When drag and drop is enabled in a datagrid, how can you manipulate
$(sourceRow).draggable('proxy').removeClass('tree-dnd-yes').addClass('tree-dnd-no');
and
$(sourceRow).draggable('proxy').removeClass('tree-dnd-no').addClass('tree-dnd-yes');
in the datagrid events? (onDragEnter, onDragOver,OnBeforeDrop etc.)
For example, I have a datagrid with grouped rows. While it is not permitted to drop rows to a different group by default, the tick icon is still show rather than the red cross icon when dragging over targetRows in a different group.