2 align-note-column-engraver.cc -- implement Align_note_column_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1999--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "engraver.hh"
11 #include "grace-align-item.hh"
12 #include "note-column.hh"
13 #include "local-key-item.hh"
15 #include "directional-element-interface.hh"
16 #include "side-position-interface.hh"
19 Catch notes, and put them in a row. Used for aligning grace notes.
21 class Align_note_column_engraver: public Engraver
23 Grace_align_item * align_item_p_;
24 Note_column * now_column_l_;
25 Local_key_item * accidental_l_;
27 virtual void process_acknowledged ();
28 virtual void do_post_move_processing ();
29 virtual void do_creation_processing ();
30 virtual void do_removal_processing ();
31 virtual void acknowledge_element (Score_element_info);
33 VIRTUAL_COPY_CONS(Translator);
34 Align_note_column_engraver ();
37 Align_note_column_engraver::Align_note_column_engraver()
45 Align_note_column_engraver::do_creation_processing ()
47 align_item_p_ = new Grace_align_item;
48 side_position (align_item_p_).set_axis (X_AXIS);
49 side_position (align_item_p_).set_direction (LEFT);
50 // needed for setting font size.
51 announce_element (Score_element_info (align_item_p_, 0));
55 Align_note_column_engraver::do_removal_processing ()
57 SCM al = get_property ("graceAlignPosition");
60 Direction d = to_dir (al);
61 directional_element (align_item_p_).set (d);
64 typeset_element (align_item_p_);
69 Align_note_column_engraver::acknowledge_element (Score_element_info inf)
71 if (Note_column * n = dynamic_cast<Note_column*> (inf.elem_l_))
75 else if (Local_key_item * it = dynamic_cast<Local_key_item*> (inf.elem_l_))
81 Align_note_column_engraver::process_acknowledged ()
83 if (now_column_l_ && accidental_l_)
86 /* Can't inspect width of Local_key_item, since
88 A. it may not be fully built
90 B. it has no pscore_l_ field.
93 SCM grsp = get_property ("graceAccidentalSpace");
94 if (gh_number_p(grsp))
99 Real extra_space = gh_scm2double(grsp);
100 SCM e = gh_cons (gh_double2scm (-extra_space), gh_double2scm (0.0));
101 now_column_l_->set_elt_property ("extra-space", e);
107 align_item_p_->add_element (now_column_l_);
113 Align_note_column_engraver::do_post_move_processing ()
119 ADD_THIS_TRANSLATOR(Align_note_column_engraver);