2 vertical-align-grav.cc -- implement Vertical_align_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
8 #include "translator-group.hh"
9 #include "axis-group-engraver.hh"
11 #include "vertical-align-engraver.hh"
12 #include "axis-align-spanner.hh"
13 #include "axis-group-spanner.hh"
15 Vertical_align_engraver::Vertical_align_engraver()
21 Vertical_align_engraver::do_creation_processing()
23 valign_p_ =new Axis_align_spanner;
24 valign_p_->set_axis (Y_AXIS);
25 valign_p_->stacking_dir_ = DOWN;
27 valign_p_->set_bounds(LEFT,get_staff_info().command_pcol_l ());
28 announce_element (Score_element_info (valign_p_ , 0));
32 Vertical_align_engraver::do_removal_processing()
34 Scalar dist (get_property ("maxVerticalAlign", 0));
35 if (dist.length_i () && dist.isnum_b ())
37 valign_p_->threshold_interval_[BIGGER] = Real (dist);
40 dist = get_property ("minVerticalAlign", 0);
41 if (dist.length_i () && dist.isnum_b ())
43 valign_p_->threshold_interval_[SMALLER] = Real (dist);
46 dist = get_property ("alignmentReference",0);
47 if (dist.length_i () && dist.isnum_b ())
49 valign_p_->align_dir_ = int (dist);
51 valign_p_->set_bounds(RIGHT,get_staff_info().command_pcol_l ());
52 typeset_element (valign_p_);
58 Vertical_align_engraver::qualifies_b (Score_element_info i) const
60 Translator * t = i.origin_grav_l_arr_[0];
61 int sz = i.origin_grav_l_arr_.size() ;
63 return (sz == 1 && dynamic_cast<Translator_group*> (t))
64 || (sz == 2 && dynamic_cast<Axis_group_engraver*> (t));
68 Vertical_align_engraver::acknowledge_element (Score_element_info i)
72 valign_p_->add_element (i.elem_l_);
78 ADD_THIS_TRANSLATOR(Vertical_align_engraver);