windows平台下C++语言完成的QT拼图游戏

#include "piecesmodel.h" #include <QIcon> #include <QMimeData> PiecesModel::PiecesModel(int pieceSize, QObject *parent) : QAbstractListModel(parent), m_PieceSize(pieceSize) { } // override function of abstract list model // read data by data role of the current model index QVariant PiecesModel::data(const QModelIndex &index, int role) const { if (!index.isValid()) return QVariant(); // get the image of small piece from the list model if (role == Qt::DecorationRole) return QIcon(pixmaps.value(index.row()).scaled(m_PieceSize, m_PieceSize, Qt::KeepAspectRatio, Qt::SmoothTransformation)); // get the image current rows else if (role == Qt::UserRole) return pixmaps.value(index.row()); // get the corrent position else if (role == Qt::UserRole + 1) return locations.value(index.row()); return QVariant(); } // insert one piece image into list model 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 { // set the every piece image could be draged if (index.isValid()) return (QAbstractListModel::flags(index) | Qt::ItemIsDragEnabled); return Qt::ItemIsDropEnabled; } // remove the data from the list model 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); // do the remove all piece images from data model while (beginRow <= endRow) { pixmaps.removeAt(beginRow); locations.removeAt(beginRow); ++beginRow; } endRemoveRows(); return true; } // override funcution of QAbstractListModel 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()) { // wirte the image and corrent position into Mime Data QPixmap pixmap = qvariant_cast<QPixmap>(data(index, Qt::UserRole)); QPoint location = data(index, Qt::UserRole+1).toPoint(); stream << pixmap << location; } } // set the all images into mime data mimeData->setData("image/x-puzzle-piece", encodedData); return mimeData; } // override function of QAbstractListModel // Handles the data supplied by a drag and drop operation that ended // with the given action. 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(); } // Returns the data stored in the object in the format described // by the MIME type specified by mimeType. QByteArray encodedData = data->data("image/x-puzzle-piece"); QDataStream stream(&encodedData, QIODevice::ReadOnly); while (!stream.atEnd()) { QPixmap pixmap; QPoint location; // read the pixmap & the image position from the Droped mime data stream >> pixmap >> location; // add the current pixmap and the position data beginInsertRows(QModelIndex(), endRow, endRow); pixmaps.insert(endRow, pixmap); locations.insert(endRow, location); endInsertRows(); ++endRow; } return true; } // override function of QAbstractListModel // Returns the number of rows under the given parent. // When the parent is valid it means that rowCount is returning the number of children of parent. int PiecesModel::rowCount(const QModelIndex &parent) const { if (parent.isValid()) return 0; else return pixmaps.size(); } // override function of QAbstractListModel // Returns the drop actions supported by this model. Qt::DropActions PiecesModel::supportedDropActions() const { return Qt::CopyAction | Qt::MoveAction; } void PiecesModel::addPieces(const QPixmap& pixmap) { // clear the image pieces list beginRemoveRows(QModelIndex(), 0, 24); pixmaps.clear(); locations.clear(); endRemoveRows(); // split the image into a martix: 5 x 5 // there will have 25 piece images for (int y = 0; y < 5; ++y) { for (int x = 0; x < 5; ++x) { // split out one piece image QPixmap pieceImage = pixmap.copy(x*m_PieceSize, y*m_PieceSize, m_PieceSize, m_PieceSize); // add this piece image into image pieces list, into data model // every piece image has only one correct position, this used for check the result addPiece(pieceImage, QPoint(x, y)); } } }