UndoManager Class

Undo-redo interface; one-to-one mapped to document

Inheritance Hierarchy

SystemObject
pdftron.SDFUndoManager

Namespace: pdftron.SDF
Assembly: pdftron (in pdftron.dll) Version: 255.255.255.255

Syntax

public sealed class UndoManager : IClosable

Public NotInheritable Class UndoManager
	Implements IClosable

public ref class UndoManager sealed : IClosable

pdftron.SDF.UndoManager = function();

Type.createClass(
	'pdftron.SDF.UndoManager',
	null,
	Windows.Foundation.IClosable);

The UndoManager type exposes the following members.

Methods

	Name	Description
	CanRedo	Returns a boolean indicating whether it is possible to redo from the current snapshot.
	CanUndo	Returns whether it is possible to undo from the current snapshot.
	Close
	DiscardAllSnapshots	Forget all changes in this manager (without changing the document).
	Equals	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetNextRedoSnapshot	Gets the next state of the document. This state may be invalid if it is impossible to redo.
	GetNextUndoSnapshot	Gets the previous state of the document. This state may be invalid if it is impossible to undo.
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	Redo	Restores to the next snapshot, if there is one.
	TakeSnapshot	Creates a snapshot of document state, transitions to the new snapshot.
	ToString	Returns a string that represents the current object. (Inherited from Object.)
	Undo	Restores to the previous snapshot point, if there is one.