Re: Fix some tooltip related problems

[martin rudalics <rudalics@gmx.at>]

 > (If this has no effect on users or Lisp then you can
 > ignore this message.)
 >
 > Could you perhaps describe the changes in terms of what
 > changes for (1) users and (2) existing Lisp code?  And
 > could you describe the problem(s) it is meant to solve?
 >
 >> Replace 'tooltip' frame parameter with a 'tooltip'
 >> member in the frame structure.
 >
 > I don't find a `tooltip' parameter mentioned in the
 > docs (e.g. Emacs 26 pretests).  Is this related to
 > variable `tooltip-frame-parameters'?

No.  In Emacs 26 a tooltip's frame has a parameter called 'tooltip'
set to t.  But tooltip frames are hardly visible - `frame-list' and
`other-frames' don't show them - so it's unlikely that you've seen
that parameter.

 > If so, this might break code (of which I have some)
 > that uses that variable to configure tooltip frames.

`tooltip-frame-parameters' continues to work as before.

 > Does this affect use of `x-show-tip' or `tooltip-show'?

No.

 >> For modeline help-echoing have tooltips show applicable
 >> actions only.
 >
 > What does that mean?  What "inapplicable" stuff will
 > users no longer be able to see in tooltips?

For example, with emacs -Q and the mouse over the right part of the
single modeline you won't see a tooltip because the corresponding
window is already selected, occupies the whole frame and can be
neither removed nor resized.

martin