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202 lines
5.8 KiB
C++
202 lines
5.8 KiB
C++
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/****************************************************************************
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**
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** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: Qt Software Information (qt-info@nokia.com)
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**
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** This file is part of the example classes of the Qt Toolkit.
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**
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** Commercial Usage
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License versions 2.0 or 3.0 as published by the Free
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** Software Foundation and appearing in the file LICENSE.GPL included in
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** the packaging of this file. Please review the following information
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** to ensure GNU General Public Licensing requirements will be met:
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** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
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** http://www.gnu.org/copyleft/gpl.html. In addition, as a special
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** exception, Nokia gives you certain additional rights. These rights
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** are described in the Nokia Qt GPL Exception version 1.3, included in
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** the file GPL_EXCEPTION.txt in this package.
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**
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** Qt for Windows(R) Licensees
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** As a special exception, Nokia, as the sole copyright holder for Qt
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** Designer, grants users of the Qt/Eclipse Integration plug-in the
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** right for the Qt/Eclipse Integration to link to functionality
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** provided by Qt Designer and its related libraries.
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**
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** If you are unsure which license is appropriate for your use, please
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** contact the sales department at qt-sales@nokia.com.
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**
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****************************************************************************/
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#include <QtGui>
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#include "puzzlewidget.h"
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PuzzleWidget::PuzzleWidget(QWidget *parent)
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: QWidget(parent)
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{
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setAcceptDrops(true);
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setMinimumSize(400, 400);
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setMaximumSize(400, 400);
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}
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void PuzzleWidget::clear()
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{
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pieceLocations.clear();
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piecePixmaps.clear();
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pieceRects.clear();
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highlightedRect = QRect();
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inPlace = 0;
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update();
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}
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void PuzzleWidget::dragEnterEvent(QDragEnterEvent *event)
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{
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if (event->mimeData()->hasFormat("image/x-puzzle-piece"))
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event->accept();
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else
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event->ignore();
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}
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void PuzzleWidget::dragLeaveEvent(QDragLeaveEvent *event)
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{
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QRect updateRect = highlightedRect;
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highlightedRect = QRect();
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update(updateRect);
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event->accept();
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}
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void PuzzleWidget::dragMoveEvent(QDragMoveEvent *event)
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{
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QRect updateRect = highlightedRect.unite(targetSquare(event->pos()));
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if (event->mimeData()->hasFormat("image/x-puzzle-piece")
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&& findPiece(targetSquare(event->pos())) == -1) {
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highlightedRect = targetSquare(event->pos());
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event->setDropAction(Qt::MoveAction);
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event->accept();
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} else {
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highlightedRect = QRect();
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event->ignore();
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}
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update(updateRect);
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}
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void PuzzleWidget::dropEvent(QDropEvent *event)
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{
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if (event->mimeData()->hasFormat("image/x-puzzle-piece")
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&& findPiece(targetSquare(event->pos())) == -1) {
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QByteArray pieceData = event->mimeData()->data("image/x-puzzle-piece");
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QDataStream dataStream(&pieceData, QIODevice::ReadOnly);
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QRect square = targetSquare(event->pos());
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QPixmap pixmap;
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QPoint location;
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dataStream >> pixmap >> location;
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pieceLocations.append(location);
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piecePixmaps.append(pixmap);
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pieceRects.append(square);
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highlightedRect = QRect();
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update(square);
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event->setDropAction(Qt::MoveAction);
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event->accept();
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if (location == QPoint(square.x()/80, square.y()/80)) {
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inPlace++;
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if (inPlace == 25)
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emit puzzleCompleted();
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}
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} else {
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highlightedRect = QRect();
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event->ignore();
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}
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}
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int PuzzleWidget::findPiece(const QRect &pieceRect) const
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{
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for (int i = 0; i < pieceRects.size(); ++i) {
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if (pieceRect == pieceRects[i]) {
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return i;
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}
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}
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return -1;
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}
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void PuzzleWidget::mousePressEvent(QMouseEvent *event)
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{
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QRect square = targetSquare(event->pos());
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int found = findPiece(square);
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if (found == -1)
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return;
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QPoint location = pieceLocations[found];
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QPixmap pixmap = piecePixmaps[found];
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pieceLocations.removeAt(found);
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piecePixmaps.removeAt(found);
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pieceRects.removeAt(found);
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if (location == QPoint(square.x()/80, square.y()/80))
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inPlace--;
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update(square);
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QByteArray itemData;
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QDataStream dataStream(&itemData, QIODevice::WriteOnly);
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dataStream << pixmap << location;
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QMimeData *mimeData = new QMimeData;
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mimeData->setData("image/x-puzzle-piece", itemData);
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QDrag *drag = new QDrag(this);
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drag->setMimeData(mimeData);
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drag->setHotSpot(event->pos() - square.topLeft());
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drag->setPixmap(pixmap);
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if (!(drag->exec(Qt::MoveAction) == Qt::MoveAction)) {
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pieceLocations.insert(found, location);
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piecePixmaps.insert(found, pixmap);
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pieceRects.insert(found, square);
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update(targetSquare(event->pos()));
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if (location == QPoint(square.x()/80, square.y()/80))
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inPlace++;
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}
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}
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void PuzzleWidget::paintEvent(QPaintEvent *event)
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{
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QPainter painter;
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painter.begin(this);
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painter.fillRect(event->rect(), Qt::white);
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if (highlightedRect.isValid()) {
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painter.setBrush(QColor("#ffcccc"));
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painter.setPen(Qt::NoPen);
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painter.drawRect(highlightedRect.adjusted(0, 0, -1, -1));
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}
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for (int i = 0; i < pieceRects.size(); ++i) {
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painter.drawPixmap(pieceRects[i], piecePixmaps[i]);
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}
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painter.end();
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}
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const QRect PuzzleWidget::targetSquare(const QPoint &position) const
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{
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return QRect(position.x()/80 * 80, position.y()/80 * 80, 80, 80);
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}
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