--- /dev/null
+/*
+ staff-gravs.cc -- implement Line_group_engraver
+
+ source file of the GNU LilyPond music typesetter
+
+ (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
+*/
+
+#include "staff-sym.hh"
+#include "line-group-grav.hh"
+#include "command-request.hh"
+#include "bar.hh"
+#include "debug.hh"
+#include "staffline.hh"
+
+
+Line_group_engraver::Line_group_engraver()
+{
+ staffline_p_ =0;
+}
+
+void
+Line_group_engraver::acknowledge_element(Score_elem_info elem)
+{
+ staffline_p_->add_element(elem.elem_l_);
+}
+
+
+void
+Line_group_engraver::do_removal_processing()
+{
+ staffline_p_->right_col_l_ = get_staff_info().command_pcol_l();
+ typeset_element(staffline_p_);
+ staffline_p_ = 0;
+}
+
+void
+Line_group_engraver::do_creation_processing()
+{
+ staffline_p_ = new Line_of_staff;
+ staffline_p_->left_col_l_ = get_staff_info().command_pcol_l();
+
+ // don't broadcast to self.
+ announce_element(Score_elem_info(staffline_p_,0));
+}
+
+
+
+IMPLEMENT_IS_TYPE_B1(Line_group_engraver,Engraver);
+ADD_THIS_ENGRAVER(Line_group_engraver);
+