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

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class ClearSelectionListener extends MouseInputAdapter {
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  private boolean startOutside;

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**サンプルコード [#w9ea8a72]
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class ClearSelectionListener extends MouseAdapter {
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  private static void clearSelectionAndFocus(JList list) {
  private static <E> void clearSelectionAndFocus(JList<E> list) {
    list.clearSelection();
    list.getSelectionModel().setAnchorSelectionIndex(-1);
    list.getSelectionModel().setLeadSelectionIndex(-1);
  }
  private static boolean contains(JList list, Point pt) {
    for(int i=0;i<list.getModel().getSize();i++) {
      Rectangle r = list.getCellBounds(i, i);
      if(r.contains(pt)) return true;
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  private static <E> boolean contains(JList<E> list, Point pt) {
    for (int i = 0; i < list.getModel().getSize(); i++) {
      if (list.getCellBounds(i, i).contains(pt)) {
        return true;
      }
    }
    return false;
  }
  private boolean startOuter = false;
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  @Override public void mousePressed(MouseEvent e) {
    JList list = (JList)e.getSource();
    startOuter = !contains(list, e.getPoint());
    if(startOuter) {
    JList<?> list = (JList<?>) e.getComponent();
    startOutside = !contains(list, e.getPoint());
    if (startOutside) {
      clearSelectionAndFocus(list);
    }
  }
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  @Override public void mouseReleased(MouseEvent e) {
    startOuter = false;
    startOutside = false;
  }
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  @Override public void mouseDragged(MouseEvent e) {
    JList list = (JList)e.getSource();
    if(contains(list, e.getPoint())) {
      startOuter = false;
    }else if(startOuter) {
    JList<?> list = (JList<?>) e.getComponent();
    if (contains(list, e.getPoint())) {
      startOutside = false;
    } else if (startOutside) {
      clearSelectionAndFocus(list);
    }
  }
}