Transparent, Translucent JTable

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

Code

JScrollPane scroll = new JScrollPane(table) {
  private final TexturePaint texture = makeImageTexture();
  @Override protected JViewport createViewport() {
    return new JViewport() {
      @Override protected void paintComponent(Graphics g) {
        if (texture != null) {
          Graphics2D g2 = (Graphics2D) g;
          g2.setPaint(texture);
          g2.fillRect(0, 0, getWidth(), getHeight());
        }
        super.paintComponent(g);
      }
    };
  }
};
Color alphaZero = new Color(0x0, true);
table.setOpaque(false);
table.setBackground(alphaZero);
scroll.getViewport().setOpaque(false);
scroll.getViewport().setBackground(alphaZero);

References

• Transparent, Translucent JTable(Japanese)
• Transparent TableHeader

create a JCheckBox rollover effect in a JTable

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

Code

class RolloverBooleanRenderer extends JCheckBox implements TableCellRenderer, UIResource {
  private static final Border noFocusBorder = new EmptyBorder(1, 1, 1, 1);
  private final HighlightListener highlighter;

  public RolloverBooleanRenderer(HighlightListener highlighter) {
    super();
    this.highlighter = highlighter;
    setHorizontalAlignment(SwingConstants.CENTER);
    setBorderPainted(true);
    setRolloverEnabled(true);
    setOpaque(true);
  }

  @Override public Component getTableCellRendererComponent(JTable table, Object value,
        boolean isSelected, boolean hasFocus, int row, int column) {
    if (highlighter.isHighlightableCell(row, column)) {
      getModel().setRollover(true);
    } else {
      getModel().setRollover(false);
    }
    if (isSelected) {
      setForeground(table.getSelectionForeground());
      super.setBackground(table.getSelectionBackground());
    } else {
      setForeground(table.getForeground());
      setBackground(table.getBackground());
    }
    setSelected((value != null && ((Boolean) value).booleanValue()));
    if (hasFocus) {
      setBorder(UIManager.getBorder("Table.focusCellHighlightBorder"));
    } else {
      setBorder(noFocusBorder);
    }
    return this;
  }
}

References

• create a JCheckBox rollover effect in a JTable(Japanese)

Translucent JFrame

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

Code

JFrame.setDefaultLookAndFeelDecorated(true);
JFrame frame = new JFrame();
// com.sun.awt.AWTUtilities.setWindowOpacity(frame, .5f);
com.sun.awt.AWTUtilities.setWindowOpaque(frame, false); // 6u14
// 1.7.0 frame.setBackground(new Color(0, 0, 0, 0));
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
JPanel p = new JPanel();
p.add(new JButton("JButton"));
p.setBackground(new Color(.5f, .8f, .5f, .5f));
frame.getContentPane().add(p);
frame.setSize(320, 240);
frame.setLocationRelativeTo(null);
frame.setVisible(true);

References

• Translucent JFrame(Japanese)
• www.viva-edo.com/komon/edokomon

Custom Decorated TitleBar JFrame

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

Code

class ResizeWindowListener extends MouseAdapter {
  private Rectangle startSide = null;
  private final JFrame frame;
  public ResizeWindowListener(JFrame frame) {
    this.frame = frame;
  }

  @Override public void mousePressed(MouseEvent e) {
    startSide = frame.getBounds();
  }

  @Override public void mouseDragged(MouseEvent e) {
    if (startSide == null) return;
    Component c = e.getComponent();
    if (c == topleft) {
      startSide.y += e.getY();
      startSide.height -= e.getY();
      startSide.x += e.getX();
      startSide.width -= e.getX();
    } else if (c == top) {
      startSide.y += e.getY();
      startSide.height -= e.getY();
    } else if (c == topright) {
      startSide.y += e.getY();
      startSide.height -= e.getY();
      startSide.width += e.getX();
    } else if (c == left) {
      startSide.x += e.getX();
      startSide.width -= e.getX();
    } else if (c == right) {
      startSide.width += e.getX();
    } else if (c == bottomleft) {
      startSide.height += e.getY();
      startSide.x += e.getX();
      startSide.width -= e.getX();
    } else if (c == bottom) {
      startSide.height += e.getY();
    } else if (c == bottomright) {
      startSide.height += e.getY();
      startSide.width += e.getX();
    }
    frame.setBounds(startSide);
  }
}

References

• Custom Decorated TitleBar JFrame(Japanese)
• Java Swing Tips: add JInternalFrame to Undecorated JFrame

JTabbedPane selected tab height

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

Code

class WindowsTabHeightTabbedPaneUI extends WindowsTabbedPaneUI {
  private static final int TAB_AREA_HEIGHT = 32;
  @Override protected int calculateTabHeight(
      int tabPlacement, int tabIndex, int fontHeight) {
    return TAB_AREA_HEIGHT;
  }
  @Override protected void paintTab(
      Graphics g, int tabPlacement, Rectangle[] rects,
      int tabIndex, Rectangle iconRect, Rectangle textRect) {
    if (tabPane.getSelectedIndex() != tabIndex
        && tabPlacement != JTabbedPane.LEFT
        && tabPlacement != JTabbedPane.RIGHT) {
      int tabHeight = TAB_AREA_HEIGHT / 2 + 3;
      rects[tabIndex].height = tabHeight;
      if (tabPlacement == JTabbedPane.TOP) {
        rects[tabIndex].y = TAB_AREA_HEIGHT - tabHeight + 3;
      }
    }
    super.paintTab(g, tabPlacement, rects, tabIndex, iconRect, textRect);
  }
}

References

• JTabbedPane selected tab height(Japanese)