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"
12 #include "hara-kiri-group-spanner.hh"
15 Axis_group_interface::add_element (Grob*me,Grob *e)
17 for (SCM ax = me->get_property ("axes"); ax != SCM_EOL ; ax = scm_cdr (ax))
19 Axis a = (Axis) scm_to_int (scm_car (ax));
21 if (!e->get_parent (a))
22 e->set_parent (me, a);
25 Pointer_group_interface::add_grob (me, ly_symbol2scm ("elements"), e);
26 me->add_dependency (e);
30 Axis_group_interface::has_axis (Grob*me,Axis a)
33 urg. FIXME, check for Hara_kiri_group_spanner shouldn't be necessary?
35 return me->has_extent_callback (group_extent_callback_proc, a) ||
36 (me->has_extent_callback (Hara_kiri_group_spanner::y_extent_proc, a));
40 Axis_group_interface::relative_group_extent (Axis a, Grob *common, SCM elts)
43 for (SCM s = elts; scm_is_pair (s); s = scm_cdr (s))
45 Grob * se = unsmob_grob (scm_car (s));
46 Interval dims = se->extent (common, a);
47 if (!dims.is_empty ())
53 MAKE_SCHEME_CALLBACK (Axis_group_interface,group_extent_callback,2);
55 Axis_group_interface::group_extent_callback (SCM element_smob, SCM scm_axis)
57 Grob *me = unsmob_grob (element_smob);
58 Axis a = (Axis) scm_to_int (scm_axis);
60 SCM elts = me->get_property ("elements");
61 Grob * common = common_refpoint_of_list (elts, me, a);
63 Real my_coord = me->relative_coordinate (common, a);
64 Interval r (relative_group_extent (a, common, elts));
66 return ly_interval2scm (r - my_coord);
70 Axis_group_interface::set_axes (Grob*me,Axis a1, Axis a2)
72 SCM sa1= scm_int2num (a1);
73 SCM sa2 = scm_int2num (a2);
75 SCM axes = me->get_property ("axes");
77 if (!scm_is_pair (axes)
78 || scm_c_memq (sa1, axes) == SCM_BOOL_F
79 || scm_c_memq (sa2, axes) == SCM_BOOL_F)
81 SCM ax = scm_cons (sa1, SCM_EOL);
83 ax= scm_cons (sa2, ax);
84 me->set_property ("axes", ax);
87 if (a1 != X_AXIS && a2 != X_AXIS)
88 me->set_extent (SCM_EOL, X_AXIS);
89 if (a1 != Y_AXIS && a2 != Y_AXIS)
90 me->set_extent (SCM_EOL, Y_AXIS);
93 why so convoluted ? (fixme/documentme?)
95 if (me->has_extent_callback (Grob::stencil_extent_proc, a1))
96 me->set_extent (Axis_group_interface::group_extent_callback_proc,a1);
97 if (me->has_extent_callback (Grob::stencil_extent_proc, a2))
98 me->set_extent (Axis_group_interface::group_extent_callback_proc,a2);
102 Axis_group_interface::get_children (Grob*me)
104 Link_array<Grob> childs;
107 if (!has_interface (me))
110 for (SCM ep = me->get_property ("elements"); scm_is_pair (ep); ep = scm_cdr (ep))
112 Grob* e = unsmob_grob (scm_car (ep));
114 childs.concat (Axis_group_interface::get_children (e));
122 ADD_INTERFACE (Axis_group_interface, "axis-group-interface",
123 "An object that groups other layout objects.",