Now, the part which is not working is on the second panel (FormPanel). It contains an RadioGroup which I would like to control by keychars [0..9] and [a..z]. The radiobuttons are now only selectable by the arrow keys (standard functionality).
The listener keypress/down/up works with an textfield but not with the radiogroup or radiobutton. Who knows how to override RadioGroup to have the keypresses fired?