/*
- mark-engraver.cc -- implement Metronome_mark_engraver
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1998--2010 Jan Nieuwenhuizen <janneke@gnu.org>
- (c) 1998--2004 Jan Nieuwenhuizen <janneke@gnu.org>
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
#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 "text-interface.hh"
+
+#include "translator.icc"
-/**
- put stuff over or next to bars. Examples: bar numbers, marginal notes,
- rehearsal marks.
- */
class Metronome_mark_engraver : public Engraver
{
public:
TRANSLATOR_DECLARATIONS (Metronome_mark_engraver);
+
protected:
Item *text_;
- Grob *bar_line_;
- Music *mark_ev_;
+ Grob *support_;
+
+ SCM last_duration_;
+ SCM last_count_;
+ SCM last_text_;
+
+ DECLARE_ACKNOWLEDGER (break_aligned);
- 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;
+ support_ = 0;
+ last_duration_ = SCM_EOL;
+ last_count_ = SCM_EOL;
+ last_text_ = SCM_EOL;
}
-void
-Metronome_mark_engraver::stop_translation_timestep ()
+void
+Metronome_mark_engraver::derived_mark () const
{
- if (text_)
- {
- 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;
+ scm_gc_mark (last_count_);
+ scm_gc_mark (last_duration_);
+ scm_gc_mark (last_text_);
}
-
void
-Metronome_mark_engraver::create_items (Music *rq)
+Metronome_mark_engraver::acknowledge_break_aligned (Grob_info inf)
{
- if (text_)
- return;
-
- text_ = make_item ("MetronomeMark", rq->self_scm () );
-
+ Grob *s = inf.grob ();
+ if (text_
+ && (s->get_property_data ("break-align-symbol")
+ == text_->get_property_data ("break-align-symbol")))
+ {
+ support_ = s;
+ }
}
-
-bool
-Metronome_mark_engraver::try_music (Music* r)
+void
+Metronome_mark_engraver::stop_translation_timestep ()
{
- mark_ev_ = r;
- return true;
+ if (text_)
+ {
+ if (!support_)
+ {
+ /*
+ Gardner Read "Music Notation", p.278
+
+ Align the metronome mark over the time signature (or the
+ first notational element of the measure if no time
+ signature is present in that measure).
+ */
+ Grob *mc = unsmob_grob (get_property ("currentMusicalColumn"));
+ text_->set_parent (mc, X_AXIS);
+ }
+ text_->set_object ("side-support-elements",
+ grob_list_to_grob_array (get_property ("stavesFound")));
+ text_ = 0;
+ support_ = 0;
+ }
}
void
Metronome_mark_engraver::process_music ()
{
- if (mark_ev_)
+ SCM count = get_property ("tempoUnitCount");
+ SCM duration = get_property ("tempoUnitDuration");
+ SCM text = get_property ("tempoText");
+
+ if ( ( (unsmob_duration (duration) && scm_is_number (count))
+ || Text_interface::is_markup (text) )
+ && !(ly_is_equal (count, last_count_)
+ && ly_is_equal (duration, last_duration_)
+ && ly_is_equal (text, last_text_)))
{
- 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_4 (proc,
+ text,
+ duration,
+ count,
+ context ()->self_scm ());
+
text_->set_property ("text", result);
}
+
+ last_duration_ = duration;
+ last_count_ = count;
+ last_text_ = text;
}
-ENTER_DESCRIPTION (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 */ "");
+
+
+ADD_ACKNOWLEDGER (Metronome_mark_engraver, break_aligned);
+
+ADD_TRANSLATOR (Metronome_mark_engraver,
+ /* 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 "
+ "tempoText "
+ "tempoHideNote ",
+
+ /* write */
+ ""
+ );
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