Re: Question about üarent-frame changes

["Gerd Möllmann" <gerd.moellmann@gmail.com>]

martin rudalics <rudalics@gmx.at> writes:

>> 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.
>
> I'm not aware of people using multiple frames on TTYs and I have no idea
> whether child frames out there are even intended to be reparented.

Ok, thanks. I'm using mulitple frames sometimes, but in the end seem to
99% end up using tabs (C-x t 2 etc), like on GUI.

> Reparenting is useful because you can set up one child frame for some
> special purpose, make it invisible when you don't need it, and move it
> to another frame and make it visible there whenever you want to.  On
> GUIs, this approach has the advantage that you can avoid the (at least
> here) costly process of setting up frame faces every time anew.  

Hm, that might indeed be an interesting optimization.

> Emacs tooltips do that by default and I recall that showing a tooltip
> every time incurred two entire GC cycles here.

(Oh, hadn't thought of tooltips on ttys yet. New entry in my list :-).)

So I guess I'll keep at least the option of re-parenting child frames to
another root frame open, until I know more about how fast that all
turns out to be. If I had to guess, face realization on ttys could well
be faster than on GUIs because all the font stuff doesn't have to be
done.

But I'll disable to root <-> child transformation. That feels abit
esoteric.

Thanks!