> > wrote:
>>> >
>>> > I am running through the "Spec UI Framework" tutorial, and in it has a
>>> widget class inherited from "ComposablePresenter" (ComposablePresenter
>>> subclass: #WidgetClassList). But for some reason the
>>> "whenSelectedItemChanged:" method call does not execute when I select
>>> any item on the GUI list. Is there anything I'm missing?
>>> >
>>> > I posted this earlier on the list, and someone suggested I try
>>> "whenActivatedDo:" or "whenSelectionChangedDo:", but it doesn't do
>>> anything as well. The code looks like this:
>>> >
>>> > whenSelectedItemChanged: aBlock
>>> >     Transcript show: 'should get here; cr.
>>> >
>>> > I am using Pharo 7.
>>>
>>> Can you FileOut the entire sample class and attached it?
>>>
>>> cheers -ben
>>>
>>
>> Ok, I filed out and it exported the file 'WidgetClassList.st' . This is
>> the contents of the file:
>>
>> 'From Pharo7.0.3 of 12 April 2019 [Build information:
>> Pharo-7.0.3+build.158.sha.0903ade8a6c96633f07e0a7f1baa9a5d48cfdf55 (64
>> Bit)] on 16 July 2019 at 3:58:28.785036 pm'!
>> ComposablePresenter subclass: #WidgetClassList
>> instanceVariableNames: 'list'
>> classVariableNames: ''
>> poolDictionaries: ''
>> category: 'QuotesProg'!
>>
>> !WidgetClassList methodsFor: 'initialization' stamp: 'SteveQuezadas
>> 7/10/2019 14:07'!
>> initializeWidgets
>> list := self newList.
>> list items: (AbstractWidgetPresenter allSubclasses
>> sorted: [:a :b | a name < b name ]).
>> self focusOrder add: list.! !
>>
>>
>> !WidgetClassList methodsFor: 'events-shortcuts' stamp: 'SteveQuezadas
>> 7/15/2019 21:40'!
>> whenSelectedItemChanged: aBlock
>> Transcript show: 'got here'; cr.
>> ! !
>
> Looking at ListPresenter>>whenSelectedItemChanged: aBlock
> it is registering aBlock on selectionHolder using #whenChangedDo:
> Reviewing selectionHolder "Code search...>References to it" I see that
> selectionHolder is initialized as an instance of SelectionHolderClass.
>
> So it seems you are expecting whenSelectedItemChanged: to be called
> every time the-selection-is-changed
> when actually it is only called once (by your application) to register
> the block-to-be-called when the-selection-is-changed.
> You don't seem to have done any such registration.
>
> cheers -ben