yes. this was one of the first things Ilearned to do in Flex...abit
back. I'm planning on blogging it when I get some free time. Belowis
some code to do this. The webservice call below fectched children to
the node clicked on when a user clicked the arrow to drill down in the
tree. It worked well using our people soft tree of about 20,000
employees. This line
var node = locTree.addTreeNode('the big boss','123456789');
was hardcoded representing the pres of the company, ok to hardocde as
this position changes very rarely.
HTH
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.macromedia.com/2003/mxml";>
<mx:Script>
<![CDATA[
import mx.controls.treeclasses.*;
var selectedNode:Object;
var getPosnbr:String;
var chosenNode:Object;
function drill(event):Void {
if(selectedNode.getProperty('done') == false) {
var RS = myWS.getDirectReports.result;
for( var i = 0; i < RS.length; i++ ) {
var newNode =
selectedNode.addTreeNode(RS[i].NAME, RS[i].POSNBR);
if(RS[i].SUBCNT > 0)
newNode.setProperty('isBranch',true);
else
newNode.setProperty('isBranch',false);
newNode.setProperty('done', false);
}
selectedNode.setProperty('done',true);
myTree.setIsOpen(selectedNode,false,false,false);
myTree.setIsOpen(selectedNode,true,false,false);
}
}
function initPage():Void {
var locTree= new TreeNode();
var node = locTree.addTreeNode('the big
boss','123456789');
locTree.setIsBranch(node,true);
node.setProperty('done',false);
node.setProperty('isBranch',true);
myTree.dataProvider = locTree;
myTree.setIsOpen(0,true,false,false);
}
]]>
</mx:Script>
<mx:WebService id="myWS"
wsdl="http://foo.com/douglasknudsen/flex/flex.cfc?wsdl";
showBusyCursor="true" fault="alert('Error: ' +
event.fault.faultstring,'Error')">
<mx:operation name="getDirectReports" result="drill()" >
<mx:request>
<posnbr>{getPosnbr}</posnbr>
</mx:request>
</mx:operation>
</mx:WebService>
<mx:Panel id="main" title="Flex Sample" width="100%" height="100%">
<mx:HBox backgroundColor="#FFFFFF" width="100%" height="100%"
horizontalGap="30">
<mx:Tree id="myTree" initialize="initPage()"
width="300"
height="400" change="chosenNode = event.target.selectedItem"
nodeOpen="selectedNode =
event.node;getPosnbr=selectedNode.getProperty('data');
myWS.getDirectReports.send();" >
</mx:Tree>
<mx:VBox width="200">
<mx:Label text="Selected label:
{chosenNode.getProperty('label')}"/>
<mx:Label text="Selected data:
{chosenNode.getProperty('data')}"/>
</mx:VBox>
</mx:HBox>
</mx:Panel>
</mx:Application>
DK
On 8/4/05, Shahnavaz Alware <[EMAIL PROTECTED]> wrote:
>
>
>
> Hi,
>
>
>
> I have huge collection of VO's which I want to present using tree control
> (approx 8000 nodes). For better user experience performance I am planning to
> get only top nodes initially and after that with every node click I will get
> one level down children nodes. This means I will have to add the children
> nodes to the tree dynamically at some specified parent node. Is this
> possible? What is the best way to load huge tree? I have not used tree
> control before with flex so not too familiar with it, so any inputs, ideas,
> comments on this will be appreciated.
>
>
>
>
>
> Thanks,
>
>
>
> Shahnavaz
>
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