source file of the GNU LilyPond music typesetter
- (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include "time-signature.hh"
#include "command-request.hh"
#include "engraver.hh"
-#include "timing-engraver.hh"
+
#include "engraver-group-engraver.hh"
*/
class Time_signature_engraver : public Engraver {
protected:
- virtual void do_process_music();
- virtual void do_pre_move_processing();
+ virtual void stop_translation_timestep ();
+ virtual void create_grobs ();
public:
- VIRTUAL_COPY_CONS(Translator);
+ VIRTUAL_COPY_CONS (Translator);
Item * time_signature_p_;
-
- Time_signature_engraver();
+ SCM last_time_fraction_;
+ Time_signature_engraver ();
};
-Time_signature_engraver::Time_signature_engraver()
+Time_signature_engraver::Time_signature_engraver ()
{
time_signature_p_ =0;
+ last_time_fraction_ = SCM_BOOL_F;
}
void
-Time_signature_engraver::do_process_music()
+Time_signature_engraver::create_grobs ()
{
/*
- UGH.
- this should use properties.
- */
- Translator * result =
- daddy_grav_l()->get_simple_translator ("Timing_engraver"); // ugh
-
- if (!result)
+ not rigorously safe, since the value might get GC'd and
+ reallocated in the same spot */
+ SCM fr= get_property ("timeSignatureFraction");
+ if (!time_signature_p_ && last_time_fraction_ != fr)
{
- warning (_ ("lost in time:"));
- warning (_f ("can't find: `%s'", " Timing_translator"));
- return ;
- }
-
- Timing_engraver * timing_grav_l= dynamic_cast<Timing_engraver *> (result);
-
- Time_signature_change_req *req = timing_grav_l->time_signature_req_l();
- if (req)
- {
- time_signature_p_ = new Item (get_property ("basicTimeSignatureProperties"));
- time_signature_p_->set_elt_property ("fraction",
- gh_cons (gh_int2scm (req->beats_i_),
- gh_int2scm (req->one_beat_i_)));
- }
+ last_time_fraction_ = fr;
+ time_signature_p_ = new Item (get_property ("TimeSignature"));
+ time_signature_p_->set_grob_property ("fraction",fr);
+ if (time_signature_p_)
+ announce_grob (time_signature_p_, 0);
+ }
- if (time_signature_p_)
- announce_element (time_signature_p_, req);
}
+
+
void
-Time_signature_engraver::do_pre_move_processing()
+Time_signature_engraver::stop_translation_timestep ()
{
if (time_signature_p_)
{
- typeset_element (time_signature_p_);
+ typeset_grob (time_signature_p_);
time_signature_p_ =0;
}
}
-ADD_THIS_TRANSLATOR(Time_signature_engraver);
+ADD_THIS_TRANSLATOR (Time_signature_engraver);