signal-slot是一个非常方便的接口机制，在boost库中同样也实现了signal-slot，下面我体验下： 1

button.h头文件：

//button.h
#ifndef __EXAM_H__
#define __EXAM_H__

#include <boost/signal.hpp>
#include <boost/bind.hpp>


class Button
{
    typedef boost::signal<void (int x, int y)> OnClick;

public:
	Button(){};

	void init();

	void print(long x, long y);
	void notify(long x, long y);
	void show(long x, long y);


    void press(int x, int y) {
        onClick(x, y);
    }

private:
    OnClick onClick;
};

#endif //__EXAM_H__

button.cpp源文件：

//button.cpp
#include <iostream>
#include "button.h"


void Button::init()
{
	onClick.connect(boost::bind(&Button::print, this, _1, _2));
	onClick.connect(boost::bind(&Button::notify, this, _1, _2));
	onClick.connect(boost::bind(&Button::show, this, _1, _2));
}



void Button::print(long x, long y)
{
    std::cout<<"Print Clicked @(" << x << "," << y <<")\n";
}

void Button::notify(long x, long y)
{
	std::cout<<"Notify Clicked @(" << x << "," << y <<")\n";
}

void Button::show(long x, long y)
{
	std::cout<<"Show Clicked @(" << x << "," << y <<")\n";
}

main.cpp源文件

//main.cpp
#include <iostream>
#include <boost/bind.hpp>
//#include <boost/function>
#include "button.h"

void button_click_test()
{
    Button button;
	button.init();

    std::cout<<"===== button onclick test\n";

    button.press(200,300);
    button.press(20,30);
    button.press(19,3);
}



int main(int argc, char *argv[])
{
    button_click_test();

    return 0;
}

Makefile文件：

#Makefile
OBJS = button.o main.o
CC = g++
LIBS = -l boost_signals
CFLAGS = -Wall -O -g

myprog : $(OBJS)
	$(CC) $^ -o $@ $(LIBS)

main.o : main.cpp
	$(CC) $(CFLAGS) -c $< -o $@ $(LIBS)

button.o : button.cpp button.h
	$(CC) $(CFLAGS) -c $< -o $@ $(LIBS)

.PYONY: clean

clean:
	rm -rf $(OBJS)
	rm -rf myprog

编译并执行：

# make
g++ -Wall -O -g -c button.cpp -o button.o -l boost_signals
g++ button.o main.o -o myprog -l boost_signals
# ./myprog
===== button onclick test
Print Clicked @(200,300)
Notify Clicked @(200,300)
Show Clicked @(200,300)
Print Clicked @(20,30)
Notify Clicked @(20,30)
Show Clicked @(20,30)
Print Clicked @(19,3)
Notify Clicked @(19,3)
Show Clicked @(19,3)