2 vertical-align-grav.cc -- implement Vertical_align_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
8 #include "translator-group.hh"
9 #include "paper-column.hh"
10 #include "align-interface.hh"
11 #include "span-bar.hh"
12 #include "axis-group-interface.hh"
13 #include "engraver.hh"
16 class Vertical_align_engraver : public Engraver
19 bool qualifies_b (Score_element_info) const;
21 VIRTUAL_COPY_CONS(Translator);
22 Vertical_align_engraver();
24 virtual void acknowledge_element (Score_element_info);
25 virtual void do_creation_processing();
26 virtual void do_removal_processing();
29 Vertical_align_engraver::Vertical_align_engraver()
35 Vertical_align_engraver::do_creation_processing()
37 valign_p_ =new Spanner (get_property ("VerticalAlignment"));
38 valign_p_->set_bound(LEFT,unsmob_element (get_property ("currentCommandColumn")));
39 announce_element (valign_p_ , 0);
43 Vertical_align_engraver::do_removal_processing()
45 valign_p_->set_bound(RIGHT,unsmob_element (get_property ("currentCommandColumn")));
46 typeset_element (valign_p_);
52 Vertical_align_engraver::qualifies_b (Score_element_info i) const
54 int sz = i.origin_trans_l_arr ((Translator*)this).size() ;
56 return sz > 1 && Axis_group_interface::has_interface (i.elem_l_)
57 && !i.elem_l_->parent_l (Y_AXIS) && Axis_group_interface::axis_b (i.elem_l_, Y_AXIS);
61 Vertical_align_engraver::acknowledge_element (Score_element_info i)
65 Align_interface::add_element (valign_p_,i.elem_l_);
69 ADD_THIS_TRANSLATOR(Vertical_align_engraver);