How to 'notice/trap" when user types invalid value when JSpinner loses focus

问题

This is a follow on SSCCE to my previous question:

Previous Question

This JSpinner background goes RED when users types an invalid value and WHITE when valid. However, if value is invalid and user clicks away from this field the value reverts to whatever was previous.

I want to notice/trap when this happens and inform the user that his typed value is NOT being used, and disable any other functions that rely on this value.

How can I ammend the following code to accomplish that?

public static void main(String[] args) {
    // TODO Auto-generated method stub

    JFrame F = new JFrame();
    F.setVisible(true);
    JPanel p = new JPanel();


    final JSpinner spin2 = new JSpinner();
    spin2.setModel(new SpinnerNumberModel(10, 10, 100, 1));

    JComponent comp = spin2.getEditor();
    JFormattedTextField field = (JFormattedTextField) comp.getComponent(0);
    DefaultFormatter formatter = (DefaultFormatter) field.getFormatter();
    formatter.setCommitsOnValidEdit(true);


        ((JSpinner.DefaultEditor)Position.getEditor()).getTextField().addPropertyChangeListener(new PropertyChangeListener() {

            @Override
            public void propertyChange(PropertyChangeEvent evt) {
                //LOG.info("" + evt);
                if ("editValid".equals(evt.getPropertyName())) {
                    if (Boolean.FALSE.equals(evt.getNewValue())) {
                        SpinnerNumberModel model = (SpinnerNumberModel) Position.getModel();  

                        ((JSpinner.DefaultEditor)Position.getEditor()).getTextField().setBackground(Color.RED);
                        ((JSpinner.DefaultEditor)Position.getEditor()).getTextField().setToolTipText("Amount must be in range [ " + model.getMinimum() + " ... " + model.getMaximum() + " ] for this symbol");

                    }
                    else{
                        ((JSpinner.DefaultEditor)Position.getEditor()).getTextField().setBackground(Color.WHITE);
                    }
                }

            }
        });


    p.add(spin2);   


    F.add(p);
    F.pack();
    F.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


}

来源：https://stackoverflow.com/questions/20966239/how-to-notice-trap-when-user-types-invalid-value-when-jspinner-loses-focus

标签

java

jspinner