2 extender-spanner.cc -- implement Extender_spanner
4 source file of the GNU LilyPond music typesetter
6 (c) 1998 Jan Nieuwenhuizen <janneke@gnu.org>
13 #include "molecule.hh"
15 #include "paper-def.hh"
16 #include "extender-spanner.hh"
17 #include "text-item.hh"
18 #include "text-def.hh"
20 Extender_spanner::Extender_spanner ()
21 : Directional_spanner ()
23 item_l_drul_[LEFT] = item_l_drul_[RIGHT] = 0;
24 dy_f_drul_[LEFT] = dy_f_drul_[RIGHT] = 0.0;
25 dx_f_drul_[LEFT] = dx_f_drul_[RIGHT] = 0.0;
28 Extender_spanner::Extender_spanner (Extender_spanner const& c)
29 : Directional_spanner (c)
31 item_l_drul_ = c.item_l_drul_;
32 dy_f_drul_ = c.dy_f_drul_;
33 dx_f_drul_ = c.dx_f_drul_;
36 Extender_spanner::~Extender_spanner ()
41 Extender_spanner::center () const
43 Real dx = extent (X_AXIS).length ();
45 return Offset (dx / 2, 0);
49 Extender_spanner::do_brew_molecule_p () const
51 Molecule* mol_p = new Molecule;
53 Real w = extent (X_AXIS).length ();
55 w += (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT]);
57 Atom a = lookup_l ()->extender (w);
59 a.translate (Offset (dx_f_drul_[LEFT], dy_f_drul_[LEFT]));
67 Extender_spanner::do_add_processing ()
70 Drul_array<Item *> new_textitem_drul = item_l_drul_;
73 new_textitem_drul[d] = item_l_drul_[(Direction)-d];
74 } while (flip(&d) != LEFT);
75 item_l_drul_ = new_textitem_drul;
79 Extender_spanner::do_height () const
81 return Interval (0,0);
85 Extender_spanner::do_post_processing ()
87 assert (item_l_drul_[LEFT] || item_l_drul_[RIGHT]);
90 Real nw_f = paper ()->note_width () * 0.8;
95 Item* t = item_l_drul_[d] ? item_l_drul_[d] : item_l_drul_[(Direction)-d];
97 dy_f_drul_[d] += t->extent (Y_AXIS).length () / 2;
99 dx_f_drul_[d] += t->extent (X_AXIS).length ();
101 dx_f_drul_[d] -= d * nw_f / 2;
103 while (flip(&d) != LEFT);
107 Extender_spanner::do_substitute_dependency (Score_element* o, Score_element* n)
109 Item* new_l = n ? dynamic_cast<Item *> (n) : 0;
110 if (dynamic_cast <Item *> (o) == item_l_drul_[LEFT])
111 item_l_drul_[LEFT] = new_l;
112 else if (dynamic_cast <Item *> (o) == item_l_drul_[RIGHT])
113 item_l_drul_[RIGHT] = new_l;
117 Extender_spanner::set_textitem (Direction d, Item* textitem_l)
119 assert (!item_l_drul_[d]);
120 item_l_drul_[d] = textitem_l;
121 set_bounds (d, textitem_l);
123 add_dependency (textitem_l);