以矩形為例：

    QPainter painter(this);// painter.setPen(Qt::blue);// painter.setFont(QFont("Arial",30));// painter.drawText(rect(),Qt::AlignCenter,"Hello Qt!!!");QRect rect = QRect(50, 50, 400, 400);QRect box = QRect(100, 100, 105, 63);QColor maskColor(255, 0, 0, 255);QColor fontColor(0, 139, 139, 255  );QPainterPath path;path.addRect(rect);//添加路徑path.addRect(box); //添加路徑QPainterPath subRect;subRect.addRect(box);path.subtracted(subRect);//減去路徑及其所包含的區域painter.fillRect(box,fontColor);painter.fillPath(path, maskColor);