hdr/beam.hh

   1 /*
   2   beam.hh -- part of LilyPond
   3
   4   (c) 1996,97 Han-Wen Nienhuys
   5 */
   6
   7 #ifndef BEAM_HH
   8 #define BEAM_HH
   9 #include "proto.hh"
  10 #include "directional-spanner.hh"
  11 #include "plist.hh"
  12
  13 /** a beam connects multiple stems Beam adjusts the stems its owns to
  14   make sure that they reach the beam and that point in the correct
  15   direction */
  16 struct Beam:  public Directional_spanner {
  17     PointerList<Stem*> stems;
  18     /// the slope of the beam in posns / point (dimension)
  19     Real slope;
  20
  21     /// position of leftmost end of beam
  22     Real left_pos;
  23
  24
  25     /* *************** */
  26 NAME_MEMBERS(Beam);
  27
  28     virtual Interval width()const;
  29     Offset center() const;
  30     Spanner *do_break_at(PCol *,  PCol *) const;
  31     Beam();
  32     void add(Stem*);
  33
  34
  35     void set_default_dir();
  36     void do_pre_processing();
  37     void do_post_processing();
  38
  39     void do_print() const;
  40     void set_grouping(Rhythmic_grouping def, Rhythmic_grouping current);
  41     void set_stemlens();
  42     ~Beam();
  43
  44 private:
  45     Molecule stem_beams(Stem *here, Stem *next, Stem *prev)const;
  46     void solve_slope();
  47     Molecule*brew_molecule_p()const;
  48 };
  49
  50 #endif // BEAM_HH
  51