selfprivacy.org.app/lib/ui/pages/root_route.dart

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:selfprivacy/logic/api_maps/server.dart';
import 'package:selfprivacy/ui/components/brand_tab_bar/brand_tab_bar.dart';
import 'package:selfprivacy/ui/pages/more/more.dart';
import 'package:selfprivacy/ui/pages/providers/providers.dart';
import 'package:selfprivacy/ui/pages/services/services.dart';
import 'package:selfprivacy/ui/pages/users/users.dart';

import '../components/pre_styled_buttons/flash_fab.dart';

class RootPage extends StatefulWidget {
  const RootPage({Key? key}) : super(key: key);

  @override
  State<RootPage> createState() => _RootPageState();
}

class _RootPageState extends State<RootPage> with TickerProviderStateMixin {
  late TabController tabController;

  late final AnimationController _controller = AnimationController(
    duration: const Duration(milliseconds: 400),
    vsync: this,
  );
  late final Animation<double> _animation = CurvedAnimation(
    parent: _controller,
    curve: Curves.fastOutSlowIn,
  );

  @override
  void initState() {
    tabController = TabController(length: 4, vsync: this);
    tabController.addListener(() {
      setState(() {
        tabController.index == 2
            ? _controller.forward()
            : _controller.reverse();
      });
    });
    super.initState();
  }

  @override
  void dispose() {
    tabController.dispose();
    _controller.dispose();
    super.dispose();
  }

  var selfprivacyServer = ServerApi();

  @override
  Widget build(BuildContext context) {
    return SafeArea(
      child: Provider<ChangeTab>(
        create: (_) => ChangeTab(tabController.animateTo),
        child: Scaffold(
          body: TabBarView(
            controller: tabController,
            children: const [
              ProvidersPage(),
              ServicesPage(),
              UsersPage(),
              MorePage(),
            ],
          ),
          bottomNavigationBar: BrandTabBar(
            controller: tabController,
          ),
          floatingActionButton: SizedBox(
            height: 104 + 16,
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.end,
              mainAxisAlignment: MainAxisAlignment.end,
              children: [
                ScaleTransition(
                  scale: _animation,
                  child: FloatingActionButton.small(
                    heroTag: 'new_user_fab',
                    onPressed: () {
                      showModalBottomSheet<void>(
                        context: context,
                        isScrollControlled: true,
                        backgroundColor: Colors.transparent,
                        builder: (BuildContext context) {
                          return Padding(
                              padding: MediaQuery.of(context).viewInsets,
                              child: NewUser());
                        },
                      );
                    },
                    child: const Icon(Icons.person_add_outlined),
                  ),
                ),
                const SizedBox(height: 16),
                const BrandFab(),
              ],
            ),
          ),
        ),
      ),
    );
  }
}

class ChangeTab {
  final ValueChanged<int> onPress;

  ChangeTab(this.onPress);
}