}
public static class ChangeOptionActionListener extends EventListener<UIDropDownControl> {
public void execute(Event<UIDropDownControl> event) throws Exception {
UIDropDownControl uiDropDown = event.getSource();
String category = event.getRequestContext().getRequestParameter(OBJECTID);
UIItemThemeSelector uiFormInput = uiDropDown.getParent();
uiFormInput.setSelectedCategory(category);
UIPortletForm uiportletForm = uiFormInput.getAncestorOfType(UIPortletForm.class);
uiportletForm.setSelectedTab(uiportletForm.getChild(UIFormInputThemeSelector.class).getId());
event.getRequestContext().addUIComponentToUpdateByAjax(uiFormInput);
}