77 lines
2.4 KiB
Dart
77 lines
2.4 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:lottie/lottie.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,
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this.style,
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this.alignment = Alignment.centerLeft,
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this.padding = const EdgeInsets.all(0),
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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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/// The padding of this widget
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final EdgeInsets padding;
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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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? Padding(
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padding: padding,
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child: Align(
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key: Key('typings'),
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alignment: alignment,
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child: Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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Lottie.asset(
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'animations/typing_dots.json',
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package: 'stream_chat_flutter',
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height: 4,
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),
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Text(
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' ${snapshot.data[0].name}${snapshot.data.length == 1 ? '' : ' and ${snapshot.data.length - 1} more'} ${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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),
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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 ?? Offstage(),
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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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