2 bar-number-grav.cc -- implement Bar_number_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "lily-guile.hh"
11 #include "paper-column.hh"
12 #include "paper-def.hh"
13 #include "side-position-interface.hh"
16 #include "engraver.hh"
17 #include "translator-group.hh"
20 class Bar_number_engraver : public Engraver
26 virtual void stop_translation_timestep ();
27 virtual void acknowledge_grob (Grob_info);
28 virtual void create_grobs ();
30 TRANSLATOR_DECLARATIONS( Bar_number_engraver );
35 TODO: more advanced formatting via SCM function, perhaps barnumbers
39 Bar_number_engraver::create_grobs ()
41 // todo include (&&!time->cadenza_b_)
42 SCM bn = get_property ("currentBarNumber");
43 SCM smp = get_property ("measurePosition");
44 Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
46 if (gh_number_p (bn) &&
47 !mp.to_bool () && now_mom () > Moment (0))
52 text_p_->set_grob_property ("text",
53 ly_str02scm (to_str (gh_scm2int (bn)).ch_C ()));
59 Bar_number_engraver::Bar_number_engraver ()
66 Bar_number_engraver::acknowledge_grob (Grob_info inf)
68 Grob * s = inf.grob_l_;
70 && dynamic_cast<Item*> (s)
71 && s->get_grob_property ("break-align-symbol") == ly_symbol2scm ("Left_edge_item"))
74 By default this would land on the Paper_column -- so why
75 doesn't it work when you leave this out? */
76 text_p_->set_parent (s, X_AXIS);
81 Bar_number_engraver::stop_translation_timestep ()
85 text_p_->set_grob_property ("side-support-elements", get_property ("stavesFound"));
86 typeset_grob (text_p_);
93 Bar_number_engraver::create_items ()
98 SCM b = get_property ("BarNumber");
99 text_p_ = new Item (b);
100 Side_position_interface::set_axis (text_p_,Y_AXIS);
102 announce_grob (text_p_, 0);
105 ENTER_DESCRIPTION(Bar_number_engraver,
106 /* descr */ "A bar number is created whenever measurePosition is zero. It is
107 put on top of all staves, and appears only at left side of the staff.",
108 /* creats*/ "BarNumber",
109 /* acks */ "break-aligned-interface",
110 /* reads */ "currentBarNumber stavesFound" ,