59 lines
1.7 KiB
Dart
59 lines
1.7 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:stream_chat/stream_chat.dart';
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import 'package:stream_chat_flutter/src/stream_channel.dart';
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/// Widget to show the current list of typing users
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class TypingIndicator extends StatelessWidget {
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/// Instantiate a new TypingIndicator
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const TypingIndicator({
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Key key,
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this.channel,
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this.alternativeWidget = const SizedBox(),
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this.style,
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this.alignment = Alignment.centerLeft,
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}) : super(key: key);
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/// Style of the text widget
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final TextStyle style;
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/// List of typing users
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final Channel channel;
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/// Widget built when no typings is happening
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final Widget alternativeWidget;
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final Alignment alignment;
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@override
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Widget build(BuildContext context) {
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final channelState =
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channel?.state ?? StreamChannel.of(context).channel.state;
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return StreamBuilder<List<User>>(
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initialData: channelState.typingEvents,
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stream: channelState.typingEventsStream,
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builder: (context, snapshot) {
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return AnimatedSwitcher(
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duration: Duration(milliseconds: 300),
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child: snapshot.data?.isNotEmpty == true
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? Align(
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key: Key('typings'),
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alignment: alignment,
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child: Text(
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'${snapshot.data.map((u) => u.name).join(',')} ${snapshot.data.length == 1 ? 'is' : 'are'} typing...',
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maxLines: 1,
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style: style,
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),
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)
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: Align(
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key: Key('alternative'),
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alignment: alignment,
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child: Container(
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child: alternativeWidget,
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),
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),
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);
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},
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);
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}
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}
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