source file of the GNU LilyPond music typesetter
- (c) 1998--2004 Jan Nieuwenhuizen <janneke@gnu.org>
+ (c) 1998--2007 Jan Nieuwenhuizen <janneke@gnu.org>
*/
#include <cctype>
+using namespace std;
+
+#include "engraver.hh"
-#include "note-column.hh"
-#include "bar-line.hh"
-#include "time-signature.hh"
-#include "engraver-group-engraver.hh"
#include "context.hh"
+#include "duration.hh"
+#include "grob-array.hh"
+#include "item.hh"
+#include "stream-event.hh"
+
+#include "translator.icc"
/**
- put stuff over or next to bars. Examples: bar numbers, marginal notes,
- rehearsal marks.
- */
+ put stuff over or next to bars. Examples: bar numbers, marginal notes,
+ rehearsal marks.
+*/
class Metronome_mark_engraver : public Engraver
{
public:
protected:
Item *text_;
Grob *bar_line_;
- Music *mark_ev_;
+
+ SCM last_duration_;
+ SCM last_count_;
- void create_items (Music*);
protected:
- virtual void stop_translation_timestep ();
- virtual bool try_music (Music *ev);
- virtual void process_music ();
+ virtual void derived_mark () const;
+ void stop_translation_timestep ();
+ void process_music ();
};
Metronome_mark_engraver::Metronome_mark_engraver ()
{
text_ = 0;
- mark_ev_ = 0;
+ last_duration_ = SCM_EOL;
+ last_count_ = SCM_EOL;
+}
+
+void
+Metronome_mark_engraver::derived_mark () const
+{
+ scm_gc_mark (last_count_);
+ scm_gc_mark (last_duration_);
}
-void
+void
Metronome_mark_engraver::stop_translation_timestep ()
{
if (text_)
{
- Grob*mc = unsmob_grob (get_property( "currentMusicalColumn"));
+ Grob *mc = unsmob_grob (get_property ("currentMusicalColumn"));
text_->set_parent (mc, X_AXIS);
- text_->set_property ("side-support-elements" , get_property ("stavesFound"));
-
text_ = 0;
}
- mark_ev_ = 0;
-}
-
-
-void
-Metronome_mark_engraver::create_items (Music *rq)
-{
- if (text_)
- return;
-
- text_ = make_item ("MetronomeMark", rq->self_scm () );
-
-}
-
-
-bool
-Metronome_mark_engraver::try_music (Music* r)
-{
- mark_ev_ = r;
- return true;
}
void
Metronome_mark_engraver::process_music ()
{
- if (mark_ev_)
+ SCM count = get_property ("tempoUnitCount");
+ SCM duration = get_property ("tempoUnitDuration");
+
+ if (unsmob_duration (duration)
+ && scm_is_number (count)
+ && !(ly_is_equal (count, last_count_)
+ && ly_is_equal (duration, last_duration_)))
{
- create_items (mark_ev_);
+ text_ = make_item ("MetronomeMark", SCM_EOL);
SCM proc = get_property ("metronomeMarkFormatter");
- SCM result = scm_call_2 (proc, mark_ev_->self_scm (),
- context ()->self_scm ());
-
+ SCM result = scm_call_3 (proc,
+ duration,
+ count,
+ context ()->self_scm ());
+
text_->set_property ("text", result);
}
+
+ last_duration_ = duration;
+ last_count_ = count;
}
ADD_TRANSLATOR (Metronome_mark_engraver,
-/* descr */ "Engrave metro nome marking. This delegates the formatting work "
- "to the function in the metronomeMarkFormatter property. "
- "The mark is put over all staves. "
- "The staves are taken from the @code{stavesFound} property, "
- "which is maintained by @code{@ref{Staff_collecting_engraver}}. "
-
- ,
-/* creats*/ "MetronomeMark",
-/* accepts */ "metronome-change-event",
- /* acks */ "",
-/* reads */ "stavesFound metronomeMarkFormatter",
-/* write */ "");
+ /* doc */ "Engrave metro nome marking. This delegates the formatting work "
+ "to the function in the metronomeMarkFormatter property. "
+ "The mark is put over all staves. "
+ "The staves are taken from the @code{stavesFound} property, "
+ "which is maintained by @code{@ref{Staff_collecting_engraver}}. ",
+ /* create */ "MetronomeMark",
+
+ /* read */
+ "stavesFound "
+ "metronomeMarkFormatter "
+ "tempoUnitDuration "
+ "tempoUnitCount "
+ ,
+
+ /* write */ "");