2 engraver.hh -- declare Engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1996, 1997--1998 Han-Wen Nienhuys <hanwen@stack.nl>
13 #include "lily-proto.hh"
16 #include "score-elem-info.hh"
17 #include "staff-info.hh"
18 #include "translator.hh"
22 a struct which processes requests, and creates the #Score_elem#s.
23 It may use derived classes. Hungarian postfix: grav
26 class Engraver : public virtual Translator {
28 friend class Engraver_group_engraver;
34 Paper_def * paper() const;
36 Invoke walker method to typeset element. Default: pass on to daddy.
38 virtual void typeset_element (Score_elem*elem_p);
41 take note of item/spanner
42 put item in spanner. Adjust local key; etc.
44 Default: ignore the info
46 virtual void acknowledge_element (Score_elem_info) {}
48 /** Do things with stuff found in acknowledge_element. Ugh. Should
49 be looped with acknowledge_element.
52 virtual void process_acknowledged () {}
54 Announce element. Default: pass on to daddy. Utility
56 virtual void announce_element (Score_elem_info);
59 Get information on the staff. Default: ask daddy.
61 virtual Staff_info get_staff_info() const;
62 virtual void fill_staff_info (Staff_info&);
65 TRANSLATOR_CLONE(Engraver);
66 Engraver_group_engraver * daddy_grav_l() const;
72 DECLARE_MY_RUNTIME_TYPEINFO;
73 virtual Engraver * engraver_l () { return this; }