I have an issue, hoping that someone here can point me in right direction.
Google searches have failed me...
I have line chart that I want to control dynamically and add/remove series. I
have seen the Flex cookbook code that does this with column charts, and I have
been able get this to work with line charts just fine.
However, my situation is that I want to have different dataProviders for some
of the series I add. When I set the dataProvider dynamically, it appears to
have no effect on the data (either the data does not show, or if there is a
dataProvider associated with the chart, the series will pull data from that
provider). It's acting as if it is ignoring my attempts to change the
dataProvider.
Here is some relevant sample code where I try to enhance the cookbook
columnseries example to look at alternative source.
private function onComplete():void
{
//initialize our clustered ColumnSet
columnSet = new ColumnSet();
columnSet.type = "clustered";
....
afternoonSeries = new ColumnSeries();
afternoonSeries.yField = "afternoonRainfall";
afternoonSeries.xField = "day";
afternoonSeries.displayName = "Afternoon Rainfall";
afternoonSeries.dataProvider = chartDP; // I added this line to set a
dataProvider
duskSeries = new ColumnSeries();
duskSeries.yField = "duskRainfall";
duskSeries.xField = "day";
duskSeries.displayName = "Dusk Rainfall";
duskSeries.dataProvider = chartDPAlternative; // I added this line to
set a different dataProvider
updateSeries();
}
private function updateSeries():void
{
//reinit columnSet
columnSet.series = new Array();
....
columnSet.series.push(afternoonSeries);
columnSet.series.push(duskSeries);
.....
// put columnSet in an array and set to
// the chart's "series" attribute
rainfallChart.series = [columnSet];
}
Situation 1) My legend shows the two series, but no data is graphed
<mx:ColumnChart id="rainfallChart" >
<mx:horizontalAxis>
<mx:CategoryAxis categoryField="day" />
</mx:horizontalAxis>
<mx:verticalAxis>
<mx:LinearAxis minimum="0" maximum="14" />
</mx:verticalAxis>
</mx:ColumnChart>
<mx:Legend dataProvider="{rainfallChart}" />
Or, Situation 2) In the case below, I get data, but the data in the 2 series
come strictly from chartDP
<mx:ColumnChart id="rainfallChart" dataProvider="{chartDP}">
<mx:horizontalAxis>
<mx:CategoryAxis categoryField="day" />
</mx:horizontalAxis>
<mx:verticalAxis>
<mx:LinearAxis minimum="0" maximum="14" />
</mx:verticalAxis>
</mx:ColumnChart>
<mx:Legend dataProvider="{rainfallChart}" />
----------
So, when I try to attach a dataProvider dynamically to a series, is there some
sort of invalidate event I am supposed to initiate? Has anyone else tried
dynamic replacement of dataProviders on series?
Thanks in advance for any help you may be able to provide.
Brad Wiederholt
[EMAIL PROTECTED]
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