mirror of
https://github.com/flutter/flutter.git
synced 2026-02-20 02:29:02 +08:00
e6a65afca4
Fixes: #160843 This PR adds edge behavior feature for traversing focus using arrow keys. This allows cycling through the focus within the `FocusScope` in a closed loop using the arrow keys. Which may be needed by TV application developers. Additionally, as in case #160843, `TraversalEdgeBehavior.parentScope` can be used to allow nested Navigators to traverse focus beyond the Navigator using arrow keys. ```dart MaterialApp( home: Column( children: <Widget>[ makeFocus(0), Navigator( onGenerateRoute: (RouteSettings settings) { return MaterialPageRoute<void>( traversalDirectionedEdgeBehavior: TraversalEdgeBehavior.parentScope, builder: (BuildContext context) { return Column( children: <Widget>[ makeFocus(1), makeFocus(2), ], ); }, ); }, ), makeFocus(3), ], ), ); ``` ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [x] I signed the [CLA]. - [x] I listed at least one issue that this PR fixes in the description above. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-new channel on [Discord]. <!-- Links --> [Contributor Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview [Tree Hygiene]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md [test-exempt]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests [Flutter Style Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md [Features we expect every widget to implement]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md [Data Driven Fixes]: https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md
Flutter
Flutter is a new way to build high-performance, cross-platform mobile, web, and desktop apps. Flutter is optimized for today's — and tomorrow's — mobile and desktop devices. We are focused on low-latency input and high frame rates on all platforms.
See the getting started guide for information about using Flutter.