public static void ListenParentChange([NotNull] this View view)
{
Should.NotBeNull(view, "view");
if (view.Context == null)
{
return;
}
ParentObserver.Raise(view);
if (ServiceProvider.AttachedValueProvider.GetValue <object>(view, VisitedParentPath, false) != null)
{
return;
}
ServiceProvider.AttachedValueProvider.SetValue(view, VisitedParentPath, view);
var parent = BindingServiceProvider.VisualTreeManager.FindParent(view) as View;
if (parent != null)
{
parent.ListenParentChange();
}
var viewGroup = view as ViewGroup;
if (viewGroup != null)
{
viewGroup.SetOnHierarchyChangeListener(GlobalViewParentListener.Instance);
for (int i = 0; i < viewGroup.ChildCount; i++)
{
viewGroup.GetChildAt(i).ListenParentChange();
}
}
}
public static void ListenParentChange([CanBeNull] this View view)
{
if (!view.IsAlive())
{
return;
}
ParentObserver.Raise(view);
if (view.GetTag(Resource.Id.ListenParentChange) != null)
{
return;
}
view.SetTag(Resource.Id.ListenParentChange, GlobalViewParentListener.Instance);
var parent = BindingServiceProvider.VisualTreeManager.FindParent(view) as View;
if (parent != null)
{
parent.ListenParentChange();
}
var viewGroup = view as ViewGroup;
if (viewGroup != null)
{
if (!viewGroup.GetBindingMemberValue(AttachedMembers.ViewGroup.DisableHierarchyListener))
{
viewGroup.SetOnHierarchyChangeListener(GlobalViewParentListener.Instance);
}
for (int i = 0; i < viewGroup.ChildCount; i++)
{
viewGroup.GetChildAt(i).ListenParentChange();
}
}
}
public virtual void ViewWillAppear(Action <bool> baseViewWillAppear, bool animated)
{
baseViewWillAppear(animated);
var viewController = ViewController;
if (viewController != null && !_isAppeared)
{
if (viewController.View != null)
{
ParentObserver.Raise(viewController.View, true);
}
UINavigationItem navigationItem = viewController.NavigationItem;
if (navigationItem != null)
{
SetParent(navigationItem, viewController);
SetParent(navigationItem.LeftBarButtonItem, viewController);
SetParent(navigationItem.LeftBarButtonItems, viewController);
SetParent(navigationItem.RightBarButtonItem, viewController);
SetParent(navigationItem.RightBarButtonItems, viewController);
}
SetParent(viewController.EditButtonItem, viewController);
SetParent(viewController.ToolbarItems, viewController);
var dialogViewController = viewController as DialogViewController;
if (dialogViewController != null)
{
SetParent(dialogViewController.Root, viewController);
}
var viewControllers = viewController.ChildViewControllers;
foreach (var controller in viewControllers)
{
controller.TryRaiseAttachedEvent(AttachedMembers.Object.Parent);
}
var tabBarController = viewController as UITabBarController;
if (tabBarController == null)
{
var splitViewController = viewController as UISplitViewController;
viewControllers = splitViewController == null ? null : splitViewController.ViewControllers;
}
else
{
viewControllers = tabBarController.ViewControllers;
}
if (viewControllers != null)
{
foreach (var controller in viewControllers)
{
controller.TryRaiseAttachedEvent(AttachedMembers.Object.Parent);
PlatformExtensions.SetHasState(controller, false);
}
}
viewController.TryRaiseAttachedEvent(AttachedMembers.Object.Parent);
_isAppeared = true;
}
Raise(ViewWillAppearHandler, animated);
}
public void OnChildViewAdded(View parent, View child)
{
ParentObserver.Raise(child);
var viewGroup = child as ViewGroup;
if (viewGroup != null && !viewGroup.IsDisableHierarchyListener())
{
viewGroup.SetOnHierarchyChangeListener(this);
}
}
public void OnChildViewAdded(View parent, View child)
{
ParentObserver.Raise(child);
var viewGroup = child as ViewGroup;
if (viewGroup != null && !viewGroup.GetBindingMemberValue(AttachedMembers.ViewGroup.DisableHierarchyListener))
{
viewGroup.SetOnHierarchyChangeListener(this);
}
}
private static void RaiseParentChanged(UIView[] items)
{
if (items == null)
{
return;
}
for (int index = 0; index < items.Length; index++)
{
ParentObserver.Raise(items[index], true);
}
}
public void OnChildViewRemoved(View parent, View child)
{
var viewGroup = (ViewGroup)parent;
if (viewGroup.ChildCount == 0 || viewGroup.GetChildAt(0) == child)
{
var underlyingView = GetUnderlyingView(child);
if (underlyingView != null)
{
BindingServiceProvider.ContextManager.GetBindingContext(underlyingView).ValueChanged -= BindingContextChangedDelegate;
}
viewGroup.SetBindingMemberValue(AttachedMembers.ViewGroup.Content, RemoveViewValue);
}
ParentObserver.Raise(child);
}
public virtual void ViewWillAppear(Action <bool> baseViewWillAppear, bool animated)
{
baseViewWillAppear(animated);
if (_viewController.View != null)
{
ParentObserver.Raise(_viewController.View, true);
}
UINavigationItem navigationItem = _viewController.NavigationItem;
if (navigationItem != null)
{
SetParent(navigationItem);
SetParent(navigationItem.LeftBarButtonItem);
SetParent(navigationItem.LeftBarButtonItems);
SetParent(navigationItem.RightBarButtonItem);
SetParent(navigationItem.RightBarButtonItems);
}
SetParent(_viewController.EditButtonItem);
SetParent(_viewController.ToolbarItems);
var dialogViewController = _viewController as DialogViewController;
if (dialogViewController != null)
{
SetParent(dialogViewController.Root);
}
var viewControllers = ViewController.ChildViewControllers;
foreach (var controller in viewControllers)
{
BindingExtensions.AttachedParentMember.Raise(controller, EventArgs.Empty);
}
var tabBarController = ViewController as UITabBarController;
if (tabBarController != null)
{
viewControllers = tabBarController.ViewControllers;
if (viewControllers != null)
{
foreach (var controller in viewControllers)
{
BindingExtensions.AttachedParentMember.Raise(controller, EventArgs.Empty);
controller.RestorationIdentifier = string.Empty;
}
}
}
Raise(ViewWillAppearHandler, animated);
}
protected override void InitializeView(IViewModel viewModel, IView view)
{
base.InitializeView(viewModel, view);
if (view == null)
{
return;
}
var underlyingView = view.GetUnderlyingView();
var uiView = underlyingView as UIView;
if (uiView != null)
{
ParentObserver.Raise(uiView, true);
}
var dialogViewController = underlyingView as DialogViewController;
if (dialogViewController != null && dialogViewController.Root != null)
{
BindingExtensions.AttachedParentMember.SetValue(dialogViewController.Root, dialogViewController);
}
}
public void OnChildViewAdded(View parent, View child)
{
var viewGroup = (ViewGroup)parent;
if (viewGroup.IndexOfChild(child) == 0)
{
var underlyingView = GetUnderlyingView(child);
if (underlyingView != null)
{
var dataContext = BindingServiceProvider.ContextManager.GetBindingContext(underlyingView);
dataContext.ValueChanged += BindingContextChangedDelegate;
UpdataContext(viewGroup, underlyingView, dataContext);
}
}
ParentObserver.Raise(child);
var childViewGroup = child as ViewGroup;
if (childViewGroup != null && !childViewGroup.GetBindingMemberValue(AttachedMembers.ViewGroup.DisableHierarchyListener))
{
childViewGroup.SetOnHierarchyChangeListener(GlobalViewParentListener.Instance);
}
}
public static void RaiseParentChanged(this UIView uiView, bool recursively = true)
{
ParentObserver.Raise(uiView, recursively);
}
public void OnChildViewRemoved(View parent, View child)
{
ParentObserver.Raise(child);
}
