Re: [matplotlib-devel] AFM mathtext

[John H. <jdh...@ac...>]

>>>>> "Nicholas" == Nicholas Young <su...@su...> writes:

    Nicholas> On Wed, 2005-10-19 at 12:08 -0500, John Hunter wrote:
    >> Hi this looks very nice!  I have to run now but I'll give you a
    >> quick tip.  kerning controls the inter-letter spacing, and your
    >> Fonts class has to override "get_kern"; the base class always
    >> returns 0

    Nicholas> I had missed this function - but as far as I can see it
    Nicholas> isn't actually called in the majority of cases (only
    Nicholas> where set_font is called on the parent GroupElement -
    Nicholas> which doesn't always happen in any of the common cases
    Nicholas> I've tried).  Am I missing something?

The Group element is the only place kerning is set, but groups are the
right place.  Eg \rm{hi mom} is a group.  I just took a look and
noticed I commented out the place where the kern is set

    def advance(self):
        'get the horiz advance'
        return self.metrics.advance # how to handle cm units?+ self.kern*self.widthm

It looks like I was a bit confused about how to best include the
kerning information, and was experimenting by treating it as a
fraction of the width of an "m".  You may want to try some
alternatives.  But this is where you would start hacking.

JDH