Brian, this is just for you to remember, hehe. If you read this, you might remember your own idea about this feature - if you don't, here it is: Either use one GtkTooltip for the whole xfdesktop and move it to the correct position once an icon is hovered, or create your own tooltip widget. When working on this, you could (but I know you don't want to) also consider dropping this really weird truncated/not-truncted label behaviour of the icons completely by replacing it with the tooltip. Reproducible: Always Steps to Reproduce:
Ok, I implemented a tooltip. I still like the ellipsised thing depending on selected/not selected, so that stays.