You cannot do that: The control already uses text% snips internally for each
item, but it redefines their `on-default-char` method to discard all
keyboard
input, which means they are not editable in-line.
If you want to have a look, the implementation for the hierarchical-list%,
is
in your Racket installation under the "share/pkgs/gui-lib/mrlib/hierlist/"
folder.
Your option is to copy out the hierarchical-list% implementation and modify
it
yourself. Simply removing the `on-default-char` override might create
further
problems with how the snip% objects interact with each other and the
pasteboard% object which manages them.
I believe modifying the hierarchical-list% will work, but it involves a lot
of
work and might not be a good task for someone who just starts out with
Racket
GUI programming.
Alex.
On Monday, December 31, 2018 at 12:19:16 AM UTC+8, Andre Garzia wrote:
>
> Following the topic of Racket gui apps I decided to ask a question here
> before I plunge into a rabbit hole from which I may take hours to climb
> back. I am trying to implement a type of GUI app which is usually called an
> outliner. Basically it should be a Hierarchical List like the one provided
> by:
>
> http://docs.racket-lang.org/mrlib/Hierarchical_List_Control.html
>
> but with each item being editable. I thought, maybe wrongly, that I could
> somehow build on top of that control and instead of using a "text%" use
> some kind of editor or input field for each item by altering the mixin that
> is used when you add a new item, but so far I don't see how to do it. I am
> new to Racket Gui stuff and this task is not obvious to me. Can someone
> here share a clue or two?
>
> Thanks a lot in advance.
>
> Em domingo, 30 de dezembro de 2018 11:34:23 UTC, spdegabrielle escreveu:
>>
>> There oate other examples but I just saw this:
>>
>>
>> https://twitter.com/id_aa_carmack/status/1079200506139103233?s=21
>>
>> If you like to know more about creating GUI apps in Racket? Just start
>> here: http://docs.racket-lang.org/gui/index.html
>>
>> S.
>>
>>
>> --
>>
>>
>
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