Hi Bruno,
thanx for the answer; a button is an excellent placeholder and I get the
position with the code you provided.
Nevertheless, there is one drawback when I place the signature over the
button:
When I open such a pdf document with Acrobat Reader (tried with version
7.0.9), it displays a valid signature.
When I click on this valid signature it flickers shortly and displays an
INVALID signature because the document was modified after signing.
Since everything worked fine, before I added this modification, I'm sure
that the reason is the button.
I've already tried disabling this button, but this didn't help.
:-(
Is there a way to remove this button by the signing application before the
signature is created?
best regards
Tom
Bruno Lowagie (iText) wrote:
>
> Baer wrote:
>> 1.) Is there a better way than replacing a placeholder image? Are there
>> some
>> limitations, which make this approach impossible?
>
> OpenOffice is capable of creating PDFs that are forms (AcroForm).
> Instead of an Image, you should use a Button. There's on Open Office
> conference in Brussels on June 10; I'll be presenting a demo on how
> to use OO in combination with iText during the break.
> As soon as I've finished my sample code, I'll put it online.
>
>> 2.) How can I get the page/position/size of the placeholder in order set
>> the
>> location for the signature?
>
> iText is perfectly capable of finding the position of that button.
> AcroFields form = reader.getAcroFields();
> float[] positions = form.getFieldPositions(key);
> for (int i = 0; i < positions.length; ) {
> System.out.print("Page: " + positions[i++]);
> System.out.print(" [ " + positions[i++]);
> System.out.print(", " + positions[i++]);
> System.out.print(", " + positions[i++]);
> System.out.print(", " + positions[i++]);
> System.out.println(" ]");
> }
>
> You can use those positions to add your signature.
>
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