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Description:

flame bloc

Offers a simple and natural way to use flutter_bloc inside Flame.

flame_bloc 🔥🧱 #
flame_bloc offers a simple and natural (as in similar to flutter_bloc) way to use blocs and
cubits inside a FlameGame.
For a migration guide from the previous API to the current one,
check this article.
How to use #
Lets assume we have a bloc that handles player inventory, first we need to make it available to our
components.
We can do that by using FlameBlocProvider component:
class MyGame extends FlameGame {
@override
Future<void> onLoad() async {
await add(
FlameBlocProvider<PlayerInventoryBloc, PlayerInventoryState>(
create: () => PlayerInventoryBloc(),
children: [
Player(),
// ...
],
),
);
}
}
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With the above changes, the Player component will now have access to our bloc.
If more than one bloc needs to be provided, FlameMultiBlocProvider can be used in a similar fashion:
class MyGame extends FlameGame {
@override
Future<void> onLoad() async {
await add(
FlameMultiBlocProvider(
providers: [
FlameBlocProvider<PlayerInventoryBloc, PlayerInventoryState>(
create: () => PlayerInventoryBloc(),
),
FlameBlocProvider<PlayerStatsBloc, PlayerStatsState>(
create: () => PlayerStatsBloc(),
),
],
children: [
Player(),
// ...
],
),
);
}
}
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Listening to states changes at the component level can be done with two approaches:
By using FlameBlocListener component:
class Player extends PositionComponent {
@override
Future<void> onLoad() async {
await add(
FlameBlocListener<PlayerInventoryBloc, PlayerInventoryState>(
listener: (state) {
updateGear(state);
},
),
);
}
}
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Or by using FlameBlocListenable mixin:
class Player extends PositionComponent
with FlameBlocListenable<PlayerInventoryBloc, PlayerInventoryState> {

@override
void onNewState(state) {
updateGear(state);
}
}
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If all your component need is to simply access a bloc, the FlameBlocReader mixin can be applied
to a component:
class Player extends PositionComponent
with FlameBlocReader<PlayerStatsBloc, PlayerStatsState> {

void takeHit() {
bloc.add(const PlayerDamaged());
}
}
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Note that one limitation of the mixin is that it can access only a single bloc.
For a full example, check the example folder