triangle.setBackgroundColor(ColorConstants.black);
triangle.setForegroundColor(ColorConstants.black);
triangle.setFill(true);
triangle.setDirection(Triangle.SOUTH);
triangle.setLocation(new Point(5, 3));
setLayoutManager(new FreeformLayout());
add(triangle);
setPreferredSize(15, 15);
addChangeListener(new ChangeListener() {
public void handleStateChanged(ChangeEvent event) {
if (event.getPropertyName().equals(ButtonModel.SELECTED_PROPERTY)) {