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Merged
Brazol merged 2 commits into from
Mar 26, 2026
+101 −130
Merged

feat(ui): swipe to reply moved to sdk #2567

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1b35e3b
swipe to reply moved to sdk
Brazol Mar 24, 2026
348d71d
reply left-to-right always
Brazol Mar 26, 2026
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72 changes: 2 additions & 70 deletions packages/stream_chat_flutter/example/lib/main.dart
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Original file line number Diff line number Diff line change
@@ -1,8 +1,6 @@
// ignore_for_file: public_member_api_docs

import 'dart:async';
import 'dart:math' as math;
import 'dart:ui';

import 'package:flutter/material.dart';
import 'package:responsive_builder/responsive_builder.dart';
Expand Down Expand Up @@ -254,74 +252,8 @@ class _ChannelPageState extends State<ChannelPage> {
Expanded(
child: StreamMessageListView(
threadBuilder: (_, parent) => ThreadPage(parent: parent!),
messageBuilder: (context, message, defaultProps) {
// The threshold after which the message is considered
// swiped.
const threshold = 0.2;

final currentUser = StreamChat.of(context).currentUser;
final isMyMessage = message.user?.id == currentUser?.id;

// The direction in which the message can be swiped.
final swipeDirection = isMyMessage ? SwipeDirection.endToStart : SwipeDirection.startToEnd;

return Swipeable(
key: ValueKey(message.id),
direction: swipeDirection,
swipeThreshold: threshold,
onSwiped: (details) => reply(message),
backgroundBuilder: (context, details) {
// The alignment of the swipe action.
final alignment = isMyMessage ? Alignment.centerRight : Alignment.centerLeft;

// The progress of the swipe action.
final progress = math.min(details.progress, threshold) / threshold;

// The offset for the reply icon.
var offset = Offset.lerp(
const Offset(-24, 0),
const Offset(12, 0),
progress,
)!;

// If the message is mine, we need to flip the offset.
if (isMyMessage) {
offset = Offset(-offset.dx, -offset.dy);
}

final _streamTheme = StreamChatTheme.of(context);

return Align(
alignment: alignment,
child: Transform.translate(
offset: offset,
child: Opacity(
opacity: progress,
child: SizedBox.square(
dimension: 30,
child: CustomPaint(
painter: AnimatedCircleBorderPainter(
progress: progress,
color: _streamTheme.colorTheme.borders,
),
child: Center(
child: Icon(
context.streamIcons.arrowShareLeft,
size: lerpDouble(0, 18, progress),
color: _streamTheme.colorTheme.accentPrimary,
),
),
),
),
),
),
);
},
child: DefaultStreamMessage(
props: defaultProps.copyWith(onReplyTap: reply),
),
);
},
onReplyTap: reply,
swipeToReply: true,
),
),
StreamMessageInput(
Expand Down
11 changes: 11 additions & 0 deletions packages/stream_chat_flutter/lib/src/message_list_view/message_list_view.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -111,6 +111,7 @@ class StreamMessageListView extends StatefulWidget {
this.onThreadTap,
this.onEditMessageTap,
this.onReplyTap,
this.swipeToReply = false,
this.onUserAvatarTap,
this.onReactionsTap,
this.onQuotedMessageTap,
Expand Down Expand Up @@ -223,6 +224,14 @@ class StreamMessageListView extends StatefulWidget {
/// Forwarded to each [StreamMessageWidget] in the list.
final void Function(Message)? onReplyTap;

/// Whether swiping a message triggers a quoted-reply action.
///
/// Forwarded to each [StreamMessageWidget] in the list via
/// [StreamMessageWidgetProps.swipeToReply].
///
/// Defaults to false.
final bool swipeToReply;

/// Called when a user avatar is tapped.
///
/// Forwarded to each [StreamMessageWidget] in the list.
Expand Down Expand Up @@ -1056,6 +1065,7 @@ class _StreamMessageListViewState extends State<StreamMessageListView> {
) {
final parentMessageProps = StreamMessageWidgetProps(
message: message,
swipeToReply: widget.swipeToReply,
onThreadTap: _onThreadTap,
onMessageTap: widget.onMessageTap,
onMessageLongPress: widget.onMessageLongPress,
Expand Down Expand Up @@ -1200,6 +1210,7 @@ class _StreamMessageListViewState extends State<StreamMessageListView> {

final messageWidgetProps = StreamMessageWidgetProps(
message: message,
swipeToReply: widget.swipeToReply,
onThreadTap: _onThreadTap,
onMessageTap: widget.onMessageTap,
onMessageLongPress: widget.onMessageLongPress,
Expand Down
87 changes: 86 additions & 1 deletion packages/stream_chat_flutter/lib/src/message_widget/message_widget.dart
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Original file line number Diff line number Diff line change
@@ -1,3 +1,6 @@
import 'dart:math' as math;
import 'dart:ui' show lerpDouble;

import 'package:collection/collection.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
Expand Down Expand Up @@ -75,6 +78,7 @@ class StreamMessageWidget extends StatelessWidget {
double? spacing,
Color? backgroundColor,
double widthFactor = 0.8,
bool swipeToReply = false,
void Function(Message)? onMessageTap,
void Function(Message)? onMessageLongPress,
void Function(User)? onUserAvatarTap,
Expand All @@ -96,6 +100,7 @@ class StreamMessageWidget extends StatelessWidget {
spacing: spacing,
backgroundColor: backgroundColor,
widthFactor: widthFactor,
swipeToReply: swipeToReply,
onMessageTap: onMessageTap,
onMessageLongPress: onMessageLongPress,
onUserAvatarTap: onUserAvatarTap,
Expand Down Expand Up @@ -149,6 +154,7 @@ class StreamMessageWidgetProps {
this.spacing,
this.backgroundColor,
this.widthFactor = 0.8,
this.swipeToReply = false,
this.onMessageTap,
this.onMessageLongPress,
this.onUserAvatarTap,
Expand Down Expand Up @@ -198,6 +204,19 @@ class StreamMessageWidgetProps {
/// Values should be between 0.0 and 1.0. Defaults to 0.8 when not specified.
final double widthFactor;

/// Whether swiping the message triggers a quoted-reply action.
///
/// When true, the message can be swiped from left to right to initiate a
/// reply. The swipe direction and reply icon position are always
/// start-to-end (left to right in LTR layouts), regardless of whether the
/// message belongs to the current user or another participant.
/// On completion, [onReplyTap] is invoked with the message.
///
/// Swipe is disabled for deleted messages and messages in a failed state.
///
/// Defaults to false.
final bool swipeToReply;

/// Called when the message is tapped.
///
/// If null, no tap gesture is registered on mobile. On desktop and web,
Expand Down Expand Up @@ -309,6 +328,7 @@ class StreamMessageWidgetProps {
double? spacing,
Color? backgroundColor,
double? widthFactor,
bool? swipeToReply,
void Function(Message)? onMessageTap,
void Function(Message)? onMessageLongPress,
void Function(User)? onUserAvatarTap,
Expand All @@ -331,6 +351,7 @@ class StreamMessageWidgetProps {
spacing: spacing ?? this.spacing,
backgroundColor: backgroundColor ?? this.backgroundColor,
widthFactor: widthFactor ?? this.widthFactor,
swipeToReply: swipeToReply ?? this.swipeToReply,
onMessageTap: onMessageTap ?? this.onMessageTap,
onMessageLongPress: onMessageLongPress ?? this.onMessageLongPress,
onUserAvatarTap: onUserAvatarTap ?? this.onUserAvatarTap,
Expand Down Expand Up @@ -436,7 +457,7 @@ class DefaultStreamMessage extends StatelessWidget {
},
);

return Material(
Widget result = Material(
animateColor: true,
color: effectiveBackgroundColor,
child: PlatformWidgetBuilder(
Expand Down Expand Up @@ -494,6 +515,16 @@ class DefaultStreamMessage extends StatelessWidget {
),
),
);

if (props.swipeToReply && props.onReplyTap != null && !message.isDeleted && !message.state.isFailed) {
result = _SwipeToReplyWrapper(
message: message,
onReplyTap: props.onReplyTap!,
child: result,
);
}

return result;
}

// Builds the action list for a bounced (moderation-error) message.
Expand Down Expand Up @@ -855,6 +886,60 @@ extension on Poll {
}
}

class _SwipeToReplyWrapper extends StatelessWidget {
const _SwipeToReplyWrapper({
required this.message,
required this.onReplyTap,
required this.child,
});

final Message message;
final void Function(Message) onReplyTap;
final Widget child;

static const _swipeThreshold = 0.2;

@override
Widget build(BuildContext context) {
return Swipeable(
key: ValueKey('swipe-${message.id}'),
direction: SwipeDirection.startToEnd,
swipeThreshold: _swipeThreshold,
onSwiped: (_) => onReplyTap(message),
backgroundBuilder: (context, details) {
final progress = math.min(details.progress, _swipeThreshold) / _swipeThreshold;
final offset = Offset.lerp(const Offset(-24, 0), const Offset(12, 0), progress)!;

return Align(
alignment: AlignmentDirectional.centerStart,
child: Transform.translate(
offset: offset,
child: Opacity(
opacity: progress,
child: SizedBox.square(
dimension: 32,
child: CustomPaint(
painter: AnimatedCircleBorderPainter(
progress: progress,
color: context.streamColorScheme.borderDefault,
),
child: Center(
child: Icon(
context.streamIcons.arrowShareLeft,
size: lerpDouble(0, 20, progress),
),
),
),
),
),
),
);
},
child: child,
);
}
}

// Built-in fallback theme values for [DefaultStreamMessage].
//
// Used when neither the explicit props nor the ambient
Expand Down
60 changes: 1 addition & 59 deletions sample_app/lib/pages/channel_page.dart
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Original file line number Diff line number Diff line change
@@ -1,8 +1,5 @@
// ignore_for_file: deprecated_member_use, avoid_redundant_argument_values

import 'dart:math' as math;
import 'dart:ui';

import 'package:collection/collection.dart';
import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';
Expand Down Expand Up @@ -106,8 +103,8 @@ class _ChannelPageState extends State<ChannelPage> {
highlightInitialMessage: widget.highlightInitialMessage,
onEditMessageTap: _editMessage,
onReplyTap: _reply,
swipeToReply: true,
messageFilter: defaultFilter,
messageBuilder: _messageBuilder,
threadBuilder: (_, parentMessage) {
return ThreadPage(parent: parentMessage!);
},
Expand Down Expand Up @@ -201,61 +198,6 @@ class _ChannelPageState extends State<ChannelPage> {
return channel.sendStaticLocation(location: result.coordinates);
}

Widget _messageBuilder(
BuildContext context,
Message message,
StreamMessageWidgetProps defaultProps,
) {
final defaultWidget = StreamMessageWidget.fromProps(props: defaultProps);

if (message.isDeleted || message.state.isFailed) return defaultWidget;

final alignment = StreamMessagePlacement.alignmentDirectionalOf(context);
final isEnd = alignment == AlignmentDirectional.centerEnd;

const threshold = 0.2;

return Swipeable(
key: ValueKey(message.id),
direction: isEnd ? SwipeDirection.endToStart : SwipeDirection.startToEnd,
swipeThreshold: threshold,
onSwiped: (_) => _reply(message),
backgroundBuilder: (context, details) {
final progress = math.min(details.progress, threshold) / threshold;

var offset = Offset.lerp(const Offset(-24, 0), const Offset(12, 0), progress)!;
if (isEnd) offset = Offset(-offset.dx, -offset.dy);

return Align(
alignment: alignment,
child: Transform.translate(
offset: offset,
child: Opacity(
opacity: progress,
child: SizedBox.square(
dimension: 30,
child: CustomPaint(
painter: AnimatedCircleBorderPainter(
progress: progress,
color: context.streamColorScheme.borderDefault,
),
child: Center(
child: Icon(
context.streamIcons.arrowShareLeft,
size: lerpDouble(0, 18, progress),
color: context.streamColorScheme.accentPrimary,
),
),
),
),
),
),
);
},
child: defaultWidget,
);
}

bool defaultFilter(Message m) {
final currentUser = StreamChat.of(context).currentUser;
final isMyMessage = m.user?.id == currentUser?.id;
Expand Down
1 change: 1 addition & 0 deletions sample_app/lib/pages/thread_page.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,7 @@ class _ThreadPageState extends State<ThreadPage> {
initialScrollIndex: widget.initialScrollIndex,
initialAlignment: widget.initialAlignment,
onReplyTap: _reply,
swipeToReply: true,
messageFilter: defaultFilter,
showScrollToBottom: false,
highlightInitialMessage: true,
Expand Down
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