Re: Help to connect a signal gtkmm

[Lebon Sylvain <lebon efrei Fr>]

Andrew E. Makeev a écrit :

Lebon Sylvain wrote:

Don't know if my first message has been sent so:



Ok so i want to resize  an Gtk::Image each time  that the window  has a
rescale / resize.

this->signal_configure_event().connect(sigc::mem_fun(*this,
&function_resize_and_show_image));

And this doesn't work , i can't figure out why. this is a Gtk::Window

replace signal_configure_event with signal_expose_event, and use saved_width, saved_height values to optimize performance.

-andrew

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Ok i have got the same problem (it's surely my fault :p ) when i compile it:

this->signal_configure_event().connect(sigc::mem_fun(*this,
&function_resize_and_show_image));  or
this->signal_expose_event().connect(sigc::mem_fun(*this,
&function_resize_and_show_image));

the compiler tel me an error (see down). I precise that i am usign devcpp . And that all is working perfetly so i suposed there is somethong wrong in my code.

Thank you to help me.

Sylvain




Error from devcpp compiler log:
C:/Dev-Cpp/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, ExampleWindow>, T_return = bool, T_arg1 = GdkEventExpose*]':
C:/Dev-Cpp/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, ExampleWindow>, T_return = bool, T_arg1 = GdkEventExpose*]'
C:/Dev-Cpp/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,
 ExampleWindow>, T_return = bool, T_arg1 = GdkEventExpose*]'
C:/Dev-Cpp/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, ExampleWindow>, T_return = bool, T_arg1 = GdkEventExpose*]'
hello.cpp:254: instantiated
from here
C:/Dev-Cpp/include/sigc++-2.0/sigc++/functors/slot.h:136: error: void value not ignored as it ought to be
C:/Dev-Cpp/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 = GdkEventExpose
* const&, T_functor = sigc::bound_mem_functor0<void, ExampleWindow>]':
C:/Dev-Cpp/include/sigc++-2.0/sigc++/functors/slot.h:136: 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, ExampleWindow>, T_return = bool, T_arg1 = GdkEventEx
pose*]'
C:/Dev-Cpp/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, ExampleWindow>, T_return = bool, T_arg1 = GdkEventExpose*]'
C:/Dev-Cpp/include/sigc++-2.0/sigc++/functors/slot.h:529: instantiated from `sigc::slot1<T_return, T_arg1>::slot
1(const T_functor&) [with T_functor = sigc::bound_mem_functor0<void, ExampleWindow>, T_return = bool, T_arg1 = GdkEventExpose*]'
C:/Dev-Cpp/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, ExampleWindow>, T_retu
rn = bool, T_arg1 = GdkEventExpose*]'
hello.cpp:254: instantiated from here
C:/Dev-Cpp/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:84: error: no match for call to `(sigc::bound_mem_functor0<void, ExampleWindow>) (GdkEventExpose* const&)'
C:/Dev-Cpp/include/sigc++-2.0/sigc++/functors/mem_fun.h:1781: note: candidates are: T_return sigc::bound_mem_functor0<T_return, T_obj>::operator()() cons
t [with T_return = void, T_obj = ExampleWindow]
C:/Dev-Cpp/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:84: error: return-statement with a value, in function returning 'void'
make.exe: *** [hello.o] Error 1
Execution terminated

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