Arrow keys move focus - how to disable?

["M Razhov" <mrazhov mail ru>]

Hello,

Imagine one is writing a Tetris-like game where you control stuff
by the arrow keys.  So your main game display area is a GtkDrawable.
Now, under it, you have some buttons for special control, and a few
other widgets.  I connect to key_press_event of the drawable to
react to arrow presses.  Now, every time I press an arrow key, my
focus moves away from the Drawable!  How do I avoid this?

/m