Here's some code to do it. It has no error checking.
PdfReader pdf = new PdfReader("in.pdf");
PdfStamper stp = new PdfStamper(pdf, new FileOutputStream("out.pdf"));
PdfWriter writer = stp.getWriter();
Image img = Image.getInstance("image.png");
AcroFields af = stp.getAcroFields();
AcroFields.Item item = af.getFieldItem("Button1");
PdfDictionary dic = (PdfDictionary)item.widgets.get(0);
dic = (PdfDictionary)PdfReader.getPdfObject(dic.get(PdfName.AP));
dic = (PdfDictionary)PdfReader.getPdfObject(dic.get(PdfName.N));
dic = (PdfDictionary)PdfReader.getPdfObject(dic.get(PdfName.RESOURCES));
dic = (PdfDictionary)PdfReader.getPdfObject(dic.get(PdfName.XOBJECT));
dic = (PdfDictionary)PdfReader.getPdfObject(dic.get(PdfName.FRM));
dic = (PdfDictionary)PdfReader.getPdfObject(dic.get(PdfName.RESOURCES));
dic = (PdfDictionary)PdfReader.getPdfObject(dic.get(PdfName.XOBJECT));
PdfObject obj = dic.get((PdfName)dic.getKeys().iterator().next());
if (obj.isIndirect()) {
PdfDictionary tg = (PdfDictionary)PdfReader.getPdfObject(obj);
PdfName type =
(PdfName)PdfReader.getPdfObject(tg.get(PdfName.SUBTYPE));
if (PdfName.IMAGE.equals(type)) {
PdfReader.killIndirect(obj);
Image maskImage = img.getImageMask();
if (maskImage != null)
writer.addDirectImageSimple(maskImage);
writer.addDirectImageSimple(img, (PRIndirectReference)obj);
}
}
stp.close();
Paulo
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Dave White
> Sent: Sunday, June 04, 2006 3:58 PM
> To: [email protected]
> Subject: [iText-questions] Change Image button field in
> pre-existing PDF
>
> I see lots of great examples of how to create a new
> PushButton field and
> assign an image to it. I am stuck trying to figure out how to
> read a PDF
> that has a field already in it and assign a "logo" to the existing
> field. I am using AcroFields.setField to assign text values to other
> fields, but I can't figure out how to assign the button image as a
> result of calling getField, getFieldItem, etc.
>
> Is there a way to modify the button image of a field in an
> existing PDF
> template? In a worst case, it looks like I could insert a new
> PushButton
> in the exact same location as the existing one (and then try
> to add an
> image to it), but that doesn't feel "right" to do.
>
> This seems like it is either simple and I missing something easy, or
> impossible...
>
> Any help is MUCH appreciated.
>
> Thanks,
> dave
>
>
>
>
> _______________________________________________
> iText-questions mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/itext-questions
>
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