RibbonGroup添加QLineEdit：

QLineEdit* controlEdit = new QLineEdit();
             controlEdit->setToolTip(tr("Edit"));
             controlEdit->setText(tr("Edit"));
             controlEdit->setMinimumWidth(150);
             controlEdit->setMaximumWidth(150);
             QAction* act = groupStandard->addWidget(controlEdit);
             act->setText(tr("Edit"));

效果如下：

RibbonGroup 添加QLineEdit_Standard