Item Renderers for Trees

Question

Does anyone know what the function in the example below do?
I've been doing flash 7 and 8 for 2 yrs and am trying to convert
everything over to flex 2.0. I added the class below to an
itemRenderer for a tree but can't figure out what the function do.
I need to create 4 labels for a row and etc.... Please help
public class TreeCellRenderer extends TreeItemRenderer {
public function TreeCellRenderer () {
super();
// Override the set method for the data property
// to set the font color and style of each node.
override public function set data(value:Object):void {
super.data = value;
/*if (TreeListData(super.listData) != null) {
if(TreeListData(super.listData).hasChildren) {
setStyle("color", 0xff0000);
setStyle("fontWeight", 'bold');
else {
setStyle("color", 0x000000);
setStyle("fontWeight", 'normal');
// Override the updateDisplayList() method
// to set the text for each tree node.
override protected function
updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void
super.updateDisplayList(unscaledWidth, unscaledHeight);
/*if(super.data) {
if (TreeListData(super.listData)){
// Is this current node a folder?
if(TreeListData(super.listData).hasChildren) {
* remember just because this renderer is used for a node
call bob this time
* doesnt mean it will be used for the node bob the next time
you expand or
* collpase the parent tree node.
* There are other ways around this but for this simple
example I just wanted
* to show how to add things
// if there is no button in this renderer add one
/* if (btn_refresh == null){
btn_refresh = new TreeRefreshButton();
btn_refresh.x = this.width-btn_refresh.width;
addChild(btn_refresh);
// set the current node inside the refresh button
btn_refresh.Node = TreeListData(super.listData);
// Ok its not a folder so remove that button
}else{
if (btn_refresh != null)
this.removeChild(btn_refresh);
}

Answer 1

Yes, they are kinda tough. I claim no expertise, but have
managed to get them working by using the examples of others.
Does that exaple not work for you? Here is another:
http://www.cflex.net/showfiledetails.cfm?ChannelID=1&Object=File&objectID=575
For general info on the construction, and the overridden set
data() and updateDisplayList() methods, you will just need to study
the documentation.
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