2 axis-group-interface.cc -- implement Axis_group_interface
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "axis-group-interface.hh"
10 #include "hara-kiri-group-spanner.hh"
13 Axis_group_interface::add_element (Grob *me, Grob *e)
15 for (SCM ax = me->get_property ("axes"); ax != SCM_EOL; ax = scm_cdr (ax))
17 Axis a = (Axis) scm_to_int (scm_car (ax));
19 if (!e->get_parent (a))
20 e->set_parent (me, a);
22 e->internal_set_property ((a == X_AXIS)
23 ? ly_symbol2scm ("axis-group-parent-X")
24 : ly_symbol2scm ("axis-group-parent-Y"),
28 Pointer_group_interface::add_grob (me, ly_symbol2scm ("elements"), e);
29 me->add_dependency (e);
33 Axis_group_interface::has_axis (Grob *me, Axis a)
36 urg. FIXME, check for Hara_kiri_group_spanner shouldn't be necessary?
38 return me->has_extent_callback (group_extent_callback_proc, a)
39 || (me->has_extent_callback (Hara_kiri_group_spanner::y_extent_proc, a));
43 Axis_group_interface::relative_group_extent (Axis a, Grob *common, SCM elts)
46 for (SCM s = elts; scm_is_pair (s); s = scm_cdr (s))
48 Grob *se = unsmob_grob (scm_car (s));
49 Interval dims = se->extent (common, a);
50 if (!dims.is_empty ())
56 MAKE_SCHEME_CALLBACK (Axis_group_interface, group_extent_callback, 2);
58 Axis_group_interface::group_extent_callback (SCM element_smob, SCM scm_axis)
60 Grob *me = unsmob_grob (element_smob);
61 Axis a = (Axis) scm_to_int (scm_axis);
63 SCM elts = me->get_property ("elements");
64 Grob *common = common_refpoint_of_list (elts, me, a);
66 Real my_coord = me->relative_coordinate (common, a);
67 Interval r (relative_group_extent (a, common, elts));
69 return ly_interval2scm (r - my_coord);
73 Axis_group_interface::set_axes (Grob *me, Axis a1, Axis a2)
75 SCM sa1 = scm_int2num (a1);
76 SCM sa2 = scm_int2num (a2);
78 SCM axes = me->get_property ("axes");
80 if (!scm_is_pair (axes)
81 || scm_c_memq (sa1, axes) == SCM_BOOL_F
82 || scm_c_memq (sa2, axes) == SCM_BOOL_F)
84 SCM ax = scm_cons (sa1, SCM_EOL);
86 ax = scm_cons (sa2, ax);
87 me->set_property ("axes", ax);
90 if (a1 != X_AXIS && a2 != X_AXIS)
91 me->set_extent (SCM_EOL, X_AXIS);
92 if (a1 != Y_AXIS && a2 != Y_AXIS)
93 me->set_extent (SCM_EOL, Y_AXIS);
96 why so convoluted ? (fixme/documentme?)
98 if (me->has_extent_callback (Grob::stencil_extent_proc, a1))
99 me->set_extent_callback (Axis_group_interface::group_extent_callback_proc, a1);
100 if (me->has_extent_callback (Grob::stencil_extent_proc, a2))
101 me->set_extent_callback (Axis_group_interface::group_extent_callback_proc, a2);
105 Axis_group_interface::get_children (Grob *me)
107 Link_array<Grob> childs;
110 if (!has_interface (me))
113 for (SCM ep = me->get_property ("elements"); scm_is_pair (ep); ep = scm_cdr (ep))
115 Grob *e = unsmob_grob (scm_car (ep));
117 childs.concat (Axis_group_interface::get_children (e));
123 ADD_INTERFACE (Axis_group_interface, "axis-group-interface",
124 "An object that groups other layout objects.",