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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** 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 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 http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#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));
}
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