2 bar-engraver.cc -- implement Bar_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2001 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
25 TRANSLATOR_DECLARATIONS( Bar_engraver );
26 void request_bar (String type_str);
29 virtual void finalize ();
30 virtual void stop_translation_timestep ();
31 virtual void create_grobs ();
40 Bar_engraver::Bar_engraver ()
46 Bar_engraver::create_bar ()
50 bar_p_ = new Item (get_property ("BarLine"));
52 SCM gl = get_property ("whichBar");
53 if (scm_equal_p (gl, bar_p_->get_grob_property ("glyph")) != SCM_BOOL_T)
54 bar_p_->set_grob_property ("glyph", gl);
56 announce_grob (bar_p_, 0);
61 Bar_engraver::finalize ()
67 Bar_engraver should come *after* any engravers that
71 Bar_engraver::create_grobs ()
73 if (!bar_p_ && gh_string_p (get_property ("whichBar")))
80 Bar_engraver::typeset_bar ()
84 typeset_grob (bar_p_);
90 lines may only be broken if there is a barline in all staves
93 Bar_engraver::stop_translation_timestep ()
97 Score_engraver * e = 0;
98 Translator * t = daddy_grav_l ();
99 for (; !e && t; t = t->daddy_trans_l_)
101 e = dynamic_cast<Score_engraver*> (t);
105 programming_error ("No score engraver!");
107 e->forbid_breaks (); // guh. Use properties!
114 ENTER_DESCRIPTION(Bar_engraver,
115 /* descr */ "Create barlines. This engraver is controlled through the
116 @code{whichBar} property. If it has no bar line to create, it will forbid a linebreak at this point",
117 /* creats*/ "BarLine",
119 /* reads */ "whichBar stavesFound",