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 "align-interface.hh"
13 #include "note-column.hh"
15 #include "directional-element-interface.hh"
16 #include "side-position-interface.hh"
17 #include "local-key-item.hh"
20 Catch notes, and put them in a row. Used for aligning grace notes.
22 class Align_note_column_engraver: public Engraver
25 Score_element * now_column_l_;
26 Score_element * accidental_l_;
28 virtual void process_acknowledged ();
29 virtual void do_post_move_processing ();
30 virtual void do_creation_processing ();
31 virtual void do_removal_processing ();
32 virtual void acknowledge_element (Score_element_info);
34 VIRTUAL_COPY_CONS(Translator);
35 Align_note_column_engraver ();
38 Align_note_column_engraver::Align_note_column_engraver()
46 Align_note_column_engraver::do_creation_processing ()
48 align_item_p_ = new Item (get_property ("basicGraceAlignItemProperties"));
49 Grace_align_item::set_interface (align_item_p_);
50 Side_position::set_axis (align_item_p_, X_AXIS);
51 Side_position::set_direction (align_item_p_, LEFT);
53 // needed for setting font size.
54 announce_element (align_item_p_, 0);
58 Align_note_column_engraver::do_removal_processing ()
60 SCM al = get_property ("graceAlignPosition");
63 Direction d = to_dir (al);
64 Directional_element_interface::set (align_item_p_,d);
67 typeset_element (align_item_p_);
72 Align_note_column_engraver::acknowledge_element (Score_element_info inf)
74 if (Note_column::has_interface(inf.elem_l_))
76 now_column_l_ =inf.elem_l_;
78 else if (Local_key_item::has_interface (inf.elem_l_))
80 accidental_l_ = inf.elem_l_;
84 Align_note_column_engraver::process_acknowledged ()
86 if (now_column_l_ && accidental_l_)
89 /* Can't inspect width of Local_key_item, since
91 A. it may not be fully built
93 B. it has no pscore_l_ field.
96 SCM grsp = get_property ("graceAccidentalSpace");
97 if (gh_number_p(grsp))
102 Real extra_space = gh_scm2double(grsp);
103 SCM e = gh_cons (gh_double2scm (-extra_space), gh_double2scm (0.0));
104 now_column_l_->set_elt_property ("extra-space", e);
110 Align_interface::add_element (align_item_p_,now_column_l_);
116 Align_note_column_engraver::do_post_move_processing ()
122 ADD_THIS_TRANSLATOR(Align_note_column_engraver);