#include <qapplication.h>#include <qdir.h>#include <qfile.h>#include <qpainter.h>#include <qtextstream.h>#include "tictactoe.h"TicTacToe::TicTacToe(QWidget *parent, const char *name)    : QWidget(parent, name){    setCaption(tr("Tic-Tac-Toe"));    clearBoard();    if (qApp->isSessionRestored())        restoreState();}QSize TicTacToe::sizeHint() const{    return QSize(200, 200);}void TicTacToe::clearBoard(){    for (int row = 0; row < 3; ++row) {        for (int col = 0; col < 3; ++col) {            board[row][col] = Empty;        }    }    turnNumber = 0;}void TicTacToe::restoreState(){    QFile file(sessionFileName());    if (file.open(IO_ReadOnly)) {        QTextStream in(&file);        for (int row = 0; row < 3; ++row) {            for (int col = 0; col < 3; ++col) {                in >> board[row][col];                if (board[row][col] != Empty)                    ++turnNumber;            }        }    }    repaint();}QString TicTacToe::sessionFileName() const{    return QDir::homeDirPath() + "/.tictactoe_"           + qApp->sessionId() + "_" + qApp->sessionKey();}QString TicTacToe::saveState() const{    QFile file(sessionFileName());    if (file.open(IO_WriteOnly)) {        QTextStream out(&file);        for (int row = 0; row < 3; ++row) {            for (int col = 0; col < 3; ++col) {                out << board[row][col];            }        }    }    return file.name();}bool TicTacToe::gameInProgress() const{    return turnNumber > 0 && turnNumber < 9;}void TicTacToe::paintEvent(QPaintEvent *){    QPainter painter(this);    painter.setPen(QPen(red, 1));    painter.drawLine(cellWidth(), 0, cellWidth(), height());    painter.drawLine(2 * cellWidth(), 0, 2 * cellWidth(), height());    painter.drawLine(0, cellHeight(), width(), cellHeight());    painter.drawLine(0, 2 * cellHeight(), width(), 2 * cellHeight());    painter.setPen(QPen(blue, 2));    for (int row = 0; row < 3; ++row) {        for (int col = 0; col < 3; ++col) {            QRect r = cellRect(row, col);            if (board[row][col] == Cross) {                painter.drawLine(r.topLeft(), r.bottomRight());                painter.drawLine(r.topRight(), r.bottomLeft());            } else if (board[row][col] == Nought) {                painter.drawEllipse(r);            }        }    }    painter.setPen(QPen(yellow, 3));    for (int row = 0; row < 3; ++row) {        if (board[row][0] != Empty                && board[row][1] == board[row][0]                && board[row][2] == board[row][0]) {            int y = cellRect(row, 0).center().y();            painter.drawLine(0, y, width(), y);            turnNumber = 9;        }    }    for (int col = 0; col < 3; ++col) {        if (board[0][col] != Empty                && board[1][col] == board[0][col]                && board[2][col] == board[0][col]) {            int x = cellRect(0, col).center().x();            painter.drawLine(x, 0, x, height());            turnNumber = 9;        }    }    if (board[0][0] != Empty && board[1][1] == board[0][0]            && board[2][2] == board[0][0]) {        painter.drawLine(0, 0, width(), height());        turnNumber = 9;    }    if (board[0][2] != Empty && board[1][1] == board[0][2]            && board[2][0] == board[0][2]) {        painter.drawLine(0, height(), width(), 0);        turnNumber = 9;    }}void TicTacToe::mousePressEvent(QMouseEvent *event){    if (turnNumber == 9) {        clearBoard();        repaint();    } else {        for (int row = 0; row < 3; ++row) {            for (int col = 0; col < 3; ++col) {                QRect r = cellRect(row, col);                if (r.contains(event->pos())) {                    if (board[row][col] == Empty) {                        if (turnNumber % 2 == 0)                            board[row][col] = Cross;                        else                            board[row][col] = Nought;                        ++turnNumber;                        repaint();                    }                    break;                }            }        }    }}QRect TicTacToe::cellRect(int row, int col) const{    const int HMargin = width() / 30;    const int VMargin = height() / 30;    return QRect(col * cellWidth() + HMargin,                 row * cellHeight() + VMargin,                 cellWidth() - 2 * HMargin,                 cellHeight() - 2 * VMargin);}