treeWidget->setStyleSheet("QTreeWidgetItem{background-color:rgb(255,0,0,150);}"
"QTreeView::item:hover{background-color:rgb(0,255,0,50)}"
"QTreeView::item:selected{background-color:rgb(255,0,0,100)}"
"QHeaderView{background-color:rgb(255,0,0,1);}"
"QHeaderView::section{background-color:rgb(0,255,0,1);}");