Have you declared and defined your somehandler() member function as
bool somehandler(GdkEventKey* event) ?
Marko
On Sun, Apr 5, 2009 at 6:04 AM, Andreas Bauer <baue...@rsise.anu.edu.au> wrote:
> Dear all,
>
> I have a very simple to describe problem with gtkmm 2.4. I have a
> small window using a Gtk::Entry:
>
> class NewWorldWin : public Gtk::Window
> {
> ...
> Gtk::Entry name_entry;
> };
>
> And I am trying to be notified of users typing in that entry, hence in
> the implementation I have added:
>
> NewWorldWin::NewWorldWin(void)
> {
> ...
>
> name_entry.
> signal_key_press_event().
> connect(sigc::mem_fun(*this, &NewWorldWin::some_handler));
> }
>
> However, I cannot get it past the compiler. Here's the error I am
> getting, which, unfortunately, does not point at my code but at the
> internals of libsigc++. I am a bit lost, how to interpret it.
>
> /usr/include/sigc++-2.0/sigc++/functors/slot.h: In static member function
> `static T_return sigc::internal::slot_call1<T_functor, T_return,
> T_arg1>::call_it(sigc::internal::slot_rep*, typename
> sigc::type_trait<T_arg3>::take) [with T_functor =
> sigc::bound_mem_functor0<void, NewWorldWin>, T_return = bool, T_arg1 =
> GdkEventKey*]':
> /usr/include/sigc++-2.0/sigc++/functors/slot.h:144: instantiated from
> `static void* (* sigc::internal::slot_call1<T_functor, T_return,
> T_arg1>::address())(void*) [with T_functor = sigc::bound_mem_functor0<void,
> NewWorldWin>, T_return = bool, T_arg1 = GdkEventKey*]'
> /usr/include/sigc++-2.0/sigc++/functors/slot.h:529: instantiated from
> `sigc::slot1<T_return, T_arg1>::slot1(const T_functor&) [with T_functor =
> sigc::bound_mem_functor0<void, NewWorldWin>, T_return = bool, T_arg1 =
> GdkEventKey*]'
> /usr/include/sigc++-2.0/sigc++/functors/slot.h:1157: instantiated from
> `sigc::slot<T_return, T_arg1, sigc::nil, sigc::nil, sigc::nil, sigc::nil,
> sigc::nil, sigc::nil>::slot(const T_functor&) [with T_functor =
> sigc::bound_mem_functor0<void, NewWorldWin>, T_return = bool, T_arg1 =
> GdkEventKey*]'
> newworldwin.cc:58: instantiated from here
> /usr/include/sigc++-2.0/sigc++/functors/slot.h:137: error: void value not
> ignored as it ought to be
> /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h: In member function
> `typename sigc::adaptor_functor<T_functor>::deduce_result_type<T_arg1, void,
> void, void, void, void, void>::type
> sigc::adaptor_functor<T_functor>::operator()(T_arg1) const [with T_arg1 =
> GdkEventKey* const&, T_functor = sigc::bound_mem_functor0<void,
> NewWorldWin>]':
> /usr/include/sigc++-2.0/sigc++/functors/slot.h:137: instantiated from
> `static T_return sigc::internal::slot_call1<T_functor, T_return,
> T_arg1>::call_it(sigc::internal::slot_rep*, typename
> sigc::type_trait<T_arg3>::take) [with T_functor =
> sigc::bound_mem_functor0<void, NewWorldWin>, T_return = bool, T_arg1 =
> GdkEventKey*]'
> /usr/include/sigc++-2.0/sigc++/functors/slot.h:144: instantiated from
> `static void* (* sigc::internal::slot_call1<T_functor, T_return,
> T_arg1>::address())(void*) [with T_functor = sigc::bound_mem_functor0<void,
> NewWorldWin>, T_return = bool, T_arg1 = GdkEventKey*]'
> /usr/include/sigc++-2.0/sigc++/functors/slot.h:529: instantiated from
> `sigc::slot1<T_return, T_arg1>::slot1(const T_functor&) [with T_functor =
> sigc::bound_mem_functor0<void, NewWorldWin>, T_return = bool, T_arg1 =
> GdkEventKey*]'
> /usr/include/sigc++-2.0/sigc++/functors/slot.h:1157: instantiated from
> `sigc::slot<T_return, T_arg1, sigc::nil, sigc::nil, sigc::nil, sigc::nil,
> sigc::nil, sigc::nil>::slot(const T_functor&) [with T_functor =
> sigc::bound_mem_functor0<void, NewWorldWin>, T_return = bool, T_arg1 =
> GdkEventKey*]'
> newworldwin.cc:58: instantiated from here
> /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:84: error: no match
> for call to `(sigc::bound_mem_functor0<void, NewWorldWin>) (GdkEventKey*
> const&)'
> /usr/include/sigc++-2.0/sigc++/functors/mem_fun.h:1786: note: candidates are:
> T_return sigc::bound_mem_functor0<T_return, T_obj>::operator()() const [with
> T_return = void, T_obj = NewWorldWin]
> /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:84: error:
> return-statement with a value, in function returning 'void'
> make: *** [all] Error 1
>
> Any pointers on what I am doing wrong? I feel, I am missing something
> obvious, but not obvious enough such that the compiler would complain
> about MY code.
>
> By the way, I have also tried to inherit from Gtk::Entry and override
> on_key_press_event, which works fine but then I cannot access the data
> of my window, and my design becomes generally 'ugly'. So I'd like to
> somehow have access to that signal inside the window rather than write
> my own Entry-derivate, and split off a dedicated data class.
>
> Many thanks for any help in advance,
>
> Andreas.
> _______________________________________________
> gtkmm-list mailing list
> gtkmm-list@gnome.org
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>
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