Flex GroupingCollection: Loop through the children

Question

I am using a GroupingCollection to bind my advanceddatagrid. I have used groupingcollection to group the data by date.

Now I need to select the data in the datagrid through the code. Does anyone have any idea as to how to do this? I need to loop through the adg's dataprovider and select the item that matches the criteria for the selection.

Please advise

Thanks :)

Answer 1

The source property should contain the flat representation of the data.

Answer 2

Okay, depending on how the question in interpreted, this code will find the items that match the grouping year that is selected. I added a click=findStuff(event) to the mx:AdvancedDataGrid, as shown here:

[Bindable] 
public var myData:ArrayCollection = new ArrayCollection([
 {name:'Denise', grad:'2000'},
 {name:'Steph', grad:'1990'},
 {name:'Jane', grad:'2000'},
 {name:'Nicole', grad:'2000'},
 {name:'Donna', grad:'1990'}]);

public function findStuff(e:Event):void {
 var groupColl:GroupingCollection = adGrid.dataProvider.source;
 var items:Object = groupColl.source;

 var ac:ArrayCollection = new ArrayCollection();
 for (var i:int=0; i<items.length; i++) {
  if (items[i].grad == e.target.text) {
   ac.addItem(items[i].name);
  }
 }
 Alert.show("selected items: " + ac.toArray());
}

<mx:GroupingCollection id="coll" source="{myData}">
 <mx:Grouping>
  <mx:GroupingField name="grad" />
 </mx:Grouping>
</mx:GroupingCollection>

<mx:AdvancedDataGrid id="adGrid" dataProvider="{coll}"
                         click="findStuff(event)"
                         initialize="coll.refresh()">
 <mx:columns>
  <mx:AdvancedDataGridColumn headerText="name" dataField="name"/>
 </mx:columns>
</mx:AdvancedDataGrid>

Note that first I get the GroupingCollection from the AdvancedDataGrid dataProvider, then I get the items from the GroupingCollection. These could be combined into one step, but this way is more readable for the example. Not knowing exactly what data you're looking for I just grab the name field from the data item but there's no reason you couldn't grab the whole item.

Hopefully this is a step in the right direction for you.