Re: [gtkmm] syntax for MenuElem( .....,slot( static member function ) )

[Roman Ancerowicz <rancerow poczta onet pl>]

On Thu, 27 Jun 2002 16:28:05 -0600
Stephen Tashiro <tashiro zianet com> wrote:

> >>In my opinion;
> >>Control_class my_cc;
> 
> >>list.push_back( MenuElem("Start" ,slot(my_cc,  &Control_class::playback) ) );
> 
> That works if my_cc is a menu but I can't get it to work if it is a non-menu class.

I'm forget. If you want to make a class when you would like put your callbacks
you must derive it from SigC::Object. For me it works.

> 
> Also if use a global variable:
> 
> Control_class *cc_ptr;
> 
> main()
> {
>    *cc_ptr = new Control_class;
> 
>     ...
> }
> extern Control_class *cc_ptr;
> my_menu_class::my_menu_class()
> {
>    
> 
> ...list.push_back( MenuElem("Start",slot(*cc_ptr,&(cc_ptr->playback) )));
> }
> 
> I get a message that says something to the effect that I can't make a pointer out of the address of a member function of a "bound variable".
> 
> However I can make a "wrapper" function in my_menu_class called playCb()  which is just:
> 
> extern Control_class *cc_ptr;
> int my_menu_class::playCb
> {
>     cc_ptr->playback();
> }
> 
> and use
>     
>       list.push_back( MenuElem("Start", slot( *this, &playback) ));
> 
> and get things compiled. (Don't know if this runs correctly yet.)
> 
> 
> I am mystified by what can go into slot() and what cannot.  Of course, I've never studied Gtk.
> 
> 
> 


-- 
Roman Ancerowicz rancerow poczta onet pl
http://www.opensourcepl.org
Registered Linux user number #205058.My machine has registration number #93996.