35 lines
1.1 KiB
Dart
35 lines
1.1 KiB
Dart
import 'package:flutter/material.dart';
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// https://github.com/flutter/flutter/issues/63946#issuecomment-1000442747
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// - By: https://github.com/PaulBout1
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class AllwaysScrollableFixedPositionScrollPhysics extends ScrollPhysics {
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const AllwaysScrollableFixedPositionScrollPhysics({ScrollPhysics? parent})
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: super(parent: parent);
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@override
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AllwaysScrollableFixedPositionScrollPhysics applyTo(ScrollPhysics? ancestor) {
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return AllwaysScrollableFixedPositionScrollPhysics(parent: buildParent(ancestor));
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}
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@override
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double adjustPositionForNewDimensions({
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required ScrollMetrics oldPosition,
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required ScrollMetrics newPosition,
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required bool isScrolling,
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required double velocity,
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}) {
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if (newPosition.extentBefore == 0) {
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return super.adjustPositionForNewDimensions(
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oldPosition: oldPosition,
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newPosition: newPosition,
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isScrolling: isScrolling,
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velocity: velocity,
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);
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}
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return newPosition.maxScrollExtent - oldPosition.extentAfter;
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}
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@override
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bool shouldAcceptUserOffset(ScrollMetrics position) => true;
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} |