2 horizontal-bracket.cc -- implement Horizontal_bracket
4 source file of the GNU LilyPond music typesetter
6 (c) 2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "side-position-interface.hh"
12 #include "group-interface.hh"
13 #include "directional-element-interface.hh"
14 #include "paper-def.hh"
16 struct Horizontal_bracket
18 DECLARE_SCHEME_CALLBACK (brew_molecule, (SCM));
19 static bool has_interface (Grob*);
26 This doesn't look very elegant: should support winged edges.
28 Support texts on the brackets?
32 MAKE_SCHEME_CALLBACK(Horizontal_bracket, brew_molecule, 1);
35 Horizontal_bracket::brew_molecule (SCM smob)
37 Grob * me = unsmob_grob (smob);
38 Spanner *sp = dynamic_cast<Spanner*> (me);
39 Link_array<Grob> gs = Pointer_group_interface__extract_grobs (me,(Grob*)0, "columns");
46 Grob * cx = common_refpoint_of_array (gs, me, X_AXIS);
47 cx = cx->common_refpoint (sp->get_bound (LEFT), X_AXIS);
48 cx = cx->common_refpoint (sp->get_bound (RIGHT),X_AXIS);
50 Interval ext = gs.top()->extent (cx, X_AXIS);
51 ext.unite (gs[0]->extent (cx, X_AXIS));
53 Direction d = Directional_element_interface::get (me);
54 Real t = me->get_paper()->get_var ("linethickness");
56 SCM lthick = me->get_grob_property ("thickness");
57 if (gh_number_p (lthick))
58 t *= gh_scm2double (lthick);
60 Molecule b = Lookup::bracket (X_AXIS, ext, t, - d* 1.0);
62 b.translate_axis ( - sp->get_bound (LEFT)->relative_coordinate (cx, X_AXIS), X_AXIS);
64 return b.smobbed_copy();
67 ADD_INTERFACE (Horizontal_bracket,"horizontal-bracket-interface",
68 "A horizontal bracket encompassing notes.",
69 "thickness columns direction");