🚀 go-pugleaf

I'm trying to change a TextField' content while the user is editing it.
I replaced the TextFilterFunc for that TextField, and I want to do some
fancy replacement to the text when the user press some keys. 

My textFilterFunc prototype is
char * textFilterFunc (id textObj, char * inputText, int * inputLength,
		       int position);

I tried to do a "[[textObj setSel:startPos :endPos] replaceSel:replacement]"
where of course startPos and endPos are integer position *inside* the text,
and replacement is a string computed from the previous content.

What I see on the screen is the field get blanked... or something very similar.

I also tried using [textObj superview] and the setStringValue: on that
TextField id, but the same happened.

How can I obtain the result I want? In few word, what I like to see is that
whenever the user types BACKSPACE, the current character will be replaced by
a blank, instead of getting deleted.

thanx a lot for any hints ...and forgive my poor english ;-)
lele.
-- 
Lele Gaifax - lele@itnsg1.cineca.it
Sicuramente i cattivi hanno scoperto qualche cosa che i buoni ignorano.
						- Woody Allen