2 time-signature.cc -- implement Time_signature
4 source file of the GNU LilyPond music typesetter
6 (c) 1996--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
11 #include "molecule.hh"
12 #include "text-item.hh"
13 #include "time-signature.hh"
14 #include "paper-def.hh"
15 #include "font-interface.hh"
17 #include "staff-symbol-referencer.hh"
19 MAKE_SCHEME_CALLBACK (Time_signature,brew_molecule,1);
21 TODO: make different functions for special and normal timesigs.
24 Time_signature::brew_molecule (SCM smob)
26 Grob * me = unsmob_grob (smob);
27 SCM st = me->get_grob_property ("style");
28 SCM frac = me->get_grob_property ("fraction");
33 n = gh_scm2int (ly_car (frac));
34 d = gh_scm2int (ly_cdr (frac));
40 String style (ly_scm2string (scm_symbol_to_string (st)));
43 m = numbered_time_signature (me, n, 0);
47 m = special_time_signature (me, st, n, d);
51 m = numbered_time_signature (me, n,d);
53 if (Staff_symbol_referencer::line_count (me) % 2 == 0)
54 m.translate_axis (Staff_symbol_referencer::staff_space (me)/2 , Y_AXIS);
56 return m.smobbed_copy ();
60 Time_signature::special_time_signature (Grob *me, SCM scm_style, int n, int d)
62 String style = ly_scm2string (scm_symbol_to_string (scm_style));
64 if (style == "numbered")
65 return numbered_time_signature (me, n, d);
67 if ((style == "default") || (style == ""))
68 style = to_string ("C");
72 if /* neither C2/2 nor C4/4 */
73 (((n != 2) || (d != 2)) &&
74 ((n != 4) || (d != 4)))
76 return numbered_time_signature (me, n, d);
80 String char_name = style + to_string (n) + "/" + to_string (d);
81 me->set_grob_property ("font-family", ly_symbol2scm ("music"));
83 Font_interface::get_default_font (me)->find_by_name ("timesig-" + char_name);
88 If there is no such symbol, we default to the numbered style.
89 (Here really with a warning!)
91 me->warning (_f ("time signature symbol `%s' not found; "
92 "reverting to numbered style", char_name));
93 return numbered_time_signature (me, n, d);
97 Time_signature::numbered_time_signature (Grob*me,int num, int den)
99 SCM chain = Font_interface::font_alist_chain (me);
100 me->set_grob_property("font-family", ly_symbol2scm ("number"));
102 Molecule n = Text_item::text2molecule (me,
103 scm_makfrom0str (to_string (num).to_str0 ()),
105 Molecule d = Text_item::text2molecule (me,
106 scm_makfrom0str (to_string (den).to_str0 ()),
108 n.align_to (X_AXIS, CENTER);
109 d.align_to (X_AXIS, CENTER);
113 m.add_at_edge (Y_AXIS, UP, n, 0.0);
114 m.add_at_edge (Y_AXIS, DOWN, d, 0.0);
119 m.align_to (Y_AXIS, CENTER);
122 m.align_to (X_AXIS, LEFT);
127 ADD_INTERFACE (Time_signature,"time-signature-interface",
128 "A time signature, in different styles.
129 The following values for 'style are are recognized:
133 4/4 and 2/2 are typeset as C and struck C, respectively. All
134 other time signatures are written with two digits.
136 @item @code{neo_mensural}
137 2/2, 3/2, 2/4, 3/4, 4/4, 6/4, 9/4, 4/8, 6/8 and 9/8 are
138 typeset with neo-mensural style mensuration marks. All other time
139 signatures are written with two digits.
141 @item @code{mensural}
142 2/2, 3/2, 2/4, 3/4, 4/4, 6/4, 9/4, 4/8, 6/8 and 9/8 are
143 typeset with mensural style mensuration marks. All other time
144 signatures are written with two digits.
147 All time signatures are typeset with a single
148 digit, e.g. 3/2 is written as 3. (Any symbol starting
149 with the digit @code{1} will do.)
152 See also the test-file @file{input/test/time.ly}.