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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the examples of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #include <QtGui> |
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43 |
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44 #include "puzzlewidget.h" |
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45 |
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46 PuzzleWidget::PuzzleWidget(QWidget *parent) |
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47 : QWidget(parent) |
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48 { |
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49 setAcceptDrops(true); |
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50 setMinimumSize(400, 400); |
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51 setMaximumSize(400, 400); |
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52 } |
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53 |
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54 void PuzzleWidget::clear() |
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55 { |
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56 pieceLocations.clear(); |
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57 piecePixmaps.clear(); |
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58 pieceRects.clear(); |
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59 highlightedRect = QRect(); |
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60 inPlace = 0; |
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61 update(); |
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62 } |
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63 |
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64 void PuzzleWidget::dragEnterEvent(QDragEnterEvent *event) |
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65 { |
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66 if (event->mimeData()->hasFormat("image/x-puzzle-piece")) |
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67 event->accept(); |
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68 else |
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69 event->ignore(); |
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70 } |
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71 |
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72 void PuzzleWidget::dragLeaveEvent(QDragLeaveEvent *event) |
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73 { |
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74 QRect updateRect = highlightedRect; |
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75 highlightedRect = QRect(); |
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76 update(updateRect); |
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77 event->accept(); |
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78 } |
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79 |
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80 void PuzzleWidget::dragMoveEvent(QDragMoveEvent *event) |
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81 { |
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82 QRect updateRect = highlightedRect.unite(targetSquare(event->pos())); |
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83 |
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84 if (event->mimeData()->hasFormat("image/x-puzzle-piece") |
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85 && findPiece(targetSquare(event->pos())) == -1) { |
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86 |
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87 highlightedRect = targetSquare(event->pos()); |
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88 event->setDropAction(Qt::MoveAction); |
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89 event->accept(); |
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90 } else { |
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91 highlightedRect = QRect(); |
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92 event->ignore(); |
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93 } |
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94 |
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95 update(updateRect); |
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96 } |
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97 |
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98 void PuzzleWidget::dropEvent(QDropEvent *event) |
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99 { |
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100 if (event->mimeData()->hasFormat("image/x-puzzle-piece") |
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101 && findPiece(targetSquare(event->pos())) == -1) { |
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102 |
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103 QByteArray pieceData = event->mimeData()->data("image/x-puzzle-piece"); |
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104 QDataStream dataStream(&pieceData, QIODevice::ReadOnly); |
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105 QRect square = targetSquare(event->pos()); |
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106 QPixmap pixmap; |
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107 QPoint location; |
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108 dataStream >> pixmap >> location; |
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109 |
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110 pieceLocations.append(location); |
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111 piecePixmaps.append(pixmap); |
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112 pieceRects.append(square); |
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113 |
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114 highlightedRect = QRect(); |
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115 update(square); |
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116 |
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117 event->setDropAction(Qt::MoveAction); |
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118 event->accept(); |
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119 |
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120 if (location == QPoint(square.x()/80, square.y()/80)) { |
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121 inPlace++; |
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122 if (inPlace == 25) |
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123 emit puzzleCompleted(); |
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124 } |
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125 } else { |
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126 highlightedRect = QRect(); |
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127 event->ignore(); |
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128 } |
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129 } |
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130 |
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131 int PuzzleWidget::findPiece(const QRect &pieceRect) const |
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132 { |
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133 for (int i = 0; i < pieceRects.size(); ++i) { |
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134 if (pieceRect == pieceRects[i]) { |
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135 return i; |
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136 } |
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137 } |
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138 return -1; |
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139 } |
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140 |
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141 void PuzzleWidget::mousePressEvent(QMouseEvent *event) |
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142 { |
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143 QRect square = targetSquare(event->pos()); |
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144 int found = findPiece(square); |
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145 |
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146 if (found == -1) |
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147 return; |
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148 |
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149 QPoint location = pieceLocations[found]; |
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150 QPixmap pixmap = piecePixmaps[found]; |
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151 pieceLocations.removeAt(found); |
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152 piecePixmaps.removeAt(found); |
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153 pieceRects.removeAt(found); |
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154 |
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155 if (location == QPoint(square.x()/80, square.y()/80)) |
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156 inPlace--; |
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157 |
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158 update(square); |
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159 |
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160 QByteArray itemData; |
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161 QDataStream dataStream(&itemData, QIODevice::WriteOnly); |
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162 |
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163 dataStream << pixmap << location; |
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164 |
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165 QMimeData *mimeData = new QMimeData; |
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166 mimeData->setData("image/x-puzzle-piece", itemData); |
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167 |
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168 QDrag *drag = new QDrag(this); |
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169 drag->setMimeData(mimeData); |
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170 drag->setHotSpot(event->pos() - square.topLeft()); |
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171 drag->setPixmap(pixmap); |
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172 |
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173 if (!(drag->exec(Qt::MoveAction) == Qt::MoveAction)) { |
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174 pieceLocations.insert(found, location); |
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175 piecePixmaps.insert(found, pixmap); |
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176 pieceRects.insert(found, square); |
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177 update(targetSquare(event->pos())); |
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178 |
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179 if (location == QPoint(square.x()/80, square.y()/80)) |
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180 inPlace++; |
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181 } |
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182 } |
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183 |
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184 void PuzzleWidget::paintEvent(QPaintEvent *event) |
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185 { |
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186 QPainter painter; |
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187 painter.begin(this); |
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188 painter.fillRect(event->rect(), Qt::white); |
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189 |
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190 if (highlightedRect.isValid()) { |
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191 painter.setBrush(QColor("#ffcccc")); |
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192 painter.setPen(Qt::NoPen); |
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193 painter.drawRect(highlightedRect.adjusted(0, 0, -1, -1)); |
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194 } |
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195 |
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196 for (int i = 0; i < pieceRects.size(); ++i) { |
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197 painter.drawPixmap(pieceRects[i], piecePixmaps[i]); |
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198 } |
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199 painter.end(); |
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200 } |
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201 |
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202 const QRect PuzzleWidget::targetSquare(const QPoint &position) const |
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203 { |
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204 return QRect(position.x()/80 * 80, position.y()/80 * 80, 80, 80); |
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205 } |