Connecting signals syntax.

[German Diago Gomez <al059365 alumail uji es>]

 Hello. I'm using gtkmm to build an application. Great work! A good GUI
toolkit.
 But I'd like to give some feedback of what, from my perspective, would be some
little improvements to the API.
 When I want to connect some signal to a slot, I think the syntax should be
clearer. Why have I to do:

   button.signal_clicked().connect(sigc::mem_fun(this, &MyClass::myFunc));
   button.signal_clicked().connect(sigc::ptr_fun(&myFunc));

When I could do:

   button.signal_clicked().connect(this, &MyClass::myFunc);
   button.signal_clicked().connect(&myFunc);

But the thing gets worse when you combine that with bind:
 
   button.signal_clicked().connect(boost::bind(sigc::mem_fun(this,
&MyClass::myFunc), data));

This is difficult to write. I always have to think carefully what I'm writing.
Otherwise I make mistakes.

  I think that sigc should be replaced by boost::function which is more powerful
and you haven't to deal explicitly with mem_fun and ptr_fun because it has a
better type deduction system.
 
  And I think that instead of using bind, you could overload connect to receive
additional parameters until an arbitrary number. This would make the syntax
like this:

  button.signal_clicked().connect(this, &MyClass::myFunc, data1, data2);

 You could do this for an arbitrary number of arguments, say, 10 arguments for
example. I think that syntax matters because you have to deal with connections
in code since the signaling system is type-safe and you can't do it from glade
like in python or C.

 Don't get me wrong, I think gtkmm is a good toolkit, but I think that doing
what I'm suggesting would be an improvement in API usability.

What do you think?