I encountered the same problem and wrote my own version.
public var categoryNodes:XML = new XML(); // xml data of the tree set
elsewhere
public var arrayFromNodes:ArrayCollection = new ArrayCollection();
public var nodeCount:Number = 0;
/**
* returns an xml node based on a tree index
*/
public function getNodeAt(index:Number):XML{
arrayFromNodes = new ArrayCollection();
nodeCount=0;
arrayFromNodes.addItem(categoryNodes[nodeCount]);
getNodeList(XMLList(categoryNodes));
return XML(arrayFromNodes.getItemAt(index));
}
/**
* returns a flattend node listing from an xml tree
*/
private function getNodeList(currentList:XMLList):void{
for each(var childIndex:XML in XMLList(currentList.children())){
nodeCount++
arrayFromNodes.addItem(childIndex);
if(XMLList(childIndex).children().length()){
getNodeList(XMLList(childIndex))
}
}
}
As to the expandChildrenOf() function it works for me by passing in
the root node for the tree dataProvider.
--- In [email protected], "carl_steinhilber"
<[EMAIL PROTECTED]> wrote:
>
> Well, now I'm stymied.
>
> With Flex 1.5, I was able to expand all the nodes of an mx:Tree with
> something like:
>
> function setOpenAll(aryNodes):Void{
>
> var childNode = aryNodes.getTreeNodeAt(0);
> var aryChildren = aryNodes.getChildNodes();
>
> for (var i = 0;i < aryChildren.length;i = i + 1){
> childNode = aryNodes.getTreeNodeAt(i);
> treeElem.setIsOpen( myNode, true, false, false);
> if ( childNode.hasChildNodes() ){
> setOpenAll(childNode );
> }
> }
> }
>
> and invoke it with a button function like
>
> click="setOpenAll(treeElem.dataProvider)"
>
>
> But this throws an error in Flex 2. Near as I can tell... there's no
> getTreeNodeAt() function anymore.
>
> Anyone know how to go about expanding all the nodes of a tree, now, in
> Flex 2? I'm continually surprised there are no methods
> openAll()/closeAll() for the Tree. Seems like the new
> expandChildrenOf() method would make things easier... but not quite
> sure how to use it.
>
> Thanks in advance,
> -Carl
>
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