lily/line-group-grav.cc

   1 /*
   2   staff-gravs.cc -- implement Line_group_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 #include "staff-sym.hh"
  10 #include "vertical-group-spanner.hh"
  11 #include "command-request.hh"
  12 #include "bar.hh"
  13 #include "debug.hh"
  14 #include "staffline.hh"
  15 #include "line-group-grav.hh"
  16
  17 Line_group_engraver::Line_group_engraver()
  18 {
  19     staffline_p_ =0;
  20 }
  21
  22 void
  23 Line_group_engraver::acknowledge_element(Score_elem_info  elem)
  24 {
  25     if ( !elem.elem_l_->y_group_l_ )
  26         staffline_p_->add_element(elem.elem_l_);
  27 }
  28
  29
  30 void
  31 Line_group_engraver::do_removal_processing()
  32 {
  33     staffline_p_->right_col_l_ = get_staff_info().command_pcol_l();
  34     typeset_element(staffline_p_);
  35     staffline_p_ = 0;
  36 }
  37
  38 void
  39 Line_group_engraver::do_creation_processing()
  40 {
  41     staffline_p_ = new Vertical_group_spanner ;
  42     staffline_p_->left_col_l_ = get_staff_info().command_pcol_l();
  43
  44     // don't broadcast to self.
  45     announce_element(Score_elem_info(staffline_p_,0));
  46 }
  47
  48
  49
  50 IMPLEMENT_IS_TYPE_B1(Line_group_engraver,Engraver);
  51 ADD_THIS_ENGRAVER(Line_group_engraver);
  52