Item Views Puzzle Example

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#ifndef PUZZLEWIDGET_H #define PUZZLEWIDGET_H #include <QPoint> #include <QPixmap> #include <QVector> #include <QWidget> class QDragEnterEvent; class QDropEvent; class QMouseEvent; 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; QVector<Piece> pieces; QRect highlightedRect; int inPlace; int m_ImageSize; }; #endif // PUZZLEWIDGET_H