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"
18 Put stuff in a Spanner with an Axis_group_interface.
19 Use as last element of a context.
21 class Axis_group_engraver : public Engraver
25 Link_array<Grob> elts_;
26 virtual void process_music ();
27 virtual void finalize ();
28 virtual void acknowledge_grob (Grob_info);
29 virtual void process_acknowledged_grobs ();
30 virtual Spanner* get_spanner () ;
31 virtual void add_element (Grob*) ;
33 TRANSLATOR_DECLARATIONS (Axis_group_engraver);
36 Axis_group_engraver::Axis_group_engraver ()
42 Axis_group_engraver::process_music ()
46 staffline_ = get_spanner ();
48 Grob * it = unsmob_grob (get_property ("currentCommandColumn"));
50 staffline_->set_bound (LEFT,it);
55 Axis_group_engraver::get_spanner ()
57 return make_spanner ("VerticalAxisGroup", SCM_EOL);
61 TODO: should we junk minimumVerticalExtent/extraVerticalExtent ?
65 Axis_group_engraver::finalize ()
70 String type = context ()->context_name ();
71 SCM dims = get_property ("verticalExtent");
73 if (is_number_pair (dims))
74 staffline_->set_extent (dims, Y_AXIS);
76 dims = get_property ("minimumVerticalExtent");
77 if (is_number_pair (dims) )
78 staffline_->set_property ("minimum-Y-extent", dims);
80 dims = get_property ("extraVerticalExtent");
81 if (is_number_pair (dims))
82 staffline_->set_property ("extra-Y-extent", dims);
84 Grob * it = unsmob_grob (get_property ("currentCommandColumn"));
86 staffline_->set_bound (RIGHT,it);
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 if (elts_[i]->is_empty (Y_AXIS))
113 We have to do _something_, otherwise staff objects will
114 end up with System as parent.
117 elts_[i]->set_parent (staffline_, Y_AXIS);
120 add_element (elts_[i]);
126 Axis_group_engraver::add_element (Grob*e)
128 Axis_group_interface::add_element (staffline_, e);
131 /****************************************************************/
135 maybenot such a good idea after all., to put class declarations in
140 #include "hara-kiri-group-spanner.hh"
141 #include "rhythmic-head.hh"
143 class Hara_kiri_engraver : public Axis_group_engraver
146 virtual Spanner*get_spanner ();
147 virtual void acknowledge_grob (Grob_info);
148 virtual void add_element (Grob *e);
150 TRANSLATOR_DECLARATIONS (Hara_kiri_engraver);
154 Hara_kiri_engraver::add_element (Grob*e)
156 Hara_kiri_group_spanner::add_element (staffline_, e);
161 Hara_kiri_engraver::get_spanner ()
163 Spanner * sp = make_spanner ("RemoveEmptyVerticalGroup", SCM_EOL);
169 Hara_kiri_engraver::acknowledge_grob (Grob_info i)
171 Axis_group_engraver::acknowledge_grob (i);
172 if (i.grob_->internal_has_interface (ly_symbol2scm ("rhythmic-grob-interface"))
173 || i.grob_->internal_has_interface (ly_symbol2scm ("lyric-interface"))
176 Hara_kiri_group_spanner::add_interesting_item (staffline_, i.grob_);
181 Hara_kiri_engraver::Hara_kiri_engraver ()
185 ENTER_DESCRIPTION (Hara_kiri_engraver,
186 /* descr */ "Like Axis_group_engraver, but make a hara-kiri spanner, and add "
187 "interesting items (ie. note heads, lyric syllables and normal rests) ",
188 /* creats*/ "RemoveEmptyVerticalGroup",
190 /* acks */ "grob-interface",
194 ENTER_DESCRIPTION (Axis_group_engraver,
195 /* descr */ "Group all objects created in this context in a VerticalAxisGroup spanner.",
196 /* creats*/ "VerticalAxisGroup",
198 /* acks */ "grob-interface",
199 /* reads */ "verticalExtent minimumVerticalExtent extraVerticalExtent",