LostFocusEventManager Class

Definition

Namespace:

System.Windows

Assembly:

PresentationFramework.dll

Provides a WeakEventManager implementation so that you can use the "weak event listener" pattern to attach listeners for the LostFocus or LostFocus events.

public ref class LostFocusEventManager : System::Windows::WeakEventManager

public class LostFocusEventManager : System.Windows.WeakEventManager

type LostFocusEventManager = class
    inherit WeakEventManager

Public Class LostFocusEventManager
Inherits WeakEventManager

Inheritance

Object

DispatcherObject

WeakEventManager

LostFocusEventManager

Remarks

In order to be listeners in this pattern, your listener objects must implement IWeakEventListener. You do not need to implement IWeakEventListener on the class that is the source of the events.

WPF data binding uses this WeakEventManager so that internal classes that update bindings can attach listeners for a UIElement.LostFocus or ContentElement.LostFocus event on an object that is the target of a binding. This supports notification for the LostFocus mode of data binding, without creating strong references to data binding targets.

Properties

Dispatcher	Gets the Dispatcher this DispatcherObject is associated with. (Inherited from DispatcherObject)
Item[Object]	Gets or sets the data being stored for the specified source. (Inherited from WeakEventManager)
ReadLock	Establishes a read-lock on the underlying data table, and returns an IDisposable. (Inherited from WeakEventManager)
WriteLock	Establishes a write-lock on the underlying data table, and returns an IDisposable. (Inherited from WeakEventManager)

Methods

AddHandler(DependencyObject, EventHandler<RoutedEventArgs>)	Adds the specified event handler, which is called when specified source raises the LostFocus or LostFocus event.
AddListener(DependencyObject, IWeakEventListener)	Adds the provided listener to the list of listeners on the provided source.
CheckAccess()	Determines whether the calling thread has access to this DispatcherObject. (Inherited from DispatcherObject)
DeliverEvent(Object, EventArgs)	Delivers the event being managed to each listener. (Inherited from WeakEventManager)
DeliverEventToList(Object, EventArgs, WeakEventManager+ListenerList)	Delivers the event being managed to each listener in the provided list. (Inherited from WeakEventManager)
Equals(Object)	Determines whether the specified object is equal to the current object. (Inherited from Object)
GetHashCode()	Serves as the default hash function. (Inherited from Object)
GetType()	Gets the Type of the current instance. (Inherited from Object)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
NewListenerList()	Returns a new object to contain listeners to the LostFocus or LostFocus event.
ProtectedAddHandler(Object, Delegate)	Adds the specified delegate as an event handler of the specified source. (Inherited from WeakEventManager)
ProtectedAddListener(Object, IWeakEventListener)	Adds the provided listener to the provided source for the event being managed. (Inherited from WeakEventManager)
ProtectedRemoveHandler(Object, Delegate)	Removes the previously added handler from the specified source. (Inherited from WeakEventManager)
ProtectedRemoveListener(Object, IWeakEventListener)	Removes a previously added listener from the provided source. (Inherited from WeakEventManager)
Purge(Object, Object, Boolean)	Removes inactive listener entries from the data list for the provided source. Returns true if some entries were actually removed from the list. (Inherited from WeakEventManager)
Remove(Object)	Removes all listeners for the specified source. (Inherited from WeakEventManager)
RemoveHandler(DependencyObject, EventHandler<RoutedEventArgs>)	Removes the specified event handler from the specified source.
RemoveListener(DependencyObject, IWeakEventListener)	Removes the specified listener from the list of listeners on the provided source.
ScheduleCleanup()	Requests that a purge of unused entries in the underlying listener list be performed on a lower priority thread. (Inherited from WeakEventManager)
StartListening(Object)	Begins listening for the LostFocus event on the given source, attaching an internal class handler to that source.
StopListening(Object)	Stops listening for the LostFocus event on the given source.
ToString()	Returns a string that represents the current object. (Inherited from Object)
VerifyAccess()	Enforces that the calling thread has access to this DispatcherObject. (Inherited from DispatcherObject)

See also

• WeakEventManager
• IWeakEventListener