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>
10 #include "vertical-align-engraver.hh"
11 #include "axis-align-spanner.hh"
12 #include "axis-group-spanner.hh"
14 Vertical_align_engraver::Vertical_align_engraver()
20 Vertical_align_engraver::do_creation_processing()
22 valign_p_ =new Axis_align_spanner;
23 valign_p_->set_axis (Y_AXIS);
24 valign_p_->stacking_dir_ = DOWN;
26 valign_p_->set_bounds(LEFT,get_staff_info().command_pcol_l ());
27 announce_element (Score_element_info (valign_p_ , 0));
31 Vertical_align_engraver::do_removal_processing()
33 Scalar dist (get_property ("maxVerticalAlign", 0));
34 if (dist.length_i () && dist.isnum_b ())
36 valign_p_->threshold_interval_[BIGGER] = Real (dist);
39 dist = get_property ("minVerticalAlign", 0);
40 if (dist.length_i () && dist.isnum_b ())
42 valign_p_->threshold_interval_[SMALLER] = Real (dist);
45 dist = get_property ("alignmentReference",0);
46 if (dist.length_i () && dist.isnum_b ())
48 valign_p_->align_dir_ = int (dist);
50 valign_p_->set_bounds(RIGHT,get_staff_info().command_pcol_l ());
51 typeset_element (valign_p_);
56 Vertical_align_engraver::acknowledge_element (Score_element_info i)
58 if (i.origin_grav_l_arr_.size() == 1 &&
59 dynamic_cast<Axis_group_spanner *> (i.elem_l_)
60 && !i.elem_l_->parent_l (Y_AXIS))
62 valign_p_->add_element (i.elem_l_);
68 ADD_THIS_TRANSLATOR(Vertical_align_engraver);