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1 /* | |
2 grid-line-interface.cc -- implement Grid_line_interface | |
3 | |
4 source file of the GNU LilyPond music typesetter | |
5 | |
6 (c) 2005--2009 Han-Wen Nienhuys <hanwen@xs4all.nl> | |
7 */ | |
8 | |
9 #include "grid-line-interface.hh" | |
10 | |
11 #include "grob.hh" | |
12 #include "pointer-group-interface.hh" | |
13 #include "lookup.hh" | |
14 #include "output-def.hh" | |
15 | |
16 MAKE_SCHEME_CALLBACK (Grid_line_interface, print, 1); | |
17 SCM | |
18 Grid_line_interface::print (SCM smobbed_me) | |
19 { | |
20 Grob *me = unsmob_grob (smobbed_me); | |
21 | |
22 extract_grob_set (me, "elements", elts); | |
23 /* compute common refpoint of elements */ | |
24 Grob *refp = common_refpoint_of_array (elts, me, Y_AXIS); | |
25 Interval iv; | |
26 | |
27 for (vsize i = 0; i < elts.size (); i++) | |
28 { | |
29 Grob *point = elts[i]; | |
30 | |
31 iv.unite (point->extent (refp, Y_AXIS)); | |
32 } | |
33 | |
34 if (iv.is_empty ()) | |
35 { | |
36 me->suicide (); | |
37 return SCM_EOL; | |
38 } | |
39 | |
40 Real staffline = me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"
)); | |
41 Real thick = robust_scm2double (me->get_property ("thickness"), 1.0) | |
42 * staffline; | |
43 | |
44 iv += -me->relative_coordinate (refp, Y_AXIS); | |
45 Stencil st = Lookup::filled_box (Box (Interval (0, thick), | |
46 iv)); | |
47 | |
48 return st.smobbed_copy (); | |
49 } | |
50 | |
51 MAKE_SCHEME_CALLBACK (Grid_line_interface, width, 1); | |
52 SCM | |
53 Grid_line_interface::width (SCM smob) | |
54 { | |
55 Grob *me = unsmob_grob (smob); | |
56 | |
57 Real staffline = me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"
)); | |
58 Real thick = robust_scm2double (me->get_property ("thickness"), 1.0) | |
59 * staffline; | |
60 | |
61 return ly_interval2scm (Interval (0, thick)); | |
62 } | |
63 | |
64 void | |
65 Grid_line_interface::add_grid_point (Grob *me, Grob *b) | |
66 { | |
67 Pointer_group_interface::add_grob (me, ly_symbol2scm ("elements"), b); | |
68 } | |
69 | |
70 ADD_INTERFACE (Grid_line_interface, | |
71 "A line that is spanned between grid-points.", | |
72 | |
73 /* properties */ | |
74 "elements " | |
75 "thickness " | |
76 ); | |
77 | |
78 ADD_INTERFACE (Grid_point_interface, | |
79 "A spanning point for grid lines.", | |
80 | |
81 /* properties */ | |
82 "" | |
83 ); | |
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