136 lines
4.5 KiB
Dart
136 lines
4.5 KiB
Dart
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import 'dart:io' show Platform;
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import 'dart:math' as math;
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import 'dart:ui' show ImageFilter;
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import 'package:flutter/foundation.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import '../../../providers/appearance_provider.dart';
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import '../../../shared/theme/app_theme.dart';
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import '../../../shared/widgets/top_drag_area.dart';
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import '../../../shared/widgets/window_chrome.dart';
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import '../../../shared/widgets/window_controls.dart';
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const double _kDesktopTitleBarHeight = 38.0;
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class DetailNavBar extends ConsumerWidget {
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final ValueListenable<double> scrollProgress;
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final String title;
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final VoidCallback onBack;
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final Color chromeColor;
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const DetailNavBar({
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super.key,
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required this.scrollProgress,
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required this.title,
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required this.onBack,
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this.chromeColor = const Color(0xFF08090c),
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});
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@override
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Widget build(BuildContext context, WidgetRef ref) {
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final isDesktop = WindowChrome.isDesktop;
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final topPadding = isDesktop
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? _kDesktopTitleBarHeight
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: math.max(MediaQuery.paddingOf(context).top, _kDesktopTitleBarHeight);
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final tokens = context.appTokens;
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final headerMode =
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ref.watch(appearanceProvider).value?.headerMode ?? HeaderMode.frosted;
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final isFrosted = headerMode == HeaderMode.frosted;
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final navHeight = topPadding + 30;
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return Stack(
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children: [
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SizedBox(
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height: navHeight,
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width: double.infinity,
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child: ValueListenableBuilder<double>(
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valueListenable: scrollProgress,
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builder: (_, raw, _) {
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final p = raw.clamp(0.0, 1.0);
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if (isFrosted) {
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if (Platform.isAndroid && p < 0.05) {
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return const SizedBox.expand();
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}
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final maxSigma = Platform.isAndroid ? 10.0 : 18.0;
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return ClipRect(
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child: BackdropFilter(
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filter: ImageFilter.blur(
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sigmaX: p * maxSigma,
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sigmaY: p * maxSigma,
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),
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child: DecoratedBox(
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decoration: BoxDecoration(
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color: chromeColor.withValues(alpha: p * 0.7),
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border: Border(
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bottom: BorderSide(
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color: const Color(
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0xFFFFFFFF,
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).withValues(alpha: p * 0.08),
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width: 1,
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),
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),
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),
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),
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),
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);
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}
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return ColoredBox(color: chromeColor.withValues(alpha: p));
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},
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),
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),
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const Positioned.fill(child: TopDragArea(child: SizedBox.expand())),
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Positioned(
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top: isDesktop
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? tokens.chromeInset
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: MediaQuery.paddingOf(context).top,
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left: 0,
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right: 0,
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child: Row(
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children: [
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SizedBox(width: tokens.chromeInset),
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IconButton(
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icon: const Icon(
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Icons.arrow_back,
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color: Colors.white,
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size: 18,
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),
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onPressed: onBack,
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tooltip: '返回',
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constraints: const BoxConstraints(minWidth: 30, minHeight: 30),
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padding: const EdgeInsets.all(6),
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),
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const SizedBox(width: 4),
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Expanded(
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child: IgnorePointer(
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child: ValueListenableBuilder<double>(
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valueListenable: scrollProgress,
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builder: (_, p, child) {
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return Opacity(opacity: p.clamp(0.0, 1.0), child: child);
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},
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child: Text(
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title,
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style: const TextStyle(
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color: Colors.white,
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fontSize: 16,
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fontWeight: FontWeight.w600,
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),
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overflow: TextOverflow.ellipsis,
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),
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),
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),
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),
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const SizedBox(width: 4),
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if (isDesktop) const WindowControls.forDarkSurface(),
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SizedBox(width: tokens.chromeInset),
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],
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),
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),
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],
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);
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}
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}
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