Is there a way to draw lines on a graph for an existing PDF? I have a custom graph that I need to plot the lines for and I wanted to see if there was anyway to do it with itext or any other open source PDF software. Thank you for your consideration of this matter.
First take a look at the StampText example. It shows you how to create a PdfStamper
and how to obtain a PdfContentByte
object. In this example, we stamp text on the existing PDF.
You want to draw lines, which also requires a PdfContentByte
because that class has an abundance of methods to draw paths and shapes. These methods are all explained in chapter 14 of my book . See for instance paths.pdf and the code that was used to draw these paths, PathConstructionAndPainting .
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