onDrag event doesn't trigger

[taneltm]

onDragStart and onDragEnd events trigger just fine, but onDrag event doesn't.
That is because in the binding:

.bind('mousemove.splitter', function(e) {
  ...
  if (current_splitter.orientation == 'vertical') {
    ...
      current_splitter.find('.splitter_panel').trigger('splitter.resize');
      return false;
    ...
  }
  if (current_splitter.orientation == 'horizontal') {
    ...
      current_splitter.trigger('splitter.resize');
      return false;
    ...
  }
  settings.onDrag(e);
}

"return false;" is always called and "settings.onDrag(e);" is never reached.