The main risk is that you are dependent on the viewer to see the field but
if you can control that I suppose that you are ok.
I can have a flag to skip the creation of appearances for this special
cases.

Best Regards,
Paulo Soares

----- Original Message -----
From: "Rich McAneny" <[EMAIL PROTECTED]>
To: "Leonard Rosenthol" <[EMAIL PROTECTED]>;
<[EMAIL PROTECTED]>
Sent: Friday, April 04, 2003 23:20
Subject: RE: [iText-questions] Joining fields using acroform


> (Disclaimer: First I must admit my knowledge of PDF is
> limited and I have not worked with it for a year or
> more, since I originally implemented it.)
>
> True, this does force ADOBE to regenerate this
> information.  Although, loading on the client takes a
> lot less than the 10-12 seconds it takes on the server
> - which the user also has to wait for.
>
> Now if there are potential rendering issues then that
> could be a problem. Isn't ADOBE rebuilding the
> appearances from the original fields added during the
> creation of the form, similar to what iText is doing?
> If not where does it get the appearances - both during
> this 'rebuilding' of the appearances and whenever a
> form is edited using Adobe?
>
> What sort of problems are likely to come up? (We are
> using only Text fields - and these forms are read-only
> forms.)
>
> We have been using this method with another package
> for a year or more with no noticable problems. We have
> been using Reader 3 and 4 and Acrobat 4, but mostly
> version 4 of each.
>
> Thanks for your help!
>
> Rich
>
>
> --- Leonard Rosenthol <[EMAIL PROTECTED]> wrote:
> > At 01:10 PM 4/4/2003 -0800, Rich McAneny wrote:
> > >In working with another PDF package, I found that
> > >there is a PDF value(?) called:
> > >
> > >/NeedAppearances true
> > >
> > >which I needed to add to the AcroForm Object. (This
> > >caused the Appearances to be rebuilt by PDF.
> >
> >          Using NeedAppearances is BAD - it's
> > behavior is inconsistent with
> > different versions of Adobe Acrobat (and OS
> > platforms) and is useless on in
> > other PDF Viewers.
> >
> >          iText does form filling the CORRECT way by
> > generating correct
> > appearances for the data as it fills it in.
> >
> >
> >
> > >I tried this using iText and it worked as well.
> > Below
> > >is the code that I used/changed. It dropped the
> > >creation time from 14-15 seconds down to 2-3.
> >
> >          Because you left appearance generation for
> > client side, so that
> > your user will have to wait longer for their forms
> > to appear - IF they
> > appear at all!  I suggest you spend some time trying
> > this with different
> > versions of Acrobat 3 vs. 4 vs. 5 vs. 5.1, and
> > Reader vs. Approval vs.
> > Acrobat.  You will find some that the user
> > experience will vary greatly AND
> > in some cases will be unacceptable (since the user
> > will see the WRONG THING!).
> >
> >
> > Leonard
> >
> ------------------------------------------------------------------------
> ---
> > Leonard Rosenthol
> > <mailto:[EMAIL PROTECTED]>
> > Chief Technical Officer
> > <http://www.pdfsages.com>
> > PDF Sages, Inc.
> > 215-629-3700 (voice)
> >
>
>
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