void UpdateTitleView()
{
AToolbar bar = _toolbar;
if (bar == null)
{
return;
}
Page currentPage = Element.CurrentPage;
if (currentPage == null)
{
return;
}
VisualElement titleView = NavigationPage.GetTitleView(currentPage);
if (_titleViewRenderer != null)
{
var reflectableType = _titleViewRenderer as System.Reflection.IReflectableType;
var rendererType = reflectableType != null?reflectableType.GetTypeInfo().AsType() : _titleViewRenderer.GetType();
if (titleView == null || Registrar.Registered.GetHandlerTypeForObject(titleView) != rendererType)
{
if (_titleView != null)
{
_titleView.Child = null;
}
Platform.ClearRenderer(_titleViewRenderer.View);
_titleViewRenderer.Dispose();
_titleViewRenderer = null;
}
}
if (titleView == null)
{
return;
}
if (_titleViewRenderer != null)
{
_titleViewRenderer.SetElement(titleView);
}
else
{
_titleViewRenderer = Platform.CreateRenderer(titleView, Context);
if (_titleView == null)
{
_titleView = new Container(Context);
bar.AddView(_titleView);
}
_titleView.Child = _titleViewRenderer;
}
Platform.SetRenderer(titleView, _titleViewRenderer);
}
void ResetToolbar()
{
AToolbar oldToolbar = _toolbar;
_toolbar.SetNavigationOnClickListener(null);
_toolbar.RemoveFromParent();
_toolbar.RemoveView(_titleView);
_titleView = null;
if (_titleViewRenderer != null)
{
Platform.ClearRenderer(_titleViewRenderer.View);
_titleViewRenderer.Dispose();
_titleViewRenderer = null;
}
_toolbar.RemoveView(_titleIconView);
_titleIconView = null;
_imageSource = null;
_toolbar = null;
SetupToolbar();
// if the old toolbar had padding from transluscentflags, set it to the new toolbar
if (oldToolbar.PaddingTop != 0)
{
_toolbar.SetPadding(0, oldToolbar.PaddingTop, 0, 0);
}
RegisterToolbar();
UpdateToolbar();
UpdateMenu();
// Preserve old values that can't be replicated by calling methods above
if (_toolbar != null)
{
_toolbar.Subtitle = oldToolbar.Subtitle;
}
}
protected override void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
_disposed = true;
if (disposing)
{
Device.Info.PropertyChanged -= DeviceInfoPropertyChanged;
if (NavigationPageController != null)
{
var navController = NavigationPageController;
navController.PushRequested -= OnPushed;
navController.PopRequested -= OnPopped;
navController.PopToRootRequested -= OnPoppedToRoot;
navController.InsertPageBeforeRequested -= OnInsertPageBeforeRequested;
navController.RemovePageRequested -= OnRemovePageRequested;
}
if (Current != null)
{
Current.PropertyChanged -= CurrentOnPropertyChanged;
}
FragmentManager fm = FragmentManager;
if (!fm.IsDestroyed)
{
FragmentTransaction trans = fm.BeginTransactionEx();
foreach (Fragment fragment in _fragmentStack)
{
trans.RemoveEx(fragment);
}
trans.CommitAllowingStateLossEx();
fm.ExecutePendingTransactionsEx();
}
_toolbar.RemoveView(_titleView);
_titleView?.Dispose();
_titleView = null;
if (_titleViewRenderer != null)
{
Platform.ClearRenderer(_titleViewRenderer.View);
_titleViewRenderer.Dispose();
_titleViewRenderer = null;
}
_toolbar.RemoveView(_titleIconView);
_titleIconView?.Dispose();
_titleIconView = null;
_imageSource = null;
if (_toolbarTracker != null)
{
_toolbarTracker.CollectionChanged -= ToolbarTrackerOnCollectionChanged;
_toolbar.DisposeMenuItems(_currentToolbarItems, OnToolbarItemPropertyChanged);
_toolbarTracker.Target = null;
_toolbarTracker = null;
}
if (_currentMenuItems != null)
{
_currentMenuItems.Clear();
_currentMenuItems = null;
}
if (_currentToolbarItems != null)
{
_currentToolbarItems.Clear();
_currentToolbarItems = null;
}
if (_toolbar != null)
{
_toolbar.SetNavigationOnClickListener(null);
_toolbar.Menu.Clear();
RemoveView(_toolbar);
_toolbar.Dispose();
_toolbar = null;
}
if (_drawerLayout.IsAlive() && _drawerListener.IsAlive())
{
_drawerLayout.RemoveDrawerListener(_drawerListener);
RemoveView(_drawerLayout);
}
if (_drawerListener != null)
{
_drawerListener.Dispose();
_drawerListener = null;
}
if (_drawerToggle != null)
{
_drawerToggle.ToolbarNavigationClickListener = null;
_drawerToggle.Dispose();
_drawerToggle = null;
}
if (_backgroundDrawable != null)
{
_backgroundDrawable.Dispose();
_backgroundDrawable = null;
}
Current = null;
// We dispose the child renderers after cleaning up everything related to DrawerLayout in case
// one of the children is a FlyoutPage (which may dispose of the DrawerLayout).
if (Element != null)
{
foreach (Element element in PageController.InternalChildren)
{
var child = element as VisualElement;
if (child == null)
{
continue;
}
IVisualElementRenderer renderer = Platform.GetRenderer(child);
renderer?.Dispose();
}
}
}
base.Dispose(disposing);
}