git-touch-android-ios-app/lib/scaffolds/refresh_stateful.dart

96 lines
2.2 KiB
Dart

import 'package:flutter/cupertino.dart';
import 'package:flutter/widgets.dart';
import 'package:git_touch/scaffolds/common.dart';
import 'package:git_touch/scaffolds/utils.dart';
class RefreshStatefulScaffold<T> extends StatefulWidget {
const RefreshStatefulScaffold({
required this.title,
required this.bodyBuilder,
required this.fetch,
this.actionBuilder,
this.action,
this.canRefresh = true,
}) : assert(actionBuilder == null || action == null);
final Widget title;
final Widget? Function(T data, void Function(T newData) setData) bodyBuilder;
final Future<T> Function() fetch;
final Widget? Function(T data, void Function(T newData) setData)?
actionBuilder;
final Widget? action;
final bool canRefresh;
@override
State<RefreshStatefulScaffold<T>> createState() =>
_RefreshStatefulScaffoldState();
}
class _RefreshStatefulScaffoldState<T>
extends State<RefreshStatefulScaffold<T>> {
// bool _loading;
T? _data;
String _error = '';
@override
void initState() {
super.initState();
_refresh();
setState(() {});
}
Future<void> _refresh() async {
try {
setState(() {
_error = '';
// _loading = true;
});
_data = await widget.fetch();
} catch (err) {
_error = err.toString();
rethrow;
} finally {
if (mounted) {
setState(() {
// _loading = false;
});
}
}
}
Widget? get _action {
if (widget.action != null) return widget.action;
if (widget.actionBuilder == null || _data == null) return null;
return widget.actionBuilder!(_data as T, (v) {
setState(() {
_data = v;
});
});
}
@override
Widget build(BuildContext context) {
Widget child = ErrorLoadingWrapper(
bodyBuilder: () => widget.bodyBuilder(_data as T, (v) {
setState(() {
_data = v;
});
}),
error: _error,
loading: _data == null,
reload: _refresh,
);
if (widget.canRefresh) {
child = RefreshWrapper(
onRefresh: _refresh,
body: child,
);
}
return CommonScaffold(
title: widget.title,
body: child,
action: _action,
);
}
}