Alignment of text mark in a function

[Ed Gordijn]

Hi,

Last week a posted a request (see "Adding text to rehearsal marks") for help but so far didn't get any response. Therefore I decided to split the problem in pieces, starting with the alignment of text marks.

I want to print a mark that consist of a rehearsal mark and a text and want to align it on the center of the rehearsal mark. I know how I would this manually:

    \once \override Score.RehearsalMark #'self-alignment-X = #-0.83
    \mark \markup { \bold { \box "10" \normalsize "Theme from 007" }}

But I want this in a function so I could use it with other text and marks.

I worked out two options. The first option (IIa in the script) is the manual approach. This works fine but although I know how to calculate the override value in a markup script I don't know how I should get the result in the override. Is that possible?

Option IIb is something that I got from a snippet about centering Dynamics (see http://old.nabble.com/dynamic-alignment-td30444495.html). It works almost, but doesn't behave as I would expect when the mark is aligned on the clef. Can that be solved?

Greetings, Ed

CenterMark.ly
Description: Text document

CenterMark.pdf
Description: Adobe PDF document