GNU bug report logs - #28620
Mouse drag event records wrong window for release when crossing frames

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From: Robert Weiner <rsw <at> gnu.org>
To: Eli Zaretskii <eliz <at> gnu.org>, martin rudalics <rudalics <at> gmx.at>, Alan Third <alan <at> idiocy.org>, 28620 <at> debbugs.gnu.org
Subject: bug#28620: Interact directly on Emacs bug#28620: mouse drag event records wrong release window
Date: Wed, 11 Oct 2017 21:47:16 -0400

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On Wed, Oct 11, 2017 at 9:35 PM, Robert Weiner <rsw <at> gnu.org> wrote:

>
> Is there any way to deal with external window z-order layering such that
> one can tell within Emacs whether the topmost OS-level window at an
> absolute mouse position is an Emacs frame or not?
>

​One idea is to expand frame-list-z-order with a 2nd optional argument of
all-display-windows-flag which when non-nil would include all of the
OS-level windows in the returned list.  Maybe a new object type or
frame-variant is needed for this.  Then just add another function that
returns the edge coordinates for such windows and we could account for them
in any z-ordering computations.  What do you think?

Bob
​

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