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import 'package:flutter/material.dart'; | |
abstract class BlocBase { | |
void dispose(); | |
} | |
class BlocProvider<T extends BlocBase> extends StatefulWidget { | |
BlocProvider({ | |
Key key, | |
@required this.child, | |
@required this.bloc, | |
}) : super(key: key); | |
final T bloc; | |
final Widget child; | |
@override | |
_BlocProviderState<T> createState() => _BlocProviderState<T>(); | |
static T of<T extends BlocBase>(BuildContext context) { | |
final type = _typeOf<BlocProvider<T>>(); | |
BlocProvider<T> provider = context.ancestorWidgetOfExactType(type); | |
return provider.bloc; | |
} | |
static Type _typeOf<T>() => T; | |
} | |
class _BlocProviderState<T> extends State<BlocProvider<BlocBase>> { | |
@override | |
void dispose() { | |
widget.bloc.dispose(); | |
super.dispose(); | |
} | |
@override | |
Widget build(BuildContext context) { | |
return widget.child; | |
} | |
} |
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