2 hara-kiri-vertical-group-spanner.cc -- implement Hara_kiri_group_spanner
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2000 Jan Nieuwenhuizen <janneke@gnu.org>
7 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "axis-group-interface.hh"
12 #include "hara-kiri-group-spanner.hh"
17 Hara_kiri_group_spanner::set_interface (Score_element*me)
19 me->add_offset_callback (force_hara_kiri_callback, Y_AXIS);
20 me->set_interface (ly_symbol2scm ("hara-kiri-spanner-interface"));
21 me->set_extent_callback (Hara_kiri_group_spanner::y_extent, Y_AXIS);
25 Hara_kiri_group_spanner::y_extent(Score_element*me, Axis a)
28 consider_suicide (me);
29 return Axis_group_interface::group_extent_callback (me, a);
34 Hara_kiri_group_spanner::has_interface (Score_element*me)
36 return me->has_interface (ly_symbol2scm ("hara-kiri-spanner-interface"));
40 Hara_kiri_group_spanner::add_interesting_item (Score_element* me,Score_element* n)
42 me->add_dependency (n);
43 Pointer_group_interface (me, "items-worth-living").add_element (n);
47 Hara_kiri_group_spanner::consider_suicide(Score_element*me)
49 SCM worth = me->get_elt_property ("items-worth-living");
50 if (gh_pair_p (worth))
53 Link_array<Score_element> childs = Axis_group_interface::get_children (me);
54 for (int i = 0; i < childs.size (); i++)
55 childs[i]->suicide ();
59 very appropriate name here :-)
67 We can't rely on offsets and dimensions of elements in a hara-kiri
68 group. Use a callback to make sure that hara-kiri has been done
69 before asking for offsets. */
71 Hara_kiri_group_spanner::force_hara_kiri_callback (Score_element *elt, Axis a)
74 consider_suicide (elt);
80 Hara_kiri_group_spanner::force_hara_kiri_in_parent_callback (Score_element*daughter, Axis a)
83 force_hara_kiri_callback (daughter->parent_l (a), Y_AXIS);
88 Hara_kiri_group_spanner::add_element (Score_element * me, Score_element *e)
90 // e->add_offset_callback (force_hara_kiri_in_parent_callback, Y_AXIS);
91 Axis_group_interface::add_element (me, e);