[FLEX-34140] Add oldValue property to Collection event( CollectionEventKind.REFRESH/CollectionEventKind.RESET )

• Type: Task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Collections
• Assignee: Unassigned
• Reporter: Gary Yang
• Created: 12/Mar/14 19:24
• Updated: 13/Mar/14 20:38

Description

For a CollectionEvent, when event kind is

CollectionEventKind.Add REPLACE REMOVE MOVE UPDATE

it is revertable, because for ADD/REMOVE, developers can call REMOVE/ADD, for MOVE, there's a oldLocation; for REPLACE: the items are PropertyChangeEvent which has oldValue.

but for CollectionEventKind.REFRESH and RESET, it is NOT revertable!!!

If Flex can add a new oldValue or oldList, ( or depreciated: give developers a event right before dispatching ), Flex will be better!!!

Issue Links

• relates to: FLEX-34143 Give <fx:Binding /> an event handle.