Re: [Boost-users] Replacing C functions with boost::function for callback functions in OpenGL

1 Jul 2006

      On Fri, 2006-06-30 at 14:40 -0400, Douglas Gregor wrote:
...
On Jun 30, 2006, at 12:28 PM, Stephen Torri wrote:
...
boost::function<void()> disp_func = boost::bind  
( &MyMain::display, &m_ref );
        	glutDisplayFunc ( disp_func );
Unfortunately, disp_func needs to be a function pointer. I wrote up a  
short article on the Wiki about using boost::function with C  
libraries. It may help you solve this problem:
http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl? 
Generalizing_C-Style_Callbacks
Doug
Given your example I would need to create a class something like the
following:

        class A {
        private:
        	typedef boost::function<void()> generic_opegnl_callback;

        public:
        	void init()
        	{
        		m_display_callback = boost::bind ( &display_impl, this );
        	}

        	void display_impl (void)
        	{
        		... display code ...
        	}

        	void display (void)
        	{
        		m_display_callback();
        	}

        private:
        	generic_opengl_callback m_display_callback;
        };

Is this right?

Stephen