add_subwindow(threshold_title = new BC_Title(x, y, _("Threshold:")));
x += threshold_title->get_w() + margin;
threshold = new HistogramText(plugin, this, x, y);
add_subwindow(threshold_title = new BC_Title(x, y, _("Threshold:")));
x += threshold_title->get_w() + margin;
threshold = new HistogramText(plugin, this, x, y);