当前页面: 在线文档首页 > JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class UndoableEditSupport - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

Overview  Package   Class  Use  Tree  Deprecated  Index  Help		JavaTM 2 Platform Standard Edition
PREV CLASS   NEXT CLASS	FRAMES    NO FRAMES
SUMMARY:  INNER | FIELD | CONSTR | METHOD	DETAIL:  FIELD | CONSTR | METHOD

---

javax.swing.undo
Class UndoableEditSupport

java.lang.Object
  |
  +--javax.swing.undo.UndoableEditSupport

---

public class UndoableEditSupport

extends Object

A support class used for managing UndoableEdit listeners.

---

Field Summary
protected  CompoundEdit	compoundEdit
protected  Vector	listeners
protected  Object	realSource
protected  int	updateLevel

 

Constructor Summary

UndoableEditSupport()           Constructs an UndoableEditSupport object.

UndoableEditSupport(Object r)           Constructs an UndoableEditSupport object.

 

Method Summary
protected  void	_postEdit(UndoableEdit e)           Called only from postEdit and endUpdate.
void	addUndoableEditListener(UndoableEditListener l)           Registers an UndoableEditListener.
void	beginUpdate()
protected  CompoundEdit	createCompoundEdit()           Called only from beginUpdate.
void	endUpdate()           DEADLOCK WARNING: Calling this method may call undoableEditHappened in all listeners.
int	getUpdateLevel()           Returns the update level value.
void	postEdit(UndoableEdit e)           DEADLOCK WARNING: Calling this method may call undoableEditHappened in all listeners.
void	removeUndoableEditListener(UndoableEditListener l)           Removes an UndoableEditListener.
String	toString()           Returns a string that displays and identifies this object's properties.

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

 

Field Detail

updateLevel

protected int updateLevel

---

compoundEdit

protected CompoundEdit compoundEdit

---

listeners

protected Vector listeners

---

realSource

protected Object realSource

Constructor Detail

UndoableEditSupport

public UndoableEditSupport()

Constructs an UndoableEditSupport object.

---

UndoableEditSupport

public UndoableEditSupport(Object r)

Constructs an UndoableEditSupport object.

Parameters:

r - an Object

Method Detail

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)

---

removeUndoableEditListener

public void removeUndoableEditListener(UndoableEditListener l)

Removes an UndoableEditListener.

Parameters:

l - an UndoableEditListener object

See Also:

addUndoableEditListener(javax.swing.event.UndoableEditListener)

---

_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 synchonized.

---

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.

---

getUpdateLevel

public int getUpdateLevel()

Returns the update level value.

Returns:

an int representing the update level

---

beginUpdate

public void beginUpdate()

---

createCompoundEdit

protected CompoundEdit createCompoundEdit()

Called only from beginUpdate. Exposed here for subclasses' use

---

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.

---

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

---

Overview  Package   Class  Use  Tree  Deprecated  Index  Help		JavaTM 2 Platform Standard Edition
PREV CLASS   NEXT CLASS	FRAMES    NO FRAMES
SUMMARY:  INNER | FIELD | CONSTR | METHOD	DETAIL:  FIELD | CONSTR | METHOD

---

Submit a bug or feature
Java, Java 2D, and JDBC are a trademarks or registered trademarks of Sun Microsystems, Inc. in the US and other countries.
Copyright 1993-1999 Sun Microsystems, Inc. 901 San Antonio Road,
Palo Alto, California, 94303, U.S.A. All Rights Reserved.