我要是在“采样间隔”下加上如 图2的分隔线，该怎么办呢要写呀，（不要用designer，没办法呀？） [复制链接]

图1，图2 请点此链接：谢谢啦

http://www.qtcn.org/bbs/read.php?tid=25077&fpage=0&toread=&page=1

signTranPButn  = new QPushButton(QObject::tr("整型数据的有符号和无符号转换:"));
        extremumPButn  = new QPushButton(QObject::tr("采样间隔:"));
        abnormityPbutn = new QPushButton(QObject::tr("设置采样间隔:"));
        
        QVBoxLayout *saminterlyr = new QVBoxLayout(SamplingIntervalSetWgt);
        QFrame *line = new QFrame(SamplingIntervalSetWgt);
        line->setObjectName(QString::fromUtf8("line"));
        line->setFrameShape(QFrame::HLine);
        line->setFrameShadow(QFrame::Sunken);

        saminterlyr->addWidget(line);
        
        saminterlyr->addWidget(signTranPButn);
        
        saminterlyr->addWidget(extremumPButn);
        
        saminterlyr->addWidget(abnormityPbutn);
        QSpacerItem verticalSpacer = new QSpacerItem(20, 284, QSizePolicy::Minimum, QSizePolicy::Expanding);
        saminterlyr->addItem(verticalSpacer);

xingqingfly感谢你，你懂的太多了，你用Qt多长时间了呀