2 staff-symbol.cc -- implement Staff_symbol
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2002 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,brew_molecule,1);
24 Staff_symbol::brew_molecule (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);
31 bool paper_raggedright = to_boolean (me->paper_l ()->get_scmvar ("raggedright"));
32 bool grob_raggedright = to_boolean (me->get_grob_property ("ragged-right"));
35 SCM width_scm = me->get_grob_property ("width");
36 if (gh_number_p (width_scm)) // user-defined width
38 width = gh_scm2double (width_scm) *
39 Staff_symbol_referencer::staff_space (me);
41 else // determine width automatically
43 if (paper_raggedright && !grob_raggedright)
45 // *prevent* staff symbol from being ragged right; instead, use
46 // paper variable "linewidth"
47 width = me->paper_l ()->get_var ("linewidth");
49 else // determine width from my own bounds
51 width = sp->get_bound (RIGHT)->relative_coordinate (common , X_AXIS);
55 // respect indentation, if any
56 width -= sp->get_bound (LEFT)->relative_coordinate (common, X_AXIS);
60 warning (_f ("staff symbol: indentation yields beyond end of line"));
64 Real t = me->paper_l ()->get_var ("linethickness");
65 SCM my_thick = me->get_grob_property("thickness");
66 if (gh_number_p(my_thick))
67 t *= gh_scm2double (my_thick);
69 int l = Staff_symbol::line_count (me);
71 Real height = (l-1) * staff_space (me) /2;
73 for (int i=0; i < l; i++)
76 Lookup::filledbox (Box (Interval (0,width),
77 Interval (-t/2, t/2)));
79 a.translate_axis (height - i * staff_space (me), Y_AXIS);
83 return m.smobbed_copy ();
87 Staff_symbol::steps_i (Grob*me)
89 return line_count (me) * 2;
93 Staff_symbol::line_count (Grob*me)
95 SCM c = me->get_grob_property ("line-count");
97 return gh_scm2int (c);
103 Staff_symbol::staff_space (Grob*me)
107 SCM s = me->get_grob_property ("staff-space");
109 ss *= gh_scm2double (s);
116 ADD_INTERFACE (Staff_symbol,"staff-symbol-interface",
117 "This spanner draws the lines of a staff. The center (i.e. middle line
118 or space) is position 0.",
120 "ragged-right staff-space thickness line-count");