iText doesn't look at the list of fields to change the state, you'll have to do
it yourself. It can be done but it's not directly supported.
Paulo
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Paul Ryan
> Sent: Thursday, July 24, 2008 10:51 PM
> To: Post all your questions about iText here
> Subject: Re: [iText-questions] Signing with iText gives
> invalid sig when "mark read-only Signed" event set
>
> Apologies if I wasn't clear. The signature fields in Acrobat
> 8 (and from Acrobat 6 on I think) allow an option to set a
> list of fields ("all", "include", "exclude") to mark as read
> only when the signature field is signed. Basically, it's a
> trigger to do something after signing the field. For
> example, when the employee fills in their "leave" section of
> the form and signs it, the nominated "fill-in" fields can be
> locked to prevent further changes by the next recipient of
> the form (i.e. the supervisor).
>
>
>
> By the way, even if I make the signature field read only,
> iText will still sign it perfectly fine, but that's not what
> I'm asking here.
>
>
>
> Paul.
>
>
> ----- Original Message ----
> From: Paulo Soares <[EMAIL PROTECTED]>
> To: Post all your questions about iText here
> <[email protected]>
> Sent: Thursday, 24 July, 2008 11:21:25 PM
> Subject: Re: [iText-questions] Signing with iText gives
> invalid sig when "mark read-only Signed" event set
>
>
> How can you sign a field if you've marked it as read-only?
>
> Paulo
>
>
> ________________________________
>
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Paul and Jenny Ryan
> Sent: Thursday, July 24, 2008 2:34 AM
> To: [email protected]
> Subject: [iText-questions] Signing with iText gives
> invalid sig when "mark read-only Signed" event set
>
>
> Hi,
>
> We're investigating usage of Acrobat Professional 8.0
> to design a "Staff Leave" form with multiple signature fields
> (employee, supervisor and a certifying signature). The
> following high-level steps have been followed in order to
> demonstrate the problem I'm encountering:
>
> Within Acrobat Professional:
> 1. Create form template. In the properties of the
> "employee signature" field, I click on the "Signed" tab and
> set "Mark as read-only" to a list of specified fillable fields.
> 2. Enable usage rights so that users can save their
> filled in forms to disk.
> 3. Add non-visible certify signature allowing form fill-in.
>
> Using Adobe Reader:
> 4. Open the form template, fill in the fields and save to disk
>
> Using iText:
> 5. Sign the "employee signature" field
>
> Observations:
> - The above steps cause Adobe Reader to cry about
> "Signature is INVALID; The document has been altered or
> corrupted since the signature was applied" on the "employee
> signature" field.
> - If I use iText to verify the signed form, it's fine.
> - If I don't set the "Signed" event (field selection)
> property on the "employee signature" field at step 1 above,
> the signature will be perfectly valid at step 5 above via
> Adobe Reader.
> - If I use Adobe Reader to actually sign the "employee
> signature" field at step 5 with the "Signed" event set, it
> shows the signature is valid and locks (read only) the fields
> specified.
>
> I was hoping to utilise the field list from the
> "Signed" event tab to programmatically loop over and set to
> read only if iText didn't already honour these signature
> properties. It's of no use if the signature appears invalid
> though via Adobe Reader though.
>
> Regards,
> Paul
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