145 lines
4.0 KiB
Dart
145 lines
4.0 KiB
Dart
import 'package:fluent_ui/fluent_ui.dart' as fluent;
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import 'package:flutter/material.dart';
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/// Windows平台专用的标签页容器，使用Fluent UI的TabView样式
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/// 替代移动端的Scaffold + TabAppBar + TabBarView组合
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class WindowsTabPage extends StatefulWidget {
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final List<WindowsTabItem> tabs;
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final int initialIndex;
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final Widget? headerAction;
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final ValueChanged<int>? onTabChanged;
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const WindowsTabPage({
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Key? key,
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required this.tabs,
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this.initialIndex = 0,
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this.headerAction,
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this.onTabChanged,
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}) : super(key: key);
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@override
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State<WindowsTabPage> createState() => _WindowsTabPageState();
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}
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class _WindowsTabPageState extends State<WindowsTabPage> {
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late int _currentIndex;
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@override
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void initState() {
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super.initState();
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_currentIndex = widget.initialIndex;
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}
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@override
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Widget build(BuildContext context) {
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// 使用maybeOf避免没有FluentTheme祖先时抛出异常
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final fluentTheme =
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fluent.FluentTheme.maybeOf(context) ?? fluent.FluentThemeData();
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final materialTheme = Theme.of(context);
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final isDark = materialTheme.brightness == Brightness.dark;
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final tabBarBg = isDark ? const Color(0xff202020) : const Color(0xfff0f0f0);
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return Column(
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crossAxisAlignment: CrossAxisAlignment.stretch,
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children: [
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// Fluent 样式标签栏
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Container(
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color: tabBarBg,
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child: Row(
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children: [
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Expanded(
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child: SingleChildScrollView(
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scrollDirection: Axis.horizontal,
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child: Row(
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children: List.generate(widget.tabs.length, (i) {
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final selected = i == _currentIndex;
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return _TabButton(
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label: widget.tabs[i].label,
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selected: selected,
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onTap: () {
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setState(() => _currentIndex = i);
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widget.onTabChanged?.call(i);
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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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if (widget.headerAction != null)
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Padding(
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padding: const EdgeInsets.symmetric(horizontal: 4),
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child: widget.headerAction!,
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),
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],
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),
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),
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// 分隔线
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Divider(
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height: 1,
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thickness: 1,
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color: materialTheme.dividerColor,
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),
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// 内容区
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Expanded(
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child: IndexedStack(
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index: _currentIndex,
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children: widget.tabs.map((t) => t.body).toList(),
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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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class WindowsTabItem {
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final String label;
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final Widget body;
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const WindowsTabItem({required this.label, required this.body});
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}
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/// 单个标签按钮，Fluent Pivot样式
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class _TabButton extends StatelessWidget {
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final String label;
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final bool selected;
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final VoidCallback onTap;
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const _TabButton({
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required this.label,
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required this.selected,
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required this.onTap,
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});
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@override
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Widget build(BuildContext context) {
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final fluentTheme =
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fluent.FluentTheme.maybeOf(context) ?? fluent.FluentThemeData();
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final accent = fluentTheme.accentColor;
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final textColor = selected
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? accent
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: fluentTheme.resources.textFillColorSecondary;
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return GestureDetector(
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onTap: onTap,
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behavior: HitTestBehavior.opaque,
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child: Container(
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padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
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decoration: BoxDecoration(
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border: Border(
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bottom: BorderSide(
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color: selected ? accent : Colors.transparent,
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width: 2,
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),
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),
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),
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child: Text(
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label,
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style: TextStyle(
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fontSize: selected ? 18 : 15,
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fontWeight: selected ? FontWeight.bold : FontWeight.normal,
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color: textColor,
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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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