title: JProgressBar in JTable not updating
body: <p>Why don't the progress bars in the following code update and how would I get them to?</p>
  
  <pre><code>import java.awt.event.{ActionListener, ActionEvent}
  import javax.swing.table.{TableCellRenderer, AbstractTableModel}
  import javax.swing.{Timer, JTable, JProgressBar, JFrame}
  
  object TestProgressBar {
    val frame = new JFrame()
    val model = new TestModel()
    val table = new JTable(model)
  
    class TestModel extends AbstractTableModel {
      def getColumnCount = 4
  
      def getRowCount = 4
  
      def getValueAt(y: Int, x: Int) = "%d,%d".format(x, y)
  
      override def setValueAt(value: Any, row: Int, col: Int) {
        if (col == 0) {
          model.fireTableCellUpdated(row, col);
        }
      }
    }
  
    class TestCellRenderer extends TableCellRenderer with ActionListener {
      val progressBar = new JProgressBar()
      val timer = new Timer(100, this)
  
      progressBar.setIndeterminate(true)
      timer.start()
  
      override def getTableCellRendererComponent(tbl: JTable, value: AnyRef,
                                                 isSelected: Boolean,
                                                 hasFocus: Boolean,
                                                 row: Int, column: Int) = {
        progressBar
      }
  
      override def actionPerformed(e: ActionEvent) {
        val model = table.getModel
        for (row &lt;- 0 to model.getRowCount) {
          model.setValueAt(0, row, 0)
        }
      }
    }
  
    def main(args: Array[String]) {
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
  
      table.getColumnModel.getColumn(0).setCellRenderer(new TestCellRenderer())
  
      frame.add(table)
  
      frame.pack()
      frame.setVisible(true)
    }
  }
  </code></pre>