2 arpeggio-engraver.cc -- implement Arpeggio_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2001 Jan Nieuwenhuizen <janneke@gnu.org>
10 #include "group-interface.hh"
12 #include "musical-request.hh"
13 #include "arpeggio.hh"
15 #include "local-key-item.hh"
16 #include "rhythmic-head.hh"
17 #include "side-position-interface.hh"
18 #include "staff-symbol-referencer.hh"
20 class Arpeggio_engraver : public Engraver
23 TRANSLATOR_DECLARATIONS(Arpeggio_engraver);
25 virtual void acknowledge_grob (Grob_info);
26 virtual void create_grobs ();
27 virtual void stop_translation_timestep ();
28 virtual bool try_music (Music *);
32 Arpeggio_req *arpeggio_req_;
33 Link_array <Grob> stems_;
34 Link_array<Grob> supports_;
37 Arpeggio_engraver::Arpeggio_engraver ()
44 Arpeggio_engraver::try_music (Music* m)
48 if (Arpeggio_req *a = dynamic_cast<Arpeggio_req*> (m))
58 Arpeggio_engraver::acknowledge_grob (Grob_info info)
62 if (Stem::has_interface (info.grob_l_))
64 stems_.push (info.grob_l_);
68 We can't catch local key items (accidentals) from Voice context,
69 see Local_key_engraver
71 else if (Rhythmic_head::has_interface (info.grob_l_))
73 supports_.push (info.grob_l_);
79 Arpeggio_engraver::create_grobs ()
81 if (!arpeggio_ && !stems_.empty ())
83 arpeggio_ = new Item (get_property ("Arpeggio"));
84 arpeggio_->set_parent (stems_[0], Y_AXIS);
86 for (int i = 0; i < stems_.size (); i++)
88 Pointer_group_interface::add_grob (arpeggio_, ly_symbol2scm ("stems"), stems_[i]);
90 for (int i = 0; i < supports_.size (); i++)
92 Side_position_interface::add_support (arpeggio_, supports_[i]);
94 announce_grob (arpeggio_, arpeggio_req_);
99 Arpeggio_engraver::stop_translation_timestep ()
103 typeset_grob (arpeggio_);
114 ENTER_DESCRIPTION(Arpeggio_engraver,
115 /* descr */ "Generate an Arpeggio from a Arpeggio_req",
116 /* creats*/ "Arpeggio",
117 /* acks */ "stem-interface rhythmic-head-interface",