bug#28620: Interact directly on Emacs bug#28620: mouse drag event records wrong release window

[Robert Weiner]

On Wed, Oct 11, 2017 at 9:35 PM, Robert Weiner <rsw@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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