Add SnackBarTheme #180001
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Add SnackBarTheme #180001
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This pull request introduces SnackBarTheme, a new InheritedTheme for customizing SnackBar widgets. The implementation follows the established pattern for theme widgets in Flutter, providing an of method that falls back to ThemeData.snackBarTheme for backward compatibility. The changes correctly update SnackBar and Scaffold to use the new theme. Documentation has been updated accordingly, and new tests have been added to verify that local SnackBarTheme properties are used and that widget-specific properties take precedence. The changes are well-executed and improve the consistency of theming in the Material library.
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QuncCccccc
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Dec 17, 2025
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| home: SnackBarTheme( |
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It seems it only works when SnackBarTheme wraps Scaffold. What if it's inside Scaffold? I think it's a bit rare to use SnackBarTheme to wrap a Scaffold like this. If that's the only use case, then I don't think it's necessary to add this class. We can directly use MaterialApp.theme.
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It is common for an app to have multiple Scaffold widgets (one per route for instance), some apps even rely on nested Scaffold.
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Manual roll Flutter from 57c3f8b to 6ff7f30 (83 revisions) Manual roll requested by stuartmorgan@google.com flutter/flutter@57c3f8b...6ff7f30 2025-12-23 engine-flutter-autoroll@skia.org Roll Packages from f28cf2e to 5e3a766 (3 revisions) (flutter/flutter#180232) 2025-12-23 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from CmFPyvSc-K8_WDd5p... to 5EgkVbjGVZmCFPdtR... (flutter/flutter#180230) 2025-12-23 engine-flutter-autoroll@skia.org Roll Skia from db7ec9a14905 to bdb147ae3040 (2 revisions) (flutter/flutter#180222) 2025-12-23 bruno.leroux@gmail.com Add SnackBarTheme (flutter/flutter#180001) 2025-12-23 engine-flutter-autoroll@skia.org Roll Skia from 0b1ba3920f1c to db7ec9a14905 (1 revision) (flutter/flutter#180219) 2025-12-23 engine-flutter-autoroll@skia.org Roll Dart SDK from 31e9f619e18a to 94b05f717ba3 (1 revision) (flutter/flutter#180216) 2025-12-23 engine-flutter-autoroll@skia.org Roll Skia from a3e4f7b9d5f3 to 0b1ba3920f1c (1 revision) (flutter/flutter#180214) 2025-12-23 engine-flutter-autoroll@skia.org Roll Skia from b8517d1e25f7 to a3e4f7b9d5f3 (2 revisions) (flutter/flutter#180211) 2025-12-23 dkwingsmt@users.noreply.github.com [Engine] iOS style blurring (flutter/flutter#175458) 2025-12-23 engine-flutter-autoroll@skia.org Roll Dart SDK from 2243e91acaf2 to 31e9f619e18a (1 revision) (flutter/flutter#180210) 2025-12-22 36861262+QuncCccccc@users.noreply.github.com Add error description for nbsp character(\u202f) (flutter/flutter#178895) 2025-12-22 engine-flutter-autoroll@skia.org Roll Skia from 98c01ea504d7 to b8517d1e25f7 (1 revision) (flutter/flutter#180207) 2025-12-22 116356835+AbdeMohlbi@users.noreply.github.com Small clean up in `LocalizationPlugin` (flutter/flutter#180053) 2025-12-22 engine-flutter-autoroll@skia.org Roll Skia from c5beca8fa90b to 98c01ea504d7 (2 revisions) (flutter/flutter#180202) 2025-12-22 engine-flutter-autoroll@skia.org Roll Dart SDK from cff33b09b24d to 2243e91acaf2 (1 revision) (flutter/flutter#180199) 2025-12-22 116356835+AbdeMohlbi@users.noreply.github.com Remove usages of Android's `AsyncTask` in favor of `java.util.concurrent` (flutter/flutter#180050) 2025-12-22 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from 18ZvfJB61p7Z8HAaC... to CmFPyvSc-K8_WDd5p... (flutter/flutter#180193) 2025-12-22 engine-flutter-autoroll@skia.org Roll Skia from 7b7083ed9d57 to c5beca8fa90b (5 revisions) (flutter/flutter#180187) 2025-12-22 engine-flutter-autoroll@skia.org Roll Dart SDK from 38812d17127d to cff33b09b24d (1 revision) (flutter/flutter#180185) 2025-12-22 engine-flutter-autoroll@skia.org Roll Skia from 0eef18a0e2e6 to 7b7083ed9d57 (1 revision) (flutter/flutter#180184) 2025-12-22 engine-flutter-autoroll@skia.org Roll Dart SDK from 66c8013acbff to 38812d17127d (1 revision) (flutter/flutter#180179) 2025-12-21 engine-flutter-autoroll@skia.org Roll Skia from 6fbc6c75b9bb to 0eef18a0e2e6 (2 revisions) (flutter/flutter#180176) 2025-12-21 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from kGnnY1-fTWwYAnk8e... to 18ZvfJB61p7Z8HAaC... (flutter/flutter#180173) 2025-12-21 engine-flutter-autoroll@skia.org Roll Skia from 1a4ca755288a to 6fbc6c75b9bb (1 revision) (flutter/flutter#180167) 2025-12-20 engine-flutter-autoroll@skia.org Roll Skia from 2ad7452bd9d1 to 1a4ca755288a (1 revision) (flutter/flutter#180160) 2025-12-20 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from oe10epXkqGnv21AbZ... to kGnnY1-fTWwYAnk8e... (flutter/flutter#180158) 2025-12-20 engine-flutter-autoroll@skia.org Roll Skia from b01ad49ea807 to 2ad7452bd9d1 (1 revision) (flutter/flutter#180155) 2025-12-20 engine-flutter-autoroll@skia.org Roll Dart SDK from 8fb1c0c0a8ae to 66c8013acbff (1 revision) (flutter/flutter#180154) 2025-12-20 737941+loic-sharma@users.noreply.github.com Remove unnecessary RadioGroup migration TODOs (flutter/flutter#180105) 2025-12-20 98614782+auto-submit[bot]@users.noreply.github.com Reverts "[reland] Unify canvas creation and Surface code in Skwasm and CanvasKit (#179473)" (flutter/flutter#180152) 2025-12-20 engine-flutter-autoroll@skia.org Roll Skia from 3cc7e81928f0 to b01ad49ea807 (1 revision) (flutter/flutter#180151) 2025-12-20 engine-flutter-autoroll@skia.org Roll Dart SDK from ac95c6e8a31d to 8fb1c0c0a8ae (1 revision) (flutter/flutter#180148) 2025-12-19 137456488+flutter-pub-roller-bot@users.noreply.github.com Roll pub packages (flutter/flutter#180146) 2025-12-19 engine-flutter-autoroll@skia.org Roll Skia from fa4434632ce6 to 3cc7e81928f0 (4 revisions) (flutter/flutter#180142) 2025-12-19 1961493+harryterkelsen@users.noreply.github.com [reland] Unify canvas creation and Surface code in Skwasm and CanvasKit (flutter/flutter#179473) 2025-12-19 engine-flutter-autoroll@skia.org Roll Skia from ae5dd72b3591 to fa4434632ce6 (2 revisions) (flutter/flutter#180136) 2025-12-19 45459898+RamonFarizel@users.noreply.github.com Semantics headingLeveldoc update (flutter/flutter#179999) 2025-12-19 matt.kosarek@canonical.com Fix an issue where the semantics announce event may be encoded as either an int32_t or an int64_t depending on its value (flutter/flutter#180071) 2025-12-19 bkonyi@google.com [ Web ] Pass `--enable-experimental-ffi` when compiling WASM tests (flutter/flutter#180127) 2025-12-19 engine-flutter-autoroll@skia.org Roll Dart SDK from cfc117d10d36 to ac95c6e8a31d (1 revision) (flutter/flutter#180130) 2025-12-19 58529443+srujzs@users.noreply.github.com Pass canaryFeatures to BuildSettings (flutter/flutter#180108) 2025-12-19 engine-flutter-autoroll@skia.org Roll Skia from fe2be289c9fe to ae5dd72b3591 (1 revision) (flutter/flutter#180129) 2025-12-19 engine-flutter-autoroll@skia.org Roll Packages from 6f392aa to f28cf2e (1 revision) (flutter/flutter#180124) 2025-12-19 94012149+richardexfo@users.noreply.github.com Set text input purpose and hints on Linux platform (flutter/flutter#180013) ...
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Description
This PR adds the
SnackBarThemesubclass of InheritedTheme. Similarly to other theme classes.Despite missing, this class was mentioned in flutter.dev/go/material-theme-system-updates:
"SnackBarTheme and SnackBarThemeData are conformant.. "
Related Issue
Fixes Missing SnackBarTheme
Tests
Adds 2 tests.