Gtk::Layout doesn't receive signals

[Antonio Coralles <noche suapie reflex at>]

i've a class which inherits from Gtk::Window (without overriding 
anything) and in this Window i've a Gtk::ScrolledWindow and in my 
ScrolledWindow lies a class which inherits from Gtk::Layout. While i 
perfectly straightforward can react to expose and button press events 
for my custom Gtk::Layout, by overriding on_expose_event and 
on_button_press_event, i'm not able to to this for key press events or 
scroll events. Allthough i could now start to use my own signals and 
signal handlers, becuase at least my (main window) / (scrolled window) 
receives the signals i'm talking about, i think there must be a more 
elegant way. so, can somebody tell my how to make gtkmm also call 
on_scroll_event and on_key_press_event for my Layout ? maybe i should 
note that i've allready experimented a bit with set_events and 
add_events, but without succes.

thanks,
            antonio