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This commit is contained in:
Salvatore Giordano
2020-11-25 15:03:22 +01:00
parent b20caeee8f
commit 11267248da
6 changed files with 269 additions and 166 deletions
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lib/src/channel_list_view.dart
+109 -108
View File
@@ -166,123 +166,124 @@ class _ChannelListViewState extends State<ChannelListView>
ChannelsBlocState channelsBlocState,
) {
return StreamBuilder<List<Channel>>(
stream: channelsBlocState.channelsStream,
builder: (context, snapshot) {
var child;
if (snapshot.hasError) {
child = _buildErrorWidget(
snapshot,
context,
channelsBlocState,
);
} else if (!snapshot.hasData) {
child = _buildLoadingWidget();
} else {
final channels = snapshot.data;
stream: channelsBlocState.channelsStream,
builder: (context, snapshot) {
var child;
if (snapshot.hasError) {
child = _buildErrorWidget(
snapshot,
context,
channelsBlocState,
);
} else if (!snapshot.hasData) {
child = _buildLoadingWidget();
} else {
final channels = snapshot.data;
if (channels.isEmpty && widget.emptyBuilder != null) {
child = widget.emptyBuilder(context);
}
if (channels.isEmpty && widget.emptyBuilder != null) {
child = widget.emptyBuilder(context);
}
if (channels.isEmpty && widget.emptyBuilder == null) {
child = LayoutBuilder(
builder: (context, viewportConstraints) {
return SingleChildScrollView(
physics: AlwaysScrollableScrollPhysics(),
child: Stack(
children: [
ConstrainedBox(
constraints: BoxConstraints(
minHeight: viewportConstraints.maxHeight,
),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Padding(
padding: const EdgeInsets.all(8.0),
child: Icon(
StreamIcons.message,
size: 136,
color: Color(0xffDBDBDB),
),
),
Padding(
padding: const EdgeInsets.all(8.0),
child: Text(
'Let’s start chatting!',
style: TextStyle(
fontSize: 16,
),
),
),
Padding(
padding: const EdgeInsets.symmetric(
vertical: 8.0,
horizontal: 52,
),
child: Text(
'How about sending your first message to a friend?',
textAlign: TextAlign.center,
style: TextStyle(
fontSize: 14,
color: Color(0xff7A7A7A),
),
),
),
],
),
if (channels.isEmpty && widget.emptyBuilder == null) {
child = LayoutBuilder(
builder: (context, viewportConstraints) {
return SingleChildScrollView(
physics: AlwaysScrollableScrollPhysics(),
child: Stack(
children: [
ConstrainedBox(
constraints: BoxConstraints(
minHeight: viewportConstraints.maxHeight,
),
if (widget.onStartChatPressed != null)
Positioned(
right: 0,
left: 0,
bottom: 32,
child: Center(
child: FlatButton(
onPressed: widget.onStartChatPressed,
child: Text(
'Start a chat',
style: TextStyle(
color:
StreamChatTheme.of(context).accentColor,
fontWeight: FontWeight.bold,
),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Padding(
padding: const EdgeInsets.all(8.0),
child: Icon(
StreamIcons.message,
size: 136,
color: Color(0xffDBDBDB),
),
),
Padding(
padding: const EdgeInsets.all(8.0),
child: Text(
'Let’s start chatting!',
style: TextStyle(
fontSize: 16,
),
),
),
Padding(
padding: const EdgeInsets.symmetric(
vertical: 8.0,
horizontal: 52,
),
child: Text(
'How about sending your first message to a friend?',
textAlign: TextAlign.center,
style: TextStyle(
fontSize: 14,
color: Color(0xff7A7A7A),
),
),
),
],
),
),
if (widget.onStartChatPressed != null)
Positioned(
right: 0,
left: 0,
bottom: 32,
child: Center(
child: FlatButton(
onPressed: widget.onStartChatPressed,
child: Text(
'Start a chat',
style: TextStyle(
color:
StreamChatTheme.of(context).accentColor,
fontWeight: FontWeight.bold,
),
),
),
),
],
),
);
},
);
}
if (channels.isNotEmpty) {
child = ListView.custom(
physics: AlwaysScrollableScrollPhysics(),
controller: _scrollController,
childrenDelegate: SliverChildBuilderDelegate(
(context, i) {
return _itemBuilder(context, i, channels);
},
childCount: (channels.length * 2) + 1,
findChildIndexCallback: (key) {
final ValueKey<String> valueKey = key;
final index = channels.indexWhere(
(channel) => 'CHANNEL-${channel.id}' == valueKey.value);
return index != -1 ? (index * 2) : null;
},
),
);
}
),
],
),
);
},
);
}
return AnimatedSwitcher(
child: child,
duration: Duration(milliseconds: 500),
);
});
if (channels.isNotEmpty) {
child = ListView.custom(
physics: AlwaysScrollableScrollPhysics(),
controller: _scrollController,
childrenDelegate: SliverChildBuilderDelegate(
(context, i) {
return _itemBuilder(context, i, channels);
},
childCount: (channels.length * 2) + 1,
findChildIndexCallback: (key) {
final ValueKey<String> valueKey = key;
final index = channels.indexWhere(
(channel) => 'CHANNEL-${channel.id}' == valueKey.value);
return index != -1 ? (index * 2) : null;
},
),
);
}
}
return AnimatedSwitcher(
child: child,
duration: Duration(milliseconds: 500),
);
},
);
}
Widget _buildLoadingWidget() {