toolBar.add(ShowAllAction.get(ShowAllAction.class));
toolBar.addSeparator();
toolBar.add(ShowAllAction.get(ZoomInAction.class));
toolBar.add(ShowAllAction.get(ZoomOutAction.class));
blockLayoutAction = new EnableBlockLayoutAction();
JToggleButton button = new JToggleButton(blockLayoutAction);
button.setSelected(true);
toolBar.add(button);
blockLayoutAction.addPropertyChangeListener(this);