On Fri, Dec 28, 2012 at 6:19 PM, Olivier Biot <[email protected]>wrote:
> On Fri, Dec 28, 2012 at 6:14 PM, Phil Burfitt > <[email protected]>wrote: > >> From: "Nick Payne" >> >> >> I'm stuck on the last part of getting this working - the part that is >>> eluding me is getting a short vertical line drawn at the RH end of the >>> spanner. According the the Internals reference, UP = 1 and DOWN = -1, and >>> that works fine when I use the return value from the updown function to set >>> TextSpanner.direction in beginStringNum. But when I try to use the value >>> returned from updown in the section of code that is commented out in >>> beginStringNum, I get an error. If I hardcode 1 or -1 instead of updown >>> then the line is drawn as expected. >>> >>> I also tried the righttext function below to draw the line: no error is >>> indicated but neither is the vertical line drawn. >>> >> Oops. Forgot to remove the comment for the right "hook" - here's a corrected version: > This is a spanner with an end 'hook' - I use it for telling in which cello > position a passage should be played: > > \version "2.16.1" > % Allows to draw a dashed text spanner for highlighting sections with a > given playng position in a score > stringNumberSpanner = > #(define-music-function (parser location stringNumber) (string?) > #{ > \override TextSpanner #'style = #'dashed-line > \override TextSpanner #'dash-period = #1.5 > \override TextSpanner #'dash-fraction = #0.5 > \override TextSpanner #'font-size = #-5 > \override TextSpanner #'font-shape = #'upright > \override TextSpanner #'(bound-details left stencil-align-dir-y) = > #CENTER > \override TextSpanner #'(bound-details left text) = \markup { \number > $stringNumber } > \override TextSpanner #'(bound-details right text) = \markup { > \draw-line #'(0 . -1) } > \override TextSpanner #'outside-staff-priority = 500 > #} > ) > > If you need some examples on how & what can be done with spanners, please visit the following link: http://www.lilypond.org/doc/v2.16/Documentation/snippets/expressive-marks#expressive-marks-creating-text-spanners It's where I found my inspiration. >From what I understand you still want to conditionally have an up "hook" ( \markup { \draw-line #'(0 . 1) } ) when the spanner is displayed below the staff and a down "hook" (\markup { \draw-line #'(0 . -1) }) when the spanner appears above the staff. This is something I can't help with, apart from defining 2 music-function instances with each variant hard-coded. Best regards, Olivier
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