+ Grob *me = unsmob_grob (smob);
+ Real staff_space = Staff_symbol_referencer::staff_space (me);
+ Real staff_size;
+ Real thickness = Staff_symbol_referencer::line_thickness (me);
+ thickness *= robust_scm2double (me->get_property ("thickness"), 1.0);
+
+ if (Staff_symbol_referencer::get_staff_symbol (me))
+ staff_size = (Staff_symbol_referencer::line_count (me) - 1) * staff_space;
+ else
+ staff_size = 0.0;
+
+ Real blotdiameter = me->layout ()->get_dimension (ly_symbol2scm ("blot-diameter"));
+
+ /*
+ * Draw a vertical line that is vertically centered in the staff
+ * (just like a bar). The height of this line should be a little
+ * more than half the size of the staff, such that the endings of
+ * the line are in the middle of a staff space.
+ */
+ int lines = Staff_symbol_referencer::line_count (me);
+ int height = lines / 2; // little more than half of staff size
+ if ((lines & 1) != (height & 1))
+ height++; // ensure endings are centered in staff space