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50
51#include "piecesmodel.h"
52
53#include <QIcon>
54#include <QMimeData>
55#include <QRandomGenerator>
56
57PiecesModel::PiecesModel(int pieceSize, QObject *parent)
58 : QAbstractListModel(parent), m_PieceSize(pieceSize)
59{
60}
61
62QVariant PiecesModel::data(const QModelIndex &index, int role) const
63{
64 if (!index.isValid())
65 return QVariant();
66
67 if (role == Qt::DecorationRole)
68 return QIcon(pixmaps.value(index.row()).scaled(m_PieceSize, m_PieceSize,
69 Qt::KeepAspectRatio, Qt::SmoothTransformation));
70 else if (role == Qt::UserRole)
71 return pixmaps.value(index.row());
72 else if (role == Qt::UserRole + 1)
73 return locations.value(index.row());
74
75 return QVariant();
76}
77
78void PiecesModel::addPiece(const QPixmap &pixmap, const QPoint &location)
79{
80 int row;
81 if (QRandomGenerator::global()->bounded(2) == 1)
82 row = 0;
83 else
84 row = pixmaps.size();
85
86 beginInsertRows(QModelIndex(), row, row);
87 pixmaps.insert(row, pixmap);
88 locations.insert(row, location);
89 endInsertRows();
90}
91
92Qt::ItemFlags PiecesModel::flags(const QModelIndex &index) const
93{
94 if (index.isValid())
95 return (QAbstractListModel::flags(index)|Qt::ItemIsDragEnabled);
96
97 return Qt::ItemIsDropEnabled;
98}
99
100bool PiecesModel::removeRows(int row, int count, const QModelIndex &parent)
101{
102 if (parent.isValid())
103 return false;
104
105 if (row >= pixmaps.size() || row + count <= 0)
106 return false;
107
108 int beginRow = qMax(0, row);
109 int endRow = qMin(row + count - 1, pixmaps.size() - 1);
110
111 beginRemoveRows(parent, beginRow, endRow);
112
113 while (beginRow <= endRow) {
114 pixmaps.removeAt(beginRow);
115 locations.removeAt(beginRow);
116 ++beginRow;
117 }
118
119 endRemoveRows();
120 return true;
121}
122
123QStringList PiecesModel::mimeTypes() const
124{
125 QStringList types;
126 types << "image/x-puzzle-piece";
127 return types;
128}
129
130QMimeData *PiecesModel::mimeData(const QModelIndexList &indexes) const
131{
132 QMimeData *mimeData = new QMimeData();
133 QByteArray encodedData;
134
135 QDataStream stream(&encodedData, QDataStream::WriteOnly);
136
137 for (const QModelIndex &index : indexes) {
138 if (index.isValid()) {
139 QPixmap pixmap = qvariant_cast<QPixmap>(data(index, Qt::UserRole));
140 QPoint location = data(index, Qt::UserRole+1).toPoint();
141 stream << pixmap << location;
142 }
143 }
144
145 mimeData->setData("image/x-puzzle-piece", encodedData);
146 return mimeData;
147}
148
149bool PiecesModel::dropMimeData(const QMimeData *data, Qt::DropAction action,
150 int row, int column, const QModelIndex &parent)
151{
152 if (!data->hasFormat("image/x-puzzle-piece"))
153 return false;
154
155 if (action == Qt::IgnoreAction)
156 return true;
157
158 if (column > 0)
159 return false;
160
161 int endRow;
162
163 if (!parent.isValid()) {
164 if (row < 0)
165 endRow = pixmaps.size();
166 else
167 endRow = qMin(row, pixmaps.size());
168 } else {
169 endRow = parent.row();
170 }
171
172 QByteArray encodedData = data->data("image/x-puzzle-piece");
173 QDataStream stream(&encodedData, QDataStream::ReadOnly);
174
175 while (!stream.atEnd()) {
176 QPixmap pixmap;
177 QPoint location;
178 stream >> pixmap >> location;
179
180 beginInsertRows(QModelIndex(), endRow, endRow);
181 pixmaps.insert(endRow, pixmap);
182 locations.insert(endRow, location);
183 endInsertRows();
184
185 ++endRow;
186 }
187
188 return true;
189}
190
191int PiecesModel::rowCount(const QModelIndex &parent) const
192{
193 return parent.isValid() ? 0 : pixmaps.size();
194}
195
196Qt::DropActions PiecesModel::supportedDropActions() const
197{
198 return Qt::CopyAction | Qt::MoveAction;
199}
200
201void PiecesModel::addPieces(const QPixmap &pixmap)
202{
203 if (!pixmaps.isEmpty()) {
204 beginRemoveRows(QModelIndex(), 0, pixmaps.size() - 1);
205 pixmaps.clear();
206 locations.clear();
207 endRemoveRows();
208 }
209 for (int y = 0; y < 5; ++y) {
210 for (int x = 0; x < 5; ++x) {
211 QPixmap pieceImage = pixmap.copy(x*m_PieceSize, y*m_PieceSize, m_PieceSize, m_PieceSize);
212 addPiece(pieceImage, QPoint(x, y));
213 }
214 }
215}
216