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 (is_number_pair (dims))
75 staffline_->set_extent (dims, Y_AXIS);
77 dims = get_property ("minimumVerticalExtent");
78 if (is_number_pair (dims) )
79 staffline_->set_grob_property ("minimum-Y-extent", dims);
81 dims = get_property ("extraVerticalExtent");
82 if (is_number_pair (dims))
83 staffline_->set_grob_property ("extra-Y-extent", dims);
85 Grob * it = unsmob_grob (get_property ("currentCommandColumn"));
87 staffline_->set_bound (RIGHT,it);
89 typeset_grob (staffline_);
94 Axis_group_engraver::acknowledge_grob (Grob_info i)
100 maybe should check if our parent is set, because we now get a
101 cyclic parent relationship if we have two Axis_group_engravers in
104 Axis_group_engraver::process_acknowledged_grobs ()
107 for (int i=0; i < elts_.size (); i++)
109 Grob *par = elts_[i]->get_parent (Y_AXIS);
111 if (!par || !Axis_group_interface::has_interface (par))
112 if (elts_[i]->is_empty (Y_AXIS))
115 We have to do _something_, otherwise staff objects will
116 end up with System as parent.
119 elts_[i]->set_parent (staffline_, Y_AXIS);
122 add_element (elts_[i]);
128 Axis_group_engraver::add_element (Grob*e)
130 Axis_group_interface::add_element (staffline_, e);
133 /****************************************************************/
137 maybenot such a good idea after all., to put class declarations in
142 #include "hara-kiri-group-spanner.hh"
143 #include "rhythmic-head.hh"
145 class Hara_kiri_engraver : public Axis_group_engraver
148 virtual Spanner*get_spanner ();
149 virtual void acknowledge_grob (Grob_info);
150 virtual void add_element (Grob *e);
152 TRANSLATOR_DECLARATIONS(Hara_kiri_engraver);
156 Hara_kiri_engraver::add_element (Grob*e)
158 Hara_kiri_group_spanner::add_element (staffline_, e);
163 Hara_kiri_engraver::get_spanner ()
165 Spanner * sp = make_spanner ("RemoveEmptyVerticalGroup");
171 Hara_kiri_engraver::acknowledge_grob (Grob_info i)
173 Axis_group_engraver::acknowledge_grob (i);
174 if (i.grob_->internal_has_interface (ly_symbol2scm ("rhythmic-grob-interface"))
175 || i.grob_->internal_has_interface (ly_symbol2scm ("lyric-interface"))
178 Hara_kiri_group_spanner::add_interesting_item (staffline_, i.grob_);
183 Hara_kiri_engraver::Hara_kiri_engraver()
187 ENTER_DESCRIPTION(Hara_kiri_engraver,
188 /* descr */ "Like Axis_group_engraver, but make a hara kiri spanner, and add "
189 "interesting items (ie. note heads, lyric syllables and normal rests) ",
190 /* creats*/ "RemoveEmptyVerticalGroup",
192 /* acks */ "grob-interface",
196 ENTER_DESCRIPTION(Axis_group_engraver,
197 /* descr */ "Group all objects created in this context in a VerticalAxisGroup spanner.",
198 /* creats*/ "VerticalAxisGroup",
200 /* acks */ "grob-interface",
201 /* reads */ "verticalExtent minimumVerticalExtent extraVerticalExtent",