You might want to look at the way PDA and PDAMorph interact, and how
PluggableListMorphs are used by PDA.  When the model (or models,
depending on how you personally interpret the structures in PDA), the
related PluggableListMoprh(s) in the window are told explicitly that
there's been a change, and what message to send to update the display
accordingly.

Marcus Pedersén wrote:
> After I have changed the list in my PluggableListMorph with pLM list:
> newList.
> I sent the message changed to my PluggableListMorph, to my SystemWindow,
> to my Morph ( not all in once) and what happens is that the list in my
> PluggableListMorph is updated with the missing item and the GUI remains
> the same. I want it the oposite way.
> Please help!
> Marcus
> ----- Original Message ----- From: "karl" <karl.ramberg at chello.se>
> To: "The general-purpose Squeak developers list"
> <squeak-dev at lists.squeakfoundation.org>
> Sent: Wednesday, November 09, 2005 9:04 PM
> Subject: Re: (newbee) Problem with PluggableListMorph
> 
> 
>> Marcus Pedersén wrote:
>>
>>> Hi!
>>> I have a problem with a PluggableListMorph. If I remove an item in my
>>> list the GUI is not updated and still shows the removed item.
>>> Perhaps I'm using the wrong methods?
>>> a PluggableListMorph (pLM).
>>>  | collection |
>>> collection := pLM getList.
>>> collection copyWithoutIndex: (pLM getCurrentSelectionIndex).
>>> pLM list: collection.
>>>  If I inspectIt (the code) I see that the removed item is gone in the
>>> list and if I inspect on the GUI I see that the item is gone as well.
>>> But it is still present in the visual list(GUI). For some reason the
>>> GUI is not updated.
>>> What am I doing wrong?
>>>  Many thanks in advance!
>>> Marcus
>>>
>>> ------------------------------------------------------------------------
>>>
>>>
>>>
>> It needs to be told to update it self, like 'self changed' or
>> something similar.
>> Karl
>>
>>
>>
> 
> 
> 
> 
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