Ah, I like this even better than my #outOfWorld: thing from Morphic-bf.635. I'll merge Ken's. 

- Bert -

On 23.01.2013, at 12:39, Nicolas Cellier <nicolas.cellier.aka.nice at gmail.com> wrote:

> Oh, I just saw an alternative wandering in the inbox:
> 
> http://source.squeak.org/inbox/Morphic-kb.619.diff
> 
> Item was added:
> + ----- Method: DockingBarUpdatingMenuMorph>>delete (in category 'as
> yet unclassified') -----
> + delete
> +
> + 	owner ifNotNil: [
> + 		" When deleted remove my menu items, so I can avoid holding
> unwanted references to other objects. They will be updated anyway when
> I become visible again. "
> + 		" The owner notNil condition is necessary because MenuItemMorph >>
> select: sends delete before I become visible, but after the menu items
> are updated. "
> + 		self removeAllMorphs ].
> + 	super delete!
> 
> Nicolas
> 
> 2013/1/22 Nicolas Cellier <nicolas.cellier.aka.nice at gmail.com>:
>> Yes I answered too fast without reading your answer !
>> Your solution is by far simpler.
>> I see that a DockingBarUpdatingMenuMorph always rebuild its menu as
>> the name tells
>> 
>> Nicolas
>> 
>> 2013/1/22 Bert Freudenberg <bert at freudenbergs.de>:
>>> But it gets rebuilt every time it is shown anyway, so why bother making it weak?
>>> 
>>> - Bert -
>>> 
>>> On 22.01.2013, at 13:58, Nicolas Cellier <nicolas.cellier.aka.nice at gmail.com> wrote:
>>> 
>>>> If the menu points weakly, then it should be OK.
>>>> See Morphic-nice.635 in inbox.
>>>> 
>>>> Nicolas
>>>> 
>>>> 2013/1/22 Bert Freudenberg <bert at freudenbergs.de>:
>>>>> 
>>>>> On 22.01.2013, at 13:31, "H. Hirzel" <hannes.hirzel at gmail.com> wrote:
>>>>>> What should we do about the 'Windows' subMenu?
>>>>>> 
>>>>>> Rebuild it any time a menu is called? Or rebuild it any time a window is closed?
>>>>> 
>>>>> 
>>>>> Nil it out as soon as the window is closed. Perhaps like this?
>>>>> 
>>>>> DockingBarUpdatingMenuMorph>>outOfWorld: aWorld
>>>>>       self removeAllMorphs.   "forget references held in menu items"
>>>>>       ^super outOfWorld: aWorld
>>>>> 
>>>>> 
>>>>> - Bert -