return timeField != null;
}
void createEditingControls() {
// create the text field for directly editing time
timeField = new DecimalField(0, 4, new TimeNumberFormat());
timeField.setMinimumSize(timeField.getPreferredSize());
timeField.setHorizontalAlignment(JTextField.RIGHT);
timeField.addFocusListener(this);
timeField.addActionListener(this);