extjs treepanel: expand() & expandChildNodes()

Question

If I write:

rootNode.expand()

I can only get access to the children nodes of this rootNode, but can't get access to the grandchildren nodes of this rootNode. I have to write:

rootNode.expandChildNodes()

in order to acheive it.

Is there another way to obtain the grandchildren or further children nodes even if the tree is collapsed? other than using node.eachChild() function? I tried:

rootChildNode.firstChild

but it doesn't work.

Solution 1

ExtJS 4x has expandAll() method on the Tree Panel component. This will expand every node recursively.

Solution 2

if you want to expand to a partcular level then in that case:

           expandTo:function(level){

                    treePanel.collapseAll();
                    treePanel.getRootNode().cascadeBy(function (node) {

                          if (node.getDepth() < level) { node.expand(); }
                          if (node.getDepth() == level) { return false; }
                     });
         }