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From João Fernandes (JIRA) <j...@apache.org>
Subject [jira] [Commented] (FLEX-33398) ComboBox loses selectedItem when dataProvider dispatch reset event
Date Tue, 19 Feb 2013 14:57:14 GMT

    [ https://issues.apache.org/jira/browse/FLEX-33398?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13581328#comment-13581328
] 

João Fernandes commented on FLEX-33398:
---------------------------------------

Alex the problem is that collection is ICollectionView so we don't have many options to find
the current selected object and in my opinion the combobox shouldn't reset the current selected
item just because there was a refresh in it's dataProvider. If the selectedItem still exists
in the new dataProvider, I think the selection should be maintained.
                
> ComboBox loses selectedItem when dataProvider dispatch reset event
> ------------------------------------------------------------------
>
>                 Key: FLEX-33398
>                 URL: https://issues.apache.org/jira/browse/FLEX-33398
>             Project: Apache Flex
>          Issue Type: Bug
>          Components: mx: ComboBox
>            Reporter: João Fernandes
>   Original Estimate: 1m
>  Remaining Estimate: 1m
>
> During a reset Event, combobox does reset the selectedItem but doesn't respect the fact
the current selectedItem might be included in the new source.
> What I propose is to change
>  else if (ce.kind == CollectionEventKind.RESET)
>             {
>                 collectionChanged = true;
>                 if (!selectedIndexChanged && !selectedItemChanged)
>                     selectedIndex = prompt ? -1 : 0;
>                 invalidateProperties();
>             }
> to 
>  else if (ce.kind == CollectionEventKind.RESET)
>             {
>                 collectionChanged = true;
>                 if (!selectedIndexChanged && !selectedItemChanged &&
!collection.contains(selectedItem))
>                     selectedIndex = prompt ? -1 : 0;
>                 invalidateProperties();
>             }

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