2 beam-engraver.cc -- implement Beam_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "beam-engraver.hh"
11 #include "musical-request.hh"
13 #include "grouping.hh"
16 #include "time-description.hh"
18 Beam_engraver::Beam_engraver ()
22 finished_grouping_p_ = 0;
24 reqs_drul_[LEFT] = reqs_drul_[RIGHT] =0;
28 Beam_engraver::do_try_music (Music *m)
30 if (Beam_req * c = dynamic_cast<Beam_req*>(m))
32 Direction d =c->spantype_;
35 Perhaps not print warnings ?
37 if (d == START && beam_p_)
39 m->warning ("Already have a Beam");
42 if (d == STOP && !beam_p_)
44 m->warning ("No Beam to end");
55 Beam_engraver::do_process_requests ()
60 reqs_drul_[STOP]->warning (_("No beam to stop"));
61 finished_beam_p_ = beam_p_;
62 finished_grouping_p_ = grouping_p_;
68 if (reqs_drul_[START])
71 grouping_p_ = new Rhythmic_grouping;
73 Scalar prop = get_property ("beamslopedamping", 0);
75 beam_p_->damping_i_ = prop;
77 prop = get_property ("beamquantisation", 0);
79 beam_p_->quantisation_ = (Beam::Quantisation)(int)prop;
81 // must set minVerticalAlign == maxVerticalAlign to get sane results
82 // see input/test/beam-interstaff.ly
83 prop = get_property ("minVerticalAlign", 0);
85 beam_p_->vertical_align_drul_[MIN] = prop;
87 prop = get_property ("maxVerticalAlign", 0);
89 beam_p_->vertical_align_drul_[MAX] = prop;
91 announce_element (Score_element_info (beam_p_, reqs_drul_[START]));
96 Beam_engraver::typeset_beam ()
100 Rhythmic_grouping const * rg_C = get_staff_info().rhythmic_C_;
101 rg_C->extend (finished_grouping_p_->interval());
102 finished_beam_p_->set_grouping (*rg_C, *finished_grouping_p_);
103 typeset_element (finished_beam_p_);
104 finished_beam_p_ = 0;
106 delete finished_grouping_p_;
107 finished_grouping_p_= 0;
109 reqs_drul_[STOP] = 0;
114 Beam_engraver::do_post_move_processing ()
116 reqs_drul_ [START] =0;
120 Beam_engraver::do_pre_move_processing ()
126 Beam_engraver::do_removal_processing ()
131 warning ("Unfinished beam");
132 finished_beam_p_ = beam_p_;
133 finished_grouping_p_ = grouping_p_;
139 Beam_engraver::acknowledge_element (Score_element_info info)
143 Stem* stem_l = dynamic_cast<Stem *> (info.elem_l_);
148 Rhythmic_req *rhythmic_req = dynamic_cast <Rhythmic_req *> (info.req_l_);
151 String s=_("Stem must have Rhythmic structure.");
153 info.req_l_->warning(s);
161 if (rhythmic_req->duration_.durlog_i_<= 2)
163 rhythmic_req->warning (_ ("stem doesn't fit in beam"));
164 reqs_drul_[LEFT]->warning (_("beam was started here"));
169 TODO: do something sensible if it doesn't fit in the beam.
171 Moment start = get_staff_info().time_C_->whole_in_measure_;
173 if (!grouping_p_->child_fit_b (start))
175 String s (_("please fix me") + ": "
176 + _f ("stem at %s doesn't fit in beam", now_moment ().str ()));
179 info.req_l_->warning(s);
185 grouping_p_->add_child (start, rhythmic_req->duration ());
186 stem_l->flag_i_ = rhythmic_req->duration_.durlog_i_;
187 beam_p_->add_stem (stem_l);
194 ADD_THIS_TRANSLATOR(Beam_engraver);