Merry Xmas friends, hope everyone here is having a great time. Decided to ask a question here before I plunge into a rabbit hole from which I may take hours to climb back. I am trying to implement a type of GUI app which is usually called an outliner. Basically it should be a Hierarchical List like the one provided by http://docs.racket-lang.org/mrlib/Hierarchical_List_Control.html but with each item being editable. I thought, maybe wrongly, that I could somehow build upon that control and instead of using a text%use some kind of editor or input field for each item but so far I don’t see how to do it. I am new to Racket Gui stuff and this task is not obvious to me. Can someone here share a clue or two? Thanks a lot in advance.