问QWidget中的QLayout

EN

                                Grid::Grid(QWidget *parent) :
        QWidget(parent),
        m_grid(new Cell**[Y_MAX])
{
    QGridLayout             *layout = new QGridLayout(this);
    int                     x;
    int                     y;

    for (y = 0; y < Y_MAX; y++)
    {
        m_grid[y] = new Cell*[X_MAX];
        for (x = 0; x < X_MAX; x++)
        {
            m_grid[y][x] = new Cell(x, y, this);
            layout->addWidget(m_grid[y][x], y, x);
        }
    }
    this->setLayout(layout);
}

                                Cell::Cell(const int x, const int y, QWidget *parent) :
        QWidget(parent),
        m_x(x),
        m_y(y),
        m_btn(new QPushButton("", this))
{
    m_btn->setFixedSize(WIDTH, HEIGHT);
    m_btn->setFlat(true);
    m_btn->setEnabled(false);
    m_btn->setStyleSheet("border:1px solid #000000;border-radius: 13px;background-color: white;");
    QObject::connect(m_btn, SIGNAL(clicked()), this, SLOT(selected()));
}