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"
18 #include "paper-def.hh"
21 Catch notes, and put them in a row. Used for aligning grace notes.
23 class Align_note_column_engraver: public Engraver
26 Score_element * now_column_l_;
27 Score_element * accidental_l_;
29 virtual void process_acknowledged ();
30 virtual void do_post_move_processing ();
31 virtual void do_creation_processing ();
32 virtual void do_removal_processing ();
33 virtual void acknowledge_element (Score_element_info);
35 VIRTUAL_COPY_CONS(Translator);
36 Align_note_column_engraver ();
39 Align_note_column_engraver::Align_note_column_engraver()
47 Align_note_column_engraver::do_creation_processing ()
49 align_item_p_ = new Item (get_property ("GraceAlignment"));
50 Grace_align_item::set_interface (align_item_p_);
51 Side_position::set_axis (align_item_p_, X_AXIS);
52 Side_position::set_direction (align_item_p_, LEFT);
54 // needed for setting font size.
55 announce_element (align_item_p_, 0);
59 Align_note_column_engraver::do_removal_processing ()
63 programming_error ("Align_note_column_engraver:: urg\n");
67 SCM al = get_property ("graceAlignPosition");
70 Direction d = to_dir (al);
71 Directional_element_interface::set (align_item_p_,d);
74 typeset_element (align_item_p_);
79 Align_note_column_engraver::acknowledge_element (Score_element_info inf)
81 if (Note_column::has_interface(inf.elem_l_))
83 now_column_l_ =inf.elem_l_;
85 else if (Local_key_item::has_interface (inf.elem_l_))
87 accidental_l_ = inf.elem_l_;
91 Align_note_column_engraver::process_acknowledged ()
93 if (now_column_l_ && accidental_l_)
96 /* Can't inspect width of Local_key_item, since
98 A. it may not be fully built
100 B. it has no pscore_l_ field.
103 UGH UGH: separate note-spacing into separate class, and
104 use that to space grace notes.
106 SCM grsp = get_property ("graceAccidentalSpace") ;
107 if (gh_number_p(grsp))
112 Real extra_space = gh_scm2double(grsp);
113 SCM e = gh_cons (gh_double2scm (-extra_space),
114 gh_double2scm (0.0));
115 now_column_l_->set_elt_property ("extra-space", e);
119 if (now_column_l_ && !align_item_p_)
120 programming_error ("Align_note_column_engraver:: urg\n");
126 Align_interface::add_element (align_item_p_,now_column_l_);
132 Align_note_column_engraver::do_post_move_processing ()
138 ADD_THIS_TRANSLATOR(Align_note_column_engraver);