FOUND IT!
I created TWO menus. Popped one up and down, left the other standing. 
MouseFocus was nil, the ActiveHand had never activated the spurious menu.

Siomple bug, but I was looking in all the places I didn't understand rather 
than in the simple stuff I had made myself.

Ah well. I live and learn.
I'll get on with my reverse engineering. Much more fun and much more rewarding.

Greetings from a not very proud
--Trygve


At 05.02.2004 10:35, you wrote:
>Many thanks to Andreas and Hernan.
>
>I have made my own subclasses of Diagram and HJPasteUpMorph. I can set up 
>aClassShape on my Canvas, the menu is OK on this shape. I set up aRole, my 
>own subclass of JacarandaShape. The menu stays up.
>
>The ActiveHand mouseFocus is indeed nil, so the trouble seems to be here.
>
>I have studied the owner chain of aClassShape and aRole, they are 
>corresponding. I have carefully stepped through opening menus for both 
>shapes and made a few "irrelevant" changes along the way. I now understand 
>input and output better than before, an essential part of my training.
>
>------------------------------------------------------------
>!!And incidentally, both menus now pop up and down properly!!
>-------------------------------------------------------------
>
>I'll spend a few more hours to pin down what is really the difference and 
>report any interesting results.
>
>All the best
>--Trygve
>
>
>
>
>At 03.02.2004 22:30, you wrote:
>>Try this:
>>
>>MenuMorph example popUpInWorld: World.
>>
>>(will go away when you click anywhere) vs.
>>
>>MenuMorph example popUpInWorld: World.
>>ActiveHand mouseFocus: nil.
>>
>>(will stay up when you click somewhere else)
>>
>>So most likely you're changing the mouse focus someplace else.
>>
>>   - Andreas
>>
>>----- Original Message -----
>>From: "Trygve Reenskaug" <trygver at ifi.uio.no>
>>To: <squeak-dev at lists.squeakfoundation.org>
>>Sent: Tuesday, February 03, 2004 9:26 PM
>>Subject: MenuMorph pops up but not down
>>
>>
>> > I'm working on a variant of Jacaranda to be used for reverse engineering
>>of
>> > Squeak systems. I create a MenuMorph and fill it with entries. I then say
>> >       aMenu popUpEvent: evt in: self world.
>> >       evt wasHandled: true.
>> > (I subclass JacarandaShape and the invokeMenu: evt method is actually in
>> > the superclass. I try to do the same as in an existing subclass,
>> > ClassShape, but my menu stays up so I have to close it manually. I have
>> > inspected the menu, and its stayUp variable = false when i inspect it.)
>> >
>> > Is this a known novice problem?
>> >
>> > Thanks
>> > --Trygve
>> >
>> > --
>> >
>> > Trygve Reenskaug      mailto: trygver at ifi.uio.no
>> > Morgedalsvn. 5A       http://heim.ifi.uio.no/~trygver
>> > N-0378 Oslo           Tel: (+47) 22 49 57 27
>> > Norway
>> >
>> >
>> >
>
>
>--
>
>Trygve Reenskaug      mailto: trygver at ifi.uio.no
>Morgedalsvn. 5A       http://heim.ifi.uio.no/~trygver
>N-0378 Oslo           Tel: (+47) 22 49 57 27
>Norway
>
>
>


-- 

Trygve Reenskaug      mailto: trygver at ifi.uio.no
Morgedalsvn. 5A       http://heim.ifi.uio.no/~trygver
N-0378 Oslo           Tel: (+47) 22 49 57 27
Norway