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diff --git a/examples/widgets/graphicsview/diagramscene/diagramitem.cpp b/examples/widgets/graphicsview/diagramscene/diagramitem.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtWidgets>
+
+#include "diagramitem.h"
+#include "arrow.h"
+
+//! [0]
+DiagramItem::DiagramItem(DiagramType diagramType, QMenu *contextMenu,
+             QGraphicsItem *parent)
+    : QGraphicsPolygonItem(parent)
+{
+    myDiagramType = diagramType;
+    myContextMenu = contextMenu;
+
+    QPainterPath path;
+    switch (myDiagramType) {
+        case StartEnd:
+            path.moveTo(200, 50);
+            path.arcTo(150, 0, 50, 50, 0, 90);
+            path.arcTo(50, 0, 50, 50, 90, 90);
+            path.arcTo(50, 50, 50, 50, 180, 90);
+            path.arcTo(150, 50, 50, 50, 270, 90);
+            path.lineTo(200, 25);
+            myPolygon = path.toFillPolygon();
+            break;
+        case Conditional:
+            myPolygon << QPointF(-100, 0) << QPointF(0, 100)
+                      << QPointF(100, 0) << QPointF(0, -100)
+                      << QPointF(-100, 0);
+            break;
+        case Step:
+            myPolygon << QPointF(-100, -100) << QPointF(100, -100)
+                      << QPointF(100, 100) << QPointF(-100, 100)
+                      << QPointF(-100, -100);
+            break;
+        default:
+            myPolygon << QPointF(-120, -80) << QPointF(-70, 80)
+                      << QPointF(120, 80) << QPointF(70, -80)
+                      << QPointF(-120, -80);
+            break;
+    }
+    setPolygon(myPolygon);
+    setFlag(QGraphicsItem::ItemIsMovable, true);
+    setFlag(QGraphicsItem::ItemIsSelectable, true);
+    setFlag(QGraphicsItem::ItemSendsGeometryChanges, true);
+}
+//! [0]
+
+//! [1]
+void DiagramItem::removeArrow(Arrow *arrow)
+{
+    int index = arrows.indexOf(arrow);
+
+    if (index != -1)
+        arrows.removeAt(index);
+}
+//! [1]
+
+//! [2]
+void DiagramItem::removeArrows()
+{
+    foreach (Arrow *arrow, arrows) {
+        arrow->startItem()->removeArrow(arrow);
+        arrow->endItem()->removeArrow(arrow);
+        scene()->removeItem(arrow);
+        delete arrow;
+    }
+}
+//! [2]
+
+//! [3]
+void DiagramItem::addArrow(Arrow *arrow)
+{
+    arrows.append(arrow);
+}
+//! [3]
+
+//! [4]
+QPixmap DiagramItem::image() const
+{
+    QPixmap pixmap(250, 250);
+    pixmap.fill(Qt::transparent);
+    QPainter painter(&pixmap);
+    painter.setPen(QPen(Qt::black, 8));
+    painter.translate(125, 125);
+    painter.drawPolyline(myPolygon);
+
+    return pixmap;
+}
+//! [4]
+
+//! [5]
+void DiagramItem::contextMenuEvent(QGraphicsSceneContextMenuEvent *event)
+{
+    scene()->clearSelection();
+    setSelected(true);
+    myContextMenu->exec(event->screenPos());
+}
+//! [5]
+
+//! [6]
+QVariant DiagramItem::itemChange(GraphicsItemChange change,
+                     const QVariant &value)
+{
+    if (change == QGraphicsItem::ItemPositionChange) {
+        foreach (Arrow *arrow, arrows) {
+            arrow->updatePosition();
+        }
+    }
+
+    return value;
+}
+//! [6]