Method lessThan

launcher/minecraft/mod/ResourceFolderModel.cpp:505–526

}

[[nodiscard]] bool ResourceFolderModel::ProxyModel::lessThan(const QModelIndex& source_left, const QModelIndex& source_right) const
{
    auto* model = qobject_cast<ResourceFolderModel*>(sourceModel());
    if (!model || !source_left.isValid() || !source_right.isValid() || source_left.column() != source_right.column()) {
        return QSortFilterProxyModel::lessThan(source_left, source_right);
    }

    // we are now guaranteed to have two valid indexes in the same column... we love the provided invariants unconditionally and
    // proceed.

    auto column_sort_key = model->columnToSortKey(source_left.column());
    auto const& resource_left = model->at(source_left.row());
    auto const& resource_right = model->at(source_right.row());

    auto compare_result = resource_left.compare(resource_right, column_sort_key);
    if (compare_result.first == 0)
        return QSortFilterProxyModel::lessThan(source_left, source_right);

    if (compare_result.second || sortOrder() != Qt::DescendingOrder)
        return (compare_result.first < 0);
    return (compare_result.first > 0);
}