Re: signals of a GtkWindow

["Donna S. Martin" <donna omartin com>]

The delete_event signal handler has a different
prototype than the destroy signal handler.  So,
you can't simply replace destroy with delete_event
in the signal connect.....

> From the RDP
"delete-event"
            gboolean    user_function      (GtkWidget *widget,
                                            GdkEvent *event,
                                            gpointer user_data);
And
"destroy"   void        user_function      (GtkObject *object,
                                            gpointer user_data);

So, you see, you are probably accessing the event pointer, rather
than your user_data since it's not in the same parameter position
as in the destroy prototype.....

HTH,
Donna
----- Original Message -----
From: Ludovic et Marie Nathalie Larue <ludovic larue1 mageos com>
To: <gtk-app-devel-list gnome org>
Sent: Thursday, March 01, 2001 2:09 AM
Subject: Re: signals of a GtkWindow


> Havoc Pennington wrote :
>
> > The delete_event signal corresponds to the "X" button on most window
> > managers.
> >
> > If your WM has two options, "Close" and "Kill", the "Kill" means "kill
> > the app even if the app doesn't want to die", and there is no way to
> > recover from it. You can only recover from the delete_event.
>
> I replaced the "destroy" by "delete_event" :
>    gtk_signal_connect(GTK_OBJECT(gr->fenetre), "delete_event",
>                     GTK_SIGNAL_FUNC(quitter), (gpointer) gr);
> gr->fenetre is the window i want to close, and gr is a pointer to a struct
i
> created to pass more than one argument to the callback 'quitter'.
>
> When i use the "destroy" signal, i have no problem, the callback does what
i
> want it to do.
> But when i simply replace "destroy" by "delete_event", it doesn't work, it
> is as though the pointer gr pointed to nothing. It is not the 'NULL'
> pointer, but I can't access any field of my struct. They are not NULL
> either, but i get an error when i want to use them.
>
> What's wrong with the delete_event ?
>
> Thanks for your answers
>
> Ludo
>
>
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