2 bar-number-grav.cc -- implement Bar_number_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2001 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"
14 #include "staff-symbol.hh"
17 #include "engraver.hh"
18 #include "translator-group.hh"
21 class Bar_number_engraver : public Engraver
27 virtual void stop_translation_timestep ();
28 virtual void acknowledge_grob (Grob_info);
29 virtual void initialize ();
30 virtual void create_grobs ();
32 TRANSLATOR_DECLARATIONS( Bar_number_engraver );
37 TODO: more advanced formatting via SCM function, perhaps barnumbers
41 Bar_number_engraver::create_grobs ()
43 // todo include (&&!time->cadenza_b_)
44 SCM bn = get_property ("currentBarNumber");
45 SCM smp = get_property ("measurePosition");
46 Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
48 if (gh_number_p (bn) &&
49 !mp.to_bool () && now_mom () > Moment (0))
54 text_p_->set_grob_property ("text",
55 ly_str02scm (to_str (gh_scm2int (bn)).ch_C ()));
61 Bar_number_engraver::Bar_number_engraver ()
67 Bar_number_engraver::initialize ()
70 ugh: need to share code with mark_engraver
72 daddy_trans_l_->set_property ("stavesFound", SCM_EOL);
78 Bar_number_engraver::acknowledge_grob (Grob_info inf)
80 Grob * s = inf.grob_l_;
81 if (Staff_symbol::has_interface (s))
83 SCM sts = get_property ("stavesFound");
84 SCM thisstaff = inf.grob_l_->self_scm ();
85 if (scm_memq (thisstaff, sts) == SCM_BOOL_F)
86 daddy_trans_l_->set_property ("stavesFound", gh_cons (thisstaff, sts));
89 && dynamic_cast<Item*> (s)
90 && s->get_grob_property ("break-align-symbol") == ly_symbol2scm ("Left_edge_item"))
93 By default this would land on the Paper_column -- so why
94 doesn't it work when you leave this out? */
95 text_p_->set_parent (s, X_AXIS);
100 Bar_number_engraver::stop_translation_timestep ()
104 text_p_->set_grob_property ("side-support-elements", get_property ("stavesFound"));
105 typeset_grob (text_p_);
112 Bar_number_engraver::create_items ()
117 SCM b = get_property ("BarNumber");
118 text_p_ = new Item (b);
119 Side_position_interface::set_axis (text_p_,Y_AXIS);
121 announce_grob (text_p_, 0);
124 ENTER_DESCRIPTION(Bar_number_engraver,
125 /* descr */ "A bar number is created whenever measurePosition is zero. It is
126 put on top of all staves, and appears only at left side of the staff.",
127 /* creats*/ "BarNumber",
128 /* acks */ "staff-symbol-interface break-aligned-interface",
129 /* reads */ "currentBarNumber",