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"
18 Hara_kiri_group_spanner::y_extent(Score_element*me, Axis a)
21 consider_suicide (me);
22 return Axis_group_interface::group_extent_callback (me, a);
27 Hara_kiri_group_spanner::has_interface (Score_element*me)
29 return me->has_interface (ly_symbol2scm ("hara-kiri-spanner-interface"));
33 Hara_kiri_group_spanner::add_interesting_item (Score_element* me,Score_element* n)
35 me->add_dependency (n);
36 Pointer_group_interface (me, "items-worth-living").add_element (n);
40 Hara_kiri_group_spanner::consider_suicide(Score_element*me)
42 SCM worth = me->get_elt_property ("items-worth-living");
43 if (gh_pair_p (worth))
46 Link_array<Score_element> childs = Axis_group_interface::get_children (me);
47 for (int i = 0; i < childs.size (); i++)
48 childs[i]->suicide ();
52 very appropriate name here :-)
60 We can't rely on offsets and dimensions of elements in a hara-kiri
61 group. Use a callback to make sure that hara-kiri has been done
62 before asking for offsets. */
63 MAKE_SCHEME_CALLBACK(Hara_kiri_group_spanner,force_hara_kiri_callback,2);
65 Hara_kiri_group_spanner::force_hara_kiri_callback (SCM element_smob, SCM axis)
67 Score_element *me = unsmob_element (element_smob);
68 Axis a = (Axis) gh_scm2int (axis);
70 consider_suicide (me);
71 return gh_double2scm (0.0);
75 MAKE_SCHEME_CALLBACK(Hara_kiri_group_spanner,force_hara_kiri_in_parent_callback,2);
77 Hara_kiri_group_spanner::force_hara_kiri_in_parent_callback (SCM element_smob, SCM axis)
79 Score_element *daughter = unsmob_element (element_smob);
80 Axis a = (Axis) gh_scm2int (axis);
82 force_hara_kiri_callback (daughter->parent_l (a)->self_scm (), Y_AXIS);
83 return gh_double2scm ( 0.0);
87 Hara_kiri_group_spanner::add_element (Score_element * me, Score_element *e)
89 // e->add_offset_callback (force_hara_kiri_in_parent_callback, Y_AXIS);
90 Axis_group_interface::add_element (me, e);
95 Hara_kiri_group_spanner::set_interface (Score_element*me)
97 me->add_offset_callback (Hara_kiri_group_spanner_force_hara_kiri_callback_proc, Y_AXIS);
98 me->set_interface (ly_symbol2scm ("hara-kiri-spanner-interface"));
99 me->set_extent_callback (Hara_kiri_group_spanner::y_extent, Y_AXIS);