2 vertical-align-grav.cc -- implement Vertical_align_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
10 #include "vertical-align-grav.hh"
11 #include "vertical-align-spanner.hh"
13 Vertical_align_engraver::Vertical_align_engraver()
19 Vertical_align_engraver::do_creation_processing()
21 valign_p_ =new Vertical_align_spanner;
22 valign_p_->left_col_l_ = get_staff_info().command_pcol_l() ;
23 announce_element( Score_elem_info( valign_p_ , 0 ));
27 Vertical_align_engraver::do_removal_processing()
29 valign_p_->right_col_l_ = get_staff_info().command_pcol_l();
30 typeset_element( valign_p_);
35 Vertical_align_engraver::acknowledge_element(Score_elem_info i)
37 if ( i.origin_grav_l_arr_.size() == 2 &&
38 i.elem_l_->is_type_b(Vertical_group::static_name()) &&
39 !i.elem_l_->y_group_l_ ) {
40 assert( !valign_p_->contains_b( i.elem_l_) );
42 valign_p_->add ( i.elem_l_ );
47 IMPLEMENT_IS_TYPE_B1(Vertical_align_engraver, Engraver);
48 ADD_THIS_ENGRAVER(Vertical_align_engraver);