fcs/lib/pages/do/do_product_item.dart

import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'package:provider/provider.dart';
import 'package:fcs/model/language_model.dart';
import 'package:fcs/pages/util.dart';
import 'package:fcs/fcs/common/theme.dart';
import 'package:fcs/vo/do.dart';
import 'package:fcs/widget/local_text.dart';
import 'package:fcs/widget/localization/app_translations.dart';
import 'package:fcs/widget/progress.dart';

class DOProductItem extends StatefulWidget {
  final DOLine doLine;
  const DOProductItem({Key key, this.doLine}) : super(key: key);
  @override
  _DOProductItemState createState() => _DOProductItemState();
}

class _DOProductItemState extends State<DOProductItem> {
  final _formKey = GlobalKey<FormState>();
  TextEditingController _doQty = new TextEditingController();
  DOLine doLine;
  bool _isLoading = false;

  @override
  void initState() {
    super.initState();
    if (widget.doLine != null) {
      doLine = widget.doLine;
      _doQty.text = widget.doLine.qty.toString();
    }
  }

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

    return LocalProgress(
      inAsyncCall: _isLoading,
      child: AlertDialog(
        title: Center(
            child: Text(
          AppTranslations.of(context).text("do_qty"),
          style: TextStyle(
              color: primaryColor, fontWeight: FontWeight.bold, fontSize: 20),
        )),
        content: Form(
          key: _formKey,
          child: Row(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.center,
            children: <Widget>[
              new Expanded(
                  child: new TextFormField(
                keyboardType: TextInputType.number,
                autofocus: true,
                controller: _doQty,
                style: TextStyle(fontWeight: FontWeight.bold, fontSize: 20),
                cursorColor: primaryColor,
                decoration: new InputDecoration(
                  fillColor: primaryColor,
                  icon: Icon(
                    FontAwesomeIcons.sortNumericUpAlt,
                    color: primaryColor,
                  ),
                  focusedBorder: UnderlineInputBorder(
                      borderSide: BorderSide(color: Colors.grey, width: 1.0)),
                ),
                validator: (value) {
                  if (value.isEmpty) {
                    return AppTranslations.of(context).text("do.form.volume");
                  }
                  return null;
                },
              ))
            ],
          ),
        ),
        actions: <Widget>[
          FlatButton(
              child: LocalText(
                context,
                'do.cancel',
                color: secondaryColor,
              ),
              onPressed: () {
                _doQty.clear();
                Navigator.of(context).pop();
              }),
          FlatButton(
              color: primaryColor,
              child: LocalText(
                context,
                'do.enter',
                color: Colors.white,
                fontWeight: FontWeight.bold,
              ),
              onPressed: () async {
                if (!_formKey.currentState.validate()) return;
                _save();
              })
        ],
      ),
    );
  }

  _save() {
    setState(() {
      _isLoading = true;
    });
    try {
      var qty = int.parse(_doQty.text);
      if (qty < 0)
        throw Exception("invalid number, must be zero or greater than zero");
      // if (qty > doLine.poLine.balanceQty)
      //   throw Exception(
      //       "invalid number, must be less than or equal to PO balance qty");
      this.doLine.qty = qty;
      Navigator.pop<DOLine>(context, this.doLine);
    } catch (e) {
      showMsgDialog(context, "Error", e.toString());
    } finally {
      setState(() {
        _isLoading = false;
      });
    }
  }

  _delete() {
    this.doLine.action = "delete";
    this.doLine.qty = 0;
    Navigator.pop<DOLine>(context, this.doLine);
  }
}