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

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JButton b1 = new JButton();
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JButton b2 = new JButton();
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b1.setLayout(new OverlayLayout(b1));
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Insets i = b1.getInsets();
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b1.setBorder(BorderFactory.createEmptyBorder(i.top, i.left, i.bottom, 4));
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b1.setAction(new AbstractAction("OverlayLayoutButton") {
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  @Override public void actionPerformed(ActionEvent e) {
    Toolkit.getDefaultToolkit().beep();
  }
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});
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JButton b2 = new JButton() {
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  private final Dimension dim = new Dimension(120, 24);
  @Override public Dimension getPreferredSize() {
    return dim;
  }

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#screenshot
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  @Override public Dimension getMaximumSize() {
    return getPreferredSize();
  }

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**サンプルコード [#ece74623]
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#code{{
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final JPanel p = new JPanel();
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p.setLayout(new OverlayLayout(p));
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p.setPreferredSize(new Dimension(60, 60));
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p.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
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TriangleButton2 b2 = new TriangleButton2();
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TriangleButton1 b1 = new TriangleButton1();
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b1.setBorder(BorderFactory.createEmptyBorder(20,20,20,20));
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b2.setBorder(BorderFactory.createEmptyBorder(20,20,20,20));
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p.add(b1);
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p.add(b2);
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  @Override public Dimension getMinimumSize() {
    return getPreferredSize();
  }
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};
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b2.setAction(new AbstractAction("▼") {
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  @Override public void actionPerformed(ActionEvent e) {
    System.out.println("sub");
  }
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});
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b2.setAlignmentX(Component.RIGHT_ALIGNMENT);
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b2.setAlignmentY(Component.BOTTOM_ALIGNMENT);
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b1.add(b2);
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