2 cluster-engraver.cc -- implement Cluster_engraver
4 (c) 2002--2006 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"
17 #include "translator.icc"
19 class Cluster_spanner_engraver : public Engraver
23 TRANSLATOR_DECLARATIONS (Cluster_spanner_engraver);
24 DECLARE_TRANSLATOR_LISTENER (cluster_note);
25 DECLARE_ACKNOWLEDGER (note_column);
26 void stop_translation_timestep ();
27 virtual void process_music ();
28 virtual void finalize ();
30 vector<Stream_event*> cluster_notes_;
33 void typeset_grobs ();
35 Spanner *finished_spanner_;
38 Cluster_spanner_engraver::Cluster_spanner_engraver ()
41 finished_spanner_ = 0;
46 Cluster_spanner_engraver::finalize ()
49 finished_spanner_ = spanner_;
55 Cluster_spanner_engraver::typeset_grobs ()
57 finished_spanner_ = 0;
61 IMPLEMENT_TRANSLATOR_LISTENER (Cluster_spanner_engraver, cluster_note);
63 Cluster_spanner_engraver::listen_cluster_note (Stream_event *ev)
65 cluster_notes_.push_back (ev);
69 Cluster_spanner_engraver::process_music ()
71 if (cluster_notes_.size ())
73 SCM c0scm = get_property ("middleCPosition");
75 int c0 = scm_is_number (c0scm) ? scm_to_int (c0scm) : 0;
79 for (vsize i = 0; i < cluster_notes_.size (); i++)
81 Pitch *pit = unsmob_pitch (cluster_notes_[i]->get_property ("pitch"));
83 int p = (pit ? pit->steps () : 0) + c0;
89 beacon_ = make_item ("ClusterSpannerBeacon", cluster_notes_[0]->self_scm ());
90 beacon_->set_property ("positions",
91 scm_cons (scm_from_int (pmin),
92 scm_from_int (pmax)));
95 if (beacon_ && !spanner_)
96 spanner_ = make_spanner ("ClusterSpanner", cluster_notes_[0]->self_scm ());
98 if (beacon_ && spanner_)
100 add_bound_item (spanner_, beacon_);
101 Pointer_group_interface::add_grob (spanner_, ly_symbol2scm ("columns"), beacon_);
106 Cluster_spanner_engraver::stop_translation_timestep ()
109 cluster_notes_.clear ();
113 Cluster_spanner_engraver::acknowledge_note_column (Grob_info info)
115 if (!beacon_ && Note_column::has_interface (info.grob ()))
117 finished_spanner_ = spanner_;
122 ADD_ACKNOWLEDGER (Cluster_spanner_engraver, note_column);
123 ADD_TRANSLATOR (Cluster_spanner_engraver,
124 /* doc */ "Engraves a cluster using Spanner notation ",
125 /* create */ "ClusterSpanner ClusterSpannerBeacon",
126 /* accept */ "cluster-note-event",