Jay Blanton wrote:
I have read a few responses about using PDFStamper to modify a
pre-existing PDF.
I have a few questions. We currently funnel pdfs to a printer that uses
tick marks to determine when a document ends and needs to be folded for
mailing, therefore notifying the printer of when the next document
begins. Can iText read a pre-existing pdf and be able to inform me how
many pages exist in the document, what is the current page, and when
it's on the last page? Also, is it possible to put a tick mark in the
margin of a page from a pre-existing pdf?
Tick marks,
are those the little lines that mark where you can fold a letter?
I don't know if this answers your question, but here is some code:
// PdfReader reads an existing PDF
PdfReader reader = new PdfReader("HelloWorld.pdf");
// PdfStamper writes a new PDF based on the existing one
PdfStamper stamper = new PdfStamper(reader,
new FileOutputStream("HelloWorldStamped.pdf"));
// PdfContentByte is a canvas we can paint on
PdfContentByte canvas;
// reader.getNumberOfPages() tells you the number of pages
int total = reader.getNumberOfPages();
for (int i = 1; i <= total; i++) {
// getOverContent grabs the canvas of a page
canvas = stamper.getOverContent(i);
canvas.setLineWidth(2f);
// with moveTo and lineTo you can add tick marks
canvas.moveTo(0f, 500f);
canvas.lineTo(30f, 50f);
// don't forget this line or nothing will be added
canvas.stroke();
}
Remark: getOverContent allows you to add content on top
of the existing content; getUnderContent draws stuff under
the existing content (for instance a watermark)
br,
Bruno.
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