mobile-flutter/covas_mobile/lib/classes/descriptionImage.dart

import 'package:flutter/material.dart';
import 'events.dart';

import 'package:shared_preferences/shared_preferences.dart';

mixin ShowDescImageAdd<T extends StatefulWidget> on State<T> {
  Future<void> addEvents(var events) async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    var accessToken = prefs.getString("access_token") ?? "";
  }

  void showDescImageAddDialog(BuildContext context, var events) {
    // Create AlertDialog
    String name = events['name'];
    AlertDialog dialog = AlertDialog(
      title: Text("Ajouter un evenement"),
      content: Text("${name} n'a pas été trouvé. Voulez-vous l'ajouter ? "),
      actions: [
        TextButton(
            child: Text("Annuler"),
            onPressed: () {
              Navigator.of(context).pop("Yes, Of course!"); // Return value
            }),
        TextButton(
            child: Text("Oui"),
            onPressed: () {
              addEvents(events); // Return value
            }),
      ],
    );

    // Call showDialog function to show dialog.
    Future futureValue = showDialog(
        context: context,
        builder: (BuildContext context) {
          return dialog;
        });
  }
}