fcs/lib/pages/storage/storage_list.dart

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:fcs/model/storage_model.dart';
import 'package:fcs/pages/storage/storage_addition.dart';
import 'package:fcs/fcs/common/theme.dart';
import 'package:fcs/vo/popup_menu.dart';
import 'package:fcs/vo/storage.dart';
import 'package:fcs/widget/local_text.dart';
import 'package:fcs/widget/my_data_table.dart';
import 'package:fcs/widget/number_cell.dart';
import 'package:fcs/widget/popupmenu.dart';
import 'package:fcs/widget/progress.dart';

import 'inventory_taking_list.dart';

class StorageList extends StatefulWidget {
  @override
  _StorageListState createState() => _StorageListState();
}

class _StorageListState extends State<StorageList> {
  final double dotSize = 15.0;
  PopupMenu selectedChoices = storageMenus[0];
  bool _isLoading = false;

  @override
  Widget build(BuildContext context) {
    var storageModel = Provider.of<StorageModel>(context);

    void _select(PopupMenu choice) async {
      selectedChoices = choice;
      if (choice.status == "Inventory Takings") {
        Navigator.push(
          context,
          MaterialPageRoute(builder: (context) => InventoryTakingList()),
        );
      }
    }

    return LocalProgress(
      inAsyncCall: _isLoading,
      child: Scaffold(
        appBar: AppBar(
          backgroundColor: primaryColor,
          title: LocalText(
            context,
            "storage.title",
            color: Colors.white,
            fontSize: 20,
          ),
          actions: <Widget>[
            PopupMenuButton<PopupMenu>(
                elevation: 3.2,
                onSelected: _select,
                itemBuilder: (BuildContext context) {
                  return storageMenus.map((PopupMenu choice) {
                    return PopupMenuItem<PopupMenu>(
                      value: choice,
                      child: Text(choice.status),
                    );
                  }).toList();
                })
          ],
        ),
        floatingActionButton: FloatingActionButton(
          backgroundColor: primaryColor,
          child: Icon(Icons.add),
          onPressed: () {
            Navigator.push(
              context,
              MaterialPageRoute(builder: (context) => StorageAddition()),
            );
          },
        ),
        body: new ListView.builder(
            padding: EdgeInsets.only(left: 10, right: 10, top: 15),
            shrinkWrap: true,
            itemCount: storageModel.storages.length,
            itemBuilder: (BuildContext context, int index) {
              return Card(
                elevation: 10,
                color: Colors.white,
                child: Theme(
                  data: ThemeData(accentColor: Colors.grey),
                  child: ExpansionTile(
                    onExpansionChanged: (e) =>
                        _onExpend(context, e, storageModel.storages[index]),
                    title: Row(
                      children: <Widget>[
                        new Row(
                          children: <Widget>[
                            new Padding(
                              padding: new EdgeInsets.symmetric(
                                  horizontal: 10.0 - dotSize / 2),
                              child: Padding(
                                  padding: EdgeInsets.all(10.0),
                                  child: Image.asset(
                                    "assets/inventory.png",
                                    width: 40,
                                    color: primaryColor,
                                  )),
                            ),
                            Padding(
                              padding: const EdgeInsets.all(8.0),
                              child: new Text(
                                  storageModel.storages[index].name == null
                                      ? ""
                                      : storageModel.storages[index].name,
                                  style: textStyle),
                            ),
                            Padding(
                              padding: const EdgeInsets.only(left: 8.0),
                              child: IconButton(
                                icon: Icon(Icons.edit),
                                onPressed: () {
                                  Navigator.push(
                                    context,
                                    MaterialPageRoute(
                                        builder: (context) => StorageAddition(
                                            storage:
                                                storageModel.storages[index])),
                                  );
                                },
                              ),
                            ),
                          ],
                        ),
                        SizedBox(
                          height: 15,
                        )
                      ],
                    ),
                    children: <Widget>[
                      storageModel.storages[index].productsLoaded
                          ? Container(
                              padding: EdgeInsets.only(top: 10),
                              child: SingleChildScrollView(
                                scrollDirection: Axis.horizontal,
                                child: MyDataTable(
                                  headingRowHeight: 40,
                                  columnSpacing: 50,
                                  columns: [
                                    MyDataColumn(
                                      label: LocalText(
                                          context, "inventory.product"),
                                    ),
                                    MyDataColumn(
                                      label: LocalText(
                                          context, "inventory.quantity"),
                                    ),
                                  ],
                                  rows: getProductRow(
                                      storageModel.storages[index]),
                                ),
                              ),
                            )
                          : Text("Loading..."),
                    ],
                  ),
                ),
              );
            }),
      ),
    );
  }

  List<MyDataRow> getProductRow(Storage storage) {
    return storage.products.map((p) {
      return MyDataRow(
        cells: [
          MyDataCell(
            new Text(
              p.name,
              style: textStyle,
            ),
          ),
          MyDataCell(NumberCell(p.quantity)),
        ],
      );
    }).toList();
  }

  _onExpend(BuildContext context, expended, Storage storage) {
    if (!expended) return;
    storage.productsLoaded = false;
    StorageModel storageModel = Provider.of<StorageModel>(context);
    storageModel.loadProducts(storage);
  }
}