Limiting tree depth

[al...@alexhoward.com.au]

Is there a straightforward or canonical method for limiting tree depth when using the DND extension?

[al...@alexhoward.com.au]

Well, in the end, I only wanted to allow my users to have two levels so I did this.

dragDrop: function(node, data) {
if (data.node.parent.parent == null) {
data.otherNode.moveTo(node, data.hitMode);
}
else {
//it wont add, send a message to the user
}
}

This works for me.

[mar10]

You can also restrict the list of allowed hit modes to prevent creating a child:

dragEnter: function (node, data) {
  if  (node.getLevel() > 1 ) {
    // Don't allow dropping *over* a node (would create a child). Just
    // allow changing the order:
    return ["before", "after"];
  }
  // Accept everything:
  return true;
},

See also https://github.com/mar10/fancytree/wiki/ExtDnd5