Re: [gtk-list] Re: GTK--: hello.cc questions

["Jason A. Pfeil" <pfeil nu cs fsu edu>]

About the question as to why the destroy_event_impl is never called, I
would hazard a guess at the risk of sounding presumptious that you didn't
make it a member of the class...
(gint ClassName::destroy_event_impl(GdkEventAny *) {})

--Jason

On 14 Jul 1998, Tero Pulkkinen wrote:

> Ionut Borcoman at debian <borco@mailbox.ro> writes:
> > I am trying my first GTK-- application. I have GTK---0.9.9 and
> > GTK+-1.0.4.
> > 
> > Problem 1:
> > I have compiled the hello.cc and run it. If I press the button b,
> > everithing's OK. But if I close the window via the window manager, I get
> > this:
> > 
> > bash-2.01$ ./hello
> > 
> > ** WARNING **: file gtkobject.c: line 1140 (gtk_object_get_data_by_id):
> > "GTK_IS_OBJECT (object)"
> > 
> > ** WARNING **: gtk_signal_disconnect(): could not find handler (1)
> > 
> > Why do I get these messages ?
> 
> I dont know :) never seen these bbefore :)
> 
> > Problem 2:
> > I would also like to be able to control the closing of the window (to
> > prevent unsaved work to be lost). How can this be done ?
> 
> overriding delete_event_impl -- not destroy_event_impl...
> return value of it determines if gtk automatically destroys
> the widget and with gtk-- it should always be 0. (I think)
> 
> > Problem 3:
> > Another question is related to the function from hello.cc, too:
> > 
> >   gint destroy_event_impl(GdkEventAny *){
> >     Gtk_Main::instance()->quit(); 
> >     return 0;
> >   }
> > 
> > This function is never called ! Why and how do I make it be called ?
> > (this can be checked by changing it in:
> > 
> >   gint destroy_event_impl(GdkEventAny *){
> >     g_print( "destroy event occured\n"); 
> >     Gtk_Main::instance()->quit(); 
> >     return 0;
> >   }
> > 
> > The message "destroy event occured\n" is never printed.)
> 
> I dont really know the original purpose of destroy_event, but
> using delete_event_impl seems to work right. 
> 
> -- 
> -- Tero Pulkkinen -- terop@modeemi.cs.tut.fi --
> 
> -- 
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> 
> 

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Jason A. Pfeil, Computer Science Graduate Student      101 Carothers Hall
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