com.smartgwt.client.widgets.grid.events

## Interface HasGroupTreeChangedHandlers

- All Superinterfaces:
    com.google.gwt.event.shared.HasHandlers
  All Known Implementing Classes:
    CalendarView, CubeGrid, DateGrid, EditTree, ListGrid, ListPalette, Menu, MenuPalette, PickListMenu, RecordEditor, SelectionTreeMenu, TableView, TreeGrid, TreePalette

      public interface HasGroupTreeChangedHandlers
      extends com.google.gwt.event.shared.HasHandlers

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `com.google.gwt.event.shared.HandlerRegistration` | `addGroupTreeChangedHandler(GroupTreeChangedHandler handler)` Callback fired when a `grouping` operation completes, whether it started as a direct call to `groupBy()` or `regroup()` or data changing, including incremental changes.

    - ### Methods inherited from interface com.google.gwt.event.shared.HasHandlers

      `fireEvent`

- - ### Method Detail

    - #### addGroupTreeChangedHandler

          com.google.gwt.event.shared.HandlerRegistration addGroupTreeChangedHandler(GroupTreeChangedHandler handler)

      Callback fired when a `grouping` operation completes, whether it started as a direct call to `groupBy()` or `regroup()` or data changing, including incremental changes.

      If `changeType` is "groupBy", `ListGrid.groupBy()` should have been called at the beginning of the operation, and `ListGrid.groupByComplete()` will be called immediately before this method. If `changeType` is "regroup", then `ListGrid.regroup()` should have been called at the beginning of the operation.

      Parameters:
        `handler` - the groupTreeChanged handler
      Returns:
        `HandlerRegistration` used to remove this handler