flutter_app_android/lib/presentation/widgets/common/app_search_bar.dart

// 独立的搜索框组件
import 'package:flutter/material.dart';

class SearchBarCustom extends StatefulWidget {
  final ValueChanged<String>? onSearch;
  final ValueChanged<String>? onChanged;
  final VoidCallback? onClear;
  final String hintText;
  
  const SearchBarCustom({
    super.key,
    this.onSearch,
    this.onChanged,
    this.onClear,
    this.hintText = '搜索...',
  });
  
  @override
  State<SearchBarCustom> createState() => _SearchBarCustomState();
}

class _SearchBarCustomState extends State<SearchBarCustom> {
  final TextEditingController _controller = TextEditingController();
  final FocusNode _focusNode = FocusNode();
  
  @override
  void dispose() {
    _controller.dispose();
    _focusNode.dispose();
    super.dispose();
  }
  
  @override
  Widget build(BuildContext context) {
    return Container(
      decoration: BoxDecoration(
        color: Colors.grey[100],
        borderRadius: BorderRadius.circular(15),
      ),
      child: TextField(
        controller: _controller,
        focusNode: _focusNode,
        decoration: InputDecoration(
          hintText: widget.hintText,
          border: InputBorder.none,
          prefixIcon: const Icon(Icons.search),
          suffixIcon: _controller.text.isNotEmpty
              ? IconButton(
                  icon: const Icon(Icons.clear),
                  onPressed: () {
                    _controller.clear();
                    widget.onClear?.call();
                  },
                )
              : null,
          contentPadding: const EdgeInsets.symmetric(
            vertical: 15,
            horizontal: 20,
          ),
        ),
        onChanged: (value) {
          setState(() {}); // 更新清除按钮显示
          widget.onChanged?.call(value);
        },
        onSubmitted: (value) {
          widget.onSearch?.call(value);
          _focusNode.unfocus();
        },
      ),
    );
  }
}