Re: Request for extending fret diagram features

[address@hidden]

On 6 déc. 2012, at 11:08, Colin Hall <address@hidden> wrote:

> 
> Hi,
> 
> I'm handling a feature request on bug-lilypond for some enhancements
> to the fret diagram features.
> 
> http://lists.gnu.org/archive/html/bug-lilypond/2012-12/msg00002.html
> 
> I don't think the new functionality has been adequately defined by
> those who requested it.
> 
> Could one or more of the devs advise me on whether to accept the
> request, reject it, or press for further definition?
> 
> If you think a request for further definition is the correct response,
> please be specific about what is missing.
> 
> 
> Cheers,
> Colin.

The easiest thing to do would be to create a context property that is a list of 
alists, where each alist corresponds to a string from low to high.  So, for 
example, for a two-string instrument, something like :

\set fretMarkProperties = #'(((color . red) (type . letters) (upsidedown . #f)) 
((color . blue) (type . numbers)))

This can include whatever parameters make sense and can be fed to the fret 
diagram constructor.  After this is implemented, wrapper functions can do what 
this person is talking about (i.e. a Scheme function that identifies 
roots/thirds/fifths and then composes the list of alists accordingly).

So as a request, I'd put "Implement customizable fret-diagram mark properties" 
or something of the like.  How the customizations are used is up to the user.

Cheers,
MS