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 ()
71 programming_error ("Huh? This context never lived?");
75 String type = get_daddy_grav ()->context_name ();
76 SCM dims = get_property ("verticalExtent");
78 if (gh_pair_p (dims) && gh_number_p (ly_car (dims))
79 && gh_number_p (ly_cdr (dims)))
81 staffline_->set_extent (Grob::preset_extent_proc, Y_AXIS);
82 staffline_->set_grob_property ("Y-extent", dims);
85 dims = get_property ("minimumVerticalExtent");
86 if (gh_pair_p (dims) && gh_number_p (ly_car (dims))
87 && gh_number_p (ly_cdr (dims)))
88 staffline_->set_grob_property ("minimum-Y-extent", dims);
90 dims = get_property ("extraVerticalExtent");
91 if (gh_pair_p (dims) && gh_number_p (ly_car (dims))
92 && gh_number_p (ly_cdr (dims)))
93 staffline_->set_grob_property ("extra-Y-extent", dims);
95 Grob * it = unsmob_grob (get_property ("currentCommandColumn"));
98 staffline_->set_bound (RIGHT,it);
100 typeset_grob (staffline_);
105 Axis_group_engraver::acknowledge_grob (Grob_info i)
107 elts_.push (i.grob_);
111 maybe should check if our parent is set, because we now get a
112 cyclic parent relationship if we have two Axis_group_engravers in
115 Axis_group_engraver::process_acknowledged_grobs ()
118 for (int i=0; i < elts_.size (); i++)
120 Grob *par = elts_[i]->get_parent (Y_AXIS);
122 if (!par || !Axis_group_interface::has_interface (par))
123 if (elts_[i]->empty_b (Y_AXIS))
126 We have to do _something_, otherwise staff objects will
127 end up with System as parent.
130 elts_[i]->set_parent (staffline_, Y_AXIS);
133 add_element (elts_[i]);
139 Axis_group_engraver::add_element (Grob*e)
141 Axis_group_interface::add_element (staffline_, e);
144 /****************************************************************/
148 maybenot such a good idea after all., to put class declarations in
153 #include "hara-kiri-group-spanner.hh"
154 #include "rhythmic-head.hh"
156 class Hara_kiri_engraver : public Axis_group_engraver
159 virtual Spanner*get_spanner ()const;
160 virtual void acknowledge_grob (Grob_info);
161 virtual void add_element (Grob *e);
163 TRANSLATOR_DECLARATIONS(Hara_kiri_engraver);
167 Hara_kiri_engraver::add_element (Grob*e)
169 Hara_kiri_group_spanner::add_element (staffline_, e);
174 Hara_kiri_engraver::get_spanner () const
176 Spanner * sp = new Spanner (get_property ("RemoveEmptyVerticalGroup"));
182 Hara_kiri_engraver::acknowledge_grob (Grob_info i)
184 Axis_group_engraver::acknowledge_grob (i);
185 if (i.grob_->internal_has_interface (ly_symbol2scm ("rhythmic-grob-interface")))
187 Hara_kiri_group_spanner::add_interesting_item (staffline_, i.grob_);
192 Hara_kiri_engraver::Hara_kiri_engraver()
196 ENTER_DESCRIPTION(Hara_kiri_engraver,
197 /* descr */ "Like Axis_group_engraver, but make a hara kiri spanner, and add "
198 "interesting items (ie. note heads, lyric syllables and normal rests) ",
199 /* creats*/ "RemoveEmptyVerticalGroup",
201 /* acks */ "grob-interface",
205 ENTER_DESCRIPTION(Axis_group_engraver,
206 /* descr */ "Group all objects created in this context in a VerticalAxisGroup spanner.",
207 /* creats*/ "VerticalAxisGroup",
209 /* acks */ "grob-interface",
210 /* reads */ "verticalExtent minimumVerticalExtent extraVerticalExtent",