Re: Need help with Scheme code

[Paolo Prete]

Hi Stefano,

unfortunately, it doesn't increment the counter globally, and the two ids in the SVG file are identical

On Wed, Dec 18, 2019 at 12:12 AM Stefano Troncaro <address@hidden> wrote:

Hi Paolo,

After some googling and tweaking I managed to make the counter you wished:

\version "2.19.83"

#(define* (make-counter #:optional (cnt 0) (inc 1))
   (lambda ()
     (set! cnt (+ cnt inc))
     cnt))

#(define serial (make-counter))

token = -\tweak output-attributes #`((id . ,(string-append "foobar_" (number->string (serial))))) \etc

\relative { c'4 d8 -\token [ e ] f -\token [ g ] c,4 }

I will test your snippet for modifying beams later! Thank you for the work you are doing.

Hope this helps!

Stéfano

El mar., 17 dic. 2019 a las 19:23, Paolo Prete (<address@hidden>) escribió:

In addition, Stefano, If you have time, please try the snippet for tuning the beams (second attachment). Any test of these things are very helpful for me. 

On Tue, Dec 17, 2019 at 11:18 PM Stefano Troncaro <address@hidden> wrote:

Hi Paolo,

Look at this:

\version "2.19.83"

token = -\tweak output-attributes #'((id . "foobar")) \etc

\relative { c'4 d8 -\token [ e ] f2 }

That achieves half of what you want. Now, how to make "foobar" automatically increment I don't know, perhaps someone else can help with that.

Hope that helps!

Stéfano

El mar., 17 dic. 2019 a las 19:06, Paolo Prete (<address@hidden>) escribió:

Hello all,

In order to automate the reverse process of the lilypond+_javascript_ snippets (write the GUI modifications of the grobs to the .ly file) I need to make the following code work:

%%%%%%%%%%%%%%%%%%%%%%%%%

token = \tweak output-attributes  #'((id . "foobar"))

\score
{
   {
      a8 \token [ c' c' c']
   }
}

%%%%%%%%%%%%%%%%%%%%%%%%%

But it doesn't compile.

What's the right way to define the "token" variable?

Note that I can compile on 2.19.84 (but not on 2.19.55) the following code

%%%%%%%%%%%%%%%%%%%%%%%%%

\score
{
   {
      a8 \tweak output-attributes  #'((id . "foobar")) [ c' c' c']
   }
}

%%%%%%%%%%%%%%%%%%%%%%%%%

In addition: how can replace "foobar" with a global variable (string + number) that is incremented at each call of "token"  ?

The ids must be: foobar_1, foobar_2  etc.

Thanks,

Paolo