Re: TextScript implements self-alignment interface

[Trevor Baca]

On 8/28/05, Han-Wen Nienhuys <address@hidden> wrote:
> Trevor Baca wrote:
> > So the question is: is the pair of self-alignment and extra-offset (in
> > the second example) the best way to center markup relative to
> > *notecenter* or is there a way to specify the
> > position-from-which-relative-measures-are-made (like extra-offset)
> > directly, possibly by referencing the parent grob?
> 
> No, you want to use the same alignment as OctavateEight, ie. using
> 
> (X-offset-callbacks .    (,Self_alignment_interface::centered_on_parent
>                           ,Self_alignment_interface::aligned_on_self)
> 
> check define-grobs.scm for more examples of centered_on_parent.

Nice.

For the at-home audience that might wanna try out the syntax, this will work:

%%%% BEGIN PERFECT CENTERING RELATIVE TO PARENT SNIPPET %%%%

\score {
   \context Staff = "1" {
      c'4^\markup {AA} % regular centering at left note-edge
      c'4_\markup {AA} % regular centering at left note-edge
      \override TextScript #'X-offset-callbacks = #(list
Self_alignment_interface::centered_on_parent
Self_alignment_interface::aligned_on_self)
      \override TextScript #'self-alignment-X = #0
      c'4^\markup {AA} % fiddled centering at notecenter
      c'4_\markup {AA} % fiddled centering at notecenter
      \revert TextScript #'X-offset-callbacks
      \revert TextScript #'self-alignment-X
   }
}

%%%%%%% END PERFECT CENTERING SNIPPET %%%%%%%%%%


Trevor Bača
address@hidden