Erik Sandberg schreef:
OK. Should I try to do the same for created grobs, too? It shouldn't be that
difficult, just add some code to the make_item macro, which registers an init
function that adds the symbol to a list. There will be problems with a few
engravers (piano-pedal and system-start-delimiter), but those should be
solvable.
Hi,
I had a brief thought over this. It would be possible to do this, by
changing the mechanics of creating grobs. Rather than doing
clef = make_item("Clef", cause)
we should use C++ function that have a similar mechanism to listners and
acknowledgers, ie.
DECLARE_CREATOR(clef);
..
clef = make_clef (cause);
..
using some layers, make_clef will call
Grob *
Clef_engraver::create_clef (SCM cause)
{
return make_item ("Clef", cause);
}
Of course, this is the standard, default case, which would be
done with a IMPLEMENT_DEFAULT_CREATOR() macro.
However, if we have this, it would be feasible to register/override
Scheme functions for creation, eg.
\set Staff.clefEngraverClefCreator =
#(lambda (context cause . other_args)
(let*
((c (ly:context-make-grob context 'Clef)))
(ly:grob-set-property! c 'cause cause)
c))
this would make it possible to softcode loads of functionality, in terms
of connecting grobs and setting grob properties.
--
Han-Wen Nienhuys - [EMAIL PROTECTED] - http://www.xs4all.nl/~hanwen
LilyPond Software Design
-- Code for Music Notation
http://www.lilypond-design.com
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