Daniel Mendler's corfu at-point completion package works on tty with child
frames, as an example to take a look at.

On Wed, Sep 18, 2024 at 10:27 AM Robert Pluim <rpluim@gmail.com> wrote:

> >>>>> On Wed, 18 Sep 2024 16:15:56 +0200, martin rudalics <rudalics@gmx.at>
> said:
>
>     >> AFAICT from the Elisp Info docs, one is currently free to change the
>     >> parent-frame as one sees fit. That is, one can make a child a root
>     >> frame, a root frame a child, or change the parent of a child to
> another
>     >> root.
>     >>
>     >> I'm currently inclined to disallow parent-frame changes on ttys
>     >> entirely, unless it is used for something. Couldn't find something
>     >> today, but maybe something is a package outside Emacs' repo, or I'm
> just
>     >> ont looking for the right thing.
>
>     martin> I'm not aware of people using multiple frames on TTYs and I
> have no idea
>     martin> whether child frames out there are even intended to be
> reparented.
>
> I do it all the time. But obviously they each occupy the full
> terminal.
>
>     martin> Reparenting is useful because you can set up one child frame
> for some
>     martin> special purpose, make it invisible when you don't need it, and
> move it
>     martin> to another frame and make it visible there whenever you want
> to.  On
>     martin> GUIs, this approach has the advantage that you can avoid the
> (at least
>     martin> here) costly process of setting up frame faces every time
> anew.  Emacs
>     martin> tooltips do that by default and I recall that showing a
> tooltip every
>     martin> time incurred two entire GC cycles here.
>
> Would setting up frame faces be that expensive on tty? Iʼd really love
> to have tty child frames, even if they were not blazingly fast.
>
> In any case, I took a quick look at "posframe", it doesnʼt do any
> reparenting that I can see.
>
> Robert
> --
>
>