how trigger when data provider of the flex chart changes?

Question

Is it possible to trigger when data provider of the flex chart changes ? Any ideas guys ? i used oncreation complete but it is not working when change data source of the chart dynamically.

Answer 1

Try Changewatcher class.

import mx.binding.utils.ChangeWatcher;
import mx.events.PropertyChangeEvent;

ChangeWatcher.watch(this, "dataProvider", watchHandler);

private function watchHandler(e:PropertyChangeEvent):void
 {
                    // Do Something
 }

Otherwise try this, Add collection change listener to chart itself like below.

chart.addEventListener(CollectionEvent.COLLECTION_CHANGE, onChartDataProviderChange);

private function onChartDataProviderChange(e:CollectionEvent):void
     {
                        // Do Something
     }

if(condition1){
chart.dataprovider=provider1;
} 
if(condition2){
chart.dataprovider=provider2;
}

Hope it helps.