json_to_form_with_theme 1.2.16

A simple library to convert Json to Form, fully customized and dynamic.

example/lib/main.dart

import 'dart:async';
import 'dart:math';

import 'package:example/drop_down_parser2.dart';
import 'package:example/widget_parser_factory.dart';
import 'package:flutter/material.dart';
import 'package:json_to_form_with_theme/json_to_form_with_theme.dart';
import 'package:json_to_form_with_theme/parsers/widget_parser.dart';
import 'package:json_to_form_with_theme/themes/json_form_theme.dart';
import 'package:intl/date_symbol_data_local.dart';
import 'package:intl/intl.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key? key, required this.title}) : super(key: key) {}





  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  Stream<Map<String, dynamic>>? onValueChangeStream;
  final StreamController<Map<String, dynamic>> _onUserController =
      StreamController<Map<String, dynamic>>();

  Map<String, WidgetParser> dynamics = {};

  final Map<String, dynamic> json = {
    "widgets": [
      {"type": "header", "name": "Header", "id": "29"},
      {
        "id": "1",
        "name": "DVT",
        "type": "toggle",
        "values": ["On", "Off"],
        "chosen_value": null,
        "time": 1630164109066,
      },
      {"type": "header", "name": "Header2", "id": "39"},
      {
        "id": "56",
        "name": "ADVT",
        "type": "toggle",
        "values": ["On", "Off"],
        "chosen_value": "Off",
        "time": 1630164109056,
      },
      {
        "id": "2",
        "name": "Static text",
        "type": "static_text",
        "chosen_value": "value",
        "description": "(description..)",
        "time": 1640164109066,
      },
      {
        "id": "26",
        "name": "Long name of the line but a short",
        "type": "static_text",
        "chosen_value": "value",
        "description": "(description..)",
        "time": 1640164109066,
      },
      {
        "id": "3",
        "name": "Blood Pressure with a long long long",
        "type": "edit_text",
        "chosen_value": "Val",
        "time": 1640260609562,
        "description": "mmHg - with a long description",
      },


      {"type": "header", "name": "Header", "id": "99"},
      {
        "id": "4",
        "name": "Drop down",
        "type": "drop_down",
        "time": 1640264109066,
        "values": ["Low-Intermediate", "Medium", "High", ""],
        "chosen_value": "Low-Intermediate"
      },
      {
        "id": "5",
        "name": "Dynamic Drop down",
        "type": "drop_down2",
        "values": ["one", "two", "three"],
        "chosen_value": "one",
        "time": 1530164109066,
      }
    ]
  };

  @override
  void initState() {
    super.initState();
    onValueChangeStream = _onUserController.stream.asBroadcastStream();
  }

  String buildDate(DateTime dateTime) {
    final now = DateTime.now();
    int diff = now.millisecondsSinceEpoch - dateTime.millisecondsSinceEpoch;

    if (diff < dayInMilliseconds) {
      return build24String(diff);
    } else if (diff >= dayInMilliseconds && diff < monthInMilliseconds) {
      return buildDaysString(diff);
    } else if (diff >= monthInMilliseconds && diff < yearInMilliseconds) {
      return buildMonthString(dateTime);
    }
    return dateTime.year.toString();
  }

  String buildDaysString(int diff) {
    int days = diff ~/ dayInMilliseconds;
    return "${days}d";
  }

  String buildMonthString(DateTime dateTime) {
    return DateFormat.MMMd().format(dateTime);
  }

  int yearInMilliseconds = 31556952000;
  int monthInMilliseconds = 2629800000;
  int weekInMilliseconds = 604800000;
  int dayInMilliseconds = 86400000;
  int hourInMilliseconds = 3600000;
  int minuteInMilliseconds = 60000;

  String build24String(int diff) {
    int hours = diff ~/ hourInMilliseconds;
    int minutes = (diff - (hours * hourInMilliseconds)) ~/ minuteInMilliseconds;
    return "${hours}h ${minutes}m";
  }

  Widget dateBuilder(int date) {
    DateTime dateTime = DateTime.fromMillisecondsSinceEpoch(date);
    return Text(buildDate(dateTime));
  }

  List<String> list = ["Medium", "High"];
  List<String> toggleList = ["On", "Off"];

  int counter = 0;
  int toggle = 1;

  bool changeToGoodBad = true;
  Future<dynamic> _refresh() {
    //"chosen_value": "Low-Intermediate"
    if(changeToGoodBad) {
      toggleList = ['Good', "Bad"];
      json['widgets'][1]['values'] = toggleList;
      json['widgets'][1]['chosen_value'] = "Bad";
      json['widgets'][6]['chosen_value'] = "good";
      json['widgets'][8]['chosen_value'] = "Medium";
    }else{
      toggleList = ["On", "Off"];
      json['widgets'][1]['chosen_value'] = "On";
      json['widgets'][1]['values'] = toggleList;
      json['widgets'][6]['chosen_value'] = "bad";
      json['widgets'][8]['chosen_value'] = "High";
    }

    changeToGoodBad = !changeToGoodBad;
    setState(() {

    });
    return Future.delayed(const Duration(seconds: 0));
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Floating Action Button'),
      ),
      body:  RefreshIndicator(
      onRefresh: _refresh,
        child: JsonFormWithTheme(
            jsonWidgets: json,
            dateBuilder: dateBuilder,
            dynamicFactory: MyWidgetParserFactory(),
            streamUpdates: onValueChangeStream,
            onValueChanged: (String d, dynamic s) async {
              print("Update id $d to value $s");
              await Future.delayed(const Duration(seconds: 1));
              return Future.value(true);
            },
            theme: const DefaultTheme()),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          counter++;
          if (counter % 4 == 1) {
            toggle++;
            _onUserController.add({}..["1"] = toggleList[toggle % 2]); // toggle
          }
          if (counter % 4 == 2) {
            _onUserController.add({}..["2"] =
                "updated" + Random().nextInt(10).toString()); // toggle
          }
          if (counter % 4 == 3) {
            _onUserController.add(
                {}..["3"] = "Val" + Random().nextInt(10).toString()); // toggle
          }
          if (counter % 4 == 0) {
            _onUserController.add({}..["4"] = list[toggle % 2]); // toggle
          }
        },
        child: const Icon(Icons.navigation),
        backgroundColor: Colors.green,
      ),
    );
  }
}