2 cluster-engraver.cc -- implement Cluster_engraver
4 (c) 2002--2003 Juergen Reuter <reuter@ipd.uka.de>
6 Han-Wen Nienhuys <hanwen@cs.uu.nl>
12 #include "note-head.hh"
13 #include "note-column.hh"
14 #include "group-interface.hh"
16 class Cluster_spanner_engraver : public Engraver
20 TRANSLATOR_DECLARATIONS(Cluster_spanner_engraver);
21 virtual bool try_music (Music *);
22 virtual void process_music ();
23 virtual void acknowledge_grob (Grob_info);
24 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 if (finished_spanner_ )
56 typeset_grob (finished_spanner_);
57 finished_spanner_ = 0;
62 typeset_grob (beacon_);
68 Cluster_spanner_engraver::try_music (Music *m)
70 if (m->is_mus_type ("abort-event"))
78 else if (m->is_mus_type ("cluster-note-event"))
80 cluster_notes_.push (m);
87 Cluster_spanner_engraver::process_music ()
89 if (cluster_notes_.size())
91 SCM c0scm = get_property ("centralCPosition");
93 int c0 = gh_number_p (c0scm) ? gh_scm2int (c0scm) : 0;
97 for (int i = 0; i <cluster_notes_.size (); i++)
99 Pitch *pit =unsmob_pitch (cluster_notes_[i]->get_mus_property ("pitch"));
101 int p =( pit ? pit->steps () : 0) + c0;
107 beacon_ = new Item (get_property ("ClusterSpannerBeacon"));
108 beacon_->set_grob_property ("positions",
109 scm_cons (gh_int2scm (pmin),
111 announce_grob (beacon_, cluster_notes_[0]->self_scm ());
114 if (beacon_ && !spanner_)
116 spanner_ = new Spanner (get_property ("ClusterSpanner"));
117 announce_grob (spanner_, cluster_notes_[0]->self_scm ());
120 if (beacon_ && spanner_)
122 add_bound_item (spanner_, beacon_);
123 Pointer_group_interface::add_grob (spanner_, ly_symbol2scm ("columns"), beacon_);
129 Cluster_spanner_engraver::stop_translation_timestep ()
133 cluster_notes_.clear();
138 Cluster_spanner_engraver::acknowledge_grob (Grob_info info)
140 if (!beacon_ && Note_column::has_interface (info.grob_))
142 finished_spanner_ = spanner_;
147 ENTER_DESCRIPTION(Cluster_spanner_engraver,
148 /* descr */ "Engraves a cluster using Spanner notation ",
149 /* creats*/ "ClusterSpanner ClusterSpannerBeacon",
150 /* accepts */ "cluster-note-event abort-event",
151 /* acks */ "note-column-interface",