Package Summary Overview Summary

class:UndoableEditSupport [NONE]

```
public class UndoableEditSupport
extends Object
```
A support class used for managing UndoableEdit listeners.

field:updateLevel [NONE]

updateLevel
```
protected int updateLevel
```
The update level.

field:compoundEdit [NONE]

compoundEdit
```
protected CompoundEdit compoundEdit
```
The compound edit.

field:listeners [NONE]

listeners

protected Vector<UndoableEditListener> listeners

The list of listeners.

field:realSource [NONE]

realSource
```
protected Object realSource
```
The real source.

constructor:UndoableEditSupport() [NONE]

UndoableEditSupport
```
public UndoableEditSupport()
```
Constructs an UndoableEditSupport object.

constructor:UndoableEditSupport(java.lang.Object) [NONE]

UndoableEditSupport
```
public UndoableEditSupport(Object r)
```
Constructs an UndoableEditSupport object.

Parameters:

r - an Object

method:addUndoableEditListener(javax.swing.event.UndoableEditListener) [NONE]

addUndoableEditListener
```
public void addUndoableEditListener(UndoableEditListener l)
```
Registers an UndoableEditListener. The listener is notified whenever an edit occurs which can be undone.

Parameters:

l - an UndoableEditListener object

See Also:

removeUndoableEditListener(javax.swing.event.UndoableEditListener)

method:removeUndoableEditListener(javax.swing.event.UndoableEditListener) [NONE]

removeUndoableEditListener
```
public void removeUndoableEditListener(UndoableEditListener l)
```
Removes an UndoableEditListener.

Parameters:

l - the UndoableEditListener object to be removed

See Also:

addUndoableEditListener(javax.swing.event.UndoableEditListener)

method:getUndoableEditListeners() [NONE]

getUndoableEditListeners
```
public UndoableEditListener[] getUndoableEditListeners()
```
Returns an array of all the UndoableEditListeners added to this UndoableEditSupport with addUndoableEditListener().

Returns:

all of the UndoableEditListeners added or an empty array if no listeners have been added

Since:

1.4

method:_postEdit(javax.swing.undo.UndoableEdit) [NONE]

_postEdit
```
protected void _postEdit(UndoableEdit e)
```
Called only from postEdit and endUpdate. Calls undoableEditHappened in all listeners. No synchronization is performed here, since the two calling methods are synchronized.

Parameters:

e - edit to be verified

method:postEdit(javax.swing.undo.UndoableEdit) [NONE]

postEdit
```
public void postEdit(UndoableEdit e)
```
DEADLOCK WARNING: Calling this method may call undoableEditHappened in all listeners. It is unwise to call this method from one of its listeners.

Parameters:

e - edit to be posted

method:getUpdateLevel() [NONE]

getUpdateLevel
```
public int getUpdateLevel()
```
Returns the update level value.

Returns:

an integer representing the update level

method:beginUpdate() [NONE]

beginUpdate
```
public void beginUpdate()
```

method:createCompoundEdit() [NONE]

createCompoundEdit
```
protected CompoundEdit createCompoundEdit()
```
Called only from beginUpdate. Exposed here for subclasses' use.

Returns:

new created CompoundEdit object

method:endUpdate() [NONE]

endUpdate
```
public void endUpdate()
```
DEADLOCK WARNING: Calling this method may call undoableEditHappened in all listeners. It is unwise to call this method from one of its listeners.

method:toString() [NONE]

toString
```
public String toString()
```
Returns a string that displays and identifies this object's properties.

Overrides:

toString in class Object

Returns:

a String representation of this object