2 measure-grouping-engraver.cc -- implement Measure_grouping_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2002--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "side-position-interface.hh"
11 #include "global-context.hh"
12 #include "engraver.hh"
14 #include "translator.icc"
16 class Measure_grouping_engraver : public Engraver
19 TRANSLATOR_DECLARATIONS (Measure_grouping_engraver);
23 Rational stop_grouping_mom_;
25 void process_music ();
26 virtual void finalize ();
27 DECLARE_ACKNOWLEDGER (note_column);
31 Measure_grouping_engraver::finalize ()
35 grouping_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
36 grouping_->suicide ();
42 Measure_grouping_engraver::acknowledge_note_column (Grob_info gi)
46 Side_position_interface::add_support (grouping_, gi.grob ());
51 Measure_grouping_engraver::process_music ()
53 Moment now = now_mom ();
54 if (grouping_ && now.main_part_ >= stop_grouping_mom_ && !now.grace_part_)
56 grouping_->set_bound (RIGHT,
57 unsmob_grob (get_property ("currentMusicalColumn")));
65 SCM grouping = get_property ("beatGrouping");
66 if (scm_is_pair (grouping))
68 Moment *measpos = unsmob_moment (get_property ("measurePosition"));
69 Rational mp = measpos->main_part_;
71 Moment *beatlen = unsmob_moment (get_property ("beatLength"));
72 Rational bl = beatlen->main_part_;
75 for (SCM s = grouping; scm_is_pair (s);
76 where += Rational ((int) scm_to_int (scm_car (s))) * bl,
79 int grouplen = scm_to_int (scm_car (s));
84 programming_error ("last grouping not finished yet");
88 grouping_ = make_spanner ("MeasureGrouping", SCM_EOL);
89 grouping_->set_bound (LEFT, unsmob_grob (get_property ("currentMusicalColumn")));
91 stop_grouping_mom_ = now.main_part_ + Rational (grouplen - 1) * bl;
92 get_global_context ()->add_moment_to_process (Moment (stop_grouping_mom_));
95 grouping_->set_property ("style", ly_symbol2scm ("triangle"));
97 grouping_->set_property ("style", ly_symbol2scm ("bracket"));
105 Measure_grouping_engraver::Measure_grouping_engraver ()
110 ADD_ACKNOWLEDGER (Measure_grouping_engraver, note_column);
111 ADD_TRANSLATOR (Measure_grouping_engraver,
112 /* descr */ "Creates MeasureGrouping to indicate beat subdivision.",
113 /* creats*/ "MeasureGrouping",
115 /* reads */ "beatGrouping beatLength measurePosition currentMusicalColumn",