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

87 lines
1.9 KiB
Dart

import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';
import 'package:git_touch/scaffolds/common.dart';
import 'package:git_touch/scaffolds/utils.dart';
class RefreshStatefulScaffold<T> extends StatefulWidget {
final Widget title;
final Widget Function(T data, void Function(VoidCallback fn) setState)
bodyBuilder;
final Future<T> Function() fetchData;
final Widget Function(T data, void Function(VoidCallback fn) setState)
actionBuilder;
final canRefresh;
RefreshStatefulScaffold({
@required this.title,
@required this.bodyBuilder,
@required this.fetchData,
this.actionBuilder,
this.canRefresh = true,
});
@override
_RefreshStatefulScaffoldState<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.fetchData();
} catch (err) {
_error = err.toString();
throw err;
} finally {
if (mounted) {
setState(() {
_loading = false;
});
}
}
}
Widget get _action {
if (widget.actionBuilder == null || _data == null) return null;
return widget.actionBuilder(_data, setState);
}
@override
Widget build(BuildContext context) {
Widget child = ErrorLoadingWrapper(
bodyBuilder: () => widget.bodyBuilder(_data, setState),
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,
);
}
}