Hook not shown in the final pdf-output?

[Rapid1898-code]

Hello - i try to fill out a form pdf document (templ.pdf):
templ.pdf

Wheni select this in this pdf directly it shows this hooks:

But when i update the pdf-docuement with this statements and save the new pdf-output

...
doc = pymupdf.open("templ.pdf")
field.field_value = True    
field.update()
...
doc.bake(annots=True, widgets=True)
doc.ez_save(fnPDF, garbage=3, deflate=True)
doc.close()
...

There are not hooks in the final output:
out_LTX7979.pdf

How can i get the hooks also in the outputted new pdf-docuement?

[JorjMcKie]

This is probably due to an older PyMuPDF version, which only accepted the recommended PDF value "Yes" for a check box to be checked.
The most recent version now honors also non-recommended values.

[Rapid1898-code]

I don´t understand - i think i have installed the actual PyMuPDF version:
PyMuPDF 1.25.3

[JorjMcKie]

Hm, ok, that's not the reason then.
I looked into the PDF internals and saw specifications which I don't understand.
Normally, the tick mark symbol is used for True, but somewhere in the PDF it is replace that obscure star symbol ... 🤷‍♂️ ... need to look deeper.

[Rapid1898-code]

Thanks a lot for your time and patience!

[JorjMcKie]

I cannot reproduce the problem. The following script does work and produces correct tick marks for both, the update and the baked PDF.
Please that during doc.bake() lots of error messages are shown - which have no negative effect on the result though: they are just a consequence of the non-standard way of how annotations are being created.

doc=pymupdf.open(doc.name)
page=doc[1]
for w in page.widgets():
    if w.field_type==pymupdf.PDF_WIDGET_TYPE_CHECKBOX:
        w.field_value=True
        w.update()

        
doc.ez_save("x.pdf")  # normal check box updates
doc.bake()  # bake all in
MuPDF error: unsupported error: cannot create appearance stream for  annotations
MuPDF error: unsupported error: cannot create appearance stream for  annotations
MuPDF error: unsupported error: cannot create appearance stream for  annotations
...
doc.ez_save("y.pdf")  # save the baked version

x.pdf
y.pdf

[Rapid1898-code]

When i open the y.pdf with ms edge i see this:

When i open the same file with slim pdf reader i see this:

Could this be some problem with my pdf-viewer - and not my program itself?

[JorjMcKie]

This must be a (your) platform problem:
On Windows (all PDF viewers: Adobe, Foxit, ...) and on Linux (evince, firefox browser) everything looks as it should.

The respective font ZapfDingbats is not embedded in the PDF, so the decision what to show is made by the viewer. When e.g. displaying this file under GitHub, I also see those stars. Obviously, the responsible servers for GitHub also have a different opinion about what to display.

[Rapid1898-code]

ok is see - then it seems this was only a displaying problem from the edge-browser...
Thanks a lot for your fast support!