Scale, RedirectPointer

.vscode/settings.json

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+{
+    "dart.flutterSdkPath": "C:\\Users\\ping\\.puro\\envs\\beta\\flutter",
+    "dart.sdkPath": "C:\\Users\\ping\\.puro\\envs\\beta\\flutter\\bin\\cache\\dart-sdk"
+}

boxy/lib/redirect_pointer.dart

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+export 'package:boxy/redirect_pointer.dart';

boxy/lib/scale.dart

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+export 'src/scale.dart';

boxy/lib/src/redirect_pointer.dart

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+import 'package:flutter/cupertino.dart';
+import 'package:flutter/rendering.dart';
+
+class RedirectPointer extends SingleChildRenderObjectWidget {
+  const RedirectPointer({
+    super.key,
+    super.child,
+    this.above = const [],
+    this.below = const [],
+  });
+
+  final List<GlobalKey> below;
+  final List<GlobalKey> above;
+
+  @override
+  RenderRedirectPointer createRenderObject(BuildContext context) {
+    return RenderRedirectPointer(below: below, above: above);
+  }
+
+  @override
+  void updateRenderObject(
+    BuildContext context,
+    RenderRedirectPointer renderObject,
+  ) {
+    renderObject
+      ..below = below
+      ..above = above;
+  }
+}
+
+class RenderRedirectPointer extends RenderProxyBox {
+  RenderRedirectPointer({
+    RenderBox? child,
+    this.below = const [],
+    this.above = const [],
+  }) : super(child);
+
+  List<GlobalKey> below;
+  List<GlobalKey> above;
+
+  @override
+  bool hitTestChildren(BoxHitTestResult result, {required Offset position}) {
+    for (final key in above.reversed) {
+      final child = key.currentContext?.findRenderObject() as RenderBox?;
+      if (child != null) {
+        final hit = result.addWithPaintTransform(
+          transform: child.getTransformTo(this),
+          position: position,
+          hitTest: (result, position) {
+            return child.hitTest(result, position: position);
+          },
+        );
+        if (hit) {
+          return true;
+        }
+      }
+    }
+    if (super.hitTestChildren(result, position: position)) {
+      return true;
+    }
+    for (final key in below.reversed) {
+      final child = key.currentContext?.findRenderObject() as RenderBox?;
+      if (child != null) {
+        final hit = result.addWithPaintTransform(
+          transform: child.getTransformTo(this),
+          position: position,
+          hitTest: (result, position) {
+            return child.hitTest(result, position: position);
+          },
+        );
+        if (hit) {
+          return true;
+        }
+      }
+    }
+    return false;
+  }
+}

boxy/lib/src/scale.dart

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+import 'package:flutter/material.dart';
+
+import '../boxy.dart';
+
+class Scale extends StatelessWidget {
+  const Scale({
+    super.key,
+    required this.child,
+    required this.scale,
+  });
+
+  final Widget child;
+  final double scale;
+
+  @override
+  Widget build(BuildContext context) {
+    return CustomBoxy(
+      delegate: _ScaleBoxy(scale),
+      children: [child],
+    );
+  }
+}
+
+class _ScaleBoxy extends BoxyDelegate {
+  _ScaleBoxy(this.scale);
+
+  final double scale;
+
+  @override
+  bool shouldRelayout(_ScaleBoxy oldDelegate) => scale != oldDelegate.scale;
+
+  @override
+  Size layout() {
+    final child = children.single;
+    if (scale == 0 || !scale.isFinite) {
+      child.layout(BoxConstraints.tight(Size.zero));
+      return Size.zero;
+    }
+    child.setTransform(Matrix4.identity()..scale(scale));
+    return child.layout(constraints / scale) * scale;
+  }
+}