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    <title>topic Floating Datagrid Graphic Problem in ArcGIS API for Flex Questions</title>
    <link>https://community.esri.com/t5/arcgis-api-for-flex-questions/floating-datagrid-graphic-problem/m-p/675051#M15161</link>
    <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;I have a floating datagrid in the QueryBuilderWidget from Sample Viewer1.3. This widget was written with a datagrid in the viewstack, and I can created a list event that highlights the graphic on rollover. However, on the Floating Datagrid, I cannot get this to work: I get Error #1009: Cannot access a property or method of a null object reference. The code that generated the error is 'vQW.onItemRollover(event) from this code block: &lt;/SPAN&gt;&lt;PRE class="plain" name="code"&gt;private function onItemRollOver(event:ListEvent):void
&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; {&amp;nbsp; 
&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; highlightedGraphic = findGraphicByAttribute(event.itemRenderer.data)
&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; var vQW:QueryBuilderWidget = _bWidget as QueryBuilderWidget;
&amp;nbsp;&amp;nbsp;&amp;nbsp; vQW.onItemRollOver(event);
&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; highlightedGraphic = findGraphicByAttribute(event.itemRenderer.data)
&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; }&lt;/PRE&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Any advice will be greatly appreciated.&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Thanks,&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Jim Faron&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
    <pubDate>Mon, 19 Apr 2010 18:52:23 GMT</pubDate>
    <dc:creator>JamesFaron</dc:creator>
    <dc:date>2010-04-19T18:52:23Z</dc:date>
    <item>
      <title>Floating Datagrid Graphic Problem</title>
      <link>https://community.esri.com/t5/arcgis-api-for-flex-questions/floating-datagrid-graphic-problem/m-p/675051#M15161</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;I have a floating datagrid in the QueryBuilderWidget from Sample Viewer1.3. This widget was written with a datagrid in the viewstack, and I can created a list event that highlights the graphic on rollover. However, on the Floating Datagrid, I cannot get this to work: I get Error #1009: Cannot access a property or method of a null object reference. The code that generated the error is 'vQW.onItemRollover(event) from this code block: &lt;/SPAN&gt;&lt;PRE class="plain" name="code"&gt;private function onItemRollOver(event:ListEvent):void
&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; {&amp;nbsp; 
&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; highlightedGraphic = findGraphicByAttribute(event.itemRenderer.data)
&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; var vQW:QueryBuilderWidget = _bWidget as QueryBuilderWidget;
&amp;nbsp;&amp;nbsp;&amp;nbsp; vQW.onItemRollOver(event);
&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; highlightedGraphic = findGraphicByAttribute(event.itemRenderer.data)
&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; }&lt;/PRE&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Any advice will be greatly appreciated.&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Thanks,&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Jim Faron&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Mon, 19 Apr 2010 18:52:23 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcgis-api-for-flex-questions/floating-datagrid-graphic-problem/m-p/675051#M15161</guid>
      <dc:creator>JamesFaron</dc:creator>
      <dc:date>2010-04-19T18:52:23Z</dc:date>
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