Resizing a JList with variable row heights, not updating the "picture"

Question

Firstly I would like to apologize for posting this Swing question here, but I was unable to find the Swing category, if someone could direct me to that I would be most grateful.
Ok, so in abstract what I am trying to do is have a JList with resizable rows to act as a row header for a JTable (exactly like the row headers in OO Calc or MS Excel).
What I have is a RowHeaderRenderer:
public class RowHeaderRenderer extends JLabel implements ListCellRendererand it has a private member:
private Vector<Integer>        _rowHeights            = new Vector<Integer>();which contains a list of all the variable row heights.
Then there is my getListCellRendererComponent method:
    public Component getListCellRendererComponent(    JList         list,
                                                      Object        value,
                                                      int           index,
                                                      boolean       isSelected,
                                                      boolean       cellHasFocus)
        // Make sure the value is not null
        if(value == null)
            this.setText("");
        else
            this.setText(value.toString());
        // This is where height of the row is actually changed
        // This method is fed values from the _rowHeights vector
        this.setPreferredSize(new Dimension(this.getPreferredSize().width, _rowHeights.elementAt(index)));
        return this;
    }And then I have a row header:
public class RowHeader extends JList implements TableModelListener, MouseListener, MouseMotionListenerand you may be interested in its constructor:
    public RowHeader(JTable table)
        _table = table;
        _rowHeaderRenderer = new RowHeaderRenderer(_table);
        this.setFixedCellWidth                        (50);
        this.setCellRenderer                        (_rowHeaderRenderer);
        // TODO: grab this value from the parent view table
        JScrollPane panel = new JScrollPane();
        this.setBackground(panel.getBackground());
        this.addMouseMotionListener                    (this);
        this.addMouseListener                        (this);
        this.setModel                                (new DefaultListModel());
        table.getModel().addTableModelListener        (this);
        this.tableChanged                            (new TableModelEvent(_table.getModel()));
    }and as you can see from my mouse dragged event:
    public void mouseDragged(MouseEvent e)
        if(_resizing == true)
            int resizingRowHeight = _rowHeaderRenderer.getRowHeight(_resizingRow);
            _rowHeaderRenderer.setRowHeight(_resizingRow, resizingRowHeight + (e.getPoint().y - _cursorPreviousY));
            _cursorPreviousY = e.getPoint().y;  
    }all I am doing is passing the rowHeaderRenderer the values the currently resizing row should be, which works fine. The values are being changed and are accurate.
The issue I am having is that while this dragging is going on the row does not appear to be resizing. In other words the "picture" of the row remains unchanged even though I change the values in the renderer. I tried calling:
this.validate();and
this.repaint();at the end of that mousedDragged method, but to no avail, neither of them worked.
Again, I verified that I am passing the correct data in the RowHeaderRenderer.
So, anyone have any ideas how I should get the image of the RowHeader (JList) to update after calling my MouseDragged event?
Thank you for your time,
Brandon

Answer 1

I was able to fix this some time ago. Here is the solution:
     public void mouseDragged(MouseEvent e)
          if(_resizing == true)
               int newHeight = _previousHeight + (e.getPoint().y - _cursorPreviousY);
               if(newHeight < _minRowHeight)
                    newHeight = _minRowHeight;
               _rowHeaderRenderer.setRowHeight(_resizingRow, newHeight);
               _table.setRowHeight(_resizingRow, newHeight);
          this.updateUI();
     }