void DisposeChildRenderers()
{
IVisualElementRenderer childRenderer = APlatform.GetRenderer(_childView);
childRenderer?.Dispose();
_childView?.ClearValue(APlatform.RendererProperty);
}
protected override void OnLayout(bool changed, int l, int t, int r, int b)
{
if (_childView == null)
{
return;
}
Rectangle bounds = GetBounds(_isFlyout, l, t, r, b);
if (_isFlyout)
{
FlyoutPageController.FlyoutBounds = bounds;
}
else
{
FlyoutPageController.DetailBounds = bounds;
}
IVisualElementRenderer renderer = APlatform.GetRenderer(_childView);
renderer?.UpdateLayout();
// If we're using a PageContainer (i.e., we've wrapped our contents in a Fragment),
// Make sure that it gets laid out
if (_pageContainer != null)
{
if (_isFlyout)
{
var controller = (IFlyoutPageController)_parent;
var width = (int)Context.ToPixels(controller.FlyoutBounds.Width);
// When the base class computes the size of the Flyout container, it starts at the top of the
// screen and adds padding (_parent.FlyoutBounds.Top) to leave room for the status bar
// When this container is laid out, it's already starting from the adjusted y value of the parent,
// so we subtract _parent.FlyoutBounds.Top from our starting point (to get 0) and add it to the
// bottom (so the flyout page stretches to the bottom of the screen)
var height = (int)Context.ToPixels(controller.FlyoutBounds.Height + controller.FlyoutBounds.Top);
_pageContainer.Layout(0, 0, width, height);
}
else
{
_pageContainer.Layout(l, t, r, b);
}
_pageContainer.Child.UpdateLayout();
}
}
protected virtual void AddChildView(VisualElement childView)
{
_pageContainer = null;
Page page = childView as NavigationPage ?? (Page)(childView as TabbedPage);
if (page == null)
{
// The thing we're adding is not a NavigationPage or TabbedPage, so we can just use the old AddChildView
if (_currentFragment != null)
{
if (!_parent.IsAttachedToRoot())
{
return;
}
// But first, if the previous occupant of this container was a fragment, we need to remove it properly
FragmentTransaction transaction = FragmentManager.BeginTransactionEx();
transaction.RemoveEx(_currentFragment);
transaction.SetTransitionEx((int)FragmentTransit.None);
if (IsAttachedToWindow)
{
ExecuteTransaction(transaction);
}
else
{
_transaction = transaction;
}
_currentFragment = null;
}
IVisualElementRenderer renderer = APlatform.GetRenderer(childView);
if (renderer == null)
{
APlatform.SetRenderer(childView, renderer = APlatform.CreateRenderer(childView, Context));
}
if (renderer.View.Parent != this)
{
if (renderer.View.Parent != null)
{
renderer.View.RemoveFromParent();
}
SetDefaultBackgroundColor(renderer);
AddView(renderer.View);
renderer.UpdateLayout();
}
}
else
{
if (!_parent.IsAttachedToRoot())
{
return;
}
// The renderers for NavigationPage and TabbedPage both host fragments, so they need to be wrapped in a
// FragmentContainer in order to get isolated fragment management
Fragment fragment = FragmentContainer.CreateInstance(page);
var fc = fragment as FragmentContainer;
fc?.SetOnCreateCallback(pc =>
{
_pageContainer = pc;
UpdateFlowDirection();
SetDefaultBackgroundColor(pc.Child);
});
FragmentTransaction transaction = FragmentManager.BeginTransactionEx();
if (_currentFragment != null)
{
transaction.RemoveEx(_currentFragment);
}
transaction.AddEx(Id, fragment);
transaction.SetTransitionEx((int)FragmentTransit.None);
if (IsAttachedToWindow)
{
ExecuteTransaction(transaction);
}
else
{
_transaction = transaction;
}
_currentFragment = fragment;
}
}
public FlyoutPageContainer(FlyoutPage parent, bool isFlyout, Context context) : base(context)
{
Id = APlatform.GenerateViewId();
_parent = parent;
_isFlyout = isFlyout;
}
public EmbeddedFragment(ViewGroup content, AppCompat.Platform platform)
{
_content = content;
_platform = platform;
}
