1 files changed, 8 insertions, 6 deletions
diff --git a/examples/widgets/itemviews/simpletreemodel/treemodel.h b/examples/widgets/itemviews/simpletreemodel/treemodel.h
index aa93c33494..1a42fa585f 100644
--- a/examples/widgets/itemviews/simpletreemodel/treemodel.h
+++ b/examples/widgets/itemviews/simpletreemodel/treemodel.h
@@ -16,23 +16,25 @@ class TreeModel : public QAbstractItemModel
     Q_OBJECT
 
 public:
+    Q_DISABLE_COPY_MOVE(TreeModel)
+
     explicit TreeModel(const QString &data, QObject *parent = nullptr);
-    ~TreeModel();
+    ~TreeModel() override;
 
     QVariant data(const QModelIndex &index, int role) const override;
     Qt::ItemFlags flags(const QModelIndex &index) const override;
     QVariant headerData(int section, Qt::Orientation orientation,
                         int role = Qt::DisplayRole) const override;
     QModelIndex index(int row, int column,
-                      const QModelIndex &parent = QModelIndex()) const override;
+                      const QModelIndex &parent = {}) const override;
     QModelIndex parent(const QModelIndex &index) const override;
-    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
-    int columnCount(const QModelIndex &parent = QModelIndex()) const override;
+    int rowCount(const QModelIndex &parent = {}) const override;
+    int columnCount(const QModelIndex &parent = {}) const override;
 
 private:
-    void setupModelData(const QStringList &lines, TreeItem *parent);
+    static void setupModelData(const QList<QStringView> &lines, TreeItem *parent);
 
-    TreeItem *rootItem;
+    std::unique_ptr<TreeItem> rootItem;
 };
 //! [0]