136 lines
3.6 KiB
Dart
136 lines
3.6 KiB
Dart
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import 'package:flutter/material.dart';
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import 'package:flutter/cupertino.dart';
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import 'package:git_touch/models/theme.dart';
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import 'package:provider/provider.dart';
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import '../widgets/loading.dart';
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import '../widgets/error_reload.dart';
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class TabScaffold<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(int activeTab) onRefresh;
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final Widget Function(T payload) trailingBuilder;
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final List<String> tabs;
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TabScaffold({
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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.trailingBuilder,
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this.tabs,
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});
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@override
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_TabScaffoldState createState() => _TabScaffoldState();
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}
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class _TabScaffoldState<T> extends State<TabScaffold<T>> {
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bool _loading;
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T _payload;
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String _error = '';
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int _activeTab = 0;
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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, onTap: _refresh);
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} else if (_payload == null) {
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return Loading(more: false);
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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([int activeTab]) 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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if (activeTab != null) {
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_activeTab = activeTab;
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}
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});
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_payload = await widget.onRefresh(activeTab);
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} catch (err) {
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_error = err.toString();
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throw err;
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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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Widget _buildTrailing() {
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if (_payload == null || widget.trailingBuilder == null) return null;
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return widget.trailingBuilder(_payload);
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}
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List<Widget> _buildActions() {
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if (_payload == null || widget.trailingBuilder == null) return null;
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var w = widget.trailingBuilder(_payload);
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return [if (w != null) w];
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}
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@override
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Widget build(BuildContext context) {
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switch (Provider.of<ThemeModel>(context).theme) {
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case AppThemeType.cupertino:
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return CupertinoPageScaffold(
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navigationBar: CupertinoNavigationBar(
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middle: DefaultTextStyle(
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style: TextStyle(),
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child: CupertinoSegmentedControl(
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groupValue: _activeTab,
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onValueChanged: _refresh,
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children: widget.tabs.asMap().map((key, text) => MapEntry(
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key,
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Padding(
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padding: const EdgeInsets.symmetric(horizontal: 4),
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child: Text(text),
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))),
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),
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),
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trailing: null, // TODO:
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),
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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 DefaultTabController(
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length: widget.tabs.length,
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child: Scaffold(
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appBar: AppBar(
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title: widget.title,
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actions: _buildActions(),
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bottom: TabBar(
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onTap: _refresh,
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tabs: widget.tabs
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.map((text) => Tab(text: text.toUpperCase()))
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.toList(),
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),
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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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}
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