class ThreadedLayoutAction extends AbstractAction {
    boolean layoutMorphingEnabled = true;
    public ThreadedLayoutAction()
    {
      super("Threaded Layout");
    }
    
    public void actionPerformed(ActionEvent ev) {
      
      final OrganicLayouter layouter = new OrganicLayouter();

      //copy graph in AWT thread.
      final CopiedLayoutGraph cGraph = new CopiedLayoutGraph(view.getGraph2D());
      
      //calculate layout on a copy of the original graph
      //within a separate thread.
      final Thread thread = new Thread() {
        public void run() {
          layouter.doLayout(cGraph);
          
          //assing calculated layout to original graph within
          //the AWT thread. 
          SwingUtilities.invokeLater(new Runnable() {
            public void run() {
              if(layoutMorphingEnabled)
              {
                //perform animated morphing on layout result
                GraphLayout gl = cGraph.getLayoutForOriginalGraph();
                new LayoutMorpher(view, gl).execute();
              }
              else
              {
                //assign layout and display result
                cGraph.commitLayoutToOriginalGraph();
                view.fitContent();
                view.updateView();
              }
            }
          });
        }
      };
      //assign minimum priority to the thread so that the
      //GUI remains responsive
      thread.setPriority(Thread.MIN_PRIORITY);
      //start the thread
      thread.start();
      
    }
  }