Re: [Boost-users] member functions as slots with signals?

From: Victor A. Wagner, Jr. (vawjr_at_[hidden])
Date: 2003-09-30 16:11:19

First, thanks for the prompt reply.

I was wondering about mem_fn also
IMO updating the docs to reflect that would be quite useful.... I think I 
personal prefer mem_fn() for our application.

At Tuesday 2003-09-30 13:47, you wrote:
>On Tuesday 30 September 2003 04:12 pm, Victor A. Wagner, Jr. wrote:
> > I've been over the documentation several times and I keep getting the
> > feeling that I'm just missing something.
> > I'd like to have some member functions (methods) as slots for some signals
> > (a la QT).  I suspect that there is some form of bind that I could use, but
> > it's certainly not obvious to me.
>
>Yep, bind can do it:
>
>struct X {
>   int foo(float, char);
>};
>
>signal<int (X*, float, char)> sig;
>sig.connect(bind(&X::foo, _1, _2, _3));
>// or
>sig.connect(mem_fn(&X::foo));
>
>The _1 is the implicit object parameter ("this") that the member function
>pointer is invoked with.
>
>         Doug
>
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Victor A. Wagner Jr.      http://rudbek.com
The five most dangerous words in the English language:
               "There oughta be a law"