--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/draganddrop/puzzle/pieceslist.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,122 @@
+/****************************************************************************
+**
+** 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 "pieceslist.h"
+
+PiecesList::PiecesList(QWidget *parent)
+    : QListWidget(parent)
+{
+    setDragEnabled(true);
+    setViewMode(QListView::IconMode);
+    setIconSize(QSize(60, 60));
+    setSpacing(10);
+    setAcceptDrops(true);
+    setDropIndicatorShown(true);
+}
+
+void PiecesList::dragEnterEvent(QDragEnterEvent *event)
+{
+    if (event->mimeData()->hasFormat("image/x-puzzle-piece"))
+        event->accept();
+    else
+        event->ignore();
+}
+
+void PiecesList::dragMoveEvent(QDragMoveEvent *event)
+{
+    if (event->mimeData()->hasFormat("image/x-puzzle-piece")) {
+        event->setDropAction(Qt::MoveAction);
+        event->accept();
+    } else
+        event->ignore();
+}
+
+void PiecesList::dropEvent(QDropEvent *event)
+{
+    if (event->mimeData()->hasFormat("image/x-puzzle-piece")) {
+        QByteArray pieceData = event->mimeData()->data("image/x-puzzle-piece");
+        QDataStream dataStream(&pieceData, QIODevice::ReadOnly);
+        QPixmap pixmap;
+        QPoint location;
+        dataStream >> pixmap >> location;
+
+        addPiece(pixmap, location);
+
+        event->setDropAction(Qt::MoveAction);
+        event->accept();
+    } else
+        event->ignore();
+}
+
+void PiecesList::addPiece(QPixmap pixmap, QPoint location)
+{
+    QListWidgetItem *pieceItem = new QListWidgetItem(this);
+    pieceItem->setIcon(QIcon(pixmap));
+    pieceItem->setData(Qt::UserRole, QVariant(pixmap));
+    pieceItem->setData(Qt::UserRole+1, location);
+    pieceItem->setFlags(Qt::ItemIsEnabled | Qt::ItemIsSelectable
+                        | Qt::ItemIsDragEnabled);
+}
+
+void PiecesList::startDrag(Qt::DropActions /*supportedActions*/)
+{
+    QListWidgetItem *item = currentItem();
+
+    QByteArray itemData;
+    QDataStream dataStream(&itemData, QIODevice::WriteOnly);
+    QPixmap pixmap = qVariantValue<QPixmap>(item->data(Qt::UserRole));
+    QPoint location = item->data(Qt::UserRole+1).toPoint();
+
+    dataStream << pixmap << location;
+
+    QMimeData *mimeData = new QMimeData;
+    mimeData->setData("image/x-puzzle-piece", itemData);
+
+    QDrag *drag = new QDrag(this);
+    drag->setMimeData(mimeData);
+    drag->setHotSpot(QPoint(pixmap.width()/2, pixmap.height()/2));
+    drag->setPixmap(pixmap);
+
+    if (drag->exec(Qt::MoveAction) == Qt::MoveAction)
+        delete takeItem(row(item));
+}