If there are no form fields, then there are no radio buttons or check boxes.
They are just circles and rectangles (aka graphic paths). You'd have to do
some significant document analysis heuristics to figure out that a given shape
on the page is a "radio button" or not.
From: Jimmy Talbot [mailto:jimmydtal...@gmail.com]
Sent: Wednesday, November 30, 2011 10:32 AM
To: itext-questions@lists.sourceforge.net
Subject: [iText-questions] How to read radio button, check box states from a
non-form PDF
Hi,
I have a pdf document (created by a 3rd party using RealObjects
PDFreactor<http://www.realobjects.com/index.php?id=808&type=0>), which is not a
form. I'm trying to extract information from that PDF using iTextSharp. I'm
able to extract all the plain text (usingSimpleTextExtractionStrategy), but
there is some information that is represented with radio buttons, which does
not come across in the plain text extracted. I'm a complete beginner with
iTextSharp, so I might be overlooking something very simple. PdfReader.AcroForm
returns null, and PdfReader.AcroFields.Fields has 0 keys. How can I figure out
the state of radio buttons and checkboxes throughout the document? The
documents all have the same structure, so I don't really need the radio buttons
& checkboxes to be labelled; just having a list of items, and knowing whether
they are checked or not would be sufficient.
I've confirmed that the radio buttons are not just images using this
approach<http://stackoverflow.com/a/7993200/68936>.
If the radio buttons are not images, and they are not form fields, what are
they? Just special font characters? Graphic paths? Even in these two latter
cases it must be possible for software to go through the pdf document and
figure out which is checked and which is not?
Thanks
JImmy
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