RE: [flexcoders] Lazy-loaded tree examples

[Tracy Spratt]

"How to handle data that's returned when I'm not exactly sure who
requested it"

Use the AsyncToken for this.

Tracy

________________________________

From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On
Behalf Of Pat Buchanan
Sent: Wednesday, April 25, 2007 2:26 PM
To: flexcoders@yahoogroups.com
Subject: Re: [flexcoders] Lazy-loaded tree examples

 

Gautam - works like a charm!  Thank you very much for replying and
helping out the community!

-Pat

On 4/24/07, Gautam < [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> >
wrote:

Hi Pat,
Sorry for the delay...
I have attached a simple example for the tree behavior you are looking
for.
Go through the children property in the Tree component and the itemOpen
event. That should help. 
Its similar to the previous code i had sent. Just that you will know
exactly how it works now. 

Regards,
Gautam.

 

On 4/24/07, Pat Buchanan < [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
> wrote:

Gautam:

 

Thanks for replying and sharing your knowledge.  I understood most of
what you shared, but I could never get my example working.  Do you have
a runnable example?  Maybe one that just randomly generated children
instead of having to go back to the database?  Once I see how it works,
I can add the call back to the database. 

 

Like Jim, that will be my next hill to conquer.  How to handle data
that's returned when I'm not exactly sure who requested it (if the user
clicks on another item before data is returned)

 

THANKS GAUTAM!



 

On 17 Apr 2007 19:26:00 -0700, Gautam <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]> > wrote: 

hi,
hope this helps:

<mx:Tree id="treeSiteList" width="100%" height="78%"
dataProvider="{acSiteTreeList}" iconFunction="myTreeIcon"
itemOpen="setView(event)"/> 

private function setView(event:TreeEvent):void {
                if(event.item.type == "something" && event.item.fetch ==
false) {
                    myEvent = event; //(myEvent is of type TreeEvent) 
                    //update the dataprovider
                    var obj:ObjectProxy;
                var item:Object;
                var children:ArrayCollection;
                for(var i:int = 0; i < acSomething.length; i++) {
                    obj= new ObjectProxy();
                    obj["type"] = "something";
                    obj["children"] = new ArrayCollection();
                    obj["fetch"] = false;
                    item = myEvent.item;
                    children = item.children;
                    item.fetch = true;
                    children.addItem (obj);
                     acSiteTreeList.itemUpdated(item);
                }

                }
            }

fetch is a property i have used in the dataprovider to tell me if I have
fetched the child nodes previously or not... 

[Embed(source="../assets/someIcon.png")] 
                 private var reqdIconClass:Class;

private function myTreeIcon(item:Object):Class {
                if(item.type == "something") { 
                   return reqdIconClass;
                }else { 
                    return null;
                }
                
            }

                
Regards,
Gautam. 



On 3/31/07, Justin Makeig <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]> > wrote: 

Does anyone know of a public Flex 2 implementation of a lazy-loaded tree
that I could 
reference (e.g. loading children dynamically from the server upon
expanding a node)? From 
my searching I've seen a lot of dead ends and frustration, but no solid
examples. I'd hate to 
(clumsily) reinvent the wheel. Any help would be much appreciated.

Justin