51 lines
1.4 KiB
Dart
51 lines
1.4 KiB
Dart
import 'package:wonders/common_libs.dart';
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class PopRouterOnOverScroll extends StatefulWidget {
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const PopRouterOnOverScroll({super.key, required this.child, required this.controller});
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final ScrollController controller;
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final Widget child;
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@override
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State<PopRouterOnOverScroll> createState() => _PopRouterOnOverScrollState();
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}
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class _PopRouterOnOverScrollState extends State<PopRouterOnOverScroll> {
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final _scrollToPopThreshold = 70;
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bool _isPointerDown = false;
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@override
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void initState() {
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super.initState();
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widget.controller.addListener(_handleScrollChanged);
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}
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@override
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void didUpdateWidget(covariant PopRouterOnOverScroll oldWidget) {
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if (widget.controller != oldWidget.controller) {
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widget.controller.addListener(_handleScrollChanged);
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}
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super.didUpdateWidget(oldWidget);
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}
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bool _checkPointerIsDown(d) => _isPointerDown = d.dragDetails != null;
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@override
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Widget build(BuildContext context) {
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return NotificationListener<ScrollUpdateNotification>(
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onNotification: _checkPointerIsDown,
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child: widget.child,
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);
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}
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void _handleScrollChanged() {
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// If user pulls far down on the elastic list, pop back to
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final px = widget.controller.position.pixels;
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if (px < -_scrollToPopThreshold) {
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if (_isPointerDown) {
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context.pop();
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widget.controller.removeListener(_handleScrollChanged);
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}
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}
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}
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}
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