lily/separating-line-group-engraver.cc

   1 /*
   2   separating-line-group-grav.cc --  implement Separating_line_group_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1998--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "separating-line-group-engraver.hh"
  11 #include "separating-group-spanner.hh"
  12 #include "single-malt-grouping-item.hh"
  13 #include "paper-column.hh"
  14 #include "paper-def.hh"
  15
  16 Separating_line_group_engraver::Separating_line_group_engraver ()
  17 {
  18   sep_span_p_ = 0;
  19   break_malt_p_ = 0;
  20   nobreak_malt_p_ =0;
  21 }
  22
  23 void
  24 Separating_line_group_engraver::do_creation_processing ()
  25 {
  26   sep_span_p_ = new Separating_group_spanner;
  27   announce_element (Score_element_info (sep_span_p_, 0));
  28   sep_span_p_->set_bounds (LEFT, get_staff_info ().command_pcol_l ());
  29 }
  30
  31 void
  32 Separating_line_group_engraver::do_removal_processing ()
  33 {
  34   SCM sz (get_property ("postBreakPadding", 0));
  35   if (SCM_NUMBERP(sz))
  36     {
  37       sep_span_p_->padding_f_ = Real(sz);
  38     }
  39   else
  40     {
  41       sep_span_p_->padding_f_ = paper_l ()->get_realvar (ly_symbol ("postBreakPadding"));
  42     }
  43
  44   sep_span_p_->set_bounds (RIGHT, get_staff_info ().command_pcol_l ());
  45   typeset_element (sep_span_p_);
  46   sep_span_p_ =0;
  47 }
  48
  49 void
  50 Separating_line_group_engraver::acknowledge_element (Score_element_info i)
  51 {
  52   Item * it = dynamic_cast <Item *> (i.elem_l_);
  53   if (it && !it->parent_l (X_AXIS))
  54     {
  55       bool ib =it->breakable_b ();
  56       Single_malt_grouping_item *&p_ref_ (ib ? break_malt_p_
  57                                           : nobreak_malt_p_);
  58
  59       if (!p_ref_)
  60         {
  61           p_ref_ = new Single_malt_grouping_item;
  62           if (ib)
  63             p_ref_->set_elt_property (breakable_scm_sym, SCM_BOOL_T);
  64           announce_element (Score_element_info (p_ref_, 0));
  65         }
  66       p_ref_->add_item (it);
  67     }
  68 }
  69
  70 void
  71 Separating_line_group_engraver::do_pre_move_processing ()
  72 {
  73   if (break_malt_p_)
  74     {
  75       sep_span_p_->add_spacing_unit (break_malt_p_);
  76
  77       typeset_element (break_malt_p_);
  78       break_malt_p_ =0;
  79     }
  80   if (nobreak_malt_p_)
  81     {
  82       sep_span_p_->add_spacing_unit (nobreak_malt_p_);
  83       typeset_element (nobreak_malt_p_);
  84       nobreak_malt_p_ =0;
  85     }
  86 }
  87
  88
  89
  90 ADD_THIS_TRANSLATOR( Separating_line_group_engraver);