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pb with widget and overlay

From: abel elenas
Subject: pb with widget and overlay
Date: Fri, 16 Jul 2004 12:13:48 +0200
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.0) Gecko/20020623 Debian/1.0.0-0.woody.1

i try to write some emacs-lisp code who use "dynamic widget" to make a syntaxique editor.

I have some trouble with the field-overlay properties of my widget, when
one of my widget change (deleted) or when a new one appears. The value of this properties change in a curious fashion. I can't put here all my test but let's see a few of them.
1   5    10    15    20    25    30
^              ^                                overlay for the first           
               ^                  ^              overlay for the 2

if u activate the push_button_widget he is deleted and a second editable-field is inserted BUT
1   5    10    15    20    25    30
^                                  ^ the overlay length of the first
                                        widget change as a side effect
                                        and i dono why
                ^                  ^ the second one is good

other probleme

when i use a editable field after a read-only char the first char
of my widget is read-only as well and i don't understand why.

the 2 file i have write are on the web at

the line i have write to correct the overlay bug are commented in
a special fashioned : ; *** my_commment ***

If a emacs lisp guru can have a look on that and tell my why i need
all this line and how i can avoid it...

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