2011-04-27 10:05:43 +00:00
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/****************************************************************************
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**
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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** the names of its contributors may be used to endorse or promote
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** products derived from this software without specific prior written
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** permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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2011-05-07 20:57:49 +00:00
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#include <QtWidgets>
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2011-04-27 10:05:43 +00:00
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#include "puzzlewidget.h"
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2011-04-27 17:16:41 +00:00
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PuzzleWidget::PuzzleWidget(int imageSize, QWidget *parent)
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: QWidget(parent), m_ImageSize(imageSize)
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2011-04-27 10:05:43 +00:00
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{
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setAcceptDrops(true);
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2011-04-27 17:16:41 +00:00
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setMinimumSize(m_ImageSize, m_ImageSize);
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setMaximumSize(m_ImageSize, m_ImageSize);
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2011-04-27 10:05:43 +00:00
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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 stream(&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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stream >> 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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2011-04-27 17:16:41 +00:00
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if (location == QPoint(square.x()/pieceSize(), square.y()/pieceSize())) {
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2011-04-27 10:05:43 +00:00
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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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2011-04-27 17:16:41 +00:00
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if (location == QPoint(square.x()/pieceSize(), square.y()/pieceSize()))
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2011-04-27 10:05:43 +00:00
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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->start(Qt::MoveAction) == 0) {
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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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2011-04-27 17:16:41 +00:00
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if (location == QPoint(square.x()/pieceSize(), square.y()/pieceSize()))
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2011-04-27 10:05:43 +00:00
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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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2011-04-27 17:16:41 +00:00
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return QRect(position.x()/pieceSize() * pieceSize(), position.y()/pieceSize() * pieceSize(), pieceSize(), pieceSize());
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}
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int PuzzleWidget::pieceSize() const
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{
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return m_ImageSize / 5;
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}
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int PuzzleWidget::imageSize() const
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{
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return m_ImageSize;
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2011-04-27 10:05:43 +00:00
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}
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