2 directional-spanner.hh -- part of GNU LilyPond
4 (c) 1996,97 Han-Wen Nienhuys
7 #ifndef DIRECTIONALSPANNER_HH
8 #define DIRECTIONALSPANNER_HH
12 /// a spanner which can be pointing "up" or "down"
13 class Directional_spanner : public Spanner{
16 /// -1 below heads, +1 above heads.
18 Directional_spanner();
20 /// offset of "center" relative to left-column/0-pos of staff
21 virtual Offset center() const=0;
22 virtual void set_default_dir();
24 virtual void do_pre_processing();
27 #endif // DIRECTIONALSPANNER_HH