/**************************************************************************** ** ** 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://qt.nokia.com/contact. ** $QT_END_LICENSE$ ** ****************************************************************************/ #include #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(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)); }