/// <summary>
/// Shows the flyout placed in relation to the specified element, and use this element as parent for content items.
/// </summary>
/// <param name="flyoutBase">The specified flayout.</param>
/// <param name="placementTarget">The element to use as the flyout's placement target.</param>
public static void ShowAtEx([NotNull] this FlyoutBase flyoutBase, [NotNull] FrameworkElement placementTarget)
{
Should.NotBeNull(flyoutBase, "flyoutBase");
Should.NotBeNull(placementTarget, "placementTarget");
var flyout = flyoutBase as Flyout;
if (flyout == null)
{
var menuFlyout = flyoutBase as MenuFlyout;
if (menuFlyout != null && menuFlyout.Items != null)
{
foreach (MenuFlyoutItemBase item in menuFlyout.Items)
{
ParentObserver.GetOrAdd(item).Parent = placementTarget;
}
}
}
else
{
var content = flyout.Content as FrameworkElement;
if (content != null)
{
ParentObserver.GetOrAdd(content).Parent = placementTarget;
}
}
flyoutBase.ShowAt(placementTarget);
}
public override UICollectionViewCell GetCell(UICollectionView collectionView, NSIndexPath indexPath)
{
var selector = _itemTemplateProvider.TemplateSelector;
if (selector == null)
{
throw new NotSupportedException("The ItemTemplate is null to create UICollectionViewCell use the ItemTemplate with ICollectionCellTemplateSelector value.");
}
object item = GetItemAt(indexPath);
UICollectionViewCell cell;
var cellTemplateSelectorSupportDequeueReusableCell = selector as ICollectionCellTemplateSelectorSupportDequeueReusableCell;
if (cellTemplateSelectorSupportDequeueReusableCell == null)
{
cell = (UICollectionViewCell)collectionView.DequeueReusableCell(selector.GetIdentifier(item, collectionView), indexPath);
}
else
{
cell = cellTemplateSelectorSupportDequeueReusableCell.DequeueReusableCell(collectionView, item, indexPath);
}
cell.SetDataContext(item);
if (!HasMask(cell, InitializedStateMask))
{
cell.Tag |= InitializedStateMask;
ParentObserver.GetOrAdd(cell).Parent = collectionView;
selector.InitializeTemplate(collectionView, cell);
InitializeCell(cell);
}
CellMediator.Attach(collectionView, cell, indexPath);
return(cell);
}
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 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 ShowAtEx([NotNull] this FlyoutBase flyoutBase, [NotNull] FrameworkElement placementTarget)
{
Should.NotBeNull(flyoutBase, nameof(flyoutBase));
Should.NotBeNull(placementTarget, nameof(placementTarget));
var flyout = flyoutBase as Flyout;
if (flyout == null)
{
var items = (flyoutBase as MenuFlyout)?.Items;
if (items != null)
{
foreach (MenuFlyoutItemBase item in items)
{
ParentObserver.Set(item, placementTarget);
}
}
}
else
{
var content = flyout.Content as FrameworkElement;
if (content != null)
{
ParentObserver.Set(content, placementTarget);
}
}
flyoutBase.ShowAt(placementTarget);
}
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);
}
private static object GetViewParentValue(IBindingMemberInfo arg1, View view)
{
if (view.Id == Android.Resource.Id.Content)
{
return(view.Context.GetActivity());
}
return(ParentObserver.GetOrAdd(view).Parent);
}
public static void ShowEx <T, TParent>([NotNull] this T actionSheet, TParent parent,
[NotNull] Action <T, TParent> showAction)
where T : UIActionSheet
{
Should.NotBeNull(actionSheet, "actionSheet");
Should.NotBeNull(showAction, "showAction");
ParentObserver.GetOrAdd(actionSheet).Parent = parent;
showAction(actionSheet, parent);
}
public static void SetInputViewEx([NotNull] this UITextField textField, UIView view)
{
Should.NotBeNull(textField, "textField");
textField.InputView = view;
if (view != null)
{
ParentObserver.GetOrAdd(view).Parent = textField;
}
}
public static void SetInputViewEx([NotNull] this UITextField textField, UIView view)
{
Should.NotBeNull(textField, nameof(textField));
textField.InputView = view;
if (view != null)
{
ParentObserver.Set(view, textField);
}
}
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);
}
}
public void OnChildViewAdded(View parent, View child)
{
ParentObserver.Raise(child);
var viewGroup = child as ViewGroup;
if (viewGroup != null && !viewGroup.IsDisableHierarchyListener())
{
viewGroup.SetOnHierarchyChangeListener(this);
}
}
private static bool MenuItemUpdateActionView(IBindingMemberInfo bindingMemberInfo, IMenuItem menuItem, object content)
{
var actionView = menuItem.GetActionView();
if (actionView != null)
{
ParentObserver.Set(actionView, null);
}
object template = menuItem.GetBindingMemberValue(AttachedMembers.MenuItem.ActionViewTemplateSelector)?.SelectTemplate(content, menuItem);
if (template != null)
{
content = template;
}
if (content == null)
{
#if APPCOMPAT
MenuItemCompat.SetActionView(menuItem, null);
#else
menuItem.SetActionView(null);
#endif
return(true);
}
LayoutInflaterResult result = null;
int viewId;
if (int.TryParse(content.ToString(), out viewId))
{
result = GetContextFromItem(menuItem).GetBindableLayoutInflater().InflateEx(viewId, null, false);
content = result.View;
}
actionView = content as View;
if (actionView == null)
{
Type viewType = TypeCache <View> .Instance.GetTypeByName(content.ToString(), true, true);
actionView = viewType.CreateView(GetContextFromItem(menuItem));
}
#if APPCOMPAT
MenuItemCompat.SetActionView(menuItem, actionView);
#else
menuItem.SetActionView(actionView);
#endif
ParentObserver.Set(actionView, menuItem);
var bindings = GetActionViewBind(menuItem);
if (!string.IsNullOrEmpty(bindings))
{
BindingServiceProvider.BindingProvider.CreateBindingsFromString(actionView, bindings, null);
}
result?.ApplyBindings();
return(true);
}
private static void RaiseParentChanged(UIView[] items)
{
if (items == null)
{
return;
}
for (int index = 0; index < items.Length; index++)
{
ParentObserver.Raise(items[index], true);
}
}
private static bool MenuItemUpdateActionView(IBindingMemberInfo bindingMemberInfo, IMenuItem menuItem, object content)
{
var actionView = menuItem.GetActionView();
if (actionView != null)
{
ParentObserver.GetOrAdd(actionView).Parent = null;
}
var selector = MenuItemActionViewSelectorMember.GetValue(menuItem, null);
if (selector != null)
{
object template = selector.SelectTemplate(content, menuItem);
if (template != null)
{
content = template;
}
}
if (content == null)
{
menuItem.SetActionView(null);
return(true);
}
int viewId;
if (int.TryParse(content.ToString(), out viewId))
{
menuItem.SetActionView(viewId);
actionView = menuItem.GetActionView();
}
else
{
actionView = content as View;
if (actionView == null)
{
Type viewType = TypeCache <View> .Instance.GetTypeByName(content.ToString(), false, true);
actionView = viewType.CreateView(GetContextFromMenuItem(menuItem));
}
menuItem.SetActionView(actionView);
}
ParentObserver.GetOrAdd(actionView).Parent = menuItem;
var bindings = MenuItemTemplate.GetActionViewBind(menuItem);
if (!string.IsNullOrEmpty(bindings))
{
BindingServiceProvider.BindingProvider.CreateBindingsFromString(actionView, bindings, null);
}
return(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);
}
public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath)
{
object item = GetItemAt(indexPath);
var selector = _templateProvider.TableCellTemplateSelector;
NSString cellIdentifier = selector == null
? GetCellIdentifier(item)
: selector.GetIdentifier(item, tableView);
UITableViewCell cell = tableView.DequeueReusableCell(cellIdentifier);
if (cell == null)
{
if (selector != null)
{
cell = selector.SelectTemplate(tableView, cellIdentifier);
}
if (cell == null)
{
var cellStyle = tableView.GetBindingMemberValue(AttachedMembers.UITableView.CellStyle).GetValueOrDefault(UITableViewCellStyle.Default);
cell = new UITableViewCellBindable(cellStyle, cellIdentifier);
}
}
_lastCreatedCell = cell;
_lastCreatedCellPath = indexPath;
if (Equals(item, _selectedItem) && !cell.Selected)
{
tableView.SelectRow(indexPath, false, UITableViewScrollPosition.None);
}
cell.Tag |= InitializingStateMask;
cell.SetDataContext(item);
if (!HasMask(cell, InitializedStateMask))
{
cell.Tag |= InitializedStateMask;
ParentObserver.GetOrAdd(cell).Parent = tableView;
SetCellBinding(tableView, cell);
}
cell.Tag &= ~InitializingStateMask;
var initializableItem = cell as IHasDisplayCallback;
if (initializableItem != null)
{
initializableItem.WillDisplay();
}
return(cell);
}
private static bool MenuItemUpdateActionView(IBindingMemberInfo bindingMemberInfo, IMenuItem menuItem, object content)
{
var actionView = menuItem.GetActionView();
if (actionView != null)
{
ParentObserver.GetOrAdd(actionView).Parent = null;
}
object template = menuItem.GetBindingMemberValue(AttachedMembers.MenuItem.ActionViewTemplateSelector)?.SelectTemplate(content, menuItem);
if (template != null)
{
content = template;
}
if (content == null)
{
menuItem.SetActionView(null);
return(true);
}
int viewId;
if (int.TryParse(content.ToString(), out viewId))
{
content = GetContextFromItem(menuItem).GetBindableLayoutInflater().Inflate(viewId, null);
}
actionView = content as View;
if (actionView == null)
{
Type viewType = TypeCache <View> .Instance.GetTypeByName(content.ToString(), true, true);
actionView = viewType.CreateView(GetContextFromItem(menuItem));
}
menuItem.SetActionView(actionView);
ParentObserver.GetOrAdd(actionView).Parent = menuItem;
var bindings = GetActionViewBind(menuItem);
if (!string.IsNullOrEmpty(bindings))
{
BindingServiceProvider.BindingProvider.CreateBindingsFromString(actionView, bindings, null);
}
return(true);
}
private static object FindByNameMemberImpl(IBindingMemberInfo bindingMemberInfo, FrameworkElement target, object[] arg3)
{
DependencyObject root = null;
while (target != null)
{
root = target;
target = ParentObserver.FindParent(target) as FrameworkElement;
}
var frameworkElement = root as FrameworkElement;
if (frameworkElement == null)
{
return(null);
}
var name = (string)arg3[0];
return(frameworkElement.FindName(name) ?? FindChild(root, name));
}
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 override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath)
{
object item = GetItemAt(indexPath);
var selector = _templateProvider.TableCellTemplateSelector;
if (selector == null)
{
throw new NotSupportedException("The ItemTemplate is null to create UITableViewCell use the ItemTemplate with ITableCellTemplateSelector value.");
}
UITableViewCell cell;
if (selector is ITableCellTemplateSelectorSupportDequeueReusableCell)
{
cell = ((ITableCellTemplateSelectorSupportDequeueReusableCell)selector).DequeueReusableCell(tableView, item, indexPath);
}
else
{
cell = tableView.DequeueReusableCell(selector.GetIdentifier(item, tableView), indexPath);
}
_lastCreatedCell = cell;
_lastCreatedCellPath = indexPath;
if (Equals(item, _selectedItem) && !cell.Selected)
{
tableView.SelectRow(indexPath, false, UITableViewScrollPosition.None);
}
cell.Tag |= InitializingStateMask;
cell.SetDataContext(item);
if (!HasMask(cell, InitializedStateMask))
{
cell.Tag |= InitializedStateMask;
ParentObserver.GetOrAdd(cell).Parent = tableView;
selector.InitializeTemplate(tableView, cell);
}
cell.Tag &= ~InitializingStateMask;
(cell as IHasDisplayCallback)?.WillDisplay();
return(cell);
}
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 override UICollectionViewCell GetCell(UICollectionView collectionView, NSIndexPath indexPath)
{
var selector = _itemTemplateProvider.CollectionCellTemplateSelector;
if (selector == null)
{
throw new NotSupportedException("The ItemTemplate is null to create UICollectionViewCell use the ItemTemplate with ICollectionCellTemplateSelector value.");
}
object item = GetItemAt(indexPath);
NSString identifier = selector.GetIdentifier(item, collectionView);
var cell = (UICollectionViewCell)collectionView.DequeueReusableCell(identifier, indexPath);
_lastCreatedCell = cell;
_lastCreatedCellPath = indexPath;
if (Equals(item, _selectedItem) && !cell.Selected)
{
collectionView.SelectItem(indexPath, false, UICollectionViewScrollPosition.None);
}
cell.Tag |= InitializingStateMask;
cell.SetDataContext(item);
if (!HasMask(cell, InitializedStateMask))
{
cell.Tag |= InitializedStateMask;
ParentObserver.GetOrAdd(cell).Parent = collectionView;
selector.InitializeTemplate(collectionView, cell);
}
cell.Tag &= ~InitializingStateMask;
var initializableItem = cell as IHasDisplayCallback;
if (initializableItem != null)
{
initializableItem.WillDisplay();
}
return(cell);
}
private static void AddButtonOS7([NotNull] this UIActionSheet actionSheet, string title, string binding, IList <object> sources)
{
var id = Guid.NewGuid().ToString("N");
actionSheet.AddButton(id);
var subviews = actionSheet.Subviews;
UIButton button = null;
if (subviews != null)
{
button = subviews.OfType <UIButton>().FirstOrDefault(view => view.CurrentTitle == id);
}
if (button == null)
{
actionSheet.AddButtonOS8(title, binding, sources);
return;
}
button.SetTitle(title, button.State);
ParentObserver.GetOrAdd(button).Parent = actionSheet;
if (!string.IsNullOrEmpty(binding))
{
button.SetBindings(binding, sources);
}
}
public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath)
{
object item = GetItemAt(indexPath);
var selector = _templateProvider.TemplateSelector;
if (selector == null)
{
throw new NotSupportedException("The ItemTemplate is null to create UITableViewCell use the ItemTemplate with ITableCellTemplateSelector value.");
}
var cellTemplateSelectorSupportDequeueReusableCell = selector as ITableCellTemplateSelectorSupportDequeueReusableCell;
var cell = cellTemplateSelectorSupportDequeueReusableCell == null
? tableView.DequeueReusableCell(selector.GetIdentifier(item, tableView), indexPath)
: cellTemplateSelectorSupportDequeueReusableCell.DequeueReusableCell(tableView, item, indexPath);
cell.SetDataContext(item);
if (!HasMask(cell, InitializedStateMask))
{
cell.Tag |= InitializedStateMask;
ParentObserver.Set(cell, tableView);
selector.InitializeTemplate(tableView, cell);
InitializeCell(cell);
}
return(cell);
}
public static void RegisterViewMembers()
{
MemberProvider.Register(AttachedBindingMember.CreateMember <UIView, object>(AttachedMemberConstants.Parent,
(info, view) => ParentObserver.GetOrAdd(view).Parent, (info, view, arg3) => ParentObserver.GetOrAdd(view).Parent = arg3,
(info, view, arg3) => ParentObserver.GetOrAdd(view).AddWithUnsubscriber(arg3)));
MemberProvider.Register(AttachedBindingMember.CreateMember <UIView, object>(AttachedMemberConstants.FindByNameMethod, FindViewByName));
MemberProvider.Register(AttachedBindingMember.CreateAutoProperty(AttachedMembers.UIView.Content, ContentChanged));
var member = AttachedBindingMember.CreateAutoProperty(AttachedMembers.UIView.ContentTemplateSelector, ContentTemplateChanged);
MemberProvider.Register(member);
MemberProvider.Register(typeof(UIView), AttachedMemberConstants.ContentTemplate, member, true);
MemberProvider.Register(AttachedBindingMember.CreateMember(AttachedMembers.UIView.Visible, (info, view) => !view.Hidden, (info, view, arg3) => view.Hidden = !arg3));
}
private static void SetViewParentValue(IBindingMemberInfo bindingMemberInfo, View view, object arg3)
{
ParentObserver.GetOrAdd(view).Parent = arg3;
}
private static object GetViewParentValue(IBindingMemberInfo arg1, View view)
{
return(ParentObserver.GetOrAdd(view).Parent);
}
private static IDisposable ObserveViewParent(IBindingMemberInfo bindingMemberInfo, View view, IEventListener arg3)
{
return(ParentObserver.GetOrAdd(view).AddWithUnsubscriber(arg3));
}
