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diff --git a/examples/widgets/itemviews/puzzle/piecesmodel.cpp b/examples/widgets/itemviews/puzzle/piecesmodel.cpp
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-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the examples of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, 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 The Qt Company Ltd 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 "piecesmodel.h"
-
-#include <QIcon>
-#include <QMimeData>
-#include <QRandomGenerator>
-
-PiecesModel::PiecesModel(int pieceSize, QObject *parent)
- : QAbstractListModel(parent), m_PieceSize(pieceSize)
-{
-}
-
-QVariant PiecesModel::data(const QModelIndex &index, int role) const
-{
- if (!index.isValid())
- return QVariant();
-
- if (role == Qt::DecorationRole)
- return QIcon(pixmaps.value(index.row()).scaled(m_PieceSize, m_PieceSize,
- Qt::KeepAspectRatio, Qt::SmoothTransformation));
- else if (role == Qt::UserRole)
- return pixmaps.value(index.row());
- else if (role == Qt::UserRole + 1)
- return locations.value(index.row());
-
- return QVariant();
-}
-
-void PiecesModel::addPiece(const QPixmap &pixmap, const QPoint &location)
-{
- int row;
- if (QRandomGenerator::global()->bounded(2) == 1)
- row = 0;
- else
- row = pixmaps.size();
-
- beginInsertRows(QModelIndex(), row, row);
- pixmaps.insert(row, pixmap);
- locations.insert(row, location);
- endInsertRows();
-}
-
-Qt::ItemFlags PiecesModel::flags(const QModelIndex &index) const
-{
- if (index.isValid())
- return (QAbstractListModel::flags(index)|Qt::ItemIsDragEnabled);
-
- return Qt::ItemIsDropEnabled;
-}
-
-bool PiecesModel::removeRows(int row, int count, const QModelIndex &parent)
-{
- if (parent.isValid())
- return false;
-
- if (row >= pixmaps.size() || row + count <= 0)
- return false;
-
- int beginRow = qMax(0, row);
- int endRow = qMin(row + count - 1, pixmaps.size() - 1);
-
- beginRemoveRows(parent, beginRow, endRow);
-
- while (beginRow <= endRow) {
- pixmaps.removeAt(beginRow);
- locations.removeAt(beginRow);
- ++beginRow;
- }
-
- endRemoveRows();
- return true;
-}
-
-QStringList PiecesModel::mimeTypes() const
-{
- QStringList types;
- types << "image/x-puzzle-piece";
- return types;
-}
-
-QMimeData *PiecesModel::mimeData(const QModelIndexList &indexes) const
-{
- QMimeData *mimeData = new QMimeData();
- QByteArray encodedData;
-
- QDataStream stream(&encodedData, QDataStream::WriteOnly);
-
- for (const QModelIndex &index : indexes) {
- if (index.isValid()) {
- QPixmap pixmap = qvariant_cast<QPixmap>(data(index, Qt::UserRole));
- QPoint location = data(index, Qt::UserRole+1).toPoint();
- stream << pixmap << location;
- }
- }
-
- mimeData->setData("image/x-puzzle-piece", encodedData);
- return mimeData;
-}
-
-bool PiecesModel::dropMimeData(const QMimeData *data, Qt::DropAction action,
- int row, int column, const QModelIndex &parent)
-{
- if (!data->hasFormat("image/x-puzzle-piece"))
- return false;
-
- if (action == Qt::IgnoreAction)
- return true;
-
- if (column > 0)
- return false;
-
- int endRow;
-
- if (!parent.isValid()) {
- if (row < 0)
- endRow = pixmaps.size();
- else
- endRow = qMin(row, pixmaps.size());
- } else {
- endRow = parent.row();
- }
-
- QByteArray encodedData = data->data("image/x-puzzle-piece");
- QDataStream stream(&encodedData, QDataStream::ReadOnly);
-
- while (!stream.atEnd()) {
- QPixmap pixmap;
- QPoint location;
- stream >> pixmap >> location;
-
- beginInsertRows(QModelIndex(), endRow, endRow);
- pixmaps.insert(endRow, pixmap);
- locations.insert(endRow, location);
- endInsertRows();
-
- ++endRow;
- }
-
- return true;
-}
-
-int PiecesModel::rowCount(const QModelIndex &parent) const
-{
- return parent.isValid() ? 0 : pixmaps.size();
-}
-
-Qt::DropActions PiecesModel::supportedDropActions() const
-{
- return Qt::CopyAction | Qt::MoveAction;
-}
-
-void PiecesModel::addPieces(const QPixmap &pixmap)
-{
- if (!pixmaps.isEmpty()) {
- beginRemoveRows(QModelIndex(), 0, pixmaps.size() - 1);
- pixmaps.clear();
- locations.clear();
- endRemoveRows();
- }
- for (int y = 0; y < 5; ++y) {
- for (int x = 0; x < 5; ++x) {
- QPixmap pieceImage = pixmap.copy(x*m_PieceSize, y*m_PieceSize, m_PieceSize, m_PieceSize);
- addPiece(pieceImage, QPoint(x, y));
- }
- }
-}