puzzlewidget.h Example File
itemviews/puzzle/puzzlewidget.h
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    ** Copyright (C) 2005-2006 Trolltech AS. All rights reserved.
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    ** This file is part of the documentation of the Qt Toolkit.
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    ** and appearing in the file LICENSE.GPL included in the packaging of
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    #ifndef PUZZLEWIDGET_H
    #define PUZZLEWIDGET_H
    #include <QList>
    #include <QPoint>
    #include <QPixmap>
    #include <QWidget>
    class QDragEnterEvent;
    class QDropEvent;
    class QMouseEvent;
    class PuzzleWidget : public QWidget
    {
        Q_OBJECT
    public:
        PuzzleWidget(QWidget *parent = 0);
        void clear();
    signals:
        void puzzleCompleted();
    protected:
        void dragEnterEvent(QDragEnterEvent *event);
        void dragLeaveEvent(QDragLeaveEvent *event);
        void dragMoveEvent(QDragMoveEvent *event);
        void dropEvent(QDropEvent *event);
        void mousePressEvent(QMouseEvent *event);
        void paintEvent(QPaintEvent *event);
    private:
        int findPiece(const QRect &pieceRect) const;
        const QRect targetSquare(const QPoint &position) const;
        QList<QPixmap> piecePixmaps;
        QList<QRect> pieceRects;
        QList<QPoint> pieceLocations;
        QRect highlightedRect;
        int inPlace;
    };
    #endif