[flexcoders] TREE : extending the tree component

Wed, 22 Jun 2005 04:04:55 -0700

Hi everybody!
 
I need your help to cuztomize the Tree component...
I aim at expanding all nodes of my cuztomized tree when initializing it.
 
I created a CuztomizedTree class as following :
------------------------------------------------------------------------------------------------------------------------
import mx.controls.Tree;
import mx.controls.treeclasses.TreeNode;
import mx.controls.Alert;
 
class com.as.components.CustomizedTree extends Tree
{ 
 
function CustomizedTree()
 {
 }
 
 function setIsOpen( node, open, animate, fireEvent):Void
 {
    // actions dedicated to the SetIsOpen method
}
 
 public function expandTree()
 {
  var selectedNode:TreeNode=this.selectedNode;
  if (selectedNode && this.selectedIndex != 0)
  {
   var node:TreeNode=this.getNodeDisplayedAt(this.selectedIndex);
   this.setIsOpen(node,true); 
   setAdaptedIcon(this, selectedNode, selectedNode.attributes.operand);
  } else {
   var i:Number=0;
   var node:TreeNode=this.getTreeNodeAt(i);

   Alert.show("node.selectedIndex : " + node.attributes.label, "______Message__", Alert.OK);
    // this message generates the following message
    //
    // Error /WEB-INF/flex/user_classes/com/as/components/CustomizedTree.as:100
    // There is no property with the name 'selectedIndex'.
    //
    // Error
    // Unable to create ActionScript Component for com.as.components.CustomizedTree: Could not compile 'synthetic: Object.registerClass() for com.as.components.CustomizedTree'

   while (node != undefined)
   {
    if (this.getIsBranch(node) && ! this.getIsOpen(node))
    {
     this.setIsOpen(node,true);
    }
    setAdaptedIcon(this, node, node.attributes.operand);
    i++;
    node=this.getNodeDisplayedAt(i);
   }
  }
 }
---------------------------------------------------------------------------------------------------------------------------------
In my Tree.mxml file, I call this method in an initAppli method
 
 public function initTree()
 {
  tree.expandTree(); // tree is the name of my CuztomizedTree object
 }
------------------------------------------------------------------------------------------------------------------------------------
Any suggestions?
Thank a lot!
 
PS: Thanksfull thoughts to Gordon Smith, Tracy Spratt and Matt Chottin for their suggestions concerning the treenode adding and the tree collapsing!

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