Right-click context menu for Java JTree?

Question

I\'m trying to implement pop-up menus in Java JTree. I\'ve sub-classed DefaultTreeCellRenderer (to change node appearance) and DefaultTreeCellEditor (to create Components to

Answer 1

Thanks everyone. I knew something was wrong when I was spending that much effort on implementing a simple popup.

I dismissed this line of thought at first because it felt weird to resort to x- and y- coordinates to find the node I'm looking for, but I guess this is the way to do it.

    // add MouseListener to tree
    MouseAdapter ma = new MouseAdapter() {
        private void myPopupEvent(MouseEvent e) {
            int x = e.getX();
            int y = e.getY();
            JTree tree = (JTree)e.getSource();
            TreePath path = tree.getPathForLocation(x, y);
            if (path == null)
                return; 

            tree.setSelectionPath(path);

            My_Obj obj = (My_Obj)path.getLastPathComponent();

            String label = "popup: " + obj.getTreeLabel();
            JPopupMenu popup = new JPopupMenu();
            popup.add(new JMenuItem(label));
            popup.show(tree, x, y);
        }
        public void mousePressed(MouseEvent e) {
            if (e.isPopupTrigger()) myPopupEvent(e);
        }
        public void mouseReleased(MouseEvent e) {
            if (e.isPopupTrigger()) myPopupEvent(e);
        }
    };

    (...)

    JTree tree = new JTree();
    tree.addMouseListener(ma);