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Re: Center-aligning objects in Scheme - slight improvement

From: Trevor Bača
Subject: Re: Center-aligning objects in Scheme - slight improvement
Date: Wed, 14 Mar 2007 10:03:36 -0500

On 3/12/07, Maximilian Albert <address@hidden> wrote:
Hi again,

below is a slight improvement of the previous version which saves you
from typing the whole function definition over and over again just to
change the markup text. The function 'hairpinWithCenteredText' takes a
single markup as argument. The usage should be straightforward (see the


%%% begin code %%%

hairpinWithCenteredText = #(define-music-function
                           (parser location text) (markup?)
 \override Voice.Hairpin #'stencil = #(lambda (grob)
   (let ((ext (ly:stencil-extent (ly:hairpin::print grob) 0)))
         (ly:stencil-aligned-to (ly:hairpin::print grob) 0 -1)
             (ly:stencil-aligned-to (ly:text-interface::print grob) 0 0)
             (/ (- (cdr ext) (car ext)) 2)
        \override Voice.Hairpin #'text = $text

hairpinMolto = \hairpinWithCenteredText \markup {\italic "molto"}
hairpinMore  = \hairpinWithCenteredText \markup {\bigger "moltissimo"}

\new Staff {
   \hairpinMolto c'2\< c'2\f
   \hairpinMore  c'2\< c'2\f

%%% end code %%%

Just out of curiosity, can hairpinWithCenteredText add to the standard
distribution? (With magic numbers replaced by constants?)

Trevor Bača

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