Move drag and drop puzzle example to manual test

Pick-to: 6.5 6.6
Change-Id: I859cdb2cf74cd6272c29924c77dab26b4f4c0b6c
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

16 files changed, 1 insertions, 609 deletions

diff --git a/examples/widgets/doc/images/draganddroppuzzle-example.png b/examples/widgets/doc/images/draganddroppuzzle-example.png
deleted file mode 100644
index ca6844581e..0000000000
--- a/examples/widgets/doc/images/draganddroppuzzle-example.png
+++ /dev/null
diff --git a/examples/widgets/doc/src/draganddroppuzzle.qdoc b/examples/widgets/doc/src/draganddroppuzzle.qdoc
deleted file mode 100644
index c2504b245b..0000000000
--- a/examples/widgets/doc/src/draganddroppuzzle.qdoc
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
-
-/*!
-    \example draganddrop/puzzle
-    \title Drag and Drop Puzzle Example
-
-    \brief The Drag and Drop Puzzle example demonstrates a way of using the drag and drop system with
-    item view widgets.
-
-    \image draganddroppuzzle-example.png
-
-    This example is an implementation of a simple jigsaw puzzle game using Qt's
-    drag and drop API.
-    The \l{Item Views Puzzle Example}{Item View Puzzle} example shows
-    many of the same features, but takes an alternative approach that uses Qt's
-    model/view framework to manage drag and drop operations.
-*/
diff --git a/examples/widgets/doc/src/itemviewspuzzle.qdoc b/examples/widgets/doc/src/itemviewspuzzle.qdoc
index c1e0c361d6..9e77caf87e 100644
--- a/examples/widgets/doc/src/itemviewspuzzle.qdoc
+++ b/examples/widgets/doc/src/itemviewspuzzle.qdoc
@@ -12,8 +12,4 @@
 
     This example is an implementation of a simple jigsaw puzzle game using the
     built-in support for drag and drop provided by Qt's model/view framework.
-    The \l{Drag and Drop Puzzle Example}{Drag and Drop Puzzle} example shows
-    many of the same features, but takes an alternative approach that uses Qt's
-    drag and drop API at the application level to handle drag and drop
-    operations.
 */
diff --git a/examples/widgets/draganddrop/CMakeLists.txt b/examples/widgets/draganddrop/CMakeLists.txt
index c75600f660..88d571d31e 100644
--- a/examples/widgets/draganddrop/CMakeLists.txt
+++ b/examples/widgets/draganddrop/CMakeLists.txt
@@ -5,4 +5,3 @@ qt_internal_add_example(draggableicons)
 qt_internal_add_example(draggabletext)
 qt_internal_add_example(dropsite)
 qt_internal_add_example(fridgemagnets)
-qt_internal_add_example(puzzle)
diff --git a/examples/widgets/draganddrop/draganddrop.pro b/examples/widgets/draganddrop/draganddrop.pro
index 1ecafd33a1..e62a0a59d0 100644
--- a/examples/widgets/draganddrop/draganddrop.pro
+++ b/examples/widgets/draganddrop/draganddrop.pro
@@ -2,5 +2,4 @@ TEMPLATE    = subdirs
 SUBDIRS     = draggableicons \
               draggabletext \
               dropsite \
-              fridgemagnets \
-              puzzle
+              fridgemagnets
diff --git a/examples/widgets/draganddrop/puzzle/CMakeLists.txt b/examples/widgets/draganddrop/puzzle/CMakeLists.txt
deleted file mode 100644
index 13c6717551..0000000000
--- a/examples/widgets/draganddrop/puzzle/CMakeLists.txt
+++ /dev/null
@@ -1,51 +0,0 @@
-# Copyright (C) 2022 The Qt Company Ltd.
-# SPDX-License-Identifier: BSD-3-Clause
-
-cmake_minimum_required(VERSION 3.16)
-project(puzzle LANGUAGES CXX)
-
-if(NOT DEFINED INSTALL_EXAMPLESDIR)
-    set(INSTALL_EXAMPLESDIR "examples")
-endif()
-
-set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/widgets/draganddrop_puzzle")
-
-find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets)
-
-qt_standard_project_setup()
-
-qt_add_executable(draganddrop_puzzle
-    main.cpp
-    mainwindow.cpp mainwindow.h
-    pieceslist.cpp pieceslist.h
-    puzzlewidget.cpp puzzlewidget.h
-)
-
-set_target_properties(draganddrop_puzzle PROPERTIES
-    WIN32_EXECUTABLE TRUE
-    MACOSX_BUNDLE TRUE
-)
-
-target_link_libraries(draganddrop_puzzle PRIVATE
-    Qt6::Core
-    Qt6::Gui
-    Qt6::Widgets
-)
-
-# Resources:
-set(puzzle_resource_files
-    "example.jpg"
-)
-
-qt_add_resources(draganddrop_puzzle "puzzle"
-    PREFIX
-        "/images"
-    FILES
-        ${puzzle_resource_files}
-)
-
-install(TARGETS draganddrop_puzzle
-    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
-    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
-    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
-)
diff --git a/examples/widgets/draganddrop/puzzle/example.jpg b/examples/widgets/draganddrop/puzzle/example.jpg
deleted file mode 100644
index 023203c57a..0000000000
--- a/examples/widgets/draganddrop/puzzle/example.jpg
+++ /dev/null
diff --git a/examples/widgets/draganddrop/puzzle/main.cpp b/examples/widgets/draganddrop/puzzle/main.cpp
deleted file mode 100644
index 32e219256a..0000000000
--- a/examples/widgets/draganddrop/puzzle/main.cpp
+++ /dev/null
@@ -1,15 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
-
-#include "mainwindow.h"
-
-#include <QApplication>
-
-int main(int argc, char *argv[])
-{
-    QApplication app(argc, argv);
-    MainWindow window;
-    window.loadImage(QStringLiteral(":/images/example.jpg"));
-    window.show();
-    return app.exec();
-}
diff --git a/examples/widgets/draganddrop/puzzle/mainwindow.cpp b/examples/widgets/draganddrop/puzzle/mainwindow.cpp
deleted file mode 100644
index b34bc24201..0000000000
--- a/examples/widgets/draganddrop/puzzle/mainwindow.cpp
+++ /dev/null
@@ -1,118 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
-
-#include "mainwindow.h"
-#include "pieceslist.h"
-#include "puzzlewidget.h"
-
-#include <QtWidgets>
-#include <stdlib.h>
-
-MainWindow::MainWindow(QWidget *parent)
-    : QMainWindow(parent)
-{
-    setupMenus();
-    setupWidgets();
-
-    setSizePolicy(QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed));
-    setWindowTitle(tr("Puzzle"));
-}
-
-void MainWindow::openImage()
-{
-    const QString directory =
-        QStandardPaths::standardLocations(QStandardPaths::PicturesLocation).value(0, QDir::homePath());
-    QFileDialog dialog(this, tr("Open Image"), directory);
-    dialog.setAcceptMode(QFileDialog::AcceptOpen);
-    dialog.setFileMode(QFileDialog::ExistingFile);
-    QStringList mimeTypeFilters;
-    for (const QByteArray &mimeTypeName : QImageReader::supportedMimeTypes())
-        mimeTypeFilters.append(mimeTypeName);
-    mimeTypeFilters.sort();
-    dialog.setMimeTypeFilters(mimeTypeFilters);
-    dialog.selectMimeTypeFilter("image/jpeg");
-    if (dialog.exec() == QDialog::Accepted)
-        loadImage(dialog.selectedFiles().constFirst());
-}
-
-void MainWindow::loadImage(const QString &fileName)
-{
-    QPixmap newImage;
-    if (!newImage.load(fileName)) {
-        QMessageBox::warning(this, tr("Open Image"),
-                             tr("The image file could not be loaded."),
-                             QMessageBox::Close);
-        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(puzzleWidget->width(),
-            puzzleWidget->height(), Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
-
-    piecesList->clear();
-
-    for (int y = 0; y < 5; ++y) {
-        for (int x = 0; x < 5; ++x) {
-            int pieceSize = puzzleWidget->pieceSize();
-            QPixmap pieceImage = puzzleImage.copy(x * pieceSize, y * pieceSize, pieceSize, pieceSize);
-            piecesList->addPiece(pieceImage, QPoint(x, y));
-        }
-    }
-
-    for (int i = 0; i < piecesList->count(); ++i) {
-        if (QRandomGenerator::global()->bounded(2) == 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..."), this, &MainWindow::openImage);
-    openAction->setShortcuts(QKeySequence::Open);
-
-    QAction *exitAction = fileMenu->addAction(tr("E&xit"), qApp, &QCoreApplication::quit);
-    exitAction->setShortcuts(QKeySequence::Quit);
-
-    QMenu *gameMenu = menuBar()->addMenu(tr("&Game"));
-
-    gameMenu->addAction(tr("&Restart"), this, &MainWindow::setupPuzzle);
-}
-
-void MainWindow::setupWidgets()
-{
-    QFrame *frame = new QFrame;
-    QHBoxLayout *frameLayout = new QHBoxLayout(frame);
-    puzzleWidget = new PuzzleWidget(400);
-
-    piecesList = new PiecesList(puzzleWidget->pieceSize(), this);
-
-
-    connect(puzzleWidget, &PuzzleWidget::puzzleCompleted,
-            this, &MainWindow::setCompleted, Qt::QueuedConnection);
-
-    frameLayout->addWidget(piecesList);
-    frameLayout->addWidget(puzzleWidget);
-    setCentralWidget(frame);
-}
diff --git a/examples/widgets/draganddrop/puzzle/mainwindow.h b/examples/widgets/draganddrop/puzzle/mainwindow.h
deleted file mode 100644
index 83a441c722..0000000000
--- a/examples/widgets/draganddrop/puzzle/mainwindow.h
+++ /dev/null
@@ -1,40 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
-
-#ifndef MAINWINDOW_H
-#define MAINWINDOW_H
-
-#include <QMainWindow>
-#include <QPixmap>
-
-class PiecesList;
-class PuzzleWidget;
-QT_BEGIN_NAMESPACE
-class QListWidgetItem;
-QT_END_NAMESPACE
-
-class MainWindow : public QMainWindow
-{
-    Q_OBJECT
-
-public:
-    explicit MainWindow(QWidget *parent = nullptr);
-    void loadImage(const QString &path);
-
-public slots:
-    void openImage();
-    void setupPuzzle();
-
-private slots:
-    void setCompleted();
-
-private:
-    void setupMenus();
-    void setupWidgets();
-
-    QPixmap puzzleImage;
-    PiecesList *piecesList;
-    PuzzleWidget *puzzleWidget;
-};
-
-#endif // MAINWINDOW_H
diff --git a/examples/widgets/draganddrop/puzzle/pieceslist.cpp b/examples/widgets/draganddrop/puzzle/pieceslist.cpp
deleted file mode 100644
index 0c7e771e42..0000000000
--- a/examples/widgets/draganddrop/puzzle/pieceslist.cpp
+++ /dev/null
@@ -1,87 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
-
-#include "pieceslist.h"
-
-#include <QDrag>
-#include <QDragEnterEvent>
-#include <QMimeData>
-
-PiecesList::PiecesList(int pieceSize, QWidget *parent)
-    : QListWidget(parent), m_PieceSize(pieceSize)
-{
-    setDragEnabled(true);
-    setViewMode(QListView::IconMode);
-    setIconSize(QSize(m_PieceSize, m_PieceSize));
-    setSpacing(10);
-    setAcceptDrops(true);
-    setDropIndicatorShown(true);
-}
-
-void PiecesList::dragEnterEvent(QDragEnterEvent *event)
-{
-    if (event->mimeData()->hasFormat(PiecesList::puzzleMimeType()))
-        event->accept();
-    else
-        event->ignore();
-}
-
-void PiecesList::dragMoveEvent(QDragMoveEvent *event)
-{
-    if (event->mimeData()->hasFormat(PiecesList::puzzleMimeType())) {
-        event->setDropAction(Qt::MoveAction);
-        event->accept();
-    } else {
-        event->ignore();
-    }
-}
-
-void PiecesList::dropEvent(QDropEvent *event)
-{
-    if (event->mimeData()->hasFormat(PiecesList::puzzleMimeType())) {
-        QByteArray pieceData = event->mimeData()->data(PiecesList::puzzleMimeType());
-        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(const QPixmap &pixmap, const 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(PiecesList::puzzleMimeType(), 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/widgets/draganddrop/puzzle/pieceslist.h b/examples/widgets/draganddrop/puzzle/pieceslist.h
deleted file mode 100644
index 4c617e7006..0000000000
--- a/examples/widgets/draganddrop/puzzle/pieceslist.h
+++ /dev/null
@@ -1,28 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
-
-#ifndef PIECESLIST_H
-#define PIECESLIST_H
-
-#include <QListWidget>
-
-class PiecesList : public QListWidget
-{
-    Q_OBJECT
-
-public:
-    explicit PiecesList(int pieceSize, QWidget *parent = nullptr);
-    void addPiece(const QPixmap &pixmap, const QPoint &location);
-
-    static QString puzzleMimeType() { return QStringLiteral("image/x-puzzle-piece"); }
-
-protected:
-    void dragEnterEvent(QDragEnterEvent *event) override;
-    void dragMoveEvent(QDragMoveEvent *event) override;
-    void dropEvent(QDropEvent *event) override;
-    void startDrag(Qt::DropActions supportedActions) override;
-
-    int m_PieceSize;
-};
-
-#endif // PIECESLIST_H
diff --git a/examples/widgets/draganddrop/puzzle/puzzle.pro b/examples/widgets/draganddrop/puzzle/puzzle.pro
deleted file mode 100644
index c462ba1bb8..0000000000
--- a/examples/widgets/draganddrop/puzzle/puzzle.pro
+++ /dev/null
@@ -1,17 +0,0 @@
-QT += widgets
-requires(qtConfig(filedialog))
-
-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]/widgets/draganddrop/puzzle
-INSTALLS += target
diff --git a/examples/widgets/draganddrop/puzzle/puzzle.qrc b/examples/widgets/draganddrop/puzzle/puzzle.qrc
deleted file mode 100644
index 4076cec026..0000000000
--- a/examples/widgets/draganddrop/puzzle/puzzle.qrc
+++ /dev/null
@@ -1,5 +0,0 @@
-<!DOCTYPE RCC><RCC version="1.0">
-<qresource prefix="/images">
-   <file>example.jpg</file>
-</qresource>
-</RCC>
diff --git a/examples/widgets/draganddrop/puzzle/puzzlewidget.cpp b/examples/widgets/draganddrop/puzzle/puzzlewidget.cpp
deleted file mode 100644
index 7c3f12f7d8..0000000000
--- a/examples/widgets/draganddrop/puzzle/puzzlewidget.cpp
+++ /dev/null
@@ -1,167 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
-
-#include "puzzlewidget.h"
-#include "pieceslist.h"
-
-#include <QDrag>
-#include <QDragEnterEvent>
-#include <QMimeData>
-#include <QPainter>
-
-PuzzleWidget::PuzzleWidget(int imageSize, QWidget *parent)
-    : QWidget(parent), m_ImageSize(imageSize)
-{
-    setAcceptDrops(true);
-    setMinimumSize(m_ImageSize, m_ImageSize);
-    setMaximumSize(m_ImageSize, m_ImageSize);
-}
-
-void PuzzleWidget::clear()
-{
-    pieces.clear();
-    highlightedRect = QRect();
-    inPlace = 0;
-    update();
-}
-
-void PuzzleWidget::dragEnterEvent(QDragEnterEvent *event)
-{
-    if (event->mimeData()->hasFormat(PiecesList::puzzleMimeType()))
-        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.united(targetSquare(event->position().toPoint()));
-
-    if (event->mimeData()->hasFormat(PiecesList::puzzleMimeType())
-        && findPiece(targetSquare(event->position().toPoint())) == -1) {
-
-        highlightedRect = targetSquare(event->position().toPoint());
-        event->setDropAction(Qt::MoveAction);
-        event->accept();
-    } else {
-        highlightedRect = QRect();
-        event->ignore();
-    }
-
-    update(updateRect);
-}
-
-void PuzzleWidget::dropEvent(QDropEvent *event)
-{
-    if (event->mimeData()->hasFormat(PiecesList::puzzleMimeType())
-        && findPiece(targetSquare(event->position().toPoint())) == -1) {
-
-        QByteArray pieceData = event->mimeData()->data(PiecesList::puzzleMimeType());
-        QDataStream dataStream(&pieceData, QIODevice::ReadOnly);
-        Piece piece;
-        piece.rect = targetSquare(event->position().toPoint());
-        dataStream >> piece.pixmap >> piece.location;
-
-        pieces.append(piece);
-
-        highlightedRect = QRect();
-        update(piece.rect);
-
-        event->setDropAction(Qt::MoveAction);
-        event->accept();
-
-        if (piece.location == piece.rect.topLeft() / pieceSize()) {
-            inPlace++;
-            if (inPlace == 25)
-                emit puzzleCompleted();
-        }
-    } else {
-        highlightedRect = QRect();
-        event->ignore();
-    }
-}
-
-int PuzzleWidget::findPiece(const QRect &pieceRect) const
-{
-    for (int i = 0, size = pieces.size(); i < size; ++i) {
-        if (pieces.at(i).rect == pieceRect)
-            return i;
-    }
-    return -1;
-}
-
-void PuzzleWidget::mousePressEvent(QMouseEvent *event)
-{
-    QRect square = targetSquare(event->position().toPoint());
-    const int found = findPiece(square);
-
-    if (found == -1)
-        return;
-
-    Piece piece = pieces.takeAt(found);
-
-    if (piece.location == square.topLeft() / pieceSize())
-        inPlace--;
-
-    update(square);
-
-    QByteArray itemData;
-    QDataStream dataStream(&itemData, QIODevice::WriteOnly);
-
-    dataStream << piece.pixmap << piece.location;
-
-    QMimeData *mimeData = new QMimeData;
-    mimeData->setData(PiecesList::puzzleMimeType(), itemData);
-
-    QDrag *drag = new QDrag(this);
-    drag->setMimeData(mimeData);
-    drag->setHotSpot(event->position().toPoint() - square.topLeft());
-    drag->setPixmap(piece.pixmap);
-
-    if (drag->exec(Qt::MoveAction) != Qt::MoveAction) {
-        pieces.insert(found, piece);
-        update(targetSquare(event->position().toPoint()));
-
-        if (piece.location == square.topLeft() / pieceSize())
-            inPlace++;
-    }
-}
-
-void PuzzleWidget::paintEvent(QPaintEvent *event)
-{
-    QPainter painter(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 (const Piece &piece : pieces)
-        painter.drawPixmap(piece.rect, piece.pixmap);
-}
-
-const QRect PuzzleWidget::targetSquare(const QPoint &position) const
-{
-    QPoint topLeft = QPoint(position.x() / pieceSize(), position.y() / pieceSize()) * pieceSize();
-    return QRect(topLeft, QSize(pieceSize(), pieceSize()));
-}
-
-int PuzzleWidget::pieceSize() const
-{
-    return m_ImageSize / 5;
-}
-
-int PuzzleWidget::imageSize() const
-{
-    return m_ImageSize;
-}
diff --git a/examples/widgets/draganddrop/puzzle/puzzlewidget.h b/examples/widgets/draganddrop/puzzle/puzzlewidget.h
deleted file mode 100644
index d1c00872ec..0000000000
--- a/examples/widgets/draganddrop/puzzle/puzzlewidget.h
+++ /dev/null
@@ -1,56 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
-
-#ifndef PUZZLEWIDGET_H
-#define PUZZLEWIDGET_H
-
-#include <QPoint>
-#include <QPixmap>
-#include <QList>
-#include <QWidget>
-
-QT_BEGIN_NAMESPACE
-class QDragEnterEvent;
-class QDropEvent;
-class QMouseEvent;
-QT_END_NAMESPACE
-
-class PuzzleWidget : public QWidget
-{
-    Q_OBJECT
-
-public:
-    explicit PuzzleWidget(int imageSize, QWidget *parent = nullptr);
-    void clear();
-
-    int pieceSize() const;
-    int imageSize() const;
-
-signals:
-    void puzzleCompleted();
-
-protected:
-    void dragEnterEvent(QDragEnterEvent *event) override;
-    void dragLeaveEvent(QDragLeaveEvent *event) override;
-    void dragMoveEvent(QDragMoveEvent *event) override;
-    void dropEvent(QDropEvent *event) override;
-    void mousePressEvent(QMouseEvent *event) override;
-    void paintEvent(QPaintEvent *event) override;
-
-private:
-    struct Piece {
-        QPixmap pixmap;
-        QRect rect;
-        QPoint location;
-    };
-
-    int findPiece(const QRect &pieceRect) const;
-    const QRect targetSquare(const QPoint &position) const;
-
-    QList<Piece> pieces;
-    QRect highlightedRect;
-    int inPlace;
-    int m_ImageSize;
-};
-
-#endif // PUZZLEWIDGET_H