GtkTreeView current row text underline

Question

How can I underline only text (not entire row) in GtkTreeView?

GtkTreeView row:selected
{
    border-bottom: 5px solid #ffffff;
}

gives me this:

when I want this:

Answer 1

You could set the hexpand property of the label to false, and the halign property to something other than "fill"; (note these are properties in your code, not in CSS) or you could use <u>Wi-Fi</u> as the text of your label and turn on the use-markup property.