I'm facing the same error:
TreeModelChangedEvent
TreeModelChangedEventDetail
don't exist anymore. Haven't find anything in the documentation, any
suggestion for this?.
Thanks,
Pepe.
--- In flexcoders@yahoogroups.com, "Bryan Choi" <[EMAIL PROTECTED]> wrote:
>
> MyCustomTreeDataDescriptor implements ITreeDataDescriptor, but it's
wrong.
>
> ==================
>
> package
> {
> import mx.collections.ICollectionView;
> import mx.collections.IViewCursor;
> import mx.events.TreeModelChangedEvent;
> import mx.events.TreeModelChangedEventDetail;
> import mx.controls.treeClasses.*;
>
> public class MyCustomTreeDataDescriptor implements ITreeDataDescriptor
> {
>
> // The getChildren method requires the node to be an Object
> // with a children field.
> // If the field contains an ArrayCollection, it returns the field
> // Otherwise, it wraps the field in an ArrayCollection.
> public function getChildren(node:Object,
> model:Object=null):ICollectionView
> {
> try
> {
> if (node is Object)
> {
>
> if(node.children is ArrayCollection){
> return node.children;
> }else{
> return new ArrayCollection(node.children);
> }
> }
> }
> catch (e:Error)
> {
> trace("[Descriptor] exception checking for getChildren");
>
> }
> return null;
> }
>
> // The isBranch method simply returns true if the node is an
> // Object with a children field.
> // It does not support empty branches, but does support null
children
> // fields.
> public function isBranch(node:Object, model:Object=null):Boolean
> {
> try
> {
> if (node is Object)
> {
> if (node.children != null)
> {
> return true;
> }
> }
> }
> catch (e:Error)
> {
> trace("[Descriptor] exception checking for isBranch");
> }
> return false;
> }
>
> // The getData method simply returns the node as an Object.
> public function getData(node:Object, model:Object=null):Object
> {
> try
> {
> return Object(node);
> }
> catch (e:Error)
> {
> }
> return null;
> }
>
> // The addChildAt method does the following:
> // If the node parameter is null or undefined, inserts
> // the child parameter as the first child of the model parameter.
> // If the node parameter is an Object and has a children field,
> // adds the child parameter to it at the index parameter location.
> // It does not add a child to a terminal node if it does not have
> // a children field.
> public function addChildAt(node:Object, child:Object, index:int,
model:Object=null):Boolean
> {
> var event:TreeModelChangedEvent = new
TreeModelChangedEvent("modelChanged", false, false,
TreeModelChangedEventDetail.ADD_NODE, child, node, index);
>
> if (!node)
> {
> var iterator:IViewCursor = model.createCursor();
> iterator.seek(CursorBookmark.FIRST, index);
> iterator.insert(child);
> }
> else if (node is Object)
> {
> if (node.children != null)
> {
> if(node.children is ArrayCollection) {
> node.children.addItemAt(child, index);
> if (model){
> model.dispatchEvent(event);
> model.itemUpdated(node);
> }
> return true;
> }
> else {
> node.children.splice(index, 0, child);
> if (model)
> model.dispatchEvent(event);
> return true;
> }
> }
> }
> return false;
> }
>
> }
> }
> The following example code uses the MyCustomTreeDataDescriptor to
handle hierarchal nested ArrayCollections and objects. When you click
the button it adds a node to the tree by calling the data descriptor's
addChildAt method.
>
> <?xml version="1.0" encoding="iso-8859-1"?>
> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml";
creationComplete="initCollections()">
>
> <mx:Script>
> <![CDATA[
> import mx.collections.*;
> import mx.controls.treeClasses.*;
>
> //Variables used to construct the ArrayCollection data
provider
> //First top-level node and its children.
> public var nestArray1:Object = [
> {label:"item1", children: [
> {label:"item1 child", children: [
> {label:"item 1 child child", data:"child data"}
> ]}
> ]}
> ];
> //Second top-level node and its children.
> public var nestArray2:Object = [
> {label:"item2", children: [
> {label:"item2 child", children: [
> {label:"item 2 child child", data:"child data"}
> ]}
> ]}
> ];
> //Second top-level node and its children.
> public var nestArray3:Object = [
> {label:"item3", children: [
> {label:"item3 child", children: [
> {label:"item 3 child child", data:"child data"}
> ]}
> ]}
> ];
> //Variable for the tree array.
> public var treeArray:Object
> //Variables for the three Array collections that
correspond to the
> //top-level nodes.
> public var col1:ArrayCollection;
> public var col2:ArrayCollection;
> public var col3:ArrayCollection;
> //Variable for the ArrayCollection used as the Tree data
provider.
> [Bindable]
> public var ac:ArrayCollection;
>
> //build the ac ArrayCollection from its parts.
> public function initCollections():void{
> // Wrap each top-level node in an ArrayCollection.
> col1 = new ArrayCollection(nestArray1);
> col2 = new ArrayCollection(nestArray2);
> col3 = new ArrayCollection(nestArray3);
> // Put the three top-level node ArrayCollections in
the treeArray.
> treeArray = [
> {label:"first thing", children: col1},
> {label:"second thing", children: col2},
> {label:"third thing", children: col3},
> ];
> //Wrap the treeArray in an ArrayCollection.
> ac = new ArrayCollection(treeArray);
> }
>
> // Adds a child node as the first child of the selected
node,
> // if any. The default selectedNode is null, which
causes the
> // data descriptor addChild method to add it as the
first child
> // of the ac ArrayCollection.
> public function clickAddChildren():void {
> var newChild:Object = new Object();
> newChild.label = "New Child";
> newChild.children = new ArrayCollection();
>
tree.treeDataDescriptor.addChildAt(tree.selectedNode, newChild, 0, ac);
> }
>
> ]]>
> </mx:Script>
>
> <mx:Tree width="200" id="tree" dataProvider="{ac}"
> treeDataDescriptor="{new MyCustomTreeDataDescriptor()}"/>
<------------ this is an error
> <mx:Button label="add children" click="clickAddChildren()"/>
> </mx:Application>
> ====================You can see that error message follow, if you
run above application.-> Severity Description Resource In Folder
Location Creation Time Id2 Cannot resolve attribute
'treeDataDescriptor' for component type mx.controls.Tree.
AppMyCustomTreeDataDescriptor.mxml ShinhanBank_Local line 76 2006³â
5¿ù 18ÀÏ (¸ñ) ¿ÀÈÄ 2:07:36 47I couldn't find the property of
treeDataDescriptor from the help.However, I found a property named
dataDescriptor for the component fo Tree.But, I couldn't see that
perform well even if use it.Please, help me. anybody no idea?
>
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