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Re: make-musicglyph-markup puzzle

From: David Kastrup
Subject: Re: make-musicglyph-markup puzzle
Date: Sat, 08 Nov 2014 09:48:09 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux)

Dan Eble <address@hidden> writes:

> I’m having trouble figuring out how to make this function fall back on 
> another time signature style (make-simple-numbered-time-signature-markup 
> fraction) if the requested glyph is not present.
> (define-public (make-glyph-time-signature-markup style fraction)
>     (make-musicglyph-markup (string-append
>                              “timesig.”
>                              (symbol->string style)
>                              (number->string (car fraction))
>                              (number->string (cdr fraction)))))

That's probably not all that easy since a "markup" is just a sequence of
sort-of function calls producing stencils.  And before the calls get
executed, the fonts in question are not yet known.

So you'll probably rather need to write

(define-markup-command (glyph-time-signature ...

since the code executed in _that_ definition is what is called at
stencil creation time.

David Kastrup

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