_tblAllowedPositions.setLayoutData(tblLayoutData);
cellEditors = new CellEditor[1];
cellEditors[0] = new TextCellEditor(_tblAllowedPositions.getTable());
_tblAllowedPositions.getTableViewer().setCellEditors(cellEditors);
comboPositioning.addModifyListener(new ModifyListener() {
public void modifyText(ModifyEvent e) {
WGPositioningMetaFieldDefinitionModel model = (WGPositioningMetaFieldDefinitionModel)_subformModels.get(SUBFORM_META_POSITIONING);
if (model.getPositioning().getKey().equals(WGContentType.POSITIONING_FIXEDPARENTS) || model.getPositioning().getKey().equals(WGContentType.POSITIONING_FIXEDPARENTTYPES)) {
_tblAllowedPositions.setVisible(true);