bug#2360: 23.0.90; redirect-frame-focus induces translucent tooltips/frames

[Stephen Berman <stephen.berman@gmx.net>]

On Thu, 19 Feb 2009 23:06:42 +0800 Jason Rumney <jasonr@gnu.org> wrote:

> Stephen Berman wrote:
>> 3. M-: (redirect-frame-focus (selected-frame) (previous-frame))
>>    a. Move mouse cursor over a tool bar icon and observe that the
>>       tooltip is translucent and very light, barely visible.
>>    b. Type `C-x 5 2' and observe that the newly created frame is
>>       likewise translucent and barely visible.
>>   
>
>
> I can confirm that 3a is reproducible on Windows too (even without steps 1 and
> 2), but I do not see 3b (but that seemed to depend on font, font-size and
> font-backend in your tests, so maybe there is a different combination that can
> reproduce 3b on Windows).
>
> I would guess this was introduced when the transparency patch went in or some
> time after, rather than by the unicode merge.

This seems likely; indeed, when I start Emacs like this:

$ emacs -Q --eval "(setq default-frame-alist '((alpha . 30)))"

and then type `C-x 5 2', the newly created frame has about the same
appearance as what I see after calling redirect-frame-focus.
(Interestingly, and something I failed to notice in my OP, the tooltips
generated from the transparent frame are not transparent; i.e., in the
case of my OP, only the tooltips of the first frame are transparent).

Steve Berman