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Re: [Lilypond-auto] Issue 3669 in lilypond: Documentation: accessing the


From: lilypond
Subject: Re: [Lilypond-auto] Issue 3669 in lilypond: Documentation: accessing the grob stencil for a cross-staff glissando
Date: Wed, 27 Nov 2013 07:17:59 +0000

Updates:
Summary: Documentation: accessing the grob stencil for a cross-staff glissando

Comment #3 on issue 3669 by address@hidden: Documentation: accessing the grob stencil for a cross-staff glissando
http://code.google.com/p/lilypond/issues/detail?id=3669

The original bug-reporter is happily and successfully accessing the stencil; he just needed to know that he could call the usual stencil function in his own override of the 'stencil property.

Maybe it would help to add to section Extending:2.7, after
"The procedure always takes a single argument, being the grob."

That procedure may access the usual value of the property, by first calling the function that is the usual callback for that property, which can by found in the
Internals Reference or the file 'define-grobs.scm':
@example
\relative c'' {
  \override Flag #'X-offset = #(lambda (flag)
    (let ((default (ly:flag::calc-x-offset flag)))
      (* default 4.0)))
  c4. d8 a4. g8 }

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