InfiniteListState<T extends JsonModel, TF extends DataFilter, TW extends StatefulWidget> class abstract

An abstract state class that provides infinite scroll list functionality.

This template class implements a complete infinite scroll list with:

• Pagination support using PagingController
• Search functionality with animated search bar
• Filter support with optional filter form
• Pull-to-refresh capability
• Error handling including 403 forbidden state
• Empty state display
• Loading indicators

Subclasses must implement:

• filter: The data filter instance
• title: The page title
• repository: The repository for fetching data
• itemRender: Method to render each list item
• onIndexChange: Handler for index changes

Usage:

class MyListPageState extends InfiniteListState<MyModel, MyFilter, MyListPage> {
  @override
  MyFilter filter = MyFilter();

  @override
  String get title => 'My List';

  @override
  BaseRepository<MyModel, MyFilter> get repository => myRepository;

  @override
  Widget itemRender(BuildContext context, MyModel item, int index) {
    return ListTile(title: Text(item.name));
  }

  @override
  void onIndexChange() {
    // Handle index change
  }
}