2 extender-spanner.cc -- implement Extender_spanner
4 source file of the GNU LilyPond music typesetter
6 (c) 1998, 1999 Jan Nieuwenhuizen <janneke@gnu.org>
13 #include "molecule.hh"
15 #include "paper-def.hh"
16 #include "extender-spanner.hh"
18 Extender_spanner::Extender_spanner ()
19 : Directional_spanner ()
21 item_l_drul_[LEFT] = item_l_drul_[RIGHT] = 0;
22 dy_f_drul_[LEFT] = dy_f_drul_[RIGHT] = 0.0;
23 dx_f_drul_[LEFT] = dx_f_drul_[RIGHT] = 0.0;
26 Extender_spanner::Extender_spanner (Extender_spanner const& c)
27 : Directional_spanner (c)
29 item_l_drul_ = c.item_l_drul_;
30 dy_f_drul_ = c.dy_f_drul_;
31 dx_f_drul_ = c.dx_f_drul_;
34 Extender_spanner::~Extender_spanner ()
39 Extender_spanner::center () const
41 Real dx = extent (X_AXIS).length ();
43 return Offset (dx / 2, 0);
47 Extender_spanner::do_brew_molecule_p () const
49 Molecule* mol_p = new Molecule;
51 Real w = extent (X_AXIS).length ();
53 w += (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT]);
54 Real h = paper ()->get_realvar (ly_symbol ("extender_height"));
55 Molecule a = lookup_l ()->filledbox ( Box (Interval (0,w), Interval (0,h)));
56 a.translate (Offset (dx_f_drul_[LEFT], dy_f_drul_[LEFT]));
58 mol_p->add_molecule (a);
64 Extender_spanner::do_add_processing ()
67 Drul_array<Item *> new_textitem_drul = item_l_drul_;
70 new_textitem_drul[d] = item_l_drul_[(Direction)-d];
71 } while (flip(&d) != LEFT);
72 item_l_drul_ = new_textitem_drul;
76 Extender_spanner::do_height () const
78 return Interval (0,0);
82 Extender_spanner::do_post_processing ()
84 assert (item_l_drul_[LEFT] || item_l_drul_[RIGHT]);
87 Real nw_f = paper ()->note_width () * 0.8;
92 Item* t = item_l_drul_[d]
93 ? item_l_drul_[d] : item_l_drul_[(Direction)-d];
95 dx_f_drul_[d] += t->extent (X_AXIS).length ();
97 dx_f_drul_[d] -= d * nw_f / 2;
99 while (flip(&d) != LEFT);
103 Extender_spanner::do_substitute_dependency (Score_element* o, Score_element* n)
105 Item* new_l = n ? dynamic_cast<Item *> (n) : 0;
106 if (dynamic_cast <Item *> (o) == item_l_drul_[LEFT])
107 item_l_drul_[LEFT] = new_l;
108 else if (dynamic_cast <Item *> (o) == item_l_drul_[RIGHT])
109 item_l_drul_[RIGHT] = new_l;
113 Extender_spanner::set_textitem (Direction d, Item* textitem_l)
115 assert (!item_l_drul_[d]);
116 item_l_drul_[d] = textitem_l;
117 set_bounds (d, textitem_l);
119 add_dependency (textitem_l);