viewer.setDocument(document);
mainPane.setCenter(viewer.getLayoutNode());
Scene s = new Scene(mainPane);
s.getStylesheets().add(MainApplication.class.getResource("test.css").toExternalForm());
s.addEventHandler(KeyEvent.KEY_PRESSED, new EventHandler<KeyEvent>() {
@Override
public void handle(KeyEvent event) {
if( event.isControlDown() && event.getCode() == KeyCode.SPACE ) {
System.err.println("==============> EXEC");