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

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