Combotree - how to prevent selection of group headings

[Quarkrunner]

I can't work out how to prevent users from selecting the group headings within a combotree. We want them to display so that they can be opened to reveal the children, but we need to prevent selection of the group headings themselves. Please advise.

[stworthy]

The 'onBeforeSelect' event can be used to determine what nodes can be selected.

Code:

$('#cc').combotree({
  onBeforeSelect:function(node){
    if (...){return false)  // return false to prevent from selecting a node.
  }
});

[Quarkrunner]

Many thanks.

As a follow up, if instead we wanted to treat clicking the group heading the same as clicking the arrow (ie. opening and closing the group), how would that be done?