Hi Ulrike,
On Wed, May 27, 2026 at 10:44 (+0200), Ulrike Fischer wrote:
> Am Mon, 25 May 2026 22:30:42 +0200 schrieb Jean-Pierre Delange via
> ntg-context:
>> Jim,
>> I made a few controlled tests with a minimal ConTeXt example containing
>> only radio fields.
>> Results:
>> * the PDF compiles correctly;
>> * the radio widgets are present;
>> * Acrobat displays them correctly;
> I compiled that example with a current context in texlive 2026
> (ConTeXt ver: 2026.04.27) on window 11 and the field doesn't work
> for me. Adobe refuses to select a button, and in foxit all buttons
> are selected together.
One of the reasons I had an extra button in my original example is because
I discovered that without selecting a default "chosen" button, strange
things (like all buttons being chosen, or two buttons being chosen)
happened. Of course that is a work-around, not a desired requirement.
I have a prehistoric Acroread 9.5.5 which happily selects exactly one
button in my example code. And that code seemed to work with various
versions of windows and Adobe readers, according to people I asked. Things
were mostly good, except for print outs not showing the buttons.
> I looked into the PDF (after using \setupbackend[level=0])
> and one can see that field is missing the values, only /Aaa is
> mentioned, but no /Bbb and /Ccc:
> 3 0 obj
> << /FT /Btn /Ff 33603584 /Kids 2 0 R /T (choice) /V /Aaa >>
> endobj
> 4 0 obj
> << /Type /Annot /BS << /S /I /W 1 >> /F 4 /H /N /Parent 3 0 R
> /Subtype /Widget /Rect [ 97.44189 677.658381 108.408258 688.624749 ]
> endobj
> 5 0 obj
> << /Type /Annot /BS << /S /I /W 1 >> /F 4 /H /N /Parent 3 0 R
> /Subtype /Widget /Rect [ 149.454104 677.658381 160.420472 688.624749
> ] >>
> endobj
> 6 0 obj
> << /Type /Annot /BS << /S /I /W 1 >> /F 4 /H /N /Parent 3 0 R
> /Subtype /Widget /Rect [ 198.957112 677.658381 209.92348 688.624749
> ] >>
> endobj
> There are also no appearances streams but this is only required in
> PDF 2.0.
> Wenn I do something similar with LaTeX then the field contains an
> /Opt array:
> << /T (choice) /FT /Btn /Opt 5 0 R /V /0 /DV /0 /Kids 7 0 R /Ff
> 33587200 >>
> This array references the values:
> 5 0 obj
> [ (\376\377\000A\000a\000a) (\376\377\000B\000b\000b)
> (\376\377\000C\000c\000c) ]
> endobj
> And the widgets reference the array values by index (we are using
> appearance streams, so the setup is more complicated).
> The radio field correctly prints for me.
> \RequirePackage{pdfmanagement}
> \SetKeys[document/metadata]{uncompress}
> \documentclass{article}
> \usepackage{l3pdffield}
> \begin{document}
> \ExplSyntaxOn
> \pdffield_setup:n{preset-radiobutton={setannotflags=Print}} %make
> field printable
> \pdffield_radio:n
> {
> group = choice,
> value = Aaa,
> }\quad
> \pdffield_radio:n
> {
> group = choice,
> value = Bbb,
> }\quad
> \pdffield_radio:n
> {
> group = choice,
> value = Ccc,
> }
> \ExplSyntaxOff
> \end{document}
Thanks very much for the analysis and the example. (Too bad the example
doesn't work with evince, but I can imagine that is an evince issue.)
Your example works well with my ancient Acroread, and its printout clearly
displays the selected button.
Cheers.
Jim
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