} else if (de instanceof QueryDisplayEvent) {
QueryDisplayEvent qde = (QueryDisplayEvent) de;
qde.setQueryChanged(true);
fireQueryDisplayEvent(qde);
} else if (de instanceof DataMapDisplayEvent) {
DataMapDisplayEvent dmde = (DataMapDisplayEvent) de;
dmde.setDataMapChanged(true);
fireDataMapDisplayEvent(dmde);
} else if (de instanceof DataNodeDisplayEvent) {
DataNodeDisplayEvent dnde = (DataNodeDisplayEvent) de;
dnde.setDataNodeChanged(true);
fireDataNodeDisplayEvent(dnde);