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Salvatore Giordano
2021-02-01 15:45:58 +01:00
parent 6682ad5e8b
commit 964a428f2e
445 changed files with 1 additions and 343 deletions
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packages/stream_chat_flutter/lib/src/channel_image.dart
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import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter/material.dart';
import 'package:stream_chat_flutter/src/group_image.dart';
import 'package:stream_chat_flutter/stream_chat_flutter.dart';
import 'package:stream_chat_flutter_core/stream_chat_flutter_core.dart';
/// ![screenshot](https://raw.githubusercontent.com/GetStream/stream-chat-flutter/master/screenshots/channel_image.png)
/// ![screenshot](https://raw.githubusercontent.com/GetStream/stream-chat-flutter/master/screenshots/channel_image_paint.png)
///
/// It shows the current [Channel] image.
///
/// ```dart
/// class MyApp extends StatelessWidget {
/// final StreamChatClient client;
/// final Channel channel;
///
/// MyApp(this.client, this.channel);
///
/// @override
/// Widget build(BuildContext context) {
/// return MaterialApp(
/// debugShowCheckedModeBanner: false,
/// home: StreamChat(
/// client: client,
/// child: StreamChannel(
/// channel: channel,
/// child: Center(
/// child: ChannelImage(
/// channel: channel,
/// ),
/// ),
/// ),
/// ),
/// );
/// }
/// }
/// ```
///
/// The widget uses a [StreamBuilder] to render the channel information image as soon as it updates.
///
/// By default the widget radius size is 40x40 pixels.
/// Set the property [constraints] to set a custom dimension.
///
/// The widget renders the ui based on the first ancestor of type [StreamChatTheme].
/// Modify it to change the widget appearance.
class ChannelImage extends StatelessWidget {
/// Instantiate a new ChannelImage
const ChannelImage({
Key key,
this.channel,
this.constraints,
this.onTap,
this.showOnlineStatus = true,
this.borderRadius,
this.selected = false,
this.selectionColor,
this.selectionThickness = 4,
}) : super(key: key);
final BorderRadius borderRadius;
/// The channel to show the image of
final Channel channel;
/// The diameter of the image
final BoxConstraints constraints;
/// The function called when the image is tapped
final VoidCallback onTap;
final bool showOnlineStatus;
final bool selected;
final Color selectionColor;
final double selectionThickness;
@override
Widget build(BuildContext context) {
final streamChat = StreamChat.of(context);
final channel = this.channel ?? StreamChannel.of(context).channel;
return StreamBuilder<Map<String, dynamic>>(
stream: channel.extraDataStream,
initialData: channel.extraData,
builder: (context, snapshot) {
String image;
if (snapshot.data?.containsKey('image') == true) {
image = snapshot.data['image'];
} else if (channel.state.members?.length == 2) {
final otherMember = channel.state.members
.firstWhere((member) => member.user.id != streamChat.user.id);
return StreamBuilder<User>(
stream: streamChat.client.state.usersStream
.map((users) => users[otherMember.userId]),
initialData: otherMember.user,
builder: (context, snapshot) {
return UserAvatar(
borderRadius: borderRadius,
user: snapshot.data ?? otherMember.user,
constraints: constraints ??
StreamChatTheme.of(context)
.channelPreviewTheme
.avatarTheme
.constraints,
onTap: onTap != null ? (_) => onTap() : null,
selected: selected,
selectionColor: selectionColor ??
StreamChatTheme.of(context).colorTheme.accentBlue,
selectionThickness: selectionThickness,
);
});
} else {
final images = channel.state.members
.where((member) =>
member.user.id != streamChat.user.id &&
member.user.extraData['image'] != null)
.take(4)
.map((e) => e.user.extraData['image'] as String)
.toList();
return GroupImage(
images: images,
borderRadius: borderRadius,
constraints: constraints ??
StreamChatTheme.of(context)
.channelPreviewTheme
.avatarTheme
.constraints,
onTap: onTap,
selected: selected,
selectionColor: selectionColor ??
StreamChatTheme.of(context).colorTheme.accentBlue,
selectionThickness: selectionThickness,
);
}
Widget child = ClipRRect(
borderRadius: borderRadius ??
StreamChatTheme.of(context)
.channelPreviewTheme
.avatarTheme
.borderRadius,
child: Container(
constraints: constraints ??
StreamChatTheme.of(context)
.channelPreviewTheme
.avatarTheme
.constraints,
decoration: BoxDecoration(
color: StreamChatTheme.of(context).colorTheme.accentBlue,
),
child: Stack(
alignment: Alignment.center,
fit: StackFit.expand,
children: <Widget>[
image != null
? CachedNetworkImage(
imageUrl: image,
errorWidget: (_, __, ___) {
return Center(
child: Text(
snapshot.data?.containsKey('name') ?? false
? snapshot.data['name'][0]
: '',
style: TextStyle(
color: StreamChatTheme.of(context)
.colorTheme
.white,
fontWeight: FontWeight.bold,
),
),
);
},
fit: BoxFit.cover,
)
: StreamChatTheme.of(context)
.defaultChannelImage(context, channel),
Material(
color: Colors.transparent,
child: InkWell(
onTap: onTap,
),
),
],
),
),
);
if (selected) {
child = ClipRRect(
borderRadius: (borderRadius ??
StreamChatTheme.of(context)
.ownMessageTheme
.avatarTheme
.borderRadius) +
BorderRadius.circular(selectionThickness),
child: Container(
constraints: constraints ??
StreamChatTheme.of(context)
.ownMessageTheme
.avatarTheme
.constraints,
color: selectionColor ??
StreamChatTheme.of(context).colorTheme.accentBlue,
child: Padding(
padding: EdgeInsets.all(selectionThickness),
child: child,
),
),
);
}
return child;
});
}
}