Re: Gtk::Image and mouse click

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

bool
MainWindow::on_image2_button_press( GdkEventButton* ev )
{
...

//Note that these are relative to the widget.
int x = ( int ) ev->x ;
int y = ( int ) ev->y ;

fprintf( stderr, "Clicked %d %d\n", x, y ) ;

...
}

On 12/1/06, Petr Hracek <petr hracek siemens com> wrote:
> Hi
>
> thankx for help.
> With the GdkEventButton compilation is OK.
> And how can I handled coordinates from event.
>
> regards
> Paul Davis wrote:
> > 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
> >> Fax. +420 533 337 252
> >> mailto: petr hracek siemens com
> >>
> >>
> >> _______________________________________________
> >> gtkmm-list mailing list
> >> gtkmm-list gnome org
> >> http://mail.gnome.org/mailman/listinfo/gtkmm-list
> >>
> >>
> >>
>
>
> --
> 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
> Fax. +420 533 337 252
> mailto: petr hracek siemens com