flutter_app/lib/torstatus.dart

import 'package:flutter/material.dart';

class TorStatus extends ChangeNotifier {
  int progress;
  String status;
  bool connected;

  TorStatus({this.connected = false, this.progress = 0, this.status = ""});

  /// Called by the event bus.
  handleUpdate(int new_progress, String new_status) {
    if (progress == 100) {
      connected = true;
    } else {
      connected = false;
    }

    progress = new_progress;
    status = new_status;

    notifyListeners();
  }
}