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The `theme` parameter of `Preview(...)` allows for developers to provide a callback that returns a `PreviewThemeData` instance which can contain theming data for Material and Cupertino widgets in both light and dark modes. The provided theme data will be injected into the widget tree and applied to the previewed widget. The `brightness` parameter allows for developers to specify an initial brightness setting (e.g., light vs dark mode) for the previewed widget. If not provided, the current system default is used. A new button has also been added to each widget preview card that allows for toggling between light and dark mode for individual previews. **Demo:** https://github.com/user-attachments/assets/f0a4a3bc-25d2-49b0-a5f6-9149eccfc1d4 Fixes https://github.com/flutter/flutter/issues/166436 Fixes https://github.com/flutter/flutter/issues/166275 Fixes https://github.com/flutter/flutter/issues/166279 Fixes https://github.com/flutter/flutter/issues/166437
Flutter Gallery
NOTE: The Flutter Gallery is now deprecated, and no longer being active maintained.
Flutter Gallery was a resource to help developers evaluate and use Flutter. It is now being used primarily for testing. For posterity, the web version remains hosted here.
We recommend Flutter developers check out the following resources:
-
Wonderous (web demo, App Store, Google Play, source code):
A Flutter app that showcases Flutter's support for elegant design and rich animations. -
Material 3 Demo (web demo, source code):
A Flutter app that showcases Material 3 features in the Flutter Material library. -
Flutter Samples (samples, source code):
A collection of open source samples that illustrate best practices for Flutter. -
Widget catalogs (Material, Cupertino):
Catalogs for Material, Cupertino, and other widgets available for use in UI.