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

class Button
{

private:

    boost::signal<void (std::string)> mySignal;
    std::string name;

public:


    Button(std::string _name):name(_name)
    {
    }

    void pressed()
    {
        mySignal(name);
    }

    void unregisterCallback(const boost::signal<void (std::string)>::slot_type& slot)
    {
        mySignal.disconnect(slot);
    }

    void registerCallback(const boost::signal<void (std::string)>::slot_type& slot)
    {
        mySignal.connect(slot);
    }

};



class Dummy
{

private:

    std::string name;


public:

    Button* button;

    Dummy(std::string _name):name(_name){
        button = new Button("my Button");
        button->registerCallback(boost::bind(&Dummy::sayHello, this , _1));
    }


    void sayHello(std::string param)
    {
        std::cout << "Hello: " << param << " (name: " << name << ")" << std::endl;

    }

    void unregister()
    {
        button->unregisterCallback(boost::bind(&Dummy::sayHello, this , _1));
    }

};



int main() {

    Dummy test("test");

    (test.button)->pressed();
    (test.button)->pressed();
    test.unregister();
    (test.button)->pressed();
    (test.button)->pressed();
}