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[material_ui] Migrate M3 BottomAppBar template to use new gen_defaults - #13385

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flutter:mainfrom
elliette:bottom-app-bar-migration-3
Oct 23, 2026
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auto-submit[bot] merged 2 commits into
flutter:mainfrom
elliette:bottom-app-bar-migration-3

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Work toward flutter/flutter#187899
Fixes flutter/flutter#188403

This PR migrates the M3 BottomAppBar defaults template to use the new gen_defaults in material_ui.

Pre-Review Checklist

Changelog/version exemption: No-op, pure migration.

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@flutter-dashboard flutter-dashboard Bot added the CICD Run CI/CD label Oct 22, 2026
@elliette
elliette requested a review from QuncCccccc October 22, 2026 17:02

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Code Review

This pull request migrates the generation of Material 3 BottomAppBar defaults to the token-based generator. It removes the hardcoded _BottomAppBarDefaultsM3 class from bottom_app_bar.dart and replaces it with a generated part file. Additionally, it introduces the BottomAppBarTemplateM3 template, enables its generation in gen_defaults.dart, and adds a test case in gen_defaults_test.dart to verify the generated output. There are no review comments, and I have no feedback to provide.

@github-actions github-actions Bot added p: material_ui triage-design Should be looked at in design triage labels Oct 22, 2026
@elliette elliette added override: no versioning needed Override the check requiring version bumps for most changes override: no changelog needed Override the check requiring CHANGELOG updates for most changes labels Oct 22, 2026

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LGTM. Thank you! We are almost done!!

@elliette elliette added the autosubmit Merge PR when tree becomes green via auto submit App label Oct 23, 2026
@auto-submit
auto-submit Bot merged commit b7ec2d0 into flutter:main Oct 23, 2026
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reginaldalfret pushed a commit to reginaldalfret/flutter that referenced this pull request Oct 26, 2026
flutter/packages@108dad0...23a05b6

2026-10-23 [email protected] [video_player] Fix crash regression
with async calls on iOS/macOS (flutter/packages#13383)
2026-10-23 [email protected] [material_ui] Migrate M3
SegmentedButton template to use new gen_defaults
(flutter/packages#13227)
2026-10-23 [email protected] [material_ui] Migrate M3 Slider
template to use new gen_defaults (flutter/packages#13195)
2026-10-23 [email protected] [material_ui]
Migrate M3 BottomAppBar template to use new gen_defaults
(flutter/packages#13385)

If this roll has caused a breakage, revert this CL and set the roller
to dry run mode using the controls here:
https://autoroll.skia.org/r/flutter-packages-flutter-autoroll
Please CC [email protected] on the revert to ensure that a
human
is aware of the problem.

To file a bug in Flutter:
https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
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Documentation for the AutoRoller is here:
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suryaKommana2662 pushed a commit to suryaKommana2662/flutter that referenced this pull request Oct 29, 2026
flutter/packages@108dad0...23a05b6

2026-10-23 [email protected] [video_player] Fix crash regression
with async calls on iOS/macOS (flutter/packages#13383)
2026-10-23 [email protected] [material_ui] Migrate M3
SegmentedButton template to use new gen_defaults
(flutter/packages#13227)
2026-10-23 [email protected] [material_ui] Migrate M3 Slider
template to use new gen_defaults (flutter/packages#13195)
2026-10-23 [email protected] [material_ui]
Migrate M3 BottomAppBar template to use new gen_defaults
(flutter/packages#13385)

If this roll has caused a breakage, revert this CL and set the roller
to dry run mode using the controls here:
https://autoroll.skia.org/r/flutter-packages-flutter-autoroll
Please CC [email protected] on the revert to ensure that a
human
is aware of the problem.

To file a bug in Flutter:
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
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bottom_app_bar_template.dart

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