public void initModel() {
if ( m_model != null )
m_model.removeChangeListener(m_lstnr);
// set up data / selection model
ValuedRangeModel model = null;
if ( TypeLib.isNumericType(m_type) && !m_ordinal ) {
Number min = (Number)DataLib.min(m_tuples, m_field).get(m_field);
Number max = (Number)DataLib.max(m_tuples, m_field).get(m_field);
model = new NumberRangeModel(min, max, min, max);
} else {