Re: Help using a Scheme variable in a function

[Matthew Fong]

I tried the following inside the function, and all generate errors. I would
like to use the value of rubricsWidthSU in this override.

\override #'(line-width . \rubricsWidthSU)
\override #'(line-width . #rubricsWidthSU)
\override #'(line-width . ,rubricsWidthSU)


Many thanks,
mattfong

On Sat, Jan 6, 2024 at 3:21 PM Matthew Fong <oxen...@gmail.com> wrote:

> Hello everyone,
>
> I'm feeling somewhat confounded by LilyPond Scheme variables.
>
> I've created some global variables that I want to use in functions so I
> change up some custom spacing only one (as these may vary with staff size)
>
> I defined the following
> #(define kOneStaffUnitInInches 0.0761)
> #(define kContentWidthInches 6.5)
>
> #(define halfInchSU (/ 0.5 kOneStaffUnitInInches))
> #(define contentWidthSU (/ kContentWidthInches kOneStaffUnitInInches))
> #(define rubricsWidthSU (/ (- kContentWidthInches 0.5)
> kOneStaffUnitInInches))
>
> And wrote this function:
> rubricsTest =
> #(define-scheme-function
>     (text)
>     (markup-list?)
>     #{ \markup
>         \line {
>             \hspace #halfInchSU
>             \override #'(line-width . 78.84)
>             \wordwrap #text
>         }
>     #}
> )
>
> \rubricsTest \markuplist { Although it is provided with its own Preface,
> this Eucharistic Prayer may also be used with other Prefaces, especially
> those that present an overall view of the mystery of salvation, such as the
> Common Prefaces. }
>
> -----
>
> I can get \hspace to happily use the variable halfInchSU. However, I
> cannot seem to use the variable rubricsWidthSU with \override
> #'(line-width . 78.84).
>
> I must be missing something very simple?
>
>
> Many thanks,
> mattfong
>
>
>
>