Combine 3 examples into one qmlsurfacegallery

Combine qmlsurface, qml3doscilloscope, and qmlspectrogram into
one surface graph gallery example.

Fixes: QTBUG-110700
Change-Id: Ic8319884a61a12c5d65c68314c958a86d62a65b1
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
Reviewed-by: Tomi Korpipää <tomi.korpipaa@qt.io>
(cherry picked from commit 6b9e8224c2e567ed0f42fa5ebc442d201615fa3e)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/examples/datavisualization/qmlsurfacegallery/datasource.h b/examples/datavisualization/qmlsurfacegallery/datasource.h
new file mode 100644
index 00000000..acbc3479
--- /dev/null
+++ b/examples/datavisualization/qmlsurfacegallery/datasource.h
@@ -0,0 +1,38 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+#ifndef DATASOURCE_H
+#define DATASOURCE_H
+
+#include <QtDataVisualization/qsurface3dseries.h>
+#include <QtQml/qqmlregistration.h>
+
+//! [0]
+//! [2]
+class DataSource : public QObject
+{
+    Q_OBJECT
+    //! [0]
+    QML_ELEMENT
+    //! [2]
+public:
+    explicit DataSource(QObject *parent = 0);
+    virtual ~DataSource();
+
+    //! [1]
+    Q_INVOKABLE void generateData(int cacheCount, int rowCount, int columnCount,
+                                  float xMin, float xMax,
+                                  float yMin, float yMax,
+                                  float zMin, float zMax);
+
+    Q_INVOKABLE void update(QSurface3DSeries *series);
+    //! [1]
+private:
+    void clearData();
+
+    QList<QSurfaceDataArray> m_data;
+    int m_index;
+    QSurfaceDataArray *m_resetArray;
+};
+
+#endif