Re: lispref/frames.texi and xmenu.c

[Richard Stallman]

    I did install my doc changes, _except_ those concerned with the above
    problem.  After your changes, there still is an apparent difference
    between `x-popup-menu' and `x-popup-dialog' in this respect, at least
    on my system.  Is the following difference intentional?

    ELISP> (x-popup-menu (read-event) '("TITLE" ("PANE" . ("LINE1" . 1))))

    Then click the mouse, the menu pops up, make it disappear by clicking
    the mouse away from the menu.  Result: the function returns nil,
    fitting your above description.

    ELISP> (x-popup-dialog (read-event) '("PANE" . ("LINE1" . 1)))

    Click the mouse, the dialog pops up,. make it disappear using the
    window manager (on my system, I can not make it disappear by clicking
    away from the menu).  Result: a quit, no return value.

That's exactly the behavior I described to you.
Yes, it is intentional.