101 lines
2.4 KiB
Dart
101 lines
2.4 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:flutter/cupertino.dart';
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import 'package:flutter/widgets.dart';
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import '../providers/settings.dart';
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import '../widgets/loading.dart';
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import '../widgets/error_reload.dart';
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import '../utils/utils.dart';
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// This is a scaffold for pull to refresh
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class RefreshScaffold<T> extends StatefulWidget {
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final Widget title;
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final Widget Function(T payload) bodyBuilder;
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final Future<T> Function() onRefresh;
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final Widget trailing;
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final List<Widget> actions;
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final PreferredSizeWidget bottom;
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RefreshScaffold({
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@required this.title,
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@required this.bodyBuilder,
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@required this.onRefresh,
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this.trailing,
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this.actions,
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this.bottom,
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});
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@override
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_RefreshScaffoldState createState() => _RefreshScaffoldState();
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}
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class _RefreshScaffoldState<T> extends State<RefreshScaffold<T>> {
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bool loading;
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T payload;
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String error = '';
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@override
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void initState() {
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super.initState();
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_refresh();
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}
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Widget _buildBody() {
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if (error.isNotEmpty) {
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return ErrorReload(text: error, reload: _refresh);
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} else if (loading) {
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return Loading(more: true);
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} else {
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return widget.bodyBuilder(payload);
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}
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}
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Future<void> _refresh() async {
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try {
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setState(() {
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error = '';
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loading = true;
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});
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payload = await widget.onRefresh();
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} catch (err) {
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error = err.toString();
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} finally {
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if (mounted) {
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setState(() {
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loading = false;
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});
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}
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}
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}
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@override
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Widget build(BuildContext context) {
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switch (SettingsProvider.of(context).theme) {
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case ThemeMap.cupertino:
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return CupertinoPageScaffold(
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navigationBar: CupertinoNavigationBar(
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middle: widget.title, trailing: widget.trailing),
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child: SafeArea(
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child: CustomScrollView(
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slivers: <Widget>[
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CupertinoSliverRefreshControl(onRefresh: _refresh),
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SliverToBoxAdapter(child: _buildBody())
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],
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),
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),
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);
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default:
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return Scaffold(
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appBar: AppBar(
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title: widget.title,
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actions: widget.actions,
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bottom: widget.bottom,
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),
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body: RefreshIndicator(
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onRefresh: _refresh,
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child: SingleChildScrollView(child: _buildBody()),
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),
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);
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}
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}
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}
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