Show JToolTip for Icons placed in the cell of the JTable

• download example.jar
• download src.zip
• repository

Code

JTable table = new JTable(model) {
  @Override public String getToolTipText(MouseEvent e) {
    Point pt = e.getPoint();
    int vrow = rowAtPoint(pt);
    int vcol = columnAtPoint(pt);
    int mcol = convertColumnIndexToModel(vcol);
    if (mcol == 1) {
      TableCellRenderer tcr = getCellRenderer(vrow, vcol);
      Component c = prepareRenderer(tcr, vrow, vcol);
      if (c instanceof JPanel) {
        Rectangle r = getCellRect(vrow, vcol, true);
        c.setBounds(r);
        c.doLayout();
        pt.translate(-r.x, -r.y);
        Component l = SwingUtilities.getDeepestComponentAt(c, pt.x, pt.y);
        if (l instanceof JLabel) {
          ImageIcon icon = (ImageIcon) ((JLabel) l).getIcon();
          return icon.getDescription();
        }
      }
    }
    return super.getToolTipText(e);
  }
};

class ListIconRenderer implements TableCellRenderer {
  private final JPanel p = new JPanel(new FlowLayout(FlowLayout.LEFT));

  @Override public Component getTableCellRendererComponent(
      JTable table, Object value,
      boolean isSelected, boolean hasFocus, int row, int column) {
    p.removeAll();
    if (isSelected) {
      p.setOpaque(true);
      p.setBackground(table.getSelectionBackground());
    } else {
      p.setOpaque(false);
    }
    if (value instanceof List<?>) {
      for (Object o : (List<?>) value) {
        if (o instanceof Icon) {
          Icon icon = (Icon) o;
          JLabel label = new JLabel(icon);
          label.setToolTipText(icon.toString());
          p.add(label);
        }
      }
    }
    return p;
  }
}

References

• java - Tool tip in JPanel in JTable not working - Stack Overflow
• Show JToolTip for Icons placed in the cell of the JTable(Japanese)

JLabel Star Rating Bar

• download example.jar
• download src.zip
• repository

Code

private final ImageProducer ip = orgIcon.getImage().getSource();

private static ImageIcon makeStarImageIcon(
    ImageProducer ip, float rf, float gf, float bf) {
  return new ImageIcon(Toolkit.getDefaultToolkit().createImage(
    new FilteredImageSource(ip, new SelectedImageFilter(rf, gf, bf))));
}

class SelectedImageFilter extends RGBImageFilter {
  private final float rf;
  private final float gf;
  private final float bf;

  protected SelectedImageFilter(float rf, float gf, float bf) {
    super();
    this.rf = Math.min(1f, rf);
    this.gf = Math.min(1f, gf);
    this.bf = Math.min(1f, bf);
    canFilterIndexColorModel = false;
  }

  @Override public int filterRGB(int x, int y, int argb) {
    int r = (int) (((argb >> 16) & 0xFF) * rf);
    int g = (int) (((argb >> 8) & 0xFF) * gf);
    int b = (int) ((argb & 0xFF) * bf);
    return (argb & 0xFF_00_00_00) | (r << 16) | (g << 8) | (b);
  }
}

References

• PI Diagona Icons Pack 1.0 - Download Royalty Free Icons and Stock Images For Web & Graphics Design
• JLabel Star Rating Bar(Japanese)

create round image JButton

• download example.jar
• download src.zip
• repository

Code

class RoundButton extends JButton {
  protected Shape base;
  protected Shape shape

  public RoundButton() {
    this(null, null);
  }

  public RoundButton(Icon icon) {
    this(null, icon);
  }

  public RoundButton(String text) {
    this(text, null);
  }

  public RoundButton(Action a) {
    this();
    setAction(a);
  }

  public RoundButton(String text, Icon icon) {
    setModel(new DefaultButtonModel());
    init(text, icon);
    if (icon == null) {
      return;
    }
    setBorder(BorderFactory.createEmptyBorder(1, 1, 1, 1));
    setBackground(Color.BLACK);
    setContentAreaFilled(false);
    setFocusPainted(false);
    // setVerticalAlignment(SwingConstants.TOP);
    setAlignmentY(Component.TOP_ALIGNMENT);
    initShape();
  }

  protected void initShape() {
    if (!getBounds().equals(base)) {
      Dimension s = getPreferredSize();
      base = getBounds();
      shape = new Ellipse2D.Float(0, 0, s.width - 1, s.height - 1);
    }
  }

  @Override public Dimension getPreferredSize() {
    Icon icon = getIcon();
    Insets i = getInsets();
    int iw = Math.max(icon.getIconWidth(), icon.getIconHeight());
    return new Dimension(iw + i.right + i.left, iw + i.top + i.bottom);
  }

  @Override protected void paintBorder(Graphics g) {
    initShape();
    Graphics2D g2 = (Graphics2D) g.create();
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                        RenderingHints.VALUE_ANTIALIAS_ON);
    g2.setColor(getBackground());
    // g2.setStroke(new BasicStroke(1f));
    g2.draw(shape);
    g2.dispose();
  }

  @Override public boolean contains(int x, int y) {
    initShape();
    return shape.contains(x, y);
    // Transparent color is 0, making it unclickable:
    // or return super.contains(x, y) && ((image.getRGB(x, y) >> 24) & 0xff) > 0;
  }
}

References

• create round image JButton(Japanese)
• Java Swing Tips: Rounded Corner JButton