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# puzzlewidget.h Example File
draganddrop/puzzle/puzzlewidget.h

        /****************************************************************************
        **
        ** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
        **
        ** This file is part of the example classes of the Qt Toolkit.
        **
        ** Licensees holding valid Qt Preview licenses may use this file in
        ** accordance with the Qt Preview License Agreement provided with the
        ** Software.
        **
        ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
        ** information about Qt Commercial License Agreements.
        **
        ** Contact info@trolltech.com if any conditions of this licensing are
        ** not clear to you.
        **
        ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
        ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        **
        ****************************************************************************/

        #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