Thanks for creating the issue Textbox set! fails · Issue #3069 · MakieOrg/Makie.jl · GitHub.
Note to further improve readability:
it is possible to tell github that a block of code is julia and get syntax highlighting) by typing
```julia
instead of bare triple quotes.
Reading the previous issue I have a feeling there is a workaround
Indeed, there is a workaround (Makie gives us a lot of control, so it is almost always the case 
): define a custom method, e.g.
function custom_set!(tbox::Makie.Textbox, new_text)
old_text = tbox.displayed_string[]
old_pos = tbox.cursorindex[]
if length(new_text) == 0
# for now setting new_text to "" errors
# TODO: is resetting the correct thing to do ?
Makie.reset!(tbox)
elseif length(new_text) == length(old_text)
# no length change, cursor is already at the correct position
Makie.set!(tbox, new_text)
elseif length(new_text) > length(old_text)
if old_pos == length(old_text)
# Let's keep the cursor at the end.
# Need to add the new text first,
# to make the new cursor position valid.
Makie.set!(tbox, new_text)
tbox.cursorindex[] = length(new_text)
else
# cursor was inside the text; keep cursor position
Makie.set!(tbox, new_text)
end
else
# new text is shorter
# place the cursor at a future valid position first (not outside new_text)
tbox.cursorindex[] = min(old_pos, length(new_text))
Makie.set!(tbox, new_text)
end
end
and use that instead of Makie.set!, like custom_set!(atextbox, "a string2").