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Support routines for popup menus

From: Lennart Borgman (gmail)
Subject: Support routines for popup menus
Date: Mon, 03 Dec 2007 01:50:36 +0100
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv: Gecko/20071031 Thunderbird/ Mnenhy/

I just noticed that a library in Emacs opened a popup menu in such a way that the line it should give information about was hided. I think I have forgotten to send the two routines below which simplifies poping up menus alined to the point. Could they (or something similar) please be added to Emacs?

(defun point-to-coord (point)
  "Return coordinates of point in selected window.
The coordinates are in the form \(\(XOFFSET YOFFSET) WINDOW)."
  (let* ((pn (posn-at-point point))
         (x-y (posn-x-y pn))
         (x (car x-y))
         (y (cdr x-y))
         (pos (list (list x (+ y 20)) (selected-window))))

(defun popup-menu-at-point (menu &optional prefix)
  "Popup the given menu at point.
This is similar to `popup-menu' and MENU and PREFIX has the same
meaning as there.  The position for the popup is however where
the window point is."
  (let ((where (point-to-coord (point))))
    (popup-menu menu where prefix)))

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