Thanks Alex, Much appreciated! Stephen On Thu, 14 Dec 2017 at 04:50, Alex Harsanyi <alexharsa...@gmail.com> wrote:
> 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. > -- Kind regards, Stephen -- Ealing (London), UK -- 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.
