public void actionPerformed(ActionEvent event) {
final Object item = fieldMortgageChoices.getSelectedItem();
if (item instanceof Mortgage) {
final Mortgage mortgageTerms = (Mortgage) item;
// update the fields, but tell the document listener to
// not react to those changes since we don't want the
// combo box to then be changed in turn
ignoreDocumentChange = true;
fieldRate.setText(FMT_RATE.format(mortgageTerms.getRate()));
fieldTerm.setText(FMT_TERM.format(mortgageTerms.getTerm()));
ignoreDocumentChange = false;
}
}
