Re: baseline-skip affects font size???

[Richard Shann]

Thanks for looking into this - perhaps this explains why such a large
triangle is used for the major 7th, it looks unusual. Perhaps the
original intent was for something smaller but it got altered by the
baseline-skip factor not being what the designer had in mind.
I have realized that I can use the same facilities for creating custom
ornaments (running inkscape to generate an eps file) for creating
customized chord symbols, so I won't need to do more \markup work for
this.
Thank you once again.

Richard

On Wed, 2014-07-30 at 23:43 +0200, Thomas Morley wrote:
> 2014-07-30 17:27 GMT+02:00 Richard Shann <address@hidden>:
> > Dear List,
> >
> > I'm trying to write customized chord symbols, for better visibility when
> > chord charts are displayed on smartphones. In this example I am trying
> > to place an "m" above a white triangle after the chord name.
> > I see that baseline-skip is affecting the size of the white triangle,
> > which doesn't seem to be what's in the documentation.
> > In fact with \override #'(baseline-skip . 0) I get no white triangle
> > visible.
> >
> > \version "2.18.0"
> > chExceptionMusic = {
> >  <c' ees' g'>1 -\markup { \override #'(baseline-skip . 4) \column {  "m"   
> > \tiny \triangle ##f }}
> > }
> > % Convert music to list and prepend to existing exceptions.
> > chExceptions = #( append
> >   ( sequential-music-to-chord-exceptions chExceptionMusic #t)
> >   ignatzekExceptions)
> >
> > \score {
> >
> >  \context ChordNames  {
> >     \set chordNameExceptions = #chExceptions
> >     <c' ees' g'>
> >     }
> > }
> >
> > The example by the way, is fictitious, someone else will be providing me
> > with real examples, but this is the sort of thing that will be needed,
> > trading vertical for horizontal space.
> >
> > Any guidance on this?
> >
> > Richard Shann
> 
> 
> 
> Your observation is correct.
> The triangle-markup-command uses baseline-skip to determine the size.
> 
> Looks very strange to me. I'd call it a bug worth fixing, though I've
> no clue why it was put in this way at first place. Perhaps there was a
> reason.
> 
> cc-ing bug-list
> 
> % c/p from define-markup-cpmmands.scm
> #(define-markup-command (triangle layout props filled)
>   (boolean?)
>   #:category graphic
>   #:properties ((thickness 0.1)
>                 (font-size 0)
>                 (baseline-skip 2))
>   "
> @cindex drawing triangles within text
> 
> A triangle, either filled or empty.
> 
> @lilypond[verbatim,quote]
> \\markup {
>   \\triangle ##t
>   \\hspace #2
>   \\triangle ##f
> }
> @end lilypond"
>   (let ((ex (* (magstep font-size) 0.8 baseline-skip)))
> %                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^
>     (ly:make-stencil
>      `(polygon '(0.0 0.0
>                      ,ex 0.0
>                      ,(* 0.5 ex)
>                      ,(* 0.86 ex))
>                ,thickness
>                ,filled)
>      (cons 0 ex)
>      (cons 0 (* .86 ex)))))
> 
> \markup \override #'(baseline-skip . 0) \triangle ##f
> \markup \override #'(baseline-skip . 1) \triangle ##f
> \markup \override #'(baseline-skip . 2) \triangle ##f
> \markup \override #'(baseline-skip . 3) \triangle ##f
> \markup \override #'(baseline-skip . 4) \triangle ##f
> 
> Cheers,
>   Harm