2 axis-group-engraver.cc -- implement Axis_group_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1999--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "paper-column.hh"
11 #include "axis-group-interface.hh"
12 #include "engraver.hh"
13 #include "engraver-group-engraver.hh"
16 Put stuff in a Spanner with an Axis_group_interface.
17 Use as last element of a context.
19 class Axis_group_engraver : public Engraver
23 Link_array<Grob> elts_;
24 virtual void initialize ();
25 virtual void finalize ();
26 virtual void acknowledge_grob (Grob_info);
27 virtual void process_acknowledged_grobs ();
28 virtual Spanner* get_spanner () const;
29 virtual void add_element (Grob*) ;
31 TRANSLATOR_DECLARATIONS(Axis_group_engraver );
36 Axis_group_engraver::Axis_group_engraver ()
42 Axis_group_engraver::initialize ()
44 staffline_ = get_spanner ();
46 Grob * it = unsmob_grob (get_property ("currentCommandColumn"));
48 staffline_->set_bound (LEFT,it);
50 announce_grob(staffline_, SCM_EOL);
54 Axis_group_engraver::get_spanner () const
56 return new Spanner (get_property ("VerticalAxisGroup"));
60 Axis_group_engraver::finalize ()
62 String type = get_daddy_grav ()->context_name ();
63 SCM dims = get_property ("verticalExtent");
65 if (gh_pair_p (dims) && gh_number_p (ly_car (dims))
66 && gh_number_p (ly_cdr (dims)))
68 staffline_->set_extent (Grob::preset_extent_proc, Y_AXIS);
69 staffline_->set_grob_property ("Y-extent", dims);
72 dims = get_property ("minimumVerticalExtent");
73 if (gh_pair_p (dims) && gh_number_p (ly_car (dims))
74 && gh_number_p (ly_cdr (dims)))
75 staffline_->set_grob_property ("minimum-Y-extent", dims);
77 dims = get_property ("extraVerticalExtent");
78 if (gh_pair_p (dims) && gh_number_p (ly_car (dims))
79 && gh_number_p (ly_cdr (dims)))
80 staffline_->set_grob_property ("extra-Y-extent", dims);
82 Grob * it = unsmob_grob (get_property ("currentCommandColumn"));
85 staffline_->set_bound (RIGHT,it);
87 typeset_grob (staffline_);
92 Axis_group_engraver::acknowledge_grob (Grob_info i)
98 maybe should check if our parent is set, because we now get a
99 cyclic parent relationship if we have two Axis_group_engravers in
102 Axis_group_engraver::process_acknowledged_grobs ()
105 for (int i=0; i < elts_.size (); i++)
107 Grob *par = elts_[i]->get_parent (Y_AXIS);
109 if ((!par || !Axis_group_interface::has_interface (par))
110 && ! elts_[i]->empty_b (Y_AXIS))
111 add_element (elts_[i]);
117 Axis_group_engraver::add_element (Grob*e)
119 Axis_group_interface::add_element (staffline_, e);
122 /****************************************************************/
126 maybenot such a good idea after all., to put class declarations in
131 #include "hara-kiri-group-spanner.hh"
132 #include "rhythmic-head.hh"
134 class Hara_kiri_engraver : public Axis_group_engraver
137 virtual Spanner*get_spanner ()const;
138 virtual void acknowledge_grob (Grob_info);
139 virtual void add_element (Grob *e);
141 TRANSLATOR_DECLARATIONS(Hara_kiri_engraver);
145 Hara_kiri_engraver::add_element (Grob*e)
147 Hara_kiri_group_spanner::add_element (staffline_, e);
152 Hara_kiri_engraver::get_spanner () const
154 Spanner * sp = new Spanner (get_property ("RemoveEmptyVerticalGroup"));
160 Hara_kiri_engraver::acknowledge_grob (Grob_info i)
162 Axis_group_engraver::acknowledge_grob (i);
163 if (i.grob_->internal_has_interface (ly_symbol2scm ("rhythmic-grob-interface")))
165 Hara_kiri_group_spanner::add_interesting_item (staffline_, i.grob_);
170 Hara_kiri_engraver::Hara_kiri_engraver()
174 ENTER_DESCRIPTION(Hara_kiri_engraver,
175 /* descr */ "Like Axis_group_engraver, but make a hara kiri spanner, and add "
176 "interesting items (ie. note heads, lyric syllables and normal rests) ",
177 /* creats*/ "RemoveEmptyVerticalGroup",
179 /* acks */ "grob-interface",
183 ENTER_DESCRIPTION(Axis_group_engraver,
184 /* descr */ "Group all objects created in this context in a VerticalAxisGroup spanner.",
185 /* creats*/ "VerticalAxisGroup",
187 /* acks */ "grob-interface",
188 /* reads */ "verticalExtent minimumVerticalExtent extraVerticalExtent",