Re: centralising markups above notes

[Jean Abou Samra]

Le 09/04/2021 à 13:59, Gilberto Agostinho a écrit :

>       
>        Hi David, 
>        
>         On 09/04/2021 12:32, David Kastrup wrote: 
>       
> > Where does the documentation suggest that
> >           \center-align (and similar) 
> >           does anything to a single item?  It aligns the things passed
> >           to it, not 
> >           their outside. 
> >          
>       
>         See the Text alignment section in http://lilypond.org/doc/v2.23/Documentation/notation/formatting-text
>         it clearly makes use of a single item with \center-align. 
>        
>         Regardless of the documentation, would you be able to tell me
>         what's the best approach to centre a markup on a note, please?
>         The solution I found (last bar in my previous minimal example)
>         seems very hacky to me as it's mixing two things (\center-align
>         and parent-alignment-x) for the alignment. 
>        
>         Many thanks, 
>         Gilberto 
>

Hi,

    What you are doing is more or less the proper
      way. Objects have two parameters for alignment
      because it should depend on both the extents of
      the aligned object and its parent. This was
      briefly discussed in this recent thread:
      
https://lists.gnu.org/archive/html/bug-lilypond/2021-02/msg00016.html
      
      For what it's worth, you can do
    
      center = \tweak parent-alignment-X 0 \tweak self-alignment-X 0
      \etc
      
      and then it's a matter of
      
      {
          d''1\center ^"III."
      }
      
      Best,
      Jean