Re: Question about minibuffer and child frames (Posframe)

[Gerd Möllmann]

Gerd Möllmann <gerd.moellmann@gmail.com> writes:

> martin rudalics <rudalics@gmx.at> writes:
>
>>>> The modeline of the "Completions* window seems to have the same
>>>> background as the modeline of the normal frame's *scratch* window.
>>>> Doesn't that hint at redisplay believing that both windows are the
>>>> selected one?
>>>
>>> Probably. They are the (frame-selected-window) of their respective
>>> frames. I guess that has previously not been possible to see on a tty.
>>> Cab't check at the moment--I've made me a todo to check if xdisp.c does
>>> this differently on ttys.
>>
>> At any time there's only one selected window.  When it changes,
>> redisplay is told to update all possibly involved frames and update the
>> background of the mode line of the selected and previously selected
>> windows appropriately.
>
> I've made me a todo entry for that. One thing after the other :-).
>
> (And for Alacritty users reading this: 0.13.2 (1) KKP support is
> currently broken for me on macOS 15.)
>
>>> Got an idea while eating: Does Emacs get a window system focus event
>>> when we unhide a frame? Or something like it? And do we select the frame
>>> then maybe?
>>
>> When that frame gets focus by the WM; it depends on the WM's settings.
>> A frame can get focused by making it, moving the mouse over it,
>> clicking with the mouse into it, Alt-tabbing to it, or by having an
>> application ask to give it focus.  I suppose that Emacs has the
>> invariant that the focused frame is also the selected one even if it is
>> hidden.  In either case, for a tty we have to do the "focusing"
>> ourselves.
>
> Yeah, if that's not the current problem, there lie dragons. Shit. Did I
> mention that I just wanted Corfu and Posframe?

Just FYI. when I manually select-frame-set-input-focus to the posframe,
the display looks okay. The cursor is shown in the posframe and the
parent's mini-window is empty, like in the GUI case.

Downside is that Emacs doesn't accept input anymore, and has to be
killed :-).