2 breathing_sign-engraver.cc -- implement Breathing_sign_engraver
4 Copyright (C) 1999 Michael Krause
6 written for the GNU LilyPond music typesetter
10 . Cancel any beams running through the breathing sign
11 ([e8 \breathe f e f] should become [e8] \breathe [f e f])
12 . Spacing is not yet completely pretty
16 #include "staff-symbol-referencer.hh"
17 #include "breathing-sign.hh"
18 #include "musical-request.hh"
19 #include "command-request.hh"
20 #include "engraver-group-engraver.hh"
22 #include "engraver.hh"
23 #include "command-request.hh"
25 class Breathing_sign_engraver : public Engraver {
27 TRANSLATOR_DECLARATIONS(Breathing_sign_engraver);
30 virtual bool try_music (Music *req_l);
31 virtual void create_grobs ();
32 virtual void stop_translation_timestep ();
33 virtual void start_translation_timestep ();
36 Breathing_sign_req * breathing_sign_req_l_;
37 Grob * breathing_sign_p_;
40 Breathing_sign_engraver::Breathing_sign_engraver ()
42 breathing_sign_p_ = 0;
43 breathing_sign_req_l_ = 0;
47 Breathing_sign_engraver::try_music (Music*r_l)
49 if (Breathing_sign_req * b= dynamic_cast <Breathing_sign_req *> (r_l))
51 breathing_sign_req_l_ = b;
59 Breathing_sign_engraver::create_grobs ()
61 if (breathing_sign_req_l_ && ! breathing_sign_p_)
63 SCM b = get_property ("BreathingSign");
64 breathing_sign_p_ = new Item (b);
66 announce_grob(breathing_sign_p_, breathing_sign_req_l_->self_scm());
67 breathing_sign_req_l_ = 0;
72 Breathing_sign_engraver::stop_translation_timestep ()
74 if (breathing_sign_p_)
76 typeset_grob (breathing_sign_p_);
77 breathing_sign_p_ = 0;
82 Breathing_sign_engraver::start_translation_timestep ()
84 breathing_sign_req_l_ = 0;
88 ENTER_DESCRIPTION(Breathing_sign_engraver,
90 /* creats*/ "BreathingSign",