2 extender-spanner.cc -- implement Extender_spanner
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2000 Jan Nieuwenhuizen <janneke@gnu.org>
10 TODO: too complicated implementation. Why the dx_drul?.
14 #include "dimension-cache.hh"
18 #include "molecule.hh"
19 #include "paper-column.hh"
20 #include "paper-def.hh"
21 #include "extender-spanner.hh"
23 Extender_spanner::Extender_spanner ()
26 dx_f_drul_[LEFT] = dx_f_drul_[RIGHT] = 0.0;
27 dim_cache_[Y_AXIS]->set_extent_callback (Dimension_cache::point_dimension_callback);
34 Extender_spanner::do_brew_molecule () const
38 Real w = spanner_length ();
40 w += (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT]);
41 Real h = paper_l ()->get_var ("extender_height");
42 Molecule a = lookup_l ()->filledbox ( Box (Interval (0,w), Interval (0,h)));
43 a.translate (Offset (dx_f_drul_[LEFT], 0));
53 Extender_spanner::after_line_breaking ()
56 Real gap = paper_l ()->get_var ("interline");
61 Item* t = get_bound (d)
62 ? get_bound (d) : get_bound ((Direction)-d);
64 dx_f_drul_[d] += t->extent (X_AXIS).length ();
66 dx_f_drul_[d] -= d * gap / 2;
68 while (flip(&d) != LEFT);
73 Extender_spanner::set_textitem (Direction d, Item* textitem_l)
75 set_bound (d, textitem_l);
76 add_dependency (textitem_l);