Re: Text centralized above a TextSpan

[David Nalesnik]

Hi Kieren,

On Sat, Sep 19, 2015 at 9:10 AM, Kieren MacMillan <address@hidden> wrote:

Hi David,

> Sure, no problem.  I added a 'line-Y-offset property which just raises/lowers the line without any reference to the texts.

Perfect! Thanks.
(To my eye, a setting of about 0.0875 is right.)

Ah, OK.  I see what the issue is.  The lines are drawn centered to the baseline.  (Up TextSpanner.thickness and you'll get a vivid demonstration.)

This correction can be automated.  Try running this example:

\relative c' {

  \override TextSpanner.thickness = 5

  \override TextSpanner.line-X-offset = #'(0.5 . 0.5)

  \override TextSpanner.line-Y-offset =

  #(lambda (grob)

     (let* ((line-th (ly:staff-symbol-line-thickness grob))

           (th (* (ly:grob-property grob 'thickness 1.0) line-th)))

       (/ th 2.0)))

  \addTextSpannerText #'("ral" "len" "tan" "do")

  c1\startTextSpan

  d'1\stopTextSpan

}

--David