+ Real lt
+ = me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"))
+ * robust_scm2double (me->get_property ("line-thickness"), 1.0);
+ Real th
+ = me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"))
+ * robust_scm2double (me->get_property ("thickness"), 1.0);