Attaching a signal handler to menus created by hand - Not using UI Manager or Menu Helper methods

[Jason Alan Smith <jsmith435 cox net>]

Hello, I have an application I'm writing trying to create the menus by
hand, not using the UIManager or the menuhelpers, mainly cause I want to
be able to do it first the "hard" way and then use the easy ways.

I've attached some of the code I'm having problems with below along with
the errors I get.

My Question is how do I attach a signal handler by hand to a menu
activate signal?  I've searched the archives and did a little searching
but could not find anything.  I've also checked the sample apps in the
gtkmm source but they all seem to use the "easy" methods.

A pitcher of virtual beer to anyone who can help!  Thanks much in
advance!

Jason


**********************************************************
Source Code Follows:
**********************************************************

Edm_Main_Menu::Edm_Main_Menu()
{
  	file_menu("File"),
  	file_new("New"),
	file_open("Open"),
	file_save("Save"),
	file_save_as("Save As"),
	file_close("Close"),
	file_exit("Exit")

	menu.append(file_new);
	menu.append(file_open);
	menu.append(file_save);
	menu.append(file_save_as);
	menu.append(file_close);
	menu.append(file_exit);

    	file_menu.set_submenu(menu);
    	append(file_menu);

	file_new.signal_activate().connect(*this,
sigc::mem_fun(&Edm_Main_Menu::OnFileNew));

    show_all_children();
}

gives:

Edm_Main_Menu.cxx: In constructor ‘Edm_Main_Menu::Edm_Main_Menu()’:
Edm_Main_Menu.cxx:32: error: no matching function for call to
‘Glib::SignalProxy0<void>::connect(Edm_Main_Menu&,
sigc::mem_functor0<void, Edm_Main_Menu>)’
/usr/include/glibmm-2.4/glibmm/signalproxy.h:145: note: candidates are:
sigc::connection Glib::SignalProxy0<R>::connect(const
sigc::slot<T_return, sigc::nil, sigc::nil, sigc::nil, sigc::nil,
sigc::nil, sigc::nil, sigc::nil>&, bool) [with R = void]

**********************************************************
also tried without the *this in the file_new.signal... line and got
this:
**********************************************************

/usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h: In member
function ‘typename sigc::adaptor_functor<T_functor>::result_type
sigc::adaptor_functor<T_functor>::operator()() const [with T_functor =
sigc::mem_functor0<void, Edm_Main_Menu>]’:
/usr/include/sigc++-2.0/sigc++/functors/slot.h:103:   instantiated from
‘static T_return sigc::internal::slot_call0<T_functor,
T_return>::call_it(sigc::internal::slot_rep*) [with T_functor =
sigc::mem_functor0<void, Edm_Main_Menu>, T_return = void]’
/usr/include/sigc++-2.0/sigc++/functors/slot.h:110:   instantiated from
‘static void* (* sigc::internal::slot_call0<T_functor,
T_return>::address())(void*) [with T_functor = sigc::mem_functor0<void,
Edm_Main_Menu>, T_return = void]’
/usr/include/sigc++-2.0/sigc++/functors/slot.h:454:   instantiated from
‘sigc::slot0<T_return>::slot0(const T_functor&) [with T_functor =
sigc::mem_functor0<void, Edm_Main_Menu>, T_return = void]’
/usr/include/sigc++-2.0/sigc++/functors/slot.h:1130:   instantiated from
‘sigc::slot<T_return, sigc::nil, sigc::nil, sigc::nil, sigc::nil,
sigc::nil, sigc::nil, sigc::nil>::slot(const T_functor&) [with T_functor
= sigc::mem_functor0<void, Edm_Main_Menu>, T_return = void]’
Edm_Main_Menu.cxx:32:   instantiated from here
/usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251: error: no
match for call to ‘(sigc::mem_functor0<void, Edm_Main_Menu>) ()’
/usr/include/sigc++-2.0/sigc++/functors/mem_fun.h:94: note: candidates
are: T_return sigc::mem_functor0<T_return, T_obj>::operator()(T_obj*)
const [with T_return = void, T_obj = Edm_Main_Menu]
/usr/include/sigc++-2.0/sigc++/functors/mem_fun.h:101: note:
T_return sigc::mem_functor0<T_return, T_obj>::operator()(T_obj&) const
[with T_return = void, T_obj = Edm_Main_Menu]
/usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251: error:
return-statement with a value, in function returning 'void'