lily/lyric-extender.cc

   1 /*
   2   lyric-extender.cc -- implement Lyric_extender
   3   source file of the GNU LilyPond music typesetter
   4
   5   (c)  1998--2000 Jan Nieuwenhuizen <janneke@gnu.org>
   6   Han-Wen Nienhuys
   7 */
   8
   9 #include "dimension-cache.hh"
  10 #include "box.hh"
  11 #include "debug.hh"
  12 #include "lookup.hh"
  13 #include "molecule.hh"
  14 #include "paper-column.hh"
  15 #include "paper-def.hh"
  16 #include "lyric-extender.hh"
  17
  18
  19 MAKE_SCHEME_SCORE_ELEMENT_CALLBACK(Lyric_extender,brew_molecule)
  20 SCM
  21 Lyric_extender::brew_molecule (SCM smob)
  22 {
  23   Spanner *sp = dynamic_cast<Spanner*> (unsmob_element (smob));
  24
  25   Real leftext = sp->get_bound (LEFT)->extent (X_AXIS).length ();
  26   Real ss = sp->paper_l ()->get_var ("staffspace");
  27   Real w = sp->spanner_length () - leftext - ss/2;
  28
  29   Real h = sp->paper_l ()->get_var ("extender_height");
  30   Molecule  mol (sp->lookup_l ()->filledbox ( Box (Interval (0,w), Interval (0,h))));
  31   mol.translate (Offset (leftext, 0));
  32   return mol.create_scheme();
  33 }
  34
  35 void
  36 Lyric_extender::set_textitem (Direction d, Score_element*s)
  37 {
  38   elt_l_->set_bound (d, s);
  39   elt_l_->add_dependency (s);
  40 }
  41
  42 Lyric_extender::Lyric_extender (Spanner*s)
  43 {
  44   elt_l_ = s;
  45 }
  46