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From: | Jan-Peter Voigt |
Subject: | Re: Engraver Programming Question |
Date: | Wed, 24 Sep 2014 20:57:34 +0200 |
User-agent: | Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 |
Hi Jay,
to output something, you have to display it. The format function returns the formatted string. If you insert #t (true) prior the format string, it will output the result to stdout:
HTH Jan-Peter Am 24.09.14 20:31, schrieb Jay Vara: I am not top-postingI tried to build in a way to get the measurePosition and measureLength in a user defined engraver (lines 13 and 14). The idea was to change them as needed. As a first step, I wanted to print the values - I tried putting in a format statement (line 23). The program runs without errors, but does not produce any output. What seems to be the problem with lines 15, 16 (commented out) and 23? \version "2.18.2" measure-len = 1 measure-pos = 1 note-names = "Sa" #(define SolfegeEngraver (list (cons 'acknowledgers (list (cons 'note-head-interface (lambda (engraver grob source-engraver) (let* ((context (ly:translator-context engraver)) (tonic-pitch (ly:context-property context 'tonic)) (measure-pos (ly:context-property context 'measurePosition)) (measure-len (ly:context-property context 'measureLength)) ; (measure-pos 0) ; (ly:context-set-property! context 'measurePosition measure-pos) (tonic-name (ly:pitch-notename tonic-pitch)) (delta (- 7 tonic-name)) (solfege-base (circular-list "S" "R" "G" "M" "P" "D" "N")) (solfege (take (drop solfege-base delta) 7)) (note-names (apply vector solfege))) (format "length ~a position ~a note-names ~a ~%" measure- len measure-pos note-names) ; (display solfege)(newline) (ly:grob-set-property! grob 'note-names note-names)) ))))) ) \score { \new Staff { \new Voice { \easyHeadsOn \relative c' { c d e f g a b c } } } \layout { \context { \Voice \consists \SolfegeEngraver } } } _______________________________________________ lilypond-user mailing list address@hidden https://lists.gnu.org/mailman/listinfo/lilypond-user |
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