public override AView OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
var shellSection = ShellSection;
if (shellSection == null)
{
return(null);
}
if (shellSection.CurrentItem == null)
{
throw new InvalidOperationException($"Content not found for active {shellSection}. Title: {shellSection.Title}. Route: {shellSection.Route}.");
}
var context = Context;
var root = PlatformInterop.CreateShellCoordinatorLayout(context);
var appbar = PlatformInterop.CreateShellAppBar(context, Resource.Attribute.appBarLayoutStyle, root);
int actionBarHeight = context.GetActionBarHeight();
_toolbar = PlatformInterop.CreateShellToolbar(context, appbar, actionBarHeight, Resource.Style.ThemeOverlay_AppCompat_Light);
_tablayout = PlatformInterop.CreateShellTabLayout(context, appbar, actionBarHeight);
var pagerContext = MauiContext.MakeScoped(layoutInflater: inflater, fragmentManager: ChildFragmentManager);
var adapter = new ShellFragmentStateAdapter(shellSection, ChildFragmentManager, pagerContext);
var pageChangedCallback = new ViewPagerPageChanged(this);
_viewPager = PlatformInterop.CreateShellViewPager(context, root, _tablayout, this, adapter, pageChangedCallback);
Page currentPage = null;
int currentIndex = -1;
var currentItem = shellSection.CurrentItem;
var items = SectionController.GetItems();
while (currentIndex < 0 && items.Count > 0 && shellSection.CurrentItem != null)
{
currentItem = shellSection.CurrentItem;
currentPage = ((IShellContentController)shellSection.CurrentItem).GetOrCreateContent();
// current item hasn't changed
if (currentItem == shellSection.CurrentItem)
{
currentIndex = items.IndexOf(currentItem);
}
}
_toolbarTracker = _shellContext.CreateTrackerForToolbar(_toolbar);
_toolbarTracker.Page = currentPage;
_viewPager.CurrentItem = currentIndex;
if (items.Count == 1)
{
UpdateTablayoutVisibility();
}
_tablayout.LayoutChange += OnTabLayoutChange;
_tabLayoutAppearanceTracker = _shellContext.CreateTabLayoutAppearanceTracker(ShellSection);
_toolbarAppearanceTracker = _shellContext.CreateToolbarAppearanceTracker();
HookEvents();
return(_rootView = root);
}