43 lines
995 B
Dart
43 lines
995 B
Dart
import 'package:flutter/material.dart';
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class ViewModelBuilder<T extends ValueNotifier> extends StatefulWidget {
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final T Function() create;
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final Widget Function(BuildContext context, T viewModel, Widget? child)
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builder;
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final Widget? child;
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const ViewModelBuilder({
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super.key,
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required this.create,
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required this.builder,
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this.child,
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});
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@override
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State<ViewModelBuilder<T>> createState() => _ViewModelBuilderState<T>();
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}
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class _ViewModelBuilderState<T extends ValueNotifier>
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extends State<ViewModelBuilder<T>> {
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late final T _viewModel;
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@override
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void initState() {
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_viewModel = widget.create();
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super.initState();
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}
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@override
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void dispose() {
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_viewModel.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return ValueListenableBuilder(
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valueListenable: _viewModel,
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builder: (context, value, child) =>
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widget.builder.call(context, _viewModel, child),
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);
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}
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}
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