Initial import from the monolithic Qt.

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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

10 files changed, 785 insertions, 0 deletions

diff --git a/examples/draganddrop/puzzle/example.jpg b/examples/draganddrop/puzzle/example.jpg
new file mode 100644
index 0000000000..e09fb70757
--- /dev/null
+++ b/examples/draganddrop/puzzle/example.jpg
diff --git a/examples/draganddrop/puzzle/main.cpp b/examples/draganddrop/puzzle/main.cpp
new file mode 100644
index 0000000000..60341948ab
--- /dev/null
+++ b/examples/draganddrop/puzzle/main.cpp
@@ -0,0 +1,54 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QApplication>
+
+#include "mainwindow.h"
+
+int main(int argc, char *argv[])
+{
+    Q_INIT_RESOURCE(puzzle);
+
+    QApplication app(argc, argv);
+    MainWindow window;
+    window.openImage(":/images/example.jpg");
+    window.show();
+    return app.exec();
+}
diff --git a/examples/draganddrop/puzzle/mainwindow.cpp b/examples/draganddrop/puzzle/mainwindow.cpp
new file mode 100644
index 0000000000..ea7cff12ce
--- /dev/null
+++ b/examples/draganddrop/puzzle/mainwindow.cpp
@@ -0,0 +1,150 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+#include <stdlib.h>
+
+#include "mainwindow.h"
+#include "pieceslist.h"
+#include "puzzlewidget.h"
+
+MainWindow::MainWindow(QWidget *parent)
+    : QMainWindow(parent)
+{
+    setupMenus();
+    setupWidgets();
+
+    setSizePolicy(QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed));
+    setWindowTitle(tr("Puzzle"));
+}
+
+void MainWindow::openImage(const QString &path)
+{
+    QString fileName = path;
+
+    if (fileName.isNull())
+        fileName = QFileDialog::getOpenFileName(this,
+            tr("Open Image"), "", "Image Files (*.png *.jpg *.bmp)");
+
+    if (!fileName.isEmpty()) {
+        QPixmap newImage;
+        if (!newImage.load(fileName)) {
+            QMessageBox::warning(this, tr("Open Image"),
+                                  tr("The image file could not be loaded."),
+                                  QMessageBox::Cancel);
+            return;
+        }
+        puzzleImage = newImage;
+        setupPuzzle();
+    }
+}
+
+void MainWindow::setCompleted()
+{
+    QMessageBox::information(this, tr("Puzzle Completed"),
+        tr("Congratulations! You have completed the puzzle!\n"
+           "Click OK to start again."),
+        QMessageBox::Ok);
+
+    setupPuzzle();
+}
+
+void MainWindow::setupPuzzle()
+{
+    int size = qMin(puzzleImage.width(), puzzleImage.height());
+    puzzleImage = puzzleImage.copy((puzzleImage.width() - size)/2,
+        (puzzleImage.height() - size)/2, size, size).scaled(400,
+            400, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
+
+    piecesList->clear();
+
+    for (int y = 0; y < 5; ++y) {
+        for (int x = 0; x < 5; ++x) {
+            QPixmap pieceImage = puzzleImage.copy(x*80, y*80, 80, 80);
+            piecesList->addPiece(pieceImage, QPoint(x, y));
+        }
+    }
+
+    qsrand(QCursor::pos().x() ^ QCursor::pos().y());
+
+    for (int i = 0; i < piecesList->count(); ++i) {
+        if (int(2.0*qrand()/(RAND_MAX+1.0)) == 1) {
+            QListWidgetItem *item = piecesList->takeItem(i);
+            piecesList->insertItem(0, item);
+        }
+    }
+
+    puzzleWidget->clear();
+}
+
+void MainWindow::setupMenus()
+{
+    QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
+
+    QAction *openAction = fileMenu->addAction(tr("&Open..."));
+    openAction->setShortcuts(QKeySequence::Open);
+
+    QAction *exitAction = fileMenu->addAction(tr("E&xit"));
+    exitAction->setShortcuts(QKeySequence::Quit);
+
+    QMenu *gameMenu = menuBar()->addMenu(tr("&Game"));
+
+    QAction *restartAction = gameMenu->addAction(tr("&Restart"));
+
+    connect(openAction, SIGNAL(triggered()), this, SLOT(openImage()));
+    connect(exitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
+    connect(restartAction, SIGNAL(triggered()), this, SLOT(setupPuzzle()));
+}
+
+void MainWindow::setupWidgets()
+{
+    QFrame *frame = new QFrame;
+    QHBoxLayout *frameLayout = new QHBoxLayout(frame);
+
+    piecesList = new PiecesList;
+    puzzleWidget = new PuzzleWidget;
+
+    connect(puzzleWidget, SIGNAL(puzzleCompleted()),
+            this, SLOT(setCompleted()), Qt::QueuedConnection);
+
+    frameLayout->addWidget(piecesList);
+    frameLayout->addWidget(puzzleWidget);
+    setCentralWidget(frame);
+}
diff --git a/examples/draganddrop/puzzle/mainwindow.h b/examples/draganddrop/puzzle/mainwindow.h
new file mode 100644
index 0000000000..283ce97660
--- /dev/null
+++ b/examples/draganddrop/puzzle/mainwindow.h
@@ -0,0 +1,76 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QPixmap>
+#include <QMainWindow>
+
+class PiecesList;
+class PuzzleWidget;
+QT_BEGIN_NAMESPACE
+class QListWidgetItem;
+QT_END_NAMESPACE
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    MainWindow(QWidget *parent = 0);
+
+public slots:
+    void openImage(const QString &path = QString());
+    void setupPuzzle();
+
+private slots:
+    void setCompleted();
+
+private:
+    void setupMenus();
+    void setupWidgets();
+
+    QPixmap puzzleImage;
+    PiecesList *piecesList;
+    PuzzleWidget *puzzleWidget;
+};
+
+#endif
diff --git a/examples/draganddrop/puzzle/pieceslist.cpp b/examples/draganddrop/puzzle/pieceslist.cpp
new file mode 100644
index 0000000000..db27e7ad13
--- /dev/null
+++ b/examples/draganddrop/puzzle/pieceslist.cpp
@@ -0,0 +1,121 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "pieceslist.h"
+
+PiecesList::PiecesList(QWidget *parent)
+    : QListWidget(parent)
+{
+    setDragEnabled(true);
+    setViewMode(QListView::IconMode);
+    setIconSize(QSize(60, 60));
+    setSpacing(10);
+    setAcceptDrops(true);
+    setDropIndicatorShown(true);
+}
+
+void PiecesList::dragEnterEvent(QDragEnterEvent *event)
+{
+    if (event->mimeData()->hasFormat("image/x-puzzle-piece"))
+        event->accept();
+    else
+        event->ignore();
+}
+
+void PiecesList::dragMoveEvent(QDragMoveEvent *event)
+{
+    if (event->mimeData()->hasFormat("image/x-puzzle-piece")) {
+        event->setDropAction(Qt::MoveAction);
+        event->accept();
+    } else
+        event->ignore();
+}
+
+void PiecesList::dropEvent(QDropEvent *event)
+{
+    if (event->mimeData()->hasFormat("image/x-puzzle-piece")) {
+        QByteArray pieceData = event->mimeData()->data("image/x-puzzle-piece");
+        QDataStream dataStream(&pieceData, QIODevice::ReadOnly);
+        QPixmap pixmap;
+        QPoint location;
+        dataStream >> pixmap >> location;
+
+        addPiece(pixmap, location);
+
+        event->setDropAction(Qt::MoveAction);
+        event->accept();
+    } else
+        event->ignore();
+}
+
+void PiecesList::addPiece(QPixmap pixmap, QPoint location)
+{
+    QListWidgetItem *pieceItem = new QListWidgetItem(this);
+    pieceItem->setIcon(QIcon(pixmap));
+    pieceItem->setData(Qt::UserRole, QVariant(pixmap));
+    pieceItem->setData(Qt::UserRole+1, location);
+    pieceItem->setFlags(Qt::ItemIsEnabled | Qt::ItemIsSelectable
+                        | Qt::ItemIsDragEnabled);
+}
+
+void PiecesList::startDrag(Qt::DropActions /*supportedActions*/)
+{
+    QListWidgetItem *item = currentItem();
+
+    QByteArray itemData;
+    QDataStream dataStream(&itemData, QIODevice::WriteOnly);
+    QPixmap pixmap = qvariant_cast<QPixmap>(item->data(Qt::UserRole));
+    QPoint location = item->data(Qt::UserRole+1).toPoint();
+
+    dataStream << pixmap << location;
+
+    QMimeData *mimeData = new QMimeData;
+    mimeData->setData("image/x-puzzle-piece", itemData);
+
+    QDrag *drag = new QDrag(this);
+    drag->setMimeData(mimeData);
+    drag->setHotSpot(QPoint(pixmap.width()/2, pixmap.height()/2));
+    drag->setPixmap(pixmap);
+
+    if (drag->exec(Qt::MoveAction) == Qt::MoveAction)
+        delete takeItem(row(item));
+}
diff --git a/examples/draganddrop/puzzle/pieceslist.h b/examples/draganddrop/puzzle/pieceslist.h
new file mode 100644
index 0000000000..2068dceb17
--- /dev/null
+++ b/examples/draganddrop/puzzle/pieceslist.h
@@ -0,0 +1,61 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef PIECESLIST_H
+#define PIECESLIST_H
+
+#include <QListWidget>
+
+class PiecesList : public QListWidget
+{
+    Q_OBJECT
+
+public:
+    PiecesList(QWidget *parent = 0);
+    void addPiece(QPixmap pixmap, QPoint location);
+
+protected:
+    void dragEnterEvent(QDragEnterEvent *event);
+    void dragMoveEvent(QDragMoveEvent *event);
+    void dropEvent(QDropEvent *event);
+    void startDrag(Qt::DropActions supportedActions);
+};
+
+#endif
diff --git a/examples/draganddrop/puzzle/puzzle.pro b/examples/draganddrop/puzzle/puzzle.pro
new file mode 100644
index 0000000000..cb78a1da41
--- /dev/null
+++ b/examples/draganddrop/puzzle/puzzle.pro
@@ -0,0 +1,29 @@
+HEADERS     = mainwindow.h \
+              pieceslist.h \
+              puzzlewidget.h
+RESOURCES   = puzzle.qrc
+SOURCES     = main.cpp \
+              mainwindow.cpp \
+              pieceslist.cpp \
+              puzzlewidget.cpp
+
+QMAKE_PROJECT_NAME = dndpuzzle
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/qtbase/draganddrop/puzzle
+sources.files = $$SOURCES $$HEADERS $$RESOURCES *.pro *.jpg
+sources.path = $$[QT_INSTALL_EXAMPLES]/qtbase/draganddrop/puzzle
+INSTALLS += target sources
+
+symbian:{
+   TARGET.UID3 = 0xA000CF65
+   include($$QT_SOURCE_TREE/examples/symbianpkgrules.pri)
+   addFile.files = example.jpg
+   addFile.path = .
+   DEPLOYMENT += addFile
+}
+wince*: {
+   addFile.files = example.jpg
+   addFile.path = .
+   DEPLOYMENT += addFile
+}
diff --git a/examples/draganddrop/puzzle/puzzle.qrc b/examples/draganddrop/puzzle/puzzle.qrc
new file mode 100644
index 0000000000..4076cec026
--- /dev/null
+++ b/examples/draganddrop/puzzle/puzzle.qrc
@@ -0,0 +1,5 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource prefix="/images">
+   <file>example.jpg</file>
+</qresource>
+</RCC>
diff --git a/examples/draganddrop/puzzle/puzzlewidget.cpp b/examples/draganddrop/puzzle/puzzlewidget.cpp
new file mode 100644
index 0000000000..355c6d55cd
--- /dev/null
+++ b/examples/draganddrop/puzzle/puzzlewidget.cpp
@@ -0,0 +1,204 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "puzzlewidget.h"
+
+PuzzleWidget::PuzzleWidget(QWidget *parent)
+    : QWidget(parent)
+{
+    setAcceptDrops(true);
+    setMinimumSize(400, 400);
+    setMaximumSize(400, 400);
+}
+
+void PuzzleWidget::clear()
+{
+    pieceLocations.clear();
+    piecePixmaps.clear();
+    pieceRects.clear();
+    highlightedRect = QRect();
+    inPlace = 0;
+    update();
+}
+
+void PuzzleWidget::dragEnterEvent(QDragEnterEvent *event)
+{
+    if (event->mimeData()->hasFormat("image/x-puzzle-piece"))
+        event->accept();
+    else
+        event->ignore();
+}
+
+void PuzzleWidget::dragLeaveEvent(QDragLeaveEvent *event)
+{
+    QRect updateRect = highlightedRect;
+    highlightedRect = QRect();
+    update(updateRect);
+    event->accept();
+}
+
+void PuzzleWidget::dragMoveEvent(QDragMoveEvent *event)
+{
+    QRect updateRect = highlightedRect.unite(targetSquare(event->pos()));
+
+    if (event->mimeData()->hasFormat("image/x-puzzle-piece")
+        && findPiece(targetSquare(event->pos())) == -1) {
+
+        highlightedRect = targetSquare(event->pos());
+        event->setDropAction(Qt::MoveAction);
+        event->accept();
+    } else {
+        highlightedRect = QRect();
+        event->ignore();
+    }
+
+    update(updateRect);
+}
+
+void PuzzleWidget::dropEvent(QDropEvent *event)
+{
+    if (event->mimeData()->hasFormat("image/x-puzzle-piece")
+        && findPiece(targetSquare(event->pos())) == -1) {
+
+        QByteArray pieceData = event->mimeData()->data("image/x-puzzle-piece");
+        QDataStream dataStream(&pieceData, QIODevice::ReadOnly);
+        QRect square = targetSquare(event->pos());
+        QPixmap pixmap;
+        QPoint location;
+        dataStream >> pixmap >> location;
+
+        pieceLocations.append(location);
+        piecePixmaps.append(pixmap);
+        pieceRects.append(square);
+
+        highlightedRect = QRect();
+        update(square);
+
+        event->setDropAction(Qt::MoveAction);
+        event->accept();
+
+        if (location == QPoint(square.x()/80, square.y()/80)) {
+            inPlace++;
+            if (inPlace == 25)
+                emit puzzleCompleted();
+        }
+    } else {
+        highlightedRect = QRect();
+        event->ignore();
+    }
+}
+
+int PuzzleWidget::findPiece(const QRect &pieceRect) const
+{
+    for (int i = 0; i < pieceRects.size(); ++i) {
+        if (pieceRect == pieceRects[i]) {
+            return i;
+        }
+    }
+    return -1;
+}
+
+void PuzzleWidget::mousePressEvent(QMouseEvent *event)
+{
+    QRect square = targetSquare(event->pos());
+    int found = findPiece(square);
+
+    if (found == -1)
+        return;
+
+    QPoint location = pieceLocations[found];
+    QPixmap pixmap = piecePixmaps[found];
+    pieceLocations.removeAt(found);
+    piecePixmaps.removeAt(found);
+    pieceRects.removeAt(found);
+
+    if (location == QPoint(square.x()/80, square.y()/80))
+        inPlace--;
+
+    update(square);
+
+    QByteArray itemData;
+    QDataStream dataStream(&itemData, QIODevice::WriteOnly);
+
+    dataStream << pixmap << location;
+
+    QMimeData *mimeData = new QMimeData;
+    mimeData->setData("image/x-puzzle-piece", itemData);
+
+    QDrag *drag = new QDrag(this);
+    drag->setMimeData(mimeData);
+    drag->setHotSpot(event->pos() - square.topLeft());
+    drag->setPixmap(pixmap);
+
+    if (!(drag->exec(Qt::MoveAction) == Qt::MoveAction)) {
+        pieceLocations.insert(found, location);
+        piecePixmaps.insert(found, pixmap);
+        pieceRects.insert(found, square);
+        update(targetSquare(event->pos()));
+
+        if (location == QPoint(square.x()/80, square.y()/80))
+            inPlace++;
+    }
+}
+
+void PuzzleWidget::paintEvent(QPaintEvent *event)
+{
+    QPainter painter;
+    painter.begin(this);
+    painter.fillRect(event->rect(), Qt::white);
+
+    if (highlightedRect.isValid()) {
+        painter.setBrush(QColor("#ffcccc"));
+        painter.setPen(Qt::NoPen);
+        painter.drawRect(highlightedRect.adjusted(0, 0, -1, -1));
+    }
+
+    for (int i = 0; i < pieceRects.size(); ++i) {
+        painter.drawPixmap(pieceRects[i], piecePixmaps[i]);
+    }
+    painter.end();
+}
+
+const QRect PuzzleWidget::targetSquare(const QPoint &position) const
+{
+    return QRect(position.x()/80 * 80, position.y()/80 * 80, 80, 80);
+}
diff --git a/examples/draganddrop/puzzle/puzzlewidget.h b/examples/draganddrop/puzzle/puzzlewidget.h
new file mode 100644
index 0000000000..e0356b48fd
--- /dev/null
+++ b/examples/draganddrop/puzzle/puzzlewidget.h
@@ -0,0 +1,85 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef PUZZLEWIDGET_H
+#define PUZZLEWIDGET_H
+
+#include <QList>
+#include <QPoint>
+#include <QPixmap>
+#include <QWidget>
+
+QT_BEGIN_NAMESPACE
+class QDragEnterEvent;
+class QDropEvent;
+class QMouseEvent;
+QT_END_NAMESPACE
+
+class PuzzleWidget : public QWidget
+{
+    Q_OBJECT
+
+public:
+    PuzzleWidget(QWidget *parent = 0);
+    void clear();
+
+signals:
+    void puzzleCompleted();
+
+protected:
+    void dragEnterEvent(QDragEnterEvent *event);
+    void dragLeaveEvent(QDragLeaveEvent *event);
+    void dragMoveEvent(QDragMoveEvent *event);
+    void dropEvent(QDropEvent *event);
+    void mousePressEvent(QMouseEvent *event);
+    void paintEvent(QPaintEvent *event);
+
+private:
+    int findPiece(const QRect &pieceRect) const;
+    const QRect targetSquare(const QPoint &position) const;
+
+    QList<QPixmap> piecePixmaps;
+    QList<QRect> pieceRects;
+    QList<QPoint> pieceLocations;
+    QRect highlightedRect;
+    int inPlace;
+};
+
+#endif