generated from dellevin/template
326 lines
11 KiB
Dart
326 lines
11 KiB
Dart
import 'package:flutter/material.dart';
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/// 通用状态选择栏，支持 4 种样式
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/// 0: 胶囊滑块（默认）
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/// 1: 下划线
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/// 2: 芯片组
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/// 3: 下拉
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class StatusBarShell extends StatelessWidget {
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const StatusBarShell({
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super.key,
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required this.tabs,
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required this.currentIndex,
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required this.onChanged,
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this.style = 0,
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});
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final List<StatusBarTab> tabs;
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final int currentIndex;
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final ValueChanged<int> onChanged;
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final int style;
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@override
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Widget build(BuildContext context) {
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switch (style) {
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case 1:
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return _UnderlineBar(tabs: tabs, currentIndex: currentIndex, onChanged: onChanged);
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case 2:
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return _ChipBar(tabs: tabs, currentIndex: currentIndex, onChanged: onChanged);
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case 3:
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return _DropdownBar(tabs: tabs, currentIndex: currentIndex, onChanged: onChanged);
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default:
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return _PillBar(tabs: tabs, currentIndex: currentIndex, onChanged: onChanged);
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}
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}
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}
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class StatusBarTab {
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const StatusBarTab({required this.label, required this.icon});
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final String label;
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final IconData icon;
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}
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// ---------- 0: 胶囊滑块 ----------
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class _PillBar extends StatelessWidget {
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const _PillBar({required this.tabs, required this.currentIndex, required this.onChanged});
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final List<StatusBarTab> tabs;
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final int currentIndex;
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final ValueChanged<int> onChanged;
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@override
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Widget build(BuildContext context) {
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final colors = Theme.of(context).colorScheme;
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return Container(
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padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
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color: colors.surface,
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child: Container(
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padding: const EdgeInsets.all(4),
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decoration: BoxDecoration(
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color: colors.surfaceContainerHighest,
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borderRadius: BorderRadius.circular(24),
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),
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child: LayoutBuilder(
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builder: (context, constraints) {
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final tabWidth = constraints.maxWidth / tabs.length;
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return SizedBox(
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height: 40,
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child: Stack(
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children: [
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AnimatedPositioned(
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duration: const Duration(milliseconds: 200),
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curve: Curves.easeInOut,
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left: currentIndex * tabWidth,
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top: 0, bottom: 0, width: tabWidth,
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child: Padding(
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padding: const EdgeInsets.all(3),
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child: Container(
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decoration: BoxDecoration(
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color: colors.primary,
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borderRadius: BorderRadius.circular(20),
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boxShadow: [
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BoxShadow(color: Colors.black.withValues(alpha: 0.1), blurRadius: 8, offset: const Offset(0, 2)),
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],
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),
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),
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),
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),
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Row(
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children: [
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for (int i = 0; i < tabs.length; i++)
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_PillItem(
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colors: colors,
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tab: tabs[i],
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isSelected: currentIndex == i,
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onTap: () => onChanged(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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},
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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 _PillItem extends StatelessWidget {
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const _PillItem({required this.colors, required this.tab, required this.isSelected, required this.onTap});
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final ColorScheme colors;
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final StatusBarTab tab;
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final bool isSelected;
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final VoidCallback onTap;
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@override
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Widget build(BuildContext context) {
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return Expanded(
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child: GestureDetector(
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behavior: HitTestBehavior.opaque,
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onTap: onTap,
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child: AnimatedOpacity(
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opacity: isSelected ? 1.0 : 0.5,
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duration: const Duration(milliseconds: 200),
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curve: Curves.easeInOut,
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child: SizedBox.expand(
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child: Row(
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mainAxisAlignment: MainAxisAlignment.center,
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mainAxisSize: MainAxisSize.min,
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children: [
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Icon(tab.icon, size: 16, color: isSelected ? colors.onPrimary : colors.onSurface),
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const SizedBox(width: 6),
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Text(tab.label,
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style: TextStyle(
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fontSize: 13,
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fontWeight: isSelected ? FontWeight.w600 : FontWeight.w500,
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color: isSelected ? colors.onPrimary : colors.onSurface,
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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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}
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// ---------- 1: 下划线 ----------
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class _UnderlineBar extends StatelessWidget {
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const _UnderlineBar({required this.tabs, required this.currentIndex, required this.onChanged});
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final List<StatusBarTab> tabs;
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final int currentIndex;
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final ValueChanged<int> onChanged;
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@override
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Widget build(BuildContext context) {
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final colors = Theme.of(context).colorScheme;
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return Container(
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padding: const EdgeInsets.symmetric(horizontal: 8),
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color: colors.surface,
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child: Row(
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children: [
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for (int i = 0; i < tabs.length; i++)
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Expanded(
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child: GestureDetector(
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behavior: HitTestBehavior.opaque,
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onTap: () => onChanged(i),
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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Padding(
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padding: const EdgeInsets.symmetric(vertical: 12),
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child: Row(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Icon(tabs[i].icon, size: 16,
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color: currentIndex == i ? colors.primary : colors.onSurfaceVariant),
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const SizedBox(width: 6),
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Text(tabs[i].label,
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style: TextStyle(
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fontSize: 13,
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fontWeight: currentIndex == i ? FontWeight.w600 : FontWeight.w500,
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color: currentIndex == i ? colors.primary : colors.onSurfaceVariant,
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)),
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],
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),
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),
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Container(
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height: 2,
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margin: const EdgeInsets.symmetric(horizontal: 12),
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decoration: BoxDecoration(
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color: currentIndex == i ? colors.primary : Colors.transparent,
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borderRadius: BorderRadius.circular(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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),
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);
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}
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}
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// ---------- 2: 芯片组 ----------
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class _ChipBar extends StatelessWidget {
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const _ChipBar({required this.tabs, required this.currentIndex, required this.onChanged});
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final List<StatusBarTab> tabs;
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final int currentIndex;
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final ValueChanged<int> onChanged;
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@override
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Widget build(BuildContext context) {
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final colors = Theme.of(context).colorScheme;
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return Container(
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padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 10),
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color: colors.surface,
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child: Row(
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children: [
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for (int i = 0; i < tabs.length; i++) ...[
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if (i != 0) const SizedBox(width: 8),
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Expanded(
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child: GestureDetector(
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onTap: () => onChanged(i),
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child: AnimatedContainer(
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duration: const Duration(milliseconds: 180),
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height: 36,
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alignment: Alignment.center,
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decoration: BoxDecoration(
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color: currentIndex == i ? colors.primary : Colors.transparent,
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border: Border.all(
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color: currentIndex == i ? colors.primary : colors.outlineVariant,
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),
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borderRadius: BorderRadius.circular(18),
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),
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child: Row(
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mainAxisAlignment: MainAxisAlignment.center,
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mainAxisSize: MainAxisSize.min,
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children: [
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Icon(tabs[i].icon, size: 15,
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color: currentIndex == i ? colors.onPrimary : colors.onSurfaceVariant),
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const SizedBox(width: 5),
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Text(tabs[i].label,
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style: TextStyle(
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fontSize: 12,
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fontWeight: currentIndex == i ? FontWeight.w600 : FontWeight.w500,
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color: currentIndex == i ? colors.onPrimary : colors.onSurfaceVariant,
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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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),
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);
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}
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}
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// ---------- 3: 下拉 ----------
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class _DropdownBar extends StatelessWidget {
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const _DropdownBar({required this.tabs, required this.currentIndex, required this.onChanged});
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final List<StatusBarTab> tabs;
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final int currentIndex;
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final ValueChanged<int> onChanged;
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@override
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Widget build(BuildContext context) {
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final colors = Theme.of(context).colorScheme;
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final current = tabs[currentIndex];
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return Container(
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padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 10),
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color: colors.surface,
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child: Row(
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mainAxisAlignment: MainAxisAlignment.end,
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children: [
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PopupMenuButton<int>(
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onSelected: onChanged,
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itemBuilder: (context) => [
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for (int i = 0; i < tabs.length; i++)
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PopupMenuItem<int>(
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value: i,
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child: Row(
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children: [
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Icon(tabs[i].icon, size: 18,
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color: i == currentIndex ? colors.primary : colors.onSurfaceVariant),
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const SizedBox(width: 8),
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Text(tabs[i].label,
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style: TextStyle(
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fontWeight: i == currentIndex ? FontWeight.w600 : FontWeight.w500,
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color: i == currentIndex ? colors.primary : colors.onSurfaceVariant,
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)),
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],
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),
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),
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],
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child: Container(
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padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 8),
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decoration: BoxDecoration(
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color: colors.surfaceContainerHighest,
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borderRadius: BorderRadius.circular(18),
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),
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child: Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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Icon(current.icon, size: 16, color: colors.primary),
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const SizedBox(width: 6),
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Text(current.label,
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style: TextStyle(
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fontSize: 13,
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fontWeight: FontWeight.w600,
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color: colors.primary,
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)),
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const SizedBox(width: 4),
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Icon(Icons.keyboard_arrow_down, size: 18, color: colors.onSurfaceVariant),
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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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}
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