Rows in any treegrid can be dragged and dropped to other treegrids and vice versa.
This is done by:
dropModel.accept play crucial role in creating draggable / droppable relation between grids.
dragModel.isDraggable is implemented to exclude summary rows and root nodes.
dropModel.isDroppable is implemented to exclude summary rows, ancestor rows of dropped rows and if dragged and dropped over rows are same.
dropModel.drop removes the rows from old treegrid and add them to new treegrid. You can override it to do custom action upon drop of rows.
First of all mutiple row selection is turned on or checkbox selection is turned on.
dragModel.dragNodes method is implemented as in this example to return array of selected or checked rows.