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| // ignore_for_file: prefer_const_constructors_in_immutables
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
/// Provider封装类 方便数据初始化
class ProviderWidget<T extends ChangeNotifier> extends StatefulWidget {
final ValueWidgetBuilder<T> builder;
final T model;
final Widget? child;
final Function(T model)? onModelReady;
final bool autoDispose;
ProviderWidget({
Key? key,
required this.builder,
required this.model,
this.child,
this.onModelReady,
this.autoDispose = true,
}) : super(key: key);
_ProviderWidgetState<T> createState() => _ProviderWidgetState<T>();
}
class _ProviderWidgetState<T extends ChangeNotifier>
extends State<ProviderWidget<T>> {
late T model;
@override
void initState() {
model = widget.model;
widget.onModelReady?.call(model);
super.initState();
}
@override
void dispose() {
if (widget.autoDispose) model.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return ChangeNotifierProvider<T>.value(
value: model,
child: Consumer<T>(
builder: widget.builder,
child: widget.child,
),
);
}
}
class ProviderWidget2<A extends ChangeNotifier, B extends ChangeNotifier>
extends StatefulWidget {
final Widget Function(BuildContext context, A model1, B model2, Widget? child)
builder;
final A model1;
final B model2;
final Widget? child;
final Function(A model1, B model2)? onModelReady;
final bool autoDispose;
ProviderWidget2({
Key? key,
required this.builder,
required this.model1,
required this.model2,
this.child,
this.onModelReady,
this.autoDispose = true,
}) : super(key: key);
_ProviderWidgetState2<A, B> createState() => _ProviderWidgetState2<A, B>();
}
class _ProviderWidgetState2<A extends ChangeNotifier, B extends ChangeNotifier>
extends State<ProviderWidget2<A, B>> {
late A model1;
late B model2;
@override
void initState() {
model1 = widget.model1;
model2 = widget.model2;
widget.onModelReady?.call(model1, model2);
super.initState();
}
@override
void dispose() {
if (widget.autoDispose) {
model1.dispose();
model2.dispose();
}
super.dispose();
}
@override
Widget build(BuildContext context) {
return MultiProvider(
providers: [
ChangeNotifierProvider<A>.value(value: model1),
ChangeNotifierProvider<B>.value(value: model2),
],
child: Consumer2<A, B>(
builder: widget.builder,
child: widget.child,
));
}
}
|
