void DisplayPathFilename::mainlayout()
{
m_hboxlayout->addWidget(m_filenamelabel);
m_filenamelabel->setText("配置文件：");
m_hboxlayout->addWidget(m_filenamelineedit);
m_hboxlayout->addWidget(m_displaypathlabel);
m_displaypathlabel->setText("配置文件路径：");
m_hboxlayout->addWidget(m_displaypathlineedit);
m_hboxlayout->setContentsMargins(0,0,0,3);
m_hboxlayout->setStretch(0,0); //设置比例，根据前面添加到布局中的控件的顺序，通过索引设置比例
m_hboxlayout->setStretch(1,1);
m_hboxlayout->setStretch(2,0);
m_hboxlayout->setStretch(3,2);
}
效果：
标签：控件,layout,qt,配置文件,hboxlayout,设置,addWidget,setStretch From： https://www.cnblogs.com/RedWetPlace/p/17355921.html