protected void onPopulateItem(GeoServerDataProvider.Property<T> property,
org.apache.wicket.markup.html.list.ListItem item) {
if (property == RENDERING_ORDER) {
Label label = (Label) item.get(0);
OddEvenItem rowContainer = (OddEvenItem) item.getParent().getParent();
label.setDefaultModel(new Model(rowContainer.getIndex() + 1));
item.add(new AbstractBehavior() {
public void onComponentTag(Component component, ComponentTag tag) {
tag.put("style", "width:1%");
}