1 files changed, 167 insertions, 0 deletions
diff --git a/tests/manual/examples/widgets/draganddrop/puzzle/puzzlewidget.cpp b/tests/manual/examples/widgets/draganddrop/puzzle/puzzlewidget.cpp
new file mode 100644
index 0000000000..7c3f12f7d8
--- /dev/null
+++ b/tests/manual/examples/widgets/draganddrop/puzzle/puzzlewidget.cpp
@@ -0,0 +1,167 @@
+// 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;
+}