97 lines
2.4 KiB
Dart
97 lines
2.4 KiB
Dart
import 'package:flutter/material.dart';
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class ScrollOverBuilder extends StatefulWidget {
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final Widget Function(bool isOver) builder;
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const ScrollOverBuilder({
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super.key,
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required this.builder,
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});
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@override
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State<ScrollOverBuilder> createState() => _ScrollOverBuilderState();
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}
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class _ScrollOverBuilderState extends State<ScrollOverBuilder> {
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final isOverNotifier = ValueNotifier<bool>(false);
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@override
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void dispose() {
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isOverNotifier.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 NotificationListener<ScrollMetricsNotification>(
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onNotification: (scrollNotification) {
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isOverNotifier.value = scrollNotification.metrics.maxScrollExtent > 0;
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return true;
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},
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child: ValueListenableBuilder<bool>(
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valueListenable: isOverNotifier,
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builder: (_, isOver, __) {
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return widget.builder(isOver);
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},
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),
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);
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}
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}
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// class ProxiesActionsBuilder extends StatelessWidget {
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// final Widget? child;
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// final Widget Function(
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// ProxiesActionsState state,
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// Widget? child,
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// ) builder;
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//
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// const ProxiesActionsBuilder({
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// super.key,
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// required this.child,
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// required this.builder,
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// });
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//
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// @override
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// Widget build(BuildContext context) {
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// return Selector<AppState, ProxiesActionsState>(
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// selector: (_, appState) => ProxiesActionsState(
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// isCurrent: appState.currentLabel == "proxies",
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// hasProvider: appState.providers.isNotEmpty,
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// ),
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// builder: (_, state, child) => builder(state, child),
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// child: child,
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// );
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// }
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// }
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// class ActiveBuilder extends StatelessWidget {
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// final String label;
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// final StateAndChildWidgetBuilder<bool> builder;
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// final Widget? child;
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//
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// const ActiveBuilder({
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// super.key,
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// required this.label,
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// required this.builder,
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// required this.child,
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// });
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//
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// @override
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// Widget build(BuildContext context) {
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// return Selector<AppState, bool>(
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// selector: (_, appState) => appState.currentLabel == label,
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// builder: (_, state, child) {
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// return builder(
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// state,
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// child,
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// );
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// },
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// child: child,
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// );
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// }
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// }
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typedef StateWidgetBuilder<T> = Widget Function(T state);
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typedef StateAndChildWidgetBuilder<T> = Widget Function(T state, Widget? child);
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