source file of the GNU LilyPond music typesetter
- (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include "staff-symbol-referencer.hh"
#include "translator-group.hh"
#include "engraver.hh"
+
+
/**
Make stems upon receiving noteheads.
*/
class Stem_engraver : public Engraver
{
-
-public:
- VIRTUAL_COPY_CONS (Translator);
- Stem_engraver();
-
+ TRANSLATOR_DECLARATIONS(Stem_engraver);
protected:
- virtual void acknowledge_element (Score_element_info);
- virtual void do_pre_move_processing ();
- virtual bool do_try_music (Music*);
+ virtual void acknowledge_grob (Grob_info);
+ virtual void stop_translation_timestep ();
+ virtual bool try_music (Music*);
private:
- Score_element *stem_p_;
- Score_element *tremolo_p_;
- Rhythmic_req *rhythmic_req_l_;
- Tremolo_req* tremolo_req_l_;
+ Grob *stem_;
+ Grob *tremolo_;
+ Rhythmic_req *rhythmic_req_;
+ Tremolo_req* tremolo_req_;
};
-ADD_THIS_TRANSLATOR (Stem_engraver);
-
Stem_engraver::Stem_engraver ()
{
- tremolo_req_l_ = 0;
- stem_p_ = 0;
- tremolo_p_ = 0;
- rhythmic_req_l_ =0;
+ tremolo_req_ = 0;
+ stem_ = 0;
+ tremolo_ = 0;
+ rhythmic_req_ =0;
}
void
-Stem_engraver::acknowledge_element(Score_element_info i)
+Stem_engraver::acknowledge_grob (Grob_info i)
{
- Score_element* h = i.elem_l_;
+ Grob* h = i.grob_;
if (Rhythmic_head::has_interface (h))
{
- if (Rhythmic_head::stem_l (h))
+ if (Rhythmic_head::get_stem (h))
return;
+
+ /* Reverted to the old method so chord tremolos work again. /MB
+ */
+ int duration_log = 0;
+ Rhythmic_req *rhythmic_req = dynamic_cast <Rhythmic_req *> (i.music_cause ());
+ if (rhythmic_req)
+ duration_log = unsmob_duration (rhythmic_req->get_mus_property ("duration"))-> duration_log ();
- Rhythmic_req * r = dynamic_cast <Rhythmic_req *> (i.req_l_);
- int duration_log = r->duration_.durlog_i_;
- if (!stem_p_)
+ if (!stem_)
{
- stem_p_ = new Item (get_property ("Stem"));
- Stem::set_interface (stem_p_);
- Staff_symbol_referencer::set_interface(stem_p_);
+ stem_ = new Item (get_property ("Stem"));
-
- stem_p_->set_elt_property ("duration-log", gh_int2scm (duration_log));
+ stem_->set_grob_property ("duration-log", gh_int2scm (duration_log));
- if (tremolo_req_l_)
+ if (tremolo_req_)
{
/*
Stem tremolo is never applied to a note by default,
the first and last (quarter) note bothe get one tremolo flag.
*/
- int requested_type = gh_scm2int (tremolo_req_l_->get_mus_property ("tremolo-type"));
+ int requested_type = gh_scm2int (tremolo_req_->get_mus_property ("tremolo-type"));
SCM f = get_property ("tremoloFlags");
if (!requested_type && gh_number_p (f))
requested_type = gh_scm2int (f);
else
- daddy_trans_l_->set_property ("tremoloFlags", gh_int2scm (requested_type));
+ daddy_trans_->set_property ("tremoloFlags", gh_int2scm (requested_type));
if (requested_type)
{
- tremolo_p_ = new Item (get_property ("StemTremolo"));
- Stem_tremolo::set_interface (tremolo_p_);
+ tremolo_ = new Item (get_property ("StemTremolo"));
+ announce_grob(tremolo_, tremolo_req_->self_scm());
- announce_element (tremolo_p_, tremolo_req_l_);
/*
The number of tremolo flags is the number of flags of
the tremolo-type minus the number of flags of the note
- (duration_log > 2 ? duration_log - 2 : 0);
if (tremolo_flags < 0)
tremolo_flags = 0;
- tremolo_p_->set_elt_property ("tremolo-flags",
+ tremolo_->set_grob_property ("flag-count",
gh_int2scm (tremolo_flags));
+ tremolo_->set_parent (stem_, X_AXIS);
}
}
- announce_element (stem_p_, r);
+
+ /*
+ We announce the cause of the head as cause of the stem.
+ The stem needs a rhythmic structure to fit it into a beam. */
+ announce_grob(stem_, i.music_cause ()->self_scm());
}
- if (Stem::flag_i (stem_p_) != duration_log)
+ if (Stem::duration_log (stem_) != duration_log)
{
- r->origin ()->warning (_f ("Adding note head to incompatible stem (type = %d)", 1 << Stem::flag_i (stem_p_)));
+ i.music_cause ()->origin ()->warning (_f ("Adding note head to incompatible stem (type = %d)", 1 << Stem::duration_log (stem_)));
}
- Stem::add_head (stem_p_,h);
+ Stem::add_head (stem_,h);
}
}
void
-Stem_engraver::do_pre_move_processing()
+Stem_engraver::stop_translation_timestep ()
{
- if (tremolo_p_)
+ if (tremolo_)
{
- Stem_tremolo::set_stem (tremolo_p_, stem_p_);
- typeset_element (tremolo_p_);
- tremolo_p_ = 0;
+ Stem_tremolo::set_stem (tremolo_, stem_);
+ typeset_grob (tremolo_);
+ tremolo_ = 0;
}
- if (stem_p_)
+ if (stem_)
{
SCM prop = get_property ("stemLeftBeamCount");
- if (gh_number_p(prop))
+ if (gh_number_p (prop))
{
- Stem::set_beaming (stem_p_,gh_scm2int (prop),LEFT);
- daddy_trans_l_->set_property ("stemLeftBeamCount", SCM_UNDEFINED);
+ Stem::set_beaming (stem_,gh_scm2int (prop),LEFT);
+ daddy_trans_->unset_property (ly_symbol2scm ("stemLeftBeamCount"));
}
prop = get_property ("stemRightBeamCount");
- if (gh_number_p(prop))
+ if (gh_number_p (prop))
{
- Stem::set_beaming (stem_p_,gh_scm2int (prop), RIGHT);
- daddy_trans_l_->set_property ("stemRightBeamCount", SCM_UNDEFINED);
+ Stem::set_beaming (stem_,gh_scm2int (prop), RIGHT);
+ daddy_trans_->unset_property (ly_symbol2scm ("stemRightBeamCount"));
}
// UGH. Should mark non-forced instead.
-
/*
aargh: I don't get it. direction is being set (and then set
to forced), if we have a Chord_tremolo.
*/
- SCM dir = stem_p_->get_elt_property ("direction");
- if (gh_number_p (dir) && to_dir(dir))
+
+ /*
+ Why the separate check for forced directions? --hwn.
+
+ (docme)
+ */
+ SCM dir = stem_->get_grob_property ("direction");
+ if (gh_number_p (dir) && to_dir (dir))
{
- stem_p_->set_elt_property ("dir-forced", SCM_BOOL_T);
+ stem_->set_grob_property ("dir-forced", SCM_BOOL_T);
}
- typeset_element(stem_p_);
- stem_p_ = 0;
+ typeset_grob (stem_);
+ stem_ = 0;
}
- tremolo_req_l_ = 0;
+ tremolo_req_ = 0;
}
bool
-Stem_engraver::do_try_music (Music* r)
+Stem_engraver::try_music (Music* r)
{
if (Tremolo_req* a = dynamic_cast <Tremolo_req *> (r))
{
- tremolo_req_l_ = a;
+ tremolo_req_ = a;
return true;
}
return false;
}
+ENTER_DESCRIPTION(Stem_engraver,
+/* descr */ "Create stems and single-stem tremolos. It also works together with
+the beam engraver for overriding beaming.",
+/* creats*/ "Stem StemTremolo",
+/* acks */ "rhythmic-head-interface",
+/* reads */ "tremoloFlags stemLeftBeamCount stemRightBeamCount",
+/* write */ "");
projects / lilypond.git / blobdiff