Tree drag&drop (disable children)

[Szoron]

Given a list of what component tree is displayed.
I want to sort the contents of the list with drag & drop.
It would be just sort order.
However, I would not like nesting (children)
How can this be disabled?
before

after

wrong after

[stworthy]

Returning false in the 'onBeforeDrop' event will abort the dropping action. The code below shows how to disable the dnd on different levels.

Code:

$('#tt').tree({
  onBeforeDrop:function(target,source,point){
    if (point=='append'){
      return false;
    }
    var p1 = $(this).tree('getParent', target);
    var p2 = $(this).tree('getParent', source.target);
    p1 = p1==null ? null : p1.target;
    p2 = p2==null ? null : p2.target;
    if (p1 != p2){
      return false;
    }
  }
})

[Szoron]

perfect!

thank you!