diff options
Diffstat (limited to 'tests/manual/examples/widgets/itemviews/puzzle/puzzlewidget.cpp')
-rw-r--r-- | tests/manual/examples/widgets/itemviews/puzzle/puzzlewidget.cpp | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/tests/manual/examples/widgets/itemviews/puzzle/puzzlewidget.cpp b/tests/manual/examples/widgets/itemviews/puzzle/puzzlewidget.cpp new file mode 100644 index 0000000000..15aa6ac94f --- /dev/null +++ b/tests/manual/examples/widgets/itemviews/puzzle/puzzlewidget.cpp @@ -0,0 +1,163 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#include "puzzlewidget.h" + +#include <QtWidgets> + +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("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.united(targetSquare(event->position().toPoint())); + + if (event->mimeData()->hasFormat("image/x-puzzle-piece") + && 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("image/x-puzzle-piece") + && findPiece(targetSquare(event->position().toPoint())) == -1) { + + QByteArray pieceData = event->mimeData()->data("image/x-puzzle-piece"); + 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()); + 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("image/x-puzzle-piece", 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::IgnoreAction) { + pieces.insert(found, piece); + update(targetSquare(event->position().toPoint())); + + if (piece.location == QPoint(square.x() / pieceSize(), square.y() / 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; +} |