LineChart not updating when DP changes

[jmerrill_2001]

I am adding data to a LineChart with Actionscript.  I have buttons in a
datagrid that add different "fields" (attributes in the XML
dataProvider, for example, jul1509="5") of data by sending a string of
what attribute of the XML should be used for the yAxis of the LineSeries
in the addToChart method, as shown below.  This works fine. However,
when I go to change the dataProvider, even though I can see the method
to change the DP is indeed called, and the new data in the dataProvider
is indeed different, but the LineChart does not alter or change, even
though I also call linechart.invalidatestyles() to trigger a redraw.  

Relevant AS:

private function
onXMLCompositeLoadComplete(event:XMLFileLoaderEvent):void
{
        _isXML = true;
        _compositeAssociateMeasures = new
XMLListCollection(_chartXML.results.employees.employee.(@role ==
"associate").datasets.dataset.(@type="pretest").measure);
        _compositeManagerMeasures = new
XMLListCollection(_chartXML.results.employees.employee.(@role ==
"manager").datasets.dataset.(@type="pretest").measure);
/* XML looks like this:
  <xml>
      <results>
    <employees>
      <employee role="associate">
        <datasets>
          <dataset type="pretest" name="Pre-test Agregate Associate
Scores">
            <measure category="Architecture" id="A 1" jul1509="5"
aug1209="7" sept0309="6" />
                <measure category="Architecture" id="A 2" jul1509="7"
aug1209="8" sept0309="7" />
                ...etc.  */
}
private function addToChart(itemArray:Array):void  
{  
        for each(var item:String in itemArray)
        {
                var newLS:LineSeries = new LineSeries();  
                var newStroke:Stroke = new Stroke();
                if(_colorId ==
_chartXML.config.ui.colors.color.length()) _colorId = 0;
                newStroke.color =
_chartXML.config.ui.colors.color[_colorId].@value;
                newStroke.weight = 2;
                if(_isXML) newLS.yField = "@"+item; else newLS.yField =
item;
                newLS.displayName = item;  
                newLS.setStyle('showDataEffect', 'interpolateIn');
                newLS.dataProvider = _compositeAssociateMeasures;  
                newLS.setStyle('lineStroke', newStroke);
                var linechartSeriesArray:Array = linechart.series;  
                linechartSeriesArray.push(newLS);  
                linechart.series = linechartSeriesArray;  
                linechart.invalidateSeriesStyles();  
                _currentChartItems.push(item)
                _colorId++;
        }
}

Relevant MXML:

<mx:LineChart id="linechart" seriesFilters="[]" color="0x323232"
        height="250"  width="{containerCanvas.width-25}"
showDataTips="true"
  dataProvider="{_compositeAssociateMeasures}"
themeColor="#FFA9A9">
        <mx:horizontalAxis>
    <mx:CategoryAxis id="hAxis" categoryField="@id" />
        </mx:horizontalAxis>
        <mx:horizontalAxisRenderers>
    <mx:AxisRenderer axis="{hAxis}" canDropLabels="false"
color="0x666666"/>
        </mx:horizontalAxisRenderers>
        <mx:verticalAxisRenderers>
                <mx:AxisRenderer axis="{vAxis}" color="0x666666" />
        </mx:verticalAxisRenderers>
        <mx:verticalAxis>
                <mx:LinearAxis id="vAxis" minimum="1" maximum="10"/>
        </mx:verticalAxis>
 </mx:LineChart>

Any ideas?  Thanks.


Jason Merrill

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[jmerrill_2001]

hmmmm... anyone?

[Omotola Anjorin-2]

try update manually using the id of the linechart (in the dp change event handler) like...


linechartid.dataProvider = dataprovider.




________________________________
From: jmerrill_2001 <jason.merrill@...>
To: flexcoders@...
Sent: Mon, November 9, 2009 4:43:24 PM
Subject: [flexcoders] Re: LineChart not updating when DP changes

 
hmmmm... anyone?


 


     

[jmerrill_2001]

>>try update manually using the id of the linechart (in the dp change event handler) like...linechartid.dataProvider = dataprovider.

Huh?  If you see in my code, that's exactly what I'm doing and why I'm confused the chart isn't changing even though the data is different.