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UIFocusSystem.xml
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UIFocusSystem.xml
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<Type Name="UIFocusSystem" FullName="UIKit.UIFocusSystem">
<TypeSignature Language="C#" Value="public class UIFocusSystem : Foundation.NSObject" />
<TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit UIFocusSystem extends Foundation.NSObject" />
<TypeSignature Language="DocId" Value="T:UIKit.UIFocusSystem" />
<TypeSignature Language="F#" Value="type UIFocusSystem = class
 inherit NSObject" />
<AssemblyInfo>
<AssemblyName>Xamarin.iOS</AssemblyName>
<AssemblyVersion>0.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Base>
<BaseTypeName>Foundation.NSObject</BaseTypeName>
</Base>
<Interfaces />
<Attributes>
<Attribute>
<AttributeName>Foundation.Register("UIFocusSystem", true)</AttributeName>
</Attribute>
<Attribute>
<AttributeName>ObjCRuntime.Introduced(ObjCRuntime.PlatformName.iOS, 11, 0, ObjCRuntime.PlatformArchitecture.All, null)</AttributeName>
</Attribute>
<Attribute>
<AttributeName>ObjCRuntime.Introduced(ObjCRuntime.PlatformName.TvOS, 11, 0, ObjCRuntime.PlatformArchitecture.All, null)</AttributeName>
</Attribute>
<Attribute>
<AttributeName>ObjCRuntime.Unavailable(ObjCRuntime.PlatformName.WatchOS, ObjCRuntime.PlatformArchitecture.All, null)</AttributeName>
</Attribute>
</Attributes>
<Docs>
<summary>The current focus state.</summary>
<remarks>To be added.</remarks>
</Docs>
<Members>
<Member MemberName=".ctor">
<MemberSignature Language="C#" Value="protected UIFocusSystem (Foundation.NSObjectFlag t);" />
<MemberSignature Language="ILAsm" Value=".method familyhidebysig specialname rtspecialname instance void .ctor(class Foundation.NSObjectFlag t) cil managed" />
<MemberSignature Language="DocId" Value="M:UIKit.UIFocusSystem.#ctor(Foundation.NSObjectFlag)" />
<MemberSignature Language="F#" Value="new UIKit.UIFocusSystem : Foundation.NSObjectFlag -> UIKit.UIFocusSystem" Usage="new UIKit.UIFocusSystem t" />
<MemberType>Constructor</MemberType>
<AssemblyInfo>
<AssemblyName>Xamarin.iOS</AssemblyName>
<AssemblyVersion>0.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName>ObjCRuntime.BindingImpl(ObjCRuntime.BindingImplOptions.GeneratedCode | ObjCRuntime.BindingImplOptions.Optimizable)</AttributeName>
</Attribute>
<Attribute>
<AttributeName>System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)</AttributeName>
</Attribute>
</Attributes>
<Parameters>
<Parameter Name="t" Type="Foundation.NSObjectFlag" />
</Parameters>
<Docs>
<param name="t">Unused sentinel value, pass NSObjectFlag.Empty.</param>
<summary>Constructor to call on derived classes to skip initialization and merely allocate the object.</summary>
<remarks>
<para>This constructor should be called by derived classes when they completely construct the object in managed code and merely want the runtime to allocate and initialize the NSObject. This is required to implement the two-step initialization process that Objective-C uses, the first step is to perform the object allocation, the second step is to initialize the object. When developers invoke the constructor that takes the NSObjectFlag.Empty they take advantage of a direct path that goes all the way up to NSObject to merely allocate the object's memory and bind the Objective-C and C# objects together. The actual initialization of the object is up to the developer.</para>
<para>This constructor is typically used by the binding generator to allocate the object, but prevent the actual initialization to take place. Once the allocation has taken place, the constructor has to initialize the object. With constructors generated by the binding generator this means that it manually invokes one of the "init" methods to initialize the object.</para>
<para>It is the developer's responsibility to completely initialize the object if they chain up using the NSObjectFlag.Empty path.</para>
<para>In general, if the developer's constructor invokes the NSObjectFlag.Empty base implementation, then it should be calling an Objective-C init method. If this is not the case, developers should instead chain to the proper constructor in their class. </para>
<para>The argument value is ignored and merely ensures that the only code that is executed is the construction phase is the basic NSObject allocation and runtime type registration. Typically the chaining would look like this:</para>
<example>
<code lang="csharp lang-csharp"><![CDATA[
//
// The NSObjectFlag merely allocates the object and registers the
// C# class with the Objective-C runtime if necessary, but no actual
// initXxx method is invoked, that is done later in the constructor
//
// This is taken from Xamarin.iOS's source code:
//
[Export ("initWithFrame:")]
public UIView (System.Drawing.RectangleF frame) : base (NSObjectFlag.Empty)
{
// Invoke the init method now.
var initWithFrame = new Selector ("initWithFrame:").Handle;
if (IsDirectBinding)
Handle = ObjCRuntime.Messaging.IntPtr_objc_msgSend_CGRect (this.Handle, initWithFrame, frame);
else
Handle = ObjCRuntime.Messaging.IntPtr_objc_msgSendSuper_CGRect (this.SuperHandle, initWithFrame, frame);
}
]]></code>
</example>
</remarks>
</Docs>
</Member>
<Member MemberName=".ctor">
<MemberSignature Language="C#" Value="protected internal UIFocusSystem (IntPtr handle);" />
<MemberSignature Language="ILAsm" Value=".method familyorassemblyhidebysig specialname rtspecialname instance void .ctor(native int handle) cil managed" />
<MemberSignature Language="DocId" Value="M:UIKit.UIFocusSystem.#ctor(System.IntPtr)" />
<MemberSignature Language="F#" Value="new UIKit.UIFocusSystem : nativeint -> UIKit.UIFocusSystem" Usage="new UIKit.UIFocusSystem handle" />
<MemberType>Constructor</MemberType>
<AssemblyInfo>
<AssemblyName>Xamarin.iOS</AssemblyName>
<AssemblyVersion>0.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName>ObjCRuntime.BindingImpl(ObjCRuntime.BindingImplOptions.GeneratedCode | ObjCRuntime.BindingImplOptions.Optimizable)</AttributeName>
</Attribute>
<Attribute>
<AttributeName>System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)</AttributeName>
</Attribute>
</Attributes>
<Parameters>
<Parameter Name="handle" Type="System.IntPtr" />
</Parameters>
<Docs>
<param name="handle">Pointer (handle) to the unmanaged object.</param>
<summary>A constructor used when creating managed representations of unmanaged objects; Called by the runtime.</summary>
<remarks>
<para>This constructor is invoked by the runtime infrastructure (<see cref="M:ObjCRuntime.Runtime.GetNSObject(System.IntPtr)" />) to create a new managed representation for a pointer to an unmanaged Objective-C object. Developers should not invoke this method directly, instead they should call the GetNSObject method as it will prevent two instances of a managed object to point to the same native object.</para>
</remarks>
</Docs>
</Member>
<Member MemberName="ClassHandle">
<MemberSignature Language="C#" Value="public override IntPtr ClassHandle { get; }" />
<MemberSignature Language="ILAsm" Value=".property instance native int ClassHandle" />
<MemberSignature Language="DocId" Value="P:UIKit.UIFocusSystem.ClassHandle" />
<MemberSignature Language="F#" Value="member this.ClassHandle : nativeint" Usage="UIKit.UIFocusSystem.ClassHandle" />
<MemberType>Property</MemberType>
<AssemblyInfo>
<AssemblyName>Xamarin.iOS</AssemblyName>
<AssemblyVersion>0.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.IntPtr</ReturnType>
</ReturnValue>
<Docs>
<summary>The handle for this class.</summary>
<value>The pointer to the Objective-C class.</value>
<remarks>Each Xamarin.iOS class mirrors an unmanaged Objective-C class. This value contains the pointer to the Objective-C class, it is similar to calling objc_getClass with the object name.</remarks>
</Docs>
</Member>
<Member MemberName="Contains">
<MemberSignature Language="C#" Value="public static bool Contains (UIKit.IUIFocusEnvironment environment, UIKit.IUIFocusEnvironment otherEnvironment);" />
<MemberSignature Language="ILAsm" Value=".method public static hidebysig bool Contains(class UIKit.IUIFocusEnvironment environment, class UIKit.IUIFocusEnvironment otherEnvironment) cil managed" />
<MemberSignature Language="DocId" Value="M:UIKit.UIFocusSystem.Contains(UIKit.IUIFocusEnvironment,UIKit.IUIFocusEnvironment)" />
<MemberSignature Language="F#" Value="static member Contains : UIKit.IUIFocusEnvironment * UIKit.IUIFocusEnvironment -> bool" Usage="UIKit.UIFocusSystem.Contains (environment, otherEnvironment)" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>Xamarin.iOS</AssemblyName>
<AssemblyVersion>0.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName>Foundation.Export("environment:containsEnvironment:")</AttributeName>
</Attribute>
<Attribute>
<AttributeName>ObjCRuntime.BindingImpl(ObjCRuntime.BindingImplOptions.GeneratedCode | ObjCRuntime.BindingImplOptions.Optimizable)</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Boolean</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="environment" Type="UIKit.IUIFocusEnvironment" />
<Parameter Name="otherEnvironment" Type="UIKit.IUIFocusEnvironment" />
</Parameters>
<Docs>
<param name="environment">The possibly containing environment.</param>
<param name="otherEnvironment">The possibly nested environment.</param>
<summary>Returns <see langword="true" /> if <paramref name="environment" /> contains <paramref name="otherEnvironment" />. Otherwise, returns <see langword="false" />.</summary>
<returns>To be added.</returns>
<remarks>To be added.</remarks>
</Docs>
</Member>
<Member MemberName="Create">
<MemberSignature Language="C#" Value="public static UIKit.UIFocusSystem Create (UIKit.IUIFocusEnvironment environment);" />
<MemberSignature Language="ILAsm" Value=".method public static hidebysig class UIKit.UIFocusSystem Create(class UIKit.IUIFocusEnvironment environment) cil managed" />
<MemberSignature Language="DocId" Value="M:UIKit.UIFocusSystem.Create(UIKit.IUIFocusEnvironment)" />
<MemberSignature Language="F#" Value="static member Create : UIKit.IUIFocusEnvironment -> UIKit.UIFocusSystem" Usage="UIKit.UIFocusSystem.Create environment" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyVersion>0.0.0.0</AssemblyVersion>
<AssemblyName>Xamarin.iOS</AssemblyName>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName>Foundation.Export("focusSystemForEnvironment:")</AttributeName>
</Attribute>
<Attribute>
<AttributeName>ObjCRuntime.BindingImpl(ObjCRuntime.BindingImplOptions.GeneratedCode | ObjCRuntime.BindingImplOptions.Optimizable)</AttributeName>
</Attribute>
<Attribute>
<AttributeName>ObjCRuntime.Introduced(ObjCRuntime.PlatformName.TvOS, 12, 0, ObjCRuntime.PlatformArchitecture.All, null)</AttributeName>
</Attribute>
<Attribute>
<AttributeName>ObjCRuntime.Introduced(ObjCRuntime.PlatformName.iOS, 12, 0, ObjCRuntime.PlatformArchitecture.All, null)</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>UIKit.UIFocusSystem</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="environment" Type="UIKit.IUIFocusEnvironment" />
</Parameters>
<Docs>
<param name="environment">The focus environment for which to create a new focus system.</param>
<summary>Creates and returns a new focus system for the provided focus environment.</summary>
<returns>A new focus system for the provided focus environment.</returns>
<remarks>To be added.</remarks>
</Docs>
</Member>
<Member MemberName="Dispose">
<MemberSignature Language="C#" Value="protected override void Dispose (bool disposing);" />
<MemberSignature Language="ILAsm" Value=".method familyhidebysig virtual instance void Dispose(bool disposing) cil managed" />
<MemberSignature Language="DocId" Value="M:UIKit.UIFocusSystem.Dispose(System.Boolean)" />
<MemberSignature Language="F#" Value="override this.Dispose : bool -> unit" Usage="uIFocusSystem.Dispose disposing" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyVersion>0.0.0.0</AssemblyVersion>
<AssemblyName>Xamarin.iOS</AssemblyName>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName>ObjCRuntime.BindingImpl(ObjCRuntime.BindingImplOptions.GeneratedCode | ObjCRuntime.BindingImplOptions.Optimizable)</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="disposing" Type="System.Boolean" />
</Parameters>
<Docs>
<param name="disposing">
<para>If set to <see langword="true" />, the method is invoked directly and will dispose manage and unmanaged resources; If set to <see langword="false" /> the method is being called by the garbage collector finalizer and should only release unmanaged resources.</para>
</param>
<summary>Releases the resources used by the UIFocusSystem object.</summary>
<remarks>
<para>This Dispose method releases the resources used by the UIFocusSystem class.</para>
<para>This method is called by both the Dispose() method and the object finalizer (Finalize). When invoked by the Dispose method, the parameter disposing <paramref name="disposing" /> is set to <see langword="true" /> and any managed object references that this object holds are also disposed or released; when invoked by the object finalizer, on the finalizer thread the value is set to <see langword="false" />. </para>
<para>Calling the Dispose method when the application is finished using the UIFocusSystem ensures that all external resources used by this managed object are released as soon as possible. Once developers have invoked the Dispose method, the object is no longer useful and developers should no longer make any calls to it.</para>
<para> For more information on how to override this method and on the Dispose/IDisposable pattern, read the ``Implementing a Dispose Method'' document at https://msdn.microsoft.com/en-us/library/fs2xkftw.aspx</para>
</remarks>
</Docs>
</Member>
<Member MemberName="FocusedItem">
<MemberSignature Language="C#" Value="public virtual UIKit.IUIFocusItem FocusedItem { get; }" />
<MemberSignature Language="ILAsm" Value=".property instance class UIKit.IUIFocusItem FocusedItem" />
<MemberSignature Language="DocId" Value="P:UIKit.UIFocusSystem.FocusedItem" />
<MemberSignature Language="F#" Value="member this.FocusedItem : UIKit.IUIFocusItem" Usage="UIKit.UIFocusSystem.FocusedItem" />
<MemberType>Property</MemberType>
<AssemblyInfo>
<AssemblyVersion>0.0.0.0</AssemblyVersion>
<AssemblyName>Xamarin.iOS</AssemblyName>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName>ObjCRuntime.BindingImpl(ObjCRuntime.BindingImplOptions.GeneratedCode | ObjCRuntime.BindingImplOptions.Optimizable)</AttributeName>
</Attribute>
<Attribute>
<AttributeName>ObjCRuntime.Introduced(ObjCRuntime.PlatformName.TvOS, 12, 0, ObjCRuntime.PlatformArchitecture.All, null)</AttributeName>
</Attribute>
<Attribute>
<AttributeName>ObjCRuntime.Introduced(ObjCRuntime.PlatformName.iOS, 12, 0, ObjCRuntime.PlatformArchitecture.All, null)</AttributeName>
</Attribute>
<Attribute>
<AttributeName>get: ObjCRuntime.Introduced(ObjCRuntime.PlatformName.TvOS, 12, 0, ObjCRuntime.PlatformArchitecture.All, null)</AttributeName>
</Attribute>
<Attribute>
<AttributeName>get: ObjCRuntime.Introduced(ObjCRuntime.PlatformName.iOS, 12, 0, ObjCRuntime.PlatformArchitecture.All, null)</AttributeName>
</Attribute>
<Attribute>
<AttributeName>get: Foundation.Export("focusedItem", ObjCRuntime.ArgumentSemantic.Weak)</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>UIKit.IUIFocusItem</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets the item that has the focus.</summary>
<value>The item that has the focus.</value>
<remarks>To be added.</remarks>
</Docs>
</Member>
<Member MemberName="RequestFocusUpdate">
<MemberSignature Language="C#" Value="public virtual void RequestFocusUpdate (UIKit.IUIFocusEnvironment environment);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance void RequestFocusUpdate(class UIKit.IUIFocusEnvironment environment) cil managed" />
<MemberSignature Language="DocId" Value="M:UIKit.UIFocusSystem.RequestFocusUpdate(UIKit.IUIFocusEnvironment)" />
<MemberSignature Language="F#" Value="abstract member RequestFocusUpdate : UIKit.IUIFocusEnvironment -> unit
override this.RequestFocusUpdate : UIKit.IUIFocusEnvironment -> unit" Usage="uIFocusSystem.RequestFocusUpdate environment" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyVersion>0.0.0.0</AssemblyVersion>
<AssemblyName>Xamarin.iOS</AssemblyName>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName>Foundation.Export("requestFocusUpdateToEnvironment:")</AttributeName>
</Attribute>
<Attribute>
<AttributeName>ObjCRuntime.BindingImpl(ObjCRuntime.BindingImplOptions.GeneratedCode | ObjCRuntime.BindingImplOptions.Optimizable)</AttributeName>
</Attribute>
<Attribute>
<AttributeName>ObjCRuntime.Introduced(ObjCRuntime.PlatformName.TvOS, 12, 0, ObjCRuntime.PlatformArchitecture.All, null)</AttributeName>
</Attribute>
<Attribute>
<AttributeName>ObjCRuntime.Introduced(ObjCRuntime.PlatformName.iOS, 12, 0, ObjCRuntime.PlatformArchitecture.All, null)</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="environment" Type="UIKit.IUIFocusEnvironment" />
</Parameters>
<Docs>
<param name="environment">The visual object whose focus state to update.</param>
<summary>Requests that the system update the specified focus environment.</summary>
<remarks>To be added.</remarks>
</Docs>
</Member>
<Member MemberName="UpdateFocusIfNeeded">
<MemberSignature Language="C#" Value="public virtual void UpdateFocusIfNeeded ();" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance void UpdateFocusIfNeeded() cil managed" />
<MemberSignature Language="DocId" Value="M:UIKit.UIFocusSystem.UpdateFocusIfNeeded" />
<MemberSignature Language="F#" Value="abstract member UpdateFocusIfNeeded : unit -> unit
override this.UpdateFocusIfNeeded : unit -> unit" Usage="uIFocusSystem.UpdateFocusIfNeeded " />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyVersion>0.0.0.0</AssemblyVersion>
<AssemblyName>Xamarin.iOS</AssemblyName>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName>Foundation.Export("updateFocusIfNeeded")</AttributeName>
</Attribute>
<Attribute>
<AttributeName>ObjCRuntime.BindingImpl(ObjCRuntime.BindingImplOptions.GeneratedCode | ObjCRuntime.BindingImplOptions.Optimizable)</AttributeName>
</Attribute>
<Attribute>
<AttributeName>ObjCRuntime.Introduced(ObjCRuntime.PlatformName.TvOS, 12, 0, ObjCRuntime.PlatformArchitecture.All, null)</AttributeName>
</Attribute>
<Attribute>
<AttributeName>ObjCRuntime.Introduced(ObjCRuntime.PlatformName.iOS, 12, 0, ObjCRuntime.PlatformArchitecture.All, null)</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<summary>Forces the update of any environments for which an update was earlier requested with <see cref="M:UIKit.UIFocusSystem.RequestFocusUpdate(UIKit.IUIFocusEnvironment)" />.</summary>
<remarks>To be added.</remarks>
</Docs>
</Member>
</Members>
</Type>