This was an attempt to do a direct translation from what I had in the
"classic" rcsetup.py. (The previous version in mplconfig.py was
semantically incorrect.) I had tested this with settings in my
matplotlib.conf, but didn't realise that the default wasn't validated
(and thus not interpreted into a FontPropertiesProxy object).
Darren Dale wrote:
> I am trying to work out some way to make rcdefaults() work with the traited
> config. Along the way, I discovered this in mplconfig:
>
> class mathtext(TConfig):
> cal = T.Trait("['cursive']", mplT.FontPropertiesHandler())
> rm = T.Trait("['serif']", mplT.FontPropertiesHandler())
> tt = T.Trait("['monospace']", mplT.FontPropertiesHandler())
> it = T.Trait("['serif'], style='oblique'",
> mplT.FontPropertiesHandler())
> bf = T.Trait("['serif'], weight='bold'", mplT.FontPropertiesHandler())
> sf = T.Trait("['sans-serif']", mplT.FontPropertiesHandler())
> use_cm = T.true
> fallback_to_cm = T.true
>
> I dont think that will work. One of the highlights of the new config files is
> that when a file says:
>
> [mathtext]
> rm = ['serif', 'sans-serif']
>
> you actually get a list, not a string, to pass to
> mplT.FontPropertiesHandler().
Right. But it works like:
rm = "['serif', 'sans-serif']"
I realize it's hacky. The most obvious alternative is to expect a
dictionary here, e.g.:
rm = { 'family': ['serif'], 'style': 'oblique' }
But that's less like the FontProperties constructor. My goal was to
make specifying fonts as similar as possible to the FontProperties
object so the user doesn't have to learn a new syntax. Is there a
better way to do this with Traits? Can the user specify the arguments
(with keyword arguments) to a constructor?
Cheers,
Mike
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