On Sat, Oct 14, 2017 at 2:47 PM, Robert Weiner wrote: > On Sat, Oct 14, 2017 at 1:16 PM, Robert Weiner wrote: > >> it still leaves the issue of recognizing whether a drag release event >> maps to an Emacs frame or not (when the frame is covered by an external >> app's window). >> > ​I have written a Python script that can be used to get this answer. (It uses the Python-to-Objective-C bridge library that exposes the relevant Mac APIs to Python)​. The script takes two arguments, X and Y screen pixel coordinates, gets a list of all visible application windows in Z-order and then prints the application name of the first window that intersects the (X,Y) position, if any. If that window is an Emacs frame, we have a match and otherwise, we don't. This is a short script that really needs to be recoded into an Objective-C function that can be exposed to Emacs Lisp. If anyone who is familiar with macOS Objective-C code would want to work with me on this, email me and I'll provide the Python code. It is only about 28 lines. -- Bob