105 lines
3.0 KiB
Dart
105 lines
3.0 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:flutter_lucide/flutter_lucide.dart';
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import '../../core/theme/app_colors.dart';
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import '../../core/theme/app_spacing.dart';
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import '../../core/theme/app_typography.dart';
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import 'credits_badge.dart';
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/// Top navigation bar - matches Pencil topNav
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class TopNavBar extends StatelessWidget implements PreferredSizeWidget {
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const TopNavBar({
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super.key,
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required this.title,
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this.credits,
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this.showBackButton = false,
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this.onBack,
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this.onCreditsTap,
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this.backgroundColor = AppColors.surface,
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this.foregroundColor,
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});
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final String title;
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final String? credits;
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final bool showBackButton;
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final VoidCallback? onBack;
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final VoidCallback? onCreditsTap;
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/// 例如全屏背景页上叠半透明导航栏时用 [Colors.transparent]
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final Color backgroundColor;
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/// 标题与返回键颜色；默认 [AppColors.textPrimary]
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final Color? foregroundColor;
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@override
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Size get preferredSize => const Size.fromHeight(56);
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@override
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Widget build(BuildContext context) {
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final fg = foregroundColor ?? AppColors.textPrimary;
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final titleStyle = foregroundColor != null
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? AppTypography.navTitle.copyWith(color: foregroundColor)
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: AppTypography.navTitle;
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return Container(
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height: 56,
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padding: const EdgeInsets.symmetric(horizontal: AppSpacing.screenPadding),
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decoration: BoxDecoration(
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color: backgroundColor,
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boxShadow: backgroundColor.a < 0.02
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? null
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: const [
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BoxShadow(
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color: AppColors.shadowLight,
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blurRadius: 8,
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offset: Offset(0, 2),
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),
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],
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),
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child: Row(
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children: [
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if (showBackButton)
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GestureDetector(
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onTap: onBack ?? () => Navigator.of(context).pop(),
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behavior: HitTestBehavior.opaque,
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child: SizedBox(
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width: 40,
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height: 40,
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child: Center(
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child: Icon(
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LucideIcons.arrow_left,
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size: 24,
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color: fg,
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),
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),
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),
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),
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Expanded(
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child: showBackButton
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? Center(
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child: Text(
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title,
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style: titleStyle,
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),
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)
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: Align(
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alignment: Alignment.centerLeft,
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child: Text(
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title,
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style: titleStyle,
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),
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),
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),
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if (credits != null)
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CreditsBadge(
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credits: credits!,
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onTap: onCreditsTap,
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foregroundColor: foregroundColor,
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capsuleColor:
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foregroundColor?.withValues(alpha: 0.22),
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)
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else
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const SizedBox(width: 40),
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],
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),
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);
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}
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}
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