Modext modx.grid drag and drop re-ordering?

,enableDragDrop: true, // enable drag and drop of grid rows
            viewConfig: {
                emptyText: 'No items found',
                sm: new Ext.grid.RowSelectionModel({singleSelect:true}),
                forceFit: true,
                autoFill: true
            }
        ,ddGroup:'my-grid' */

,listeners: {

            "render": {
                scope: this,
                fn: function(grid) {

                    var ddrow = new Ext.dd.DropTarget(grid.getView().mainBody, {
                        ddGroup : 'mygrid-dd',
                        notifyDrop : function(dd, e, data){

                            var sm = grid.getSelectionModel();
                            var rows = sm.getSelections();
                            var cindex = dd.getDragData(e).rowIndex;
                            if (sm.hasSelection()) {
                                for (i = 0; i < rows.length; i++) {
                                    store.remove(store.getById(rows[i].id));
                                    store.insert(cindex,rows[i]);
                                }
                                sm.selectRecords(rows);
                            }
                        }
                    });

               }
           }
        }