JTree and dropdown options on right clicking nodes

Question

I\'m trying to use the JTree and implement different drop downs for all the parent nodes and the children nodes.

Here\'s what I\'ve done:

pmTree.addM         


        

Answer 1

Don't go as low-level as a MouseListener, instead use the api around componentPopupMenu. Doing so, the general approach is dynamically configure the componentPopup in the getPopupLocation method, some simple example snippet:

    JPopupMenu popup = new JPopupMenu();
    final Action action = new AbstractAction("empty") {

        @Override
        public void actionPerformed(ActionEvent e) {
            // TODO Auto-generated method stub
        }
    };
    popup.add(action); 
    JTree tree = new JTree() {

        /** 
         * @inherited 

         */
        @Override
        public Point getPopupLocation(MouseEvent e) {
            if (e != null) {
               // here do your custom config, like f.i add/remove menu items based on context
               // this example simply changes the action name 
               TreePath path = getClosestPathForLocation(e.getX(), e.getY());
               action.putValue(Action.NAME, String.valueOf(path.getLastPathComponent()));
               return e.getPoint();
            }
            action.putValue(Action.NAME, "no mouse"); 
            return null;
        }

    };
    tree.setComponentPopupMenu(popup);