A.14. GtkButton

void GtkButton::pressed	(GtkButton *,
                       	 gpointer);
void GtkButton::released	(GtkButton *,
                        	 gpointer);
void GtkButton::clicked	(GtkButton *,
                       	 gpointer);
void GtkButton::enter	(GtkButton *,
                     	 gpointer);
void GtkButton::leave	(GtkButton *,
                     	 gpointer);