On 03/19/12 06:32, iText Info wrote:
> Op 19/03/2012 12:21, Larry Evans schreef:
>> I have studied the TextFieldActions example which you cited:
>>
>> http://itextpdf.com/examples/iia.php?id=238
>>
>> In particular, in that example, there's:
>>
>> TextField name = new TextField(writer, new Rectangle(130, 806,
>> 256, 780), "name");
>
> TextField is a class that can only be used to CREATE new forms from scratch.
> You can't use it to change existing forms.
>
>> However, my problem is that the .pdf file I'm starting from is:
>>
>> http://www.irs.gov/pub/irs-pdf/f1040.pdf
>>
>> and I couldn't figure a way to get a TextField from that.
>
> Correct. You shouldn't attempt to get a TextField object when dealing
> with an existing PDF.
>
>
>> I could only
>> find a way to get an AcroFields.Item from an AcroFields and a field
>> name;
>
> That's what you need to do.
>
>> however, I could not figure how to get a PdfFormField from an
>> AcroField.
>
> That's not possible. Just like TextField, PdfFormField is used for form
> CREATION only, not for form manipulation. You're on the wrong track if
> that's what you're trying to do.
>
>> Item which I could then use to setAdditionalActions.
>
> You need to add the infrastructure that is needed for an Additional
> Action on the lowest level /AA and related dictionaries.
>
> If it doesn't work, something in your infrastructure is missing. I'm
> working on other assignments, so I don't have the time to look at any
> actual PDFs.
The problem is here:
PdfStamper stamper
= new PdfStamper
( reader
, new FileOutputStream(dest)
, '\0'
, true
);
I wanted to preserve the ability to fill out the form as
shown in the Listing 8.29 of the book; however,
preserving that ability precludes adding any actions, AFAICT.
The attached illustrates this. When the boolean arg to
manipulatepdf is true. the pdf can be filled; however, the
javascript action is not executed. OTOH, when the boolean
arg to manipulatepdf is false, the pdf can no longer
be filled but the javascript action is executed.
BTW, I did read sections 8.7.1 and 8.7.2 of the book
(about Reader-enabling a form); however, since
there was no mention of any javascripts in those
sections, I thought it would work to modify the form
with a javascript and still retain the ability to fill
the form.
-regards,
Larry
/*
* This class what modified from the one in the book
* "iText in Action - 2nd Edition"
* written by Bruno Lowagie (ISBN: 9781935182610)
* For more info, go to: http://itextpdf.com/examples/
* This example only works with the AGPL version of iText.
*/
package part2.chapter07;
import java.io.FileOutputStream;
import java.io.IOException;
import part1.chapter03.MovieTemplates;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.PdfAction;
import com.itextpdf.text.pdf.PdfDestination;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStamper;
import com.itextpdf.text.pdf.PdfWriter;
public class EventsAndOpenAction {
/** The resulting PDF for movie source. */
public static final String RESULT_MOVIE
= "results/part2/chapter07/events_and_open_action_movie";
/** The f1040 source. */
public static final String SRC_F1040
= "resources/pdfs/f1040.pdf";
/** The resulting PDF for f1040 source. */
public static final String RESULT_F1040
= "results/part2/chapter07/events_and_open_action_f1040";
/**
* Manipulates a PDF file src with the file dest as result
* @param src the original PDF
* @param resource a resource that will be used as advertisement
* @param dest the resulting PDF
* @throws IOException
* @throws DocumentException
*/
public void manipulatePdf(String src, String dest, boolean enable_extended)
throws IOException, DocumentException {
// Create a reader
PdfReader reader = new PdfReader(src);
// Create a stamper
PdfStamper stamper;
String dest_ext=String.format("%s_%b.pdf",dest,enable_extended);
if( enable_extended){
stamper= new PdfStamper
( reader
, new FileOutputStream(dest_ext)
, '\0'
, true
);
}
else {
stamper= new PdfStamper
( reader
, new FileOutputStream(dest_ext)
);
}
// Get the writer (to add actions and annotations)
PdfWriter writer = stamper.getWriter();
PdfAction action = PdfAction.javaScript(
"app.alert('OpenAction');", writer);
writer.setOpenAction( action);
// Close the stamper
stamper.close();
}
/**
* Main method creating the PDF.
* @param args no arguments needed
* @throws DocumentException
* @throws IOException
*/
public static void main(String[] args)
throws IOException, DocumentException {
MovieTemplates.main(args);
EventsAndOpenAction e=new EventsAndOpenAction();
e.manipulatePdf( MovieTemplates.RESULT, RESULT_MOVIE, true);
e.manipulatePdf( SRC_F1040, RESULT_F1040, true);
e.manipulatePdf( MovieTemplates.RESULT, RESULT_MOVIE, false);
e.manipulatePdf( SRC_F1040, RESULT_F1040, false);
}
}
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