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

import 'package:flutter/material.dart';
import 'package:item_tracker/screens/item_screens/widgets/category_dropdown.dart';
import 'package:item_tracker/screens/item_screens/widgets/date_picker_field.dart';
import 'package:item_tracker/screens/item_screens/widgets/description_field.dart';
import 'package:item_tracker/screens/item_screens/widgets/item_is_use_selector.dart';
import 'package:item_tracker/screens/item_screens/widgets/location_input_field.dart';
import 'package:item_tracker/screens/item_screens/widgets/name_input_field.dart';
import 'package:item_tracker/screens/item_screens/widgets/price_input_field.dart';
import 'package:item_tracker/screens/item_screens/widgets/submit_button.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,
}

extension ItemIsUseX on ItemIsUse {
  int toInt() {
    switch (this) {
      case ItemIsUse.yes:
        return 1;
      case ItemIsUse.no:
        return 0;
    }
  }

  static ItemIsUse? fromInt(int? value) {
    switch (value) {
      case 1:
        return ItemIsUse.yes;
      case 0:
        return ItemIsUse.no;
      default:
        return null;
    }
  }
}

class ItemScreen extends StatefulWidget {
  final Item? itemToEdit;

  const ItemScreen({Key? key, this.itemToEdit}) : super(key: key);

  @override
  _FromTestRouteSate createState() => _FromTestRouteSate();
}

class _FromTestRouteSate extends State<ItemScreen> {
  String _name = '';
  String _description = '';
  String _location = '';
  String _selected = '';
  double? _price;
  DateTime? _selectedDate;
  String? _selectedCategory; // 当前选中的分类
  ItemIsUse? _itemIsUse = ItemIsUse.yes;
  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

  @override
  void initState() {
    super.initState();
    final item = widget.itemToEdit;
    if (item != null) {
      _name = item.name;
      _description = item.description!;
      _selectedDate = item.purchaseDate;
    }
  }

  @override
  Widget build(BuildContext context) {
    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>[
              NameInputField(initialValue: _name, onChanged: (v) => _name = v),
              SizedBox(height: 16.0),
              DescriptionField(onChanged: (v) => _description = v),
              SizedBox(height: 16.0),
              CategoryDropdown(
                categories: _categories,
                selectedCategory: _selectedCategory,
                onChanged: (value) {
                  setState(() {
                    _selectedCategory = value;
                  });
                },
              ),
              SizedBox(height: 16.0),
              LocationInputField(onChanged: (v) => _location = v),
              SizedBox(height: 16.0),
              DatePickerField(
                  selectedDate: _selectedDate,
                  onDateSelected: (date) => setState(() {
                        _selectedDate = date;
                      })),
              SizedBox(height: 16.0),
              ItemIsUseSelector(
                  selected: _itemIsUse,
                  onChanged: (v) => setState(() {
                        _itemIsUse = v;
                      })),
              SizedBox(height: 16.0),
              PriceInputField(
                value: _price,
                onChanged: (val) {
                  setState(() {
                    _price = val;
                  });
                },
              ),
              SizedBox(height: 28.0),
              SubmitButton(
                  onPressed: () {
                    if (_formKey.currentState!.validate()) {
                      final newItem = Item(
                        name: _name,
                        description: _description,
                        purchaseDate: _selectedDate,
                        isInUse: _itemIsUse,
                        price: _price,
                      );

                      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);
                    }
                  },
                  isEdit: widget.itemToEdit != null)
            ],
          ),
        );
      }),
    );
  }
}