Actually, I think this might work:
I think PdfStamper from itext might be the answer. Here is some example
code:
try {
PdfReader pdfReader = new PdfReader("HelloWorld.pdf");
PdfStamper pdfStamper = new PdfStamper(pdfReader,
new FileOutputStream("HelloWorld-Stamped.pdf"));
Image image = Image.getInstance("watermark.png");
for(int i=1; i<= pdfReader.getNumberOfPages(); i++){
PdfContentByte content = pdfStamper.getUnderContent(i);
image.setAbsolutePosition(100f, 700f);
content.addImage(image);
}
pdfStamper.close();
} catch (IOException e) {
e.printStackTrace();
} catch (DocumentException e) {
e.printStackTrace();
}
}
We would replace HelloWorld.pdf with a growthchart pdf and instead of
watermark.png use an image of an appropriately sized dot. We would also
call
getOverContent instead of getUnderContent. We could then just add the
dot image wherever we want to plot the data point.
On 9/22/2011 12:33 PM, Tammy Dugan wrote:
We would like to take pre-existing CDC growth chart PDFs and plot a
child's growth point on the curve. I know we could plot the entire
growth curve ourselves and add the patient specific points but I would
like to find a way to use the existing CDC growth chart pdf (it would
be hard to reproduce exactly), and just plot the patient points. Does
anyone know of any java pdf libraries that will allow you to
superimpose plot points on top of an existing pdf?
Thanks,
Tammy Dugan
--
Tammy Dugan
CHIRDL Technical Lead
Children's Health Services Research
IU School of Medicine
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