[REBOL] Re: Field's length
From: antonr::lexicon::net at: 13-Dec-2005 17:22
Try code at bottom:
> Hi List,
> I've got one, simple (hope), question for you.
> I need to manage input and I would like to know if 'field could
> be set with
> a max length to make sure that when I'll write my data on the DB, strings
> will be non longer than what defined in my table.
> If a refinement like this exists, how is called? If there's no such a
> refinement is there a little function I can use to control my input or
> should I write it alone?
> Thank you, Silvia
view layout [
style limited-field field with [
max-length: none ; default is no limit (change this to your desired
feel: make feel  ; clone the feel so we modify only a copy
; add some code after the key handler, binding to 'face
blk: last third second get in feel 'engage ; the block in which edit-text
append blk bind [
if all [
face/max-length < length? face/text
clear skip face/text face/max-length
if all [ ; caret needs fixing?
same? head system/view/caret head face/text
(index? system/view/caret) > face/max-length
system/view/caret: at system/view/caret face/max-length
] blk/2 ; 'face
limited-field with [max-length: 3]
limited-field with [max-length: 10]