VerticalPanel errorDetails = new VerticalPanel();
errorDetails.add(new Label("" + Util.getSimpleName(paintable)
+ " inside " + Util.getSimpleName(layout)));
final CheckBox emphasisInUi = new CheckBox(
"Emphasis components parent in UI (actual component is not visible)");
emphasisInUi.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
if (paintable != null) {
Element element2 = ((Widget) layout).getElement();
Widget.setStyleName(element2, "invalidlayout",
emphasisInUi.getValue());