[IPython-dev] Sans-serif fonts in LaTeX labels for Jupyter widgets?

[Johann Rohwer]

Thanks for your reply. Pardon my ignorance, I am not entirely familiar with 
Jupyter internals. At which point is the MathJax configuration set, and how 
to override this without changing system defaults, i.e. user-specific?

The wiki by Davide reads:

For example, you could tell the HTML-CSS output jax to use the MathJax 
sans-serif font, when possible, in place of its seriffed font. The following 
accomplishes that:

<script type="text/x-mathjax-config"> MathJax.Hub.Config({ "HTML-CSS": 
{availableFonts: ["TeX"]}, MMLorHTML: {prefer: "HTML"} }); 
MathJax.Hub.Register.StartupHook("HTML-CSS Jax Ready",function () { var 
VARIANT = MathJax.OutputJax["HTML-CSS"].FONTDATA.VARIANT; 
VARIANT["normal"].fonts.unshift("MathJax_SansSerif"); 
VARIANT["bold"].fonts.unshift("MathJax_SansSerif-bold"); 
VARIANT["italic"].fonts.unshift("MathJax_SansSerif-italic"); 
VARIANT["-tex-mathit"].fonts.unshift("MathJax_SansSerif-italic"); }); 
MathJax.Hub.Register.StartupHook("SVG Jax Ready",function () { var VARIANT = 
MathJax.OutputJax.SVG.FONTDATA.VARIANT; 
VARIANT["normal"].fonts.unshift("MathJax_SansSerif"); 
VARIANT["bold"].fonts.unshift("MathJax_SansSerif-bold"); 
VARIANT["italic"].fonts.unshift("MathJax_SansSerif-italic"); 
VARIANT["-tex-mathit"].fonts.unshift("MathJax_SansSerif-italic"); }); </script>

placed before the script that loads |MathJax.js| would tell the HTML-CSS 
(and the SVG) output jax to use the appropriate sans-serif fonts as the 
first choices for the normal, bold, and italic mathvariants, effectively 
making variables be italic sans-serif and numbers being upright sans-serif.

So what is the script that loads MathJax.js for the jupyter notebook? I 
could only find a reference to that in a template file,
python2.7/dist-packages/notebook/templates/noteboook.html

I tried pasting the above code into 
~/.ipython/profile_default/static/custom/custom.js but it has no effect. So 
at what point (and where) is MathJax loaded in the jupyter notebook startup, 
and how to change the defaults?

Thanks,
Johann

On 14/02/17 19:58, Jason Grout wrote:
> Good question. In theory, since we use MathJax for the rendering, this 
> would be possible on a local notebook server by modifying the MathJax 
> config in a custom.js file (see 
> http://docs.mathjax.org/en/latest/options/HTML-CSS.html?highlight=stix and 
> http://docs.mathjax.org/en/latest/font-support.html). You could set the 
> preferredFont to null, and use one of the web fonts, for example.
>
> It looks like Davide (author of MathJax) has talked about using sans serif 
> fonts before: 
> https://github.com/mathjax/mathjax-docs/wiki/Can-MathJax-use-font-xxxx%3F. 
> He might have an updated answer if you ask on the MathJax mailing list.
>
> Thanks,
>
> Jason
>
>
> On Tue, Feb 14, 2017 at 9:00 AM Johann Rohwer <jr at sun.ac.za 
> <mailto:jr at sun.ac.za>> wrote:
>
>     The documentation on layout and styling of Jupyter widgets mentions that
>     Label widget can also render LaTeX equations:
>     http://ipywidgets.readthedocs.io/en/latest/examples/Widget%20Styling.html#Latex
>
>     On my machine, these equations render in a serif font by default. Is it
>     possible to change the default font set to use sans-serif fonts,
>     similar to
>     matplotlib's?
>          matplotlib.rcPararams['mathtext.fontset'] = 'stixsans'
>
>     Cheers,
>     Johann
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-- 
Johann M. Rohwer
Professor of Systems Biology, and
Chairperson: Dept. of Biochemistry
Stellenbosch University
Private Bag X1, 7602 Matieland
SOUTH AFRICA
Tel +27-21-8085843     Fax +27-21-8085863
jr at sun.ac.za     http://www.jjj.sun.ac.za
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