✨ Introduces PositionedGestureDetails (#160714)

Resolves #101530

`PositionedGestureDetails` is an abstract interface that is meant to
contain positions for pointer events.

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

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[Tree Hygiene]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md
[test-exempt]:
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[Flutter Style Guide]:
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[Features we expect every widget to implement]:
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[Discord]:
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[Data Driven Fixes]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md

packages/flutter/lib/gestures.dart

@@ -17,6 +17,7 @@ export 'src/gestures/drag_details.dart';
 export 'src/gestures/eager.dart';
 export 'src/gestures/events.dart';
 export 'src/gestures/force_press.dart';
+export 'src/gestures/gesture_details.dart';
 export 'src/gestures/gesture_settings.dart';
 export 'src/gestures/hit_test.dart';
 export 'src/gestures/long_press.dart';

packages/flutter/lib/src/gestures/drag_details.dart

@@ -7,6 +7,7 @@ library;
 
 import 'package:flutter/foundation.dart';
 
+import 'gesture_details.dart';
 import 'velocity_tracker.dart';
 
 export 'dart:ui' show Offset, PointerDeviceKind;
@@ -21,29 +22,25 @@ export 'velocity_tracker.dart' show Velocity;
 ///  * [DragStartDetails], the details for [GestureDragStartCallback].
 ///  * [DragUpdateDetails], the details for [GestureDragUpdateCallback].
 ///  * [DragEndDetails], the details for [GestureDragEndCallback].
-class DragDownDetails {
+class DragDownDetails with Diagnosticable implements PositionedGestureDetails {
   /// Creates details for a [GestureDragDownCallback].
   DragDownDetails({this.globalPosition = Offset.zero, Offset? localPosition})
     : localPosition = localPosition ?? globalPosition;
 
-  /// The global position at which the pointer contacted the screen.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.globalPosition}
-  ///
+  @override
-  /// Defaults to the origin if not specified in the constructor.
-  ///
-  /// See also:
-  ///
-  ///  * [localPosition], which is the [globalPosition] transformed to the
-  ///    coordinate space of the event receiver.
   final Offset globalPosition;
 
-  /// The local position in the coordinate system of the event receiver at
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.localPosition}
-  /// which the pointer contacted the screen.
+  @override
-  ///
-  /// Defaults to [globalPosition] if not specified in the constructor.
   final Offset localPosition;
 
   @override
-  String toString() => '${objectRuntimeType(this, 'DragDownDetails')}($globalPosition)';
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+    super.debugFillProperties(properties);
+    properties.add(DiagnosticsProperty<Offset>('globalPosition', globalPosition));
+    properties.add(DiagnosticsProperty<Offset>('localPosition', localPosition));
+  }
 }
 
 /// Signature for when a pointer has contacted the screen and might begin to
@@ -62,46 +59,40 @@ typedef GestureDragDownCallback = void Function(DragDownDetails details);
 ///  * [DragDownDetails], the details for [GestureDragDownCallback].
 ///  * [DragUpdateDetails], the details for [GestureDragUpdateCallback].
 ///  * [DragEndDetails], the details for [GestureDragEndCallback].
-class DragStartDetails {
+class DragStartDetails with Diagnosticable implements PositionedGestureDetails {
   /// Creates details for a [GestureDragStartCallback].
   DragStartDetails({
-    this.sourceTimeStamp,
     this.globalPosition = Offset.zero,
     Offset? localPosition,
+    this.sourceTimeStamp,
     this.kind,
   }) : localPosition = localPosition ?? globalPosition;
 
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.globalPosition}
+  @override
+  final Offset globalPosition;
+
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.localPosition}
+  @override
+  final Offset localPosition;
+
   /// Recorded timestamp of the source pointer event that triggered the drag
   /// event.
   ///
   /// Could be null if triggered from proxied events such as accessibility.
   final Duration? sourceTimeStamp;
 
-  /// The global position at which the pointer contacted the screen.
-  ///
-  /// Defaults to the origin if not specified in the constructor.
-  ///
-  /// See also:
-  ///
-  ///  * [localPosition], which is the [globalPosition] transformed to the
-  ///    coordinate space of the event receiver.
-  final Offset globalPosition;
-
-  /// The local position in the coordinate system of the event receiver at
-  /// which the pointer contacted the screen.
-  ///
-  /// Defaults to [globalPosition] if not specified in the constructor.
-  final Offset localPosition;
-
   /// The kind of the device that initiated the event.
   final PointerDeviceKind? kind;
 
-  // TODO(ianh): Expose the current position, so that you can have a no-jump
-  // drag even when disambiguating (though of course it would lag the finger
-  // instead).
-
   @override
-  String toString() => '${objectRuntimeType(this, 'DragStartDetails')}($globalPosition)';
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+    super.debugFillProperties(properties);
+    properties.add(DiagnosticsProperty<Offset>('globalPosition', globalPosition));
+    properties.add(DiagnosticsProperty<Offset>('localPosition', localPosition));
+    properties.add(DiagnosticsProperty<Duration?>('sourceTimeStamp', sourceTimeStamp));
+    properties.add(EnumProperty<PointerDeviceKind?>('kind', kind));
+  }
 }
 
 /// {@template flutter.gestures.dragdetails.GestureDragStartCallback}
@@ -122,17 +113,17 @@ typedef GestureDragStartCallback = void Function(DragStartDetails details);
 ///  * [DragDownDetails], the details for [GestureDragDownCallback].
 ///  * [DragStartDetails], the details for [GestureDragStartCallback].
 ///  * [DragEndDetails], the details for [GestureDragEndCallback].
-class DragUpdateDetails {
+class DragUpdateDetails with Diagnosticable implements PositionedGestureDetails {
   /// Creates details for a [GestureDragUpdateCallback].
   ///
   /// If [primaryDelta] is non-null, then its value must match one of the
   /// coordinates of [delta] and the other coordinate must be zero.
   DragUpdateDetails({
+    required this.globalPosition,
+    Offset? localPosition,
     this.sourceTimeStamp,
     this.delta = Offset.zero,
     this.primaryDelta,
-    required this.globalPosition,
-    Offset? localPosition,
   }) : assert(
          primaryDelta == null ||
              (primaryDelta == delta.dx && delta.dy == 0.0) ||
@@ -140,6 +131,14 @@ class DragUpdateDetails {
        ),
        localPosition = localPosition ?? globalPosition;
 
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.globalPosition}
+  @override
+  final Offset globalPosition;
+
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.localPosition}
+  @override
+  final Offset localPosition;
+
   /// Recorded timestamp of the source pointer event that triggered the drag
   /// event.
   ///
@@ -169,22 +168,15 @@ class DragUpdateDetails {
   /// Defaults to null if not specified in the constructor.
   final double? primaryDelta;
 
-  /// The pointer's global position when it triggered this update.
-  ///
-  /// See also:
-  ///
-  ///  * [localPosition], which is the [globalPosition] transformed to the
-  ///    coordinate space of the event receiver.
-  final Offset globalPosition;
-
-  /// The local position in the coordinate system of the event receiver at
-  /// which the pointer contacted the screen.
-  ///
-  /// Defaults to [globalPosition] if not specified in the constructor.
-  final Offset localPosition;
-
   @override
-  String toString() => '${objectRuntimeType(this, 'DragUpdateDetails')}($delta)';
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+    super.debugFillProperties(properties);
+    properties.add(DiagnosticsProperty<Offset>('globalPosition', globalPosition));
+    properties.add(DiagnosticsProperty<Offset>('localPosition', localPosition));
+    properties.add(DiagnosticsProperty<Duration?>('sourceTimeStamp', sourceTimeStamp));
+    properties.add(DiagnosticsProperty<Offset>('delta', delta));
+    properties.add(DoubleProperty('primaryDelta', primaryDelta));
+  }
 }
 
 /// {@template flutter.gestures.dragdetails.GestureDragUpdateCallback}
@@ -206,17 +198,17 @@ typedef GestureDragUpdateCallback = void Function(DragUpdateDetails details);
 ///  * [DragDownDetails], the details for [GestureDragDownCallback].
 ///  * [DragStartDetails], the details for [GestureDragStartCallback].
 ///  * [DragUpdateDetails], the details for [GestureDragUpdateCallback].
-class DragEndDetails {
+class DragEndDetails with Diagnosticable implements PositionedGestureDetails {
   /// Creates details for a [GestureDragEndCallback].
   ///
   /// If [primaryVelocity] is non-null, its value must match one of the
   /// coordinates of `velocity.pixelsPerSecond` and the other coordinate
   /// must be zero.
   DragEndDetails({
-    this.velocity = Velocity.zero,
-    this.primaryVelocity,
     this.globalPosition = Offset.zero,
     Offset? localPosition,
+    this.velocity = Velocity.zero,
+    this.primaryVelocity,
   }) : assert(
          primaryVelocity == null ||
              (primaryVelocity == velocity.pixelsPerSecond.dx && velocity.pixelsPerSecond.dy == 0) ||
@@ -224,6 +216,14 @@ class DragEndDetails {
        ),
        localPosition = localPosition ?? globalPosition;
 
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.globalPosition}
+  @override
+  final Offset globalPosition;
+
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.localPosition}
+  @override
+  final Offset localPosition;
+
   /// The velocity the pointer was moving when it stopped contacting the screen.
   ///
   /// Defaults to zero if not specified in the constructor.
@@ -241,23 +241,12 @@ class DragEndDetails {
   /// Defaults to null if not specified in the constructor.
   final double? primaryVelocity;
 
-  /// The global position the pointer is located at when the drag
-  /// gesture has been completed.
-  ///
-  /// Defaults to the origin if not specified in the constructor.
-  ///
-  /// See also:
-  ///
-  ///  * [localPosition], which is the [globalPosition] transformed to the
-  ///    coordinate space of the event receiver.
-  final Offset globalPosition;
-
-  /// The local position in the coordinate system of the event receiver when
-  /// the drag gesture has been completed.
-  ///
-  /// Defaults to [globalPosition] if not specified in the constructor.
-  final Offset localPosition;
-
   @override
-  String toString() => '${objectRuntimeType(this, 'DragEndDetails')}($velocity)';
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+    super.debugFillProperties(properties);
+    properties.add(DiagnosticsProperty<Offset>('globalPosition', globalPosition));
+    properties.add(DiagnosticsProperty<Offset>('localPosition', localPosition));
+    properties.add(DiagnosticsProperty<Velocity>('velocity', velocity));
+    properties.add(DoubleProperty('primaryVelocity', primaryVelocity));
+  }
 }

packages/flutter/lib/src/gestures/force_press.dart

@@ -2,9 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'package:flutter/foundation.dart' show clampDouble;
+import 'package:flutter/foundation.dart';
 
 import 'events.dart';
+import 'gesture_details.dart';
 import 'recognizer.dart';
 
 export 'dart:ui' show Offset, PointerDeviceKind;
@@ -43,20 +44,30 @@ enum _ForceState {
 ///  * [ForcePressGestureRecognizer.onStart], [ForcePressGestureRecognizer.onPeak],
 ///    [ForcePressGestureRecognizer.onEnd], and [ForcePressGestureRecognizer.onUpdate]
 ///    which use [ForcePressDetails].
-class ForcePressDetails {
+class ForcePressDetails with Diagnosticable implements PositionedGestureDetails {
   /// Creates details for a [GestureForcePressStartCallback],
   /// [GestureForcePressPeakCallback] or [GestureForcePressEndCallback].
   ForcePressDetails({required this.globalPosition, Offset? localPosition, required this.pressure})
     : localPosition = localPosition ?? globalPosition;
 
-  /// The global position at which the function was called.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.globalPosition}
+  @override
   final Offset globalPosition;
 
-  /// The local position at which the function was called.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.localPosition}
+  @override
   final Offset localPosition;
 
   /// The pressure of the pointer on the screen.
   final double pressure;
+
+  @override
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+    super.debugFillProperties(properties);
+    properties.add(DiagnosticsProperty<Offset>('globalPosition', globalPosition));
+    properties.add(DiagnosticsProperty<Offset>('localPosition', localPosition));
+    properties.add(DoubleProperty('pressure', pressure));
+  }
 }
 
 /// Signature used by a [ForcePressGestureRecognizer] for when a pointer has

packages/flutter/lib/src/gestures/gesture_details.dart

@@ -0,0 +1,43 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:ui' show Offset;
+
+/// An abstract interface representing gesture details that include positional information.
+///
+/// This class serve as a common interface for gesture details that involve positional data,
+/// such as dragging and tapping. It simplifies gesture handling by enabling the use of shared logic
+/// across multiple gesture types, users can create a method to handle a single gesture details
+/// with this position information. For example:
+///
+/// ```dart
+/// void handlePositionedGestures(PositionedGestureDetails details) {
+///   // Handle the positional information of the gesture details.
+/// }
+/// ```
+abstract interface class PositionedGestureDetails {
+  /// Creates details with positions.
+  const PositionedGestureDetails({required this.globalPosition, required this.localPosition});
+
+  /// {@template flutter.gestures.gesturedetails.PositionedGestureDetails.globalPosition}
+  /// The global position at which the pointer interacts with the screen.
+  ///
+  /// See also:
+  ///
+  ///  * [localPosition], which is the [globalPosition] transformed to the
+  ///    coordinate space of the event receiver.
+  /// {@endtemplate}
+  final Offset globalPosition;
+
+  /// {@template flutter.gestures.gesturedetails.PositionedGestureDetails.localPosition}
+  /// The local position in the coordinate system of the event receiver at
+  /// which the pointer interacts with the screen.
+  ///
+  /// See also:
+  ///
+  ///  * [globalPosition], which is the global position at which the pointer
+  ///    interacts with the screen.
+  /// {@endtemplate}
+  final Offset localPosition;
+}

packages/flutter/lib/src/gestures/long_press.dart

@@ -5,8 +5,11 @@
 /// @docImport 'package:flutter/widgets.dart';
 library;
 
+import 'package:flutter/foundation.dart';
+
 import 'constants.dart';
 import 'events.dart';
+import 'gesture_details.dart';
 import 'recognizer.dart';
 import 'velocity_tracker.dart';
 
@@ -107,7 +110,7 @@ typedef GestureLongPressEndCallback = void Function(LongPressEndDetails details)
 ///    passes these details.
 ///  * [LongPressGestureRecognizer.onTertiaryLongPressDown], whose callback
 ///    passes these details.
-class LongPressDownDetails {
+class LongPressDownDetails with Diagnosticable implements PositionedGestureDetails {
   /// Creates the details for a [GestureLongPressDownCallback].
   ///
   /// If the `localPosition` argument is not specified, it will default to the
@@ -115,14 +118,24 @@ class LongPressDownDetails {
   const LongPressDownDetails({this.globalPosition = Offset.zero, Offset? localPosition, this.kind})
     : localPosition = localPosition ?? globalPosition;
 
-  /// The global position at which the pointer contacted the screen.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.globalPosition}
+  @override
   final Offset globalPosition;
 
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.localPosition}
+  @override
+  final Offset localPosition;
+
   /// The kind of the device that initiated the event.
   final PointerDeviceKind? kind;
 
-  /// The local position at which the pointer contacted the screen.
+  @override
-  final Offset localPosition;
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+    super.debugFillProperties(properties);
+    properties.add(DiagnosticsProperty<Offset>('globalPosition', globalPosition));
+    properties.add(DiagnosticsProperty<Offset>('localPosition', localPosition));
+    properties.add(EnumProperty<PointerDeviceKind?>('kind', kind));
+  }
 }
 
 /// Details for callbacks that use [GestureLongPressStartCallback].
@@ -132,16 +145,25 @@ class LongPressDownDetails {
 ///  * [LongPressGestureRecognizer.onLongPressStart], which uses [GestureLongPressStartCallback].
 ///  * [LongPressMoveUpdateDetails], the details for [GestureLongPressMoveUpdateCallback]
 ///  * [LongPressEndDetails], the details for [GestureLongPressEndCallback].
-class LongPressStartDetails {
+class LongPressStartDetails with Diagnosticable implements PositionedGestureDetails {
   /// Creates the details for a [GestureLongPressStartCallback].
   const LongPressStartDetails({this.globalPosition = Offset.zero, Offset? localPosition})
     : localPosition = localPosition ?? globalPosition;
 
-  /// The global position at which the pointer initially contacted the screen.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.globalPosition}
+  @override
   final Offset globalPosition;
 
-  /// The local position at which the pointer initially contacted the screen.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.localPosition}
+  @override
   final Offset localPosition;
+
+  @override
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+    super.debugFillProperties(properties);
+    properties.add(DiagnosticsProperty<Offset>('globalPosition', globalPosition));
+    properties.add(DiagnosticsProperty<Offset>('localPosition', localPosition));
+  }
 }
 
 /// Details for callbacks that use [GestureLongPressMoveUpdateCallback].
@@ -151,7 +173,7 @@ class LongPressStartDetails {
 ///  * [LongPressGestureRecognizer.onLongPressMoveUpdate], which uses [GestureLongPressMoveUpdateCallback].
 ///  * [LongPressEndDetails], the details for [GestureLongPressEndCallback]
 ///  * [LongPressStartDetails], the details for [GestureLongPressStartCallback].
-class LongPressMoveUpdateDetails {
+class LongPressMoveUpdateDetails with Diagnosticable implements PositionedGestureDetails {
   /// Creates the details for a [GestureLongPressMoveUpdateCallback].
   const LongPressMoveUpdateDetails({
     this.globalPosition = Offset.zero,
@@ -161,10 +183,12 @@ class LongPressMoveUpdateDetails {
   }) : localPosition = localPosition ?? globalPosition,
        localOffsetFromOrigin = localOffsetFromOrigin ?? offsetFromOrigin;
 
-  /// The global position of the pointer when it triggered this update.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.globalPosition}
+  @override
   final Offset globalPosition;
 
-  /// The local position of the pointer when it triggered this update.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.localPosition}
+  @override
   final Offset localPosition;
 
   /// A delta offset from the point where the long press drag initially contacted
@@ -176,6 +200,15 @@ class LongPressMoveUpdateDetails {
   /// the screen to the point where the pointer is currently located (the
   /// present [localPosition]) when this callback is triggered.
   final Offset localOffsetFromOrigin;
+
+  @override
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+    super.debugFillProperties(properties);
+    properties.add(DiagnosticsProperty<Offset>('globalPosition', globalPosition));
+    properties.add(DiagnosticsProperty<Offset>('localPosition', localPosition));
+    properties.add(DiagnosticsProperty<Offset>('offsetFromOrigin', offsetFromOrigin));
+    properties.add(DiagnosticsProperty<Offset>('localOffsetFromOrigin', localOffsetFromOrigin));
+  }
 }
 
 /// Details for callbacks that use [GestureLongPressEndCallback].
@@ -185,7 +218,7 @@ class LongPressMoveUpdateDetails {
 ///  * [LongPressGestureRecognizer.onLongPressEnd], which uses [GestureLongPressEndCallback].
 ///  * [LongPressMoveUpdateDetails], the details for [GestureLongPressMoveUpdateCallback].
 ///  * [LongPressStartDetails], the details for [GestureLongPressStartCallback].
-class LongPressEndDetails {
+class LongPressEndDetails with Diagnosticable implements PositionedGestureDetails {
   /// Creates the details for a [GestureLongPressEndCallback].
   const LongPressEndDetails({
     this.globalPosition = Offset.zero,
@@ -193,16 +226,26 @@ class LongPressEndDetails {
     this.velocity = Velocity.zero,
   }) : localPosition = localPosition ?? globalPosition;
 
-  /// The global position at which the pointer lifted from the screen.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.globalPosition}
+  @override
   final Offset globalPosition;
 
-  /// The local position at which the pointer contacted the screen.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.localPosition}
+  @override
   final Offset localPosition;
 
   /// The pointer's velocity when it stopped contacting the screen.
   ///
   /// Defaults to zero if not specified in the constructor.
   final Velocity velocity;
+
+  @override
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+    super.debugFillProperties(properties);
+    properties.add(DiagnosticsProperty<Offset>('globalPosition', globalPosition));
+    properties.add(DiagnosticsProperty<Offset>('localPosition', localPosition));
+    properties.add(DiagnosticsProperty<Velocity>('velocity', velocity));
+  }
 }
 
 /// Recognizes when the user has pressed down at the same location for a long

packages/flutter/lib/src/gestures/multitap.dart

@@ -7,10 +7,13 @@ library;
 
 import 'dart:async';
 
+import 'package:flutter/foundation.dart';
+
 import 'arena.dart';
 import 'binding.dart';
 import 'constants.dart';
 import 'events.dart';
+import 'gesture_details.dart';
 import 'pointer_router.dart';
 import 'recognizer.dart';
 import 'tap.dart';
@@ -615,7 +618,7 @@ typedef GestureSerialTapDownCallback = void Function(SerialTapDownDetails detail
 ///
 ///  * [SerialTapGestureRecognizer], which passes this information to its
 ///    [SerialTapGestureRecognizer.onSerialTapDown] callback.
-class SerialTapDownDetails {
+class SerialTapDownDetails with Diagnosticable implements PositionedGestureDetails {
   /// Creates details for a [GestureSerialTapDownCallback].
   ///
   /// The `count` argument must be greater than zero.
@@ -628,10 +631,12 @@ class SerialTapDownDetails {
   }) : assert(count > 0),
        localPosition = localPosition ?? globalPosition;
 
-  /// The global position at which the pointer contacted the screen.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.globalPosition}
+  @override
   final Offset globalPosition;
 
-  /// The local position at which the pointer contacted the screen.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.localPosition}
+  @override
   final Offset localPosition;
 
   /// The kind of the device that initiated the event.
@@ -655,6 +660,16 @@ class SerialTapDownDetails {
   /// the two taps had too much distance between them), then this count will
   /// reset back to `1`, and a new series will have begun.
   final int count;
+
+  @override
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+    super.debugFillProperties(properties);
+    properties.add(DiagnosticsProperty<Offset>('globalPosition', globalPosition));
+    properties.add(DiagnosticsProperty<Offset>('localPosition', localPosition));
+    properties.add(EnumProperty<PointerDeviceKind>('kind', kind));
+    properties.add(IntProperty('buttons', buttons));
+    properties.add(IntProperty('count', count));
+  }
 }
 
 /// Signature used by [SerialTapGestureRecognizer.onSerialTapCancel] for when a
@@ -669,7 +684,7 @@ typedef GestureSerialTapCancelCallback = void Function(SerialTapCancelDetails de
 ///
 ///  * [SerialTapGestureRecognizer], which passes this information to its
 ///    [SerialTapGestureRecognizer.onSerialTapCancel] callback.
-class SerialTapCancelDetails {
+class SerialTapCancelDetails with Diagnosticable {
   /// Creates details for a [GestureSerialTapCancelCallback].
   ///
   /// The `count` argument must be greater than zero.
@@ -682,6 +697,12 @@ class SerialTapCancelDetails {
   /// [SerialTapDownDetails.count] for the tap that is being canceled. See
   /// that field for more information on how this count is reported.
   final int count;
+
+  @override
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+    super.debugFillProperties(properties);
+    properties.add(IntProperty('count', count));
+  }
 }
 
 /// Signature used by [SerialTapGestureRecognizer.onSerialTapUp] for when a
@@ -695,7 +716,7 @@ typedef GestureSerialTapUpCallback = void Function(SerialTapUpDetails details);
 ///
 ///  * [SerialTapGestureRecognizer], which passes this information to its
 ///    [SerialTapGestureRecognizer.onSerialTapUp] callback.
-class SerialTapUpDetails {
+class SerialTapUpDetails with Diagnosticable implements PositionedGestureDetails {
   /// Creates details for a [GestureSerialTapUpCallback].
   ///
   /// The `count` argument must be greater than zero.
@@ -707,10 +728,12 @@ class SerialTapUpDetails {
   }) : assert(count > 0),
        localPosition = localPosition ?? globalPosition;
 
-  /// The global position at which the pointer contacted the screen.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.globalPosition}
+  @override
   final Offset globalPosition;
 
-  /// The local position at which the pointer contacted the screen.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.localPosition}
+  @override
   final Offset localPosition;
 
   /// The kind of the device that initiated the event.
@@ -727,6 +750,15 @@ class SerialTapUpDetails {
   /// the two taps had too much distance between them), then this count will
   /// reset back to `1`, and a new series will have begun.
   final int count;
+
+  @override
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+    super.debugFillProperties(properties);
+    properties.add(DiagnosticsProperty<Offset>('globalPosition', globalPosition));
+    properties.add(DiagnosticsProperty<Offset>('localPosition', localPosition));
+    properties.add(EnumProperty<PointerDeviceKind?>('kind', kind));
+    properties.add(IntProperty('count', count));
+  }
 }
 
 /// Recognizes serial taps (taps in a series).

packages/flutter/lib/src/gestures/scale.dart

@@ -4,6 +4,8 @@
 
 import 'dart:math' as math;
 
+import 'package:flutter/foundation.dart';
+
 import 'constants.dart';
 import 'events.dart';
 import 'recognizer.dart';
@@ -92,7 +94,7 @@ class _PointerPanZoomData {
 }
 
 /// Details for [GestureScaleStartCallback].
-class ScaleStartDetails {
+class ScaleStartDetails with Diagnosticable {
   /// Creates details for [GestureScaleStartCallback].
   ScaleStartDetails({
     this.focalPoint = Offset.zero,
@@ -142,12 +144,17 @@ class ScaleStartDetails {
   final PointerDeviceKind? kind;
 
   @override
-  String toString() =>
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
-      'ScaleStartDetails(focalPoint: $focalPoint, localFocalPoint: $localFocalPoint, pointersCount: $pointerCount)';
+    super.debugFillProperties(properties);
+    properties.add(DiagnosticsProperty<Offset>('focalPoint', focalPoint));
+    properties.add(DiagnosticsProperty<Offset>('localFocalPoint', localFocalPoint));
+    properties.add(IntProperty('pointerCount', pointerCount));
+    properties.add(DiagnosticsProperty<Duration?>('sourceTimeStamp', sourceTimeStamp));
+  }
 }
 
 /// Details for [GestureScaleUpdateCallback].
-class ScaleUpdateDetails {
+class ScaleUpdateDetails with Diagnosticable {
   /// Creates details for [GestureScaleUpdateCallback].
   ///
   /// The [scale], [horizontalScale], and [verticalScale] arguments must be
@@ -247,21 +254,22 @@ class ScaleUpdateDetails {
   final Duration? sourceTimeStamp;
 
   @override
-  String toString() =>
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
-      'ScaleUpdateDetails('
+    super.debugFillProperties(properties);
-      'focalPoint: $focalPoint,'
+    properties.add(DiagnosticsProperty<Offset>('focalPointDelta', focalPointDelta));
-      ' localFocalPoint: $localFocalPoint,'
+    properties.add(DiagnosticsProperty<Offset>('focalPoint', focalPoint));
-      ' scale: $scale,'
+    properties.add(DiagnosticsProperty<Offset>('localFocalPoint', localFocalPoint));
-      ' horizontalScale: $horizontalScale,'
+    properties.add(DoubleProperty('scale', scale));
-      ' verticalScale: $verticalScale,'
+    properties.add(DoubleProperty('horizontalScale', horizontalScale));
-      ' rotation: $rotation,'
+    properties.add(DoubleProperty('verticalScale', verticalScale));
-      ' pointerCount: $pointerCount,'
+    properties.add(DoubleProperty('rotation', rotation));
-      ' focalPointDelta: $focalPointDelta,'
+    properties.add(IntProperty('pointerCount', pointerCount));
-      ' sourceTimeStamp: $sourceTimeStamp)';
+    properties.add(DiagnosticsProperty<Duration?>('sourceTimeStamp', sourceTimeStamp));
+  }
 }
 
 /// Details for [GestureScaleEndCallback].
-class ScaleEndDetails {
+class ScaleEndDetails with Diagnosticable {
   /// Creates details for [GestureScaleEndCallback].
   ScaleEndDetails({this.velocity = Velocity.zero, this.scaleVelocity = 0, this.pointerCount = 0});
 
@@ -278,8 +286,12 @@ class ScaleEndDetails {
   final int pointerCount;
 
   @override
-  String toString() =>
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
-      'ScaleEndDetails(velocity: $velocity, scaleVelocity: $scaleVelocity, pointerCount: $pointerCount)';
+    super.debugFillProperties(properties);
+    properties.add(DiagnosticsProperty<Velocity>('velocity', velocity));
+    properties.add(DoubleProperty('scaleVelocity', scaleVelocity));
+    properties.add(IntProperty('pointerCount', pointerCount));
+  }
 }
 
 /// Signature for when the pointers in contact with the screen have established

packages/flutter/lib/src/gestures/tap.dart

@@ -12,6 +12,7 @@ import 'package:flutter/foundation.dart';
 import 'arena.dart';
 import 'constants.dart';
 import 'events.dart';
+import 'gesture_details.dart';
 import 'recognizer.dart';
 
 export 'dart:ui' show Offset, PointerDeviceKind;
@@ -28,19 +29,29 @@ export 'events.dart' show PointerCancelEvent, PointerDownEvent, PointerEvent, Po
 ///
 ///  * [GestureDetector.onTapDown], which receives this information.
 ///  * [TapGestureRecognizer], which passes this information to one of its callbacks.
-class TapDownDetails {
+class TapDownDetails with Diagnosticable implements PositionedGestureDetails {
   /// Creates details for a [GestureTapDownCallback].
   TapDownDetails({this.globalPosition = Offset.zero, Offset? localPosition, this.kind})
     : localPosition = localPosition ?? globalPosition;
 
-  /// The global position at which the pointer contacted the screen.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.globalPosition}
+  @override
   final Offset globalPosition;
 
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.localPosition}
+  @override
+  final Offset localPosition;
+
   /// The kind of the device that initiated the event.
   final PointerDeviceKind? kind;
 
-  /// The local position at which the pointer contacted the screen.
+  @override
-  final Offset localPosition;
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+    super.debugFillProperties(properties);
+    properties.add(DiagnosticsProperty<Offset>('globalPosition', globalPosition));
+    properties.add(DiagnosticsProperty<Offset>('localPosition', localPosition));
+    properties.add(EnumProperty<PointerDeviceKind?>('kind', kind));
+  }
 }
 
 /// {@template flutter.gestures.tap.GestureTapDownCallback}
@@ -63,19 +74,29 @@ typedef GestureTapDownCallback = void Function(TapDownDetails details);
 ///
 ///  * [GestureDetector.onTapUp], which receives this information.
 ///  * [TapGestureRecognizer], which passes this information to one of its callbacks.
-class TapUpDetails {
+class TapUpDetails with Diagnosticable implements PositionedGestureDetails {
   /// Creates a [TapUpDetails] data object.
-  TapUpDetails({required this.kind, this.globalPosition = Offset.zero, Offset? localPosition})
+  TapUpDetails({this.globalPosition = Offset.zero, Offset? localPosition, required this.kind})
     : localPosition = localPosition ?? globalPosition;
 
-  /// The global position at which the pointer contacted the screen.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.globalPosition}
+  @override
   final Offset globalPosition;
 
-  /// The local position at which the pointer contacted the screen.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.localPosition}
+  @override
   final Offset localPosition;
 
   /// The kind of the device that initiated the event.
   final PointerDeviceKind kind;
+
+  @override
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+    super.debugFillProperties(properties);
+    properties.add(DiagnosticsProperty<Offset>('globalPosition', globalPosition));
+    properties.add(DiagnosticsProperty<Offset>('localPosition', localPosition));
+    properties.add(EnumProperty<PointerDeviceKind>('kind', kind));
+  }
 }
 
 /// Details object for callbacks that use [GestureTapMoveCallback].
@@ -400,7 +421,7 @@ abstract class BaseTapGestureRecognizer extends PrimaryPointerGestureRecognizer
         defaultValue: _up?.position,
       ),
     );
-    properties.add(DiagnosticsProperty<int>('button', _down?.buttons, defaultValue: null));
+    properties.add(IntProperty('button', _down?.buttons, defaultValue: null));
     properties.add(FlagProperty('sentTapDown', value: _sentTapDown, ifTrue: 'sent tap down'));
   }
 }

packages/flutter/lib/src/gestures/tap_and_drag.dart

@@ -13,6 +13,7 @@ import 'package:flutter/foundation.dart';
 
 import 'constants.dart';
 import 'events.dart';
+import 'gesture_details.dart';
 import 'monodrag.dart';
 import 'recognizer.dart';
 import 'scale.dart';
@@ -79,7 +80,7 @@ typedef GestureTapDragDownCallback = void Function(TapDragDownDetails details);
 ///  * [TapDragStartDetails], the details for [GestureTapDragStartCallback].
 ///  * [TapDragUpdateDetails], the details for [GestureTapDragUpdateCallback].
 ///  * [TapDragEndDetails], the details for [GestureTapDragEndCallback].
-class TapDragDownDetails with Diagnosticable {
+class TapDragDownDetails with Diagnosticable implements PositionedGestureDetails {
   /// Creates details for a [GestureTapDragDownCallback].
   TapDragDownDetails({
     required this.globalPosition,
@@ -88,10 +89,12 @@ class TapDragDownDetails with Diagnosticable {
     required this.consecutiveTapCount,
   });
 
-  /// The global position at which the pointer contacted the screen.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.globalPosition}
+  @override
   final Offset globalPosition;
 
-  /// The local position at which the pointer contacted the screen.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.localPosition}
+  @override
   final Offset localPosition;
 
   /// The kind of the device that initiated the event.
@@ -106,8 +109,8 @@ class TapDragDownDetails with Diagnosticable {
     super.debugFillProperties(properties);
     properties.add(DiagnosticsProperty<Offset>('globalPosition', globalPosition));
     properties.add(DiagnosticsProperty<Offset>('localPosition', localPosition));
-    properties.add(DiagnosticsProperty<PointerDeviceKind?>('kind', kind));
+    properties.add(EnumProperty<PointerDeviceKind?>('kind', kind));
-    properties.add(DiagnosticsProperty<int>('consecutiveTapCount', consecutiveTapCount));
+    properties.add(IntProperty('consecutiveTapCount', consecutiveTapCount));
   }
 }
 
@@ -130,19 +133,21 @@ typedef GestureTapDragUpCallback = void Function(TapDragUpDetails details);
 ///  * [TapDragStartDetails], the details for [GestureTapDragStartCallback].
 ///  * [TapDragUpdateDetails], the details for [GestureTapDragUpdateCallback].
 ///  * [TapDragEndDetails], the details for [GestureTapDragEndCallback].
-class TapDragUpDetails with Diagnosticable {
+class TapDragUpDetails with Diagnosticable implements PositionedGestureDetails {
   /// Creates details for a [GestureTapDragUpCallback].
   TapDragUpDetails({
-    required this.kind,
     required this.globalPosition,
     required this.localPosition,
+    required this.kind,
     required this.consecutiveTapCount,
   });
 
-  /// The global position at which the pointer contacted the screen.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.globalPosition}
+  @override
   final Offset globalPosition;
 
-  /// The local position at which the pointer contacted the screen.
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.localPosition}
+  @override
   final Offset localPosition;
 
   /// The kind of the device that initiated the event.
@@ -157,8 +162,8 @@ class TapDragUpDetails with Diagnosticable {
     super.debugFillProperties(properties);
     properties.add(DiagnosticsProperty<Offset>('globalPosition', globalPosition));
     properties.add(DiagnosticsProperty<Offset>('localPosition', localPosition));
-    properties.add(DiagnosticsProperty<PointerDeviceKind?>('kind', kind));
+    properties.add(EnumProperty<PointerDeviceKind?>('kind', kind));
-    properties.add(DiagnosticsProperty<int>('consecutiveTapCount', consecutiveTapCount));
+    properties.add(IntProperty('consecutiveTapCount', consecutiveTapCount));
   }
 }
 
@@ -181,34 +186,30 @@ typedef GestureTapDragStartCallback = void Function(TapDragStartDetails details)
 ///  * [TapDragUpDetails], the details for [GestureTapDragUpCallback].
 ///  * [TapDragUpdateDetails], the details for [GestureTapDragUpdateCallback].
 ///  * [TapDragEndDetails], the details for [GestureTapDragEndCallback].
-class TapDragStartDetails with Diagnosticable {
+class TapDragStartDetails with Diagnosticable implements PositionedGestureDetails {
   /// Creates details for a [GestureTapDragStartCallback].
   TapDragStartDetails({
-    this.sourceTimeStamp,
     required this.globalPosition,
     required this.localPosition,
+    this.sourceTimeStamp,
     this.kind,
     required this.consecutiveTapCount,
   });
 
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.globalPosition}
+  @override
+  final Offset globalPosition;
+
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.localPosition}
+  @override
+  final Offset localPosition;
+
   /// Recorded timestamp of the source pointer event that triggered the drag
   /// event.
   ///
   /// Could be null if triggered from proxied events such as accessibility.
   final Duration? sourceTimeStamp;
 
-  /// The global position at which the pointer contacted the screen.
-  ///
-  /// See also:
-  ///
-  ///  * [localPosition], which is the [globalPosition] transformed to the
-  ///    coordinate space of the event receiver.
-  final Offset globalPosition;
-
-  /// The local position in the coordinate system of the event receiver at
-  /// which the pointer contacted the screen.
-  final Offset localPosition;
-
   /// The kind of the device that initiated the event.
   final PointerDeviceKind? kind;
 
@@ -219,11 +220,11 @@ class TapDragStartDetails with Diagnosticable {
   @override
   void debugFillProperties(DiagnosticPropertiesBuilder properties) {
     super.debugFillProperties(properties);
-    properties.add(DiagnosticsProperty<Duration?>('sourceTimeStamp', sourceTimeStamp));
     properties.add(DiagnosticsProperty<Offset>('globalPosition', globalPosition));
     properties.add(DiagnosticsProperty<Offset>('localPosition', localPosition));
-    properties.add(DiagnosticsProperty<PointerDeviceKind?>('kind', kind));
+    properties.add(DiagnosticsProperty<Duration?>('sourceTimeStamp', sourceTimeStamp));
-    properties.add(DiagnosticsProperty<int>('consecutiveTapCount', consecutiveTapCount));
+    properties.add(EnumProperty<PointerDeviceKind?>('kind', kind));
+    properties.add(IntProperty('consecutiveTapCount', consecutiveTapCount));
   }
 }
 
@@ -246,18 +247,18 @@ typedef GestureTapDragUpdateCallback = void Function(TapDragUpdateDetails detail
 ///  * [TapDragUpDetails], the details for [GestureTapDragUpCallback].
 ///  * [TapDragStartDetails], the details for [GestureTapDragStartCallback].
 ///  * [TapDragEndDetails], the details for [GestureTapDragEndCallback].
-class TapDragUpdateDetails with Diagnosticable {
+class TapDragUpdateDetails with Diagnosticable implements PositionedGestureDetails {
   /// Creates details for a [GestureTapDragUpdateCallback].
   ///
   /// If [primaryDelta] is non-null, then its value must match one of the
   /// coordinates of [delta] and the other coordinate must be zero.
   TapDragUpdateDetails({
+    required this.globalPosition,
+    required this.localPosition,
     this.sourceTimeStamp,
     this.delta = Offset.zero,
     this.primaryDelta,
-    required this.globalPosition,
     this.kind,
-    required this.localPosition,
     required this.offsetFromOrigin,
     required this.localOffsetFromOrigin,
     required this.consecutiveTapCount,
@@ -267,6 +268,14 @@ class TapDragUpdateDetails with Diagnosticable {
              (primaryDelta == delta.dy && delta.dx == 0.0),
        );
 
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.globalPosition}
+  @override
+  final Offset globalPosition;
+
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.localPosition}
+  @override
+  final Offset localPosition;
+
   /// Recorded timestamp of the source pointer event that triggered the drag
   /// event.
   ///
@@ -296,20 +305,6 @@ class TapDragUpdateDetails with Diagnosticable {
   /// Defaults to null if not specified in the constructor.
   final double? primaryDelta;
 
-  /// The pointer's global position when it triggered this update.
-  ///
-  /// See also:
-  ///
-  ///  * [localPosition], which is the [globalPosition] transformed to the
-  ///    coordinate space of the event receiver.
-  final Offset globalPosition;
-
-  /// The local position in the coordinate system of the event receiver at
-  /// which the pointer contacted the screen.
-  ///
-  /// Defaults to [globalPosition] if not specified in the constructor.
-  final Offset localPosition;
-
   /// The kind of the device that initiated the event.
   final PointerDeviceKind? kind;
 
@@ -336,15 +331,15 @@ class TapDragUpdateDetails with Diagnosticable {
   @override
   void debugFillProperties(DiagnosticPropertiesBuilder properties) {
     super.debugFillProperties(properties);
-    properties.add(DiagnosticsProperty<Duration?>('sourceTimeStamp', sourceTimeStamp));
-    properties.add(DiagnosticsProperty<Offset>('delta', delta));
-    properties.add(DiagnosticsProperty<double?>('primaryDelta', primaryDelta));
     properties.add(DiagnosticsProperty<Offset>('globalPosition', globalPosition));
     properties.add(DiagnosticsProperty<Offset>('localPosition', localPosition));
-    properties.add(DiagnosticsProperty<PointerDeviceKind?>('kind', kind));
+    properties.add(DiagnosticsProperty<Duration?>('sourceTimeStamp', sourceTimeStamp));
+    properties.add(DiagnosticsProperty<Offset>('delta', delta));
+    properties.add(DoubleProperty('primaryDelta', primaryDelta));
+    properties.add(EnumProperty<PointerDeviceKind?>('kind', kind));
     properties.add(DiagnosticsProperty<Offset>('offsetFromOrigin', offsetFromOrigin));
     properties.add(DiagnosticsProperty<Offset>('localOffsetFromOrigin', localOffsetFromOrigin));
-    properties.add(DiagnosticsProperty<int>('consecutiveTapCount', consecutiveTapCount));
+    properties.add(IntProperty('consecutiveTapCount', consecutiveTapCount));
   }
 }
 
@@ -367,14 +362,14 @@ typedef GestureTapDragEndCallback = void Function(TapDragEndDetails endDetails);
 ///  * [TapDragUpDetails], the details for [GestureTapDragUpCallback].
 ///  * [TapDragStartDetails], the details for [GestureTapDragStartCallback].
 ///  * [TapDragUpdateDetails], the details for [GestureTapDragUpdateCallback].
-class TapDragEndDetails with Diagnosticable {
+class TapDragEndDetails with Diagnosticable implements PositionedGestureDetails {
   /// Creates details for a [GestureTapDragEndCallback].
   TapDragEndDetails({
+    this.globalPosition = Offset.zero,
+    Offset? localPosition,
     this.velocity = Velocity.zero,
     this.primaryVelocity,
     required this.consecutiveTapCount,
-    this.globalPosition = Offset.zero,
-    Offset? localPosition,
   }) : assert(
          primaryVelocity == null ||
              primaryVelocity == velocity.pixelsPerSecond.dx ||
@@ -382,6 +377,14 @@ class TapDragEndDetails with Diagnosticable {
        ),
        localPosition = localPosition ?? globalPosition;
 
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.globalPosition}
+  @override
+  final Offset globalPosition;
+
+  /// {@macro flutter.gestures.gesturedetails.PositionedGestureDetails.localPosition}
+  @override
+  final Offset localPosition;
+
   /// The velocity the pointer was moving when it stopped contacting the screen.
   ///
   /// Defaults to zero if not specified in the constructor.
@@ -403,28 +406,14 @@ class TapDragEndDetails with Diagnosticable {
   /// the number in the series this tap is.
   final int consecutiveTapCount;
 
-  /// The global position at which the pointer lifted from the screen.
-  ///
-  /// See also:
-  ///
-  ///  * [localPosition], which is the [globalPosition] transformed to the
-  ///    coordinate space of the event receiver.
-  final Offset globalPosition;
-
-  /// The local position in the coordinate system of the event receiver at which
-  /// the pointer lifted from the screen.
-  ///
-  /// Defaults to [globalPosition] if not specified in the constructor.
-  final Offset localPosition;
-
   @override
   void debugFillProperties(DiagnosticPropertiesBuilder properties) {
     super.debugFillProperties(properties);
-    properties.add(DiagnosticsProperty<Velocity>('velocity', velocity));
-    properties.add(DiagnosticsProperty<double?>('primaryVelocity', primaryVelocity));
-    properties.add(DiagnosticsProperty<int>('consecutiveTapCount', consecutiveTapCount));
     properties.add(DiagnosticsProperty<Offset>('globalPosition', globalPosition));
     properties.add(DiagnosticsProperty<Offset>('localPosition', localPosition));
+    properties.add(DiagnosticsProperty<Velocity>('velocity', velocity));
+    properties.add(DoubleProperty('primaryVelocity', primaryVelocity));
+    properties.add(IntProperty('consecutiveTapCount', consecutiveTapCount));
   }
 }
 
@@ -1464,12 +1453,12 @@ class TapAndPanGestureRecognizer extends BaseTapAndDragGestureRecognizer {
   String get debugDescription => 'tap and pan';
 }
 
+/// {@macro flutter.gestures.selectionrecognizers.TapAndPanGestureRecognizer}
 @Deprecated(
   'Use TapAndPanGestureRecognizer instead. '
   'TapAndPanGestureRecognizer works exactly the same but has a more disambiguated name from BaseTapAndDragGestureRecognizer. '
   'This feature was deprecated after v3.9.0-19.0.pre.',
 )
-/// {@macro flutter.gestures.selectionrecognizers.TapAndPanGestureRecognizer}
 class TapAndDragGestureRecognizer extends BaseTapAndDragGestureRecognizer {
   /// Create a gesture recognizer for interactions on a plane.
   @Deprecated(

packages/flutter/test/gestures/debug_test.dart

@@ -223,4 +223,224 @@ void main() {
     GestureBinding.instance.gestureArena.close(1);
     tap.dispose();
   });
+
+  test('Gesture details debugFillProperties', () {
+    final List<(Diagnosticable, List<String>)> pairs = <(Diagnosticable, List<String>)>[
+      (
+        DragDownDetails(),
+        <String>['globalPosition: Offset(0.0, 0.0)', 'localPosition: Offset(0.0, 0.0)'],
+      ),
+      (
+        DragStartDetails(),
+        <String>[
+          'globalPosition: Offset(0.0, 0.0)',
+          'localPosition: Offset(0.0, 0.0)',
+          'sourceTimeStamp: null',
+          'kind: null',
+        ],
+      ),
+      (
+        DragUpdateDetails(globalPosition: Offset.zero),
+        <String>[
+          'globalPosition: Offset(0.0, 0.0)',
+          'localPosition: Offset(0.0, 0.0)',
+          'sourceTimeStamp: null',
+          'delta: Offset(0.0, 0.0)',
+          'primaryDelta: null',
+        ],
+      ),
+      (
+        DragEndDetails(),
+        <String>[
+          'globalPosition: Offset(0.0, 0.0)',
+          'localPosition: Offset(0.0, 0.0)',
+          'velocity: Velocity(0.0, 0.0)',
+          'primaryVelocity: null',
+        ],
+      ),
+      (
+        ForcePressDetails(globalPosition: Offset.zero, pressure: 1.0),
+        <String>[
+          'globalPosition: Offset(0.0, 0.0)',
+          'localPosition: Offset(0.0, 0.0)',
+          'pressure: 1.0',
+        ],
+      ),
+      (
+        const LongPressDownDetails(),
+        <String>[
+          'globalPosition: Offset(0.0, 0.0)',
+          'localPosition: Offset(0.0, 0.0)',
+          'kind: null',
+        ],
+      ),
+      (
+        const LongPressStartDetails(),
+        <String>['globalPosition: Offset(0.0, 0.0)', 'localPosition: Offset(0.0, 0.0)'],
+      ),
+      (
+        const LongPressMoveUpdateDetails(),
+        <String>[
+          'globalPosition: Offset(0.0, 0.0)',
+          'localPosition: Offset(0.0, 0.0)',
+          'offsetFromOrigin: Offset(0.0, 0.0)',
+          'localOffsetFromOrigin: Offset(0.0, 0.0)',
+        ],
+      ),
+      (
+        const LongPressEndDetails(),
+        <String>[
+          'globalPosition: Offset(0.0, 0.0)',
+          'localPosition: Offset(0.0, 0.0)',
+          'velocity: Velocity(0.0, 0.0)',
+        ],
+      ),
+      (
+        SerialTapDownDetails(kind: PointerDeviceKind.unknown),
+        <String>[
+          'globalPosition: Offset(0.0, 0.0)',
+          'localPosition: Offset(0.0, 0.0)',
+          'kind: unknown',
+          'buttons: 0',
+          'count: 1',
+        ],
+      ),
+      (SerialTapCancelDetails(), <String>['count: 1']),
+      (
+        SerialTapUpDetails(),
+        <String>[
+          'globalPosition: Offset(0.0, 0.0)',
+          'localPosition: Offset(0.0, 0.0)',
+          'kind: null',
+          'count: 1',
+        ],
+      ),
+      (
+        ScaleStartDetails(),
+        <String>[
+          'focalPoint: Offset(0.0, 0.0)',
+          'localFocalPoint: Offset(0.0, 0.0)',
+          'pointerCount: 0',
+          'sourceTimeStamp: null',
+        ],
+      ),
+      (
+        ScaleUpdateDetails(),
+        <String>[
+          'focalPointDelta: Offset(0.0, 0.0)',
+          'focalPoint: Offset(0.0, 0.0)',
+          'localFocalPoint: Offset(0.0, 0.0)',
+          'scale: 1.0',
+          'horizontalScale: 1.0',
+          'verticalScale: 1.0',
+          'rotation: 0.0',
+          'pointerCount: 0',
+          'sourceTimeStamp: null',
+        ],
+      ),
+      (
+        ScaleEndDetails(),
+        <String>['velocity: Velocity(0.0, 0.0)', 'scaleVelocity: 0.0', 'pointerCount: 0'],
+      ),
+      (
+        TapDownDetails(kind: PointerDeviceKind.unknown),
+        <String>[
+          'globalPosition: Offset(0.0, 0.0)',
+          'localPosition: Offset(0.0, 0.0)',
+          'kind: unknown',
+        ],
+      ),
+      (
+        TapUpDetails(kind: PointerDeviceKind.unknown),
+        <String>[
+          'globalPosition: Offset(0.0, 0.0)',
+          'localPosition: Offset(0.0, 0.0)',
+          'kind: unknown',
+        ],
+      ),
+      (
+        TapDragDownDetails(
+          globalPosition: Offset.zero,
+          localPosition: Offset.zero,
+          consecutiveTapCount: 1,
+        ),
+        <String>[
+          'globalPosition: Offset(0.0, 0.0)',
+          'localPosition: Offset(0.0, 0.0)',
+          'kind: null',
+          'consecutiveTapCount: 1',
+        ],
+      ),
+      (
+        TapDragUpDetails(
+          globalPosition: Offset.zero,
+          localPosition: Offset.zero,
+          kind: PointerDeviceKind.unknown,
+          consecutiveTapCount: 1,
+        ),
+        <String>[
+          'globalPosition: Offset(0.0, 0.0)',
+          'localPosition: Offset(0.0, 0.0)',
+          'kind: unknown',
+          'consecutiveTapCount: 1',
+        ],
+      ),
+      (
+        TapDragStartDetails(
+          globalPosition: Offset.zero,
+          localPosition: Offset.zero,
+          consecutiveTapCount: 1,
+        ),
+        <String>[
+          'globalPosition: Offset(0.0, 0.0)',
+          'localPosition: Offset(0.0, 0.0)',
+          'sourceTimeStamp: null',
+          'kind: null',
+          'consecutiveTapCount: 1',
+        ],
+      ),
+      (
+        TapDragUpdateDetails(
+          globalPosition: Offset.zero,
+          localPosition: Offset.zero,
+          offsetFromOrigin: Offset.zero,
+          localOffsetFromOrigin: Offset.zero,
+          consecutiveTapCount: 1,
+        ),
+        <String>[
+          'globalPosition: Offset(0.0, 0.0)',
+          'localPosition: Offset(0.0, 0.0)',
+          'sourceTimeStamp: null',
+          'delta: Offset(0.0, 0.0)',
+          'primaryDelta: null',
+          'kind: null',
+          'offsetFromOrigin: Offset(0.0, 0.0)',
+          'localOffsetFromOrigin: Offset(0.0, 0.0)',
+          'consecutiveTapCount: 1',
+        ],
+      ),
+      (
+        TapDragEndDetails(consecutiveTapCount: 1),
+        <String>[
+          'globalPosition: Offset(0.0, 0.0)',
+          'localPosition: Offset(0.0, 0.0)',
+          'velocity: Velocity(0.0, 0.0)',
+          'primaryVelocity: null',
+          'consecutiveTapCount: 1',
+        ],
+      ),
+    ];
+
+    for (final (Diagnosticable detail, List<String> expected) in pairs) {
+      final DiagnosticPropertiesBuilder builder = DiagnosticPropertiesBuilder();
+      // ignore: invalid_use_of_protected_member
+      detail.debugFillProperties(builder);
+      final List<String> description =
+          builder.properties
+              .where((DiagnosticsNode node) => !node.isFiltered(DiagnosticLevel.info))
+              .map((DiagnosticsNode node) => node.toString())
+              .toList();
+      expect(description, expected);
+    }
+  });
 }