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Diffstat (limited to 'examples/itemviews/puzzle/piecesmodel.cpp')
| -rw-r--r-- | examples/itemviews/puzzle/piecesmodel.cpp | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/examples/itemviews/puzzle/piecesmodel.cpp b/examples/itemviews/puzzle/piecesmodel.cpp new file mode 100644 index 0000000..f480837 --- /dev/null +++ b/examples/itemviews/puzzle/piecesmodel.cpp @@ -0,0 +1,204 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (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 either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtGui> + +#include "piecesmodel.h" + +PiecesModel::PiecesModel(QObject *parent) + : QAbstractListModel(parent) +{ +} + +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(60, 60, + 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 (int(2.0*qrand()/(RAND_MAX+1.0)) == 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 (Qt::ItemIsEnabled | Qt::ItemIsSelectable | 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, QIODevice::WriteOnly); + + foreach (QModelIndex index, indexes) { + if (index.isValid()) { + QPixmap pixmap = qVariantValue<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, QIODevice::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 +{ + if (parent.isValid()) + return 0; + else + return pixmaps.size(); +} + +Qt::DropActions PiecesModel::supportedDropActions() const +{ + return Qt::CopyAction | Qt::MoveAction; +} + +void PiecesModel::addPieces(const QPixmap& pixmap) +{ + beginRemoveRows(QModelIndex(), 0, 24); + pixmaps.clear(); + locations.clear(); + endRemoveRows(); + for (int y = 0; y < 5; ++y) { + for (int x = 0; x < 5; ++x) { + QPixmap pieceImage = pixmap.copy(x*80, y*80, 80, 80); + addPiece(pieceImage, QPoint(x, y)); + } + } +} |