flutter-demo/lib/screens/item_screens/add_item_screen.dart

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:provider/provider.dart';
import 'package:item_tracker/models/item_model.dart';
import 'package:item_tracker/provider/item_provider.dart';

DateTime? selectedDate;

enum ItemIsUse {
  yes,
  no,
}

class AddItemScreen extends StatefulWidget {
  @override
  _FromTestRouteSate createState() => _FromTestRouteSate();
}

class _FromTestRouteSate extends State<AddItemScreen> {
  TextEditingController _nameController = TextEditingController();
  TextEditingController _descriptionController = TextEditingController();
  String? _selectedCategory; // 当前选中的分类
  TextEditingController _locationController = TextEditingController();
  ItemIsUse? _itemIsUse = ItemIsUse.yes;
  TextEditingController _priceController = TextEditingController();
  GlobalKey<FormState> _formKey = GlobalKey<FormState>();

  // 添加自定义分类列表
  List<String> _categories = ['A', 'B', 'C', 'D']; // 自定义分类

  // 更新选中的分类
  void _updateSelectedCategory(String? category) {
    setState(() {
      _selectedCategory = category;
    });
  }

  @override
  Widget build(BuildContext context) {
    var date = selectedDate;

    void setGroupValue(ItemIsUse? itemIsUse) {
      setState(() {
        _itemIsUse = itemIsUse;
      });
    }

    return Scaffold(
      appBar: AppBar(
        title: Text('新增物品'),
      ),
      body: Builder(builder: (context) {
        return Form(
          key: _formKey,
          autovalidateMode: AutovalidateMode.onUserInteraction,
          child: ListView(
            padding: EdgeInsets.symmetric(vertical: 8.0, horizontal: 16.0),
            children: <Widget>[
              TextFormField(
                autofocus: true,
                controller: _nameController,
                decoration: InputDecoration(
                  labelText: "名称",
                  hintText: "请输入物品名称",
                  border: OutlineInputBorder(),
                ),
                maxLength: 20,
                validator: (v) {
                  if (v == null || v.trim().isEmpty) {
                    print('名称不能为空');
                    return "物品名称不能为空";
                  }
                  return null;
                },
              ),
              SizedBox(height: 16.0),
              TextField(
                controller: _descriptionController,
                decoration: InputDecoration(
                  labelText: "物品描述",
                  hintText: "请输入物品描述",
                  border: OutlineInputBorder(),
                ),
                maxLines: 4,
                maxLength: 200,
              ),
              SizedBox(height: 16.0),
              DropdownButtonFormField<String>(
                value: _selectedCategory,
                items: _categories.map((category) {
                  return DropdownMenuItem<String>(
                    value: category,
                    child: Text(category),
                  );
                }).toList(),
                onChanged: _updateSelectedCategory,
                decoration: InputDecoration(
                  border: OutlineInputBorder(),
                  filled: true,
                  fillColor: Colors.grey[100],
                  labelText: '请选择分类',
                ),
              ),
              SizedBox(height: 16.0),
              TextFormField(
                controller: _locationController,
                decoration: InputDecoration(
                  labelText: "物品位置",
                  hintText: "请输入物品位置",
                  border: OutlineInputBorder(),
                ),
              ),
              SizedBox(height: 16.0),
              Text(
                date == null
                    ? '请选择日期'
                    : '已选择日期: ${date.year}年${date.month}月${date.day}日',
              ),
              SizedBox(height: 16.0),
              ElevatedButton.icon(
                icon: Icon(Icons.calendar_today, color: Colors.white),
                onPressed: () async {
                  var pickedDate = await showDatePicker(
                    context: context,
                    initialEntryMode: DatePickerEntryMode.calendarOnly,
                    initialDate: DateTime.now(),
                    firstDate: DateTime(2015, 8),
                    lastDate: DateTime(2101),
                  );
                  setState(() {
                    selectedDate = pickedDate;
                  });
                },
                label: Text('选择日期', style: TextStyle(color: Colors.white)),
                style: ElevatedButton.styleFrom(
                  shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(8.0),
                  ),
                ),
              ),
              SizedBox(height: 16.0),
              Wrap(
                crossAxisAlignment: WrapCrossAlignment.center,
                spacing: 12, // 每个元素之间水平间距
                runSpacing: 8, // 换行后垂直间距
                children: [
                  Text(
                    '请选择是否使用：',
                    style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
                  ),
                  Row(
                    mainAxisSize: MainAxisSize.min,
                    children: [
                      Radio<ItemIsUse>(
                        value: ItemIsUse.yes,
                        groupValue: _itemIsUse,
                        onChanged: setGroupValue,
                      ),
                      Text('是'),
                    ],
                  ),
                  Row(
                    mainAxisSize: MainAxisSize.min,
                    children: [
                      Radio<ItemIsUse>(
                        value: ItemIsUse.no,
                        groupValue: _itemIsUse,
                        onChanged: setGroupValue,
                      ),
                      Text('否'),
                    ],
                  ),
                ],
              ),
              SizedBox(height: 16.0),
              TextField(
                controller: _priceController,
                keyboardType: TextInputType.number,
                inputFormatters: [
                  FilteringTextInputFormatter.allow(
                    RegExp(r'^\d*\.?\d{0,2}$'),
                  ),
                ],
                decoration: InputDecoration(
                  labelText: "物品价格",
                  hintText: "请输入物品价格",
                  border: OutlineInputBorder(),
                ),
              ),
              SizedBox(height: 28.0),
              ElevatedButton(
                child: Padding(
                  padding: const EdgeInsets.all(16.0),
                  child: Text("提交"),
                ),
                onPressed: () {
                  if (_formKey.currentState!.validate()) {
                    final newItem = Item(
                      name: _nameController.text,
                      description: _descriptionController.text,
                      purchaseDate: selectedDate,
                    );

                    print(newItem.toMap());

                    // 获取 ItemProvider 并添加物品
                    Provider.of<ItemProvider>(context, listen: false)
                        .addItem(newItem);

                    // 弹窗提示添加成功
                    ScaffoldMessenger.of(context).showSnackBar(SnackBar(
                      content: Text('提交成功'),
                      duration: Duration(seconds: 1),
                    ));

                    // 确保只有在表单验证成功后才调用 Navigator.pop
                    Navigator.pop(context, true);
                  }
                },
                style: ElevatedButton.styleFrom(
                  shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(8.0),
                  ),
                  elevation: 4.0,
                ),
              ),
            ],
          ),
        );
      }),
    );
  }
}