Re: Could x-show-tip be reimplemented in Elisp? How does one create borderless frames from Elisp?

[Clément Pit--Claudel]

On 02/17/2016 04:12 AM, martin rudalics wrote:
>>> These are overridden by the window manager.  ‘border-width’ is the most
>>> obscure of our frame parameters, it's implementation is beyond our
>>> control.  You can set it via ‘tooltip-frame-parameters’ and then it is
>>> usually honored for X11 tooltips (but not on Windows).
>>
>> Does this apply to system tooltips, or tooltips implemented using a full 
>> Emacs frame?
> 
> I'm not sure what you mean.  "System tooltips" are only used on GTK
> (optionally) and on OS X (unconditionally) and you cannot control their
> border width via the ‘border-width’ frame parameter.  "Tooltips
> implemented using a full Emacs frame" behave like other frames and for X
> these usually obey the ‘border-width’ frame parameter but only at the
> time they are created.  You can't change the border width of an existing
> frame.

Thanks for this clarification :)

>> Indeed, that's what I'd like. x-show-tip works perfectly for me (it
>> supports fonts, faces, etc. properly), expect for the fact that
>> updating the tooltip text causes it to be closed and reopened.
> 
> That's why IMHO tooltips are not useful for your purpose.  What you
> probably want is a normal undecorated frame whose lifetime, position,
> size, visibility and contents would be completely controlled by you.

Indeed, that seems to be the direction this thread is taking. I'm happy write a 
patch for that. Thanks for your help!

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