SnapshotPainter should dispatch creation and disposal events. (#138810)
diff --git a/packages/flutter/lib/src/widgets/snapshot_widget.dart b/packages/flutter/lib/src/widgets/snapshot_widget.dart
index c680d58..193616f 100644
--- a/packages/flutter/lib/src/widgets/snapshot_widget.dart
+++ b/packages/flutter/lib/src/widgets/snapshot_widget.dart
@@ -4,6 +4,7 @@
import 'dart:ui' as ui;
+import 'package:flutter/foundation.dart';
import 'package:flutter/rendering.dart';
import 'basic.dart';
@@ -385,7 +386,14 @@
/// }
/// ```
/// {@end-tool}
-abstract class SnapshotPainter extends ChangeNotifier {
+abstract class SnapshotPainter extends ChangeNotifier {
+ /// Creates an instance of [SnapshotPainter].
+ SnapshotPainter() {
+ if (kFlutterMemoryAllocationsEnabled) {
+ ChangeNotifier.maybeDispatchObjectCreation(this);
+ }
+ }
+
/// Called whenever the [image] that represents a [SnapshotWidget]s child should be painted.
///
/// The image is rasterized at the physical pixel resolution and should be scaled down by
diff --git a/packages/flutter/test/widgets/snapshot_widget_test.dart b/packages/flutter/test/widgets/snapshot_widget_test.dart
index 7bc8cd7..7d6df8b 100644
--- a/packages/flutter/test/widgets/snapshot_widget_test.dart
+++ b/packages/flutter/test/widgets/snapshot_widget_test.dart
@@ -326,6 +326,16 @@
await expectLater(find.byKey(repaintBoundaryKey), matchesReferenceImage(imageWhenDisabled));
},
skip: kIsWeb); // TODO(jonahwilliams): https://github.com/flutter/flutter/issues/106689
+
+ test('SnapshotPainter dispatches memory events', () async {
+ await expectLater(
+ await memoryEvents(
+ () => TestPainter().dispose(),
+ TestPainter,
+ ),
+ areCreateAndDispose,
+ );
+ });
}
class TestPlatformView extends SingleChildRenderObjectWidget {
