5401bb88b4
* Update `simplistic_editor` for Flutter 3.4 beta * Re-enable beta and master CI * Disable on master * Added sample code for using plugins and channels from background isolates. * goderbauer feedback 1 * goderbauer feedback2 * goderbauer feedback 3 * Add `background_isolate_channels` to CI * Enable beta CI * Enable all `stable` CI projects * `dart fix --apply` * `print` -> `denugPrint` * Make deps min version not pinned * Drop `_isDebug` * Remove unused import * `dart format` * Fixup `linting_tool` * Fixup `form_app` * Enable all `master` CI * Basic fixes * Patch `simplistic_editor` * Fix nl at eol * Comment out `simplistic_editor` * Incorporating @bleroux's latest changes * Clean up CI scripts * Copy `experimental/material_3_demo` to top level * Update `game_template` * Update `animations` * Update `desktop_photo_search` * Update `flutter_maps_firestore` * Update `form_app` * Update `infinite_list` * Update `isolate_example` * Update `jsonexample` * Update `navigation_and_routing` * Update `place_tracker` * Update `platform_channels` * Update `platform_design` * Update `provider_shopper` * Fixup `context_menus` * `dart format` * Update the main `material_3_demo` * Make `tool/flutter_ci_script_stable.sh` executable again Co-authored-by: Bruno Leroux <bruno.leroux@gmail.com> Co-authored-by: Aaron Clarke <aaclarke@google.com>
provider_shopper
A Flutter sample app that shows a state management approach using the Provider package. This is the app discussed in the Simple app state management section of flutter.dev.
Goals for this sample
- Show simple use of
Providerfor providing an immutable value to a subtree - Illustrate a simple state management approach using the ChangeNotifier class
- Show use of
ProxyProviderfor provided objects that depend on other provided objects
The important bits
lib/main.dart
Here the app sets up objects it needs to track state: a catalog and a shopping cart. It builds
a MultiProvider to provide both objects at once to widgets further down the tree.
The CartModel instance is provided using a ChangeNotifierProxyProvider, which combines
two types of functionality:
- It will automatically subscribe to changes in
CartModel(if you only want this functionality simply useChangeNotifierProvider). - It takes the value of a previously provided object (in this case,
CatalogModel, provided just above), and uses it to build the value ofCartModel(if you only want this functionality, simply useProxyProvider).
lib/models/*
This directory contains the model classes that are provided in main.dart. These classes
represent the app state.
lib/screens/*
This directory contains widgets used to construct the two screens of the app: the catalog and
the cart. These widgets have access to the current state of both the catalog and the cart
via Provider.of.
Questions/issues
If you have a general question about Provider, the best places to go are:
If you run into an issue with the sample itself, please file an issue in the main Flutter repo.