// runnable can be a func(O o) {} receving the selected item
static JList onDoubleClick(final JList list, final O runnable) {
  list.addMouseListener(new MouseAdapter {
    public void mouseClicked(MouseEvent evt) {
      if (evt.getClickCount() == 2) {
        int idx = list.locationToIndex(evt.getPoint());
        O item = list.getModel().getElementAt(idx);
        list.setSelectedIndex(idx);
        callF(runnable, item);
      }
    }
  });
  ret list;
}

// runnable can be a func(O o) {} receving the selected row index
static void onDoubleClick(final JTable table, final O runnable) {
  table.addMouseListener(new MouseAdapter {
    public void mouseClicked(MouseEvent evt) {
      if (evt.getClickCount() == 2) {
        int idx = table.rowAtPoint(evt.getPoint());
        table.setRowSelectionInterval(idx, idx);
        callF(runnable, idx);
      }
    }
  });
}

// other components get the pointer position
// only reacts on left button
static void onDoubleClick(JComponent c, final O runnable) {
  c.addMouseListener(new MouseAdapter {
    public void mouseClicked(MouseEvent evt) {
      if (evt.getButton() == 1 && evt.getClickCount() == 2)
        callF(runnable, evt.getPoint());
    }
  });
}