Selection of first node of a tree is not happening with xtype treecolumn

Question

I have created a tree panel by specifying the xtype as treecolumn. I want to select the first leaf of the tree. In this example I have registered the boxready event detailed below:

boxready : function( treePanel, width, height, eOpts ){

    treePanel.getSelectionModel().select( 0 );
    //treePanel.select( treePanel.getRootNode().getChildAt(0) );
    treePanel.getSelectionModel().selected = 0;
},
treePanel.getSelectionModel()

This example is giving me selectionmodel of type SINGLE. Can anyone explain why my example does not select the first leaf?

Answer 1

This is a little "diagram":

If you need the leaf from beginning with:

• one node selected:

  var nodeData = treePanel.getSelectionModel().getSelection();

• from the begin:

  var node = treePanel.getRootNode(); -- father ( first Node );

  findLeaf : function(node){

  if(node.isLeaf()){
  // this is the node that u want
  }else{
      // bucle to find it
      node.eachChild(function(nodeChild,array){
          if(nodeChild.isLeaf()){
             // this is the node that u want
          }else{
             // get childs of this node
             if(nodeChild.hasChildNodes()){
                  //find the childs from this node.
                  this.findLeaf(nodeChild);
             }
          }
      });
  }
  

  };