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50
51#ifndef PUZZLEWIDGET_H
52#define PUZZLEWIDGET_H
53
54#include <QPoint>
55#include <QPixmap>
56#include <QVector>
57#include <QWidget>
58
59QT_BEGIN_NAMESPACE
60class QDragEnterEvent;
61class QDropEvent;
62class QMouseEvent;
63QT_END_NAMESPACE
64
65class PuzzleWidget : public QWidget
66{
67 Q_OBJECT
68
69public:
70 explicit PuzzleWidget(int imageSize, QWidget *parent = nullptr);
71 void clear();
72
73 int pieceSize() const;
74 int imageSize() const;
75
76signals:
77 void puzzleCompleted();
78
79protected:
80 void dragEnterEvent(QDragEnterEvent *event) override;
81 void dragLeaveEvent(QDragLeaveEvent *event) override;
82 void dragMoveEvent(QDragMoveEvent *event) override;
83 void dropEvent(QDropEvent *event) override;
84 void mousePressEvent(QMouseEvent *event) override;
85 void paintEvent(QPaintEvent *event) override;
86
87private:
88 struct Piece {
89 QPixmap pixmap;
90 QRect rect;
91 QPoint location;
92 };
93
94 int findPiece(const QRect &pieceRect) const;
95 const QRect targetSquare(const QPoint &position) const;
96
97 QVector<Piece> pieces;
98 QRect highlightedRect;
99 int inPlace;
100 int m_ImageSize;
101};
102
103#endif // PUZZLEWIDGET_H
104

source code of qtbase/examples/widgets/itemviews/puzzle/puzzlewidget.h