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    41 

    42 #include <QtGui>

    43 

    44 #include "piecesmodel.h"

    45 

    46 PiecesModel::PiecesModel(QObject *parent)

    47     : QAbstractListModel(parent)

    48 {

    49 }

    50 

    51 QVariant PiecesModel::data(const QModelIndex &index, int role) const

    52 {

    53     if (!index.isValid())

    54         return QVariant();

    55 

    56     if (role == Qt::DecorationRole)

    57         return QIcon(pixmaps.value(index.row()).scaled(60, 60,

    58                          Qt::KeepAspectRatio, Qt::SmoothTransformation));

    59     else if (role == Qt::UserRole)

    60         return pixmaps.value(index.row());

    61     else if (role == Qt::UserRole + 1)

    62         return locations.value(index.row());

    63 

    64     return QVariant();

    65 }

    66 

    67 void PiecesModel::addPiece(const QPixmap &pixmap, const QPoint &location)

    68 {

    69     int row;

    70     if (int(2.0*qrand()/(RAND_MAX+1.0)) == 1)

    71         row = 0;

    72     else

    73         row = pixmaps.size();

    74 

    75     beginInsertRows(QModelIndex(), row, row);

    76     pixmaps.insert(row, pixmap);

    77     locations.insert(row, location);

    78     endInsertRows();

    79 }

    80 

    81 Qt::ItemFlags PiecesModel::flags(const QModelIndex &index) const

    82 {

    83     if (index.isValid())

    84         return (Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsDragEnabled);

    85 

    86     return Qt::ItemIsDropEnabled;

    87 }

    88 

    89 bool PiecesModel::removeRows(int row, int count, const QModelIndex &parent)

    90 {

    91     if (parent.isValid())

    92         return false;

    93 

    94     if (row >= pixmaps.size() || row + count <= 0)

    95         return false;

    96 

    97     int beginRow = qMax(0, row);

    98     int endRow = qMin(row + count - 1, pixmaps.size() - 1);

    99 

   100     beginRemoveRows(parent, beginRow, endRow);

   101 

   102     while (beginRow <= endRow) {

   103         pixmaps.removeAt(beginRow);

   104         locations.removeAt(beginRow);

   105         ++beginRow;

   106     }

   107 

   108     endRemoveRows();

   109     return true;

   110 }

   111 

   112 QStringList PiecesModel::mimeTypes() const

   113 {

   114     QStringList types;

   115     types << "image/x-puzzle-piece";

   116     return types;

   117 }

   118 

   119 QMimeData *PiecesModel::mimeData(const QModelIndexList &indexes) const

   120 {

   121     QMimeData *mimeData = new QMimeData();

   122     QByteArray encodedData;

   123 

   124     QDataStream stream(&encodedData, QIODevice::WriteOnly);

   125 

   126     foreach (QModelIndex index, indexes) {

   127         if (index.isValid()) {

   128             QPixmap pixmap = qVariantValue<QPixmap>(data(index, Qt::UserRole));

   129             QPoint location = data(index, Qt::UserRole+1).toPoint();

   130             stream << pixmap << location;

   131         }

   132     }

   133 

   134     mimeData->setData("image/x-puzzle-piece", encodedData);

   135     return mimeData;

   136 }

   137 

   138 bool PiecesModel::dropMimeData(const QMimeData *data, Qt::DropAction action,

   139                                int row, int column, const QModelIndex &parent)

   140 {

   141     if (!data->hasFormat("image/x-puzzle-piece"))

   142         return false;

   143 

   144     if (action == Qt::IgnoreAction)

   145         return true;

   146 

   147     if (column > 0)

   148         return false;

   149 

   150     int endRow;

   151 

   152     if (!parent.isValid()) {

   153         if (row < 0)

   154             endRow = pixmaps.size();

   155         else

   156             endRow = qMin(row, pixmaps.size());

   157     } else

   158         endRow = parent.row();

   159 

   160     QByteArray encodedData = data->data("image/x-puzzle-piece");

   161     QDataStream stream(&encodedData, QIODevice::ReadOnly);

   162 

   163     while (!stream.atEnd()) {

   164         QPixmap pixmap;

   165         QPoint location;

   166         stream >> pixmap >> location;

   167 

   168         beginInsertRows(QModelIndex(), endRow, endRow);

   169         pixmaps.insert(endRow, pixmap);

   170         locations.insert(endRow, location);

   171         endInsertRows();

   172 

   173         ++endRow;

   174     }

   175 

   176     return true;

   177 }

   178 

   179 int PiecesModel::rowCount(const QModelIndex &parent) const

   180 {

   181     if (parent.isValid())

   182         return 0;

   183     else

   184         return pixmaps.size();

   185 }

   186 

   187 Qt::DropActions PiecesModel::supportedDropActions() const

   188 {

   189     return Qt::CopyAction | Qt::MoveAction;

   190 }

   191 

   192 void PiecesModel::addPieces(const QPixmap& pixmap)

   193 {

   194     beginRemoveRows(QModelIndex(), 0, 24);

   195     pixmaps.clear();

   196     locations.clear();

   197     endRemoveRows();

   198     for (int y = 0; y < 5; ++y) {

   199         for (int x = 0; x < 5; ++x) {

   200             QPixmap pieceImage = pixmap.copy(x*80, y*80, 80, 80);

   201             addPiece(pieceImage, QPoint(x, y));

   202         }

   203     }

   204 }