add onLongPress to channel preview

example/lib/main.dart

@@ -68,6 +68,7 @@ void main() async {
     's2dxdhpxd94g',
     logLevel: Level.INFO,
     showLocalNotification: Platform.isAndroid ? showLocalNotification : null,
+    backgroundKeepAlive: Duration.zero,
   );
 
   await client.setUser(
@@ -87,13 +88,12 @@ class MyApp extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final theme = ThemeData();
     return MaterialApp(
-      theme: theme,
+      theme: ThemeData.light(),
+      darkTheme: ThemeData.dark(),
       themeMode: ThemeMode.system,
       home: Container(
         child: StreamChat(
-          streamChatThemeData: StreamChatThemeData.fromTheme(theme),
           client: client,
           child: ChannelListPage(),
         ),

lib/src/channel_list_view.dart

@@ -55,6 +55,7 @@ class ChannelListView extends StatefulWidget {
     this.sort,
     this.pagination,
     this.onChannelTap,
+    this.onChannelLongPress,
     this.channelWidget,
     this.channelPreviewBuilder,
     this.errorBuilder,
@@ -92,6 +93,9 @@ class ChannelListView extends StatefulWidget {
   /// with the widget [channelWidget] as child.
   final ChannelTapCallback onChannelTap;
 
+  /// Function called when long pressing on a channel
+  final Function(Channel) onChannelLongPress;
+
   /// Widget used when opening a channel
   final Widget channelWidget;
 
@@ -271,6 +275,7 @@ class _ChannelListViewState extends State<ChannelListView>
               );
             } else {
               child = ChannelPreview(
+                onLongPress: widget.onChannelLongPress,
                 channel: channel,
                 onImageTap: widget.onImageTap != null
                     ? () {

lib/src/channel_preview.dart

@@ -23,6 +23,9 @@ class ChannelPreview extends StatelessWidget {
   /// Function called when tapping this widget
   final void Function(Channel) onTap;
 
+  /// Function called when long pressing this widget
+  final void Function(Channel) onLongPress;
+
   /// Channel displayed
   final Channel channel;
 
@@ -33,6 +36,7 @@ class ChannelPreview extends StatelessWidget {
     @required this.channel,
     Key key,
     this.onTap,
+    this.onLongPress,
     this.onImageTap,
   }) : super(key: key);
 
@@ -40,7 +44,14 @@ class ChannelPreview extends StatelessWidget {
   Widget build(BuildContext context) {
     return ListTile(
       onTap: () {
-        onTap(channel);
+        if (onTap != null) {
+          onTap(channel);
+        }
+      },
+      onLongPress: () {
+        if (onLongPress != null) {
+          onLongPress(channel);
+        }
       },
       leading: ChannelImage(
         onTap: onImageTap,

pubspec.yaml

@@ -20,7 +20,8 @@ dependencies:
   file_picker: ^1.8.0+2
   image_picker: ^0.6.5+3
   flutter_keyboard_visibility: ^2.0.0
-  stream_chat: ^0.2.0-alpha+8
+  stream_chat:
+    path: ../stream_chat_dart
   mime: ^0.9.6+3
   visibility_detector: ^0.1.4
   http_parser: ^3.1.4