Re: Getting the direction when defining a new markup command

[David Kastrup]

Kevin Barry <address@hidden> writes:

> Dear All,
>
> I am trying to set the direction of an arrow in a markup function
> based on whether the markup is placed above or below the staff, but I
> am ready to give up. Here is a condensed version of my most recent
> attempt. Does anyone know how to do this?
>
> \version "2.19.45"
>
> #(define-markup-command (test layout props arg)
>    (integer?)
>    (let ((dir (lambda (grob)
>                 (if (= UP (ly:grob-property grob 'direction))
>                     -1
>                     1))))
>      (interpret-markup layout props
>        #{
>          \markup { \arrow-head #Y #dir ##f }
>        #})))
>
> \markup \test #1

"based on whether the markup is placed above or below the staff"?  What
staff?  Your example is a bit too minimal.

How about

\version "2.19.45"

#(define-markup-command (test layout props arg)
   (integer?) #:properties ((direction))
     (interpret-markup layout props
       #{
         \markup { \arrow-head #Y #direction ##f }
       #}))

\new Staff {
  c^\markup \test #1 _\markup \test #2
}


-- 
David Kastrup