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[UserListView] Use LazyLoadScrollView for pagination rather than listening scroll controller

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This commit is contained in:
xsahil03x
2020-11-24 21:45:42 +05:30
parent a0afe4d091
commit 2ee8b72a31
2 changed files with 119 additions and 48 deletions
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lib/src/user_list_view.dart
+38 -48
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@@ -2,6 +2,7 @@ import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:stream_chat/stream_chat.dart';
import 'package:stream_chat_flutter/src/lazy_load_scroll_view.dart';
import 'package:stream_chat_flutter/src/users_bloc.dart';
import 'package:stream_chat_flutter/stream_chat_flutter.dart';
@@ -144,8 +145,6 @@ class UserListView extends StatefulWidget {
class _UserListViewState extends State<UserListView>
with WidgetsBindingObserver {
final ScrollController _scrollController = ScrollController();
bool get _isListView => widget.crossAxisCount == 1;
@override
@@ -158,14 +157,6 @@ class _UserListViewState extends State<UserListView>
pagination: widget.pagination,
options: widget.options,
);
_scrollController.addListener(() {
usersBloc.queryUsersLoading.first.then((loading) {
if (!loading) {
_listenUserPagination(usersBloc);
}
});
});
}
@override
@@ -327,32 +318,35 @@ class _UserListViewState extends State<UserListView>
);
}
if (_isListView) {
return ListView.separated(
physics: AlwaysScrollableScrollPhysics(),
controller: _scrollController,
itemCount: items.isNotEmpty ? items.length + 1 : items.length,
separatorBuilder: (_, index) {
if (widget.separatorBuilder != null) {
return widget.separatorBuilder(context, index);
}
return _separatorBuilder(context, index);
},
itemBuilder: (context, index) {
return _listItemBuilder(context, index, items);
},
);
}
return GridView.builder(
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: widget.crossAxisCount,
),
itemCount: items.isNotEmpty ? items.length + 1 : items.length,
physics: AlwaysScrollableScrollPhysics(),
controller: _scrollController,
itemBuilder: (context, index) {
return _gridItemBuilder(context, index, items);
},
final child = _isListView
? ListView.separated(
physics: AlwaysScrollableScrollPhysics(),
// controller: _scrollController,
itemCount: items.isNotEmpty ? items.length + 1 : items.length,
separatorBuilder: (_, index) {
if (widget.separatorBuilder != null) {
return widget.separatorBuilder(context, index);
}
return _separatorBuilder(context, index);
},
itemBuilder: (context, index) {
return _listItemBuilder(context, index, items);
},
)
: GridView.builder(
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: widget.crossAxisCount,
),
itemCount: items.isNotEmpty ? items.length + 1 : items.length,
physics: AlwaysScrollableScrollPhysics(),
itemBuilder: (context, index) {
return _gridItemBuilder(context, index, items);
},
);
return LazyLoadScrollView(
onEndOfPage: () => _listenUserPagination(usersBlocState),
child: child,
);
},
);
@@ -488,18 +482,14 @@ class _UserListViewState extends State<UserListView>
}
void _listenUserPagination(UsersBlocState usersProvider) {
if (_scrollController.position.maxScrollExtent ==
_scrollController.offset &&
_scrollController.offset != 0) {
usersProvider.queryUsers(
filter: widget.filter,
sort: widget.sort,
pagination: widget.pagination.copyWith(
offset: usersProvider.users?.length ?? 0,
),
options: widget.options,
);
}
usersProvider.queryUsers(
filter: widget.filter,
sort: widget.sort,
pagination: widget.pagination.copyWith(
offset: usersProvider.users?.length ?? 0,
),
options: widget.options,
);
}
@override