Swing/ExplorerLikeTable のバックアップ(No.28)

class TestRenderer extends Box implements TableCellRenderer {
  private final Border emptyBorder = BorderFactory.createEmptyBorder(1, 1, 1, 1);
  private final ImageIcon nicon;
  private final ImageIcon sicon;
  private final JLabel textLabel;
  private final JLabel iconLabel;
  public TestRenderer(JTable table) {
    super(BoxLayout.X_AXIS);
    textLabel = new JLabel("dummy");
    textLabel.setOpaque(true);
    textLabel.setBorder(emptyBorder);
    nicon = new ImageIcon(getClass().getResource("wi0063-16.png"));
    FilteredImageSource fis = new FilteredImageSource(
      nicon.getImage().getSource(), new SelectedImageFilter());
    sicon = new ImageIcon(createImage(fis));
    iconLabel = new JLabel(nicon);
    iconLabel.setBorder(BorderFactory.createEmptyBorder());
    table.setRowHeight(Math.max(textLabel.getPreferredSize().height,
                  iconLabel.getPreferredSize().height));
    add(iconLabel);
    add(textLabel);
    add(Box.createHorizontalGlue());
  }
  @Override public Component getTableCellRendererComponent(JTable table,
      Object value, boolean isSelected, boolean hasFocus, int row, int column) {
    textLabel.setText(Objects.toString(value, ""));
    FontMetrics fm = table.getFontMetrics(table.getFont());
    int swidth = fm.stringWidth(textLabel.getText()) + textLabel.getInsets().left
                              + textLabel.getInsets().right;
    int cwidth = table.getColumnModel().getColumn(column).getWidth()
                   -iconLabel.getPreferredSize().width;
    textLabel.setPreferredSize(new Dimension(swidth > cwidth ? cwidth : swidth, 0));
    if (isSelected) {
      textLabel.setForeground(table.getSelectionForeground());
      textLabel.setBackground(table.getSelectionBackground());
    } else {
      textLabel.setForeground(table.getForeground());
      textLabel.setBackground(table.getBackground());
    }
    if (hasFocus) {
      textLabel.setBorder(UIManager.getBorder("Table.focusCellHighlightBorder"));
    } else {
      textLabel.setBorder(emptyBorder);
    }
    textLabel.setFont(table.getFont());
    iconLabel.setIcon(isSelected?sicon:nicon);
    return this;
  }
  private static class SelectedImageFilter extends RGBImageFilter {
    public SelectedImageFilter() {
      canFilterIndexColorModel = false;
    }
    @Override public int filterRGB(int x, int y, int argb) {
      //Color color = new Color(argb, true);
      //float[] array = new float[4];
      //color.getComponents(array);
      //return new Color(array[0] * .5f, array[1] * .5f, array[2], array[3]).getRGB();
      int r = (argb >> 16) & 0xff;
      int g = (argb >>  8) & 0xff;
      return (argb & 0xff0000ff) | ((r >> 1) << 16) | ((g >> 1) << 8);
    }
  }
}