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

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class WidePopupMenuListener implements PopupMenuListener {
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  private static final int POPUP_MIN_WIDTH = 300;
  private boolean adjusting;

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#screenshot
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**サンプルコード [#v4b8bfc8]
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#code{{
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class MinWidthPopupMenuListener implements PopupMenuListener{
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  private static final int POPUP_MIN_WIDTH = 320;
  private boolean adjusting = false;
  public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
    JComboBox combo = (JComboBox)e.getSource();
    Dimension size  = combo.getSize();
    if(size.width>=POPUP_MIN_WIDTH) return;
    if(!adjusting) {
  @Override public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
    JComboBox<?> combo = (JComboBox<?>) e.getSource();
    Dimension size = combo.getSize();
    if (size.width >= POPUP_MIN_WIDTH) {
      return;
    }
    if (!adjusting) {
      adjusting = true;
      combo.setSize(POPUP_MIN_WIDTH, size.height);
      combo.showPopup();
    }
    combo.setSize(size);
    adjusting = false;
  }
  public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {}
  public void popupMenuCanceled(PopupMenuEvent e) {}
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  @Override public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
    /* not needed */
  }
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  @Override public void popupMenuCanceled(PopupMenuEvent e) {
    /* not needed */
  }
}