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https://issues.apache.org/jira/browse/FLEX-35007?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Justin Mclean updated FLEX-35007:
---------------------------------
Labels: easyfix easytest (was: )
> Error 1009 in AdvancedListBase after re-binding backing array collection
> ------------------------------------------------------------------------
>
> Key: FLEX-35007
> URL: https://issues.apache.org/jira/browse/FLEX-35007
> Project: Apache Flex
> Issue Type: Bug
> Components: Advanced Data Grid
> Affects Versions: Apache Flex 4.14.1
> Reporter: Skylar Sutton
> Labels: easyfix, easytest
>
> h2. Background
> We have an advanced datagrid defined as such:
> {code:borderStyle=solid}
> <mx:AdvancedDataGrid
> headerStyleName="headerStyle"
> headerSortSeparatorSkin="mx.skins.ProgrammaticSkin"
> id="myGrid"
> designViewDataType="tree"
> displayItemsExpanded="true"
> treeColumn="{supersessionTreeGrid.columns[1]}"
> width="100%"
> maxWidth="{this.width-10}"
> height="100%"
> dataProvider="{new HierarchicalData(model.myGridData)}"
>
> verticalGridLines="false"
> sortableColumns="false"
> draggableColumns="false"
> borderAlpha="1"
> folderClosedIcon="{null}"
> folderOpenIcon="{null}"
> defaultLeafIcon="{null}"
> variableRowHeight="true"
> borderVisible="true"
> columns="{model.myGridCOlumns}"
> </mx:ExtendedAdvancedDataGrid>
> {code}
> If the ArrayCollection myGridColumns is rebound, from a click that originates
> within the grid, we're getting a 1009 error on AdvancedListBase:9250
> {code:title=AdvancedListBase.as:9249|borderStyle=solid}
> var rowData:BaseListData = rowMap[item.name];
> lastUID = rowData.uid;
> {code}
> h2. Root Cause
> It appears that the AdvancedListBase is trying to execute a mouseOverHandler
> event against the OLD row data (prior to the rebind). Since the new row data
> does not contain the item in question, the rowMap lookup returns a null
> object, and "rowData.uid" pops a NPE.
> The simple fix is to just wrap another null check around that... but I'm not
> sure if it's symptmatic of something larger (e.g. should the event be
> supressed higher up?).
> h2. Simple Fix
> {code:title=AdvancedListBase.as:9247|borderStyle=solid}
> ...
> if (lastHighlightItemRenderer && highlightUID)
> {
> var rowData:BaseListData = rowMap[item.name];
> if (!rowData) {
> return;
> }
> lastUID = rowData.uid;
> }
> ...
> {code}
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