qt 6.5.1 original

examples/widgets/tools/undoframework/diagramscene.h

@@ -0,0 +1,37 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef DIAGRAMSCENE_H
+#define DIAGRAMSCENE_H
+
+#include <QObject>
+#include <QGraphicsScene>
+
+class DiagramItem;
+QT_BEGIN_NAMESPACE
+class QGraphicsSceneDragDropEvent;
+class QGraphicsViewItem;
+QT_END_NAMESPACE
+
+//! [0]
+class DiagramScene : public QGraphicsScene
+{
+    Q_OBJECT
+
+public:
+    DiagramScene(QObject *parent = nullptr);
+
+signals:
+    void itemMoved(DiagramItem *movedItem, const QPointF &movedFromPosition);
+
+protected:
+    void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
+    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
+
+private:
+    QGraphicsItem *movingItem = nullptr;
+    QPointF oldPos;
+};
+//! [0]
+
+#endif