UndoEngine Class

Definition

Namespace:

System.Activities.Presentation

Assembly:

System.Activities.Presentation.dll

Provides undo and redo operation implementations for designers.

public ref class UndoEngine

public class UndoEngine

type UndoEngine = class

Public Class UndoEngine

Inheritance

Object

UndoEngine

Constructors

Name	Description
UndoEngine(EditingContext)	Initializes a new instance of the UndoEngine class.

Properties

Name	Description
IsUndoRedoInProgress	Gets a Boolean value that indicates whether an undo or redo operation is in progress.

Methods

Name	Description
AddUndoUnit(UndoUnit)	Adds the specified unit to the undo stack.
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)
GetRedoActions()	Retrieves an IEnumerable<T> collection of redo operations.
GetType()	Gets the Type of the current instance. (Inherited from Object)
GetUndoActions()	Retrieves an IEnumerable<T> collection of undo operations.
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
Redo()	Removes the last UndoUnit instance from the redo stack, and performs a redo operation on the unit. The UndoUnit instance is then put into the undo stack.
ToString()	Returns a string that represents the current object. (Inherited from Object)
Undo()	Removes the last UndoUnit instance from the undo stack, and performs an undo operation on the unit. The UndoUnit instance is then put into the redo stack.

Events

Name	Description
RedoCompleted	Occurs when the redo operation is completed.
UndoCompleted	Occurs when the undo operation is completed.
UndoRedoBufferChanged	Occurs when the buffers that hold undo and redo operations change.
UndoUnitAdded	Occurs when an undo unit is added to the undo stack.
UndoUnitCancelled	Occurs when an undo unit is cancelled from the undo stack.
UndoUnitDiscarded	Occurs when an undo unit is removed from the undo stack, without first performing an undo operation.