-Swingは任意のコントロールを搭載できるGroupPanel

public class ComponentTitledBorder implements Border, MouseListener, SwingConstants {
    int offset = 5;

    Component comp;
    JComponent container;
    Rectangle rect;
    Border border;

    public ComponentTitledBorder(Component comp, JComponent container, Border border) {
        this.comp = comp;
        this.container = container;
        this.border = border;
        container.addMouseListener(this);
    }

    public boolean isBorderOpaque() {
        return true;
    }

    public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
        Insets borderInsets = border.getBorderInsets(c);
        Insets insets = getBorderInsets(c);
        int temp = (insets.top - borderInsets.top) / 2;
        border.paintBorder(c, g, x, y + temp, width, height - temp);
        Dimension size = comp.getPreferredSize();
        rect = new Rectangle(offset, 0, size.width, size.height);
        SwingUtilities.paintComponent(g, comp, (Container) c, rect);
    }

    public Insets getBorderInsets(Component c) {
        Dimension size = comp.getPreferredSize();
        Insets insets = border.getBorderInsets(c);
        insets.top = Math.max(insets.top, size.height);
        return insets;
    }

    private void dispatchEvent(MouseEvent me) {
        if (rect != null && rect.contains(me.getX(), me.getY())) {
            Point pt = me.getPoint();
            pt.translate(-offset, 0);
            comp.setBounds(rect);
            comp.dispatchEvent(new MouseEvent(comp, me.getID(), me.getWhen(), me.getModifiers(),
                    pt.x, pt.y, me.getClickCount(), me.isPopupTrigger(), me.getButton()));
            if (!comp.isValid())
                container.repaint();
        }
    }

    public void mouseClicked(MouseEvent me) {
        dispatchEvent(me);
    }

    public void mouseEntered(MouseEvent me) {
        dispatchEvent(me);
    }

    public void mouseExited(MouseEvent me) {
        dispatchEvent(me);
    }

    public void mousePressed(MouseEvent me) {
        dispatchEvent(me);
    }

    public void mouseReleased(MouseEvent me) {
        dispatchEvent(me);
    }

}