You might want to file a feature request in Jira for CollectionEvent,
CollectionEventKind, and CollectionView to be extended to listen for
CollectionEvents on individual items inside a Collection.
Still won't help if you're adding objects that contain a collection field,
though :)
-Josh
On Fri, Jun 20, 2008 at 10:17 AM, Josh McDonald <[EMAIL PROTECTED]> wrote:
> Say I have a class - assume everything is bindable for the sake of my
> typing in gmail ;-)
>
> class MyObj {
> name : String;
> id : Number;
> address : Address;
> }
>
> I make an ArrayCollection "myCollection" containing a bunch of MyObjs.
>
> var tmp : MyObj = MyObj(myCollection.getItemAt(7));
>
> tmp.name = "Blue"; //Should generates event
> tmp.address = new Address("123 Fake St"); //Also should generate event
>
> tmp.address.postCode = 5432; //Should not.
>
> Say I add the instance myFoo to an ArrayCollection:
>
> myCollection.add(myFoo);
>
> Inside CollectionView, the following happens (more or less, not real
> variable / class names, and I can't remember the order off the top of my
> head):
>
> 1. Add foo to the internal storage
> 2. Is foo an IEventDispatcher? If not, goto 4
> 3. foo.addEventListener(PropertyChangeEvent, itemChangedHandler)
> 4. this.dispatchEvent(CollectionEventKind.ADD)
>
> Now the default behaviour for objects is to dispatch PropertyChangedEvents
> only when the actual value of their fields is updated. When you call:
>
> tmp.address.postcode = 7654;
>
> Address will dispatch a PropertyChangedEvent, but tmp will not. The end
> result of this is that the collection doesn't know about the change.
>
> In your case, you're adding myOtherArr to myArr. When you change something
> inside myOtherArr, it dispatches a CollectionEvent, but not a
> PropertyChangeEvent. And since CollectionView is only listening to
> PropertChange and not CollectionEvent on the objects that it's watching, it
> never knows about the change.
>
> You might get notified when you add or delete something in myOtherArr,
> because it probably dispatches a PropertyChangeEvent for myOtherArr.length.
> But don't quote me on that ;-)
>
> Hope that helps! I only know because I spent a lot of time in
> CollectionView.as a week or so ago building an indexer for lists :)
>
> -Josh
>
>
> On Fri, Jun 20, 2008 at 6:08 AM, Durres76 <[EMAIL PROTECTED]> wrote:
>
>> Hi,
>> collectionEventKind.Update does not seem to fire when subitems within
>> a collection change, i.e..
>> myArr = new ArrayCollection();
>> myOtherArr = new ArrayCollection();
>> myArr.addItem(myOtherArr);
>>
>> the update event does not fire if myOtherArr changes. it does if myArr
>> changes.
>>
>>
>> ------------------------------------
>>
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>>
>>
>>
>>
>
>
> --
> "Therefore, send not to know For whom the bell tolls. It tolls for thee."
>
> :: Josh 'G-Funk' McDonald
> :: 0437 221 380 :: [EMAIL PROTECTED]
--
"Therefore, send not to know For whom the bell tolls. It tolls for thee."
:: Josh 'G-Funk' McDonald
:: 0437 221 380 :: [EMAIL PROTECTED]
