Thanks Alex, Much appreciated! Stephen On Thu, 14 Dec 2017 at 04:50, Alex Harsanyi <[email protected]> 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 [email protected]. > 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
