將彈出菜單項添加到JChart2D的ChartPanel

Question

是否可以將菜單項添加到JChart2D的ChartPanel彈出菜單中，考慮到類實際上並不保存由LayoutFactory創建的JPopupMenu？

Answer 1

我找到了解決辦法，不知道這是否是最好的：

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

我從來沒有用過我認爲JChart2D的ChartPanel，但JChart2D Features告訴一些關於JPopupMenu，setComponentPopupMenu，How to Use the System Tray，How to Use Separators例子here約PopupMenuListener