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https://issues.apache.org/jira/browse/FLEX-33813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13792592#comment-13792592
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Maurice Amsellem commented on FLEX-33813:
-----------------------------------------
spotted the issue:
{code}
Grid.as
line 850:
const gridViewLayout:GridViewLayout = centerGridView.gridViewLayout;
const gridMaxVSP:Number = contentHeight - height;
const centerContentHeight:Number =
Math.ceil(gridViewLayout.gridDimensionsView.getContentHeight());
const centerMaxVSP:Number = centerContentHeight - centerGridView.height;
const vsp:Number = (centerMaxVSP / gridMaxVSP) * value;
centerGridView.verticalScrollPosition = vsp;
{code}
Called by : Grid.verticalScrollPosition = 0;
Problem: contentHeight is NaN, and centerContentHeight is NaN, so all
computations return NaN, and no renderers are displayed.
> Datagrid goes blank when assigning new dataProvider.source and calling refresh
> ------------------------------------------------------------------------------
>
> Key: FLEX-33813
> URL: https://issues.apache.org/jira/browse/FLEX-33813
> Project: Apache Flex
> Issue Type: Bug
> Components: Spark: DataGrid
> Affects Versions: Apache Flex 4.10.0
> Environment: OS X, Apache Flex 4.10.0
> Reporter: Gareth Daniel Smith
> Assignee: Maurice Amsellem
> Labels: datagrid, spark
> Attachments: DataGridRender.zip
>
>
> Given a spark DataGrid with an ArrayCollection dataProvider, the DataGrid can
> erroneously go blank in the following situation:
> - the DataGrid has been scrolled down so it is not at the very top.
> - the .source property is changed on the dataProvider to be a new Array where
> the new values in the Array are also different objects to the objects in the
> previous .source Array.
> - .refresh() is called on the DataGrid
> This is possibly the same bug as FLEX-33066.
> I will attach a minimal test case.
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