[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [bounty] context generating function - how to get context def from i
From: |
Janek Warchoł |
Subject: |
Re: [bounty] context generating function - how to get context def from its name? |
Date: |
Fri, 25 Jul 2014 20:05:13 +0200 |
And the missing attachment.
2014-07-25 20:03 GMT+02:00 Janek Warchoł <address@hidden>:
> Hi all,
>
> i got stuck when working on a function that creates custom context
> definitions. The idea is to have a function \newInstrument that would
> take a list of settings and create new customized xxxStaff and
> xxxVoice contexts - something like this:
>
> newInstrument =
> #(define-scheme-function
> (parser location instrName parentName settings)(string? ly:context-mod?)
> ;; ...
> #{
> \layout {
> \context {
> ;; create "instrNameStaff" context, derived from "parentNameStaff",
> ;; with default child "instrNameVoice", and modifications specified
> ;; in "settings" argument
> }
> \context {
> ;; create "instrNameVoice" context, derived from "parentNameVoice",
> }
> }
> #})
>
> As you can see, i want to be able to specify the "parent" instrument
> from which the new instrument will "inherit" settings. For example, i
> want to define a "Vocals" instrument (=> VocalsStaff and VocalsVoice
> contexts, derived from Staff and Voice, respectively) and a "Soprano"
> instrument derived from "Vocals" (=> SopranoStaff and SopranoVoice
> contexts, derived from VocalsStaff and VocalsVoice, respectively).
>
> I managed to write a function that does something like this, but I
> have two problems:
> 1) inside the function, i don't know how to get a context definition
> from its name (i.e. from a string). Right now i have to pass parent
> contexts' definitions as separate arguments, but this means that i
> have three arguments instead of one.
> 2) i didn't manage to get midi stuff done inside the same function as
> the layout stuff - but i think that i'll be able to solve that if i
> have a solution to 1).
>
> I offer €25 bounty for solving 1). I may also offer a bounty for 2)
> if i won't manage to do it myself :)
> See the attachment for the code that i already have.
>
> best,
> Janek
new-instrument.ly
Description: Text Data