-#(define (box-molecule xext yext)
- (ly-make-molecule
- (list 'filledbox (- (car xext)) (cdr xext)
- (- (car yext)) (cdr yext))
- xext yext)
-)
-
-#(define (widen-interval iv amount)
- (cons (- (car iv) amount)
- (+ (cdr iv) amount))
-)
-
-#(define (make-molecule-boxer callback)
- (define (molecule-boxer grob)
- (let*
- (
- (mol (callback grob))
- (box-padding 0.1)
- (x-ext (widen-interval (ly-get-molecule-extent mol 0) box-padding))
- (y-ext (widen-interval (ly-get-molecule-extent mol 1) box-padding))
- (rule-thick 0.1)
- (x-rule (box-molecule (widen-interval x-ext rule-thick)
- (cons 0 rule-thick)))
- (y-rule (box-molecule (cons 0 rule-thick) y-ext))
- )
-
- (set! mol (ly-combine-molecule-at-edge mol 0 1 y-rule (* 0.5 box-padding)))
- (set! mol (ly-combine-molecule-at-edge mol 0 -1 y-rule (* 0.5 box-padding)))
- (set! mol (ly-combine-molecule-at-edge mol 1 1 x-rule 0.0))
- (set! mol (ly-combine-molecule-at-edge mol 1 -1 x-rule 0.0))
-
- mol
- ))
- molecule-boxer
- )
-
-
- \score { \notes {