BringPathIntoView vertically scrolls my treeview so the end path item is "in view", however the item is hidden to the right because the treeview is in a narrow container. How can I get the treeview to auto scroll horizontally over so the item is truly in view?
I guess you mean that you cannot see the whole RadTreeViewItem. In order to workaround this, you can scroll the ScrollViewer of the tree horizontally like so: