Qt绘制中国象棋棋盘

void Board::paintEvent(QPaintEvent*)
{
	QPainter painter(this);
	int d=40;
	//画10条横线
	for(int =1;i<=10;i++)//从1开始，就不会使得棋盘处在边界
	{
		painter.drawLine(QPoint(d,i*d),QPoint(9*d,i*d));
	}
	//画9条竖线
	for(int i=1;i<=9;i++)
	{
		if(i==1||i==9)
		{
			painter.drawLine(QPoint(i*d,d),QPoint(i*d,10*d));
		}
		else
		{
			painter.drawLine(QPoint(i*d,d),QPoint(i*d,5*d));
			painter.drawLine(QPoint(i*d,6d),QPoint(i*d,10*d));
		}
	}
	//九宫格
	painter.drawLine(QPoint(4*d,1*d),QPoint(6*d,3*d));
	painter.drawLine(QPoint(6*d,1*d),QPoint(4*d,3*d));
	painter.drawLine(QPoint(4*d,8*d),QPoint(6*d,10*d));
	painter.drawLine(QPoint(6*d,8*d),QPoint(4*d,10*d));
}