void QItemDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
{
#ifdef QT_NO_PROPERTIES
    Q_UNUSED(editor);
    Q_UNUSED(index);
#else
    Q_D(const QItemDelegate);
    QVariant v = index.data(Qt::EditRole);
    QByteArray n = editor->metaObject()->userProperty().name();

    // ### Qt 5: remove
    // A work-around for missing "USER true" in qdatetimeedit.h for
    // QTimeEdit's time property and QDateEdit's date property.
    // It only triggers if the default user property "dateTime" is
    // reported for QTimeEdit and QDateEdit.
    if (n == "dateTime") {
        if (editor->inherits("QTimeEdit"))
            n = "time";
        else if (editor->inherits("QDateEdit"))
            n = "date";
    }

    // ### Qt 5: give QComboBox a USER property
    if (n.isEmpty() && editor->inherits("QComboBox"))
        n = d->editorFactory()->valuePropertyName(v.userType());
    if (!n.isEmpty()) {
        if (!v.isValid())
            v = QVariant(editor->property(n).userType(), (const void *)0);
        editor->setProperty(n, v);
    }
#endif