2 score-element.hh -- declare Score_element
4 (c) 1996-1999 Han-Wen Nienhuys
11 #include "virtual-methods.hh"
12 #include "directed-graph.hh"
13 #include "graphical-element.hh"
14 #include "lily-guile.hh"
17 typedef void (Score_element::*Score_element_method_pointer) (void);
19 /** Both Spanner and Item are Score_element's. Most Score_element's depend
20 on other Score_element's, eg, Beam needs to know and set direction of
21 Stem. So the Beam has to be calculated *before* Stem. This is
22 accomplished with the dependencies fields of struct Score_element,
23 which are implemented in the Directed_graph_node class: all elements
24 form an acyclic graph.
31 Boolean (true iff defined)
33 break_helper_only -- if defined try to junk this after calcing breakpoints.
35 transparent -- do not calc. output
38 class Score_element : public virtual Graphical_element {
40 friend class Paper_score;
42 properties specific for this element. Destructor will not call
43 scm_unprotect, so as to allow more flexible GC arrangements. The
44 real alist is in (cdr element_property_alist_), to reduce the
45 need for more scm_protect calls.
48 SCM element_property_alist_;
49 Link_array<Score_element> dependency_arr_;
51 The lookup, determined by the font size. Cache this value.
55 Score_element *original_l_;
58 Administration: Where are we?. This is mainly used by Super_element and
59 Score_element::calcalute_dependencies ()
67 Paper_score *pscore_l_;
70 Score_element (Score_element const&);
71 virtual void print () const;
76 SCM get_elt_property (SCM sym) const;
77 void set_elt_property (SCM sym, SCM val);
78 SCM remove_elt_property (SCM key);
83 Paper_def *paper_l () const;
84 Lookup const *lookup_l () const;
86 virtual ~Score_element ();
87 void add_processing ();
89 void substitute_dependency (Score_element*,Score_element*);
90 void remove_dependency (Score_element*);
92 add a dependency. It may be the 0 pointer, in which case, it is ignored.
94 void add_dependency (Score_element*);
95 virtual Line_of_score * line_l () const;
96 bool linked_b () const;
97 VIRTUAL_COPY_CONS(Score_element);
100 Recursively track all dependencies of this Score_element. The
101 status_i_ field is used as a mark-field. It is marked with
102 #busy# during execution of this function, and marked with #final#
105 #funcptr# is the function to call to update this element.
107 void calculate_dependencies (int final, int busy, Score_element_method_pointer funcptr);
110 Score_element* dependency (int) const;
111 int dependency_size () const;
113 virtual void output_processing ();
114 virtual Interval do_height () const;
115 virtual Interval do_width () const;
117 /// do printing of derived info.
118 virtual void do_print () const;
119 /// generate the molecule
120 virtual Molecule* do_brew_molecule_p () const;
121 ///executed directly after the item is added to the Paper_score
122 virtual void do_add_processing ();
123 /// do calculations before determining horizontal spacing
124 virtual void do_pre_processing ();
126 /// generate rods & springs
127 virtual void do_space_processing ();
129 virtual void do_breakable_col_processing ();
130 /// do calculations after determining horizontal spacing
131 virtual void do_post_processing ();
133 virtual void do_substitute_element_pointer (Score_element * , Score_element *);
134 virtual void do_break_processing ();
135 virtual void handle_broken_dependencies ();
136 virtual void handle_prebroken_dependencies ();
137 virtual void handle_prebroken_dependents ();
138 virtual void handle_broken_dependents ();
139 virtual Link_array<Score_element> get_extra_dependencies () const;
141 static Interval dim_cache_callback (Dimension_cache*);
145 #endif // STAFFELEM_HH