[NewGroupChatScreen] Float selected users and searchField when list is scrolling.

This commit is contained in:
xsahil03x
2020-11-24 21:46:31 +05:30
parent 2ee8b72a31
commit fbc279f9dd
+273 -225
View File
@@ -24,11 +24,12 @@ class _NewGroupChatScreenState extends State<NewGroupChatScreen> {
void _userNameListener() { void _userNameListener() {
if (_debounce?.isActive ?? false) _debounce.cancel(); if (_debounce?.isActive ?? false) _debounce.cancel();
_debounce = Timer(const Duration(milliseconds: 350), () { _debounce = Timer(const Duration(milliseconds: 350), () {
if (mounted) if (mounted) {
setState(() { setState(() {
_userNameQuery = _controller.text; _userNameQuery = _controller.text;
_isSearchActive = _userNameQuery.isNotEmpty; _isSearchActive = _userNameQuery.isNotEmpty;
}); });
}
}); });
} }
@@ -46,247 +47,294 @@ class _NewGroupChatScreenState extends State<NewGroupChatScreen> {
super.dispose(); super.dispose();
} }
@override
Widget build(BuildContext context) { Widget build(BuildContext context) {
return Scaffold( return SafeArea(
backgroundColor: Color.fromRGBO(252, 252, 252, 1), child: UsersBloc(
appBar: AppBar( child: Scaffold(
elevation: 1, body: NestedScrollView(
backgroundColor: Colors.white, floatHeaderSlivers: true,
leading: const StreamBackButton(), headerSliverBuilder:
title: Text( (BuildContext context, bool innerBoxIsScrolled) {
'Add Group Members', return <Widget>[
style: TextStyle( SliverAppBar(
color: Colors.black, // floating: true,
fontSize: 16, pinned: true,
), forceElevated: true,
), elevation: 1,
centerTitle: true, backgroundColor: Colors.white,
actions: [ leading: const StreamBackButton(),
if (_selectedUsers.isNotEmpty) title: Text(
IconButton( 'Add Group Members',
icon: Icon( style: TextStyle(
StreamIcons.arrow_right, color: Colors.black,
color: Color(0xFF006CFF), fontSize: 16,
),
onPressed: () async {
final updatedList = await Navigator.push(
context,
MaterialPageRoute(
builder: (_) => GroupChatDetailsScreen(
selectedUsers: _selectedUsers.toList(growable: false),
), ),
), ),
); centerTitle: true,
if (updatedList != null) { actions: [
if (_selectedUsers.isNotEmpty)
IconButton(
icon: Icon(
StreamIcons.arrow_right,
color: Color(0xFF006CFF),
),
onPressed: () async {
final updatedList = await Navigator.push(
context,
MaterialPageRoute(
builder: (_) => GroupChatDetailsScreen(
selectedUsers:
_selectedUsers.toList(growable: false),
),
),
);
if (updatedList != null) {
setState(() {
_selectedUsers
..clear()
..addAll(updatedList);
});
}
},
)
],
),
SliverToBoxAdapter(
child: Container(
height: 36,
decoration: BoxDecoration(
color: Colors.white,
border: Border.all(
color: Colors.grey.shade300,
),
borderRadius: BorderRadius.circular(24),
),
margin: const EdgeInsets.symmetric(
vertical: 8,
horizontal: 8,
),
child: TextField(
controller: _controller,
decoration: InputDecoration(
prefixIcon: Icon(
StreamIcons.search,
color: Colors.black,
size: 24,
),
hintText: 'Search',
hintStyle: TextStyle(
color: Colors.black.withOpacity(0.5),
fontSize: 14,
),
contentPadding: const EdgeInsets.all(0),
border: OutlineInputBorder(
borderSide: BorderSide.none,
borderRadius: BorderRadius.circular(24),
),
),
),
),
),
if (_selectedUsers.isNotEmpty)
SliverToBoxAdapter(
child: Container(
height: 104,
child: ListView.separated(
scrollDirection: Axis.horizontal,
itemCount: _selectedUsers.length,
padding: const EdgeInsets.all(8),
separatorBuilder: (_, __) => SizedBox(width: 16),
itemBuilder: (_, index) {
final user = _selectedUsers.elementAt(index);
return Column(
children: [
Stack(
children: [
UserAvatar(
onlineIndicatorAlignment:
Alignment(0.9, 0.9),
user: user,
showOnlineStatus: true,
borderRadius: BorderRadius.circular(32),
constraints: BoxConstraints.tightFor(
height: 64,
width: 64,
),
),
Positioned(
top: -4,
right: -4,
child: GestureDetector(
onTap: () {
if (_selectedUsers.contains(user)) {
setState(() =>
_selectedUsers.remove(user));
}
},
child: Container(
decoration: BoxDecoration(
color: Colors.white,
shape: BoxShape.circle,
border: Border.all(
color: Colors.grey.shade100,
),
),
child: Padding(
padding: const EdgeInsets.all(0.0),
child: Icon(
StreamIcons.close,
size: 24,
),
),
),
),
)
],
),
SizedBox(height: 4),
Text(
user.name.split(' ')[0],
style: TextStyle(
fontWeight: FontWeight.bold,
fontSize: 12,
),
),
],
);
},
),
),
),
SliverPersistentHeader(
pinned: true,
delegate: _HeaderDelegate(
height: 30,
child: Container(
width: double.maxFinite,
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.centerLeft,
end: Alignment.centerRight,
colors: [
Colors.black.withOpacity(0.02),
Colors.white.withOpacity(0.05),
],
stops: [0, 1],
),
),
child: Padding(
padding: const EdgeInsets.symmetric(
vertical: 8,
horizontal: 8,
),
child: Text(
_isSearchActive
? 'Matches for \"$_userNameQuery\"'
: 'On the platform',
style: TextStyle(
color: Colors.black.withOpacity(0.5),
),
),
),
),
),
),
];
},
body: UserListView(
selectedUsers: _selectedUsers,
pullToRefresh: false,
groupAlphabetically: _isSearchActive ? false : true,
onUserTap: (user, _) {
if (!_selectedUsers.contains(user)) {
setState(() { setState(() {
_selectedUsers _selectedUsers.add(user);
..clear() });
..addAll(updatedList); } else {
setState(() {
_selectedUsers.remove(user);
}); });
} }
}, },
) pagination: PaginationParams(
], limit: 25,
), ),
body: UsersBloc( filter: {
child: Column( if (_userNameQuery.isNotEmpty)
children: [ 'name': {
Container( r'$autocomplete': _userNameQuery,
height: 36, },
decoration: BoxDecoration( 'id': {
color: Colors.white, r'$ne': StreamChat.of(context).user.id,
border: Border.all( }
color: Colors.grey.shade300, },
sort: [
SortOption(
'name',
direction: 1,
), ),
borderRadius: BorderRadius.circular(24), ],
), emptyBuilder: (_) {
margin: const EdgeInsets.symmetric( return LayoutBuilder(
vertical: 8, builder: (context, viewportConstraints) {
horizontal: 8, return SingleChildScrollView(
), physics: AlwaysScrollableScrollPhysics(),
child: TextField( child: ConstrainedBox(
controller: _controller, constraints: BoxConstraints(
decoration: InputDecoration( minHeight: viewportConstraints.maxHeight,
prefixIcon: Icon( ),
StreamIcons.search, child: Center(
color: Colors.black, child: Column(
size: 24, children: [
), Padding(
hintText: 'Search', padding: const EdgeInsets.all(24),
hintStyle: TextStyle( child: Icon(
color: Colors.black.withOpacity(0.5), StreamIcons.search,
fontSize: 14, size: 96,
), color: Colors.grey,
contentPadding: const EdgeInsets.all(0),
border: OutlineInputBorder(
borderSide: BorderSide.none,
borderRadius: BorderRadius.circular(24),
),
),
),
),
if (_selectedUsers.isNotEmpty)
Container(
height: 104,
child: ListView.separated(
scrollDirection: Axis.horizontal,
itemCount: _selectedUsers.length,
padding: const EdgeInsets.all(8),
separatorBuilder: (_, __) => SizedBox(width: 16),
itemBuilder: (_, index) {
final user = _selectedUsers.elementAt(index);
return Column(
children: [
Stack(
children: [
UserAvatar(
onlineIndicatorAlignment: Alignment(0.9, 0.9),
user: user,
showOnlineStatus: true,
borderRadius: BorderRadius.circular(32),
constraints: BoxConstraints.tightFor(
height: 64,
width: 64,
),
),
Positioned(
top: -4,
right: -4,
child: GestureDetector(
onTap: () {
if (_selectedUsers.contains(user)) {
setState(() => _selectedUsers.remove(user));
}
},
child: Container(
decoration: BoxDecoration(
color: Colors.white,
shape: BoxShape.circle,
border: Border.all(
color: Colors.grey.shade100,
),
),
child: Padding(
padding: const EdgeInsets.all(0.0),
child: Icon(
StreamIcons.close,
size: 24,
),
),
), ),
), ),
) Text('No user matches these keywords...'),
], ],
),
SizedBox(height: 4),
Text(
user.name.split(' ')[0],
style: TextStyle(
fontWeight: FontWeight.bold,
fontSize: 12,
), ),
), ),
], ),
); );
}, },
), );
), },
Container(
width: double.maxFinite,
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.centerLeft,
end: Alignment.centerRight,
colors: [
Colors.black.withOpacity(0.02),
Colors.white.withOpacity(0.05),
],
stops: [0, 1],
),
),
child: Padding(
padding: const EdgeInsets.symmetric(
vertical: 8,
horizontal: 8,
),
child: Text(
_isSearchActive
? 'Matches for \"$_userNameQuery\"'
: 'On the platform',
style: TextStyle(
color: Colors.black.withOpacity(0.5),
),
),
),
), ),
Expanded( ),
child: UserListView(
selectedUsers: _selectedUsers,
groupAlphabetically: _isSearchActive ? false : true,
onUserTap: (user, _) {
if (!_selectedUsers.contains(user)) {
setState(() {
_selectedUsers.add(user);
});
} else {
setState(() {
_selectedUsers.remove(user);
});
}
},
pagination: PaginationParams(
limit: 25,
),
filter: {
if (_userNameQuery.isNotEmpty)
'name': {
r'$autocomplete': _userNameQuery,
},
'id': {
r'$ne': StreamChat.of(context).user.id,
}
},
sort: [
SortOption(
'name',
direction: 1,
),
],
emptyBuilder: (_) {
return LayoutBuilder(
builder: (context, viewportConstraints) {
return SingleChildScrollView(
physics: AlwaysScrollableScrollPhysics(),
child: ConstrainedBox(
constraints: BoxConstraints(
minHeight: viewportConstraints.maxHeight,
),
child: Center(
child: Column(
children: [
Padding(
padding: const EdgeInsets.all(24),
child: Icon(
StreamIcons.search,
size: 96,
color: Colors.grey,
),
),
Text('No user matches these keywords...'),
],
),
),
),
);
},
);
},
),
),
],
), ),
), ),
); );
} }
} }
class _HeaderDelegate extends SliverPersistentHeaderDelegate {
final Widget child;
final double height;
const _HeaderDelegate({
@required this.child,
@required this.height,
});
@override
Widget build(
BuildContext context, double shrinkOffset, bool overlapsContent) {
return Container(
color: Colors.white,
child: child,
);
}
@override
double get maxExtent => height;
@override
double get minExtent => height;
@override
bool shouldRebuild(_HeaderDelegate oldDelegate) => true;
}