Re: problems with learning lilypond

[Simon Mackenzie]

Here is one example which extends the functionality of table of  
contents macros.

%
% toc-number : Begin : right align a string(number) against a preset  
gauge-stencil(####) and return the right aligned result
%

#(define-markup-command (toc-number layout props text) (string?)
        (let*
                (
                        (gauge-stencil (interpret-markup layout props "####"))
                        (x-ext (ly:stencil-extent gauge-stencil X))
                        (y-ext (ly:stencil-extent gauge-stencil Y))
                        (stencil (interpret-markup layout props text))
			(gap (- (interval-length x-ext) (interval-length (ly:stencil-extent  
stencil X))))
                )
		(interpret-markup layout props (markup #:concat (#:hspace gap text  
#:hspace 1)))
        )
)

%
% toc-number : End
%

%
% numTocItem : Begin : Combine two strings and insert them as a single  
tocItemMarkup string into a table of contents.
%

numTocItem = #(define-music-function (parser location num text)  
(string? string?)
	"Add a line to the table of content, using the @code{tocItemMarkup}  
paper variable markup"
        (add-toc-item! 'tocItemMarkup (markup #:line (#:toc-number num text)))
)

%
% numTocItem : End
%

Usage ===================
In each book part I can now insert the Hymn number and the Hymn title  
and each will be correctly aligned and formatted. Elegant solution and  
straightforward usage.

\book
        \bookpart {
                \numTocItem "61." "พระเจ้ายิ่งใหญ่"
                .
                .
                .
        }
        \bookpart {
		\numTocItem "66." "ชีวิตเราพระเจ้า 
ทรงสร้าง"
                .
                .
                .
        }
}

See attached pdf for sample toc output. Note all Hymn numbers are  
correctly right aligned and the Hymn titles are correctly left aligned.
Many thanks to Nicolas Sceaux <address@hidden> for his  
solution to my request posted on address@hidden

Simon

On 13/08/2009, at 02:13, Mark Polesky wrote:

> James E. Bailey wrote:
> > Surely the calculations can be performed outside of lilypond,
> > and then simply input into lilypond for a score, right? Or am I
> > missing something?
>
> Sure, but scheme can greatly facilitate things. I should clarify
> that algorithmic music hardly represents the bulk of my LilyPond
> work, but I mentioned it as an example of something the benefits
> from scheme.
>
> I'll try to respond differently to what you wrote earlier:
>
> > Scheme is, as far as I'm concerned, what other people do to save
> > typing. In fact, I'm of the opinion that there's no need to use
> > Scheme, it's just there if you know how to use it. So, if you
> > take Scheme out of the lilypond learning curve, it's actually
> > not that difficult.
>
> I think what David was saying in his earlier post
> (http://lists.gnu.org/archive/html/lilypond-user/2009-08/ 
> msg00323.html)
> was that he's gotten to the level where he needs scheme to do what
> he wants. As one example, if you need your slurs and ties to hide
> behind time-signatures, scheme is absolutely required, as far as I
> see it:http://lsr.dsi.unimi.it/LSR/Item?id=613
>
> Scheme enables far more functionality than simply saving typing.
> So if you find yourself needing scheme in LilyPond, you may very
> well find yourself fighting its counterintuitive elements.
>
> Certainly scheme isn't "required" to produce beautiful scores, but
> I typeset a lot of contemporary music, and the demands of the new
> notation are simply too great to avoid it. So, as I said, perhaps
> it just depends on your typesetting needs.
>
> - Mark

ThaiMusicBookTOC.pdf
Description: Adobe PDF document