2 axis-group-interface.cc -- implement Axis_group_interface
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "axis-group-interface.hh"
11 #include "hara-kiri-group-spanner.hh"
14 Axis_group_interface::add_element (Grob*me,Grob *e)
16 for (SCM ax = me->get_property ("axes"); ax != SCM_EOL ; ax = scm_cdr (ax))
18 Axis a = (Axis) scm_to_int (scm_car (ax));
20 if (!e->get_parent (a))
21 e->set_parent (me, a);
23 e->internal_set_property ((a == X_AXIS)
24 ? ly_symbol2scm ("axis-group-parent-X")
25 : ly_symbol2scm ("axis-group-parent-Y"),
30 Pointer_group_interface::add_grob (me, ly_symbol2scm ("elements"), e);
31 me->add_dependency (e);
35 Axis_group_interface::has_axis (Grob*me,Axis a)
38 urg. FIXME, check for Hara_kiri_group_spanner shouldn't be necessary?
40 return me->has_extent_callback (group_extent_callback_proc, a) ||
41 (me->has_extent_callback (Hara_kiri_group_spanner::y_extent_proc, a));
45 Axis_group_interface::relative_group_extent (Axis a, Grob *common, SCM elts)
48 for (SCM s = elts; scm_is_pair (s); s = scm_cdr (s))
50 Grob * se = unsmob_grob (scm_car (s));
51 Interval dims = se->extent (common, a);
52 if (!dims.is_empty ())
58 MAKE_SCHEME_CALLBACK (Axis_group_interface,group_extent_callback,2);
60 Axis_group_interface::group_extent_callback (SCM element_smob, SCM scm_axis)
62 Grob *me = unsmob_grob (element_smob);
63 Axis a = (Axis) scm_to_int (scm_axis);
65 SCM elts = me->get_property ("elements");
66 Grob * common = common_refpoint_of_list (elts, me, a);
68 Real my_coord = me->relative_coordinate (common, a);
69 Interval r (relative_group_extent (a, common, elts));
71 return ly_interval2scm (r - my_coord);
75 Axis_group_interface::set_axes (Grob*me,Axis a1, Axis a2)
77 SCM sa1= scm_int2num (a1);
78 SCM sa2 = scm_int2num (a2);
80 SCM axes = me->get_property ("axes");
82 if (!scm_is_pair (axes)
83 || scm_c_memq (sa1, axes) == SCM_BOOL_F
84 || scm_c_memq (sa2, axes) == SCM_BOOL_F)
86 SCM ax = scm_cons (sa1, SCM_EOL);
88 ax = scm_cons (sa2, ax);
89 me->set_property ("axes", ax);
92 if (a1 != X_AXIS && a2 != X_AXIS)
93 me->set_extent (SCM_EOL, X_AXIS);
94 if (a1 != Y_AXIS && a2 != Y_AXIS)
95 me->set_extent (SCM_EOL, Y_AXIS);
98 why so convoluted ? (fixme/documentme?)
100 if (me->has_extent_callback (Grob::stencil_extent_proc, a1))
101 me->set_extent (Axis_group_interface::group_extent_callback_proc,a1);
102 if (me->has_extent_callback (Grob::stencil_extent_proc, a2))
103 me->set_extent (Axis_group_interface::group_extent_callback_proc,a2);
107 Axis_group_interface::get_children (Grob*me)
109 Link_array<Grob> childs;
112 if (!has_interface (me))
115 for (SCM ep = me->get_property ("elements"); scm_is_pair (ep); ep = scm_cdr (ep))
117 Grob* e = unsmob_grob (scm_car (ep));
119 childs.concat (Axis_group_interface::get_children (e));
127 ADD_INTERFACE (Axis_group_interface, "axis-group-interface",
128 "An object that groups other layout objects.",