content: /* Copyright (C) 2024 Ilias Koukovinis <ilias.koukovinis@gmail.com>
   *
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU Affero General Public License as
   * published by the Free Software Foundation, either version 3 of the
   * License, or (at your option) any later version.
   * 
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU Affero General Public License for more details.
   * 
   * You should have received a copy of the GNU Affero General Public License
   * along with this program. If not, see <https://www.gnu.org/licenses/>.
   */
  
  import 'package:flutter/material.dart';
  
  /// Base state to manage loading screens in StatefulWidgets.
  abstract class LoadingState<T extends StatefulWidget> extends State<T> {
    bool isLoading = true;
  
    @override
    Widget build(BuildContext context) {
      if (isLoading) {
        return buildLoadingScreen();
      }
  
      return build0(context);
    }
  
    /// Widget displayed while loading.
    Widget buildLoadingScreen();
  
    /// Main content widget when loading is complete.
    Widget build0(BuildContext context);
  }
  