+ Spanner *valign_;
+ bool qualifies (Grob_info) const;
+ SCM id_to_group_hashtab_;
+
+public:
+ TRANSLATOR_DECLARATIONS (Vertical_align_engraver);
+ DECLARE_ACKNOWLEDGER (axis_group);
+
+protected:
+ virtual void derived_mark () const;
+ void process_music ();
+ virtual void finalize ();
+ virtual void initialize ();
+};
+
+ADD_ACKNOWLEDGER (Vertical_align_engraver, axis_group);
+ADD_TRANSLATOR (Vertical_align_engraver,
+ /* doc */
+ "Catch groups (staves, lyrics lines, etc.) and stack them"
+ " vertically.",
+
+ /* create */
+ "VerticalAlignment ",
+
+ /* read */
+ "alignAboveContext "
+ "alignBelowContext ",
+
+ /* write */
+ ""
+ );
+
+Vertical_align_engraver::Vertical_align_engraver ()
+{
+ valign_ = 0;
+ id_to_group_hashtab_ = SCM_EOL;