Re: Newbie question about signal handler args

[Stefano Esposito <ragnarok email it>]

On Thu, 21 Apr 2005 10:52:26 -0600
"Ansell, Larry" <Larry_Ansell maxtor com> wrote:

> Hi all,
Hi 
 
> When I connect to a signal
> 
> gtk_signal_connect( GTK_OBJECT( button ), "focus-in-event",
>                               GTK_SIGNAL_FUNC( buttonHandler ), argToPass );

If you're using Gtk+2.x, you should use g_signal_connect(GObject *object, GCallback *handler, gpointer data) function instead of the old gtk_signal_connect. If you're using Gtk+1.x you should consider to pass to the version 2.x.

> In my handler,
> [cut]
> I think that (*data) should be my "argToPass", but is "widget" a pointer to the button that got 
> the focus change event?

data is a gpointer to "argToPass", castable to any type of your choice (if you passed an int you'll get it as a gpointer and cast it to return to the original int, same for any other type). The widget argument is the widget that emitted the signal, so for you is a pointer to the button that got the focus change event

Greetings
Stefano

P.S.: If you want to do something when the button is clicked you should consider the clicked event instead of the focus-in
-- 
"Solo due cose sono infinite: l'universo e la stupidita' umana."

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