diff -r 000000000000 -r 1918ee327afb examples/graphicsview/diagramscene/diagramitem.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/graphicsview/diagramscene/diagramitem.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,152 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "diagramitem.h"
+#include "arrow.h"
+
+//! [0]
+DiagramItem::DiagramItem(DiagramType diagramType, QMenu *contextMenu,
+             QGraphicsItem *parent, QGraphicsScene *scene)
+    : QGraphicsPolygonItem(parent, scene)
+{
+    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);
+}
+//! [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]