I have to second Elaine's comment.
Due to a very heavy workload right now I didn't have the opportunity to
have a look at your example earlier, but now I *really* like what I see.
I think that you a) probably should go forward implementing a standalone
solution of your approach, but that b) this should also be integrated
into Frescobaldi, because this would probably kick it off and make it
even more widely known. Plus, Frescobaldi should make it easier to write
the code back into the LilyPond file. There are 2-3 people who would be
more than willing to help you with the integration of the functionality
in Frescobaldi.
Best
Urs
Am 13.12.19 um 23:49 schrieb Flaming Hakama by Elaine:
---------- Forwarded message ----------
From: Paolo Pr <[email protected] <mailto:[email protected]>>
To: lilypond-user <[email protected]
<mailto:[email protected]>>
Cc:
Bcc:
Date: Thu, 12 Dec 2019 17:52:58 +0100
Subject: A Javascript test code for modifying ties and slurs with
mouse
I just created a javascript script to change the slurs of the .svg
file produced by Lilypond using the mouse, as I had announced. The
coordinates of the control points of the associated Bezier curve
can be reported in the corresponding .ly file and this completely
avoids the time consuming trial and error process we were talking
about. The script is 100% Javascript native, without any
additional library and I tried it on the Firefox and Chromium
browsers. Let's see how it works.
1) Create a score using the template that shows the control
points, implemented by Aaron (please, re-indent it); I added a
small change to set some attributes on the generated svg tags:
http://lilybin.com/29lnbd/4
2) Generate with Lilypond the .svg file and add to it the
Javascript script implemented by me. To test everything, let's use
JsFiddle:
https://jsfiddle.net/61pb9Le4/
My script is in the lower left pane; in the upper left pane I
pasted the .svg file generated by Lilypond. Note that, to make the
script work, if you create a new JsFiddle, you need to select
"LOAD TYPE" option = "No wrap - bottom of <body>".
3) Modify the slurs by moving the control points with the mouse
4) The coordinates of the modified slur can be displayed by
right-clicking on one of the slur's control points. A string will
appear in the form:
"shape # '((x1. y1) (x2. y2) (x1. y1) (x3. y3) (x4. y4))
PhrasingSlur"
or
"shape # '((x1. y1) (x2. y2) (x1. y1) (x3. y3) (x4. y4)) Slur"
or
"shape # '((x1. y1) (x2. y2) (x1. y1) (x3. y3) (x4. y4)) Tie"
This string must be copied to the .ly file, near the slur to be
modified.
.....................
I wrote all this really in a hurry, and the code needs to be
improved at various points. But the first tests seem to work. Now
I'm trying to figure out what is the best (and portable) way to
automatically include the Javascript script in the .svg file
generated by Lilypond ...
HTH
P
This is fantastic!
I often leave mediocre slurs and ties as is, just because wrangling
them in code is a pain. This will make it much more likely that I'll
have the bandwidth to improve them.
This may help folks who want to try this out, here is how I understand
the intended approach and how I was able to reproduce it locally.
1) Prepare the score for control point tweaking
Include in your lilypond files this new definition
showControlPoints = #(grob-transformer 'stencil (lambda (grob orig)
...
As well as this layout context
\layout {
\context {
\Voice
\override PhrasingSlur.stencil = #showControlPoints
\override PhrasingSlur.output-attributes = #'((class .
"lilySlur")(slurtype . "PhrasingSlur"))
\override Slur.stencil = #showControlPoints
\override Slur.output-attributes = #'((class . "lilySlur")(slurtype .
"Slur"))
\override Tie.stencil = #showControlPoints
\override Tie.output-attributes = #'((class . "lilySlur")(slurtype .
"Tie"))
}
}
2) Create the SVG version.
run lilypond with the option -dbackend=svg
3) Create an HTML page that allows editing
Save the JavaScript code in a file, such as show-control-points.js.
Create an HTML document like this:
<html>
<head><title>Editing Lilypond curves</title>
</head>
<body>
<svg...>...</svg>
<script src="show-control-points.js"></script>
</body>
</html>
I tried to figure out how to include the SVG file by reference, but
either using <img src=""> or <object src="">. But that did not work,
since it would produce objects that do not have width or height
attributes accessible via JavaScript. Seems like the SVG has to be
inline in the HTML document for this approach to work.
In terms of workflow, I would probably create this HTML document
subsequent to creating the SVG using a script:
#!/usr/local/bin/bash
# Usage: create-html-for-svg.sh svgFileName htmlFileName
SVG=$1
HTML=$1
echo "<html>" > $HTML
echo "<head><title>Editing Lilypond curves</title>" >> $HTML
echo "</head>" >> $HTML
echo "<body>" >> $HTML
echo "" >> $HTML
cat $SVG >> $HTML
echo "" >> $HTML
echo "<script src="edit-control-points.js"></script>" >> $HTML
echo "</body>" >> $HTML
echo "</html>" >> $HTML
echo "" >> $HTML
Then invoke it like:
$ create-html-for-svg.sh example.svg edit-curves.html
4) Open HTML page in a browser and edit curves
move the points around, right click to get the \shape definition,
5) Update lilypond source
For each curve you modify, apply that shape modification in your
lilyond source.
To generate the final document, remove the \layout section that we
added in step 1.
Thanks,
Elaine Alt
415 . 341 .4954 "/Confusion is highly underrated/"
[email protected] <mailto:[email protected]>
Producer ~ Composer ~ Instrumentalist ~ Educator
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
