#ifndef TICTACTOE_H#define TICTACTOE_H#include <qwidget.h>class TicTacToe : public QWidget{    Q_OBJECTpublic:    TicTacToe(QWidget *parent = 0, const char *name = 0);    QSize sizeHint() const;    bool gameInProgress() const;    QString saveState() const;protected:    void paintEvent(QPaintEvent *event);    void mousePressEvent(QMouseEvent *event);private:    enum { Empty = '-', Cross = 'X', Nought = 'O' };    void clearBoard();    void restoreState();    QString sessionFileName() const;    QRect cellRect(int row, int col) const;    int cellWidth() const { return width() / 3; }    int cellHeight() const { return height() / 3; }    char board[3][3];    int turnNumber;};#endif