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Use RefreshIndicator for conversations list

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This commit is contained in:
Pierre HUBERT 2019-05-04 09:21:40 +02:00
parent 1f0d70848f
commit b06c28dc87
1 changed files with 23 additions and 39 deletions
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62
lib/ui/screens/conversations_list_screen.dart
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@ -25,7 +25,8 @@ class _ConversationScreenState extends State<ConversationsListScreen> {
final UsersHelper _usersHelper = UsersHelper();
ConversationsList _list;
LoadErrorLevel _error = LoadErrorLevel.NONE;
bool _loading = true;
final GlobalKey<RefreshIndicatorState> _refreshIndicatorKey =
GlobalKey<RefreshIndicatorState>();
@override
void didChangeDependencies() {
@ -35,14 +36,11 @@ class _ConversationScreenState extends State<ConversationsListScreen> {
@override
void setState(fn) {
if(mounted)
super.setState(fn);
if (mounted) super.setState(fn);
}
void setError(LoadErrorLevel err) => setState(() => _error = err);
void setLoading(bool loading) => setState(() => _loading = loading);
/// Get the list of conversations, once from the cache, once from the server
Future<void> _loadConversations() async {
await _loadConversationsList(true);
@ -50,14 +48,12 @@ class _ConversationScreenState extends State<ConversationsListScreen> {
}
void _gotLoadingError() {
setLoading(false);
setError(_list == null ? LoadErrorLevel.MAJOR : LoadErrorLevel.MINOR);
}
/// Load the list of conversations
Future<void> _loadConversationsList(bool cached) async {
setError(LoadErrorLevel.NONE);
setLoading(true);
//Get the list of conversations
var list;
@ -73,13 +69,10 @@ class _ConversationScreenState extends State<ConversationsListScreen> {
if (list.users == null) return _gotLoadingError();
//Save list
setState(() {
_list = list;
});
setLoading(false);
}
/// Build an error card
@ -88,7 +81,7 @@ class _ConversationScreenState extends State<ConversationsListScreen> {
tr("Could not retrieve the list of conversations!"),
actions: <Widget>[
FlatButton(
onPressed: () => _loadConversationsList(false),
onPressed: () => _refreshIndicatorKey.currentState.show(),
child: Text(
tr("Retry").toUpperCase(),
style: TextStyle(
@ -177,20 +170,25 @@ class _ConversationScreenState extends State<ConversationsListScreen> {
child: _error == LoadErrorLevel.MINOR ? _buildErrorCard() : null,
),
Expanded(
child: ListView.builder(
controller: ScrollController(),
itemBuilder: (context, index) {
return ConversationTile(
conversation: _list.elementAt(index),
usersList: _list.users,
onOpen: (c) {
_openConversation(context, c.id);
},
onRequestUpdate: _updateConversation,
onRequestDelete: _requestDeleteConversation,
);
},
itemCount: _list.length,
child: RefreshIndicator(
onRefresh: () => _loadConversationsList(false),
key: _refreshIndicatorKey,
child: ListView.builder(
physics: AlwaysScrollableScrollPhysics(),
controller: ScrollController(),
itemBuilder: (context, index) {
return ConversationTile(
conversation: _list.elementAt(index),
usersList: _list.users,
onOpen: (c) {
_openConversation(context, c.id);
},
onRequestUpdate: _updateConversation,
onRequestDelete: _requestDeleteConversation,
);
},
itemCount: _list.length,
),
),
),
],
@ -205,20 +203,6 @@ class _ConversationScreenState extends State<ConversationsListScreen> {
child: Icon(Icons.add),
),
),
// Loading indicator
Positioned(
top: 8.0,
left: 0.0,
right: 0.0,
child: Container(
child: !_loading
? null
: Center(
child: CircularProgressIndicator(),
),
),
)
],
);
}