Revision 1278761

Transferred from the Adobe Open Source Subversion Repository

Revision: 19395
Author:   hmuller@adobe.com
Date:     2010-12-15T19:17:26.366313Z

Log Message: 
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Improved List scroll positioning after a dataProvider refresh for one case: if the caret item is visible, after a refresh attempt to scroll so that it's in the same relative position, and select it.

DataGroup/getElementAt(index) now returns the item renderer for index, even if index is not a valid dataProvider index (anymore).

QE notes: Four Mustella tests to be updated (Jacob, Ella).
Doc notes: 
Bugs: SDK-23283
Reviewer: Ryan
Tests run: checkin, mustella
Is noteworthy for integration: no

Modified Paths:
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<path kind="file" action="M">/private/flex/sdk/branches/hero_private/frameworks/projects/spark/src/spark/components/DataGroup.as</path>
<path kind="file" action="M">/private/flex/sdk/branches/hero_private/frameworks/projects/spark/src/spark/components/gridClasses/IGridItemRenderer.as</path>
<path kind="file" action="M">/private/flex/sdk/branches/hero_private/frameworks/projects/spark/src/spark/components/List.as</path>
<path kind="file" action="M">/private/flex/sdk/branches/hero_private/frameworks/projects/spark/src/spark/layouts/supportClasses/LayoutBase.as</path>
<path kind="file" action="M">/private/flex/sdk/branches/hero_private/frameworks/projects/spark/src/spark/components/supportClasses/ListBase.as</path>
<path kind="file" action="M">/private/flex/sdk/branches/hero_private/frameworks/projects/spark/src/spark/components/supportClasses/GroupBase.as</path>