Class UndoManager
Undo-redo interface; one-to-one mapped to document
Inheritance
Namespace: pdftron.SDF
Assembly: PDFNetAndroid.dll
Syntax
public class UndoManager : IDisposableConstructors
UndoManager(System.IntPtr)
Declaration
public UndoManager(System.IntPtr impl_ptr)Parameters
| Type | Name | Description |
|---|---|---|
| System.IntPtr | impl_ptr |
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 |
Destroy()
Declaration
public void Destroy()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 void Dispose()Dispose(Boolean)
Declaration
protected virtual void Dispose(bool disposing)Parameters
| Type | Name | Description |
|---|---|---|
| System.Boolean | disposing |
Finalize()
Declaration
protected void Finalize()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 |