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Description:

flame riverpod

flame_riverpod #
Riverpod is a reactive caching and data-binding
framework for Dart & Flutter.
In flutter_riverpod, widgets can be configured to rebuild when the state
of a provider changes.
When using Flame, we are interacting with components, which are not Widgets.
flame_riverpod provides the RiverpodAwareGameWidget, RiverpodGameMixin, and
RiverpodComponentMixin to facilitate managing state from Providers in your Flame Game.
Usage #
You should use the RiverpodAwareGameWidget as your Flame GameWidget, the RiverpodGameMixin
mixin on your game that extends FlameGame, and the RiverpodComponentMixin on any components
interacting with Riverpod providers.
The full range of operations defined in Riverpod's WidgetRef definition are accessible from
components.
Subscriptions to a provider are managed in accordance with the lifecycle
of a Flame Component: initialization occurs when a Component is mounted, and disposal
occurs when a Component is removed. By default, the RiverpodAwareGameWidget is rebuilt when
Riverpod-aware (i.e. using the RiverpodComponentMixin) components are mounted and when they are
removed.

/// An excerpt from the Example. Check it out!
class RefExampleGame extends FlameGame with RiverpodGameMixin {
@override
Future<void> onLoad() async {
await super.onLoad();
add(TextComponent(text: 'Flame'));
add(RiverpodAwareTextComponent());
}
}

class RiverpodAwareTextComponent extends PositionComponent
with RiverpodComponentMixin {
late TextComponent textComponent;
int currentValue = 0;

/// [onMount] should be used over [onLoad] to initialize subscriptions,
/// cancellation is handled for the user inside [onRemove],
/// which is only called if the [Component] was mounted.
///
/// [RiverpodComponentMixin.addToGameWidgetBuild] **must** be invoked in
/// your Component **before** [RiverpodComponentMixin.onMount] in order to
/// have the provided function invoked on
/// [RiverpodAwareGameWidgetState.build].
///
/// From `flame_riverpod` 5.0.0, [WidgetRef.watch], is also accessible from
/// components.
@override
void onMount() {
addToGameWidgetBuild(() {
ref.listen(countingStreamProvider, (p0, p1) {
if (p1.hasValue) {
currentValue = p1.value!;
textComponent.text = '$currentValue';
}
});
});
super.onMount();
add(textComponent = TextComponent(position: position + Vector2(0, 27)));
}
}

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Credits #
Mark Videon for the initial groundwork and implementation.