Highlight whole TreeViewItem line in WPF

Question

If I set TreeViewItem Background it highlights the header only. How can I highlight the whole line?

I have found a post almost solving a problem http://social.msdn.

Answer 1

This is by far the easiest solution. Just create a rectangle, call it Hb, and set its margine to -100px and not visible. Only set it to Visible when you've it selected or mouse over. It's a hack, but you're good for up to 5 levels of nested TreeViewItems (100 > 19*5)