Re: Horizontal alignment of DynamicTextSpanner left text

[Jean Abou Samra]

Le 31/01/2022 à 16:54, Simon Albrecht a écrit :
> Hello list,
>
> normally, horizontal alignment of grobs to other grobs is adjusted 
> using self-alignment-X and parent-alignment-X—IIRC, this was 
> homogenised some a couple years ago.
>
> However, when wanting to adjust the alignment of a 
> DynamicTextSpanner’s left bound, I found that this is much less clear 
> for spanners. They have the parent-alignment-X component hidden behind 
> the misleading property name attach-dir, and no default way of 
> adjusting self-alignment-X via grob property (see this thread [1] for 
> workarounds).
>
> I suggest modifying line-spanner-interface to use self-alignment-X and 
> parent-alignment-X in all subproperties of bound-details, and heeding 
> these properties for DynamicTextSpanner and similar grobs.
>
> Best, Simon
>
>
> [1] 
> https://lists.gnu.org/archive/html/lilypond-user/2022-01/msg00389.html


Do you have some knowledge of C++? Unlike vertical
placement, which is a little subtler, horizontal placement
in lily/line-spanner.cc is quite straightforward.
I'd expect a patch for this not to require extensive
knowledge of internals.

Best,
Jean