#include <iostream>
#include <functional>
 
class ClassXY
{
	using MyFnc = std::function<void()>;
    MyFnc function;
 
public:
    ClassXY(MyFnc f)
        : function(std::move(f))
    {}
 
    void call()
    {
        function();  // Calls the function
    }
};
 
class Handler
{
public:
    void HandleButtonEvent()
    {
        std::cout << "Handler::HandleButtonEvent2\n";
    }
};
 
int main()
{
    // Handler* handler = new Handler;
    auto handler = std::make_unique<Handler>()
 
    ClassXY xy(std::bind(&Handler::HandleButtonEvent, handler));
 
    xy.call();
}
 

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