2 ledger-line-engraver.cc -- implement Ledger_line_engraver =
4 source file of the GNU LilyPond music typesetter
6 (c) 2004--2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
10 #include "group-interface.hh"
12 #include "engraver.hh"
14 class Ledger_line_engraver : public Engraver
19 TRANSLATOR_DECLARATIONS (Ledger_line_engraver);
22 virtual void finalize ();
23 virtual void process_music ();
24 virtual void acknowledge_grob (Grob_info);
27 Ledger_line_engraver::Ledger_line_engraver()
33 Ledger_line_engraver::process_music ()
37 span_ = make_spanner("LedgerLineSpanner", SCM_EOL);
39 span_->set_bound (LEFT, unsmob_grob (get_property ("currentCommandColumn")));
44 Ledger_line_engraver::finalize ()
47 span_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
52 Ledger_line_engraver::acknowledge_grob (Grob_info s)
54 if (!to_boolean (s.grob_->get_property ("no-ledgers")))
55 Pointer_group_interface::add_grob (span_, ly_symbol2scm ("note-heads"),
58 ADD_TRANSLATOR (Ledger_line_engraver,
59 "Creates the spanner to draw ledger lines, and notices objects that need ledger lines",
60 /* creats*/ "LedgerLineSpanner",
62 /* acks */ "ledgered-interface", // ledgered-interface?