Home/ Questions/Q 7951257
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-04T02:30:29+00:00

I want to create a pop-up menu, which will appear if i right clicked

  • 0

I want to create a pop-up menu, which will appear if i right clicked on the canvas . How can I do this? which function should i modify? Any help would be appreciated.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Following code will create a popup menu when right-clicking either on the vertex or on the canvas…

    /**
 * a GraphMousePlugin that offers popup
 * menu support
 */
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
     */
    protected void handlePopup(MouseEvent e) {
        final VisualizationViewer<GeoLocation.Station,GeoLocation.Link> vv =
                (VisualizationViewer<GeoLocation.Station,GeoLocation.Link>)e.getSource();
        final Point2D p = e.getPoint();
        final Point2D ivp = p;

        GraphElementAccessor<GeoLocation.Station,GeoLocation.Link> pickSupport = vv.getPickSupport();
        if(pickSupport != null) {

            JPopupMenu popup = new JPopupMenu();

            final GeoLocation.Station station = pickSupport.getVertex(vv.getGraphLayout(), ivp.getX(), ivp.getY());

            if(station != null) {
                boolean isRadio = station.getParentSet().contains(STATION_IDENTIFIER_KEY);

                if(isRadio)
                    if (station.getId().equalsIgnoreCase(SneakPeek.getUsername())){

                        String follow = "Follow " + station.getId();
                        if (followLocal){
                            follow = "Do not follow " + station.getId();
                        }
                        else {
                            follow = "Follow " + station.getId();
                        }

                        popup.add(new AbstractAction("<html><center>" + follow) {
                            public void actionPerformed(ActionEvent e) {

                                followLocal = !followLocal;

                            }
                        });

                    }

                if(popup.getComponentCount() > 0) {
                    popup.show(vv, e.getX(), e.getY());
                }
            }
        }
        else { //to pop-up over the canvas/layout rather than over the station

            popup.add(new AbstractAction("Create Unit") {
                public void actionPerformed(ActionEvent e) {
                    //do something here
                }
            });


            if(popup.getComponentCount() > 0) {
                popup.show(vv, e.getX(), e.getY());
            }
        }

    }
}

    Add the class into an AbstractModalGraphMouse class which handles mouse listeners to make it work:

    private AbstractModalGraphMouse graphMouse;
...
graphMouse = new DefaultModalGraphMouse<Object, Object>();
vvMap.setGraphMouse(graphMouse);
graphMouse.add(new PopupGraphMousePlugin());

    The codes above do work. But, if you use different user data for the generic parts, then you need to modify the codes to suit your design.

    • 0