Hi,
INMOAP (I'm not much of a programmer), but
Answer 1: Murray is (nearly always) right- don't use testing unless you like
broken things. It's on a website containing the phrase unstable, after
all...so
the manual is a work in progress.
Answer 2: your bottom line says it all.
The problem with the function is ( sort of ) stated: if you scroll down, you
get
to
/usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:103: error:
return-statement with a value, in function returning 'void'
And when you look again, your call is
m_Notebook.signal_switch_page().connect(sigc::mem_fun(*this,
&ExampleWindow::on_notebook_switch_page) );
But the function you're connecting to is declared as
void ExampleWindow::on_notebook_switch_page(Gtk::Widget* /* page */, guint
page_num)
which means that when the function is called, it wants a page widget and a page
number passed to it- which isn't happening.
If you want to make it work, you have two options. Either change the function
so it doesn't require anything passed to it, or use sigc::bind to pass the
information to it. The information you're trying to pass is accessible through
the notebook itself, so passing it with sigc::bind would seem a good way to
introduce unnecessary complexity. Seeing there's only 2 pages, you could try
something like:
void ExampleWindow::on_notebook_switch_page(/*no parameters passed*/) {
int curr = m_Notebook.get_current_page ();
m_Notebook.next_page();
if(curr == m_Notebook.get_current_page ()){
m_Notebook.prev_page ();
}
}
and see if that compiles ( you'd also have to remove the parameters in the
declaration).
Ian
________________________________
From: Chun Yang <[email protected]>
To: [email protected]
Sent: Tue, 19 October, 2010 6:19:30 PM
Subject: Help on compiling notebook example
Hello,
I am not sure this is the correct way to get help on gtkmm GUI program. Please
let me know.
I am having a compiling error when compiling the notebook example on the
following web-page.
http://library.gnome.org/devel/gtkmm-tutorial/unstable/sec-multi-item-containers.html.en#sec-notebook
This is offendinf code:
m_Notebook.signal_switch_page().connect(sigc::mem_fun(*this,
&ExampleWindow::on_notebook_switch_page) );
Here is the compilation errors:
**********************************************************************************************
[c...@localhost notebook]$ make
g++ -o obj/Linux/examplewindow.o -c -Iinc `pkg-config gtkmm-2.4 --cflags`
src/examplewindow.cpp
In file included from /usr/include/sigc++-2.0/sigc++/functors/slot.h:7,
from /usr/include/sigc++-2.0/sigc++/signal_base.h:28,
from /usr/include/sigc++-2.0/sigc++/signal.h:8,
from /usr/include/sigc++-2.0/sigc++/sigc++.h:23,
from /usr/include/glibmm-2.4/glibmm/signalproxy.h:13,
from /usr/include/glibmm-2.4/glibmm/objectbase.h:23,
from /usr/include/glibmm-2.4/glibmm/wrap.h:26,
from
/usr/include/glibmm-2.4/glibmm/containerhandle_shared.h:25,
from /usr/include/glibmm-2.4/glibmm/arrayhandle.h:23,
from /usr/include/glibmm-2.4/glibmm.h:27,
from /usr/include/gtkmm-2.4/gtkmm.h:29,
from inc/examplewindow.h:4,
from src/examplewindow.cpp:2:
/usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h: In member function
‘typename sigc::adaptor_functor<T_functor>::deduce_result_type<T_arg1, T_arg2,
void, void, void, void, void>::type
sigc::adaptor_functor<T_functor>::operator()(T_arg1, T_arg2) const [with T_arg1
= GtkNotebookPage* const&, T_arg2 = const unsigned int&, T_functor =
sigc::bound_mem_functor2<void, ExampleWindow, Gtk::Widget*, unsigned int>]’:
/usr/include/sigc++-2.0/sigc++/functors/slot.h:173: instantiated from ‘static
T_return sigc::internal::slot_call2<T_functor, T_return, T_arg1,
T_arg2>::call_it(sigc::internal::slot_rep*, typename
sigc::type_trait<T_arg3>::take, typename sigc::type_trait<T_arg4>::take) [with
T_functor = sigc::bound_mem_functor2<void, ExampleWindow, Gtk::Widget*,
unsigned
int>, T_return = void, T_arg1 = GtkNotebookPage*, T_arg2 = unsigned int]’
/usr/include/sigc++-2.0/sigc++/functors/slot.h:180: instantiated from ‘static
void* (* sigc::internal::slot_call2<T_functor, T_return, T_arg1,
T_arg2>::address())(void*) [with T_functor = sigc::bound_mem_functor2<void,
ExampleWindow, Gtk::Widget*, unsigned int>, T_return = void, T_arg1 =
GtkNotebookPage*, T_arg2 = unsigned int]’
/usr/include/sigc++-2.0/sigc++/functors/slot.h:607: instantiated from
‘sigc::slot2<T_return, T_arg1, T_arg2>::slot2(const T_functor&) [with T_functor
= sigc::bound_mem_functor2<void, ExampleWindow, Gtk::Widget*, unsigned int>,
T_return = void, T_arg1 = GtkNotebookPage*, T_arg2 = unsigned int]’
/usr/include/sigc++-2.0/sigc++/functors/slot.h:1184: instantiated from
‘sigc::slot<T_return, T_arg1, T_arg2, sigc::nil, sigc::nil, sigc::nil,
sigc::nil, sigc::nil>::slot(const T_functor&) [with T_functor =
sigc::bound_mem_functor2<void, ExampleWindow, Gtk::Widget*, unsigned int>,
T_return = void, T_arg1 = GtkNotebookPage*, T_arg2 = unsigned int]’
src/examplewindow.cpp:30: instantiated from here
/usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:103: error: no match
for
call to ‘(sigc::bound_mem_functor2<void, ExampleWindow, Gtk::Widget*, unsigned
int>) (GtkNotebookPage* const&, const unsigned int&)’
/usr/include/sigc++-2.0/sigc++/functors/mem_fun.h:1916: note: candidates are:
T_return sigc::bound_mem_functor2<T_return, T_obj, T_arg1,
T_arg2>::operator()(typename sigc::type_trait<T_arg3>::take, typename
sigc::type_trait<T_arg4>::take) const [with T_return = void, T_obj =
ExampleWindow, T_arg1 = Gtk::Widget*, T_arg2 = unsigned int]
/usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:103: error:
return-statement with a value, in function returning 'void'
make: *** [obj/Linux/examplewindow.o] Error 1
[c...@localhost notebook]$
---------------------------------------------------------------------------------------------------------------------------------------------
Thanks,
Chun
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