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_engraver : public Engraver
20 TRANSLATOR_DECLARATIONS(Cluster_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 ();
27 Drul_array<Music*> reqs_drul_;
32 Cluster_engraver::Cluster_engraver ()
35 reqs_drul_[LEFT] = reqs_drul_[RIGHT] = 0;
39 Cluster_engraver::try_music (Music *m)
41 if (m->is_mus_type ("abort-event"))
43 reqs_drul_[START] = 0;
51 else if (m->is_mus_type ("cluster-event"))
53 Direction d = to_dir (m->get_mus_property ("span-direction"));
62 Cluster_engraver::process_music ()
68 reqs_drul_[STOP]->origin ()->warning ("can't find start of cluster");
72 Grob *bound = unsmob_grob (get_property ("currentMusicalColumn"));
73 cluster_->set_bound (RIGHT, bound);
76 if (reqs_drul_[START])
80 reqs_drul_[START]->origin ()->warning ("may not nest clusters");
84 cluster_ = new Spanner (get_property ("Cluster"));
85 Grob *bound = unsmob_grob (get_property ("currentMusicalColumn"));
86 cluster_->set_bound (LEFT, bound);
87 announce_grob (cluster_, reqs_drul_[START]->self_scm ());
89 reqs_drul_[START] = 0;
95 Cluster_engraver::stop_translation_timestep ()
100 typeset_grob (cluster_);
106 Cluster_engraver::acknowledge_grob (Grob_info info)
108 if (cluster_ && Note_column::has_interface (info.grob_))
110 Pointer_group_interface::add_grob (cluster_, ly_symbol2scm ("columns"), info.grob_);
114 ENTER_DESCRIPTION(Cluster_engraver,
115 /* descr */ "engraves a cluster",
116 /* creats*/ "Cluster",
117 /* accepts */ "cluster-event",
118 /* acks */ "note-column-interface",