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 "group-interface.hh"
15 class Cluster_spanner_engraver : public Engraver
19 TRANSLATOR_DECLARATIONS (Cluster_spanner_engraver);
20 virtual bool try_music (Music *);
21 virtual void process_music ();
22 virtual void acknowledge_grob (Grob_info);
23 virtual void stop_translation_timestep ();
24 virtual void finalize ();
26 Link_array<Music> cluster_notes_;
29 void typeset_grobs ();
31 Spanner *finished_spanner_ ;
34 Cluster_spanner_engraver::Cluster_spanner_engraver ()
37 finished_spanner_ = 0;
42 Cluster_spanner_engraver::finalize ()
45 finished_spanner_ = spanner_;
51 Cluster_spanner_engraver::typeset_grobs ()
53 finished_spanner_ = 0;
58 Cluster_spanner_engraver::try_music (Music *m)
60 if (m->is_mus_type ("cluster-note-event"))
62 cluster_notes_.push (m);
65 else if (m->is_mus_type ("busy-playing-event"))
66 return cluster_notes_.size ();
72 Cluster_spanner_engraver::process_music ()
74 if (cluster_notes_.size ())
76 SCM c0scm = get_property ("middleCPosition");
78 int c0 = scm_is_number (c0scm) ? scm_to_int (c0scm) : 0;
82 for (int i = 0; i <cluster_notes_.size (); i++)
84 Pitch *pit = unsmob_pitch (cluster_notes_[i]->get_property ("pitch"));
86 int p =( pit ? pit->steps () : 0) + c0;
92 beacon_ = make_item ("ClusterSpannerBeacon", cluster_notes_[0]->self_scm ());
93 beacon_->set_property ("positions",
94 scm_cons (scm_int2num (pmin),
98 if (beacon_ && !spanner_)
100 spanner_ = make_spanner ("ClusterSpanner", cluster_notes_[0]->self_scm () );
103 if (beacon_ && spanner_)
105 add_bound_item (spanner_, beacon_);
106 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_grob (Grob_info info)
121 if (!beacon_ && Note_column::has_interface (info.grob_))
123 finished_spanner_ = spanner_;
128 ADD_TRANSLATOR (Cluster_spanner_engraver,
129 /* descr */ "Engraves a cluster using Spanner notation ",
130 /* creats*/ "ClusterSpanner ClusterSpannerBeacon",
131 /* accepts */ "cluster-note-event busy-playing-event",
132 /* acks */ "note-column-interface",