On Sat, Feb 8, 2020 at 10:36 PM Thomas Morley <thomasmorle...@gmail.com>
wrote:
> Am Sa., 8. Feb. 2020 um 22:20 Uhr schrieb Paolo Prete <
> paolopr...@gmail.com>:
> >
> >
>
>
> You could redefine box-stencil to take an additional color-argument.
> Also stencil-boxer to take an optional color-argument:
>
> #(define (box-stencil stencil thickness padding color)
> "Add a box around @var{stencil}, producing a new stencil."
> (let* ((x-ext (interval-widen (ly:stencil-extent stencil 0) padding))
> (y-ext (interval-widen (ly:stencil-extent stencil 1) padding))
> (y-rule
> (stencil-with-color
> (make-filled-box-stencil (cons 0 thickness) y-ext) color))
> (x-rule
> (stencil-with-color
> (make-filled-box-stencil
> (interval-widen x-ext thickness) (cons 0 thickness))
> color)))
> (set! stencil (ly:stencil-combine-at-edge stencil X 1 y-rule padding))
> (set! stencil (ly:stencil-combine-at-edge stencil X -1 y-rule padding))
> (set! stencil (ly:stencil-combine-at-edge stencil Y 1 x-rule 0.0))
> (set! stencil (ly:stencil-combine-at-edge stencil Y -1 x-rule 0.0))
> stencil))
>
> #(define* (make-stencil-boxer thickness padding callback #:optional (color
> red))
> "Return function that adds a box around the grob passed as argument."
> (lambda (grob)
> (box-stencil (callback grob) thickness padding color)))
>
> {
> \override TextScript.stencil =
> #(make-stencil-boxer 0.1 0.3 ly:text-interface::print)
>
> \override Script.stencil =
> #(make-stencil-boxer 0.1 0.3 ly:script-interface::print)
>
> \override NoteHead.stencil =
> #(make-stencil-boxer 0.1 0.3 ly:note-head::print cyan)
> c'4^"foo"->
>
> \override TupletBracket.stencil =
> #(make-stencil-boxer 0.1 0.8 ly:tuplet-bracket::print)
> \tuplet 3/2 { b4 4 4 }
> }
>
> Cheers,
> Harm
>
Thanks to Harm and Aaron.
At this point, is there a way to extend the box by setting four parameters
separately:
top, bottom, left, right
..., instead of the "padding" one ?
Something like:
#(make-stencil-boxer 0.1 #paddingLeft #paddingRight #paddingTop
#paddingBottom ly:script-interface::print cyan)
Cheers,
P
