public interface HasGroupByHandlers
extends com.google.gwt.event.shared.HasHandlers
| Modifier and Type | Method and Description | 
|---|---|
| com.google.gwt.event.shared.HandlerRegistration | addGroupByHandler(GroupByHandler handler)Callback fired when the user attempts to group or ungroup the listGrid, or when  groupBy()is called programmatically. | 
com.google.gwt.event.shared.HandlerRegistration addGroupByHandler(GroupByHandler handler)
groupBy() is called programmatically.  This event may be cancelled.
  This notification is fired before the data is updated
 to reflect the grouping. See also ListGrid.groupByComplete().
handler - the groupBy handlerHandlerRegistration used to remove this handler