2 bar-engraver.cc -- implement Bar_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
7 Jan Nieuwenhuizen <janneke@gnu.org>
11 #include "score-engraver.hh"
12 #include "musical-request.hh"
13 #include "engraver-group-engraver.hh"
16 #include "engraver.hh"
19 generate bars. Either user ("|:"), or default (new measure)
22 class Bar_engraver : public Engraver
26 VIRTUAL_COPY_CONS(Translator);
27 void request_bar (String type_str);
30 virtual void do_creation_processing ();
31 virtual void do_removal_processing ();
32 void deprecated_process_music();
33 virtual void do_pre_move_processing();
34 virtual void process_acknowledged ();
43 Bar_engraver::Bar_engraver()
46 do_post_move_processing();
50 Bar_engraver::create_bar ()
54 bar_p_ = new Item (get_property ("BarLine"));
56 SCM gl = get_property ("whichBar");
57 if (scm_equal_p (gl, bar_p_->get_elt_property ("glyph")) != SCM_BOOL_T)
58 bar_p_->set_elt_property ("glyph", gl);
60 announce_element (bar_p_, 0);
65 Bar_engraver::do_creation_processing ()
70 Bar_engraver::do_removal_processing ()
76 Bar_engraver should come *after* any engravers that expect bars to
77 modify whichBar in deprecated_process_music () be typeset
80 Bar_engraver::deprecated_process_music()
82 SCM b =get_property ("whichBar");
90 Bar_engraver::process_acknowledged ()
92 deprecated_process_music ();
96 Bar_engraver::typeset_bar ()
100 typeset_element (bar_p_);
106 lines may only be broken if there is a barline in all staffs
109 Bar_engraver::do_pre_move_processing()
113 Score_engraver * e = 0;
114 Translator * t = daddy_grav_l ();
115 for (; !e && t; t = t->daddy_trans_l_)
117 e = dynamic_cast<Score_engraver*> (t);
121 programming_error ("No score engraver!");
123 e->forbid_breaks (); // guh. Use properties!
129 ADD_THIS_TRANSLATOR(Bar_engraver);