2 measure-grouping-spanner.cc -- implement Measure_grouping
4 source file of the GNU LilyPond music typesetter
6 (c) 2002--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "measure-grouping-spanner.hh"
12 #include "output-def.hh"
16 #include "staff-symbol-referencer.hh"
18 MAKE_SCHEME_CALLBACK (Measure_grouping, print, 1);
20 Measure_grouping::print (SCM grob)
22 Spanner * me = dynamic_cast<Spanner*> (unsmob_grob (grob));
24 SCM which = me->get_property ("style");
25 Real height = robust_scm2double (me->get_property ("height"), 1);
27 Real t = Staff_symbol_referencer::line_thickness (me) * robust_scm2double (me->get_property ("thickness"), 1);
28 Grob *common = me->get_bound (LEFT)->common_refpoint (me->get_bound (RIGHT),
31 Real right_point = robust_relative_extent (me->get_bound (RIGHT),
32 common, X_AXIS).linear_combination (CENTER);
33 Real left_point = me->get_bound (LEFT)->relative_coordinate (common, X_AXIS);
37 Interval iv (left_point, right_point);
41 TODO: use line interface
43 if (which == ly_symbol2scm ("bracket"))
45 m = Lookup::bracket (X_AXIS, iv, t, -height, t);
47 else if (which == ly_symbol2scm ("triangle"))
49 m = Lookup::triangle (iv, t, height);
52 m.align_to (Y_AXIS, DOWN);
53 m.translate_axis (- me->relative_coordinate (common, X_AXIS), X_AXIS);
54 return m.smobbed_copy ();
57 ADD_INTERFACE (Measure_grouping,"measure-grouping-interface",
58 "This object indicates groups of beats. "
59 "Valid choices for @code{style} are @code{bracket} and @code{triangle}.",
60 "thickness style height");