The purpose od this project is learn about (provider)[https://pub.dev/packages/provider] with dependency injection and state management.
This project has three usages of provider:
your usage is to inject simply a dependency of a object.
declaration in (main.dart)[lib/main.dart] and watch in (produto_widget)[lib/provider/produto_widget.dart] and (provider_page)[lib/provider/provider_page.dart]
your usage is to has reactivity of change notifier with dependency injection of provider, and can has methods to make thinks.
declaration in (main.dart)[lib/main.dart] and (provider controller)[lib/change_notifier/provider_controller.dart] and watch in (change notifier page)[lib/change_notifier/change_notifier_page.dart]
The purpose of that is to easyly declare in main.dart the many providers simply and readable
declaration is in (main.dart)[lib/main.dart]
to watch values has simply use context.read<ProviderController>() and has (selector)[https://pub.dev/documentation/provider/latest/provider/Selector-class.html] to get limited quantity of values without need rebuild every any time.
has the usage of context.watch<UserModel>(); to watch a value .
has the usage of (Tuple package)[https://pub.dev/packages/tuple] to get multiples selectors, without need every