fcs/lib/pages/notification_list.dart

import 'package:flutter/material.dart';
import 'package:intl/intl.dart';
import 'package:provider/provider.dart';
import 'package:fcs/model/notification_model.dart';
import 'package:fcs/pages/util.dart';
import 'package:fcs/vo/notification.dart' as Noti;
import 'package:fcs/vo/popup_menu.dart';
import 'package:fcs/widget/localization/app_translations.dart';
import 'package:fcs/widget/popupmenu.dart';
import 'package:fcs/widget/progress.dart';

import '../theme/theme.dart';

class NotificationList extends StatefulWidget {
  @override
  _NotificationListState createState() => _NotificationListState();
}

class _NotificationListState extends State<NotificationList> {
  var timeFormatter = new DateFormat('KK:mm a');
  var dateFormatter = new DateFormat('dd MMM');
  final double dotSize = 15.0;
  int _selectedIndex = 0;
  bool _isLoading = false;
  bool _isClicked = false;

  @override
  Widget build(BuildContext context) {
    NotificationModel notificationModel =
        Provider.of<NotificationModel>(context);

    return LocalProgress(
      inAsyncCall: _isLoading,
      child: Scaffold(
        appBar: AppBar(
          backgroundColor: primaryColor,
          title: Text(AppTranslations.of(context).text("noti.title")),
          actions: <Widget>[
            PopupMenuButton<PopupMenu>(
                elevation: 3.2,
                onSelected: (selected) {
                  setState(() {
                    this._selectedIndex = selected.index;
                  });
                  notificationModel.filter(selected.index);
                },
                icon: Container(
                    width: 30,
                    height: 30,
                    decoration: new BoxDecoration(
                      shape: BoxShape.circle,
                      color: Colors.white,
                    ),
                    child: Stack(
                      fit: StackFit.expand,
                      children: <Widget>[
                        Icon(
                          Icons.filter_list,
                          color: primaryColor,
                        ),
                        _selectedIndex != 0
                            ? Positioned(
                                bottom: 0,
                                right: 0,
                                child: Container(
                                  width: 10,
                                  height: 10,
                                  decoration: new BoxDecoration(
                                    shape: BoxShape.circle,
                                    color: secondaryColor,
                                  ),
                                ),
                              )
                            : Container()
                      ],
                    )),
                itemBuilder: (BuildContext context) {
                  return notificationMenu.map((PopupMenu choice) {
                    return PopupMenuItem<PopupMenu>(
                      value: choice,
                      child: Row(
                        children: <Widget>[
                          Text(choice.status),
                          SizedBox(
                            width: 10,
                          ),
                          _selectedIndex != null &&
                                  _selectedIndex == choice.index
                              ? Icon(
                                  Icons.check,
                                  color: Colors.grey,
                                )
                              : Container(),
                        ],
                      ),
                    );
                  }).toList();
                }),
          ],
        ),
        body: new ListView.separated(
            separatorBuilder: (context, index) => Divider(
                  color: Colors.black,
                ),
            scrollDirection: Axis.vertical,
            padding: EdgeInsets.only(left: 15, right: 15, top: 15),
            shrinkWrap: true,
            itemCount: notificationModel.notis.length,
            itemBuilder: (BuildContext context, int index) {
              Noti.Notification noti = notificationModel.notis[index];
              return Stack(
                children: <Widget>[
                  InkWell(
                    onTap: () => _display(noti),
                    child: Row(
                      children: <Widget>[
                        Expanded(
                          child: new Padding(
                            padding: const EdgeInsets.symmetric(vertical: 16.0),
                            child: new Row(
                              children: <Widget>[
                                new Padding(
                                  padding: new EdgeInsets.symmetric(
                                      horizontal: 32.0 - dotSize / 2),
                                  child: Icon(Icons.message),
                                ),
                                new Expanded(
                                  child: new Column(
                                    crossAxisAlignment:
                                        CrossAxisAlignment.start,
                                    children: <Widget>[
                                      new Text(
                                        noti.getDesc,
                                        style: new TextStyle(
                                            fontSize: 15.0,
                                            color: Colors.black),
                                      ),
                                      new Text(
                                        noti.itemType == "reg"
                                            ? ""
                                            : noti.itemNumber,
                                        style: new TextStyle(
                                            fontSize: 13.0, color: Colors.grey),
                                      ),
                                    ],
                                  ),
                                ),
                              ],
                            ),
                          ),
                        ),
                        Column(
                          mainAxisAlignment: MainAxisAlignment.center,
                          children: <Widget>[
                            Padding(
                              padding: const EdgeInsets.all(8.0),
                              child: Text(timeFormatter.format(noti.time)),
                            ),
                            noti.fromToday()
                                ? Container()
                                : Text(dateFormatter.format(noti.time)),
                          ],
                        )
                      ],
                    ),
                  ),
                  noti.seen
                      ? Container()
                      : new Positioned(
                          left: 11,
                          top: 11,
                          child: new Container(
                            padding: EdgeInsets.all(2),
                            decoration: new BoxDecoration(
                              color: Colors.red,
                              borderRadius: BorderRadius.circular(6),
                            ),
                            constraints: BoxConstraints(
                              minWidth: 18,
                              minHeight: 18,
                            ),
                            child: Text(
                              'new',
                              style: TextStyle(
                                color: Colors.white,
                                fontSize: 14,
                              ),
                              textAlign: TextAlign.center,
                            ),
                          ),
                        )
                ],
              );
            }),
      ),
    );
  }

  _display(Noti.Notification noti) async {
    if (_isClicked) return;
    _isClicked = true;
    await displayNotiContent(context, noti);
    _isClicked = false;
  }
}