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

From: Robert Weiner <[email-masked]>
Date: Wed, 4 Oct 2017 16:07:56 -0400

On Wed, Oct 4, 2017 at 2:59 PM, Alan Third <[email-masked]> wrote:

>
> It looks like there’s maybe a neater way to get the current frame
> under the mouse...
>
>     Lisp_Object frame = Qnil;
>     NSWindow *w = [NSApp windowWithWindowNumber:
>                          [NSWindow windowNumberAtPoint:[NSEvent
> mouseLocation]
>                            belowWindowWithWindowNumber:0]];
>     if (w != nil)
>       XSETFRAME (frame, ((EmacsView *)[w delegate])->emacsframe);
>
>
The ​mouseDown​ function (called by the various mouseUp functions) uses
`emacsframe' to set the appropriate frame.
How does the above modify emacsframe?  Doesn't XSETFRAME just set the value
of the local `frame'?

Bob