The "row-activated" signal is emitted when the method TreeView.rowActivated is called, when the user double clicks a treeview row with the "activate-on-single-click" property set to FALSE, or when the user single clicks a row when the "activate-on-single-click" property set to TRUE. It is also emitted when a non-editable row is selected and one of the keys: Space, Shift+Space, Return or Enter is pressed.

For selection handling refer to the [tree widget conceptual overview]TreeWidget as well as gtk.TreeSelection

class TreeView
ConnectFlags connectFlags = cast(ConnectFlags)0