ListGrid: Can I set one field's filter valuemap based on another field's filter selection?

[rodp]

Hi

I have a Listgrid with several fields. Two have valuemaps for filtering. Say one is called Type and has values of A, B, C etc. The other is called SubType, and I would like to set the filter valuemap of SubType depending on what the user selects for Type e.g. if user is only interested in Type A then SubType's valuemap should just contain e.g. A1, A2 etc., but if the user decided to filter on Type B then SubType's choices would be B1, B2 etc. I'm expecting the valuemap for SubType to change as the user selects the Type filter, not when they initiate a fetch by clicking the funnel icon.
Is this possible and if so may I have a clue please? I haven't been able to find an example.

Thank you.

SmartClient Version: v12.0p_2019-04-19/PowerEdition Deployment (built 2019-04-19)

[Isomorphic]

See the Dependent Selects samples. There's one for grids, one for forms.

[rodp]

Thank you Isomorphic, the hint sent me on the right path.

In case anyone would find it useful:

SelectItem typeFilter = new SelectItem();
typeFilter.addChangedHandler(new TypeFilterChangedHandler());
type.setFilterEditorProperties(typeFilter);

private class TypeFilterChangedHandler implements ChangedHandler {
    @Override
    public void onChanged(ChangedEvent changedEvent) {
        String typeFilterValue = (String)changedEvent.getValue();
        if (typeFilterValue == null) {
            _subtype.setFilterEditorValueMap(new HashMap());
        } else {
            _subtype.setFilterEditorValueMap(typeFilterValue.equals("A") ? _aStatusMap : _bStatusMap);
        }
    }
}

"type" is a ListGridField to which I add a SelectItem as a filter editor control. When the user changes the filter selection the sub-type filter value map is set appropriately from Maps I have already created.