// runnable can be a func(O o) {} receving the selected item
static JList onDoubleClick(final JList list, final O runnable) {
  swing {
    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 JTable onDoubleClick(final JTable table, final O runnable) {
  swing {
    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);
        }
      }
    });
  }
  ret table;
}

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