How to add an item object as a child for a specified parent node in AdvancedDataGrid in Flex?

Question

Hi all,
          This is the code, to add a object as a child into a specified parent node in AdvancedDataGrid in flex.
<?xml version="1.0" encoding="utf-8"?><mx:Application
xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="onCreationComplete()" width="100%" height="100%">
<mx:Script><![CDATA[
importmx.controls.Alert; 
importmx.collections.IHierarchicalCollectionViewCursor; 
importmx.collections.IHierarchicalCollectionView;  
importmx.collections.ArrayCollection; [
Bindable]private var objectAC:ArrayCollection = newArrayCollection(); 
//This method is used to construct the ArrayCollection 'flatData' 
private function onCreationComplete():void{
var objOne:Object = newObject(); objOne.name =
"Rani"; objOne.city =
"Chennai";objectAC.addItem(objOne);
var objTwo:Object = newObject(); objTwo.name =
"Rani"objTwo.city =
"Bangalore";objectAC.addItem(objTwo);
var objThree:Object = newObject(); objThree.name =
"Raja"; objThree.city =
"Mumbai";objectAC.addItem(objThree);
//This method is used to add one object as a child item for the parent node 'Rani' 
private function addChildItem():void{
var dp:IHierarchicalCollectionView = groupedADG.dataProvider asIHierarchicalCollectionView;  
varcurent:IHierarchicalCollectionViewCursor = groupedADG.dataProvider.createCursor();  
var dummyParentNode:Object = {name:"Rani", city:"New Delhi"};  
var obj:Object = null; 
while(curent.current){
// To get the current node objectobj = curent.current;
// Add Child item, when depth = 1 and Node name should be "Rani" 
if (curent.currentDepth == 1 && obj["GroupLabel"] == "Rani"){
dp.addChild(curent.current, dummyParentNode);
curent.moveNext();
groupedADG.dataProvider = dp;
groupedADG.validateNow();
groupedADG.dataProvider.refresh();
]]>
</mx:Script> 
<mx:AdvancedDataGrid id="groupedADG" x="10" y="15" designViewDataType="tree" defaultLeafIcon="{null}" sortExpertMode="true" width="305" > 
<mx:dataProvider> 
<mx:GroupingCollection id="gc" source="{objectAC}"> 
<mx:grouping> 
<mx:Grouping> 
<mx:GroupingField name="name"/> 
</mx:Grouping> 
</mx:grouping> 
</mx:GroupingCollection> 
</mx:dataProvider> 
<mx:columns> 
<mx:AdvancedDataGridColumn headerText="Name" dataField="name"/> 
<mx:AdvancedDataGridColumn headerText="City" dataField="city"/> 
</mx:columns> 
</mx:AdvancedDataGrid> 
<mx:Button x="10" y="179" label="Open the folder 'Rani'. Then Click this Button" width="305" click="addChildItem()" /> 
</mx:Application> 

Answer 1

Hi,
It's not possible to 'append' a StringItem or a TextField (or any other lcdui.Item object) to a Canvas or GameCanvas. You can only draw lines, draw images, draw text, etc etc, on a Canvas screen. So, you can only 'simulate' the look and feel of a TextField (on a Canvas) by painting it and adding source code for command handling (like key presses). However, this will be quite some work!!
lcdui.Item objects can only be 'appended' to a Form-like Displayable.
Cheers for now,
Jasper