SourceChangedEventArgs Class
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SourceChangedEventArgs Class

 

Provides data for the SourceChanged event, used for interoperation. This class cannot be inherited.

Namespace:   System.Windows
Assembly:  PresentationCore (in PresentationCore.dll)

System.Object
  System.EventArgs
    System.Windows.RoutedEventArgs
      System.Windows.SourceChangedEventArgs

public sealed class SourceChangedEventArgs : RoutedEventArgs

NameDescription
System_CAPS_pubmethodSourceChangedEventArgs(PresentationSource, PresentationSource)

Initializes a new instance of the SourceChangedEventArgs class, using supplied information for the old and new sources.

System_CAPS_pubmethodSourceChangedEventArgs(PresentationSource, PresentationSource, IInputElement, IInputElement)

Initializes a new instance of the SourceChangedEventArgs class, using supplied information for the old and new sources, the element that this change effects, and the previous reported parent of that element.

NameDescription
System_CAPS_pubpropertyElement

Gets the element whose parent change causing the presentation source information to change.

System_CAPS_pubpropertyHandled

Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route. (Inherited from RoutedEventArgs.)

System_CAPS_pubpropertyNewSource

Gets the new source involved in this source change.

System_CAPS_pubpropertyOldParent

Gets the previous parent of the element whose parent change causing the presentation source information to change.

System_CAPS_pubpropertyOldSource

Gets the old source involved in this source change.

System_CAPS_pubpropertyOriginalSource

Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class.(Inherited from RoutedEventArgs.)

System_CAPS_pubpropertyRoutedEvent

Gets or sets the RoutedEvent associated with this RoutedEventArgs instance. (Inherited from RoutedEventArgs.)

System_CAPS_pubpropertySource

Gets or sets a reference to the object that raised the event. (Inherited from RoutedEventArgs.)

NameDescription
System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

The SourceChanged event is a routed event where the event identifier is not publicly exposed. This is because this event plays a potentially critical part in interoperation and should not be allowed to be raised arbitrarily by any other source than the internal implementation of a known PresentationSource subclass (currently, the only such class is HwndSource). When implementing an interoperation solution, you can attach or remove handlers for the event (by calling AddSourceChangedHandler and RemoveSourceChangedHandler, respectively) but you cannot perform other operations normally available to routed events such as class handling, adding owners, or raising the event from an arbitrary element source.

This class overrides the RoutedEventArgs virtual method RoutedEventArgs.InvokeEventHandler, in order to return a type-specific handler when requested by the event system. This SourceChangedEventArgs override does not appear in the class members table in this SDK documentation because it is a protected member implemented by a sealed class.

.NET Framework
Available since 3.0

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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