addEventListener("showSlice", new ShowSliceEventHandler());
addEventListener("order", new OrderEventHandler());
if (this.filterForm != null) {
FormElement filterButton = this.filterForm.addElement("filter",
UiLibMessages.LIST_FILTER_BUTTON_LABEL,
new ButtonControl(), null, false);
((ButtonControl) (filterButton.getControl()))
.addOnClickEventListener(new FilterEventHandler());
this.filterForm.markBaseState();
}
else {