generated from dellevin/template
276 lines
11 KiB
Dart
276 lines
11 KiB
Dart
import 'package:flutter/material.dart';
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/// 类型/标签选择右侧弹窗（影视类型、导演、编剧、主演、书籍类型通用）
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class GenreSelectorPage extends StatefulWidget {
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final String title;
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final List<String>? existingTags;
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final Future<List<String>>? existingTagsFuture;
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final List<String> initialSelected;
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final String hint;
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const GenreSelectorPage({
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super.key,
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required this.title,
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this.existingTags,
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this.existingTagsFuture,
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required this.initialSelected,
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this.hint = '',
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}) : assert(existingTags != null || existingTagsFuture != null, 'existingTags 和 existingTagsFuture 至少提供一个');
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/// 显示右侧弹窗
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static Future<List<String>?> show({
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required BuildContext context,
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required String title,
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List<String>? existingTags,
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Future<List<String>>? existingTagsFuture,
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required List<String> initialSelected,
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String hint = '',
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}) {
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return showGeneralDialog<List<String>>(
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context: context,
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barrierDismissible: true,
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barrierLabel: 'selector-panel',
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barrierColor: Colors.black.withValues(alpha: 0.3),
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transitionDuration: const Duration(milliseconds: 250),
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pageBuilder: (_, __, ___) => const SizedBox.shrink(),
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transitionBuilder: (ctx, anim, secAnim, child) {
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return SlideTransition(
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position: Tween(begin: const Offset(1, 0), end: Offset.zero)
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.animate(CurvedAnimation(parent: anim, curve: Curves.easeOut)),
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child: Align(
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alignment: Alignment.centerRight,
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child: GenreSelectorPage(
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title: title,
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existingTags: existingTags,
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existingTagsFuture: existingTagsFuture,
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initialSelected: initialSelected,
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hint: hint,
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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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@override
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State<GenreSelectorPage> createState() => _GenreSelectorPageState();
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}
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class _GenreSelectorPageState extends State<GenreSelectorPage> {
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late List<String> _selected;
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final _controller = TextEditingController();
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String _query = '';
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List<String>? _loadedTags;
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bool _loading = true;
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@override
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void initState() {
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super.initState();
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_selected = List<String>.from(widget.initialSelected);
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_loadTags();
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}
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Future<void> _loadTags() async {
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if (widget.existingTags != null) {
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_loadedTags = widget.existingTags;
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} else {
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_loadedTags = await widget.existingTagsFuture;
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}
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if (mounted) setState(() => _loading = false);
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}
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@override
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void dispose() {
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_controller.dispose();
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super.dispose();
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}
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void _toggle(String tag) {
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setState(() {
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if (_selected.contains(tag)) {
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_selected.remove(tag);
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} else {
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_selected.add(tag);
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}
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});
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}
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void _addCustom() {
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final tag = _query.trim();
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if (tag.isNotEmpty && !_selected.contains(tag)) {
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setState(() {
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_selected.add(tag);
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_query = '';
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_controller.clear();
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});
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}
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}
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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 screenWidth = MediaQuery.of(context).size.width;
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final allTags = _loadedTags ?? [];
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final query = _query.toLowerCase();
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final available = allTags
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.where((t) => !_selected.contains(t))
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.where((t) => query.isEmpty || t.toLowerCase().contains(query))
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.toList();
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return Material(
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color: colors.surface,
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borderRadius: const BorderRadius.horizontal(left: Radius.circular(16)),
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clipBehavior: Clip.antiAlias,
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child: SizedBox(
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width: screenWidth * 0.75,
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height: double.infinity,
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child: Column(
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children: [
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// Header
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Container(
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padding: EdgeInsets.fromLTRB(16, MediaQuery.of(context).padding.top + 12, 8, 12),
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decoration: BoxDecoration(
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border: Border(bottom: BorderSide(color: colors.outlineVariant, width: 0.5)),
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),
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child: Row(
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children: [
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Text(widget.title, style: TextStyle(fontSize: 18, fontWeight: FontWeight.w600, color: colors.onSurface)),
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const Spacer(),
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TextButton(
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onPressed: () => Navigator.pop(context, _selected),
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child: Text('完成', style: TextStyle(fontSize: 14, fontWeight: FontWeight.w600, color: colors.primary)),
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),
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],
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),
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),
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// 已选择（一行一个，最新在上）
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if (_selected.isNotEmpty) ...[
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Padding(
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padding: const EdgeInsets.fromLTRB(16, 12, 16, 0),
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child: Align(
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alignment: Alignment.centerLeft,
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child: Text('已选择', style: TextStyle(fontSize: 12, color: colors.onSurface.withValues(alpha: 0.4))),
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),
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),
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ConstrainedBox(
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constraints: BoxConstraints(maxHeight: MediaQuery.of(context).size.height * 0.25),
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child: Container(
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width: double.infinity,
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padding: const EdgeInsets.fromLTRB(16, 8, 16, 8),
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decoration: BoxDecoration(
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border: Border(bottom: BorderSide(color: colors.outlineVariant, width: 0.5)),
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),
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child: ListView.builder(
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padding: EdgeInsets.zero,
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itemCount: _selected.length,
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itemBuilder: (_, i) {
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final tag = _selected[_selected.length - 1 - i];
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return Padding(
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padding: const EdgeInsets.only(bottom: 6),
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child: Container(
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decoration: BoxDecoration(
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color: colors.primary.withValues(alpha: 0.1),
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borderRadius: BorderRadius.circular(10),
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),
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child: ListTile(
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dense: true,
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contentPadding: const EdgeInsets.symmetric(horizontal: 12),
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leading: Icon(Icons.check_circle, size: 20, color: colors.primary),
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title: Text(tag, style: TextStyle(fontSize: 14, fontWeight: FontWeight.w500, color: colors.onSurface)),
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trailing: GestureDetector(
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onTap: () => _toggle(tag),
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child: Icon(Icons.close, size: 18, color: colors.onSurface.withValues(alpha: 0.35)),
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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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// 搜索/输入框
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Padding(
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padding: const EdgeInsets.fromLTRB(16, 12, 16, 0),
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child: TextField(
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controller: _controller,
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style: TextStyle(fontSize: 14, color: colors.onSurface),
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cursorColor: colors.primary,
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decoration: InputDecoration(
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hintText: widget.hint.isNotEmpty ? '搜索或${widget.hint}' : '搜索或输入',
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hintStyle: TextStyle(fontSize: 14, color: colors.onSurface.withValues(alpha: 0.3)),
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filled: true,
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fillColor: colors.surfaceContainerHigh,
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contentPadding: const EdgeInsets.symmetric(horizontal: 14, vertical: 10),
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border: OutlineInputBorder(borderRadius: BorderRadius.circular(10), borderSide: BorderSide.none),
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enabledBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(10), borderSide: BorderSide.none),
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focusedBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(10), borderSide: BorderSide(color: colors.primary, width: 1)),
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suffixIcon: IconButton(
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icon: Icon(Icons.add, size: 20,
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color: _query.trim().isNotEmpty ? colors.primary : colors.onSurface.withValues(alpha: 0.25)),
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onPressed: _addCustom,
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),
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),
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onChanged: (v) => setState(() => _query = v),
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onSubmitted: (_) => _addCustom(),
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),
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),
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// 已有类型/搜索结果
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if (allTags.isNotEmpty) ...[
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Padding(
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padding: const EdgeInsets.fromLTRB(16, 12, 16, 0),
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child: Align(
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alignment: Alignment.centerLeft,
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child: Text(
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_loading ? '加载中...' : (query.isEmpty ? '已有类型' : '匹配结果'),
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style: TextStyle(fontSize: 12, color: colors.onSurface.withValues(alpha: 0.4)),
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),
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),
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),
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Expanded(
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child: _loading
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? Center(child: CircularProgressIndicator(strokeWidth: 2, color: colors.primary))
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: available.isEmpty
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? Center(child: Text(
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query.isEmpty ? '暂无已有选项' : '无匹配结果，回车添加',
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style: TextStyle(fontSize: 13, color: colors.onSurface.withValues(alpha: 0.3)),
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))
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: SingleChildScrollView(
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padding: const EdgeInsets.fromLTRB(16, 8, 16, 24),
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child: Wrap(
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spacing: 8,
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runSpacing: 8,
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children: available.map((tag) {
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return GestureDetector(
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onTap: () => _toggle(tag),
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child: Container(
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padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
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decoration: BoxDecoration(
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color: colors.surfaceContainerHighest,
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borderRadius: BorderRadius.circular(16),
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border: Border.all(color: colors.outline, width: 0.5),
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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(Icons.add, size: 14, color: colors.onSurface.withValues(alpha: 0.4)),
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const SizedBox(width: 4),
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Text(tag, style: TextStyle(fontSize: 13, color: colors.onSurface.withValues(alpha: 0.7))),
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],
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),
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),
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);
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}).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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),
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);
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}
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}
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