A full reorderable grid implemention similar to Flutters Reorderable_List. with full ReorderableGridView, ReorderableGrid and SliverReorderableGrid implementations
ReorderableGridView is a drop in replacement for the existing GridView and adds an onReorder callback that provides the original and new index of the reordered item.
/// create a new list of data
final items = List<int>.generate(40, (index) => index);
/// when the reorder completes remove the list entry from its old position
/// and insert it at its new index
void _onReorder(int oldIndex, int newIndex) {
setState(() {
final item = items.removeAt(oldIndex);
items.insert(newIndex, item);
});
}
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: ReorderableGridView.extent(
maxCrossAxisExtent: 250,
onReorder: _onReorder,
childAspectRatio: 1,
children: items.map((item) {
/// map every list entry to a widget and assure every child has a
/// unique key
return Card(
key: ValueKey(item),
child: Center(
child: Text(item.toString()),
),
);
}).toList(),
),
),
);
}ReorderableGrid provides all the constructors and parameters the normal GridView has. The package also includes:
ReorderableGridView, which is a prebuild Material-ish implementation of the grid.ReorderableGrid, A barebones widget that allows you to customize the grid however you wantSliverReorderableGrid, a reorderable grid sliver for custom scroll implementations
If this package is useful to you please 👍 on pub.dev and ⭐ on github. If you have any Issues, recommendations or pull requests I'd love to see them!