click - 在 JUNG 中使用鼠标右键单击弹出菜单

Question

我想创建一个弹出菜单，如果我右键单击 Canvas 就会出现该菜单。我怎样才能做到这一点？我应该修改哪个功能？任何帮助，将不胜感激。

Answer 1

protected class PopupGraphMousePlugin extends AbstractPopupGraphMousePlugin implements      MouseListener {

    public PopupGraphMousePlugin() {
        this(MouseEvent.BUTTON3_MASK);
    }
    public PopupGraphMousePlugin(int modifiers) {
        super(modifiers);
    }

    /**
     * If this event is over a station (vertex), pop up a menu to
     * allow the user to perform a few actions; else, pop up a menu over the layout/canvas
     *
     * @param e
     */
    @SuppressWarnings("unchecked")
    protected void handlePopup(MouseEvent e) {
        final VisualizationViewer<String,String> vv =(VisualizationViewer<String,String>)e.getSource();
        final Point2D p = e.getPoint();
        final Point2D ivp = p;
        JPopupMenu popup = new JPopupMenu();

        System.out.println("mouse event!");


        GraphElementAccessor<String,String> pickSupport = vv.getPickSupport();
        System.out.println("GraphElementAccessor!");
        if(pickSupport != null) {



            final String pickV = pickSupport.getVertex(vv.getGraphLayout(), ivp.getX(), ivp.getY());

            if(pickV != null) {
               System.out.println("pickVisnotNull");


               popup.add(new AbstractAction("Add New") {
                   /**
                 * 
                 */


                public void actionPerformed(ActionEvent e) {
                   System.out.println("person added");  
                   }
               });//new abstraction

            }
        }///if picksupport



    }//handlePopup(MouseEvent e)
}//PopupGraphMousePlugin

那是你的第一个代码中的那个

这是第二部分

/Next, let's just build a simple mouse, to allow picking, translating, and zooming.
    AbstractModalGraphMouse gMouse = new DefaultModalGraphMouse<Object, Object>();
    vv.setGraphMouse(gMouse); //Add the mouse to our Visualization-Viewer.
    //PluggableGraphMouse pgm = new PluggableGraphMouse();
    gMouse.add(new PickingGraphMousePlugin<Object, Object>());
    //pgm.add(new TranslatingGraphMousePlugin(MouseEvent.BUTTON3_MASK));
    gMouse.add(new PopupGraphMousePlugin());
    gMouse.add(new ScalingGraphMousePlugin(new CrossoverScalingControl(), 0, 1 / 1.1f, 1.1f));