Swing/ListCellAnimation のバックアップの現在との差分(No.1)

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class AnimeListCellRenderer extends JPanel implements ListCellRenderer {
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  private static final Color selectedColor = new Color(230, 230, 255);
  private final AnimeIcon icon = new AnimeIcon();
  private final MarqueeLabel label = new MarqueeLabel();
  private final javax.swing.Timer animator;
  private final JList list;
  private boolean isRunning = false;
  int animate_index = -1;

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#screenshot
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  public AnimeListCellRenderer(final JList l) {
    super(new BorderLayout());
    this.list = l;
    animator = new Timer(80, new ActionListener() {
      @Override public void actionPerformed(ActionEvent e) {
        int i = l.getSelectedIndex();
        if (isRunning = (i >= 0)) {
          l.repaint(l.getCellBounds(i, i));
        }
      }
    });
    setOpaque(true);
    add(icon,  BorderLayout.WEST);
    add(label);
    animator.start();
  }

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**サンプルコード [#dddb9e20]
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#code{{
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 class AnimeListCellRenderer extends JPanel implements ListCellRenderer, ActionListener {
   private static final Color eColor     = new Color(240,240,255);
   private static final Color sColor = new Color(230,230,255);
   private final AnimeIcon icon = new AnimeIcon();
   private final ScrollingLabel label = new ScrollingLabel();
   private final javax.swing.Timer animator;
   private final JList jlist;
   private boolean flag = false;
   public AnimeListCellRenderer(JList list) {
     super(new BorderLayout());
     jlist = list;
     animator = new javax.swing.Timer(100, this);
     animator.start();
     setOpaque(true);
     add(icon,  BorderLayout.WEST);
     add(label, BorderLayout.CENTER);
   }
   public Component getListCellRendererComponent(JList list, Object object,
         int index, boolean isSelected, boolean cellHasFocus) {
     flag = isSelected;
     setBackground(flag?sColor:index%2==0?eColor:list.getBackground());
     label.setText((object==null) ? "" : object.toString());
     return this;
   }
   public void actionPerformed(ActionEvent e) {
     jlist.repaint();
   }
   private class ScrollingLabel extends JLabel {
     private float xx;
     public void ScrollingLabel() {
       setOpaque(false);
     }
     public void paintComponent(Graphics g) {
       Graphics2D g2d = (Graphics2D) g;
 ......
  @Override public Component getListCellRendererComponent(JList list, Object object,
      int index, boolean isSelected, boolean cellHasFocus) {
    setBackground(isSelected ? selectedColor : list.getBackground());
    label.setText((object == null) ? "" : object.toString());
    animate_index = index;
    return this;
  }
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  private boolean isAnimatingCell() {
    return isRunning && animate_index == list.getSelectedIndex();
  }
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  private class MarqueeLabel extends JLabel {
    // ...
  }
  // ...
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}
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