add stream_chat_v1 example
This commit is contained in:
Salvatore Giordano
@@ -0,0 +1,339 @@
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import 'dart:async';
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import 'package:flutter/material.dart';
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import 'package:stream_chat_flutter/stream_chat_flutter.dart';
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import 'routes/routes.dart';
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import 'search_text_field.dart';
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class NewGroupChatScreen extends StatefulWidget {
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@override
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_NewGroupChatScreenState createState() => _NewGroupChatScreenState();
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}
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class _NewGroupChatScreenState extends State<NewGroupChatScreen> {
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TextEditingController _controller;
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String _userNameQuery = '';
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final _selectedUsers = <User>{};
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bool _isSearchActive = false;
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Timer _debounce;
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void _userNameListener() {
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if (_debounce?.isActive ?? false) _debounce.cancel();
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_debounce = Timer(const Duration(milliseconds: 350), () {
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if (mounted) {
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setState(() {
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_userNameQuery = _controller.text;
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_isSearchActive = _userNameQuery.isNotEmpty;
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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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void initState() {
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super.initState();
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_controller = TextEditingController()..addListener(_userNameListener);
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}
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@override
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void dispose() {
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_controller?.clear();
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_controller?.removeListener(_userNameListener);
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_controller?.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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backgroundColor: StreamChatTheme.of(context).colorTheme.whiteSnow,
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appBar: AppBar(
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elevation: 1,
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backgroundColor: StreamChatTheme.of(context).colorTheme.white,
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leading: const StreamBackButton(),
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title: Text(
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'Add Group Members',
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style: TextStyle(
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color: StreamChatTheme.of(context).colorTheme.black,
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fontSize: 16,
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),
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),
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centerTitle: true,
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actions: [
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if (_selectedUsers.isNotEmpty)
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IconButton(
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icon: StreamSvgIcon.arrow_right(
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color: StreamChatTheme.of(context).colorTheme.accentBlue,
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),
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onPressed: () async {
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final updatedList = await Navigator.pushNamed(
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context,
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Routes.NEW_GROUP_CHAT_DETAILS,
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arguments: _selectedUsers.toList(growable: false),
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);
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if (updatedList != null) {
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setState(() {
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_selectedUsers
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..clear()
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..addAll(updatedList);
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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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body: ConnectionStatusBuilder(
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statusBuilder: (context, status) {
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String statusString = '';
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bool showStatus = true;
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switch (status) {
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case ConnectionStatus.connected:
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statusString = 'Connected';
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showStatus = false;
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break;
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case ConnectionStatus.connecting:
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statusString = 'Reconnecting...';
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break;
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case ConnectionStatus.disconnected:
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statusString = 'Disconnected';
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break;
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}
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return InfoTile(
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showMessage: showStatus,
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tileAnchor: Alignment.topCenter,
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childAnchor: Alignment.topCenter,
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message: statusString,
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child: NestedScrollView(
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floatHeaderSlivers: true,
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headerSliverBuilder:
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(BuildContext context, bool innerBoxIsScrolled) {
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return <Widget>[
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SliverToBoxAdapter(
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child: SearchTextField(
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controller: _controller,
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),
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),
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if (_selectedUsers.isNotEmpty)
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SliverToBoxAdapter(
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child: Container(
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height: 104,
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child: ListView.separated(
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scrollDirection: Axis.horizontal,
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itemCount: _selectedUsers.length,
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padding: const EdgeInsets.all(8),
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separatorBuilder: (_, __) => SizedBox(width: 16),
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itemBuilder: (_, index) {
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final user = _selectedUsers.elementAt(index);
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return Column(
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children: [
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Stack(
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children: [
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UserAvatar(
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onlineIndicatorAlignment:
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Alignment(0.9, 0.9),
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user: user,
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showOnlineStatus: true,
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borderRadius: BorderRadius.circular(32),
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constraints: BoxConstraints.tightFor(
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height: 64,
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width: 64,
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),
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),
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Positioned(
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top: -4,
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right: -4,
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child: GestureDetector(
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onTap: () {
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if (_selectedUsers.contains(user)) {
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setState(() =>
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_selectedUsers.remove(user));
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}
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},
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child: Container(
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decoration: BoxDecoration(
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color: StreamChatTheme.of(context)
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.colorTheme
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.white,
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shape: BoxShape.circle,
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border: Border.all(
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color: StreamChatTheme.of(context)
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.colorTheme
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.whiteSnow,
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),
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),
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child: StreamSvgIcon.close(
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color: StreamChatTheme.of(context)
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.colorTheme
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.black,
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size: 24,
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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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SizedBox(height: 4),
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Text(
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user.name.split(' ')[0],
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style: TextStyle(
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fontWeight: FontWeight.bold,
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fontSize: 12,
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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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),
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),
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SliverPersistentHeader(
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pinned: true,
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delegate: _HeaderDelegate(
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height: 30,
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child: Container(
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width: double.maxFinite,
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decoration: BoxDecoration(
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gradient:
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StreamChatTheme.of(context).colorTheme.bgGradient,
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),
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child: Padding(
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padding: const EdgeInsets.symmetric(
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vertical: 8,
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horizontal: 8,
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),
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child: Text(
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_isSearchActive
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? 'Matches for \"$_userNameQuery\"'
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: 'On the platform',
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style: TextStyle(
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color:
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StreamChatTheme.of(context).colorTheme.grey,
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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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];
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},
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body: GestureDetector(
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behavior: HitTestBehavior.opaque,
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onPanDown: (_) => FocusScope.of(context).unfocus(),
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child: UsersBloc(
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child: UserListView(
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selectedUsers: _selectedUsers,
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pullToRefresh: false,
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groupAlphabetically: _isSearchActive ? false : true,
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onUserTap: (user, _) {
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if (!_selectedUsers.contains(user)) {
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setState(() {
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_selectedUsers.add(user);
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});
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} else {
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setState(() {
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_selectedUsers.remove(user);
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});
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}
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},
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pagination: PaginationParams(
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limit: 25,
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),
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filter: {
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if (_userNameQuery.isNotEmpty)
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'name': {
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r'$autocomplete': _userNameQuery,
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},
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'id': {
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r'$ne': StreamChat.of(context).user.id,
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}
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},
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sort: [
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SortOption(
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'name',
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direction: 1,
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),
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],
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emptyBuilder: (_) {
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return LayoutBuilder(
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builder: (context, viewportConstraints) {
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return SingleChildScrollView(
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physics: AlwaysScrollableScrollPhysics(),
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child: ConstrainedBox(
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constraints: BoxConstraints(
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minHeight: viewportConstraints.maxHeight,
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),
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child: Center(
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child: Column(
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children: [
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Padding(
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padding: const EdgeInsets.all(24),
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child: StreamSvgIcon.search(
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size: 96,
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color: StreamChatTheme.of(context)
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.colorTheme
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.grey,
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),
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),
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Text(
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'No user matches these keywords...',
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style: StreamChatTheme.of(context)
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.textTheme
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.footnote
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.copyWith(
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color: StreamChatTheme.of(context)
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.colorTheme
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.grey,
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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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);
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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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),
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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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class _HeaderDelegate extends SliverPersistentHeaderDelegate {
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final Widget child;
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final double height;
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const _HeaderDelegate({
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@required this.child,
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@required this.height,
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});
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@override
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Widget build(
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BuildContext context, double shrinkOffset, bool overlapsContent) {
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return Container(
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color: StreamChatTheme.of(context).colorTheme.white,
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child: child,
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);
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}
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@override
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double get maxExtent => height;
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@override
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double get minExtent => height;
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@override
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bool shouldRebuild(_HeaderDelegate oldDelegate) => true;
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}
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