Блог

вот класс местоположения, определенный в разделе местоположение.файл для дротиков

 class Location extends StatefulWidget {


  @override
  _LocationState createState() => _LocationState();
}

class _LocationState extends State<Location> {

  @override
  void initState(){
    _getLocation();
    super.initState();

  }

  String _value = "";
  String _adresse = "";

  String get adresse => _adresse;

  String _coordonnees = "";

  String get coordonnees => _coordonnees;
  var _locationMessage;
  late Position currentPosition;

  @override
  Widget build(BuildContext context) {
    return FutureBuilder(
      future: _getLocation(),
      builder: (context, snapshot) {
        if(snapshot.hasData){
 
            return TextFormField(
              initialValue : "${(_locationMessage as String)}",
              decoration: InputDecoration(labelText: 'adresse', icon: Icon(Icons.location_on)),
                enabled: true,
              validator: (value) {
                if (value == null || value.isEmpty) {
                  return "Veuillez entrez votre adresse";
                }
                return null;
              },
//here i save the value of my textFormfield in my variable class
              onSaved: (value) {   
                this._adresse = value.toString();
                this._coordonnees = _locationMessage;
              },
            );
        }else if(snapshot.hasError){
          //error
           return Text("Une erreur est survenue lors du chargement de l'adresse.");
        }else{
          return LinearProgressIndicator(value: null);
        }
      },
    );


  }
}
 

в файле form.dart я использую виджет местоположения.
как я могу использовать метод onsave для присвоения значения «адрес» и «координаты» моего объекта местоположения переменной «адрес» и «координаты» файла form.dart?

 
class Formulaire extends StatefulWidget {
  @override
  _FormulaireState createState() => _FormulaireState();
}

class _FormulaireState extends State<Formulaire> {

  late SaveModel model;
  String _nom = "";

  String value = "";

  String _date = "";

  String _adresse = "";
  String _coordonnees = "";

  final GlobalKey<FormState> _formkey = GlobalKey<FormState>();

  Widget _buildNom() {
    return TextFormField(
      decoration: InputDecoration(labelText: 'nom', icon: Icon(Icons.camera_alt)),
      validator: (value) {
        if (value == null || value.isEmpty) {
          return "Veuillez entrez votre nom";
        }
        return null;
      },

 //here i can use the onsave method without any problem
      onSaved: (value) {
        this._nom = value.toString();
        this.model.nom = this._nom;
      },
    );
  }

  Widget _buildDate() {
    this._date = DateTime.now().toString();
    return DateTimeFormField(
      decoration: InputDecoration(labelText: 'nom', icon: Icon(Icons.access_time)),
      initialValue: DateTime.now().toLocal(),
      enabled: false,

 //here again i can use the onsave method without any problem

      onSaved: (value) {
        this._date = value.toString();
        this.model.date = this._date;
      },
    );
  }

//the callback when i want to validate my form

  _valid() async {
    if (this._formkey.currentState!.validate()) {
      return;
    } else {
      this._formkey.currentState?.save();

    }
  }



  @override
  Widget build(BuildContext context) {
    return Container(
      margin: EdgeInsets.all(24),
      child: Form(
        key: _formkey,
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            _buildNom(),
            _buildDate(),

//here i create the Location widget
// my question : how can i use the onsave method to assign a the "address" and "coordonnee" value of my Location object to the variable "adresse" and "coordonnees" of form.dart file ?
            Location(),

            SizedBox(
              height: 100,
            ),
            ElevatedButton(
              style: ButtonStyle(
                  backgroundColor:
                      MaterialStateProperty.all<Color>(Colors.redAccent)),
              onPressed: _valid,
              child: Text(
                'Valider',
                style: TextStyle(color: Colors.white54, fontSize: 16),
              ),
            ),
          ],
        ),
      ),
    );
  }
 

i don’t have any idea of how to do that.