/*
beam.hh -- part of GNU LilyPond
- (c) 1996--1999 Han-Wen Nienhuys
+ (c) 1996--2001 Han-Wen Nienhuys
*/
#ifndef BEAM_HH
#define BEAM_HH
#include "lily-proto.hh"
-#include "directional-spanner.hh"
+#include "lily-guile.hh"
-/** a beam connects multiple stems.
- Beam adjusts the stems its owns to make sure that they reach the
- beam and that point in the correct direction (urg?)
-
-elt property:
-
-damping: amount of beam slope damping. (int)
-
-should beam slope be damped? 0: no, 1: yes, 100000: horizontal beams
-
-slope_quantisation: 'none, 'normal or 'traditional
-
-*/
-class Beam : public Directional_spanner
+class Beam
{
public:
+ static int visible_stem_count (Grob*);
+ static Item* first_visible_stem (Grob*);
+ static Item* last_visible_stem (Grob*);
+ static bool has_interface (Grob*);
+ DECLARE_SCHEME_CALLBACK (rest_collision_callback, (SCM element, SCM axis));
+ Beam (SCM);
+ static void add_stem (Grob*,Grob*);
+ static void set_beaming (Grob*,Beaming_info_list *);
+ static void set_stemlens (Grob*);
+ static int get_multiplicity (Grob*me);
+ DECLARE_SCHEME_CALLBACK (brew_molecule, (SCM ));
+ DECLARE_SCHEME_CALLBACK (before_line_breaking, (SCM ));
+ DECLARE_SCHEME_CALLBACK (after_line_breaking, (SCM ));
+
+ /*
+ y-dy callbacks
+ */
+ DECLARE_SCHEME_CALLBACK (least_squares, (SCM));
+ DECLARE_SCHEME_CALLBACK (cancel_suspect_slope, (SCM));
+ DECLARE_SCHEME_CALLBACK (slope_damping, (SCM));
+ DECLARE_SCHEME_CALLBACK (quantise_dy, (SCM));
+ DECLARE_SCHEME_CALLBACK (user_override, (SCM));
+ DECLARE_SCHEME_CALLBACK (do_quantise_y, (SCM));
+
+ static Molecule stem_beams (Grob*,Item *here, Item *next, Item *prev);
- int stem_count () const;
- Stem* stem (int) const;
- Stem* stem_top () const;
- int visible_stem_count () const;
- Stem* first_visible_stem () const;
- Stem* last_visible_stem () const;
-
- Beam ();
- void add_stem (Stem*);
- void set_grouping (Rhythmic_grouping def, Rhythmic_grouping current);
- void set_beaming (Beaming_info_list *);
- void set_stemlens ();
- VIRTUAL_COPY_CONS(Score_element);
-
- int get_multiplicity () const;
-
-protected:
-
- virtual void do_pre_processing ();
- virtual void do_post_processing ();
- virtual Molecule*do_brew_molecule_p () const;
-
- Molecule stem_beams (Stem *here, Stem *next, Stem *prev) const;
private:
- Direction get_default_dir () const;
- void set_stem_directions ();
- void auto_knees ();
- bool auto_knee (String gap_str, bool interstaff_b);
- void set_stem_shorten ();
- void calc_position_and_height (Real* y, Real* dy) const;
- bool suspect_slope_b (Real y, Real dy) const;
- Real calc_slope_damping_f (Real dy) const;
- Real calc_stem_y_f (Stem* s, Real y, Real dy) const;
- Real check_stem_length_f (Real y, Real dy) const;
- void set_stem_length (Real y, Real dy);
- Real quantise_dy_f (Real dy) const;
- Real quantise_y_f (Real y, Real dy, int quant_dir);
- int forced_stem_count () const;
+ static Direction get_default_dir (Grob*);
+ static void set_stem_directions (Grob*);
+ static void consider_auto_knees (Grob*);
+ static void set_stem_shorten (Grob*);
+ static Real calc_stem_y_f (Grob*, Item* s, Real y, Real dy);
+ static Real check_stem_length_f (Grob*, Real y, Real dy);
+ static void set_stem_lengths (Grob*);
+ static Real quantise_y_f (Grob*, Real y, Real dy, int quant_dir);
+ static int forced_stem_count (Grob*);
};
-#endif // BEAM_HH
+#endif /* BEAM_HH */