2 measure-grouping-spanner.cc -- implement Measure_grouping
4 source file of the GNU LilyPond music typesetter
6 (c) 2002--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
9 #include "measure-grouping-spanner.hh"
11 #include "output-def.hh"
15 #include "staff-symbol-referencer.hh"
17 MAKE_SCHEME_CALLBACK (Measure_grouping, print, 1);
19 Measure_grouping::print (SCM grob)
21 Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (grob));
23 SCM which = me->get_property ("style");
24 Real height = robust_scm2double (me->get_property ("height"), 1);
26 Real t = Staff_symbol_referencer::line_thickness (me) * robust_scm2double (me->get_property ("thickness"), 1);
27 Grob *common = me->get_bound (LEFT)->common_refpoint (me->get_bound (RIGHT),
30 Real right_point = robust_relative_extent (me->get_bound (RIGHT),
31 common, X_AXIS).linear_combination (CENTER);
32 Real left_point = me->get_bound (LEFT)->relative_coordinate (common, X_AXIS);
34 Interval iv (left_point, right_point);
38 TODO: use line interface
40 if (which == ly_symbol2scm ("bracket"))
41 m = Lookup::bracket (X_AXIS, iv, t, -height, t);
42 else if (which == ly_symbol2scm ("triangle"))
43 m = Lookup::triangle (iv, t, height);
45 m.align_to (Y_AXIS, DOWN);
46 m.translate_axis (- me->relative_coordinate (common, X_AXIS), X_AXIS);
47 return m.smobbed_copy ();
50 ADD_INTERFACE (Measure_grouping,
51 "This object indicates groups of beats. "
52 "Valid choices for @code{style} are @code{bracket} and @code{triangle}.",
53 "thickness style height");