protected virtual void Dispose(bool disposing)
{
if (disposing)
{
_rootPageRenderer?.Dispose();
_viewStack?.Unrealize();
(ShellSection as IShellSectionController).NavigationRequested -= OnNavigationRequested;
}
}
protected async Task SetCurrentShellItemControllerAsync(IShellItemRenderer value)
{
_incomingRenderer = value;
await _activeTransition;
// This means the selected item changed while the active transition
// was finishing up
if (_incomingRenderer != value ||
value.ShellItem != this.Shell.CurrentItem)
{
(value as IDisconnectable)?.Disconnect();
value?.Dispose();
return;
}
var oldRenderer = _currentShellItemRenderer;
(oldRenderer as IDisconnectable)?.Disconnect();
var newRenderer = value;
_currentShellItemRenderer = value;
AddChildViewController(newRenderer.ViewController);
View.AddSubview(newRenderer.ViewController.View);
View.SendSubviewToBack(newRenderer.ViewController.View);
newRenderer.ViewController.View.Frame = View.Bounds;
if (oldRenderer != null)
{
var transition = CreateShellItemTransition();
_activeTransition = transition.Transition(oldRenderer, newRenderer);
await _activeTransition;
oldRenderer.ViewController.RemoveFromParentViewController();
oldRenderer.ViewController.View.RemoveFromSuperview();
oldRenderer.Dispose();
}
else
{
View.AddSubview(newRenderer.ViewController.View);
}
// current renderer is still valid
if (_currentShellItemRenderer == value)
{
UpdateBackgroundColor();
UpdateFlowDirection();
}
}
protected virtual void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
_disposed = true;
if (disposing)
{
if (_currentRenderer != null && _currentRenderer.Fragment.IsAlive())
{
FragmentTransaction transaction = FragmentManager.BeginTransaction();
transaction.RemoveEx(_currentRenderer.Fragment);
transaction.CommitAllowingStateLossEx();
FragmentManager.ExecutePendingTransactionsEx();
}
Element.PropertyChanged -= OnElementPropertyChanged;
Element.SizeChanged -= OnElementSizeChanged;
((IShellController)Element).RemoveAppearanceObserver(this);
// This cast is necessary because IShellFlyoutRenderer doesn't implement IDisposable
(_flyoutRenderer as IDisposable)?.Dispose();
_currentRenderer.Dispose();
_currentRenderer = null;
}
Element = null;
// TODO: free unmanaged resources (unmanaged objects) and override a finalizer below.
// TODO: set large fields to null.
_disposed = true;
}
