2 abbrev.cc -- implement Stem_tremolo
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "stem-tremolo.hh"
13 #include "paper-def.hh"
17 #include "dimension-cache.hh"
18 #include "staff-symbol-referencer.hh"
19 #include "directional-element-interface.hh"
21 Stem_tremolo::Stem_tremolo ()
23 set_elt_property ("stem", SCM_EOL);
28 Stem_tremolo::stem_l ()const
30 SCM s = get_elt_property ("stem");
32 return dynamic_cast<Stem*> ( unsmob_element (s));
36 Stem_tremolo::dim_callback (Dimension_cache const *c)
38 Stem_tremolo * s = dynamic_cast<Stem_tremolo*> (c->element_l ());
39 Real space = Staff_symbol_referencer_interface (s->stem_l ())
41 return Interval (-space, space);
46 Stem_tremolo::do_brew_molecule_p () const
48 Stem * st = stem_l ();
50 if (Beam * b = st->beam_l ())
52 mult = b->get_multiplicity ();
55 Real interbeam_f = paper_l ()->interbeam_f (mult);
56 Real w = gh_scm2double (get_elt_property ("beam-width"));
57 Real space = Staff_symbol_referencer_interface (st).staff_space ();
58 Real half_staff_space = space / 2;
59 Real beam_f = gh_scm2double (get_elt_property ("beam-thickness"));
64 if (st && st->beam_l ())
67 SCM s = st->beam_l ()->get_elt_property ("height");
69 dy = gh_scm2double (s);
70 Real dx = st->beam_l ()->last_visible_stem ()->hpos_f ()
71 - st->beam_l ()->first_visible_stem ()->hpos_f ();
74 // ugh, rather calc from Stem_tremolo_req
75 beams_i = st->beam_count(RIGHT) >? st->beam_count (LEFT);
78 Molecule a (lookup_l ()->beam (dydx, w, beam_f));
79 a.translate (Offset (-w/2, w / 2 * dydx));
83 SCM a = get_elt_property ("abbrev-flags");
85 abbrev_flags = gh_scm2int (a);
88 Molecule *beams= new Molecule;
89 for (int i = 0; i < abbrev_flags; i++)
92 b.translate_axis (interbeam_f * i, Y_AXIS);
93 beams->add_molecule (b);
95 beams->translate_axis (-beams->extent ()[Y_AXIS].center (), Y_AXIS);
101 beams->translate (Offset(st->hpos_f () - hpos_f (),
102 st->stem_end_position () * half_staff_space -
103 directional_element (st->beam_l ()).get () * beams_i * interbeam_f));
108 Beams should intersect one beamthickness below staff end
110 Real dy = - beams->extent ()[Y_AXIS].length () / 2 * st->get_direction ();
113 uhg. Should use relative coords and placement
115 Real whole_note_correction = (st && st->invisible_b( ))
116 ? -st->get_direction () * st->note_delta_f ()/2
119 dy += st->stem_end_position ();
120 beams->translate (Offset(st->hpos_f () - hpos_f ()+
121 whole_note_correction, dy));
125 there used to be half a page of code that was long commented out.
135 Stem_tremolo::set_stem (Stem *s)
137 set_elt_property ("stem", s->self_scm_);