changed = install(rightBar, layerPane) || changed;
changed = install(bottomBar, layerPane) || changed;
changed = install(viewPane, layerPane) || changed;
if(changed) {
layerPane.addComponentListener(new ComponentAdapter() {
public void componentResized(ComponentEvent evt) {
if(evt.getSource() instanceof JLayeredPane)
revalidate();
}
});