1 files changed, 29 insertions, 0 deletions
diff --git a/examples/charts/chartsgallery/stackeddrilldownseries.h b/examples/charts/chartsgallery/stackeddrilldownseries.h
new file mode 100644
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--- /dev/null
+++ b/examples/charts/chartsgallery/stackeddrilldownseries.h
@@ -0,0 +1,29 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+#ifndef STACKEDDRILLDOWNSERIES_H
+#define STACKEDDRILLDOWNSERIES_H
+
+#include <QMap>
+#include <QStackedBarSeries>
+
+//! [1]
+class StackedDrilldownSeries : public QStackedBarSeries
+{
+    Q_OBJECT
+public:
+    StackedDrilldownSeries(const QStringList &categories, int maxValue, QObject *parent = nullptr);
+
+    void mapDrilldownSeries(int index, StackedDrilldownSeries *drilldownSeries);
+    StackedDrilldownSeries *drilldownSeries(int index) const;
+    QStringList categories() const;
+    int maxValue() const;
+
+private:
+    QMap<int, StackedDrilldownSeries *> m_drilldownSeries;
+    QStringList m_categories;
+    int m_maxValue = 0;
+};
+//! [1]
+
+#endif