2 note-head-line-engraver.cc -- implement Note_head_line_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000 Jan Nieuwenhuizen <janneke@gnu.org>
10 #include "group-interface.hh"
12 #include "musical-request.hh"
14 #include "rhythmic-head.hh"
15 #include "side-position-interface.hh"
16 #include "staff-symbol-referencer.hh"
17 #include "protected-scm.hh"
20 Create line-spanner grobs for glissandi (and possibly other) lines
21 that connect note heads.
24 class Note_head_line_engraver : public Engraver
27 VIRTUAL_COPY_CONS (Translator);
28 Note_head_line_engraver ();
31 virtual void acknowledge_grob (Grob_info);
32 virtual void create_grobs ();
33 virtual void stop_translation_timestep ();
34 virtual bool try_music (Music *);
42 Note_head_line_engraver::Note_head_line_engraver ()
50 Note_head_line_engraver::try_music (Music* m)
54 if (Glissando_req *r = dynamic_cast<Glissando_req*> (m))
64 Note_head_line_engraver::acknowledge_grob (Grob_info info)
68 if (Rhythmic_head::has_interface (info.elem_l_))
70 heads_ = gh_cons (info.elem_l_->self_scm (), heads_);
76 Note_head_line_engraver::create_grobs ()
78 if (!line_ && scm_ilength (heads_) > 1)
81 line_ = new Spanner (get_property ("NoteHeadLine"));
82 line_->set_bound (LEFT, unsmob_grob (gh_car (heads_)));
83 line_->set_bound (RIGHT, unsmob_grob (ly_last (heads_)));
85 line_->set_parent (unsmob_grob (gh_car (heads_)), X_AXIS);
86 line_->set_parent (unsmob_grob (gh_car (heads_)), Y_AXIS);
88 line_->set_parent (unsmob_grob (ly_last (heads_)), X_AXIS);
89 line_->set_parent (unsmob_grob (ly_last (heads_)), Y_AXIS);
91 announce_grob (line_, req_);
98 Note_head_line_engraver::stop_translation_timestep ()
102 typeset_grob (line_);
108 ADD_THIS_TRANSLATOR (Note_head_line_engraver);