I built a similar control, although it does not represent directory paths, just labels which are stacked vertically. I ended up defining a structure to hold the text and width + height of each label and keep these structures in a list. In my case, all labels have the same size so converting a mouse coordinate to a list index is just arithmetic, but it could be extended to support variable width labels and just search the list in linear time to convert a mouse coordinate to a list index. The number of items in the control should be small enough that linear search should not be a disadvantage.
You can find the definition of the control here: https://github.com/alex-hhh/ActivityLog2/blob/master/rkt/widgets.rkt#L1910 To convert it to variable width labels, the `hover-candiate` function would have to be changed (third `cond` option) to do a linear search on the label widths. `label-box-dimensions` would also have to change to report the actual label width and height for all labels (currently all labels have the dimensions of the largest one). Best Regards, Alex. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
