// Copyright (C) 2016 The Qt Company Ltd. // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause //! [0] QTreeWidget *treeWidget = new QTreeWidget(); treeWidget->setColumnCount(1); QList items; for (int i = 0; i < 10; ++i) items.append(new QTreeWidgetItem(static_cast(nullptr), QStringList(QString("item: %1").arg(i)))); treeWidget->insertTopLevelItems(0, items); //! [0]