2 tie-column.cc -- implement Tie_column
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
11 #include "tie-column.hh"
12 #include "group-interface.hh"
14 #include "directional-element-interface.hh"
15 #include "rhythmic-head.hh"
21 Tie_column::has_interface (Grob*me)
23 return me->has_interface (ly_symbol2scm ("tie-column-interface"));
28 tie dir depends on what Tie_column does.
32 Tie_column::add_tie (Grob*me,Grob *s)
34 if (! Pointer_group_interface ::count (me, "ties"))
36 dynamic_cast<Spanner*> (me)->set_bound (LEFT, Tie::head (s,LEFT));
37 dynamic_cast<Spanner*> (me)->set_bound (RIGHT, Tie::head (s,RIGHT));
40 Pointer_group_interface::add_grob (me, ly_symbol2scm ("ties"), s);
41 s->add_dependency (me);
46 tie_compare (Grob* const & s1,
49 return sign (Tie::position_f (s1) - Tie::position_f (s2));
56 In normal chord cases, the outer ties point outwards, and the
57 direction of the rest is determined by their staff position.
59 Ross forgets about the tie that is *on* the middle staff line. We
60 assume it goes UP. (TODO: make me settable) */
62 Tie_column::set_directions (Grob*me)
64 Link_array<Grob> ties =
65 Pointer_group_interface__extract_grobs (me, (Grob*)0, "ties");
67 for (int i = ties.size (); i--;)
68 if (Directional_element_interface::get (ties[i]))
76 Direction d = Directional_element_interface::get (me);
79 for (int i = ties.size (); i--;)
82 Directional_element_interface::set (t, d);
87 if (ties.size () == 1)
90 Directional_element_interface::set (t,Tie::get_default_dir (t));
94 ties.sort (tie_compare);
95 Directional_element_interface::set (ties[0], DOWN);
98 Directional_element_interface ::set (ties.pop (), UP);
99 for (int i=ties.size (); i--;)
102 Real p = Tie::position_f (t);
103 Direction d = (Direction) sign (p);
106 Directional_element_interface::set (t, d);
111 MAKE_SCHEME_CALLBACK (Tie_column,after_line_breaking,1);
113 Tie_column::after_line_breaking (SCM smob)
115 set_directions (unsmob_grob (smob));
116 return SCM_UNSPECIFIED;
121 ADD_INTERFACE (Tie_column,"tie-column-interface",
122 "that sets tie directions in a tied chord",