private void generateReport() {
   progressBar.progressProperty().unbind();
   progressBar.progressProperty().bind(reportGeneratorTask.progressProperty());
   new Thread(reportGeneratorTask).start();
   reportGeneratorTask.addEventHandler(
       WorkerStateEvent.WORKER_STATE_SUCCEEDED,
       new EventHandler<WorkerStateEvent>() {
         @Override
         public void handle(WorkerStateEvent t) {
           setCenter(reportGeneratorTask.getValue());
         }
       });
 }