Re: What is the difference between down-mouse-3 and mouse-3

[Ye Wenbin]

On Tue, 15 Apr 2008 22:45:52 +0800, Stefan Monnier  
<address@hidden> wrote:

> Don't know, it works for me (tried both with the trunk and with 22.1).
> What do you mean by "does not work"?
Really, I test both emacs22 (GNU Emacs 22.1.1 (i486-pc-linux-gnu,  
GTK+ Version 2.10.11) of 2007-11-21 on vernadsky)
and emacs23(GNU Emacs 23.0.60.7 (i686-pc-linux-gnu, GTK+ Version 2.10.11)  
of 2008-03-29 on ywb-laptop),
if bind the menu to mouse-3, the command in submenu does not called. I  
test as following:
 1. `emacs -q' start emacs
 2. in *scratch* buffer, paste code:
(define-derived-mode foo-mode text-mode "Foo"
  "Test major mode"
  )
(easy-menu-define foo-menu foo-mode-map "My own menu"
  '("Foo"
    ["Next Line" next-line t]
    ("Sub Menu"
     ["Previous Line" previous-line t])))

(define-key foo-mode-map [mouse-3] 'mouse-popup-menubar-stuff)

 3. M-x eval-buffer
 4. click right mouse button, select "Sub Menu" "Previous Line", the  
cursor does not
 go to previous line, but if select "Next Line", the cursor moves.

> This said, binding it to down-mouse-3 is *much* better so you can do
> "press-button, select-entry, release-button".
That may be the answer. But if it is true that bind mouse menu to mouse-3  
doesn't work for submenu,
I think the elisp manual should emphasize this. After I figure out the  
problem, I only find a paragraph
metion it:

22.17.2 Menus and the Mouse

   It's often best to use a button-down event to trigger the menu.  Then
the user can select a menu item by releasing the button.

--
Best Regards,
Ye Wenbin