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34 lines
697 B
Dart
34 lines
697 B
Dart
4 years ago
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import 'dart:math';
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import 'package:flutter/cupertino.dart';
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class SliverAppBarDelegate extends SliverPersistentHeaderDelegate {
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SliverAppBarDelegate({
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@required this.minHeight,
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@required this.maxHeight,
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@required this.child,
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});
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final double minHeight;
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final double maxHeight;
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final Widget child;
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@override
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double get minExtent => minHeight;
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@override
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double get maxExtent => max(maxHeight, minHeight);
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@override
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Widget build(
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BuildContext context,
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double shrinkOffset,
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bool overlapsContent)
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{
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return new SizedBox.expand(child: child);
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}
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@override
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bool shouldRebuild(SliverAppBarDelegate oldDelegate) {
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return false;
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}
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}
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