RE: [flexcoders] How to populate tree control from web service re sult (server side java objects)

Wed, 20 Apr 2005 11:11:23 -0700

Jeff
 
I appreciate the response , but i think i didn't explain myself very well ,
I know i can implement the API , and i know i can write a method that loads the tree ,
BUT - there is an easy way to do this by assigning the result of the Web Service as the DataProvider of the Tree.
the only problem is that i found that you have to access an object called backingObject (macromedia internal)
and macromedia guys say there is more formal way doing this , which i failed to do .
 
in short here is the code. you can see the reference to this object if you remove it IT WON'T WORK.
 
<mx:script>
function myLabelFunc(item):String {
   var type=typeof item;
   
   if (item.backingObject.filterName == null){
    return item.backingObject.categoryName;
   }else{
    return item.backingObject.filterName + ", " + item.backingObject.filterGuid ;
   }
       }
</mx:script>
 
<mx:WebService id="UserCategoriesWS" result="onResult(event)" wsdl="@ContextRoot()/services/UserCategoriesWS?wsdl"
  showBusyCursor="true"
        fault="alert(event.fault.faultstring)">
        <mx:operation name="getUserFilterCategories">
    <mx:request>
         <userName>userName</userName>
     </mx:request>
  </mx:operation>
   </mx:WebService>
 
 
<mx:Tree id="filterTree" labelFunction="myLabelFunc" dataProvider="{UserCategoriesWS.getUserFilterCategories.result}" width="100%" height="100%" fontSize="10"/>
 
 
 

From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Jeff Krueger
Sent: Wednesday, April 20, 2005 21:04
To: [email protected]
Subject: RE: [flexcoders] How to populate tree control from web service re sult (server side java objects)

I think what you want to do is create a object that implements the TreeDataProviderAPI.  In this object it will be responsible for calling your webservice and get that data back and put it into AS objects.  Then create your tree.  At any given node you can have additional information.  So in the DATA part of each node stick your AS object.  Then when the user clicks on a node , you will have a AS object that represents your java object that you can do something with.  That being said I have tried to implement the TreeDataProviderAPI and was frustrated by it and the lack of documentation.  I was trying to create a lazy fetch tree control.  And trying to figure out the events, and the way everything is linked can be difficult
 
Jeff
 

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