Hello
I found a good signal: "button-press-event"
On Mon, May 10, 2010 at 4:38 PM, Tadej Borovšak <tadeboro gmail com> wrote:
> You need to keep in mind that GtkButton::clicked signal is an action
> signal, which means that it can be emitted by application without
> button being actually pressed.
http://library.gnome.org/devel/gtk/stable/GtkWidget.html#GtkWidget-button-press-event