Widget _overlayEntryBuilder()

in nav2-usability/scenario_code/lib/nested-routing/router.dart [145:196]
52 lines of code
7 McCabe index (conditional complexity)

  Widget _overlayEntryBuilder(BuildContext context) {
    return Scaffold(
      body: Navigator(
        key: navigatorKey,
        pages: [
          if (_appState.page == AppPage.settings)
            FadeTransitionPage(
              key: ValueKey('SettingsScreen'),
              child: SettingsScreen(),
            ),
          if (_appState.page == AppPage.newBooks ||
              _appState.page == AppPage.allBooks)
            FadeTransitionPage(
              key: ValueKey('BooksScreen'),
              child: BooksScreen(
                onTabSelected: (int idx) {
                  if (idx == 0) {
                    _appState.page = AppPage.newBooks;
                  } else {
                    _appState.page = AppPage.allBooks;
                  }
                },
                appPage: _appState.page,
              ),
            ),
        ],
        onPopPage: (route, result) {
          return route.didPop(result);
        },
      ),
      bottomNavigationBar: BottomNavigationBar(
        currentIndex: _appState.page == AppPage.settings ? 1 : 0,
        onTap: (idx) {
          if (idx == 0) {
            _appState.page = AppPage.newBooks;
          } else {
            _appState.page = AppPage.settings;
          }
        },
        items: [
          BottomNavigationBarItem(
            label: 'Books',
            icon: Icon(Icons.chrome_reader_mode_outlined),
          ),
          BottomNavigationBarItem(
            label: 'Settings',
            icon: Icon(Icons.settings),
          ),
        ],
      ),
    );
  }