Class UndoManager

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

Inheritance

System.Object

UndoManager

Implements

System.IDisposable

Inherited Members

System.Object.ToString()

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

Namespace: pdftron.SDF

Assembly: PDFNet.dll

Syntax

public sealed class UndoManager : IDisposable

Methods

CanRedo()

Returns a boolean indicating whether it is possible to redo from the current snapshot.

Declaration

public bool CanRedo()

Returns

Type	Description
System.Boolean	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.

Declaration

public bool CanUndo()

Returns

Type	Description
System.Boolean	Whether it is possible to undo from the current snapshot

DiscardAllSnapshots()

Forget all changes in this manager (without changing the document).

Declaration

public DocSnapshot DiscardAllSnapshots()

Returns

Type	Description
DocSnapshot	An invalid DocSnapshot

Dispose()

Declaration

public override sealed void Dispose()

Dispose(Boolean)

Declaration

protected void Dispose(bool A_0)

Parameters

Type	Name	Description
System.Boolean	A_0

GetNextRedoSnapshot()

Gets the next state of the document. This state may be invalid if it is impossible to redo.

Declaration

public DocSnapshot GetNextRedoSnapshot()

Returns

Type	Description
DocSnapshot	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.

Declaration

public DocSnapshot GetNextUndoSnapshot()

Returns

Type	Description
DocSnapshot	The previous state of the document. This state may be invalid if it is impossible to undo

Redo()

Restores to the next snapshot, if there is one.

Declaration

public ResultSnapshot Redo()

Returns

Type	Description
ResultSnapshot	A representation of the transition to the next snapshot, if there is one

TakeSnapshot()

Creates a snapshot of document state, transitions to the new snapshot.

Declaration

public ResultSnapshot TakeSnapshot()

Returns

Type	Description
ResultSnapshot	A representation of the transition

Undo()

Restores to the previous snapshot point, if there is one.

Declaration

public ResultSnapshot Undo()

Returns

Type	Description
ResultSnapshot	The resulting snapshot id

Implements

System.IDisposable