How to create a layout with rows that expands/collapses AND indents the content?
Is it possible to create a layout with rows that works like OS X Finder's "List View"? Each row can be expanded or collapsed (depending if it has childs) and indents (depending on which "level" it is). Please see the attached illustration taken from an OS X Finder's window, and another from OmniOutliner Pro.
I'd like to know if it possible, and how difficult it is to implement it. (I think the indentation is the difficult part, or could be impossible because FileMaker Pro's layout is static, not dynamic. Please advise.)