-#include "p-col.hh"
-#include "vertical-align-engraver.hh"
-#include "vertical-align-spanner.hh"
-#include "vertical-group-spanner.hh"
+class Vertical_align_engraver : public Engraver
+{
+ Spanner * valign_;
+ bool qualifies (Grob_info) const;
+public:
+ TRANSLATOR_DECLARATIONS (Vertical_align_engraver);
+protected:
+ virtual void acknowledge_grob (Grob_info);
+ virtual void process_music ();
+ virtual void finalize ();
+};