Re: Gtk::Image and mouse click

["Paul Davis" <pjdavis engineering uiowa edu>]

Is it just me, or should that function prototype be:

MainWindow::on_image2_button_press( GdkEventButton* event ) ; ?

And whats on line 201 in MainWindow.cpp?

Paul Davis

On 12/1/06, Petr Hracek <petr hracek siemens com> wrote:
>  I change function on_image2_button_press to the return value bool
>  and allways I return true now,
>  but the result is:
>
>  In header:
>         virtual bool on_image2_button_press(GdkEvent * event);
>
>  In CPP code:
>  bool MainWindow::on_image2_button_press(GdkEvent * event)
>  {
>          Log("Procedure for button press");
>          int x=0;
>          int y=0;
>          image2.get_pointer(x,y);
>          sprintf(message,"X coor: %d, Y coor: %d",x,y);
>          Log(message);
>          imageOperation->getObject(x,y);
>
>          Log("End procedure for button press");
>          return true;
>  }
>
>  and result is:
>  /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 = GdkEventButton* const&, T_functor =
> sigc::bound_mem_functor1<bool, MainWindow, GdkEvent*>]':
>  /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_functor1<bool, MainWindow, GdkEvent*>, T_return = bool,
> T_arg1 = GdkEventButton*]'
>  /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_functor1<bool, MainWindow, GdkEvent*>, T_return = bool,
> T_arg1 = GdkEventButton*]'
>  /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_functor1<bool, MainWindow, GdkEvent*>, T_return = bool,
> T_arg1 = GdkEventButton*]'
>  /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_functor1<bool, MainWindow, GdkEvent*>, T_return = bool,
> T_arg1 = GdkEventButton*]'
>  MainWindow.cpp:201:   instantiated from here
> /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:84:
> error: no match for call to
> '(sigc::bound_mem_functor1<bool, MainWindow, GdkEvent*>)
> (GdkEventButton* const&)'
>  /usr/include/sigc++-2.0/sigc++/functors/mem_fun.h:1850:
> note: candidates are: T_return
> sigc::bound_mem_functor1<T_return, T_obj,
> T_arg1>::operator()(typename sigc::type_trait<T_arg3>::take) const [with
> T_return = bool, T_obj = MainWindow, T_arg1 = GdkEvent*]
>  make: *** [MainWindow.o] Error 1
>
>  regards
>  Petr
>
>  Murray Cumming wrote:
>  On Fri, 2006-12-01 at 14:53 +0100, Petr Hracek wrote:
>
>
>  Hi all,
>
> I know that I wrote following problem before a 2 months but
> unfortunatelly
> I've upgraded my PC from FC5 to FC6 and now it does not work again.
>
>  [snip]
>
> I don't believe this code compiled on FC5 either.
>
>
>
>  and function look like this:
> void MainWindow::on_image2_button_press(GdkEvent * event)
> {
>
>  [snip]
>
> That signal handler should return a bool. Template errors are indeed
> often difficult to understand.
>
>
>
>
>  --
> Petr Hráček, PSE ECT PSS27
> ANFDATA spol. s r.o.
> a SIEMENS Company
> MediaHall, Bidlaky 20, 639 00 Brno, Czech Republic
> Tel. +420 533 337 267
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>
>
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