Losing check box entries when saving LaTeX-generated PDF form

Question

The code below implements a simple PDF form. Some PDF readers can save the form after it has been filled to a PDF with the new state. This works for the text entry whose entry is saved but the state of any checkbox is lost. Any remedy?

\documentclass{minimal}
\usepackage[pdftex]{hyperref}

\begin{document}
\begin{Form}
    \noindent
    \CheckBox[bordercolor={0 0 0},height=1ex,width=1.5ex,name=yes]{Yes}\quad
    \CheckBox[bordercolor={0 0 0},height=1ex,width=1.5ex,name=no]{No}\quad
    \TextField[name=textfield,width=3cm]{Text:}
\end{Form}
\end{document}

I noted on Mac OS X in the Preview.app that checking a check box alone does not lead the document to be considered as modified. Only entering text leads to a modified state and subsequently only a modified document can be saved. What is special about check boxes?

Maybe this is a reader issue and I would be interested to hear if the example above indeed works. There is a similar question How to get radio boxes right in PDF forms using hyperref? which was closed as off topic.

Edit: I have added name fields for the check boxes. On OS X with Preview.app this still does not solve the problem for me.

Answer 1

PDF forms are very similar to HTML forms. You need to add "name" for the CheckBoxes. this worked, when I tested it with Acrobat Pro.

\documentclass{minimal}
\usepackage[pdftex]{hyperref}
\begin{document}
\begin{Form}
    \noindent
    \CheckBox[bordercolor={0 0 0},height=1ex,width=1.5ex, name=ch1]{Yes}\quad
    \CheckBox[bordercolor={0 0 0},height=1ex,width=1.5ex, name=ch2]{No}\quad
    \TextField[name=textfield,width=3cm,value=default]{Text:}
\end{Form}
\end{document}

Any further processing must be done with JaVaScript. A good bundle of packages is provided by acrotex. The insdljs package provided by acrotex can be very useful for producing forms.