Unit-Bloc-Apps/lib/Pages/unit_details.dart

import 'dart:typed_data';
import '../Model/unit.dart';
import '../Widgets/photo_viewer.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';
import '../Utils/db_helper.dart';
import '../main.dart';
import 'package:intl/intl.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import '../Blocs/Units/Images/get_images_bloc.dart';
import '../Blocs/Units/Save/save_unit_bloc.dart';


class UnitDetails extends StatefulWidget {
  Unit unit;
  UnitDetails(this.unit);
  @override
  _UnitDetailsState createState() => _UnitDetailsState();
}

class _UnitDetailsState extends State<UnitDetails> {
  final tipeController = TextEditingController();
  final rangkaController = TextEditingController();
  final colorController = TextEditingController();
  final kodeController = TextEditingController();
  final mesinController = TextEditingController();
  final tahunController = TextEditingController();
  final stateController = TextEditingController();
  final channelController = TextEditingController();

  bool isChanged = false;
  List<Uint8List> images = [];
  List<int> blobIds = [];
  List<int> deleteBlobIds = [];
  List<ImageType> dropMenu = [];
  List<String> jenisImages = [];
  int jenisLength=0;
  late Unit _currentUnit;
  late GetImagesBloc _unitImagesBloc;
  late SaveUnitBloc _saveUnitBloc;
  List<Blob> blobList = [];

  loadUnitDetails(){
        _currentUnit = widget.unit;
        tipeController.text= _currentUnit.tipe;
        rangkaController.text = _currentUnit.rangka;
        colorController.text = _currentUnit.warna;
        kodeController.text = _currentUnit.kode;
        mesinController.text = _currentUnit.mesin;
        tahunController.text = _currentUnit.tahun;
        stateController.text = _currentUnit.state;
        channelController.text = (_currentUnit.channel==null||_currentUnit.channel==""||_currentUnit.channel=="null")?'-':_currentUnit.channel;
        _unitImagesBloc.add(GetImages(mesin:mesinController.text));
  }

  @override
  void dispose() {
    super.dispose();
    _unitImagesBloc.close();
    _saveUnitBloc.close();
  }

  @override
  void initState() {
    super.initState();
    _unitImagesBloc = GetImagesBloc();
    _saveUnitBloc = SaveUnitBloc();
  }
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      resizeToAvoidBottomInset: true,
      appBar: AppBar(
        backgroundColor: Colors.transparent,
        elevation: 0.0,
        iconTheme: IconThemeData(
          color: Colors.indigo,
        ),
        title: Text((widget.unit.flag=='FALSE')?'Inserting New Unit':'Editing Unit',style: TextStyle(color: Colors.indigo),),
      ),
      body: WillPopScope(
        onWillPop: ()async{
          if(widget.unit.flag=='TRUE'){
            if(isChanged){
              await showDialog(context: context,builder: (context)=>
                  Material(
                    color: Colors.white.withOpacity(0.9),
                    child: Center(
                      child: Container(
                        decoration: BoxDecoration(
                            color: Colors.white,
                            boxShadow: [
                              BoxShadow(
                                color: Colors.grey.withOpacity(0.5),
                                spreadRadius: 2,
                                blurRadius: 2,
                                offset: Offset(0, 0), // changes position of shadow
                              ),
                            ],
                            borderRadius: BorderRadius.circular(5)
                        ),
                        height:220,
                        // height: MediaQuery.of(context).size.height/4.8,
                        width: MediaQuery.of(context).size.width*0.75,
                        child: Column(
                          children: <Widget>[
                            Flexible(
                              flex:3,
                              child: Container(
                                padding: EdgeInsets.only(top:10,left: 10,right: 10),
                                alignment: Alignment.center,
                                decoration: BoxDecoration(
//                          color: Colors.indigo,
                                    borderRadius: BorderRadius.only(topLeft: Radius.circular(5),topRight: Radius.circular(5))
                                ),
                                child: Column(
                                  mainAxisSize: MainAxisSize.min,
                                  crossAxisAlignment: CrossAxisAlignment.center,
                                  children: <Widget>[
                                    Icon(Icons.warning,size: 70,color: Colors.indigo,),
                                  ],
                                ),
                              ),
                            ),
                            Flexible(
                              flex: 1,
                              child: Container(
                                  padding: EdgeInsets.only(left: 20,right: 20),
                                  alignment: Alignment.centerLeft,
                                  child: Text('Data belum disimpan. Lanjutkan ?',style: TextStyle(fontWeight: FontWeight.w500,fontSize: 14,color: Colors.black.withOpacity(0.6)),)
                              ),
                            ),
                            Flexible(
                              flex: 1,
                              child: Container(
                                padding: EdgeInsets.only(bottom:10),
                                child: Row(
                                  mainAxisAlignment: MainAxisAlignment.end,
                                  children: <Widget>[
                                    TextButton(
                                      child: Text('Proceed'),
//                  color: Colors.red,
                                      onPressed: (){
                                        Navigator.pop(context);
                                        Navigator.pop(context);
                                      },
                                    ),
                                    TextButton(
                                      child: Text('Cancel'),
//                  color: Colors.grey,
                                      onPressed: (){
                                        Navigator.pop(context);
                                      },
                                    ),
                                  ],
                                ),
                              ),
                            )
                          ],
                        ),
                      ),
                    ),
                  ),
              );
            }
            else Navigator.pop(context);
          }
          else{
            bool not_empty = (stateController.text!='-'&&mesinController.text!='-'&&tahunController.text!='-'&&kodeController.text!='-'&&colorController.text!='-'&&rangkaController.text!='-'&&tipeController.text!='-');
            if(blobList.where((element) => element.bytes!=null).length!=0){
              await showDialog(context: context,builder: (context)=>
                  Material(
                    color: Colors.white.withOpacity(0.9),
                    child: Center(
                      child: Container(
                        decoration: BoxDecoration(
                            color: Colors.white,
                            boxShadow: [
                              BoxShadow(
                                color: Colors.grey.withOpacity(0.5),
                                spreadRadius: 2,
                                blurRadius: 2,
                                offset: Offset(0, 0), // changes position of shadow
                              ),
                            ],
                            borderRadius: BorderRadius.circular(5)
                        ),
                        height:220,
                        // height: MediaQuery.of(context).size.height/4.8,
                        width: MediaQuery.of(context).size.width*0.75,
                        child: Column(
                          children: <Widget>[
                            Flexible(
                              flex:3,
                              child: Container(
                                padding: EdgeInsets.only(top:10,left: 10,right: 10),
                                alignment: Alignment.center,
                                decoration: BoxDecoration(
//                          color: Colors.indigo,
                                    borderRadius: BorderRadius.only(topLeft: Radius.circular(5),topRight: Radius.circular(5))
                                ),
                                child: Column(
                                  mainAxisSize: MainAxisSize.min,
                                  crossAxisAlignment: CrossAxisAlignment.center,
                                  children: <Widget>[
                                    Icon(Icons.warning,size: 70,color: Colors.indigo,),
                                  ],
                                ),
                              ),
                            ),
                            Flexible(
                              flex: 1,
                              child: Container(
                                  padding: EdgeInsets.only(left: 20,right: 20),
                                  alignment: Alignment.centerLeft,
                                  child: Text('Data belum disimpan. Lanjutkan ?',style: TextStyle(fontWeight: FontWeight.w500,fontSize: 14,color: Colors.black.withOpacity(0.6)),)
                              ),
                            ),
                            Flexible(
                              flex: 1,
                              child: Container(
                                padding: EdgeInsets.only(bottom:10),
                                child: Row(
                                  mainAxisAlignment: MainAxisAlignment.end,
                                  children: <Widget>[
                                    TextButton(
                                      child: Text('Back',style: TextStyle(color: Colors.indigo),),
                                      onPressed: (){
                                        Navigator.pop(context);
                                        Navigator.pop(context);
                                      },
                                    ),
                                    TextButton(
                                      child: Text('Cancel',style: TextStyle(color: Colors.indigo)),
                                      onPressed: (){
                                        Navigator.pop(context);
                                      },
                                    ),
                                  ],
                                ),
                              ),
                            )
                          ],
                        ),
                      ),
                    ),
                  ),
              );
            }
            else Navigator.pop(context);
          }
          return false;
        },
        child: MultiBlocProvider(
          providers: [
            BlocProvider(
              create: (_)=>_unitImagesBloc,
            ),
            BlocProvider(
              create: (_)=>_saveUnitBloc,
            ),
          ],
          child:MultiBlocListener(
            listeners: [
              BlocListener<GetImagesBloc,GetImagesState>(
                listener: (context,state){
                  if(state is GetImagesError){
                    util.showFlushbar(context, state.err,color: Colors.red);
                  }
                },
              ),
              BlocListener<SaveUnitBloc,SaveUnitState>(
                listener: (context,state){
                  if(state is SaveFinish){
                    if(state.success){
                      Navigator.pop(context,true);
                    }
                    util.showFlushbar(context, state.msg,color: state.success?Colors.grey:Colors.red);
                  }
                },
              ),
            ],

            child: BlocBuilder<GetImagesBloc,GetImagesState>(
              bloc: _unitImagesBloc,
              builder: (context,state){
                if(state is GetImagesLoading){
                  return Center(
                    child: Container(
                      height: 15,
                      width: 15,
                      child: CircularProgressIndicator(),
                    ),
                  );
                }
                else if (state is GetImagesFinish){
                  blobList = state.blobs;
                }
                else if (state is GetImagesInitial){
                  loadUnitDetails();
                }
                return Container(
                  padding: EdgeInsets.only(left:10,right: 10,bottom: 10),
                  child: Column(
                    children: <Widget>[
                      Expanded(
                        child: Row(
                          children: <Widget>[
                            Flexible(
                              flex: 4,
                              child: Container(
                                  height: MediaQuery.of(context).size.height,
                                  child:
                                  ListView.builder(
//                        itemCount: ((images.length+1)>jenisLength)?jenisLength:images.length+1,
                                      itemCount: blobList.length,
                                      itemBuilder: (context, index){
//                          Uint8List image = ((images.length==0)||(images.length<(index+1)))?null:images[index];
                                        Uint8List? image = blobList[index].bytes;
                                        return Padding(
                                          padding: const EdgeInsets.only(top: 10,right: 10),
                                          child: Material(
                                            child: InkWell(
                                              onTap: ()async{
                                                if(image==null){
//                                var selected = await showDialog(
//                                  context: context,
//                                  builder: (context){
//                                    var selected = dropMenu[0].value;
//                                    return WillPopScope(
//                                      onWillPop: ()async{
//                                        Navigator.pop(context,false);
//                                        return false;
//                                      },
//                                      child: AlertDialog(
//                                        content: StatefulBuilder(
//                                          builder: (context,setState){
//                                            return DropdownButtonFormField(
//                                              decoration: InputDecoration.collapsed(),
//                                              value: selected,
//                                              onChanged: (value){
//                                                setState(() {
//                                                  selected = value;
//                                                });
//                                              },
//                                              items: dropMenu.map((item) {
//                                                return new DropdownMenuItem<String>(
//                                                  value: item.value,
//                                                  child: Row(
//                                                    children: <Widget>[
//                                                      Text(item.value),
////                                                      (item.optional=='TRUE')?Container():Text(' *',style: TextStyle(color: Colors.red),)
//                                                    ],
//                                                  ),
//                                                );
//                                              }).toList(),
//                                            );
//                                          },
//                                        ),
//                                        actions: <Widget>[
//                                          TextButton(
//                                            child: Text('Done'),
//                                            onPressed: ()async{
//                                              jenisImages.add(selected);
//
//                                              Navigator.pop(context,true);
//                                            },
//                                          ),
//                                          TextButton(
//                                            child: Text('Cancel'),
//                                            onPressed: (){
//                                              Navigator.pop(context,false);
//                                            },
//                                          ),
//                                        ],
//                                      ),
//                                    );
//                                  }
//                                );
//                                if (selected){
                                                  XFile? temp = await ImagePicker().pickImage(source: ImageSource.camera,maxWidth: 800,imageQuality: 80);
                                                  if(temp!=null){
                                                    isChanged = true;
                                                    blobList[index].bytes = await temp.readAsBytes();
//                                    if(widget.idInsert!=null) {
//                                      blobIds.add(null);
//                                      isChanged = true;
//                                    }
                                                    setState(() {
                                                    });
                                                  }
//                                  else {
//                                    jenisImages.removeLast();
//                                  }
//                                  await loadDropMenu();
//                                }
                                                }
                                                else {
//                                List<ImageType> dropNewMenu = new List<ImageType>.from(dropMenu);
//                                dropNewMenu.add(new ImageType(value: jenisImages[index]));
                                                  var result = await Navigator.push(context, MaterialPageRoute(builder: (context) => PhotoViewer(image,id: widget.unit.id.toString()+'.$index',jenis: blobList[index].jenis,)));
                                                  if(result!=null){
                                                    blobList[index] = result['byte'];
                                                    isChanged = true;
//                                  images[index] = result['byte'];
//                                  jenisImages[index] = result['jenis'];
//                                  await loadDropMenu();
//                                  if(widget.idInsert!=null) {
//                                    isChanged = true;
//                                  }
                                                    setState(() {
                                                    });
                                                  }
                                                }
                                              },
                                              splashColor: Colors.grey,
                                              child: Column(
                                                children: <Widget>[
                                                  Container(padding: EdgeInsets.all(5),child: Text(blobList[index].jenis)),
                                                  Stack(
                                                    children: <Widget>[
                                                      Container(
                                                        decoration: BoxDecoration(
                                                          color: Colors.grey.withOpacity(0.7),
                                                          image: (image!=null)?DecorationImage(
                                                              image: MemoryImage(image),
                                                              fit: BoxFit.cover
                                                          ):null,
                                                        ),
                                                        height: MediaQuery.of(context).size.width*0.35,
                                                        width: MediaQuery.of(context).size.width*0.35,
                                                        child: (image==null)?Icon(Icons.add):null,
                                                      ),
                                                      (image!=null)?Container(
                                                        height: MediaQuery.of(context).size.width*0.35,
                                                        width: MediaQuery.of(context).size.width*0.35,
                                                        alignment: Alignment.topRight,
                                                        child: InkWell(
                                                          onTap: ()async{
//                                      if(widget.idInsert!=null){
//                                        isChanged = true;
//                                        deleteBlobIds.add(blobIds[index]);
//                                        blobIds.removeAt(index);
//                                      }
                                                            setState(() {
                                                              blobList[index].bytes = null;
//                                        images.removeAt(index);
//                                        jenisImages.removeAt(index);
                                                            });
//                                      await loadDropMenu();
                                                          },
                                                          child: Container(
                                                              padding: EdgeInsets.all(5),
                                                              child: Icon(Icons.cancel,color: Colors.red,)),
                                                        ),
                                                      ):Container(),
                                                    ],
                                                  ),
                                                ],
                                              ),
                                            ),
                                          ),
                                        );
                                      })
                              ),
                            ),
                            Flexible(
                              flex: 6,
                              child: Container(
                                alignment: Alignment.topLeft,
                                padding: EdgeInsets.only(top: 10),
                                child: SingleChildScrollView(
                                  scrollDirection: Axis.vertical,
                                  child: Column(
                                    mainAxisAlignment: MainAxisAlignment.start,
                                    children: <Widget>[
//                        Divider(),
//                        Row(
//                          mainAxisAlignment: MainAxisAlignment.spaceBetween,
//                          children: <Widget>[
//                            Expanded(
//                              child:
//                              textfield??Container(),
//                            ),
//                          ],
//                        ),
                                      Padding(
                                        padding: const EdgeInsets.all(5.0),
                                        child: Text('Units Details',style: TextStyle(fontSize: 18,fontWeight: FontWeight.bold),),
                                      ),
                                      Divider(),
                                      Row(
                                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
                                        children: <Widget>[
                                          Text('Tipe : '),
                                          Expanded(
                                            child:
                                            TextFormField(
                                              enabled: false,
                                              style: TextStyle(color: Colors.grey),
                                              controller: tipeController,
                                              decoration: InputDecoration.collapsed(hintText: null),
                                            ),
                                          ),
                                        ],
                                      ),
                                      Divider(),
                                      Row(
                                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
                                        children: <Widget>[
                                          Text('Mesin : '),
                                          Expanded(
                                            child: TextFormField(
                                              enabled: false,
                                              style: TextStyle(color: Colors.grey),
                                              controller: mesinController,
                                              decoration: InputDecoration.collapsed(hintText: null),
                                            ),
                                          ),
                                        ],
                                      ),
                                      Divider(),
                                      Row(
                                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
                                        children: <Widget>[
                                          Text('Rangka : '),
                                          Expanded(
                                            child: TextFormField(
                                              enabled: false,
                                              style: TextStyle(color: Colors.grey),
                                              controller: rangkaController,
                                              decoration: InputDecoration.collapsed(hintText: null),
                                            ),
                                          ),
                                        ],
                                      ),
                                      Divider(),
                                      Row(
                                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
                                        children: <Widget>[
                                          Text('Kode : '),
                                          Expanded(
                                            child: TextFormField(
                                              enabled: false,
                                              style: TextStyle(color: Colors.grey),
                                              controller: kodeController,
                                              decoration: InputDecoration.collapsed(hintText: null),
                                            ),
                                          ),
                                        ],
                                      ),
                                      Divider(),
                                      Row(
                                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
                                        children: <Widget>[
                                          Text('Tahun : '),
                                          Expanded(
                                            child: TextFormField(
                                              enabled: false,
                                              style: TextStyle(color: Colors.grey),
                                              controller: tahunController,
                                              decoration: InputDecoration.collapsed(hintText: null),
                                            ),
                                          ),
                                        ],
                                      ),
                                      Divider(),
                                      Row(
                                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
                                        children: <Widget>[
                                          Text('Warna : '),
                                          Expanded(
                                            child: TextFormField(
                                              enabled: false,
                                              style: TextStyle(color: Colors.grey),
                                              controller: colorController,
                                              decoration: InputDecoration.collapsed(hintText: null),
                                            ),
                                          ),
                                        ],
                                      ),
                                      Divider(),
                                      Row(
                                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
                                        children: <Widget>[
                                          Text('State : '),
                                          Expanded(
                                            child: TextFormField(
                                              enabled: false,
                                              style: TextStyle(color: Colors.grey),
                                              controller: stateController,
                                              decoration: InputDecoration.collapsed(hintText: null),
                                            ),
                                          ),
                                        ],
                                      ),
                                      Divider(),
                                      Row(
                                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
                                        children: <Widget>[
                                          Text('Channel : '),
                                          Expanded(
                                            child: TextFormField(
                                              enabled: false,
                                              style: TextStyle(color: Colors.grey),
                                              controller: channelController,
                                              decoration: InputDecoration.collapsed(hintText: null),
                                            ),
                                          ),
                                        ],
                                      ),
                                      Divider(),
                                      Row(
                                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
                                        children: <Widget>[
                                          TextButton(
                                            style: TextButton.styleFrom(
                                              backgroundColor: Colors.green,
                                            ),
                                            child: Text((widget.unit.flag=='FALSE')?'Add':'Save'),
                                            onPressed: ()async{
                                              if(currentPosisiton!=null) {
                                                if(blobList.where((element) => element.bytes!=null).length==blobList.length){
                                                  _saveUnitBloc.add(Save(blobs: blobList, unit: _currentUnit));
                                                }
                                                else{
                                                  util.showFlushbar(context, 'Tolong lengkapi data foto');
                                                }
                                              }
                                              else{
                                                util.showFlushbar(context, 'Gagal mengamil koordinat lokasi. Tolong cek gps.');
                                              }
                                            },

                                          ),
                                          TextButton(
                                            child: Text('Cancel'),
                                            onPressed: ()async {
                                              if(widget.unit.flag=='TRUE'){
                                                if(isChanged){
                                                  await showDialog(context: context,builder: (context)=>
                                                      Material(
                                                        color: Colors.white.withOpacity(0.9),
                                                        child: Center(
                                                          child: Container(
                                                            decoration: BoxDecoration(
                                                                color: Colors.white,
                                                                boxShadow: [
                                                                  BoxShadow(
                                                                    color: Colors.grey.withOpacity(0.5),
                                                                    spreadRadius: 2,
                                                                    blurRadius: 2,
                                                                    offset: Offset(0, 0), // changes position of shadow
                                                                  ),
                                                                ],
                                                                borderRadius: BorderRadius.circular(5)
                                                            ),
                                                            height:220,
                                                            // height: MediaQuery.of(context).size.height/4.8,
                                                            width: MediaQuery.of(context).size.width*0.75,
                                                            child: Column(
                                                              children: <Widget>[
                                                                Flexible(
                                                                  flex:3,
                                                                  child: Container(
                                                                    padding: EdgeInsets.only(top:10,left: 10,right: 10),
                                                                    alignment: Alignment.center,
                                                                    decoration: BoxDecoration(
//                          color: Colors.indigo,
                                                                        borderRadius: BorderRadius.only(topLeft: Radius.circular(5),topRight: Radius.circular(5))
                                                                    ),
                                                                    child: Column(
                                                                      mainAxisSize: MainAxisSize.min,
                                                                      crossAxisAlignment: CrossAxisAlignment.center,
                                                                      children: <Widget>[
                                                                        Icon(Icons.warning,size: 70,color: Colors.indigo,),
                                                                      ],
                                                                    ),
                                                                  ),
                                                                ),
                                                                Flexible(
                                                                  flex: 1,
                                                                  child: Container(
                                                                      padding: EdgeInsets.only(left: 20,right: 20),
                                                                      alignment: Alignment.centerLeft,
                                                                      child: Text('Data belum disimpan. Lanjutkan ?',style: TextStyle(fontWeight: FontWeight.w500,fontSize: 14,color: Colors.black.withOpacity(0.6)),)
                                                                  ),
                                                                ),
                                                                Flexible(
                                                                  flex: 1,
                                                                  child: Container(
                                                                    padding: EdgeInsets.only(bottom:10),
                                                                    child: Row(
                                                                      mainAxisAlignment: MainAxisAlignment.end,
                                                                      children: <Widget>[
                                                                        TextButton(
                                                                          child: Text('Proceed'),
                                                                          onPressed: (){
                                                                            Navigator.pop(context);
                                                                            Navigator.popUntil(context,ModalRoute.withName('/stocking'));
                                                                          },
                                                                        ),
                                                                        TextButton(
                                                                          child: Text('Cancel'),
//                  color: Colors.grey,
                                                                          onPressed: (){
                                                                            Navigator.pop(context);
                                                                          },
                                                                        ),
                                                                      ],
                                                                    ),
                                                                  ),
                                                                )
                                                              ],
                                                            ),
                                                          ),
                                                        ),
                                                      ),
                                                  );
                                                }
                                                else Navigator.pop(context);
                                              }
                                              else {
//                                  bool not_empty = (stateController.text!='-'&&mesinController.text!='-'&&tahunController.text!='-'&&kodeController.text!='-'&&colorController.text!='-'&&rangkaController.text!='-'&&tipeController.text!='-');
                                                if(blobList.where((element) => element.bytes!=null).length!=0){
                                                  await showDialog(context: context,builder: (context)=>
                                                      Material(
                                                        color: Colors.white.withOpacity(0.9),
                                                        child: Center(
                                                          child: Container(
                                                            decoration: BoxDecoration(
                                                                color: Colors.white,
                                                                boxShadow: [
                                                                  BoxShadow(
                                                                    color: Colors.grey.withOpacity(0.5),
                                                                    spreadRadius: 2,
                                                                    blurRadius: 2,
                                                                    offset: Offset(0, 0), // changes position of shadow
                                                                  ),
                                                                ],
                                                                borderRadius: BorderRadius.circular(5)
                                                            ),
                                                            height:220,
                                                            // height: MediaQuery.of(context).size.height/4.8,
                                                            width: MediaQuery.of(context).size.width*0.75,
                                                            child: Column(
                                                              children: <Widget>[
                                                                Flexible(
                                                                  flex:3,
                                                                  child: Container(
                                                                    padding: EdgeInsets.only(top:10,left: 10,right: 10),
                                                                    alignment: Alignment.center,
                                                                    decoration: BoxDecoration(
//                          color: Colors.indigo,
                                                                        borderRadius: BorderRadius.only(topLeft: Radius.circular(5),topRight: Radius.circular(5))
                                                                    ),
                                                                    child: Column(
                                                                      mainAxisSize: MainAxisSize.min,
                                                                      crossAxisAlignment: CrossAxisAlignment.center,
                                                                      children: <Widget>[
                                                                        Icon(Icons.warning,size: 70,color: Colors.indigo,),
                                                                      ],
                                                                    ),
                                                                  ),
                                                                ),
                                                                Flexible(
                                                                  flex: 1,
                                                                  child: Container(
                                                                      padding: EdgeInsets.only(left: 20,right: 20),
                                                                      alignment: Alignment.centerLeft,
                                                                      child: Text('Data belum disimpan. Lanjutkan ?',style: TextStyle(fontWeight: FontWeight.w500,fontSize: 14,color: Colors.black.withOpacity(0.6)),)
                                                                  ),
                                                                ),
                                                                Flexible(
                                                                  flex: 1,
                                                                  child: Container(
                                                                    padding: EdgeInsets.only(bottom:10),
                                                                    child: Row(
                                                                      mainAxisAlignment: MainAxisAlignment.end,
                                                                      children: <Widget>[
                                                                        TextButton(
                                                                          child: Text('Back'),
                                                                          onPressed: (){
                                                                            Navigator.pop(context);
                                                                            Navigator.popUntil(context,ModalRoute.withName('/stocking'));
                                                                          },
                                                                        ),
                                                                        TextButton(
                                                                          child: Text('Cancel'),
                                                                          onPressed: (){
                                                                            Navigator.pop(context);
                                                                          },
                                                                        ),
                                                                      ],
                                                                    ),
                                                                  ),
                                                                )
                                                              ],
                                                            ),
                                                          ),
                                                        ),
                                                      ),
                                                  );
                                                }
                                                else Navigator.pop(context);
                                              }
                                            },
                                            style: TextButton.styleFrom(
                                              backgroundColor: Colors.redAccent,
                                            ),
                                          )
                                        ],
                                      )
                                    ],
                                  ),
                                ),
                              ),
                            )
                          ],
                        ),
                      ),
                    ],
                  ),
                );
              },
            ),
          ),
        ),
      ),
    );
  }
}