Widget _myGrid(){ return DragAndDropGridView( onWillAccept: (oldInd, newInd)=> true, onReorder: (oldInd, newInd){ changeListOrder( oldInd: oldInd, newInd: newInd, list: _indexes ); }, itemCount: ITEM_COUNT, gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount( crossAxisCount: 2, crossAxisSpacing: CARD_SPACE, mainAxisSpacing: 24, ), itemBuilder: (context, index)=> _itemBuilder(index), ); }