rec_rect->set_outline_color (ARDOUR_UI::config()->get_canvasvar_TimeAxisFrame());
rec_rect->set_fill_color (fill_color);
rec_rect->lower_to_bottom();
rec_rect->set_outline_color (ARDOUR_UI::config()->get_canvasvar_TimeAxisFrame());
rec_rect->set_fill_color (fill_color);
rec_rect->lower_to_bottom();