source file of the GNU LilyPond music typesetter
- (c) 1998--2006 Jan Nieuwenhuizen <janneke@gnu.org>
+ (c) 1998--2007 Jan Nieuwenhuizen <janneke@gnu.org>
*/
#include <cctype>
#include "engraver.hh"
-#include "note-column.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,
protected:
Item *text_;
Grob *bar_line_;
- Music *mark_ev_;
- void create_items (Music *);
+ SCM last_duration_;
+ SCM last_count_;
+
protected:
+ virtual void derived_mark () const;
void stop_translation_timestep ();
- virtual bool try_music (Music *ev);
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
text_->set_parent (mc, X_AXIS);
text_->set_object ("side-support-elements",
grob_list_to_grob_array (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 (),
+ SCM result = scm_call_3 (proc,
+ duration,
+ count,
context ()->self_scm ());
text_->set_property ("text", result);
}
-}
-#include "translator.icc"
+ last_duration_ = duration;
+ last_count_ = count;
+}
ADD_TRANSLATOR (Metronome_mark_engraver,
- /* 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",
- /* accept */ "metronome-change-event",
- /* read */ "stavesFound metronomeMarkFormatter",
- /* write */ "");
+ /* doc */
+ "Engrave metronome marking. This delegates the formatting"
+ " work to the function in the @code{metronomeMarkFormatter}"
+ " property. The mark is put over all staves. The staves are"
+ " taken from the @code{stavesFound} property, which is"
+ " maintained by @ref{Staff_collecting_engraver}.",
+
+ /* create */
+ "MetronomeMark ",
+
+ /* read */
+ "stavesFound "
+ "metronomeMarkFormatter "
+ "tempoUnitDuration "
+ "tempoUnitCount ",
+
+ /* write */
+ ""
+ );