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statenotifier

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This commit is contained in:
Christien Rioux 2023-09-30 21:00:22 -04:00
parent 8f0b4aaba0
commit 7a49497620
15 changed files with 28 additions and 56 deletions
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26
lib/tools/external_stream_state.dart
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@ -1,26 +0,0 @@
import 'dart:async';
import 'package:flutter_riverpod/flutter_riverpod.dart';
// Caches a state value which can be changed from anywhere
// Creates a provider interface that notices when the value changes
class ExternalStreamState<T> {
ExternalStreamState(T initialState)
: currentState = initialState,
streamController = StreamController<T>.broadcast();
T currentState;
StreamController<T> streamController;
void add(T newState) {
currentState = newState;
streamController.add(newState);
}
AutoDisposeStreamProvider<T> provider() =>
AutoDisposeStreamProvider<T>((ref) async* {
if (await streamController.stream.isEmpty) {
yield currentState;
}
await for (final value in streamController.stream) {
yield value;
}
});
}

1
lib/tools/tools.dart
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@ -1,5 +1,4 @@
export 'animations.dart';
export 'external_stream_state.dart';
export 'loggy.dart';
export 'phono_byte.dart';
export 'radix_generator.dart';