source file of the GNU LilyPond music typesetter
- (c) 2004--2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ (c) 2004--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#include "pointer-group-interface.hh"
class Ledger_line_engraver : public Engraver
{
Spanner *span_;
-
+ vector<Grob*> ledgered_grobs_;
+
public:
TRANSLATOR_DECLARATIONS (Ledger_line_engraver);
protected:
virtual void finalize ();
- PRECOMPUTED_VIRTUAL void process_music ();
- virtual void acknowledge_grob (Grob_info);
+ void process_music ();
+
+ DECLARE_ACKNOWLEDGER (ledgered);
+ DECLARE_ACKNOWLEDGER (staff_symbol);
void start_spanner ();
void stop_spanner ();
+ void stop_translation_timestep ();
};
Ledger_line_engraver::Ledger_line_engraver ()
Ledger_line_engraver::start_spanner ()
{
assert (!span_);
- span_ = make_spanner ("LedgerLineSpanner", SCM_EOL);
+ span_ = make_spanner ("LedgerLineSpanner", SCM_EOL);
span_->set_bound (LEFT, unsmob_grob (get_property ("currentCommandColumn")));
}
+void
+Ledger_line_engraver::stop_translation_timestep ()
+{
+ if (span_)
+ {
+ for (vsize i = 0; i < ledgered_grobs_.size (); i++)
+ {
+ if (!to_boolean (ledgered_grobs_[i]->get_property ("no-ledgers")))
+ Pointer_group_interface::add_grob (span_,
+ ly_symbol2scm ("note-heads"),
+ ledgered_grobs_[i]);
+ }
+ }
+
+ ledgered_grobs_.clear ();
+}
+
void
Ledger_line_engraver::process_music ()
{
+ /*
+ Need to do this, otherwise the first note might miss ledgers.
+ */
if (!span_)
start_spanner ();
}
void
Ledger_line_engraver::finalize ()
{
- stop_spanner();
+ stop_spanner ();
}
void
if (span_)
{
span_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
+ Pointer_group_interface::set_ordered (span_, ly_symbol2scm ("elements"), false);
span_ = 0;
}
}
void
-Ledger_line_engraver::acknowledge_grob (Grob_info s)
+Ledger_line_engraver::acknowledge_staff_symbol (Grob_info s)
{
- if (Staff_symbol::has_interface (s.grob ()))
- {
- Spanner *sym = dynamic_cast<Spanner*> (s.grob ());
+ Spanner *sym = dynamic_cast<Spanner *> (s.grob ());
- if (!span_
- || span_->get_bound (LEFT) != sym->get_bound (LEFT))
- {
- stop_spanner ();
- start_spanner ();
- }
- }
- else if (span_)
+ if (!span_
+ || (span_->get_bound (LEFT) != sym->get_bound (LEFT)))
{
- if (!to_boolean (s.grob ()->get_property ("no-ledgers")))
- Pointer_group_interface::add_grob (span_, ly_symbol2scm ("note-heads"),
- s.grob ());
+ stop_spanner ();
+ start_spanner ();
}
}
+void
+Ledger_line_engraver::acknowledge_ledgered (Grob_info s)
+{
+ ledgered_grobs_.push_back (s.grob ());
+}
+
#include "translator.icc"
+ADD_ACKNOWLEDGER (Ledger_line_engraver, ledgered);
+ADD_ACKNOWLEDGER (Ledger_line_engraver, staff_symbol);
ADD_TRANSLATOR (Ledger_line_engraver,
"Creates the spanner to draw ledger lines, and notices objects that need ledger lines",
- /* creats*/ "LedgerLineSpanner",
- /* accepts */ "",
- /* acks */ "staff-symbol-interface ledgered-interface", // ledgered-interface?
- /* reads */ "",
+ /* create */ "LedgerLineSpanner",
+ /* read */ "",
/* write */ "")