Qtreewidget dotted line setting

See relevant blogs say QTreeWidget, There are many posts with dotted lines removed , But I'm using QTreeWidget When displaying 3D model component tree , It was found that this was not the case at all . Because I don't know QTreeView Whether the display with dotted line is supported , So I chose QTreeWidget, In fact, just set it QTreeView Property is fine .

    m_treeWidget->setHeaderHidden(true);  // Hide header 
    m_treeWidget->setStyle(QStyleFactory::create("windows"));// Connection settings 
    m_treeWidget->setSelectionMode(QAbstractItemView::ExtendedSelection);// You can choose more than one