2 axis-group-engraver.cc -- implement Axis_group_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1999--2004 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"
17 Put stuff in a Spanner with an Axis_group_interface.
18 Use as last element of a context.
20 class Axis_group_engraver : public Engraver
24 Link_array<Grob> elts_;
25 virtual void process_music ();
26 virtual void finalize ();
27 virtual void acknowledge_grob (Grob_info);
28 virtual void process_acknowledged_grobs ();
29 virtual Spanner* get_spanner () ;
30 virtual void add_element (Grob*) ;
32 TRANSLATOR_DECLARATIONS(Axis_group_engraver);
35 Axis_group_engraver::Axis_group_engraver ()
41 Axis_group_engraver::process_music ()
45 staffline_ = get_spanner ();
47 Grob * it = unsmob_grob (get_property ("currentCommandColumn"));
49 staffline_->set_bound (LEFT,it);
51 announce_grob(staffline_, SCM_EOL);
56 Axis_group_engraver::get_spanner ()
58 return make_spanner ("VerticalAxisGroup");
62 TODO: should we junk minimumVerticalExtent/extraVerticalExtent ?
66 Axis_group_engraver::finalize ()
71 String type = get_daddy_grav ()->context_name ();
72 SCM dims = get_property ("verticalExtent");
74 if (gh_pair_p (dims) && gh_number_p (ly_car (dims))
75 && gh_number_p (ly_cdr (dims)))
77 staffline_->set_extent (Grob::preset_extent_proc, Y_AXIS);
78 staffline_->set_grob_property ("Y-extent", dims);
81 dims = get_property ("minimumVerticalExtent");
82 if (gh_pair_p (dims) && gh_number_p (ly_car (dims))
83 && gh_number_p (ly_cdr (dims)))
84 staffline_->set_grob_property ("minimum-Y-extent", dims);
86 dims = get_property ("extraVerticalExtent");
87 if (gh_pair_p (dims) && gh_number_p (ly_car (dims))
88 && gh_number_p (ly_cdr (dims)))
89 staffline_->set_grob_property ("extra-Y-extent", dims);
91 Grob * it = unsmob_grob (get_property ("currentCommandColumn"));
94 staffline_->set_bound (RIGHT,it);
96 typeset_grob (staffline_);
101 Axis_group_engraver::acknowledge_grob (Grob_info i)
103 elts_.push (i.grob_);
107 maybe should check if our parent is set, because we now get a
108 cyclic parent relationship if we have two Axis_group_engravers in
111 Axis_group_engraver::process_acknowledged_grobs ()
114 for (int i=0; i < elts_.size (); i++)
116 Grob *par = elts_[i]->get_parent (Y_AXIS);
118 if (!par || !Axis_group_interface::has_interface (par))
119 if (elts_[i]->is_empty (Y_AXIS))
122 We have to do _something_, otherwise staff objects will
123 end up with System as parent.
126 elts_[i]->set_parent (staffline_, Y_AXIS);
129 add_element (elts_[i]);
135 Axis_group_engraver::add_element (Grob*e)
137 Axis_group_interface::add_element (staffline_, e);
140 /****************************************************************/
144 maybenot such a good idea after all., to put class declarations in
149 #include "hara-kiri-group-spanner.hh"
150 #include "rhythmic-head.hh"
152 class Hara_kiri_engraver : public Axis_group_engraver
155 virtual Spanner*get_spanner ();
156 virtual void acknowledge_grob (Grob_info);
157 virtual void add_element (Grob *e);
159 TRANSLATOR_DECLARATIONS(Hara_kiri_engraver);
163 Hara_kiri_engraver::add_element (Grob*e)
165 Hara_kiri_group_spanner::add_element (staffline_, e);
170 Hara_kiri_engraver::get_spanner ()
172 Spanner * sp = make_spanner ("RemoveEmptyVerticalGroup");
178 Hara_kiri_engraver::acknowledge_grob (Grob_info i)
180 Axis_group_engraver::acknowledge_grob (i);
181 if (i.grob_->internal_has_interface (ly_symbol2scm ("rhythmic-grob-interface"))
182 || i.grob_->internal_has_interface (ly_symbol2scm ("lyric-interface"))
185 Hara_kiri_group_spanner::add_interesting_item (staffline_, i.grob_);
190 Hara_kiri_engraver::Hara_kiri_engraver()
194 ENTER_DESCRIPTION(Hara_kiri_engraver,
195 /* descr */ "Like Axis_group_engraver, but make a hara kiri spanner, and add "
196 "interesting items (ie. note heads, lyric syllables and normal rests) ",
197 /* creats*/ "RemoveEmptyVerticalGroup",
199 /* acks */ "grob-interface",
203 ENTER_DESCRIPTION(Axis_group_engraver,
204 /* descr */ "Group all objects created in this context in a VerticalAxisGroup spanner.",
205 /* creats*/ "VerticalAxisGroup",
207 /* acks */ "grob-interface",
208 /* reads */ "verticalExtent minimumVerticalExtent extraVerticalExtent",