For the already mentioned draw-dashed-line-markup one can specify full-length
#f to insist on the given on/off-values.
In the code below I added such a markup with full-length #f, on 0.8, off 8.
(It's red colored.)
Which mimics the settings for dash-fraction/period in your initial example.
The markup is moved in order to start exactly where the default
dashed-text-spanner-line starts. Values for that are calculated based on the
spanner-stencil values. See the commented code for ly:stencil-expr.
~~~
\relative c' {
\override TextSpanner.dash-period = #8
\override TextSpanner.dash-fraction= #0.1
\override TextScript.color = #red
% \override TextSpanner.after-line-breaking =
% #(lambda (grob)
% (pretty-print
% (ly:stencil-expr (ly:grob-property grob 'stencil))))
<>^\markup
\translate #'(2.913177952755998 . 0)
\override #'(full-length . #f)
\override #'(on . 0.8)
\override #'(off . 8)
\draw-dashed-line #'(14.1179170455133 . 0)
\override TextSpanner.bound-details.left.text = "im"
e1\startTextSpan e1 e1\stopTextSpan
<>^\markup
\translate #'(6.839658267716501 . 0)
\override #'(full-length . #f)
\override #'(on . 0.8)
\override #'(off . 8)
\draw-dashed-line #'(10.1914367305527 . 0)
\override TextSpanner.bound-details.left.text = "immer"
e1\startTextSpan e1 e1\stopTextSpan
}
~~~
Attached the output image.
I think something like the red markup should never become the default.
Even as an option - - - why?
Ok, I _had_ coded that full-length-true/false-option in the markup myself.
But this was pure paranoia ...
Though, I'm afraid implementing such an option into TextSpanner.stencil would
mean C++-work. So I can't do it myself.
Attachments:
-
[atest-92.png](https://sourceforge.net/p/testlilyissues/issues/_discuss/thread/f24505bf3a/807a/8ae8/attachment/atest-92.png)
(8.4 kB; image/png)
---
** [issues:#5539] TextSpanner: left text incorrectly influences dashes**
**Status:** New
**Created:** Sat Jul 20, 2019 08:17 AM UTC by Werner LEMBERG
**Last Updated:** Sat Jul 20, 2019 09:17 PM UTC
**Owner:** nobody
**Attachments:**
-
[text-spanner-wrong-dash-spacing.png](https://sourceforge.net/p/testlilyissues/issues/5539/attachment/text-spanner-wrong-dash-spacing.png)
(4.6 kB; image/png)
[git commit 49f41bf1c64ae1e2490571e73a85cbc4b2a9fb27]
~~~~
\version "2.21.0"
\header { texidoc = "
For a text spanner, the length of the (left) text element
must not influence the distance between and the length of
dashes.
Here is a counterexample.
" }
\relative c' {
\override TextSpanner.dash-period = #8
\override TextSpanner.dash-fraction= #0.1
\override TextSpanner.bound-details.left.text = "im"
e1\startTextSpan e1 e1\stopTextSpan
\override TextSpanner.bound-details.left.text = "immer"
e1\startTextSpan e1 e1\stopTextSpan
}
~~~~
---
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