Scrolling JPanel works but doesnt autoscroll based on focused subcomponents

Question

I need to create a JPanel with large amounts of JTextField components for data entry...
I want to put this in a JScrollpane so that the large amount of fields can fit on the screen.
I have this working, with scrollbars and all however,
When i tab through the textfields, the viewport does not autoscroll to show the active components
I was hoping there was an easy way to get the scrollpane to behave this way.
Any ideas?

Answer 1

Listen focus to force scrolling when a hidden textfield must be scrolled up to get visible.
Try this, I add 10 JTextField to a JPanel. JScollPane receive setViewPosition when focusEvent occur.
          JPanel spane = new JPanel(new GridLayout(0,1));
           jsp = new JScrollPane(spane);
           for (int i=0; i<10; i++) {
               JTextField field = new JTextField(20);
               spane.add(field);
               field.addFocusListener(new FocusAdapter() {
                   public void focusGained(FocusEvent fe) {                      
                       JTextField field = (JTextField)fe.getSource();
                       int last = jsp.getVerticalScrollBar().getValue() + jsp.getViewportBorderBounds().height;
                       if (field.getBounds().y > last) {
                         jsp.getViewport().setViewPosition(new Point(field.getBounds().x, field.getBounds().y));
           }This is working when scrolling down, you have to adapt for scrolling up.