2 cluster-engraver.cc -- implement Cluster_engraver
4 (c) 2002--2007 Juergen Reuter <reuter@ipd.uka.de>
6 Han-Wen Nienhuys <hanwen@xs4all.nl>
11 #include "note-head.hh"
12 #include "note-column.hh"
13 #include "pointer-group-interface.hh"
15 #include "stream-event.hh"
18 #include "translator.icc"
20 class Cluster_spanner_engraver : public Engraver
24 TRANSLATOR_DECLARATIONS (Cluster_spanner_engraver);
25 DECLARE_TRANSLATOR_LISTENER (cluster_note);
26 DECLARE_ACKNOWLEDGER (note_column);
27 void stop_translation_timestep ();
28 virtual void process_music ();
29 virtual void finalize ();
31 vector<Stream_event*> cluster_notes_;
34 void typeset_grobs ();
36 Spanner *finished_spanner_;
39 Cluster_spanner_engraver::Cluster_spanner_engraver ()
42 finished_spanner_ = 0;
47 Cluster_spanner_engraver::finalize ()
50 finished_spanner_ = spanner_;
56 Cluster_spanner_engraver::typeset_grobs ()
58 finished_spanner_ = 0;
62 IMPLEMENT_TRANSLATOR_LISTENER (Cluster_spanner_engraver, cluster_note);
64 Cluster_spanner_engraver::listen_cluster_note (Stream_event *ev)
66 cluster_notes_.push_back (ev);
70 Cluster_spanner_engraver::process_music ()
72 if (cluster_notes_.size ())
74 SCM c0scm = get_property ("middleCPosition");
76 int c0 = scm_is_number (c0scm) ? scm_to_int (c0scm) : 0;
80 for (vsize i = 0; i < cluster_notes_.size (); i++)
82 Pitch *pit = unsmob_pitch (cluster_notes_[i]->get_property ("pitch"));
84 int p = (pit ? pit->steps () : 0) + c0;
90 beacon_ = make_item ("ClusterSpannerBeacon", cluster_notes_[0]->self_scm ());
91 beacon_->set_property ("positions",
92 scm_cons (scm_from_int (pmin),
93 scm_from_int (pmax)));
96 if (beacon_ && !spanner_)
97 spanner_ = make_spanner ("ClusterSpanner", cluster_notes_[0]->self_scm ());
99 if (beacon_ && spanner_)
101 add_bound_item (spanner_, beacon_);
102 Pointer_group_interface::add_grob (spanner_, ly_symbol2scm ("columns"), beacon_);
107 Cluster_spanner_engraver::stop_translation_timestep ()
110 cluster_notes_.clear ();
114 Cluster_spanner_engraver::acknowledge_note_column (Grob_info info)
116 if (!beacon_ && Note_column::has_interface (info.grob ()))
118 finished_spanner_ = spanner_;
123 ADD_ACKNOWLEDGER (Cluster_spanner_engraver, note_column);
124 ADD_TRANSLATOR (Cluster_spanner_engraver,
126 "Engraves a cluster using Spanner notation ",
129 "ClusterSpannerBeacon ",