100);
	calcHander.ExecuteSub(300, 100);		//200	相当于调用  calculator.Sub(300, 100);
	calcHander.ExecuteMulti(50, 20);		//1000	相当于调用  calculator.Multi(50, 20);

	return 0;
}