You have to create first the pdf with the blank field, close it, and
than read it with PdfReader as in the examples. It's always a two step
process.
Paulo
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Ismael F
> Sent: Tuesday, February 12, 2008 8:14 AM
> To: Post all your questions about iText here
> Subject: [iText-questions] signing a blank signature field
> previously created as a signature placeholder
>
> Hello,
>
> As I have read in some posts I've created a blank signature
> field called 'keyfield':
>
>
>
> PdfFormField sig = PdfFormField.createSignature(stamper.getWriter());
>
> sig.setWidget(fieldposition, null);
>
> sig.setFlags(PdfAnnotation.FLAGS_PRINT);
>
> sig.put(PdfName.DA, new PdfString("/Helv 0 Tf 0 g"));
>
> sig.setFieldName(keyfield);
>
> sig.setPage(page);
>
> stamper.addAnnotation(sig, page);
>
>
> Then after pdf manipulation and form filling the document
> needs to be automatically signed.
> with iText but I don't know how to achieve this.
>
> It's possible to get the "PdfSignatureAppearance" linked to
> 'keyfield' blank signature field previously created?
>
> As I have read, I know that I will have to do a 'preclose' to
> calculate document size before 'close' SignatureAppearance,
> but I haven't found any constructor like:
>
> PdfSignatureAppearance tSignatureAppearance =
> tStamper.getSignatureAppearance ("keyfield"); // get
> 'keyfield' signature appearance
>
>
> It's necessary to fill the blank signature field just after
> it has been created with
> PdfStamper tStamper =
> PdfStamper.createSignature(tReader,tOutStream,'\0');
>
> as is explained everywhere?
> http://itextpdf.sourceforge.net/howtosign.html
> http://www.mail-archive.com/[EMAIL PROTECTED]
> net/msg34083.html
> http://www.mail-archive.com/[EMAIL PROTECTED]
> net/msg17968.html
> http://answers.suziana.com/2006/12/12/re-computing-the-signatu
> re-size-before-signing-2.html
>
>
> Thanks a lot!
>
> Ismael Fortuny
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