hdr/staff-walker.hh

   1 /*
   2   staff-walker.hh -- declare Staff_walker
   3
   4   (c) 1996,97 Han-Wen Nienhuys
   5 */
   6
   7 #ifndef STAFFWALKER_HH
   8 #define STAFFWALKER_HH
   9
  10 #include "proto.hh"
  11 #include "time-description.hh"
  12 #include "pcursor.hh"
  13
  14 /**
  15   manage run-time info when walking staffcolumns such as: key,
  16   meter, pending beams & slurs
  17   */
  18 struct Staff_walker : public PCursor<Staff_column*> {
  19     Staff * staff_l_;
  20     PScore * pscore_l_;
  21     Score_walker *score_walk_l_;
  22     Time_description time_;
  23     Rhythmic_grouping *default_grouping;
  24
  25     /* *************** */
  26
  27     Moment when() const;
  28     virtual ~Staff_walker();
  29     Staff_walker(Staff*, PScore*);
  30     void process() ;
  31
  32     void operator++(int);
  33     void allow_break();
  34
  35 protected:
  36     /// every time before ++ is called
  37     virtual void do_pre_move(){}
  38     /// every time after ++ is called
  39     virtual void do_post_move(){}
  40     virtual void process_requests()=0;
  41 private:
  42     void process_timing_reqs();
  43     Staff_walker(Staff_walker const&);
  44 };
  45
  46 #endif // STAFFWALKER_HH
  47