Collapsing a TreeView

Question

Dear friends,My script to expand all nodes works fine. The contrary function to collapse all nodes, does not behave:This is the starting point, the tree is generated an the top nodes are closedUsing button Expand makes the whole tree visibleAs long as the whole tree is visible, using Collapse works correctlyIf only part of the tree is visible and Collapse is used, nothing happens:→ What could be wrong with FunCollapseAll?function FunExpandAll(oTree) { // --- recursively used
// Reference    Peter Kahrel
var j, branches;
  oTree.expanded = true;
  branches = oTree.items;
  for (var j = 0; j < branches.length; j++) {
    if (branches[j].type == 'node') {
      FunExpandAll (branches[j]);
    }
  }
} // end of FunExpandAll

K.Daube · Accepted Answer

The following 'brute force' method works:// --- behaviour of the buttons  wDocNav.g1.btnExpand.onClick = function () {    FunExpandAll(oTree);  }  wDocNav.g1.btnCollapse.onClick = function () {    FunExpandAll(oTree); // to avoid error with partial view    FunCollapseAll(oTree);    wDocNav.show();  }

ReedError · Answer

I can't try this, but my guess is that you can't collapse a node if it's parent is already collapsed.

Is there a way you can work in the opposite direction for collapse?

Fold all of the lowest nodes first and work up the tree?

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