2 bar-number-grav.cc -- implement Bar_number_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2000 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 "protected-scm.hh"
20 class Bar_number_engraver : public Engraver
25 Protected_scm staffs_;
28 virtual void do_pre_move_processing ();
29 virtual void acknowledge_element (Score_element_info);
31 void do_process_music ();
33 VIRTUAL_COPY_CONS(Translator);
34 Bar_number_engraver();
38 Bar_number_engraver::do_process_music ()
40 // todo include (&&!time->cadenza_b_ )
41 SCM bn = get_property("currentBarNumber");
42 SCM smp = get_property ("measurePosition");
43 Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
45 if (gh_number_p (bn) &&
46 !mp && now_mom () > Moment (0))
51 text_p_->set_elt_property ("text",
52 ly_str02scm (to_str (gh_scm2int (bn)).ch_C()));
56 ADD_THIS_TRANSLATOR(Bar_number_engraver);
58 Bar_number_engraver::Bar_number_engraver ()
68 Bar_number_engraver::acknowledge_element (Score_element_info inf)
70 Score_element * s = inf.elem_l_;
71 if (Staff_symbol::has_interface (s))
73 staffs_ = gh_cons (inf.elem_l_->self_scm_, staffs_);
76 && dynamic_cast<Item*> (s)
77 && s->get_elt_property ("break-align-symbol") == ly_symbol2scm ("Left_edge_item"))
80 By default this would land on the Paper_column -- so why
81 doesn't it work when you leave this out? */
82 text_p_->set_parent (s, X_AXIS);
87 Bar_number_engraver::do_pre_move_processing ()
91 text_p_->set_elt_property ("side-support-elements", staffs_);
92 typeset_element (text_p_);
99 Bar_number_engraver::create_items ()
104 SCM b = get_property ("basicBarNumberProperties");
105 text_p_ = new Item (b);
106 Side_position::set_axis(text_p_,Y_AXIS);
108 SCM prop = get_property ("barNumberDirection");
111 prop = gh_int2scm (UP);
113 text_p_->set_elt_property ("direction", prop);
115 SCM padding = get_property ("barNumberScriptPadding");
116 if (gh_number_p(padding))
118 text_p_->set_elt_property ("padding", padding);
123 ->set_elt_property ("padding",
124 gh_double2scm(paper_l ()->get_var ("interline")));
128 announce_element (text_p_, 0);