2 cluster-engraver.cc -- implement Cluster_engraver
4 (c) 2002--2005 Juergen Reuter <reuter@ipd.uka.de>
6 Han-Wen Nienhuys <hanwen@cs.uu.nl>
11 #include "note-head.hh"
12 #include "note-column.hh"
13 #include "pointer-group-interface.hh"
16 class Cluster_spanner_engraver : public Engraver
20 TRANSLATOR_DECLARATIONS (Cluster_spanner_engraver);
21 virtual bool try_music (Music *);
22 PRECOMPUTED_VIRTUAL void process_music ();
23 DECLARE_ACKNOWLEDGER(note_column);
24 PRECOMPUTED_VIRTUAL void stop_translation_timestep ();
25 virtual void finalize ();
27 Link_array<Music> cluster_notes_;
30 void typeset_grobs ();
32 Spanner *finished_spanner_;
35 Cluster_spanner_engraver::Cluster_spanner_engraver ()
38 finished_spanner_ = 0;
43 Cluster_spanner_engraver::finalize ()
46 finished_spanner_ = spanner_;
52 Cluster_spanner_engraver::typeset_grobs ()
54 finished_spanner_ = 0;
59 Cluster_spanner_engraver::try_music (Music *m)
61 if (m->is_mus_type ("cluster-note-event"))
63 cluster_notes_.push (m);
66 else if (m->is_mus_type ("busy-playing-event"))
67 return cluster_notes_.size ();
73 Cluster_spanner_engraver::process_music ()
75 if (cluster_notes_.size ())
77 SCM c0scm = get_property ("middleCPosition");
79 int c0 = scm_is_number (c0scm) ? scm_to_int (c0scm) : 0;
83 for (int i = 0; i < cluster_notes_.size (); i++)
85 Pitch *pit = unsmob_pitch (cluster_notes_[i]->get_property ("pitch"));
87 int p = (pit ? pit->steps () : 0) + c0;
93 beacon_ = make_item ("ClusterSpannerBeacon", cluster_notes_[0]->self_scm ());
94 beacon_->set_property ("positions",
95 scm_cons (scm_int2num (pmin),
99 if (beacon_ && !spanner_)
101 spanner_ = make_spanner ("ClusterSpanner", cluster_notes_[0]->self_scm ());
104 if (beacon_ && spanner_)
106 add_bound_item (spanner_, beacon_);
107 Pointer_group_interface::add_grob (spanner_, ly_symbol2scm ("columns"), beacon_);
112 Cluster_spanner_engraver::stop_translation_timestep ()
115 cluster_notes_.clear ();
119 Cluster_spanner_engraver::acknowledge_note_column (Grob_info info)
121 if (!beacon_ && Note_column::has_interface (info.grob ()))
123 finished_spanner_ = spanner_;
128 #include "translator.icc"
130 ADD_ACKNOWLEDGER(Cluster_spanner_engraver, note_column);
131 ADD_TRANSLATOR (Cluster_spanner_engraver,
132 /* descr */ "Engraves a cluster using Spanner notation ",
133 /* creats*/ "ClusterSpanner ClusterSpannerBeacon",
134 /* accepts */ "cluster-note-event busy-playing-event",