UndoRedo (UI Utilities API)

All Known Implementing Classes:

UndoRedo.Empty, UndoRedo.Manager
```
public interface UndoRedo
```
Undo and Redo manager for top components and workspace elements. It allows UndoAction and RedoAction to listen to editing changes of active components and to changes in their ability to do undo and redo.
Related links:

Nested Class Summary

Nested Classes
Modifier and Type	Interface and Description
`static class`	`UndoRedo.Empty` Deprecated. Use `UndoRedo.NONE` rather than instantiating this.
`static class`	`UndoRedo.Manager` An undo manager which fires a change event each time it consumes a new undoable edit.
`static interface`	`UndoRedo.Provider` Components that provide `UndoRedo` shall announce that by implementing this provider interface.

Field Summary

Fields
Modifier and Type Field and Description

static UndoRedo NONE
Empty implementation that does not allow any undo or redo actions.

Fields
Modifier and Type	Field and Description
`static UndoRedo`	`NONE` Empty implementation that does not allow any undo or redo actions.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`addChangeListener(ChangeListener l)` Add a change listener.
`boolean`	`canRedo()` Test whether the component currently has undone edits which may be redone.
`boolean`	`canUndo()` Test whether the component currently has edits which may be undone.
`String`	`getRedoPresentationName()` Get a human-presentable name describing the redo operation.
`String`	`getUndoPresentationName()` Get a human-presentable name describing the undo operation.
`void`	`redo()` Redo a previously undone edit.
`void`	`removeChangeListener(ChangeListener l)` Remove a change listener.
`void`	`undo()` Undo an edit.

- Field Detail
  - NONE
```
static final UndoRedo NONE
```
    Empty implementation that does not allow any undo or redo actions.
- Method Detail
  - canUndo
```
boolean canUndo()
```
    Test whether the component currently has edits which may be undone.
    
    Returns:
    
    true if undo is allowed
  - canRedo
```
boolean canRedo()
```
    Test whether the component currently has undone edits which may be redone.
    
    Returns:
    
    true if redo is allowed
  - undo
```
void undo()
   throws CannotUndoException
```
    Undo an edit.
    
    Throws:
    
    CannotUndoException - if it fails
  - redo
```
void redo()
   throws CannotRedoException
```
    Redo a previously undone edit.
    
    Throws:
    
    CannotRedoException - if it fails
  - addChangeListener
```
void addChangeListener(ChangeListener l)
```
    Add a change listener. The listener will be notified every time the undo/redo ability of this object changes.
    
    Parameters:
    
    l - the listener to add
  - removeChangeListener
```
void removeChangeListener(ChangeListener l)
```
    Remove a change listener.
    
    Parameters:
    
    l - the listener to remove
    
    See Also:
    
    UndoRedo.addChangeListener(javax.swing.event.ChangeListener)
  - getUndoPresentationName
```
String getUndoPresentationName()
```
    Get a human-presentable name describing the undo operation.
    
    Returns:
    
    the name
  - getRedoPresentationName
```
String getRedoPresentationName()
```
    Get a human-presentable name describing the redo operation.
    
    Returns:
    
    the name

Interface UndoRedo

Nested Class Summary

Field Summary

Method Summary

Field Detail

NONE

Method Detail

canUndo

canRedo

undo

redo

addChangeListener

removeChangeListener

getUndoPresentationName

getRedoPresentationName