Re: [Lilypond-auto] Issue 2445 in lilypond: Center a number above a measure

[lilypond]

Updates:
        Labels: -Patch-needs_work Patch-new

Comment #62 on issue 2445 by address@hidden: Center a number above a  
measure
http://code.google.com/p/lilypond/issues/detail?id=2445#c62

Issue 2445: Add measure counter to LilyPond

This patch allows the user to number groups of successive measures, which  
is useful as an aid to the performer in keeping track of repetitions.   
There is no requirement that the counted measures be repeated, however.   
The number is centered on the measure (discounting prefatory material),  
above the staff by default.

In the case of a measure split across a line break, all segments are  
numbered.  The first number has its normal appearance, while the following  
numbers are enclosed in parentheses.

A new grob, a spanner called `MeasureCounter,' is defined.  Each element of  
a count is an independent instance of this grob.  A new event-class,  
`measure-counter-event,' and a new interface, `measure-counter-interface,'  
are also defined.

The engraver, `Measure_counter_engraver,' must be added to the relevant  
context (probably Staff) in the .ly file.  This engraver has been written  
in Scheme, following the precedent of `Span_stem_engraver.'

The user frames the measures to count with the commands  
`\startMeasureCount' and `\stopMeasureCount.'  The initial number is read  
from a new grob-property, 'count-from, which may be overridden.

http://codereview.appspot.com/6730044