Re: Key signature and key cancellation need to be aligned

[David Sumbler]

On Tue, 2015-01-27 at 20:26 +0100, Thomas Morley wrote:
> 2015-01-27 12:56 GMT+01:00 David Sumbler <address@hidden>:
> > I use Staff.printKeyCancellation = ##f in my score.
> >
> > At one point the key changes from C major (concert) to C minor.  As the
> > piece is for a standard saxophone quartet, this means that 2 of the
> > instruments change from D major (notated) to D minor, and the other 2
> > change from A major to A minor.
> >
> > A minor, of course, is the "open" key with no sharps or flats, and,
> > notwithstanding the negation of printKeyCancellation, Lilypond correctly
> > prints a key cancellation at this point on the 2 staves that require it.
> >
> > The other 2 parts, in which the key changes from 2 sharps to 1 flat,
> > correctly do not get a key cancellation.
> >
> > So far, so good.
> >
> > The problem is that the actual key signatures on the 2 staves that have
> > them are not vertically aligned with the key cancellations on the other
> > 2 staves.  Instead, they are printed after the key cancellations.  In
> > other words, each of the 2 key signatures is printed as if there were an
> > invisible key cancellation preceding it on the stave.  This looks wrong,
> > and I should like them to appear above and below the actual key
> > cancellations on the other 2 staves.
> >
> > I have experimented with changing KeySignature.X-offset (which had no
> > effect) and KeySignature.extra-offset.  The latter works, but
> > unfortunately the position of the time signature and music which follow
> > remain unchanged, so that there is now an unnecessary gap after the key
> > signatures/cancellations.
> >
> > How can I get the effect I want, and get Lilypond to take account of the
> > change in the position of the key signatures?
> >
> > David
> 
> 
> Hi David,
> 
> how about a minimal example?
> 
> -Harm

Here we are, then: the following illustrates the problem.

\version "2.18.0"
\language "english"

\new StaffGroup <<
    \new Staff \relative c'' {
        \transposition bf
        \time 3/4
        \key d \major
        a2 r4 |
        \key d \minor
        \time 2/4
        R2 |
    }
    \new Staff \relative c'' {
        \transposition ef
        \time 3/4
        \key a \major
        gs2 r4 |
        \key a \minor
        \time 2/4
        R2 |
    }
>>

\layout {
    \context {
        \Staff printKeyCancellation = ##f
    }
}

David