*/
protected Object openDialogBox(Control cellEditorWindow) {
final ICSSStyleDeclaration styleDeclaration = CSSStyleDeclarationFactory.getInstance().
getStyleDeclaration(_element, _attr.getAttributeName());
final PreferenceManager manager = new PreferenceManager();
final Shell shell = cellEditorWindow.getShell();
final CSSPropertyContext context = new CSSPropertyContext(styleDeclaration);
final StyleDialog dialog = new StyleDialog(shell, manager, _element, context);
if (dialog.open() == Window.OK) {