1 files changed, 41 insertions, 0 deletions
diff --git a/examples/datavisualization/graphgallery/variantdataset.h b/examples/datavisualization/graphgallery/variantdataset.h
new file mode 100644
index 00000000..ca0d7ffd
--- /dev/null
+++ b/examples/datavisualization/graphgallery/variantdataset.h
@@ -0,0 +1,41 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef VARIANTDATASET_H
+#define VARIANTDATASET_H
+
+#include <QtCore/qvariantlist.h>
+
+//! [0]
+using VariantDataItem = QVariantList;
+using VariantDataItemList = QList<VariantDataItem *>;
+//! [0]
+
+class VariantDataSet : public QObject
+{
+    Q_OBJECT
+
+public:
+    explicit VariantDataSet();
+    ~VariantDataSet();
+
+    //! [1]
+    void clear();
+
+    int addItem(VariantDataItem *item);
+    int addItems(VariantDataItemList *itemList);
+
+    const VariantDataItemList &itemList() const;
+
+Q_SIGNALS:
+    void itemsAdded(int index, int count);
+    void dataCleared();
+    //! [1]
+
+private:
+    VariantDataItemList m_variantData;
+
+    Q_DISABLE_COPY(VariantDataSet)
+};
+
+#endif