Platform views shouldn't receive pointer events when not laid out #172043

justinmc · 2025-07-11T23:53:00Z

This PR makes platform views ignore pointer events when they're not laid out.

Platform views register themselves for global pointer events when their RenderBox attaches:

flutter/packages/flutter/lib/src/rendering/platform_view.dart

Lines 370 to 380 in 9c626d9

    
           @override 
        
           void attach(PipelineOwner owner) { 
        
             super.attach(owner); 
        
             GestureBinding.instance.pointerRouter.addGlobalRoute(_handleGlobalPointerEvent); 
        
           } 
        
           @override 
        
           void detach() { 
        
             GestureBinding.instance.pointerRouter.removeGlobalRoute(_handleGlobalPointerEvent); 
        
             super.detach(); 
        
           }

But a RenderBox that is attached is not necessarily laid out. The problem in the issue seemed to be that a page was created offscreen (attached and not laid out), but it still received pointer events, and this caused errors with using size before layout.

This PR simply ignores pointer events when not laid out.

Fixes #83481

flutter-dashboard · 2025-07-11T23:53:03Z

It looks like this pull request may not have tests. Please make sure to add tests or get an explicit test exemption before merging.

If you are not sure if you need tests, consider this rule of thumb: the purpose of a test is to make sure someone doesn't accidentally revert the fix. Ask yourself, is there anything in your PR that you feel it is important we not accidentally revert back to how it was before your fix?

Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing.If you believe this PR qualifies for a test exemption, contact "@test-exemption-reviewer" in the #hackers channel in Discord (don't just cc them here, they won't see it!). The test exemption team is a small volunteer group, so all reviewers should feel empowered to ask for tests, without delegating that responsibility entirely to the test exemption group.

flutter-dashboard · 2025-07-12T00:06:01Z

This pull request has been changed to a draft. The currently pending flutter-gold status will not be able to resolve until a new commit is pushed or the change is marked ready for review again.

For more guidance, visit Writing a golden file test for package:flutter.

Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing.

dkwingsmt

LGTM

…id out (flutter/flutter#172043)

flutter/flutter@9c626d9...440713c 2025-07-18 stuartmorgan@google.com Add OS version support section to plugin docs (flutter/flutter#172316) 2025-07-18 engine-flutter-autoroll@skia.org Roll Dart SDK from 7fcc5f48c335 to fe2232bd5b9f (2 revisions) (flutter/flutter#172339) 2025-07-18 robert.ancell@canonical.com Refactor handling of frame waiting. (flutter/flutter#172277) 2025-07-18 137456488+flutter-pub-roller-bot@users.noreply.github.com Roll pub packages (flutter/flutter#172332) 2025-07-17 matanlurey@users.noreply.github.com Refactor and forbid `base/exit.dart` outside of `lib/runner.dart` (flutter/flutter#171923) 2025-07-17 matanlurey@users.noreply.github.com Use UTC timezone for `stamp_command_test` to avoid local TZ flakes (flutter/flutter#172319) 2025-07-17 1961493+harryterkelsen@users.noreply.github.com [web] Add tests for unified platform view embedding behavior (flutter/flutter#172313) 2025-07-17 jmccandless@google.com Platform views shouldn't receive pointer events when not laid out (flutter/flutter#172043) 2025-07-17 ahmedsameha1@gmail.com Fix Size.isEmpty description (flutter/flutter#172021) 2025-07-17 iamtoricool@gmail.com feat: Add `maxCount` parameter to `Badge.count` constructor. (flutter/flutter#171054) 2025-07-17 31859944+LongCatIsLooong@users.noreply.github.com add `debugPaintTextLayoutBoxes` for debugging text layout (flutter/flutter#168876) 2025-07-17 engine-flutter-autoroll@skia.org Roll Packages from 4a231ae to cb8fef6 (31 revisions) (flutter/flutter#172303) 2025-07-17 jmccandless@google.com Fix mutating Paint bug (flutter/flutter#171180) 2025-07-17 jmccandless@google.com No SystemContextMenu when readOnly is true (flutter/flutter#171242) 2025-07-17 muhammad.mohiuddin@live.com Add a getter to get the recorder used by painting context (flutter/flutter#170223) 2025-07-17 jason-simmons@users.noreply.github.com [Impeller] Add missing SetPipeline call for the vertices uber pipeline in AtlasContents (flutter/flutter#172273) 2025-07-17 engine-flutter-autoroll@skia.org Roll Dart SDK from 486f9c0663bc to 7fcc5f48c335 (1 revision) (flutter/flutter#172279) 2025-07-17 engine-flutter-autoroll@skia.org Roll Skia from 3673a1f26a63 to 9587301e33bc (3 revisions) (flutter/flutter#172281) 2025-07-17 jason-simmons@users.noreply.github.com Fix a race in FlutterEngineTest.CanLogToStdout (flutter/flutter#172025) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-packages Please CC bmparr@google.com,stuartmorgan@google.com on the revert to ensure that a human is aware of the problem. To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

…utter#172043) This PR makes platform views ignore pointer events when they're not laid out. Platform views register themselves for global pointer events when their RenderBox attaches: https://github.com/flutter/flutter/blob/9c626d9f9afa6da96433e3bfc4895492f87e0009/packages/flutter/lib/src/rendering/platform_view.dart#L370-L380 But a RenderBox that is attached is not necessarily laid out. The problem in the issue seemed to be that a page was created offscreen (attached and not laid out), but it still received pointer events, and this caused errors with using `size` before layout. This PR simply ignores pointer events when not laid out. Fixes flutter#83481

…r#9646) flutter/flutter@9c626d9...440713c 2025-07-18 stuartmorgan@google.com Add OS version support section to plugin docs (flutter/flutter#172316) 2025-07-18 engine-flutter-autoroll@skia.org Roll Dart SDK from 7fcc5f48c335 to fe2232bd5b9f (2 revisions) (flutter/flutter#172339) 2025-07-18 robert.ancell@canonical.com Refactor handling of frame waiting. (flutter/flutter#172277) 2025-07-18 137456488+flutter-pub-roller-bot@users.noreply.github.com Roll pub packages (flutter/flutter#172332) 2025-07-17 matanlurey@users.noreply.github.com Refactor and forbid `base/exit.dart` outside of `lib/runner.dart` (flutter/flutter#171923) 2025-07-17 matanlurey@users.noreply.github.com Use UTC timezone for `stamp_command_test` to avoid local TZ flakes (flutter/flutter#172319) 2025-07-17 1961493+harryterkelsen@users.noreply.github.com [web] Add tests for unified platform view embedding behavior (flutter/flutter#172313) 2025-07-17 jmccandless@google.com Platform views shouldn't receive pointer events when not laid out (flutter/flutter#172043) 2025-07-17 ahmedsameha1@gmail.com Fix Size.isEmpty description (flutter/flutter#172021) 2025-07-17 iamtoricool@gmail.com feat: Add `maxCount` parameter to `Badge.count` constructor. (flutter/flutter#171054) 2025-07-17 31859944+LongCatIsLooong@users.noreply.github.com add `debugPaintTextLayoutBoxes` for debugging text layout (flutter/flutter#168876) 2025-07-17 engine-flutter-autoroll@skia.org Roll Packages from 4a231ae to cb8fef6 (31 revisions) (flutter/flutter#172303) 2025-07-17 jmccandless@google.com Fix mutating Paint bug (flutter/flutter#171180) 2025-07-17 jmccandless@google.com No SystemContextMenu when readOnly is true (flutter/flutter#171242) 2025-07-17 muhammad.mohiuddin@live.com Add a getter to get the recorder used by painting context (flutter/flutter#170223) 2025-07-17 jason-simmons@users.noreply.github.com [Impeller] Add missing SetPipeline call for the vertices uber pipeline in AtlasContents (flutter/flutter#172273) 2025-07-17 engine-flutter-autoroll@skia.org Roll Dart SDK from 486f9c0663bc to 7fcc5f48c335 (1 revision) (flutter/flutter#172279) 2025-07-17 engine-flutter-autoroll@skia.org Roll Skia from 3673a1f26a63 to 9587301e33bc (3 revisions) (flutter/flutter#172281) 2025-07-17 jason-simmons@users.noreply.github.com Fix a race in FlutterEngineTest.CanLogToStdout (flutter/flutter#172025) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-packages Please CC bmparr@google.com,stuartmorgan@google.com on the revert to ensure that a human is aware of the problem. To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

…utter#172043) This PR makes platform views ignore pointer events when they're not laid out. Platform views register themselves for global pointer events when their RenderBox attaches: https://github.com/flutter/flutter/blob/9c626d9f9afa6da96433e3bfc4895492f87e0009/packages/flutter/lib/src/rendering/platform_view.dart#L370-L380 But a RenderBox that is attached is not necessarily laid out. The problem in the issue seemed to be that a page was created offscreen (attached and not laid out), but it still received pointer events, and this caused errors with using `size` before layout. This PR simply ignores pointer events when not laid out. Fixes flutter#83481

Dont receive pointer events when not laid out

9877857

justinmc self-assigned this Jul 11, 2025

github-actions bot added the framework flutter/packages/flutter repository. See also f: labels. label Jul 11, 2025

justinmc mentioned this pull request Jul 12, 2025

RenderUiKitView _handleGlobalPointerEvent is not checking for null size #83481

Closed

justinmc marked this pull request as draft July 12, 2025 00:04

justinmc force-pushed the platform-view-not-laid-out branch from 0bb6ca1 to e4e2bbd Compare July 17, 2025 18:26

justinmc marked this pull request as ready for review July 17, 2025 18:28

Tests

969d92b

justinmc force-pushed the platform-view-not-laid-out branch from e4e2bbd to 969d92b Compare July 17, 2025 18:35

dkwingsmt approved these changes Jul 17, 2025

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justinmc added the autosubmit Merge PR when tree becomes green via auto submit App label Jul 17, 2025

auto-submit bot added this pull request to the merge queue Jul 17, 2025

Merged via the queue into flutter:master with commit e244168 Jul 17, 2025
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flutter-dashboard bot removed the autosubmit Merge PR when tree becomes green via auto submit App label Jul 17, 2025

justinmc deleted the platform-view-not-laid-out branch July 17, 2025 22:27

engine-flutter-autoroll mentioned this pull request Jul 18, 2025

Roll Flutter from 9c626d9f9afa to 440713c3b287 (19 revisions) flutter/packages#9646

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engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Jul 18, 2025

e24416832 Platform views shouldn't receive pointer events when not la…

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…id out (flutter/flutter#172043)

Piinks mentioned this pull request Jul 19, 2025

Flutter Notable Commits - 2025 #161460

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justinmc commented Jul 11, 2025 •

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	@override
	void attach(PipelineOwner owner) {
	super.attach(owner);
	GestureBinding.instance.pointerRouter.addGlobalRoute(_handleGlobalPointerEvent);
	}

	@override
	void detach() {
	GestureBinding.instance.pointerRouter.removeGlobalRoute(_handleGlobalPointerEvent);
	super.detach();
	}

Platform views shouldn't receive pointer events when not laid out #172043

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justinmc commented Jul 11, 2025 •

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