lily/include/directional-spanner.hh

   1 /*
   2   directional-spanner.hh -- part of GNU LilyPond
   3
   4   (c) 1996,97 Han-Wen Nienhuys
   5 */
   6
   7 #ifndef DIRECTIONALSPANNER_HH
   8 #define DIRECTIONALSPANNER_HH
   9
  10 #include "spanner.hh"
  11
  12 /// a spanner which can be pointing "up" or "down"
  13 class Directional_spanner : public Spanner{
  14 public:
  15
  16     /// -1 below heads, +1 above heads.
  17     Direction dir_;
  18     Directional_spanner();
  19
  20     /// offset of "center" relative to left-column/0-pos of staff
  21     virtual Offset center() const=0;
  22     virtual void set_default_dir();
  23 protected:
  24     virtual void do_pre_processing();
  25 };
  26
  27 #endif // DIRECTIONALSPANNER_HH
  28