String (MouseEvent event) { TreePath path = getPathForLocation(event.getX(), event.getY()); if (path != null) { RadComponent component = extractComponent(path.getLastPathComponent()); if (component != null) { List<ErrorInfo> errorInfos = RadComponent.getError(component); if (!errorInfos.isEmpty()) { return errorInfos.get(0).getName(); } } } return super.getToolTipText(event); }