Why does insertUpdate get called in my DocumentListener when I change focus? (Java Swing)?

You must have something looking at the focus or you think it is firing and it is not I took your code and made a complete example and it does not have the problem you describe JFrame frame = new JFrame(); final JTextField numPlotRowsJTextField = new JTextField(3); numPlotRowsJTextField.getDocument(). AddDocumentListener(new DocumentListener() { @Override public void changedUpdate(DocumentEvent e) { } @Override public void insertUpdate(DocumentEvent e) { numPlotRowsJTextField. SetBackground(Color.

Cyan); } @Override public void removeUpdate(DocumentEvent e) { } }); frame. SetDefaultCloseOperation(JFrame. EXIT_ON_CLOSE); frame.

SetSize(100, 100); frame.getContentPane(). SetLayout(new FlowLayout()); frame.getContentPane(). Add(new JTextField(2)); frame.getContentPane().

Add(numPlotRowsJTextField); frame. SetVisible(true).

You must have something looking at the focus or you think it is firing and it is not. I took your code and made a complete example and it does not have the problem you describe. JFrame frame = new JFrame(); final JTextField numPlotRowsJTextField = new JTextField(3); numPlotRowsJTextField.getDocument().

AddDocumentListener(new DocumentListener() { @Override public void changedUpdate(DocumentEvent e) { } @Override public void insertUpdate(DocumentEvent e) { numPlotRowsJTextField. SetBackground(Color. Cyan); } @Override public void removeUpdate(DocumentEvent e) { } }); frame.

SetDefaultCloseOperation(JFrame. EXIT_ON_CLOSE); frame. SetSize(100, 100); frame.getContentPane().

SetLayout(new FlowLayout()); frame.getContentPane(). Add(new JTextField(2)); frame.getContentPane(). Add(numPlotRowsJTextField); frame.

SetVisible(true).

I think JGoodies Binding is messing me up somehow. It must be causing the DocumentListener to fire insertUpdate even when I just change focus. It probably has to do with the face that I am using JGoodies buffered input and a trigger which allows me to reset my input easily.

Any JGoodies binding experts out there? – Bluebomber357 Jan 6 at 15:49.

Does it actually contain a string that has changed. Or is it just an event with a 0 length string. If it is the latter then maybe you can just ignore that case.

I figured it out. It 100% had to do with JGoodies Binding. This code works: ValueModel valueModelNumberPlotRowsJTextField = adapter.

GetBufferedModel("numberOfPlotRows"); valueModelNumberPlotRowsJTextField. AddValueChangeListener(new PropertyChangeListener() { @Override public void propertyChange(PropertyChangeEvent evt) { numPlotRowsJTextField. SetBackground(Color.

Cyan); } }); numPlotRowsJTextField = BasicComponentFactory. CreateIntegerField(valueModelNumberPlotRowsJTextField); Since I am using JGoodies Binding, I have a ValueModel backing my JTextField. The listener has to be set there and not on the JTextField.

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