customize the root node of a treeview

[billconan]

hello guys,

i want to customize my treeview with style sheet. but i discovered that the root node items cannot be customized. the background is always gray.

i'm setting the background of my treeview like this:

QTreeView {
alternate-background-color: yellow;
background-color:black;
}

QTreeView::item {
background-color:red;
}

but this only affects on the normal tree nodes.

i'm attaching a picture, those i circled in red are the node items that i want to customize.

is there anybody having done this before?

thanks.