admin1
102 lines
3.0 KiB
Dart
102 lines
3.0 KiB
Dart
import 'dart:io';
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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/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 '../theme/app_theme.dart';
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import 'window_chrome.dart';
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class ScrollFadeHeader extends ConsumerWidget {
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final ValueNotifier<double> scrollProgress;
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final List<Widget> actions;
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const ScrollFadeHeader({
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super.key,
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required this.scrollProgress,
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this.actions = const [],
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});
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@override
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Widget build(BuildContext context, WidgetRef ref) {
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final tokens = context.appTokens;
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final isDesktop = Platform.isMacOS || Platform.isWindows;
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final topPadding = isDesktop
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? tokens.titleBarHeight
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: math.max(MediaQuery.paddingOf(context).top, tokens.titleBarHeight);
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final overlayHeight = topPadding + 12;
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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 theme = Theme.of(context);
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final background = 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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final entryProgress = (p / 0.25).clamp(0.0, 1.0);
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final glassProgress =
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Curves.easeOutCubic.transform(entryProgress) * 0.42;
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return ClipRect(
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child: BackdropFilter(
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filter: ImageFilter.blur(
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sigmaX: glassProgress * 10,
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sigmaY: glassProgress * 10,
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),
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child: DecoratedBox(
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decoration: BoxDecoration(
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color: theme.colorScheme.surface.withValues(
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alpha: glassProgress * 0.88,
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),
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border: Border(
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bottom: BorderSide(
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color: theme.colorScheme.onSurface.withValues(
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alpha: glassProgress * 0.08,
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),
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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(
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color: theme.colorScheme.surface.withValues(alpha: p),
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);
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},
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);
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return SizedBox(
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height: overlayHeight,
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width: double.infinity,
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child: Stack(
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children: [
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Positioned.fill(child: IgnorePointer(child: background)),
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if (actions.isNotEmpty)
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Positioned(
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right: 0,
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top: tokens.chromeInset,
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height: WindowChrome.controlsHeight,
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child: Row(
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mainAxisSize: MainAxisSize.min,
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crossAxisAlignment: CrossAxisAlignment.center,
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children: [
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...actions,
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SizedBox(width: WindowChrome.reservedTrailingWidth(tokens)),
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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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}
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