expandable_reorderable_list

Description:

expandable reorderable list

Expandable Reorderable List #
A wrapper around
ReorderableListView
that allows you to:

Display a tree of items.
Expand and collapse them.
Reorder them.

Checkout our example:

Example #
This example, inspired by the ReorderableListView documentation,
creates a list using ExpandableReorderableList:
class MyList extends StatefulWidget {
const MyList({Key? key}) : super(key: key);

@override
_MyListState createState() => _MyListState();
}

class _MyListState extends State<HomeTest> {
final List<int> _items = List<int>.generate(50, (index) => index);

@override
Widget build(BuildContext context) {
final colorScheme = Theme.of(context).colorScheme;
final oddItemColor = colorScheme.primary.withOpacity(0.05);
final evenItemColor = colorScheme.primary.withOpacity(0.15);
return ExpandableReorderableList<ValueKey<int>>(
onReorder: (onReorderParam) {
setState(() {
var newIndex = onReorderParam.newIndex;
if (onReorderParam.oldIndex < onReorderParam.newIndex) {
newIndex -= 1;
}
final int item = _items.removeAt(onReorderParam.oldIndex);
_items.insert(newIndex, item);
});
},
children: _items.map((int item) {
return ExpandableReorderableListItem<ValueKey<int>>(
key: ValueKey<int>(item),
builder: (_, child, model) {
return ReorderableDragStartListener(
index: model.index!,
child: ListTile(
title: Text('Item $item'),
tileColor: item.isOdd ? oddItemColor : evenItemColor,
),
);
},
);
}).toList(),
);
}
}
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