+ if (_divide_height >= 0.0) {
+
+ cr->set_line_width (1.0);
+
+ Gtkmm2ext::set_source_rgba (cr, _divider_color_top);
+ cr->move_to (self.x0, self.y0 + _divide_height-1.0+0.5);
+ cr->line_to (self.x1, self.y0 + _divide_height-1.0+0.5);
+ cr->stroke ();
+
+ Gtkmm2ext::set_source_rgba (cr, _divider_color_bottom);
+ cr->move_to (self.x0, self.y0 + _divide_height+0.5);
+ cr->line_to (self.x1, self.y0 + _divide_height+0.5);
+ cr->stroke ();
+
+
+ }
+