2 staff-symbol.cc -- implement Staff_symbol
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "dimensions.hh"
11 #include "paper-def.hh"
12 #include "molecule.hh"
15 #include "staff-symbol.hh"
16 #include "staff-symbol-referencer.hh"
21 MAKE_SCHEME_CALLBACK (Staff_symbol,print,1);
24 Staff_symbol::print (SCM smob)
26 Grob *me = unsmob_grob (smob);
27 Spanner* sp = dynamic_cast<Spanner*> (me);
29 = sp->get_bound (LEFT)->common_refpoint (sp->get_bound (RIGHT), X_AXIS);
34 For raggedright without ragged staffs, simply set width to the linewidth.
36 (ok -- lousy UI, since width is in staff spaces)
40 SCM width_scm = me->get_grob_property ("width");
41 if (gh_number_p (width_scm))
45 don't multiply by Staff_symbol_referencer::staff_space (me),
46 since that would make aligning staff symbols of different sizes to
47 one right margin hell.
49 width = gh_scm2double (width_scm);
53 width = sp->get_bound (RIGHT)->relative_coordinate (common , X_AXIS);
56 // respect indentation, if any
57 width -= sp->get_bound (LEFT)->relative_coordinate (common, X_AXIS);
61 warning (_f ("staff symbol: indentation yields beyond end of line"));
65 Real t = me->get_paper ()->get_realvar (ly_symbol2scm ("linethickness"));
66 t *= robust_scm2double ( me->get_grob_property("thickness"), 1.0);
68 int l = Staff_symbol::line_count (me);
70 Real height = (l-1) * staff_space (me) /2;
72 for (int i=0; i < l; i++)
75 Lookup::horizontal_line (Interval (0,width), t);
77 a.translate_axis (height - i * staff_space (me), Y_AXIS);
81 return m.smobbed_copy ();
85 Staff_symbol::get_steps (Grob*me)
87 return line_count (me) * 2;
91 Staff_symbol::line_count (Grob*me)
93 SCM c = me->get_grob_property ("line-count");
95 return gh_scm2int (c);
101 Staff_symbol::staff_space (Grob*me)
103 return robust_scm2double ( me->get_grob_property ("staff-space"), 1.0);
107 Staff_symbol::get_line_thickness (Grob* me)
109 Real lt = me->get_paper ()->get_realvar (ly_symbol2scm ("linethickness"));
111 return robust_scm2double (me->get_grob_property ("thickness"), 1.0) * lt;
115 Staff_symbol::get_ledger_line_thickness (Grob * me)
117 SCM lt_pair = me->get_grob_property ("ledger-line-thickness");
118 Offset z = robust_scm2offset (lt_pair, Offset (1.0, 0.1));
120 return z[X_AXIS] * get_line_thickness(me) + z[Y_AXIS]* staff_space (me);
124 ADD_INTERFACE (Staff_symbol,"staff-symbol-interface",
125 "This spanner draws the lines of a staff. The center (i.e. middle line "
126 "or space) is position 0. The length of the symbol may be set by hand "
127 "through the @code{width} property. ",
129 "ledger-line-thickness width staff-space thickness line-count");