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 process_music ();
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::process_music ()
46 staffline_ = get_spanner ();
48 Grob * it = unsmob_grob (get_property ("currentCommandColumn"));
50 staffline_->set_bound (LEFT,it);
52 announce_grob(staffline_, SCM_EOL);
57 Axis_group_engraver::get_spanner () const
59 return new Spanner (get_property ("VerticalAxisGroup"));
63 TODO: should we junk minimumVerticalExtent/extraVerticalExtent ?
67 Axis_group_engraver::finalize ()
69 String type = get_daddy_grav ()->context_name ();
70 SCM dims = get_property ("verticalExtent");
72 if (gh_pair_p (dims) && gh_number_p (ly_car (dims))
73 && gh_number_p (ly_cdr (dims)))
75 staffline_->set_extent (Grob::preset_extent_proc, Y_AXIS);
76 staffline_->set_grob_property ("Y-extent", dims);
79 dims = get_property ("minimumVerticalExtent");
80 if (gh_pair_p (dims) && gh_number_p (ly_car (dims))
81 && gh_number_p (ly_cdr (dims)))
82 staffline_->set_grob_property ("minimum-Y-extent", dims);
84 dims = get_property ("extraVerticalExtent");
85 if (gh_pair_p (dims) && gh_number_p (ly_car (dims))
86 && gh_number_p (ly_cdr (dims)))
87 staffline_->set_grob_property ("extra-Y-extent", dims);
89 Grob * it = unsmob_grob (get_property ("currentCommandColumn"));
92 staffline_->set_bound (RIGHT,it);
94 typeset_grob (staffline_);
99 Axis_group_engraver::acknowledge_grob (Grob_info i)
101 elts_.push (i.grob_);
105 maybe should check if our parent is set, because we now get a
106 cyclic parent relationship if we have two Axis_group_engravers in
109 Axis_group_engraver::process_acknowledged_grobs ()
112 for (int i=0; i < elts_.size (); i++)
114 Grob *par = elts_[i]->get_parent (Y_AXIS);
116 if ((!par || !Axis_group_interface::has_interface (par))
117 && ! elts_[i]->empty_b (Y_AXIS))
118 add_element (elts_[i]);
124 Axis_group_engraver::add_element (Grob*e)
126 Axis_group_interface::add_element (staffline_, e);
129 /****************************************************************/
133 maybenot such a good idea after all., to put class declarations in
138 #include "hara-kiri-group-spanner.hh"
139 #include "rhythmic-head.hh"
141 class Hara_kiri_engraver : public Axis_group_engraver
144 virtual Spanner*get_spanner ()const;
145 virtual void acknowledge_grob (Grob_info);
146 virtual void add_element (Grob *e);
148 TRANSLATOR_DECLARATIONS(Hara_kiri_engraver);
152 Hara_kiri_engraver::add_element (Grob*e)
154 Hara_kiri_group_spanner::add_element (staffline_, e);
159 Hara_kiri_engraver::get_spanner () const
161 Spanner * sp = new Spanner (get_property ("RemoveEmptyVerticalGroup"));
167 Hara_kiri_engraver::acknowledge_grob (Grob_info i)
169 Axis_group_engraver::acknowledge_grob (i);
170 if (i.grob_->internal_has_interface (ly_symbol2scm ("rhythmic-grob-interface")))
172 Hara_kiri_group_spanner::add_interesting_item (staffline_, i.grob_);
177 Hara_kiri_engraver::Hara_kiri_engraver()
181 ENTER_DESCRIPTION(Hara_kiri_engraver,
182 /* descr */ "Like Axis_group_engraver, but make a hara kiri spanner, and add "
183 "interesting items (ie. note heads, lyric syllables and normal rests) ",
184 /* creats*/ "RemoveEmptyVerticalGroup",
186 /* acks */ "grob-interface",
190 ENTER_DESCRIPTION(Axis_group_engraver,
191 /* descr */ "Group all objects created in this context in a VerticalAxisGroup spanner.",
192 /* creats*/ "VerticalAxisGroup",
194 /* acks */ "grob-interface",
195 /* reads */ "verticalExtent minimumVerticalExtent extraVerticalExtent",