Re: [flexcoders] How to get the number of rows in a Tree or TreeDataProvider

[Jeff Tapper]

Hows this for an alternative if you want the count, but dont want the tree 
to be opened. I've only tested this with small trees, I'd fear for its 
performance in larger trees:

function countClosed():Number{
var num:Number = openTree(nav);
closeTree(nav,num);
return num;
}
function openTree(t:mx.controls.Tree):Number {
var i:Number=0;
var node:mx.controls.treeclasses.TreeNode=t.getTreeNodeAt(i);
while (node != undefined){
if (t.getIsBranch(node) && ! t.getIsOpen(node)){
t.setIsOpen(node,true);
}
i++;
node=t.getNodeDisplayedAt(i);
}
return i;
}
function closeTree(t:mx.controls.Tree,numNodes:Number){
for(var i=0;i<numNodes;i++){
var node:mx.controls.treeclasses.TreeNode=t.getTreeNodeAt(i);
if (t.getIsBranch(node) && t.getIsOpen(node)){
t.setIsOpen(node,false);
}
}       
t.selectedIndex = null;
}