将弹出菜单项添加到JChart2D的ChartPanel

Question

是否可以将菜单项添加到JChart2D的ChartPanel弹出菜单中，考虑到该类实际上没有保存由LayoutFactory创建的JPopupMenu？

Answer 1

我找到了一个解决方案，不确定它是否是最好的：

public class MyChartpanel extends ChartPanel {
  private JPopupMenu popup;
  public MyChartpanel(Chart2D chart) {
    super(chart);
    MouseListener[] listeners = chart.getMouseListeners();

    for (MouseListener listener : listeners) {
      if (listener instanceof PopupListener) {
        PopupListener popupListener = (PopupListener) listener;
        popup = popupListener.getPopup();
        popup.add(new MyMenuItem());
      }
    }
  }
}

Answer 2

我从未使用过我认为JChart2D的ChartPanel，但是JChart2D Features告诉了JPopupMenu，setComponentPopupMenu，How to Use the System Tray，How to Use Separators示例here和约PopupMenuListener