InkWell uses MaterialStateMouseCursor and defaults to clickable (#58448)

* Adds support for material state mouse cursor to InkWell and InkResponse
* Set their default cursors to be MaterialStateMouseCursor.clickable.

packages/flutter/lib/src/material/ink_well.dart

@@ -13,6 +13,7 @@ import 'debug.dart';
 import 'feedback.dart';
 import 'ink_highlight.dart';
 import 'material.dart';
+import 'material_state.dart';
 import 'theme.dart';
 
 /// An ink feature that displays a [color] "splash" in response to a user
@@ -296,7 +297,7 @@ class InkResponse extends StatelessWidget {
     this.onLongPress,
     this.onHighlightChanged,
     this.onHover,
-    this.mouseCursor = MouseCursor.defer,
+    this.mouseCursor,
     this.containedInkWell = false,
     this.highlightShape = BoxShape.circle,
     this.radius,
@@ -313,8 +314,7 @@ class InkResponse extends StatelessWidget {
     this.canRequestFocus = true,
     this.onFocusChange,
     this.autofocus = false,
-  }) : assert(mouseCursor != null),
-       assert(containedInkWell != null),
+  }) : assert(containedInkWell != null),
        assert(highlightShape != null),
        assert(enableFeedback != null),
        assert(excludeFromSemantics != null),
@@ -367,8 +367,17 @@ class InkResponse extends StatelessWidget {
   /// The cursor for a mouse pointer when it enters or is hovering over the
   /// widget.
   ///
-  /// The [cursor] defaults to [MouseCursor.defer], deferring the choice of
-  /// cursor to the next region behing it in hit-test order.
+  /// If [mouseCursor] is a [MaterialStateProperty<MouseCursor>],
+  /// [MaterialStateProperty.resolve] is used for the following [MaterialState]s:
+  ///
+  ///  * [MaterialState.hovered].
+  ///  * [MaterialState.focused].
+  ///  * [MaterialState.disabled].
+  ///
+  /// When [value] is null and [tristate] is true, [MaterialState.selected] is
+  /// included as a state.
+  ///
+  /// If this property is null, [MaterialStateMouseCursor.clickable] will be used.
   final MouseCursor mouseCursor;
 
   /// Whether this ink response should be clipped its bounds.
@@ -601,7 +610,7 @@ class _InkResponseStateWidget extends StatefulWidget {
     this.onLongPress,
     this.onHighlightChanged,
     this.onHover,
-    this.mouseCursor = MouseCursor.defer,
+    this.mouseCursor,
     this.containedInkWell = false,
     this.highlightShape = BoxShape.circle,
     this.radius,
@@ -626,8 +635,7 @@ class _InkResponseStateWidget extends StatefulWidget {
        assert(enableFeedback != null),
        assert(excludeFromSemantics != null),
        assert(autofocus != null),
-       assert(canRequestFocus != null),
-       assert(mouseCursor != null);
+       assert(canRequestFocus != null);
 
   final Widget child;
   final GestureTapCallback onTap;
@@ -672,7 +680,7 @@ class _InkResponseStateWidget extends StatefulWidget {
       if (onTapCancel != null) 'tap cancel',
     ];
     properties.add(IterableProperty<String>('gestures', gestures, ifEmpty: '<none>'));
-    properties.add(DiagnosticsProperty<MouseCursor>('mouseCursor', mouseCursor, defaultValue: MouseCursor.defer));
+    properties.add(DiagnosticsProperty<MouseCursor>('mouseCursor', mouseCursor));
     properties.add(DiagnosticsProperty<bool>('containedInkWell', containedInkWell, level: DiagnosticLevel.fine));
     properties.add(DiagnosticsProperty<BoxShape>(
       'highlightShape',
@@ -1025,6 +1033,14 @@ class _InkResponseState extends State<_InkResponseStateWidget>
       _highlights[type]?.color = getHighlightColorForType(type);
     }
     _currentSplash?.color = widget.splashColor ?? Theme.of(context).splashColor;
+    final MouseCursor effectiveMouseCursor = MaterialStateProperty.resolveAs<MouseCursor>(
+      widget.mouseCursor ?? MaterialStateMouseCursor.clickable,
+      <MaterialState>{
+        if (!enabled) MaterialState.disabled,
+        if (_hovering) MaterialState.hovered,
+        if (_hasFocus) MaterialState.focused,
+      },
+    );
     return _ParentInkResponseProvider(
       state: this,
       child: Actions(
@@ -1035,7 +1051,7 @@ class _InkResponseState extends State<_InkResponseStateWidget>
           onFocusChange: _handleFocusUpdate,
           autofocus: widget.autofocus,
           child: MouseRegion(
-            cursor: widget.mouseCursor,
+            cursor: effectiveMouseCursor,
             onEnter: enabled ? _handleMouseEnter : null,
             onExit: enabled ? _handleMouseExit : null,
             child: GestureDetector(
@@ -1160,7 +1176,7 @@ class InkWell extends InkResponse {
     GestureTapCancelCallback onTapCancel,
     ValueChanged<bool> onHighlightChanged,
     ValueChanged<bool> onHover,
-    MouseCursor mouseCursor = MouseCursor.defer,
+    MouseCursor mouseCursor,
     Color focusColor,
     Color hoverColor,
     Color highlightColor,

packages/flutter/test/material/ink_well_test.dart

@@ -227,7 +227,22 @@ void main() {
       ),
     );
 
-    expect(RendererBinding.instance.mouseTracker.debugDeviceActiveCursor(1), SystemMouseCursors.forbidden);
+    expect(RendererBinding.instance.mouseTracker.debugDeviceActiveCursor(1), SystemMouseCursors.click);
+
+    // Test disabled
+    await tester.pumpWidget(
+      const Material(
+        child: Directionality(
+          textDirection: TextDirection.ltr,
+          child: MouseRegion(
+            cursor: SystemMouseCursors.forbidden,
+            child: InkWell(),
+          ),
+        ),
+      ),
+    );
+
+    expect(RendererBinding.instance.mouseTracker.debugDeviceActiveCursor(1), SystemMouseCursors.basic);
 
     // Test default of InkResponse()
     await tester.pumpWidget(
@@ -244,7 +259,22 @@ void main() {
       ),
     );
 
-    expect(RendererBinding.instance.mouseTracker.debugDeviceActiveCursor(1), SystemMouseCursors.forbidden);
+    expect(RendererBinding.instance.mouseTracker.debugDeviceActiveCursor(1), SystemMouseCursors.click);
+
+    // Test disabled
+    await tester.pumpWidget(
+      const Material(
+        child: Directionality(
+          textDirection: TextDirection.ltr,
+          child: MouseRegion(
+            cursor: SystemMouseCursors.forbidden,
+            child: InkResponse(),
+          ),
+        ),
+      ),
+    );
+
+    expect(RendererBinding.instance.mouseTracker.debugDeviceActiveCursor(1), SystemMouseCursors.basic);
   });
 
   group('feedback', () {