2 chord-tremolo-engraver.cc -- implement Chord_tremolo_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
7 Jan Nieuwenhuizen <janneke@gnu.org>
10 #include "timing-translator.hh"
11 #include "chord-tremolo-engraver.hh"
14 #include "musical-request.hh"
17 #include "score-engraver.hh"
19 ADD_THIS_TRANSLATOR (Chord_tremolo_engraver);
21 Chord_tremolo_engraver::Chord_tremolo_engraver ()
23 reqs_drul_[LEFT] = reqs_drul_[RIGHT] = 0;
25 finished_abeam_p_ = 0;
30 Chord_tremolo_engraver::do_try_music (Music* m)
32 if (Chord_tremolo_req* b = dynamic_cast <Chord_tremolo_req *> (m))
34 Direction d = b->span_dir_;
35 if (reqs_drul_[d] && !reqs_drul_[d]->equal_b (b))
38 if ((d == STOP) && !abeam_p_)
40 m->warning (_ ("no tremolo beam to end"));
52 Chord_tremolo_engraver::do_process_requests ()
57 reqs_drul_[STOP]->warning (_ ("no tremolo beam to end"));
59 finished_abeam_p_ = abeam_p_;
65 Score_engraver * e = 0;
66 Translator * t = daddy_grav_l ();
67 for (; !e && t; t = t->daddy_trans_l_)
69 e = dynamic_cast<Score_engraver*> (t);
73 programming_error ("No score engraver!");
78 if (reqs_drul_[START])
82 reqs_drul_[START]->warning (_ ("Already have a tremolo beam"));
86 prev_start_req_ = reqs_drul_[START];
89 abeam_p_->set_elt_property ("chord-tremolo", SCM_BOOL_T);
91 announce_element (Score_element_info (abeam_p_, reqs_drul_[LEFT]));
96 Chord_tremolo_engraver::do_post_move_processing ()
98 reqs_drul_ [START] = 0;
102 Chord_tremolo_engraver::do_pre_move_processing ()
108 Chord_tremolo_engraver::typeset_beam ()
110 if (finished_abeam_p_)
112 typeset_element (finished_abeam_p_);
113 finished_abeam_p_ = 0;
115 reqs_drul_[STOP] = 0;
120 Chord_tremolo_engraver::do_removal_processing ()
125 prev_start_req_->warning (_ ("unfinished tremolo beam"));
126 finished_abeam_p_ = abeam_p_;
132 Chord_tremolo_engraver::acknowledge_element (Score_element_info i)
136 if (Stem* s = dynamic_cast<Stem *> (i.elem_l_))
138 int type_i = prev_start_req_->type_i_;
139 s->set_elt_property ("duration-log", gh_int2scm (intlog2 (type_i) - 2));
141 s->set_beaming (s->flag_i (), LEFT);
142 s->set_beaming ( s->flag_i (), RIGHT);
146 if (s->type_i () != 1)
148 int gap_i =s->flag_i () - ((s->type_i () >? 2) - 2);
149 s->set_elt_property ("beam-gap", gh_int2scm(gap_i));
152 if (s->type_i () != 1)
154 int gap_i =s->flag_i () - ((s->type_i () >? 2) - 2);
155 abeam_p_->set_elt_property ("beam-gap", gh_int2scm(gap_i));
159 abeam_p_->add_stem (s);