2 cluster-engraver.cc -- implement Cluster_engraver
4 (c) 2002--2004 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 ("cluster-note-event"))
72 cluster_notes_.push (m);
79 Cluster_spanner_engraver::process_music ()
81 if (cluster_notes_.size ())
83 SCM c0scm = get_property ("centralCPosition");
85 int c0 = gh_number_p (c0scm) ? gh_scm2int (c0scm) : 0;
89 for (int i = 0; i <cluster_notes_.size (); i++)
91 Pitch *pit =unsmob_pitch (cluster_notes_[i]->get_property ("pitch"));
93 int p =( pit ? pit->steps () : 0) + c0;
99 beacon_ = make_item ("ClusterSpannerBeacon");
100 beacon_->set_property ("positions",
101 scm_cons (gh_int2scm (pmin),
103 announce_grob (beacon_, cluster_notes_[0]->self_scm ());
106 if (beacon_ && !spanner_)
108 spanner_ = make_spanner ("ClusterSpanner");
109 announce_grob (spanner_, cluster_notes_[0]->self_scm ());
112 if (beacon_ && spanner_)
114 add_bound_item (spanner_, beacon_);
115 Pointer_group_interface::add_grob (spanner_, ly_symbol2scm ("columns"), beacon_);
121 Cluster_spanner_engraver::stop_translation_timestep ()
125 cluster_notes_.clear ();
130 Cluster_spanner_engraver::acknowledge_grob (Grob_info info)
132 if (!beacon_ && Note_column::has_interface (info.grob_))
134 finished_spanner_ = spanner_;
139 ENTER_DESCRIPTION (Cluster_spanner_engraver,
140 /* descr */ "Engraves a cluster using Spanner notation ",
141 /* creats*/ "ClusterSpanner ClusterSpannerBeacon",
142 /* accepts */ "cluster-note-event",
143 /* acks */ "note-column-interface",